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)
1764 MAGIC* magic = NULL;
1767 if (mt != SVt_PV && SvIsCOW(sv)) {
1768 sv_force_normal_flags(sv, 0);
1771 if (SvTYPE(sv) == mt)
1775 (void)SvOOK_off(sv);
1777 switch (SvTYPE(sv)) {
1798 else if (mt < SVt_PVIV)
1815 pv = (char*)SvRV(sv);
1835 else if (mt == SVt_NV)
1846 del_XPVIV(SvANY(sv));
1856 del_XPVNV(SvANY(sv));
1864 magic = SvMAGIC(sv);
1865 stash = SvSTASH(sv);
1866 del_XPVMG(SvANY(sv));
1869 Perl_croak(aTHX_ "Can't upgrade that kind of scalar");
1872 SvFLAGS(sv) &= ~SVTYPEMASK;
1877 Perl_croak(aTHX_ "Can't upgrade to undef");
1879 SvANY(sv) = new_XIV();
1883 SvANY(sv) = new_XNV();
1887 SvANY(sv) = new_XRV();
1891 SvANY(sv) = new_XPV();
1897 SvANY(sv) = new_XPVIV();
1907 SvANY(sv) = new_XPVNV();
1915 SvANY(sv) = new_XPVMG();
1921 SvMAGIC(sv) = magic;
1922 SvSTASH(sv) = stash;
1925 SvANY(sv) = new_XPVLV();
1931 SvMAGIC(sv) = magic;
1932 SvSTASH(sv) = stash;
1944 SvANY(sv) = new_XPVAV();
1952 SvMAGIC(sv) = magic;
1953 SvSTASH(sv) = stash;
1959 SvANY(sv) = new_XPVHV();
1965 HvTOTALKEYS(sv) = 0;
1966 HvPLACEHOLDERS(sv) = 0;
1967 SvMAGIC(sv) = magic;
1968 SvSTASH(sv) = stash;
1975 SvANY(sv) = new_XPVCV();
1976 Zero(SvANY(sv), 1, XPVCV);
1982 SvMAGIC(sv) = magic;
1983 SvSTASH(sv) = stash;
1986 SvANY(sv) = new_XPVGV();
1992 SvMAGIC(sv) = magic;
1993 SvSTASH(sv) = stash;
2001 SvANY(sv) = new_XPVBM();
2007 SvMAGIC(sv) = magic;
2008 SvSTASH(sv) = stash;
2014 SvANY(sv) = new_XPVFM();
2015 Zero(SvANY(sv), 1, XPVFM);
2021 SvMAGIC(sv) = magic;
2022 SvSTASH(sv) = stash;
2025 SvANY(sv) = new_XPVIO();
2026 Zero(SvANY(sv), 1, XPVIO);
2032 SvMAGIC(sv) = magic;
2033 SvSTASH(sv) = stash;
2034 IoPAGE_LEN(sv) = 60;
2041 =for apidoc sv_backoff
2043 Remove any string offset. You should normally use the C<SvOOK_off> macro
2050 Perl_sv_backoff(pTHX_ register SV *sv)
2054 char *s = SvPVX(sv);
2055 SvLEN(sv) += SvIVX(sv);
2056 SvPVX(sv) -= SvIVX(sv);
2058 Move(s, SvPVX(sv), SvCUR(sv)+1, char);
2060 SvFLAGS(sv) &= ~SVf_OOK;
2067 Expands the character buffer in the SV. If necessary, uses C<sv_unref> and
2068 upgrades the SV to C<SVt_PV>. Returns a pointer to the character buffer.
2069 Use the C<SvGROW> wrapper instead.
2075 Perl_sv_grow(pTHX_ register SV *sv, register STRLEN newlen)
2079 #ifdef HAS_64K_LIMIT
2080 if (newlen >= 0x10000) {
2081 PerlIO_printf(Perl_debug_log,
2082 "Allocation too large: %"UVxf"\n", (UV)newlen);
2085 #endif /* HAS_64K_LIMIT */
2088 if (SvTYPE(sv) < SVt_PV) {
2089 sv_upgrade(sv, SVt_PV);
2092 else if (SvOOK(sv)) { /* pv is offset? */
2095 if (newlen > SvLEN(sv))
2096 newlen += 10 * (newlen - SvCUR(sv)); /* avoid copy each time */
2097 #ifdef HAS_64K_LIMIT
2098 if (newlen >= 0x10000)
2105 if (newlen > SvLEN(sv)) { /* need more room? */
2106 if (SvLEN(sv) && s) {
2108 STRLEN l = malloced_size((void*)SvPVX(sv));
2114 Renew(s,newlen,char);
2117 New(703, s, newlen, char);
2118 if (SvPVX(sv) && SvCUR(sv)) {
2119 Move(SvPVX(sv), s, (newlen < SvCUR(sv)) ? newlen : SvCUR(sv), char);
2123 SvLEN_set(sv, newlen);
2129 =for apidoc sv_setiv
2131 Copies an integer into the given SV, upgrading first if necessary.
2132 Does not handle 'set' magic. See also C<sv_setiv_mg>.
2138 Perl_sv_setiv(pTHX_ register SV *sv, IV i)
2140 SV_CHECK_THINKFIRST_COW_DROP(sv);
2141 switch (SvTYPE(sv)) {
2143 sv_upgrade(sv, SVt_IV);
2146 sv_upgrade(sv, SVt_PVNV);
2150 sv_upgrade(sv, SVt_PVIV);
2159 Perl_croak(aTHX_ "Can't coerce %s to integer in %s", sv_reftype(sv,0),
2162 (void)SvIOK_only(sv); /* validate number */
2168 =for apidoc sv_setiv_mg
2170 Like C<sv_setiv>, but also handles 'set' magic.
2176 Perl_sv_setiv_mg(pTHX_ register SV *sv, IV i)
2183 =for apidoc sv_setuv
2185 Copies an unsigned integer into the given SV, upgrading first if necessary.
2186 Does not handle 'set' magic. See also C<sv_setuv_mg>.
2192 Perl_sv_setuv(pTHX_ register SV *sv, UV u)
2194 /* With these two if statements:
2195 u=1.49 s=0.52 cu=72.49 cs=10.64 scripts=270 tests=20865
2198 u=1.35 s=0.47 cu=73.45 cs=11.43 scripts=270 tests=20865
2200 If you wish to remove them, please benchmark to see what the effect is
2202 if (u <= (UV)IV_MAX) {
2203 sv_setiv(sv, (IV)u);
2212 =for apidoc sv_setuv_mg
2214 Like C<sv_setuv>, but also handles 'set' magic.
2220 Perl_sv_setuv_mg(pTHX_ register SV *sv, UV u)
2222 /* With these two if statements:
2223 u=1.49 s=0.52 cu=72.49 cs=10.64 scripts=270 tests=20865
2226 u=1.35 s=0.47 cu=73.45 cs=11.43 scripts=270 tests=20865
2228 If you wish to remove them, please benchmark to see what the effect is
2230 if (u <= (UV)IV_MAX) {
2231 sv_setiv(sv, (IV)u);
2241 =for apidoc sv_setnv
2243 Copies a double into the given SV, upgrading first if necessary.
2244 Does not handle 'set' magic. See also C<sv_setnv_mg>.
2250 Perl_sv_setnv(pTHX_ register SV *sv, NV num)
2252 SV_CHECK_THINKFIRST_COW_DROP(sv);
2253 switch (SvTYPE(sv)) {
2256 sv_upgrade(sv, SVt_NV);
2261 sv_upgrade(sv, SVt_PVNV);
2270 Perl_croak(aTHX_ "Can't coerce %s to number in %s", sv_reftype(sv,0),
2274 (void)SvNOK_only(sv); /* validate number */
2279 =for apidoc sv_setnv_mg
2281 Like C<sv_setnv>, but also handles 'set' magic.
2287 Perl_sv_setnv_mg(pTHX_ register SV *sv, NV num)
2293 /* Print an "isn't numeric" warning, using a cleaned-up,
2294 * printable version of the offending string
2298 S_not_a_number(pTHX_ SV *sv)
2305 dsv = sv_2mortal(newSVpv("", 0));
2306 pv = sv_uni_display(dsv, sv, 10, 0);
2309 char *limit = tmpbuf + sizeof(tmpbuf) - 8;
2310 /* each *s can expand to 4 chars + "...\0",
2311 i.e. need room for 8 chars */
2314 for (s = SvPVX(sv), end = s + SvCUR(sv); s < end && d < limit; s++) {
2316 if (ch & 128 && !isPRINT_LC(ch)) {
2325 else if (ch == '\r') {
2329 else if (ch == '\f') {
2333 else if (ch == '\\') {
2337 else if (ch == '\0') {
2341 else if (isPRINT_LC(ch))
2358 Perl_warner(aTHX_ packWARN(WARN_NUMERIC),
2359 "Argument \"%s\" isn't numeric in %s", pv,
2362 Perl_warner(aTHX_ packWARN(WARN_NUMERIC),
2363 "Argument \"%s\" isn't numeric", pv);
2367 =for apidoc looks_like_number
2369 Test if the content of an SV looks like a number (or is a number).
2370 C<Inf> and C<Infinity> are treated as numbers (so will not issue a
2371 non-numeric warning), even if your atof() doesn't grok them.
2377 Perl_looks_like_number(pTHX_ SV *sv)
2379 register char *sbegin;
2386 else if (SvPOKp(sv))
2387 sbegin = SvPV(sv, len);
2389 return SvFLAGS(sv) & (SVf_NOK|SVp_NOK|SVf_IOK|SVp_IOK);
2390 return grok_number(sbegin, len, NULL);
2393 /* Actually, ISO C leaves conversion of UV to IV undefined, but
2394 until proven guilty, assume that things are not that bad... */
2399 As 64 bit platforms often have an NV that doesn't preserve all bits of
2400 an IV (an assumption perl has been based on to date) it becomes necessary
2401 to remove the assumption that the NV always carries enough precision to
2402 recreate the IV whenever needed, and that the NV is the canonical form.
2403 Instead, IV/UV and NV need to be given equal rights. So as to not lose
2404 precision as a side effect of conversion (which would lead to insanity
2405 and the dragon(s) in t/op/numconvert.t getting very angry) the intent is
2406 1) to distinguish between IV/UV/NV slots that have cached a valid
2407 conversion where precision was lost and IV/UV/NV slots that have a
2408 valid conversion which has lost no precision
2409 2) to ensure that if a numeric conversion to one form is requested that
2410 would lose precision, the precise conversion (or differently
2411 imprecise conversion) is also performed and cached, to prevent
2412 requests for different numeric formats on the same SV causing
2413 lossy conversion chains. (lossless conversion chains are perfectly
2418 SvIOKp is true if the IV slot contains a valid value
2419 SvIOK is true only if the IV value is accurate (UV if SvIOK_UV true)
2420 SvNOKp is true if the NV slot contains a valid value
2421 SvNOK is true only if the NV value is accurate
2424 while converting from PV to NV, check to see if converting that NV to an
2425 IV(or UV) would lose accuracy over a direct conversion from PV to
2426 IV(or UV). If it would, cache both conversions, return NV, but mark
2427 SV as IOK NOKp (ie not NOK).
2429 While converting from PV to IV, check to see if converting that IV to an
2430 NV would lose accuracy over a direct conversion from PV to NV. If it
2431 would, cache both conversions, flag similarly.
2433 Before, the SV value "3.2" could become NV=3.2 IV=3 NOK, IOK quite
2434 correctly because if IV & NV were set NV *always* overruled.
2435 Now, "3.2" will become NV=3.2 IV=3 NOK, IOKp, because the flag's meaning
2436 changes - now IV and NV together means that the two are interchangeable:
2437 SvIVX == (IV) SvNVX && SvNVX == (NV) SvIVX;
2439 The benefit of this is that operations such as pp_add know that if
2440 SvIOK is true for both left and right operands, then integer addition
2441 can be used instead of floating point (for cases where the result won't
2442 overflow). Before, floating point was always used, which could lead to
2443 loss of precision compared with integer addition.
2445 * making IV and NV equal status should make maths accurate on 64 bit
2447 * may speed up maths somewhat if pp_add and friends start to use
2448 integers when possible instead of fp. (Hopefully the overhead in
2449 looking for SvIOK and checking for overflow will not outweigh the
2450 fp to integer speedup)
2451 * will slow down integer operations (callers of SvIV) on "inaccurate"
2452 values, as the change from SvIOK to SvIOKp will cause a call into
2453 sv_2iv each time rather than a macro access direct to the IV slot
2454 * should speed up number->string conversion on integers as IV is
2455 favoured when IV and NV are equally accurate
2457 ####################################################################
2458 You had better be using SvIOK_notUV if you want an IV for arithmetic:
2459 SvIOK is true if (IV or UV), so you might be getting (IV)SvUV.
2460 On the other hand, SvUOK is true iff UV.
2461 ####################################################################
2463 Your mileage will vary depending your CPU's relative fp to integer
2467 #ifndef NV_PRESERVES_UV
2468 # define IS_NUMBER_UNDERFLOW_IV 1
2469 # define IS_NUMBER_UNDERFLOW_UV 2
2470 # define IS_NUMBER_IV_AND_UV 2
2471 # define IS_NUMBER_OVERFLOW_IV 4
2472 # define IS_NUMBER_OVERFLOW_UV 5
2474 /* sv_2iuv_non_preserve(): private routine for use by sv_2iv() and sv_2uv() */
2476 /* For sv_2nv these three cases are "SvNOK and don't bother casting" */
2478 S_sv_2iuv_non_preserve(pTHX_ register SV *sv, I32 numtype)
2480 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));
2481 if (SvNVX(sv) < (NV)IV_MIN) {
2482 (void)SvIOKp_on(sv);
2485 return IS_NUMBER_UNDERFLOW_IV;
2487 if (SvNVX(sv) > (NV)UV_MAX) {
2488 (void)SvIOKp_on(sv);
2492 return IS_NUMBER_OVERFLOW_UV;
2494 (void)SvIOKp_on(sv);
2496 /* Can't use strtol etc to convert this string. (See truth table in
2498 if (SvNVX(sv) <= (UV)IV_MAX) {
2499 SvIVX(sv) = I_V(SvNVX(sv));
2500 if ((NV)(SvIVX(sv)) == SvNVX(sv)) {
2501 SvIOK_on(sv); /* Integer is precise. NOK, IOK */
2503 /* Integer is imprecise. NOK, IOKp */
2505 return SvNVX(sv) < 0 ? IS_NUMBER_UNDERFLOW_UV : IS_NUMBER_IV_AND_UV;
2508 SvUVX(sv) = U_V(SvNVX(sv));
2509 if ((NV)(SvUVX(sv)) == SvNVX(sv)) {
2510 if (SvUVX(sv) == UV_MAX) {
2511 /* As we know that NVs don't preserve UVs, UV_MAX cannot
2512 possibly be preserved by NV. Hence, it must be overflow.
2514 return IS_NUMBER_OVERFLOW_UV;
2516 SvIOK_on(sv); /* Integer is precise. NOK, UOK */
2518 /* Integer is imprecise. NOK, IOKp */
2520 return IS_NUMBER_OVERFLOW_IV;
2522 #endif /* !NV_PRESERVES_UV*/
2524 /* sv_2iv() is now a macro using Perl_sv_2iv_flags();
2525 * this function provided for binary compatibility only
2529 Perl_sv_2iv(pTHX_ register SV *sv)
2531 return sv_2iv_flags(sv, SV_GMAGIC);
2535 =for apidoc sv_2iv_flags
2537 Return the integer value of an SV, doing any necessary string
2538 conversion. If flags includes SV_GMAGIC, does an mg_get() first.
2539 Normally used via the C<SvIV(sv)> and C<SvIVx(sv)> macros.
2545 Perl_sv_2iv_flags(pTHX_ register SV *sv, I32 flags)
2549 if (SvGMAGICAL(sv)) {
2550 if (flags & SV_GMAGIC)
2555 return I_V(SvNVX(sv));
2557 if (SvPOKp(sv) && SvLEN(sv))
2560 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
2561 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
2567 if (SvTHINKFIRST(sv)) {
2570 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,numer)) &&
2571 (!SvROK(tmpstr) || (SvRV(tmpstr) != SvRV(sv))))
2572 return SvIV(tmpstr);
2573 return PTR2IV(SvRV(sv));
2576 sv_force_normal_flags(sv, 0);
2578 if (SvREADONLY(sv) && !SvOK(sv)) {
2579 if (ckWARN(WARN_UNINITIALIZED))
2586 return (IV)(SvUVX(sv));
2593 /* erm. not sure. *should* never get NOKp (without NOK) from sv_2nv
2594 * without also getting a cached IV/UV from it at the same time
2595 * (ie PV->NV conversion should detect loss of accuracy and cache
2596 * IV or UV at same time to avoid this. NWC */
2598 if (SvTYPE(sv) == SVt_NV)
2599 sv_upgrade(sv, SVt_PVNV);
2601 (void)SvIOKp_on(sv); /* Must do this first, to clear any SvOOK */
2602 /* < not <= as for NV doesn't preserve UV, ((NV)IV_MAX+1) will almost
2603 certainly cast into the IV range at IV_MAX, whereas the correct
2604 answer is the UV IV_MAX +1. Hence < ensures that dodgy boundary
2606 if (SvNVX(sv) < (NV)IV_MAX + 0.5) {
2607 SvIVX(sv) = I_V(SvNVX(sv));
2608 if (SvNVX(sv) == (NV) SvIVX(sv)
2609 #ifndef NV_PRESERVES_UV
2610 && (((UV)1 << NV_PRESERVES_UV_BITS) >
2611 (UV)(SvIVX(sv) > 0 ? SvIVX(sv) : -SvIVX(sv)))
2612 /* Don't flag it as "accurately an integer" if the number
2613 came from a (by definition imprecise) NV operation, and
2614 we're outside the range of NV integer precision */
2617 SvIOK_on(sv); /* Can this go wrong with rounding? NWC */
2618 DEBUG_c(PerlIO_printf(Perl_debug_log,
2619 "0x%"UVxf" iv(%"NVgf" => %"IVdf") (precise)\n",
2625 /* IV not precise. No need to convert from PV, as NV
2626 conversion would already have cached IV if it detected
2627 that PV->IV would be better than PV->NV->IV
2628 flags already correct - don't set public IOK. */
2629 DEBUG_c(PerlIO_printf(Perl_debug_log,
2630 "0x%"UVxf" iv(%"NVgf" => %"IVdf") (imprecise)\n",
2635 /* Can the above go wrong if SvIVX == IV_MIN and SvNVX < IV_MIN,
2636 but the cast (NV)IV_MIN rounds to a the value less (more
2637 negative) than IV_MIN which happens to be equal to SvNVX ??
2638 Analogous to 0xFFFFFFFFFFFFFFFF rounding up to NV (2**64) and
2639 NV rounding back to 0xFFFFFFFFFFFFFFFF, so UVX == UV(NVX) and
2640 (NV)UVX == NVX are both true, but the values differ. :-(
2641 Hopefully for 2s complement IV_MIN is something like
2642 0x8000000000000000 which will be exact. NWC */
2645 SvUVX(sv) = U_V(SvNVX(sv));
2647 (SvNVX(sv) == (NV) SvUVX(sv))
2648 #ifndef NV_PRESERVES_UV
2649 /* Make sure it's not 0xFFFFFFFFFFFFFFFF */
2650 /*&& (SvUVX(sv) != UV_MAX) irrelevant with code below */
2651 && (((UV)1 << NV_PRESERVES_UV_BITS) > SvUVX(sv))
2652 /* Don't flag it as "accurately an integer" if the number
2653 came from a (by definition imprecise) NV operation, and
2654 we're outside the range of NV integer precision */
2660 DEBUG_c(PerlIO_printf(Perl_debug_log,
2661 "0x%"UVxf" 2iv(%"UVuf" => %"IVdf") (as unsigned)\n",
2665 return (IV)SvUVX(sv);
2668 else if (SvPOKp(sv) && SvLEN(sv)) {
2670 int numtype = grok_number(SvPVX(sv), SvCUR(sv), &value);
2671 /* We want to avoid a possible problem when we cache an IV which
2672 may be later translated to an NV, and the resulting NV is not
2673 the same as the direct translation of the initial string
2674 (eg 123.456 can shortcut to the IV 123 with atol(), but we must
2675 be careful to ensure that the value with the .456 is around if the
2676 NV value is requested in the future).
2678 This means that if we cache such an IV, we need to cache the
2679 NV as well. Moreover, we trade speed for space, and do not
2680 cache the NV if we are sure it's not needed.
2683 /* SVt_PVNV is one higher than SVt_PVIV, hence this order */
2684 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2685 == IS_NUMBER_IN_UV) {
2686 /* It's definitely an integer, only upgrade to PVIV */
2687 if (SvTYPE(sv) < SVt_PVIV)
2688 sv_upgrade(sv, SVt_PVIV);
2690 } else if (SvTYPE(sv) < SVt_PVNV)
2691 sv_upgrade(sv, SVt_PVNV);
2693 /* If NV preserves UV then we only use the UV value if we know that
2694 we aren't going to call atof() below. If NVs don't preserve UVs
2695 then the value returned may have more precision than atof() will
2696 return, even though value isn't perfectly accurate. */
2697 if ((numtype & (IS_NUMBER_IN_UV
2698 #ifdef NV_PRESERVES_UV
2701 )) == IS_NUMBER_IN_UV) {
2702 /* This won't turn off the public IOK flag if it was set above */
2703 (void)SvIOKp_on(sv);
2705 if (!(numtype & IS_NUMBER_NEG)) {
2707 if (value <= (UV)IV_MAX) {
2708 SvIVX(sv) = (IV)value;
2714 /* 2s complement assumption */
2715 if (value <= (UV)IV_MIN) {
2716 SvIVX(sv) = -(IV)value;
2718 /* Too negative for an IV. This is a double upgrade, but
2719 I'm assuming it will be rare. */
2720 if (SvTYPE(sv) < SVt_PVNV)
2721 sv_upgrade(sv, SVt_PVNV);
2725 SvNVX(sv) = -(NV)value;
2730 /* For !NV_PRESERVES_UV and IS_NUMBER_IN_UV and IS_NUMBER_NOT_INT we
2731 will be in the previous block to set the IV slot, and the next
2732 block to set the NV slot. So no else here. */
2734 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2735 != IS_NUMBER_IN_UV) {
2736 /* It wasn't an (integer that doesn't overflow the UV). */
2737 SvNVX(sv) = Atof(SvPVX(sv));
2739 if (! numtype && ckWARN(WARN_NUMERIC))
2742 #if defined(USE_LONG_DOUBLE)
2743 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2iv(%" PERL_PRIgldbl ")\n",
2744 PTR2UV(sv), SvNVX(sv)));
2746 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2iv(%"NVgf")\n",
2747 PTR2UV(sv), SvNVX(sv)));
2751 #ifdef NV_PRESERVES_UV
2752 (void)SvIOKp_on(sv);
2754 if (SvNVX(sv) < (NV)IV_MAX + 0.5) {
2755 SvIVX(sv) = I_V(SvNVX(sv));
2756 if ((NV)(SvIVX(sv)) == SvNVX(sv)) {
2759 /* Integer is imprecise. NOK, IOKp */
2761 /* UV will not work better than IV */
2763 if (SvNVX(sv) > (NV)UV_MAX) {
2765 /* Integer is inaccurate. NOK, IOKp, is UV */
2769 SvUVX(sv) = U_V(SvNVX(sv));
2770 /* 0xFFFFFFFFFFFFFFFF not an issue in here */
2771 if ((NV)(SvUVX(sv)) == SvNVX(sv)) {
2775 /* Integer is imprecise. NOK, IOKp, is UV */
2781 #else /* NV_PRESERVES_UV */
2782 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2783 == (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT)) {
2784 /* The IV slot will have been set from value returned by
2785 grok_number above. The NV slot has just been set using
2788 assert (SvIOKp(sv));
2790 if (((UV)1 << NV_PRESERVES_UV_BITS) >
2791 U_V(SvNVX(sv) > 0 ? SvNVX(sv) : -SvNVX(sv))) {
2792 /* Small enough to preserve all bits. */
2793 (void)SvIOKp_on(sv);
2795 SvIVX(sv) = I_V(SvNVX(sv));
2796 if ((NV)(SvIVX(sv)) == SvNVX(sv))
2798 /* Assumption: first non-preserved integer is < IV_MAX,
2799 this NV is in the preserved range, therefore: */
2800 if (!(U_V(SvNVX(sv) > 0 ? SvNVX(sv) : -SvNVX(sv))
2802 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);
2806 0 0 already failed to read UV.
2807 0 1 already failed to read UV.
2808 1 0 you won't get here in this case. IV/UV
2809 slot set, public IOK, Atof() unneeded.
2810 1 1 already read UV.
2811 so there's no point in sv_2iuv_non_preserve() attempting
2812 to use atol, strtol, strtoul etc. */
2813 if (sv_2iuv_non_preserve (sv, numtype)
2814 >= IS_NUMBER_OVERFLOW_IV)
2818 #endif /* NV_PRESERVES_UV */
2821 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP))
2823 if (SvTYPE(sv) < SVt_IV)
2824 /* Typically the caller expects that sv_any is not NULL now. */
2825 sv_upgrade(sv, SVt_IV);
2828 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2iv(%"IVdf")\n",
2829 PTR2UV(sv),SvIVX(sv)));
2830 return SvIsUV(sv) ? (IV)SvUVX(sv) : SvIVX(sv);
2833 /* sv_2uv() is now a macro using Perl_sv_2uv_flags();
2834 * this function provided for binary compatibility only
2838 Perl_sv_2uv(pTHX_ register SV *sv)
2840 return sv_2uv_flags(sv, SV_GMAGIC);
2844 =for apidoc sv_2uv_flags
2846 Return the unsigned integer value of an SV, doing any necessary string
2847 conversion. If flags includes SV_GMAGIC, does an mg_get() first.
2848 Normally used via the C<SvUV(sv)> and C<SvUVx(sv)> macros.
2854 Perl_sv_2uv_flags(pTHX_ register SV *sv, I32 flags)
2858 if (SvGMAGICAL(sv)) {
2859 if (flags & SV_GMAGIC)
2864 return U_V(SvNVX(sv));
2865 if (SvPOKp(sv) && SvLEN(sv))
2868 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
2869 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
2875 if (SvTHINKFIRST(sv)) {
2878 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,numer)) &&
2879 (!SvROK(tmpstr) || (SvRV(tmpstr) != SvRV(sv))))
2880 return SvUV(tmpstr);
2881 return PTR2UV(SvRV(sv));
2884 sv_force_normal_flags(sv, 0);
2886 if (SvREADONLY(sv) && !SvOK(sv)) {
2887 if (ckWARN(WARN_UNINITIALIZED))
2897 return (UV)SvIVX(sv);
2901 /* erm. not sure. *should* never get NOKp (without NOK) from sv_2nv
2902 * without also getting a cached IV/UV from it at the same time
2903 * (ie PV->NV conversion should detect loss of accuracy and cache
2904 * IV or UV at same time to avoid this. */
2905 /* IV-over-UV optimisation - choose to cache IV if possible */
2907 if (SvTYPE(sv) == SVt_NV)
2908 sv_upgrade(sv, SVt_PVNV);
2910 (void)SvIOKp_on(sv); /* Must do this first, to clear any SvOOK */
2911 if (SvNVX(sv) < (NV)IV_MAX + 0.5) {
2912 SvIVX(sv) = I_V(SvNVX(sv));
2913 if (SvNVX(sv) == (NV) SvIVX(sv)
2914 #ifndef NV_PRESERVES_UV
2915 && (((UV)1 << NV_PRESERVES_UV_BITS) >
2916 (UV)(SvIVX(sv) > 0 ? SvIVX(sv) : -SvIVX(sv)))
2917 /* Don't flag it as "accurately an integer" if the number
2918 came from a (by definition imprecise) NV operation, and
2919 we're outside the range of NV integer precision */
2922 SvIOK_on(sv); /* Can this go wrong with rounding? NWC */
2923 DEBUG_c(PerlIO_printf(Perl_debug_log,
2924 "0x%"UVxf" uv(%"NVgf" => %"IVdf") (precise)\n",
2930 /* IV not precise. No need to convert from PV, as NV
2931 conversion would already have cached IV if it detected
2932 that PV->IV would be better than PV->NV->IV
2933 flags already correct - don't set public IOK. */
2934 DEBUG_c(PerlIO_printf(Perl_debug_log,
2935 "0x%"UVxf" uv(%"NVgf" => %"IVdf") (imprecise)\n",
2940 /* Can the above go wrong if SvIVX == IV_MIN and SvNVX < IV_MIN,
2941 but the cast (NV)IV_MIN rounds to a the value less (more
2942 negative) than IV_MIN which happens to be equal to SvNVX ??
2943 Analogous to 0xFFFFFFFFFFFFFFFF rounding up to NV (2**64) and
2944 NV rounding back to 0xFFFFFFFFFFFFFFFF, so UVX == UV(NVX) and
2945 (NV)UVX == NVX are both true, but the values differ. :-(
2946 Hopefully for 2s complement IV_MIN is something like
2947 0x8000000000000000 which will be exact. NWC */
2950 SvUVX(sv) = U_V(SvNVX(sv));
2952 (SvNVX(sv) == (NV) SvUVX(sv))
2953 #ifndef NV_PRESERVES_UV
2954 /* Make sure it's not 0xFFFFFFFFFFFFFFFF */
2955 /*&& (SvUVX(sv) != UV_MAX) irrelevant with code below */
2956 && (((UV)1 << NV_PRESERVES_UV_BITS) > SvUVX(sv))
2957 /* Don't flag it as "accurately an integer" if the number
2958 came from a (by definition imprecise) NV operation, and
2959 we're outside the range of NV integer precision */
2964 DEBUG_c(PerlIO_printf(Perl_debug_log,
2965 "0x%"UVxf" 2uv(%"UVuf" => %"IVdf") (as unsigned)\n",
2971 else if (SvPOKp(sv) && SvLEN(sv)) {
2973 int numtype = grok_number(SvPVX(sv), SvCUR(sv), &value);
2975 /* We want to avoid a possible problem when we cache a UV which
2976 may be later translated to an NV, and the resulting NV is not
2977 the translation of the initial data.
2979 This means that if we cache such a UV, we need to cache the
2980 NV as well. Moreover, we trade speed for space, and do not
2981 cache the NV if not needed.
2984 /* SVt_PVNV is one higher than SVt_PVIV, hence this order */
2985 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2986 == IS_NUMBER_IN_UV) {
2987 /* It's definitely an integer, only upgrade to PVIV */
2988 if (SvTYPE(sv) < SVt_PVIV)
2989 sv_upgrade(sv, SVt_PVIV);
2991 } else if (SvTYPE(sv) < SVt_PVNV)
2992 sv_upgrade(sv, SVt_PVNV);
2994 /* If NV preserves UV then we only use the UV value if we know that
2995 we aren't going to call atof() below. If NVs don't preserve UVs
2996 then the value returned may have more precision than atof() will
2997 return, even though it isn't accurate. */
2998 if ((numtype & (IS_NUMBER_IN_UV
2999 #ifdef NV_PRESERVES_UV
3002 )) == IS_NUMBER_IN_UV) {
3003 /* This won't turn off the public IOK flag if it was set above */
3004 (void)SvIOKp_on(sv);
3006 if (!(numtype & IS_NUMBER_NEG)) {
3008 if (value <= (UV)IV_MAX) {
3009 SvIVX(sv) = (IV)value;
3011 /* it didn't overflow, and it was positive. */
3016 /* 2s complement assumption */
3017 if (value <= (UV)IV_MIN) {
3018 SvIVX(sv) = -(IV)value;
3020 /* Too negative for an IV. This is a double upgrade, but
3021 I'm assuming it will be rare. */
3022 if (SvTYPE(sv) < SVt_PVNV)
3023 sv_upgrade(sv, SVt_PVNV);
3027 SvNVX(sv) = -(NV)value;
3033 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
3034 != IS_NUMBER_IN_UV) {
3035 /* It wasn't an integer, or it overflowed the UV. */
3036 SvNVX(sv) = Atof(SvPVX(sv));
3038 if (! numtype && ckWARN(WARN_NUMERIC))
3041 #if defined(USE_LONG_DOUBLE)
3042 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2uv(%" PERL_PRIgldbl ")\n",
3043 PTR2UV(sv), SvNVX(sv)));
3045 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2uv(%"NVgf")\n",
3046 PTR2UV(sv), SvNVX(sv)));
3049 #ifdef NV_PRESERVES_UV
3050 (void)SvIOKp_on(sv);
3052 if (SvNVX(sv) < (NV)IV_MAX + 0.5) {
3053 SvIVX(sv) = I_V(SvNVX(sv));
3054 if ((NV)(SvIVX(sv)) == SvNVX(sv)) {
3057 /* Integer is imprecise. NOK, IOKp */
3059 /* UV will not work better than IV */
3061 if (SvNVX(sv) > (NV)UV_MAX) {
3063 /* Integer is inaccurate. NOK, IOKp, is UV */
3067 SvUVX(sv) = U_V(SvNVX(sv));
3068 /* 0xFFFFFFFFFFFFFFFF not an issue in here, NVs
3069 NV preservse UV so can do correct comparison. */
3070 if ((NV)(SvUVX(sv)) == SvNVX(sv)) {
3074 /* Integer is imprecise. NOK, IOKp, is UV */
3079 #else /* NV_PRESERVES_UV */
3080 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
3081 == (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT)) {
3082 /* The UV slot will have been set from value returned by
3083 grok_number above. The NV slot has just been set using
3086 assert (SvIOKp(sv));
3088 if (((UV)1 << NV_PRESERVES_UV_BITS) >
3089 U_V(SvNVX(sv) > 0 ? SvNVX(sv) : -SvNVX(sv))) {
3090 /* Small enough to preserve all bits. */
3091 (void)SvIOKp_on(sv);
3093 SvIVX(sv) = I_V(SvNVX(sv));
3094 if ((NV)(SvIVX(sv)) == SvNVX(sv))
3096 /* Assumption: first non-preserved integer is < IV_MAX,
3097 this NV is in the preserved range, therefore: */
3098 if (!(U_V(SvNVX(sv) > 0 ? SvNVX(sv) : -SvNVX(sv))
3100 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);
3103 sv_2iuv_non_preserve (sv, numtype);
3105 #endif /* NV_PRESERVES_UV */
3109 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
3110 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
3113 if (SvTYPE(sv) < SVt_IV)
3114 /* Typically the caller expects that sv_any is not NULL now. */
3115 sv_upgrade(sv, SVt_IV);
3119 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2uv(%"UVuf")\n",
3120 PTR2UV(sv),SvUVX(sv)));
3121 return SvIsUV(sv) ? SvUVX(sv) : (UV)SvIVX(sv);
3127 Return the num value of an SV, doing any necessary string or integer
3128 conversion, magic etc. Normally used via the C<SvNV(sv)> and C<SvNVx(sv)>
3135 Perl_sv_2nv(pTHX_ register SV *sv)
3139 if (SvGMAGICAL(sv)) {
3143 if (SvPOKp(sv) && SvLEN(sv)) {
3144 if (ckWARN(WARN_NUMERIC) && !SvIOKp(sv) &&
3145 !grok_number(SvPVX(sv), SvCUR(sv), NULL))
3147 return Atof(SvPVX(sv));
3151 return (NV)SvUVX(sv);
3153 return (NV)SvIVX(sv);
3156 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
3157 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
3163 if (SvTHINKFIRST(sv)) {
3166 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,numer)) &&
3167 (!SvROK(tmpstr) || (SvRV(tmpstr) != SvRV(sv))))
3168 return SvNV(tmpstr);
3169 return PTR2NV(SvRV(sv));
3172 sv_force_normal_flags(sv, 0);
3174 if (SvREADONLY(sv) && !SvOK(sv)) {
3175 if (ckWARN(WARN_UNINITIALIZED))
3180 if (SvTYPE(sv) < SVt_NV) {
3181 if (SvTYPE(sv) == SVt_IV)
3182 sv_upgrade(sv, SVt_PVNV);
3184 sv_upgrade(sv, SVt_NV);
3185 #ifdef USE_LONG_DOUBLE
3187 STORE_NUMERIC_LOCAL_SET_STANDARD();
3188 PerlIO_printf(Perl_debug_log,
3189 "0x%"UVxf" num(%" PERL_PRIgldbl ")\n",
3190 PTR2UV(sv), SvNVX(sv));
3191 RESTORE_NUMERIC_LOCAL();
3195 STORE_NUMERIC_LOCAL_SET_STANDARD();
3196 PerlIO_printf(Perl_debug_log, "0x%"UVxf" num(%"NVgf")\n",
3197 PTR2UV(sv), SvNVX(sv));
3198 RESTORE_NUMERIC_LOCAL();
3202 else if (SvTYPE(sv) < SVt_PVNV)
3203 sv_upgrade(sv, SVt_PVNV);
3208 SvNVX(sv) = SvIsUV(sv) ? (NV)SvUVX(sv) : (NV)SvIVX(sv);
3209 #ifdef NV_PRESERVES_UV
3212 /* Only set the public NV OK flag if this NV preserves the IV */
3213 /* Check it's not 0xFFFFFFFFFFFFFFFF */
3214 if (SvIsUV(sv) ? ((SvUVX(sv) != UV_MAX)&&(SvUVX(sv) == U_V(SvNVX(sv))))
3215 : (SvIVX(sv) == I_V(SvNVX(sv))))
3221 else if (SvPOKp(sv) && SvLEN(sv)) {
3223 int numtype = grok_number(SvPVX(sv), SvCUR(sv), &value);
3224 if (ckWARN(WARN_NUMERIC) && !SvIOKp(sv) && !numtype)
3226 #ifdef NV_PRESERVES_UV
3227 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
3228 == IS_NUMBER_IN_UV) {
3229 /* It's definitely an integer */
3230 SvNVX(sv) = (numtype & IS_NUMBER_NEG) ? -(NV)value : (NV)value;
3232 SvNVX(sv) = Atof(SvPVX(sv));
3235 SvNVX(sv) = Atof(SvPVX(sv));
3236 /* Only set the public NV OK flag if this NV preserves the value in
3237 the PV at least as well as an IV/UV would.
3238 Not sure how to do this 100% reliably. */
3239 /* if that shift count is out of range then Configure's test is
3240 wonky. We shouldn't be in here with NV_PRESERVES_UV_BITS ==
3242 if (((UV)1 << NV_PRESERVES_UV_BITS) >
3243 U_V(SvNVX(sv) > 0 ? SvNVX(sv) : -SvNVX(sv))) {
3244 SvNOK_on(sv); /* Definitely small enough to preserve all bits */
3245 } else if (!(numtype & IS_NUMBER_IN_UV)) {
3246 /* Can't use strtol etc to convert this string, so don't try.
3247 sv_2iv and sv_2uv will use the NV to convert, not the PV. */
3250 /* value has been set. It may not be precise. */
3251 if ((numtype & IS_NUMBER_NEG) && (value > (UV)IV_MIN)) {
3252 /* 2s complement assumption for (UV)IV_MIN */
3253 SvNOK_on(sv); /* Integer is too negative. */
3258 if (numtype & IS_NUMBER_NEG) {
3259 SvIVX(sv) = -(IV)value;
3260 } else if (value <= (UV)IV_MAX) {
3261 SvIVX(sv) = (IV)value;
3267 if (numtype & IS_NUMBER_NOT_INT) {
3268 /* I believe that even if the original PV had decimals,
3269 they are lost beyond the limit of the FP precision.
3270 However, neither is canonical, so both only get p
3271 flags. NWC, 2000/11/25 */
3272 /* Both already have p flags, so do nothing */
3275 if (SvNVX(sv) < (NV)IV_MAX + 0.5) {
3276 if (SvIVX(sv) == I_V(nv)) {
3281 /* It had no "." so it must be integer. */
3284 /* between IV_MAX and NV(UV_MAX).
3285 Could be slightly > UV_MAX */
3287 if (numtype & IS_NUMBER_NOT_INT) {
3288 /* UV and NV both imprecise. */
3290 UV nv_as_uv = U_V(nv);
3292 if (value == nv_as_uv && SvUVX(sv) != UV_MAX) {
3303 #endif /* NV_PRESERVES_UV */
3306 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP))
3308 if (SvTYPE(sv) < SVt_NV)
3309 /* Typically the caller expects that sv_any is not NULL now. */
3310 /* XXX Ilya implies that this is a bug in callers that assume this
3311 and ideally should be fixed. */
3312 sv_upgrade(sv, SVt_NV);
3315 #if defined(USE_LONG_DOUBLE)
3317 STORE_NUMERIC_LOCAL_SET_STANDARD();
3318 PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2nv(%" PERL_PRIgldbl ")\n",
3319 PTR2UV(sv), SvNVX(sv));
3320 RESTORE_NUMERIC_LOCAL();
3324 STORE_NUMERIC_LOCAL_SET_STANDARD();
3325 PerlIO_printf(Perl_debug_log, "0x%"UVxf" 1nv(%"NVgf")\n",
3326 PTR2UV(sv), SvNVX(sv));
3327 RESTORE_NUMERIC_LOCAL();
3333 /* asIV(): extract an integer from the string value of an SV.
3334 * Caller must validate PVX */
3337 S_asIV(pTHX_ SV *sv)
3340 int numtype = grok_number(SvPVX(sv), SvCUR(sv), &value);
3342 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
3343 == IS_NUMBER_IN_UV) {
3344 /* It's definitely an integer */
3345 if (numtype & IS_NUMBER_NEG) {
3346 if (value < (UV)IV_MIN)
3349 if (value < (UV)IV_MAX)
3354 if (ckWARN(WARN_NUMERIC))
3357 return I_V(Atof(SvPVX(sv)));
3360 /* asUV(): extract an unsigned integer from the string value of an SV
3361 * Caller must validate PVX */
3364 S_asUV(pTHX_ SV *sv)
3367 int numtype = grok_number(SvPVX(sv), SvCUR(sv), &value);
3369 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
3370 == IS_NUMBER_IN_UV) {
3371 /* It's definitely an integer */
3372 if (!(numtype & IS_NUMBER_NEG))
3376 if (ckWARN(WARN_NUMERIC))
3379 return U_V(Atof(SvPVX(sv)));
3383 =for apidoc sv_2pv_nolen
3385 Like C<sv_2pv()>, but doesn't return the length too. You should usually
3386 use the macro wrapper C<SvPV_nolen(sv)> instead.
3391 Perl_sv_2pv_nolen(pTHX_ register SV *sv)
3394 return sv_2pv(sv, &n_a);
3397 /* uiv_2buf(): private routine for use by sv_2pv_flags(): print an IV or
3398 * UV as a string towards the end of buf, and return pointers to start and
3401 * We assume that buf is at least TYPE_CHARS(UV) long.
3405 uiv_2buf(char *buf, IV iv, UV uv, int is_uv, char **peob)
3407 char *ptr = buf + TYPE_CHARS(UV);
3421 *--ptr = '0' + (char)(uv % 10);
3429 /* sv_2pv() is now a macro using Perl_sv_2pv_flags();
3430 * this function provided for binary compatibility only
3434 Perl_sv_2pv(pTHX_ register SV *sv, STRLEN *lp)
3436 return sv_2pv_flags(sv, lp, SV_GMAGIC);
3440 =for apidoc sv_2pv_flags
3442 Returns a pointer to the string value of an SV, and sets *lp to its length.
3443 If flags includes SV_GMAGIC, does an mg_get() first. Coerces sv to a string
3445 Normally invoked via the C<SvPV_flags> macro. C<sv_2pv()> and C<sv_2pv_nomg>
3446 usually end up here too.
3452 Perl_sv_2pv_flags(pTHX_ register SV *sv, STRLEN *lp, I32 flags)
3457 char tbuf[64]; /* Must fit sprintf/Gconvert of longest IV/NV */
3458 char *tmpbuf = tbuf;
3464 if (SvGMAGICAL(sv)) {
3465 if (flags & SV_GMAGIC)
3473 (void)sprintf(tmpbuf,"%"UVuf, (UV)SvUVX(sv));
3475 (void)sprintf(tmpbuf,"%"IVdf, (IV)SvIVX(sv));
3480 Gconvert(SvNVX(sv), NV_DIG, 0, tmpbuf);
3485 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
3486 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
3493 if (SvTHINKFIRST(sv)) {
3496 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,string)) &&
3497 (!SvROK(tmpstr) || (SvRV(tmpstr) != SvRV(sv)))) {
3498 char *pv = SvPV(tmpstr, *lp);
3512 switch (SvTYPE(sv)) {
3514 if ( ((SvFLAGS(sv) &
3515 (SVs_OBJECT|SVf_OK|SVs_GMG|SVs_SMG|SVs_RMG))
3516 == (SVs_OBJECT|SVs_SMG))
3517 && (mg = mg_find(sv, PERL_MAGIC_qr))) {
3518 regexp *re = (regexp *)mg->mg_obj;
3521 char *fptr = "msix";
3526 char need_newline = 0;
3527 U16 reganch = (U16)((re->reganch & PMf_COMPILETIME) >> 12);
3529 while((ch = *fptr++)) {
3531 reflags[left++] = ch;
3534 reflags[right--] = ch;
3539 reflags[left] = '-';
3543 mg->mg_len = re->prelen + 4 + left;
3545 * If /x was used, we have to worry about a regex
3546 * ending with a comment later being embedded
3547 * within another regex. If so, we don't want this
3548 * regex's "commentization" to leak out to the
3549 * right part of the enclosing regex, we must cap
3550 * it with a newline.
3552 * So, if /x was used, we scan backwards from the
3553 * end of the regex. If we find a '#' before we
3554 * find a newline, we need to add a newline
3555 * ourself. If we find a '\n' first (or if we
3556 * don't find '#' or '\n'), we don't need to add
3557 * anything. -jfriedl
3559 if (PMf_EXTENDED & re->reganch)
3561 char *endptr = re->precomp + re->prelen;
3562 while (endptr >= re->precomp)
3564 char c = *(endptr--);
3566 break; /* don't need another */
3568 /* we end while in a comment, so we
3570 mg->mg_len++; /* save space for it */
3571 need_newline = 1; /* note to add it */
3577 New(616, mg->mg_ptr, mg->mg_len + 1 + left, char);
3578 Copy("(?", mg->mg_ptr, 2, char);
3579 Copy(reflags, mg->mg_ptr+2, left, char);
3580 Copy(":", mg->mg_ptr+left+2, 1, char);
3581 Copy(re->precomp, mg->mg_ptr+3+left, re->prelen, char);
3583 mg->mg_ptr[mg->mg_len - 2] = '\n';
3584 mg->mg_ptr[mg->mg_len - 1] = ')';
3585 mg->mg_ptr[mg->mg_len] = 0;
3587 PL_reginterp_cnt += re->program[0].next_off;
3589 if (re->reganch & ROPT_UTF8)
3604 case SVt_PVBM: if (SvROK(sv))
3607 s = "SCALAR"; break;
3608 case SVt_PVLV: s = SvROK(sv) ? "REF"
3609 /* tied lvalues should appear to be
3610 * scalars for backwards compatitbility */
3611 : (LvTYPE(sv) == 't' || LvTYPE(sv) == 'T')
3612 ? "SCALAR" : "LVALUE"; break;
3613 case SVt_PVAV: s = "ARRAY"; break;
3614 case SVt_PVHV: s = "HASH"; break;
3615 case SVt_PVCV: s = "CODE"; break;
3616 case SVt_PVGV: s = "GLOB"; break;
3617 case SVt_PVFM: s = "FORMAT"; break;
3618 case SVt_PVIO: s = "IO"; break;
3619 default: s = "UNKNOWN"; break;
3623 if (HvNAME(SvSTASH(sv)))
3624 Perl_sv_setpvf(aTHX_ tsv, "%s=%s", HvNAME(SvSTASH(sv)), s);
3626 Perl_sv_setpvf(aTHX_ tsv, "__ANON__=%s", s);
3629 Perl_sv_catpvf(aTHX_ tsv, "(0x%"UVxf")", 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. C<sv_setsv> and C<sv_setsv_nomg> are
4133 implemented in terms of this function.
4135 You probably want to use one of the assortment of wrappers, such as
4136 C<SvSetSV>, C<SvSetSV_nosteal>, C<SvSetMagicSV> and
4137 C<SvSetMagicSV_nosteal>.
4139 This is the primary function for copying scalars, and most other
4140 copy-ish functions and macros use this underneath.
4146 Perl_sv_setsv_flags(pTHX_ SV *dstr, register SV *sstr, I32 flags)
4148 register U32 sflags;
4154 SV_CHECK_THINKFIRST_COW_DROP(dstr);
4156 sstr = &PL_sv_undef;
4157 stype = SvTYPE(sstr);
4158 dtype = SvTYPE(dstr);
4163 /* need to nuke the magic */
4165 SvRMAGICAL_off(dstr);
4168 /* There's a lot of redundancy below but we're going for speed here */
4173 if (dtype != SVt_PVGV) {
4174 (void)SvOK_off(dstr);
4182 sv_upgrade(dstr, SVt_IV);
4185 sv_upgrade(dstr, SVt_PVNV);
4189 sv_upgrade(dstr, SVt_PVIV);
4192 (void)SvIOK_only(dstr);
4193 SvIVX(dstr) = SvIVX(sstr);
4196 if (SvTAINTED(sstr))
4207 sv_upgrade(dstr, SVt_NV);
4212 sv_upgrade(dstr, SVt_PVNV);
4215 SvNVX(dstr) = SvNVX(sstr);
4216 (void)SvNOK_only(dstr);
4217 if (SvTAINTED(sstr))
4225 sv_upgrade(dstr, SVt_RV);
4226 else if (dtype == SVt_PVGV &&
4227 SvROK(sstr) && SvTYPE(SvRV(sstr)) == SVt_PVGV) {
4230 if (GvIMPORTED(dstr) != GVf_IMPORTED
4231 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
4233 GvIMPORTED_on(dstr);
4242 #ifdef PERL_COPY_ON_WRITE
4243 if ((SvFLAGS(sstr) & CAN_COW_MASK) == CAN_COW_FLAGS) {
4244 if (dtype < SVt_PVIV)
4245 sv_upgrade(dstr, SVt_PVIV);
4252 sv_upgrade(dstr, SVt_PV);
4255 if (dtype < SVt_PVIV)
4256 sv_upgrade(dstr, SVt_PVIV);
4259 if (dtype < SVt_PVNV)
4260 sv_upgrade(dstr, SVt_PVNV);
4267 Perl_croak(aTHX_ "Bizarre copy of %s in %s", sv_reftype(sstr, 0),
4270 Perl_croak(aTHX_ "Bizarre copy of %s", sv_reftype(sstr, 0));
4274 if (dtype <= SVt_PVGV) {
4276 if (dtype != SVt_PVGV) {
4277 char *name = GvNAME(sstr);
4278 STRLEN len = GvNAMELEN(sstr);
4279 /* don't upgrade SVt_PVLV: it can hold a glob */
4280 if (dtype != SVt_PVLV)
4281 sv_upgrade(dstr, SVt_PVGV);
4282 sv_magic(dstr, dstr, PERL_MAGIC_glob, Nullch, 0);
4283 GvSTASH(dstr) = (HV*)SvREFCNT_inc(GvSTASH(sstr));
4284 GvNAME(dstr) = savepvn(name, len);
4285 GvNAMELEN(dstr) = len;
4286 SvFAKE_on(dstr); /* can coerce to non-glob */
4288 /* ahem, death to those who redefine active sort subs */
4289 else if (PL_curstackinfo->si_type == PERLSI_SORT
4290 && GvCV(dstr) && PL_sortcop == CvSTART(GvCV(dstr)))
4291 Perl_croak(aTHX_ "Can't redefine active sort subroutine %s",
4294 #ifdef GV_UNIQUE_CHECK
4295 if (GvUNIQUE((GV*)dstr)) {
4296 Perl_croak(aTHX_ PL_no_modify);
4300 (void)SvOK_off(dstr);
4301 GvINTRO_off(dstr); /* one-shot flag */
4303 GvGP(dstr) = gp_ref(GvGP(sstr));
4304 if (SvTAINTED(sstr))
4306 if (GvIMPORTED(dstr) != GVf_IMPORTED
4307 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
4309 GvIMPORTED_on(dstr);
4317 if (SvGMAGICAL(sstr) && (flags & SV_GMAGIC)) {
4319 if ((int)SvTYPE(sstr) != stype) {
4320 stype = SvTYPE(sstr);
4321 if (stype == SVt_PVGV && dtype <= SVt_PVGV)
4325 if (stype == SVt_PVLV)
4326 (void)SvUPGRADE(dstr, SVt_PVNV);
4328 (void)SvUPGRADE(dstr, (U32)stype);
4331 sflags = SvFLAGS(sstr);
4333 if (sflags & SVf_ROK) {
4334 if (dtype >= SVt_PV) {
4335 if (dtype == SVt_PVGV) {
4336 SV *sref = SvREFCNT_inc(SvRV(sstr));
4338 int intro = GvINTRO(dstr);
4340 #ifdef GV_UNIQUE_CHECK
4341 if (GvUNIQUE((GV*)dstr)) {
4342 Perl_croak(aTHX_ PL_no_modify);
4347 GvINTRO_off(dstr); /* one-shot flag */
4348 GvLINE(dstr) = CopLINE(PL_curcop);
4349 GvEGV(dstr) = (GV*)dstr;
4352 switch (SvTYPE(sref)) {
4355 SAVEGENERICSV(GvAV(dstr));
4357 dref = (SV*)GvAV(dstr);
4358 GvAV(dstr) = (AV*)sref;
4359 if (!GvIMPORTED_AV(dstr)
4360 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
4362 GvIMPORTED_AV_on(dstr);
4367 SAVEGENERICSV(GvHV(dstr));
4369 dref = (SV*)GvHV(dstr);
4370 GvHV(dstr) = (HV*)sref;
4371 if (!GvIMPORTED_HV(dstr)
4372 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
4374 GvIMPORTED_HV_on(dstr);
4379 if (GvCVGEN(dstr) && GvCV(dstr) != (CV*)sref) {
4380 SvREFCNT_dec(GvCV(dstr));
4381 GvCV(dstr) = Nullcv;
4382 GvCVGEN(dstr) = 0; /* Switch off cacheness. */
4383 PL_sub_generation++;
4385 SAVEGENERICSV(GvCV(dstr));
4388 dref = (SV*)GvCV(dstr);
4389 if (GvCV(dstr) != (CV*)sref) {
4390 CV* cv = GvCV(dstr);
4392 if (!GvCVGEN((GV*)dstr) &&
4393 (CvROOT(cv) || CvXSUB(cv)))
4395 /* ahem, death to those who redefine
4396 * active sort subs */
4397 if (PL_curstackinfo->si_type == PERLSI_SORT &&
4398 PL_sortcop == CvSTART(cv))
4400 "Can't redefine active sort subroutine %s",
4401 GvENAME((GV*)dstr));
4402 /* Redefining a sub - warning is mandatory if
4403 it was a const and its value changed. */
4404 if (ckWARN(WARN_REDEFINE)
4406 && (!CvCONST((CV*)sref)
4407 || sv_cmp(cv_const_sv(cv),
4408 cv_const_sv((CV*)sref)))))
4410 Perl_warner(aTHX_ packWARN(WARN_REDEFINE),
4412 ? "Constant subroutine %s::%s redefined"
4413 : "Subroutine %s::%s redefined",
4414 HvNAME(GvSTASH((GV*)dstr)),
4415 GvENAME((GV*)dstr));
4419 cv_ckproto(cv, (GV*)dstr,
4420 SvPOK(sref) ? SvPVX(sref) : Nullch);
4422 GvCV(dstr) = (CV*)sref;
4423 GvCVGEN(dstr) = 0; /* Switch off cacheness. */
4424 GvASSUMECV_on(dstr);
4425 PL_sub_generation++;
4427 if (!GvIMPORTED_CV(dstr)
4428 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
4430 GvIMPORTED_CV_on(dstr);
4435 SAVEGENERICSV(GvIOp(dstr));
4437 dref = (SV*)GvIOp(dstr);
4438 GvIOp(dstr) = (IO*)sref;
4442 SAVEGENERICSV(GvFORM(dstr));
4444 dref = (SV*)GvFORM(dstr);
4445 GvFORM(dstr) = (CV*)sref;
4449 SAVEGENERICSV(GvSV(dstr));
4451 dref = (SV*)GvSV(dstr);
4453 if (!GvIMPORTED_SV(dstr)
4454 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
4456 GvIMPORTED_SV_on(dstr);
4462 if (SvTAINTED(sstr))
4467 (void)SvOOK_off(dstr); /* backoff */
4469 Safefree(SvPVX(dstr));
4470 SvLEN(dstr)=SvCUR(dstr)=0;
4473 (void)SvOK_off(dstr);
4474 SvRV(dstr) = SvREFCNT_inc(SvRV(sstr));
4476 if (sflags & SVp_NOK) {
4478 /* Only set the public OK flag if the source has public OK. */
4479 if (sflags & SVf_NOK)
4480 SvFLAGS(dstr) |= SVf_NOK;
4481 SvNVX(dstr) = SvNVX(sstr);
4483 if (sflags & SVp_IOK) {
4484 (void)SvIOKp_on(dstr);
4485 if (sflags & SVf_IOK)
4486 SvFLAGS(dstr) |= SVf_IOK;
4487 if (sflags & SVf_IVisUV)
4489 SvIVX(dstr) = SvIVX(sstr);
4491 if (SvAMAGIC(sstr)) {
4495 else if (sflags & SVp_POK) {
4499 * Check to see if we can just swipe the string. If so, it's a
4500 * possible small lose on short strings, but a big win on long ones.
4501 * It might even be a win on short strings if SvPVX(dstr)
4502 * has to be allocated and SvPVX(sstr) has to be freed.
4505 /* Whichever path we take through the next code, we want this true,
4506 and doing it now facilitates the COW check. */
4507 (void)SvPOK_only(dstr);
4510 #ifdef PERL_COPY_ON_WRITE
4511 (sflags & (SVf_FAKE | SVf_READONLY)) != (SVf_FAKE | SVf_READONLY)
4515 (sflags & SVs_TEMP) && /* slated for free anyway? */
4516 !(sflags & SVf_OOK) && /* and not involved in OOK hack? */
4517 SvREFCNT(sstr) == 1 && /* and no other references to it? */
4518 SvLEN(sstr) && /* and really is a string */
4519 /* and won't be needed again, potentially */
4520 !(PL_op && PL_op->op_type == OP_AASSIGN))
4521 #ifdef PERL_COPY_ON_WRITE
4522 && !((sflags & CAN_COW_MASK) == CAN_COW_FLAGS
4523 && (SvFLAGS(dstr) & CAN_COW_MASK) == CAN_COW_FLAGS
4524 && SvTYPE(sstr) >= SVt_PVIV)
4527 /* Failed the swipe test, and it's not a shared hash key either.
4528 Have to copy the string. */
4529 STRLEN len = SvCUR(sstr);
4530 SvGROW(dstr, len + 1); /* inlined from sv_setpvn */
4531 Move(SvPVX(sstr),SvPVX(dstr),len,char);
4532 SvCUR_set(dstr, len);
4533 *SvEND(dstr) = '\0';
4535 /* If PERL_COPY_ON_WRITE is not defined, then isSwipe will always
4537 #ifdef PERL_COPY_ON_WRITE
4538 /* Either it's a shared hash key, or it's suitable for
4539 copy-on-write or we can swipe the string. */
4541 PerlIO_printf(Perl_debug_log, "Copy on write: sstr --> dstr\n");
4546 /* I believe I should acquire a global SV mutex if
4547 it's a COW sv (not a shared hash key) to stop
4548 it going un copy-on-write.
4549 If the source SV has gone un copy on write between up there
4550 and down here, then (assert() that) it is of the correct
4551 form to make it copy on write again */
4552 if ((sflags & (SVf_FAKE | SVf_READONLY))
4553 != (SVf_FAKE | SVf_READONLY)) {
4554 SvREADONLY_on(sstr);
4556 /* Make the source SV into a loop of 1.
4557 (about to become 2) */
4558 SV_COW_NEXT_SV_SET(sstr, sstr);
4562 /* Initial code is common. */
4563 if (SvPVX(dstr)) { /* we know that dtype >= SVt_PV */
4565 SvFLAGS(dstr) &= ~SVf_OOK;
4566 Safefree(SvPVX(dstr) - SvIVX(dstr));
4568 else if (SvLEN(dstr))
4569 Safefree(SvPVX(dstr));
4572 #ifdef PERL_COPY_ON_WRITE
4574 /* making another shared SV. */
4575 STRLEN cur = SvCUR(sstr);
4576 STRLEN len = SvLEN(sstr);
4577 assert (SvTYPE(dstr) >= SVt_PVIV);
4579 /* SvIsCOW_normal */
4580 /* splice us in between source and next-after-source. */
4581 SV_COW_NEXT_SV_SET(dstr, SV_COW_NEXT_SV(sstr));
4582 SV_COW_NEXT_SV_SET(sstr, dstr);
4583 SvPV_set(dstr, SvPVX(sstr));
4585 /* SvIsCOW_shared_hash */
4586 UV hash = SvUVX(sstr);
4587 DEBUG_C(PerlIO_printf(Perl_debug_log,
4588 "Copy on write: Sharing hash\n"));
4590 sharepvn(SvPVX(sstr),
4591 (sflags & SVf_UTF8?-cur:cur), hash));
4596 SvREADONLY_on(dstr);
4598 /* Relesase a global SV mutex. */
4602 { /* Passes the swipe test. */
4603 SvPV_set(dstr, SvPVX(sstr));
4604 SvLEN_set(dstr, SvLEN(sstr));
4605 SvCUR_set(dstr, SvCUR(sstr));
4608 (void)SvOK_off(sstr); /* NOTE: nukes most SvFLAGS on sstr */
4609 SvPV_set(sstr, Nullch);
4615 if (sflags & SVf_UTF8)
4618 if (sflags & SVp_NOK) {
4620 if (sflags & SVf_NOK)
4621 SvFLAGS(dstr) |= SVf_NOK;
4622 SvNVX(dstr) = SvNVX(sstr);
4624 if (sflags & SVp_IOK) {
4625 (void)SvIOKp_on(dstr);
4626 if (sflags & SVf_IOK)
4627 SvFLAGS(dstr) |= SVf_IOK;
4628 if (sflags & SVf_IVisUV)
4630 SvIVX(dstr) = SvIVX(sstr);
4633 MAGIC *smg = mg_find(sstr,PERL_MAGIC_vstring);
4634 sv_magic(dstr, NULL, PERL_MAGIC_vstring,
4635 smg->mg_ptr, smg->mg_len);
4636 SvRMAGICAL_on(dstr);
4639 else if (sflags & SVp_IOK) {
4640 if (sflags & SVf_IOK)
4641 (void)SvIOK_only(dstr);
4643 (void)SvOK_off(dstr);
4644 (void)SvIOKp_on(dstr);
4646 /* XXXX Do we want to set IsUV for IV(ROK)? Be extra safe... */
4647 if (sflags & SVf_IVisUV)
4649 SvIVX(dstr) = SvIVX(sstr);
4650 if (sflags & SVp_NOK) {
4651 if (sflags & SVf_NOK)
4652 (void)SvNOK_on(dstr);
4654 (void)SvNOKp_on(dstr);
4655 SvNVX(dstr) = SvNVX(sstr);
4658 else if (sflags & SVp_NOK) {
4659 if (sflags & SVf_NOK)
4660 (void)SvNOK_only(dstr);
4662 (void)SvOK_off(dstr);
4665 SvNVX(dstr) = SvNVX(sstr);
4668 if (dtype == SVt_PVGV) {
4669 if (ckWARN(WARN_MISC))
4670 Perl_warner(aTHX_ packWARN(WARN_MISC), "Undefined value assigned to typeglob");
4673 (void)SvOK_off(dstr);
4675 if (SvTAINTED(sstr))
4680 =for apidoc sv_setsv_mg
4682 Like C<sv_setsv>, but also handles 'set' magic.
4688 Perl_sv_setsv_mg(pTHX_ SV *dstr, register SV *sstr)
4690 sv_setsv(dstr,sstr);
4694 #ifdef PERL_COPY_ON_WRITE
4696 Perl_sv_setsv_cow(pTHX_ SV *dstr, SV *sstr)
4698 STRLEN cur = SvCUR(sstr);
4699 STRLEN len = SvLEN(sstr);
4700 register char *new_pv;
4703 PerlIO_printf(Perl_debug_log, "Fast copy on write: %p -> %p\n",
4711 if (SvTHINKFIRST(dstr))
4712 sv_force_normal_flags(dstr, SV_COW_DROP_PV);
4713 else if (SvPVX(dstr))
4714 Safefree(SvPVX(dstr));
4718 (void)SvUPGRADE (dstr, SVt_PVIV);
4720 assert (SvPOK(sstr));
4721 assert (SvPOKp(sstr));
4722 assert (!SvIOK(sstr));
4723 assert (!SvIOKp(sstr));
4724 assert (!SvNOK(sstr));
4725 assert (!SvNOKp(sstr));
4727 if (SvIsCOW(sstr)) {
4729 if (SvLEN(sstr) == 0) {
4730 /* source is a COW shared hash key. */
4731 UV hash = SvUVX(sstr);
4732 DEBUG_C(PerlIO_printf(Perl_debug_log,
4733 "Fast copy on write: Sharing hash\n"));
4735 new_pv = sharepvn(SvPVX(sstr), (SvUTF8(sstr)?-cur:cur), hash);
4738 SV_COW_NEXT_SV_SET(dstr, SV_COW_NEXT_SV(sstr));
4740 assert ((SvFLAGS(sstr) & CAN_COW_MASK) == CAN_COW_FLAGS);
4741 (void)SvUPGRADE (sstr, SVt_PVIV);
4742 SvREADONLY_on(sstr);
4744 DEBUG_C(PerlIO_printf(Perl_debug_log,
4745 "Fast copy on write: Converting sstr to COW\n"));
4746 SV_COW_NEXT_SV_SET(dstr, sstr);
4748 SV_COW_NEXT_SV_SET(sstr, dstr);
4749 new_pv = SvPVX(sstr);
4752 SvPV_set(dstr, new_pv);
4753 SvFLAGS(dstr) = (SVt_PVIV|SVf_POK|SVp_POK|SVf_FAKE|SVf_READONLY);
4766 =for apidoc sv_setpvn
4768 Copies a string into an SV. The C<len> parameter indicates the number of
4769 bytes to be copied. If the C<ptr> argument is NULL the SV will become
4770 undefined. Does not handle 'set' magic. See C<sv_setpvn_mg>.
4776 Perl_sv_setpvn(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
4778 register char *dptr;
4780 SV_CHECK_THINKFIRST_COW_DROP(sv);
4786 /* len is STRLEN which is unsigned, need to copy to signed */
4789 Perl_croak(aTHX_ "panic: sv_setpvn called with negative strlen");
4791 (void)SvUPGRADE(sv, SVt_PV);
4793 SvGROW(sv, len + 1);
4795 Move(ptr,dptr,len,char);
4798 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4803 =for apidoc sv_setpvn_mg
4805 Like C<sv_setpvn>, but also handles 'set' magic.
4811 Perl_sv_setpvn_mg(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
4813 sv_setpvn(sv,ptr,len);
4818 =for apidoc sv_setpv
4820 Copies a string into an SV. The string must be null-terminated. Does not
4821 handle 'set' magic. See C<sv_setpv_mg>.
4827 Perl_sv_setpv(pTHX_ register SV *sv, register const char *ptr)
4829 register STRLEN len;
4831 SV_CHECK_THINKFIRST_COW_DROP(sv);
4837 (void)SvUPGRADE(sv, SVt_PV);
4839 SvGROW(sv, len + 1);
4840 Move(ptr,SvPVX(sv),len+1,char);
4842 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4847 =for apidoc sv_setpv_mg
4849 Like C<sv_setpv>, but also handles 'set' magic.
4855 Perl_sv_setpv_mg(pTHX_ register SV *sv, register const char *ptr)
4862 =for apidoc sv_usepvn
4864 Tells an SV to use C<ptr> to find its string value. Normally the string is
4865 stored inside the SV but sv_usepvn allows the SV to use an outside string.
4866 The C<ptr> should point to memory that was allocated by C<malloc>. The
4867 string length, C<len>, must be supplied. This function will realloc the
4868 memory pointed to by C<ptr>, so that pointer should not be freed or used by
4869 the programmer after giving it to sv_usepvn. Does not handle 'set' magic.
4870 See C<sv_usepvn_mg>.
4876 Perl_sv_usepvn(pTHX_ register SV *sv, register char *ptr, register STRLEN len)
4878 SV_CHECK_THINKFIRST_COW_DROP(sv);
4879 (void)SvUPGRADE(sv, SVt_PV);
4884 (void)SvOOK_off(sv);
4885 if (SvPVX(sv) && SvLEN(sv))
4886 Safefree(SvPVX(sv));
4887 Renew(ptr, len+1, char);
4890 SvLEN_set(sv, len+1);
4892 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4897 =for apidoc sv_usepvn_mg
4899 Like C<sv_usepvn>, but also handles 'set' magic.
4905 Perl_sv_usepvn_mg(pTHX_ register SV *sv, register char *ptr, register STRLEN len)
4907 sv_usepvn(sv,ptr,len);
4911 #ifdef PERL_COPY_ON_WRITE
4912 /* Need to do this *after* making the SV normal, as we need the buffer
4913 pointer to remain valid until after we've copied it. If we let go too early,
4914 another thread could invalidate it by unsharing last of the same hash key
4915 (which it can do by means other than releasing copy-on-write Svs)
4916 or by changing the other copy-on-write SVs in the loop. */
4918 S_sv_release_COW(pTHX_ register SV *sv, char *pvx, STRLEN cur, STRLEN len,
4919 U32 hash, SV *after)
4921 if (len) { /* this SV was SvIsCOW_normal(sv) */
4922 /* we need to find the SV pointing to us. */
4923 SV *current = SV_COW_NEXT_SV(after);
4925 if (current == sv) {
4926 /* The SV we point to points back to us (there were only two of us
4928 Hence other SV is no longer copy on write either. */
4930 SvREADONLY_off(after);
4932 /* We need to follow the pointers around the loop. */
4934 while ((next = SV_COW_NEXT_SV(current)) != sv) {
4937 /* don't loop forever if the structure is bust, and we have
4938 a pointer into a closed loop. */
4939 assert (current != after);
4940 assert (SvPVX(current) == pvx);
4942 /* Make the SV before us point to the SV after us. */
4943 SV_COW_NEXT_SV_SET(current, after);
4946 unsharepvn(pvx, SvUTF8(sv) ? -(I32)cur : cur, hash);
4951 Perl_sv_release_IVX(pTHX_ register SV *sv)
4954 sv_force_normal_flags(sv, 0);
4955 return SvOOK_off(sv);
4959 =for apidoc sv_force_normal_flags
4961 Undo various types of fakery on an SV: if the PV is a shared string, make
4962 a private copy; if we're a ref, stop refing; if we're a glob, downgrade to
4963 an xpvmg; if we're a copy-on-write scalar, this is the on-write time when
4964 we do the copy, and is also used locally. If C<SV_COW_DROP_PV> is set
4965 then a copy-on-write scalar drops its PV buffer (if any) and becomes
4966 SvPOK_off rather than making a copy. (Used where this scalar is about to be
4967 set to some other value.) In addition, the C<flags> parameter gets passed to
4968 C<sv_unref_flags()> when unrefing. C<sv_force_normal> calls this function
4969 with flags set to 0.
4975 Perl_sv_force_normal_flags(pTHX_ register SV *sv, U32 flags)
4977 #ifdef PERL_COPY_ON_WRITE
4978 if (SvREADONLY(sv)) {
4979 /* At this point I believe I should acquire a global SV mutex. */
4981 char *pvx = SvPVX(sv);
4982 STRLEN len = SvLEN(sv);
4983 STRLEN cur = SvCUR(sv);
4984 U32 hash = SvUVX(sv);
4985 SV *next = SV_COW_NEXT_SV(sv); /* next COW sv in the loop. */
4987 PerlIO_printf(Perl_debug_log,
4988 "Copy on write: Force normal %ld\n",
4994 /* This SV doesn't own the buffer, so need to New() a new one: */
4997 if (flags & SV_COW_DROP_PV) {
4998 /* OK, so we don't need to copy our buffer. */
5001 SvGROW(sv, cur + 1);
5002 Move(pvx,SvPVX(sv),cur,char);
5006 sv_release_COW(sv, pvx, cur, len, hash, next);
5011 else if (IN_PERL_RUNTIME)
5012 Perl_croak(aTHX_ PL_no_modify);
5013 /* At this point I believe that I can drop the global SV mutex. */
5016 if (SvREADONLY(sv)) {
5018 char *pvx = SvPVX(sv);
5019 int is_utf8 = SvUTF8(sv);
5020 STRLEN len = SvCUR(sv);
5021 U32 hash = SvUVX(sv);
5026 SvGROW(sv, len + 1);
5027 Move(pvx,SvPVX(sv),len,char);
5029 unsharepvn(pvx, is_utf8 ? -(I32)len : len, hash);
5031 else if (IN_PERL_RUNTIME)
5032 Perl_croak(aTHX_ PL_no_modify);
5036 sv_unref_flags(sv, flags);
5037 else if (SvFAKE(sv) && SvTYPE(sv) == SVt_PVGV)
5042 =for apidoc sv_force_normal
5044 Undo various types of fakery on an SV: if the PV is a shared string, make
5045 a private copy; if we're a ref, stop refing; if we're a glob, downgrade to
5046 an xpvmg. See also C<sv_force_normal_flags>.
5052 Perl_sv_force_normal(pTHX_ register SV *sv)
5054 sv_force_normal_flags(sv, 0);
5060 Efficient removal of characters from the beginning of the string buffer.
5061 SvPOK(sv) must be true and the C<ptr> must be a pointer to somewhere inside
5062 the string buffer. The C<ptr> becomes the first character of the adjusted
5063 string. Uses the "OOK hack".
5064 Beware: after this function returns, C<ptr> and SvPVX(sv) may no longer
5065 refer to the same chunk of data.
5071 Perl_sv_chop(pTHX_ register SV *sv, register char *ptr)
5073 register STRLEN delta;
5074 if (!ptr || !SvPOKp(sv))
5076 delta = ptr - SvPVX(sv);
5077 SV_CHECK_THINKFIRST(sv);
5078 if (SvTYPE(sv) < SVt_PVIV)
5079 sv_upgrade(sv,SVt_PVIV);
5082 if (!SvLEN(sv)) { /* make copy of shared string */
5083 char *pvx = SvPVX(sv);
5084 STRLEN len = SvCUR(sv);
5085 SvGROW(sv, len + 1);
5086 Move(pvx,SvPVX(sv),len,char);
5090 /* Same SvOOK_on but SvOOK_on does a SvIOK_off
5091 and we do that anyway inside the SvNIOK_off
5093 SvFLAGS(sv) |= SVf_OOK;
5102 /* sv_catpvn() is now a macro using Perl_sv_catpvn_flags();
5103 * this function provided for binary compatibility only
5107 Perl_sv_catpvn(pTHX_ SV *dsv, const char* sstr, STRLEN slen)
5109 sv_catpvn_flags(dsv, sstr, slen, SV_GMAGIC);
5113 =for apidoc sv_catpvn
5115 Concatenates the string onto the end of the string which is in the SV. The
5116 C<len> indicates number of bytes to copy. If the SV has the UTF-8
5117 status set, then the bytes appended should be valid UTF-8.
5118 Handles 'get' magic, but not 'set' magic. See C<sv_catpvn_mg>.
5120 =for apidoc sv_catpvn_flags
5122 Concatenates the string onto the end of the string which is in the SV. The
5123 C<len> indicates number of bytes to copy. If the SV has the UTF-8
5124 status set, then the bytes appended should be valid UTF-8.
5125 If C<flags> has C<SV_GMAGIC> bit set, will C<mg_get> on C<dsv> if
5126 appropriate, else not. C<sv_catpvn> and C<sv_catpvn_nomg> are implemented
5127 in terms of this function.
5133 Perl_sv_catpvn_flags(pTHX_ register SV *dsv, register const char *sstr, register STRLEN slen, I32 flags)
5138 dstr = SvPV_force_flags(dsv, dlen, flags);
5139 SvGROW(dsv, dlen + slen + 1);
5142 Move(sstr, SvPVX(dsv) + dlen, slen, char);
5145 (void)SvPOK_only_UTF8(dsv); /* validate pointer */
5150 =for apidoc sv_catpvn_mg
5152 Like C<sv_catpvn>, but also handles 'set' magic.
5158 Perl_sv_catpvn_mg(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
5160 sv_catpvn(sv,ptr,len);
5164 /* sv_catsv() is now a macro using Perl_sv_catsv_flags();
5165 * this function provided for binary compatibility only
5169 Perl_sv_catsv(pTHX_ SV *dstr, register SV *sstr)
5171 sv_catsv_flags(dstr, sstr, SV_GMAGIC);
5175 =for apidoc sv_catsv
5177 Concatenates the string from SV C<ssv> onto the end of the string in
5178 SV C<dsv>. Modifies C<dsv> but not C<ssv>. Handles 'get' magic, but
5179 not 'set' magic. See C<sv_catsv_mg>.
5181 =for apidoc sv_catsv_flags
5183 Concatenates the string from SV C<ssv> onto the end of the string in
5184 SV C<dsv>. Modifies C<dsv> but not C<ssv>. If C<flags> has C<SV_GMAGIC>
5185 bit set, will C<mg_get> on the SVs if appropriate, else not. C<sv_catsv>
5186 and C<sv_catsv_nomg> are implemented in terms of this function.
5191 Perl_sv_catsv_flags(pTHX_ SV *dsv, register SV *ssv, I32 flags)
5197 if ((spv = SvPV(ssv, slen))) {
5198 /* sutf8 and dutf8 were type bool, but under USE_ITHREADS,
5199 gcc version 2.95.2 20000220 (Debian GNU/Linux) for
5200 Linux xxx 2.2.17 on sparc64 with gcc -O2, we erroneously
5201 get dutf8 = 0x20000000, (i.e. SVf_UTF8) even though
5202 dsv->sv_flags doesn't have that bit set.
5203 Andy Dougherty 12 Oct 2001
5205 I32 sutf8 = DO_UTF8(ssv);
5208 if (SvGMAGICAL(dsv) && (flags & SV_GMAGIC))
5210 dutf8 = DO_UTF8(dsv);
5212 if (dutf8 != sutf8) {
5214 /* Not modifying source SV, so taking a temporary copy. */
5215 SV* csv = sv_2mortal(newSVpvn(spv, slen));
5217 sv_utf8_upgrade(csv);
5218 spv = SvPV(csv, slen);
5221 sv_utf8_upgrade_nomg(dsv);
5223 sv_catpvn_nomg(dsv, spv, slen);
5228 =for apidoc sv_catsv_mg
5230 Like C<sv_catsv>, but also handles 'set' magic.
5236 Perl_sv_catsv_mg(pTHX_ SV *dsv, register SV *ssv)
5243 =for apidoc sv_catpv
5245 Concatenates the string onto the end of the string which is in the SV.
5246 If the SV has the UTF-8 status set, then the bytes appended should be
5247 valid UTF-8. Handles 'get' magic, but not 'set' magic. See C<sv_catpv_mg>.
5252 Perl_sv_catpv(pTHX_ register SV *sv, register const char *ptr)
5254 register STRLEN len;
5260 junk = SvPV_force(sv, tlen);
5262 SvGROW(sv, tlen + len + 1);
5265 Move(ptr,SvPVX(sv)+tlen,len+1,char);
5267 (void)SvPOK_only_UTF8(sv); /* validate pointer */
5272 =for apidoc sv_catpv_mg
5274 Like C<sv_catpv>, but also handles 'set' magic.
5280 Perl_sv_catpv_mg(pTHX_ register SV *sv, register const char *ptr)
5289 Create a new null SV, or if len > 0, create a new empty SVt_PV type SV
5290 with an initial PV allocation of len+1. Normally accessed via the C<NEWSV>
5297 Perl_newSV(pTHX_ STRLEN len)
5303 sv_upgrade(sv, SVt_PV);
5304 SvGROW(sv, len + 1);
5309 =for apidoc sv_magicext
5311 Adds magic to an SV, upgrading it if necessary. Applies the
5312 supplied vtable and returns pointer to the magic added.
5314 Note that sv_magicext will allow things that sv_magic will not.
5315 In particular you can add magic to SvREADONLY SVs and and more than
5316 one instance of the same 'how'
5318 I C<namelen> is greater then zero then a savepvn() I<copy> of C<name> is stored,
5319 if C<namelen> is zero then C<name> is stored as-is and - as another special
5320 case - if C<(name && namelen == HEf_SVKEY)> then C<name> is assumed to contain
5321 an C<SV*> and has its REFCNT incremented
5323 (This is now used as a subroutine by sv_magic.)
5328 Perl_sv_magicext(pTHX_ SV* sv, SV* obj, int how, MGVTBL *vtable,
5329 const char* name, I32 namlen)
5333 if (SvTYPE(sv) < SVt_PVMG) {
5334 (void)SvUPGRADE(sv, SVt_PVMG);
5336 Newz(702,mg, 1, MAGIC);
5337 mg->mg_moremagic = SvMAGIC(sv);
5340 /* Some magic sontains a reference loop, where the sv and object refer to
5341 each other. To prevent a reference loop that would prevent such
5342 objects being freed, we look for such loops and if we find one we
5343 avoid incrementing the object refcount.
5345 Note we cannot do this to avoid self-tie loops as intervening RV must
5346 have its REFCNT incremented to keep it in existence.
5349 if (!obj || obj == sv ||
5350 how == PERL_MAGIC_arylen ||
5351 how == PERL_MAGIC_qr ||
5352 (SvTYPE(obj) == SVt_PVGV &&
5353 (GvSV(obj) == sv || GvHV(obj) == (HV*)sv || GvAV(obj) == (AV*)sv ||
5354 GvCV(obj) == (CV*)sv || GvIOp(obj) == (IO*)sv ||
5355 GvFORM(obj) == (CV*)sv)))
5360 mg->mg_obj = SvREFCNT_inc(obj);
5361 mg->mg_flags |= MGf_REFCOUNTED;
5364 /* Normal self-ties simply pass a null object, and instead of
5365 using mg_obj directly, use the SvTIED_obj macro to produce a
5366 new RV as needed. For glob "self-ties", we are tieing the PVIO
5367 with an RV obj pointing to the glob containing the PVIO. In
5368 this case, to avoid a reference loop, we need to weaken the
5372 if (how == PERL_MAGIC_tiedscalar && SvTYPE(sv) == SVt_PVIO &&
5373 obj && SvROK(obj) && GvIO(SvRV(obj)) == (IO*)sv)
5379 mg->mg_len = namlen;
5382 mg->mg_ptr = savepvn(name, namlen);
5383 else if (namlen == HEf_SVKEY)
5384 mg->mg_ptr = (char*)SvREFCNT_inc((SV*)name);
5386 mg->mg_ptr = (char *) name;
5388 mg->mg_virtual = vtable;
5392 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
5397 =for apidoc sv_magic
5399 Adds magic to an SV. First upgrades C<sv> to type C<SVt_PVMG> if necessary,
5400 then adds a new magic item of type C<how> to the head of the magic list.
5406 Perl_sv_magic(pTHX_ register SV *sv, SV *obj, int how, const char *name, I32 namlen)
5411 #ifdef PERL_COPY_ON_WRITE
5413 sv_force_normal_flags(sv, 0);
5415 if (SvREADONLY(sv)) {
5417 && how != PERL_MAGIC_regex_global
5418 && how != PERL_MAGIC_bm
5419 && how != PERL_MAGIC_fm
5420 && how != PERL_MAGIC_sv
5421 && how != PERL_MAGIC_backref
5424 Perl_croak(aTHX_ PL_no_modify);
5427 if (SvMAGICAL(sv) || (how == PERL_MAGIC_taint && SvTYPE(sv) >= SVt_PVMG)) {
5428 if (SvMAGIC(sv) && (mg = mg_find(sv, how))) {
5429 /* sv_magic() refuses to add a magic of the same 'how' as an
5432 if (how == PERL_MAGIC_taint)
5440 vtable = &PL_vtbl_sv;
5442 case PERL_MAGIC_overload:
5443 vtable = &PL_vtbl_amagic;
5445 case PERL_MAGIC_overload_elem:
5446 vtable = &PL_vtbl_amagicelem;
5448 case PERL_MAGIC_overload_table:
5449 vtable = &PL_vtbl_ovrld;
5452 vtable = &PL_vtbl_bm;
5454 case PERL_MAGIC_regdata:
5455 vtable = &PL_vtbl_regdata;
5457 case PERL_MAGIC_regdatum:
5458 vtable = &PL_vtbl_regdatum;
5460 case PERL_MAGIC_env:
5461 vtable = &PL_vtbl_env;
5464 vtable = &PL_vtbl_fm;
5466 case PERL_MAGIC_envelem:
5467 vtable = &PL_vtbl_envelem;
5469 case PERL_MAGIC_regex_global:
5470 vtable = &PL_vtbl_mglob;
5472 case PERL_MAGIC_isa:
5473 vtable = &PL_vtbl_isa;
5475 case PERL_MAGIC_isaelem:
5476 vtable = &PL_vtbl_isaelem;
5478 case PERL_MAGIC_nkeys:
5479 vtable = &PL_vtbl_nkeys;
5481 case PERL_MAGIC_dbfile:
5484 case PERL_MAGIC_dbline:
5485 vtable = &PL_vtbl_dbline;
5487 #ifdef USE_LOCALE_COLLATE
5488 case PERL_MAGIC_collxfrm:
5489 vtable = &PL_vtbl_collxfrm;
5491 #endif /* USE_LOCALE_COLLATE */
5492 case PERL_MAGIC_tied:
5493 vtable = &PL_vtbl_pack;
5495 case PERL_MAGIC_tiedelem:
5496 case PERL_MAGIC_tiedscalar:
5497 vtable = &PL_vtbl_packelem;
5500 vtable = &PL_vtbl_regexp;
5502 case PERL_MAGIC_sig:
5503 vtable = &PL_vtbl_sig;
5505 case PERL_MAGIC_sigelem:
5506 vtable = &PL_vtbl_sigelem;
5508 case PERL_MAGIC_taint:
5509 vtable = &PL_vtbl_taint;
5511 case PERL_MAGIC_uvar:
5512 vtable = &PL_vtbl_uvar;
5514 case PERL_MAGIC_vec:
5515 vtable = &PL_vtbl_vec;
5517 case PERL_MAGIC_vstring:
5520 case PERL_MAGIC_utf8:
5521 vtable = &PL_vtbl_utf8;
5523 case PERL_MAGIC_substr:
5524 vtable = &PL_vtbl_substr;
5526 case PERL_MAGIC_defelem:
5527 vtable = &PL_vtbl_defelem;
5529 case PERL_MAGIC_glob:
5530 vtable = &PL_vtbl_glob;
5532 case PERL_MAGIC_arylen:
5533 vtable = &PL_vtbl_arylen;
5535 case PERL_MAGIC_pos:
5536 vtable = &PL_vtbl_pos;
5538 case PERL_MAGIC_backref:
5539 vtable = &PL_vtbl_backref;
5541 case PERL_MAGIC_ext:
5542 /* Reserved for use by extensions not perl internals. */
5543 /* Useful for attaching extension internal data to perl vars. */
5544 /* Note that multiple extensions may clash if magical scalars */
5545 /* etc holding private data from one are passed to another. */
5548 Perl_croak(aTHX_ "Don't know how to handle magic of type \\%o", how);
5551 /* Rest of work is done else where */
5552 mg = sv_magicext(sv,obj,how,vtable,name,namlen);
5555 case PERL_MAGIC_taint:
5558 case PERL_MAGIC_ext:
5559 case PERL_MAGIC_dbfile:
5566 =for apidoc sv_unmagic
5568 Removes all magic of type C<type> from an SV.
5574 Perl_sv_unmagic(pTHX_ SV *sv, int type)
5578 if (SvTYPE(sv) < SVt_PVMG || !SvMAGIC(sv))
5581 for (mg = *mgp; mg; mg = *mgp) {
5582 if (mg->mg_type == type) {
5583 MGVTBL* vtbl = mg->mg_virtual;
5584 *mgp = mg->mg_moremagic;
5585 if (vtbl && vtbl->svt_free)
5586 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
5587 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
5589 Safefree(mg->mg_ptr);
5590 else if (mg->mg_len == HEf_SVKEY)
5591 SvREFCNT_dec((SV*)mg->mg_ptr);
5592 else if (mg->mg_type == PERL_MAGIC_utf8 && mg->mg_ptr)
5593 Safefree(mg->mg_ptr);
5595 if (mg->mg_flags & MGf_REFCOUNTED)
5596 SvREFCNT_dec(mg->mg_obj);
5600 mgp = &mg->mg_moremagic;
5604 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_NOK|SVp_POK)) >> PRIVSHIFT;
5611 =for apidoc sv_rvweaken
5613 Weaken a reference: set the C<SvWEAKREF> flag on this RV; give the
5614 referred-to SV C<PERL_MAGIC_backref> magic if it hasn't already; and
5615 push a back-reference to this RV onto the array of backreferences
5616 associated with that magic.
5622 Perl_sv_rvweaken(pTHX_ SV *sv)
5625 if (!SvOK(sv)) /* let undefs pass */
5628 Perl_croak(aTHX_ "Can't weaken a nonreference");
5629 else if (SvWEAKREF(sv)) {
5630 if (ckWARN(WARN_MISC))
5631 Perl_warner(aTHX_ packWARN(WARN_MISC), "Reference is already weak");
5635 sv_add_backref(tsv, sv);
5641 /* Give tsv backref magic if it hasn't already got it, then push a
5642 * back-reference to sv onto the array associated with the backref magic.
5646 S_sv_add_backref(pTHX_ SV *tsv, SV *sv)
5650 if (SvMAGICAL(tsv) && (mg = mg_find(tsv, PERL_MAGIC_backref)))
5651 av = (AV*)mg->mg_obj;
5654 sv_magic(tsv, (SV*)av, PERL_MAGIC_backref, NULL, 0);
5655 /* av now has a refcnt of 2, which avoids it getting freed
5656 * before us during global cleanup. The extra ref is removed
5657 * by magic_killbackrefs() when tsv is being freed */
5659 if (AvFILLp(av) >= AvMAX(av)) {
5661 SV **svp = AvARRAY(av);
5662 for (i = AvFILLp(av); i >= 0; i--)
5664 svp[i] = sv; /* reuse the slot */
5667 av_extend(av, AvFILLp(av)+1);
5669 AvARRAY(av)[++AvFILLp(av)] = sv; /* av_push() */
5672 /* delete a back-reference to ourselves from the backref magic associated
5673 * with the SV we point to.
5677 S_sv_del_backref(pTHX_ SV *sv)
5684 if (!SvMAGICAL(tsv) || !(mg = mg_find(tsv, PERL_MAGIC_backref)))
5685 Perl_croak(aTHX_ "panic: del_backref");
5686 av = (AV *)mg->mg_obj;
5688 for (i = AvFILLp(av); i >= 0; i--)
5689 if (svp[i] == sv) svp[i] = Nullsv;
5693 =for apidoc sv_insert
5695 Inserts a string at the specified offset/length within the SV. Similar to
5696 the Perl substr() function.
5702 Perl_sv_insert(pTHX_ SV *bigstr, STRLEN offset, STRLEN len, char *little, STRLEN littlelen)
5706 register char *midend;
5707 register char *bigend;
5713 Perl_croak(aTHX_ "Can't modify non-existent substring");
5714 SvPV_force(bigstr, curlen);
5715 (void)SvPOK_only_UTF8(bigstr);
5716 if (offset + len > curlen) {
5717 SvGROW(bigstr, offset+len+1);
5718 Zero(SvPVX(bigstr)+curlen, offset+len-curlen, char);
5719 SvCUR_set(bigstr, offset+len);
5723 i = littlelen - len;
5724 if (i > 0) { /* string might grow */
5725 big = SvGROW(bigstr, SvCUR(bigstr) + i + 1);
5726 mid = big + offset + len;
5727 midend = bigend = big + SvCUR(bigstr);
5730 while (midend > mid) /* shove everything down */
5731 *--bigend = *--midend;
5732 Move(little,big+offset,littlelen,char);
5738 Move(little,SvPVX(bigstr)+offset,len,char);
5743 big = SvPVX(bigstr);
5746 bigend = big + SvCUR(bigstr);
5748 if (midend > bigend)
5749 Perl_croak(aTHX_ "panic: sv_insert");
5751 if (mid - big > bigend - midend) { /* faster to shorten from end */
5753 Move(little, mid, littlelen,char);
5756 i = bigend - midend;
5758 Move(midend, mid, i,char);
5762 SvCUR_set(bigstr, mid - big);
5765 else if ((i = mid - big)) { /* faster from front */
5766 midend -= littlelen;
5768 sv_chop(bigstr,midend-i);
5773 Move(little, mid, littlelen,char);
5775 else if (littlelen) {
5776 midend -= littlelen;
5777 sv_chop(bigstr,midend);
5778 Move(little,midend,littlelen,char);
5781 sv_chop(bigstr,midend);
5787 =for apidoc sv_replace
5789 Make the first argument a copy of the second, then delete the original.
5790 The target SV physically takes over ownership of the body of the source SV
5791 and inherits its flags; however, the target keeps any magic it owns,
5792 and any magic in the source is discarded.
5793 Note that this is a rather specialist SV copying operation; most of the
5794 time you'll want to use C<sv_setsv> or one of its many macro front-ends.
5800 Perl_sv_replace(pTHX_ register SV *sv, register SV *nsv)
5802 U32 refcnt = SvREFCNT(sv);
5803 SV_CHECK_THINKFIRST_COW_DROP(sv);
5804 if (SvREFCNT(nsv) != 1 && ckWARN_d(WARN_INTERNAL))
5805 Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Reference miscount in sv_replace()");
5806 if (SvMAGICAL(sv)) {
5810 sv_upgrade(nsv, SVt_PVMG);
5811 SvMAGIC(nsv) = SvMAGIC(sv);
5812 SvFLAGS(nsv) |= SvMAGICAL(sv);
5818 assert(!SvREFCNT(sv));
5819 StructCopy(nsv,sv,SV);
5820 #ifdef PERL_COPY_ON_WRITE
5821 if (SvIsCOW_normal(nsv)) {
5822 /* We need to follow the pointers around the loop to make the
5823 previous SV point to sv, rather than nsv. */
5826 while ((next = SV_COW_NEXT_SV(current)) != nsv) {
5829 assert(SvPVX(current) == SvPVX(nsv));
5831 /* Make the SV before us point to the SV after us. */
5833 PerlIO_printf(Perl_debug_log, "previous is\n");
5835 PerlIO_printf(Perl_debug_log,
5836 "move it from 0x%"UVxf" to 0x%"UVxf"\n",
5837 (UV) SV_COW_NEXT_SV(current), (UV) sv);
5839 SV_COW_NEXT_SV_SET(current, sv);
5842 SvREFCNT(sv) = refcnt;
5843 SvFLAGS(nsv) |= SVTYPEMASK; /* Mark as freed */
5849 =for apidoc sv_clear
5851 Clear an SV: call any destructors, free up any memory used by the body,
5852 and free the body itself. The SV's head is I<not> freed, although
5853 its type is set to all 1's so that it won't inadvertently be assumed
5854 to be live during global destruction etc.
5855 This function should only be called when REFCNT is zero. Most of the time
5856 you'll want to call C<sv_free()> (or its macro wrapper C<SvREFCNT_dec>)
5863 Perl_sv_clear(pTHX_ register SV *sv)
5867 assert(SvREFCNT(sv) == 0);
5870 if (PL_defstash) { /* Still have a symbol table? */
5877 stash = SvSTASH(sv);
5878 destructor = StashHANDLER(stash,DESTROY);
5880 SV* tmpref = newRV(sv);
5881 SvREADONLY_on(tmpref); /* DESTROY() could be naughty */
5883 PUSHSTACKi(PERLSI_DESTROY);
5888 call_sv((SV*)destructor, G_DISCARD|G_EVAL|G_KEEPERR|G_VOID);
5894 if(SvREFCNT(tmpref) < 2) {
5895 /* tmpref is not kept alive! */
5900 SvREFCNT_dec(tmpref);
5902 } while (SvOBJECT(sv) && SvSTASH(sv) != stash);
5906 if (PL_in_clean_objs)
5907 Perl_croak(aTHX_ "DESTROY created new reference to dead object '%s'",
5909 /* DESTROY gave object new lease on life */
5915 SvREFCNT_dec(SvSTASH(sv)); /* possibly of changed persuasion */
5916 SvOBJECT_off(sv); /* Curse the object. */
5917 if (SvTYPE(sv) != SVt_PVIO)
5918 --PL_sv_objcount; /* XXX Might want something more general */
5921 if (SvTYPE(sv) >= SVt_PVMG) {
5924 if (SvFLAGS(sv) & SVpad_TYPED)
5925 SvREFCNT_dec(SvSTASH(sv));
5928 switch (SvTYPE(sv)) {
5931 IoIFP(sv) != PerlIO_stdin() &&
5932 IoIFP(sv) != PerlIO_stdout() &&
5933 IoIFP(sv) != PerlIO_stderr())
5935 io_close((IO*)sv, FALSE);
5937 if (IoDIRP(sv) && !(IoFLAGS(sv) & IOf_FAKE_DIRP))
5938 PerlDir_close(IoDIRP(sv));
5939 IoDIRP(sv) = (DIR*)NULL;
5940 Safefree(IoTOP_NAME(sv));
5941 Safefree(IoFMT_NAME(sv));
5942 Safefree(IoBOTTOM_NAME(sv));
5957 if (LvTYPE(sv) == 'T') { /* for tie: return HE to pool */
5958 SvREFCNT_dec(HeKEY_sv((HE*)LvTARG(sv)));
5959 HeNEXT((HE*)LvTARG(sv)) = PL_hv_fetch_ent_mh;
5960 PL_hv_fetch_ent_mh = (HE*)LvTARG(sv);
5962 else if (LvTYPE(sv) != 't') /* unless tie: unrefcnted fake SV** */
5963 SvREFCNT_dec(LvTARG(sv));
5967 Safefree(GvNAME(sv));
5968 /* cannot decrease stash refcount yet, as we might recursively delete
5969 ourselves when the refcnt drops to zero. Delay SvREFCNT_dec
5970 of stash until current sv is completely gone.
5971 -- JohnPC, 27 Mar 1998 */
5972 stash = GvSTASH(sv);
5978 (void)SvOOK_off(sv);
5986 SvREFCNT_dec(SvRV(sv));
5988 #ifdef PERL_COPY_ON_WRITE
5989 else if (SvPVX(sv)) {
5991 /* I believe I need to grab the global SV mutex here and
5992 then recheck the COW status. */
5994 PerlIO_printf(Perl_debug_log, "Copy on write: clear\n");
5997 sv_release_COW(sv, SvPVX(sv), SvCUR(sv), SvLEN(sv),
5998 SvUVX(sv), SV_COW_NEXT_SV(sv));
5999 /* And drop it here. */
6001 } else if (SvLEN(sv)) {
6002 Safefree(SvPVX(sv));
6006 else if (SvPVX(sv) && SvLEN(sv))
6007 Safefree(SvPVX(sv));
6008 else if (SvPVX(sv) && SvREADONLY(sv) && SvFAKE(sv)) {
6009 unsharepvn(SvPVX(sv),
6010 SvUTF8(sv) ? -(I32)SvCUR(sv) : SvCUR(sv),
6024 switch (SvTYPE(sv)) {
6040 del_XPVIV(SvANY(sv));
6043 del_XPVNV(SvANY(sv));
6046 del_XPVMG(SvANY(sv));
6049 del_XPVLV(SvANY(sv));
6052 del_XPVAV(SvANY(sv));
6055 del_XPVHV(SvANY(sv));
6058 del_XPVCV(SvANY(sv));
6061 del_XPVGV(SvANY(sv));
6062 /* code duplication for increased performance. */
6063 SvFLAGS(sv) &= SVf_BREAK;
6064 SvFLAGS(sv) |= SVTYPEMASK;
6065 /* decrease refcount of the stash that owns this GV, if any */
6067 SvREFCNT_dec(stash);
6068 return; /* not break, SvFLAGS reset already happened */
6070 del_XPVBM(SvANY(sv));
6073 del_XPVFM(SvANY(sv));
6076 del_XPVIO(SvANY(sv));
6079 SvFLAGS(sv) &= SVf_BREAK;
6080 SvFLAGS(sv) |= SVTYPEMASK;
6084 =for apidoc sv_newref
6086 Increment an SV's reference count. Use the C<SvREFCNT_inc()> wrapper
6093 Perl_sv_newref(pTHX_ SV *sv)
6103 Decrement an SV's reference count, and if it drops to zero, call
6104 C<sv_clear> to invoke destructors and free up any memory used by
6105 the body; finally, deallocate the SV's head itself.
6106 Normally called via a wrapper macro C<SvREFCNT_dec>.
6112 Perl_sv_free(pTHX_ SV *sv)
6116 if (SvREFCNT(sv) == 0) {
6117 if (SvFLAGS(sv) & SVf_BREAK)
6118 /* this SV's refcnt has been artificially decremented to
6119 * trigger cleanup */
6121 if (PL_in_clean_all) /* All is fair */
6123 if (SvREADONLY(sv) && SvIMMORTAL(sv)) {
6124 /* make sure SvREFCNT(sv)==0 happens very seldom */
6125 SvREFCNT(sv) = (~(U32)0)/2;
6128 if (ckWARN_d(WARN_INTERNAL))
6129 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
6130 "Attempt to free unreferenced scalar: SV 0x%"UVxf
6131 pTHX__FORMAT, PTR2UV(sv) pTHX__VALUE);
6134 if (--(SvREFCNT(sv)) > 0)
6136 Perl_sv_free2(aTHX_ sv);
6140 Perl_sv_free2(pTHX_ SV *sv)
6144 if (ckWARN_d(WARN_DEBUGGING))
6145 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
6146 "Attempt to free temp prematurely: SV 0x%"UVxf
6147 pTHX__FORMAT, PTR2UV(sv) pTHX__VALUE);
6151 if (SvREADONLY(sv) && SvIMMORTAL(sv)) {
6152 /* make sure SvREFCNT(sv)==0 happens very seldom */
6153 SvREFCNT(sv) = (~(U32)0)/2;
6164 Returns the length of the string in the SV. Handles magic and type
6165 coercion. See also C<SvCUR>, which gives raw access to the xpv_cur slot.
6171 Perl_sv_len(pTHX_ register SV *sv)
6179 len = mg_length(sv);
6181 (void)SvPV(sv, len);
6186 =for apidoc sv_len_utf8
6188 Returns the number of characters in the string in an SV, counting wide
6189 UTF-8 bytes as a single character. Handles magic and type coercion.
6195 * The length is cached in PERL_UTF8_magic, in the mg_len field. Also the
6196 * mg_ptr is used, by sv_pos_u2b(), see the comments of S_utf8_mg_pos_init().
6197 * (Note that the mg_len is not the length of the mg_ptr field.)
6202 Perl_sv_len_utf8(pTHX_ register SV *sv)
6208 return mg_length(sv);
6212 U8 *s = (U8*)SvPV(sv, len);
6213 MAGIC *mg = SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_utf8) : 0;
6215 if (mg && mg->mg_len != -1 && (mg->mg_len > 0 || len == 0)) {
6217 #ifdef PERL_UTF8_CACHE_ASSERT
6218 assert(ulen == Perl_utf8_length(aTHX_ s, s + len));
6222 ulen = Perl_utf8_length(aTHX_ s, s + len);
6223 if (!mg && !SvREADONLY(sv)) {
6224 sv_magic(sv, 0, PERL_MAGIC_utf8, 0, 0);
6225 mg = mg_find(sv, PERL_MAGIC_utf8);
6235 /* S_utf8_mg_pos_init() is used to initialize the mg_ptr field of
6236 * a PERL_UTF8_magic. The mg_ptr is used to store the mapping
6237 * between UTF-8 and byte offsets. There are two (substr offset and substr
6238 * length, the i offset, PERL_MAGIC_UTF8_CACHESIZE) times two (UTF-8 offset
6239 * and byte offset) cache positions.
6241 * The mg_len field is used by sv_len_utf8(), see its comments.
6242 * Note that the mg_len is not the length of the mg_ptr field.
6246 S_utf8_mg_pos_init(pTHX_ SV *sv, MAGIC **mgp, STRLEN **cachep, I32 i, I32 *offsetp, U8 *s, U8 *start)
6250 if (SvMAGICAL(sv) && !SvREADONLY(sv)) {
6252 *mgp = sv_magicext(sv, 0, PERL_MAGIC_utf8, &PL_vtbl_utf8, 0, 0);
6256 *cachep = (STRLEN *) (*mgp)->mg_ptr;
6258 Newz(0, *cachep, PERL_MAGIC_UTF8_CACHESIZE * 2, STRLEN);
6259 (*mgp)->mg_ptr = (char *) *cachep;
6263 (*cachep)[i] = *offsetp;
6264 (*cachep)[i+1] = s - start;
6272 * S_utf8_mg_pos() is used to query and update mg_ptr field of
6273 * a PERL_UTF8_magic. The mg_ptr is used to store the mapping
6274 * between UTF-8 and byte offsets. See also the comments of
6275 * S_utf8_mg_pos_init().
6279 S_utf8_mg_pos(pTHX_ SV *sv, MAGIC **mgp, STRLEN **cachep, I32 i, I32 *offsetp, I32 uoff, U8 **sp, U8 *start, U8 *send)
6283 if (SvMAGICAL(sv) && !SvREADONLY(sv)) {
6285 *mgp = mg_find(sv, PERL_MAGIC_utf8);
6286 if (*mgp && (*mgp)->mg_ptr) {
6287 *cachep = (STRLEN *) (*mgp)->mg_ptr;
6288 ASSERT_UTF8_CACHE(*cachep);
6289 if ((*cachep)[i] == (STRLEN)uoff) /* An exact match. */
6291 else { /* We will skip to the right spot. */
6296 /* The assumption is that going backward is half
6297 * the speed of going forward (that's where the
6298 * 2 * backw in the below comes from). (The real
6299 * figure of course depends on the UTF-8 data.) */
6301 if ((*cachep)[i] > (STRLEN)uoff) {
6303 backw = (*cachep)[i] - (STRLEN)uoff;
6305 if (forw < 2 * backw)
6308 p = start + (*cachep)[i+1];
6310 /* Try this only for the substr offset (i == 0),
6311 * not for the substr length (i == 2). */
6312 else if (i == 0) { /* (*cachep)[i] < uoff */
6313 STRLEN ulen = sv_len_utf8(sv);
6315 if ((STRLEN)uoff < ulen) {
6316 forw = (STRLEN)uoff - (*cachep)[i];
6317 backw = ulen - (STRLEN)uoff;
6319 if (forw < 2 * backw)
6320 p = start + (*cachep)[i+1];
6325 /* If the string is not long enough for uoff,
6326 * we could extend it, but not at this low a level. */
6330 if (forw < 2 * backw) {
6337 while (UTF8_IS_CONTINUATION(*p))
6342 /* Update the cache. */
6343 (*cachep)[i] = (STRLEN)uoff;
6344 (*cachep)[i+1] = p - start;
6346 /* Drop the stale "length" cache */
6355 if (found) { /* Setup the return values. */
6356 *offsetp = (*cachep)[i+1];
6357 *sp = start + *offsetp;
6360 *offsetp = send - start;
6362 else if (*sp < start) {
6368 #ifdef PERL_UTF8_CACHE_ASSERT
6373 while (n-- && s < send)
6377 assert(*offsetp == s - start);
6378 assert((*cachep)[0] == (STRLEN)uoff);
6379 assert((*cachep)[1] == *offsetp);
6381 ASSERT_UTF8_CACHE(*cachep);
6390 =for apidoc sv_pos_u2b
6392 Converts the value pointed to by offsetp from a count of UTF-8 chars from
6393 the start of the string, to a count of the equivalent number of bytes; if
6394 lenp is non-zero, it does the same to lenp, but this time starting from
6395 the offset, rather than from the start of the string. Handles magic and
6402 * sv_pos_u2b() uses, like sv_pos_b2u(), the mg_ptr of the potential
6403 * PERL_UTF8_magic of the sv to store the mapping between UTF-8 and
6404 * byte offsets. See also the comments of S_utf8_mg_pos().
6409 Perl_sv_pos_u2b(pTHX_ register SV *sv, I32* offsetp, I32* lenp)
6420 start = s = (U8*)SvPV(sv, len);
6422 I32 uoffset = *offsetp;
6427 if (utf8_mg_pos(sv, &mg, &cache, 0, offsetp, *offsetp, &s, start, send))
6429 if (!found && uoffset > 0) {
6430 while (s < send && uoffset--)
6434 if (utf8_mg_pos_init(sv, &mg, &cache, 0, offsetp, s, start))
6436 *offsetp = s - start;
6441 if (utf8_mg_pos(sv, &mg, &cache, 2, lenp, *lenp + *offsetp, &s, start, send)) {
6445 if (!found && *lenp > 0) {
6448 while (s < send && ulen--)
6452 utf8_mg_pos_init(sv, &mg, &cache, 2, lenp, s, start);
6456 ASSERT_UTF8_CACHE(cache);
6468 =for apidoc sv_pos_b2u
6470 Converts the value pointed to by offsetp from a count of bytes from the
6471 start of the string, to a count of the equivalent number of UTF-8 chars.
6472 Handles magic and type coercion.
6478 * sv_pos_b2u() uses, like sv_pos_u2b(), the mg_ptr of the potential
6479 * PERL_UTF8_magic of the sv to store the mapping between UTF-8 and
6480 * byte offsets. See also the comments of S_utf8_mg_pos().
6485 Perl_sv_pos_b2u(pTHX_ register SV* sv, I32* offsetp)
6493 s = (U8*)SvPV(sv, len);
6494 if ((I32)len < *offsetp)
6495 Perl_croak(aTHX_ "panic: sv_pos_b2u: bad byte offset");
6497 U8* send = s + *offsetp;
6499 STRLEN *cache = NULL;
6503 if (SvMAGICAL(sv) && !SvREADONLY(sv)) {
6504 mg = mg_find(sv, PERL_MAGIC_utf8);
6505 if (mg && mg->mg_ptr) {
6506 cache = (STRLEN *) mg->mg_ptr;
6507 if (cache[1] == (STRLEN)*offsetp) {
6508 /* An exact match. */
6509 *offsetp = cache[0];
6513 else if (cache[1] < (STRLEN)*offsetp) {
6514 /* We already know part of the way. */
6517 /* Let the below loop do the rest. */
6519 else { /* cache[1] > *offsetp */
6520 /* We already know all of the way, now we may
6521 * be able to walk back. The same assumption
6522 * is made as in S_utf8_mg_pos(), namely that
6523 * walking backward is twice slower than
6524 * walking forward. */
6525 STRLEN forw = *offsetp;
6526 STRLEN backw = cache[1] - *offsetp;
6528 if (!(forw < 2 * backw)) {
6529 U8 *p = s + cache[1];
6536 while (UTF8_IS_CONTINUATION(*p)) {
6544 *offsetp = cache[0];
6546 /* Drop the stale "length" cache */
6554 ASSERT_UTF8_CACHE(cache);
6560 /* Call utf8n_to_uvchr() to validate the sequence
6561 * (unless a simple non-UTF character) */
6562 if (!UTF8_IS_INVARIANT(*s))
6563 utf8n_to_uvchr(s, UTF8SKIP(s), &n, 0);
6572 if (!SvREADONLY(sv)) {
6574 sv_magic(sv, 0, PERL_MAGIC_utf8, 0, 0);
6575 mg = mg_find(sv, PERL_MAGIC_utf8);
6580 Newz(0, cache, PERL_MAGIC_UTF8_CACHESIZE * 2, STRLEN);
6581 mg->mg_ptr = (char *) cache;
6586 cache[1] = *offsetp;
6587 /* Drop the stale "length" cache */
6600 Returns a boolean indicating whether the strings in the two SVs are
6601 identical. Is UTF-8 and 'use bytes' aware, handles get magic, and will
6602 coerce its args to strings if necessary.
6608 Perl_sv_eq(pTHX_ register SV *sv1, register SV *sv2)
6616 SV* svrecode = Nullsv;
6623 pv1 = SvPV(sv1, cur1);
6630 pv2 = SvPV(sv2, cur2);
6632 if (cur1 && cur2 && SvUTF8(sv1) != SvUTF8(sv2) && !IN_BYTES) {
6633 /* Differing utf8ness.
6634 * Do not UTF8size the comparands as a side-effect. */
6637 svrecode = newSVpvn(pv2, cur2);
6638 sv_recode_to_utf8(svrecode, PL_encoding);
6639 pv2 = SvPV(svrecode, cur2);
6642 svrecode = newSVpvn(pv1, cur1);
6643 sv_recode_to_utf8(svrecode, PL_encoding);
6644 pv1 = SvPV(svrecode, cur1);
6646 /* Now both are in UTF-8. */
6648 SvREFCNT_dec(svrecode);
6653 bool is_utf8 = TRUE;
6656 /* sv1 is the UTF-8 one,
6657 * if is equal it must be downgrade-able */
6658 char *pv = (char*)bytes_from_utf8((U8*)pv1,
6664 /* sv2 is the UTF-8 one,
6665 * if is equal it must be downgrade-able */
6666 char *pv = (char *)bytes_from_utf8((U8*)pv2,
6672 /* Downgrade not possible - cannot be eq */
6680 eq = (pv1 == pv2) || memEQ(pv1, pv2, cur1);
6683 SvREFCNT_dec(svrecode);
6694 Compares the strings in two SVs. Returns -1, 0, or 1 indicating whether the
6695 string in C<sv1> is less than, equal to, or greater than the string in
6696 C<sv2>. Is UTF-8 and 'use bytes' aware, handles get magic, and will
6697 coerce its args to strings if necessary. See also C<sv_cmp_locale>.
6703 Perl_sv_cmp(pTHX_ register SV *sv1, register SV *sv2)
6706 char *pv1, *pv2, *tpv = Nullch;
6708 SV *svrecode = Nullsv;
6715 pv1 = SvPV(sv1, cur1);
6722 pv2 = SvPV(sv2, cur2);
6724 if (cur1 && cur2 && SvUTF8(sv1) != SvUTF8(sv2) && !IN_BYTES) {
6725 /* Differing utf8ness.
6726 * Do not UTF8size the comparands as a side-effect. */
6729 svrecode = newSVpvn(pv2, cur2);
6730 sv_recode_to_utf8(svrecode, PL_encoding);
6731 pv2 = SvPV(svrecode, cur2);
6734 pv2 = tpv = (char*)bytes_to_utf8((U8*)pv2, &cur2);
6739 svrecode = newSVpvn(pv1, cur1);
6740 sv_recode_to_utf8(svrecode, PL_encoding);
6741 pv1 = SvPV(svrecode, cur1);
6744 pv1 = tpv = (char*)bytes_to_utf8((U8*)pv1, &cur1);
6750 cmp = cur2 ? -1 : 0;
6754 I32 retval = memcmp((void*)pv1, (void*)pv2, cur1 < cur2 ? cur1 : cur2);
6757 cmp = retval < 0 ? -1 : 1;
6758 } else if (cur1 == cur2) {
6761 cmp = cur1 < cur2 ? -1 : 1;
6766 SvREFCNT_dec(svrecode);
6775 =for apidoc sv_cmp_locale
6777 Compares the strings in two SVs in a locale-aware manner. Is UTF-8 and
6778 'use bytes' aware, handles get magic, and will coerce its args to strings
6779 if necessary. See also C<sv_cmp_locale>. See also C<sv_cmp>.
6785 Perl_sv_cmp_locale(pTHX_ register SV *sv1, register SV *sv2)
6787 #ifdef USE_LOCALE_COLLATE
6793 if (PL_collation_standard)
6797 pv1 = sv1 ? sv_collxfrm(sv1, &len1) : (char *) NULL;
6799 pv2 = sv2 ? sv_collxfrm(sv2, &len2) : (char *) NULL;
6801 if (!pv1 || !len1) {
6812 retval = memcmp((void*)pv1, (void*)pv2, len1 < len2 ? len1 : len2);
6815 return retval < 0 ? -1 : 1;
6818 * When the result of collation is equality, that doesn't mean
6819 * that there are no differences -- some locales exclude some
6820 * characters from consideration. So to avoid false equalities,
6821 * we use the raw string as a tiebreaker.
6827 #endif /* USE_LOCALE_COLLATE */
6829 return sv_cmp(sv1, sv2);
6833 #ifdef USE_LOCALE_COLLATE
6836 =for apidoc sv_collxfrm
6838 Add Collate Transform magic to an SV if it doesn't already have it.
6840 Any scalar variable may carry PERL_MAGIC_collxfrm magic that contains the
6841 scalar data of the variable, but transformed to such a format that a normal
6842 memory comparison can be used to compare the data according to the locale
6849 Perl_sv_collxfrm(pTHX_ SV *sv, STRLEN *nxp)
6853 mg = SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_collxfrm) : (MAGIC *) NULL;
6854 if (!mg || !mg->mg_ptr || *(U32*)mg->mg_ptr != PL_collation_ix) {
6859 Safefree(mg->mg_ptr);
6861 if ((xf = mem_collxfrm(s, len, &xlen))) {
6862 if (SvREADONLY(sv)) {
6865 return xf + sizeof(PL_collation_ix);
6868 sv_magic(sv, 0, PERL_MAGIC_collxfrm, 0, 0);
6869 mg = mg_find(sv, PERL_MAGIC_collxfrm);
6882 if (mg && mg->mg_ptr) {
6884 return mg->mg_ptr + sizeof(PL_collation_ix);
6892 #endif /* USE_LOCALE_COLLATE */
6897 Get a line from the filehandle and store it into the SV, optionally
6898 appending to the currently-stored string.
6904 Perl_sv_gets(pTHX_ register SV *sv, register PerlIO *fp, I32 append)
6908 register STDCHAR rslast;
6909 register STDCHAR *bp;
6915 if (SvTHINKFIRST(sv))
6916 sv_force_normal_flags(sv, append ? 0 : SV_COW_DROP_PV);
6917 /* XXX. If you make this PVIV, then copy on write can copy scalars read
6919 However, perlbench says it's slower, because the existing swipe code
6920 is faster than copy on write.
6921 Swings and roundabouts. */
6922 (void)SvUPGRADE(sv, SVt_PV);
6927 if (PerlIO_isutf8(fp)) {
6929 sv_utf8_upgrade_nomg(sv);
6930 sv_pos_u2b(sv,&append,0);
6932 } else if (SvUTF8(sv)) {
6933 SV *tsv = NEWSV(0,0);
6934 sv_gets(tsv, fp, 0);
6935 sv_utf8_upgrade_nomg(tsv);
6936 SvCUR_set(sv,append);
6939 goto return_string_or_null;
6944 if (PerlIO_isutf8(fp))
6947 if (IN_PERL_COMPILETIME) {
6948 /* we always read code in line mode */
6952 else if (RsSNARF(PL_rs)) {
6953 /* If it is a regular disk file use size from stat() as estimate
6954 of amount we are going to read - may result in malloc-ing
6955 more memory than we realy need if layers bellow reduce
6956 size we read (e.g. CRLF or a gzip layer)
6959 if (!PerlLIO_fstat(PerlIO_fileno(fp), &st) && S_ISREG(st.st_mode)) {
6960 Off_t offset = PerlIO_tell(fp);
6961 if (offset != (Off_t) -1 && st.st_size + append > offset) {
6962 (void) SvGROW(sv, (STRLEN)((st.st_size - offset) + append + 1));
6968 else if (RsRECORD(PL_rs)) {
6972 /* Grab the size of the record we're getting */
6973 recsize = SvIV(SvRV(PL_rs));
6974 buffer = SvGROW(sv, (STRLEN)(recsize + append + 1)) + append;
6977 /* VMS wants read instead of fread, because fread doesn't respect */
6978 /* RMS record boundaries. This is not necessarily a good thing to be */
6979 /* doing, but we've got no other real choice - except avoid stdio
6980 as implementation - perhaps write a :vms layer ?
6982 bytesread = PerlLIO_read(PerlIO_fileno(fp), buffer, recsize);
6984 bytesread = PerlIO_read(fp, buffer, recsize);
6988 SvCUR_set(sv, bytesread += append);
6989 buffer[bytesread] = '\0';
6990 goto return_string_or_null;
6992 else if (RsPARA(PL_rs)) {
6998 /* Get $/ i.e. PL_rs into same encoding as stream wants */
6999 if (PerlIO_isutf8(fp)) {
7000 rsptr = SvPVutf8(PL_rs, rslen);
7003 if (SvUTF8(PL_rs)) {
7004 if (!sv_utf8_downgrade(PL_rs, TRUE)) {
7005 Perl_croak(aTHX_ "Wide character in $/");
7008 rsptr = SvPV(PL_rs, rslen);
7012 rslast = rslen ? rsptr[rslen - 1] : '\0';
7014 if (rspara) { /* have to do this both before and after */
7015 do { /* to make sure file boundaries work right */
7018 i = PerlIO_getc(fp);
7022 PerlIO_ungetc(fp,i);
7028 /* See if we know enough about I/O mechanism to cheat it ! */
7030 /* This used to be #ifdef test - it is made run-time test for ease
7031 of abstracting out stdio interface. One call should be cheap
7032 enough here - and may even be a macro allowing compile
7036 if (PerlIO_fast_gets(fp)) {
7039 * We're going to steal some values from the stdio struct
7040 * and put EVERYTHING in the innermost loop into registers.
7042 register STDCHAR *ptr;
7046 #if defined(VMS) && defined(PERLIO_IS_STDIO)
7047 /* An ungetc()d char is handled separately from the regular
7048 * buffer, so we getc() it back out and stuff it in the buffer.
7050 i = PerlIO_getc(fp);
7051 if (i == EOF) return 0;
7052 *(--((*fp)->_ptr)) = (unsigned char) i;
7056 /* Here is some breathtakingly efficient cheating */
7058 cnt = PerlIO_get_cnt(fp); /* get count into register */
7059 /* make sure we have the room */
7060 if ((I32)(SvLEN(sv) - append) <= cnt + 1) {
7061 /* Not room for all of it
7062 if we are looking for a separator and room for some
7064 if (rslen && cnt > 80 && (I32)SvLEN(sv) > append) {
7065 /* just process what we have room for */
7066 shortbuffered = cnt - SvLEN(sv) + append + 1;
7067 cnt -= shortbuffered;
7071 /* remember that cnt can be negative */
7072 SvGROW(sv, (STRLEN)(append + (cnt <= 0 ? 2 : (cnt + 1))));
7077 bp = (STDCHAR*)SvPVX(sv) + append; /* move these two too to registers */
7078 ptr = (STDCHAR*)PerlIO_get_ptr(fp);
7079 DEBUG_P(PerlIO_printf(Perl_debug_log,
7080 "Screamer: entering, ptr=%"UVuf", cnt=%ld\n",PTR2UV(ptr),(long)cnt));
7081 DEBUG_P(PerlIO_printf(Perl_debug_log,
7082 "Screamer: entering: PerlIO * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
7083 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
7084 PTR2UV(PerlIO_has_base(fp) ? PerlIO_get_base(fp) : 0)));
7089 while (cnt > 0) { /* this | eat */
7091 if ((*bp++ = *ptr++) == rslast) /* really | dust */
7092 goto thats_all_folks; /* screams | sed :-) */
7096 Copy(ptr, bp, cnt, char); /* this | eat */
7097 bp += cnt; /* screams | dust */
7098 ptr += cnt; /* louder | sed :-) */
7103 if (shortbuffered) { /* oh well, must extend */
7104 cnt = shortbuffered;
7106 bpx = bp - (STDCHAR*)SvPVX(sv); /* box up before relocation */
7108 SvGROW(sv, SvLEN(sv) + append + cnt + 2);
7109 bp = (STDCHAR*)SvPVX(sv) + bpx; /* unbox after relocation */
7113 DEBUG_P(PerlIO_printf(Perl_debug_log,
7114 "Screamer: going to getc, ptr=%"UVuf", cnt=%ld\n",
7115 PTR2UV(ptr),(long)cnt));
7116 PerlIO_set_ptrcnt(fp, (STDCHAR*)ptr, cnt); /* deregisterize cnt and ptr */
7118 DEBUG_P(PerlIO_printf(Perl_debug_log,
7119 "Screamer: pre: FILE * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
7120 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
7121 PTR2UV(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0)));
7123 /* This used to call 'filbuf' in stdio form, but as that behaves like
7124 getc when cnt <= 0 we use PerlIO_getc here to avoid introducing
7125 another abstraction. */
7126 i = PerlIO_getc(fp); /* get more characters */
7128 DEBUG_P(PerlIO_printf(Perl_debug_log,
7129 "Screamer: post: 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 cnt = PerlIO_get_cnt(fp);
7134 ptr = (STDCHAR*)PerlIO_get_ptr(fp); /* reregisterize cnt and ptr */
7135 DEBUG_P(PerlIO_printf(Perl_debug_log,
7136 "Screamer: after getc, ptr=%"UVuf", cnt=%ld\n",PTR2UV(ptr),(long)cnt));
7138 if (i == EOF) /* all done for ever? */
7139 goto thats_really_all_folks;
7141 bpx = bp - (STDCHAR*)SvPVX(sv); /* box up before relocation */
7143 SvGROW(sv, bpx + cnt + 2);
7144 bp = (STDCHAR*)SvPVX(sv) + bpx; /* unbox after relocation */
7146 *bp++ = (STDCHAR)i; /* store character from PerlIO_getc */
7148 if (rslen && (STDCHAR)i == rslast) /* all done for now? */
7149 goto thats_all_folks;
7153 if ((rslen > 1 && (STRLEN)(bp - (STDCHAR*)SvPVX(sv)) < rslen) ||
7154 memNE((char*)bp - rslen, rsptr, rslen))
7155 goto screamer; /* go back to the fray */
7156 thats_really_all_folks:
7158 cnt += shortbuffered;
7159 DEBUG_P(PerlIO_printf(Perl_debug_log,
7160 "Screamer: quitting, ptr=%"UVuf", cnt=%ld\n",PTR2UV(ptr),(long)cnt));
7161 PerlIO_set_ptrcnt(fp, (STDCHAR*)ptr, cnt); /* put these back or we're in trouble */
7162 DEBUG_P(PerlIO_printf(Perl_debug_log,
7163 "Screamer: end: FILE * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
7164 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
7165 PTR2UV(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0)));
7167 SvCUR_set(sv, bp - (STDCHAR*)SvPVX(sv)); /* set length */
7168 DEBUG_P(PerlIO_printf(Perl_debug_log,
7169 "Screamer: done, len=%ld, string=|%.*s|\n",
7170 (long)SvCUR(sv),(int)SvCUR(sv),SvPVX(sv)));
7174 /*The big, slow, and stupid way. */
7176 /* Any stack-challenged places. */
7178 /* EPOC: need to work around SDK features. *
7179 * On WINS: MS VC5 generates calls to _chkstk, *
7180 * if a "large" stack frame is allocated. *
7181 * gcc on MARM does not generate calls like these. */
7182 # define USEHEAPINSTEADOFSTACK
7185 #ifdef USEHEAPINSTEADOFSTACK
7187 New(0, buf, 8192, STDCHAR);
7195 register STDCHAR *bpe = buf + sizeof(buf);
7197 while ((i = PerlIO_getc(fp)) != EOF && (*bp++ = (STDCHAR)i) != rslast && bp < bpe)
7198 ; /* keep reading */
7202 cnt = PerlIO_read(fp,(char*)buf, sizeof(buf));
7203 /* Accomodate broken VAXC compiler, which applies U8 cast to
7204 * both args of ?: operator, causing EOF to change into 255
7207 i = (U8)buf[cnt - 1];
7213 cnt = 0; /* we do need to re-set the sv even when cnt <= 0 */
7215 sv_catpvn(sv, (char *) buf, cnt);
7217 sv_setpvn(sv, (char *) buf, cnt);
7219 if (i != EOF && /* joy */
7221 SvCUR(sv) < rslen ||
7222 memNE(SvPVX(sv) + SvCUR(sv) - rslen, rsptr, rslen)))
7226 * If we're reading from a TTY and we get a short read,
7227 * indicating that the user hit his EOF character, we need
7228 * to notice it now, because if we try to read from the TTY
7229 * again, the EOF condition will disappear.
7231 * The comparison of cnt to sizeof(buf) is an optimization
7232 * that prevents unnecessary calls to feof().
7236 if (!(cnt < sizeof(buf) && PerlIO_eof(fp)))
7240 #ifdef USEHEAPINSTEADOFSTACK
7245 if (rspara) { /* have to do this both before and after */
7246 while (i != EOF) { /* to make sure file boundaries work right */
7247 i = PerlIO_getc(fp);
7249 PerlIO_ungetc(fp,i);
7255 return_string_or_null:
7256 return (SvCUR(sv) - append) ? SvPVX(sv) : Nullch;
7262 Auto-increment of the value in the SV, doing string to numeric conversion
7263 if necessary. Handles 'get' magic.
7269 Perl_sv_inc(pTHX_ register SV *sv)
7278 if (SvTHINKFIRST(sv)) {
7280 sv_force_normal_flags(sv, 0);
7281 if (SvREADONLY(sv)) {
7282 if (IN_PERL_RUNTIME)
7283 Perl_croak(aTHX_ PL_no_modify);
7287 if (SvAMAGIC(sv) && AMG_CALLun(sv,inc))
7289 i = PTR2IV(SvRV(sv));
7294 flags = SvFLAGS(sv);
7295 if ((flags & (SVp_NOK|SVp_IOK)) == SVp_NOK) {
7296 /* It's (privately or publicly) a float, but not tested as an
7297 integer, so test it to see. */
7299 flags = SvFLAGS(sv);
7301 if ((flags & SVf_IOK) || ((flags & (SVp_IOK | SVp_NOK)) == SVp_IOK)) {
7302 /* It's publicly an integer, or privately an integer-not-float */
7303 #ifdef PERL_PRESERVE_IVUV
7307 if (SvUVX(sv) == UV_MAX)
7308 sv_setnv(sv, UV_MAX_P1);
7310 (void)SvIOK_only_UV(sv);
7313 if (SvIVX(sv) == IV_MAX)
7314 sv_setuv(sv, (UV)IV_MAX + 1);
7316 (void)SvIOK_only(sv);
7322 if (flags & SVp_NOK) {
7323 (void)SvNOK_only(sv);
7328 if (!(flags & SVp_POK) || !*SvPVX(sv)) {
7329 if ((flags & SVTYPEMASK) < SVt_PVIV)
7330 sv_upgrade(sv, SVt_IV);
7331 (void)SvIOK_only(sv);
7336 while (isALPHA(*d)) d++;
7337 while (isDIGIT(*d)) d++;
7339 #ifdef PERL_PRESERVE_IVUV
7340 /* Got to punt this as an integer if needs be, but we don't issue
7341 warnings. Probably ought to make the sv_iv_please() that does
7342 the conversion if possible, and silently. */
7343 int numtype = grok_number(SvPVX(sv), SvCUR(sv), NULL);
7344 if (numtype && !(numtype & IS_NUMBER_INFINITY)) {
7345 /* Need to try really hard to see if it's an integer.
7346 9.22337203685478e+18 is an integer.
7347 but "9.22337203685478e+18" + 0 is UV=9223372036854779904
7348 so $a="9.22337203685478e+18"; $a+0; $a++
7349 needs to be the same as $a="9.22337203685478e+18"; $a++
7356 /* sv_2iv *should* have made this an NV */
7357 if (flags & SVp_NOK) {
7358 (void)SvNOK_only(sv);
7362 /* I don't think we can get here. Maybe I should assert this
7363 And if we do get here I suspect that sv_setnv will croak. NWC
7365 #if defined(USE_LONG_DOUBLE)
7366 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",
7367 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
7369 DEBUG_c(PerlIO_printf(Perl_debug_log,"sv_inc punt failed to convert '%s' to IOK or NOKp, UV=0x%"UVxf" NV=%"NVgf"\n",
7370 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
7373 #endif /* PERL_PRESERVE_IVUV */
7374 sv_setnv(sv,Atof(SvPVX(sv)) + 1.0);
7378 while (d >= SvPVX(sv)) {
7386 /* MKS: The original code here died if letters weren't consecutive.
7387 * at least it didn't have to worry about non-C locales. The
7388 * new code assumes that ('z'-'a')==('Z'-'A'), letters are
7389 * arranged in order (although not consecutively) and that only
7390 * [A-Za-z] are accepted by isALPHA in the C locale.
7392 if (*d != 'z' && *d != 'Z') {
7393 do { ++*d; } while (!isALPHA(*d));
7396 *(d--) -= 'z' - 'a';
7401 *(d--) -= 'z' - 'a' + 1;
7405 /* oh,oh, the number grew */
7406 SvGROW(sv, SvCUR(sv) + 2);
7408 for (d = SvPVX(sv) + SvCUR(sv); d > SvPVX(sv); d--)
7419 Auto-decrement of the value in the SV, doing string to numeric conversion
7420 if necessary. Handles 'get' magic.
7426 Perl_sv_dec(pTHX_ register SV *sv)
7434 if (SvTHINKFIRST(sv)) {
7436 sv_force_normal_flags(sv, 0);
7437 if (SvREADONLY(sv)) {
7438 if (IN_PERL_RUNTIME)
7439 Perl_croak(aTHX_ PL_no_modify);
7443 if (SvAMAGIC(sv) && AMG_CALLun(sv,dec))
7445 i = PTR2IV(SvRV(sv));
7450 /* Unlike sv_inc we don't have to worry about string-never-numbers
7451 and keeping them magic. But we mustn't warn on punting */
7452 flags = SvFLAGS(sv);
7453 if ((flags & SVf_IOK) || ((flags & (SVp_IOK | SVp_NOK)) == SVp_IOK)) {
7454 /* It's publicly an integer, or privately an integer-not-float */
7455 #ifdef PERL_PRESERVE_IVUV
7459 if (SvUVX(sv) == 0) {
7460 (void)SvIOK_only(sv);
7464 (void)SvIOK_only_UV(sv);
7468 if (SvIVX(sv) == IV_MIN)
7469 sv_setnv(sv, (NV)IV_MIN - 1.0);
7471 (void)SvIOK_only(sv);
7477 if (flags & SVp_NOK) {
7479 (void)SvNOK_only(sv);
7482 if (!(flags & SVp_POK)) {
7483 if ((flags & SVTYPEMASK) < SVt_PVNV)
7484 sv_upgrade(sv, SVt_NV);
7486 (void)SvNOK_only(sv);
7489 #ifdef PERL_PRESERVE_IVUV
7491 int numtype = grok_number(SvPVX(sv), SvCUR(sv), NULL);
7492 if (numtype && !(numtype & IS_NUMBER_INFINITY)) {
7493 /* Need to try really hard to see if it's an integer.
7494 9.22337203685478e+18 is an integer.
7495 but "9.22337203685478e+18" + 0 is UV=9223372036854779904
7496 so $a="9.22337203685478e+18"; $a+0; $a--
7497 needs to be the same as $a="9.22337203685478e+18"; $a--
7504 /* sv_2iv *should* have made this an NV */
7505 if (flags & SVp_NOK) {
7506 (void)SvNOK_only(sv);
7510 /* I don't think we can get here. Maybe I should assert this
7511 And if we do get here I suspect that sv_setnv will croak. NWC
7513 #if defined(USE_LONG_DOUBLE)
7514 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",
7515 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
7517 DEBUG_c(PerlIO_printf(Perl_debug_log,"sv_dec punt failed to convert '%s' to IOK or NOKp, UV=0x%"UVxf" NV=%"NVgf"\n",
7518 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
7522 #endif /* PERL_PRESERVE_IVUV */
7523 sv_setnv(sv,Atof(SvPVX(sv)) - 1.0); /* punt */
7527 =for apidoc sv_mortalcopy
7529 Creates a new SV which is a copy of the original SV (using C<sv_setsv>).
7530 The new SV is marked as mortal. It will be destroyed "soon", either by an
7531 explicit call to FREETMPS, or by an implicit call at places such as
7532 statement boundaries. See also C<sv_newmortal> and C<sv_2mortal>.
7537 /* Make a string that will exist for the duration of the expression
7538 * evaluation. Actually, it may have to last longer than that, but
7539 * hopefully we won't free it until it has been assigned to a
7540 * permanent location. */
7543 Perl_sv_mortalcopy(pTHX_ SV *oldstr)
7548 sv_setsv(sv,oldstr);
7550 PL_tmps_stack[++PL_tmps_ix] = sv;
7556 =for apidoc sv_newmortal
7558 Creates a new null SV which is mortal. The reference count of the SV is
7559 set to 1. It will be destroyed "soon", either by an explicit call to
7560 FREETMPS, or by an implicit call at places such as statement boundaries.
7561 See also C<sv_mortalcopy> and C<sv_2mortal>.
7567 Perl_sv_newmortal(pTHX)
7572 SvFLAGS(sv) = SVs_TEMP;
7574 PL_tmps_stack[++PL_tmps_ix] = sv;
7579 =for apidoc sv_2mortal
7581 Marks an existing SV as mortal. The SV will be destroyed "soon", either
7582 by an explicit call to FREETMPS, or by an implicit call at places such as
7583 statement boundaries. SvTEMP() is turned on which means that the SV's
7584 string buffer can be "stolen" if this SV is copied. See also C<sv_newmortal>
7585 and C<sv_mortalcopy>.
7591 Perl_sv_2mortal(pTHX_ register SV *sv)
7595 if (SvREADONLY(sv) && SvIMMORTAL(sv))
7598 PL_tmps_stack[++PL_tmps_ix] = sv;
7606 Creates a new SV and copies a string into it. The reference count for the
7607 SV is set to 1. If C<len> is zero, Perl will compute the length using
7608 strlen(). For efficiency, consider using C<newSVpvn> instead.
7614 Perl_newSVpv(pTHX_ const char *s, STRLEN len)
7621 sv_setpvn(sv,s,len);
7626 =for apidoc newSVpvn
7628 Creates a new SV and copies a string into it. The reference count for the
7629 SV is set to 1. Note that if C<len> is zero, Perl will create a zero length
7630 string. You are responsible for ensuring that the source string is at least
7631 C<len> bytes long. If the C<s> argument is NULL the new SV will be undefined.
7637 Perl_newSVpvn(pTHX_ const char *s, STRLEN len)
7642 sv_setpvn(sv,s,len);
7647 =for apidoc newSVpvn_share
7649 Creates a new SV with its SvPVX pointing to a shared string in the string
7650 table. If the string does not already exist in the table, it is created
7651 first. Turns on READONLY and FAKE. The string's hash is stored in the UV
7652 slot of the SV; if the C<hash> parameter is non-zero, that value is used;
7653 otherwise the hash is computed. The idea here is that as the string table
7654 is used for shared hash keys these strings will have SvPVX == HeKEY and
7655 hash lookup will avoid string compare.
7661 Perl_newSVpvn_share(pTHX_ const char *src, I32 len, U32 hash)
7664 bool is_utf8 = FALSE;
7666 STRLEN tmplen = -len;
7668 /* See the note in hv.c:hv_fetch() --jhi */
7669 src = (char*)bytes_from_utf8((U8*)src, &tmplen, &is_utf8);
7673 PERL_HASH(hash, src, len);
7675 sv_upgrade(sv, SVt_PVIV);
7676 SvPVX(sv) = sharepvn(src, is_utf8?-len:len, hash);
7689 #if defined(PERL_IMPLICIT_CONTEXT)
7691 /* pTHX_ magic can't cope with varargs, so this is a no-context
7692 * version of the main function, (which may itself be aliased to us).
7693 * Don't access this version directly.
7697 Perl_newSVpvf_nocontext(const char* pat, ...)
7702 va_start(args, pat);
7703 sv = vnewSVpvf(pat, &args);
7710 =for apidoc newSVpvf
7712 Creates a new SV and initializes it with the string formatted like
7719 Perl_newSVpvf(pTHX_ const char* pat, ...)
7723 va_start(args, pat);
7724 sv = vnewSVpvf(pat, &args);
7729 /* backend for newSVpvf() and newSVpvf_nocontext() */
7732 Perl_vnewSVpvf(pTHX_ const char* pat, va_list* args)
7736 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
7743 Creates a new SV and copies a floating point value into it.
7744 The reference count for the SV is set to 1.
7750 Perl_newSVnv(pTHX_ NV n)
7762 Creates a new SV and copies an integer into it. The reference count for the
7769 Perl_newSViv(pTHX_ IV i)
7781 Creates a new SV and copies an unsigned integer into it.
7782 The reference count for the SV is set to 1.
7788 Perl_newSVuv(pTHX_ UV u)
7798 =for apidoc newRV_noinc
7800 Creates an RV wrapper for an SV. The reference count for the original
7801 SV is B<not> incremented.
7807 Perl_newRV_noinc(pTHX_ SV *tmpRef)
7812 sv_upgrade(sv, SVt_RV);
7819 /* newRV_inc is the official function name to use now.
7820 * newRV_inc is in fact #defined to newRV in sv.h
7824 Perl_newRV(pTHX_ SV *tmpRef)
7826 return newRV_noinc(SvREFCNT_inc(tmpRef));
7832 Creates a new SV which is an exact duplicate of the original SV.
7839 Perl_newSVsv(pTHX_ register SV *old)
7845 if (SvTYPE(old) == SVTYPEMASK) {
7846 if (ckWARN_d(WARN_INTERNAL))
7847 Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "semi-panic: attempt to dup freed string");
7862 =for apidoc sv_reset
7864 Underlying implementation for the C<reset> Perl function.
7865 Note that the perl-level function is vaguely deprecated.
7871 Perl_sv_reset(pTHX_ register char *s, HV *stash)
7879 char todo[PERL_UCHAR_MAX+1];
7884 if (!*s) { /* reset ?? searches */
7885 for (pm = HvPMROOT(stash); pm; pm = pm->op_pmnext) {
7886 pm->op_pmdynflags &= ~PMdf_USED;
7891 /* reset variables */
7893 if (!HvARRAY(stash))
7896 Zero(todo, 256, char);
7898 i = (unsigned char)*s;
7902 max = (unsigned char)*s++;
7903 for ( ; i <= max; i++) {
7906 for (i = 0; i <= (I32) HvMAX(stash); i++) {
7907 for (entry = HvARRAY(stash)[i];
7909 entry = HeNEXT(entry))
7911 if (!todo[(U8)*HeKEY(entry)])
7913 gv = (GV*)HeVAL(entry);
7915 if (SvTHINKFIRST(sv)) {
7916 if (!SvREADONLY(sv) && SvROK(sv))
7921 if (SvTYPE(sv) >= SVt_PV) {
7923 if (SvPVX(sv) != Nullch)
7930 if (GvHV(gv) && !HvNAME(GvHV(gv))) {
7933 #ifdef USE_ENVIRON_ARRAY
7935 # ifdef USE_ITHREADS
7936 && PL_curinterp == aTHX
7940 environ[0] = Nullch;
7943 #endif /* !PERL_MICRO */
7953 Using various gambits, try to get an IO from an SV: the IO slot if its a
7954 GV; or the recursive result if we're an RV; or the IO slot of the symbol
7955 named after the PV if we're a string.
7961 Perl_sv_2io(pTHX_ SV *sv)
7967 switch (SvTYPE(sv)) {
7975 Perl_croak(aTHX_ "Bad filehandle: %s", GvNAME(gv));
7979 Perl_croak(aTHX_ PL_no_usym, "filehandle");
7981 return sv_2io(SvRV(sv));
7982 gv = gv_fetchpv(SvPV(sv,n_a), FALSE, SVt_PVIO);
7988 Perl_croak(aTHX_ "Bad filehandle: %"SVf, sv);
7997 Using various gambits, try to get a CV from an SV; in addition, try if
7998 possible to set C<*st> and C<*gvp> to the stash and GV associated with it.
8004 Perl_sv_2cv(pTHX_ SV *sv, HV **st, GV **gvp, I32 lref)
8011 return *gvp = Nullgv, Nullcv;
8012 switch (SvTYPE(sv)) {
8031 SV **sp = &sv; /* Used in tryAMAGICunDEREF macro. */
8032 tryAMAGICunDEREF(to_cv);
8035 if (SvTYPE(sv) == SVt_PVCV) {
8044 Perl_croak(aTHX_ "Not a subroutine reference");
8049 gv = gv_fetchpv(SvPV(sv, n_a), lref, SVt_PVCV);
8055 if (lref && !GvCVu(gv)) {
8058 tmpsv = NEWSV(704,0);
8059 gv_efullname3(tmpsv, gv, Nullch);
8060 /* XXX this is probably not what they think they're getting.
8061 * It has the same effect as "sub name;", i.e. just a forward
8063 newSUB(start_subparse(FALSE, 0),
8064 newSVOP(OP_CONST, 0, tmpsv),
8069 Perl_croak(aTHX_ "Unable to create sub named \"%"SVf"\"",
8079 Returns true if the SV has a true value by Perl's rules.
8080 Use the C<SvTRUE> macro instead, which may call C<sv_true()> or may
8081 instead use an in-line version.
8087 Perl_sv_true(pTHX_ register SV *sv)
8093 if ((tXpv = (XPV*)SvANY(sv)) &&
8094 (tXpv->xpv_cur > 1 ||
8095 (tXpv->xpv_cur && *tXpv->xpv_pv != '0')))
8102 return SvIVX(sv) != 0;
8105 return SvNVX(sv) != 0.0;
8107 return sv_2bool(sv);
8115 A private implementation of the C<SvIVx> macro for compilers which can't
8116 cope with complex macro expressions. Always use the macro instead.
8122 Perl_sv_iv(pTHX_ register SV *sv)
8126 return (IV)SvUVX(sv);
8135 A private implementation of the C<SvUVx> macro for compilers which can't
8136 cope with complex macro expressions. Always use the macro instead.
8142 Perl_sv_uv(pTHX_ register SV *sv)
8147 return (UV)SvIVX(sv);
8155 A private implementation of the C<SvNVx> macro for compilers which can't
8156 cope with complex macro expressions. Always use the macro instead.
8162 Perl_sv_nv(pTHX_ register SV *sv)
8169 /* sv_pv() is now a macro using SvPV_nolen();
8170 * this function provided for binary compatibility only
8174 Perl_sv_pv(pTHX_ SV *sv)
8181 return sv_2pv(sv, &n_a);
8187 Use the C<SvPV_nolen> macro instead
8191 A private implementation of the C<SvPV> macro for compilers which can't
8192 cope with complex macro expressions. Always use the macro instead.
8198 Perl_sv_pvn(pTHX_ SV *sv, STRLEN *lp)
8204 return sv_2pv(sv, lp);
8209 Perl_sv_pvn_nomg(pTHX_ register SV *sv, STRLEN *lp)
8215 return sv_2pv_flags(sv, lp, 0);
8218 /* sv_pvn_force() is now a macro using Perl_sv_pvn_force_flags();
8219 * this function provided for binary compatibility only
8223 Perl_sv_pvn_force(pTHX_ SV *sv, STRLEN *lp)
8225 return sv_pvn_force_flags(sv, lp, SV_GMAGIC);
8229 =for apidoc sv_pvn_force
8231 Get a sensible string out of the SV somehow.
8232 A private implementation of the C<SvPV_force> macro for compilers which
8233 can't cope with complex macro expressions. Always use the macro instead.
8235 =for apidoc sv_pvn_force_flags
8237 Get a sensible string out of the SV somehow.
8238 If C<flags> has C<SV_GMAGIC> bit set, will C<mg_get> on C<sv> if
8239 appropriate, else not. C<sv_pvn_force> and C<sv_pvn_force_nomg> are
8240 implemented in terms of this function.
8241 You normally want to use the various wrapper macros instead: see
8242 C<SvPV_force> and C<SvPV_force_nomg>
8248 Perl_sv_pvn_force_flags(pTHX_ SV *sv, STRLEN *lp, I32 flags)
8252 if (SvTHINKFIRST(sv) && !SvROK(sv))
8253 sv_force_normal_flags(sv, 0);
8259 if (SvTYPE(sv) > SVt_PVLV && SvTYPE(sv) != SVt_PVFM) {
8260 Perl_croak(aTHX_ "Can't coerce %s to string in %s", sv_reftype(sv,0),
8264 s = sv_2pv_flags(sv, lp, flags);
8265 if (s != SvPVX(sv)) { /* Almost, but not quite, sv_setpvn() */
8270 (void)SvUPGRADE(sv, SVt_PV); /* Never FALSE */
8271 SvGROW(sv, len + 1);
8272 Move(s,SvPVX(sv),len,char);
8277 SvPOK_on(sv); /* validate pointer */
8279 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2pv(%s)\n",
8280 PTR2UV(sv),SvPVX(sv)));
8286 /* sv_pvbyte () is now a macro using Perl_sv_2pv_flags();
8287 * this function provided for binary compatibility only
8291 Perl_sv_pvbyte(pTHX_ SV *sv)
8293 sv_utf8_downgrade(sv,0);
8298 =for apidoc sv_pvbyte
8300 Use C<SvPVbyte_nolen> instead.
8302 =for apidoc sv_pvbyten
8304 A private implementation of the C<SvPVbyte> macro for compilers
8305 which can't cope with complex macro expressions. Always use the macro
8312 Perl_sv_pvbyten(pTHX_ SV *sv, STRLEN *lp)
8314 sv_utf8_downgrade(sv,0);
8315 return sv_pvn(sv,lp);
8319 =for apidoc sv_pvbyten_force
8321 A private implementation of the C<SvPVbytex_force> macro for compilers
8322 which can't cope with complex macro expressions. Always use the macro
8329 Perl_sv_pvbyten_force(pTHX_ SV *sv, STRLEN *lp)
8331 sv_pvn_force(sv,lp);
8332 sv_utf8_downgrade(sv,0);
8337 /* sv_pvutf8 () is now a macro using Perl_sv_2pv_flags();
8338 * this function provided for binary compatibility only
8342 Perl_sv_pvutf8(pTHX_ SV *sv)
8344 sv_utf8_upgrade(sv);
8349 =for apidoc sv_pvutf8
8351 Use the C<SvPVutf8_nolen> macro instead
8353 =for apidoc sv_pvutf8n
8355 A private implementation of the C<SvPVutf8> macro for compilers
8356 which can't cope with complex macro expressions. Always use the macro
8363 Perl_sv_pvutf8n(pTHX_ SV *sv, STRLEN *lp)
8365 sv_utf8_upgrade(sv);
8366 return sv_pvn(sv,lp);
8370 =for apidoc sv_pvutf8n_force
8372 A private implementation of the C<SvPVutf8_force> macro for compilers
8373 which can't cope with complex macro expressions. Always use the macro
8380 Perl_sv_pvutf8n_force(pTHX_ SV *sv, STRLEN *lp)
8382 sv_pvn_force(sv,lp);
8383 sv_utf8_upgrade(sv);
8389 =for apidoc sv_reftype
8391 Returns a string describing what the SV is a reference to.
8397 Perl_sv_reftype(pTHX_ SV *sv, int ob)
8399 if (ob && SvOBJECT(sv)) {
8400 if (HvNAME(SvSTASH(sv)))
8401 return HvNAME(SvSTASH(sv));
8406 switch (SvTYPE(sv)) {
8423 case SVt_PVLV: return SvROK(sv) ? "REF"
8424 /* tied lvalues should appear to be
8425 * scalars for backwards compatitbility */
8426 : (LvTYPE(sv) == 't' || LvTYPE(sv) == 'T')
8427 ? "SCALAR" : "LVALUE";
8428 case SVt_PVAV: return "ARRAY";
8429 case SVt_PVHV: return "HASH";
8430 case SVt_PVCV: return "CODE";
8431 case SVt_PVGV: return "GLOB";
8432 case SVt_PVFM: return "FORMAT";
8433 case SVt_PVIO: return "IO";
8434 default: return "UNKNOWN";
8440 =for apidoc sv_isobject
8442 Returns a boolean indicating whether the SV is an RV pointing to a blessed
8443 object. If the SV is not an RV, or if the object is not blessed, then this
8450 Perl_sv_isobject(pTHX_ SV *sv)
8467 Returns a boolean indicating whether the SV is blessed into the specified
8468 class. This does not check for subtypes; use C<sv_derived_from> to verify
8469 an inheritance relationship.
8475 Perl_sv_isa(pTHX_ SV *sv, const char *name)
8486 if (!HvNAME(SvSTASH(sv)))
8489 return strEQ(HvNAME(SvSTASH(sv)), name);
8495 Creates a new SV for the RV, C<rv>, to point to. If C<rv> is not an RV then
8496 it will be upgraded to one. If C<classname> is non-null then the new SV will
8497 be blessed in the specified package. The new SV is returned and its
8498 reference count is 1.
8504 Perl_newSVrv(pTHX_ SV *rv, const char *classname)
8510 SV_CHECK_THINKFIRST_COW_DROP(rv);
8513 if (SvTYPE(rv) >= SVt_PVMG) {
8514 U32 refcnt = SvREFCNT(rv);
8518 SvREFCNT(rv) = refcnt;
8521 if (SvTYPE(rv) < SVt_RV)
8522 sv_upgrade(rv, SVt_RV);
8523 else if (SvTYPE(rv) > SVt_RV) {
8524 (void)SvOOK_off(rv);
8525 if (SvPVX(rv) && SvLEN(rv))
8526 Safefree(SvPVX(rv));
8536 HV* stash = gv_stashpv(classname, TRUE);
8537 (void)sv_bless(rv, stash);
8543 =for apidoc sv_setref_pv
8545 Copies a pointer into a new SV, optionally blessing the SV. The C<rv>
8546 argument will be upgraded to an RV. That RV will be modified to point to
8547 the new SV. If the C<pv> argument is NULL then C<PL_sv_undef> will be placed
8548 into the SV. The C<classname> argument indicates the package for the
8549 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
8550 will have a reference count of 1, and the RV will be returned.
8552 Do not use with other Perl types such as HV, AV, SV, CV, because those
8553 objects will become corrupted by the pointer copy process.
8555 Note that C<sv_setref_pvn> copies the string while this copies the pointer.
8561 Perl_sv_setref_pv(pTHX_ SV *rv, const char *classname, void *pv)
8564 sv_setsv(rv, &PL_sv_undef);
8568 sv_setiv(newSVrv(rv,classname), PTR2IV(pv));
8573 =for apidoc sv_setref_iv
8575 Copies an integer into a new SV, optionally blessing the SV. The C<rv>
8576 argument will be upgraded to an RV. That RV will be modified to point to
8577 the new SV. The C<classname> argument indicates the package for the
8578 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
8579 will have a reference count of 1, and the RV will be returned.
8585 Perl_sv_setref_iv(pTHX_ SV *rv, const char *classname, IV iv)
8587 sv_setiv(newSVrv(rv,classname), iv);
8592 =for apidoc sv_setref_uv
8594 Copies an unsigned integer into a new SV, optionally blessing the SV. The C<rv>
8595 argument will be upgraded to an RV. That RV will be modified to point to
8596 the new SV. The C<classname> argument indicates the package for the
8597 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
8598 will have a reference count of 1, and the RV will be returned.
8604 Perl_sv_setref_uv(pTHX_ SV *rv, const char *classname, UV uv)
8606 sv_setuv(newSVrv(rv,classname), uv);
8611 =for apidoc sv_setref_nv
8613 Copies a double into a new SV, optionally blessing the SV. The C<rv>
8614 argument will be upgraded to an RV. That RV will be modified to point to
8615 the new SV. The C<classname> argument indicates the package for the
8616 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
8617 will have a reference count of 1, and the RV will be returned.
8623 Perl_sv_setref_nv(pTHX_ SV *rv, const char *classname, NV nv)
8625 sv_setnv(newSVrv(rv,classname), nv);
8630 =for apidoc sv_setref_pvn
8632 Copies a string into a new SV, optionally blessing the SV. The length of the
8633 string must be specified with C<n>. The C<rv> argument will be upgraded to
8634 an RV. That RV will be modified to point to the new SV. The C<classname>
8635 argument indicates the package for the blessing. Set C<classname> to
8636 C<Nullch> to avoid the blessing. The new SV will have a reference count
8637 of 1, and the RV will be returned.
8639 Note that C<sv_setref_pv> copies the pointer while this copies the string.
8645 Perl_sv_setref_pvn(pTHX_ SV *rv, const char *classname, char *pv, STRLEN n)
8647 sv_setpvn(newSVrv(rv,classname), pv, n);
8652 =for apidoc sv_bless
8654 Blesses an SV into a specified package. The SV must be an RV. The package
8655 must be designated by its stash (see C<gv_stashpv()>). The reference count
8656 of the SV is unaffected.
8662 Perl_sv_bless(pTHX_ SV *sv, HV *stash)
8666 Perl_croak(aTHX_ "Can't bless non-reference value");
8668 if (SvFLAGS(tmpRef) & (SVs_OBJECT|SVf_READONLY)) {
8669 if (SvREADONLY(tmpRef))
8670 Perl_croak(aTHX_ PL_no_modify);
8671 if (SvOBJECT(tmpRef)) {
8672 if (SvTYPE(tmpRef) != SVt_PVIO)
8674 SvREFCNT_dec(SvSTASH(tmpRef));
8677 SvOBJECT_on(tmpRef);
8678 if (SvTYPE(tmpRef) != SVt_PVIO)
8680 (void)SvUPGRADE(tmpRef, SVt_PVMG);
8681 SvSTASH(tmpRef) = (HV*)SvREFCNT_inc(stash);
8688 if(SvSMAGICAL(tmpRef))
8689 if(mg_find(tmpRef, PERL_MAGIC_ext) || mg_find(tmpRef, PERL_MAGIC_uvar))
8697 /* Downgrades a PVGV to a PVMG.
8701 S_sv_unglob(pTHX_ SV *sv)
8705 assert(SvTYPE(sv) == SVt_PVGV);
8710 SvREFCNT_dec(GvSTASH(sv));
8711 GvSTASH(sv) = Nullhv;
8713 sv_unmagic(sv, PERL_MAGIC_glob);
8714 Safefree(GvNAME(sv));
8717 /* need to keep SvANY(sv) in the right arena */
8718 xpvmg = new_XPVMG();
8719 StructCopy(SvANY(sv), xpvmg, XPVMG);
8720 del_XPVGV(SvANY(sv));
8723 SvFLAGS(sv) &= ~SVTYPEMASK;
8724 SvFLAGS(sv) |= SVt_PVMG;
8728 =for apidoc sv_unref_flags
8730 Unsets the RV status of the SV, and decrements the reference count of
8731 whatever was being referenced by the RV. This can almost be thought of
8732 as a reversal of C<newSVrv>. The C<cflags> argument can contain
8733 C<SV_IMMEDIATE_UNREF> to force the reference count to be decremented
8734 (otherwise the decrementing is conditional on the reference count being
8735 different from one or the reference being a readonly SV).
8742 Perl_sv_unref_flags(pTHX_ SV *sv, U32 flags)
8746 if (SvWEAKREF(sv)) {
8754 /* You can't have a || SvREADONLY(rv) here, as $a = $$a, where $a was
8755 assigned to as BEGIN {$a = \"Foo"} will fail. */
8756 if (SvREFCNT(rv) != 1 || (flags & SV_IMMEDIATE_UNREF))
8758 else /* XXX Hack, but hard to make $a=$a->[1] work otherwise */
8759 sv_2mortal(rv); /* Schedule for freeing later */
8763 =for apidoc sv_unref
8765 Unsets the RV status of the SV, and decrements the reference count of
8766 whatever was being referenced by the RV. This can almost be thought of
8767 as a reversal of C<newSVrv>. This is C<sv_unref_flags> with the C<flag>
8768 being zero. See C<SvROK_off>.
8774 Perl_sv_unref(pTHX_ SV *sv)
8776 sv_unref_flags(sv, 0);
8780 =for apidoc sv_taint
8782 Taint an SV. Use C<SvTAINTED_on> instead.
8787 Perl_sv_taint(pTHX_ SV *sv)
8789 sv_magic((sv), Nullsv, PERL_MAGIC_taint, Nullch, 0);
8793 =for apidoc sv_untaint
8795 Untaint an SV. Use C<SvTAINTED_off> instead.
8800 Perl_sv_untaint(pTHX_ SV *sv)
8802 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) {
8803 MAGIC *mg = mg_find(sv, PERL_MAGIC_taint);
8810 =for apidoc sv_tainted
8812 Test an SV for taintedness. Use C<SvTAINTED> instead.
8817 Perl_sv_tainted(pTHX_ SV *sv)
8819 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) {
8820 MAGIC *mg = mg_find(sv, PERL_MAGIC_taint);
8821 if (mg && ((mg->mg_len & 1) || ((mg->mg_len & 2) && mg->mg_obj == sv)))
8828 =for apidoc sv_setpviv
8830 Copies an integer into the given SV, also updating its string value.
8831 Does not handle 'set' magic. See C<sv_setpviv_mg>.
8837 Perl_sv_setpviv(pTHX_ SV *sv, IV iv)
8839 char buf[TYPE_CHARS(UV)];
8841 char *ptr = uiv_2buf(buf, iv, 0, 0, &ebuf);
8843 sv_setpvn(sv, ptr, ebuf - ptr);
8847 =for apidoc sv_setpviv_mg
8849 Like C<sv_setpviv>, but also handles 'set' magic.
8855 Perl_sv_setpviv_mg(pTHX_ SV *sv, IV iv)
8857 char buf[TYPE_CHARS(UV)];
8859 char *ptr = uiv_2buf(buf, iv, 0, 0, &ebuf);
8861 sv_setpvn(sv, ptr, ebuf - ptr);
8865 #if defined(PERL_IMPLICIT_CONTEXT)
8867 /* pTHX_ magic can't cope with varargs, so this is a no-context
8868 * version of the main function, (which may itself be aliased to us).
8869 * Don't access this version directly.
8873 Perl_sv_setpvf_nocontext(SV *sv, const char* pat, ...)
8877 va_start(args, pat);
8878 sv_vsetpvf(sv, pat, &args);
8882 /* pTHX_ magic can't cope with varargs, so this is a no-context
8883 * version of the main function, (which may itself be aliased to us).
8884 * Don't access this version directly.
8888 Perl_sv_setpvf_mg_nocontext(SV *sv, const char* pat, ...)
8892 va_start(args, pat);
8893 sv_vsetpvf_mg(sv, pat, &args);
8899 =for apidoc sv_setpvf
8901 Processes its arguments like C<sprintf> and sets an SV to the formatted
8902 output. Does not handle 'set' magic. See C<sv_setpvf_mg>.
8908 Perl_sv_setpvf(pTHX_ SV *sv, const char* pat, ...)
8911 va_start(args, pat);
8912 sv_vsetpvf(sv, pat, &args);
8916 /* backend for C<sv_setpvf> and C<sv_setpvf_nocontext> */
8919 Perl_sv_vsetpvf(pTHX_ SV *sv, const char* pat, va_list* args)
8921 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
8925 =for apidoc sv_setpvf_mg
8927 Like C<sv_setpvf>, but also handles 'set' magic.
8933 Perl_sv_setpvf_mg(pTHX_ SV *sv, const char* pat, ...)
8936 va_start(args, pat);
8937 sv_vsetpvf_mg(sv, pat, &args);
8941 /* backend for C<sv_setpvf_mg> C<setpvf_mg_nocontext> */
8944 Perl_sv_vsetpvf_mg(pTHX_ SV *sv, const char* pat, va_list* args)
8946 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
8950 #if defined(PERL_IMPLICIT_CONTEXT)
8952 /* pTHX_ magic can't cope with varargs, so this is a no-context
8953 * version of the main function, (which may itself be aliased to us).
8954 * Don't access this version directly.
8958 Perl_sv_catpvf_nocontext(SV *sv, const char* pat, ...)
8962 va_start(args, pat);
8963 sv_vcatpvf(sv, pat, &args);
8967 /* pTHX_ magic can't cope with varargs, so this is a no-context
8968 * version of the main function, (which may itself be aliased to us).
8969 * Don't access this version directly.
8973 Perl_sv_catpvf_mg_nocontext(SV *sv, const char* pat, ...)
8977 va_start(args, pat);
8978 sv_vcatpvf_mg(sv, pat, &args);
8984 =for apidoc sv_catpvf
8986 Processes its arguments like C<sprintf> and appends the formatted
8987 output to an SV. If the appended data contains "wide" characters
8988 (including, but not limited to, SVs with a UTF-8 PV formatted with %s,
8989 and characters >255 formatted with %c), the original SV might get
8990 upgraded to UTF-8. Handles 'get' magic, but not 'set' magic.
8991 C<SvSETMAGIC()> must typically be called after calling this function
8992 to handle 'set' magic.
8997 Perl_sv_catpvf(pTHX_ SV *sv, const char* pat, ...)
9000 va_start(args, pat);
9001 sv_vcatpvf(sv, pat, &args);
9005 /* backend for C<sv_catpvf> and C<catpvf_mg_nocontext> */
9008 Perl_sv_vcatpvf(pTHX_ SV *sv, const char* pat, va_list* args)
9010 sv_vcatpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
9014 =for apidoc sv_catpvf_mg
9016 Like C<sv_catpvf>, but also handles 'set' magic.
9022 Perl_sv_catpvf_mg(pTHX_ SV *sv, const char* pat, ...)
9025 va_start(args, pat);
9026 sv_vcatpvf_mg(sv, pat, &args);
9030 /* backend for C<catpvf_mg> and C<catpvf_mg_nocontext> */
9033 Perl_sv_vcatpvf_mg(pTHX_ SV *sv, const char* pat, va_list* args)
9035 sv_vcatpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
9040 =for apidoc sv_vsetpvfn
9042 Works like C<vcatpvfn> but copies the text into the SV instead of
9045 Usually used via one of its frontends C<sv_setpvf> and C<sv_setpvf_mg>.
9051 Perl_sv_vsetpvfn(pTHX_ SV *sv, const char *pat, STRLEN patlen, va_list *args, SV **svargs, I32 svmax, bool *maybe_tainted)
9053 sv_setpvn(sv, "", 0);
9054 sv_vcatpvfn(sv, pat, patlen, args, svargs, svmax, maybe_tainted);
9057 /* private function for use in sv_vcatpvfn via the EXPECT_NUMBER macro */
9060 S_expect_number(pTHX_ char** pattern)
9063 switch (**pattern) {
9064 case '1': case '2': case '3':
9065 case '4': case '5': case '6':
9066 case '7': case '8': case '9':
9067 while (isDIGIT(**pattern))
9068 var = var * 10 + (*(*pattern)++ - '0');
9072 #define EXPECT_NUMBER(pattern, var) (var = S_expect_number(aTHX_ &pattern))
9075 F0convert(NV nv, char *endbuf, STRLEN *len)
9086 if (uv & 1 && uv == nv)
9087 uv--; /* Round to even */
9089 unsigned dig = uv % 10;
9102 =for apidoc sv_vcatpvfn
9104 Processes its arguments like C<vsprintf> and appends the formatted output
9105 to an SV. Uses an array of SVs if the C style variable argument list is
9106 missing (NULL). When running with taint checks enabled, indicates via
9107 C<maybe_tainted> if results are untrustworthy (often due to the use of
9110 Usually used via one of its frontends C<sv_catpvf> and C<sv_catpvf_mg>.
9116 Perl_sv_vcatpvfn(pTHX_ SV *sv, const char *pat, STRLEN patlen, va_list *args, SV **svargs, I32 svmax, bool *maybe_tainted)
9123 static char nullstr[] = "(null)";
9125 bool has_utf8; /* has the result utf8? */
9126 bool pat_utf8; /* the pattern is in utf8? */
9128 /* Times 4: a decimal digit takes more than 3 binary digits.
9129 * NV_DIG: mantissa takes than many decimal digits.
9130 * Plus 32: Playing safe. */
9131 char ebuf[IV_DIG * 4 + NV_DIG + 32];
9132 /* large enough for "%#.#f" --chip */
9133 /* what about long double NVs? --jhi */
9135 has_utf8 = pat_utf8 = DO_UTF8(sv);
9137 /* no matter what, this is a string now */
9138 (void)SvPV_force(sv, origlen);
9140 /* special-case "", "%s", and "%_" */
9143 if (patlen == 2 && pat[0] == '%') {
9147 char *s = va_arg(*args, char*);
9148 sv_catpv(sv, s ? s : nullstr);
9150 else if (svix < svmax) {
9151 sv_catsv(sv, *svargs);
9152 if (DO_UTF8(*svargs))
9158 argsv = va_arg(*args, SV*);
9159 sv_catsv(sv, argsv);
9164 /* See comment on '_' below */
9169 #ifndef USE_LONG_DOUBLE
9170 /* special-case "%.<number>[gf]" */
9171 if ( patlen <= 5 && pat[0] == '%' && pat[1] == '.'
9172 && (pat[patlen-1] == 'g' || pat[patlen-1] == 'f') ) {
9173 unsigned digits = 0;
9177 while (*pp >= '0' && *pp <= '9')
9178 digits = 10 * digits + (*pp++ - '0');
9179 if (pp - pat == (int)patlen - 1) {
9183 nv = (NV)va_arg(*args, double);
9184 else if (svix < svmax)
9189 /* Add check for digits != 0 because it seems that some
9190 gconverts are buggy in this case, and we don't yet have
9191 a Configure test for this. */
9192 if (digits && digits < sizeof(ebuf) - NV_DIG - 10) {
9193 /* 0, point, slack */
9194 Gconvert(nv, (int)digits, 0, ebuf);
9196 if (*ebuf) /* May return an empty string for digits==0 */
9199 } else if (!digits) {
9202 if ((p = F0convert(nv, ebuf + sizeof ebuf, &l))) {
9203 sv_catpvn(sv, p, l);
9209 #endif /* !USE_LONG_DOUBLE */
9211 if (!args && svix < svmax && DO_UTF8(*svargs))
9214 patend = (char*)pat + patlen;
9215 for (p = (char*)pat; p < patend; p = q) {
9218 bool vectorize = FALSE;
9219 bool vectorarg = FALSE;
9220 bool vec_utf8 = FALSE;
9226 bool has_precis = FALSE;
9229 bool is_utf8 = FALSE; /* is this item utf8? */
9230 #ifdef HAS_LDBL_SPRINTF_BUG
9231 /* This is to try to fix a bug with irix/nonstop-ux/powerux and
9232 with sfio - Allen <allens@cpan.org> */
9233 bool fix_ldbl_sprintf_bug = FALSE;
9237 U8 utf8buf[UTF8_MAXLEN+1];
9238 STRLEN esignlen = 0;
9240 char *eptr = Nullch;
9243 U8 *vecstr = Null(U8*);
9250 /* we need a long double target in case HAS_LONG_DOUBLE but
9253 #if defined(HAS_LONG_DOUBLE) && LONG_DOUBLESIZE > DOUBLESIZE
9262 STRLEN dotstrlen = 1;
9263 I32 efix = 0; /* explicit format parameter index */
9264 I32 ewix = 0; /* explicit width index */
9265 I32 epix = 0; /* explicit precision index */
9266 I32 evix = 0; /* explicit vector index */
9267 bool asterisk = FALSE;
9269 /* echo everything up to the next format specification */
9270 for (q = p; q < patend && *q != '%'; ++q) ;
9272 if (has_utf8 && !pat_utf8)
9273 sv_catpvn_utf8_upgrade(sv, p, q - p, nsv);
9275 sv_catpvn(sv, p, q - p);
9282 We allow format specification elements in this order:
9283 \d+\$ explicit format parameter index
9285 v|\*(\d+\$)?v vector with optional (optionally specified) arg
9286 0 flag (as above): repeated to allow "v02"
9287 \d+|\*(\d+\$)? width using optional (optionally specified) arg
9288 \.(\d*|\*(\d+\$)?) precision using optional (optionally specified) arg
9290 [%bcdefginopsux_DFOUX] format (mandatory)
9292 if (EXPECT_NUMBER(q, width)) {
9333 if (EXPECT_NUMBER(q, ewix))
9342 if ((vectorarg = asterisk)) {
9354 EXPECT_NUMBER(q, width);
9359 vecsv = va_arg(*args, SV*);
9361 vecsv = (evix ? evix <= svmax : svix < svmax) ?
9362 svargs[evix ? evix-1 : svix++] : &PL_sv_undef;
9363 dotstr = SvPVx(vecsv, dotstrlen);
9368 vecsv = va_arg(*args, SV*);
9369 vecstr = (U8*)SvPVx(vecsv,veclen);
9370 vec_utf8 = DO_UTF8(vecsv);
9372 else if (efix ? efix <= svmax : svix < svmax) {
9373 vecsv = svargs[efix ? efix-1 : svix++];
9374 vecstr = (U8*)SvPVx(vecsv,veclen);
9375 vec_utf8 = DO_UTF8(vecsv);
9376 /* if this is a version object, we need to return the
9377 * stringified representation (which the SvPVX has
9378 * already done for us), but not vectorize the args
9380 if ( *q == 'd' && sv_derived_from(vecsv,"version") )
9382 q++; /* skip past the rest of the %vd format */
9383 eptr = (char *) vecstr;
9384 elen = strlen(eptr);
9397 i = va_arg(*args, int);
9399 i = (ewix ? ewix <= svmax : svix < svmax) ?
9400 SvIVx(svargs[ewix ? ewix-1 : svix++]) : 0;
9402 width = (i < 0) ? -i : i;
9412 if (EXPECT_NUMBER(q, epix) && *q++ != '$')
9414 /* XXX: todo, support specified precision parameter */
9418 i = va_arg(*args, int);
9420 i = (ewix ? ewix <= svmax : svix < svmax)
9421 ? SvIVx(svargs[ewix ? ewix-1 : svix++]) : 0;
9422 precis = (i < 0) ? 0 : i;
9427 precis = precis * 10 + (*q++ - '0');
9436 case 'I': /* Ix, I32x, and I64x */
9438 if (q[1] == '6' && q[2] == '4') {
9444 if (q[1] == '3' && q[2] == '2') {
9454 #if defined(HAS_QUAD) || defined(HAS_LONG_DOUBLE)
9465 #if defined(HAS_QUAD) || defined(HAS_LONG_DOUBLE)
9466 if (*(q + 1) == 'l') { /* lld, llf */
9491 argsv = (efix ? efix <= svmax : svix < svmax) ?
9492 svargs[efix ? efix-1 : svix++] : &PL_sv_undef;
9499 uv = (args && !vectorize) ? va_arg(*args, int) : SvIVx(argsv);
9501 (!UNI_IS_INVARIANT(uv) && SvUTF8(sv)))
9503 eptr = (char*)utf8buf;
9504 elen = uvchr_to_utf8((U8*)eptr, uv) - utf8buf;
9515 if (args && !vectorize) {
9516 eptr = va_arg(*args, char*);
9518 #ifdef MACOS_TRADITIONAL
9519 /* On MacOS, %#s format is used for Pascal strings */
9524 elen = strlen(eptr);
9527 elen = sizeof nullstr - 1;
9531 eptr = SvPVx(argsv, elen);
9532 if (DO_UTF8(argsv)) {
9533 if (has_precis && precis < elen) {
9535 sv_pos_u2b(argsv, &p, 0); /* sticks at end */
9538 if (width) { /* fudge width (can't fudge elen) */
9539 width += elen - sv_len_utf8(argsv);
9548 * The "%_" hack might have to be changed someday,
9549 * if ISO or ANSI decide to use '_' for something.
9550 * So we keep it hidden from users' code.
9552 if (!args || vectorize)
9554 argsv = va_arg(*args, SV*);
9555 eptr = SvPVx(argsv, elen);
9561 if (has_precis && elen > precis)
9568 if (alt || vectorize)
9570 uv = PTR2UV(args ? va_arg(*args, void*) : argsv);
9588 uv = utf8n_to_uvchr(vecstr, veclen, &ulen,
9597 esignbuf[esignlen++] = plus;
9601 case 'h': iv = (short)va_arg(*args, int); break;
9602 case 'l': iv = va_arg(*args, long); break;
9603 case 'V': iv = va_arg(*args, IV); break;
9604 default: iv = va_arg(*args, int); break;
9606 case 'q': iv = va_arg(*args, Quad_t); break;
9611 IV tiv = SvIVx(argsv); /* work around GCC bug #13488 */
9613 case 'h': iv = (short)tiv; break;
9614 case 'l': iv = (long)tiv; break;
9616 default: iv = tiv; break;
9618 case 'q': iv = (Quad_t)tiv; break;
9622 if ( !vectorize ) /* we already set uv above */
9627 esignbuf[esignlen++] = plus;
9631 esignbuf[esignlen++] = '-';
9674 uv = utf8n_to_uvchr(vecstr, veclen, &ulen,
9685 case 'h': uv = (unsigned short)va_arg(*args, unsigned); break;
9686 case 'l': uv = va_arg(*args, unsigned long); break;
9687 case 'V': uv = va_arg(*args, UV); break;
9688 default: uv = va_arg(*args, unsigned); break;
9690 case 'q': uv = va_arg(*args, Uquad_t); break;
9695 UV tuv = SvUVx(argsv); /* work around GCC bug #13488 */
9697 case 'h': uv = (unsigned short)tuv; break;
9698 case 'l': uv = (unsigned long)tuv; break;
9700 default: uv = tuv; break;
9702 case 'q': uv = (Uquad_t)tuv; break;
9708 eptr = ebuf + sizeof ebuf;
9714 p = (char*)((c == 'X')
9715 ? "0123456789ABCDEF" : "0123456789abcdef");
9721 esignbuf[esignlen++] = '0';
9722 esignbuf[esignlen++] = c; /* 'x' or 'X' */
9728 *--eptr = '0' + dig;
9730 if (alt && *eptr != '0')
9736 *--eptr = '0' + dig;
9739 esignbuf[esignlen++] = '0';
9740 esignbuf[esignlen++] = 'b';
9743 default: /* it had better be ten or less */
9744 #if defined(PERL_Y2KWARN)
9745 if (ckWARN(WARN_Y2K)) {
9747 char *s = SvPV(sv,n);
9748 if (n >= 2 && s[n-2] == '1' && s[n-1] == '9'
9749 && (n == 2 || !isDIGIT(s[n-3])))
9751 Perl_warner(aTHX_ packWARN(WARN_Y2K),
9752 "Possible Y2K bug: %%%c %s",
9753 c, "format string following '19'");
9759 *--eptr = '0' + dig;
9760 } while (uv /= base);
9763 elen = (ebuf + sizeof ebuf) - eptr;
9766 zeros = precis - elen;
9767 else if (precis == 0 && elen == 1 && *eptr == '0')
9772 /* FLOATING POINT */
9775 c = 'f'; /* maybe %F isn't supported here */
9781 /* This is evil, but floating point is even more evil */
9783 /* for SV-style calling, we can only get NV
9784 for C-style calling, we assume %f is double;
9785 for simplicity we allow any of %Lf, %llf, %qf for long double
9789 #if defined(USE_LONG_DOUBLE)
9793 /* [perl #20339] - we should accept and ignore %lf rather than die */
9797 #if defined(USE_LONG_DOUBLE)
9798 intsize = args ? 0 : 'q';
9802 #if defined(HAS_LONG_DOUBLE)
9811 /* now we need (long double) if intsize == 'q', else (double) */
9812 nv = (args && !vectorize) ?
9813 #if LONG_DOUBLESIZE > DOUBLESIZE
9815 va_arg(*args, long double) :
9816 va_arg(*args, double)
9818 va_arg(*args, double)
9824 if (c != 'e' && c != 'E') {
9826 /* FIXME: if HAS_LONG_DOUBLE but not USE_LONG_DOUBLE this
9827 will cast our (long double) to (double) */
9828 (void)Perl_frexp(nv, &i);
9829 if (i == PERL_INT_MIN)
9830 Perl_die(aTHX_ "panic: frexp");
9832 need = BIT_DIGITS(i);
9834 need += has_precis ? precis : 6; /* known default */
9839 #ifdef HAS_LDBL_SPRINTF_BUG
9840 /* This is to try to fix a bug with irix/nonstop-ux/powerux and
9841 with sfio - Allen <allens@cpan.org> */
9844 # define MY_DBL_MAX DBL_MAX
9845 # else /* XXX guessing! HUGE_VAL may be defined as infinity, so not using */
9846 # if DOUBLESIZE >= 8
9847 # define MY_DBL_MAX 1.7976931348623157E+308L
9849 # define MY_DBL_MAX 3.40282347E+38L
9853 # ifdef HAS_LDBL_SPRINTF_BUG_LESS1 /* only between -1L & 1L - Allen */
9854 # define MY_DBL_MAX_BUG 1L
9856 # define MY_DBL_MAX_BUG MY_DBL_MAX
9860 # define MY_DBL_MIN DBL_MIN
9861 # else /* XXX guessing! -Allen */
9862 # if DOUBLESIZE >= 8
9863 # define MY_DBL_MIN 2.2250738585072014E-308L
9865 # define MY_DBL_MIN 1.17549435E-38L
9869 if ((intsize == 'q') && (c == 'f') &&
9870 ((nv < MY_DBL_MAX_BUG) && (nv > -MY_DBL_MAX_BUG)) &&
9872 /* it's going to be short enough that
9873 * long double precision is not needed */
9875 if ((nv <= 0L) && (nv >= -0L))
9876 fix_ldbl_sprintf_bug = TRUE; /* 0 is 0 - easiest */
9878 /* would use Perl_fp_class as a double-check but not
9879 * functional on IRIX - see perl.h comments */
9881 if ((nv >= MY_DBL_MIN) || (nv <= -MY_DBL_MIN)) {
9882 /* It's within the range that a double can represent */
9883 #if defined(DBL_MAX) && !defined(DBL_MIN)
9884 if ((nv >= ((long double)1/DBL_MAX)) ||
9885 (nv <= (-(long double)1/DBL_MAX)))
9887 fix_ldbl_sprintf_bug = TRUE;
9890 if (fix_ldbl_sprintf_bug == TRUE) {
9900 # undef MY_DBL_MAX_BUG
9903 #endif /* HAS_LDBL_SPRINTF_BUG */
9905 need += 20; /* fudge factor */
9906 if (PL_efloatsize < need) {
9907 Safefree(PL_efloatbuf);
9908 PL_efloatsize = need + 20; /* more fudge */
9909 New(906, PL_efloatbuf, PL_efloatsize, char);
9910 PL_efloatbuf[0] = '\0';
9913 if ( !(width || left || plus || alt) && fill != '0'
9914 && has_precis && intsize != 'q' ) { /* Shortcuts */
9915 /* See earlier comment about buggy Gconvert when digits,
9917 if ( c == 'g' && precis) {
9918 Gconvert((NV)nv, (int)precis, 0, PL_efloatbuf);
9919 if (*PL_efloatbuf) /* May return an empty string for digits==0 */
9920 goto float_converted;
9921 } else if ( c == 'f' && !precis) {
9922 if ((eptr = F0convert(nv, ebuf + sizeof ebuf, &elen)))
9926 eptr = ebuf + sizeof ebuf;
9929 /* FIXME: what to do if HAS_LONG_DOUBLE but not PERL_PRIfldbl? */
9930 #if defined(HAS_LONG_DOUBLE) && defined(PERL_PRIfldbl)
9931 if (intsize == 'q') {
9932 /* Copy the one or more characters in a long double
9933 * format before the 'base' ([efgEFG]) character to
9934 * the format string. */
9935 static char const prifldbl[] = PERL_PRIfldbl;
9936 char const *p = prifldbl + sizeof(prifldbl) - 3;
9937 while (p >= prifldbl) { *--eptr = *p--; }
9942 do { *--eptr = '0' + (base % 10); } while (base /= 10);
9947 do { *--eptr = '0' + (base % 10); } while (base /= 10);
9959 /* No taint. Otherwise we are in the strange situation
9960 * where printf() taints but print($float) doesn't.
9962 #if defined(HAS_LONG_DOUBLE)
9964 (void)sprintf(PL_efloatbuf, eptr, nv);
9966 (void)sprintf(PL_efloatbuf, eptr, (double)nv);
9968 (void)sprintf(PL_efloatbuf, eptr, nv);
9971 eptr = PL_efloatbuf;
9972 elen = strlen(PL_efloatbuf);
9978 i = SvCUR(sv) - origlen;
9979 if (args && !vectorize) {
9981 case 'h': *(va_arg(*args, short*)) = i; break;
9982 default: *(va_arg(*args, int*)) = i; break;
9983 case 'l': *(va_arg(*args, long*)) = i; break;
9984 case 'V': *(va_arg(*args, IV*)) = i; break;
9986 case 'q': *(va_arg(*args, Quad_t*)) = i; break;
9991 sv_setuv_mg(argsv, (UV)i);
9993 continue; /* not "break" */
9999 if (!args && ckWARN(WARN_PRINTF) &&
10000 (PL_op->op_type == OP_PRTF || PL_op->op_type == OP_SPRINTF)) {
10001 SV *msg = sv_newmortal();
10002 Perl_sv_setpvf(aTHX_ msg, "Invalid conversion in %sprintf: ",
10003 (PL_op->op_type == OP_PRTF) ? "" : "s");
10006 Perl_sv_catpvf(aTHX_ msg,
10007 "\"%%%c\"", c & 0xFF);
10009 Perl_sv_catpvf(aTHX_ msg,
10010 "\"%%\\%03"UVof"\"",
10013 sv_catpv(msg, "end of string");
10014 Perl_warner(aTHX_ packWARN(WARN_PRINTF), "%"SVf, msg); /* yes, this is reentrant */
10017 /* output mangled stuff ... */
10023 /* ... right here, because formatting flags should not apply */
10024 SvGROW(sv, SvCUR(sv) + elen + 1);
10026 Copy(eptr, p, elen, char);
10029 SvCUR(sv) = p - SvPVX(sv);
10031 continue; /* not "break" */
10034 /* calculate width before utf8_upgrade changes it */
10035 have = esignlen + zeros + elen;
10037 if (is_utf8 != has_utf8) {
10040 sv_utf8_upgrade(sv);
10043 SV *nsv = sv_2mortal(newSVpvn(eptr, elen));
10044 sv_utf8_upgrade(nsv);
10048 SvGROW(sv, SvCUR(sv) + elen + 1);
10053 need = (have > width ? have : width);
10056 SvGROW(sv, SvCUR(sv) + need + dotstrlen + 1);
10058 if (esignlen && fill == '0') {
10059 for (i = 0; i < (int)esignlen; i++)
10060 *p++ = esignbuf[i];
10062 if (gap && !left) {
10063 memset(p, fill, gap);
10066 if (esignlen && fill != '0') {
10067 for (i = 0; i < (int)esignlen; i++)
10068 *p++ = esignbuf[i];
10071 for (i = zeros; i; i--)
10075 Copy(eptr, p, elen, char);
10079 memset(p, ' ', gap);
10084 Copy(dotstr, p, dotstrlen, char);
10088 vectorize = FALSE; /* done iterating over vecstr */
10095 SvCUR(sv) = p - SvPVX(sv);
10103 /* =========================================================================
10105 =head1 Cloning an interpreter
10107 All the macros and functions in this section are for the private use of
10108 the main function, perl_clone().
10110 The foo_dup() functions make an exact copy of an existing foo thinngy.
10111 During the course of a cloning, a hash table is used to map old addresses
10112 to new addresses. The table is created and manipulated with the
10113 ptr_table_* functions.
10117 ============================================================================*/
10120 #if defined(USE_ITHREADS)
10122 #ifndef GpREFCNT_inc
10123 # define GpREFCNT_inc(gp) ((gp) ? (++(gp)->gp_refcnt, (gp)) : (GP*)NULL)
10127 #define sv_dup_inc(s,t) SvREFCNT_inc(sv_dup(s,t))
10128 #define av_dup(s,t) (AV*)sv_dup((SV*)s,t)
10129 #define av_dup_inc(s,t) (AV*)SvREFCNT_inc(sv_dup((SV*)s,t))
10130 #define hv_dup(s,t) (HV*)sv_dup((SV*)s,t)
10131 #define hv_dup_inc(s,t) (HV*)SvREFCNT_inc(sv_dup((SV*)s,t))
10132 #define cv_dup(s,t) (CV*)sv_dup((SV*)s,t)
10133 #define cv_dup_inc(s,t) (CV*)SvREFCNT_inc(sv_dup((SV*)s,t))
10134 #define io_dup(s,t) (IO*)sv_dup((SV*)s,t)
10135 #define io_dup_inc(s,t) (IO*)SvREFCNT_inc(sv_dup((SV*)s,t))
10136 #define gv_dup(s,t) (GV*)sv_dup((SV*)s,t)
10137 #define gv_dup_inc(s,t) (GV*)SvREFCNT_inc(sv_dup((SV*)s,t))
10138 #define SAVEPV(p) (p ? savepv(p) : Nullch)
10139 #define SAVEPVN(p,n) (p ? savepvn(p,n) : Nullch)
10142 /* Duplicate a regexp. Required reading: pregcomp() and pregfree() in
10143 regcomp.c. AMS 20010712 */
10146 Perl_re_dup(pTHX_ REGEXP *r, CLONE_PARAMS *param)
10150 struct reg_substr_datum *s;
10153 return (REGEXP *)NULL;
10155 if ((ret = (REGEXP *)ptr_table_fetch(PL_ptr_table, r)))
10158 len = r->offsets[0];
10159 npar = r->nparens+1;
10161 Newc(0, ret, sizeof(regexp) + (len+1)*sizeof(regnode), char, regexp);
10162 Copy(r->program, ret->program, len+1, regnode);
10164 New(0, ret->startp, npar, I32);
10165 Copy(r->startp, ret->startp, npar, I32);
10166 New(0, ret->endp, npar, I32);
10167 Copy(r->startp, ret->startp, npar, I32);
10169 New(0, ret->substrs, 1, struct reg_substr_data);
10170 for (s = ret->substrs->data, i = 0; i < 3; i++, s++) {
10171 s->min_offset = r->substrs->data[i].min_offset;
10172 s->max_offset = r->substrs->data[i].max_offset;
10173 s->substr = sv_dup_inc(r->substrs->data[i].substr, param);
10174 s->utf8_substr = sv_dup_inc(r->substrs->data[i].utf8_substr, param);
10177 ret->regstclass = NULL;
10179 struct reg_data *d;
10180 int count = r->data->count;
10182 Newc(0, d, sizeof(struct reg_data) + count*sizeof(void *),
10183 char, struct reg_data);
10184 New(0, d->what, count, U8);
10187 for (i = 0; i < count; i++) {
10188 d->what[i] = r->data->what[i];
10189 switch (d->what[i]) {
10191 d->data[i] = sv_dup_inc((SV *)r->data->data[i], param);
10194 d->data[i] = av_dup_inc((AV *)r->data->data[i], param);
10197 /* This is cheating. */
10198 New(0, d->data[i], 1, struct regnode_charclass_class);
10199 StructCopy(r->data->data[i], d->data[i],
10200 struct regnode_charclass_class);
10201 ret->regstclass = (regnode*)d->data[i];
10204 /* Compiled op trees are readonly, and can thus be
10205 shared without duplication. */
10206 d->data[i] = (void*)OpREFCNT_inc((OP*)r->data->data[i]);
10209 d->data[i] = r->data->data[i];
10219 New(0, ret->offsets, 2*len+1, U32);
10220 Copy(r->offsets, ret->offsets, 2*len+1, U32);
10222 ret->precomp = SAVEPVN(r->precomp, r->prelen);
10223 ret->refcnt = r->refcnt;
10224 ret->minlen = r->minlen;
10225 ret->prelen = r->prelen;
10226 ret->nparens = r->nparens;
10227 ret->lastparen = r->lastparen;
10228 ret->lastcloseparen = r->lastcloseparen;
10229 ret->reganch = r->reganch;
10231 ret->sublen = r->sublen;
10233 if (RX_MATCH_COPIED(ret))
10234 ret->subbeg = SAVEPVN(r->subbeg, r->sublen);
10236 ret->subbeg = Nullch;
10237 #ifdef PERL_COPY_ON_WRITE
10238 ret->saved_copy = Nullsv;
10241 ptr_table_store(PL_ptr_table, r, ret);
10245 /* duplicate a file handle */
10248 Perl_fp_dup(pTHX_ PerlIO *fp, char type, CLONE_PARAMS *param)
10252 return (PerlIO*)NULL;
10254 /* look for it in the table first */
10255 ret = (PerlIO*)ptr_table_fetch(PL_ptr_table, fp);
10259 /* create anew and remember what it is */
10260 ret = PerlIO_fdupopen(aTHX_ fp, param, PERLIO_DUP_CLONE);
10261 ptr_table_store(PL_ptr_table, fp, ret);
10265 /* duplicate a directory handle */
10268 Perl_dirp_dup(pTHX_ DIR *dp)
10276 /* duplicate a typeglob */
10279 Perl_gp_dup(pTHX_ GP *gp, CLONE_PARAMS* param)
10284 /* look for it in the table first */
10285 ret = (GP*)ptr_table_fetch(PL_ptr_table, gp);
10289 /* create anew and remember what it is */
10290 Newz(0, ret, 1, GP);
10291 ptr_table_store(PL_ptr_table, gp, ret);
10294 ret->gp_refcnt = 0; /* must be before any other dups! */
10295 ret->gp_sv = sv_dup_inc(gp->gp_sv, param);
10296 ret->gp_io = io_dup_inc(gp->gp_io, param);
10297 ret->gp_form = cv_dup_inc(gp->gp_form, param);
10298 ret->gp_av = av_dup_inc(gp->gp_av, param);
10299 ret->gp_hv = hv_dup_inc(gp->gp_hv, param);
10300 ret->gp_egv = gv_dup(gp->gp_egv, param);/* GvEGV is not refcounted */
10301 ret->gp_cv = cv_dup_inc(gp->gp_cv, param);
10302 ret->gp_cvgen = gp->gp_cvgen;
10303 ret->gp_flags = gp->gp_flags;
10304 ret->gp_line = gp->gp_line;
10305 ret->gp_file = gp->gp_file; /* points to COP.cop_file */
10309 /* duplicate a chain of magic */
10312 Perl_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS* param)
10314 MAGIC *mgprev = (MAGIC*)NULL;
10317 return (MAGIC*)NULL;
10318 /* look for it in the table first */
10319 mgret = (MAGIC*)ptr_table_fetch(PL_ptr_table, mg);
10323 for (; mg; mg = mg->mg_moremagic) {
10325 Newz(0, nmg, 1, MAGIC);
10327 mgprev->mg_moremagic = nmg;
10330 nmg->mg_virtual = mg->mg_virtual; /* XXX copy dynamic vtable? */
10331 nmg->mg_private = mg->mg_private;
10332 nmg->mg_type = mg->mg_type;
10333 nmg->mg_flags = mg->mg_flags;
10334 if (mg->mg_type == PERL_MAGIC_qr) {
10335 nmg->mg_obj = (SV*)re_dup((REGEXP*)mg->mg_obj, param);
10337 else if(mg->mg_type == PERL_MAGIC_backref) {
10338 AV *av = (AV*) mg->mg_obj;
10341 SvREFCNT_inc(nmg->mg_obj = (SV*)newAV());
10343 for (i = AvFILLp(av); i >= 0; i--) {
10344 if (!svp[i]) continue;
10345 av_push((AV*)nmg->mg_obj,sv_dup(svp[i],param));
10349 nmg->mg_obj = (mg->mg_flags & MGf_REFCOUNTED)
10350 ? sv_dup_inc(mg->mg_obj, param)
10351 : sv_dup(mg->mg_obj, param);
10353 nmg->mg_len = mg->mg_len;
10354 nmg->mg_ptr = mg->mg_ptr; /* XXX random ptr? */
10355 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
10356 if (mg->mg_len > 0) {
10357 nmg->mg_ptr = SAVEPVN(mg->mg_ptr, mg->mg_len);
10358 if (mg->mg_type == PERL_MAGIC_overload_table &&
10359 AMT_AMAGIC((AMT*)mg->mg_ptr))
10361 AMT *amtp = (AMT*)mg->mg_ptr;
10362 AMT *namtp = (AMT*)nmg->mg_ptr;
10364 for (i = 1; i < NofAMmeth; i++) {
10365 namtp->table[i] = cv_dup_inc(amtp->table[i], param);
10369 else if (mg->mg_len == HEf_SVKEY)
10370 nmg->mg_ptr = (char*)sv_dup_inc((SV*)mg->mg_ptr, param);
10372 if ((mg->mg_flags & MGf_DUP) && mg->mg_virtual && mg->mg_virtual->svt_dup) {
10373 CALL_FPTR(nmg->mg_virtual->svt_dup)(aTHX_ nmg, param);
10380 /* create a new pointer-mapping table */
10383 Perl_ptr_table_new(pTHX)
10386 Newz(0, tbl, 1, PTR_TBL_t);
10387 tbl->tbl_max = 511;
10388 tbl->tbl_items = 0;
10389 Newz(0, tbl->tbl_ary, tbl->tbl_max + 1, PTR_TBL_ENT_t*);
10394 # define PTR_TABLE_HASH(ptr) (PTR2UV(ptr) >> 3)
10396 # define PTR_TABLE_HASH(ptr) (PTR2UV(ptr) >> 2)
10399 /* map an existing pointer using a table */
10402 Perl_ptr_table_fetch(pTHX_ PTR_TBL_t *tbl, void *sv)
10404 PTR_TBL_ENT_t *tblent;
10405 UV hash = PTR_TABLE_HASH(sv);
10407 tblent = tbl->tbl_ary[hash & tbl->tbl_max];
10408 for (; tblent; tblent = tblent->next) {
10409 if (tblent->oldval == sv)
10410 return tblent->newval;
10412 return (void*)NULL;
10415 /* add a new entry to a pointer-mapping table */
10418 Perl_ptr_table_store(pTHX_ PTR_TBL_t *tbl, void *oldv, void *newv)
10420 PTR_TBL_ENT_t *tblent, **otblent;
10421 /* XXX this may be pessimal on platforms where pointers aren't good
10422 * hash values e.g. if they grow faster in the most significant
10424 UV hash = PTR_TABLE_HASH(oldv);
10428 otblent = &tbl->tbl_ary[hash & tbl->tbl_max];
10429 for (tblent = *otblent; tblent; empty=0, tblent = tblent->next) {
10430 if (tblent->oldval == oldv) {
10431 tblent->newval = newv;
10435 Newz(0, tblent, 1, PTR_TBL_ENT_t);
10436 tblent->oldval = oldv;
10437 tblent->newval = newv;
10438 tblent->next = *otblent;
10441 if (!empty && tbl->tbl_items > tbl->tbl_max)
10442 ptr_table_split(tbl);
10445 /* double the hash bucket size of an existing ptr table */
10448 Perl_ptr_table_split(pTHX_ PTR_TBL_t *tbl)
10450 PTR_TBL_ENT_t **ary = tbl->tbl_ary;
10451 UV oldsize = tbl->tbl_max + 1;
10452 UV newsize = oldsize * 2;
10455 Renew(ary, newsize, PTR_TBL_ENT_t*);
10456 Zero(&ary[oldsize], newsize-oldsize, PTR_TBL_ENT_t*);
10457 tbl->tbl_max = --newsize;
10458 tbl->tbl_ary = ary;
10459 for (i=0; i < oldsize; i++, ary++) {
10460 PTR_TBL_ENT_t **curentp, **entp, *ent;
10463 curentp = ary + oldsize;
10464 for (entp = ary, ent = *ary; ent; ent = *entp) {
10465 if ((newsize & PTR_TABLE_HASH(ent->oldval)) != i) {
10467 ent->next = *curentp;
10477 /* remove all the entries from a ptr table */
10480 Perl_ptr_table_clear(pTHX_ PTR_TBL_t *tbl)
10482 register PTR_TBL_ENT_t **array;
10483 register PTR_TBL_ENT_t *entry;
10484 register PTR_TBL_ENT_t *oentry = Null(PTR_TBL_ENT_t*);
10488 if (!tbl || !tbl->tbl_items) {
10492 array = tbl->tbl_ary;
10494 max = tbl->tbl_max;
10499 entry = entry->next;
10503 if (++riter > max) {
10506 entry = array[riter];
10510 tbl->tbl_items = 0;
10513 /* clear and free a ptr table */
10516 Perl_ptr_table_free(pTHX_ PTR_TBL_t *tbl)
10521 ptr_table_clear(tbl);
10522 Safefree(tbl->tbl_ary);
10527 char *PL_watch_pvx;
10530 /* attempt to make everything in the typeglob readonly */
10533 S_gv_share(pTHX_ SV *sstr, CLONE_PARAMS *param)
10535 GV *gv = (GV*)sstr;
10536 SV *sv = ¶m->proto_perl->Isv_no; /* just need SvREADONLY-ness */
10538 if (GvIO(gv) || GvFORM(gv)) {
10539 GvUNIQUE_off(gv); /* GvIOs cannot be shared. nor can GvFORMs */
10541 else if (!GvCV(gv)) {
10542 GvCV(gv) = (CV*)sv;
10545 /* CvPADLISTs cannot be shared */
10546 if (!SvREADONLY(GvCV(gv)) && !CvXSUB(GvCV(gv))) {
10551 if (!GvUNIQUE(gv)) {
10553 PerlIO_printf(Perl_debug_log, "gv_share: unable to share %s::%s\n",
10554 HvNAME(GvSTASH(gv)), GvNAME(gv));
10560 * write attempts will die with
10561 * "Modification of a read-only value attempted"
10567 SvREADONLY_on(GvSV(gv));
10571 GvAV(gv) = (AV*)sv;
10574 SvREADONLY_on(GvAV(gv));
10578 GvHV(gv) = (HV*)sv;
10581 SvREADONLY_on(GvHV(gv));
10584 return sstr; /* he_dup() will SvREFCNT_inc() */
10587 /* duplicate an SV of any type (including AV, HV etc) */
10590 Perl_rvpv_dup(pTHX_ SV *dstr, SV *sstr, CLONE_PARAMS* param)
10593 SvRV(dstr) = SvWEAKREF(sstr)
10594 ? sv_dup(SvRV(sstr), param)
10595 : sv_dup_inc(SvRV(sstr), param);
10597 else if (SvPVX(sstr)) {
10598 /* Has something there */
10600 /* Normal PV - clone whole allocated space */
10601 SvPVX(dstr) = SAVEPVN(SvPVX(sstr), SvLEN(sstr)-1);
10602 if (SvREADONLY(sstr) && SvFAKE(sstr)) {
10603 /* Not that normal - actually sstr is copy on write.
10604 But we are a true, independant SV, so: */
10605 SvREADONLY_off(dstr);
10610 /* Special case - not normally malloced for some reason */
10611 if (SvREADONLY(sstr) && SvFAKE(sstr)) {
10612 /* A "shared" PV - clone it as unshared string */
10613 if(SvPADTMP(sstr)) {
10614 /* However, some of them live in the pad
10615 and they should not have these flags
10618 SvPVX(dstr) = sharepvn(SvPVX(sstr), SvCUR(sstr),
10620 SvUVX(dstr) = SvUVX(sstr);
10623 SvPVX(dstr) = SAVEPVN(SvPVX(sstr), SvCUR(sstr));
10625 SvREADONLY_off(dstr);
10629 /* Some other special case - random pointer */
10630 SvPVX(dstr) = SvPVX(sstr);
10635 /* Copy the Null */
10636 SvPVX(dstr) = SvPVX(sstr);
10641 Perl_sv_dup(pTHX_ SV *sstr, CLONE_PARAMS* param)
10645 if (!sstr || SvTYPE(sstr) == SVTYPEMASK)
10647 /* look for it in the table first */
10648 dstr = (SV*)ptr_table_fetch(PL_ptr_table, sstr);
10652 if(param->flags & CLONEf_JOIN_IN) {
10653 /** We are joining here so we don't want do clone
10654 something that is bad **/
10656 if(SvTYPE(sstr) == SVt_PVHV &&
10658 /** don't clone stashes if they already exist **/
10659 HV* old_stash = gv_stashpv(HvNAME(sstr),0);
10660 return (SV*) old_stash;
10664 /* create anew and remember what it is */
10666 ptr_table_store(PL_ptr_table, sstr, dstr);
10669 SvFLAGS(dstr) = SvFLAGS(sstr);
10670 SvFLAGS(dstr) &= ~SVf_OOK; /* don't propagate OOK hack */
10671 SvREFCNT(dstr) = 0; /* must be before any other dups! */
10674 if (SvANY(sstr) && PL_watch_pvx && SvPVX(sstr) == PL_watch_pvx)
10675 PerlIO_printf(Perl_debug_log, "watch at %p hit, found string \"%s\"\n",
10676 PL_watch_pvx, SvPVX(sstr));
10679 switch (SvTYPE(sstr)) {
10681 SvANY(dstr) = NULL;
10684 SvANY(dstr) = new_XIV();
10685 SvIVX(dstr) = SvIVX(sstr);
10688 SvANY(dstr) = new_XNV();
10689 SvNVX(dstr) = SvNVX(sstr);
10692 SvANY(dstr) = new_XRV();
10693 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
10696 SvANY(dstr) = new_XPV();
10697 SvCUR(dstr) = SvCUR(sstr);
10698 SvLEN(dstr) = SvLEN(sstr);
10699 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
10702 SvANY(dstr) = new_XPVIV();
10703 SvCUR(dstr) = SvCUR(sstr);
10704 SvLEN(dstr) = SvLEN(sstr);
10705 SvIVX(dstr) = SvIVX(sstr);
10706 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
10709 SvANY(dstr) = new_XPVNV();
10710 SvCUR(dstr) = SvCUR(sstr);
10711 SvLEN(dstr) = SvLEN(sstr);
10712 SvIVX(dstr) = SvIVX(sstr);
10713 SvNVX(dstr) = SvNVX(sstr);
10714 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
10717 SvANY(dstr) = new_XPVMG();
10718 SvCUR(dstr) = SvCUR(sstr);
10719 SvLEN(dstr) = SvLEN(sstr);
10720 SvIVX(dstr) = SvIVX(sstr);
10721 SvNVX(dstr) = SvNVX(sstr);
10722 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
10723 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
10724 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
10727 SvANY(dstr) = new_XPVBM();
10728 SvCUR(dstr) = SvCUR(sstr);
10729 SvLEN(dstr) = SvLEN(sstr);
10730 SvIVX(dstr) = SvIVX(sstr);
10731 SvNVX(dstr) = SvNVX(sstr);
10732 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
10733 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
10734 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
10735 BmRARE(dstr) = BmRARE(sstr);
10736 BmUSEFUL(dstr) = BmUSEFUL(sstr);
10737 BmPREVIOUS(dstr)= BmPREVIOUS(sstr);
10740 SvANY(dstr) = new_XPVLV();
10741 SvCUR(dstr) = SvCUR(sstr);
10742 SvLEN(dstr) = SvLEN(sstr);
10743 SvIVX(dstr) = SvIVX(sstr);
10744 SvNVX(dstr) = SvNVX(sstr);
10745 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
10746 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
10747 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
10748 LvTARGOFF(dstr) = LvTARGOFF(sstr); /* XXX sometimes holds PMOP* when DEBUGGING */
10749 LvTARGLEN(dstr) = LvTARGLEN(sstr);
10750 if (LvTYPE(sstr) == 't') /* for tie: unrefcnted fake (SV**) */
10751 LvTARG(dstr) = dstr;
10752 else if (LvTYPE(sstr) == 'T') /* for tie: fake HE */
10753 LvTARG(dstr) = (SV*)he_dup((HE*)LvTARG(sstr), 0, param);
10755 LvTARG(dstr) = sv_dup_inc(LvTARG(sstr), param);
10756 LvTYPE(dstr) = LvTYPE(sstr);
10759 if (GvUNIQUE((GV*)sstr)) {
10761 if ((share = gv_share(sstr, param))) {
10764 ptr_table_store(PL_ptr_table, sstr, dstr);
10766 PerlIO_printf(Perl_debug_log, "sv_dup: sharing %s::%s\n",
10767 HvNAME(GvSTASH(share)), GvNAME(share));
10772 SvANY(dstr) = new_XPVGV();
10773 SvCUR(dstr) = SvCUR(sstr);
10774 SvLEN(dstr) = SvLEN(sstr);
10775 SvIVX(dstr) = SvIVX(sstr);
10776 SvNVX(dstr) = SvNVX(sstr);
10777 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
10778 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
10779 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
10780 GvNAMELEN(dstr) = GvNAMELEN(sstr);
10781 GvNAME(dstr) = SAVEPVN(GvNAME(sstr), GvNAMELEN(sstr));
10782 GvSTASH(dstr) = hv_dup_inc(GvSTASH(sstr), param);
10783 GvFLAGS(dstr) = GvFLAGS(sstr);
10784 GvGP(dstr) = gp_dup(GvGP(sstr), param);
10785 (void)GpREFCNT_inc(GvGP(dstr));
10788 SvANY(dstr) = new_XPVIO();
10789 SvCUR(dstr) = SvCUR(sstr);
10790 SvLEN(dstr) = SvLEN(sstr);
10791 SvIVX(dstr) = SvIVX(sstr);
10792 SvNVX(dstr) = SvNVX(sstr);
10793 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
10794 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
10795 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
10796 IoIFP(dstr) = fp_dup(IoIFP(sstr), IoTYPE(sstr), param);
10797 if (IoOFP(sstr) == IoIFP(sstr))
10798 IoOFP(dstr) = IoIFP(dstr);
10800 IoOFP(dstr) = fp_dup(IoOFP(sstr), IoTYPE(sstr), param);
10801 /* PL_rsfp_filters entries have fake IoDIRP() */
10802 if (IoDIRP(sstr) && !(IoFLAGS(sstr) & IOf_FAKE_DIRP))
10803 IoDIRP(dstr) = dirp_dup(IoDIRP(sstr));
10805 IoDIRP(dstr) = IoDIRP(sstr);
10806 IoLINES(dstr) = IoLINES(sstr);
10807 IoPAGE(dstr) = IoPAGE(sstr);
10808 IoPAGE_LEN(dstr) = IoPAGE_LEN(sstr);
10809 IoLINES_LEFT(dstr) = IoLINES_LEFT(sstr);
10810 if(IoFLAGS(sstr) & IOf_FAKE_DIRP) {
10811 /* I have no idea why fake dirp (rsfps)
10812 should be treaded differently but otherwise
10813 we end up with leaks -- sky*/
10814 IoTOP_GV(dstr) = gv_dup_inc(IoTOP_GV(sstr), param);
10815 IoFMT_GV(dstr) = gv_dup_inc(IoFMT_GV(sstr), param);
10816 IoBOTTOM_GV(dstr) = gv_dup_inc(IoBOTTOM_GV(sstr), param);
10818 IoTOP_GV(dstr) = gv_dup(IoTOP_GV(sstr), param);
10819 IoFMT_GV(dstr) = gv_dup(IoFMT_GV(sstr), param);
10820 IoBOTTOM_GV(dstr) = gv_dup(IoBOTTOM_GV(sstr), param);
10822 IoTOP_NAME(dstr) = SAVEPV(IoTOP_NAME(sstr));
10823 IoFMT_NAME(dstr) = SAVEPV(IoFMT_NAME(sstr));
10824 IoBOTTOM_NAME(dstr) = SAVEPV(IoBOTTOM_NAME(sstr));
10825 IoSUBPROCESS(dstr) = IoSUBPROCESS(sstr);
10826 IoTYPE(dstr) = IoTYPE(sstr);
10827 IoFLAGS(dstr) = IoFLAGS(sstr);
10830 SvANY(dstr) = new_XPVAV();
10831 SvCUR(dstr) = SvCUR(sstr);
10832 SvLEN(dstr) = SvLEN(sstr);
10833 SvIVX(dstr) = SvIVX(sstr);
10834 SvNVX(dstr) = SvNVX(sstr);
10835 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
10836 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
10837 AvARYLEN((AV*)dstr) = sv_dup_inc(AvARYLEN((AV*)sstr), param);
10838 AvFLAGS((AV*)dstr) = AvFLAGS((AV*)sstr);
10839 if (AvARRAY((AV*)sstr)) {
10840 SV **dst_ary, **src_ary;
10841 SSize_t items = AvFILLp((AV*)sstr) + 1;
10843 src_ary = AvARRAY((AV*)sstr);
10844 Newz(0, dst_ary, AvMAX((AV*)sstr)+1, SV*);
10845 ptr_table_store(PL_ptr_table, src_ary, dst_ary);
10846 SvPVX(dstr) = (char*)dst_ary;
10847 AvALLOC((AV*)dstr) = dst_ary;
10848 if (AvREAL((AV*)sstr)) {
10849 while (items-- > 0)
10850 *dst_ary++ = sv_dup_inc(*src_ary++, param);
10853 while (items-- > 0)
10854 *dst_ary++ = sv_dup(*src_ary++, param);
10856 items = AvMAX((AV*)sstr) - AvFILLp((AV*)sstr);
10857 while (items-- > 0) {
10858 *dst_ary++ = &PL_sv_undef;
10862 SvPVX(dstr) = Nullch;
10863 AvALLOC((AV*)dstr) = (SV**)NULL;
10867 SvANY(dstr) = new_XPVHV();
10868 SvCUR(dstr) = SvCUR(sstr);
10869 SvLEN(dstr) = SvLEN(sstr);
10870 SvIVX(dstr) = SvIVX(sstr);
10871 SvNVX(dstr) = SvNVX(sstr);
10872 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
10873 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
10874 HvRITER((HV*)dstr) = HvRITER((HV*)sstr);
10875 if (HvARRAY((HV*)sstr)) {
10877 XPVHV *dxhv = (XPVHV*)SvANY(dstr);
10878 XPVHV *sxhv = (XPVHV*)SvANY(sstr);
10879 Newz(0, dxhv->xhv_array,
10880 PERL_HV_ARRAY_ALLOC_BYTES(dxhv->xhv_max+1), char);
10881 while (i <= sxhv->xhv_max) {
10882 ((HE**)dxhv->xhv_array)[i] = he_dup(((HE**)sxhv->xhv_array)[i],
10883 (bool)!!HvSHAREKEYS(sstr),
10887 dxhv->xhv_eiter = he_dup(sxhv->xhv_eiter,
10888 (bool)!!HvSHAREKEYS(sstr), param);
10891 SvPVX(dstr) = Nullch;
10892 HvEITER((HV*)dstr) = (HE*)NULL;
10894 HvPMROOT((HV*)dstr) = HvPMROOT((HV*)sstr); /* XXX */
10895 HvNAME((HV*)dstr) = SAVEPV(HvNAME((HV*)sstr));
10896 /* Record stashes for possible cloning in Perl_clone(). */
10897 if(HvNAME((HV*)dstr))
10898 av_push(param->stashes, dstr);
10901 SvANY(dstr) = new_XPVFM();
10902 FmLINES(dstr) = FmLINES(sstr);
10906 SvANY(dstr) = new_XPVCV();
10908 SvCUR(dstr) = SvCUR(sstr);
10909 SvLEN(dstr) = SvLEN(sstr);
10910 SvIVX(dstr) = SvIVX(sstr);
10911 SvNVX(dstr) = SvNVX(sstr);
10912 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
10913 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
10914 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
10915 CvSTASH(dstr) = hv_dup(CvSTASH(sstr), param); /* NOTE: not refcounted */
10916 CvSTART(dstr) = CvSTART(sstr);
10917 CvROOT(dstr) = OpREFCNT_inc(CvROOT(sstr));
10918 CvXSUB(dstr) = CvXSUB(sstr);
10919 CvXSUBANY(dstr) = CvXSUBANY(sstr);
10920 if (CvCONST(sstr)) {
10921 CvXSUBANY(dstr).any_ptr = GvUNIQUE(CvGV(sstr)) ?
10922 SvREFCNT_inc(CvXSUBANY(sstr).any_ptr) :
10923 sv_dup_inc(CvXSUBANY(sstr).any_ptr, param);
10925 /* don't dup if copying back - CvGV isn't refcounted, so the
10926 * duped GV may never be freed. A bit of a hack! DAPM */
10927 CvGV(dstr) = (param->flags & CLONEf_JOIN_IN) ?
10928 Nullgv : gv_dup(CvGV(sstr), param) ;
10929 if (param->flags & CLONEf_COPY_STACKS) {
10930 CvDEPTH(dstr) = CvDEPTH(sstr);
10934 PAD_DUP(CvPADLIST(dstr), CvPADLIST(sstr), param);
10935 CvOUTSIDE_SEQ(dstr) = CvOUTSIDE_SEQ(sstr);
10937 CvWEAKOUTSIDE(sstr)
10938 ? cv_dup( CvOUTSIDE(sstr), param)
10939 : cv_dup_inc(CvOUTSIDE(sstr), param);
10940 CvFLAGS(dstr) = CvFLAGS(sstr);
10941 CvFILE(dstr) = CvXSUB(sstr) ? CvFILE(sstr) : SAVEPV(CvFILE(sstr));
10944 Perl_croak(aTHX_ "Bizarre SvTYPE [%" IVdf "]", (IV)SvTYPE(sstr));
10948 if (SvOBJECT(dstr) && SvTYPE(dstr) != SVt_PVIO)
10954 /* duplicate a context */
10957 Perl_cx_dup(pTHX_ PERL_CONTEXT *cxs, I32 ix, I32 max, CLONE_PARAMS* param)
10959 PERL_CONTEXT *ncxs;
10962 return (PERL_CONTEXT*)NULL;
10964 /* look for it in the table first */
10965 ncxs = (PERL_CONTEXT*)ptr_table_fetch(PL_ptr_table, cxs);
10969 /* create anew and remember what it is */
10970 Newz(56, ncxs, max + 1, PERL_CONTEXT);
10971 ptr_table_store(PL_ptr_table, cxs, ncxs);
10974 PERL_CONTEXT *cx = &cxs[ix];
10975 PERL_CONTEXT *ncx = &ncxs[ix];
10976 ncx->cx_type = cx->cx_type;
10977 if (CxTYPE(cx) == CXt_SUBST) {
10978 Perl_croak(aTHX_ "Cloning substitution context is unimplemented");
10981 ncx->blk_oldsp = cx->blk_oldsp;
10982 ncx->blk_oldcop = cx->blk_oldcop;
10983 ncx->blk_oldmarksp = cx->blk_oldmarksp;
10984 ncx->blk_oldscopesp = cx->blk_oldscopesp;
10985 ncx->blk_oldpm = cx->blk_oldpm;
10986 ncx->blk_gimme = cx->blk_gimme;
10987 switch (CxTYPE(cx)) {
10989 ncx->blk_sub.cv = (cx->blk_sub.olddepth == 0
10990 ? cv_dup_inc(cx->blk_sub.cv, param)
10991 : cv_dup(cx->blk_sub.cv,param));
10992 ncx->blk_sub.argarray = (cx->blk_sub.hasargs
10993 ? av_dup_inc(cx->blk_sub.argarray, param)
10995 ncx->blk_sub.savearray = av_dup_inc(cx->blk_sub.savearray, param);
10996 ncx->blk_sub.olddepth = cx->blk_sub.olddepth;
10997 ncx->blk_sub.hasargs = cx->blk_sub.hasargs;
10998 ncx->blk_sub.lval = cx->blk_sub.lval;
10999 ncx->blk_sub.retop = cx->blk_sub.retop;
11002 ncx->blk_eval.old_in_eval = cx->blk_eval.old_in_eval;
11003 ncx->blk_eval.old_op_type = cx->blk_eval.old_op_type;
11004 ncx->blk_eval.old_namesv = sv_dup_inc(cx->blk_eval.old_namesv, param);
11005 ncx->blk_eval.old_eval_root = cx->blk_eval.old_eval_root;
11006 ncx->blk_eval.cur_text = sv_dup(cx->blk_eval.cur_text, param);
11007 ncx->blk_eval.retop = cx->blk_eval.retop;
11010 ncx->blk_loop.label = cx->blk_loop.label;
11011 ncx->blk_loop.resetsp = cx->blk_loop.resetsp;
11012 ncx->blk_loop.redo_op = cx->blk_loop.redo_op;
11013 ncx->blk_loop.next_op = cx->blk_loop.next_op;
11014 ncx->blk_loop.last_op = cx->blk_loop.last_op;
11015 ncx->blk_loop.iterdata = (CxPADLOOP(cx)
11016 ? cx->blk_loop.iterdata
11017 : gv_dup((GV*)cx->blk_loop.iterdata, param));
11018 ncx->blk_loop.oldcomppad
11019 = (PAD*)ptr_table_fetch(PL_ptr_table,
11020 cx->blk_loop.oldcomppad);
11021 ncx->blk_loop.itersave = sv_dup_inc(cx->blk_loop.itersave, param);
11022 ncx->blk_loop.iterlval = sv_dup_inc(cx->blk_loop.iterlval, param);
11023 ncx->blk_loop.iterary = av_dup_inc(cx->blk_loop.iterary, param);
11024 ncx->blk_loop.iterix = cx->blk_loop.iterix;
11025 ncx->blk_loop.itermax = cx->blk_loop.itermax;
11028 ncx->blk_sub.cv = cv_dup(cx->blk_sub.cv, param);
11029 ncx->blk_sub.gv = gv_dup(cx->blk_sub.gv, param);
11030 ncx->blk_sub.dfoutgv = gv_dup_inc(cx->blk_sub.dfoutgv, param);
11031 ncx->blk_sub.hasargs = cx->blk_sub.hasargs;
11032 ncx->blk_sub.retop = cx->blk_sub.retop;
11044 /* duplicate a stack info structure */
11047 Perl_si_dup(pTHX_ PERL_SI *si, CLONE_PARAMS* param)
11052 return (PERL_SI*)NULL;
11054 /* look for it in the table first */
11055 nsi = (PERL_SI*)ptr_table_fetch(PL_ptr_table, si);
11059 /* create anew and remember what it is */
11060 Newz(56, nsi, 1, PERL_SI);
11061 ptr_table_store(PL_ptr_table, si, nsi);
11063 nsi->si_stack = av_dup_inc(si->si_stack, param);
11064 nsi->si_cxix = si->si_cxix;
11065 nsi->si_cxmax = si->si_cxmax;
11066 nsi->si_cxstack = cx_dup(si->si_cxstack, si->si_cxix, si->si_cxmax, param);
11067 nsi->si_type = si->si_type;
11068 nsi->si_prev = si_dup(si->si_prev, param);
11069 nsi->si_next = si_dup(si->si_next, param);
11070 nsi->si_markoff = si->si_markoff;
11075 #define POPINT(ss,ix) ((ss)[--(ix)].any_i32)
11076 #define TOPINT(ss,ix) ((ss)[ix].any_i32)
11077 #define POPLONG(ss,ix) ((ss)[--(ix)].any_long)
11078 #define TOPLONG(ss,ix) ((ss)[ix].any_long)
11079 #define POPIV(ss,ix) ((ss)[--(ix)].any_iv)
11080 #define TOPIV(ss,ix) ((ss)[ix].any_iv)
11081 #define POPBOOL(ss,ix) ((ss)[--(ix)].any_bool)
11082 #define TOPBOOL(ss,ix) ((ss)[ix].any_bool)
11083 #define POPPTR(ss,ix) ((ss)[--(ix)].any_ptr)
11084 #define TOPPTR(ss,ix) ((ss)[ix].any_ptr)
11085 #define POPDPTR(ss,ix) ((ss)[--(ix)].any_dptr)
11086 #define TOPDPTR(ss,ix) ((ss)[ix].any_dptr)
11087 #define POPDXPTR(ss,ix) ((ss)[--(ix)].any_dxptr)
11088 #define TOPDXPTR(ss,ix) ((ss)[ix].any_dxptr)
11091 #define pv_dup_inc(p) SAVEPV(p)
11092 #define pv_dup(p) SAVEPV(p)
11093 #define svp_dup_inc(p,pp) any_dup(p,pp)
11095 /* map any object to the new equivent - either something in the
11096 * ptr table, or something in the interpreter structure
11100 Perl_any_dup(pTHX_ void *v, PerlInterpreter *proto_perl)
11105 return (void*)NULL;
11107 /* look for it in the table first */
11108 ret = ptr_table_fetch(PL_ptr_table, v);
11112 /* see if it is part of the interpreter structure */
11113 if (v >= (void*)proto_perl && v < (void*)(proto_perl+1))
11114 ret = (void*)(((char*)aTHX) + (((char*)v) - (char*)proto_perl));
11122 /* duplicate the save stack */
11125 Perl_ss_dup(pTHX_ PerlInterpreter *proto_perl, CLONE_PARAMS* param)
11127 ANY *ss = proto_perl->Tsavestack;
11128 I32 ix = proto_perl->Tsavestack_ix;
11129 I32 max = proto_perl->Tsavestack_max;
11142 void (*dptr) (void*);
11143 void (*dxptr) (pTHX_ void*);
11146 Newz(54, nss, max, ANY);
11150 TOPINT(nss,ix) = i;
11152 case SAVEt_ITEM: /* normal string */
11153 sv = (SV*)POPPTR(ss,ix);
11154 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
11155 sv = (SV*)POPPTR(ss,ix);
11156 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
11158 case SAVEt_SV: /* scalar reference */
11159 sv = (SV*)POPPTR(ss,ix);
11160 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
11161 gv = (GV*)POPPTR(ss,ix);
11162 TOPPTR(nss,ix) = gv_dup_inc(gv, param);
11164 case SAVEt_GENERIC_PVREF: /* generic char* */
11165 c = (char*)POPPTR(ss,ix);
11166 TOPPTR(nss,ix) = pv_dup(c);
11167 ptr = POPPTR(ss,ix);
11168 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11170 case SAVEt_SHARED_PVREF: /* char* in shared space */
11171 c = (char*)POPPTR(ss,ix);
11172 TOPPTR(nss,ix) = savesharedpv(c);
11173 ptr = POPPTR(ss,ix);
11174 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11176 case SAVEt_GENERIC_SVREF: /* generic sv */
11177 case SAVEt_SVREF: /* scalar reference */
11178 sv = (SV*)POPPTR(ss,ix);
11179 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
11180 ptr = POPPTR(ss,ix);
11181 TOPPTR(nss,ix) = svp_dup_inc((SV**)ptr, proto_perl);/* XXXXX */
11183 case SAVEt_AV: /* array reference */
11184 av = (AV*)POPPTR(ss,ix);
11185 TOPPTR(nss,ix) = av_dup_inc(av, param);
11186 gv = (GV*)POPPTR(ss,ix);
11187 TOPPTR(nss,ix) = gv_dup(gv, param);
11189 case SAVEt_HV: /* hash reference */
11190 hv = (HV*)POPPTR(ss,ix);
11191 TOPPTR(nss,ix) = hv_dup_inc(hv, param);
11192 gv = (GV*)POPPTR(ss,ix);
11193 TOPPTR(nss,ix) = gv_dup(gv, param);
11195 case SAVEt_INT: /* int reference */
11196 ptr = POPPTR(ss,ix);
11197 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11198 intval = (int)POPINT(ss,ix);
11199 TOPINT(nss,ix) = intval;
11201 case SAVEt_LONG: /* long reference */
11202 ptr = POPPTR(ss,ix);
11203 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11204 longval = (long)POPLONG(ss,ix);
11205 TOPLONG(nss,ix) = longval;
11207 case SAVEt_I32: /* I32 reference */
11208 case SAVEt_I16: /* I16 reference */
11209 case SAVEt_I8: /* I8 reference */
11210 ptr = POPPTR(ss,ix);
11211 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11213 TOPINT(nss,ix) = i;
11215 case SAVEt_IV: /* IV reference */
11216 ptr = POPPTR(ss,ix);
11217 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11219 TOPIV(nss,ix) = iv;
11221 case SAVEt_SPTR: /* SV* reference */
11222 ptr = POPPTR(ss,ix);
11223 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11224 sv = (SV*)POPPTR(ss,ix);
11225 TOPPTR(nss,ix) = sv_dup(sv, param);
11227 case SAVEt_VPTR: /* random* reference */
11228 ptr = POPPTR(ss,ix);
11229 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11230 ptr = POPPTR(ss,ix);
11231 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11233 case SAVEt_PPTR: /* char* reference */
11234 ptr = POPPTR(ss,ix);
11235 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11236 c = (char*)POPPTR(ss,ix);
11237 TOPPTR(nss,ix) = pv_dup(c);
11239 case SAVEt_HPTR: /* HV* reference */
11240 ptr = POPPTR(ss,ix);
11241 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11242 hv = (HV*)POPPTR(ss,ix);
11243 TOPPTR(nss,ix) = hv_dup(hv, param);
11245 case SAVEt_APTR: /* AV* reference */
11246 ptr = POPPTR(ss,ix);
11247 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11248 av = (AV*)POPPTR(ss,ix);
11249 TOPPTR(nss,ix) = av_dup(av, param);
11252 gv = (GV*)POPPTR(ss,ix);
11253 TOPPTR(nss,ix) = gv_dup(gv, param);
11255 case SAVEt_GP: /* scalar reference */
11256 gp = (GP*)POPPTR(ss,ix);
11257 TOPPTR(nss,ix) = gp = gp_dup(gp, param);
11258 (void)GpREFCNT_inc(gp);
11259 gv = (GV*)POPPTR(ss,ix);
11260 TOPPTR(nss,ix) = gv_dup_inc(gv, param);
11261 c = (char*)POPPTR(ss,ix);
11262 TOPPTR(nss,ix) = pv_dup(c);
11264 TOPIV(nss,ix) = iv;
11266 TOPIV(nss,ix) = iv;
11269 case SAVEt_MORTALIZESV:
11270 sv = (SV*)POPPTR(ss,ix);
11271 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
11274 ptr = POPPTR(ss,ix);
11275 if (ptr && (((OP*)ptr)->op_private & OPpREFCOUNTED)) {
11276 /* these are assumed to be refcounted properly */
11277 switch (((OP*)ptr)->op_type) {
11279 case OP_LEAVESUBLV:
11283 case OP_LEAVEWRITE:
11284 TOPPTR(nss,ix) = ptr;
11289 TOPPTR(nss,ix) = Nullop;
11294 TOPPTR(nss,ix) = Nullop;
11297 c = (char*)POPPTR(ss,ix);
11298 TOPPTR(nss,ix) = pv_dup_inc(c);
11300 case SAVEt_CLEARSV:
11301 longval = POPLONG(ss,ix);
11302 TOPLONG(nss,ix) = longval;
11305 hv = (HV*)POPPTR(ss,ix);
11306 TOPPTR(nss,ix) = hv_dup_inc(hv, param);
11307 c = (char*)POPPTR(ss,ix);
11308 TOPPTR(nss,ix) = pv_dup_inc(c);
11310 TOPINT(nss,ix) = i;
11312 case SAVEt_DESTRUCTOR:
11313 ptr = POPPTR(ss,ix);
11314 TOPPTR(nss,ix) = any_dup(ptr, proto_perl); /* XXX quite arbitrary */
11315 dptr = POPDPTR(ss,ix);
11316 TOPDPTR(nss,ix) = (void (*)(void*))any_dup((void *)dptr, proto_perl);
11318 case SAVEt_DESTRUCTOR_X:
11319 ptr = POPPTR(ss,ix);
11320 TOPPTR(nss,ix) = any_dup(ptr, proto_perl); /* XXX quite arbitrary */
11321 dxptr = POPDXPTR(ss,ix);
11322 TOPDXPTR(nss,ix) = (void (*)(pTHX_ void*))any_dup((void *)dxptr, proto_perl);
11324 case SAVEt_REGCONTEXT:
11327 TOPINT(nss,ix) = i;
11330 case SAVEt_STACK_POS: /* Position on Perl stack */
11332 TOPINT(nss,ix) = i;
11334 case SAVEt_AELEM: /* array element */
11335 sv = (SV*)POPPTR(ss,ix);
11336 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
11338 TOPINT(nss,ix) = i;
11339 av = (AV*)POPPTR(ss,ix);
11340 TOPPTR(nss,ix) = av_dup_inc(av, param);
11342 case SAVEt_HELEM: /* hash element */
11343 sv = (SV*)POPPTR(ss,ix);
11344 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
11345 sv = (SV*)POPPTR(ss,ix);
11346 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
11347 hv = (HV*)POPPTR(ss,ix);
11348 TOPPTR(nss,ix) = hv_dup_inc(hv, param);
11351 ptr = POPPTR(ss,ix);
11352 TOPPTR(nss,ix) = ptr;
11356 TOPINT(nss,ix) = i;
11358 case SAVEt_COMPPAD:
11359 av = (AV*)POPPTR(ss,ix);
11360 TOPPTR(nss,ix) = av_dup(av, param);
11363 longval = (long)POPLONG(ss,ix);
11364 TOPLONG(nss,ix) = longval;
11365 ptr = POPPTR(ss,ix);
11366 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11367 sv = (SV*)POPPTR(ss,ix);
11368 TOPPTR(nss,ix) = sv_dup(sv, param);
11371 ptr = POPPTR(ss,ix);
11372 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11373 longval = (long)POPBOOL(ss,ix);
11374 TOPBOOL(nss,ix) = (bool)longval;
11376 case SAVEt_SET_SVFLAGS:
11378 TOPINT(nss,ix) = i;
11380 TOPINT(nss,ix) = i;
11381 sv = (SV*)POPPTR(ss,ix);
11382 TOPPTR(nss,ix) = sv_dup(sv, param);
11385 Perl_croak(aTHX_ "panic: ss_dup inconsistency");
11393 =for apidoc perl_clone
11395 Create and return a new interpreter by cloning the current one.
11397 perl_clone takes these flags as parameters:
11399 CLONEf_COPY_STACKS - is used to, well, copy the stacks also,
11400 without it we only clone the data and zero the stacks,
11401 with it we copy the stacks and the new perl interpreter is
11402 ready to run at the exact same point as the previous one.
11403 The pseudo-fork code uses COPY_STACKS while the
11404 threads->new doesn't.
11406 CLONEf_KEEP_PTR_TABLE
11407 perl_clone keeps a ptr_table with the pointer of the old
11408 variable as a key and the new variable as a value,
11409 this allows it to check if something has been cloned and not
11410 clone it again but rather just use the value and increase the
11411 refcount. If KEEP_PTR_TABLE is not set then perl_clone will kill
11412 the ptr_table using the function
11413 C<ptr_table_free(PL_ptr_table); PL_ptr_table = NULL;>,
11414 reason to keep it around is if you want to dup some of your own
11415 variable who are outside the graph perl scans, example of this
11416 code is in threads.xs create
11419 This is a win32 thing, it is ignored on unix, it tells perls
11420 win32host code (which is c++) to clone itself, this is needed on
11421 win32 if you want to run two threads at the same time,
11422 if you just want to do some stuff in a separate perl interpreter
11423 and then throw it away and return to the original one,
11424 you don't need to do anything.
11429 /* XXX the above needs expanding by someone who actually understands it ! */
11430 EXTERN_C PerlInterpreter *
11431 perl_clone_host(PerlInterpreter* proto_perl, UV flags);
11434 perl_clone(PerlInterpreter *proto_perl, UV flags)
11436 #ifdef PERL_IMPLICIT_SYS
11438 /* perlhost.h so we need to call into it
11439 to clone the host, CPerlHost should have a c interface, sky */
11441 if (flags & CLONEf_CLONE_HOST) {
11442 return perl_clone_host(proto_perl,flags);
11444 return perl_clone_using(proto_perl, flags,
11446 proto_perl->IMemShared,
11447 proto_perl->IMemParse,
11449 proto_perl->IStdIO,
11453 proto_perl->IProc);
11457 perl_clone_using(PerlInterpreter *proto_perl, UV flags,
11458 struct IPerlMem* ipM, struct IPerlMem* ipMS,
11459 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
11460 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
11461 struct IPerlDir* ipD, struct IPerlSock* ipS,
11462 struct IPerlProc* ipP)
11464 /* XXX many of the string copies here can be optimized if they're
11465 * constants; they need to be allocated as common memory and just
11466 * their pointers copied. */
11469 CLONE_PARAMS clone_params;
11470 CLONE_PARAMS* param = &clone_params;
11472 PerlInterpreter *my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
11473 PERL_SET_THX(my_perl);
11476 Poison(my_perl, 1, PerlInterpreter);
11480 PL_savestack_ix = 0;
11481 PL_savestack_max = -1;
11482 PL_sig_pending = 0;
11483 Zero(&PL_debug_pad, 1, struct perl_debug_pad);
11484 # else /* !DEBUGGING */
11485 Zero(my_perl, 1, PerlInterpreter);
11486 # endif /* DEBUGGING */
11488 /* host pointers */
11490 PL_MemShared = ipMS;
11491 PL_MemParse = ipMP;
11498 #else /* !PERL_IMPLICIT_SYS */
11500 CLONE_PARAMS clone_params;
11501 CLONE_PARAMS* param = &clone_params;
11502 PerlInterpreter *my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
11503 PERL_SET_THX(my_perl);
11508 Poison(my_perl, 1, PerlInterpreter);
11512 PL_savestack_ix = 0;
11513 PL_savestack_max = -1;
11514 PL_sig_pending = 0;
11515 Zero(&PL_debug_pad, 1, struct perl_debug_pad);
11516 # else /* !DEBUGGING */
11517 Zero(my_perl, 1, PerlInterpreter);
11518 # endif /* DEBUGGING */
11519 #endif /* PERL_IMPLICIT_SYS */
11520 param->flags = flags;
11521 param->proto_perl = proto_perl;
11524 PL_xiv_arenaroot = NULL;
11525 PL_xiv_root = NULL;
11526 PL_xnv_arenaroot = NULL;
11527 PL_xnv_root = NULL;
11528 PL_xrv_arenaroot = NULL;
11529 PL_xrv_root = NULL;
11530 PL_xpv_arenaroot = NULL;
11531 PL_xpv_root = NULL;
11532 PL_xpviv_arenaroot = NULL;
11533 PL_xpviv_root = NULL;
11534 PL_xpvnv_arenaroot = NULL;
11535 PL_xpvnv_root = NULL;
11536 PL_xpvcv_arenaroot = NULL;
11537 PL_xpvcv_root = NULL;
11538 PL_xpvav_arenaroot = NULL;
11539 PL_xpvav_root = NULL;
11540 PL_xpvhv_arenaroot = NULL;
11541 PL_xpvhv_root = NULL;
11542 PL_xpvmg_arenaroot = NULL;
11543 PL_xpvmg_root = NULL;
11544 PL_xpvlv_arenaroot = NULL;
11545 PL_xpvlv_root = NULL;
11546 PL_xpvbm_arenaroot = NULL;
11547 PL_xpvbm_root = NULL;
11548 PL_he_arenaroot = NULL;
11550 PL_nice_chunk = NULL;
11551 PL_nice_chunk_size = 0;
11553 PL_sv_objcount = 0;
11554 PL_sv_root = Nullsv;
11555 PL_sv_arenaroot = Nullsv;
11557 PL_debug = proto_perl->Idebug;
11559 #ifdef USE_REENTRANT_API
11560 /* XXX: things like -Dm will segfault here in perlio, but doing
11561 * PERL_SET_CONTEXT(proto_perl);
11562 * breaks too many other things
11564 Perl_reentrant_init(aTHX);
11567 /* create SV map for pointer relocation */
11568 PL_ptr_table = ptr_table_new();
11570 /* initialize these special pointers as early as possible */
11571 SvANY(&PL_sv_undef) = NULL;
11572 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
11573 SvFLAGS(&PL_sv_undef) = SVf_READONLY|SVt_NULL;
11574 ptr_table_store(PL_ptr_table, &proto_perl->Isv_undef, &PL_sv_undef);
11576 SvANY(&PL_sv_no) = new_XPVNV();
11577 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
11578 SvFLAGS(&PL_sv_no) = SVp_NOK|SVf_NOK|SVp_POK|SVf_POK|SVf_READONLY|SVt_PVNV;
11579 SvPVX(&PL_sv_no) = SAVEPVN(PL_No, 0);
11580 SvCUR(&PL_sv_no) = 0;
11581 SvLEN(&PL_sv_no) = 1;
11582 SvNVX(&PL_sv_no) = 0;
11583 ptr_table_store(PL_ptr_table, &proto_perl->Isv_no, &PL_sv_no);
11585 SvANY(&PL_sv_yes) = new_XPVNV();
11586 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
11587 SvFLAGS(&PL_sv_yes) = SVp_NOK|SVf_NOK|SVp_POK|SVf_POK|SVf_READONLY|SVt_PVNV;
11588 SvPVX(&PL_sv_yes) = SAVEPVN(PL_Yes, 1);
11589 SvCUR(&PL_sv_yes) = 1;
11590 SvLEN(&PL_sv_yes) = 2;
11591 SvNVX(&PL_sv_yes) = 1;
11592 ptr_table_store(PL_ptr_table, &proto_perl->Isv_yes, &PL_sv_yes);
11594 /* create (a non-shared!) shared string table */
11595 PL_strtab = newHV();
11596 HvSHAREKEYS_off(PL_strtab);
11597 hv_ksplit(PL_strtab, 512);
11598 ptr_table_store(PL_ptr_table, proto_perl->Istrtab, PL_strtab);
11600 PL_compiling = proto_perl->Icompiling;
11602 /* These two PVs will be free'd special way so must set them same way op.c does */
11603 PL_compiling.cop_stashpv = savesharedpv(PL_compiling.cop_stashpv);
11604 ptr_table_store(PL_ptr_table, proto_perl->Icompiling.cop_stashpv, PL_compiling.cop_stashpv);
11606 PL_compiling.cop_file = savesharedpv(PL_compiling.cop_file);
11607 ptr_table_store(PL_ptr_table, proto_perl->Icompiling.cop_file, PL_compiling.cop_file);
11609 ptr_table_store(PL_ptr_table, &proto_perl->Icompiling, &PL_compiling);
11610 if (!specialWARN(PL_compiling.cop_warnings))
11611 PL_compiling.cop_warnings = sv_dup_inc(PL_compiling.cop_warnings, param);
11612 if (!specialCopIO(PL_compiling.cop_io))
11613 PL_compiling.cop_io = sv_dup_inc(PL_compiling.cop_io, param);
11614 PL_curcop = (COP*)any_dup(proto_perl->Tcurcop, proto_perl);
11616 /* pseudo environmental stuff */
11617 PL_origargc = proto_perl->Iorigargc;
11618 PL_origargv = proto_perl->Iorigargv;
11620 param->stashes = newAV(); /* Setup array of objects to call clone on */
11622 #ifdef PERLIO_LAYERS
11623 /* Clone PerlIO tables as soon as we can handle general xx_dup() */
11624 PerlIO_clone(aTHX_ proto_perl, param);
11627 PL_envgv = gv_dup(proto_perl->Ienvgv, param);
11628 PL_incgv = gv_dup(proto_perl->Iincgv, param);
11629 PL_hintgv = gv_dup(proto_perl->Ihintgv, param);
11630 PL_origfilename = SAVEPV(proto_perl->Iorigfilename);
11631 PL_diehook = sv_dup_inc(proto_perl->Idiehook, param);
11632 PL_warnhook = sv_dup_inc(proto_perl->Iwarnhook, param);
11635 PL_minus_c = proto_perl->Iminus_c;
11636 PL_patchlevel = sv_dup_inc(proto_perl->Ipatchlevel, param);
11637 PL_localpatches = proto_perl->Ilocalpatches;
11638 PL_splitstr = proto_perl->Isplitstr;
11639 PL_preprocess = proto_perl->Ipreprocess;
11640 PL_minus_n = proto_perl->Iminus_n;
11641 PL_minus_p = proto_perl->Iminus_p;
11642 PL_minus_l = proto_perl->Iminus_l;
11643 PL_minus_a = proto_perl->Iminus_a;
11644 PL_minus_F = proto_perl->Iminus_F;
11645 PL_doswitches = proto_perl->Idoswitches;
11646 PL_dowarn = proto_perl->Idowarn;
11647 PL_doextract = proto_perl->Idoextract;
11648 PL_sawampersand = proto_perl->Isawampersand;
11649 PL_unsafe = proto_perl->Iunsafe;
11650 PL_inplace = SAVEPV(proto_perl->Iinplace);
11651 PL_e_script = sv_dup_inc(proto_perl->Ie_script, param);
11652 PL_perldb = proto_perl->Iperldb;
11653 PL_perl_destruct_level = proto_perl->Iperl_destruct_level;
11654 PL_exit_flags = proto_perl->Iexit_flags;
11656 /* magical thingies */
11657 /* XXX time(&PL_basetime) when asked for? */
11658 PL_basetime = proto_perl->Ibasetime;
11659 PL_formfeed = sv_dup(proto_perl->Iformfeed, param);
11661 PL_maxsysfd = proto_perl->Imaxsysfd;
11662 PL_multiline = proto_perl->Imultiline;
11663 PL_statusvalue = proto_perl->Istatusvalue;
11665 PL_statusvalue_vms = proto_perl->Istatusvalue_vms;
11667 PL_encoding = sv_dup(proto_perl->Iencoding, param);
11669 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
11670 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
11671 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
11673 /* Clone the regex array */
11674 PL_regex_padav = newAV();
11676 I32 len = av_len((AV*)proto_perl->Iregex_padav);
11677 SV** regexen = AvARRAY((AV*)proto_perl->Iregex_padav);
11678 av_push(PL_regex_padav,
11679 sv_dup_inc(regexen[0],param));
11680 for(i = 1; i <= len; i++) {
11681 if(SvREPADTMP(regexen[i])) {
11682 av_push(PL_regex_padav, sv_dup_inc(regexen[i], param));
11684 av_push(PL_regex_padav,
11686 newSViv(PTR2IV(re_dup(INT2PTR(REGEXP *,
11687 SvIVX(regexen[i])), param)))
11692 PL_regex_pad = AvARRAY(PL_regex_padav);
11694 /* shortcuts to various I/O objects */
11695 PL_stdingv = gv_dup(proto_perl->Istdingv, param);
11696 PL_stderrgv = gv_dup(proto_perl->Istderrgv, param);
11697 PL_defgv = gv_dup(proto_perl->Idefgv, param);
11698 PL_argvgv = gv_dup(proto_perl->Iargvgv, param);
11699 PL_argvoutgv = gv_dup(proto_perl->Iargvoutgv, param);
11700 PL_argvout_stack = av_dup_inc(proto_perl->Iargvout_stack, param);
11702 /* shortcuts to regexp stuff */
11703 PL_replgv = gv_dup(proto_perl->Ireplgv, param);
11705 /* shortcuts to misc objects */
11706 PL_errgv = gv_dup(proto_perl->Ierrgv, param);
11708 /* shortcuts to debugging objects */
11709 PL_DBgv = gv_dup(proto_perl->IDBgv, param);
11710 PL_DBline = gv_dup(proto_perl->IDBline, param);
11711 PL_DBsub = gv_dup(proto_perl->IDBsub, param);
11712 PL_DBsingle = sv_dup(proto_perl->IDBsingle, param);
11713 PL_DBtrace = sv_dup(proto_perl->IDBtrace, param);
11714 PL_DBsignal = sv_dup(proto_perl->IDBsignal, param);
11715 PL_DBassertion = sv_dup(proto_perl->IDBassertion, param);
11716 PL_lineary = av_dup(proto_perl->Ilineary, param);
11717 PL_dbargs = av_dup(proto_perl->Idbargs, param);
11719 /* symbol tables */
11720 PL_defstash = hv_dup_inc(proto_perl->Tdefstash, param);
11721 PL_curstash = hv_dup(proto_perl->Tcurstash, param);
11722 PL_debstash = hv_dup(proto_perl->Idebstash, param);
11723 PL_globalstash = hv_dup(proto_perl->Iglobalstash, param);
11724 PL_curstname = sv_dup_inc(proto_perl->Icurstname, param);
11726 PL_beginav = av_dup_inc(proto_perl->Ibeginav, param);
11727 PL_beginav_save = av_dup_inc(proto_perl->Ibeginav_save, param);
11728 PL_checkav_save = av_dup_inc(proto_perl->Icheckav_save, param);
11729 PL_endav = av_dup_inc(proto_perl->Iendav, param);
11730 PL_checkav = av_dup_inc(proto_perl->Icheckav, param);
11731 PL_initav = av_dup_inc(proto_perl->Iinitav, param);
11733 PL_sub_generation = proto_perl->Isub_generation;
11735 /* funky return mechanisms */
11736 PL_forkprocess = proto_perl->Iforkprocess;
11738 /* subprocess state */
11739 PL_fdpid = av_dup_inc(proto_perl->Ifdpid, param);
11741 /* internal state */
11742 PL_tainting = proto_perl->Itainting;
11743 PL_taint_warn = proto_perl->Itaint_warn;
11744 PL_maxo = proto_perl->Imaxo;
11745 if (proto_perl->Iop_mask)
11746 PL_op_mask = SAVEPVN(proto_perl->Iop_mask, PL_maxo);
11748 PL_op_mask = Nullch;
11749 /* PL_asserting = proto_perl->Iasserting; */
11751 /* current interpreter roots */
11752 PL_main_cv = cv_dup_inc(proto_perl->Imain_cv, param);
11753 PL_main_root = OpREFCNT_inc(proto_perl->Imain_root);
11754 PL_main_start = proto_perl->Imain_start;
11755 PL_eval_root = proto_perl->Ieval_root;
11756 PL_eval_start = proto_perl->Ieval_start;
11758 /* runtime control stuff */
11759 PL_curcopdb = (COP*)any_dup(proto_perl->Icurcopdb, proto_perl);
11760 PL_copline = proto_perl->Icopline;
11762 PL_filemode = proto_perl->Ifilemode;
11763 PL_lastfd = proto_perl->Ilastfd;
11764 PL_oldname = proto_perl->Ioldname; /* XXX not quite right */
11767 PL_gensym = proto_perl->Igensym;
11768 PL_preambled = proto_perl->Ipreambled;
11769 PL_preambleav = av_dup_inc(proto_perl->Ipreambleav, param);
11770 PL_laststatval = proto_perl->Ilaststatval;
11771 PL_laststype = proto_perl->Ilaststype;
11772 PL_mess_sv = Nullsv;
11774 PL_ors_sv = sv_dup_inc(proto_perl->Iors_sv, param);
11775 PL_ofmt = SAVEPV(proto_perl->Iofmt);
11777 /* interpreter atexit processing */
11778 PL_exitlistlen = proto_perl->Iexitlistlen;
11779 if (PL_exitlistlen) {
11780 New(0, PL_exitlist, PL_exitlistlen, PerlExitListEntry);
11781 Copy(proto_perl->Iexitlist, PL_exitlist, PL_exitlistlen, PerlExitListEntry);
11784 PL_exitlist = (PerlExitListEntry*)NULL;
11785 PL_modglobal = hv_dup_inc(proto_perl->Imodglobal, param);
11786 PL_custom_op_names = hv_dup_inc(proto_perl->Icustom_op_names,param);
11787 PL_custom_op_descs = hv_dup_inc(proto_perl->Icustom_op_descs,param);
11789 PL_profiledata = NULL;
11790 PL_rsfp = fp_dup(proto_perl->Irsfp, '<', param);
11791 /* PL_rsfp_filters entries have fake IoDIRP() */
11792 PL_rsfp_filters = av_dup_inc(proto_perl->Irsfp_filters, param);
11794 PL_compcv = cv_dup(proto_perl->Icompcv, param);
11796 PAD_CLONE_VARS(proto_perl, param);
11798 #ifdef HAVE_INTERP_INTERN
11799 sys_intern_dup(&proto_perl->Isys_intern, &PL_sys_intern);
11802 /* more statics moved here */
11803 PL_generation = proto_perl->Igeneration;
11804 PL_DBcv = cv_dup(proto_perl->IDBcv, param);
11806 PL_in_clean_objs = proto_perl->Iin_clean_objs;
11807 PL_in_clean_all = proto_perl->Iin_clean_all;
11809 PL_uid = proto_perl->Iuid;
11810 PL_euid = proto_perl->Ieuid;
11811 PL_gid = proto_perl->Igid;
11812 PL_egid = proto_perl->Iegid;
11813 PL_nomemok = proto_perl->Inomemok;
11814 PL_an = proto_perl->Ian;
11815 PL_evalseq = proto_perl->Ievalseq;
11816 PL_origenviron = proto_perl->Iorigenviron; /* XXX not quite right */
11817 PL_origalen = proto_perl->Iorigalen;
11818 PL_pidstatus = newHV(); /* XXX flag for cloning? */
11819 PL_osname = SAVEPV(proto_perl->Iosname);
11820 PL_sh_path_compat = proto_perl->Ish_path_compat; /* XXX never deallocated */
11821 PL_sighandlerp = proto_perl->Isighandlerp;
11824 PL_runops = proto_perl->Irunops;
11826 Copy(proto_perl->Itokenbuf, PL_tokenbuf, 256, char);
11829 PL_cshlen = proto_perl->Icshlen;
11830 PL_cshname = proto_perl->Icshname; /* XXX never deallocated */
11833 PL_lex_state = proto_perl->Ilex_state;
11834 PL_lex_defer = proto_perl->Ilex_defer;
11835 PL_lex_expect = proto_perl->Ilex_expect;
11836 PL_lex_formbrack = proto_perl->Ilex_formbrack;
11837 PL_lex_dojoin = proto_perl->Ilex_dojoin;
11838 PL_lex_starts = proto_perl->Ilex_starts;
11839 PL_lex_stuff = sv_dup_inc(proto_perl->Ilex_stuff, param);
11840 PL_lex_repl = sv_dup_inc(proto_perl->Ilex_repl, param);
11841 PL_lex_op = proto_perl->Ilex_op;
11842 PL_lex_inpat = proto_perl->Ilex_inpat;
11843 PL_lex_inwhat = proto_perl->Ilex_inwhat;
11844 PL_lex_brackets = proto_perl->Ilex_brackets;
11845 i = (PL_lex_brackets < 120 ? 120 : PL_lex_brackets);
11846 PL_lex_brackstack = SAVEPVN(proto_perl->Ilex_brackstack,i);
11847 PL_lex_casemods = proto_perl->Ilex_casemods;
11848 i = (PL_lex_casemods < 12 ? 12 : PL_lex_casemods);
11849 PL_lex_casestack = SAVEPVN(proto_perl->Ilex_casestack,i);
11851 Copy(proto_perl->Inextval, PL_nextval, 5, YYSTYPE);
11852 Copy(proto_perl->Inexttype, PL_nexttype, 5, I32);
11853 PL_nexttoke = proto_perl->Inexttoke;
11855 /* XXX This is probably masking the deeper issue of why
11856 * SvANY(proto_perl->Ilinestr) can be NULL at this point. For test case:
11857 * http://archive.develooper.com/perl5-porters%40perl.org/msg83298.html
11858 * (A little debugging with a watchpoint on it may help.)
11860 if (SvANY(proto_perl->Ilinestr)) {
11861 PL_linestr = sv_dup_inc(proto_perl->Ilinestr, param);
11862 i = proto_perl->Ibufptr - SvPVX(proto_perl->Ilinestr);
11863 PL_bufptr = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
11864 i = proto_perl->Ioldbufptr - SvPVX(proto_perl->Ilinestr);
11865 PL_oldbufptr = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
11866 i = proto_perl->Ioldoldbufptr - SvPVX(proto_perl->Ilinestr);
11867 PL_oldoldbufptr = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
11868 i = proto_perl->Ilinestart - SvPVX(proto_perl->Ilinestr);
11869 PL_linestart = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
11872 PL_linestr = NEWSV(65,79);
11873 sv_upgrade(PL_linestr,SVt_PVIV);
11874 sv_setpvn(PL_linestr,"",0);
11875 PL_bufptr = PL_oldbufptr = PL_oldoldbufptr = PL_linestart = SvPVX(PL_linestr);
11877 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
11878 PL_pending_ident = proto_perl->Ipending_ident;
11879 PL_sublex_info = proto_perl->Isublex_info; /* XXX not quite right */
11881 PL_expect = proto_perl->Iexpect;
11883 PL_multi_start = proto_perl->Imulti_start;
11884 PL_multi_end = proto_perl->Imulti_end;
11885 PL_multi_open = proto_perl->Imulti_open;
11886 PL_multi_close = proto_perl->Imulti_close;
11888 PL_error_count = proto_perl->Ierror_count;
11889 PL_subline = proto_perl->Isubline;
11890 PL_subname = sv_dup_inc(proto_perl->Isubname, param);
11892 /* XXX See comment on SvANY(proto_perl->Ilinestr) above */
11893 if (SvANY(proto_perl->Ilinestr)) {
11894 i = proto_perl->Ilast_uni - SvPVX(proto_perl->Ilinestr);
11895 PL_last_uni = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
11896 i = proto_perl->Ilast_lop - SvPVX(proto_perl->Ilinestr);
11897 PL_last_lop = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
11898 PL_last_lop_op = proto_perl->Ilast_lop_op;
11901 PL_last_uni = SvPVX(PL_linestr);
11902 PL_last_lop = SvPVX(PL_linestr);
11903 PL_last_lop_op = 0;
11905 PL_in_my = proto_perl->Iin_my;
11906 PL_in_my_stash = hv_dup(proto_perl->Iin_my_stash, param);
11908 PL_cryptseen = proto_perl->Icryptseen;
11911 PL_hints = proto_perl->Ihints;
11913 PL_amagic_generation = proto_perl->Iamagic_generation;
11915 #ifdef USE_LOCALE_COLLATE
11916 PL_collation_ix = proto_perl->Icollation_ix;
11917 PL_collation_name = SAVEPV(proto_perl->Icollation_name);
11918 PL_collation_standard = proto_perl->Icollation_standard;
11919 PL_collxfrm_base = proto_perl->Icollxfrm_base;
11920 PL_collxfrm_mult = proto_perl->Icollxfrm_mult;
11921 #endif /* USE_LOCALE_COLLATE */
11923 #ifdef USE_LOCALE_NUMERIC
11924 PL_numeric_name = SAVEPV(proto_perl->Inumeric_name);
11925 PL_numeric_standard = proto_perl->Inumeric_standard;
11926 PL_numeric_local = proto_perl->Inumeric_local;
11927 PL_numeric_radix_sv = sv_dup_inc(proto_perl->Inumeric_radix_sv, param);
11928 #endif /* !USE_LOCALE_NUMERIC */
11930 /* utf8 character classes */
11931 PL_utf8_alnum = sv_dup_inc(proto_perl->Iutf8_alnum, param);
11932 PL_utf8_alnumc = sv_dup_inc(proto_perl->Iutf8_alnumc, param);
11933 PL_utf8_ascii = sv_dup_inc(proto_perl->Iutf8_ascii, param);
11934 PL_utf8_alpha = sv_dup_inc(proto_perl->Iutf8_alpha, param);
11935 PL_utf8_space = sv_dup_inc(proto_perl->Iutf8_space, param);
11936 PL_utf8_cntrl = sv_dup_inc(proto_perl->Iutf8_cntrl, param);
11937 PL_utf8_graph = sv_dup_inc(proto_perl->Iutf8_graph, param);
11938 PL_utf8_digit = sv_dup_inc(proto_perl->Iutf8_digit, param);
11939 PL_utf8_upper = sv_dup_inc(proto_perl->Iutf8_upper, param);
11940 PL_utf8_lower = sv_dup_inc(proto_perl->Iutf8_lower, param);
11941 PL_utf8_print = sv_dup_inc(proto_perl->Iutf8_print, param);
11942 PL_utf8_punct = sv_dup_inc(proto_perl->Iutf8_punct, param);
11943 PL_utf8_xdigit = sv_dup_inc(proto_perl->Iutf8_xdigit, param);
11944 PL_utf8_mark = sv_dup_inc(proto_perl->Iutf8_mark, param);
11945 PL_utf8_toupper = sv_dup_inc(proto_perl->Iutf8_toupper, param);
11946 PL_utf8_totitle = sv_dup_inc(proto_perl->Iutf8_totitle, param);
11947 PL_utf8_tolower = sv_dup_inc(proto_perl->Iutf8_tolower, param);
11948 PL_utf8_tofold = sv_dup_inc(proto_perl->Iutf8_tofold, param);
11949 PL_utf8_idstart = sv_dup_inc(proto_perl->Iutf8_idstart, param);
11950 PL_utf8_idcont = sv_dup_inc(proto_perl->Iutf8_idcont, param);
11952 /* Did the locale setup indicate UTF-8? */
11953 PL_utf8locale = proto_perl->Iutf8locale;
11954 /* Unicode features (see perlrun/-C) */
11955 PL_unicode = proto_perl->Iunicode;
11957 /* Pre-5.8 signals control */
11958 PL_signals = proto_perl->Isignals;
11960 /* times() ticks per second */
11961 PL_clocktick = proto_perl->Iclocktick;
11963 /* Recursion stopper for PerlIO_find_layer */
11964 PL_in_load_module = proto_perl->Iin_load_module;
11966 /* sort() routine */
11967 PL_sort_RealCmp = proto_perl->Isort_RealCmp;
11969 /* Not really needed/useful since the reenrant_retint is "volatile",
11970 * but do it for consistency's sake. */
11971 PL_reentrant_retint = proto_perl->Ireentrant_retint;
11973 /* Hooks to shared SVs and locks. */
11974 PL_sharehook = proto_perl->Isharehook;
11975 PL_lockhook = proto_perl->Ilockhook;
11976 PL_unlockhook = proto_perl->Iunlockhook;
11977 PL_threadhook = proto_perl->Ithreadhook;
11979 PL_runops_std = proto_perl->Irunops_std;
11980 PL_runops_dbg = proto_perl->Irunops_dbg;
11982 #ifdef THREADS_HAVE_PIDS
11983 PL_ppid = proto_perl->Ippid;
11987 PL_last_swash_hv = Nullhv; /* reinits on demand */
11988 PL_last_swash_klen = 0;
11989 PL_last_swash_key[0]= '\0';
11990 PL_last_swash_tmps = (U8*)NULL;
11991 PL_last_swash_slen = 0;
11993 PL_glob_index = proto_perl->Iglob_index;
11994 PL_srand_called = proto_perl->Isrand_called;
11995 PL_hash_seed = proto_perl->Ihash_seed;
11996 PL_rehash_seed = proto_perl->Irehash_seed;
11997 PL_uudmap['M'] = 0; /* reinits on demand */
11998 PL_bitcount = Nullch; /* reinits on demand */
12000 if (proto_perl->Ipsig_pend) {
12001 Newz(0, PL_psig_pend, SIG_SIZE, int);
12004 PL_psig_pend = (int*)NULL;
12007 if (proto_perl->Ipsig_ptr) {
12008 Newz(0, PL_psig_ptr, SIG_SIZE, SV*);
12009 Newz(0, PL_psig_name, SIG_SIZE, SV*);
12010 for (i = 1; i < SIG_SIZE; i++) {
12011 PL_psig_ptr[i] = sv_dup_inc(proto_perl->Ipsig_ptr[i], param);
12012 PL_psig_name[i] = sv_dup_inc(proto_perl->Ipsig_name[i], param);
12016 PL_psig_ptr = (SV**)NULL;
12017 PL_psig_name = (SV**)NULL;
12020 /* thrdvar.h stuff */
12022 if (flags & CLONEf_COPY_STACKS) {
12023 /* next allocation will be PL_tmps_stack[PL_tmps_ix+1] */
12024 PL_tmps_ix = proto_perl->Ttmps_ix;
12025 PL_tmps_max = proto_perl->Ttmps_max;
12026 PL_tmps_floor = proto_perl->Ttmps_floor;
12027 Newz(50, PL_tmps_stack, PL_tmps_max, SV*);
12029 while (i <= PL_tmps_ix) {
12030 PL_tmps_stack[i] = sv_dup_inc(proto_perl->Ttmps_stack[i], param);
12034 /* next PUSHMARK() sets *(PL_markstack_ptr+1) */
12035 i = proto_perl->Tmarkstack_max - proto_perl->Tmarkstack;
12036 Newz(54, PL_markstack, i, I32);
12037 PL_markstack_max = PL_markstack + (proto_perl->Tmarkstack_max
12038 - proto_perl->Tmarkstack);
12039 PL_markstack_ptr = PL_markstack + (proto_perl->Tmarkstack_ptr
12040 - proto_perl->Tmarkstack);
12041 Copy(proto_perl->Tmarkstack, PL_markstack,
12042 PL_markstack_ptr - PL_markstack + 1, I32);
12044 /* next push_scope()/ENTER sets PL_scopestack[PL_scopestack_ix]
12045 * NOTE: unlike the others! */
12046 PL_scopestack_ix = proto_perl->Tscopestack_ix;
12047 PL_scopestack_max = proto_perl->Tscopestack_max;
12048 Newz(54, PL_scopestack, PL_scopestack_max, I32);
12049 Copy(proto_perl->Tscopestack, PL_scopestack, PL_scopestack_ix, I32);
12051 /* NOTE: si_dup() looks at PL_markstack */
12052 PL_curstackinfo = si_dup(proto_perl->Tcurstackinfo, param);
12054 /* PL_curstack = PL_curstackinfo->si_stack; */
12055 PL_curstack = av_dup(proto_perl->Tcurstack, param);
12056 PL_mainstack = av_dup(proto_perl->Tmainstack, param);
12058 /* next PUSHs() etc. set *(PL_stack_sp+1) */
12059 PL_stack_base = AvARRAY(PL_curstack);
12060 PL_stack_sp = PL_stack_base + (proto_perl->Tstack_sp
12061 - proto_perl->Tstack_base);
12062 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
12064 /* next SSPUSHFOO() sets PL_savestack[PL_savestack_ix]
12065 * NOTE: unlike the others! */
12066 PL_savestack_ix = proto_perl->Tsavestack_ix;
12067 PL_savestack_max = proto_perl->Tsavestack_max;
12068 /*Newz(54, PL_savestack, PL_savestack_max, ANY);*/
12069 PL_savestack = ss_dup(proto_perl, param);
12073 ENTER; /* perl_destruct() wants to LEAVE; */
12076 PL_start_env = proto_perl->Tstart_env; /* XXXXXX */
12077 PL_top_env = &PL_start_env;
12079 PL_op = proto_perl->Top;
12082 PL_Xpv = (XPV*)NULL;
12083 PL_na = proto_perl->Tna;
12085 PL_statbuf = proto_perl->Tstatbuf;
12086 PL_statcache = proto_perl->Tstatcache;
12087 PL_statgv = gv_dup(proto_perl->Tstatgv, param);
12088 PL_statname = sv_dup_inc(proto_perl->Tstatname, param);
12090 PL_timesbuf = proto_perl->Ttimesbuf;
12093 PL_tainted = proto_perl->Ttainted;
12094 PL_curpm = proto_perl->Tcurpm; /* XXX No PMOP ref count */
12095 PL_rs = sv_dup_inc(proto_perl->Trs, param);
12096 PL_last_in_gv = gv_dup(proto_perl->Tlast_in_gv, param);
12097 PL_ofs_sv = sv_dup_inc(proto_perl->Tofs_sv, param);
12098 PL_defoutgv = gv_dup_inc(proto_perl->Tdefoutgv, param);
12099 PL_chopset = proto_perl->Tchopset; /* XXX never deallocated */
12100 PL_toptarget = sv_dup_inc(proto_perl->Ttoptarget, param);
12101 PL_bodytarget = sv_dup_inc(proto_perl->Tbodytarget, param);
12102 PL_formtarget = sv_dup(proto_perl->Tformtarget, param);
12104 PL_restartop = proto_perl->Trestartop;
12105 PL_in_eval = proto_perl->Tin_eval;
12106 PL_delaymagic = proto_perl->Tdelaymagic;
12107 PL_dirty = proto_perl->Tdirty;
12108 PL_localizing = proto_perl->Tlocalizing;
12110 #ifdef PERL_FLEXIBLE_EXCEPTIONS
12111 PL_protect = proto_perl->Tprotect;
12113 PL_errors = sv_dup_inc(proto_perl->Terrors, param);
12114 PL_hv_fetch_ent_mh = Nullhe;
12115 PL_modcount = proto_perl->Tmodcount;
12116 PL_lastgotoprobe = Nullop;
12117 PL_dumpindent = proto_perl->Tdumpindent;
12119 PL_sortcop = (OP*)any_dup(proto_perl->Tsortcop, proto_perl);
12120 PL_sortstash = hv_dup(proto_perl->Tsortstash, param);
12121 PL_firstgv = gv_dup(proto_perl->Tfirstgv, param);
12122 PL_secondgv = gv_dup(proto_perl->Tsecondgv, param);
12123 PL_sortcxix = proto_perl->Tsortcxix;
12124 PL_efloatbuf = Nullch; /* reinits on demand */
12125 PL_efloatsize = 0; /* reinits on demand */
12129 PL_screamfirst = NULL;
12130 PL_screamnext = NULL;
12131 PL_maxscream = -1; /* reinits on demand */
12132 PL_lastscream = Nullsv;
12134 PL_watchaddr = NULL;
12135 PL_watchok = Nullch;
12137 PL_regdummy = proto_perl->Tregdummy;
12138 PL_regprecomp = Nullch;
12141 PL_colorset = 0; /* reinits PL_colors[] */
12142 /*PL_colors[6] = {0,0,0,0,0,0};*/
12143 PL_reginput = Nullch;
12144 PL_regbol = Nullch;
12145 PL_regeol = Nullch;
12146 PL_regstartp = (I32*)NULL;
12147 PL_regendp = (I32*)NULL;
12148 PL_reglastparen = (U32*)NULL;
12149 PL_reglastcloseparen = (U32*)NULL;
12150 PL_regtill = Nullch;
12151 PL_reg_start_tmp = (char**)NULL;
12152 PL_reg_start_tmpl = 0;
12153 PL_regdata = (struct reg_data*)NULL;
12156 PL_reg_eval_set = 0;
12158 PL_regprogram = (regnode*)NULL;
12160 PL_regcc = (CURCUR*)NULL;
12161 PL_reg_call_cc = (struct re_cc_state*)NULL;
12162 PL_reg_re = (regexp*)NULL;
12163 PL_reg_ganch = Nullch;
12164 PL_reg_sv = Nullsv;
12165 PL_reg_match_utf8 = FALSE;
12166 PL_reg_magic = (MAGIC*)NULL;
12168 PL_reg_oldcurpm = (PMOP*)NULL;
12169 PL_reg_curpm = (PMOP*)NULL;
12170 PL_reg_oldsaved = Nullch;
12171 PL_reg_oldsavedlen = 0;
12172 #ifdef PERL_COPY_ON_WRITE
12175 PL_reg_maxiter = 0;
12176 PL_reg_leftiter = 0;
12177 PL_reg_poscache = Nullch;
12178 PL_reg_poscache_size= 0;
12180 /* RE engine - function pointers */
12181 PL_regcompp = proto_perl->Tregcompp;
12182 PL_regexecp = proto_perl->Tregexecp;
12183 PL_regint_start = proto_perl->Tregint_start;
12184 PL_regint_string = proto_perl->Tregint_string;
12185 PL_regfree = proto_perl->Tregfree;
12187 PL_reginterp_cnt = 0;
12188 PL_reg_starttry = 0;
12190 /* Pluggable optimizer */
12191 PL_peepp = proto_perl->Tpeepp;
12193 PL_stashcache = newHV();
12195 if (!(flags & CLONEf_KEEP_PTR_TABLE)) {
12196 ptr_table_free(PL_ptr_table);
12197 PL_ptr_table = NULL;
12200 /* Call the ->CLONE method, if it exists, for each of the stashes
12201 identified by sv_dup() above.
12203 while(av_len(param->stashes) != -1) {
12204 HV* stash = (HV*) av_shift(param->stashes);
12205 GV* cloner = gv_fetchmethod_autoload(stash, "CLONE", 0);
12206 if (cloner && GvCV(cloner)) {
12211 XPUSHs(sv_2mortal(newSVpv(HvNAME(stash), 0)));
12213 call_sv((SV*)GvCV(cloner), G_DISCARD);
12219 SvREFCNT_dec(param->stashes);
12224 #endif /* USE_ITHREADS */
12227 =head1 Unicode Support
12229 =for apidoc sv_recode_to_utf8
12231 The encoding is assumed to be an Encode object, on entry the PV
12232 of the sv is assumed to be octets in that encoding, and the sv
12233 will be converted into Unicode (and UTF-8).
12235 If the sv already is UTF-8 (or if it is not POK), or if the encoding
12236 is not a reference, nothing is done to the sv. If the encoding is not
12237 an C<Encode::XS> Encoding object, bad things will happen.
12238 (See F<lib/encoding.pm> and L<Encode>).
12240 The PV of the sv is returned.
12245 Perl_sv_recode_to_utf8(pTHX_ SV *sv, SV *encoding)
12247 if (SvPOK(sv) && !SvUTF8(sv) && !IN_BYTES && SvROK(encoding)) {
12261 Passing sv_yes is wrong - it needs to be or'ed set of constants
12262 for Encode::XS, while UTf-8 decode (currently) assumes a true value means
12263 remove converted chars from source.
12265 Both will default the value - let them.
12267 XPUSHs(&PL_sv_yes);
12270 call_method("decode", G_SCALAR);
12274 s = SvPV(uni, len);
12275 if (s != SvPVX(sv)) {
12276 SvGROW(sv, len + 1);
12277 Move(s, SvPVX(sv), len, char);
12278 SvCUR_set(sv, len);
12279 SvPVX(sv)[len] = 0;
12289 =for apidoc sv_cat_decode
12291 The encoding is assumed to be an Encode object, the PV of the ssv is
12292 assumed to be octets in that encoding and decoding the input starts
12293 from the position which (PV + *offset) pointed to. The dsv will be
12294 concatenated the decoded UTF-8 string from ssv. Decoding will terminate
12295 when the string tstr appears in decoding output or the input ends on
12296 the PV of the ssv. The value which the offset points will be modified
12297 to the last input position on the ssv.
12299 Returns TRUE if the terminator was found, else returns FALSE.
12304 Perl_sv_cat_decode(pTHX_ SV *dsv, SV *encoding,
12305 SV *ssv, int *offset, char *tstr, int tlen)
12308 if (SvPOK(ssv) && SvPOK(dsv) && SvROK(encoding) && offset) {
12319 XPUSHs(offsv = sv_2mortal(newSViv(*offset)));
12320 XPUSHs(sv_2mortal(newSVpvn(tstr, tlen)));
12322 call_method("cat_decode", G_SCALAR);
12324 ret = SvTRUE(TOPs);
12325 *offset = SvIV(offsv);
12331 Perl_croak(aTHX_ "Invalid argument to sv_cat_decode");