3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
9 * "I wonder what the Entish is for 'yes' and 'no'," he thought.
12 * This file contains the code that creates, manipulates and destroys
13 * scalar values (SVs). The other types (AV, HV, GV, etc.) reuse the
14 * structure of an SV, so their creation and destruction is handled
15 * here; higher-level functions are in av.c, hv.c, and so on. Opcode
16 * level functions (eg. substr, split, join) for each of the types are
28 /* Missing proto on LynxOS */
29 char *gconvert(double, int, int, char *);
32 #ifdef PERL_UTF8_CACHE_ASSERT
33 /* The cache element 0 is the Unicode offset;
34 * the cache element 1 is the byte offset of the element 0;
35 * the cache element 2 is the Unicode length of the substring;
36 * the cache element 3 is the byte length of the substring;
37 * The checking of the substring side would be good
38 * but substr() has enough code paths to make my head spin;
39 * if adding more checks watch out for the following tests:
40 * t/op/index.t t/op/length.t t/op/pat.t t/op/substr.t
41 * lib/utf8.t lib/Unicode/Collate/t/index.t
44 #define ASSERT_UTF8_CACHE(cache) \
45 STMT_START { if (cache) { assert((cache)[0] <= (cache)[1]); } } STMT_END
47 #define ASSERT_UTF8_CACHE(cache) NOOP
50 #ifdef PERL_COPY_ON_WRITE
51 #define SV_COW_NEXT_SV(sv) INT2PTR(SV *,SvUVX(sv))
52 #define SV_COW_NEXT_SV_SET(current,next) SvUVX(current) = PTR2UV(next)
53 /* This is a pessimistic view. Scalar must be purely a read-write PV to copy-
57 /* ============================================================================
59 =head1 Allocation and deallocation of SVs.
61 An SV (or AV, HV, etc.) is allocated in two parts: the head (struct sv,
62 av, hv...) contains type and reference count information, as well as a
63 pointer to the body (struct xrv, xpv, xpviv...), which contains fields
64 specific to each type.
66 Normally, this allocation is done using arenas, which are approximately
67 1K chunks of memory parcelled up into N heads or bodies. The first slot
68 in each arena is reserved, and is used to hold a link to the next arena.
69 In the case of heads, the unused first slot also contains some flags and
70 a note of the number of slots. Snaked through each arena chain is a
71 linked list of free items; when this becomes empty, an extra arena is
72 allocated and divided up into N items which are threaded into the free
75 The following global variables are associated with arenas:
77 PL_sv_arenaroot pointer to list of SV arenas
78 PL_sv_root pointer to list of free SV structures
80 PL_foo_arenaroot pointer to list of foo arenas,
81 PL_foo_root pointer to list of free foo bodies
82 ... for foo in xiv, xnv, xrv, xpv etc.
84 Note that some of the larger and more rarely used body types (eg xpvio)
85 are not allocated using arenas, but are instead just malloc()/free()ed as
86 required. Also, if PURIFY is defined, arenas are abandoned altogether,
87 with all items individually malloc()ed. In addition, a few SV heads are
88 not allocated from an arena, but are instead directly created as static
89 or auto variables, eg PL_sv_undef.
91 The SV arena serves the secondary purpose of allowing still-live SVs
92 to be located and destroyed during final cleanup.
94 At the lowest level, the macros new_SV() and del_SV() grab and free
95 an SV head. (If debugging with -DD, del_SV() calls the function S_del_sv()
96 to return the SV to the free list with error checking.) new_SV() calls
97 more_sv() / sv_add_arena() to add an extra arena if the free list is empty.
98 SVs in the free list have their SvTYPE field set to all ones.
100 Similarly, there are macros new_XIV()/del_XIV(), new_XNV()/del_XNV() etc
101 that allocate and return individual body types. Normally these are mapped
102 to the arena-manipulating functions new_xiv()/del_xiv() etc, but may be
103 instead mapped directly to malloc()/free() if PURIFY is defined. The
104 new/del functions remove from, or add to, the appropriate PL_foo_root
105 list, and call more_xiv() etc to add a new arena if the list is empty.
107 At the time of very final cleanup, sv_free_arenas() is called from
108 perl_destruct() to physically free all the arenas allocated since the
109 start of the interpreter. Note that this also clears PL_he_arenaroot,
110 which is otherwise dealt with in hv.c.
112 Manipulation of any of the PL_*root pointers is protected by enclosing
113 LOCK_SV_MUTEX; ... UNLOCK_SV_MUTEX calls which should Do the Right Thing
114 if threads are enabled.
116 The function visit() scans the SV arenas list, and calls a specified
117 function for each SV it finds which is still live - ie which has an SvTYPE
118 other than all 1's, and a non-zero SvREFCNT. visit() is used by the
119 following functions (specified as [function that calls visit()] / [function
120 called by visit() for each SV]):
122 sv_report_used() / do_report_used()
123 dump all remaining SVs (debugging aid)
125 sv_clean_objs() / do_clean_objs(),do_clean_named_objs()
126 Attempt to free all objects pointed to by RVs,
127 and, unless DISABLE_DESTRUCTOR_KLUDGE is defined,
128 try to do the same for all objects indirectly
129 referenced by typeglobs too. Called once from
130 perl_destruct(), prior to calling sv_clean_all()
133 sv_clean_all() / do_clean_all()
134 SvREFCNT_dec(sv) each remaining SV, possibly
135 triggering an sv_free(). It also sets the
136 SVf_BREAK flag on the SV to indicate that the
137 refcnt has been artificially lowered, and thus
138 stopping sv_free() from giving spurious warnings
139 about SVs which unexpectedly have a refcnt
140 of zero. called repeatedly from perl_destruct()
141 until there are no SVs left.
145 Private API to rest of sv.c
149 new_XIV(), del_XIV(),
150 new_XNV(), del_XNV(),
155 sv_report_used(), sv_clean_objs(), sv_clean_all(), sv_free_arenas()
160 ============================================================================ */
165 * "A time to plant, and a time to uproot what was planted..."
168 #define plant_SV(p) \
170 SvANY(p) = (void *)PL_sv_root; \
171 SvFLAGS(p) = SVTYPEMASK; \
176 /* sv_mutex must be held while calling uproot_SV() */
177 #define uproot_SV(p) \
180 PL_sv_root = (SV*)SvANY(p); \
185 /* new_SV(): return a new, empty SV head */
187 #ifdef DEBUG_LEAKING_SCALARS
188 /* provide a real function for a debugger to play with */
205 # define new_SV(p) (p)=S_new_SV(aTHX)
223 /* del_SV(): return an empty SV head to the free list */
238 S_del_sv(pTHX_ SV *p)
245 for (sva = PL_sv_arenaroot; sva; sva = (SV *) SvANY(sva)) {
247 svend = &sva[SvREFCNT(sva)];
248 if (p >= sv && p < svend)
252 if (ckWARN_d(WARN_INTERNAL))
253 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
254 "Attempt to free non-arena SV: 0x%"UVxf
255 pTHX__FORMAT, PTR2UV(p) pTHX__VALUE);
262 #else /* ! DEBUGGING */
264 #define del_SV(p) plant_SV(p)
266 #endif /* DEBUGGING */
270 =head1 SV Manipulation Functions
272 =for apidoc sv_add_arena
274 Given a chunk of memory, link it to the head of the list of arenas,
275 and split it into a list of free SVs.
281 Perl_sv_add_arena(pTHX_ char *ptr, U32 size, U32 flags)
287 /* The first SV in an arena isn't an SV. */
288 SvANY(sva) = (void *) PL_sv_arenaroot; /* ptr to next arena */
289 SvREFCNT(sva) = size / sizeof(SV); /* number of SV slots */
290 SvFLAGS(sva) = flags; /* FAKE if not to be freed */
292 PL_sv_arenaroot = sva;
293 PL_sv_root = sva + 1;
295 svend = &sva[SvREFCNT(sva) - 1];
298 SvANY(sv) = (void *)(SV*)(sv + 1);
300 SvFLAGS(sv) = SVTYPEMASK;
304 SvFLAGS(sv) = SVTYPEMASK;
307 /* make some more SVs by adding another arena */
309 /* sv_mutex must be held while calling more_sv() */
316 sv_add_arena(PL_nice_chunk, PL_nice_chunk_size, 0);
317 PL_nice_chunk = Nullch;
318 PL_nice_chunk_size = 0;
321 char *chunk; /* must use New here to match call to */
322 New(704,chunk,1008,char); /* Safefree() in sv_free_arenas() */
323 sv_add_arena(chunk, 1008, 0);
329 /* visit(): call the named function for each non-free SV in the arenas
330 * whose flags field matches the flags/mask args. */
333 S_visit(pTHX_ SVFUNC_t f, U32 flags, U32 mask)
340 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
341 svend = &sva[SvREFCNT(sva)];
342 for (sv = sva + 1; sv < svend; ++sv) {
343 if (SvTYPE(sv) != SVTYPEMASK
344 && (sv->sv_flags & mask) == flags
357 /* called by sv_report_used() for each live SV */
360 do_report_used(pTHX_ SV *sv)
362 if (SvTYPE(sv) != SVTYPEMASK) {
363 PerlIO_printf(Perl_debug_log, "****\n");
370 =for apidoc sv_report_used
372 Dump the contents of all SVs not yet freed. (Debugging aid).
378 Perl_sv_report_used(pTHX)
381 visit(do_report_used, 0, 0);
385 /* called by sv_clean_objs() for each live SV */
388 do_clean_objs(pTHX_ SV *sv)
392 if (SvROK(sv) && SvOBJECT(rv = SvRV(sv))) {
393 DEBUG_D((PerlIO_printf(Perl_debug_log, "Cleaning object ref:\n "), sv_dump(sv)));
405 /* XXX Might want to check arrays, etc. */
408 /* called by sv_clean_objs() for each live SV */
410 #ifndef DISABLE_DESTRUCTOR_KLUDGE
412 do_clean_named_objs(pTHX_ SV *sv)
414 if (SvTYPE(sv) == SVt_PVGV && GvGP(sv)) {
415 if ( SvOBJECT(GvSV(sv)) ||
416 (GvAV(sv) && SvOBJECT(GvAV(sv))) ||
417 (GvHV(sv) && SvOBJECT(GvHV(sv))) ||
418 (GvIO(sv) && SvOBJECT(GvIO(sv))) ||
419 (GvCV(sv) && SvOBJECT(GvCV(sv))) )
421 DEBUG_D((PerlIO_printf(Perl_debug_log, "Cleaning named glob object:\n "), sv_dump(sv)));
422 SvFLAGS(sv) |= SVf_BREAK;
430 =for apidoc sv_clean_objs
432 Attempt to destroy all objects not yet freed
438 Perl_sv_clean_objs(pTHX)
440 PL_in_clean_objs = TRUE;
441 visit(do_clean_objs, SVf_ROK, SVf_ROK);
442 #ifndef DISABLE_DESTRUCTOR_KLUDGE
443 /* some barnacles may yet remain, clinging to typeglobs */
444 visit(do_clean_named_objs, SVt_PVGV, SVTYPEMASK);
446 PL_in_clean_objs = FALSE;
449 /* called by sv_clean_all() for each live SV */
452 do_clean_all(pTHX_ SV *sv)
454 DEBUG_D((PerlIO_printf(Perl_debug_log, "Cleaning loops: SV at 0x%"UVxf"\n", PTR2UV(sv)) ));
455 SvFLAGS(sv) |= SVf_BREAK;
456 if (PL_comppad == (AV*)sv) {
458 PL_curpad = Null(SV**);
464 =for apidoc sv_clean_all
466 Decrement the refcnt of each remaining SV, possibly triggering a
467 cleanup. This function may have to be called multiple times to free
468 SVs which are in complex self-referential hierarchies.
474 Perl_sv_clean_all(pTHX)
477 PL_in_clean_all = TRUE;
478 cleaned = visit(do_clean_all, 0,0);
479 PL_in_clean_all = FALSE;
484 =for apidoc sv_free_arenas
486 Deallocate the memory used by all arenas. Note that all the individual SV
487 heads and bodies within the arenas must already have been freed.
493 Perl_sv_free_arenas(pTHX)
497 XPV *arena, *arenanext;
499 /* Free arenas here, but be careful about fake ones. (We assume
500 contiguity of the fake ones with the corresponding real ones.) */
502 for (sva = PL_sv_arenaroot; sva; sva = svanext) {
503 svanext = (SV*) SvANY(sva);
504 while (svanext && SvFAKE(svanext))
505 svanext = (SV*) SvANY(svanext);
508 Safefree((void *)sva);
511 for (arena = PL_xiv_arenaroot; arena; arena = arenanext) {
512 arenanext = (XPV*)arena->xpv_pv;
515 PL_xiv_arenaroot = 0;
518 for (arena = PL_xnv_arenaroot; arena; arena = arenanext) {
519 arenanext = (XPV*)arena->xpv_pv;
522 PL_xnv_arenaroot = 0;
525 for (arena = PL_xrv_arenaroot; arena; arena = arenanext) {
526 arenanext = (XPV*)arena->xpv_pv;
529 PL_xrv_arenaroot = 0;
532 for (arena = PL_xpv_arenaroot; arena; arena = arenanext) {
533 arenanext = (XPV*)arena->xpv_pv;
536 PL_xpv_arenaroot = 0;
539 for (arena = (XPV*)PL_xpviv_arenaroot; arena; arena = arenanext) {
540 arenanext = (XPV*)arena->xpv_pv;
543 PL_xpviv_arenaroot = 0;
546 for (arena = (XPV*)PL_xpvnv_arenaroot; arena; arena = arenanext) {
547 arenanext = (XPV*)arena->xpv_pv;
550 PL_xpvnv_arenaroot = 0;
553 for (arena = (XPV*)PL_xpvcv_arenaroot; arena; arena = arenanext) {
554 arenanext = (XPV*)arena->xpv_pv;
557 PL_xpvcv_arenaroot = 0;
560 for (arena = (XPV*)PL_xpvav_arenaroot; arena; arena = arenanext) {
561 arenanext = (XPV*)arena->xpv_pv;
564 PL_xpvav_arenaroot = 0;
567 for (arena = (XPV*)PL_xpvhv_arenaroot; arena; arena = arenanext) {
568 arenanext = (XPV*)arena->xpv_pv;
571 PL_xpvhv_arenaroot = 0;
574 for (arena = (XPV*)PL_xpvmg_arenaroot; arena; arena = arenanext) {
575 arenanext = (XPV*)arena->xpv_pv;
578 PL_xpvmg_arenaroot = 0;
581 for (arena = (XPV*)PL_xpvlv_arenaroot; arena; arena = arenanext) {
582 arenanext = (XPV*)arena->xpv_pv;
585 PL_xpvlv_arenaroot = 0;
588 for (arena = (XPV*)PL_xpvbm_arenaroot; arena; arena = arenanext) {
589 arenanext = (XPV*)arena->xpv_pv;
592 PL_xpvbm_arenaroot = 0;
595 for (arena = (XPV*)PL_he_arenaroot; arena; arena = arenanext) {
596 arenanext = (XPV*)arena->xpv_pv;
603 Safefree(PL_nice_chunk);
604 PL_nice_chunk = Nullch;
605 PL_nice_chunk_size = 0;
610 /* ---------------------------------------------------------------------
612 * support functions for report_uninit()
615 /* the maxiumum size of array or hash where we will scan looking
616 * for the undefined element that triggered the warning */
618 #define FUV_MAX_SEARCH_SIZE 1000
620 /* Look for an entry in the hash whose value has the same SV as val;
621 * If so, return a mortal copy of the key. */
624 S_find_hash_subscript(pTHX_ HV *hv, SV* val)
630 if (!hv || SvMAGICAL(hv) || !HvARRAY(hv) ||
631 (HvTOTALKEYS(hv) > FUV_MAX_SEARCH_SIZE))
636 for (i=HvMAX(hv); i>0; i--) {
637 for (entry = array[i]; entry; entry = HeNEXT(entry)) {
638 if (HeVAL(entry) != val)
640 if ( HeVAL(entry) == &PL_sv_undef ||
641 HeVAL(entry) == &PL_sv_placeholder)
645 if (HeKLEN(entry) == HEf_SVKEY)
646 return sv_mortalcopy(HeKEY_sv(entry));
647 return sv_2mortal(newSVpvn(HeKEY(entry), HeKLEN(entry)));
653 /* Look for an entry in the array whose value has the same SV as val;
654 * If so, return the index, otherwise return -1. */
657 S_find_array_subscript(pTHX_ AV *av, SV* val)
661 if (!av || SvMAGICAL(av) || !AvARRAY(av) ||
662 (AvFILLp(av) > FUV_MAX_SEARCH_SIZE))
666 for (i=AvFILLp(av); i>=0; i--) {
667 if (svp[i] == val && svp[i] != &PL_sv_undef)
673 /* S_varname(): return the name of a variable, optionally with a subscript.
674 * If gv is non-zero, use the name of that global, along with gvtype (one
675 * of "$", "@", "%"); otherwise use the name of the lexical at pad offset
676 * targ. Depending on the value of the subscript_type flag, return:
679 #define FUV_SUBSCRIPT_NONE 1 /* "@foo" */
680 #define FUV_SUBSCRIPT_ARRAY 2 /* "$foo[aindex]" */
681 #define FUV_SUBSCRIPT_HASH 3 /* "$foo{keyname}" */
682 #define FUV_SUBSCRIPT_WITHIN 4 /* "within @foo" */
685 S_varname(pTHX_ GV *gv, char *gvtype, PADOFFSET targ,
686 SV* keyname, I32 aindex, int subscript_type)
692 name = sv_newmortal();
695 /* simulate gv_fullname4(), but add literal '^' for $^FOO names
696 * XXX get rid of all this if gv_fullnameX() ever supports this
700 HV *hv = GvSTASH(gv);
701 sv_setpv(name, gvtype);
704 else if (!HvNAME(hv))
708 if (strNE(p, "main")) {
710 sv_catpvn(name,"::", 2);
712 if (GvNAMELEN(gv)>= 1 &&
713 ((unsigned int)*GvNAME(gv)) <= 26)
715 Perl_sv_catpvf(aTHX_ name,"^%c", *GvNAME(gv) + 'A' - 1);
716 sv_catpvn(name,GvNAME(gv)+1,GvNAMELEN(gv)-1);
719 sv_catpvn(name,GvNAME(gv),GvNAMELEN(gv));
723 CV *cv = find_runcv(&u);
724 if (!cv || !CvPADLIST(cv))
726 av = (AV*)(*av_fetch(CvPADLIST(cv), 0, FALSE));
727 sv = *av_fetch(av, targ, FALSE);
728 /* SvLEN in a pad name is not to be trusted */
729 sv_setpv(name, SvPV_nolen(sv));
732 if (subscript_type == FUV_SUBSCRIPT_HASH) {
735 Perl_sv_catpvf(aTHX_ name, "{%s}",
736 pv_display(sv,SvPVX(keyname), SvCUR(keyname), 0, 32));
739 else if (subscript_type == FUV_SUBSCRIPT_ARRAY) {
741 Perl_sv_catpvf(aTHX_ name, "[%"IVdf"]", (IV)aindex);
743 else if (subscript_type == FUV_SUBSCRIPT_WITHIN)
744 sv_insert(name, 0, 0, "within ", 7);
751 =for apidoc find_uninit_var
753 Find the name of the undefined variable (if any) that caused the operator o
754 to issue a "Use of uninitialized value" warning.
755 If match is true, only return a name if it's value matches uninit_sv.
756 So roughly speaking, if a unary operator (such as OP_COS) generates a
757 warning, then following the direct child of the op may yield an
758 OP_PADSV or OP_GV that gives the name of the undefined variable. On the
759 other hand, with OP_ADD there are two branches to follow, so we only print
760 the variable name if we get an exact match.
762 The name is returned as a mortal SV.
764 Assumes that PL_op is the op that originally triggered the error, and that
765 PL_comppad/PL_curpad points to the currently executing pad.
771 S_find_uninit_var(pTHX_ OP* obase, SV* uninit_sv, bool match)
779 if (!obase || (match && (!uninit_sv || uninit_sv == &PL_sv_undef ||
780 uninit_sv == &PL_sv_placeholder)))
783 switch (obase->op_type) {
790 bool pad = (obase->op_type == OP_PADAV || obase->op_type == OP_PADHV);
791 bool hash = (obase->op_type == OP_PADHV || obase->op_type == OP_RV2HV);
794 int subscript_type = FUV_SUBSCRIPT_WITHIN;
796 if (pad) { /* @lex, %lex */
797 sv = PAD_SVl(obase->op_targ);
801 if (cUNOPx(obase)->op_first->op_type == OP_GV) {
802 /* @global, %global */
803 gv = cGVOPx_gv(cUNOPx(obase)->op_first);
806 sv = hash ? (SV*)GvHV(gv): (SV*)GvAV(gv);
808 else /* @{expr}, %{expr} */
809 return find_uninit_var(cUNOPx(obase)->op_first,
813 /* attempt to find a match within the aggregate */
815 keysv = S_find_hash_subscript(aTHX_ (HV*)sv, uninit_sv);
817 subscript_type = FUV_SUBSCRIPT_HASH;
820 index = S_find_array_subscript(aTHX_ (AV*)sv, uninit_sv);
822 subscript_type = FUV_SUBSCRIPT_ARRAY;
825 if (match && subscript_type == FUV_SUBSCRIPT_WITHIN)
828 return S_varname(aTHX_ gv, hash ? "%" : "@", obase->op_targ,
829 keysv, index, subscript_type);
833 if (match && PAD_SVl(obase->op_targ) != uninit_sv)
835 return S_varname(aTHX_ Nullgv, "$", obase->op_targ,
836 Nullsv, 0, FUV_SUBSCRIPT_NONE);
839 gv = cGVOPx_gv(obase);
840 if (!gv || (match && GvSV(gv) != uninit_sv))
842 return S_varname(aTHX_ gv, "$", 0, Nullsv, 0, FUV_SUBSCRIPT_NONE);
845 if (obase->op_flags & OPf_SPECIAL) { /* lexical array */
847 av = (AV*)PAD_SV(obase->op_targ);
848 if (!av || SvRMAGICAL(av))
850 svp = av_fetch(av, (I32)obase->op_private, FALSE);
851 if (!svp || *svp != uninit_sv)
854 return S_varname(aTHX_ Nullgv, "$", obase->op_targ,
855 Nullsv, (I32)obase->op_private, FUV_SUBSCRIPT_ARRAY);
858 gv = cGVOPx_gv(obase);
863 if (!av || SvRMAGICAL(av))
865 svp = av_fetch(av, (I32)obase->op_private, FALSE);
866 if (!svp || *svp != uninit_sv)
869 return S_varname(aTHX_ gv, "$", 0,
870 Nullsv, (I32)obase->op_private, FUV_SUBSCRIPT_ARRAY);
875 o = cUNOPx(obase)->op_first;
876 if (!o || o->op_type != OP_NULL ||
877 ! (o->op_targ == OP_AELEM || o->op_targ == OP_HELEM))
879 return find_uninit_var(cBINOPo->op_last, uninit_sv, match);
884 /* $a[uninit_expr] or $h{uninit_expr} */
885 return find_uninit_var(cBINOPx(obase)->op_last, uninit_sv, match);
888 o = cBINOPx(obase)->op_first;
889 kid = cBINOPx(obase)->op_last;
891 /* get the av or hv, and optionally the gv */
893 if (o->op_type == OP_PADAV || o->op_type == OP_PADHV) {
894 sv = PAD_SV(o->op_targ);
896 else if ((o->op_type == OP_RV2AV || o->op_type == OP_RV2HV)
897 && cUNOPo->op_first->op_type == OP_GV)
899 gv = cGVOPx_gv(cUNOPo->op_first);
902 sv = o->op_type == OP_RV2HV ? (SV*)GvHV(gv) : (SV*)GvAV(gv);
907 if (kid && kid->op_type == OP_CONST && SvOK(cSVOPx_sv(kid))) {
908 /* index is constant */
912 if (obase->op_type == OP_HELEM) {
913 HE* he = hv_fetch_ent((HV*)sv, cSVOPx_sv(kid), 0, 0);
914 if (!he || HeVAL(he) != uninit_sv)
918 svp = av_fetch((AV*)sv, SvIV(cSVOPx_sv(kid)), FALSE);
919 if (!svp || *svp != uninit_sv)
923 if (obase->op_type == OP_HELEM)
924 return S_varname(aTHX_ gv, "%", o->op_targ,
925 cSVOPx_sv(kid), 0, FUV_SUBSCRIPT_HASH);
927 return S_varname(aTHX_ gv, "@", o->op_targ, Nullsv,
928 SvIV(cSVOPx_sv(kid)), FUV_SUBSCRIPT_ARRAY);
932 /* index is an expression;
933 * attempt to find a match within the aggregate */
934 if (obase->op_type == OP_HELEM) {
935 SV *keysv = S_find_hash_subscript(aTHX_ (HV*)sv, uninit_sv);
937 return S_varname(aTHX_ gv, "%", o->op_targ,
938 keysv, 0, FUV_SUBSCRIPT_HASH);
941 I32 index = S_find_array_subscript(aTHX_ (AV*)sv, uninit_sv);
943 return S_varname(aTHX_ gv, "@", o->op_targ,
944 Nullsv, index, FUV_SUBSCRIPT_ARRAY);
948 return S_varname(aTHX_ gv,
949 (o->op_type == OP_PADAV || o->op_type == OP_RV2AV)
951 o->op_targ, Nullsv, 0, FUV_SUBSCRIPT_WITHIN);
957 /* only examine RHS */
958 return find_uninit_var(cBINOPx(obase)->op_first, uninit_sv, match);
961 o = cUNOPx(obase)->op_first;
962 if (o->op_type == OP_PUSHMARK)
965 if (!o->op_sibling) {
966 /* one-arg version of open is highly magical */
968 if (o->op_type == OP_GV) { /* open FOO; */
970 if (match && GvSV(gv) != uninit_sv)
972 return S_varname(aTHX_ gv, "$", 0,
973 Nullsv, 0, FUV_SUBSCRIPT_NONE);
975 /* other possibilities not handled are:
976 * open $x; or open my $x; should return '${*$x}'
977 * open expr; should return '$'.expr ideally
983 /* ops where $_ may be an implicit arg */
987 if ( !(obase->op_flags & OPf_STACKED)) {
988 if (uninit_sv == ((obase->op_private & OPpTARGET_MY)
989 ? PAD_SVl(obase->op_targ)
1001 /* skip filehandle as it can't produce 'undef' warning */
1002 o = cUNOPx(obase)->op_first;
1003 if ((obase->op_flags & OPf_STACKED) && o->op_type == OP_PUSHMARK)
1004 o = o->op_sibling->op_sibling;
1011 match = 1; /* XS or custom code could trigger random warnings */
1016 if (SvROK(PL_rs) && uninit_sv == SvRV(PL_rs))
1017 return sv_2mortal(newSVpv("${$/}", 0));
1022 if (!(obase->op_flags & OPf_KIDS))
1024 o = cUNOPx(obase)->op_first;
1030 /* if all except one arg are constant, or have no side-effects,
1031 * or are optimized away, then it's unambiguous */
1033 for (kid=o; kid; kid = kid->op_sibling) {
1035 ( (kid->op_type == OP_CONST && SvOK(cSVOPx_sv(kid)))
1036 || (kid->op_type == OP_NULL && ! (kid->op_flags & OPf_KIDS))
1037 || (kid->op_type == OP_PUSHMARK)
1041 if (o2) { /* more than one found */
1048 return find_uninit_var(o2, uninit_sv, match);
1052 sv = find_uninit_var(o, uninit_sv, 1);
1064 =for apidoc report_uninit
1066 Print appropriate "Use of uninitialized variable" warning
1072 Perl_report_uninit(pTHX_ SV* uninit_sv)
1075 SV* varname = Nullsv;
1077 varname = find_uninit_var(PL_op, uninit_sv,0);
1079 sv_insert(varname, 0, 0, " ", 1);
1081 Perl_warner(aTHX_ packWARN(WARN_UNINITIALIZED), PL_warn_uninit,
1082 varname ? SvPV_nolen(varname) : "",
1083 " in ", OP_DESC(PL_op));
1086 Perl_warner(aTHX_ packWARN(WARN_UNINITIALIZED), PL_warn_uninit,
1090 /* grab a new IV body from the free list, allocating more if necessary */
1101 * See comment in more_xiv() -- RAM.
1103 PL_xiv_root = *(IV**)xiv;
1105 return (XPVIV*)((char*)xiv - STRUCT_OFFSET(XPVIV, xiv_iv));
1108 /* return an IV body to the free list */
1111 S_del_xiv(pTHX_ XPVIV *p)
1113 IV* xiv = (IV*)((char*)(p) + STRUCT_OFFSET(XPVIV, xiv_iv));
1115 *(IV**)xiv = PL_xiv_root;
1120 /* allocate another arena's worth of IV bodies */
1126 register IV* xivend;
1128 New(705, ptr, 1008/sizeof(XPV), XPV);
1129 ptr->xpv_pv = (char*)PL_xiv_arenaroot; /* linked list of xiv arenas */
1130 PL_xiv_arenaroot = ptr; /* to keep Purify happy */
1133 xivend = &xiv[1008 / sizeof(IV) - 1];
1134 xiv += (sizeof(XPV) - 1) / sizeof(IV) + 1; /* fudge by size of XPV */
1136 while (xiv < xivend) {
1137 *(IV**)xiv = (IV *)(xiv + 1);
1143 /* grab a new NV body from the free list, allocating more if necessary */
1153 PL_xnv_root = *(NV**)xnv;
1155 return (XPVNV*)((char*)xnv - STRUCT_OFFSET(XPVNV, xnv_nv));
1158 /* return an NV body to the free list */
1161 S_del_xnv(pTHX_ XPVNV *p)
1163 NV* xnv = (NV*)((char*)(p) + STRUCT_OFFSET(XPVNV, xnv_nv));
1165 *(NV**)xnv = PL_xnv_root;
1170 /* allocate another arena's worth of NV bodies */
1176 register NV* xnvend;
1178 New(711, ptr, 1008/sizeof(XPV), XPV);
1179 ptr->xpv_pv = (char*)PL_xnv_arenaroot;
1180 PL_xnv_arenaroot = ptr;
1183 xnvend = &xnv[1008 / sizeof(NV) - 1];
1184 xnv += (sizeof(XPVIV) - 1) / sizeof(NV) + 1; /* fudge by sizeof XPVIV */
1186 while (xnv < xnvend) {
1187 *(NV**)xnv = (NV*)(xnv + 1);
1193 /* grab a new struct xrv from the free list, allocating more if necessary */
1203 PL_xrv_root = (XRV*)xrv->xrv_rv;
1208 /* return a struct xrv to the free list */
1211 S_del_xrv(pTHX_ XRV *p)
1214 p->xrv_rv = (SV*)PL_xrv_root;
1219 /* allocate another arena's worth of struct xrv */
1225 register XRV* xrvend;
1227 New(712, ptr, 1008/sizeof(XPV), XPV);
1228 ptr->xpv_pv = (char*)PL_xrv_arenaroot;
1229 PL_xrv_arenaroot = ptr;
1232 xrvend = &xrv[1008 / sizeof(XRV) - 1];
1233 xrv += (sizeof(XPV) - 1) / sizeof(XRV) + 1;
1235 while (xrv < xrvend) {
1236 xrv->xrv_rv = (SV*)(xrv + 1);
1242 /* grab a new struct xpv from the free list, allocating more if necessary */
1252 PL_xpv_root = (XPV*)xpv->xpv_pv;
1257 /* return a struct xpv to the free list */
1260 S_del_xpv(pTHX_ XPV *p)
1263 p->xpv_pv = (char*)PL_xpv_root;
1268 /* allocate another arena's worth of struct xpv */
1274 register XPV* xpvend;
1275 New(713, xpv, 1008/sizeof(XPV), XPV);
1276 xpv->xpv_pv = (char*)PL_xpv_arenaroot;
1277 PL_xpv_arenaroot = xpv;
1279 xpvend = &xpv[1008 / sizeof(XPV) - 1];
1280 PL_xpv_root = ++xpv;
1281 while (xpv < xpvend) {
1282 xpv->xpv_pv = (char*)(xpv + 1);
1288 /* grab a new struct xpviv from the free list, allocating more if necessary */
1297 xpviv = PL_xpviv_root;
1298 PL_xpviv_root = (XPVIV*)xpviv->xpv_pv;
1303 /* return a struct xpviv to the free list */
1306 S_del_xpviv(pTHX_ XPVIV *p)
1309 p->xpv_pv = (char*)PL_xpviv_root;
1314 /* allocate another arena's worth of struct xpviv */
1319 register XPVIV* xpviv;
1320 register XPVIV* xpvivend;
1321 New(714, xpviv, 1008/sizeof(XPVIV), XPVIV);
1322 xpviv->xpv_pv = (char*)PL_xpviv_arenaroot;
1323 PL_xpviv_arenaroot = xpviv;
1325 xpvivend = &xpviv[1008 / sizeof(XPVIV) - 1];
1326 PL_xpviv_root = ++xpviv;
1327 while (xpviv < xpvivend) {
1328 xpviv->xpv_pv = (char*)(xpviv + 1);
1334 /* grab a new struct xpvnv from the free list, allocating more if necessary */
1343 xpvnv = PL_xpvnv_root;
1344 PL_xpvnv_root = (XPVNV*)xpvnv->xpv_pv;
1349 /* return a struct xpvnv to the free list */
1352 S_del_xpvnv(pTHX_ XPVNV *p)
1355 p->xpv_pv = (char*)PL_xpvnv_root;
1360 /* allocate another arena's worth of struct xpvnv */
1365 register XPVNV* xpvnv;
1366 register XPVNV* xpvnvend;
1367 New(715, xpvnv, 1008/sizeof(XPVNV), XPVNV);
1368 xpvnv->xpv_pv = (char*)PL_xpvnv_arenaroot;
1369 PL_xpvnv_arenaroot = xpvnv;
1371 xpvnvend = &xpvnv[1008 / sizeof(XPVNV) - 1];
1372 PL_xpvnv_root = ++xpvnv;
1373 while (xpvnv < xpvnvend) {
1374 xpvnv->xpv_pv = (char*)(xpvnv + 1);
1380 /* grab a new struct xpvcv from the free list, allocating more if necessary */
1389 xpvcv = PL_xpvcv_root;
1390 PL_xpvcv_root = (XPVCV*)xpvcv->xpv_pv;
1395 /* return a struct xpvcv to the free list */
1398 S_del_xpvcv(pTHX_ XPVCV *p)
1401 p->xpv_pv = (char*)PL_xpvcv_root;
1406 /* allocate another arena's worth of struct xpvcv */
1411 register XPVCV* xpvcv;
1412 register XPVCV* xpvcvend;
1413 New(716, xpvcv, 1008/sizeof(XPVCV), XPVCV);
1414 xpvcv->xpv_pv = (char*)PL_xpvcv_arenaroot;
1415 PL_xpvcv_arenaroot = xpvcv;
1417 xpvcvend = &xpvcv[1008 / sizeof(XPVCV) - 1];
1418 PL_xpvcv_root = ++xpvcv;
1419 while (xpvcv < xpvcvend) {
1420 xpvcv->xpv_pv = (char*)(xpvcv + 1);
1426 /* grab a new struct xpvav from the free list, allocating more if necessary */
1435 xpvav = PL_xpvav_root;
1436 PL_xpvav_root = (XPVAV*)xpvav->xav_array;
1441 /* return a struct xpvav to the free list */
1444 S_del_xpvav(pTHX_ XPVAV *p)
1447 p->xav_array = (char*)PL_xpvav_root;
1452 /* allocate another arena's worth of struct xpvav */
1457 register XPVAV* xpvav;
1458 register XPVAV* xpvavend;
1459 New(717, xpvav, 1008/sizeof(XPVAV), XPVAV);
1460 xpvav->xav_array = (char*)PL_xpvav_arenaroot;
1461 PL_xpvav_arenaroot = xpvav;
1463 xpvavend = &xpvav[1008 / sizeof(XPVAV) - 1];
1464 PL_xpvav_root = ++xpvav;
1465 while (xpvav < xpvavend) {
1466 xpvav->xav_array = (char*)(xpvav + 1);
1469 xpvav->xav_array = 0;
1472 /* grab a new struct xpvhv from the free list, allocating more if necessary */
1481 xpvhv = PL_xpvhv_root;
1482 PL_xpvhv_root = (XPVHV*)xpvhv->xhv_array;
1487 /* return a struct xpvhv to the free list */
1490 S_del_xpvhv(pTHX_ XPVHV *p)
1493 p->xhv_array = (char*)PL_xpvhv_root;
1498 /* allocate another arena's worth of struct xpvhv */
1503 register XPVHV* xpvhv;
1504 register XPVHV* xpvhvend;
1505 New(718, xpvhv, 1008/sizeof(XPVHV), XPVHV);
1506 xpvhv->xhv_array = (char*)PL_xpvhv_arenaroot;
1507 PL_xpvhv_arenaroot = xpvhv;
1509 xpvhvend = &xpvhv[1008 / sizeof(XPVHV) - 1];
1510 PL_xpvhv_root = ++xpvhv;
1511 while (xpvhv < xpvhvend) {
1512 xpvhv->xhv_array = (char*)(xpvhv + 1);
1515 xpvhv->xhv_array = 0;
1518 /* grab a new struct xpvmg from the free list, allocating more if necessary */
1527 xpvmg = PL_xpvmg_root;
1528 PL_xpvmg_root = (XPVMG*)xpvmg->xpv_pv;
1533 /* return a struct xpvmg to the free list */
1536 S_del_xpvmg(pTHX_ XPVMG *p)
1539 p->xpv_pv = (char*)PL_xpvmg_root;
1544 /* allocate another arena's worth of struct xpvmg */
1549 register XPVMG* xpvmg;
1550 register XPVMG* xpvmgend;
1551 New(719, xpvmg, 1008/sizeof(XPVMG), XPVMG);
1552 xpvmg->xpv_pv = (char*)PL_xpvmg_arenaroot;
1553 PL_xpvmg_arenaroot = xpvmg;
1555 xpvmgend = &xpvmg[1008 / sizeof(XPVMG) - 1];
1556 PL_xpvmg_root = ++xpvmg;
1557 while (xpvmg < xpvmgend) {
1558 xpvmg->xpv_pv = (char*)(xpvmg + 1);
1564 /* grab a new struct xpvlv from the free list, allocating more if necessary */
1573 xpvlv = PL_xpvlv_root;
1574 PL_xpvlv_root = (XPVLV*)xpvlv->xpv_pv;
1579 /* return a struct xpvlv to the free list */
1582 S_del_xpvlv(pTHX_ XPVLV *p)
1585 p->xpv_pv = (char*)PL_xpvlv_root;
1590 /* allocate another arena's worth of struct xpvlv */
1595 register XPVLV* xpvlv;
1596 register XPVLV* xpvlvend;
1597 New(720, xpvlv, 1008/sizeof(XPVLV), XPVLV);
1598 xpvlv->xpv_pv = (char*)PL_xpvlv_arenaroot;
1599 PL_xpvlv_arenaroot = xpvlv;
1601 xpvlvend = &xpvlv[1008 / sizeof(XPVLV) - 1];
1602 PL_xpvlv_root = ++xpvlv;
1603 while (xpvlv < xpvlvend) {
1604 xpvlv->xpv_pv = (char*)(xpvlv + 1);
1610 /* grab a new struct xpvbm from the free list, allocating more if necessary */
1619 xpvbm = PL_xpvbm_root;
1620 PL_xpvbm_root = (XPVBM*)xpvbm->xpv_pv;
1625 /* return a struct xpvbm to the free list */
1628 S_del_xpvbm(pTHX_ XPVBM *p)
1631 p->xpv_pv = (char*)PL_xpvbm_root;
1636 /* allocate another arena's worth of struct xpvbm */
1641 register XPVBM* xpvbm;
1642 register XPVBM* xpvbmend;
1643 New(721, xpvbm, 1008/sizeof(XPVBM), XPVBM);
1644 xpvbm->xpv_pv = (char*)PL_xpvbm_arenaroot;
1645 PL_xpvbm_arenaroot = xpvbm;
1647 xpvbmend = &xpvbm[1008 / sizeof(XPVBM) - 1];
1648 PL_xpvbm_root = ++xpvbm;
1649 while (xpvbm < xpvbmend) {
1650 xpvbm->xpv_pv = (char*)(xpvbm + 1);
1656 #define my_safemalloc(s) (void*)safemalloc(s)
1657 #define my_safefree(p) safefree((char*)p)
1661 #define new_XIV() my_safemalloc(sizeof(XPVIV))
1662 #define del_XIV(p) my_safefree(p)
1664 #define new_XNV() my_safemalloc(sizeof(XPVNV))
1665 #define del_XNV(p) my_safefree(p)
1667 #define new_XRV() my_safemalloc(sizeof(XRV))
1668 #define del_XRV(p) my_safefree(p)
1670 #define new_XPV() my_safemalloc(sizeof(XPV))
1671 #define del_XPV(p) my_safefree(p)
1673 #define new_XPVIV() my_safemalloc(sizeof(XPVIV))
1674 #define del_XPVIV(p) my_safefree(p)
1676 #define new_XPVNV() my_safemalloc(sizeof(XPVNV))
1677 #define del_XPVNV(p) my_safefree(p)
1679 #define new_XPVCV() my_safemalloc(sizeof(XPVCV))
1680 #define del_XPVCV(p) my_safefree(p)
1682 #define new_XPVAV() my_safemalloc(sizeof(XPVAV))
1683 #define del_XPVAV(p) my_safefree(p)
1685 #define new_XPVHV() my_safemalloc(sizeof(XPVHV))
1686 #define del_XPVHV(p) my_safefree(p)
1688 #define new_XPVMG() my_safemalloc(sizeof(XPVMG))
1689 #define del_XPVMG(p) my_safefree(p)
1691 #define new_XPVLV() my_safemalloc(sizeof(XPVLV))
1692 #define del_XPVLV(p) my_safefree(p)
1694 #define new_XPVBM() my_safemalloc(sizeof(XPVBM))
1695 #define del_XPVBM(p) my_safefree(p)
1699 #define new_XIV() (void*)new_xiv()
1700 #define del_XIV(p) del_xiv((XPVIV*) p)
1702 #define new_XNV() (void*)new_xnv()
1703 #define del_XNV(p) del_xnv((XPVNV*) p)
1705 #define new_XRV() (void*)new_xrv()
1706 #define del_XRV(p) del_xrv((XRV*) p)
1708 #define new_XPV() (void*)new_xpv()
1709 #define del_XPV(p) del_xpv((XPV *)p)
1711 #define new_XPVIV() (void*)new_xpviv()
1712 #define del_XPVIV(p) del_xpviv((XPVIV *)p)
1714 #define new_XPVNV() (void*)new_xpvnv()
1715 #define del_XPVNV(p) del_xpvnv((XPVNV *)p)
1717 #define new_XPVCV() (void*)new_xpvcv()
1718 #define del_XPVCV(p) del_xpvcv((XPVCV *)p)
1720 #define new_XPVAV() (void*)new_xpvav()
1721 #define del_XPVAV(p) del_xpvav((XPVAV *)p)
1723 #define new_XPVHV() (void*)new_xpvhv()
1724 #define del_XPVHV(p) del_xpvhv((XPVHV *)p)
1726 #define new_XPVMG() (void*)new_xpvmg()
1727 #define del_XPVMG(p) del_xpvmg((XPVMG *)p)
1729 #define new_XPVLV() (void*)new_xpvlv()
1730 #define del_XPVLV(p) del_xpvlv((XPVLV *)p)
1732 #define new_XPVBM() (void*)new_xpvbm()
1733 #define del_XPVBM(p) del_xpvbm((XPVBM *)p)
1737 #define new_XPVGV() my_safemalloc(sizeof(XPVGV))
1738 #define del_XPVGV(p) my_safefree(p)
1740 #define new_XPVFM() my_safemalloc(sizeof(XPVFM))
1741 #define del_XPVFM(p) my_safefree(p)
1743 #define new_XPVIO() my_safemalloc(sizeof(XPVIO))
1744 #define del_XPVIO(p) my_safefree(p)
1747 =for apidoc sv_upgrade
1749 Upgrade an SV to a more complex form. Generally adds a new body type to the
1750 SV, then copies across as much information as possible from the old body.
1751 You generally want to use the C<SvUPGRADE> macro wrapper. See also C<svtype>.
1757 Perl_sv_upgrade(pTHX_ register SV *sv, U32 mt)
1765 MAGIC* magic = NULL;
1768 if (mt != SVt_PV && SvIsCOW(sv)) {
1769 sv_force_normal_flags(sv, 0);
1772 if (SvTYPE(sv) == mt)
1776 (void)SvOOK_off(sv);
1778 switch (SvTYPE(sv)) {
1799 else if (mt < SVt_PVIV)
1816 pv = (char*)SvRV(sv);
1836 else if (mt == SVt_NV)
1847 del_XPVIV(SvANY(sv));
1857 del_XPVNV(SvANY(sv));
1865 magic = SvMAGIC(sv);
1866 stash = SvSTASH(sv);
1867 del_XPVMG(SvANY(sv));
1870 Perl_croak(aTHX_ "Can't upgrade that kind of scalar");
1873 SvFLAGS(sv) &= ~SVTYPEMASK;
1878 Perl_croak(aTHX_ "Can't upgrade to undef");
1880 SvANY(sv) = new_XIV();
1884 SvANY(sv) = new_XNV();
1888 SvANY(sv) = new_XRV();
1892 SvANY(sv) = new_XPV();
1898 SvANY(sv) = new_XPVIV();
1908 SvANY(sv) = new_XPVNV();
1916 SvANY(sv) = new_XPVMG();
1922 SvMAGIC(sv) = magic;
1923 SvSTASH(sv) = stash;
1926 SvANY(sv) = new_XPVLV();
1932 SvMAGIC(sv) = magic;
1933 SvSTASH(sv) = stash;
1945 SvANY(sv) = new_XPVAV();
1953 SvMAGIC(sv) = magic;
1954 SvSTASH(sv) = stash;
1957 AvFLAGS(sv) = AVf_REAL;
1960 SvANY(sv) = new_XPVHV();
1966 HvTOTALKEYS(sv) = 0;
1967 HvPLACEHOLDERS(sv) = 0;
1968 SvMAGIC(sv) = magic;
1969 SvSTASH(sv) = stash;
1976 SvANY(sv) = new_XPVCV();
1977 Zero(SvANY(sv), 1, XPVCV);
1983 SvMAGIC(sv) = magic;
1984 SvSTASH(sv) = stash;
1987 SvANY(sv) = new_XPVGV();
1993 SvMAGIC(sv) = magic;
1994 SvSTASH(sv) = stash;
2002 SvANY(sv) = new_XPVBM();
2008 SvMAGIC(sv) = magic;
2009 SvSTASH(sv) = stash;
2015 SvANY(sv) = new_XPVFM();
2016 Zero(SvANY(sv), 1, XPVFM);
2022 SvMAGIC(sv) = magic;
2023 SvSTASH(sv) = stash;
2026 SvANY(sv) = new_XPVIO();
2027 Zero(SvANY(sv), 1, XPVIO);
2033 SvMAGIC(sv) = magic;
2034 SvSTASH(sv) = stash;
2035 IoPAGE_LEN(sv) = 60;
2042 =for apidoc sv_backoff
2044 Remove any string offset. You should normally use the C<SvOOK_off> macro
2051 Perl_sv_backoff(pTHX_ register SV *sv)
2055 char *s = SvPVX(sv);
2056 SvLEN(sv) += SvIVX(sv);
2057 SvPVX(sv) -= SvIVX(sv);
2059 Move(s, SvPVX(sv), SvCUR(sv)+1, char);
2061 SvFLAGS(sv) &= ~SVf_OOK;
2068 Expands the character buffer in the SV. If necessary, uses C<sv_unref> and
2069 upgrades the SV to C<SVt_PV>. Returns a pointer to the character buffer.
2070 Use the C<SvGROW> wrapper instead.
2076 Perl_sv_grow(pTHX_ register SV *sv, register STRLEN newlen)
2080 #ifdef HAS_64K_LIMIT
2081 if (newlen >= 0x10000) {
2082 PerlIO_printf(Perl_debug_log,
2083 "Allocation too large: %"UVxf"\n", (UV)newlen);
2086 #endif /* HAS_64K_LIMIT */
2089 if (SvTYPE(sv) < SVt_PV) {
2090 sv_upgrade(sv, SVt_PV);
2093 else if (SvOOK(sv)) { /* pv is offset? */
2096 if (newlen > SvLEN(sv))
2097 newlen += 10 * (newlen - SvCUR(sv)); /* avoid copy each time */
2098 #ifdef HAS_64K_LIMIT
2099 if (newlen >= 0x10000)
2106 if (newlen > SvLEN(sv)) { /* need more room? */
2107 if (SvLEN(sv) && s) {
2109 STRLEN l = malloced_size((void*)SvPVX(sv));
2115 Renew(s,newlen,char);
2118 New(703, s, newlen, char);
2119 if (SvPVX(sv) && SvCUR(sv)) {
2120 Move(SvPVX(sv), s, (newlen < SvCUR(sv)) ? newlen : SvCUR(sv), char);
2124 SvLEN_set(sv, newlen);
2130 =for apidoc sv_setiv
2132 Copies an integer into the given SV, upgrading first if necessary.
2133 Does not handle 'set' magic. See also C<sv_setiv_mg>.
2139 Perl_sv_setiv(pTHX_ register SV *sv, IV i)
2141 SV_CHECK_THINKFIRST_COW_DROP(sv);
2142 switch (SvTYPE(sv)) {
2144 sv_upgrade(sv, SVt_IV);
2147 sv_upgrade(sv, SVt_PVNV);
2151 sv_upgrade(sv, SVt_PVIV);
2160 Perl_croak(aTHX_ "Can't coerce %s to integer in %s", sv_reftype(sv,0),
2163 (void)SvIOK_only(sv); /* validate number */
2169 =for apidoc sv_setiv_mg
2171 Like C<sv_setiv>, but also handles 'set' magic.
2177 Perl_sv_setiv_mg(pTHX_ register SV *sv, IV i)
2184 =for apidoc sv_setuv
2186 Copies an unsigned integer into the given SV, upgrading first if necessary.
2187 Does not handle 'set' magic. See also C<sv_setuv_mg>.
2193 Perl_sv_setuv(pTHX_ register SV *sv, UV u)
2195 /* With these two if statements:
2196 u=1.49 s=0.52 cu=72.49 cs=10.64 scripts=270 tests=20865
2199 u=1.35 s=0.47 cu=73.45 cs=11.43 scripts=270 tests=20865
2201 If you wish to remove them, please benchmark to see what the effect is
2203 if (u <= (UV)IV_MAX) {
2204 sv_setiv(sv, (IV)u);
2213 =for apidoc sv_setuv_mg
2215 Like C<sv_setuv>, but also handles 'set' magic.
2221 Perl_sv_setuv_mg(pTHX_ register SV *sv, UV u)
2223 /* With these two if statements:
2224 u=1.49 s=0.52 cu=72.49 cs=10.64 scripts=270 tests=20865
2227 u=1.35 s=0.47 cu=73.45 cs=11.43 scripts=270 tests=20865
2229 If you wish to remove them, please benchmark to see what the effect is
2231 if (u <= (UV)IV_MAX) {
2232 sv_setiv(sv, (IV)u);
2242 =for apidoc sv_setnv
2244 Copies a double into the given SV, upgrading first if necessary.
2245 Does not handle 'set' magic. See also C<sv_setnv_mg>.
2251 Perl_sv_setnv(pTHX_ register SV *sv, NV num)
2253 SV_CHECK_THINKFIRST_COW_DROP(sv);
2254 switch (SvTYPE(sv)) {
2257 sv_upgrade(sv, SVt_NV);
2262 sv_upgrade(sv, SVt_PVNV);
2271 Perl_croak(aTHX_ "Can't coerce %s to number in %s", sv_reftype(sv,0),
2275 (void)SvNOK_only(sv); /* validate number */
2280 =for apidoc sv_setnv_mg
2282 Like C<sv_setnv>, but also handles 'set' magic.
2288 Perl_sv_setnv_mg(pTHX_ register SV *sv, NV num)
2294 /* Print an "isn't numeric" warning, using a cleaned-up,
2295 * printable version of the offending string
2299 S_not_a_number(pTHX_ SV *sv)
2306 dsv = sv_2mortal(newSVpv("", 0));
2307 pv = sv_uni_display(dsv, sv, 10, 0);
2310 char *limit = tmpbuf + sizeof(tmpbuf) - 8;
2311 /* each *s can expand to 4 chars + "...\0",
2312 i.e. need room for 8 chars */
2315 for (s = SvPVX(sv), end = s + SvCUR(sv); s < end && d < limit; s++) {
2317 if (ch & 128 && !isPRINT_LC(ch)) {
2326 else if (ch == '\r') {
2330 else if (ch == '\f') {
2334 else if (ch == '\\') {
2338 else if (ch == '\0') {
2342 else if (isPRINT_LC(ch))
2359 Perl_warner(aTHX_ packWARN(WARN_NUMERIC),
2360 "Argument \"%s\" isn't numeric in %s", pv,
2363 Perl_warner(aTHX_ packWARN(WARN_NUMERIC),
2364 "Argument \"%s\" isn't numeric", pv);
2368 =for apidoc looks_like_number
2370 Test if the content of an SV looks like a number (or is a number).
2371 C<Inf> and C<Infinity> are treated as numbers (so will not issue a
2372 non-numeric warning), even if your atof() doesn't grok them.
2378 Perl_looks_like_number(pTHX_ SV *sv)
2380 register char *sbegin;
2387 else if (SvPOKp(sv))
2388 sbegin = SvPV(sv, len);
2390 return SvFLAGS(sv) & (SVf_NOK|SVp_NOK|SVf_IOK|SVp_IOK);
2391 return grok_number(sbegin, len, NULL);
2394 /* Actually, ISO C leaves conversion of UV to IV undefined, but
2395 until proven guilty, assume that things are not that bad... */
2400 As 64 bit platforms often have an NV that doesn't preserve all bits of
2401 an IV (an assumption perl has been based on to date) it becomes necessary
2402 to remove the assumption that the NV always carries enough precision to
2403 recreate the IV whenever needed, and that the NV is the canonical form.
2404 Instead, IV/UV and NV need to be given equal rights. So as to not lose
2405 precision as a side effect of conversion (which would lead to insanity
2406 and the dragon(s) in t/op/numconvert.t getting very angry) the intent is
2407 1) to distinguish between IV/UV/NV slots that have cached a valid
2408 conversion where precision was lost and IV/UV/NV slots that have a
2409 valid conversion which has lost no precision
2410 2) to ensure that if a numeric conversion to one form is requested that
2411 would lose precision, the precise conversion (or differently
2412 imprecise conversion) is also performed and cached, to prevent
2413 requests for different numeric formats on the same SV causing
2414 lossy conversion chains. (lossless conversion chains are perfectly
2419 SvIOKp is true if the IV slot contains a valid value
2420 SvIOK is true only if the IV value is accurate (UV if SvIOK_UV true)
2421 SvNOKp is true if the NV slot contains a valid value
2422 SvNOK is true only if the NV value is accurate
2425 while converting from PV to NV, check to see if converting that NV to an
2426 IV(or UV) would lose accuracy over a direct conversion from PV to
2427 IV(or UV). If it would, cache both conversions, return NV, but mark
2428 SV as IOK NOKp (ie not NOK).
2430 While converting from PV to IV, check to see if converting that IV to an
2431 NV would lose accuracy over a direct conversion from PV to NV. If it
2432 would, cache both conversions, flag similarly.
2434 Before, the SV value "3.2" could become NV=3.2 IV=3 NOK, IOK quite
2435 correctly because if IV & NV were set NV *always* overruled.
2436 Now, "3.2" will become NV=3.2 IV=3 NOK, IOKp, because the flag's meaning
2437 changes - now IV and NV together means that the two are interchangeable:
2438 SvIVX == (IV) SvNVX && SvNVX == (NV) SvIVX;
2440 The benefit of this is that operations such as pp_add know that if
2441 SvIOK is true for both left and right operands, then integer addition
2442 can be used instead of floating point (for cases where the result won't
2443 overflow). Before, floating point was always used, which could lead to
2444 loss of precision compared with integer addition.
2446 * making IV and NV equal status should make maths accurate on 64 bit
2448 * may speed up maths somewhat if pp_add and friends start to use
2449 integers when possible instead of fp. (Hopefully the overhead in
2450 looking for SvIOK and checking for overflow will not outweigh the
2451 fp to integer speedup)
2452 * will slow down integer operations (callers of SvIV) on "inaccurate"
2453 values, as the change from SvIOK to SvIOKp will cause a call into
2454 sv_2iv each time rather than a macro access direct to the IV slot
2455 * should speed up number->string conversion on integers as IV is
2456 favoured when IV and NV are equally accurate
2458 ####################################################################
2459 You had better be using SvIOK_notUV if you want an IV for arithmetic:
2460 SvIOK is true if (IV or UV), so you might be getting (IV)SvUV.
2461 On the other hand, SvUOK is true iff UV.
2462 ####################################################################
2464 Your mileage will vary depending your CPU's relative fp to integer
2468 #ifndef NV_PRESERVES_UV
2469 # define IS_NUMBER_UNDERFLOW_IV 1
2470 # define IS_NUMBER_UNDERFLOW_UV 2
2471 # define IS_NUMBER_IV_AND_UV 2
2472 # define IS_NUMBER_OVERFLOW_IV 4
2473 # define IS_NUMBER_OVERFLOW_UV 5
2475 /* sv_2iuv_non_preserve(): private routine for use by sv_2iv() and sv_2uv() */
2477 /* For sv_2nv these three cases are "SvNOK and don't bother casting" */
2479 S_sv_2iuv_non_preserve(pTHX_ register SV *sv, I32 numtype)
2481 DEBUG_c(PerlIO_printf(Perl_debug_log,"sv_2iuv_non '%s', IV=0x%"UVxf" NV=%"NVgf" inttype=%"UVXf"\n", SvPVX(sv), SvIVX(sv), SvNVX(sv), (UV)numtype));
2482 if (SvNVX(sv) < (NV)IV_MIN) {
2483 (void)SvIOKp_on(sv);
2486 return IS_NUMBER_UNDERFLOW_IV;
2488 if (SvNVX(sv) > (NV)UV_MAX) {
2489 (void)SvIOKp_on(sv);
2493 return IS_NUMBER_OVERFLOW_UV;
2495 (void)SvIOKp_on(sv);
2497 /* Can't use strtol etc to convert this string. (See truth table in
2499 if (SvNVX(sv) <= (UV)IV_MAX) {
2500 SvIVX(sv) = I_V(SvNVX(sv));
2501 if ((NV)(SvIVX(sv)) == SvNVX(sv)) {
2502 SvIOK_on(sv); /* Integer is precise. NOK, IOK */
2504 /* Integer is imprecise. NOK, IOKp */
2506 return SvNVX(sv) < 0 ? IS_NUMBER_UNDERFLOW_UV : IS_NUMBER_IV_AND_UV;
2509 SvUVX(sv) = U_V(SvNVX(sv));
2510 if ((NV)(SvUVX(sv)) == SvNVX(sv)) {
2511 if (SvUVX(sv) == UV_MAX) {
2512 /* As we know that NVs don't preserve UVs, UV_MAX cannot
2513 possibly be preserved by NV. Hence, it must be overflow.
2515 return IS_NUMBER_OVERFLOW_UV;
2517 SvIOK_on(sv); /* Integer is precise. NOK, UOK */
2519 /* Integer is imprecise. NOK, IOKp */
2521 return IS_NUMBER_OVERFLOW_IV;
2523 #endif /* !NV_PRESERVES_UV*/
2525 /* sv_2iv() is now a macro using Perl_sv_2iv_flags();
2526 * this function provided for binary compatibility only
2530 Perl_sv_2iv(pTHX_ register SV *sv)
2532 return sv_2iv_flags(sv, SV_GMAGIC);
2536 =for apidoc sv_2iv_flags
2538 Return the integer value of an SV, doing any necessary string
2539 conversion. If flags includes SV_GMAGIC, does an mg_get() first.
2540 Normally used via the C<SvIV(sv)> and C<SvIVx(sv)> macros.
2546 Perl_sv_2iv_flags(pTHX_ register SV *sv, I32 flags)
2550 if (SvGMAGICAL(sv)) {
2551 if (flags & SV_GMAGIC)
2556 return I_V(SvNVX(sv));
2558 if (SvPOKp(sv) && SvLEN(sv))
2561 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
2562 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
2568 if (SvTHINKFIRST(sv)) {
2571 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,numer)) &&
2572 (!SvROK(tmpstr) || (SvRV(tmpstr) != SvRV(sv))))
2573 return SvIV(tmpstr);
2574 return PTR2IV(SvRV(sv));
2577 sv_force_normal_flags(sv, 0);
2579 if (SvREADONLY(sv) && !SvOK(sv)) {
2580 if (ckWARN(WARN_UNINITIALIZED))
2587 return (IV)(SvUVX(sv));
2594 /* erm. not sure. *should* never get NOKp (without NOK) from sv_2nv
2595 * without also getting a cached IV/UV from it at the same time
2596 * (ie PV->NV conversion should detect loss of accuracy and cache
2597 * IV or UV at same time to avoid this. NWC */
2599 if (SvTYPE(sv) == SVt_NV)
2600 sv_upgrade(sv, SVt_PVNV);
2602 (void)SvIOKp_on(sv); /* Must do this first, to clear any SvOOK */
2603 /* < not <= as for NV doesn't preserve UV, ((NV)IV_MAX+1) will almost
2604 certainly cast into the IV range at IV_MAX, whereas the correct
2605 answer is the UV IV_MAX +1. Hence < ensures that dodgy boundary
2607 if (SvNVX(sv) < (NV)IV_MAX + 0.5) {
2608 SvIVX(sv) = I_V(SvNVX(sv));
2609 if (SvNVX(sv) == (NV) SvIVX(sv)
2610 #ifndef NV_PRESERVES_UV
2611 && (((UV)1 << NV_PRESERVES_UV_BITS) >
2612 (UV)(SvIVX(sv) > 0 ? SvIVX(sv) : -SvIVX(sv)))
2613 /* Don't flag it as "accurately an integer" if the number
2614 came from a (by definition imprecise) NV operation, and
2615 we're outside the range of NV integer precision */
2618 SvIOK_on(sv); /* Can this go wrong with rounding? NWC */
2619 DEBUG_c(PerlIO_printf(Perl_debug_log,
2620 "0x%"UVxf" iv(%"NVgf" => %"IVdf") (precise)\n",
2626 /* IV not precise. No need to convert from PV, as NV
2627 conversion would already have cached IV if it detected
2628 that PV->IV would be better than PV->NV->IV
2629 flags already correct - don't set public IOK. */
2630 DEBUG_c(PerlIO_printf(Perl_debug_log,
2631 "0x%"UVxf" iv(%"NVgf" => %"IVdf") (imprecise)\n",
2636 /* Can the above go wrong if SvIVX == IV_MIN and SvNVX < IV_MIN,
2637 but the cast (NV)IV_MIN rounds to a the value less (more
2638 negative) than IV_MIN which happens to be equal to SvNVX ??
2639 Analogous to 0xFFFFFFFFFFFFFFFF rounding up to NV (2**64) and
2640 NV rounding back to 0xFFFFFFFFFFFFFFFF, so UVX == UV(NVX) and
2641 (NV)UVX == NVX are both true, but the values differ. :-(
2642 Hopefully for 2s complement IV_MIN is something like
2643 0x8000000000000000 which will be exact. NWC */
2646 SvUVX(sv) = U_V(SvNVX(sv));
2648 (SvNVX(sv) == (NV) SvUVX(sv))
2649 #ifndef NV_PRESERVES_UV
2650 /* Make sure it's not 0xFFFFFFFFFFFFFFFF */
2651 /*&& (SvUVX(sv) != UV_MAX) irrelevant with code below */
2652 && (((UV)1 << NV_PRESERVES_UV_BITS) > SvUVX(sv))
2653 /* Don't flag it as "accurately an integer" if the number
2654 came from a (by definition imprecise) NV operation, and
2655 we're outside the range of NV integer precision */
2661 DEBUG_c(PerlIO_printf(Perl_debug_log,
2662 "0x%"UVxf" 2iv(%"UVuf" => %"IVdf") (as unsigned)\n",
2666 return (IV)SvUVX(sv);
2669 else if (SvPOKp(sv) && SvLEN(sv)) {
2671 int numtype = grok_number(SvPVX(sv), SvCUR(sv), &value);
2672 /* We want to avoid a possible problem when we cache an IV which
2673 may be later translated to an NV, and the resulting NV is not
2674 the same as the direct translation of the initial string
2675 (eg 123.456 can shortcut to the IV 123 with atol(), but we must
2676 be careful to ensure that the value with the .456 is around if the
2677 NV value is requested in the future).
2679 This means that if we cache such an IV, we need to cache the
2680 NV as well. Moreover, we trade speed for space, and do not
2681 cache the NV if we are sure it's not needed.
2684 /* SVt_PVNV is one higher than SVt_PVIV, hence this order */
2685 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2686 == IS_NUMBER_IN_UV) {
2687 /* It's definitely an integer, only upgrade to PVIV */
2688 if (SvTYPE(sv) < SVt_PVIV)
2689 sv_upgrade(sv, SVt_PVIV);
2691 } else if (SvTYPE(sv) < SVt_PVNV)
2692 sv_upgrade(sv, SVt_PVNV);
2694 /* If NV preserves UV then we only use the UV value if we know that
2695 we aren't going to call atof() below. If NVs don't preserve UVs
2696 then the value returned may have more precision than atof() will
2697 return, even though value isn't perfectly accurate. */
2698 if ((numtype & (IS_NUMBER_IN_UV
2699 #ifdef NV_PRESERVES_UV
2702 )) == IS_NUMBER_IN_UV) {
2703 /* This won't turn off the public IOK flag if it was set above */
2704 (void)SvIOKp_on(sv);
2706 if (!(numtype & IS_NUMBER_NEG)) {
2708 if (value <= (UV)IV_MAX) {
2709 SvIVX(sv) = (IV)value;
2715 /* 2s complement assumption */
2716 if (value <= (UV)IV_MIN) {
2717 SvIVX(sv) = -(IV)value;
2719 /* Too negative for an IV. This is a double upgrade, but
2720 I'm assuming it will be rare. */
2721 if (SvTYPE(sv) < SVt_PVNV)
2722 sv_upgrade(sv, SVt_PVNV);
2726 SvNVX(sv) = -(NV)value;
2731 /* For !NV_PRESERVES_UV and IS_NUMBER_IN_UV and IS_NUMBER_NOT_INT we
2732 will be in the previous block to set the IV slot, and the next
2733 block to set the NV slot. So no else here. */
2735 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2736 != IS_NUMBER_IN_UV) {
2737 /* It wasn't an (integer that doesn't overflow the UV). */
2738 SvNVX(sv) = Atof(SvPVX(sv));
2740 if (! numtype && ckWARN(WARN_NUMERIC))
2743 #if defined(USE_LONG_DOUBLE)
2744 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2iv(%" PERL_PRIgldbl ")\n",
2745 PTR2UV(sv), SvNVX(sv)));
2747 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2iv(%"NVgf")\n",
2748 PTR2UV(sv), SvNVX(sv)));
2752 #ifdef NV_PRESERVES_UV
2753 (void)SvIOKp_on(sv);
2755 if (SvNVX(sv) < (NV)IV_MAX + 0.5) {
2756 SvIVX(sv) = I_V(SvNVX(sv));
2757 if ((NV)(SvIVX(sv)) == SvNVX(sv)) {
2760 /* Integer is imprecise. NOK, IOKp */
2762 /* UV will not work better than IV */
2764 if (SvNVX(sv) > (NV)UV_MAX) {
2766 /* Integer is inaccurate. NOK, IOKp, is UV */
2770 SvUVX(sv) = U_V(SvNVX(sv));
2771 /* 0xFFFFFFFFFFFFFFFF not an issue in here */
2772 if ((NV)(SvUVX(sv)) == SvNVX(sv)) {
2776 /* Integer is imprecise. NOK, IOKp, is UV */
2782 #else /* NV_PRESERVES_UV */
2783 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2784 == (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT)) {
2785 /* The IV slot will have been set from value returned by
2786 grok_number above. The NV slot has just been set using
2789 assert (SvIOKp(sv));
2791 if (((UV)1 << NV_PRESERVES_UV_BITS) >
2792 U_V(SvNVX(sv) > 0 ? SvNVX(sv) : -SvNVX(sv))) {
2793 /* Small enough to preserve all bits. */
2794 (void)SvIOKp_on(sv);
2796 SvIVX(sv) = I_V(SvNVX(sv));
2797 if ((NV)(SvIVX(sv)) == SvNVX(sv))
2799 /* Assumption: first non-preserved integer is < IV_MAX,
2800 this NV is in the preserved range, therefore: */
2801 if (!(U_V(SvNVX(sv) > 0 ? SvNVX(sv) : -SvNVX(sv))
2803 Perl_croak(aTHX_ "sv_2iv assumed (U_V(fabs((double)SvNVX(sv))) < (UV)IV_MAX) but SvNVX(sv)=%"NVgf" U_V is 0x%"UVxf", IV_MAX is 0x%"UVxf"\n", SvNVX(sv), U_V(SvNVX(sv)), (UV)IV_MAX);
2807 0 0 already failed to read UV.
2808 0 1 already failed to read UV.
2809 1 0 you won't get here in this case. IV/UV
2810 slot set, public IOK, Atof() unneeded.
2811 1 1 already read UV.
2812 so there's no point in sv_2iuv_non_preserve() attempting
2813 to use atol, strtol, strtoul etc. */
2814 if (sv_2iuv_non_preserve (sv, numtype)
2815 >= IS_NUMBER_OVERFLOW_IV)
2819 #endif /* NV_PRESERVES_UV */
2822 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP))
2824 if (SvTYPE(sv) < SVt_IV)
2825 /* Typically the caller expects that sv_any is not NULL now. */
2826 sv_upgrade(sv, SVt_IV);
2829 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2iv(%"IVdf")\n",
2830 PTR2UV(sv),SvIVX(sv)));
2831 return SvIsUV(sv) ? (IV)SvUVX(sv) : SvIVX(sv);
2834 /* sv_2uv() is now a macro using Perl_sv_2uv_flags();
2835 * this function provided for binary compatibility only
2839 Perl_sv_2uv(pTHX_ register SV *sv)
2841 return sv_2uv_flags(sv, SV_GMAGIC);
2845 =for apidoc sv_2uv_flags
2847 Return the unsigned integer value of an SV, doing any necessary string
2848 conversion. If flags includes SV_GMAGIC, does an mg_get() first.
2849 Normally used via the C<SvUV(sv)> and C<SvUVx(sv)> macros.
2855 Perl_sv_2uv_flags(pTHX_ register SV *sv, I32 flags)
2859 if (SvGMAGICAL(sv)) {
2860 if (flags & SV_GMAGIC)
2865 return U_V(SvNVX(sv));
2866 if (SvPOKp(sv) && SvLEN(sv))
2869 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
2870 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
2876 if (SvTHINKFIRST(sv)) {
2879 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,numer)) &&
2880 (!SvROK(tmpstr) || (SvRV(tmpstr) != SvRV(sv))))
2881 return SvUV(tmpstr);
2882 return PTR2UV(SvRV(sv));
2885 sv_force_normal_flags(sv, 0);
2887 if (SvREADONLY(sv) && !SvOK(sv)) {
2888 if (ckWARN(WARN_UNINITIALIZED))
2898 return (UV)SvIVX(sv);
2902 /* erm. not sure. *should* never get NOKp (without NOK) from sv_2nv
2903 * without also getting a cached IV/UV from it at the same time
2904 * (ie PV->NV conversion should detect loss of accuracy and cache
2905 * IV or UV at same time to avoid this. */
2906 /* IV-over-UV optimisation - choose to cache IV if possible */
2908 if (SvTYPE(sv) == SVt_NV)
2909 sv_upgrade(sv, SVt_PVNV);
2911 (void)SvIOKp_on(sv); /* Must do this first, to clear any SvOOK */
2912 if (SvNVX(sv) < (NV)IV_MAX + 0.5) {
2913 SvIVX(sv) = I_V(SvNVX(sv));
2914 if (SvNVX(sv) == (NV) SvIVX(sv)
2915 #ifndef NV_PRESERVES_UV
2916 && (((UV)1 << NV_PRESERVES_UV_BITS) >
2917 (UV)(SvIVX(sv) > 0 ? SvIVX(sv) : -SvIVX(sv)))
2918 /* Don't flag it as "accurately an integer" if the number
2919 came from a (by definition imprecise) NV operation, and
2920 we're outside the range of NV integer precision */
2923 SvIOK_on(sv); /* Can this go wrong with rounding? NWC */
2924 DEBUG_c(PerlIO_printf(Perl_debug_log,
2925 "0x%"UVxf" uv(%"NVgf" => %"IVdf") (precise)\n",
2931 /* IV not precise. No need to convert from PV, as NV
2932 conversion would already have cached IV if it detected
2933 that PV->IV would be better than PV->NV->IV
2934 flags already correct - don't set public IOK. */
2935 DEBUG_c(PerlIO_printf(Perl_debug_log,
2936 "0x%"UVxf" uv(%"NVgf" => %"IVdf") (imprecise)\n",
2941 /* Can the above go wrong if SvIVX == IV_MIN and SvNVX < IV_MIN,
2942 but the cast (NV)IV_MIN rounds to a the value less (more
2943 negative) than IV_MIN which happens to be equal to SvNVX ??
2944 Analogous to 0xFFFFFFFFFFFFFFFF rounding up to NV (2**64) and
2945 NV rounding back to 0xFFFFFFFFFFFFFFFF, so UVX == UV(NVX) and
2946 (NV)UVX == NVX are both true, but the values differ. :-(
2947 Hopefully for 2s complement IV_MIN is something like
2948 0x8000000000000000 which will be exact. NWC */
2951 SvUVX(sv) = U_V(SvNVX(sv));
2953 (SvNVX(sv) == (NV) SvUVX(sv))
2954 #ifndef NV_PRESERVES_UV
2955 /* Make sure it's not 0xFFFFFFFFFFFFFFFF */
2956 /*&& (SvUVX(sv) != UV_MAX) irrelevant with code below */
2957 && (((UV)1 << NV_PRESERVES_UV_BITS) > SvUVX(sv))
2958 /* Don't flag it as "accurately an integer" if the number
2959 came from a (by definition imprecise) NV operation, and
2960 we're outside the range of NV integer precision */
2965 DEBUG_c(PerlIO_printf(Perl_debug_log,
2966 "0x%"UVxf" 2uv(%"UVuf" => %"IVdf") (as unsigned)\n",
2972 else if (SvPOKp(sv) && SvLEN(sv)) {
2974 int numtype = grok_number(SvPVX(sv), SvCUR(sv), &value);
2976 /* We want to avoid a possible problem when we cache a UV which
2977 may be later translated to an NV, and the resulting NV is not
2978 the translation of the initial data.
2980 This means that if we cache such a UV, we need to cache the
2981 NV as well. Moreover, we trade speed for space, and do not
2982 cache the NV if not needed.
2985 /* SVt_PVNV is one higher than SVt_PVIV, hence this order */
2986 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2987 == IS_NUMBER_IN_UV) {
2988 /* It's definitely an integer, only upgrade to PVIV */
2989 if (SvTYPE(sv) < SVt_PVIV)
2990 sv_upgrade(sv, SVt_PVIV);
2992 } else if (SvTYPE(sv) < SVt_PVNV)
2993 sv_upgrade(sv, SVt_PVNV);
2995 /* If NV preserves UV then we only use the UV value if we know that
2996 we aren't going to call atof() below. If NVs don't preserve UVs
2997 then the value returned may have more precision than atof() will
2998 return, even though it isn't accurate. */
2999 if ((numtype & (IS_NUMBER_IN_UV
3000 #ifdef NV_PRESERVES_UV
3003 )) == IS_NUMBER_IN_UV) {
3004 /* This won't turn off the public IOK flag if it was set above */
3005 (void)SvIOKp_on(sv);
3007 if (!(numtype & IS_NUMBER_NEG)) {
3009 if (value <= (UV)IV_MAX) {
3010 SvIVX(sv) = (IV)value;
3012 /* it didn't overflow, and it was positive. */
3017 /* 2s complement assumption */
3018 if (value <= (UV)IV_MIN) {
3019 SvIVX(sv) = -(IV)value;
3021 /* Too negative for an IV. This is a double upgrade, but
3022 I'm assuming it will be rare. */
3023 if (SvTYPE(sv) < SVt_PVNV)
3024 sv_upgrade(sv, SVt_PVNV);
3028 SvNVX(sv) = -(NV)value;
3034 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
3035 != IS_NUMBER_IN_UV) {
3036 /* It wasn't an integer, or it overflowed the UV. */
3037 SvNVX(sv) = Atof(SvPVX(sv));
3039 if (! numtype && ckWARN(WARN_NUMERIC))
3042 #if defined(USE_LONG_DOUBLE)
3043 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2uv(%" PERL_PRIgldbl ")\n",
3044 PTR2UV(sv), SvNVX(sv)));
3046 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2uv(%"NVgf")\n",
3047 PTR2UV(sv), SvNVX(sv)));
3050 #ifdef NV_PRESERVES_UV
3051 (void)SvIOKp_on(sv);
3053 if (SvNVX(sv) < (NV)IV_MAX + 0.5) {
3054 SvIVX(sv) = I_V(SvNVX(sv));
3055 if ((NV)(SvIVX(sv)) == SvNVX(sv)) {
3058 /* Integer is imprecise. NOK, IOKp */
3060 /* UV will not work better than IV */
3062 if (SvNVX(sv) > (NV)UV_MAX) {
3064 /* Integer is inaccurate. NOK, IOKp, is UV */
3068 SvUVX(sv) = U_V(SvNVX(sv));
3069 /* 0xFFFFFFFFFFFFFFFF not an issue in here, NVs
3070 NV preservse UV so can do correct comparison. */
3071 if ((NV)(SvUVX(sv)) == SvNVX(sv)) {
3075 /* Integer is imprecise. NOK, IOKp, is UV */
3080 #else /* NV_PRESERVES_UV */
3081 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
3082 == (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT)) {
3083 /* The UV slot will have been set from value returned by
3084 grok_number above. The NV slot has just been set using
3087 assert (SvIOKp(sv));
3089 if (((UV)1 << NV_PRESERVES_UV_BITS) >
3090 U_V(SvNVX(sv) > 0 ? SvNVX(sv) : -SvNVX(sv))) {
3091 /* Small enough to preserve all bits. */
3092 (void)SvIOKp_on(sv);
3094 SvIVX(sv) = I_V(SvNVX(sv));
3095 if ((NV)(SvIVX(sv)) == SvNVX(sv))
3097 /* Assumption: first non-preserved integer is < IV_MAX,
3098 this NV is in the preserved range, therefore: */
3099 if (!(U_V(SvNVX(sv) > 0 ? SvNVX(sv) : -SvNVX(sv))
3101 Perl_croak(aTHX_ "sv_2uv assumed (U_V(fabs((double)SvNVX(sv))) < (UV)IV_MAX) but SvNVX(sv)=%"NVgf" U_V is 0x%"UVxf", IV_MAX is 0x%"UVxf"\n", SvNVX(sv), U_V(SvNVX(sv)), (UV)IV_MAX);
3104 sv_2iuv_non_preserve (sv, numtype);
3106 #endif /* NV_PRESERVES_UV */
3110 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
3111 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
3114 if (SvTYPE(sv) < SVt_IV)
3115 /* Typically the caller expects that sv_any is not NULL now. */
3116 sv_upgrade(sv, SVt_IV);
3120 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2uv(%"UVuf")\n",
3121 PTR2UV(sv),SvUVX(sv)));
3122 return SvIsUV(sv) ? SvUVX(sv) : (UV)SvIVX(sv);
3128 Return the num value of an SV, doing any necessary string or integer
3129 conversion, magic etc. Normally used via the C<SvNV(sv)> and C<SvNVx(sv)>
3136 Perl_sv_2nv(pTHX_ register SV *sv)
3140 if (SvGMAGICAL(sv)) {
3144 if (SvPOKp(sv) && SvLEN(sv)) {
3145 if (ckWARN(WARN_NUMERIC) && !SvIOKp(sv) &&
3146 !grok_number(SvPVX(sv), SvCUR(sv), NULL))
3148 return Atof(SvPVX(sv));
3152 return (NV)SvUVX(sv);
3154 return (NV)SvIVX(sv);
3157 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
3158 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
3164 if (SvTHINKFIRST(sv)) {
3167 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,numer)) &&
3168 (!SvROK(tmpstr) || (SvRV(tmpstr) != SvRV(sv))))
3169 return SvNV(tmpstr);
3170 return PTR2NV(SvRV(sv));
3173 sv_force_normal_flags(sv, 0);
3175 if (SvREADONLY(sv) && !SvOK(sv)) {
3176 if (ckWARN(WARN_UNINITIALIZED))
3181 if (SvTYPE(sv) < SVt_NV) {
3182 if (SvTYPE(sv) == SVt_IV)
3183 sv_upgrade(sv, SVt_PVNV);
3185 sv_upgrade(sv, SVt_NV);
3186 #ifdef USE_LONG_DOUBLE
3188 STORE_NUMERIC_LOCAL_SET_STANDARD();
3189 PerlIO_printf(Perl_debug_log,
3190 "0x%"UVxf" num(%" PERL_PRIgldbl ")\n",
3191 PTR2UV(sv), SvNVX(sv));
3192 RESTORE_NUMERIC_LOCAL();
3196 STORE_NUMERIC_LOCAL_SET_STANDARD();
3197 PerlIO_printf(Perl_debug_log, "0x%"UVxf" num(%"NVgf")\n",
3198 PTR2UV(sv), SvNVX(sv));
3199 RESTORE_NUMERIC_LOCAL();
3203 else if (SvTYPE(sv) < SVt_PVNV)
3204 sv_upgrade(sv, SVt_PVNV);
3209 SvNVX(sv) = SvIsUV(sv) ? (NV)SvUVX(sv) : (NV)SvIVX(sv);
3210 #ifdef NV_PRESERVES_UV
3213 /* Only set the public NV OK flag if this NV preserves the IV */
3214 /* Check it's not 0xFFFFFFFFFFFFFFFF */
3215 if (SvIsUV(sv) ? ((SvUVX(sv) != UV_MAX)&&(SvUVX(sv) == U_V(SvNVX(sv))))
3216 : (SvIVX(sv) == I_V(SvNVX(sv))))
3222 else if (SvPOKp(sv) && SvLEN(sv)) {
3224 int numtype = grok_number(SvPVX(sv), SvCUR(sv), &value);
3225 if (ckWARN(WARN_NUMERIC) && !SvIOKp(sv) && !numtype)
3227 #ifdef NV_PRESERVES_UV
3228 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
3229 == IS_NUMBER_IN_UV) {
3230 /* It's definitely an integer */
3231 SvNVX(sv) = (numtype & IS_NUMBER_NEG) ? -(NV)value : (NV)value;
3233 SvNVX(sv) = Atof(SvPVX(sv));
3236 SvNVX(sv) = Atof(SvPVX(sv));
3237 /* Only set the public NV OK flag if this NV preserves the value in
3238 the PV at least as well as an IV/UV would.
3239 Not sure how to do this 100% reliably. */
3240 /* if that shift count is out of range then Configure's test is
3241 wonky. We shouldn't be in here with NV_PRESERVES_UV_BITS ==
3243 if (((UV)1 << NV_PRESERVES_UV_BITS) >
3244 U_V(SvNVX(sv) > 0 ? SvNVX(sv) : -SvNVX(sv))) {
3245 SvNOK_on(sv); /* Definitely small enough to preserve all bits */
3246 } else if (!(numtype & IS_NUMBER_IN_UV)) {
3247 /* Can't use strtol etc to convert this string, so don't try.
3248 sv_2iv and sv_2uv will use the NV to convert, not the PV. */
3251 /* value has been set. It may not be precise. */
3252 if ((numtype & IS_NUMBER_NEG) && (value > (UV)IV_MIN)) {
3253 /* 2s complement assumption for (UV)IV_MIN */
3254 SvNOK_on(sv); /* Integer is too negative. */
3259 if (numtype & IS_NUMBER_NEG) {
3260 SvIVX(sv) = -(IV)value;
3261 } else if (value <= (UV)IV_MAX) {
3262 SvIVX(sv) = (IV)value;
3268 if (numtype & IS_NUMBER_NOT_INT) {
3269 /* I believe that even if the original PV had decimals,
3270 they are lost beyond the limit of the FP precision.
3271 However, neither is canonical, so both only get p
3272 flags. NWC, 2000/11/25 */
3273 /* Both already have p flags, so do nothing */
3276 if (SvNVX(sv) < (NV)IV_MAX + 0.5) {
3277 if (SvIVX(sv) == I_V(nv)) {
3282 /* It had no "." so it must be integer. */
3285 /* between IV_MAX and NV(UV_MAX).
3286 Could be slightly > UV_MAX */
3288 if (numtype & IS_NUMBER_NOT_INT) {
3289 /* UV and NV both imprecise. */
3291 UV nv_as_uv = U_V(nv);
3293 if (value == nv_as_uv && SvUVX(sv) != UV_MAX) {
3304 #endif /* NV_PRESERVES_UV */
3307 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP))
3309 if (SvTYPE(sv) < SVt_NV)
3310 /* Typically the caller expects that sv_any is not NULL now. */
3311 /* XXX Ilya implies that this is a bug in callers that assume this
3312 and ideally should be fixed. */
3313 sv_upgrade(sv, SVt_NV);
3316 #if defined(USE_LONG_DOUBLE)
3318 STORE_NUMERIC_LOCAL_SET_STANDARD();
3319 PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2nv(%" PERL_PRIgldbl ")\n",
3320 PTR2UV(sv), SvNVX(sv));
3321 RESTORE_NUMERIC_LOCAL();
3325 STORE_NUMERIC_LOCAL_SET_STANDARD();
3326 PerlIO_printf(Perl_debug_log, "0x%"UVxf" 1nv(%"NVgf")\n",
3327 PTR2UV(sv), SvNVX(sv));
3328 RESTORE_NUMERIC_LOCAL();
3334 /* asIV(): extract an integer from the string value of an SV.
3335 * Caller must validate PVX */
3338 S_asIV(pTHX_ SV *sv)
3341 int numtype = grok_number(SvPVX(sv), SvCUR(sv), &value);
3343 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
3344 == IS_NUMBER_IN_UV) {
3345 /* It's definitely an integer */
3346 if (numtype & IS_NUMBER_NEG) {
3347 if (value < (UV)IV_MIN)
3350 if (value < (UV)IV_MAX)
3355 if (ckWARN(WARN_NUMERIC))
3358 return I_V(Atof(SvPVX(sv)));
3361 /* asUV(): extract an unsigned integer from the string value of an SV
3362 * Caller must validate PVX */
3365 S_asUV(pTHX_ SV *sv)
3368 int numtype = grok_number(SvPVX(sv), SvCUR(sv), &value);
3370 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
3371 == IS_NUMBER_IN_UV) {
3372 /* It's definitely an integer */
3373 if (!(numtype & IS_NUMBER_NEG))
3377 if (ckWARN(WARN_NUMERIC))
3380 return U_V(Atof(SvPVX(sv)));
3384 =for apidoc sv_2pv_nolen
3386 Like C<sv_2pv()>, but doesn't return the length too. You should usually
3387 use the macro wrapper C<SvPV_nolen(sv)> instead.
3392 Perl_sv_2pv_nolen(pTHX_ register SV *sv)
3395 return sv_2pv(sv, &n_a);
3398 /* uiv_2buf(): private routine for use by sv_2pv_flags(): print an IV or
3399 * UV as a string towards the end of buf, and return pointers to start and
3402 * We assume that buf is at least TYPE_CHARS(UV) long.
3406 uiv_2buf(char *buf, IV iv, UV uv, int is_uv, char **peob)
3408 char *ptr = buf + TYPE_CHARS(UV);
3422 *--ptr = '0' + (char)(uv % 10);
3430 /* sv_2pv() is now a macro using Perl_sv_2pv_flags();
3431 * this function provided for binary compatibility only
3435 Perl_sv_2pv(pTHX_ register SV *sv, STRLEN *lp)
3437 return sv_2pv_flags(sv, lp, SV_GMAGIC);
3441 =for apidoc sv_2pv_flags
3443 Returns a pointer to the string value of an SV, and sets *lp to its length.
3444 If flags includes SV_GMAGIC, does an mg_get() first. Coerces sv to a string
3446 Normally invoked via the C<SvPV_flags> macro. C<sv_2pv()> and C<sv_2pv_nomg>
3447 usually end up here too.
3453 Perl_sv_2pv_flags(pTHX_ register SV *sv, STRLEN *lp, I32 flags)
3458 char tbuf[64]; /* Must fit sprintf/Gconvert of longest IV/NV */
3459 char *tmpbuf = tbuf;
3465 if (SvGMAGICAL(sv)) {
3466 if (flags & SV_GMAGIC)
3474 (void)sprintf(tmpbuf,"%"UVuf, (UV)SvUVX(sv));
3476 (void)sprintf(tmpbuf,"%"IVdf, (IV)SvIVX(sv));
3481 Gconvert(SvNVX(sv), NV_DIG, 0, tmpbuf);
3486 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
3487 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
3494 if (SvTHINKFIRST(sv)) {
3497 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,string)) &&
3498 (!SvROK(tmpstr) || (SvRV(tmpstr) != SvRV(sv)))) {
3499 char *pv = SvPV(tmpstr, *lp);
3513 switch (SvTYPE(sv)) {
3515 if ( ((SvFLAGS(sv) &
3516 (SVs_OBJECT|SVf_OK|SVs_GMG|SVs_SMG|SVs_RMG))
3517 == (SVs_OBJECT|SVs_SMG))
3518 && (mg = mg_find(sv, PERL_MAGIC_qr))) {
3519 regexp *re = (regexp *)mg->mg_obj;
3522 char *fptr = "msix";
3527 char need_newline = 0;
3528 U16 reganch = (U16)((re->reganch & PMf_COMPILETIME) >> 12);
3530 while((ch = *fptr++)) {
3532 reflags[left++] = ch;
3535 reflags[right--] = ch;
3540 reflags[left] = '-';
3544 mg->mg_len = re->prelen + 4 + left;
3546 * If /x was used, we have to worry about a regex
3547 * ending with a comment later being embedded
3548 * within another regex. If so, we don't want this
3549 * regex's "commentization" to leak out to the
3550 * right part of the enclosing regex, we must cap
3551 * it with a newline.
3553 * So, if /x was used, we scan backwards from the
3554 * end of the regex. If we find a '#' before we
3555 * find a newline, we need to add a newline
3556 * ourself. If we find a '\n' first (or if we
3557 * don't find '#' or '\n'), we don't need to add
3558 * anything. -jfriedl
3560 if (PMf_EXTENDED & re->reganch)
3562 char *endptr = re->precomp + re->prelen;
3563 while (endptr >= re->precomp)
3565 char c = *(endptr--);
3567 break; /* don't need another */
3569 /* we end while in a comment, so we
3571 mg->mg_len++; /* save space for it */
3572 need_newline = 1; /* note to add it */
3578 New(616, mg->mg_ptr, mg->mg_len + 1 + left, char);
3579 Copy("(?", mg->mg_ptr, 2, char);
3580 Copy(reflags, mg->mg_ptr+2, left, char);
3581 Copy(":", mg->mg_ptr+left+2, 1, char);
3582 Copy(re->precomp, mg->mg_ptr+3+left, re->prelen, char);
3584 mg->mg_ptr[mg->mg_len - 2] = '\n';
3585 mg->mg_ptr[mg->mg_len - 1] = ')';
3586 mg->mg_ptr[mg->mg_len] = 0;
3588 PL_reginterp_cnt += re->program[0].next_off;
3590 if (re->reganch & ROPT_UTF8)
3605 case SVt_PVBM: if (SvROK(sv))
3608 s = "SCALAR"; break;
3609 case SVt_PVLV: s = SvROK(sv) ? "REF"
3610 /* tied lvalues should appear to be
3611 * scalars for backwards compatitbility */
3612 : (LvTYPE(sv) == 't' || LvTYPE(sv) == 'T')
3613 ? "SCALAR" : "LVALUE"; break;
3614 case SVt_PVAV: s = "ARRAY"; break;
3615 case SVt_PVHV: s = "HASH"; break;
3616 case SVt_PVCV: s = "CODE"; break;
3617 case SVt_PVGV: s = "GLOB"; break;
3618 case SVt_PVFM: s = "FORMAT"; break;
3619 case SVt_PVIO: s = "IO"; break;
3620 default: s = "UNKNOWN"; break;
3624 const char *name = HvNAME(SvSTASH(sv));
3625 Perl_sv_setpvf(aTHX_ tsv, "%s=%s(0x%"UVxf")",
3626 name ? name : "__ANON__" , s, PTR2UV(sv));
3629 Perl_sv_setpvf(aTHX_ tsv, "%s(0x%"UVxf")", s, PTR2UV(sv));
3635 if (SvREADONLY(sv) && !SvOK(sv)) {
3636 if (ckWARN(WARN_UNINITIALIZED))
3642 if (SvIOK(sv) || ((SvIOKp(sv) && !SvNOKp(sv)))) {
3643 /* I'm assuming that if both IV and NV are equally valid then
3644 converting the IV is going to be more efficient */
3645 U32 isIOK = SvIOK(sv);
3646 U32 isUIOK = SvIsUV(sv);
3647 char buf[TYPE_CHARS(UV)];
3650 if (SvTYPE(sv) < SVt_PVIV)
3651 sv_upgrade(sv, SVt_PVIV);
3653 ptr = uiv_2buf(buf, 0, SvUVX(sv), 1, &ebuf);
3655 ptr = uiv_2buf(buf, SvIVX(sv), 0, 0, &ebuf);
3656 SvGROW(sv, (STRLEN)(ebuf - ptr + 1)); /* inlined from sv_setpvn */
3657 Move(ptr,SvPVX(sv),ebuf - ptr,char);
3658 SvCUR_set(sv, ebuf - ptr);
3668 else if (SvNOKp(sv)) {
3669 if (SvTYPE(sv) < SVt_PVNV)
3670 sv_upgrade(sv, SVt_PVNV);
3671 /* The +20 is pure guesswork. Configure test needed. --jhi */
3672 SvGROW(sv, NV_DIG + 20);
3674 olderrno = errno; /* some Xenix systems wipe out errno here */
3676 if (SvNVX(sv) == 0.0)
3677 (void)strcpy(s,"0");
3681 Gconvert(SvNVX(sv), NV_DIG, 0, s);
3684 #ifdef FIXNEGATIVEZERO
3685 if (*s == '-' && s[1] == '0' && !s[2])
3695 if (ckWARN(WARN_UNINITIALIZED)
3696 && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP))
3699 if (SvTYPE(sv) < SVt_PV)
3700 /* Typically the caller expects that sv_any is not NULL now. */
3701 sv_upgrade(sv, SVt_PV);
3704 *lp = s - SvPVX(sv);
3707 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2pv(%s)\n",
3708 PTR2UV(sv),SvPVX(sv)));
3712 if (SvROK(sv)) { /* XXX Skip this when sv_pvn_force calls */
3713 /* Sneaky stuff here */
3717 tsv = newSVpv(tmpbuf, 0);
3733 len = strlen(tmpbuf);
3735 #ifdef FIXNEGATIVEZERO
3736 if (len == 2 && t[0] == '-' && t[1] == '0') {
3741 (void)SvUPGRADE(sv, SVt_PV);
3743 s = SvGROW(sv, len + 1);
3746 return strcpy(s, t);
3751 =for apidoc sv_copypv
3753 Copies a stringified representation of the source SV into the
3754 destination SV. Automatically performs any necessary mg_get and
3755 coercion of numeric values into strings. Guaranteed to preserve
3756 UTF-8 flag even from overloaded objects. Similar in nature to
3757 sv_2pv[_flags] but operates directly on an SV instead of just the
3758 string. Mostly uses sv_2pv_flags to do its work, except when that
3759 would lose the UTF-8'ness of the PV.
3765 Perl_sv_copypv(pTHX_ SV *dsv, register SV *ssv)
3770 sv_setpvn(dsv,s,len);
3778 =for apidoc sv_2pvbyte_nolen
3780 Return a pointer to the byte-encoded representation of the SV.
3781 May cause the SV to be downgraded from UTF-8 as a side-effect.
3783 Usually accessed via the C<SvPVbyte_nolen> macro.
3789 Perl_sv_2pvbyte_nolen(pTHX_ register SV *sv)
3792 return sv_2pvbyte(sv, &n_a);
3796 =for apidoc sv_2pvbyte
3798 Return a pointer to the byte-encoded representation of the SV, and set *lp
3799 to its length. May cause the SV to be downgraded from UTF-8 as a
3802 Usually accessed via the C<SvPVbyte> macro.
3808 Perl_sv_2pvbyte(pTHX_ register SV *sv, STRLEN *lp)
3810 sv_utf8_downgrade(sv,0);
3811 return SvPV(sv,*lp);
3815 =for apidoc sv_2pvutf8_nolen
3817 Return a pointer to the UTF-8-encoded representation of the SV.
3818 May cause the SV to be upgraded to UTF-8 as a side-effect.
3820 Usually accessed via the C<SvPVutf8_nolen> macro.
3826 Perl_sv_2pvutf8_nolen(pTHX_ register SV *sv)
3829 return sv_2pvutf8(sv, &n_a);
3833 =for apidoc sv_2pvutf8
3835 Return a pointer to the UTF-8-encoded representation of the SV, and set *lp
3836 to its length. May cause the SV to be upgraded to UTF-8 as a side-effect.
3838 Usually accessed via the C<SvPVutf8> macro.
3844 Perl_sv_2pvutf8(pTHX_ register SV *sv, STRLEN *lp)
3846 sv_utf8_upgrade(sv);
3847 return SvPV(sv,*lp);
3851 =for apidoc sv_2bool
3853 This function is only called on magical items, and is only used by
3854 sv_true() or its macro equivalent.
3860 Perl_sv_2bool(pTHX_ register SV *sv)
3869 if (SvAMAGIC(sv) && (tmpsv=AMG_CALLun(sv,bool_)) &&
3870 (!SvROK(tmpsv) || (SvRV(tmpsv) != SvRV(sv))))
3871 return (bool)SvTRUE(tmpsv);
3872 return SvRV(sv) != 0;
3875 register XPV* Xpvtmp;
3876 if ((Xpvtmp = (XPV*)SvANY(sv)) &&
3877 (*Xpvtmp->xpv_pv > '0' ||
3878 Xpvtmp->xpv_cur > 1 ||
3879 (Xpvtmp->xpv_cur && *Xpvtmp->xpv_pv != '0')))
3886 return SvIVX(sv) != 0;
3889 return SvNVX(sv) != 0.0;
3896 /* sv_utf8_upgrade() is now a macro using sv_utf8_upgrade_flags();
3897 * this function provided for binary compatibility only
3902 Perl_sv_utf8_upgrade(pTHX_ register SV *sv)
3904 return sv_utf8_upgrade_flags(sv, SV_GMAGIC);
3908 =for apidoc sv_utf8_upgrade
3910 Converts the PV of an SV to its UTF-8-encoded form.
3911 Forces the SV to string form if it is not already.
3912 Always sets the SvUTF8 flag to avoid future validity checks even
3913 if all the bytes have hibit clear.
3915 This is not as a general purpose byte encoding to Unicode interface:
3916 use the Encode extension for that.
3918 =for apidoc sv_utf8_upgrade_flags
3920 Converts the PV of an SV to its UTF-8-encoded form.
3921 Forces the SV to string form if it is not already.
3922 Always sets the SvUTF8 flag to avoid future validity checks even
3923 if all the bytes have hibit clear. If C<flags> has C<SV_GMAGIC> bit set,
3924 will C<mg_get> on C<sv> if appropriate, else not. C<sv_utf8_upgrade> and
3925 C<sv_utf8_upgrade_nomg> are implemented in terms of this function.
3927 This is not as a general purpose byte encoding to Unicode interface:
3928 use the Encode extension for that.
3934 Perl_sv_utf8_upgrade_flags(pTHX_ register SV *sv, I32 flags)
3939 if (sv == &PL_sv_undef)
3943 if (SvREADONLY(sv) && (SvPOKp(sv) || SvIOKp(sv) || SvNOKp(sv))) {
3944 (void) sv_2pv_flags(sv,&len, flags);
3948 (void) SvPV_force(sv,len);
3957 sv_force_normal_flags(sv, 0);
3960 if (PL_encoding && !(flags & SV_UTF8_NO_ENCODING))
3961 sv_recode_to_utf8(sv, PL_encoding);
3962 else { /* Assume Latin-1/EBCDIC */
3963 /* This function could be much more efficient if we
3964 * had a FLAG in SVs to signal if there are any hibit
3965 * chars in the PV. Given that there isn't such a flag
3966 * make the loop as fast as possible. */
3967 s = (U8 *) SvPVX(sv);
3968 e = (U8 *) SvEND(sv);
3972 if ((hibit = !NATIVE_IS_INVARIANT(ch)))
3977 (void)SvOOK_off(sv);
3979 len = SvCUR(sv) + 1; /* Plus the \0 */
3980 SvPVX(sv) = (char*)bytes_to_utf8((U8*)s, &len);
3981 SvCUR(sv) = len - 1;
3983 Safefree(s); /* No longer using what was there before. */
3984 SvLEN(sv) = len; /* No longer know the real size. */
3986 /* Mark as UTF-8 even if no hibit - saves scanning loop */
3993 =for apidoc sv_utf8_downgrade
3995 Attempts to convert the PV of an SV from characters to bytes.
3996 If the PV contains a character beyond byte, this conversion will fail;
3997 in this case, either returns false or, if C<fail_ok> is not
4000 This is not as a general purpose Unicode to byte encoding interface:
4001 use the Encode extension for that.
4007 Perl_sv_utf8_downgrade(pTHX_ register SV* sv, bool fail_ok)
4009 if (SvPOKp(sv) && SvUTF8(sv)) {
4015 sv_force_normal_flags(sv, 0);
4017 s = (U8 *) SvPV(sv, len);
4018 if (!utf8_to_bytes(s, &len)) {
4023 Perl_croak(aTHX_ "Wide character in %s",
4026 Perl_croak(aTHX_ "Wide character");
4037 =for apidoc sv_utf8_encode
4039 Converts the PV of an SV to UTF-8, but then turns the C<SvUTF8>
4040 flag off so that it looks like octets again.
4046 Perl_sv_utf8_encode(pTHX_ register SV *sv)
4048 (void) sv_utf8_upgrade(sv);
4050 sv_force_normal_flags(sv, 0);
4052 if (SvREADONLY(sv)) {
4053 Perl_croak(aTHX_ PL_no_modify);
4059 =for apidoc sv_utf8_decode
4061 If the PV of the SV is an octet sequence in UTF-8
4062 and contains a multiple-byte character, the C<SvUTF8> flag is turned on
4063 so that it looks like a character. If the PV contains only single-byte
4064 characters, the C<SvUTF8> flag stays being off.
4065 Scans PV for validity and returns false if the PV is invalid UTF-8.
4071 Perl_sv_utf8_decode(pTHX_ register SV *sv)
4077 /* The octets may have got themselves encoded - get them back as
4080 if (!sv_utf8_downgrade(sv, TRUE))
4083 /* it is actually just a matter of turning the utf8 flag on, but
4084 * we want to make sure everything inside is valid utf8 first.
4086 c = (U8 *) SvPVX(sv);
4087 if (!is_utf8_string(c, SvCUR(sv)+1))
4089 e = (U8 *) SvEND(sv);
4092 if (!UTF8_IS_INVARIANT(ch)) {
4101 /* sv_setsv() is now a macro using Perl_sv_setsv_flags();
4102 * this function provided for binary compatibility only
4106 Perl_sv_setsv(pTHX_ SV *dstr, register SV *sstr)
4108 sv_setsv_flags(dstr, sstr, SV_GMAGIC);
4112 =for apidoc sv_setsv
4114 Copies the contents of the source SV C<ssv> into the destination SV
4115 C<dsv>. The source SV may be destroyed if it is mortal, so don't use this
4116 function if the source SV needs to be reused. Does not handle 'set' magic.
4117 Loosely speaking, it performs a copy-by-value, obliterating any previous
4118 content of the destination.
4120 You probably want to use one of the assortment of wrappers, such as
4121 C<SvSetSV>, C<SvSetSV_nosteal>, C<SvSetMagicSV> and
4122 C<SvSetMagicSV_nosteal>.
4124 =for apidoc sv_setsv_flags
4126 Copies the contents of the source SV C<ssv> into the destination SV
4127 C<dsv>. The source SV may be destroyed if it is mortal, so don't use this
4128 function if the source SV needs to be reused. Does not handle 'set' magic.
4129 Loosely speaking, it performs a copy-by-value, obliterating any previous
4130 content of the destination.
4131 If the C<flags> parameter has the C<SV_GMAGIC> bit set, will C<mg_get> on
4132 C<ssv> if appropriate, else not. If the C<flags> parameter has the
4133 C<NOSTEAL> bit set then the buffers of temps will not be stolen. <sv_setsv>
4134 and C<sv_setsv_nomg> are implemented in terms of this function.
4136 You probably want to use one of the assortment of wrappers, such as
4137 C<SvSetSV>, C<SvSetSV_nosteal>, C<SvSetMagicSV> and
4138 C<SvSetMagicSV_nosteal>.
4140 This is the primary function for copying scalars, and most other
4141 copy-ish functions and macros use this underneath.
4147 Perl_sv_setsv_flags(pTHX_ SV *dstr, register SV *sstr, I32 flags)
4149 register U32 sflags;
4155 SV_CHECK_THINKFIRST_COW_DROP(dstr);
4157 sstr = &PL_sv_undef;
4158 stype = SvTYPE(sstr);
4159 dtype = SvTYPE(dstr);
4164 /* need to nuke the magic */
4166 SvRMAGICAL_off(dstr);
4169 /* There's a lot of redundancy below but we're going for speed here */
4174 if (dtype != SVt_PVGV) {
4175 (void)SvOK_off(dstr);
4183 sv_upgrade(dstr, SVt_IV);
4186 sv_upgrade(dstr, SVt_PVNV);
4190 sv_upgrade(dstr, SVt_PVIV);
4193 (void)SvIOK_only(dstr);
4194 SvIVX(dstr) = SvIVX(sstr);
4197 if (SvTAINTED(sstr))
4208 sv_upgrade(dstr, SVt_NV);
4213 sv_upgrade(dstr, SVt_PVNV);
4216 SvNVX(dstr) = SvNVX(sstr);
4217 (void)SvNOK_only(dstr);
4218 if (SvTAINTED(sstr))
4226 sv_upgrade(dstr, SVt_RV);
4227 else if (dtype == SVt_PVGV &&
4228 SvROK(sstr) && SvTYPE(SvRV(sstr)) == SVt_PVGV) {
4231 if (GvIMPORTED(dstr) != GVf_IMPORTED
4232 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
4234 GvIMPORTED_on(dstr);
4243 #ifdef PERL_COPY_ON_WRITE
4244 if ((SvFLAGS(sstr) & CAN_COW_MASK) == CAN_COW_FLAGS) {
4245 if (dtype < SVt_PVIV)
4246 sv_upgrade(dstr, SVt_PVIV);
4253 sv_upgrade(dstr, SVt_PV);
4256 if (dtype < SVt_PVIV)
4257 sv_upgrade(dstr, SVt_PVIV);
4260 if (dtype < SVt_PVNV)
4261 sv_upgrade(dstr, SVt_PVNV);
4268 Perl_croak(aTHX_ "Bizarre copy of %s in %s", sv_reftype(sstr, 0),
4271 Perl_croak(aTHX_ "Bizarre copy of %s", sv_reftype(sstr, 0));
4275 if (dtype <= SVt_PVGV) {
4277 if (dtype != SVt_PVGV) {
4278 char *name = GvNAME(sstr);
4279 STRLEN len = GvNAMELEN(sstr);
4280 /* don't upgrade SVt_PVLV: it can hold a glob */
4281 if (dtype != SVt_PVLV)
4282 sv_upgrade(dstr, SVt_PVGV);
4283 sv_magic(dstr, dstr, PERL_MAGIC_glob, Nullch, 0);
4284 GvSTASH(dstr) = (HV*)SvREFCNT_inc(GvSTASH(sstr));
4285 GvNAME(dstr) = savepvn(name, len);
4286 GvNAMELEN(dstr) = len;
4287 SvFAKE_on(dstr); /* can coerce to non-glob */
4289 /* ahem, death to those who redefine active sort subs */
4290 else if (PL_curstackinfo->si_type == PERLSI_SORT
4291 && GvCV(dstr) && PL_sortcop == CvSTART(GvCV(dstr)))
4292 Perl_croak(aTHX_ "Can't redefine active sort subroutine %s",
4295 #ifdef GV_UNIQUE_CHECK
4296 if (GvUNIQUE((GV*)dstr)) {
4297 Perl_croak(aTHX_ PL_no_modify);
4301 (void)SvOK_off(dstr);
4302 GvINTRO_off(dstr); /* one-shot flag */
4304 GvGP(dstr) = gp_ref(GvGP(sstr));
4305 if (SvTAINTED(sstr))
4307 if (GvIMPORTED(dstr) != GVf_IMPORTED
4308 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
4310 GvIMPORTED_on(dstr);
4318 if (SvGMAGICAL(sstr) && (flags & SV_GMAGIC)) {
4320 if ((int)SvTYPE(sstr) != stype) {
4321 stype = SvTYPE(sstr);
4322 if (stype == SVt_PVGV && dtype <= SVt_PVGV)
4326 if (stype == SVt_PVLV)
4327 (void)SvUPGRADE(dstr, SVt_PVNV);
4329 (void)SvUPGRADE(dstr, (U32)stype);
4332 sflags = SvFLAGS(sstr);
4334 if (sflags & SVf_ROK) {
4335 if (dtype >= SVt_PV) {
4336 if (dtype == SVt_PVGV) {
4337 SV *sref = SvREFCNT_inc(SvRV(sstr));
4339 int intro = GvINTRO(dstr);
4341 #ifdef GV_UNIQUE_CHECK
4342 if (GvUNIQUE((GV*)dstr)) {
4343 Perl_croak(aTHX_ PL_no_modify);
4348 GvINTRO_off(dstr); /* one-shot flag */
4349 GvLINE(dstr) = CopLINE(PL_curcop);
4350 GvEGV(dstr) = (GV*)dstr;
4353 switch (SvTYPE(sref)) {
4356 SAVEGENERICSV(GvAV(dstr));
4358 dref = (SV*)GvAV(dstr);
4359 GvAV(dstr) = (AV*)sref;
4360 if (!GvIMPORTED_AV(dstr)
4361 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
4363 GvIMPORTED_AV_on(dstr);
4368 SAVEGENERICSV(GvHV(dstr));
4370 dref = (SV*)GvHV(dstr);
4371 GvHV(dstr) = (HV*)sref;
4372 if (!GvIMPORTED_HV(dstr)
4373 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
4375 GvIMPORTED_HV_on(dstr);
4380 if (GvCVGEN(dstr) && GvCV(dstr) != (CV*)sref) {
4381 SvREFCNT_dec(GvCV(dstr));
4382 GvCV(dstr) = Nullcv;
4383 GvCVGEN(dstr) = 0; /* Switch off cacheness. */
4384 PL_sub_generation++;
4386 SAVEGENERICSV(GvCV(dstr));
4389 dref = (SV*)GvCV(dstr);
4390 if (GvCV(dstr) != (CV*)sref) {
4391 CV* cv = GvCV(dstr);
4393 if (!GvCVGEN((GV*)dstr) &&
4394 (CvROOT(cv) || CvXSUB(cv)))
4396 /* ahem, death to those who redefine
4397 * active sort subs */
4398 if (PL_curstackinfo->si_type == PERLSI_SORT &&
4399 PL_sortcop == CvSTART(cv))
4401 "Can't redefine active sort subroutine %s",
4402 GvENAME((GV*)dstr));
4403 /* Redefining a sub - warning is mandatory if
4404 it was a const and its value changed. */
4405 if (ckWARN(WARN_REDEFINE)
4407 && (!CvCONST((CV*)sref)
4408 || sv_cmp(cv_const_sv(cv),
4409 cv_const_sv((CV*)sref)))))
4411 Perl_warner(aTHX_ packWARN(WARN_REDEFINE),
4413 ? "Constant subroutine %s::%s redefined"
4414 : "Subroutine %s::%s redefined",
4415 HvNAME(GvSTASH((GV*)dstr)),
4416 GvENAME((GV*)dstr));
4420 cv_ckproto(cv, (GV*)dstr,
4421 SvPOK(sref) ? SvPVX(sref) : Nullch);
4423 GvCV(dstr) = (CV*)sref;
4424 GvCVGEN(dstr) = 0; /* Switch off cacheness. */
4425 GvASSUMECV_on(dstr);
4426 PL_sub_generation++;
4428 if (!GvIMPORTED_CV(dstr)
4429 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
4431 GvIMPORTED_CV_on(dstr);
4436 SAVEGENERICSV(GvIOp(dstr));
4438 dref = (SV*)GvIOp(dstr);
4439 GvIOp(dstr) = (IO*)sref;
4443 SAVEGENERICSV(GvFORM(dstr));
4445 dref = (SV*)GvFORM(dstr);
4446 GvFORM(dstr) = (CV*)sref;
4450 SAVEGENERICSV(GvSV(dstr));
4452 dref = (SV*)GvSV(dstr);
4454 if (!GvIMPORTED_SV(dstr)
4455 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
4457 GvIMPORTED_SV_on(dstr);
4463 if (SvTAINTED(sstr))
4468 (void)SvOOK_off(dstr); /* backoff */
4470 Safefree(SvPVX(dstr));
4471 SvLEN(dstr)=SvCUR(dstr)=0;
4474 (void)SvOK_off(dstr);
4475 SvRV(dstr) = SvREFCNT_inc(SvRV(sstr));
4477 if (sflags & SVp_NOK) {
4479 /* Only set the public OK flag if the source has public OK. */
4480 if (sflags & SVf_NOK)
4481 SvFLAGS(dstr) |= SVf_NOK;
4482 SvNVX(dstr) = SvNVX(sstr);
4484 if (sflags & SVp_IOK) {
4485 (void)SvIOKp_on(dstr);
4486 if (sflags & SVf_IOK)
4487 SvFLAGS(dstr) |= SVf_IOK;
4488 if (sflags & SVf_IVisUV)
4490 SvIVX(dstr) = SvIVX(sstr);
4492 if (SvAMAGIC(sstr)) {
4496 else if (sflags & SVp_POK) {
4500 * Check to see if we can just swipe the string. If so, it's a
4501 * possible small lose on short strings, but a big win on long ones.
4502 * It might even be a win on short strings if SvPVX(dstr)
4503 * has to be allocated and SvPVX(sstr) has to be freed.
4506 /* Whichever path we take through the next code, we want this true,
4507 and doing it now facilitates the COW check. */
4508 (void)SvPOK_only(dstr);
4511 #ifdef PERL_COPY_ON_WRITE
4512 (sflags & (SVf_FAKE | SVf_READONLY)) != (SVf_FAKE | SVf_READONLY)
4516 (sflags & SVs_TEMP) && /* slated for free anyway? */
4517 !(sflags & SVf_OOK) && /* and not involved in OOK hack? */
4518 (!(flags & SV_NOSTEAL)) &&
4519 /* and we're allowed to steal temps */
4520 SvREFCNT(sstr) == 1 && /* and no other references to it? */
4521 SvLEN(sstr) && /* and really is a string */
4522 /* and won't be needed again, potentially */
4523 !(PL_op && PL_op->op_type == OP_AASSIGN))
4524 #ifdef PERL_COPY_ON_WRITE
4525 && !((sflags & CAN_COW_MASK) == CAN_COW_FLAGS
4526 && (SvFLAGS(dstr) & CAN_COW_MASK) == CAN_COW_FLAGS
4527 && SvTYPE(sstr) >= SVt_PVIV)
4530 /* Failed the swipe test, and it's not a shared hash key either.
4531 Have to copy the string. */
4532 STRLEN len = SvCUR(sstr);
4533 SvGROW(dstr, len + 1); /* inlined from sv_setpvn */
4534 Move(SvPVX(sstr),SvPVX(dstr),len,char);
4535 SvCUR_set(dstr, len);
4536 *SvEND(dstr) = '\0';
4538 /* If PERL_COPY_ON_WRITE is not defined, then isSwipe will always
4540 #ifdef PERL_COPY_ON_WRITE
4541 /* Either it's a shared hash key, or it's suitable for
4542 copy-on-write or we can swipe the string. */
4544 PerlIO_printf(Perl_debug_log, "Copy on write: sstr --> dstr\n");
4549 /* I believe I should acquire a global SV mutex if
4550 it's a COW sv (not a shared hash key) to stop
4551 it going un copy-on-write.
4552 If the source SV has gone un copy on write between up there
4553 and down here, then (assert() that) it is of the correct
4554 form to make it copy on write again */
4555 if ((sflags & (SVf_FAKE | SVf_READONLY))
4556 != (SVf_FAKE | SVf_READONLY)) {
4557 SvREADONLY_on(sstr);
4559 /* Make the source SV into a loop of 1.
4560 (about to become 2) */
4561 SV_COW_NEXT_SV_SET(sstr, sstr);
4565 /* Initial code is common. */
4566 if (SvPVX(dstr)) { /* we know that dtype >= SVt_PV */
4568 SvFLAGS(dstr) &= ~SVf_OOK;
4569 Safefree(SvPVX(dstr) - SvIVX(dstr));
4571 else if (SvLEN(dstr))
4572 Safefree(SvPVX(dstr));
4575 #ifdef PERL_COPY_ON_WRITE
4577 /* making another shared SV. */
4578 STRLEN cur = SvCUR(sstr);
4579 STRLEN len = SvLEN(sstr);
4580 assert (SvTYPE(dstr) >= SVt_PVIV);
4582 /* SvIsCOW_normal */
4583 /* splice us in between source and next-after-source. */
4584 SV_COW_NEXT_SV_SET(dstr, SV_COW_NEXT_SV(sstr));
4585 SV_COW_NEXT_SV_SET(sstr, dstr);
4586 SvPV_set(dstr, SvPVX(sstr));
4588 /* SvIsCOW_shared_hash */
4589 UV hash = SvUVX(sstr);
4590 DEBUG_C(PerlIO_printf(Perl_debug_log,
4591 "Copy on write: Sharing hash\n"));
4593 sharepvn(SvPVX(sstr),
4594 (sflags & SVf_UTF8?-cur:cur), hash));
4599 SvREADONLY_on(dstr);
4601 /* Relesase a global SV mutex. */
4605 { /* Passes the swipe test. */
4606 SvPV_set(dstr, SvPVX(sstr));
4607 SvLEN_set(dstr, SvLEN(sstr));
4608 SvCUR_set(dstr, SvCUR(sstr));
4611 (void)SvOK_off(sstr); /* NOTE: nukes most SvFLAGS on sstr */
4612 SvPV_set(sstr, Nullch);
4618 if (sflags & SVf_UTF8)
4621 if (sflags & SVp_NOK) {
4623 if (sflags & SVf_NOK)
4624 SvFLAGS(dstr) |= SVf_NOK;
4625 SvNVX(dstr) = SvNVX(sstr);
4627 if (sflags & SVp_IOK) {
4628 (void)SvIOKp_on(dstr);
4629 if (sflags & SVf_IOK)
4630 SvFLAGS(dstr) |= SVf_IOK;
4631 if (sflags & SVf_IVisUV)
4633 SvIVX(dstr) = SvIVX(sstr);
4636 MAGIC *smg = mg_find(sstr,PERL_MAGIC_vstring);
4637 sv_magic(dstr, NULL, PERL_MAGIC_vstring,
4638 smg->mg_ptr, smg->mg_len);
4639 SvRMAGICAL_on(dstr);
4642 else if (sflags & SVp_IOK) {
4643 if (sflags & SVf_IOK)
4644 (void)SvIOK_only(dstr);
4646 (void)SvOK_off(dstr);
4647 (void)SvIOKp_on(dstr);
4649 /* XXXX Do we want to set IsUV for IV(ROK)? Be extra safe... */
4650 if (sflags & SVf_IVisUV)
4652 SvIVX(dstr) = SvIVX(sstr);
4653 if (sflags & SVp_NOK) {
4654 if (sflags & SVf_NOK)
4655 (void)SvNOK_on(dstr);
4657 (void)SvNOKp_on(dstr);
4658 SvNVX(dstr) = SvNVX(sstr);
4661 else if (sflags & SVp_NOK) {
4662 if (sflags & SVf_NOK)
4663 (void)SvNOK_only(dstr);
4665 (void)SvOK_off(dstr);
4668 SvNVX(dstr) = SvNVX(sstr);
4671 if (dtype == SVt_PVGV) {
4672 if (ckWARN(WARN_MISC))
4673 Perl_warner(aTHX_ packWARN(WARN_MISC), "Undefined value assigned to typeglob");
4676 (void)SvOK_off(dstr);
4678 if (SvTAINTED(sstr))
4683 =for apidoc sv_setsv_mg
4685 Like C<sv_setsv>, but also handles 'set' magic.
4691 Perl_sv_setsv_mg(pTHX_ SV *dstr, register SV *sstr)
4693 sv_setsv(dstr,sstr);
4697 #ifdef PERL_COPY_ON_WRITE
4699 Perl_sv_setsv_cow(pTHX_ SV *dstr, SV *sstr)
4701 STRLEN cur = SvCUR(sstr);
4702 STRLEN len = SvLEN(sstr);
4703 register char *new_pv;
4706 PerlIO_printf(Perl_debug_log, "Fast copy on write: %p -> %p\n",
4714 if (SvTHINKFIRST(dstr))
4715 sv_force_normal_flags(dstr, SV_COW_DROP_PV);
4716 else if (SvPVX(dstr))
4717 Safefree(SvPVX(dstr));
4721 (void)SvUPGRADE (dstr, SVt_PVIV);
4723 assert (SvPOK(sstr));
4724 assert (SvPOKp(sstr));
4725 assert (!SvIOK(sstr));
4726 assert (!SvIOKp(sstr));
4727 assert (!SvNOK(sstr));
4728 assert (!SvNOKp(sstr));
4730 if (SvIsCOW(sstr)) {
4732 if (SvLEN(sstr) == 0) {
4733 /* source is a COW shared hash key. */
4734 UV hash = SvUVX(sstr);
4735 DEBUG_C(PerlIO_printf(Perl_debug_log,
4736 "Fast copy on write: Sharing hash\n"));
4738 new_pv = sharepvn(SvPVX(sstr), (SvUTF8(sstr)?-cur:cur), hash);
4741 SV_COW_NEXT_SV_SET(dstr, SV_COW_NEXT_SV(sstr));
4743 assert ((SvFLAGS(sstr) & CAN_COW_MASK) == CAN_COW_FLAGS);
4744 (void)SvUPGRADE (sstr, SVt_PVIV);
4745 SvREADONLY_on(sstr);
4747 DEBUG_C(PerlIO_printf(Perl_debug_log,
4748 "Fast copy on write: Converting sstr to COW\n"));
4749 SV_COW_NEXT_SV_SET(dstr, sstr);
4751 SV_COW_NEXT_SV_SET(sstr, dstr);
4752 new_pv = SvPVX(sstr);
4755 SvPV_set(dstr, new_pv);
4756 SvFLAGS(dstr) = (SVt_PVIV|SVf_POK|SVp_POK|SVf_FAKE|SVf_READONLY);
4769 =for apidoc sv_setpvn
4771 Copies a string into an SV. The C<len> parameter indicates the number of
4772 bytes to be copied. If the C<ptr> argument is NULL the SV will become
4773 undefined. Does not handle 'set' magic. See C<sv_setpvn_mg>.
4779 Perl_sv_setpvn(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
4781 register char *dptr;
4783 SV_CHECK_THINKFIRST_COW_DROP(sv);
4789 /* len is STRLEN which is unsigned, need to copy to signed */
4792 Perl_croak(aTHX_ "panic: sv_setpvn called with negative strlen");
4794 (void)SvUPGRADE(sv, SVt_PV);
4796 SvGROW(sv, len + 1);
4798 Move(ptr,dptr,len,char);
4801 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4806 =for apidoc sv_setpvn_mg
4808 Like C<sv_setpvn>, but also handles 'set' magic.
4814 Perl_sv_setpvn_mg(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
4816 sv_setpvn(sv,ptr,len);
4821 =for apidoc sv_setpv
4823 Copies a string into an SV. The string must be null-terminated. Does not
4824 handle 'set' magic. See C<sv_setpv_mg>.
4830 Perl_sv_setpv(pTHX_ register SV *sv, register const char *ptr)
4832 register STRLEN len;
4834 SV_CHECK_THINKFIRST_COW_DROP(sv);
4840 (void)SvUPGRADE(sv, SVt_PV);
4842 SvGROW(sv, len + 1);
4843 Move(ptr,SvPVX(sv),len+1,char);
4845 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4850 =for apidoc sv_setpv_mg
4852 Like C<sv_setpv>, but also handles 'set' magic.
4858 Perl_sv_setpv_mg(pTHX_ register SV *sv, register const char *ptr)
4865 =for apidoc sv_usepvn
4867 Tells an SV to use C<ptr> to find its string value. Normally the string is
4868 stored inside the SV but sv_usepvn allows the SV to use an outside string.
4869 The C<ptr> should point to memory that was allocated by C<malloc>. The
4870 string length, C<len>, must be supplied. This function will realloc the
4871 memory pointed to by C<ptr>, so that pointer should not be freed or used by
4872 the programmer after giving it to sv_usepvn. Does not handle 'set' magic.
4873 See C<sv_usepvn_mg>.
4879 Perl_sv_usepvn(pTHX_ register SV *sv, register char *ptr, register STRLEN len)
4881 SV_CHECK_THINKFIRST_COW_DROP(sv);
4882 (void)SvUPGRADE(sv, SVt_PV);
4887 (void)SvOOK_off(sv);
4888 if (SvPVX(sv) && SvLEN(sv))
4889 Safefree(SvPVX(sv));
4890 Renew(ptr, len+1, char);
4893 SvLEN_set(sv, len+1);
4895 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4900 =for apidoc sv_usepvn_mg
4902 Like C<sv_usepvn>, but also handles 'set' magic.
4908 Perl_sv_usepvn_mg(pTHX_ register SV *sv, register char *ptr, register STRLEN len)
4910 sv_usepvn(sv,ptr,len);
4914 #ifdef PERL_COPY_ON_WRITE
4915 /* Need to do this *after* making the SV normal, as we need the buffer
4916 pointer to remain valid until after we've copied it. If we let go too early,
4917 another thread could invalidate it by unsharing last of the same hash key
4918 (which it can do by means other than releasing copy-on-write Svs)
4919 or by changing the other copy-on-write SVs in the loop. */
4921 S_sv_release_COW(pTHX_ register SV *sv, char *pvx, STRLEN cur, STRLEN len,
4922 U32 hash, SV *after)
4924 if (len) { /* this SV was SvIsCOW_normal(sv) */
4925 /* we need to find the SV pointing to us. */
4926 SV *current = SV_COW_NEXT_SV(after);
4928 if (current == sv) {
4929 /* The SV we point to points back to us (there were only two of us
4931 Hence other SV is no longer copy on write either. */
4933 SvREADONLY_off(after);
4935 /* We need to follow the pointers around the loop. */
4937 while ((next = SV_COW_NEXT_SV(current)) != sv) {
4940 /* don't loop forever if the structure is bust, and we have
4941 a pointer into a closed loop. */
4942 assert (current != after);
4943 assert (SvPVX(current) == pvx);
4945 /* Make the SV before us point to the SV after us. */
4946 SV_COW_NEXT_SV_SET(current, after);
4949 unsharepvn(pvx, SvUTF8(sv) ? -(I32)cur : cur, hash);
4954 Perl_sv_release_IVX(pTHX_ register SV *sv)
4957 sv_force_normal_flags(sv, 0);
4963 =for apidoc sv_force_normal_flags
4965 Undo various types of fakery on an SV: if the PV is a shared string, make
4966 a private copy; if we're a ref, stop refing; if we're a glob, downgrade to
4967 an xpvmg; if we're a copy-on-write scalar, this is the on-write time when
4968 we do the copy, and is also used locally. If C<SV_COW_DROP_PV> is set
4969 then a copy-on-write scalar drops its PV buffer (if any) and becomes
4970 SvPOK_off rather than making a copy. (Used where this scalar is about to be
4971 set to some other value.) In addition, the C<flags> parameter gets passed to
4972 C<sv_unref_flags()> when unrefing. C<sv_force_normal> calls this function
4973 with flags set to 0.
4979 Perl_sv_force_normal_flags(pTHX_ register SV *sv, U32 flags)
4981 #ifdef PERL_COPY_ON_WRITE
4982 if (SvREADONLY(sv)) {
4983 /* At this point I believe I should acquire a global SV mutex. */
4985 char *pvx = SvPVX(sv);
4986 STRLEN len = SvLEN(sv);
4987 STRLEN cur = SvCUR(sv);
4988 U32 hash = SvUVX(sv);
4989 SV *next = SV_COW_NEXT_SV(sv); /* next COW sv in the loop. */
4991 PerlIO_printf(Perl_debug_log,
4992 "Copy on write: Force normal %ld\n",
4998 /* This SV doesn't own the buffer, so need to New() a new one: */
5001 if (flags & SV_COW_DROP_PV) {
5002 /* OK, so we don't need to copy our buffer. */
5005 SvGROW(sv, cur + 1);
5006 Move(pvx,SvPVX(sv),cur,char);
5010 sv_release_COW(sv, pvx, cur, len, hash, next);
5015 else if (IN_PERL_RUNTIME)
5016 Perl_croak(aTHX_ PL_no_modify);
5017 /* At this point I believe that I can drop the global SV mutex. */
5020 if (SvREADONLY(sv)) {
5022 char *pvx = SvPVX(sv);
5023 int is_utf8 = SvUTF8(sv);
5024 STRLEN len = SvCUR(sv);
5025 U32 hash = SvUVX(sv);
5030 SvGROW(sv, len + 1);
5031 Move(pvx,SvPVX(sv),len,char);
5033 unsharepvn(pvx, is_utf8 ? -(I32)len : len, hash);
5035 else if (IN_PERL_RUNTIME)
5036 Perl_croak(aTHX_ PL_no_modify);
5040 sv_unref_flags(sv, flags);
5041 else if (SvFAKE(sv) && SvTYPE(sv) == SVt_PVGV)
5046 =for apidoc sv_force_normal
5048 Undo various types of fakery on an SV: if the PV is a shared string, make
5049 a private copy; if we're a ref, stop refing; if we're a glob, downgrade to
5050 an xpvmg. See also C<sv_force_normal_flags>.
5056 Perl_sv_force_normal(pTHX_ register SV *sv)
5058 sv_force_normal_flags(sv, 0);
5064 Efficient removal of characters from the beginning of the string buffer.
5065 SvPOK(sv) must be true and the C<ptr> must be a pointer to somewhere inside
5066 the string buffer. The C<ptr> becomes the first character of the adjusted
5067 string. Uses the "OOK hack".
5068 Beware: after this function returns, C<ptr> and SvPVX(sv) may no longer
5069 refer to the same chunk of data.
5075 Perl_sv_chop(pTHX_ register SV *sv, register char *ptr)
5077 register STRLEN delta;
5078 if (!ptr || !SvPOKp(sv))
5080 delta = ptr - SvPVX(sv);
5081 SV_CHECK_THINKFIRST(sv);
5082 if (SvTYPE(sv) < SVt_PVIV)
5083 sv_upgrade(sv,SVt_PVIV);
5086 if (!SvLEN(sv)) { /* make copy of shared string */
5087 char *pvx = SvPVX(sv);
5088 STRLEN len = SvCUR(sv);
5089 SvGROW(sv, len + 1);
5090 Move(pvx,SvPVX(sv),len,char);
5094 /* Same SvOOK_on but SvOOK_on does a SvIOK_off
5095 and we do that anyway inside the SvNIOK_off
5097 SvFLAGS(sv) |= SVf_OOK;
5106 /* sv_catpvn() is now a macro using Perl_sv_catpvn_flags();
5107 * this function provided for binary compatibility only
5111 Perl_sv_catpvn(pTHX_ SV *dsv, const char* sstr, STRLEN slen)
5113 sv_catpvn_flags(dsv, sstr, slen, SV_GMAGIC);
5117 =for apidoc sv_catpvn
5119 Concatenates the string onto the end of the string which is in the SV. The
5120 C<len> indicates number of bytes to copy. If the SV has the UTF-8
5121 status set, then the bytes appended should be valid UTF-8.
5122 Handles 'get' magic, but not 'set' magic. See C<sv_catpvn_mg>.
5124 =for apidoc sv_catpvn_flags
5126 Concatenates the string onto the end of the string which is in the SV. The
5127 C<len> indicates number of bytes to copy. If the SV has the UTF-8
5128 status set, then the bytes appended should be valid UTF-8.
5129 If C<flags> has C<SV_GMAGIC> bit set, will C<mg_get> on C<dsv> if
5130 appropriate, else not. C<sv_catpvn> and C<sv_catpvn_nomg> are implemented
5131 in terms of this function.
5137 Perl_sv_catpvn_flags(pTHX_ register SV *dsv, register const char *sstr, register STRLEN slen, I32 flags)
5142 dstr = SvPV_force_flags(dsv, dlen, flags);
5143 SvGROW(dsv, dlen + slen + 1);
5146 Move(sstr, SvPVX(dsv) + dlen, slen, char);
5149 (void)SvPOK_only_UTF8(dsv); /* validate pointer */
5154 =for apidoc sv_catpvn_mg
5156 Like C<sv_catpvn>, but also handles 'set' magic.
5162 Perl_sv_catpvn_mg(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
5164 sv_catpvn(sv,ptr,len);
5168 /* sv_catsv() is now a macro using Perl_sv_catsv_flags();
5169 * this function provided for binary compatibility only
5173 Perl_sv_catsv(pTHX_ SV *dstr, register SV *sstr)
5175 sv_catsv_flags(dstr, sstr, SV_GMAGIC);
5179 =for apidoc sv_catsv
5181 Concatenates the string from SV C<ssv> onto the end of the string in
5182 SV C<dsv>. Modifies C<dsv> but not C<ssv>. Handles 'get' magic, but
5183 not 'set' magic. See C<sv_catsv_mg>.
5185 =for apidoc sv_catsv_flags
5187 Concatenates the string from SV C<ssv> onto the end of the string in
5188 SV C<dsv>. Modifies C<dsv> but not C<ssv>. If C<flags> has C<SV_GMAGIC>
5189 bit set, will C<mg_get> on the SVs if appropriate, else not. C<sv_catsv>
5190 and C<sv_catsv_nomg> are implemented in terms of this function.
5195 Perl_sv_catsv_flags(pTHX_ SV *dsv, register SV *ssv, I32 flags)
5201 if ((spv = SvPV(ssv, slen))) {
5202 /* sutf8 and dutf8 were type bool, but under USE_ITHREADS,
5203 gcc version 2.95.2 20000220 (Debian GNU/Linux) for
5204 Linux xxx 2.2.17 on sparc64 with gcc -O2, we erroneously
5205 get dutf8 = 0x20000000, (i.e. SVf_UTF8) even though
5206 dsv->sv_flags doesn't have that bit set.
5207 Andy Dougherty 12 Oct 2001
5209 I32 sutf8 = DO_UTF8(ssv);
5212 if (SvGMAGICAL(dsv) && (flags & SV_GMAGIC))
5214 dutf8 = DO_UTF8(dsv);
5216 if (dutf8 != sutf8) {
5218 /* Not modifying source SV, so taking a temporary copy. */
5219 SV* csv = sv_2mortal(newSVpvn(spv, slen));
5221 sv_utf8_upgrade(csv);
5222 spv = SvPV(csv, slen);
5225 sv_utf8_upgrade_nomg(dsv);
5227 sv_catpvn_nomg(dsv, spv, slen);
5232 =for apidoc sv_catsv_mg
5234 Like C<sv_catsv>, but also handles 'set' magic.
5240 Perl_sv_catsv_mg(pTHX_ SV *dsv, register SV *ssv)
5247 =for apidoc sv_catpv
5249 Concatenates the string onto the end of the string which is in the SV.
5250 If the SV has the UTF-8 status set, then the bytes appended should be
5251 valid UTF-8. Handles 'get' magic, but not 'set' magic. See C<sv_catpv_mg>.
5256 Perl_sv_catpv(pTHX_ register SV *sv, register const char *ptr)
5258 register STRLEN len;
5264 junk = SvPV_force(sv, tlen);
5266 SvGROW(sv, tlen + len + 1);
5269 Move(ptr,SvPVX(sv)+tlen,len+1,char);
5271 (void)SvPOK_only_UTF8(sv); /* validate pointer */
5276 =for apidoc sv_catpv_mg
5278 Like C<sv_catpv>, but also handles 'set' magic.
5284 Perl_sv_catpv_mg(pTHX_ register SV *sv, register const char *ptr)
5293 Create a new null SV, or if len > 0, create a new empty SVt_PV type SV
5294 with an initial PV allocation of len+1. Normally accessed via the C<NEWSV>
5301 Perl_newSV(pTHX_ STRLEN len)
5307 sv_upgrade(sv, SVt_PV);
5308 SvGROW(sv, len + 1);
5313 =for apidoc sv_magicext
5315 Adds magic to an SV, upgrading it if necessary. Applies the
5316 supplied vtable and returns a pointer to the magic added.
5318 Note that C<sv_magicext> will allow things that C<sv_magic> will not.
5319 In particular, you can add magic to SvREADONLY SVs, and add more than
5320 one instance of the same 'how'.
5322 If C<namlen> is greater than zero then a C<savepvn> I<copy> of C<name> is
5323 stored, if C<namlen> is zero then C<name> is stored as-is and - as another
5324 special case - if C<(name && namlen == HEf_SVKEY)> then C<name> is assumed
5325 to contain an C<SV*> and is stored as-is with its REFCNT incremented.
5327 (This is now used as a subroutine by C<sv_magic>.)
5332 Perl_sv_magicext(pTHX_ SV* sv, SV* obj, int how, MGVTBL *vtable,
5333 const char* name, I32 namlen)
5337 if (SvTYPE(sv) < SVt_PVMG) {
5338 (void)SvUPGRADE(sv, SVt_PVMG);
5340 Newz(702,mg, 1, MAGIC);
5341 mg->mg_moremagic = SvMAGIC(sv);
5344 /* Some magic sontains a reference loop, where the sv and object refer to
5345 each other. To prevent a reference loop that would prevent such
5346 objects being freed, we look for such loops and if we find one we
5347 avoid incrementing the object refcount.
5349 Note we cannot do this to avoid self-tie loops as intervening RV must
5350 have its REFCNT incremented to keep it in existence.
5353 if (!obj || obj == sv ||
5354 how == PERL_MAGIC_arylen ||
5355 how == PERL_MAGIC_qr ||
5356 (SvTYPE(obj) == SVt_PVGV &&
5357 (GvSV(obj) == sv || GvHV(obj) == (HV*)sv || GvAV(obj) == (AV*)sv ||
5358 GvCV(obj) == (CV*)sv || GvIOp(obj) == (IO*)sv ||
5359 GvFORM(obj) == (CV*)sv)))
5364 mg->mg_obj = SvREFCNT_inc(obj);
5365 mg->mg_flags |= MGf_REFCOUNTED;
5368 /* Normal self-ties simply pass a null object, and instead of
5369 using mg_obj directly, use the SvTIED_obj macro to produce a
5370 new RV as needed. For glob "self-ties", we are tieing the PVIO
5371 with an RV obj pointing to the glob containing the PVIO. In
5372 this case, to avoid a reference loop, we need to weaken the
5376 if (how == PERL_MAGIC_tiedscalar && SvTYPE(sv) == SVt_PVIO &&
5377 obj && SvROK(obj) && GvIO(SvRV(obj)) == (IO*)sv)
5383 mg->mg_len = namlen;
5386 mg->mg_ptr = savepvn(name, namlen);
5387 else if (namlen == HEf_SVKEY)
5388 mg->mg_ptr = (char*)SvREFCNT_inc((SV*)name);
5390 mg->mg_ptr = (char *) name;
5392 mg->mg_virtual = vtable;
5396 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
5401 =for apidoc sv_magic
5403 Adds magic to an SV. First upgrades C<sv> to type C<SVt_PVMG> if necessary,
5404 then adds a new magic item of type C<how> to the head of the magic list.
5406 See C<sv_magicext> (which C<sv_magic> now calls) for a description of the
5407 handling of the C<name> and C<namlen> arguments.
5409 You need to use C<sv_magicext> to add magic to SvREADONLY SVs and also
5410 to add more than one instance of the same 'how'.
5416 Perl_sv_magic(pTHX_ register SV *sv, SV *obj, int how, const char *name, I32 namlen)
5421 #ifdef PERL_COPY_ON_WRITE
5423 sv_force_normal_flags(sv, 0);
5425 if (SvREADONLY(sv)) {
5427 && how != PERL_MAGIC_regex_global
5428 && how != PERL_MAGIC_bm
5429 && how != PERL_MAGIC_fm
5430 && how != PERL_MAGIC_sv
5431 && how != PERL_MAGIC_backref
5434 Perl_croak(aTHX_ PL_no_modify);
5437 if (SvMAGICAL(sv) || (how == PERL_MAGIC_taint && SvTYPE(sv) >= SVt_PVMG)) {
5438 if (SvMAGIC(sv) && (mg = mg_find(sv, how))) {
5439 /* sv_magic() refuses to add a magic of the same 'how' as an
5442 if (how == PERL_MAGIC_taint)
5450 vtable = &PL_vtbl_sv;
5452 case PERL_MAGIC_overload:
5453 vtable = &PL_vtbl_amagic;
5455 case PERL_MAGIC_overload_elem:
5456 vtable = &PL_vtbl_amagicelem;
5458 case PERL_MAGIC_overload_table:
5459 vtable = &PL_vtbl_ovrld;
5462 vtable = &PL_vtbl_bm;
5464 case PERL_MAGIC_regdata:
5465 vtable = &PL_vtbl_regdata;
5467 case PERL_MAGIC_regdatum:
5468 vtable = &PL_vtbl_regdatum;
5470 case PERL_MAGIC_env:
5471 vtable = &PL_vtbl_env;
5474 vtable = &PL_vtbl_fm;
5476 case PERL_MAGIC_envelem:
5477 vtable = &PL_vtbl_envelem;
5479 case PERL_MAGIC_regex_global:
5480 vtable = &PL_vtbl_mglob;
5482 case PERL_MAGIC_isa:
5483 vtable = &PL_vtbl_isa;
5485 case PERL_MAGIC_isaelem:
5486 vtable = &PL_vtbl_isaelem;
5488 case PERL_MAGIC_nkeys:
5489 vtable = &PL_vtbl_nkeys;
5491 case PERL_MAGIC_dbfile:
5494 case PERL_MAGIC_dbline:
5495 vtable = &PL_vtbl_dbline;
5497 #ifdef USE_LOCALE_COLLATE
5498 case PERL_MAGIC_collxfrm:
5499 vtable = &PL_vtbl_collxfrm;
5501 #endif /* USE_LOCALE_COLLATE */
5502 case PERL_MAGIC_tied:
5503 vtable = &PL_vtbl_pack;
5505 case PERL_MAGIC_tiedelem:
5506 case PERL_MAGIC_tiedscalar:
5507 vtable = &PL_vtbl_packelem;
5510 vtable = &PL_vtbl_regexp;
5512 case PERL_MAGIC_sig:
5513 vtable = &PL_vtbl_sig;
5515 case PERL_MAGIC_sigelem:
5516 vtable = &PL_vtbl_sigelem;
5518 case PERL_MAGIC_taint:
5519 vtable = &PL_vtbl_taint;
5521 case PERL_MAGIC_uvar:
5522 vtable = &PL_vtbl_uvar;
5524 case PERL_MAGIC_vec:
5525 vtable = &PL_vtbl_vec;
5527 case PERL_MAGIC_vstring:
5530 case PERL_MAGIC_utf8:
5531 vtable = &PL_vtbl_utf8;
5533 case PERL_MAGIC_substr:
5534 vtable = &PL_vtbl_substr;
5536 case PERL_MAGIC_defelem:
5537 vtable = &PL_vtbl_defelem;
5539 case PERL_MAGIC_glob:
5540 vtable = &PL_vtbl_glob;
5542 case PERL_MAGIC_arylen:
5543 vtable = &PL_vtbl_arylen;
5545 case PERL_MAGIC_pos:
5546 vtable = &PL_vtbl_pos;
5548 case PERL_MAGIC_backref:
5549 vtable = &PL_vtbl_backref;
5551 case PERL_MAGIC_ext:
5552 /* Reserved for use by extensions not perl internals. */
5553 /* Useful for attaching extension internal data to perl vars. */
5554 /* Note that multiple extensions may clash if magical scalars */
5555 /* etc holding private data from one are passed to another. */
5558 Perl_croak(aTHX_ "Don't know how to handle magic of type \\%o", how);
5561 /* Rest of work is done else where */
5562 mg = sv_magicext(sv,obj,how,vtable,name,namlen);
5565 case PERL_MAGIC_taint:
5568 case PERL_MAGIC_ext:
5569 case PERL_MAGIC_dbfile:
5576 =for apidoc sv_unmagic
5578 Removes all magic of type C<type> from an SV.
5584 Perl_sv_unmagic(pTHX_ SV *sv, int type)
5588 if (SvTYPE(sv) < SVt_PVMG || !SvMAGIC(sv))
5591 for (mg = *mgp; mg; mg = *mgp) {
5592 if (mg->mg_type == type) {
5593 MGVTBL* vtbl = mg->mg_virtual;
5594 *mgp = mg->mg_moremagic;
5595 if (vtbl && vtbl->svt_free)
5596 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
5597 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
5599 Safefree(mg->mg_ptr);
5600 else if (mg->mg_len == HEf_SVKEY)
5601 SvREFCNT_dec((SV*)mg->mg_ptr);
5602 else if (mg->mg_type == PERL_MAGIC_utf8 && mg->mg_ptr)
5603 Safefree(mg->mg_ptr);
5605 if (mg->mg_flags & MGf_REFCOUNTED)
5606 SvREFCNT_dec(mg->mg_obj);
5610 mgp = &mg->mg_moremagic;
5614 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_NOK|SVp_POK)) >> PRIVSHIFT;
5621 =for apidoc sv_rvweaken
5623 Weaken a reference: set the C<SvWEAKREF> flag on this RV; give the
5624 referred-to SV C<PERL_MAGIC_backref> magic if it hasn't already; and
5625 push a back-reference to this RV onto the array of backreferences
5626 associated with that magic.
5632 Perl_sv_rvweaken(pTHX_ SV *sv)
5635 if (!SvOK(sv)) /* let undefs pass */
5638 Perl_croak(aTHX_ "Can't weaken a nonreference");
5639 else if (SvWEAKREF(sv)) {
5640 if (ckWARN(WARN_MISC))
5641 Perl_warner(aTHX_ packWARN(WARN_MISC), "Reference is already weak");
5645 sv_add_backref(tsv, sv);
5651 /* Give tsv backref magic if it hasn't already got it, then push a
5652 * back-reference to sv onto the array associated with the backref magic.
5656 S_sv_add_backref(pTHX_ SV *tsv, SV *sv)
5660 if (SvMAGICAL(tsv) && (mg = mg_find(tsv, PERL_MAGIC_backref)))
5661 av = (AV*)mg->mg_obj;
5664 sv_magic(tsv, (SV*)av, PERL_MAGIC_backref, NULL, 0);
5665 /* av now has a refcnt of 2, which avoids it getting freed
5666 * before us during global cleanup. The extra ref is removed
5667 * by magic_killbackrefs() when tsv is being freed */
5669 if (AvFILLp(av) >= AvMAX(av)) {
5671 SV **svp = AvARRAY(av);
5672 for (i = AvFILLp(av); i >= 0; i--)
5674 svp[i] = sv; /* reuse the slot */
5677 av_extend(av, AvFILLp(av)+1);
5679 AvARRAY(av)[++AvFILLp(av)] = sv; /* av_push() */
5682 /* delete a back-reference to ourselves from the backref magic associated
5683 * with the SV we point to.
5687 S_sv_del_backref(pTHX_ SV *sv)
5694 if (!SvMAGICAL(tsv) || !(mg = mg_find(tsv, PERL_MAGIC_backref)))
5695 Perl_croak(aTHX_ "panic: del_backref");
5696 av = (AV *)mg->mg_obj;
5698 for (i = AvFILLp(av); i >= 0; i--)
5699 if (svp[i] == sv) svp[i] = Nullsv;
5703 =for apidoc sv_insert
5705 Inserts a string at the specified offset/length within the SV. Similar to
5706 the Perl substr() function.
5712 Perl_sv_insert(pTHX_ SV *bigstr, STRLEN offset, STRLEN len, char *little, STRLEN littlelen)
5716 register char *midend;
5717 register char *bigend;
5723 Perl_croak(aTHX_ "Can't modify non-existent substring");
5724 SvPV_force(bigstr, curlen);
5725 (void)SvPOK_only_UTF8(bigstr);
5726 if (offset + len > curlen) {
5727 SvGROW(bigstr, offset+len+1);
5728 Zero(SvPVX(bigstr)+curlen, offset+len-curlen, char);
5729 SvCUR_set(bigstr, offset+len);
5733 i = littlelen - len;
5734 if (i > 0) { /* string might grow */
5735 big = SvGROW(bigstr, SvCUR(bigstr) + i + 1);
5736 mid = big + offset + len;
5737 midend = bigend = big + SvCUR(bigstr);
5740 while (midend > mid) /* shove everything down */
5741 *--bigend = *--midend;
5742 Move(little,big+offset,littlelen,char);
5748 Move(little,SvPVX(bigstr)+offset,len,char);
5753 big = SvPVX(bigstr);
5756 bigend = big + SvCUR(bigstr);
5758 if (midend > bigend)
5759 Perl_croak(aTHX_ "panic: sv_insert");
5761 if (mid - big > bigend - midend) { /* faster to shorten from end */
5763 Move(little, mid, littlelen,char);
5766 i = bigend - midend;
5768 Move(midend, mid, i,char);
5772 SvCUR_set(bigstr, mid - big);
5775 else if ((i = mid - big)) { /* faster from front */
5776 midend -= littlelen;
5778 sv_chop(bigstr,midend-i);
5783 Move(little, mid, littlelen,char);
5785 else if (littlelen) {
5786 midend -= littlelen;
5787 sv_chop(bigstr,midend);
5788 Move(little,midend,littlelen,char);
5791 sv_chop(bigstr,midend);
5797 =for apidoc sv_replace
5799 Make the first argument a copy of the second, then delete the original.
5800 The target SV physically takes over ownership of the body of the source SV
5801 and inherits its flags; however, the target keeps any magic it owns,
5802 and any magic in the source is discarded.
5803 Note that this is a rather specialist SV copying operation; most of the
5804 time you'll want to use C<sv_setsv> or one of its many macro front-ends.
5810 Perl_sv_replace(pTHX_ register SV *sv, register SV *nsv)
5812 U32 refcnt = SvREFCNT(sv);
5813 SV_CHECK_THINKFIRST_COW_DROP(sv);
5814 if (SvREFCNT(nsv) != 1 && ckWARN_d(WARN_INTERNAL))
5815 Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Reference miscount in sv_replace()");
5816 if (SvMAGICAL(sv)) {
5820 sv_upgrade(nsv, SVt_PVMG);
5821 SvMAGIC(nsv) = SvMAGIC(sv);
5822 SvFLAGS(nsv) |= SvMAGICAL(sv);
5828 assert(!SvREFCNT(sv));
5829 StructCopy(nsv,sv,SV);
5830 #ifdef PERL_COPY_ON_WRITE
5831 if (SvIsCOW_normal(nsv)) {
5832 /* We need to follow the pointers around the loop to make the
5833 previous SV point to sv, rather than nsv. */
5836 while ((next = SV_COW_NEXT_SV(current)) != nsv) {
5839 assert(SvPVX(current) == SvPVX(nsv));
5841 /* Make the SV before us point to the SV after us. */
5843 PerlIO_printf(Perl_debug_log, "previous is\n");
5845 PerlIO_printf(Perl_debug_log,
5846 "move it from 0x%"UVxf" to 0x%"UVxf"\n",
5847 (UV) SV_COW_NEXT_SV(current), (UV) sv);
5849 SV_COW_NEXT_SV_SET(current, sv);
5852 SvREFCNT(sv) = refcnt;
5853 SvFLAGS(nsv) |= SVTYPEMASK; /* Mark as freed */
5859 =for apidoc sv_clear
5861 Clear an SV: call any destructors, free up any memory used by the body,
5862 and free the body itself. The SV's head is I<not> freed, although
5863 its type is set to all 1's so that it won't inadvertently be assumed
5864 to be live during global destruction etc.
5865 This function should only be called when REFCNT is zero. Most of the time
5866 you'll want to call C<sv_free()> (or its macro wrapper C<SvREFCNT_dec>)
5873 Perl_sv_clear(pTHX_ register SV *sv)
5877 assert(SvREFCNT(sv) == 0);
5880 if (PL_defstash) { /* Still have a symbol table? */
5887 stash = SvSTASH(sv);
5888 destructor = StashHANDLER(stash,DESTROY);
5890 SV* tmpref = newRV(sv);
5891 SvREADONLY_on(tmpref); /* DESTROY() could be naughty */
5893 PUSHSTACKi(PERLSI_DESTROY);
5898 call_sv((SV*)destructor, G_DISCARD|G_EVAL|G_KEEPERR|G_VOID);
5904 if(SvREFCNT(tmpref) < 2) {
5905 /* tmpref is not kept alive! */
5910 SvREFCNT_dec(tmpref);
5912 } while (SvOBJECT(sv) && SvSTASH(sv) != stash);
5916 if (PL_in_clean_objs)
5917 Perl_croak(aTHX_ "DESTROY created new reference to dead object '%s'",
5919 /* DESTROY gave object new lease on life */
5925 SvREFCNT_dec(SvSTASH(sv)); /* possibly of changed persuasion */
5926 SvOBJECT_off(sv); /* Curse the object. */
5927 if (SvTYPE(sv) != SVt_PVIO)
5928 --PL_sv_objcount; /* XXX Might want something more general */
5931 if (SvTYPE(sv) >= SVt_PVMG) {
5934 if (SvFLAGS(sv) & SVpad_TYPED)
5935 SvREFCNT_dec(SvSTASH(sv));
5938 switch (SvTYPE(sv)) {
5941 IoIFP(sv) != PerlIO_stdin() &&
5942 IoIFP(sv) != PerlIO_stdout() &&
5943 IoIFP(sv) != PerlIO_stderr())
5945 io_close((IO*)sv, FALSE);
5947 if (IoDIRP(sv) && !(IoFLAGS(sv) & IOf_FAKE_DIRP))
5948 PerlDir_close(IoDIRP(sv));
5949 IoDIRP(sv) = (DIR*)NULL;
5950 Safefree(IoTOP_NAME(sv));
5951 Safefree(IoFMT_NAME(sv));
5952 Safefree(IoBOTTOM_NAME(sv));
5967 if (LvTYPE(sv) == 'T') { /* for tie: return HE to pool */
5968 SvREFCNT_dec(HeKEY_sv((HE*)LvTARG(sv)));
5969 HeNEXT((HE*)LvTARG(sv)) = PL_hv_fetch_ent_mh;
5970 PL_hv_fetch_ent_mh = (HE*)LvTARG(sv);
5972 else if (LvTYPE(sv) != 't') /* unless tie: unrefcnted fake SV** */
5973 SvREFCNT_dec(LvTARG(sv));
5977 Safefree(GvNAME(sv));
5978 /* cannot decrease stash refcount yet, as we might recursively delete
5979 ourselves when the refcnt drops to zero. Delay SvREFCNT_dec
5980 of stash until current sv is completely gone.
5981 -- JohnPC, 27 Mar 1998 */
5982 stash = GvSTASH(sv);
5996 SvREFCNT_dec(SvRV(sv));
5998 #ifdef PERL_COPY_ON_WRITE
5999 else if (SvPVX(sv)) {
6001 /* I believe I need to grab the global SV mutex here and
6002 then recheck the COW status. */
6004 PerlIO_printf(Perl_debug_log, "Copy on write: clear\n");
6007 sv_release_COW(sv, SvPVX(sv), SvCUR(sv), SvLEN(sv),
6008 SvUVX(sv), SV_COW_NEXT_SV(sv));
6009 /* And drop it here. */
6011 } else if (SvLEN(sv)) {
6012 Safefree(SvPVX(sv));
6016 else if (SvPVX(sv) && SvLEN(sv))
6017 Safefree(SvPVX(sv));
6018 else if (SvPVX(sv) && SvREADONLY(sv) && SvFAKE(sv)) {
6019 unsharepvn(SvPVX(sv),
6020 SvUTF8(sv) ? -(I32)SvCUR(sv) : SvCUR(sv),
6034 switch (SvTYPE(sv)) {
6050 del_XPVIV(SvANY(sv));
6053 del_XPVNV(SvANY(sv));
6056 del_XPVMG(SvANY(sv));
6059 del_XPVLV(SvANY(sv));
6062 del_XPVAV(SvANY(sv));
6065 del_XPVHV(SvANY(sv));
6068 del_XPVCV(SvANY(sv));
6071 del_XPVGV(SvANY(sv));
6072 /* code duplication for increased performance. */
6073 SvFLAGS(sv) &= SVf_BREAK;
6074 SvFLAGS(sv) |= SVTYPEMASK;
6075 /* decrease refcount of the stash that owns this GV, if any */
6077 SvREFCNT_dec(stash);
6078 return; /* not break, SvFLAGS reset already happened */
6080 del_XPVBM(SvANY(sv));
6083 del_XPVFM(SvANY(sv));
6086 del_XPVIO(SvANY(sv));
6089 SvFLAGS(sv) &= SVf_BREAK;
6090 SvFLAGS(sv) |= SVTYPEMASK;
6094 =for apidoc sv_newref
6096 Increment an SV's reference count. Use the C<SvREFCNT_inc()> wrapper
6103 Perl_sv_newref(pTHX_ SV *sv)
6113 Decrement an SV's reference count, and if it drops to zero, call
6114 C<sv_clear> to invoke destructors and free up any memory used by
6115 the body; finally, deallocate the SV's head itself.
6116 Normally called via a wrapper macro C<SvREFCNT_dec>.
6122 Perl_sv_free(pTHX_ SV *sv)
6126 if (SvREFCNT(sv) == 0) {
6127 if (SvFLAGS(sv) & SVf_BREAK)
6128 /* this SV's refcnt has been artificially decremented to
6129 * trigger cleanup */
6131 if (PL_in_clean_all) /* All is fair */
6133 if (SvREADONLY(sv) && SvIMMORTAL(sv)) {
6134 /* make sure SvREFCNT(sv)==0 happens very seldom */
6135 SvREFCNT(sv) = (~(U32)0)/2;
6138 if (ckWARN_d(WARN_INTERNAL))
6139 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
6140 "Attempt to free unreferenced scalar: SV 0x%"UVxf
6141 pTHX__FORMAT, PTR2UV(sv) pTHX__VALUE);
6144 if (--(SvREFCNT(sv)) > 0)
6146 Perl_sv_free2(aTHX_ sv);
6150 Perl_sv_free2(pTHX_ SV *sv)
6154 if (ckWARN_d(WARN_DEBUGGING))
6155 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
6156 "Attempt to free temp prematurely: SV 0x%"UVxf
6157 pTHX__FORMAT, PTR2UV(sv) pTHX__VALUE);
6161 if (SvREADONLY(sv) && SvIMMORTAL(sv)) {
6162 /* make sure SvREFCNT(sv)==0 happens very seldom */
6163 SvREFCNT(sv) = (~(U32)0)/2;
6174 Returns the length of the string in the SV. Handles magic and type
6175 coercion. See also C<SvCUR>, which gives raw access to the xpv_cur slot.
6181 Perl_sv_len(pTHX_ register SV *sv)
6189 len = mg_length(sv);
6191 (void)SvPV(sv, len);
6196 =for apidoc sv_len_utf8
6198 Returns the number of characters in the string in an SV, counting wide
6199 UTF-8 bytes as a single character. Handles magic and type coercion.
6205 * The length is cached in PERL_UTF8_magic, in the mg_len field. Also the
6206 * mg_ptr is used, by sv_pos_u2b(), see the comments of S_utf8_mg_pos_init().
6207 * (Note that the mg_len is not the length of the mg_ptr field.)
6212 Perl_sv_len_utf8(pTHX_ register SV *sv)
6218 return mg_length(sv);
6222 U8 *s = (U8*)SvPV(sv, len);
6223 MAGIC *mg = SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_utf8) : 0;
6225 if (mg && mg->mg_len != -1 && (mg->mg_len > 0 || len == 0)) {
6227 #ifdef PERL_UTF8_CACHE_ASSERT
6228 assert(ulen == Perl_utf8_length(aTHX_ s, s + len));
6232 ulen = Perl_utf8_length(aTHX_ s, s + len);
6233 if (!mg && !SvREADONLY(sv)) {
6234 sv_magic(sv, 0, PERL_MAGIC_utf8, 0, 0);
6235 mg = mg_find(sv, PERL_MAGIC_utf8);
6245 /* S_utf8_mg_pos_init() is used to initialize the mg_ptr field of
6246 * a PERL_UTF8_magic. The mg_ptr is used to store the mapping
6247 * between UTF-8 and byte offsets. There are two (substr offset and substr
6248 * length, the i offset, PERL_MAGIC_UTF8_CACHESIZE) times two (UTF-8 offset
6249 * and byte offset) cache positions.
6251 * The mg_len field is used by sv_len_utf8(), see its comments.
6252 * Note that the mg_len is not the length of the mg_ptr field.
6256 S_utf8_mg_pos_init(pTHX_ SV *sv, MAGIC **mgp, STRLEN **cachep, I32 i, I32 *offsetp, U8 *s, U8 *start)
6260 if (SvMAGICAL(sv) && !SvREADONLY(sv)) {
6262 *mgp = sv_magicext(sv, 0, PERL_MAGIC_utf8, &PL_vtbl_utf8, 0, 0);
6266 *cachep = (STRLEN *) (*mgp)->mg_ptr;
6268 Newz(0, *cachep, PERL_MAGIC_UTF8_CACHESIZE * 2, STRLEN);
6269 (*mgp)->mg_ptr = (char *) *cachep;
6273 (*cachep)[i] = *offsetp;
6274 (*cachep)[i+1] = s - start;
6282 * S_utf8_mg_pos() is used to query and update mg_ptr field of
6283 * a PERL_UTF8_magic. The mg_ptr is used to store the mapping
6284 * between UTF-8 and byte offsets. See also the comments of
6285 * S_utf8_mg_pos_init().
6289 S_utf8_mg_pos(pTHX_ SV *sv, MAGIC **mgp, STRLEN **cachep, I32 i, I32 *offsetp, I32 uoff, U8 **sp, U8 *start, U8 *send)
6293 if (SvMAGICAL(sv) && !SvREADONLY(sv)) {
6295 *mgp = mg_find(sv, PERL_MAGIC_utf8);
6296 if (*mgp && (*mgp)->mg_ptr) {
6297 *cachep = (STRLEN *) (*mgp)->mg_ptr;
6298 ASSERT_UTF8_CACHE(*cachep);
6299 if ((*cachep)[i] == (STRLEN)uoff) /* An exact match. */
6301 else { /* We will skip to the right spot. */
6306 /* The assumption is that going backward is half
6307 * the speed of going forward (that's where the
6308 * 2 * backw in the below comes from). (The real
6309 * figure of course depends on the UTF-8 data.) */
6311 if ((*cachep)[i] > (STRLEN)uoff) {
6313 backw = (*cachep)[i] - (STRLEN)uoff;
6315 if (forw < 2 * backw)
6318 p = start + (*cachep)[i+1];
6320 /* Try this only for the substr offset (i == 0),
6321 * not for the substr length (i == 2). */
6322 else if (i == 0) { /* (*cachep)[i] < uoff */
6323 STRLEN ulen = sv_len_utf8(sv);
6325 if ((STRLEN)uoff < ulen) {
6326 forw = (STRLEN)uoff - (*cachep)[i];
6327 backw = ulen - (STRLEN)uoff;
6329 if (forw < 2 * backw)
6330 p = start + (*cachep)[i+1];
6335 /* If the string is not long enough for uoff,
6336 * we could extend it, but not at this low a level. */
6340 if (forw < 2 * backw) {
6347 while (UTF8_IS_CONTINUATION(*p))
6352 /* Update the cache. */
6353 (*cachep)[i] = (STRLEN)uoff;
6354 (*cachep)[i+1] = p - start;
6356 /* Drop the stale "length" cache */
6365 if (found) { /* Setup the return values. */
6366 *offsetp = (*cachep)[i+1];
6367 *sp = start + *offsetp;
6370 *offsetp = send - start;
6372 else if (*sp < start) {
6378 #ifdef PERL_UTF8_CACHE_ASSERT
6383 while (n-- && s < send)
6387 assert(*offsetp == s - start);
6388 assert((*cachep)[0] == (STRLEN)uoff);
6389 assert((*cachep)[1] == *offsetp);
6391 ASSERT_UTF8_CACHE(*cachep);
6400 =for apidoc sv_pos_u2b
6402 Converts the value pointed to by offsetp from a count of UTF-8 chars from
6403 the start of the string, to a count of the equivalent number of bytes; if
6404 lenp is non-zero, it does the same to lenp, but this time starting from
6405 the offset, rather than from the start of the string. Handles magic and
6412 * sv_pos_u2b() uses, like sv_pos_b2u(), the mg_ptr of the potential
6413 * PERL_UTF8_magic of the sv to store the mapping between UTF-8 and
6414 * byte offsets. See also the comments of S_utf8_mg_pos().
6419 Perl_sv_pos_u2b(pTHX_ register SV *sv, I32* offsetp, I32* lenp)
6430 start = s = (U8*)SvPV(sv, len);
6432 I32 uoffset = *offsetp;
6437 if (utf8_mg_pos(sv, &mg, &cache, 0, offsetp, *offsetp, &s, start, send))
6439 if (!found && uoffset > 0) {
6440 while (s < send && uoffset--)
6444 if (utf8_mg_pos_init(sv, &mg, &cache, 0, offsetp, s, start))
6446 *offsetp = s - start;
6451 if (utf8_mg_pos(sv, &mg, &cache, 2, lenp, *lenp + *offsetp, &s, start, send)) {
6455 if (!found && *lenp > 0) {
6458 while (s < send && ulen--)
6462 utf8_mg_pos_init(sv, &mg, &cache, 2, lenp, s, start);
6466 ASSERT_UTF8_CACHE(cache);
6478 =for apidoc sv_pos_b2u
6480 Converts the value pointed to by offsetp from a count of bytes from the
6481 start of the string, to a count of the equivalent number of UTF-8 chars.
6482 Handles magic and type coercion.
6488 * sv_pos_b2u() uses, like sv_pos_u2b(), the mg_ptr of the potential
6489 * PERL_UTF8_magic of the sv to store the mapping between UTF-8 and
6490 * byte offsets. See also the comments of S_utf8_mg_pos().
6495 Perl_sv_pos_b2u(pTHX_ register SV* sv, I32* offsetp)
6503 s = (U8*)SvPV(sv, len);
6504 if ((I32)len < *offsetp)
6505 Perl_croak(aTHX_ "panic: sv_pos_b2u: bad byte offset");
6507 U8* send = s + *offsetp;
6509 STRLEN *cache = NULL;
6513 if (SvMAGICAL(sv) && !SvREADONLY(sv)) {
6514 mg = mg_find(sv, PERL_MAGIC_utf8);
6515 if (mg && mg->mg_ptr) {
6516 cache = (STRLEN *) mg->mg_ptr;
6517 if (cache[1] == (STRLEN)*offsetp) {
6518 /* An exact match. */
6519 *offsetp = cache[0];
6523 else if (cache[1] < (STRLEN)*offsetp) {
6524 /* We already know part of the way. */
6527 /* Let the below loop do the rest. */
6529 else { /* cache[1] > *offsetp */
6530 /* We already know all of the way, now we may
6531 * be able to walk back. The same assumption
6532 * is made as in S_utf8_mg_pos(), namely that
6533 * walking backward is twice slower than
6534 * walking forward. */
6535 STRLEN forw = *offsetp;
6536 STRLEN backw = cache[1] - *offsetp;
6538 if (!(forw < 2 * backw)) {
6539 U8 *p = s + cache[1];
6546 while (UTF8_IS_CONTINUATION(*p)) {
6554 *offsetp = cache[0];
6556 /* Drop the stale "length" cache */
6564 ASSERT_UTF8_CACHE(cache);
6570 /* Call utf8n_to_uvchr() to validate the sequence
6571 * (unless a simple non-UTF character) */
6572 if (!UTF8_IS_INVARIANT(*s))
6573 utf8n_to_uvchr(s, UTF8SKIP(s), &n, 0);
6582 if (!SvREADONLY(sv)) {
6584 sv_magic(sv, 0, PERL_MAGIC_utf8, 0, 0);
6585 mg = mg_find(sv, PERL_MAGIC_utf8);
6590 Newz(0, cache, PERL_MAGIC_UTF8_CACHESIZE * 2, STRLEN);
6591 mg->mg_ptr = (char *) cache;
6596 cache[1] = *offsetp;
6597 /* Drop the stale "length" cache */
6610 Returns a boolean indicating whether the strings in the two SVs are
6611 identical. Is UTF-8 and 'use bytes' aware, handles get magic, and will
6612 coerce its args to strings if necessary.
6618 Perl_sv_eq(pTHX_ register SV *sv1, register SV *sv2)
6626 SV* svrecode = Nullsv;
6633 pv1 = SvPV(sv1, cur1);
6640 pv2 = SvPV(sv2, cur2);
6642 if (cur1 && cur2 && SvUTF8(sv1) != SvUTF8(sv2) && !IN_BYTES) {
6643 /* Differing utf8ness.
6644 * Do not UTF8size the comparands as a side-effect. */
6647 svrecode = newSVpvn(pv2, cur2);
6648 sv_recode_to_utf8(svrecode, PL_encoding);
6649 pv2 = SvPV(svrecode, cur2);
6652 svrecode = newSVpvn(pv1, cur1);
6653 sv_recode_to_utf8(svrecode, PL_encoding);
6654 pv1 = SvPV(svrecode, cur1);
6656 /* Now both are in UTF-8. */
6658 SvREFCNT_dec(svrecode);
6663 bool is_utf8 = TRUE;
6666 /* sv1 is the UTF-8 one,
6667 * if is equal it must be downgrade-able */
6668 char *pv = (char*)bytes_from_utf8((U8*)pv1,
6674 /* sv2 is the UTF-8 one,
6675 * if is equal it must be downgrade-able */
6676 char *pv = (char *)bytes_from_utf8((U8*)pv2,
6682 /* Downgrade not possible - cannot be eq */
6690 eq = (pv1 == pv2) || memEQ(pv1, pv2, cur1);
6693 SvREFCNT_dec(svrecode);
6704 Compares the strings in two SVs. Returns -1, 0, or 1 indicating whether the
6705 string in C<sv1> is less than, equal to, or greater than the string in
6706 C<sv2>. Is UTF-8 and 'use bytes' aware, handles get magic, and will
6707 coerce its args to strings if necessary. See also C<sv_cmp_locale>.
6713 Perl_sv_cmp(pTHX_ register SV *sv1, register SV *sv2)
6716 char *pv1, *pv2, *tpv = Nullch;
6718 SV *svrecode = Nullsv;
6725 pv1 = SvPV(sv1, cur1);
6732 pv2 = SvPV(sv2, cur2);
6734 if (cur1 && cur2 && SvUTF8(sv1) != SvUTF8(sv2) && !IN_BYTES) {
6735 /* Differing utf8ness.
6736 * Do not UTF8size the comparands as a side-effect. */
6739 svrecode = newSVpvn(pv2, cur2);
6740 sv_recode_to_utf8(svrecode, PL_encoding);
6741 pv2 = SvPV(svrecode, cur2);
6744 pv2 = tpv = (char*)bytes_to_utf8((U8*)pv2, &cur2);
6749 svrecode = newSVpvn(pv1, cur1);
6750 sv_recode_to_utf8(svrecode, PL_encoding);
6751 pv1 = SvPV(svrecode, cur1);
6754 pv1 = tpv = (char*)bytes_to_utf8((U8*)pv1, &cur1);
6760 cmp = cur2 ? -1 : 0;
6764 I32 retval = memcmp((void*)pv1, (void*)pv2, cur1 < cur2 ? cur1 : cur2);
6767 cmp = retval < 0 ? -1 : 1;
6768 } else if (cur1 == cur2) {
6771 cmp = cur1 < cur2 ? -1 : 1;
6776 SvREFCNT_dec(svrecode);
6785 =for apidoc sv_cmp_locale
6787 Compares the strings in two SVs in a locale-aware manner. Is UTF-8 and
6788 'use bytes' aware, handles get magic, and will coerce its args to strings
6789 if necessary. See also C<sv_cmp_locale>. See also C<sv_cmp>.
6795 Perl_sv_cmp_locale(pTHX_ register SV *sv1, register SV *sv2)
6797 #ifdef USE_LOCALE_COLLATE
6803 if (PL_collation_standard)
6807 pv1 = sv1 ? sv_collxfrm(sv1, &len1) : (char *) NULL;
6809 pv2 = sv2 ? sv_collxfrm(sv2, &len2) : (char *) NULL;
6811 if (!pv1 || !len1) {
6822 retval = memcmp((void*)pv1, (void*)pv2, len1 < len2 ? len1 : len2);
6825 return retval < 0 ? -1 : 1;
6828 * When the result of collation is equality, that doesn't mean
6829 * that there are no differences -- some locales exclude some
6830 * characters from consideration. So to avoid false equalities,
6831 * we use the raw string as a tiebreaker.
6837 #endif /* USE_LOCALE_COLLATE */
6839 return sv_cmp(sv1, sv2);
6843 #ifdef USE_LOCALE_COLLATE
6846 =for apidoc sv_collxfrm
6848 Add Collate Transform magic to an SV if it doesn't already have it.
6850 Any scalar variable may carry PERL_MAGIC_collxfrm magic that contains the
6851 scalar data of the variable, but transformed to such a format that a normal
6852 memory comparison can be used to compare the data according to the locale
6859 Perl_sv_collxfrm(pTHX_ SV *sv, STRLEN *nxp)
6863 mg = SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_collxfrm) : (MAGIC *) NULL;
6864 if (!mg || !mg->mg_ptr || *(U32*)mg->mg_ptr != PL_collation_ix) {
6869 Safefree(mg->mg_ptr);
6871 if ((xf = mem_collxfrm(s, len, &xlen))) {
6872 if (SvREADONLY(sv)) {
6875 return xf + sizeof(PL_collation_ix);
6878 sv_magic(sv, 0, PERL_MAGIC_collxfrm, 0, 0);
6879 mg = mg_find(sv, PERL_MAGIC_collxfrm);
6892 if (mg && mg->mg_ptr) {
6894 return mg->mg_ptr + sizeof(PL_collation_ix);
6902 #endif /* USE_LOCALE_COLLATE */
6907 Get a line from the filehandle and store it into the SV, optionally
6908 appending to the currently-stored string.
6914 Perl_sv_gets(pTHX_ register SV *sv, register PerlIO *fp, I32 append)
6918 register STDCHAR rslast;
6919 register STDCHAR *bp;
6925 if (SvTHINKFIRST(sv))
6926 sv_force_normal_flags(sv, append ? 0 : SV_COW_DROP_PV);
6927 /* XXX. If you make this PVIV, then copy on write can copy scalars read
6929 However, perlbench says it's slower, because the existing swipe code
6930 is faster than copy on write.
6931 Swings and roundabouts. */
6932 (void)SvUPGRADE(sv, SVt_PV);
6937 if (PerlIO_isutf8(fp)) {
6939 sv_utf8_upgrade_nomg(sv);
6940 sv_pos_u2b(sv,&append,0);
6942 } else if (SvUTF8(sv)) {
6943 SV *tsv = NEWSV(0,0);
6944 sv_gets(tsv, fp, 0);
6945 sv_utf8_upgrade_nomg(tsv);
6946 SvCUR_set(sv,append);
6949 goto return_string_or_null;
6954 if (PerlIO_isutf8(fp))
6957 if (IN_PERL_COMPILETIME) {
6958 /* we always read code in line mode */
6962 else if (RsSNARF(PL_rs)) {
6963 /* If it is a regular disk file use size from stat() as estimate
6964 of amount we are going to read - may result in malloc-ing
6965 more memory than we realy need if layers bellow reduce
6966 size we read (e.g. CRLF or a gzip layer)
6969 if (!PerlLIO_fstat(PerlIO_fileno(fp), &st) && S_ISREG(st.st_mode)) {
6970 Off_t offset = PerlIO_tell(fp);
6971 if (offset != (Off_t) -1 && st.st_size + append > offset) {
6972 (void) SvGROW(sv, (STRLEN)((st.st_size - offset) + append + 1));
6978 else if (RsRECORD(PL_rs)) {
6982 /* Grab the size of the record we're getting */
6983 recsize = SvIV(SvRV(PL_rs));
6984 buffer = SvGROW(sv, (STRLEN)(recsize + append + 1)) + append;
6987 /* VMS wants read instead of fread, because fread doesn't respect */
6988 /* RMS record boundaries. This is not necessarily a good thing to be */
6989 /* doing, but we've got no other real choice - except avoid stdio
6990 as implementation - perhaps write a :vms layer ?
6992 bytesread = PerlLIO_read(PerlIO_fileno(fp), buffer, recsize);
6994 bytesread = PerlIO_read(fp, buffer, recsize);
6998 SvCUR_set(sv, bytesread += append);
6999 buffer[bytesread] = '\0';
7000 goto return_string_or_null;
7002 else if (RsPARA(PL_rs)) {
7008 /* Get $/ i.e. PL_rs into same encoding as stream wants */
7009 if (PerlIO_isutf8(fp)) {
7010 rsptr = SvPVutf8(PL_rs, rslen);
7013 if (SvUTF8(PL_rs)) {
7014 if (!sv_utf8_downgrade(PL_rs, TRUE)) {
7015 Perl_croak(aTHX_ "Wide character in $/");
7018 rsptr = SvPV(PL_rs, rslen);
7022 rslast = rslen ? rsptr[rslen - 1] : '\0';
7024 if (rspara) { /* have to do this both before and after */
7025 do { /* to make sure file boundaries work right */
7028 i = PerlIO_getc(fp);
7032 PerlIO_ungetc(fp,i);
7038 /* See if we know enough about I/O mechanism to cheat it ! */
7040 /* This used to be #ifdef test - it is made run-time test for ease
7041 of abstracting out stdio interface. One call should be cheap
7042 enough here - and may even be a macro allowing compile
7046 if (PerlIO_fast_gets(fp)) {
7049 * We're going to steal some values from the stdio struct
7050 * and put EVERYTHING in the innermost loop into registers.
7052 register STDCHAR *ptr;
7056 #if defined(VMS) && defined(PERLIO_IS_STDIO)
7057 /* An ungetc()d char is handled separately from the regular
7058 * buffer, so we getc() it back out and stuff it in the buffer.
7060 i = PerlIO_getc(fp);
7061 if (i == EOF) return 0;
7062 *(--((*fp)->_ptr)) = (unsigned char) i;
7066 /* Here is some breathtakingly efficient cheating */
7068 cnt = PerlIO_get_cnt(fp); /* get count into register */
7069 /* make sure we have the room */
7070 if ((I32)(SvLEN(sv) - append) <= cnt + 1) {
7071 /* Not room for all of it
7072 if we are looking for a separator and room for some
7074 if (rslen && cnt > 80 && (I32)SvLEN(sv) > append) {
7075 /* just process what we have room for */
7076 shortbuffered = cnt - SvLEN(sv) + append + 1;
7077 cnt -= shortbuffered;
7081 /* remember that cnt can be negative */
7082 SvGROW(sv, (STRLEN)(append + (cnt <= 0 ? 2 : (cnt + 1))));
7087 bp = (STDCHAR*)SvPVX(sv) + append; /* move these two too to registers */
7088 ptr = (STDCHAR*)PerlIO_get_ptr(fp);
7089 DEBUG_P(PerlIO_printf(Perl_debug_log,
7090 "Screamer: entering, ptr=%"UVuf", cnt=%ld\n",PTR2UV(ptr),(long)cnt));
7091 DEBUG_P(PerlIO_printf(Perl_debug_log,
7092 "Screamer: entering: PerlIO * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
7093 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
7094 PTR2UV(PerlIO_has_base(fp) ? PerlIO_get_base(fp) : 0)));
7099 while (cnt > 0) { /* this | eat */
7101 if ((*bp++ = *ptr++) == rslast) /* really | dust */
7102 goto thats_all_folks; /* screams | sed :-) */
7106 Copy(ptr, bp, cnt, char); /* this | eat */
7107 bp += cnt; /* screams | dust */
7108 ptr += cnt; /* louder | sed :-) */
7113 if (shortbuffered) { /* oh well, must extend */
7114 cnt = shortbuffered;
7116 bpx = bp - (STDCHAR*)SvPVX(sv); /* box up before relocation */
7118 SvGROW(sv, SvLEN(sv) + append + cnt + 2);
7119 bp = (STDCHAR*)SvPVX(sv) + bpx; /* unbox after relocation */
7123 DEBUG_P(PerlIO_printf(Perl_debug_log,
7124 "Screamer: going to getc, ptr=%"UVuf", cnt=%ld\n",
7125 PTR2UV(ptr),(long)cnt));
7126 PerlIO_set_ptrcnt(fp, (STDCHAR*)ptr, cnt); /* deregisterize cnt and ptr */
7128 DEBUG_P(PerlIO_printf(Perl_debug_log,
7129 "Screamer: pre: FILE * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
7130 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
7131 PTR2UV(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0)));
7133 /* This used to call 'filbuf' in stdio form, but as that behaves like
7134 getc when cnt <= 0 we use PerlIO_getc here to avoid introducing
7135 another abstraction. */
7136 i = PerlIO_getc(fp); /* get more characters */
7138 DEBUG_P(PerlIO_printf(Perl_debug_log,
7139 "Screamer: post: FILE * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
7140 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
7141 PTR2UV(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0)));
7143 cnt = PerlIO_get_cnt(fp);
7144 ptr = (STDCHAR*)PerlIO_get_ptr(fp); /* reregisterize cnt and ptr */
7145 DEBUG_P(PerlIO_printf(Perl_debug_log,
7146 "Screamer: after getc, ptr=%"UVuf", cnt=%ld\n",PTR2UV(ptr),(long)cnt));
7148 if (i == EOF) /* all done for ever? */
7149 goto thats_really_all_folks;
7151 bpx = bp - (STDCHAR*)SvPVX(sv); /* box up before relocation */
7153 SvGROW(sv, bpx + cnt + 2);
7154 bp = (STDCHAR*)SvPVX(sv) + bpx; /* unbox after relocation */
7156 *bp++ = (STDCHAR)i; /* store character from PerlIO_getc */
7158 if (rslen && (STDCHAR)i == rslast) /* all done for now? */
7159 goto thats_all_folks;
7163 if ((rslen > 1 && (STRLEN)(bp - (STDCHAR*)SvPVX(sv)) < rslen) ||
7164 memNE((char*)bp - rslen, rsptr, rslen))
7165 goto screamer; /* go back to the fray */
7166 thats_really_all_folks:
7168 cnt += shortbuffered;
7169 DEBUG_P(PerlIO_printf(Perl_debug_log,
7170 "Screamer: quitting, ptr=%"UVuf", cnt=%ld\n",PTR2UV(ptr),(long)cnt));
7171 PerlIO_set_ptrcnt(fp, (STDCHAR*)ptr, cnt); /* put these back or we're in trouble */
7172 DEBUG_P(PerlIO_printf(Perl_debug_log,
7173 "Screamer: end: FILE * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
7174 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
7175 PTR2UV(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0)));
7177 SvCUR_set(sv, bp - (STDCHAR*)SvPVX(sv)); /* set length */
7178 DEBUG_P(PerlIO_printf(Perl_debug_log,
7179 "Screamer: done, len=%ld, string=|%.*s|\n",
7180 (long)SvCUR(sv),(int)SvCUR(sv),SvPVX(sv)));
7184 /*The big, slow, and stupid way. */
7186 /* Any stack-challenged places. */
7188 /* EPOC: need to work around SDK features. *
7189 * On WINS: MS VC5 generates calls to _chkstk, *
7190 * if a "large" stack frame is allocated. *
7191 * gcc on MARM does not generate calls like these. */
7192 # define USEHEAPINSTEADOFSTACK
7195 #ifdef USEHEAPINSTEADOFSTACK
7197 New(0, buf, 8192, STDCHAR);
7205 register STDCHAR *bpe = buf + sizeof(buf);
7207 while ((i = PerlIO_getc(fp)) != EOF && (*bp++ = (STDCHAR)i) != rslast && bp < bpe)
7208 ; /* keep reading */
7212 cnt = PerlIO_read(fp,(char*)buf, sizeof(buf));
7213 /* Accomodate broken VAXC compiler, which applies U8 cast to
7214 * both args of ?: operator, causing EOF to change into 255
7217 i = (U8)buf[cnt - 1];
7223 cnt = 0; /* we do need to re-set the sv even when cnt <= 0 */
7225 sv_catpvn(sv, (char *) buf, cnt);
7227 sv_setpvn(sv, (char *) buf, cnt);
7229 if (i != EOF && /* joy */
7231 SvCUR(sv) < rslen ||
7232 memNE(SvPVX(sv) + SvCUR(sv) - rslen, rsptr, rslen)))
7236 * If we're reading from a TTY and we get a short read,
7237 * indicating that the user hit his EOF character, we need
7238 * to notice it now, because if we try to read from the TTY
7239 * again, the EOF condition will disappear.
7241 * The comparison of cnt to sizeof(buf) is an optimization
7242 * that prevents unnecessary calls to feof().
7246 if (!(cnt < sizeof(buf) && PerlIO_eof(fp)))
7250 #ifdef USEHEAPINSTEADOFSTACK
7255 if (rspara) { /* have to do this both before and after */
7256 while (i != EOF) { /* to make sure file boundaries work right */
7257 i = PerlIO_getc(fp);
7259 PerlIO_ungetc(fp,i);
7265 return_string_or_null:
7266 return (SvCUR(sv) - append) ? SvPVX(sv) : Nullch;
7272 Auto-increment of the value in the SV, doing string to numeric conversion
7273 if necessary. Handles 'get' magic.
7279 Perl_sv_inc(pTHX_ register SV *sv)
7288 if (SvTHINKFIRST(sv)) {
7290 sv_force_normal_flags(sv, 0);
7291 if (SvREADONLY(sv)) {
7292 if (IN_PERL_RUNTIME)
7293 Perl_croak(aTHX_ PL_no_modify);
7297 if (SvAMAGIC(sv) && AMG_CALLun(sv,inc))
7299 i = PTR2IV(SvRV(sv));
7304 flags = SvFLAGS(sv);
7305 if ((flags & (SVp_NOK|SVp_IOK)) == SVp_NOK) {
7306 /* It's (privately or publicly) a float, but not tested as an
7307 integer, so test it to see. */
7309 flags = SvFLAGS(sv);
7311 if ((flags & SVf_IOK) || ((flags & (SVp_IOK | SVp_NOK)) == SVp_IOK)) {
7312 /* It's publicly an integer, or privately an integer-not-float */
7313 #ifdef PERL_PRESERVE_IVUV
7317 if (SvUVX(sv) == UV_MAX)
7318 sv_setnv(sv, UV_MAX_P1);
7320 (void)SvIOK_only_UV(sv);
7323 if (SvIVX(sv) == IV_MAX)
7324 sv_setuv(sv, (UV)IV_MAX + 1);
7326 (void)SvIOK_only(sv);
7332 if (flags & SVp_NOK) {
7333 (void)SvNOK_only(sv);
7338 if (!(flags & SVp_POK) || !*SvPVX(sv)) {
7339 if ((flags & SVTYPEMASK) < SVt_PVIV)
7340 sv_upgrade(sv, SVt_IV);
7341 (void)SvIOK_only(sv);
7346 while (isALPHA(*d)) d++;
7347 while (isDIGIT(*d)) d++;
7349 #ifdef PERL_PRESERVE_IVUV
7350 /* Got to punt this as an integer if needs be, but we don't issue
7351 warnings. Probably ought to make the sv_iv_please() that does
7352 the conversion if possible, and silently. */
7353 int numtype = grok_number(SvPVX(sv), SvCUR(sv), NULL);
7354 if (numtype && !(numtype & IS_NUMBER_INFINITY)) {
7355 /* Need to try really hard to see if it's an integer.
7356 9.22337203685478e+18 is an integer.
7357 but "9.22337203685478e+18" + 0 is UV=9223372036854779904
7358 so $a="9.22337203685478e+18"; $a+0; $a++
7359 needs to be the same as $a="9.22337203685478e+18"; $a++
7366 /* sv_2iv *should* have made this an NV */
7367 if (flags & SVp_NOK) {
7368 (void)SvNOK_only(sv);
7372 /* I don't think we can get here. Maybe I should assert this
7373 And if we do get here I suspect that sv_setnv will croak. NWC
7375 #if defined(USE_LONG_DOUBLE)
7376 DEBUG_c(PerlIO_printf(Perl_debug_log,"sv_inc punt failed to convert '%s' to IOK or NOKp, UV=0x%"UVxf" NV=%"PERL_PRIgldbl"\n",
7377 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
7379 DEBUG_c(PerlIO_printf(Perl_debug_log,"sv_inc punt failed to convert '%s' to IOK or NOKp, UV=0x%"UVxf" NV=%"NVgf"\n",
7380 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
7383 #endif /* PERL_PRESERVE_IVUV */
7384 sv_setnv(sv,Atof(SvPVX(sv)) + 1.0);
7388 while (d >= SvPVX(sv)) {
7396 /* MKS: The original code here died if letters weren't consecutive.
7397 * at least it didn't have to worry about non-C locales. The
7398 * new code assumes that ('z'-'a')==('Z'-'A'), letters are
7399 * arranged in order (although not consecutively) and that only
7400 * [A-Za-z] are accepted by isALPHA in the C locale.
7402 if (*d != 'z' && *d != 'Z') {
7403 do { ++*d; } while (!isALPHA(*d));
7406 *(d--) -= 'z' - 'a';
7411 *(d--) -= 'z' - 'a' + 1;
7415 /* oh,oh, the number grew */
7416 SvGROW(sv, SvCUR(sv) + 2);
7418 for (d = SvPVX(sv) + SvCUR(sv); d > SvPVX(sv); d--)
7429 Auto-decrement of the value in the SV, doing string to numeric conversion
7430 if necessary. Handles 'get' magic.
7436 Perl_sv_dec(pTHX_ register SV *sv)
7444 if (SvTHINKFIRST(sv)) {
7446 sv_force_normal_flags(sv, 0);
7447 if (SvREADONLY(sv)) {
7448 if (IN_PERL_RUNTIME)
7449 Perl_croak(aTHX_ PL_no_modify);
7453 if (SvAMAGIC(sv) && AMG_CALLun(sv,dec))
7455 i = PTR2IV(SvRV(sv));
7460 /* Unlike sv_inc we don't have to worry about string-never-numbers
7461 and keeping them magic. But we mustn't warn on punting */
7462 flags = SvFLAGS(sv);
7463 if ((flags & SVf_IOK) || ((flags & (SVp_IOK | SVp_NOK)) == SVp_IOK)) {
7464 /* It's publicly an integer, or privately an integer-not-float */
7465 #ifdef PERL_PRESERVE_IVUV
7469 if (SvUVX(sv) == 0) {
7470 (void)SvIOK_only(sv);
7474 (void)SvIOK_only_UV(sv);
7478 if (SvIVX(sv) == IV_MIN)
7479 sv_setnv(sv, (NV)IV_MIN - 1.0);
7481 (void)SvIOK_only(sv);
7487 if (flags & SVp_NOK) {
7489 (void)SvNOK_only(sv);
7492 if (!(flags & SVp_POK)) {
7493 if ((flags & SVTYPEMASK) < SVt_PVNV)
7494 sv_upgrade(sv, SVt_NV);
7496 (void)SvNOK_only(sv);
7499 #ifdef PERL_PRESERVE_IVUV
7501 int numtype = grok_number(SvPVX(sv), SvCUR(sv), NULL);
7502 if (numtype && !(numtype & IS_NUMBER_INFINITY)) {
7503 /* Need to try really hard to see if it's an integer.
7504 9.22337203685478e+18 is an integer.
7505 but "9.22337203685478e+18" + 0 is UV=9223372036854779904
7506 so $a="9.22337203685478e+18"; $a+0; $a--
7507 needs to be the same as $a="9.22337203685478e+18"; $a--
7514 /* sv_2iv *should* have made this an NV */
7515 if (flags & SVp_NOK) {
7516 (void)SvNOK_only(sv);
7520 /* I don't think we can get here. Maybe I should assert this
7521 And if we do get here I suspect that sv_setnv will croak. NWC
7523 #if defined(USE_LONG_DOUBLE)
7524 DEBUG_c(PerlIO_printf(Perl_debug_log,"sv_dec punt failed to convert '%s' to IOK or NOKp, UV=0x%"UVxf" NV=%"PERL_PRIgldbl"\n",
7525 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
7527 DEBUG_c(PerlIO_printf(Perl_debug_log,"sv_dec punt failed to convert '%s' to IOK or NOKp, UV=0x%"UVxf" NV=%"NVgf"\n",
7528 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
7532 #endif /* PERL_PRESERVE_IVUV */
7533 sv_setnv(sv,Atof(SvPVX(sv)) - 1.0); /* punt */
7537 =for apidoc sv_mortalcopy
7539 Creates a new SV which is a copy of the original SV (using C<sv_setsv>).
7540 The new SV is marked as mortal. It will be destroyed "soon", either by an
7541 explicit call to FREETMPS, or by an implicit call at places such as
7542 statement boundaries. See also C<sv_newmortal> and C<sv_2mortal>.
7547 /* Make a string that will exist for the duration of the expression
7548 * evaluation. Actually, it may have to last longer than that, but
7549 * hopefully we won't free it until it has been assigned to a
7550 * permanent location. */
7553 Perl_sv_mortalcopy(pTHX_ SV *oldstr)
7558 sv_setsv(sv,oldstr);
7560 PL_tmps_stack[++PL_tmps_ix] = sv;
7566 =for apidoc sv_newmortal
7568 Creates a new null SV which is mortal. The reference count of the SV is
7569 set to 1. It will be destroyed "soon", either by an explicit call to
7570 FREETMPS, or by an implicit call at places such as statement boundaries.
7571 See also C<sv_mortalcopy> and C<sv_2mortal>.
7577 Perl_sv_newmortal(pTHX)
7582 SvFLAGS(sv) = SVs_TEMP;
7584 PL_tmps_stack[++PL_tmps_ix] = sv;
7589 =for apidoc sv_2mortal
7591 Marks an existing SV as mortal. The SV will be destroyed "soon", either
7592 by an explicit call to FREETMPS, or by an implicit call at places such as
7593 statement boundaries. SvTEMP() is turned on which means that the SV's
7594 string buffer can be "stolen" if this SV is copied. See also C<sv_newmortal>
7595 and C<sv_mortalcopy>.
7601 Perl_sv_2mortal(pTHX_ register SV *sv)
7605 if (SvREADONLY(sv) && SvIMMORTAL(sv))
7608 PL_tmps_stack[++PL_tmps_ix] = sv;
7616 Creates a new SV and copies a string into it. The reference count for the
7617 SV is set to 1. If C<len> is zero, Perl will compute the length using
7618 strlen(). For efficiency, consider using C<newSVpvn> instead.
7624 Perl_newSVpv(pTHX_ const char *s, STRLEN len)
7631 sv_setpvn(sv,s,len);
7636 =for apidoc newSVpvn
7638 Creates a new SV and copies a string into it. The reference count for the
7639 SV is set to 1. Note that if C<len> is zero, Perl will create a zero length
7640 string. You are responsible for ensuring that the source string is at least
7641 C<len> bytes long. If the C<s> argument is NULL the new SV will be undefined.
7647 Perl_newSVpvn(pTHX_ const char *s, STRLEN len)
7652 sv_setpvn(sv,s,len);
7657 =for apidoc newSVpvn_share
7659 Creates a new SV with its SvPVX pointing to a shared string in the string
7660 table. If the string does not already exist in the table, it is created
7661 first. Turns on READONLY and FAKE. The string's hash is stored in the UV
7662 slot of the SV; if the C<hash> parameter is non-zero, that value is used;
7663 otherwise the hash is computed. The idea here is that as the string table
7664 is used for shared hash keys these strings will have SvPVX == HeKEY and
7665 hash lookup will avoid string compare.
7671 Perl_newSVpvn_share(pTHX_ const char *src, I32 len, U32 hash)
7674 bool is_utf8 = FALSE;
7676 STRLEN tmplen = -len;
7678 /* See the note in hv.c:hv_fetch() --jhi */
7679 src = (char*)bytes_from_utf8((U8*)src, &tmplen, &is_utf8);
7683 PERL_HASH(hash, src, len);
7685 sv_upgrade(sv, SVt_PVIV);
7686 SvPVX(sv) = sharepvn(src, is_utf8?-len:len, hash);
7699 #if defined(PERL_IMPLICIT_CONTEXT)
7701 /* pTHX_ magic can't cope with varargs, so this is a no-context
7702 * version of the main function, (which may itself be aliased to us).
7703 * Don't access this version directly.
7707 Perl_newSVpvf_nocontext(const char* pat, ...)
7712 va_start(args, pat);
7713 sv = vnewSVpvf(pat, &args);
7720 =for apidoc newSVpvf
7722 Creates a new SV and initializes it with the string formatted like
7729 Perl_newSVpvf(pTHX_ const char* pat, ...)
7733 va_start(args, pat);
7734 sv = vnewSVpvf(pat, &args);
7739 /* backend for newSVpvf() and newSVpvf_nocontext() */
7742 Perl_vnewSVpvf(pTHX_ const char* pat, va_list* args)
7746 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
7753 Creates a new SV and copies a floating point value into it.
7754 The reference count for the SV is set to 1.
7760 Perl_newSVnv(pTHX_ NV n)
7772 Creates a new SV and copies an integer into it. The reference count for the
7779 Perl_newSViv(pTHX_ IV i)
7791 Creates a new SV and copies an unsigned integer into it.
7792 The reference count for the SV is set to 1.
7798 Perl_newSVuv(pTHX_ UV u)
7808 =for apidoc newRV_noinc
7810 Creates an RV wrapper for an SV. The reference count for the original
7811 SV is B<not> incremented.
7817 Perl_newRV_noinc(pTHX_ SV *tmpRef)
7822 sv_upgrade(sv, SVt_RV);
7829 /* newRV_inc is the official function name to use now.
7830 * newRV_inc is in fact #defined to newRV in sv.h
7834 Perl_newRV(pTHX_ SV *tmpRef)
7836 return newRV_noinc(SvREFCNT_inc(tmpRef));
7842 Creates a new SV which is an exact duplicate of the original SV.
7849 Perl_newSVsv(pTHX_ register SV *old)
7855 if (SvTYPE(old) == SVTYPEMASK) {
7856 if (ckWARN_d(WARN_INTERNAL))
7857 Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "semi-panic: attempt to dup freed string");
7872 =for apidoc sv_reset
7874 Underlying implementation for the C<reset> Perl function.
7875 Note that the perl-level function is vaguely deprecated.
7881 Perl_sv_reset(pTHX_ register char *s, HV *stash)
7889 char todo[PERL_UCHAR_MAX+1];
7894 if (!*s) { /* reset ?? searches */
7895 for (pm = HvPMROOT(stash); pm; pm = pm->op_pmnext) {
7896 pm->op_pmdynflags &= ~PMdf_USED;
7901 /* reset variables */
7903 if (!HvARRAY(stash))
7906 Zero(todo, 256, char);
7908 i = (unsigned char)*s;
7912 max = (unsigned char)*s++;
7913 for ( ; i <= max; i++) {
7916 for (i = 0; i <= (I32) HvMAX(stash); i++) {
7917 for (entry = HvARRAY(stash)[i];
7919 entry = HeNEXT(entry))
7921 if (!todo[(U8)*HeKEY(entry)])
7923 gv = (GV*)HeVAL(entry);
7925 if (SvTHINKFIRST(sv)) {
7926 if (!SvREADONLY(sv) && SvROK(sv))
7931 if (SvTYPE(sv) >= SVt_PV) {
7933 if (SvPVX(sv) != Nullch)
7940 if (GvHV(gv) && !HvNAME(GvHV(gv))) {
7943 #ifdef USE_ENVIRON_ARRAY
7945 # ifdef USE_ITHREADS
7946 && PL_curinterp == aTHX
7950 environ[0] = Nullch;
7953 #endif /* !PERL_MICRO */
7963 Using various gambits, try to get an IO from an SV: the IO slot if its a
7964 GV; or the recursive result if we're an RV; or the IO slot of the symbol
7965 named after the PV if we're a string.
7971 Perl_sv_2io(pTHX_ SV *sv)
7977 switch (SvTYPE(sv)) {
7985 Perl_croak(aTHX_ "Bad filehandle: %s", GvNAME(gv));
7989 Perl_croak(aTHX_ PL_no_usym, "filehandle");
7991 return sv_2io(SvRV(sv));
7992 gv = gv_fetchpv(SvPV(sv,n_a), FALSE, SVt_PVIO);
7998 Perl_croak(aTHX_ "Bad filehandle: %"SVf, sv);
8007 Using various gambits, try to get a CV from an SV; in addition, try if
8008 possible to set C<*st> and C<*gvp> to the stash and GV associated with it.
8014 Perl_sv_2cv(pTHX_ SV *sv, HV **st, GV **gvp, I32 lref)
8021 return *gvp = Nullgv, Nullcv;
8022 switch (SvTYPE(sv)) {
8041 SV **sp = &sv; /* Used in tryAMAGICunDEREF macro. */
8042 tryAMAGICunDEREF(to_cv);
8045 if (SvTYPE(sv) == SVt_PVCV) {
8054 Perl_croak(aTHX_ "Not a subroutine reference");
8059 gv = gv_fetchpv(SvPV(sv, n_a), lref, SVt_PVCV);
8065 if (lref && !GvCVu(gv)) {
8068 tmpsv = NEWSV(704,0);
8069 gv_efullname3(tmpsv, gv, Nullch);
8070 /* XXX this is probably not what they think they're getting.
8071 * It has the same effect as "sub name;", i.e. just a forward
8073 newSUB(start_subparse(FALSE, 0),
8074 newSVOP(OP_CONST, 0, tmpsv),
8079 Perl_croak(aTHX_ "Unable to create sub named \"%"SVf"\"",
8089 Returns true if the SV has a true value by Perl's rules.
8090 Use the C<SvTRUE> macro instead, which may call C<sv_true()> or may
8091 instead use an in-line version.
8097 Perl_sv_true(pTHX_ register SV *sv)
8103 if ((tXpv = (XPV*)SvANY(sv)) &&
8104 (tXpv->xpv_cur > 1 ||
8105 (tXpv->xpv_cur && *tXpv->xpv_pv != '0')))
8112 return SvIVX(sv) != 0;
8115 return SvNVX(sv) != 0.0;
8117 return sv_2bool(sv);
8125 A private implementation of the C<SvIVx> macro for compilers which can't
8126 cope with complex macro expressions. Always use the macro instead.
8132 Perl_sv_iv(pTHX_ register SV *sv)
8136 return (IV)SvUVX(sv);
8145 A private implementation of the C<SvUVx> macro for compilers which can't
8146 cope with complex macro expressions. Always use the macro instead.
8152 Perl_sv_uv(pTHX_ register SV *sv)
8157 return (UV)SvIVX(sv);
8165 A private implementation of the C<SvNVx> macro for compilers which can't
8166 cope with complex macro expressions. Always use the macro instead.
8172 Perl_sv_nv(pTHX_ register SV *sv)
8179 /* sv_pv() is now a macro using SvPV_nolen();
8180 * this function provided for binary compatibility only
8184 Perl_sv_pv(pTHX_ SV *sv)
8191 return sv_2pv(sv, &n_a);
8197 Use the C<SvPV_nolen> macro instead
8201 A private implementation of the C<SvPV> macro for compilers which can't
8202 cope with complex macro expressions. Always use the macro instead.
8208 Perl_sv_pvn(pTHX_ SV *sv, STRLEN *lp)
8214 return sv_2pv(sv, lp);
8219 Perl_sv_pvn_nomg(pTHX_ register SV *sv, STRLEN *lp)
8225 return sv_2pv_flags(sv, lp, 0);
8228 /* sv_pvn_force() is now a macro using Perl_sv_pvn_force_flags();
8229 * this function provided for binary compatibility only
8233 Perl_sv_pvn_force(pTHX_ SV *sv, STRLEN *lp)
8235 return sv_pvn_force_flags(sv, lp, SV_GMAGIC);
8239 =for apidoc sv_pvn_force
8241 Get a sensible string out of the SV somehow.
8242 A private implementation of the C<SvPV_force> macro for compilers which
8243 can't cope with complex macro expressions. Always use the macro instead.
8245 =for apidoc sv_pvn_force_flags
8247 Get a sensible string out of the SV somehow.
8248 If C<flags> has C<SV_GMAGIC> bit set, will C<mg_get> on C<sv> if
8249 appropriate, else not. C<sv_pvn_force> and C<sv_pvn_force_nomg> are
8250 implemented in terms of this function.
8251 You normally want to use the various wrapper macros instead: see
8252 C<SvPV_force> and C<SvPV_force_nomg>
8258 Perl_sv_pvn_force_flags(pTHX_ SV *sv, STRLEN *lp, I32 flags)
8262 if (SvTHINKFIRST(sv) && !SvROK(sv))
8263 sv_force_normal_flags(sv, 0);
8269 if (SvTYPE(sv) > SVt_PVLV && SvTYPE(sv) != SVt_PVFM) {
8270 Perl_croak(aTHX_ "Can't coerce %s to string in %s", sv_reftype(sv,0),
8274 s = sv_2pv_flags(sv, lp, flags);
8275 if (s != SvPVX(sv)) { /* Almost, but not quite, sv_setpvn() */
8280 (void)SvUPGRADE(sv, SVt_PV); /* Never FALSE */
8281 SvGROW(sv, len + 1);
8282 Move(s,SvPVX(sv),len,char);
8287 SvPOK_on(sv); /* validate pointer */
8289 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2pv(%s)\n",
8290 PTR2UV(sv),SvPVX(sv)));
8296 /* sv_pvbyte () is now a macro using Perl_sv_2pv_flags();
8297 * this function provided for binary compatibility only
8301 Perl_sv_pvbyte(pTHX_ SV *sv)
8303 sv_utf8_downgrade(sv,0);
8308 =for apidoc sv_pvbyte
8310 Use C<SvPVbyte_nolen> instead.
8312 =for apidoc sv_pvbyten
8314 A private implementation of the C<SvPVbyte> macro for compilers
8315 which can't cope with complex macro expressions. Always use the macro
8322 Perl_sv_pvbyten(pTHX_ SV *sv, STRLEN *lp)
8324 sv_utf8_downgrade(sv,0);
8325 return sv_pvn(sv,lp);
8329 =for apidoc sv_pvbyten_force
8331 A private implementation of the C<SvPVbytex_force> macro for compilers
8332 which can't cope with complex macro expressions. Always use the macro
8339 Perl_sv_pvbyten_force(pTHX_ SV *sv, STRLEN *lp)
8341 sv_pvn_force(sv,lp);
8342 sv_utf8_downgrade(sv,0);
8347 /* sv_pvutf8 () is now a macro using Perl_sv_2pv_flags();
8348 * this function provided for binary compatibility only
8352 Perl_sv_pvutf8(pTHX_ SV *sv)
8354 sv_utf8_upgrade(sv);
8359 =for apidoc sv_pvutf8
8361 Use the C<SvPVutf8_nolen> macro instead
8363 =for apidoc sv_pvutf8n
8365 A private implementation of the C<SvPVutf8> macro for compilers
8366 which can't cope with complex macro expressions. Always use the macro
8373 Perl_sv_pvutf8n(pTHX_ SV *sv, STRLEN *lp)
8375 sv_utf8_upgrade(sv);
8376 return sv_pvn(sv,lp);
8380 =for apidoc sv_pvutf8n_force
8382 A private implementation of the C<SvPVutf8_force> macro for compilers
8383 which can't cope with complex macro expressions. Always use the macro
8390 Perl_sv_pvutf8n_force(pTHX_ SV *sv, STRLEN *lp)
8392 sv_pvn_force(sv,lp);
8393 sv_utf8_upgrade(sv);
8399 =for apidoc sv_reftype
8401 Returns a string describing what the SV is a reference to.
8407 Perl_sv_reftype(pTHX_ SV *sv, int ob)
8409 if (ob && SvOBJECT(sv)) {
8410 char *name = HvNAME(SvSTASH(sv));
8411 return name ? name : "__ANON__";
8414 switch (SvTYPE(sv)) {
8431 case SVt_PVLV: return SvROK(sv) ? "REF"
8432 /* tied lvalues should appear to be
8433 * scalars for backwards compatitbility */
8434 : (LvTYPE(sv) == 't' || LvTYPE(sv) == 'T')
8435 ? "SCALAR" : "LVALUE";
8436 case SVt_PVAV: return "ARRAY";
8437 case SVt_PVHV: return "HASH";
8438 case SVt_PVCV: return "CODE";
8439 case SVt_PVGV: return "GLOB";
8440 case SVt_PVFM: return "FORMAT";
8441 case SVt_PVIO: return "IO";
8442 default: return "UNKNOWN";
8448 =for apidoc sv_isobject
8450 Returns a boolean indicating whether the SV is an RV pointing to a blessed
8451 object. If the SV is not an RV, or if the object is not blessed, then this
8458 Perl_sv_isobject(pTHX_ SV *sv)
8475 Returns a boolean indicating whether the SV is blessed into the specified
8476 class. This does not check for subtypes; use C<sv_derived_from> to verify
8477 an inheritance relationship.
8483 Perl_sv_isa(pTHX_ SV *sv, const char *name)
8494 if (!HvNAME(SvSTASH(sv)))
8497 return strEQ(HvNAME(SvSTASH(sv)), name);
8503 Creates a new SV for the RV, C<rv>, to point to. If C<rv> is not an RV then
8504 it will be upgraded to one. If C<classname> is non-null then the new SV will
8505 be blessed in the specified package. The new SV is returned and its
8506 reference count is 1.
8512 Perl_newSVrv(pTHX_ SV *rv, const char *classname)
8518 SV_CHECK_THINKFIRST_COW_DROP(rv);
8521 if (SvTYPE(rv) >= SVt_PVMG) {
8522 U32 refcnt = SvREFCNT(rv);
8526 SvREFCNT(rv) = refcnt;
8529 if (SvTYPE(rv) < SVt_RV)
8530 sv_upgrade(rv, SVt_RV);
8531 else if (SvTYPE(rv) > SVt_RV) {
8533 if (SvPVX(rv) && SvLEN(rv))
8534 Safefree(SvPVX(rv));
8544 HV* stash = gv_stashpv(classname, TRUE);
8545 (void)sv_bless(rv, stash);
8551 =for apidoc sv_setref_pv
8553 Copies a pointer into a new SV, optionally blessing the SV. The C<rv>
8554 argument will be upgraded to an RV. That RV will be modified to point to
8555 the new SV. If the C<pv> argument is NULL then C<PL_sv_undef> will be placed
8556 into the SV. The C<classname> argument indicates the package for the
8557 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
8558 will have a reference count of 1, and the RV will be returned.
8560 Do not use with other Perl types such as HV, AV, SV, CV, because those
8561 objects will become corrupted by the pointer copy process.
8563 Note that C<sv_setref_pvn> copies the string while this copies the pointer.
8569 Perl_sv_setref_pv(pTHX_ SV *rv, const char *classname, void *pv)
8572 sv_setsv(rv, &PL_sv_undef);
8576 sv_setiv(newSVrv(rv,classname), PTR2IV(pv));
8581 =for apidoc sv_setref_iv
8583 Copies an integer into a new SV, optionally blessing the SV. The C<rv>
8584 argument will be upgraded to an RV. That RV will be modified to point to
8585 the new SV. The C<classname> argument indicates the package for the
8586 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
8587 will have a reference count of 1, and the RV will be returned.
8593 Perl_sv_setref_iv(pTHX_ SV *rv, const char *classname, IV iv)
8595 sv_setiv(newSVrv(rv,classname), iv);
8600 =for apidoc sv_setref_uv
8602 Copies an unsigned integer into a new SV, optionally blessing the SV. The C<rv>
8603 argument will be upgraded to an RV. That RV will be modified to point to
8604 the new SV. The C<classname> argument indicates the package for the
8605 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
8606 will have a reference count of 1, and the RV will be returned.
8612 Perl_sv_setref_uv(pTHX_ SV *rv, const char *classname, UV uv)
8614 sv_setuv(newSVrv(rv,classname), uv);
8619 =for apidoc sv_setref_nv
8621 Copies a double into a new SV, optionally blessing the SV. The C<rv>
8622 argument will be upgraded to an RV. That RV will be modified to point to
8623 the new SV. The C<classname> argument indicates the package for the
8624 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
8625 will have a reference count of 1, and the RV will be returned.
8631 Perl_sv_setref_nv(pTHX_ SV *rv, const char *classname, NV nv)
8633 sv_setnv(newSVrv(rv,classname), nv);
8638 =for apidoc sv_setref_pvn
8640 Copies a string into a new SV, optionally blessing the SV. The length of the
8641 string must be specified with C<n>. The C<rv> argument will be upgraded to
8642 an RV. That RV will be modified to point to the new SV. The C<classname>
8643 argument indicates the package for the blessing. Set C<classname> to
8644 C<Nullch> to avoid the blessing. The new SV will have a reference count
8645 of 1, and the RV will be returned.
8647 Note that C<sv_setref_pv> copies the pointer while this copies the string.
8653 Perl_sv_setref_pvn(pTHX_ SV *rv, const char *classname, char *pv, STRLEN n)
8655 sv_setpvn(newSVrv(rv,classname), pv, n);
8660 =for apidoc sv_bless
8662 Blesses an SV into a specified package. The SV must be an RV. The package
8663 must be designated by its stash (see C<gv_stashpv()>). The reference count
8664 of the SV is unaffected.
8670 Perl_sv_bless(pTHX_ SV *sv, HV *stash)
8674 Perl_croak(aTHX_ "Can't bless non-reference value");
8676 if (SvFLAGS(tmpRef) & (SVs_OBJECT|SVf_READONLY)) {
8677 if (SvREADONLY(tmpRef))
8678 Perl_croak(aTHX_ PL_no_modify);
8679 if (SvOBJECT(tmpRef)) {
8680 if (SvTYPE(tmpRef) != SVt_PVIO)
8682 SvREFCNT_dec(SvSTASH(tmpRef));
8685 SvOBJECT_on(tmpRef);
8686 if (SvTYPE(tmpRef) != SVt_PVIO)
8688 (void)SvUPGRADE(tmpRef, SVt_PVMG);
8689 SvSTASH(tmpRef) = (HV*)SvREFCNT_inc(stash);
8696 if(SvSMAGICAL(tmpRef))
8697 if(mg_find(tmpRef, PERL_MAGIC_ext) || mg_find(tmpRef, PERL_MAGIC_uvar))
8705 /* Downgrades a PVGV to a PVMG.
8709 S_sv_unglob(pTHX_ SV *sv)
8713 assert(SvTYPE(sv) == SVt_PVGV);
8718 SvREFCNT_dec(GvSTASH(sv));
8719 GvSTASH(sv) = Nullhv;
8721 sv_unmagic(sv, PERL_MAGIC_glob);
8722 Safefree(GvNAME(sv));
8725 /* need to keep SvANY(sv) in the right arena */
8726 xpvmg = new_XPVMG();
8727 StructCopy(SvANY(sv), xpvmg, XPVMG);
8728 del_XPVGV(SvANY(sv));
8731 SvFLAGS(sv) &= ~SVTYPEMASK;
8732 SvFLAGS(sv) |= SVt_PVMG;
8736 =for apidoc sv_unref_flags
8738 Unsets the RV status of the SV, and decrements the reference count of
8739 whatever was being referenced by the RV. This can almost be thought of
8740 as a reversal of C<newSVrv>. The C<cflags> argument can contain
8741 C<SV_IMMEDIATE_UNREF> to force the reference count to be decremented
8742 (otherwise the decrementing is conditional on the reference count being
8743 different from one or the reference being a readonly SV).
8750 Perl_sv_unref_flags(pTHX_ SV *sv, U32 flags)
8754 if (SvWEAKREF(sv)) {
8762 /* You can't have a || SvREADONLY(rv) here, as $a = $$a, where $a was
8763 assigned to as BEGIN {$a = \"Foo"} will fail. */
8764 if (SvREFCNT(rv) != 1 || (flags & SV_IMMEDIATE_UNREF))
8766 else /* XXX Hack, but hard to make $a=$a->[1] work otherwise */
8767 sv_2mortal(rv); /* Schedule for freeing later */
8771 =for apidoc sv_unref
8773 Unsets the RV status of the SV, and decrements the reference count of
8774 whatever was being referenced by the RV. This can almost be thought of
8775 as a reversal of C<newSVrv>. This is C<sv_unref_flags> with the C<flag>
8776 being zero. See C<SvROK_off>.
8782 Perl_sv_unref(pTHX_ SV *sv)
8784 sv_unref_flags(sv, 0);
8788 =for apidoc sv_taint
8790 Taint an SV. Use C<SvTAINTED_on> instead.
8795 Perl_sv_taint(pTHX_ SV *sv)
8797 sv_magic((sv), Nullsv, PERL_MAGIC_taint, Nullch, 0);
8801 =for apidoc sv_untaint
8803 Untaint an SV. Use C<SvTAINTED_off> instead.
8808 Perl_sv_untaint(pTHX_ SV *sv)
8810 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) {
8811 MAGIC *mg = mg_find(sv, PERL_MAGIC_taint);
8818 =for apidoc sv_tainted
8820 Test an SV for taintedness. Use C<SvTAINTED> instead.
8825 Perl_sv_tainted(pTHX_ SV *sv)
8827 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) {
8828 MAGIC *mg = mg_find(sv, PERL_MAGIC_taint);
8829 if (mg && ((mg->mg_len & 1) || ((mg->mg_len & 2) && mg->mg_obj == sv)))
8836 =for apidoc sv_setpviv
8838 Copies an integer into the given SV, also updating its string value.
8839 Does not handle 'set' magic. See C<sv_setpviv_mg>.
8845 Perl_sv_setpviv(pTHX_ SV *sv, IV iv)
8847 char buf[TYPE_CHARS(UV)];
8849 char *ptr = uiv_2buf(buf, iv, 0, 0, &ebuf);
8851 sv_setpvn(sv, ptr, ebuf - ptr);
8855 =for apidoc sv_setpviv_mg
8857 Like C<sv_setpviv>, but also handles 'set' magic.
8863 Perl_sv_setpviv_mg(pTHX_ SV *sv, IV iv)
8865 char buf[TYPE_CHARS(UV)];
8867 char *ptr = uiv_2buf(buf, iv, 0, 0, &ebuf);
8869 sv_setpvn(sv, ptr, ebuf - ptr);
8873 #if defined(PERL_IMPLICIT_CONTEXT)
8875 /* pTHX_ magic can't cope with varargs, so this is a no-context
8876 * version of the main function, (which may itself be aliased to us).
8877 * Don't access this version directly.
8881 Perl_sv_setpvf_nocontext(SV *sv, const char* pat, ...)
8885 va_start(args, pat);
8886 sv_vsetpvf(sv, pat, &args);
8890 /* pTHX_ magic can't cope with varargs, so this is a no-context
8891 * version of the main function, (which may itself be aliased to us).
8892 * Don't access this version directly.
8896 Perl_sv_setpvf_mg_nocontext(SV *sv, const char* pat, ...)
8900 va_start(args, pat);
8901 sv_vsetpvf_mg(sv, pat, &args);
8907 =for apidoc sv_setpvf
8909 Works like C<sv_catpvf> but copies the text into the SV instead of
8910 appending it. Does not handle 'set' magic. See C<sv_setpvf_mg>.
8916 Perl_sv_setpvf(pTHX_ SV *sv, const char* pat, ...)
8919 va_start(args, pat);
8920 sv_vsetpvf(sv, pat, &args);
8925 =for apidoc sv_vsetpvf
8927 Works like C<sv_vcatpvf> but copies the text into the SV instead of
8928 appending it. Does not handle 'set' magic. See C<sv_vsetpvf_mg>.
8930 Usually used via its frontend C<sv_setpvf>.
8936 Perl_sv_vsetpvf(pTHX_ SV *sv, const char* pat, va_list* args)
8938 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
8942 =for apidoc sv_setpvf_mg
8944 Like C<sv_setpvf>, but also handles 'set' magic.
8950 Perl_sv_setpvf_mg(pTHX_ SV *sv, const char* pat, ...)
8953 va_start(args, pat);
8954 sv_vsetpvf_mg(sv, pat, &args);
8959 =for apidoc sv_vsetpvf_mg
8961 Like C<sv_vsetpvf>, but also handles 'set' magic.
8963 Usually used via its frontend C<sv_setpvf_mg>.
8969 Perl_sv_vsetpvf_mg(pTHX_ SV *sv, const char* pat, va_list* args)
8971 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
8975 #if defined(PERL_IMPLICIT_CONTEXT)
8977 /* pTHX_ magic can't cope with varargs, so this is a no-context
8978 * version of the main function, (which may itself be aliased to us).
8979 * Don't access this version directly.
8983 Perl_sv_catpvf_nocontext(SV *sv, const char* pat, ...)
8987 va_start(args, pat);
8988 sv_vcatpvf(sv, pat, &args);
8992 /* pTHX_ magic can't cope with varargs, so this is a no-context
8993 * version of the main function, (which may itself be aliased to us).
8994 * Don't access this version directly.
8998 Perl_sv_catpvf_mg_nocontext(SV *sv, const char* pat, ...)
9002 va_start(args, pat);
9003 sv_vcatpvf_mg(sv, pat, &args);
9009 =for apidoc sv_catpvf
9011 Processes its arguments like C<sprintf> and appends the formatted
9012 output to an SV. If the appended data contains "wide" characters
9013 (including, but not limited to, SVs with a UTF-8 PV formatted with %s,
9014 and characters >255 formatted with %c), the original SV might get
9015 upgraded to UTF-8. Handles 'get' magic, but not 'set' magic. See
9021 Perl_sv_catpvf(pTHX_ SV *sv, const char* pat, ...)
9024 va_start(args, pat);
9025 sv_vcatpvf(sv, pat, &args);
9030 =for apidoc sv_vcatpvf
9032 Processes its arguments like C<vsprintf> and appends the formatted output
9033 to an SV. Does not handle 'set' magic. See C<sv_vcatpvf_mg>.
9035 Usually used via its frontend C<sv_catpvf>.
9041 Perl_sv_vcatpvf(pTHX_ SV *sv, const char* pat, va_list* args)
9043 sv_vcatpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
9047 =for apidoc sv_catpvf_mg
9049 Like C<sv_catpvf>, but also handles 'set' magic.
9055 Perl_sv_catpvf_mg(pTHX_ SV *sv, const char* pat, ...)
9058 va_start(args, pat);
9059 sv_vcatpvf_mg(sv, pat, &args);
9064 =for apidoc sv_vcatpvf_mg
9066 Like C<sv_vcatpvf>, but also handles 'set' magic.
9068 Usually used via its frontend C<sv_catpvf_mg>.
9074 Perl_sv_vcatpvf_mg(pTHX_ SV *sv, const char* pat, va_list* args)
9076 sv_vcatpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
9081 =for apidoc sv_vsetpvfn
9083 Works like C<sv_vcatpvfn> but copies the text into the SV instead of
9086 Usually used via one of its frontends C<sv_vsetpvf> and C<sv_vsetpvf_mg>.
9092 Perl_sv_vsetpvfn(pTHX_ SV *sv, const char *pat, STRLEN patlen, va_list *args, SV **svargs, I32 svmax, bool *maybe_tainted)
9094 sv_setpvn(sv, "", 0);
9095 sv_vcatpvfn(sv, pat, patlen, args, svargs, svmax, maybe_tainted);
9098 /* private function for use in sv_vcatpvfn via the EXPECT_NUMBER macro */
9101 S_expect_number(pTHX_ char** pattern)
9104 switch (**pattern) {
9105 case '1': case '2': case '3':
9106 case '4': case '5': case '6':
9107 case '7': case '8': case '9':
9108 while (isDIGIT(**pattern))
9109 var = var * 10 + (*(*pattern)++ - '0');
9113 #define EXPECT_NUMBER(pattern, var) (var = S_expect_number(aTHX_ &pattern))
9116 F0convert(NV nv, char *endbuf, STRLEN *len)
9127 if (uv & 1 && uv == nv)
9128 uv--; /* Round to even */
9130 unsigned dig = uv % 10;
9143 =for apidoc sv_vcatpvfn
9145 Processes its arguments like C<vsprintf> and appends the formatted output
9146 to an SV. Uses an array of SVs if the C style variable argument list is
9147 missing (NULL). When running with taint checks enabled, indicates via
9148 C<maybe_tainted> if results are untrustworthy (often due to the use of
9151 Usually used via one of its frontends C<sv_vcatpvf> and C<sv_vcatpvf_mg>.
9157 Perl_sv_vcatpvfn(pTHX_ SV *sv, const char *pat, STRLEN patlen, va_list *args, SV **svargs, I32 svmax, bool *maybe_tainted)
9164 static char nullstr[] = "(null)";
9166 bool has_utf8; /* has the result utf8? */
9167 bool pat_utf8; /* the pattern is in utf8? */
9169 /* Times 4: a decimal digit takes more than 3 binary digits.
9170 * NV_DIG: mantissa takes than many decimal digits.
9171 * Plus 32: Playing safe. */
9172 char ebuf[IV_DIG * 4 + NV_DIG + 32];
9173 /* large enough for "%#.#f" --chip */
9174 /* what about long double NVs? --jhi */
9176 has_utf8 = pat_utf8 = DO_UTF8(sv);
9178 /* no matter what, this is a string now */
9179 (void)SvPV_force(sv, origlen);
9181 /* special-case "", "%s", and "%_" */
9184 if (patlen == 2 && pat[0] == '%') {
9188 char *s = va_arg(*args, char*);
9189 sv_catpv(sv, s ? s : nullstr);
9191 else if (svix < svmax) {
9192 sv_catsv(sv, *svargs);
9193 if (DO_UTF8(*svargs))
9199 argsv = va_arg(*args, SV*);
9200 sv_catsv(sv, argsv);
9205 /* See comment on '_' below */
9210 #ifndef USE_LONG_DOUBLE
9211 /* special-case "%.<number>[gf]" */
9212 if ( patlen <= 5 && pat[0] == '%' && pat[1] == '.'
9213 && (pat[patlen-1] == 'g' || pat[patlen-1] == 'f') ) {
9214 unsigned digits = 0;
9218 while (*pp >= '0' && *pp <= '9')
9219 digits = 10 * digits + (*pp++ - '0');
9220 if (pp - pat == (int)patlen - 1) {
9224 nv = (NV)va_arg(*args, double);
9225 else if (svix < svmax)
9230 /* Add check for digits != 0 because it seems that some
9231 gconverts are buggy in this case, and we don't yet have
9232 a Configure test for this. */
9233 if (digits && digits < sizeof(ebuf) - NV_DIG - 10) {
9234 /* 0, point, slack */
9235 Gconvert(nv, (int)digits, 0, ebuf);
9237 if (*ebuf) /* May return an empty string for digits==0 */
9240 } else if (!digits) {
9243 if ((p = F0convert(nv, ebuf + sizeof ebuf, &l))) {
9244 sv_catpvn(sv, p, l);
9250 #endif /* !USE_LONG_DOUBLE */
9252 if (!args && svix < svmax && DO_UTF8(*svargs))
9255 patend = (char*)pat + patlen;
9256 for (p = (char*)pat; p < patend; p = q) {
9259 bool vectorize = FALSE;
9260 bool vectorarg = FALSE;
9261 bool vec_utf8 = FALSE;
9267 bool has_precis = FALSE;
9270 bool is_utf8 = FALSE; /* is this item utf8? */
9271 #ifdef HAS_LDBL_SPRINTF_BUG
9272 /* This is to try to fix a bug with irix/nonstop-ux/powerux and
9273 with sfio - Allen <allens@cpan.org> */
9274 bool fix_ldbl_sprintf_bug = FALSE;
9278 U8 utf8buf[UTF8_MAXLEN+1];
9279 STRLEN esignlen = 0;
9281 char *eptr = Nullch;
9284 U8 *vecstr = Null(U8*);
9291 /* we need a long double target in case HAS_LONG_DOUBLE but
9294 #if defined(HAS_LONG_DOUBLE) && LONG_DOUBLESIZE > DOUBLESIZE
9303 STRLEN dotstrlen = 1;
9304 I32 efix = 0; /* explicit format parameter index */
9305 I32 ewix = 0; /* explicit width index */
9306 I32 epix = 0; /* explicit precision index */
9307 I32 evix = 0; /* explicit vector index */
9308 bool asterisk = FALSE;
9310 /* echo everything up to the next format specification */
9311 for (q = p; q < patend && *q != '%'; ++q) ;
9313 if (has_utf8 && !pat_utf8)
9314 sv_catpvn_utf8_upgrade(sv, p, q - p, nsv);
9316 sv_catpvn(sv, p, q - p);
9323 We allow format specification elements in this order:
9324 \d+\$ explicit format parameter index
9326 v|\*(\d+\$)?v vector with optional (optionally specified) arg
9327 0 flag (as above): repeated to allow "v02"
9328 \d+|\*(\d+\$)? width using optional (optionally specified) arg
9329 \.(\d*|\*(\d+\$)?) precision using optional (optionally specified) arg
9331 [%bcdefginopsux_DFOUX] format (mandatory)
9333 if (EXPECT_NUMBER(q, width)) {
9374 if (EXPECT_NUMBER(q, ewix))
9383 if ((vectorarg = asterisk)) {
9395 EXPECT_NUMBER(q, width);
9400 vecsv = va_arg(*args, SV*);
9402 vecsv = (evix ? evix <= svmax : svix < svmax) ?
9403 svargs[evix ? evix-1 : svix++] : &PL_sv_undef;
9404 dotstr = SvPVx(vecsv, dotstrlen);
9409 vecsv = va_arg(*args, SV*);
9410 vecstr = (U8*)SvPVx(vecsv,veclen);
9411 vec_utf8 = DO_UTF8(vecsv);
9413 else if (efix ? efix <= svmax : svix < svmax) {
9414 vecsv = svargs[efix ? efix-1 : svix++];
9415 vecstr = (U8*)SvPVx(vecsv,veclen);
9416 vec_utf8 = DO_UTF8(vecsv);
9417 /* if this is a version object, we need to return the
9418 * stringified representation (which the SvPVX has
9419 * already done for us), but not vectorize the args
9421 if ( *q == 'd' && sv_derived_from(vecsv,"version") )
9423 q++; /* skip past the rest of the %vd format */
9424 eptr = (char *) vecstr;
9425 elen = strlen(eptr);
9438 i = va_arg(*args, int);
9440 i = (ewix ? ewix <= svmax : svix < svmax) ?
9441 SvIVx(svargs[ewix ? ewix-1 : svix++]) : 0;
9443 width = (i < 0) ? -i : i;
9453 if (EXPECT_NUMBER(q, epix) && *q++ != '$')
9455 /* XXX: todo, support specified precision parameter */
9459 i = va_arg(*args, int);
9461 i = (ewix ? ewix <= svmax : svix < svmax)
9462 ? SvIVx(svargs[ewix ? ewix-1 : svix++]) : 0;
9463 precis = (i < 0) ? 0 : i;
9468 precis = precis * 10 + (*q++ - '0');
9477 case 'I': /* Ix, I32x, and I64x */
9479 if (q[1] == '6' && q[2] == '4') {
9485 if (q[1] == '3' && q[2] == '2') {
9495 #if defined(HAS_QUAD) || defined(HAS_LONG_DOUBLE)
9506 #if defined(HAS_QUAD) || defined(HAS_LONG_DOUBLE)
9507 if (*(q + 1) == 'l') { /* lld, llf */
9532 argsv = (efix ? efix <= svmax : svix < svmax) ?
9533 svargs[efix ? efix-1 : svix++] : &PL_sv_undef;
9540 uv = (args && !vectorize) ? va_arg(*args, int) : SvIVx(argsv);
9542 (!UNI_IS_INVARIANT(uv) && SvUTF8(sv)))
9544 eptr = (char*)utf8buf;
9545 elen = uvchr_to_utf8((U8*)eptr, uv) - utf8buf;
9556 if (args && !vectorize) {
9557 eptr = va_arg(*args, char*);
9559 #ifdef MACOS_TRADITIONAL
9560 /* On MacOS, %#s format is used for Pascal strings */
9565 elen = strlen(eptr);
9568 elen = sizeof nullstr - 1;
9572 eptr = SvPVx(argsv, elen);
9573 if (DO_UTF8(argsv)) {
9574 if (has_precis && precis < elen) {
9576 sv_pos_u2b(argsv, &p, 0); /* sticks at end */
9579 if (width) { /* fudge width (can't fudge elen) */
9580 width += elen - sv_len_utf8(argsv);
9589 * The "%_" hack might have to be changed someday,
9590 * if ISO or ANSI decide to use '_' for something.
9591 * So we keep it hidden from users' code.
9593 if (!args || vectorize)
9595 argsv = va_arg(*args, SV*);
9596 eptr = SvPVx(argsv, elen);
9602 if (has_precis && elen > precis)
9609 if (alt || vectorize)
9611 uv = PTR2UV(args ? va_arg(*args, void*) : argsv);
9629 uv = utf8n_to_uvchr(vecstr, veclen, &ulen,
9638 esignbuf[esignlen++] = plus;
9642 case 'h': iv = (short)va_arg(*args, int); break;
9643 case 'l': iv = va_arg(*args, long); break;
9644 case 'V': iv = va_arg(*args, IV); break;
9645 default: iv = va_arg(*args, int); break;
9647 case 'q': iv = va_arg(*args, Quad_t); break;
9652 IV tiv = SvIVx(argsv); /* work around GCC bug #13488 */
9654 case 'h': iv = (short)tiv; break;
9655 case 'l': iv = (long)tiv; break;
9657 default: iv = tiv; break;
9659 case 'q': iv = (Quad_t)tiv; break;
9663 if ( !vectorize ) /* we already set uv above */
9668 esignbuf[esignlen++] = plus;
9672 esignbuf[esignlen++] = '-';
9715 uv = utf8n_to_uvchr(vecstr, veclen, &ulen,
9726 case 'h': uv = (unsigned short)va_arg(*args, unsigned); break;
9727 case 'l': uv = va_arg(*args, unsigned long); break;
9728 case 'V': uv = va_arg(*args, UV); break;
9729 default: uv = va_arg(*args, unsigned); break;
9731 case 'q': uv = va_arg(*args, Uquad_t); break;
9736 UV tuv = SvUVx(argsv); /* work around GCC bug #13488 */
9738 case 'h': uv = (unsigned short)tuv; break;
9739 case 'l': uv = (unsigned long)tuv; break;
9741 default: uv = tuv; break;
9743 case 'q': uv = (Uquad_t)tuv; break;
9749 eptr = ebuf + sizeof ebuf;
9755 p = (char*)((c == 'X')
9756 ? "0123456789ABCDEF" : "0123456789abcdef");
9762 esignbuf[esignlen++] = '0';
9763 esignbuf[esignlen++] = c; /* 'x' or 'X' */
9769 *--eptr = '0' + dig;
9771 if (alt && *eptr != '0')
9777 *--eptr = '0' + dig;
9780 esignbuf[esignlen++] = '0';
9781 esignbuf[esignlen++] = 'b';
9784 default: /* it had better be ten or less */
9785 #if defined(PERL_Y2KWARN)
9786 if (ckWARN(WARN_Y2K)) {
9788 char *s = SvPV(sv,n);
9789 if (n >= 2 && s[n-2] == '1' && s[n-1] == '9'
9790 && (n == 2 || !isDIGIT(s[n-3])))
9792 Perl_warner(aTHX_ packWARN(WARN_Y2K),
9793 "Possible Y2K bug: %%%c %s",
9794 c, "format string following '19'");
9800 *--eptr = '0' + dig;
9801 } while (uv /= base);
9804 elen = (ebuf + sizeof ebuf) - eptr;
9807 zeros = precis - elen;
9808 else if (precis == 0 && elen == 1 && *eptr == '0')
9813 /* FLOATING POINT */
9816 c = 'f'; /* maybe %F isn't supported here */
9822 /* This is evil, but floating point is even more evil */
9824 /* for SV-style calling, we can only get NV
9825 for C-style calling, we assume %f is double;
9826 for simplicity we allow any of %Lf, %llf, %qf for long double
9830 #if defined(USE_LONG_DOUBLE)
9834 /* [perl #20339] - we should accept and ignore %lf rather than die */
9838 #if defined(USE_LONG_DOUBLE)
9839 intsize = args ? 0 : 'q';
9843 #if defined(HAS_LONG_DOUBLE)
9852 /* now we need (long double) if intsize == 'q', else (double) */
9853 nv = (args && !vectorize) ?
9854 #if LONG_DOUBLESIZE > DOUBLESIZE
9856 va_arg(*args, long double) :
9857 va_arg(*args, double)
9859 va_arg(*args, double)
9865 if (c != 'e' && c != 'E') {
9867 /* FIXME: if HAS_LONG_DOUBLE but not USE_LONG_DOUBLE this
9868 will cast our (long double) to (double) */
9869 (void)Perl_frexp(nv, &i);
9870 if (i == PERL_INT_MIN)
9871 Perl_die(aTHX_ "panic: frexp");
9873 need = BIT_DIGITS(i);
9875 need += has_precis ? precis : 6; /* known default */
9880 #ifdef HAS_LDBL_SPRINTF_BUG
9881 /* This is to try to fix a bug with irix/nonstop-ux/powerux and
9882 with sfio - Allen <allens@cpan.org> */
9885 # define MY_DBL_MAX DBL_MAX
9886 # else /* XXX guessing! HUGE_VAL may be defined as infinity, so not using */
9887 # if DOUBLESIZE >= 8
9888 # define MY_DBL_MAX 1.7976931348623157E+308L
9890 # define MY_DBL_MAX 3.40282347E+38L
9894 # ifdef HAS_LDBL_SPRINTF_BUG_LESS1 /* only between -1L & 1L - Allen */
9895 # define MY_DBL_MAX_BUG 1L
9897 # define MY_DBL_MAX_BUG MY_DBL_MAX
9901 # define MY_DBL_MIN DBL_MIN
9902 # else /* XXX guessing! -Allen */
9903 # if DOUBLESIZE >= 8
9904 # define MY_DBL_MIN 2.2250738585072014E-308L
9906 # define MY_DBL_MIN 1.17549435E-38L
9910 if ((intsize == 'q') && (c == 'f') &&
9911 ((nv < MY_DBL_MAX_BUG) && (nv > -MY_DBL_MAX_BUG)) &&
9913 /* it's going to be short enough that
9914 * long double precision is not needed */
9916 if ((nv <= 0L) && (nv >= -0L))
9917 fix_ldbl_sprintf_bug = TRUE; /* 0 is 0 - easiest */
9919 /* would use Perl_fp_class as a double-check but not
9920 * functional on IRIX - see perl.h comments */
9922 if ((nv >= MY_DBL_MIN) || (nv <= -MY_DBL_MIN)) {
9923 /* It's within the range that a double can represent */
9924 #if defined(DBL_MAX) && !defined(DBL_MIN)
9925 if ((nv >= ((long double)1/DBL_MAX)) ||
9926 (nv <= (-(long double)1/DBL_MAX)))
9928 fix_ldbl_sprintf_bug = TRUE;
9931 if (fix_ldbl_sprintf_bug == TRUE) {
9941 # undef MY_DBL_MAX_BUG
9944 #endif /* HAS_LDBL_SPRINTF_BUG */
9946 need += 20; /* fudge factor */
9947 if (PL_efloatsize < need) {
9948 Safefree(PL_efloatbuf);
9949 PL_efloatsize = need + 20; /* more fudge */
9950 New(906, PL_efloatbuf, PL_efloatsize, char);
9951 PL_efloatbuf[0] = '\0';
9954 if ( !(width || left || plus || alt) && fill != '0'
9955 && has_precis && intsize != 'q' ) { /* Shortcuts */
9956 /* See earlier comment about buggy Gconvert when digits,
9958 if ( c == 'g' && precis) {
9959 Gconvert((NV)nv, (int)precis, 0, PL_efloatbuf);
9960 if (*PL_efloatbuf) /* May return an empty string for digits==0 */
9961 goto float_converted;
9962 } else if ( c == 'f' && !precis) {
9963 if ((eptr = F0convert(nv, ebuf + sizeof ebuf, &elen)))
9967 eptr = ebuf + sizeof ebuf;
9970 /* FIXME: what to do if HAS_LONG_DOUBLE but not PERL_PRIfldbl? */
9971 #if defined(HAS_LONG_DOUBLE) && defined(PERL_PRIfldbl)
9972 if (intsize == 'q') {
9973 /* Copy the one or more characters in a long double
9974 * format before the 'base' ([efgEFG]) character to
9975 * the format string. */
9976 static char const prifldbl[] = PERL_PRIfldbl;
9977 char const *p = prifldbl + sizeof(prifldbl) - 3;
9978 while (p >= prifldbl) { *--eptr = *p--; }
9983 do { *--eptr = '0' + (base % 10); } while (base /= 10);
9988 do { *--eptr = '0' + (base % 10); } while (base /= 10);
10000 /* No taint. Otherwise we are in the strange situation
10001 * where printf() taints but print($float) doesn't.
10003 #if defined(HAS_LONG_DOUBLE)
10004 if (intsize == 'q')
10005 (void)sprintf(PL_efloatbuf, eptr, nv);
10007 (void)sprintf(PL_efloatbuf, eptr, (double)nv);
10009 (void)sprintf(PL_efloatbuf, eptr, nv);
10012 eptr = PL_efloatbuf;
10013 elen = strlen(PL_efloatbuf);
10019 i = SvCUR(sv) - origlen;
10020 if (args && !vectorize) {
10022 case 'h': *(va_arg(*args, short*)) = i; break;
10023 default: *(va_arg(*args, int*)) = i; break;
10024 case 'l': *(va_arg(*args, long*)) = i; break;
10025 case 'V': *(va_arg(*args, IV*)) = i; break;
10027 case 'q': *(va_arg(*args, Quad_t*)) = i; break;
10032 sv_setuv_mg(argsv, (UV)i);
10034 continue; /* not "break" */
10040 if (!args && ckWARN(WARN_PRINTF) &&
10041 (PL_op->op_type == OP_PRTF || PL_op->op_type == OP_SPRINTF)) {
10042 SV *msg = sv_newmortal();
10043 Perl_sv_setpvf(aTHX_ msg, "Invalid conversion in %sprintf: ",
10044 (PL_op->op_type == OP_PRTF) ? "" : "s");
10047 Perl_sv_catpvf(aTHX_ msg,
10048 "\"%%%c\"", c & 0xFF);
10050 Perl_sv_catpvf(aTHX_ msg,
10051 "\"%%\\%03"UVof"\"",
10054 sv_catpv(msg, "end of string");
10055 Perl_warner(aTHX_ packWARN(WARN_PRINTF), "%"SVf, msg); /* yes, this is reentrant */
10058 /* output mangled stuff ... */
10064 /* ... right here, because formatting flags should not apply */
10065 SvGROW(sv, SvCUR(sv) + elen + 1);
10067 Copy(eptr, p, elen, char);
10070 SvCUR(sv) = p - SvPVX(sv);
10072 continue; /* not "break" */
10075 /* calculate width before utf8_upgrade changes it */
10076 have = esignlen + zeros + elen;
10078 if (is_utf8 != has_utf8) {
10081 sv_utf8_upgrade(sv);
10084 SV *nsv = sv_2mortal(newSVpvn(eptr, elen));
10085 sv_utf8_upgrade(nsv);
10089 SvGROW(sv, SvCUR(sv) + elen + 1);
10094 need = (have > width ? have : width);
10097 SvGROW(sv, SvCUR(sv) + need + dotstrlen + 1);
10099 if (esignlen && fill == '0') {
10100 for (i = 0; i < (int)esignlen; i++)
10101 *p++ = esignbuf[i];
10103 if (gap && !left) {
10104 memset(p, fill, gap);
10107 if (esignlen && fill != '0') {
10108 for (i = 0; i < (int)esignlen; i++)
10109 *p++ = esignbuf[i];
10112 for (i = zeros; i; i--)
10116 Copy(eptr, p, elen, char);
10120 memset(p, ' ', gap);
10125 Copy(dotstr, p, dotstrlen, char);
10129 vectorize = FALSE; /* done iterating over vecstr */
10136 SvCUR(sv) = p - SvPVX(sv);
10144 /* =========================================================================
10146 =head1 Cloning an interpreter
10148 All the macros and functions in this section are for the private use of
10149 the main function, perl_clone().
10151 The foo_dup() functions make an exact copy of an existing foo thinngy.
10152 During the course of a cloning, a hash table is used to map old addresses
10153 to new addresses. The table is created and manipulated with the
10154 ptr_table_* functions.
10158 ============================================================================*/
10161 #if defined(USE_ITHREADS)
10163 #ifndef GpREFCNT_inc
10164 # define GpREFCNT_inc(gp) ((gp) ? (++(gp)->gp_refcnt, (gp)) : (GP*)NULL)
10168 #define sv_dup_inc(s,t) SvREFCNT_inc(sv_dup(s,t))
10169 #define av_dup(s,t) (AV*)sv_dup((SV*)s,t)
10170 #define av_dup_inc(s,t) (AV*)SvREFCNT_inc(sv_dup((SV*)s,t))
10171 #define hv_dup(s,t) (HV*)sv_dup((SV*)s,t)
10172 #define hv_dup_inc(s,t) (HV*)SvREFCNT_inc(sv_dup((SV*)s,t))
10173 #define cv_dup(s,t) (CV*)sv_dup((SV*)s,t)
10174 #define cv_dup_inc(s,t) (CV*)SvREFCNT_inc(sv_dup((SV*)s,t))
10175 #define io_dup(s,t) (IO*)sv_dup((SV*)s,t)
10176 #define io_dup_inc(s,t) (IO*)SvREFCNT_inc(sv_dup((SV*)s,t))
10177 #define gv_dup(s,t) (GV*)sv_dup((SV*)s,t)
10178 #define gv_dup_inc(s,t) (GV*)SvREFCNT_inc(sv_dup((SV*)s,t))
10179 #define SAVEPV(p) (p ? savepv(p) : Nullch)
10180 #define SAVEPVN(p,n) (p ? savepvn(p,n) : Nullch)
10183 /* Duplicate a regexp. Required reading: pregcomp() and pregfree() in
10184 regcomp.c. AMS 20010712 */
10187 Perl_re_dup(pTHX_ REGEXP *r, CLONE_PARAMS *param)
10191 struct reg_substr_datum *s;
10194 return (REGEXP *)NULL;
10196 if ((ret = (REGEXP *)ptr_table_fetch(PL_ptr_table, r)))
10199 len = r->offsets[0];
10200 npar = r->nparens+1;
10202 Newc(0, ret, sizeof(regexp) + (len+1)*sizeof(regnode), char, regexp);
10203 Copy(r->program, ret->program, len+1, regnode);
10205 New(0, ret->startp, npar, I32);
10206 Copy(r->startp, ret->startp, npar, I32);
10207 New(0, ret->endp, npar, I32);
10208 Copy(r->startp, ret->startp, npar, I32);
10210 New(0, ret->substrs, 1, struct reg_substr_data);
10211 for (s = ret->substrs->data, i = 0; i < 3; i++, s++) {
10212 s->min_offset = r->substrs->data[i].min_offset;
10213 s->max_offset = r->substrs->data[i].max_offset;
10214 s->substr = sv_dup_inc(r->substrs->data[i].substr, param);
10215 s->utf8_substr = sv_dup_inc(r->substrs->data[i].utf8_substr, param);
10218 ret->regstclass = NULL;
10220 struct reg_data *d;
10221 int count = r->data->count;
10223 Newc(0, d, sizeof(struct reg_data) + count*sizeof(void *),
10224 char, struct reg_data);
10225 New(0, d->what, count, U8);
10228 for (i = 0; i < count; i++) {
10229 d->what[i] = r->data->what[i];
10230 switch (d->what[i]) {
10232 d->data[i] = sv_dup_inc((SV *)r->data->data[i], param);
10235 d->data[i] = av_dup_inc((AV *)r->data->data[i], param);
10238 /* This is cheating. */
10239 New(0, d->data[i], 1, struct regnode_charclass_class);
10240 StructCopy(r->data->data[i], d->data[i],
10241 struct regnode_charclass_class);
10242 ret->regstclass = (regnode*)d->data[i];
10245 /* Compiled op trees are readonly, and can thus be
10246 shared without duplication. */
10248 d->data[i] = (void*)OpREFCNT_inc((OP*)r->data->data[i]);
10252 d->data[i] = r->data->data[i];
10262 New(0, ret->offsets, 2*len+1, U32);
10263 Copy(r->offsets, ret->offsets, 2*len+1, U32);
10265 ret->precomp = SAVEPVN(r->precomp, r->prelen);
10266 ret->refcnt = r->refcnt;
10267 ret->minlen = r->minlen;
10268 ret->prelen = r->prelen;
10269 ret->nparens = r->nparens;
10270 ret->lastparen = r->lastparen;
10271 ret->lastcloseparen = r->lastcloseparen;
10272 ret->reganch = r->reganch;
10274 ret->sublen = r->sublen;
10276 if (RX_MATCH_COPIED(ret))
10277 ret->subbeg = SAVEPVN(r->subbeg, r->sublen);
10279 ret->subbeg = Nullch;
10280 #ifdef PERL_COPY_ON_WRITE
10281 ret->saved_copy = Nullsv;
10284 ptr_table_store(PL_ptr_table, r, ret);
10288 /* duplicate a file handle */
10291 Perl_fp_dup(pTHX_ PerlIO *fp, char type, CLONE_PARAMS *param)
10295 return (PerlIO*)NULL;
10297 /* look for it in the table first */
10298 ret = (PerlIO*)ptr_table_fetch(PL_ptr_table, fp);
10302 /* create anew and remember what it is */
10303 ret = PerlIO_fdupopen(aTHX_ fp, param, PERLIO_DUP_CLONE);
10304 ptr_table_store(PL_ptr_table, fp, ret);
10308 /* duplicate a directory handle */
10311 Perl_dirp_dup(pTHX_ DIR *dp)
10319 /* duplicate a typeglob */
10322 Perl_gp_dup(pTHX_ GP *gp, CLONE_PARAMS* param)
10327 /* look for it in the table first */
10328 ret = (GP*)ptr_table_fetch(PL_ptr_table, gp);
10332 /* create anew and remember what it is */
10333 Newz(0, ret, 1, GP);
10334 ptr_table_store(PL_ptr_table, gp, ret);
10337 ret->gp_refcnt = 0; /* must be before any other dups! */
10338 ret->gp_sv = sv_dup_inc(gp->gp_sv, param);
10339 ret->gp_io = io_dup_inc(gp->gp_io, param);
10340 ret->gp_form = cv_dup_inc(gp->gp_form, param);
10341 ret->gp_av = av_dup_inc(gp->gp_av, param);
10342 ret->gp_hv = hv_dup_inc(gp->gp_hv, param);
10343 ret->gp_egv = gv_dup(gp->gp_egv, param);/* GvEGV is not refcounted */
10344 ret->gp_cv = cv_dup_inc(gp->gp_cv, param);
10345 ret->gp_cvgen = gp->gp_cvgen;
10346 ret->gp_flags = gp->gp_flags;
10347 ret->gp_line = gp->gp_line;
10348 ret->gp_file = gp->gp_file; /* points to COP.cop_file */
10352 /* duplicate a chain of magic */
10355 Perl_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS* param)
10357 MAGIC *mgprev = (MAGIC*)NULL;
10360 return (MAGIC*)NULL;
10361 /* look for it in the table first */
10362 mgret = (MAGIC*)ptr_table_fetch(PL_ptr_table, mg);
10366 for (; mg; mg = mg->mg_moremagic) {
10368 Newz(0, nmg, 1, MAGIC);
10370 mgprev->mg_moremagic = nmg;
10373 nmg->mg_virtual = mg->mg_virtual; /* XXX copy dynamic vtable? */
10374 nmg->mg_private = mg->mg_private;
10375 nmg->mg_type = mg->mg_type;
10376 nmg->mg_flags = mg->mg_flags;
10377 if (mg->mg_type == PERL_MAGIC_qr) {
10378 nmg->mg_obj = (SV*)re_dup((REGEXP*)mg->mg_obj, param);
10380 else if(mg->mg_type == PERL_MAGIC_backref) {
10381 AV *av = (AV*) mg->mg_obj;
10384 SvREFCNT_inc(nmg->mg_obj = (SV*)newAV());
10386 for (i = AvFILLp(av); i >= 0; i--) {
10387 if (!svp[i]) continue;
10388 av_push((AV*)nmg->mg_obj,sv_dup(svp[i],param));
10392 nmg->mg_obj = (mg->mg_flags & MGf_REFCOUNTED)
10393 ? sv_dup_inc(mg->mg_obj, param)
10394 : sv_dup(mg->mg_obj, param);
10396 nmg->mg_len = mg->mg_len;
10397 nmg->mg_ptr = mg->mg_ptr; /* XXX random ptr? */
10398 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
10399 if (mg->mg_len > 0) {
10400 nmg->mg_ptr = SAVEPVN(mg->mg_ptr, mg->mg_len);
10401 if (mg->mg_type == PERL_MAGIC_overload_table &&
10402 AMT_AMAGIC((AMT*)mg->mg_ptr))
10404 AMT *amtp = (AMT*)mg->mg_ptr;
10405 AMT *namtp = (AMT*)nmg->mg_ptr;
10407 for (i = 1; i < NofAMmeth; i++) {
10408 namtp->table[i] = cv_dup_inc(amtp->table[i], param);
10412 else if (mg->mg_len == HEf_SVKEY)
10413 nmg->mg_ptr = (char*)sv_dup_inc((SV*)mg->mg_ptr, param);
10415 if ((mg->mg_flags & MGf_DUP) && mg->mg_virtual && mg->mg_virtual->svt_dup) {
10416 CALL_FPTR(nmg->mg_virtual->svt_dup)(aTHX_ nmg, param);
10423 /* create a new pointer-mapping table */
10426 Perl_ptr_table_new(pTHX)
10429 Newz(0, tbl, 1, PTR_TBL_t);
10430 tbl->tbl_max = 511;
10431 tbl->tbl_items = 0;
10432 Newz(0, tbl->tbl_ary, tbl->tbl_max + 1, PTR_TBL_ENT_t*);
10437 # define PTR_TABLE_HASH(ptr) (PTR2UV(ptr) >> 3)
10439 # define PTR_TABLE_HASH(ptr) (PTR2UV(ptr) >> 2)
10442 /* map an existing pointer using a table */
10445 Perl_ptr_table_fetch(pTHX_ PTR_TBL_t *tbl, void *sv)
10447 PTR_TBL_ENT_t *tblent;
10448 UV hash = PTR_TABLE_HASH(sv);
10450 tblent = tbl->tbl_ary[hash & tbl->tbl_max];
10451 for (; tblent; tblent = tblent->next) {
10452 if (tblent->oldval == sv)
10453 return tblent->newval;
10455 return (void*)NULL;
10458 /* add a new entry to a pointer-mapping table */
10461 Perl_ptr_table_store(pTHX_ PTR_TBL_t *tbl, void *oldv, void *newv)
10463 PTR_TBL_ENT_t *tblent, **otblent;
10464 /* XXX this may be pessimal on platforms where pointers aren't good
10465 * hash values e.g. if they grow faster in the most significant
10467 UV hash = PTR_TABLE_HASH(oldv);
10471 otblent = &tbl->tbl_ary[hash & tbl->tbl_max];
10472 for (tblent = *otblent; tblent; empty=0, tblent = tblent->next) {
10473 if (tblent->oldval == oldv) {
10474 tblent->newval = newv;
10478 Newz(0, tblent, 1, PTR_TBL_ENT_t);
10479 tblent->oldval = oldv;
10480 tblent->newval = newv;
10481 tblent->next = *otblent;
10484 if (!empty && tbl->tbl_items > tbl->tbl_max)
10485 ptr_table_split(tbl);
10488 /* double the hash bucket size of an existing ptr table */
10491 Perl_ptr_table_split(pTHX_ PTR_TBL_t *tbl)
10493 PTR_TBL_ENT_t **ary = tbl->tbl_ary;
10494 UV oldsize = tbl->tbl_max + 1;
10495 UV newsize = oldsize * 2;
10498 Renew(ary, newsize, PTR_TBL_ENT_t*);
10499 Zero(&ary[oldsize], newsize-oldsize, PTR_TBL_ENT_t*);
10500 tbl->tbl_max = --newsize;
10501 tbl->tbl_ary = ary;
10502 for (i=0; i < oldsize; i++, ary++) {
10503 PTR_TBL_ENT_t **curentp, **entp, *ent;
10506 curentp = ary + oldsize;
10507 for (entp = ary, ent = *ary; ent; ent = *entp) {
10508 if ((newsize & PTR_TABLE_HASH(ent->oldval)) != i) {
10510 ent->next = *curentp;
10520 /* remove all the entries from a ptr table */
10523 Perl_ptr_table_clear(pTHX_ PTR_TBL_t *tbl)
10525 register PTR_TBL_ENT_t **array;
10526 register PTR_TBL_ENT_t *entry;
10527 register PTR_TBL_ENT_t *oentry = Null(PTR_TBL_ENT_t*);
10531 if (!tbl || !tbl->tbl_items) {
10535 array = tbl->tbl_ary;
10537 max = tbl->tbl_max;
10542 entry = entry->next;
10546 if (++riter > max) {
10549 entry = array[riter];
10553 tbl->tbl_items = 0;
10556 /* clear and free a ptr table */
10559 Perl_ptr_table_free(pTHX_ PTR_TBL_t *tbl)
10564 ptr_table_clear(tbl);
10565 Safefree(tbl->tbl_ary);
10570 char *PL_watch_pvx;
10573 /* attempt to make everything in the typeglob readonly */
10576 S_gv_share(pTHX_ SV *sstr, CLONE_PARAMS *param)
10578 GV *gv = (GV*)sstr;
10579 SV *sv = ¶m->proto_perl->Isv_no; /* just need SvREADONLY-ness */
10581 if (GvIO(gv) || GvFORM(gv)) {
10582 GvUNIQUE_off(gv); /* GvIOs cannot be shared. nor can GvFORMs */
10584 else if (!GvCV(gv)) {
10585 GvCV(gv) = (CV*)sv;
10588 /* CvPADLISTs cannot be shared */
10589 if (!SvREADONLY(GvCV(gv)) && !CvXSUB(GvCV(gv))) {
10594 if (!GvUNIQUE(gv)) {
10596 PerlIO_printf(Perl_debug_log, "gv_share: unable to share %s::%s\n",
10597 HvNAME(GvSTASH(gv)), GvNAME(gv));
10603 * write attempts will die with
10604 * "Modification of a read-only value attempted"
10610 SvREADONLY_on(GvSV(gv));
10614 GvAV(gv) = (AV*)sv;
10617 SvREADONLY_on(GvAV(gv));
10621 GvHV(gv) = (HV*)sv;
10624 SvREADONLY_on(GvHV(gv));
10627 return sstr; /* he_dup() will SvREFCNT_inc() */
10630 /* duplicate an SV of any type (including AV, HV etc) */
10633 Perl_rvpv_dup(pTHX_ SV *dstr, SV *sstr, CLONE_PARAMS* param)
10636 SvRV(dstr) = SvWEAKREF(sstr)
10637 ? sv_dup(SvRV(sstr), param)
10638 : sv_dup_inc(SvRV(sstr), param);
10640 else if (SvPVX(sstr)) {
10641 /* Has something there */
10643 /* Normal PV - clone whole allocated space */
10644 SvPVX(dstr) = SAVEPVN(SvPVX(sstr), SvLEN(sstr)-1);
10645 if (SvREADONLY(sstr) && SvFAKE(sstr)) {
10646 /* Not that normal - actually sstr is copy on write.
10647 But we are a true, independant SV, so: */
10648 SvREADONLY_off(dstr);
10653 /* Special case - not normally malloced for some reason */
10654 if (SvREADONLY(sstr) && SvFAKE(sstr)) {
10655 /* A "shared" PV - clone it as unshared string */
10656 if(SvPADTMP(sstr)) {
10657 /* However, some of them live in the pad
10658 and they should not have these flags
10661 SvPVX(dstr) = sharepvn(SvPVX(sstr), SvCUR(sstr),
10663 SvUVX(dstr) = SvUVX(sstr);
10666 SvPVX(dstr) = SAVEPVN(SvPVX(sstr), SvCUR(sstr));
10668 SvREADONLY_off(dstr);
10672 /* Some other special case - random pointer */
10673 SvPVX(dstr) = SvPVX(sstr);
10678 /* Copy the Null */
10679 SvPVX(dstr) = SvPVX(sstr);
10684 Perl_sv_dup(pTHX_ SV *sstr, CLONE_PARAMS* param)
10688 if (!sstr || SvTYPE(sstr) == SVTYPEMASK)
10690 /* look for it in the table first */
10691 dstr = (SV*)ptr_table_fetch(PL_ptr_table, sstr);
10695 if(param->flags & CLONEf_JOIN_IN) {
10696 /** We are joining here so we don't want do clone
10697 something that is bad **/
10699 if(SvTYPE(sstr) == SVt_PVHV &&
10701 /** don't clone stashes if they already exist **/
10702 HV* old_stash = gv_stashpv(HvNAME(sstr),0);
10703 return (SV*) old_stash;
10707 /* create anew and remember what it is */
10709 ptr_table_store(PL_ptr_table, sstr, dstr);
10712 SvFLAGS(dstr) = SvFLAGS(sstr);
10713 SvFLAGS(dstr) &= ~SVf_OOK; /* don't propagate OOK hack */
10714 SvREFCNT(dstr) = 0; /* must be before any other dups! */
10717 if (SvANY(sstr) && PL_watch_pvx && SvPVX(sstr) == PL_watch_pvx)
10718 PerlIO_printf(Perl_debug_log, "watch at %p hit, found string \"%s\"\n",
10719 PL_watch_pvx, SvPVX(sstr));
10722 switch (SvTYPE(sstr)) {
10724 SvANY(dstr) = NULL;
10727 SvANY(dstr) = new_XIV();
10728 SvIVX(dstr) = SvIVX(sstr);
10731 SvANY(dstr) = new_XNV();
10732 SvNVX(dstr) = SvNVX(sstr);
10735 SvANY(dstr) = new_XRV();
10736 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
10739 SvANY(dstr) = new_XPV();
10740 SvCUR(dstr) = SvCUR(sstr);
10741 SvLEN(dstr) = SvLEN(sstr);
10742 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
10745 SvANY(dstr) = new_XPVIV();
10746 SvCUR(dstr) = SvCUR(sstr);
10747 SvLEN(dstr) = SvLEN(sstr);
10748 SvIVX(dstr) = SvIVX(sstr);
10749 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
10752 SvANY(dstr) = new_XPVNV();
10753 SvCUR(dstr) = SvCUR(sstr);
10754 SvLEN(dstr) = SvLEN(sstr);
10755 SvIVX(dstr) = SvIVX(sstr);
10756 SvNVX(dstr) = SvNVX(sstr);
10757 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
10760 SvANY(dstr) = new_XPVMG();
10761 SvCUR(dstr) = SvCUR(sstr);
10762 SvLEN(dstr) = SvLEN(sstr);
10763 SvIVX(dstr) = SvIVX(sstr);
10764 SvNVX(dstr) = SvNVX(sstr);
10765 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
10766 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
10767 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
10770 SvANY(dstr) = new_XPVBM();
10771 SvCUR(dstr) = SvCUR(sstr);
10772 SvLEN(dstr) = SvLEN(sstr);
10773 SvIVX(dstr) = SvIVX(sstr);
10774 SvNVX(dstr) = SvNVX(sstr);
10775 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
10776 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
10777 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
10778 BmRARE(dstr) = BmRARE(sstr);
10779 BmUSEFUL(dstr) = BmUSEFUL(sstr);
10780 BmPREVIOUS(dstr)= BmPREVIOUS(sstr);
10783 SvANY(dstr) = new_XPVLV();
10784 SvCUR(dstr) = SvCUR(sstr);
10785 SvLEN(dstr) = SvLEN(sstr);
10786 SvIVX(dstr) = SvIVX(sstr);
10787 SvNVX(dstr) = SvNVX(sstr);
10788 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
10789 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
10790 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
10791 LvTARGOFF(dstr) = LvTARGOFF(sstr); /* XXX sometimes holds PMOP* when DEBUGGING */
10792 LvTARGLEN(dstr) = LvTARGLEN(sstr);
10793 if (LvTYPE(sstr) == 't') /* for tie: unrefcnted fake (SV**) */
10794 LvTARG(dstr) = dstr;
10795 else if (LvTYPE(sstr) == 'T') /* for tie: fake HE */
10796 LvTARG(dstr) = (SV*)he_dup((HE*)LvTARG(sstr), 0, param);
10798 LvTARG(dstr) = sv_dup_inc(LvTARG(sstr), param);
10799 LvTYPE(dstr) = LvTYPE(sstr);
10802 if (GvUNIQUE((GV*)sstr)) {
10804 if ((share = gv_share(sstr, param))) {
10807 ptr_table_store(PL_ptr_table, sstr, dstr);
10809 PerlIO_printf(Perl_debug_log, "sv_dup: sharing %s::%s\n",
10810 HvNAME(GvSTASH(share)), GvNAME(share));
10815 SvANY(dstr) = new_XPVGV();
10816 SvCUR(dstr) = SvCUR(sstr);
10817 SvLEN(dstr) = SvLEN(sstr);
10818 SvIVX(dstr) = SvIVX(sstr);
10819 SvNVX(dstr) = SvNVX(sstr);
10820 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
10821 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
10822 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
10823 GvNAMELEN(dstr) = GvNAMELEN(sstr);
10824 GvNAME(dstr) = SAVEPVN(GvNAME(sstr), GvNAMELEN(sstr));
10825 GvSTASH(dstr) = hv_dup_inc(GvSTASH(sstr), param);
10826 GvFLAGS(dstr) = GvFLAGS(sstr);
10827 GvGP(dstr) = gp_dup(GvGP(sstr), param);
10828 (void)GpREFCNT_inc(GvGP(dstr));
10831 SvANY(dstr) = new_XPVIO();
10832 SvCUR(dstr) = SvCUR(sstr);
10833 SvLEN(dstr) = SvLEN(sstr);
10834 SvIVX(dstr) = SvIVX(sstr);
10835 SvNVX(dstr) = SvNVX(sstr);
10836 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
10837 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
10838 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
10839 IoIFP(dstr) = fp_dup(IoIFP(sstr), IoTYPE(sstr), param);
10840 if (IoOFP(sstr) == IoIFP(sstr))
10841 IoOFP(dstr) = IoIFP(dstr);
10843 IoOFP(dstr) = fp_dup(IoOFP(sstr), IoTYPE(sstr), param);
10844 /* PL_rsfp_filters entries have fake IoDIRP() */
10845 if (IoDIRP(sstr) && !(IoFLAGS(sstr) & IOf_FAKE_DIRP))
10846 IoDIRP(dstr) = dirp_dup(IoDIRP(sstr));
10848 IoDIRP(dstr) = IoDIRP(sstr);
10849 IoLINES(dstr) = IoLINES(sstr);
10850 IoPAGE(dstr) = IoPAGE(sstr);
10851 IoPAGE_LEN(dstr) = IoPAGE_LEN(sstr);
10852 IoLINES_LEFT(dstr) = IoLINES_LEFT(sstr);
10853 if(IoFLAGS(sstr) & IOf_FAKE_DIRP) {
10854 /* I have no idea why fake dirp (rsfps)
10855 should be treaded differently but otherwise
10856 we end up with leaks -- sky*/
10857 IoTOP_GV(dstr) = gv_dup_inc(IoTOP_GV(sstr), param);
10858 IoFMT_GV(dstr) = gv_dup_inc(IoFMT_GV(sstr), param);
10859 IoBOTTOM_GV(dstr) = gv_dup_inc(IoBOTTOM_GV(sstr), param);
10861 IoTOP_GV(dstr) = gv_dup(IoTOP_GV(sstr), param);
10862 IoFMT_GV(dstr) = gv_dup(IoFMT_GV(sstr), param);
10863 IoBOTTOM_GV(dstr) = gv_dup(IoBOTTOM_GV(sstr), param);
10865 IoTOP_NAME(dstr) = SAVEPV(IoTOP_NAME(sstr));
10866 IoFMT_NAME(dstr) = SAVEPV(IoFMT_NAME(sstr));
10867 IoBOTTOM_NAME(dstr) = SAVEPV(IoBOTTOM_NAME(sstr));
10868 IoSUBPROCESS(dstr) = IoSUBPROCESS(sstr);
10869 IoTYPE(dstr) = IoTYPE(sstr);
10870 IoFLAGS(dstr) = IoFLAGS(sstr);
10873 SvANY(dstr) = new_XPVAV();
10874 SvCUR(dstr) = SvCUR(sstr);
10875 SvLEN(dstr) = SvLEN(sstr);
10876 SvIVX(dstr) = SvIVX(sstr);
10877 SvNVX(dstr) = SvNVX(sstr);
10878 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
10879 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
10880 AvARYLEN((AV*)dstr) = sv_dup_inc(AvARYLEN((AV*)sstr), param);
10881 AvFLAGS((AV*)dstr) = AvFLAGS((AV*)sstr);
10882 if (AvARRAY((AV*)sstr)) {
10883 SV **dst_ary, **src_ary;
10884 SSize_t items = AvFILLp((AV*)sstr) + 1;
10886 src_ary = AvARRAY((AV*)sstr);
10887 Newz(0, dst_ary, AvMAX((AV*)sstr)+1, SV*);
10888 ptr_table_store(PL_ptr_table, src_ary, dst_ary);
10889 SvPVX(dstr) = (char*)dst_ary;
10890 AvALLOC((AV*)dstr) = dst_ary;
10891 if (AvREAL((AV*)sstr)) {
10892 while (items-- > 0)
10893 *dst_ary++ = sv_dup_inc(*src_ary++, param);
10896 while (items-- > 0)
10897 *dst_ary++ = sv_dup(*src_ary++, param);
10899 items = AvMAX((AV*)sstr) - AvFILLp((AV*)sstr);
10900 while (items-- > 0) {
10901 *dst_ary++ = &PL_sv_undef;
10905 SvPVX(dstr) = Nullch;
10906 AvALLOC((AV*)dstr) = (SV**)NULL;
10910 SvANY(dstr) = new_XPVHV();
10911 SvCUR(dstr) = SvCUR(sstr);
10912 SvLEN(dstr) = SvLEN(sstr);
10913 SvIVX(dstr) = SvIVX(sstr);
10914 SvNVX(dstr) = SvNVX(sstr);
10915 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
10916 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
10917 HvRITER((HV*)dstr) = HvRITER((HV*)sstr);
10918 if (HvARRAY((HV*)sstr)) {
10920 XPVHV *dxhv = (XPVHV*)SvANY(dstr);
10921 XPVHV *sxhv = (XPVHV*)SvANY(sstr);
10922 Newz(0, dxhv->xhv_array,
10923 PERL_HV_ARRAY_ALLOC_BYTES(dxhv->xhv_max+1), char);
10924 while (i <= sxhv->xhv_max) {
10925 ((HE**)dxhv->xhv_array)[i] = he_dup(((HE**)sxhv->xhv_array)[i],
10926 (bool)!!HvSHAREKEYS(sstr),
10930 dxhv->xhv_eiter = he_dup(sxhv->xhv_eiter,
10931 (bool)!!HvSHAREKEYS(sstr), param);
10934 SvPVX(dstr) = Nullch;
10935 HvEITER((HV*)dstr) = (HE*)NULL;
10937 HvPMROOT((HV*)dstr) = HvPMROOT((HV*)sstr); /* XXX */
10938 HvNAME((HV*)dstr) = SAVEPV(HvNAME((HV*)sstr));
10939 /* Record stashes for possible cloning in Perl_clone(). */
10940 if(HvNAME((HV*)dstr))
10941 av_push(param->stashes, dstr);
10944 SvANY(dstr) = new_XPVFM();
10945 FmLINES(dstr) = FmLINES(sstr);
10949 SvANY(dstr) = new_XPVCV();
10951 SvCUR(dstr) = SvCUR(sstr);
10952 SvLEN(dstr) = SvLEN(sstr);
10953 SvIVX(dstr) = SvIVX(sstr);
10954 SvNVX(dstr) = SvNVX(sstr);
10955 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
10956 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
10957 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
10958 CvSTASH(dstr) = hv_dup(CvSTASH(sstr), param); /* NOTE: not refcounted */
10959 CvSTART(dstr) = CvSTART(sstr);
10961 CvROOT(dstr) = OpREFCNT_inc(CvROOT(sstr));
10963 CvXSUB(dstr) = CvXSUB(sstr);
10964 CvXSUBANY(dstr) = CvXSUBANY(sstr);
10965 if (CvCONST(sstr)) {
10966 CvXSUBANY(dstr).any_ptr = GvUNIQUE(CvGV(sstr)) ?
10967 SvREFCNT_inc(CvXSUBANY(sstr).any_ptr) :
10968 sv_dup_inc(CvXSUBANY(sstr).any_ptr, param);
10970 /* don't dup if copying back - CvGV isn't refcounted, so the
10971 * duped GV may never be freed. A bit of a hack! DAPM */
10972 CvGV(dstr) = (param->flags & CLONEf_JOIN_IN) ?
10973 Nullgv : gv_dup(CvGV(sstr), param) ;
10974 if (param->flags & CLONEf_COPY_STACKS) {
10975 CvDEPTH(dstr) = CvDEPTH(sstr);
10979 PAD_DUP(CvPADLIST(dstr), CvPADLIST(sstr), param);
10980 CvOUTSIDE_SEQ(dstr) = CvOUTSIDE_SEQ(sstr);
10982 CvWEAKOUTSIDE(sstr)
10983 ? cv_dup( CvOUTSIDE(sstr), param)
10984 : cv_dup_inc(CvOUTSIDE(sstr), param);
10985 CvFLAGS(dstr) = CvFLAGS(sstr);
10986 CvFILE(dstr) = CvXSUB(sstr) ? CvFILE(sstr) : SAVEPV(CvFILE(sstr));
10989 Perl_croak(aTHX_ "Bizarre SvTYPE [%" IVdf "]", (IV)SvTYPE(sstr));
10993 if (SvOBJECT(dstr) && SvTYPE(dstr) != SVt_PVIO)
10999 /* duplicate a context */
11002 Perl_cx_dup(pTHX_ PERL_CONTEXT *cxs, I32 ix, I32 max, CLONE_PARAMS* param)
11004 PERL_CONTEXT *ncxs;
11007 return (PERL_CONTEXT*)NULL;
11009 /* look for it in the table first */
11010 ncxs = (PERL_CONTEXT*)ptr_table_fetch(PL_ptr_table, cxs);
11014 /* create anew and remember what it is */
11015 Newz(56, ncxs, max + 1, PERL_CONTEXT);
11016 ptr_table_store(PL_ptr_table, cxs, ncxs);
11019 PERL_CONTEXT *cx = &cxs[ix];
11020 PERL_CONTEXT *ncx = &ncxs[ix];
11021 ncx->cx_type = cx->cx_type;
11022 if (CxTYPE(cx) == CXt_SUBST) {
11023 Perl_croak(aTHX_ "Cloning substitution context is unimplemented");
11026 ncx->blk_oldsp = cx->blk_oldsp;
11027 ncx->blk_oldcop = cx->blk_oldcop;
11028 ncx->blk_oldmarksp = cx->blk_oldmarksp;
11029 ncx->blk_oldscopesp = cx->blk_oldscopesp;
11030 ncx->blk_oldpm = cx->blk_oldpm;
11031 ncx->blk_gimme = cx->blk_gimme;
11032 switch (CxTYPE(cx)) {
11034 ncx->blk_sub.cv = (cx->blk_sub.olddepth == 0
11035 ? cv_dup_inc(cx->blk_sub.cv, param)
11036 : cv_dup(cx->blk_sub.cv,param));
11037 ncx->blk_sub.argarray = (cx->blk_sub.hasargs
11038 ? av_dup_inc(cx->blk_sub.argarray, param)
11040 ncx->blk_sub.savearray = av_dup_inc(cx->blk_sub.savearray, param);
11041 ncx->blk_sub.olddepth = cx->blk_sub.olddepth;
11042 ncx->blk_sub.hasargs = cx->blk_sub.hasargs;
11043 ncx->blk_sub.lval = cx->blk_sub.lval;
11044 ncx->blk_sub.retop = cx->blk_sub.retop;
11047 ncx->blk_eval.old_in_eval = cx->blk_eval.old_in_eval;
11048 ncx->blk_eval.old_op_type = cx->blk_eval.old_op_type;
11049 ncx->blk_eval.old_namesv = sv_dup_inc(cx->blk_eval.old_namesv, param);
11050 ncx->blk_eval.old_eval_root = cx->blk_eval.old_eval_root;
11051 ncx->blk_eval.cur_text = sv_dup(cx->blk_eval.cur_text, param);
11052 ncx->blk_eval.retop = cx->blk_eval.retop;
11055 ncx->blk_loop.label = cx->blk_loop.label;
11056 ncx->blk_loop.resetsp = cx->blk_loop.resetsp;
11057 ncx->blk_loop.redo_op = cx->blk_loop.redo_op;
11058 ncx->blk_loop.next_op = cx->blk_loop.next_op;
11059 ncx->blk_loop.last_op = cx->blk_loop.last_op;
11060 ncx->blk_loop.iterdata = (CxPADLOOP(cx)
11061 ? cx->blk_loop.iterdata
11062 : gv_dup((GV*)cx->blk_loop.iterdata, param));
11063 ncx->blk_loop.oldcomppad
11064 = (PAD*)ptr_table_fetch(PL_ptr_table,
11065 cx->blk_loop.oldcomppad);
11066 ncx->blk_loop.itersave = sv_dup_inc(cx->blk_loop.itersave, param);
11067 ncx->blk_loop.iterlval = sv_dup_inc(cx->blk_loop.iterlval, param);
11068 ncx->blk_loop.iterary = av_dup_inc(cx->blk_loop.iterary, param);
11069 ncx->blk_loop.iterix = cx->blk_loop.iterix;
11070 ncx->blk_loop.itermax = cx->blk_loop.itermax;
11073 ncx->blk_sub.cv = cv_dup(cx->blk_sub.cv, param);
11074 ncx->blk_sub.gv = gv_dup(cx->blk_sub.gv, param);
11075 ncx->blk_sub.dfoutgv = gv_dup_inc(cx->blk_sub.dfoutgv, param);
11076 ncx->blk_sub.hasargs = cx->blk_sub.hasargs;
11077 ncx->blk_sub.retop = cx->blk_sub.retop;
11089 /* duplicate a stack info structure */
11092 Perl_si_dup(pTHX_ PERL_SI *si, CLONE_PARAMS* param)
11097 return (PERL_SI*)NULL;
11099 /* look for it in the table first */
11100 nsi = (PERL_SI*)ptr_table_fetch(PL_ptr_table, si);
11104 /* create anew and remember what it is */
11105 Newz(56, nsi, 1, PERL_SI);
11106 ptr_table_store(PL_ptr_table, si, nsi);
11108 nsi->si_stack = av_dup_inc(si->si_stack, param);
11109 nsi->si_cxix = si->si_cxix;
11110 nsi->si_cxmax = si->si_cxmax;
11111 nsi->si_cxstack = cx_dup(si->si_cxstack, si->si_cxix, si->si_cxmax, param);
11112 nsi->si_type = si->si_type;
11113 nsi->si_prev = si_dup(si->si_prev, param);
11114 nsi->si_next = si_dup(si->si_next, param);
11115 nsi->si_markoff = si->si_markoff;
11120 #define POPINT(ss,ix) ((ss)[--(ix)].any_i32)
11121 #define TOPINT(ss,ix) ((ss)[ix].any_i32)
11122 #define POPLONG(ss,ix) ((ss)[--(ix)].any_long)
11123 #define TOPLONG(ss,ix) ((ss)[ix].any_long)
11124 #define POPIV(ss,ix) ((ss)[--(ix)].any_iv)
11125 #define TOPIV(ss,ix) ((ss)[ix].any_iv)
11126 #define POPBOOL(ss,ix) ((ss)[--(ix)].any_bool)
11127 #define TOPBOOL(ss,ix) ((ss)[ix].any_bool)
11128 #define POPPTR(ss,ix) ((ss)[--(ix)].any_ptr)
11129 #define TOPPTR(ss,ix) ((ss)[ix].any_ptr)
11130 #define POPDPTR(ss,ix) ((ss)[--(ix)].any_dptr)
11131 #define TOPDPTR(ss,ix) ((ss)[ix].any_dptr)
11132 #define POPDXPTR(ss,ix) ((ss)[--(ix)].any_dxptr)
11133 #define TOPDXPTR(ss,ix) ((ss)[ix].any_dxptr)
11136 #define pv_dup_inc(p) SAVEPV(p)
11137 #define pv_dup(p) SAVEPV(p)
11138 #define svp_dup_inc(p,pp) any_dup(p,pp)
11140 /* map any object to the new equivent - either something in the
11141 * ptr table, or something in the interpreter structure
11145 Perl_any_dup(pTHX_ void *v, PerlInterpreter *proto_perl)
11150 return (void*)NULL;
11152 /* look for it in the table first */
11153 ret = ptr_table_fetch(PL_ptr_table, v);
11157 /* see if it is part of the interpreter structure */
11158 if (v >= (void*)proto_perl && v < (void*)(proto_perl+1))
11159 ret = (void*)(((char*)aTHX) + (((char*)v) - (char*)proto_perl));
11167 /* duplicate the save stack */
11170 Perl_ss_dup(pTHX_ PerlInterpreter *proto_perl, CLONE_PARAMS* param)
11172 ANY *ss = proto_perl->Tsavestack;
11173 I32 ix = proto_perl->Tsavestack_ix;
11174 I32 max = proto_perl->Tsavestack_max;
11187 void (*dptr) (void*);
11188 void (*dxptr) (pTHX_ void*);
11191 Newz(54, nss, max, ANY);
11195 TOPINT(nss,ix) = i;
11197 case SAVEt_ITEM: /* normal string */
11198 sv = (SV*)POPPTR(ss,ix);
11199 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
11200 sv = (SV*)POPPTR(ss,ix);
11201 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
11203 case SAVEt_SV: /* scalar reference */
11204 sv = (SV*)POPPTR(ss,ix);
11205 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
11206 gv = (GV*)POPPTR(ss,ix);
11207 TOPPTR(nss,ix) = gv_dup_inc(gv, param);
11209 case SAVEt_GENERIC_PVREF: /* generic char* */
11210 c = (char*)POPPTR(ss,ix);
11211 TOPPTR(nss,ix) = pv_dup(c);
11212 ptr = POPPTR(ss,ix);
11213 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11215 case SAVEt_SHARED_PVREF: /* char* in shared space */
11216 c = (char*)POPPTR(ss,ix);
11217 TOPPTR(nss,ix) = savesharedpv(c);
11218 ptr = POPPTR(ss,ix);
11219 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11221 case SAVEt_GENERIC_SVREF: /* generic sv */
11222 case SAVEt_SVREF: /* scalar reference */
11223 sv = (SV*)POPPTR(ss,ix);
11224 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
11225 ptr = POPPTR(ss,ix);
11226 TOPPTR(nss,ix) = svp_dup_inc((SV**)ptr, proto_perl);/* XXXXX */
11228 case SAVEt_AV: /* array reference */
11229 av = (AV*)POPPTR(ss,ix);
11230 TOPPTR(nss,ix) = av_dup_inc(av, param);
11231 gv = (GV*)POPPTR(ss,ix);
11232 TOPPTR(nss,ix) = gv_dup(gv, param);
11234 case SAVEt_HV: /* hash reference */
11235 hv = (HV*)POPPTR(ss,ix);
11236 TOPPTR(nss,ix) = hv_dup_inc(hv, param);
11237 gv = (GV*)POPPTR(ss,ix);
11238 TOPPTR(nss,ix) = gv_dup(gv, param);
11240 case SAVEt_INT: /* int reference */
11241 ptr = POPPTR(ss,ix);
11242 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11243 intval = (int)POPINT(ss,ix);
11244 TOPINT(nss,ix) = intval;
11246 case SAVEt_LONG: /* long reference */
11247 ptr = POPPTR(ss,ix);
11248 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11249 longval = (long)POPLONG(ss,ix);
11250 TOPLONG(nss,ix) = longval;
11252 case SAVEt_I32: /* I32 reference */
11253 case SAVEt_I16: /* I16 reference */
11254 case SAVEt_I8: /* I8 reference */
11255 ptr = POPPTR(ss,ix);
11256 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11258 TOPINT(nss,ix) = i;
11260 case SAVEt_IV: /* IV reference */
11261 ptr = POPPTR(ss,ix);
11262 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11264 TOPIV(nss,ix) = iv;
11266 case SAVEt_SPTR: /* SV* reference */
11267 ptr = POPPTR(ss,ix);
11268 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11269 sv = (SV*)POPPTR(ss,ix);
11270 TOPPTR(nss,ix) = sv_dup(sv, param);
11272 case SAVEt_VPTR: /* random* reference */
11273 ptr = POPPTR(ss,ix);
11274 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11275 ptr = POPPTR(ss,ix);
11276 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11278 case SAVEt_PPTR: /* char* reference */
11279 ptr = POPPTR(ss,ix);
11280 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11281 c = (char*)POPPTR(ss,ix);
11282 TOPPTR(nss,ix) = pv_dup(c);
11284 case SAVEt_HPTR: /* HV* reference */
11285 ptr = POPPTR(ss,ix);
11286 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11287 hv = (HV*)POPPTR(ss,ix);
11288 TOPPTR(nss,ix) = hv_dup(hv, param);
11290 case SAVEt_APTR: /* AV* reference */
11291 ptr = POPPTR(ss,ix);
11292 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11293 av = (AV*)POPPTR(ss,ix);
11294 TOPPTR(nss,ix) = av_dup(av, param);
11297 gv = (GV*)POPPTR(ss,ix);
11298 TOPPTR(nss,ix) = gv_dup(gv, param);
11300 case SAVEt_GP: /* scalar reference */
11301 gp = (GP*)POPPTR(ss,ix);
11302 TOPPTR(nss,ix) = gp = gp_dup(gp, param);
11303 (void)GpREFCNT_inc(gp);
11304 gv = (GV*)POPPTR(ss,ix);
11305 TOPPTR(nss,ix) = gv_dup_inc(gv, param);
11306 c = (char*)POPPTR(ss,ix);
11307 TOPPTR(nss,ix) = pv_dup(c);
11309 TOPIV(nss,ix) = iv;
11311 TOPIV(nss,ix) = iv;
11314 case SAVEt_MORTALIZESV:
11315 sv = (SV*)POPPTR(ss,ix);
11316 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
11319 ptr = POPPTR(ss,ix);
11320 if (ptr && (((OP*)ptr)->op_private & OPpREFCOUNTED)) {
11321 /* these are assumed to be refcounted properly */
11322 switch (((OP*)ptr)->op_type) {
11324 case OP_LEAVESUBLV:
11328 case OP_LEAVEWRITE:
11329 TOPPTR(nss,ix) = ptr;
11334 TOPPTR(nss,ix) = Nullop;
11339 TOPPTR(nss,ix) = Nullop;
11342 c = (char*)POPPTR(ss,ix);
11343 TOPPTR(nss,ix) = pv_dup_inc(c);
11345 case SAVEt_CLEARSV:
11346 longval = POPLONG(ss,ix);
11347 TOPLONG(nss,ix) = longval;
11350 hv = (HV*)POPPTR(ss,ix);
11351 TOPPTR(nss,ix) = hv_dup_inc(hv, param);
11352 c = (char*)POPPTR(ss,ix);
11353 TOPPTR(nss,ix) = pv_dup_inc(c);
11355 TOPINT(nss,ix) = i;
11357 case SAVEt_DESTRUCTOR:
11358 ptr = POPPTR(ss,ix);
11359 TOPPTR(nss,ix) = any_dup(ptr, proto_perl); /* XXX quite arbitrary */
11360 dptr = POPDPTR(ss,ix);
11361 TOPDPTR(nss,ix) = (void (*)(void*))any_dup((void *)dptr, proto_perl);
11363 case SAVEt_DESTRUCTOR_X:
11364 ptr = POPPTR(ss,ix);
11365 TOPPTR(nss,ix) = any_dup(ptr, proto_perl); /* XXX quite arbitrary */
11366 dxptr = POPDXPTR(ss,ix);
11367 TOPDXPTR(nss,ix) = (void (*)(pTHX_ void*))any_dup((void *)dxptr, proto_perl);
11369 case SAVEt_REGCONTEXT:
11372 TOPINT(nss,ix) = i;
11375 case SAVEt_STACK_POS: /* Position on Perl stack */
11377 TOPINT(nss,ix) = i;
11379 case SAVEt_AELEM: /* array element */
11380 sv = (SV*)POPPTR(ss,ix);
11381 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
11383 TOPINT(nss,ix) = i;
11384 av = (AV*)POPPTR(ss,ix);
11385 TOPPTR(nss,ix) = av_dup_inc(av, param);
11387 case SAVEt_HELEM: /* hash element */
11388 sv = (SV*)POPPTR(ss,ix);
11389 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
11390 sv = (SV*)POPPTR(ss,ix);
11391 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
11392 hv = (HV*)POPPTR(ss,ix);
11393 TOPPTR(nss,ix) = hv_dup_inc(hv, param);
11396 ptr = POPPTR(ss,ix);
11397 TOPPTR(nss,ix) = ptr;
11401 TOPINT(nss,ix) = i;
11403 case SAVEt_COMPPAD:
11404 av = (AV*)POPPTR(ss,ix);
11405 TOPPTR(nss,ix) = av_dup(av, param);
11408 longval = (long)POPLONG(ss,ix);
11409 TOPLONG(nss,ix) = longval;
11410 ptr = POPPTR(ss,ix);
11411 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11412 sv = (SV*)POPPTR(ss,ix);
11413 TOPPTR(nss,ix) = sv_dup(sv, param);
11416 ptr = POPPTR(ss,ix);
11417 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11418 longval = (long)POPBOOL(ss,ix);
11419 TOPBOOL(nss,ix) = (bool)longval;
11421 case SAVEt_SET_SVFLAGS:
11423 TOPINT(nss,ix) = i;
11425 TOPINT(nss,ix) = i;
11426 sv = (SV*)POPPTR(ss,ix);
11427 TOPPTR(nss,ix) = sv_dup(sv, param);
11430 Perl_croak(aTHX_ "panic: ss_dup inconsistency");
11438 =for apidoc perl_clone
11440 Create and return a new interpreter by cloning the current one.
11442 perl_clone takes these flags as parameters:
11444 CLONEf_COPY_STACKS - is used to, well, copy the stacks also,
11445 without it we only clone the data and zero the stacks,
11446 with it we copy the stacks and the new perl interpreter is
11447 ready to run at the exact same point as the previous one.
11448 The pseudo-fork code uses COPY_STACKS while the
11449 threads->new doesn't.
11451 CLONEf_KEEP_PTR_TABLE
11452 perl_clone keeps a ptr_table with the pointer of the old
11453 variable as a key and the new variable as a value,
11454 this allows it to check if something has been cloned and not
11455 clone it again but rather just use the value and increase the
11456 refcount. If KEEP_PTR_TABLE is not set then perl_clone will kill
11457 the ptr_table using the function
11458 C<ptr_table_free(PL_ptr_table); PL_ptr_table = NULL;>,
11459 reason to keep it around is if you want to dup some of your own
11460 variable who are outside the graph perl scans, example of this
11461 code is in threads.xs create
11464 This is a win32 thing, it is ignored on unix, it tells perls
11465 win32host code (which is c++) to clone itself, this is needed on
11466 win32 if you want to run two threads at the same time,
11467 if you just want to do some stuff in a separate perl interpreter
11468 and then throw it away and return to the original one,
11469 you don't need to do anything.
11474 /* XXX the above needs expanding by someone who actually understands it ! */
11475 EXTERN_C PerlInterpreter *
11476 perl_clone_host(PerlInterpreter* proto_perl, UV flags);
11479 perl_clone(PerlInterpreter *proto_perl, UV flags)
11481 #ifdef PERL_IMPLICIT_SYS
11483 /* perlhost.h so we need to call into it
11484 to clone the host, CPerlHost should have a c interface, sky */
11486 if (flags & CLONEf_CLONE_HOST) {
11487 return perl_clone_host(proto_perl,flags);
11489 return perl_clone_using(proto_perl, flags,
11491 proto_perl->IMemShared,
11492 proto_perl->IMemParse,
11494 proto_perl->IStdIO,
11498 proto_perl->IProc);
11502 perl_clone_using(PerlInterpreter *proto_perl, UV flags,
11503 struct IPerlMem* ipM, struct IPerlMem* ipMS,
11504 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
11505 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
11506 struct IPerlDir* ipD, struct IPerlSock* ipS,
11507 struct IPerlProc* ipP)
11509 /* XXX many of the string copies here can be optimized if they're
11510 * constants; they need to be allocated as common memory and just
11511 * their pointers copied. */
11514 CLONE_PARAMS clone_params;
11515 CLONE_PARAMS* param = &clone_params;
11517 PerlInterpreter *my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
11518 PERL_SET_THX(my_perl);
11521 Poison(my_perl, 1, PerlInterpreter);
11525 PL_savestack_ix = 0;
11526 PL_savestack_max = -1;
11527 PL_sig_pending = 0;
11528 Zero(&PL_debug_pad, 1, struct perl_debug_pad);
11529 # else /* !DEBUGGING */
11530 Zero(my_perl, 1, PerlInterpreter);
11531 # endif /* DEBUGGING */
11533 /* host pointers */
11535 PL_MemShared = ipMS;
11536 PL_MemParse = ipMP;
11543 #else /* !PERL_IMPLICIT_SYS */
11545 CLONE_PARAMS clone_params;
11546 CLONE_PARAMS* param = &clone_params;
11547 PerlInterpreter *my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
11548 PERL_SET_THX(my_perl);
11553 Poison(my_perl, 1, PerlInterpreter);
11557 PL_savestack_ix = 0;
11558 PL_savestack_max = -1;
11559 PL_sig_pending = 0;
11560 Zero(&PL_debug_pad, 1, struct perl_debug_pad);
11561 # else /* !DEBUGGING */
11562 Zero(my_perl, 1, PerlInterpreter);
11563 # endif /* DEBUGGING */
11564 #endif /* PERL_IMPLICIT_SYS */
11565 param->flags = flags;
11566 param->proto_perl = proto_perl;
11569 PL_xiv_arenaroot = NULL;
11570 PL_xiv_root = NULL;
11571 PL_xnv_arenaroot = NULL;
11572 PL_xnv_root = NULL;
11573 PL_xrv_arenaroot = NULL;
11574 PL_xrv_root = NULL;
11575 PL_xpv_arenaroot = NULL;
11576 PL_xpv_root = NULL;
11577 PL_xpviv_arenaroot = NULL;
11578 PL_xpviv_root = NULL;
11579 PL_xpvnv_arenaroot = NULL;
11580 PL_xpvnv_root = NULL;
11581 PL_xpvcv_arenaroot = NULL;
11582 PL_xpvcv_root = NULL;
11583 PL_xpvav_arenaroot = NULL;
11584 PL_xpvav_root = NULL;
11585 PL_xpvhv_arenaroot = NULL;
11586 PL_xpvhv_root = NULL;
11587 PL_xpvmg_arenaroot = NULL;
11588 PL_xpvmg_root = NULL;
11589 PL_xpvlv_arenaroot = NULL;
11590 PL_xpvlv_root = NULL;
11591 PL_xpvbm_arenaroot = NULL;
11592 PL_xpvbm_root = NULL;
11593 PL_he_arenaroot = NULL;
11595 PL_nice_chunk = NULL;
11596 PL_nice_chunk_size = 0;
11598 PL_sv_objcount = 0;
11599 PL_sv_root = Nullsv;
11600 PL_sv_arenaroot = Nullsv;
11602 PL_debug = proto_perl->Idebug;
11604 #ifdef USE_REENTRANT_API
11605 /* XXX: things like -Dm will segfault here in perlio, but doing
11606 * PERL_SET_CONTEXT(proto_perl);
11607 * breaks too many other things
11609 Perl_reentrant_init(aTHX);
11612 /* create SV map for pointer relocation */
11613 PL_ptr_table = ptr_table_new();
11615 /* initialize these special pointers as early as possible */
11616 SvANY(&PL_sv_undef) = NULL;
11617 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
11618 SvFLAGS(&PL_sv_undef) = SVf_READONLY|SVt_NULL;
11619 ptr_table_store(PL_ptr_table, &proto_perl->Isv_undef, &PL_sv_undef);
11621 SvANY(&PL_sv_no) = new_XPVNV();
11622 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
11623 SvFLAGS(&PL_sv_no) = SVp_IOK|SVf_IOK|SVp_NOK|SVf_NOK
11624 |SVp_POK|SVf_POK|SVf_READONLY|SVt_PVNV;
11625 SvPVX(&PL_sv_no) = SAVEPVN(PL_No, 0);
11626 SvCUR(&PL_sv_no) = 0;
11627 SvLEN(&PL_sv_no) = 1;
11628 SvIVX(&PL_sv_no) = 0;
11629 SvNVX(&PL_sv_no) = 0;
11630 ptr_table_store(PL_ptr_table, &proto_perl->Isv_no, &PL_sv_no);
11632 SvANY(&PL_sv_yes) = new_XPVNV();
11633 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
11634 SvFLAGS(&PL_sv_yes) = SVp_IOK|SVf_IOK|SVp_NOK|SVf_NOK
11635 |SVp_POK|SVf_POK|SVf_READONLY|SVt_PVNV;
11636 SvPVX(&PL_sv_yes) = SAVEPVN(PL_Yes, 1);
11637 SvCUR(&PL_sv_yes) = 1;
11638 SvLEN(&PL_sv_yes) = 2;
11639 SvIVX(&PL_sv_yes) = 1;
11640 SvNVX(&PL_sv_yes) = 1;
11641 ptr_table_store(PL_ptr_table, &proto_perl->Isv_yes, &PL_sv_yes);
11643 /* create (a non-shared!) shared string table */
11644 PL_strtab = newHV();
11645 HvSHAREKEYS_off(PL_strtab);
11646 hv_ksplit(PL_strtab, 512);
11647 ptr_table_store(PL_ptr_table, proto_perl->Istrtab, PL_strtab);
11649 PL_compiling = proto_perl->Icompiling;
11651 /* These two PVs will be free'd special way so must set them same way op.c does */
11652 PL_compiling.cop_stashpv = savesharedpv(PL_compiling.cop_stashpv);
11653 ptr_table_store(PL_ptr_table, proto_perl->Icompiling.cop_stashpv, PL_compiling.cop_stashpv);
11655 PL_compiling.cop_file = savesharedpv(PL_compiling.cop_file);
11656 ptr_table_store(PL_ptr_table, proto_perl->Icompiling.cop_file, PL_compiling.cop_file);
11658 ptr_table_store(PL_ptr_table, &proto_perl->Icompiling, &PL_compiling);
11659 if (!specialWARN(PL_compiling.cop_warnings))
11660 PL_compiling.cop_warnings = sv_dup_inc(PL_compiling.cop_warnings, param);
11661 if (!specialCopIO(PL_compiling.cop_io))
11662 PL_compiling.cop_io = sv_dup_inc(PL_compiling.cop_io, param);
11663 PL_curcop = (COP*)any_dup(proto_perl->Tcurcop, proto_perl);
11665 /* pseudo environmental stuff */
11666 PL_origargc = proto_perl->Iorigargc;
11667 PL_origargv = proto_perl->Iorigargv;
11669 param->stashes = newAV(); /* Setup array of objects to call clone on */
11671 #ifdef PERLIO_LAYERS
11672 /* Clone PerlIO tables as soon as we can handle general xx_dup() */
11673 PerlIO_clone(aTHX_ proto_perl, param);
11676 PL_envgv = gv_dup(proto_perl->Ienvgv, param);
11677 PL_incgv = gv_dup(proto_perl->Iincgv, param);
11678 PL_hintgv = gv_dup(proto_perl->Ihintgv, param);
11679 PL_origfilename = SAVEPV(proto_perl->Iorigfilename);
11680 PL_diehook = sv_dup_inc(proto_perl->Idiehook, param);
11681 PL_warnhook = sv_dup_inc(proto_perl->Iwarnhook, param);
11684 PL_minus_c = proto_perl->Iminus_c;
11685 PL_patchlevel = sv_dup_inc(proto_perl->Ipatchlevel, param);
11686 PL_localpatches = proto_perl->Ilocalpatches;
11687 PL_splitstr = proto_perl->Isplitstr;
11688 PL_preprocess = proto_perl->Ipreprocess;
11689 PL_minus_n = proto_perl->Iminus_n;
11690 PL_minus_p = proto_perl->Iminus_p;
11691 PL_minus_l = proto_perl->Iminus_l;
11692 PL_minus_a = proto_perl->Iminus_a;
11693 PL_minus_F = proto_perl->Iminus_F;
11694 PL_doswitches = proto_perl->Idoswitches;
11695 PL_dowarn = proto_perl->Idowarn;
11696 PL_doextract = proto_perl->Idoextract;
11697 PL_sawampersand = proto_perl->Isawampersand;
11698 PL_unsafe = proto_perl->Iunsafe;
11699 PL_inplace = SAVEPV(proto_perl->Iinplace);
11700 PL_e_script = sv_dup_inc(proto_perl->Ie_script, param);
11701 PL_perldb = proto_perl->Iperldb;
11702 PL_perl_destruct_level = proto_perl->Iperl_destruct_level;
11703 PL_exit_flags = proto_perl->Iexit_flags;
11705 /* magical thingies */
11706 /* XXX time(&PL_basetime) when asked for? */
11707 PL_basetime = proto_perl->Ibasetime;
11708 PL_formfeed = sv_dup(proto_perl->Iformfeed, param);
11710 PL_maxsysfd = proto_perl->Imaxsysfd;
11711 PL_multiline = proto_perl->Imultiline;
11712 PL_statusvalue = proto_perl->Istatusvalue;
11714 PL_statusvalue_vms = proto_perl->Istatusvalue_vms;
11716 PL_encoding = sv_dup(proto_perl->Iencoding, param);
11718 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
11719 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
11720 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
11722 /* Clone the regex array */
11723 PL_regex_padav = newAV();
11725 I32 len = av_len((AV*)proto_perl->Iregex_padav);
11726 SV** regexen = AvARRAY((AV*)proto_perl->Iregex_padav);
11727 av_push(PL_regex_padav,
11728 sv_dup_inc(regexen[0],param));
11729 for(i = 1; i <= len; i++) {
11730 if(SvREPADTMP(regexen[i])) {
11731 av_push(PL_regex_padav, sv_dup_inc(regexen[i], param));
11733 av_push(PL_regex_padav,
11735 newSViv(PTR2IV(re_dup(INT2PTR(REGEXP *,
11736 SvIVX(regexen[i])), param)))
11741 PL_regex_pad = AvARRAY(PL_regex_padav);
11743 /* shortcuts to various I/O objects */
11744 PL_stdingv = gv_dup(proto_perl->Istdingv, param);
11745 PL_stderrgv = gv_dup(proto_perl->Istderrgv, param);
11746 PL_defgv = gv_dup(proto_perl->Idefgv, param);
11747 PL_argvgv = gv_dup(proto_perl->Iargvgv, param);
11748 PL_argvoutgv = gv_dup(proto_perl->Iargvoutgv, param);
11749 PL_argvout_stack = av_dup_inc(proto_perl->Iargvout_stack, param);
11751 /* shortcuts to regexp stuff */
11752 PL_replgv = gv_dup(proto_perl->Ireplgv, param);
11754 /* shortcuts to misc objects */
11755 PL_errgv = gv_dup(proto_perl->Ierrgv, param);
11757 /* shortcuts to debugging objects */
11758 PL_DBgv = gv_dup(proto_perl->IDBgv, param);
11759 PL_DBline = gv_dup(proto_perl->IDBline, param);
11760 PL_DBsub = gv_dup(proto_perl->IDBsub, param);
11761 PL_DBsingle = sv_dup(proto_perl->IDBsingle, param);
11762 PL_DBtrace = sv_dup(proto_perl->IDBtrace, param);
11763 PL_DBsignal = sv_dup(proto_perl->IDBsignal, param);
11764 PL_DBassertion = sv_dup(proto_perl->IDBassertion, param);
11765 PL_lineary = av_dup(proto_perl->Ilineary, param);
11766 PL_dbargs = av_dup(proto_perl->Idbargs, param);
11768 /* symbol tables */
11769 PL_defstash = hv_dup_inc(proto_perl->Tdefstash, param);
11770 PL_curstash = hv_dup(proto_perl->Tcurstash, param);
11771 PL_debstash = hv_dup(proto_perl->Idebstash, param);
11772 PL_globalstash = hv_dup(proto_perl->Iglobalstash, param);
11773 PL_curstname = sv_dup_inc(proto_perl->Icurstname, param);
11775 PL_beginav = av_dup_inc(proto_perl->Ibeginav, param);
11776 PL_beginav_save = av_dup_inc(proto_perl->Ibeginav_save, param);
11777 PL_checkav_save = av_dup_inc(proto_perl->Icheckav_save, param);
11778 PL_endav = av_dup_inc(proto_perl->Iendav, param);
11779 PL_checkav = av_dup_inc(proto_perl->Icheckav, param);
11780 PL_initav = av_dup_inc(proto_perl->Iinitav, param);
11782 PL_sub_generation = proto_perl->Isub_generation;
11784 /* funky return mechanisms */
11785 PL_forkprocess = proto_perl->Iforkprocess;
11787 /* subprocess state */
11788 PL_fdpid = av_dup_inc(proto_perl->Ifdpid, param);
11790 /* internal state */
11791 PL_tainting = proto_perl->Itainting;
11792 PL_taint_warn = proto_perl->Itaint_warn;
11793 PL_maxo = proto_perl->Imaxo;
11794 if (proto_perl->Iop_mask)
11795 PL_op_mask = SAVEPVN(proto_perl->Iop_mask, PL_maxo);
11797 PL_op_mask = Nullch;
11798 /* PL_asserting = proto_perl->Iasserting; */
11800 /* current interpreter roots */
11801 PL_main_cv = cv_dup_inc(proto_perl->Imain_cv, param);
11802 PL_main_root = OpREFCNT_inc(proto_perl->Imain_root);
11803 PL_main_start = proto_perl->Imain_start;
11804 PL_eval_root = proto_perl->Ieval_root;
11805 PL_eval_start = proto_perl->Ieval_start;
11807 /* runtime control stuff */
11808 PL_curcopdb = (COP*)any_dup(proto_perl->Icurcopdb, proto_perl);
11809 PL_copline = proto_perl->Icopline;
11811 PL_filemode = proto_perl->Ifilemode;
11812 PL_lastfd = proto_perl->Ilastfd;
11813 PL_oldname = proto_perl->Ioldname; /* XXX not quite right */
11816 PL_gensym = proto_perl->Igensym;
11817 PL_preambled = proto_perl->Ipreambled;
11818 PL_preambleav = av_dup_inc(proto_perl->Ipreambleav, param);
11819 PL_laststatval = proto_perl->Ilaststatval;
11820 PL_laststype = proto_perl->Ilaststype;
11821 PL_mess_sv = Nullsv;
11823 PL_ors_sv = sv_dup_inc(proto_perl->Iors_sv, param);
11824 PL_ofmt = SAVEPV(proto_perl->Iofmt);
11826 /* interpreter atexit processing */
11827 PL_exitlistlen = proto_perl->Iexitlistlen;
11828 if (PL_exitlistlen) {
11829 New(0, PL_exitlist, PL_exitlistlen, PerlExitListEntry);
11830 Copy(proto_perl->Iexitlist, PL_exitlist, PL_exitlistlen, PerlExitListEntry);
11833 PL_exitlist = (PerlExitListEntry*)NULL;
11834 PL_modglobal = hv_dup_inc(proto_perl->Imodglobal, param);
11835 PL_custom_op_names = hv_dup_inc(proto_perl->Icustom_op_names,param);
11836 PL_custom_op_descs = hv_dup_inc(proto_perl->Icustom_op_descs,param);
11838 PL_profiledata = NULL;
11839 PL_rsfp = fp_dup(proto_perl->Irsfp, '<', param);
11840 /* PL_rsfp_filters entries have fake IoDIRP() */
11841 PL_rsfp_filters = av_dup_inc(proto_perl->Irsfp_filters, param);
11843 PL_compcv = cv_dup(proto_perl->Icompcv, param);
11845 PAD_CLONE_VARS(proto_perl, param);
11847 #ifdef HAVE_INTERP_INTERN
11848 sys_intern_dup(&proto_perl->Isys_intern, &PL_sys_intern);
11851 /* more statics moved here */
11852 PL_generation = proto_perl->Igeneration;
11853 PL_DBcv = cv_dup(proto_perl->IDBcv, param);
11855 PL_in_clean_objs = proto_perl->Iin_clean_objs;
11856 PL_in_clean_all = proto_perl->Iin_clean_all;
11858 PL_uid = proto_perl->Iuid;
11859 PL_euid = proto_perl->Ieuid;
11860 PL_gid = proto_perl->Igid;
11861 PL_egid = proto_perl->Iegid;
11862 PL_nomemok = proto_perl->Inomemok;
11863 PL_an = proto_perl->Ian;
11864 PL_evalseq = proto_perl->Ievalseq;
11865 PL_origenviron = proto_perl->Iorigenviron; /* XXX not quite right */
11866 PL_origalen = proto_perl->Iorigalen;
11867 PL_pidstatus = newHV(); /* XXX flag for cloning? */
11868 PL_osname = SAVEPV(proto_perl->Iosname);
11869 PL_sh_path_compat = proto_perl->Ish_path_compat; /* XXX never deallocated */
11870 PL_sighandlerp = proto_perl->Isighandlerp;
11873 PL_runops = proto_perl->Irunops;
11875 Copy(proto_perl->Itokenbuf, PL_tokenbuf, 256, char);
11878 PL_cshlen = proto_perl->Icshlen;
11879 PL_cshname = proto_perl->Icshname; /* XXX never deallocated */
11882 PL_lex_state = proto_perl->Ilex_state;
11883 PL_lex_defer = proto_perl->Ilex_defer;
11884 PL_lex_expect = proto_perl->Ilex_expect;
11885 PL_lex_formbrack = proto_perl->Ilex_formbrack;
11886 PL_lex_dojoin = proto_perl->Ilex_dojoin;
11887 PL_lex_starts = proto_perl->Ilex_starts;
11888 PL_lex_stuff = sv_dup_inc(proto_perl->Ilex_stuff, param);
11889 PL_lex_repl = sv_dup_inc(proto_perl->Ilex_repl, param);
11890 PL_lex_op = proto_perl->Ilex_op;
11891 PL_lex_inpat = proto_perl->Ilex_inpat;
11892 PL_lex_inwhat = proto_perl->Ilex_inwhat;
11893 PL_lex_brackets = proto_perl->Ilex_brackets;
11894 i = (PL_lex_brackets < 120 ? 120 : PL_lex_brackets);
11895 PL_lex_brackstack = SAVEPVN(proto_perl->Ilex_brackstack,i);
11896 PL_lex_casemods = proto_perl->Ilex_casemods;
11897 i = (PL_lex_casemods < 12 ? 12 : PL_lex_casemods);
11898 PL_lex_casestack = SAVEPVN(proto_perl->Ilex_casestack,i);
11900 Copy(proto_perl->Inextval, PL_nextval, 5, YYSTYPE);
11901 Copy(proto_perl->Inexttype, PL_nexttype, 5, I32);
11902 PL_nexttoke = proto_perl->Inexttoke;
11904 /* XXX This is probably masking the deeper issue of why
11905 * SvANY(proto_perl->Ilinestr) can be NULL at this point. For test case:
11906 * http://archive.develooper.com/perl5-porters%40perl.org/msg83298.html
11907 * (A little debugging with a watchpoint on it may help.)
11909 if (SvANY(proto_perl->Ilinestr)) {
11910 PL_linestr = sv_dup_inc(proto_perl->Ilinestr, param);
11911 i = proto_perl->Ibufptr - SvPVX(proto_perl->Ilinestr);
11912 PL_bufptr = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
11913 i = proto_perl->Ioldbufptr - SvPVX(proto_perl->Ilinestr);
11914 PL_oldbufptr = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
11915 i = proto_perl->Ioldoldbufptr - SvPVX(proto_perl->Ilinestr);
11916 PL_oldoldbufptr = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
11917 i = proto_perl->Ilinestart - SvPVX(proto_perl->Ilinestr);
11918 PL_linestart = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
11921 PL_linestr = NEWSV(65,79);
11922 sv_upgrade(PL_linestr,SVt_PVIV);
11923 sv_setpvn(PL_linestr,"",0);
11924 PL_bufptr = PL_oldbufptr = PL_oldoldbufptr = PL_linestart = SvPVX(PL_linestr);
11926 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
11927 PL_pending_ident = proto_perl->Ipending_ident;
11928 PL_sublex_info = proto_perl->Isublex_info; /* XXX not quite right */
11930 PL_expect = proto_perl->Iexpect;
11932 PL_multi_start = proto_perl->Imulti_start;
11933 PL_multi_end = proto_perl->Imulti_end;
11934 PL_multi_open = proto_perl->Imulti_open;
11935 PL_multi_close = proto_perl->Imulti_close;
11937 PL_error_count = proto_perl->Ierror_count;
11938 PL_subline = proto_perl->Isubline;
11939 PL_subname = sv_dup_inc(proto_perl->Isubname, param);
11941 /* XXX See comment on SvANY(proto_perl->Ilinestr) above */
11942 if (SvANY(proto_perl->Ilinestr)) {
11943 i = proto_perl->Ilast_uni - SvPVX(proto_perl->Ilinestr);
11944 PL_last_uni = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
11945 i = proto_perl->Ilast_lop - SvPVX(proto_perl->Ilinestr);
11946 PL_last_lop = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
11947 PL_last_lop_op = proto_perl->Ilast_lop_op;
11950 PL_last_uni = SvPVX(PL_linestr);
11951 PL_last_lop = SvPVX(PL_linestr);
11952 PL_last_lop_op = 0;
11954 PL_in_my = proto_perl->Iin_my;
11955 PL_in_my_stash = hv_dup(proto_perl->Iin_my_stash, param);
11957 PL_cryptseen = proto_perl->Icryptseen;
11960 PL_hints = proto_perl->Ihints;
11962 PL_amagic_generation = proto_perl->Iamagic_generation;
11964 #ifdef USE_LOCALE_COLLATE
11965 PL_collation_ix = proto_perl->Icollation_ix;
11966 PL_collation_name = SAVEPV(proto_perl->Icollation_name);
11967 PL_collation_standard = proto_perl->Icollation_standard;
11968 PL_collxfrm_base = proto_perl->Icollxfrm_base;
11969 PL_collxfrm_mult = proto_perl->Icollxfrm_mult;
11970 #endif /* USE_LOCALE_COLLATE */
11972 #ifdef USE_LOCALE_NUMERIC
11973 PL_numeric_name = SAVEPV(proto_perl->Inumeric_name);
11974 PL_numeric_standard = proto_perl->Inumeric_standard;
11975 PL_numeric_local = proto_perl->Inumeric_local;
11976 PL_numeric_radix_sv = sv_dup_inc(proto_perl->Inumeric_radix_sv, param);
11977 #endif /* !USE_LOCALE_NUMERIC */
11979 /* utf8 character classes */
11980 PL_utf8_alnum = sv_dup_inc(proto_perl->Iutf8_alnum, param);
11981 PL_utf8_alnumc = sv_dup_inc(proto_perl->Iutf8_alnumc, param);
11982 PL_utf8_ascii = sv_dup_inc(proto_perl->Iutf8_ascii, param);
11983 PL_utf8_alpha = sv_dup_inc(proto_perl->Iutf8_alpha, param);
11984 PL_utf8_space = sv_dup_inc(proto_perl->Iutf8_space, param);
11985 PL_utf8_cntrl = sv_dup_inc(proto_perl->Iutf8_cntrl, param);
11986 PL_utf8_graph = sv_dup_inc(proto_perl->Iutf8_graph, param);
11987 PL_utf8_digit = sv_dup_inc(proto_perl->Iutf8_digit, param);
11988 PL_utf8_upper = sv_dup_inc(proto_perl->Iutf8_upper, param);
11989 PL_utf8_lower = sv_dup_inc(proto_perl->Iutf8_lower, param);
11990 PL_utf8_print = sv_dup_inc(proto_perl->Iutf8_print, param);
11991 PL_utf8_punct = sv_dup_inc(proto_perl->Iutf8_punct, param);
11992 PL_utf8_xdigit = sv_dup_inc(proto_perl->Iutf8_xdigit, param);
11993 PL_utf8_mark = sv_dup_inc(proto_perl->Iutf8_mark, param);
11994 PL_utf8_toupper = sv_dup_inc(proto_perl->Iutf8_toupper, param);
11995 PL_utf8_totitle = sv_dup_inc(proto_perl->Iutf8_totitle, param);
11996 PL_utf8_tolower = sv_dup_inc(proto_perl->Iutf8_tolower, param);
11997 PL_utf8_tofold = sv_dup_inc(proto_perl->Iutf8_tofold, param);
11998 PL_utf8_idstart = sv_dup_inc(proto_perl->Iutf8_idstart, param);
11999 PL_utf8_idcont = sv_dup_inc(proto_perl->Iutf8_idcont, param);
12001 /* Did the locale setup indicate UTF-8? */
12002 PL_utf8locale = proto_perl->Iutf8locale;
12003 /* Unicode features (see perlrun/-C) */
12004 PL_unicode = proto_perl->Iunicode;
12006 /* Pre-5.8 signals control */
12007 PL_signals = proto_perl->Isignals;
12009 /* times() ticks per second */
12010 PL_clocktick = proto_perl->Iclocktick;
12012 /* Recursion stopper for PerlIO_find_layer */
12013 PL_in_load_module = proto_perl->Iin_load_module;
12015 /* sort() routine */
12016 PL_sort_RealCmp = proto_perl->Isort_RealCmp;
12018 /* Not really needed/useful since the reenrant_retint is "volatile",
12019 * but do it for consistency's sake. */
12020 PL_reentrant_retint = proto_perl->Ireentrant_retint;
12022 /* Hooks to shared SVs and locks. */
12023 PL_sharehook = proto_perl->Isharehook;
12024 PL_lockhook = proto_perl->Ilockhook;
12025 PL_unlockhook = proto_perl->Iunlockhook;
12026 PL_threadhook = proto_perl->Ithreadhook;
12028 PL_runops_std = proto_perl->Irunops_std;
12029 PL_runops_dbg = proto_perl->Irunops_dbg;
12031 #ifdef THREADS_HAVE_PIDS
12032 PL_ppid = proto_perl->Ippid;
12036 PL_last_swash_hv = Nullhv; /* reinits on demand */
12037 PL_last_swash_klen = 0;
12038 PL_last_swash_key[0]= '\0';
12039 PL_last_swash_tmps = (U8*)NULL;
12040 PL_last_swash_slen = 0;
12042 PL_glob_index = proto_perl->Iglob_index;
12043 PL_srand_called = proto_perl->Isrand_called;
12044 PL_hash_seed = proto_perl->Ihash_seed;
12045 PL_rehash_seed = proto_perl->Irehash_seed;
12046 PL_uudmap['M'] = 0; /* reinits on demand */
12047 PL_bitcount = Nullch; /* reinits on demand */
12049 if (proto_perl->Ipsig_pend) {
12050 Newz(0, PL_psig_pend, SIG_SIZE, int);
12053 PL_psig_pend = (int*)NULL;
12056 if (proto_perl->Ipsig_ptr) {
12057 Newz(0, PL_psig_ptr, SIG_SIZE, SV*);
12058 Newz(0, PL_psig_name, SIG_SIZE, SV*);
12059 for (i = 1; i < SIG_SIZE; i++) {
12060 PL_psig_ptr[i] = sv_dup_inc(proto_perl->Ipsig_ptr[i], param);
12061 PL_psig_name[i] = sv_dup_inc(proto_perl->Ipsig_name[i], param);
12065 PL_psig_ptr = (SV**)NULL;
12066 PL_psig_name = (SV**)NULL;
12069 /* thrdvar.h stuff */
12071 if (flags & CLONEf_COPY_STACKS) {
12072 /* next allocation will be PL_tmps_stack[PL_tmps_ix+1] */
12073 PL_tmps_ix = proto_perl->Ttmps_ix;
12074 PL_tmps_max = proto_perl->Ttmps_max;
12075 PL_tmps_floor = proto_perl->Ttmps_floor;
12076 Newz(50, PL_tmps_stack, PL_tmps_max, SV*);
12078 while (i <= PL_tmps_ix) {
12079 PL_tmps_stack[i] = sv_dup_inc(proto_perl->Ttmps_stack[i], param);
12083 /* next PUSHMARK() sets *(PL_markstack_ptr+1) */
12084 i = proto_perl->Tmarkstack_max - proto_perl->Tmarkstack;
12085 Newz(54, PL_markstack, i, I32);
12086 PL_markstack_max = PL_markstack + (proto_perl->Tmarkstack_max
12087 - proto_perl->Tmarkstack);
12088 PL_markstack_ptr = PL_markstack + (proto_perl->Tmarkstack_ptr
12089 - proto_perl->Tmarkstack);
12090 Copy(proto_perl->Tmarkstack, PL_markstack,
12091 PL_markstack_ptr - PL_markstack + 1, I32);
12093 /* next push_scope()/ENTER sets PL_scopestack[PL_scopestack_ix]
12094 * NOTE: unlike the others! */
12095 PL_scopestack_ix = proto_perl->Tscopestack_ix;
12096 PL_scopestack_max = proto_perl->Tscopestack_max;
12097 Newz(54, PL_scopestack, PL_scopestack_max, I32);
12098 Copy(proto_perl->Tscopestack, PL_scopestack, PL_scopestack_ix, I32);
12100 /* NOTE: si_dup() looks at PL_markstack */
12101 PL_curstackinfo = si_dup(proto_perl->Tcurstackinfo, param);
12103 /* PL_curstack = PL_curstackinfo->si_stack; */
12104 PL_curstack = av_dup(proto_perl->Tcurstack, param);
12105 PL_mainstack = av_dup(proto_perl->Tmainstack, param);
12107 /* next PUSHs() etc. set *(PL_stack_sp+1) */
12108 PL_stack_base = AvARRAY(PL_curstack);
12109 PL_stack_sp = PL_stack_base + (proto_perl->Tstack_sp
12110 - proto_perl->Tstack_base);
12111 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
12113 /* next SSPUSHFOO() sets PL_savestack[PL_savestack_ix]
12114 * NOTE: unlike the others! */
12115 PL_savestack_ix = proto_perl->Tsavestack_ix;
12116 PL_savestack_max = proto_perl->Tsavestack_max;
12117 /*Newz(54, PL_savestack, PL_savestack_max, ANY);*/
12118 PL_savestack = ss_dup(proto_perl, param);
12122 ENTER; /* perl_destruct() wants to LEAVE; */
12125 PL_start_env = proto_perl->Tstart_env; /* XXXXXX */
12126 PL_top_env = &PL_start_env;
12128 PL_op = proto_perl->Top;
12131 PL_Xpv = (XPV*)NULL;
12132 PL_na = proto_perl->Tna;
12134 PL_statbuf = proto_perl->Tstatbuf;
12135 PL_statcache = proto_perl->Tstatcache;
12136 PL_statgv = gv_dup(proto_perl->Tstatgv, param);
12137 PL_statname = sv_dup_inc(proto_perl->Tstatname, param);
12139 PL_timesbuf = proto_perl->Ttimesbuf;
12142 PL_tainted = proto_perl->Ttainted;
12143 PL_curpm = proto_perl->Tcurpm; /* XXX No PMOP ref count */
12144 PL_rs = sv_dup_inc(proto_perl->Trs, param);
12145 PL_last_in_gv = gv_dup(proto_perl->Tlast_in_gv, param);
12146 PL_ofs_sv = sv_dup_inc(proto_perl->Tofs_sv, param);
12147 PL_defoutgv = gv_dup_inc(proto_perl->Tdefoutgv, param);
12148 PL_chopset = proto_perl->Tchopset; /* XXX never deallocated */
12149 PL_toptarget = sv_dup_inc(proto_perl->Ttoptarget, param);
12150 PL_bodytarget = sv_dup_inc(proto_perl->Tbodytarget, param);
12151 PL_formtarget = sv_dup(proto_perl->Tformtarget, param);
12153 PL_restartop = proto_perl->Trestartop;
12154 PL_in_eval = proto_perl->Tin_eval;
12155 PL_delaymagic = proto_perl->Tdelaymagic;
12156 PL_dirty = proto_perl->Tdirty;
12157 PL_localizing = proto_perl->Tlocalizing;
12159 #ifdef PERL_FLEXIBLE_EXCEPTIONS
12160 PL_protect = proto_perl->Tprotect;
12162 PL_errors = sv_dup_inc(proto_perl->Terrors, param);
12163 PL_hv_fetch_ent_mh = Nullhe;
12164 PL_modcount = proto_perl->Tmodcount;
12165 PL_lastgotoprobe = Nullop;
12166 PL_dumpindent = proto_perl->Tdumpindent;
12168 PL_sortcop = (OP*)any_dup(proto_perl->Tsortcop, proto_perl);
12169 PL_sortstash = hv_dup(proto_perl->Tsortstash, param);
12170 PL_firstgv = gv_dup(proto_perl->Tfirstgv, param);
12171 PL_secondgv = gv_dup(proto_perl->Tsecondgv, param);
12172 PL_sortcxix = proto_perl->Tsortcxix;
12173 PL_efloatbuf = Nullch; /* reinits on demand */
12174 PL_efloatsize = 0; /* reinits on demand */
12178 PL_screamfirst = NULL;
12179 PL_screamnext = NULL;
12180 PL_maxscream = -1; /* reinits on demand */
12181 PL_lastscream = Nullsv;
12183 PL_watchaddr = NULL;
12184 PL_watchok = Nullch;
12186 PL_regdummy = proto_perl->Tregdummy;
12187 PL_regprecomp = Nullch;
12190 PL_colorset = 0; /* reinits PL_colors[] */
12191 /*PL_colors[6] = {0,0,0,0,0,0};*/
12192 PL_reginput = Nullch;
12193 PL_regbol = Nullch;
12194 PL_regeol = Nullch;
12195 PL_regstartp = (I32*)NULL;
12196 PL_regendp = (I32*)NULL;
12197 PL_reglastparen = (U32*)NULL;
12198 PL_reglastcloseparen = (U32*)NULL;
12199 PL_regtill = Nullch;
12200 PL_reg_start_tmp = (char**)NULL;
12201 PL_reg_start_tmpl = 0;
12202 PL_regdata = (struct reg_data*)NULL;
12205 PL_reg_eval_set = 0;
12207 PL_regprogram = (regnode*)NULL;
12209 PL_regcc = (CURCUR*)NULL;
12210 PL_reg_call_cc = (struct re_cc_state*)NULL;
12211 PL_reg_re = (regexp*)NULL;
12212 PL_reg_ganch = Nullch;
12213 PL_reg_sv = Nullsv;
12214 PL_reg_match_utf8 = FALSE;
12215 PL_reg_magic = (MAGIC*)NULL;
12217 PL_reg_oldcurpm = (PMOP*)NULL;
12218 PL_reg_curpm = (PMOP*)NULL;
12219 PL_reg_oldsaved = Nullch;
12220 PL_reg_oldsavedlen = 0;
12221 #ifdef PERL_COPY_ON_WRITE
12224 PL_reg_maxiter = 0;
12225 PL_reg_leftiter = 0;
12226 PL_reg_poscache = Nullch;
12227 PL_reg_poscache_size= 0;
12229 /* RE engine - function pointers */
12230 PL_regcompp = proto_perl->Tregcompp;
12231 PL_regexecp = proto_perl->Tregexecp;
12232 PL_regint_start = proto_perl->Tregint_start;
12233 PL_regint_string = proto_perl->Tregint_string;
12234 PL_regfree = proto_perl->Tregfree;
12236 PL_reginterp_cnt = 0;
12237 PL_reg_starttry = 0;
12239 /* Pluggable optimizer */
12240 PL_peepp = proto_perl->Tpeepp;
12242 PL_stashcache = newHV();
12244 if (!(flags & CLONEf_KEEP_PTR_TABLE)) {
12245 ptr_table_free(PL_ptr_table);
12246 PL_ptr_table = NULL;
12249 /* Call the ->CLONE method, if it exists, for each of the stashes
12250 identified by sv_dup() above.
12252 while(av_len(param->stashes) != -1) {
12253 HV* stash = (HV*) av_shift(param->stashes);
12254 GV* cloner = gv_fetchmethod_autoload(stash, "CLONE", 0);
12255 if (cloner && GvCV(cloner)) {
12260 XPUSHs(sv_2mortal(newSVpv(HvNAME(stash), 0)));
12262 call_sv((SV*)GvCV(cloner), G_DISCARD);
12268 SvREFCNT_dec(param->stashes);
12273 #endif /* USE_ITHREADS */
12276 =head1 Unicode Support
12278 =for apidoc sv_recode_to_utf8
12280 The encoding is assumed to be an Encode object, on entry the PV
12281 of the sv is assumed to be octets in that encoding, and the sv
12282 will be converted into Unicode (and UTF-8).
12284 If the sv already is UTF-8 (or if it is not POK), or if the encoding
12285 is not a reference, nothing is done to the sv. If the encoding is not
12286 an C<Encode::XS> Encoding object, bad things will happen.
12287 (See F<lib/encoding.pm> and L<Encode>).
12289 The PV of the sv is returned.
12294 Perl_sv_recode_to_utf8(pTHX_ SV *sv, SV *encoding)
12296 if (SvPOK(sv) && !SvUTF8(sv) && !IN_BYTES && SvROK(encoding)) {
12310 Passing sv_yes is wrong - it needs to be or'ed set of constants
12311 for Encode::XS, while UTf-8 decode (currently) assumes a true value means
12312 remove converted chars from source.
12314 Both will default the value - let them.
12316 XPUSHs(&PL_sv_yes);
12319 call_method("decode", G_SCALAR);
12323 s = SvPV(uni, len);
12324 if (s != SvPVX(sv)) {
12325 SvGROW(sv, len + 1);
12326 Move(s, SvPVX(sv), len, char);
12327 SvCUR_set(sv, len);
12328 SvPVX(sv)[len] = 0;
12335 return SvPOKp(sv) ? SvPVX(sv) : NULL;
12339 =for apidoc sv_cat_decode
12341 The encoding is assumed to be an Encode object, the PV of the ssv is
12342 assumed to be octets in that encoding and decoding the input starts
12343 from the position which (PV + *offset) pointed to. The dsv will be
12344 concatenated the decoded UTF-8 string from ssv. Decoding will terminate
12345 when the string tstr appears in decoding output or the input ends on
12346 the PV of the ssv. The value which the offset points will be modified
12347 to the last input position on the ssv.
12349 Returns TRUE if the terminator was found, else returns FALSE.
12354 Perl_sv_cat_decode(pTHX_ SV *dsv, SV *encoding,
12355 SV *ssv, int *offset, char *tstr, int tlen)
12358 if (SvPOK(ssv) && SvPOK(dsv) && SvROK(encoding) && offset) {
12369 XPUSHs(offsv = sv_2mortal(newSViv(*offset)));
12370 XPUSHs(sv_2mortal(newSVpvn(tstr, tlen)));
12372 call_method("cat_decode", G_SCALAR);
12374 ret = SvTRUE(TOPs);
12375 *offset = SvIV(offsv);
12381 Perl_croak(aTHX_ "Invalid argument to sv_cat_decode");