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)
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);
3752 =for apidoc sv_copypv
3754 Copies a stringified representation of the source SV into the
3755 destination SV. Automatically performs any necessary mg_get and
3756 coercion of numeric values into strings. Guaranteed to preserve
3757 UTF-8 flag even from overloaded objects. Similar in nature to
3758 sv_2pv[_flags] but operates directly on an SV instead of just the
3759 string. Mostly uses sv_2pv_flags to do its work, except when that
3760 would lose the UTF-8'ness of the PV.
3766 Perl_sv_copypv(pTHX_ SV *dsv, register SV *ssv)
3771 sv_setpvn(dsv,s,len);
3779 =for apidoc sv_2pvbyte_nolen
3781 Return a pointer to the byte-encoded representation of the SV.
3782 May cause the SV to be downgraded from UTF-8 as a side-effect.
3784 Usually accessed via the C<SvPVbyte_nolen> macro.
3790 Perl_sv_2pvbyte_nolen(pTHX_ register SV *sv)
3793 return sv_2pvbyte(sv, &n_a);
3797 =for apidoc sv_2pvbyte
3799 Return a pointer to the byte-encoded representation of the SV, and set *lp
3800 to its length. May cause the SV to be downgraded from UTF-8 as a
3803 Usually accessed via the C<SvPVbyte> macro.
3809 Perl_sv_2pvbyte(pTHX_ register SV *sv, STRLEN *lp)
3811 sv_utf8_downgrade(sv,0);
3812 return SvPV(sv,*lp);
3816 =for apidoc sv_2pvutf8_nolen
3818 Return a pointer to the UTF-8-encoded representation of the SV.
3819 May cause the SV to be upgraded to UTF-8 as a side-effect.
3821 Usually accessed via the C<SvPVutf8_nolen> macro.
3827 Perl_sv_2pvutf8_nolen(pTHX_ register SV *sv)
3830 return sv_2pvutf8(sv, &n_a);
3834 =for apidoc sv_2pvutf8
3836 Return a pointer to the UTF-8-encoded representation of the SV, and set *lp
3837 to its length. May cause the SV to be upgraded to UTF-8 as a side-effect.
3839 Usually accessed via the C<SvPVutf8> macro.
3845 Perl_sv_2pvutf8(pTHX_ register SV *sv, STRLEN *lp)
3847 sv_utf8_upgrade(sv);
3848 return SvPV(sv,*lp);
3852 =for apidoc sv_2bool
3854 This function is only called on magical items, and is only used by
3855 sv_true() or its macro equivalent.
3861 Perl_sv_2bool(pTHX_ register SV *sv)
3870 if (SvAMAGIC(sv) && (tmpsv=AMG_CALLun(sv,bool_)) &&
3871 (!SvROK(tmpsv) || (SvRV(tmpsv) != SvRV(sv))))
3872 return (bool)SvTRUE(tmpsv);
3873 return SvRV(sv) != 0;
3876 register XPV* Xpvtmp;
3877 if ((Xpvtmp = (XPV*)SvANY(sv)) &&
3878 (*Xpvtmp->xpv_pv > '0' ||
3879 Xpvtmp->xpv_cur > 1 ||
3880 (Xpvtmp->xpv_cur && *Xpvtmp->xpv_pv != '0')))
3887 return SvIVX(sv) != 0;
3890 return SvNVX(sv) != 0.0;
3897 /* sv_utf8_upgrade() is now a macro using sv_utf8_upgrade_flags();
3898 * this function provided for binary compatibility only
3903 Perl_sv_utf8_upgrade(pTHX_ register SV *sv)
3905 return sv_utf8_upgrade_flags(sv, SV_GMAGIC);
3909 =for apidoc sv_utf8_upgrade
3911 Converts the PV of an SV to its UTF-8-encoded form.
3912 Forces the SV to string form if it is not already.
3913 Always sets the SvUTF8 flag to avoid future validity checks even
3914 if all the bytes have hibit clear.
3916 This is not as a general purpose byte encoding to Unicode interface:
3917 use the Encode extension for that.
3919 =for apidoc sv_utf8_upgrade_flags
3921 Converts the PV of an SV to its UTF-8-encoded form.
3922 Forces the SV to string form if it is not already.
3923 Always sets the SvUTF8 flag to avoid future validity checks even
3924 if all the bytes have hibit clear. If C<flags> has C<SV_GMAGIC> bit set,
3925 will C<mg_get> on C<sv> if appropriate, else not. C<sv_utf8_upgrade> and
3926 C<sv_utf8_upgrade_nomg> are implemented in terms of this function.
3928 This is not as a general purpose byte encoding to Unicode interface:
3929 use the Encode extension for that.
3935 Perl_sv_utf8_upgrade_flags(pTHX_ register SV *sv, I32 flags)
3942 (void) SvPV_force(sv,len);
3951 sv_force_normal_flags(sv, 0);
3954 if (PL_encoding && !(flags & SV_UTF8_NO_ENCODING))
3955 sv_recode_to_utf8(sv, PL_encoding);
3956 else { /* Assume Latin-1/EBCDIC */
3957 /* This function could be much more efficient if we
3958 * had a FLAG in SVs to signal if there are any hibit
3959 * chars in the PV. Given that there isn't such a flag
3960 * make the loop as fast as possible. */
3961 s = (U8 *) SvPVX(sv);
3962 e = (U8 *) SvEND(sv);
3966 if ((hibit = !NATIVE_IS_INVARIANT(ch)))
3971 (void)SvOOK_off(sv);
3973 len = SvCUR(sv) + 1; /* Plus the \0 */
3974 SvPVX(sv) = (char*)bytes_to_utf8((U8*)s, &len);
3975 SvCUR(sv) = len - 1;
3977 Safefree(s); /* No longer using what was there before. */
3978 SvLEN(sv) = len; /* No longer know the real size. */
3980 /* Mark as UTF-8 even if no hibit - saves scanning loop */
3988 =for apidoc sv_utf8_downgrade
3990 Attempts to convert the PV of an SV from characters to bytes.
3991 If the PV contains a character beyond byte, this conversion will fail;
3992 in this case, either returns false or, if C<fail_ok> is not
3995 This is not as a general purpose Unicode to byte encoding interface:
3996 use the Encode extension for that.
4002 Perl_sv_utf8_downgrade(pTHX_ register SV* sv, bool fail_ok)
4004 if (SvPOKp(sv) && SvUTF8(sv)) {
4010 sv_force_normal_flags(sv, 0);
4012 s = (U8 *) SvPV(sv, len);
4013 if (!utf8_to_bytes(s, &len)) {
4018 Perl_croak(aTHX_ "Wide character in %s",
4021 Perl_croak(aTHX_ "Wide character");
4032 =for apidoc sv_utf8_encode
4034 Converts the PV of an SV to UTF-8, but then turns the C<SvUTF8>
4035 flag off so that it looks like octets again.
4041 Perl_sv_utf8_encode(pTHX_ register SV *sv)
4043 (void) sv_utf8_upgrade(sv);
4045 sv_force_normal_flags(sv, 0);
4047 if (SvREADONLY(sv)) {
4048 Perl_croak(aTHX_ PL_no_modify);
4054 =for apidoc sv_utf8_decode
4056 If the PV of the SV is an octet sequence in UTF-8
4057 and contains a multiple-byte character, the C<SvUTF8> flag is turned on
4058 so that it looks like a character. If the PV contains only single-byte
4059 characters, the C<SvUTF8> flag stays being off.
4060 Scans PV for validity and returns false if the PV is invalid UTF-8.
4066 Perl_sv_utf8_decode(pTHX_ register SV *sv)
4072 /* The octets may have got themselves encoded - get them back as
4075 if (!sv_utf8_downgrade(sv, TRUE))
4078 /* it is actually just a matter of turning the utf8 flag on, but
4079 * we want to make sure everything inside is valid utf8 first.
4081 c = (U8 *) SvPVX(sv);
4082 if (!is_utf8_string(c, SvCUR(sv)+1))
4084 e = (U8 *) SvEND(sv);
4087 if (!UTF8_IS_INVARIANT(ch)) {
4096 /* sv_setsv() is now a macro using Perl_sv_setsv_flags();
4097 * this function provided for binary compatibility only
4101 Perl_sv_setsv(pTHX_ SV *dstr, register SV *sstr)
4103 sv_setsv_flags(dstr, sstr, SV_GMAGIC);
4107 =for apidoc sv_setsv
4109 Copies the contents of the source SV C<ssv> into the destination SV
4110 C<dsv>. The source SV may be destroyed if it is mortal, so don't use this
4111 function if the source SV needs to be reused. Does not handle 'set' magic.
4112 Loosely speaking, it performs a copy-by-value, obliterating any previous
4113 content of the destination.
4115 You probably want to use one of the assortment of wrappers, such as
4116 C<SvSetSV>, C<SvSetSV_nosteal>, C<SvSetMagicSV> and
4117 C<SvSetMagicSV_nosteal>.
4119 =for apidoc sv_setsv_flags
4121 Copies the contents of the source SV C<ssv> into the destination SV
4122 C<dsv>. The source SV may be destroyed if it is mortal, so don't use this
4123 function if the source SV needs to be reused. Does not handle 'set' magic.
4124 Loosely speaking, it performs a copy-by-value, obliterating any previous
4125 content of the destination.
4126 If the C<flags> parameter has the C<SV_GMAGIC> bit set, will C<mg_get> on
4127 C<ssv> if appropriate, else not. C<sv_setsv> and C<sv_setsv_nomg> are
4128 implemented in terms of this function.
4130 You probably want to use one of the assortment of wrappers, such as
4131 C<SvSetSV>, C<SvSetSV_nosteal>, C<SvSetMagicSV> and
4132 C<SvSetMagicSV_nosteal>.
4134 This is the primary function for copying scalars, and most other
4135 copy-ish functions and macros use this underneath.
4141 Perl_sv_setsv_flags(pTHX_ SV *dstr, register SV *sstr, I32 flags)
4143 register U32 sflags;
4149 SV_CHECK_THINKFIRST_COW_DROP(dstr);
4151 sstr = &PL_sv_undef;
4152 stype = SvTYPE(sstr);
4153 dtype = SvTYPE(dstr);
4158 /* need to nuke the magic */
4160 SvRMAGICAL_off(dstr);
4163 /* There's a lot of redundancy below but we're going for speed here */
4168 if (dtype != SVt_PVGV) {
4169 (void)SvOK_off(dstr);
4177 sv_upgrade(dstr, SVt_IV);
4180 sv_upgrade(dstr, SVt_PVNV);
4184 sv_upgrade(dstr, SVt_PVIV);
4187 (void)SvIOK_only(dstr);
4188 SvIVX(dstr) = SvIVX(sstr);
4191 if (SvTAINTED(sstr))
4202 sv_upgrade(dstr, SVt_NV);
4207 sv_upgrade(dstr, SVt_PVNV);
4210 SvNVX(dstr) = SvNVX(sstr);
4211 (void)SvNOK_only(dstr);
4212 if (SvTAINTED(sstr))
4220 sv_upgrade(dstr, SVt_RV);
4221 else if (dtype == SVt_PVGV &&
4222 SvROK(sstr) && SvTYPE(SvRV(sstr)) == SVt_PVGV) {
4225 if (GvIMPORTED(dstr) != GVf_IMPORTED
4226 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
4228 GvIMPORTED_on(dstr);
4237 #ifdef PERL_COPY_ON_WRITE
4238 if ((SvFLAGS(sstr) & CAN_COW_MASK) == CAN_COW_FLAGS) {
4239 if (dtype < SVt_PVIV)
4240 sv_upgrade(dstr, SVt_PVIV);
4247 sv_upgrade(dstr, SVt_PV);
4250 if (dtype < SVt_PVIV)
4251 sv_upgrade(dstr, SVt_PVIV);
4254 if (dtype < SVt_PVNV)
4255 sv_upgrade(dstr, SVt_PVNV);
4262 Perl_croak(aTHX_ "Bizarre copy of %s in %s", sv_reftype(sstr, 0),
4265 Perl_croak(aTHX_ "Bizarre copy of %s", sv_reftype(sstr, 0));
4269 if (dtype <= SVt_PVGV) {
4271 if (dtype != SVt_PVGV) {
4272 char *name = GvNAME(sstr);
4273 STRLEN len = GvNAMELEN(sstr);
4274 /* don't upgrade SVt_PVLV: it can hold a glob */
4275 if (dtype != SVt_PVLV)
4276 sv_upgrade(dstr, SVt_PVGV);
4277 sv_magic(dstr, dstr, PERL_MAGIC_glob, Nullch, 0);
4278 GvSTASH(dstr) = (HV*)SvREFCNT_inc(GvSTASH(sstr));
4279 GvNAME(dstr) = savepvn(name, len);
4280 GvNAMELEN(dstr) = len;
4281 SvFAKE_on(dstr); /* can coerce to non-glob */
4283 /* ahem, death to those who redefine active sort subs */
4284 else if (PL_curstackinfo->si_type == PERLSI_SORT
4285 && GvCV(dstr) && PL_sortcop == CvSTART(GvCV(dstr)))
4286 Perl_croak(aTHX_ "Can't redefine active sort subroutine %s",
4289 #ifdef GV_UNIQUE_CHECK
4290 if (GvUNIQUE((GV*)dstr)) {
4291 Perl_croak(aTHX_ PL_no_modify);
4295 (void)SvOK_off(dstr);
4296 GvINTRO_off(dstr); /* one-shot flag */
4298 GvGP(dstr) = gp_ref(GvGP(sstr));
4299 if (SvTAINTED(sstr))
4301 if (GvIMPORTED(dstr) != GVf_IMPORTED
4302 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
4304 GvIMPORTED_on(dstr);
4312 if (SvGMAGICAL(sstr) && (flags & SV_GMAGIC)) {
4314 if ((int)SvTYPE(sstr) != stype) {
4315 stype = SvTYPE(sstr);
4316 if (stype == SVt_PVGV && dtype <= SVt_PVGV)
4320 if (stype == SVt_PVLV)
4321 (void)SvUPGRADE(dstr, SVt_PVNV);
4323 (void)SvUPGRADE(dstr, (U32)stype);
4326 sflags = SvFLAGS(sstr);
4328 if (sflags & SVf_ROK) {
4329 if (dtype >= SVt_PV) {
4330 if (dtype == SVt_PVGV) {
4331 SV *sref = SvREFCNT_inc(SvRV(sstr));
4333 int intro = GvINTRO(dstr);
4335 #ifdef GV_UNIQUE_CHECK
4336 if (GvUNIQUE((GV*)dstr)) {
4337 Perl_croak(aTHX_ PL_no_modify);
4342 GvINTRO_off(dstr); /* one-shot flag */
4343 GvLINE(dstr) = CopLINE(PL_curcop);
4344 GvEGV(dstr) = (GV*)dstr;
4347 switch (SvTYPE(sref)) {
4350 SAVEGENERICSV(GvAV(dstr));
4352 dref = (SV*)GvAV(dstr);
4353 GvAV(dstr) = (AV*)sref;
4354 if (!GvIMPORTED_AV(dstr)
4355 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
4357 GvIMPORTED_AV_on(dstr);
4362 SAVEGENERICSV(GvHV(dstr));
4364 dref = (SV*)GvHV(dstr);
4365 GvHV(dstr) = (HV*)sref;
4366 if (!GvIMPORTED_HV(dstr)
4367 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
4369 GvIMPORTED_HV_on(dstr);
4374 if (GvCVGEN(dstr) && GvCV(dstr) != (CV*)sref) {
4375 SvREFCNT_dec(GvCV(dstr));
4376 GvCV(dstr) = Nullcv;
4377 GvCVGEN(dstr) = 0; /* Switch off cacheness. */
4378 PL_sub_generation++;
4380 SAVEGENERICSV(GvCV(dstr));
4383 dref = (SV*)GvCV(dstr);
4384 if (GvCV(dstr) != (CV*)sref) {
4385 CV* cv = GvCV(dstr);
4387 if (!GvCVGEN((GV*)dstr) &&
4388 (CvROOT(cv) || CvXSUB(cv)))
4390 /* ahem, death to those who redefine
4391 * active sort subs */
4392 if (PL_curstackinfo->si_type == PERLSI_SORT &&
4393 PL_sortcop == CvSTART(cv))
4395 "Can't redefine active sort subroutine %s",
4396 GvENAME((GV*)dstr));
4397 /* Redefining a sub - warning is mandatory if
4398 it was a const and its value changed. */
4399 if (ckWARN(WARN_REDEFINE)
4401 && (!CvCONST((CV*)sref)
4402 || sv_cmp(cv_const_sv(cv),
4403 cv_const_sv((CV*)sref)))))
4405 Perl_warner(aTHX_ packWARN(WARN_REDEFINE),
4407 ? "Constant subroutine %s::%s redefined"
4408 : "Subroutine %s::%s redefined",
4409 HvNAME(GvSTASH((GV*)dstr)),
4410 GvENAME((GV*)dstr));
4414 cv_ckproto(cv, (GV*)dstr,
4415 SvPOK(sref) ? SvPVX(sref) : Nullch);
4417 GvCV(dstr) = (CV*)sref;
4418 GvCVGEN(dstr) = 0; /* Switch off cacheness. */
4419 GvASSUMECV_on(dstr);
4420 PL_sub_generation++;
4422 if (!GvIMPORTED_CV(dstr)
4423 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
4425 GvIMPORTED_CV_on(dstr);
4430 SAVEGENERICSV(GvIOp(dstr));
4432 dref = (SV*)GvIOp(dstr);
4433 GvIOp(dstr) = (IO*)sref;
4437 SAVEGENERICSV(GvFORM(dstr));
4439 dref = (SV*)GvFORM(dstr);
4440 GvFORM(dstr) = (CV*)sref;
4444 SAVEGENERICSV(GvSV(dstr));
4446 dref = (SV*)GvSV(dstr);
4448 if (!GvIMPORTED_SV(dstr)
4449 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
4451 GvIMPORTED_SV_on(dstr);
4457 if (SvTAINTED(sstr))
4462 (void)SvOOK_off(dstr); /* backoff */
4464 Safefree(SvPVX(dstr));
4465 SvLEN(dstr)=SvCUR(dstr)=0;
4468 (void)SvOK_off(dstr);
4469 SvRV(dstr) = SvREFCNT_inc(SvRV(sstr));
4471 if (sflags & SVp_NOK) {
4473 /* Only set the public OK flag if the source has public OK. */
4474 if (sflags & SVf_NOK)
4475 SvFLAGS(dstr) |= SVf_NOK;
4476 SvNVX(dstr) = SvNVX(sstr);
4478 if (sflags & SVp_IOK) {
4479 (void)SvIOKp_on(dstr);
4480 if (sflags & SVf_IOK)
4481 SvFLAGS(dstr) |= SVf_IOK;
4482 if (sflags & SVf_IVisUV)
4484 SvIVX(dstr) = SvIVX(sstr);
4486 if (SvAMAGIC(sstr)) {
4490 else if (sflags & SVp_POK) {
4494 * Check to see if we can just swipe the string. If so, it's a
4495 * possible small lose on short strings, but a big win on long ones.
4496 * It might even be a win on short strings if SvPVX(dstr)
4497 * has to be allocated and SvPVX(sstr) has to be freed.
4500 /* Whichever path we take through the next code, we want this true,
4501 and doing it now facilitates the COW check. */
4502 (void)SvPOK_only(dstr);
4505 #ifdef PERL_COPY_ON_WRITE
4506 (sflags & (SVf_FAKE | SVf_READONLY)) != (SVf_FAKE | SVf_READONLY)
4510 (sflags & SVs_TEMP) && /* slated for free anyway? */
4511 !(sflags & SVf_OOK) && /* and not involved in OOK hack? */
4512 SvREFCNT(sstr) == 1 && /* and no other references to it? */
4513 SvLEN(sstr) && /* and really is a string */
4514 /* and won't be needed again, potentially */
4515 !(PL_op && PL_op->op_type == OP_AASSIGN))
4516 #ifdef PERL_COPY_ON_WRITE
4517 && !((sflags & CAN_COW_MASK) == CAN_COW_FLAGS
4518 && (SvFLAGS(dstr) & CAN_COW_MASK) == CAN_COW_FLAGS
4519 && SvTYPE(sstr) >= SVt_PVIV)
4522 /* Failed the swipe test, and it's not a shared hash key either.
4523 Have to copy the string. */
4524 STRLEN len = SvCUR(sstr);
4525 SvGROW(dstr, len + 1); /* inlined from sv_setpvn */
4526 Move(SvPVX(sstr),SvPVX(dstr),len,char);
4527 SvCUR_set(dstr, len);
4528 *SvEND(dstr) = '\0';
4530 /* If PERL_COPY_ON_WRITE is not defined, then isSwipe will always
4532 #ifdef PERL_COPY_ON_WRITE
4533 /* Either it's a shared hash key, or it's suitable for
4534 copy-on-write or we can swipe the string. */
4536 PerlIO_printf(Perl_debug_log, "Copy on write: sstr --> dstr\n");
4541 /* I believe I should acquire a global SV mutex if
4542 it's a COW sv (not a shared hash key) to stop
4543 it going un copy-on-write.
4544 If the source SV has gone un copy on write between up there
4545 and down here, then (assert() that) it is of the correct
4546 form to make it copy on write again */
4547 if ((sflags & (SVf_FAKE | SVf_READONLY))
4548 != (SVf_FAKE | SVf_READONLY)) {
4549 SvREADONLY_on(sstr);
4551 /* Make the source SV into a loop of 1.
4552 (about to become 2) */
4553 SV_COW_NEXT_SV_SET(sstr, sstr);
4557 /* Initial code is common. */
4558 if (SvPVX(dstr)) { /* we know that dtype >= SVt_PV */
4560 SvFLAGS(dstr) &= ~SVf_OOK;
4561 Safefree(SvPVX(dstr) - SvIVX(dstr));
4563 else if (SvLEN(dstr))
4564 Safefree(SvPVX(dstr));
4567 #ifdef PERL_COPY_ON_WRITE
4569 /* making another shared SV. */
4570 STRLEN cur = SvCUR(sstr);
4571 STRLEN len = SvLEN(sstr);
4572 assert (SvTYPE(dstr) >= SVt_PVIV);
4574 /* SvIsCOW_normal */
4575 /* splice us in between source and next-after-source. */
4576 SV_COW_NEXT_SV_SET(dstr, SV_COW_NEXT_SV(sstr));
4577 SV_COW_NEXT_SV_SET(sstr, dstr);
4578 SvPV_set(dstr, SvPVX(sstr));
4580 /* SvIsCOW_shared_hash */
4581 UV hash = SvUVX(sstr);
4582 DEBUG_C(PerlIO_printf(Perl_debug_log,
4583 "Copy on write: Sharing hash\n"));
4585 sharepvn(SvPVX(sstr),
4586 (sflags & SVf_UTF8?-cur:cur), hash));
4591 SvREADONLY_on(dstr);
4593 /* Relesase a global SV mutex. */
4597 { /* Passes the swipe test. */
4598 SvPV_set(dstr, SvPVX(sstr));
4599 SvLEN_set(dstr, SvLEN(sstr));
4600 SvCUR_set(dstr, SvCUR(sstr));
4603 (void)SvOK_off(sstr); /* NOTE: nukes most SvFLAGS on sstr */
4604 SvPV_set(sstr, Nullch);
4610 if (sflags & SVf_UTF8)
4613 if (sflags & SVp_NOK) {
4615 if (sflags & SVf_NOK)
4616 SvFLAGS(dstr) |= SVf_NOK;
4617 SvNVX(dstr) = SvNVX(sstr);
4619 if (sflags & SVp_IOK) {
4620 (void)SvIOKp_on(dstr);
4621 if (sflags & SVf_IOK)
4622 SvFLAGS(dstr) |= SVf_IOK;
4623 if (sflags & SVf_IVisUV)
4625 SvIVX(dstr) = SvIVX(sstr);
4628 MAGIC *smg = mg_find(sstr,PERL_MAGIC_vstring);
4629 sv_magic(dstr, NULL, PERL_MAGIC_vstring,
4630 smg->mg_ptr, smg->mg_len);
4631 SvRMAGICAL_on(dstr);
4634 else if (sflags & SVp_IOK) {
4635 if (sflags & SVf_IOK)
4636 (void)SvIOK_only(dstr);
4638 (void)SvOK_off(dstr);
4639 (void)SvIOKp_on(dstr);
4641 /* XXXX Do we want to set IsUV for IV(ROK)? Be extra safe... */
4642 if (sflags & SVf_IVisUV)
4644 SvIVX(dstr) = SvIVX(sstr);
4645 if (sflags & SVp_NOK) {
4646 if (sflags & SVf_NOK)
4647 (void)SvNOK_on(dstr);
4649 (void)SvNOKp_on(dstr);
4650 SvNVX(dstr) = SvNVX(sstr);
4653 else if (sflags & SVp_NOK) {
4654 if (sflags & SVf_NOK)
4655 (void)SvNOK_only(dstr);
4657 (void)SvOK_off(dstr);
4660 SvNVX(dstr) = SvNVX(sstr);
4663 if (dtype == SVt_PVGV) {
4664 if (ckWARN(WARN_MISC))
4665 Perl_warner(aTHX_ packWARN(WARN_MISC), "Undefined value assigned to typeglob");
4668 (void)SvOK_off(dstr);
4670 if (SvTAINTED(sstr))
4675 =for apidoc sv_setsv_mg
4677 Like C<sv_setsv>, but also handles 'set' magic.
4683 Perl_sv_setsv_mg(pTHX_ SV *dstr, register SV *sstr)
4685 sv_setsv(dstr,sstr);
4689 #ifdef PERL_COPY_ON_WRITE
4691 Perl_sv_setsv_cow(pTHX_ SV *dstr, SV *sstr)
4693 STRLEN cur = SvCUR(sstr);
4694 STRLEN len = SvLEN(sstr);
4695 register char *new_pv;
4698 PerlIO_printf(Perl_debug_log, "Fast copy on write: %p -> %p\n",
4706 if (SvTHINKFIRST(dstr))
4707 sv_force_normal_flags(dstr, SV_COW_DROP_PV);
4708 else if (SvPVX(dstr))
4709 Safefree(SvPVX(dstr));
4713 (void)SvUPGRADE (dstr, SVt_PVIV);
4715 assert (SvPOK(sstr));
4716 assert (SvPOKp(sstr));
4717 assert (!SvIOK(sstr));
4718 assert (!SvIOKp(sstr));
4719 assert (!SvNOK(sstr));
4720 assert (!SvNOKp(sstr));
4722 if (SvIsCOW(sstr)) {
4724 if (SvLEN(sstr) == 0) {
4725 /* source is a COW shared hash key. */
4726 UV hash = SvUVX(sstr);
4727 DEBUG_C(PerlIO_printf(Perl_debug_log,
4728 "Fast copy on write: Sharing hash\n"));
4730 new_pv = sharepvn(SvPVX(sstr), (SvUTF8(sstr)?-cur:cur), hash);
4733 SV_COW_NEXT_SV_SET(dstr, SV_COW_NEXT_SV(sstr));
4735 assert ((SvFLAGS(sstr) & CAN_COW_MASK) == CAN_COW_FLAGS);
4736 (void)SvUPGRADE (sstr, SVt_PVIV);
4737 SvREADONLY_on(sstr);
4739 DEBUG_C(PerlIO_printf(Perl_debug_log,
4740 "Fast copy on write: Converting sstr to COW\n"));
4741 SV_COW_NEXT_SV_SET(dstr, sstr);
4743 SV_COW_NEXT_SV_SET(sstr, dstr);
4744 new_pv = SvPVX(sstr);
4747 SvPV_set(dstr, new_pv);
4748 SvFLAGS(dstr) = (SVt_PVIV|SVf_POK|SVp_POK|SVf_FAKE|SVf_READONLY);
4761 =for apidoc sv_setpvn
4763 Copies a string into an SV. The C<len> parameter indicates the number of
4764 bytes to be copied. If the C<ptr> argument is NULL the SV will become
4765 undefined. Does not handle 'set' magic. See C<sv_setpvn_mg>.
4771 Perl_sv_setpvn(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
4773 register char *dptr;
4775 SV_CHECK_THINKFIRST_COW_DROP(sv);
4781 /* len is STRLEN which is unsigned, need to copy to signed */
4784 Perl_croak(aTHX_ "panic: sv_setpvn called with negative strlen");
4786 (void)SvUPGRADE(sv, SVt_PV);
4788 SvGROW(sv, len + 1);
4790 Move(ptr,dptr,len,char);
4793 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4798 =for apidoc sv_setpvn_mg
4800 Like C<sv_setpvn>, but also handles 'set' magic.
4806 Perl_sv_setpvn_mg(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
4808 sv_setpvn(sv,ptr,len);
4813 =for apidoc sv_setpv
4815 Copies a string into an SV. The string must be null-terminated. Does not
4816 handle 'set' magic. See C<sv_setpv_mg>.
4822 Perl_sv_setpv(pTHX_ register SV *sv, register const char *ptr)
4824 register STRLEN len;
4826 SV_CHECK_THINKFIRST_COW_DROP(sv);
4832 (void)SvUPGRADE(sv, SVt_PV);
4834 SvGROW(sv, len + 1);
4835 Move(ptr,SvPVX(sv),len+1,char);
4837 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4842 =for apidoc sv_setpv_mg
4844 Like C<sv_setpv>, but also handles 'set' magic.
4850 Perl_sv_setpv_mg(pTHX_ register SV *sv, register const char *ptr)
4857 =for apidoc sv_usepvn
4859 Tells an SV to use C<ptr> to find its string value. Normally the string is
4860 stored inside the SV but sv_usepvn allows the SV to use an outside string.
4861 The C<ptr> should point to memory that was allocated by C<malloc>. The
4862 string length, C<len>, must be supplied. This function will realloc the
4863 memory pointed to by C<ptr>, so that pointer should not be freed or used by
4864 the programmer after giving it to sv_usepvn. Does not handle 'set' magic.
4865 See C<sv_usepvn_mg>.
4871 Perl_sv_usepvn(pTHX_ register SV *sv, register char *ptr, register STRLEN len)
4873 SV_CHECK_THINKFIRST_COW_DROP(sv);
4874 (void)SvUPGRADE(sv, SVt_PV);
4879 (void)SvOOK_off(sv);
4880 if (SvPVX(sv) && SvLEN(sv))
4881 Safefree(SvPVX(sv));
4882 Renew(ptr, len+1, char);
4885 SvLEN_set(sv, len+1);
4887 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4892 =for apidoc sv_usepvn_mg
4894 Like C<sv_usepvn>, but also handles 'set' magic.
4900 Perl_sv_usepvn_mg(pTHX_ register SV *sv, register char *ptr, register STRLEN len)
4902 sv_usepvn(sv,ptr,len);
4906 #ifdef PERL_COPY_ON_WRITE
4907 /* Need to do this *after* making the SV normal, as we need the buffer
4908 pointer to remain valid until after we've copied it. If we let go too early,
4909 another thread could invalidate it by unsharing last of the same hash key
4910 (which it can do by means other than releasing copy-on-write Svs)
4911 or by changing the other copy-on-write SVs in the loop. */
4913 S_sv_release_COW(pTHX_ register SV *sv, char *pvx, STRLEN cur, STRLEN len,
4914 U32 hash, SV *after)
4916 if (len) { /* this SV was SvIsCOW_normal(sv) */
4917 /* we need to find the SV pointing to us. */
4918 SV *current = SV_COW_NEXT_SV(after);
4920 if (current == sv) {
4921 /* The SV we point to points back to us (there were only two of us
4923 Hence other SV is no longer copy on write either. */
4925 SvREADONLY_off(after);
4927 /* We need to follow the pointers around the loop. */
4929 while ((next = SV_COW_NEXT_SV(current)) != sv) {
4932 /* don't loop forever if the structure is bust, and we have
4933 a pointer into a closed loop. */
4934 assert (current != after);
4935 assert (SvPVX(current) == pvx);
4937 /* Make the SV before us point to the SV after us. */
4938 SV_COW_NEXT_SV_SET(current, after);
4941 unsharepvn(pvx, SvUTF8(sv) ? -(I32)cur : cur, hash);
4946 Perl_sv_release_IVX(pTHX_ register SV *sv)
4949 sv_force_normal_flags(sv, 0);
4950 return SvOOK_off(sv);
4954 =for apidoc sv_force_normal_flags
4956 Undo various types of fakery on an SV: if the PV is a shared string, make
4957 a private copy; if we're a ref, stop refing; if we're a glob, downgrade to
4958 an xpvmg; if we're a copy-on-write scalar, this is the on-write time when
4959 we do the copy, and is also used locally. If C<SV_COW_DROP_PV> is set
4960 then a copy-on-write scalar drops its PV buffer (if any) and becomes
4961 SvPOK_off rather than making a copy. (Used where this scalar is about to be
4962 set to some other value.) In addition, the C<flags> parameter gets passed to
4963 C<sv_unref_flags()> when unrefing. C<sv_force_normal> calls this function
4964 with flags set to 0.
4970 Perl_sv_force_normal_flags(pTHX_ register SV *sv, U32 flags)
4972 #ifdef PERL_COPY_ON_WRITE
4973 if (SvREADONLY(sv)) {
4974 /* At this point I believe I should acquire a global SV mutex. */
4976 char *pvx = SvPVX(sv);
4977 STRLEN len = SvLEN(sv);
4978 STRLEN cur = SvCUR(sv);
4979 U32 hash = SvUVX(sv);
4980 SV *next = SV_COW_NEXT_SV(sv); /* next COW sv in the loop. */
4982 PerlIO_printf(Perl_debug_log,
4983 "Copy on write: Force normal %ld\n",
4989 /* This SV doesn't own the buffer, so need to New() a new one: */
4992 if (flags & SV_COW_DROP_PV) {
4993 /* OK, so we don't need to copy our buffer. */
4996 SvGROW(sv, cur + 1);
4997 Move(pvx,SvPVX(sv),cur,char);
5001 sv_release_COW(sv, pvx, cur, len, hash, next);
5006 else if (IN_PERL_RUNTIME)
5007 Perl_croak(aTHX_ PL_no_modify);
5008 /* At this point I believe that I can drop the global SV mutex. */
5011 if (SvREADONLY(sv)) {
5013 char *pvx = SvPVX(sv);
5014 int is_utf8 = SvUTF8(sv);
5015 STRLEN len = SvCUR(sv);
5016 U32 hash = SvUVX(sv);
5021 SvGROW(sv, len + 1);
5022 Move(pvx,SvPVX(sv),len,char);
5024 unsharepvn(pvx, is_utf8 ? -(I32)len : len, hash);
5026 else if (IN_PERL_RUNTIME)
5027 Perl_croak(aTHX_ PL_no_modify);
5031 sv_unref_flags(sv, flags);
5032 else if (SvFAKE(sv) && SvTYPE(sv) == SVt_PVGV)
5037 =for apidoc sv_force_normal
5039 Undo various types of fakery on an SV: if the PV is a shared string, make
5040 a private copy; if we're a ref, stop refing; if we're a glob, downgrade to
5041 an xpvmg. See also C<sv_force_normal_flags>.
5047 Perl_sv_force_normal(pTHX_ register SV *sv)
5049 sv_force_normal_flags(sv, 0);
5055 Efficient removal of characters from the beginning of the string buffer.
5056 SvPOK(sv) must be true and the C<ptr> must be a pointer to somewhere inside
5057 the string buffer. The C<ptr> becomes the first character of the adjusted
5058 string. Uses the "OOK hack".
5059 Beware: after this function returns, C<ptr> and SvPVX(sv) may no longer
5060 refer to the same chunk of data.
5066 Perl_sv_chop(pTHX_ register SV *sv, register char *ptr)
5068 register STRLEN delta;
5069 if (!ptr || !SvPOKp(sv))
5071 delta = ptr - SvPVX(sv);
5072 SV_CHECK_THINKFIRST(sv);
5073 if (SvTYPE(sv) < SVt_PVIV)
5074 sv_upgrade(sv,SVt_PVIV);
5077 if (!SvLEN(sv)) { /* make copy of shared string */
5078 char *pvx = SvPVX(sv);
5079 STRLEN len = SvCUR(sv);
5080 SvGROW(sv, len + 1);
5081 Move(pvx,SvPVX(sv),len,char);
5085 /* Same SvOOK_on but SvOOK_on does a SvIOK_off
5086 and we do that anyway inside the SvNIOK_off
5088 SvFLAGS(sv) |= SVf_OOK;
5097 /* sv_catpvn() is now a macro using Perl_sv_catpvn_flags();
5098 * this function provided for binary compatibility only
5102 Perl_sv_catpvn(pTHX_ SV *dsv, const char* sstr, STRLEN slen)
5104 sv_catpvn_flags(dsv, sstr, slen, SV_GMAGIC);
5108 =for apidoc sv_catpvn
5110 Concatenates the string onto the end of the string which is in the SV. The
5111 C<len> indicates number of bytes to copy. If the SV has the UTF-8
5112 status set, then the bytes appended should be valid UTF-8.
5113 Handles 'get' magic, but not 'set' magic. See C<sv_catpvn_mg>.
5115 =for apidoc sv_catpvn_flags
5117 Concatenates the string onto the end of the string which is in the SV. The
5118 C<len> indicates number of bytes to copy. If the SV has the UTF-8
5119 status set, then the bytes appended should be valid UTF-8.
5120 If C<flags> has C<SV_GMAGIC> bit set, will C<mg_get> on C<dsv> if
5121 appropriate, else not. C<sv_catpvn> and C<sv_catpvn_nomg> are implemented
5122 in terms of this function.
5128 Perl_sv_catpvn_flags(pTHX_ register SV *dsv, register const char *sstr, register STRLEN slen, I32 flags)
5133 dstr = SvPV_force_flags(dsv, dlen, flags);
5134 SvGROW(dsv, dlen + slen + 1);
5137 Move(sstr, SvPVX(dsv) + dlen, slen, char);
5140 (void)SvPOK_only_UTF8(dsv); /* validate pointer */
5145 =for apidoc sv_catpvn_mg
5147 Like C<sv_catpvn>, but also handles 'set' magic.
5153 Perl_sv_catpvn_mg(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
5155 sv_catpvn(sv,ptr,len);
5159 /* sv_catsv() is now a macro using Perl_sv_catsv_flags();
5160 * this function provided for binary compatibility only
5164 Perl_sv_catsv(pTHX_ SV *dstr, register SV *sstr)
5166 sv_catsv_flags(dstr, sstr, SV_GMAGIC);
5170 =for apidoc sv_catsv
5172 Concatenates the string from SV C<ssv> onto the end of the string in
5173 SV C<dsv>. Modifies C<dsv> but not C<ssv>. Handles 'get' magic, but
5174 not 'set' magic. See C<sv_catsv_mg>.
5176 =for apidoc sv_catsv_flags
5178 Concatenates the string from SV C<ssv> onto the end of the string in
5179 SV C<dsv>. Modifies C<dsv> but not C<ssv>. If C<flags> has C<SV_GMAGIC>
5180 bit set, will C<mg_get> on the SVs if appropriate, else not. C<sv_catsv>
5181 and C<sv_catsv_nomg> are implemented in terms of this function.
5186 Perl_sv_catsv_flags(pTHX_ SV *dsv, register SV *ssv, I32 flags)
5192 if ((spv = SvPV(ssv, slen))) {
5193 /* sutf8 and dutf8 were type bool, but under USE_ITHREADS,
5194 gcc version 2.95.2 20000220 (Debian GNU/Linux) for
5195 Linux xxx 2.2.17 on sparc64 with gcc -O2, we erroneously
5196 get dutf8 = 0x20000000, (i.e. SVf_UTF8) even though
5197 dsv->sv_flags doesn't have that bit set.
5198 Andy Dougherty 12 Oct 2001
5200 I32 sutf8 = DO_UTF8(ssv);
5203 if (SvGMAGICAL(dsv) && (flags & SV_GMAGIC))
5205 dutf8 = DO_UTF8(dsv);
5207 if (dutf8 != sutf8) {
5209 /* Not modifying source SV, so taking a temporary copy. */
5210 SV* csv = sv_2mortal(newSVpvn(spv, slen));
5212 sv_utf8_upgrade(csv);
5213 spv = SvPV(csv, slen);
5216 sv_utf8_upgrade_nomg(dsv);
5218 sv_catpvn_nomg(dsv, spv, slen);
5223 =for apidoc sv_catsv_mg
5225 Like C<sv_catsv>, but also handles 'set' magic.
5231 Perl_sv_catsv_mg(pTHX_ SV *dsv, register SV *ssv)
5238 =for apidoc sv_catpv
5240 Concatenates the string onto the end of the string which is in the SV.
5241 If the SV has the UTF-8 status set, then the bytes appended should be
5242 valid UTF-8. Handles 'get' magic, but not 'set' magic. See C<sv_catpv_mg>.
5247 Perl_sv_catpv(pTHX_ register SV *sv, register const char *ptr)
5249 register STRLEN len;
5255 junk = SvPV_force(sv, tlen);
5257 SvGROW(sv, tlen + len + 1);
5260 Move(ptr,SvPVX(sv)+tlen,len+1,char);
5262 (void)SvPOK_only_UTF8(sv); /* validate pointer */
5267 =for apidoc sv_catpv_mg
5269 Like C<sv_catpv>, but also handles 'set' magic.
5275 Perl_sv_catpv_mg(pTHX_ register SV *sv, register const char *ptr)
5284 Create a new null SV, or if len > 0, create a new empty SVt_PV type SV
5285 with an initial PV allocation of len+1. Normally accessed via the C<NEWSV>
5292 Perl_newSV(pTHX_ STRLEN len)
5298 sv_upgrade(sv, SVt_PV);
5299 SvGROW(sv, len + 1);
5304 =for apidoc sv_magicext
5306 Adds magic to an SV, upgrading it if necessary. Applies the
5307 supplied vtable and returns pointer to the magic added.
5309 Note that sv_magicext will allow things that sv_magic will not.
5310 In particular you can add magic to SvREADONLY SVs and and more than
5311 one instance of the same 'how'
5313 I C<namelen> is greater then zero then a savepvn() I<copy> of C<name> is stored,
5314 if C<namelen> is zero then C<name> is stored as-is and - as another special
5315 case - if C<(name && namelen == HEf_SVKEY)> then C<name> is assumed to contain
5316 an C<SV*> and has its REFCNT incremented
5318 (This is now used as a subroutine by sv_magic.)
5323 Perl_sv_magicext(pTHX_ SV* sv, SV* obj, int how, MGVTBL *vtable,
5324 const char* name, I32 namlen)
5328 if (SvTYPE(sv) < SVt_PVMG) {
5329 (void)SvUPGRADE(sv, SVt_PVMG);
5331 Newz(702,mg, 1, MAGIC);
5332 mg->mg_moremagic = SvMAGIC(sv);
5335 /* Some magic sontains a reference loop, where the sv and object refer to
5336 each other. To prevent a reference loop that would prevent such
5337 objects being freed, we look for such loops and if we find one we
5338 avoid incrementing the object refcount.
5340 Note we cannot do this to avoid self-tie loops as intervening RV must
5341 have its REFCNT incremented to keep it in existence.
5344 if (!obj || obj == sv ||
5345 how == PERL_MAGIC_arylen ||
5346 how == PERL_MAGIC_qr ||
5347 (SvTYPE(obj) == SVt_PVGV &&
5348 (GvSV(obj) == sv || GvHV(obj) == (HV*)sv || GvAV(obj) == (AV*)sv ||
5349 GvCV(obj) == (CV*)sv || GvIOp(obj) == (IO*)sv ||
5350 GvFORM(obj) == (CV*)sv)))
5355 mg->mg_obj = SvREFCNT_inc(obj);
5356 mg->mg_flags |= MGf_REFCOUNTED;
5359 /* Normal self-ties simply pass a null object, and instead of
5360 using mg_obj directly, use the SvTIED_obj macro to produce a
5361 new RV as needed. For glob "self-ties", we are tieing the PVIO
5362 with an RV obj pointing to the glob containing the PVIO. In
5363 this case, to avoid a reference loop, we need to weaken the
5367 if (how == PERL_MAGIC_tiedscalar && SvTYPE(sv) == SVt_PVIO &&
5368 obj && SvROK(obj) && GvIO(SvRV(obj)) == (IO*)sv)
5374 mg->mg_len = namlen;
5377 mg->mg_ptr = savepvn(name, namlen);
5378 else if (namlen == HEf_SVKEY)
5379 mg->mg_ptr = (char*)SvREFCNT_inc((SV*)name);
5381 mg->mg_ptr = (char *) name;
5383 mg->mg_virtual = vtable;
5387 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
5392 =for apidoc sv_magic
5394 Adds magic to an SV. First upgrades C<sv> to type C<SVt_PVMG> if necessary,
5395 then adds a new magic item of type C<how> to the head of the magic list.
5401 Perl_sv_magic(pTHX_ register SV *sv, SV *obj, int how, const char *name, I32 namlen)
5406 #ifdef PERL_COPY_ON_WRITE
5408 sv_force_normal_flags(sv, 0);
5410 if (SvREADONLY(sv)) {
5412 && how != PERL_MAGIC_regex_global
5413 && how != PERL_MAGIC_bm
5414 && how != PERL_MAGIC_fm
5415 && how != PERL_MAGIC_sv
5416 && how != PERL_MAGIC_backref
5419 Perl_croak(aTHX_ PL_no_modify);
5422 if (SvMAGICAL(sv) || (how == PERL_MAGIC_taint && SvTYPE(sv) >= SVt_PVMG)) {
5423 if (SvMAGIC(sv) && (mg = mg_find(sv, how))) {
5424 /* sv_magic() refuses to add a magic of the same 'how' as an
5427 if (how == PERL_MAGIC_taint)
5435 vtable = &PL_vtbl_sv;
5437 case PERL_MAGIC_overload:
5438 vtable = &PL_vtbl_amagic;
5440 case PERL_MAGIC_overload_elem:
5441 vtable = &PL_vtbl_amagicelem;
5443 case PERL_MAGIC_overload_table:
5444 vtable = &PL_vtbl_ovrld;
5447 vtable = &PL_vtbl_bm;
5449 case PERL_MAGIC_regdata:
5450 vtable = &PL_vtbl_regdata;
5452 case PERL_MAGIC_regdatum:
5453 vtable = &PL_vtbl_regdatum;
5455 case PERL_MAGIC_env:
5456 vtable = &PL_vtbl_env;
5459 vtable = &PL_vtbl_fm;
5461 case PERL_MAGIC_envelem:
5462 vtable = &PL_vtbl_envelem;
5464 case PERL_MAGIC_regex_global:
5465 vtable = &PL_vtbl_mglob;
5467 case PERL_MAGIC_isa:
5468 vtable = &PL_vtbl_isa;
5470 case PERL_MAGIC_isaelem:
5471 vtable = &PL_vtbl_isaelem;
5473 case PERL_MAGIC_nkeys:
5474 vtable = &PL_vtbl_nkeys;
5476 case PERL_MAGIC_dbfile:
5479 case PERL_MAGIC_dbline:
5480 vtable = &PL_vtbl_dbline;
5482 #ifdef USE_LOCALE_COLLATE
5483 case PERL_MAGIC_collxfrm:
5484 vtable = &PL_vtbl_collxfrm;
5486 #endif /* USE_LOCALE_COLLATE */
5487 case PERL_MAGIC_tied:
5488 vtable = &PL_vtbl_pack;
5490 case PERL_MAGIC_tiedelem:
5491 case PERL_MAGIC_tiedscalar:
5492 vtable = &PL_vtbl_packelem;
5495 vtable = &PL_vtbl_regexp;
5497 case PERL_MAGIC_sig:
5498 vtable = &PL_vtbl_sig;
5500 case PERL_MAGIC_sigelem:
5501 vtable = &PL_vtbl_sigelem;
5503 case PERL_MAGIC_taint:
5504 vtable = &PL_vtbl_taint;
5506 case PERL_MAGIC_uvar:
5507 vtable = &PL_vtbl_uvar;
5509 case PERL_MAGIC_vec:
5510 vtable = &PL_vtbl_vec;
5512 case PERL_MAGIC_vstring:
5515 case PERL_MAGIC_utf8:
5516 vtable = &PL_vtbl_utf8;
5518 case PERL_MAGIC_substr:
5519 vtable = &PL_vtbl_substr;
5521 case PERL_MAGIC_defelem:
5522 vtable = &PL_vtbl_defelem;
5524 case PERL_MAGIC_glob:
5525 vtable = &PL_vtbl_glob;
5527 case PERL_MAGIC_arylen:
5528 vtable = &PL_vtbl_arylen;
5530 case PERL_MAGIC_pos:
5531 vtable = &PL_vtbl_pos;
5533 case PERL_MAGIC_backref:
5534 vtable = &PL_vtbl_backref;
5536 case PERL_MAGIC_ext:
5537 /* Reserved for use by extensions not perl internals. */
5538 /* Useful for attaching extension internal data to perl vars. */
5539 /* Note that multiple extensions may clash if magical scalars */
5540 /* etc holding private data from one are passed to another. */
5543 Perl_croak(aTHX_ "Don't know how to handle magic of type \\%o", how);
5546 /* Rest of work is done else where */
5547 mg = sv_magicext(sv,obj,how,vtable,name,namlen);
5550 case PERL_MAGIC_taint:
5553 case PERL_MAGIC_ext:
5554 case PERL_MAGIC_dbfile:
5561 =for apidoc sv_unmagic
5563 Removes all magic of type C<type> from an SV.
5569 Perl_sv_unmagic(pTHX_ SV *sv, int type)
5573 if (SvTYPE(sv) < SVt_PVMG || !SvMAGIC(sv))
5576 for (mg = *mgp; mg; mg = *mgp) {
5577 if (mg->mg_type == type) {
5578 MGVTBL* vtbl = mg->mg_virtual;
5579 *mgp = mg->mg_moremagic;
5580 if (vtbl && vtbl->svt_free)
5581 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
5582 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
5584 Safefree(mg->mg_ptr);
5585 else if (mg->mg_len == HEf_SVKEY)
5586 SvREFCNT_dec((SV*)mg->mg_ptr);
5587 else if (mg->mg_type == PERL_MAGIC_utf8 && mg->mg_ptr)
5588 Safefree(mg->mg_ptr);
5590 if (mg->mg_flags & MGf_REFCOUNTED)
5591 SvREFCNT_dec(mg->mg_obj);
5595 mgp = &mg->mg_moremagic;
5599 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_NOK|SVp_POK)) >> PRIVSHIFT;
5606 =for apidoc sv_rvweaken
5608 Weaken a reference: set the C<SvWEAKREF> flag on this RV; give the
5609 referred-to SV C<PERL_MAGIC_backref> magic if it hasn't already; and
5610 push a back-reference to this RV onto the array of backreferences
5611 associated with that magic.
5617 Perl_sv_rvweaken(pTHX_ SV *sv)
5620 if (!SvOK(sv)) /* let undefs pass */
5623 Perl_croak(aTHX_ "Can't weaken a nonreference");
5624 else if (SvWEAKREF(sv)) {
5625 if (ckWARN(WARN_MISC))
5626 Perl_warner(aTHX_ packWARN(WARN_MISC), "Reference is already weak");
5630 sv_add_backref(tsv, sv);
5636 /* Give tsv backref magic if it hasn't already got it, then push a
5637 * back-reference to sv onto the array associated with the backref magic.
5641 S_sv_add_backref(pTHX_ SV *tsv, SV *sv)
5645 if (SvMAGICAL(tsv) && (mg = mg_find(tsv, PERL_MAGIC_backref)))
5646 av = (AV*)mg->mg_obj;
5649 sv_magic(tsv, (SV*)av, PERL_MAGIC_backref, NULL, 0);
5650 /* av now has a refcnt of 2, which avoids it getting freed
5651 * before us during global cleanup. The extra ref is removed
5652 * by magic_killbackrefs() when tsv is being freed */
5654 if (AvFILLp(av) >= AvMAX(av)) {
5656 SV **svp = AvARRAY(av);
5657 for (i = AvFILLp(av); i >= 0; i--)
5659 svp[i] = sv; /* reuse the slot */
5662 av_extend(av, AvFILLp(av)+1);
5664 AvARRAY(av)[++AvFILLp(av)] = sv; /* av_push() */
5667 /* delete a back-reference to ourselves from the backref magic associated
5668 * with the SV we point to.
5672 S_sv_del_backref(pTHX_ SV *sv)
5679 if (!SvMAGICAL(tsv) || !(mg = mg_find(tsv, PERL_MAGIC_backref)))
5680 Perl_croak(aTHX_ "panic: del_backref");
5681 av = (AV *)mg->mg_obj;
5683 for (i = AvFILLp(av); i >= 0; i--)
5684 if (svp[i] == sv) svp[i] = Nullsv;
5688 =for apidoc sv_insert
5690 Inserts a string at the specified offset/length within the SV. Similar to
5691 the Perl substr() function.
5697 Perl_sv_insert(pTHX_ SV *bigstr, STRLEN offset, STRLEN len, char *little, STRLEN littlelen)
5701 register char *midend;
5702 register char *bigend;
5708 Perl_croak(aTHX_ "Can't modify non-existent substring");
5709 SvPV_force(bigstr, curlen);
5710 (void)SvPOK_only_UTF8(bigstr);
5711 if (offset + len > curlen) {
5712 SvGROW(bigstr, offset+len+1);
5713 Zero(SvPVX(bigstr)+curlen, offset+len-curlen, char);
5714 SvCUR_set(bigstr, offset+len);
5718 i = littlelen - len;
5719 if (i > 0) { /* string might grow */
5720 big = SvGROW(bigstr, SvCUR(bigstr) + i + 1);
5721 mid = big + offset + len;
5722 midend = bigend = big + SvCUR(bigstr);
5725 while (midend > mid) /* shove everything down */
5726 *--bigend = *--midend;
5727 Move(little,big+offset,littlelen,char);
5733 Move(little,SvPVX(bigstr)+offset,len,char);
5738 big = SvPVX(bigstr);
5741 bigend = big + SvCUR(bigstr);
5743 if (midend > bigend)
5744 Perl_croak(aTHX_ "panic: sv_insert");
5746 if (mid - big > bigend - midend) { /* faster to shorten from end */
5748 Move(little, mid, littlelen,char);
5751 i = bigend - midend;
5753 Move(midend, mid, i,char);
5757 SvCUR_set(bigstr, mid - big);
5760 else if ((i = mid - big)) { /* faster from front */
5761 midend -= littlelen;
5763 sv_chop(bigstr,midend-i);
5768 Move(little, mid, littlelen,char);
5770 else if (littlelen) {
5771 midend -= littlelen;
5772 sv_chop(bigstr,midend);
5773 Move(little,midend,littlelen,char);
5776 sv_chop(bigstr,midend);
5782 =for apidoc sv_replace
5784 Make the first argument a copy of the second, then delete the original.
5785 The target SV physically takes over ownership of the body of the source SV
5786 and inherits its flags; however, the target keeps any magic it owns,
5787 and any magic in the source is discarded.
5788 Note that this is a rather specialist SV copying operation; most of the
5789 time you'll want to use C<sv_setsv> or one of its many macro front-ends.
5795 Perl_sv_replace(pTHX_ register SV *sv, register SV *nsv)
5797 U32 refcnt = SvREFCNT(sv);
5798 SV_CHECK_THINKFIRST_COW_DROP(sv);
5799 if (SvREFCNT(nsv) != 1 && ckWARN_d(WARN_INTERNAL))
5800 Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Reference miscount in sv_replace()");
5801 if (SvMAGICAL(sv)) {
5805 sv_upgrade(nsv, SVt_PVMG);
5806 SvMAGIC(nsv) = SvMAGIC(sv);
5807 SvFLAGS(nsv) |= SvMAGICAL(sv);
5813 assert(!SvREFCNT(sv));
5814 StructCopy(nsv,sv,SV);
5815 #ifdef PERL_COPY_ON_WRITE
5816 if (SvIsCOW_normal(nsv)) {
5817 /* We need to follow the pointers around the loop to make the
5818 previous SV point to sv, rather than nsv. */
5821 while ((next = SV_COW_NEXT_SV(current)) != nsv) {
5824 assert(SvPVX(current) == SvPVX(nsv));
5826 /* Make the SV before us point to the SV after us. */
5828 PerlIO_printf(Perl_debug_log, "previous is\n");
5830 PerlIO_printf(Perl_debug_log,
5831 "move it from 0x%"UVxf" to 0x%"UVxf"\n",
5832 (UV) SV_COW_NEXT_SV(current), (UV) sv);
5834 SV_COW_NEXT_SV_SET(current, sv);
5837 SvREFCNT(sv) = refcnt;
5838 SvFLAGS(nsv) |= SVTYPEMASK; /* Mark as freed */
5844 =for apidoc sv_clear
5846 Clear an SV: call any destructors, free up any memory used by the body,
5847 and free the body itself. The SV's head is I<not> freed, although
5848 its type is set to all 1's so that it won't inadvertently be assumed
5849 to be live during global destruction etc.
5850 This function should only be called when REFCNT is zero. Most of the time
5851 you'll want to call C<sv_free()> (or its macro wrapper C<SvREFCNT_dec>)
5858 Perl_sv_clear(pTHX_ register SV *sv)
5862 assert(SvREFCNT(sv) == 0);
5865 if (PL_defstash) { /* Still have a symbol table? */
5872 stash = SvSTASH(sv);
5873 destructor = StashHANDLER(stash,DESTROY);
5875 SV* tmpref = newRV(sv);
5876 SvREADONLY_on(tmpref); /* DESTROY() could be naughty */
5878 PUSHSTACKi(PERLSI_DESTROY);
5883 call_sv((SV*)destructor, G_DISCARD|G_EVAL|G_KEEPERR|G_VOID);
5889 if(SvREFCNT(tmpref) < 2) {
5890 /* tmpref is not kept alive! */
5895 SvREFCNT_dec(tmpref);
5897 } while (SvOBJECT(sv) && SvSTASH(sv) != stash);
5901 if (PL_in_clean_objs)
5902 Perl_croak(aTHX_ "DESTROY created new reference to dead object '%s'",
5904 /* DESTROY gave object new lease on life */
5910 SvREFCNT_dec(SvSTASH(sv)); /* possibly of changed persuasion */
5911 SvOBJECT_off(sv); /* Curse the object. */
5912 if (SvTYPE(sv) != SVt_PVIO)
5913 --PL_sv_objcount; /* XXX Might want something more general */
5916 if (SvTYPE(sv) >= SVt_PVMG) {
5919 if (SvFLAGS(sv) & SVpad_TYPED)
5920 SvREFCNT_dec(SvSTASH(sv));
5923 switch (SvTYPE(sv)) {
5926 IoIFP(sv) != PerlIO_stdin() &&
5927 IoIFP(sv) != PerlIO_stdout() &&
5928 IoIFP(sv) != PerlIO_stderr())
5930 io_close((IO*)sv, FALSE);
5932 if (IoDIRP(sv) && !(IoFLAGS(sv) & IOf_FAKE_DIRP))
5933 PerlDir_close(IoDIRP(sv));
5934 IoDIRP(sv) = (DIR*)NULL;
5935 Safefree(IoTOP_NAME(sv));
5936 Safefree(IoFMT_NAME(sv));
5937 Safefree(IoBOTTOM_NAME(sv));
5952 if (LvTYPE(sv) == 'T') { /* for tie: return HE to pool */
5953 SvREFCNT_dec(HeKEY_sv((HE*)LvTARG(sv)));
5954 HeNEXT((HE*)LvTARG(sv)) = PL_hv_fetch_ent_mh;
5955 PL_hv_fetch_ent_mh = (HE*)LvTARG(sv);
5957 else if (LvTYPE(sv) != 't') /* unless tie: unrefcnted fake SV** */
5958 SvREFCNT_dec(LvTARG(sv));
5962 Safefree(GvNAME(sv));
5963 /* cannot decrease stash refcount yet, as we might recursively delete
5964 ourselves when the refcnt drops to zero. Delay SvREFCNT_dec
5965 of stash until current sv is completely gone.
5966 -- JohnPC, 27 Mar 1998 */
5967 stash = GvSTASH(sv);
5973 (void)SvOOK_off(sv);
5981 SvREFCNT_dec(SvRV(sv));
5983 #ifdef PERL_COPY_ON_WRITE
5984 else if (SvPVX(sv)) {
5986 /* I believe I need to grab the global SV mutex here and
5987 then recheck the COW status. */
5989 PerlIO_printf(Perl_debug_log, "Copy on write: clear\n");
5992 sv_release_COW(sv, SvPVX(sv), SvCUR(sv), SvLEN(sv),
5993 SvUVX(sv), SV_COW_NEXT_SV(sv));
5994 /* And drop it here. */
5996 } else if (SvLEN(sv)) {
5997 Safefree(SvPVX(sv));
6001 else if (SvPVX(sv) && SvLEN(sv))
6002 Safefree(SvPVX(sv));
6003 else if (SvPVX(sv) && SvREADONLY(sv) && SvFAKE(sv)) {
6004 unsharepvn(SvPVX(sv),
6005 SvUTF8(sv) ? -(I32)SvCUR(sv) : SvCUR(sv),
6019 switch (SvTYPE(sv)) {
6035 del_XPVIV(SvANY(sv));
6038 del_XPVNV(SvANY(sv));
6041 del_XPVMG(SvANY(sv));
6044 del_XPVLV(SvANY(sv));
6047 del_XPVAV(SvANY(sv));
6050 del_XPVHV(SvANY(sv));
6053 del_XPVCV(SvANY(sv));
6056 del_XPVGV(SvANY(sv));
6057 /* code duplication for increased performance. */
6058 SvFLAGS(sv) &= SVf_BREAK;
6059 SvFLAGS(sv) |= SVTYPEMASK;
6060 /* decrease refcount of the stash that owns this GV, if any */
6062 SvREFCNT_dec(stash);
6063 return; /* not break, SvFLAGS reset already happened */
6065 del_XPVBM(SvANY(sv));
6068 del_XPVFM(SvANY(sv));
6071 del_XPVIO(SvANY(sv));
6074 SvFLAGS(sv) &= SVf_BREAK;
6075 SvFLAGS(sv) |= SVTYPEMASK;
6079 =for apidoc sv_newref
6081 Increment an SV's reference count. Use the C<SvREFCNT_inc()> wrapper
6088 Perl_sv_newref(pTHX_ SV *sv)
6098 Decrement an SV's reference count, and if it drops to zero, call
6099 C<sv_clear> to invoke destructors and free up any memory used by
6100 the body; finally, deallocate the SV's head itself.
6101 Normally called via a wrapper macro C<SvREFCNT_dec>.
6107 Perl_sv_free(pTHX_ SV *sv)
6111 if (SvREFCNT(sv) == 0) {
6112 if (SvFLAGS(sv) & SVf_BREAK)
6113 /* this SV's refcnt has been artificially decremented to
6114 * trigger cleanup */
6116 if (PL_in_clean_all) /* All is fair */
6118 if (SvREADONLY(sv) && SvIMMORTAL(sv)) {
6119 /* make sure SvREFCNT(sv)==0 happens very seldom */
6120 SvREFCNT(sv) = (~(U32)0)/2;
6123 if (ckWARN_d(WARN_INTERNAL))
6124 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
6125 "Attempt to free unreferenced scalar: SV 0x%"UVxf
6126 pTHX__FORMAT, PTR2UV(sv) pTHX__VALUE);
6129 if (--(SvREFCNT(sv)) > 0)
6131 Perl_sv_free2(aTHX_ sv);
6135 Perl_sv_free2(pTHX_ SV *sv)
6139 if (ckWARN_d(WARN_DEBUGGING))
6140 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
6141 "Attempt to free temp prematurely: SV 0x%"UVxf
6142 pTHX__FORMAT, PTR2UV(sv) pTHX__VALUE);
6146 if (SvREADONLY(sv) && SvIMMORTAL(sv)) {
6147 /* make sure SvREFCNT(sv)==0 happens very seldom */
6148 SvREFCNT(sv) = (~(U32)0)/2;
6159 Returns the length of the string in the SV. Handles magic and type
6160 coercion. See also C<SvCUR>, which gives raw access to the xpv_cur slot.
6166 Perl_sv_len(pTHX_ register SV *sv)
6174 len = mg_length(sv);
6176 (void)SvPV(sv, len);
6181 =for apidoc sv_len_utf8
6183 Returns the number of characters in the string in an SV, counting wide
6184 UTF-8 bytes as a single character. Handles magic and type coercion.
6190 * The length is cached in PERL_UTF8_magic, in the mg_len field. Also the
6191 * mg_ptr is used, by sv_pos_u2b(), see the comments of S_utf8_mg_pos_init().
6192 * (Note that the mg_len is not the length of the mg_ptr field.)
6197 Perl_sv_len_utf8(pTHX_ register SV *sv)
6203 return mg_length(sv);
6207 U8 *s = (U8*)SvPV(sv, len);
6208 MAGIC *mg = SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_utf8) : 0;
6210 if (mg && mg->mg_len != -1 && (mg->mg_len > 0 || len == 0)) {
6212 #ifdef PERL_UTF8_CACHE_ASSERT
6213 assert(ulen == Perl_utf8_length(aTHX_ s, s + len));
6217 ulen = Perl_utf8_length(aTHX_ s, s + len);
6218 if (!mg && !SvREADONLY(sv)) {
6219 sv_magic(sv, 0, PERL_MAGIC_utf8, 0, 0);
6220 mg = mg_find(sv, PERL_MAGIC_utf8);
6230 /* S_utf8_mg_pos_init() is used to initialize the mg_ptr field of
6231 * a PERL_UTF8_magic. The mg_ptr is used to store the mapping
6232 * between UTF-8 and byte offsets. There are two (substr offset and substr
6233 * length, the i offset, PERL_MAGIC_UTF8_CACHESIZE) times two (UTF-8 offset
6234 * and byte offset) cache positions.
6236 * The mg_len field is used by sv_len_utf8(), see its comments.
6237 * Note that the mg_len is not the length of the mg_ptr field.
6241 S_utf8_mg_pos_init(pTHX_ SV *sv, MAGIC **mgp, STRLEN **cachep, I32 i, I32 *offsetp, U8 *s, U8 *start)
6245 if (SvMAGICAL(sv) && !SvREADONLY(sv)) {
6247 *mgp = sv_magicext(sv, 0, PERL_MAGIC_utf8, &PL_vtbl_utf8, 0, 0);
6251 *cachep = (STRLEN *) (*mgp)->mg_ptr;
6253 Newz(0, *cachep, PERL_MAGIC_UTF8_CACHESIZE * 2, STRLEN);
6254 (*mgp)->mg_ptr = (char *) *cachep;
6258 (*cachep)[i] = *offsetp;
6259 (*cachep)[i+1] = s - start;
6267 * S_utf8_mg_pos() is used to query and update mg_ptr field of
6268 * a PERL_UTF8_magic. The mg_ptr is used to store the mapping
6269 * between UTF-8 and byte offsets. See also the comments of
6270 * S_utf8_mg_pos_init().
6274 S_utf8_mg_pos(pTHX_ SV *sv, MAGIC **mgp, STRLEN **cachep, I32 i, I32 *offsetp, I32 uoff, U8 **sp, U8 *start, U8 *send)
6278 if (SvMAGICAL(sv) && !SvREADONLY(sv)) {
6280 *mgp = mg_find(sv, PERL_MAGIC_utf8);
6281 if (*mgp && (*mgp)->mg_ptr) {
6282 *cachep = (STRLEN *) (*mgp)->mg_ptr;
6283 ASSERT_UTF8_CACHE(*cachep);
6284 if ((*cachep)[i] == (STRLEN)uoff) /* An exact match. */
6286 else { /* We will skip to the right spot. */
6291 /* The assumption is that going backward is half
6292 * the speed of going forward (that's where the
6293 * 2 * backw in the below comes from). (The real
6294 * figure of course depends on the UTF-8 data.) */
6296 if ((*cachep)[i] > (STRLEN)uoff) {
6298 backw = (*cachep)[i] - (STRLEN)uoff;
6300 if (forw < 2 * backw)
6303 p = start + (*cachep)[i+1];
6305 /* Try this only for the substr offset (i == 0),
6306 * not for the substr length (i == 2). */
6307 else if (i == 0) { /* (*cachep)[i] < uoff */
6308 STRLEN ulen = sv_len_utf8(sv);
6310 if ((STRLEN)uoff < ulen) {
6311 forw = (STRLEN)uoff - (*cachep)[i];
6312 backw = ulen - (STRLEN)uoff;
6314 if (forw < 2 * backw)
6315 p = start + (*cachep)[i+1];
6320 /* If the string is not long enough for uoff,
6321 * we could extend it, but not at this low a level. */
6325 if (forw < 2 * backw) {
6332 while (UTF8_IS_CONTINUATION(*p))
6337 /* Update the cache. */
6338 (*cachep)[i] = (STRLEN)uoff;
6339 (*cachep)[i+1] = p - start;
6341 /* Drop the stale "length" cache */
6350 if (found) { /* Setup the return values. */
6351 *offsetp = (*cachep)[i+1];
6352 *sp = start + *offsetp;
6355 *offsetp = send - start;
6357 else if (*sp < start) {
6363 #ifdef PERL_UTF8_CACHE_ASSERT
6368 while (n-- && s < send)
6372 assert(*offsetp == s - start);
6373 assert((*cachep)[0] == (STRLEN)uoff);
6374 assert((*cachep)[1] == *offsetp);
6376 ASSERT_UTF8_CACHE(*cachep);
6385 =for apidoc sv_pos_u2b
6387 Converts the value pointed to by offsetp from a count of UTF-8 chars from
6388 the start of the string, to a count of the equivalent number of bytes; if
6389 lenp is non-zero, it does the same to lenp, but this time starting from
6390 the offset, rather than from the start of the string. Handles magic and
6397 * sv_pos_u2b() uses, like sv_pos_b2u(), the mg_ptr of the potential
6398 * PERL_UTF8_magic of the sv to store the mapping between UTF-8 and
6399 * byte offsets. See also the comments of S_utf8_mg_pos().
6404 Perl_sv_pos_u2b(pTHX_ register SV *sv, I32* offsetp, I32* lenp)
6415 start = s = (U8*)SvPV(sv, len);
6417 I32 uoffset = *offsetp;
6422 if (utf8_mg_pos(sv, &mg, &cache, 0, offsetp, *offsetp, &s, start, send))
6424 if (!found && uoffset > 0) {
6425 while (s < send && uoffset--)
6429 if (utf8_mg_pos_init(sv, &mg, &cache, 0, offsetp, s, start))
6431 *offsetp = s - start;
6436 if (utf8_mg_pos(sv, &mg, &cache, 2, lenp, *lenp + *offsetp, &s, start, send)) {
6440 if (!found && *lenp > 0) {
6443 while (s < send && ulen--)
6447 utf8_mg_pos_init(sv, &mg, &cache, 2, lenp, s, start);
6451 ASSERT_UTF8_CACHE(cache);
6463 =for apidoc sv_pos_b2u
6465 Converts the value pointed to by offsetp from a count of bytes from the
6466 start of the string, to a count of the equivalent number of UTF-8 chars.
6467 Handles magic and type coercion.
6473 * sv_pos_b2u() uses, like sv_pos_u2b(), the mg_ptr of the potential
6474 * PERL_UTF8_magic of the sv to store the mapping between UTF-8 and
6475 * byte offsets. See also the comments of S_utf8_mg_pos().
6480 Perl_sv_pos_b2u(pTHX_ register SV* sv, I32* offsetp)
6488 s = (U8*)SvPV(sv, len);
6489 if ((I32)len < *offsetp)
6490 Perl_croak(aTHX_ "panic: sv_pos_b2u: bad byte offset");
6492 U8* send = s + *offsetp;
6494 STRLEN *cache = NULL;
6498 if (SvMAGICAL(sv) && !SvREADONLY(sv)) {
6499 mg = mg_find(sv, PERL_MAGIC_utf8);
6500 if (mg && mg->mg_ptr) {
6501 cache = (STRLEN *) mg->mg_ptr;
6502 if (cache[1] == (STRLEN)*offsetp) {
6503 /* An exact match. */
6504 *offsetp = cache[0];
6508 else if (cache[1] < (STRLEN)*offsetp) {
6509 /* We already know part of the way. */
6512 /* Let the below loop do the rest. */
6514 else { /* cache[1] > *offsetp */
6515 /* We already know all of the way, now we may
6516 * be able to walk back. The same assumption
6517 * is made as in S_utf8_mg_pos(), namely that
6518 * walking backward is twice slower than
6519 * walking forward. */
6520 STRLEN forw = *offsetp;
6521 STRLEN backw = cache[1] - *offsetp;
6523 if (!(forw < 2 * backw)) {
6524 U8 *p = s + cache[1];
6531 while (UTF8_IS_CONTINUATION(*p)) {
6539 *offsetp = cache[0];
6541 /* Drop the stale "length" cache */
6549 ASSERT_UTF8_CACHE(cache);
6555 /* Call utf8n_to_uvchr() to validate the sequence
6556 * (unless a simple non-UTF character) */
6557 if (!UTF8_IS_INVARIANT(*s))
6558 utf8n_to_uvchr(s, UTF8SKIP(s), &n, 0);
6567 if (!SvREADONLY(sv)) {
6569 sv_magic(sv, 0, PERL_MAGIC_utf8, 0, 0);
6570 mg = mg_find(sv, PERL_MAGIC_utf8);
6575 Newz(0, cache, PERL_MAGIC_UTF8_CACHESIZE * 2, STRLEN);
6576 mg->mg_ptr = (char *) cache;
6581 cache[1] = *offsetp;
6582 /* Drop the stale "length" cache */
6595 Returns a boolean indicating whether the strings in the two SVs are
6596 identical. Is UTF-8 and 'use bytes' aware, handles get magic, and will
6597 coerce its args to strings if necessary.
6603 Perl_sv_eq(pTHX_ register SV *sv1, register SV *sv2)
6611 SV* svrecode = Nullsv;
6618 pv1 = SvPV(sv1, cur1);
6625 pv2 = SvPV(sv2, cur2);
6627 if (cur1 && cur2 && SvUTF8(sv1) != SvUTF8(sv2) && !IN_BYTES) {
6628 /* Differing utf8ness.
6629 * Do not UTF8size the comparands as a side-effect. */
6632 svrecode = newSVpvn(pv2, cur2);
6633 sv_recode_to_utf8(svrecode, PL_encoding);
6634 pv2 = SvPV(svrecode, cur2);
6637 svrecode = newSVpvn(pv1, cur1);
6638 sv_recode_to_utf8(svrecode, PL_encoding);
6639 pv1 = SvPV(svrecode, cur1);
6641 /* Now both are in UTF-8. */
6643 SvREFCNT_dec(svrecode);
6648 bool is_utf8 = TRUE;
6651 /* sv1 is the UTF-8 one,
6652 * if is equal it must be downgrade-able */
6653 char *pv = (char*)bytes_from_utf8((U8*)pv1,
6659 /* sv2 is the UTF-8 one,
6660 * if is equal it must be downgrade-able */
6661 char *pv = (char *)bytes_from_utf8((U8*)pv2,
6667 /* Downgrade not possible - cannot be eq */
6674 eq = (pv1 == pv2) || memEQ(pv1, pv2, cur1);
6677 SvREFCNT_dec(svrecode);
6688 Compares the strings in two SVs. Returns -1, 0, or 1 indicating whether the
6689 string in C<sv1> is less than, equal to, or greater than the string in
6690 C<sv2>. Is UTF-8 and 'use bytes' aware, handles get magic, and will
6691 coerce its args to strings if necessary. See also C<sv_cmp_locale>.
6697 Perl_sv_cmp(pTHX_ register SV *sv1, register SV *sv2)
6700 char *pv1, *pv2, *tpv = Nullch;
6702 SV *svrecode = Nullsv;
6709 pv1 = SvPV(sv1, cur1);
6716 pv2 = SvPV(sv2, cur2);
6718 if (cur1 && cur2 && SvUTF8(sv1) != SvUTF8(sv2) && !IN_BYTES) {
6719 /* Differing utf8ness.
6720 * Do not UTF8size the comparands as a side-effect. */
6723 svrecode = newSVpvn(pv2, cur2);
6724 sv_recode_to_utf8(svrecode, PL_encoding);
6725 pv2 = SvPV(svrecode, cur2);
6728 pv2 = tpv = (char*)bytes_to_utf8((U8*)pv2, &cur2);
6733 svrecode = newSVpvn(pv1, cur1);
6734 sv_recode_to_utf8(svrecode, PL_encoding);
6735 pv1 = SvPV(svrecode, cur1);
6738 pv1 = tpv = (char*)bytes_to_utf8((U8*)pv1, &cur1);
6744 cmp = cur2 ? -1 : 0;
6748 I32 retval = memcmp((void*)pv1, (void*)pv2, cur1 < cur2 ? cur1 : cur2);
6751 cmp = retval < 0 ? -1 : 1;
6752 } else if (cur1 == cur2) {
6755 cmp = cur1 < cur2 ? -1 : 1;
6760 SvREFCNT_dec(svrecode);
6769 =for apidoc sv_cmp_locale
6771 Compares the strings in two SVs in a locale-aware manner. Is UTF-8 and
6772 'use bytes' aware, handles get magic, and will coerce its args to strings
6773 if necessary. See also C<sv_cmp_locale>. See also C<sv_cmp>.
6779 Perl_sv_cmp_locale(pTHX_ register SV *sv1, register SV *sv2)
6781 #ifdef USE_LOCALE_COLLATE
6787 if (PL_collation_standard)
6791 pv1 = sv1 ? sv_collxfrm(sv1, &len1) : (char *) NULL;
6793 pv2 = sv2 ? sv_collxfrm(sv2, &len2) : (char *) NULL;
6795 if (!pv1 || !len1) {
6806 retval = memcmp((void*)pv1, (void*)pv2, len1 < len2 ? len1 : len2);
6809 return retval < 0 ? -1 : 1;
6812 * When the result of collation is equality, that doesn't mean
6813 * that there are no differences -- some locales exclude some
6814 * characters from consideration. So to avoid false equalities,
6815 * we use the raw string as a tiebreaker.
6821 #endif /* USE_LOCALE_COLLATE */
6823 return sv_cmp(sv1, sv2);
6827 #ifdef USE_LOCALE_COLLATE
6830 =for apidoc sv_collxfrm
6832 Add Collate Transform magic to an SV if it doesn't already have it.
6834 Any scalar variable may carry PERL_MAGIC_collxfrm magic that contains the
6835 scalar data of the variable, but transformed to such a format that a normal
6836 memory comparison can be used to compare the data according to the locale
6843 Perl_sv_collxfrm(pTHX_ SV *sv, STRLEN *nxp)
6847 mg = SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_collxfrm) : (MAGIC *) NULL;
6848 if (!mg || !mg->mg_ptr || *(U32*)mg->mg_ptr != PL_collation_ix) {
6853 Safefree(mg->mg_ptr);
6855 if ((xf = mem_collxfrm(s, len, &xlen))) {
6856 if (SvREADONLY(sv)) {
6859 return xf + sizeof(PL_collation_ix);
6862 sv_magic(sv, 0, PERL_MAGIC_collxfrm, 0, 0);
6863 mg = mg_find(sv, PERL_MAGIC_collxfrm);
6876 if (mg && mg->mg_ptr) {
6878 return mg->mg_ptr + sizeof(PL_collation_ix);
6886 #endif /* USE_LOCALE_COLLATE */
6891 Get a line from the filehandle and store it into the SV, optionally
6892 appending to the currently-stored string.
6898 Perl_sv_gets(pTHX_ register SV *sv, register PerlIO *fp, I32 append)
6902 register STDCHAR rslast;
6903 register STDCHAR *bp;
6909 if (SvTHINKFIRST(sv))
6910 sv_force_normal_flags(sv, append ? 0 : SV_COW_DROP_PV);
6911 /* XXX. If you make this PVIV, then copy on write can copy scalars read
6913 However, perlbench says it's slower, because the existing swipe code
6914 is faster than copy on write.
6915 Swings and roundabouts. */
6916 (void)SvUPGRADE(sv, SVt_PV);
6921 if (PerlIO_isutf8(fp)) {
6923 sv_utf8_upgrade_nomg(sv);
6924 sv_pos_u2b(sv,&append,0);
6926 } else if (SvUTF8(sv)) {
6927 SV *tsv = NEWSV(0,0);
6928 sv_gets(tsv, fp, 0);
6929 sv_utf8_upgrade_nomg(tsv);
6930 SvCUR_set(sv,append);
6933 goto return_string_or_null;
6938 if (PerlIO_isutf8(fp))
6941 if (IN_PERL_COMPILETIME) {
6942 /* we always read code in line mode */
6946 else if (RsSNARF(PL_rs)) {
6947 /* If it is a regular disk file use size from stat() as estimate
6948 of amount we are going to read - may result in malloc-ing
6949 more memory than we realy need if layers bellow reduce
6950 size we read (e.g. CRLF or a gzip layer)
6953 if (!PerlLIO_fstat(PerlIO_fileno(fp), &st) && S_ISREG(st.st_mode)) {
6954 Off_t offset = PerlIO_tell(fp);
6955 if (offset != (Off_t) -1 && st.st_size + append > offset) {
6956 (void) SvGROW(sv, (STRLEN)((st.st_size - offset) + append + 1));
6962 else if (RsRECORD(PL_rs)) {
6966 /* Grab the size of the record we're getting */
6967 recsize = SvIV(SvRV(PL_rs));
6968 buffer = SvGROW(sv, (STRLEN)(recsize + append + 1)) + append;
6971 /* VMS wants read instead of fread, because fread doesn't respect */
6972 /* RMS record boundaries. This is not necessarily a good thing to be */
6973 /* doing, but we've got no other real choice - except avoid stdio
6974 as implementation - perhaps write a :vms layer ?
6976 bytesread = PerlLIO_read(PerlIO_fileno(fp), buffer, recsize);
6978 bytesread = PerlIO_read(fp, buffer, recsize);
6982 SvCUR_set(sv, bytesread += append);
6983 buffer[bytesread] = '\0';
6984 goto return_string_or_null;
6986 else if (RsPARA(PL_rs)) {
6992 /* Get $/ i.e. PL_rs into same encoding as stream wants */
6993 if (PerlIO_isutf8(fp)) {
6994 rsptr = SvPVutf8(PL_rs, rslen);
6997 if (SvUTF8(PL_rs)) {
6998 if (!sv_utf8_downgrade(PL_rs, TRUE)) {
6999 Perl_croak(aTHX_ "Wide character in $/");
7002 rsptr = SvPV(PL_rs, rslen);
7006 rslast = rslen ? rsptr[rslen - 1] : '\0';
7008 if (rspara) { /* have to do this both before and after */
7009 do { /* to make sure file boundaries work right */
7012 i = PerlIO_getc(fp);
7016 PerlIO_ungetc(fp,i);
7022 /* See if we know enough about I/O mechanism to cheat it ! */
7024 /* This used to be #ifdef test - it is made run-time test for ease
7025 of abstracting out stdio interface. One call should be cheap
7026 enough here - and may even be a macro allowing compile
7030 if (PerlIO_fast_gets(fp)) {
7033 * We're going to steal some values from the stdio struct
7034 * and put EVERYTHING in the innermost loop into registers.
7036 register STDCHAR *ptr;
7040 #if defined(VMS) && defined(PERLIO_IS_STDIO)
7041 /* An ungetc()d char is handled separately from the regular
7042 * buffer, so we getc() it back out and stuff it in the buffer.
7044 i = PerlIO_getc(fp);
7045 if (i == EOF) return 0;
7046 *(--((*fp)->_ptr)) = (unsigned char) i;
7050 /* Here is some breathtakingly efficient cheating */
7052 cnt = PerlIO_get_cnt(fp); /* get count into register */
7053 /* make sure we have the room */
7054 if ((I32)(SvLEN(sv) - append) <= cnt + 1) {
7055 /* Not room for all of it
7056 if we are looking for a separator and room for some
7058 if (rslen && cnt > 80 && (I32)SvLEN(sv) > append) {
7059 /* just process what we have room for */
7060 shortbuffered = cnt - SvLEN(sv) + append + 1;
7061 cnt -= shortbuffered;
7065 /* remember that cnt can be negative */
7066 SvGROW(sv, (STRLEN)(append + (cnt <= 0 ? 2 : (cnt + 1))));
7071 bp = (STDCHAR*)SvPVX(sv) + append; /* move these two too to registers */
7072 ptr = (STDCHAR*)PerlIO_get_ptr(fp);
7073 DEBUG_P(PerlIO_printf(Perl_debug_log,
7074 "Screamer: entering, ptr=%"UVuf", cnt=%ld\n",PTR2UV(ptr),(long)cnt));
7075 DEBUG_P(PerlIO_printf(Perl_debug_log,
7076 "Screamer: entering: PerlIO * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
7077 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
7078 PTR2UV(PerlIO_has_base(fp) ? PerlIO_get_base(fp) : 0)));
7083 while (cnt > 0) { /* this | eat */
7085 if ((*bp++ = *ptr++) == rslast) /* really | dust */
7086 goto thats_all_folks; /* screams | sed :-) */
7090 Copy(ptr, bp, cnt, char); /* this | eat */
7091 bp += cnt; /* screams | dust */
7092 ptr += cnt; /* louder | sed :-) */
7097 if (shortbuffered) { /* oh well, must extend */
7098 cnt = shortbuffered;
7100 bpx = bp - (STDCHAR*)SvPVX(sv); /* box up before relocation */
7102 SvGROW(sv, SvLEN(sv) + append + cnt + 2);
7103 bp = (STDCHAR*)SvPVX(sv) + bpx; /* unbox after relocation */
7107 DEBUG_P(PerlIO_printf(Perl_debug_log,
7108 "Screamer: going to getc, ptr=%"UVuf", cnt=%ld\n",
7109 PTR2UV(ptr),(long)cnt));
7110 PerlIO_set_ptrcnt(fp, (STDCHAR*)ptr, cnt); /* deregisterize cnt and ptr */
7112 DEBUG_P(PerlIO_printf(Perl_debug_log,
7113 "Screamer: pre: FILE * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
7114 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
7115 PTR2UV(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0)));
7117 /* This used to call 'filbuf' in stdio form, but as that behaves like
7118 getc when cnt <= 0 we use PerlIO_getc here to avoid introducing
7119 another abstraction. */
7120 i = PerlIO_getc(fp); /* get more characters */
7122 DEBUG_P(PerlIO_printf(Perl_debug_log,
7123 "Screamer: post: FILE * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
7124 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
7125 PTR2UV(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0)));
7127 cnt = PerlIO_get_cnt(fp);
7128 ptr = (STDCHAR*)PerlIO_get_ptr(fp); /* reregisterize cnt and ptr */
7129 DEBUG_P(PerlIO_printf(Perl_debug_log,
7130 "Screamer: after getc, ptr=%"UVuf", cnt=%ld\n",PTR2UV(ptr),(long)cnt));
7132 if (i == EOF) /* all done for ever? */
7133 goto thats_really_all_folks;
7135 bpx = bp - (STDCHAR*)SvPVX(sv); /* box up before relocation */
7137 SvGROW(sv, bpx + cnt + 2);
7138 bp = (STDCHAR*)SvPVX(sv) + bpx; /* unbox after relocation */
7140 *bp++ = (STDCHAR)i; /* store character from PerlIO_getc */
7142 if (rslen && (STDCHAR)i == rslast) /* all done for now? */
7143 goto thats_all_folks;
7147 if ((rslen > 1 && (STRLEN)(bp - (STDCHAR*)SvPVX(sv)) < rslen) ||
7148 memNE((char*)bp - rslen, rsptr, rslen))
7149 goto screamer; /* go back to the fray */
7150 thats_really_all_folks:
7152 cnt += shortbuffered;
7153 DEBUG_P(PerlIO_printf(Perl_debug_log,
7154 "Screamer: quitting, ptr=%"UVuf", cnt=%ld\n",PTR2UV(ptr),(long)cnt));
7155 PerlIO_set_ptrcnt(fp, (STDCHAR*)ptr, cnt); /* put these back or we're in trouble */
7156 DEBUG_P(PerlIO_printf(Perl_debug_log,
7157 "Screamer: end: FILE * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
7158 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
7159 PTR2UV(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0)));
7161 SvCUR_set(sv, bp - (STDCHAR*)SvPVX(sv)); /* set length */
7162 DEBUG_P(PerlIO_printf(Perl_debug_log,
7163 "Screamer: done, len=%ld, string=|%.*s|\n",
7164 (long)SvCUR(sv),(int)SvCUR(sv),SvPVX(sv)));
7168 /*The big, slow, and stupid way. */
7170 /* Any stack-challenged places. */
7172 /* EPOC: need to work around SDK features. *
7173 * On WINS: MS VC5 generates calls to _chkstk, *
7174 * if a "large" stack frame is allocated. *
7175 * gcc on MARM does not generate calls like these. */
7176 # define USEHEAPINSTEADOFSTACK
7179 #ifdef USEHEAPINSTEADOFSTACK
7181 New(0, buf, 8192, STDCHAR);
7189 register STDCHAR *bpe = buf + sizeof(buf);
7191 while ((i = PerlIO_getc(fp)) != EOF && (*bp++ = (STDCHAR)i) != rslast && bp < bpe)
7192 ; /* keep reading */
7196 cnt = PerlIO_read(fp,(char*)buf, sizeof(buf));
7197 /* Accomodate broken VAXC compiler, which applies U8 cast to
7198 * both args of ?: operator, causing EOF to change into 255
7201 i = (U8)buf[cnt - 1];
7207 cnt = 0; /* we do need to re-set the sv even when cnt <= 0 */
7209 sv_catpvn(sv, (char *) buf, cnt);
7211 sv_setpvn(sv, (char *) buf, cnt);
7213 if (i != EOF && /* joy */
7215 SvCUR(sv) < rslen ||
7216 memNE(SvPVX(sv) + SvCUR(sv) - rslen, rsptr, rslen)))
7220 * If we're reading from a TTY and we get a short read,
7221 * indicating that the user hit his EOF character, we need
7222 * to notice it now, because if we try to read from the TTY
7223 * again, the EOF condition will disappear.
7225 * The comparison of cnt to sizeof(buf) is an optimization
7226 * that prevents unnecessary calls to feof().
7230 if (!(cnt < sizeof(buf) && PerlIO_eof(fp)))
7234 #ifdef USEHEAPINSTEADOFSTACK
7239 if (rspara) { /* have to do this both before and after */
7240 while (i != EOF) { /* to make sure file boundaries work right */
7241 i = PerlIO_getc(fp);
7243 PerlIO_ungetc(fp,i);
7249 return_string_or_null:
7250 return (SvCUR(sv) - append) ? SvPVX(sv) : Nullch;
7256 Auto-increment of the value in the SV, doing string to numeric conversion
7257 if necessary. Handles 'get' magic.
7263 Perl_sv_inc(pTHX_ register SV *sv)
7272 if (SvTHINKFIRST(sv)) {
7274 sv_force_normal_flags(sv, 0);
7275 if (SvREADONLY(sv)) {
7276 if (IN_PERL_RUNTIME)
7277 Perl_croak(aTHX_ PL_no_modify);
7281 if (SvAMAGIC(sv) && AMG_CALLun(sv,inc))
7283 i = PTR2IV(SvRV(sv));
7288 flags = SvFLAGS(sv);
7289 if ((flags & (SVp_NOK|SVp_IOK)) == SVp_NOK) {
7290 /* It's (privately or publicly) a float, but not tested as an
7291 integer, so test it to see. */
7293 flags = SvFLAGS(sv);
7295 if ((flags & SVf_IOK) || ((flags & (SVp_IOK | SVp_NOK)) == SVp_IOK)) {
7296 /* It's publicly an integer, or privately an integer-not-float */
7297 #ifdef PERL_PRESERVE_IVUV
7301 if (SvUVX(sv) == UV_MAX)
7302 sv_setnv(sv, UV_MAX_P1);
7304 (void)SvIOK_only_UV(sv);
7307 if (SvIVX(sv) == IV_MAX)
7308 sv_setuv(sv, (UV)IV_MAX + 1);
7310 (void)SvIOK_only(sv);
7316 if (flags & SVp_NOK) {
7317 (void)SvNOK_only(sv);
7322 if (!(flags & SVp_POK) || !*SvPVX(sv)) {
7323 if ((flags & SVTYPEMASK) < SVt_PVIV)
7324 sv_upgrade(sv, SVt_IV);
7325 (void)SvIOK_only(sv);
7330 while (isALPHA(*d)) d++;
7331 while (isDIGIT(*d)) d++;
7333 #ifdef PERL_PRESERVE_IVUV
7334 /* Got to punt this as an integer if needs be, but we don't issue
7335 warnings. Probably ought to make the sv_iv_please() that does
7336 the conversion if possible, and silently. */
7337 int numtype = grok_number(SvPVX(sv), SvCUR(sv), NULL);
7338 if (numtype && !(numtype & IS_NUMBER_INFINITY)) {
7339 /* Need to try really hard to see if it's an integer.
7340 9.22337203685478e+18 is an integer.
7341 but "9.22337203685478e+18" + 0 is UV=9223372036854779904
7342 so $a="9.22337203685478e+18"; $a+0; $a++
7343 needs to be the same as $a="9.22337203685478e+18"; $a++
7350 /* sv_2iv *should* have made this an NV */
7351 if (flags & SVp_NOK) {
7352 (void)SvNOK_only(sv);
7356 /* I don't think we can get here. Maybe I should assert this
7357 And if we do get here I suspect that sv_setnv will croak. NWC
7359 #if defined(USE_LONG_DOUBLE)
7360 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",
7361 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
7363 DEBUG_c(PerlIO_printf(Perl_debug_log,"sv_inc punt failed to convert '%s' to IOK or NOKp, UV=0x%"UVxf" NV=%"NVgf"\n",
7364 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
7367 #endif /* PERL_PRESERVE_IVUV */
7368 sv_setnv(sv,Atof(SvPVX(sv)) + 1.0);
7372 while (d >= SvPVX(sv)) {
7380 /* MKS: The original code here died if letters weren't consecutive.
7381 * at least it didn't have to worry about non-C locales. The
7382 * new code assumes that ('z'-'a')==('Z'-'A'), letters are
7383 * arranged in order (although not consecutively) and that only
7384 * [A-Za-z] are accepted by isALPHA in the C locale.
7386 if (*d != 'z' && *d != 'Z') {
7387 do { ++*d; } while (!isALPHA(*d));
7390 *(d--) -= 'z' - 'a';
7395 *(d--) -= 'z' - 'a' + 1;
7399 /* oh,oh, the number grew */
7400 SvGROW(sv, SvCUR(sv) + 2);
7402 for (d = SvPVX(sv) + SvCUR(sv); d > SvPVX(sv); d--)
7413 Auto-decrement of the value in the SV, doing string to numeric conversion
7414 if necessary. Handles 'get' magic.
7420 Perl_sv_dec(pTHX_ register SV *sv)
7428 if (SvTHINKFIRST(sv)) {
7430 sv_force_normal_flags(sv, 0);
7431 if (SvREADONLY(sv)) {
7432 if (IN_PERL_RUNTIME)
7433 Perl_croak(aTHX_ PL_no_modify);
7437 if (SvAMAGIC(sv) && AMG_CALLun(sv,dec))
7439 i = PTR2IV(SvRV(sv));
7444 /* Unlike sv_inc we don't have to worry about string-never-numbers
7445 and keeping them magic. But we mustn't warn on punting */
7446 flags = SvFLAGS(sv);
7447 if ((flags & SVf_IOK) || ((flags & (SVp_IOK | SVp_NOK)) == SVp_IOK)) {
7448 /* It's publicly an integer, or privately an integer-not-float */
7449 #ifdef PERL_PRESERVE_IVUV
7453 if (SvUVX(sv) == 0) {
7454 (void)SvIOK_only(sv);
7458 (void)SvIOK_only_UV(sv);
7462 if (SvIVX(sv) == IV_MIN)
7463 sv_setnv(sv, (NV)IV_MIN - 1.0);
7465 (void)SvIOK_only(sv);
7471 if (flags & SVp_NOK) {
7473 (void)SvNOK_only(sv);
7476 if (!(flags & SVp_POK)) {
7477 if ((flags & SVTYPEMASK) < SVt_PVNV)
7478 sv_upgrade(sv, SVt_NV);
7480 (void)SvNOK_only(sv);
7483 #ifdef PERL_PRESERVE_IVUV
7485 int numtype = grok_number(SvPVX(sv), SvCUR(sv), NULL);
7486 if (numtype && !(numtype & IS_NUMBER_INFINITY)) {
7487 /* Need to try really hard to see if it's an integer.
7488 9.22337203685478e+18 is an integer.
7489 but "9.22337203685478e+18" + 0 is UV=9223372036854779904
7490 so $a="9.22337203685478e+18"; $a+0; $a--
7491 needs to be the same as $a="9.22337203685478e+18"; $a--
7498 /* sv_2iv *should* have made this an NV */
7499 if (flags & SVp_NOK) {
7500 (void)SvNOK_only(sv);
7504 /* I don't think we can get here. Maybe I should assert this
7505 And if we do get here I suspect that sv_setnv will croak. NWC
7507 #if defined(USE_LONG_DOUBLE)
7508 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",
7509 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
7511 DEBUG_c(PerlIO_printf(Perl_debug_log,"sv_dec punt failed to convert '%s' to IOK or NOKp, UV=0x%"UVxf" NV=%"NVgf"\n",
7512 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
7516 #endif /* PERL_PRESERVE_IVUV */
7517 sv_setnv(sv,Atof(SvPVX(sv)) - 1.0); /* punt */
7521 =for apidoc sv_mortalcopy
7523 Creates a new SV which is a copy of the original SV (using C<sv_setsv>).
7524 The new SV is marked as mortal. It will be destroyed "soon", either by an
7525 explicit call to FREETMPS, or by an implicit call at places such as
7526 statement boundaries. See also C<sv_newmortal> and C<sv_2mortal>.
7531 /* Make a string that will exist for the duration of the expression
7532 * evaluation. Actually, it may have to last longer than that, but
7533 * hopefully we won't free it until it has been assigned to a
7534 * permanent location. */
7537 Perl_sv_mortalcopy(pTHX_ SV *oldstr)
7542 sv_setsv(sv,oldstr);
7544 PL_tmps_stack[++PL_tmps_ix] = sv;
7550 =for apidoc sv_newmortal
7552 Creates a new null SV which is mortal. The reference count of the SV is
7553 set to 1. It will be destroyed "soon", either by an explicit call to
7554 FREETMPS, or by an implicit call at places such as statement boundaries.
7555 See also C<sv_mortalcopy> and C<sv_2mortal>.
7561 Perl_sv_newmortal(pTHX)
7566 SvFLAGS(sv) = SVs_TEMP;
7568 PL_tmps_stack[++PL_tmps_ix] = sv;
7573 =for apidoc sv_2mortal
7575 Marks an existing SV as mortal. The SV will be destroyed "soon", either
7576 by an explicit call to FREETMPS, or by an implicit call at places such as
7577 statement boundaries. SvTEMP() is turned on which means that the SV's
7578 string buffer can be "stolen" if this SV is copied. See also C<sv_newmortal>
7579 and C<sv_mortalcopy>.
7585 Perl_sv_2mortal(pTHX_ register SV *sv)
7589 if (SvREADONLY(sv) && SvIMMORTAL(sv))
7592 PL_tmps_stack[++PL_tmps_ix] = sv;
7600 Creates a new SV and copies a string into it. The reference count for the
7601 SV is set to 1. If C<len> is zero, Perl will compute the length using
7602 strlen(). For efficiency, consider using C<newSVpvn> instead.
7608 Perl_newSVpv(pTHX_ const char *s, STRLEN len)
7615 sv_setpvn(sv,s,len);
7620 =for apidoc newSVpvn
7622 Creates a new SV and copies a string into it. The reference count for the
7623 SV is set to 1. Note that if C<len> is zero, Perl will create a zero length
7624 string. You are responsible for ensuring that the source string is at least
7625 C<len> bytes long. If the C<s> argument is NULL the new SV will be undefined.
7631 Perl_newSVpvn(pTHX_ const char *s, STRLEN len)
7636 sv_setpvn(sv,s,len);
7641 =for apidoc newSVpvn_share
7643 Creates a new SV with its SvPVX pointing to a shared string in the string
7644 table. If the string does not already exist in the table, it is created
7645 first. Turns on READONLY and FAKE. The string's hash is stored in the UV
7646 slot of the SV; if the C<hash> parameter is non-zero, that value is used;
7647 otherwise the hash is computed. The idea here is that as the string table
7648 is used for shared hash keys these strings will have SvPVX == HeKEY and
7649 hash lookup will avoid string compare.
7655 Perl_newSVpvn_share(pTHX_ const char *src, I32 len, U32 hash)
7658 bool is_utf8 = FALSE;
7660 STRLEN tmplen = -len;
7662 /* See the note in hv.c:hv_fetch() --jhi */
7663 src = (char*)bytes_from_utf8((U8*)src, &tmplen, &is_utf8);
7667 PERL_HASH(hash, src, len);
7669 sv_upgrade(sv, SVt_PVIV);
7670 SvPVX(sv) = sharepvn(src, is_utf8?-len:len, hash);
7683 #if defined(PERL_IMPLICIT_CONTEXT)
7685 /* pTHX_ magic can't cope with varargs, so this is a no-context
7686 * version of the main function, (which may itself be aliased to us).
7687 * Don't access this version directly.
7691 Perl_newSVpvf_nocontext(const char* pat, ...)
7696 va_start(args, pat);
7697 sv = vnewSVpvf(pat, &args);
7704 =for apidoc newSVpvf
7706 Creates a new SV and initializes it with the string formatted like
7713 Perl_newSVpvf(pTHX_ const char* pat, ...)
7717 va_start(args, pat);
7718 sv = vnewSVpvf(pat, &args);
7723 /* backend for newSVpvf() and newSVpvf_nocontext() */
7726 Perl_vnewSVpvf(pTHX_ const char* pat, va_list* args)
7730 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
7737 Creates a new SV and copies a floating point value into it.
7738 The reference count for the SV is set to 1.
7744 Perl_newSVnv(pTHX_ NV n)
7756 Creates a new SV and copies an integer into it. The reference count for the
7763 Perl_newSViv(pTHX_ IV i)
7775 Creates a new SV and copies an unsigned integer into it.
7776 The reference count for the SV is set to 1.
7782 Perl_newSVuv(pTHX_ UV u)
7792 =for apidoc newRV_noinc
7794 Creates an RV wrapper for an SV. The reference count for the original
7795 SV is B<not> incremented.
7801 Perl_newRV_noinc(pTHX_ SV *tmpRef)
7806 sv_upgrade(sv, SVt_RV);
7813 /* newRV_inc is the official function name to use now.
7814 * newRV_inc is in fact #defined to newRV in sv.h
7818 Perl_newRV(pTHX_ SV *tmpRef)
7820 return newRV_noinc(SvREFCNT_inc(tmpRef));
7826 Creates a new SV which is an exact duplicate of the original SV.
7833 Perl_newSVsv(pTHX_ register SV *old)
7839 if (SvTYPE(old) == SVTYPEMASK) {
7840 if (ckWARN_d(WARN_INTERNAL))
7841 Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "semi-panic: attempt to dup freed string");
7856 =for apidoc sv_reset
7858 Underlying implementation for the C<reset> Perl function.
7859 Note that the perl-level function is vaguely deprecated.
7865 Perl_sv_reset(pTHX_ register char *s, HV *stash)
7873 char todo[PERL_UCHAR_MAX+1];
7878 if (!*s) { /* reset ?? searches */
7879 for (pm = HvPMROOT(stash); pm; pm = pm->op_pmnext) {
7880 pm->op_pmdynflags &= ~PMdf_USED;
7885 /* reset variables */
7887 if (!HvARRAY(stash))
7890 Zero(todo, 256, char);
7892 i = (unsigned char)*s;
7896 max = (unsigned char)*s++;
7897 for ( ; i <= max; i++) {
7900 for (i = 0; i <= (I32) HvMAX(stash); i++) {
7901 for (entry = HvARRAY(stash)[i];
7903 entry = HeNEXT(entry))
7905 if (!todo[(U8)*HeKEY(entry)])
7907 gv = (GV*)HeVAL(entry);
7909 if (SvTHINKFIRST(sv)) {
7910 if (!SvREADONLY(sv) && SvROK(sv))
7915 if (SvTYPE(sv) >= SVt_PV) {
7917 if (SvPVX(sv) != Nullch)
7924 if (GvHV(gv) && !HvNAME(GvHV(gv))) {
7927 #ifdef USE_ENVIRON_ARRAY
7929 # ifdef USE_ITHREADS
7930 && PL_curinterp == aTHX
7934 environ[0] = Nullch;
7937 #endif /* !PERL_MICRO */
7947 Using various gambits, try to get an IO from an SV: the IO slot if its a
7948 GV; or the recursive result if we're an RV; or the IO slot of the symbol
7949 named after the PV if we're a string.
7955 Perl_sv_2io(pTHX_ SV *sv)
7961 switch (SvTYPE(sv)) {
7969 Perl_croak(aTHX_ "Bad filehandle: %s", GvNAME(gv));
7973 Perl_croak(aTHX_ PL_no_usym, "filehandle");
7975 return sv_2io(SvRV(sv));
7976 gv = gv_fetchpv(SvPV(sv,n_a), FALSE, SVt_PVIO);
7982 Perl_croak(aTHX_ "Bad filehandle: %"SVf, sv);
7991 Using various gambits, try to get a CV from an SV; in addition, try if
7992 possible to set C<*st> and C<*gvp> to the stash and GV associated with it.
7998 Perl_sv_2cv(pTHX_ SV *sv, HV **st, GV **gvp, I32 lref)
8005 return *gvp = Nullgv, Nullcv;
8006 switch (SvTYPE(sv)) {
8025 SV **sp = &sv; /* Used in tryAMAGICunDEREF macro. */
8026 tryAMAGICunDEREF(to_cv);
8029 if (SvTYPE(sv) == SVt_PVCV) {
8038 Perl_croak(aTHX_ "Not a subroutine reference");
8043 gv = gv_fetchpv(SvPV(sv, n_a), lref, SVt_PVCV);
8049 if (lref && !GvCVu(gv)) {
8052 tmpsv = NEWSV(704,0);
8053 gv_efullname3(tmpsv, gv, Nullch);
8054 /* XXX this is probably not what they think they're getting.
8055 * It has the same effect as "sub name;", i.e. just a forward
8057 newSUB(start_subparse(FALSE, 0),
8058 newSVOP(OP_CONST, 0, tmpsv),
8063 Perl_croak(aTHX_ "Unable to create sub named \"%"SVf"\"",
8073 Returns true if the SV has a true value by Perl's rules.
8074 Use the C<SvTRUE> macro instead, which may call C<sv_true()> or may
8075 instead use an in-line version.
8081 Perl_sv_true(pTHX_ register SV *sv)
8087 if ((tXpv = (XPV*)SvANY(sv)) &&
8088 (tXpv->xpv_cur > 1 ||
8089 (tXpv->xpv_cur && *tXpv->xpv_pv != '0')))
8096 return SvIVX(sv) != 0;
8099 return SvNVX(sv) != 0.0;
8101 return sv_2bool(sv);
8109 A private implementation of the C<SvIVx> macro for compilers which can't
8110 cope with complex macro expressions. Always use the macro instead.
8116 Perl_sv_iv(pTHX_ register SV *sv)
8120 return (IV)SvUVX(sv);
8129 A private implementation of the C<SvUVx> macro for compilers which can't
8130 cope with complex macro expressions. Always use the macro instead.
8136 Perl_sv_uv(pTHX_ register SV *sv)
8141 return (UV)SvIVX(sv);
8149 A private implementation of the C<SvNVx> macro for compilers which can't
8150 cope with complex macro expressions. Always use the macro instead.
8156 Perl_sv_nv(pTHX_ register SV *sv)
8163 /* sv_pv() is now a macro using SvPV_nolen();
8164 * this function provided for binary compatibility only
8168 Perl_sv_pv(pTHX_ SV *sv)
8175 return sv_2pv(sv, &n_a);
8181 Use the C<SvPV_nolen> macro instead
8185 A private implementation of the C<SvPV> macro for compilers which can't
8186 cope with complex macro expressions. Always use the macro instead.
8192 Perl_sv_pvn(pTHX_ SV *sv, STRLEN *lp)
8198 return sv_2pv(sv, lp);
8203 Perl_sv_pvn_nomg(pTHX_ register SV *sv, STRLEN *lp)
8209 return sv_2pv_flags(sv, lp, 0);
8212 /* sv_pvn_force() is now a macro using Perl_sv_pvn_force_flags();
8213 * this function provided for binary compatibility only
8217 Perl_sv_pvn_force(pTHX_ SV *sv, STRLEN *lp)
8219 return sv_pvn_force_flags(sv, lp, SV_GMAGIC);
8223 =for apidoc sv_pvn_force
8225 Get a sensible string out of the SV somehow.
8226 A private implementation of the C<SvPV_force> macro for compilers which
8227 can't cope with complex macro expressions. Always use the macro instead.
8229 =for apidoc sv_pvn_force_flags
8231 Get a sensible string out of the SV somehow.
8232 If C<flags> has C<SV_GMAGIC> bit set, will C<mg_get> on C<sv> if
8233 appropriate, else not. C<sv_pvn_force> and C<sv_pvn_force_nomg> are
8234 implemented in terms of this function.
8235 You normally want to use the various wrapper macros instead: see
8236 C<SvPV_force> and C<SvPV_force_nomg>
8242 Perl_sv_pvn_force_flags(pTHX_ SV *sv, STRLEN *lp, I32 flags)
8246 if (SvTHINKFIRST(sv) && !SvROK(sv))
8247 sv_force_normal_flags(sv, 0);
8253 if (SvTYPE(sv) > SVt_PVLV && SvTYPE(sv) != SVt_PVFM) {
8254 Perl_croak(aTHX_ "Can't coerce %s to string in %s", sv_reftype(sv,0),
8258 s = sv_2pv_flags(sv, lp, flags);
8259 if (s != SvPVX(sv)) { /* Almost, but not quite, sv_setpvn() */
8264 (void)SvUPGRADE(sv, SVt_PV); /* Never FALSE */
8265 SvGROW(sv, len + 1);
8266 Move(s,SvPVX(sv),len,char);
8271 SvPOK_on(sv); /* validate pointer */
8273 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2pv(%s)\n",
8274 PTR2UV(sv),SvPVX(sv)));
8280 /* sv_pvbyte () is now a macro using Perl_sv_2pv_flags();
8281 * this function provided for binary compatibility only
8285 Perl_sv_pvbyte(pTHX_ SV *sv)
8287 sv_utf8_downgrade(sv,0);
8292 =for apidoc sv_pvbyte
8294 Use C<SvPVbyte_nolen> instead.
8296 =for apidoc sv_pvbyten
8298 A private implementation of the C<SvPVbyte> macro for compilers
8299 which can't cope with complex macro expressions. Always use the macro
8306 Perl_sv_pvbyten(pTHX_ SV *sv, STRLEN *lp)
8308 sv_utf8_downgrade(sv,0);
8309 return sv_pvn(sv,lp);
8313 =for apidoc sv_pvbyten_force
8315 A private implementation of the C<SvPVbytex_force> macro for compilers
8316 which can't cope with complex macro expressions. Always use the macro
8323 Perl_sv_pvbyten_force(pTHX_ SV *sv, STRLEN *lp)
8325 sv_pvn_force(sv,lp);
8326 sv_utf8_downgrade(sv,0);
8331 /* sv_pvutf8 () is now a macro using Perl_sv_2pv_flags();
8332 * this function provided for binary compatibility only
8336 Perl_sv_pvutf8(pTHX_ SV *sv)
8338 sv_utf8_upgrade(sv);
8343 =for apidoc sv_pvutf8
8345 Use the C<SvPVutf8_nolen> macro instead
8347 =for apidoc sv_pvutf8n
8349 A private implementation of the C<SvPVutf8> macro for compilers
8350 which can't cope with complex macro expressions. Always use the macro
8357 Perl_sv_pvutf8n(pTHX_ SV *sv, STRLEN *lp)
8359 sv_utf8_upgrade(sv);
8360 return sv_pvn(sv,lp);
8364 =for apidoc sv_pvutf8n_force
8366 A private implementation of the C<SvPVutf8_force> macro for compilers
8367 which can't cope with complex macro expressions. Always use the macro
8374 Perl_sv_pvutf8n_force(pTHX_ SV *sv, STRLEN *lp)
8376 sv_pvn_force(sv,lp);
8377 sv_utf8_upgrade(sv);
8383 =for apidoc sv_reftype
8385 Returns a string describing what the SV is a reference to.
8391 Perl_sv_reftype(pTHX_ SV *sv, int ob)
8393 if (ob && SvOBJECT(sv)) {
8394 if (HvNAME(SvSTASH(sv)))
8395 return HvNAME(SvSTASH(sv));
8400 switch (SvTYPE(sv)) {
8417 case SVt_PVLV: return SvROK(sv) ? "REF"
8418 /* tied lvalues should appear to be
8419 * scalars for backwards compatitbility */
8420 : (LvTYPE(sv) == 't' || LvTYPE(sv) == 'T')
8421 ? "SCALAR" : "LVALUE";
8422 case SVt_PVAV: return "ARRAY";
8423 case SVt_PVHV: return "HASH";
8424 case SVt_PVCV: return "CODE";
8425 case SVt_PVGV: return "GLOB";
8426 case SVt_PVFM: return "FORMAT";
8427 case SVt_PVIO: return "IO";
8428 default: return "UNKNOWN";
8434 =for apidoc sv_isobject
8436 Returns a boolean indicating whether the SV is an RV pointing to a blessed
8437 object. If the SV is not an RV, or if the object is not blessed, then this
8444 Perl_sv_isobject(pTHX_ SV *sv)
8461 Returns a boolean indicating whether the SV is blessed into the specified
8462 class. This does not check for subtypes; use C<sv_derived_from> to verify
8463 an inheritance relationship.
8469 Perl_sv_isa(pTHX_ SV *sv, const char *name)
8480 if (!HvNAME(SvSTASH(sv)))
8483 return strEQ(HvNAME(SvSTASH(sv)), name);
8489 Creates a new SV for the RV, C<rv>, to point to. If C<rv> is not an RV then
8490 it will be upgraded to one. If C<classname> is non-null then the new SV will
8491 be blessed in the specified package. The new SV is returned and its
8492 reference count is 1.
8498 Perl_newSVrv(pTHX_ SV *rv, const char *classname)
8504 SV_CHECK_THINKFIRST_COW_DROP(rv);
8507 if (SvTYPE(rv) >= SVt_PVMG) {
8508 U32 refcnt = SvREFCNT(rv);
8512 SvREFCNT(rv) = refcnt;
8515 if (SvTYPE(rv) < SVt_RV)
8516 sv_upgrade(rv, SVt_RV);
8517 else if (SvTYPE(rv) > SVt_RV) {
8518 (void)SvOOK_off(rv);
8519 if (SvPVX(rv) && SvLEN(rv))
8520 Safefree(SvPVX(rv));
8530 HV* stash = gv_stashpv(classname, TRUE);
8531 (void)sv_bless(rv, stash);
8537 =for apidoc sv_setref_pv
8539 Copies a pointer into a new SV, optionally blessing the SV. The C<rv>
8540 argument will be upgraded to an RV. That RV will be modified to point to
8541 the new SV. If the C<pv> argument is NULL then C<PL_sv_undef> will be placed
8542 into the SV. The C<classname> argument indicates the package for the
8543 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
8544 will have a reference count of 1, and the RV will be returned.
8546 Do not use with other Perl types such as HV, AV, SV, CV, because those
8547 objects will become corrupted by the pointer copy process.
8549 Note that C<sv_setref_pvn> copies the string while this copies the pointer.
8555 Perl_sv_setref_pv(pTHX_ SV *rv, const char *classname, void *pv)
8558 sv_setsv(rv, &PL_sv_undef);
8562 sv_setiv(newSVrv(rv,classname), PTR2IV(pv));
8567 =for apidoc sv_setref_iv
8569 Copies an integer into a new SV, optionally blessing the SV. The C<rv>
8570 argument will be upgraded to an RV. That RV will be modified to point to
8571 the new SV. The C<classname> argument indicates the package for the
8572 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
8573 will have a reference count of 1, and the RV will be returned.
8579 Perl_sv_setref_iv(pTHX_ SV *rv, const char *classname, IV iv)
8581 sv_setiv(newSVrv(rv,classname), iv);
8586 =for apidoc sv_setref_uv
8588 Copies an unsigned integer into a new SV, optionally blessing the SV. The C<rv>
8589 argument will be upgraded to an RV. That RV will be modified to point to
8590 the new SV. The C<classname> argument indicates the package for the
8591 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
8592 will have a reference count of 1, and the RV will be returned.
8598 Perl_sv_setref_uv(pTHX_ SV *rv, const char *classname, UV uv)
8600 sv_setuv(newSVrv(rv,classname), uv);
8605 =for apidoc sv_setref_nv
8607 Copies a double into a new SV, optionally blessing the SV. The C<rv>
8608 argument will be upgraded to an RV. That RV will be modified to point to
8609 the new SV. The C<classname> argument indicates the package for the
8610 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
8611 will have a reference count of 1, and the RV will be returned.
8617 Perl_sv_setref_nv(pTHX_ SV *rv, const char *classname, NV nv)
8619 sv_setnv(newSVrv(rv,classname), nv);
8624 =for apidoc sv_setref_pvn
8626 Copies a string into a new SV, optionally blessing the SV. The length of the
8627 string must be specified with C<n>. The C<rv> argument will be upgraded to
8628 an RV. That RV will be modified to point to the new SV. The C<classname>
8629 argument indicates the package for the blessing. Set C<classname> to
8630 C<Nullch> to avoid the blessing. The new SV will have a reference count
8631 of 1, and the RV will be returned.
8633 Note that C<sv_setref_pv> copies the pointer while this copies the string.
8639 Perl_sv_setref_pvn(pTHX_ SV *rv, const char *classname, char *pv, STRLEN n)
8641 sv_setpvn(newSVrv(rv,classname), pv, n);
8646 =for apidoc sv_bless
8648 Blesses an SV into a specified package. The SV must be an RV. The package
8649 must be designated by its stash (see C<gv_stashpv()>). The reference count
8650 of the SV is unaffected.
8656 Perl_sv_bless(pTHX_ SV *sv, HV *stash)
8660 Perl_croak(aTHX_ "Can't bless non-reference value");
8662 if (SvFLAGS(tmpRef) & (SVs_OBJECT|SVf_READONLY)) {
8663 if (SvREADONLY(tmpRef))
8664 Perl_croak(aTHX_ PL_no_modify);
8665 if (SvOBJECT(tmpRef)) {
8666 if (SvTYPE(tmpRef) != SVt_PVIO)
8668 SvREFCNT_dec(SvSTASH(tmpRef));
8671 SvOBJECT_on(tmpRef);
8672 if (SvTYPE(tmpRef) != SVt_PVIO)
8674 (void)SvUPGRADE(tmpRef, SVt_PVMG);
8675 SvSTASH(tmpRef) = (HV*)SvREFCNT_inc(stash);
8682 if(SvSMAGICAL(tmpRef))
8683 if(mg_find(tmpRef, PERL_MAGIC_ext) || mg_find(tmpRef, PERL_MAGIC_uvar))
8691 /* Downgrades a PVGV to a PVMG.
8695 S_sv_unglob(pTHX_ SV *sv)
8699 assert(SvTYPE(sv) == SVt_PVGV);
8704 SvREFCNT_dec(GvSTASH(sv));
8705 GvSTASH(sv) = Nullhv;
8707 sv_unmagic(sv, PERL_MAGIC_glob);
8708 Safefree(GvNAME(sv));
8711 /* need to keep SvANY(sv) in the right arena */
8712 xpvmg = new_XPVMG();
8713 StructCopy(SvANY(sv), xpvmg, XPVMG);
8714 del_XPVGV(SvANY(sv));
8717 SvFLAGS(sv) &= ~SVTYPEMASK;
8718 SvFLAGS(sv) |= SVt_PVMG;
8722 =for apidoc sv_unref_flags
8724 Unsets the RV status of the SV, and decrements the reference count of
8725 whatever was being referenced by the RV. This can almost be thought of
8726 as a reversal of C<newSVrv>. The C<cflags> argument can contain
8727 C<SV_IMMEDIATE_UNREF> to force the reference count to be decremented
8728 (otherwise the decrementing is conditional on the reference count being
8729 different from one or the reference being a readonly SV).
8736 Perl_sv_unref_flags(pTHX_ SV *sv, U32 flags)
8740 if (SvWEAKREF(sv)) {
8748 /* You can't have a || SvREADONLY(rv) here, as $a = $$a, where $a was
8749 assigned to as BEGIN {$a = \"Foo"} will fail. */
8750 if (SvREFCNT(rv) != 1 || (flags & SV_IMMEDIATE_UNREF))
8752 else /* XXX Hack, but hard to make $a=$a->[1] work otherwise */
8753 sv_2mortal(rv); /* Schedule for freeing later */
8757 =for apidoc sv_unref
8759 Unsets the RV status of the SV, and decrements the reference count of
8760 whatever was being referenced by the RV. This can almost be thought of
8761 as a reversal of C<newSVrv>. This is C<sv_unref_flags> with the C<flag>
8762 being zero. See C<SvROK_off>.
8768 Perl_sv_unref(pTHX_ SV *sv)
8770 sv_unref_flags(sv, 0);
8774 =for apidoc sv_taint
8776 Taint an SV. Use C<SvTAINTED_on> instead.
8781 Perl_sv_taint(pTHX_ SV *sv)
8783 sv_magic((sv), Nullsv, PERL_MAGIC_taint, Nullch, 0);
8787 =for apidoc sv_untaint
8789 Untaint an SV. Use C<SvTAINTED_off> instead.
8794 Perl_sv_untaint(pTHX_ SV *sv)
8796 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) {
8797 MAGIC *mg = mg_find(sv, PERL_MAGIC_taint);
8804 =for apidoc sv_tainted
8806 Test an SV for taintedness. Use C<SvTAINTED> instead.
8811 Perl_sv_tainted(pTHX_ SV *sv)
8813 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) {
8814 MAGIC *mg = mg_find(sv, PERL_MAGIC_taint);
8815 if (mg && ((mg->mg_len & 1) || ((mg->mg_len & 2) && mg->mg_obj == sv)))
8822 =for apidoc sv_setpviv
8824 Copies an integer into the given SV, also updating its string value.
8825 Does not handle 'set' magic. See C<sv_setpviv_mg>.
8831 Perl_sv_setpviv(pTHX_ SV *sv, IV iv)
8833 char buf[TYPE_CHARS(UV)];
8835 char *ptr = uiv_2buf(buf, iv, 0, 0, &ebuf);
8837 sv_setpvn(sv, ptr, ebuf - ptr);
8841 =for apidoc sv_setpviv_mg
8843 Like C<sv_setpviv>, but also handles 'set' magic.
8849 Perl_sv_setpviv_mg(pTHX_ SV *sv, IV iv)
8851 char buf[TYPE_CHARS(UV)];
8853 char *ptr = uiv_2buf(buf, iv, 0, 0, &ebuf);
8855 sv_setpvn(sv, ptr, ebuf - ptr);
8859 #if defined(PERL_IMPLICIT_CONTEXT)
8861 /* pTHX_ magic can't cope with varargs, so this is a no-context
8862 * version of the main function, (which may itself be aliased to us).
8863 * Don't access this version directly.
8867 Perl_sv_setpvf_nocontext(SV *sv, const char* pat, ...)
8871 va_start(args, pat);
8872 sv_vsetpvf(sv, pat, &args);
8876 /* pTHX_ magic can't cope with varargs, so this is a no-context
8877 * version of the main function, (which may itself be aliased to us).
8878 * Don't access this version directly.
8882 Perl_sv_setpvf_mg_nocontext(SV *sv, const char* pat, ...)
8886 va_start(args, pat);
8887 sv_vsetpvf_mg(sv, pat, &args);
8893 =for apidoc sv_setpvf
8895 Processes its arguments like C<sprintf> and sets an SV to the formatted
8896 output. Does not handle 'set' magic. See C<sv_setpvf_mg>.
8902 Perl_sv_setpvf(pTHX_ SV *sv, const char* pat, ...)
8905 va_start(args, pat);
8906 sv_vsetpvf(sv, pat, &args);
8910 /* backend for C<sv_setpvf> and C<sv_setpvf_nocontext> */
8913 Perl_sv_vsetpvf(pTHX_ SV *sv, const char* pat, va_list* args)
8915 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
8919 =for apidoc sv_setpvf_mg
8921 Like C<sv_setpvf>, but also handles 'set' magic.
8927 Perl_sv_setpvf_mg(pTHX_ SV *sv, const char* pat, ...)
8930 va_start(args, pat);
8931 sv_vsetpvf_mg(sv, pat, &args);
8935 /* backend for C<sv_setpvf_mg> C<setpvf_mg_nocontext> */
8938 Perl_sv_vsetpvf_mg(pTHX_ SV *sv, const char* pat, va_list* args)
8940 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
8944 #if defined(PERL_IMPLICIT_CONTEXT)
8946 /* pTHX_ magic can't cope with varargs, so this is a no-context
8947 * version of the main function, (which may itself be aliased to us).
8948 * Don't access this version directly.
8952 Perl_sv_catpvf_nocontext(SV *sv, const char* pat, ...)
8956 va_start(args, pat);
8957 sv_vcatpvf(sv, pat, &args);
8961 /* pTHX_ magic can't cope with varargs, so this is a no-context
8962 * version of the main function, (which may itself be aliased to us).
8963 * Don't access this version directly.
8967 Perl_sv_catpvf_mg_nocontext(SV *sv, const char* pat, ...)
8971 va_start(args, pat);
8972 sv_vcatpvf_mg(sv, pat, &args);
8978 =for apidoc sv_catpvf
8980 Processes its arguments like C<sprintf> and appends the formatted
8981 output to an SV. If the appended data contains "wide" characters
8982 (including, but not limited to, SVs with a UTF-8 PV formatted with %s,
8983 and characters >255 formatted with %c), the original SV might get
8984 upgraded to UTF-8. Handles 'get' magic, but not 'set' magic.
8985 C<SvSETMAGIC()> must typically be called after calling this function
8986 to handle 'set' magic.
8991 Perl_sv_catpvf(pTHX_ SV *sv, const char* pat, ...)
8994 va_start(args, pat);
8995 sv_vcatpvf(sv, pat, &args);
8999 /* backend for C<sv_catpvf> and C<catpvf_mg_nocontext> */
9002 Perl_sv_vcatpvf(pTHX_ SV *sv, const char* pat, va_list* args)
9004 sv_vcatpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
9008 =for apidoc sv_catpvf_mg
9010 Like C<sv_catpvf>, but also handles 'set' magic.
9016 Perl_sv_catpvf_mg(pTHX_ SV *sv, const char* pat, ...)
9019 va_start(args, pat);
9020 sv_vcatpvf_mg(sv, pat, &args);
9024 /* backend for C<catpvf_mg> and C<catpvf_mg_nocontext> */
9027 Perl_sv_vcatpvf_mg(pTHX_ SV *sv, const char* pat, va_list* args)
9029 sv_vcatpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
9034 =for apidoc sv_vsetpvfn
9036 Works like C<vcatpvfn> but copies the text into the SV instead of
9039 Usually used via one of its frontends C<sv_setpvf> and C<sv_setpvf_mg>.
9045 Perl_sv_vsetpvfn(pTHX_ SV *sv, const char *pat, STRLEN patlen, va_list *args, SV **svargs, I32 svmax, bool *maybe_tainted)
9047 sv_setpvn(sv, "", 0);
9048 sv_vcatpvfn(sv, pat, patlen, args, svargs, svmax, maybe_tainted);
9051 /* private function for use in sv_vcatpvfn via the EXPECT_NUMBER macro */
9054 S_expect_number(pTHX_ char** pattern)
9057 switch (**pattern) {
9058 case '1': case '2': case '3':
9059 case '4': case '5': case '6':
9060 case '7': case '8': case '9':
9061 while (isDIGIT(**pattern))
9062 var = var * 10 + (*(*pattern)++ - '0');
9066 #define EXPECT_NUMBER(pattern, var) (var = S_expect_number(aTHX_ &pattern))
9069 F0convert(NV nv, char *endbuf, STRLEN *len)
9080 if (uv & 1 && uv == nv)
9081 uv--; /* Round to even */
9083 unsigned dig = uv % 10;
9096 =for apidoc sv_vcatpvfn
9098 Processes its arguments like C<vsprintf> and appends the formatted output
9099 to an SV. Uses an array of SVs if the C style variable argument list is
9100 missing (NULL). When running with taint checks enabled, indicates via
9101 C<maybe_tainted> if results are untrustworthy (often due to the use of
9104 Usually used via one of its frontends C<sv_catpvf> and C<sv_catpvf_mg>.
9110 Perl_sv_vcatpvfn(pTHX_ SV *sv, const char *pat, STRLEN patlen, va_list *args, SV **svargs, I32 svmax, bool *maybe_tainted)
9117 static char nullstr[] = "(null)";
9119 bool has_utf8; /* has the result utf8? */
9120 bool pat_utf8; /* the pattern is in utf8? */
9122 /* Times 4: a decimal digit takes more than 3 binary digits.
9123 * NV_DIG: mantissa takes than many decimal digits.
9124 * Plus 32: Playing safe. */
9125 char ebuf[IV_DIG * 4 + NV_DIG + 32];
9126 /* large enough for "%#.#f" --chip */
9127 /* what about long double NVs? --jhi */
9129 has_utf8 = pat_utf8 = DO_UTF8(sv);
9131 /* no matter what, this is a string now */
9132 (void)SvPV_force(sv, origlen);
9134 /* special-case "", "%s", and "%_" */
9137 if (patlen == 2 && pat[0] == '%') {
9141 char *s = va_arg(*args, char*);
9142 sv_catpv(sv, s ? s : nullstr);
9144 else if (svix < svmax) {
9145 sv_catsv(sv, *svargs);
9146 if (DO_UTF8(*svargs))
9152 argsv = va_arg(*args, SV*);
9153 sv_catsv(sv, argsv);
9158 /* See comment on '_' below */
9163 #ifndef USE_LONG_DOUBLE
9164 /* special-case "%.<number>[gf]" */
9165 if ( patlen <= 5 && pat[0] == '%' && pat[1] == '.'
9166 && (pat[patlen-1] == 'g' || pat[patlen-1] == 'f') ) {
9167 unsigned digits = 0;
9171 while (*pp >= '0' && *pp <= '9')
9172 digits = 10 * digits + (*pp++ - '0');
9173 if (pp - pat == (int)patlen - 1) {
9177 nv = (NV)va_arg(*args, double);
9178 else if (svix < svmax)
9183 /* Add check for digits != 0 because it seems that some
9184 gconverts are buggy in this case, and we don't yet have
9185 a Configure test for this. */
9186 if (digits && digits < sizeof(ebuf) - NV_DIG - 10) {
9187 /* 0, point, slack */
9188 Gconvert(nv, (int)digits, 0, ebuf);
9190 if (*ebuf) /* May return an empty string for digits==0 */
9193 } else if (!digits) {
9196 if ((p = F0convert(nv, ebuf + sizeof ebuf, &l))) {
9197 sv_catpvn(sv, p, l);
9203 #endif /* !USE_LONG_DOUBLE */
9205 if (!args && svix < svmax && DO_UTF8(*svargs))
9208 patend = (char*)pat + patlen;
9209 for (p = (char*)pat; p < patend; p = q) {
9212 bool vectorize = FALSE;
9213 bool vectorarg = FALSE;
9214 bool vec_utf8 = FALSE;
9220 bool has_precis = FALSE;
9223 bool is_utf8 = FALSE; /* is this item utf8? */
9224 #ifdef HAS_LDBL_SPRINTF_BUG
9225 /* This is to try to fix a bug with irix/nonstop-ux/powerux and
9226 with sfio - Allen <allens@cpan.org> */
9227 bool fix_ldbl_sprintf_bug = FALSE;
9231 U8 utf8buf[UTF8_MAXLEN+1];
9232 STRLEN esignlen = 0;
9234 char *eptr = Nullch;
9237 U8 *vecstr = Null(U8*);
9244 /* we need a long double target in case HAS_LONG_DOUBLE but
9247 #if defined(HAS_LONG_DOUBLE) && LONG_DOUBLESIZE > DOUBLESIZE
9256 STRLEN dotstrlen = 1;
9257 I32 efix = 0; /* explicit format parameter index */
9258 I32 ewix = 0; /* explicit width index */
9259 I32 epix = 0; /* explicit precision index */
9260 I32 evix = 0; /* explicit vector index */
9261 bool asterisk = FALSE;
9263 /* echo everything up to the next format specification */
9264 for (q = p; q < patend && *q != '%'; ++q) ;
9266 if (has_utf8 && !pat_utf8)
9267 sv_catpvn_utf8_upgrade(sv, p, q - p, nsv);
9269 sv_catpvn(sv, p, q - p);
9276 We allow format specification elements in this order:
9277 \d+\$ explicit format parameter index
9279 v|\*(\d+\$)?v vector with optional (optionally specified) arg
9280 0 flag (as above): repeated to allow "v02"
9281 \d+|\*(\d+\$)? width using optional (optionally specified) arg
9282 \.(\d*|\*(\d+\$)?) precision using optional (optionally specified) arg
9284 [%bcdefginopsux_DFOUX] format (mandatory)
9286 if (EXPECT_NUMBER(q, width)) {
9327 if (EXPECT_NUMBER(q, ewix))
9336 if ((vectorarg = asterisk)) {
9348 EXPECT_NUMBER(q, width);
9353 vecsv = va_arg(*args, SV*);
9355 vecsv = (evix ? evix <= svmax : svix < svmax) ?
9356 svargs[evix ? evix-1 : svix++] : &PL_sv_undef;
9357 dotstr = SvPVx(vecsv, dotstrlen);
9362 vecsv = va_arg(*args, SV*);
9363 vecstr = (U8*)SvPVx(vecsv,veclen);
9364 vec_utf8 = DO_UTF8(vecsv);
9366 else if (efix ? efix <= svmax : svix < svmax) {
9367 vecsv = svargs[efix ? efix-1 : svix++];
9368 vecstr = (U8*)SvPVx(vecsv,veclen);
9369 vec_utf8 = DO_UTF8(vecsv);
9379 i = va_arg(*args, int);
9381 i = (ewix ? ewix <= svmax : svix < svmax) ?
9382 SvIVx(svargs[ewix ? ewix-1 : svix++]) : 0;
9384 width = (i < 0) ? -i : i;
9394 if (EXPECT_NUMBER(q, epix) && *q++ != '$')
9396 /* XXX: todo, support specified precision parameter */
9400 i = va_arg(*args, int);
9402 i = (ewix ? ewix <= svmax : svix < svmax)
9403 ? SvIVx(svargs[ewix ? ewix-1 : svix++]) : 0;
9404 precis = (i < 0) ? 0 : i;
9409 precis = precis * 10 + (*q++ - '0');
9418 case 'I': /* Ix, I32x, and I64x */
9420 if (q[1] == '6' && q[2] == '4') {
9426 if (q[1] == '3' && q[2] == '2') {
9436 #if defined(HAS_QUAD) || defined(HAS_LONG_DOUBLE)
9447 #if defined(HAS_QUAD) || defined(HAS_LONG_DOUBLE)
9448 if (*(q + 1) == 'l') { /* lld, llf */
9473 argsv = (efix ? efix <= svmax : svix < svmax) ?
9474 svargs[efix ? efix-1 : svix++] : &PL_sv_undef;
9481 uv = (args && !vectorize) ? va_arg(*args, int) : SvIVx(argsv);
9483 (!UNI_IS_INVARIANT(uv) && SvUTF8(sv)))
9485 eptr = (char*)utf8buf;
9486 elen = uvchr_to_utf8((U8*)eptr, uv) - utf8buf;
9497 if (args && !vectorize) {
9498 eptr = va_arg(*args, char*);
9500 #ifdef MACOS_TRADITIONAL
9501 /* On MacOS, %#s format is used for Pascal strings */
9506 elen = strlen(eptr);
9509 elen = sizeof nullstr - 1;
9513 eptr = SvPVx(argsv, elen);
9514 if (DO_UTF8(argsv)) {
9515 if (has_precis && precis < elen) {
9517 sv_pos_u2b(argsv, &p, 0); /* sticks at end */
9520 if (width) { /* fudge width (can't fudge elen) */
9521 width += elen - sv_len_utf8(argsv);
9530 * The "%_" hack might have to be changed someday,
9531 * if ISO or ANSI decide to use '_' for something.
9532 * So we keep it hidden from users' code.
9534 if (!args || vectorize)
9536 argsv = va_arg(*args, SV*);
9537 eptr = SvPVx(argsv, elen);
9543 if (has_precis && elen > precis)
9550 if (alt || vectorize)
9552 uv = PTR2UV(args ? va_arg(*args, void*) : argsv);
9570 uv = utf8n_to_uvchr(vecstr, veclen, &ulen,
9579 esignbuf[esignlen++] = plus;
9583 case 'h': iv = (short)va_arg(*args, int); break;
9584 case 'l': iv = va_arg(*args, long); break;
9585 case 'V': iv = va_arg(*args, IV); break;
9586 default: iv = va_arg(*args, int); break;
9588 case 'q': iv = va_arg(*args, Quad_t); break;
9593 IV tiv = SvIVx(argsv); /* work around GCC bug #13488 */
9595 case 'h': iv = (short)tiv; break;
9596 case 'l': iv = (long)tiv; break;
9598 default: iv = tiv; break;
9600 case 'q': iv = (Quad_t)tiv; break;
9604 if ( !vectorize ) /* we already set uv above */
9609 esignbuf[esignlen++] = plus;
9613 esignbuf[esignlen++] = '-';
9656 uv = utf8n_to_uvchr(vecstr, veclen, &ulen,
9667 case 'h': uv = (unsigned short)va_arg(*args, unsigned); break;
9668 case 'l': uv = va_arg(*args, unsigned long); break;
9669 case 'V': uv = va_arg(*args, UV); break;
9670 default: uv = va_arg(*args, unsigned); break;
9672 case 'q': uv = va_arg(*args, Uquad_t); break;
9677 UV tuv = SvUVx(argsv); /* work around GCC bug #13488 */
9679 case 'h': uv = (unsigned short)tuv; break;
9680 case 'l': uv = (unsigned long)tuv; break;
9682 default: uv = tuv; break;
9684 case 'q': uv = (Uquad_t)tuv; break;
9690 eptr = ebuf + sizeof ebuf;
9696 p = (char*)((c == 'X')
9697 ? "0123456789ABCDEF" : "0123456789abcdef");
9703 esignbuf[esignlen++] = '0';
9704 esignbuf[esignlen++] = c; /* 'x' or 'X' */
9710 *--eptr = '0' + dig;
9712 if (alt && *eptr != '0')
9718 *--eptr = '0' + dig;
9721 esignbuf[esignlen++] = '0';
9722 esignbuf[esignlen++] = 'b';
9725 default: /* it had better be ten or less */
9726 #if defined(PERL_Y2KWARN)
9727 if (ckWARN(WARN_Y2K)) {
9729 char *s = SvPV(sv,n);
9730 if (n >= 2 && s[n-2] == '1' && s[n-1] == '9'
9731 && (n == 2 || !isDIGIT(s[n-3])))
9733 Perl_warner(aTHX_ packWARN(WARN_Y2K),
9734 "Possible Y2K bug: %%%c %s",
9735 c, "format string following '19'");
9741 *--eptr = '0' + dig;
9742 } while (uv /= base);
9745 elen = (ebuf + sizeof ebuf) - eptr;
9748 zeros = precis - elen;
9749 else if (precis == 0 && elen == 1 && *eptr == '0')
9754 /* FLOATING POINT */
9757 c = 'f'; /* maybe %F isn't supported here */
9763 /* This is evil, but floating point is even more evil */
9765 /* for SV-style calling, we can only get NV
9766 for C-style calling, we assume %f is double;
9767 for simplicity we allow any of %Lf, %llf, %qf for long double
9771 #if defined(USE_LONG_DOUBLE)
9775 /* [perl #20339] - we should accept and ignore %lf rather than die */
9779 #if defined(USE_LONG_DOUBLE)
9780 intsize = args ? 0 : 'q';
9784 #if defined(HAS_LONG_DOUBLE)
9793 /* now we need (long double) if intsize == 'q', else (double) */
9794 nv = (args && !vectorize) ?
9795 #if LONG_DOUBLESIZE > DOUBLESIZE
9797 va_arg(*args, long double) :
9798 va_arg(*args, double)
9800 va_arg(*args, double)
9806 if (c != 'e' && c != 'E') {
9808 /* FIXME: if HAS_LONG_DOUBLE but not USE_LONG_DOUBLE this
9809 will cast our (long double) to (double) */
9810 (void)Perl_frexp(nv, &i);
9811 if (i == PERL_INT_MIN)
9812 Perl_die(aTHX_ "panic: frexp");
9814 need = BIT_DIGITS(i);
9816 need += has_precis ? precis : 6; /* known default */
9821 #ifdef HAS_LDBL_SPRINTF_BUG
9822 /* This is to try to fix a bug with irix/nonstop-ux/powerux and
9823 with sfio - Allen <allens@cpan.org> */
9826 # define MY_DBL_MAX DBL_MAX
9827 # else /* XXX guessing! HUGE_VAL may be defined as infinity, so not using */
9828 # if DOUBLESIZE >= 8
9829 # define MY_DBL_MAX 1.7976931348623157E+308L
9831 # define MY_DBL_MAX 3.40282347E+38L
9835 # ifdef HAS_LDBL_SPRINTF_BUG_LESS1 /* only between -1L & 1L - Allen */
9836 # define MY_DBL_MAX_BUG 1L
9838 # define MY_DBL_MAX_BUG MY_DBL_MAX
9842 # define MY_DBL_MIN DBL_MIN
9843 # else /* XXX guessing! -Allen */
9844 # if DOUBLESIZE >= 8
9845 # define MY_DBL_MIN 2.2250738585072014E-308L
9847 # define MY_DBL_MIN 1.17549435E-38L
9851 if ((intsize == 'q') && (c == 'f') &&
9852 ((nv < MY_DBL_MAX_BUG) && (nv > -MY_DBL_MAX_BUG)) &&
9854 /* it's going to be short enough that
9855 * long double precision is not needed */
9857 if ((nv <= 0L) && (nv >= -0L))
9858 fix_ldbl_sprintf_bug = TRUE; /* 0 is 0 - easiest */
9860 /* would use Perl_fp_class as a double-check but not
9861 * functional on IRIX - see perl.h comments */
9863 if ((nv >= MY_DBL_MIN) || (nv <= -MY_DBL_MIN)) {
9864 /* It's within the range that a double can represent */
9865 #if defined(DBL_MAX) && !defined(DBL_MIN)
9866 if ((nv >= ((long double)1/DBL_MAX)) ||
9867 (nv <= (-(long double)1/DBL_MAX)))
9869 fix_ldbl_sprintf_bug = TRUE;
9872 if (fix_ldbl_sprintf_bug == TRUE) {
9882 # undef MY_DBL_MAX_BUG
9885 #endif /* HAS_LDBL_SPRINTF_BUG */
9887 need += 20; /* fudge factor */
9888 if (PL_efloatsize < need) {
9889 Safefree(PL_efloatbuf);
9890 PL_efloatsize = need + 20; /* more fudge */
9891 New(906, PL_efloatbuf, PL_efloatsize, char);
9892 PL_efloatbuf[0] = '\0';
9895 if ( !(width || left || plus || alt) && fill != '0'
9896 && has_precis && intsize != 'q' ) { /* Shortcuts */
9897 /* See earlier comment about buggy Gconvert when digits,
9899 if ( c == 'g' && precis) {
9900 Gconvert((NV)nv, (int)precis, 0, PL_efloatbuf);
9901 if (*PL_efloatbuf) /* May return an empty string for digits==0 */
9902 goto float_converted;
9903 } else if ( c == 'f' && !precis) {
9904 if ((eptr = F0convert(nv, ebuf + sizeof ebuf, &elen)))
9908 eptr = ebuf + sizeof ebuf;
9911 /* FIXME: what to do if HAS_LONG_DOUBLE but not PERL_PRIfldbl? */
9912 #if defined(HAS_LONG_DOUBLE) && defined(PERL_PRIfldbl)
9913 if (intsize == 'q') {
9914 /* Copy the one or more characters in a long double
9915 * format before the 'base' ([efgEFG]) character to
9916 * the format string. */
9917 static char const prifldbl[] = PERL_PRIfldbl;
9918 char const *p = prifldbl + sizeof(prifldbl) - 3;
9919 while (p >= prifldbl) { *--eptr = *p--; }
9924 do { *--eptr = '0' + (base % 10); } while (base /= 10);
9929 do { *--eptr = '0' + (base % 10); } while (base /= 10);
9941 /* No taint. Otherwise we are in the strange situation
9942 * where printf() taints but print($float) doesn't.
9944 #if defined(HAS_LONG_DOUBLE)
9946 (void)sprintf(PL_efloatbuf, eptr, nv);
9948 (void)sprintf(PL_efloatbuf, eptr, (double)nv);
9950 (void)sprintf(PL_efloatbuf, eptr, nv);
9953 eptr = PL_efloatbuf;
9954 elen = strlen(PL_efloatbuf);
9960 i = SvCUR(sv) - origlen;
9961 if (args && !vectorize) {
9963 case 'h': *(va_arg(*args, short*)) = i; break;
9964 default: *(va_arg(*args, int*)) = i; break;
9965 case 'l': *(va_arg(*args, long*)) = i; break;
9966 case 'V': *(va_arg(*args, IV*)) = i; break;
9968 case 'q': *(va_arg(*args, Quad_t*)) = i; break;
9973 sv_setuv_mg(argsv, (UV)i);
9975 continue; /* not "break" */
9981 if (!args && ckWARN(WARN_PRINTF) &&
9982 (PL_op->op_type == OP_PRTF || PL_op->op_type == OP_SPRINTF)) {
9983 SV *msg = sv_newmortal();
9984 Perl_sv_setpvf(aTHX_ msg, "Invalid conversion in %sprintf: ",
9985 (PL_op->op_type == OP_PRTF) ? "" : "s");
9988 Perl_sv_catpvf(aTHX_ msg,
9989 "\"%%%c\"", c & 0xFF);
9991 Perl_sv_catpvf(aTHX_ msg,
9992 "\"%%\\%03"UVof"\"",
9995 sv_catpv(msg, "end of string");
9996 Perl_warner(aTHX_ packWARN(WARN_PRINTF), "%"SVf, msg); /* yes, this is reentrant */
9999 /* output mangled stuff ... */
10005 /* ... right here, because formatting flags should not apply */
10006 SvGROW(sv, SvCUR(sv) + elen + 1);
10008 Copy(eptr, p, elen, char);
10011 SvCUR(sv) = p - SvPVX(sv);
10013 continue; /* not "break" */
10016 /* calculate width before utf8_upgrade changes it */
10017 have = esignlen + zeros + elen;
10019 if (is_utf8 != has_utf8) {
10022 sv_utf8_upgrade(sv);
10025 SV *nsv = sv_2mortal(newSVpvn(eptr, elen));
10026 sv_utf8_upgrade(nsv);
10030 SvGROW(sv, SvCUR(sv) + elen + 1);
10034 /* Use memchr() instead of strchr(), as eptr is not guaranteed */
10035 /* to point to a null-terminated string. */
10036 if (left && ckWARN(WARN_PRINTF) && memchr(eptr, '\n', elen) &&
10037 (PL_op->op_type == OP_PRTF || PL_op->op_type == OP_SPRINTF))
10038 Perl_warner(aTHX_ packWARN(WARN_PRINTF),
10039 "Newline in left-justified string for %sprintf",
10040 (PL_op->op_type == OP_PRTF) ? "" : "s");
10042 need = (have > width ? have : width);
10045 SvGROW(sv, SvCUR(sv) + need + dotstrlen + 1);
10047 if (esignlen && fill == '0') {
10048 for (i = 0; i < (int)esignlen; i++)
10049 *p++ = esignbuf[i];
10051 if (gap && !left) {
10052 memset(p, fill, gap);
10055 if (esignlen && fill != '0') {
10056 for (i = 0; i < (int)esignlen; i++)
10057 *p++ = esignbuf[i];
10060 for (i = zeros; i; i--)
10064 Copy(eptr, p, elen, char);
10068 memset(p, ' ', gap);
10073 Copy(dotstr, p, dotstrlen, char);
10077 vectorize = FALSE; /* done iterating over vecstr */
10084 SvCUR(sv) = p - SvPVX(sv);
10092 /* =========================================================================
10094 =head1 Cloning an interpreter
10096 All the macros and functions in this section are for the private use of
10097 the main function, perl_clone().
10099 The foo_dup() functions make an exact copy of an existing foo thinngy.
10100 During the course of a cloning, a hash table is used to map old addresses
10101 to new addresses. The table is created and manipulated with the
10102 ptr_table_* functions.
10106 ============================================================================*/
10109 #if defined(USE_ITHREADS)
10111 #ifndef GpREFCNT_inc
10112 # define GpREFCNT_inc(gp) ((gp) ? (++(gp)->gp_refcnt, (gp)) : (GP*)NULL)
10116 #define sv_dup_inc(s,t) SvREFCNT_inc(sv_dup(s,t))
10117 #define av_dup(s,t) (AV*)sv_dup((SV*)s,t)
10118 #define av_dup_inc(s,t) (AV*)SvREFCNT_inc(sv_dup((SV*)s,t))
10119 #define hv_dup(s,t) (HV*)sv_dup((SV*)s,t)
10120 #define hv_dup_inc(s,t) (HV*)SvREFCNT_inc(sv_dup((SV*)s,t))
10121 #define cv_dup(s,t) (CV*)sv_dup((SV*)s,t)
10122 #define cv_dup_inc(s,t) (CV*)SvREFCNT_inc(sv_dup((SV*)s,t))
10123 #define io_dup(s,t) (IO*)sv_dup((SV*)s,t)
10124 #define io_dup_inc(s,t) (IO*)SvREFCNT_inc(sv_dup((SV*)s,t))
10125 #define gv_dup(s,t) (GV*)sv_dup((SV*)s,t)
10126 #define gv_dup_inc(s,t) (GV*)SvREFCNT_inc(sv_dup((SV*)s,t))
10127 #define SAVEPV(p) (p ? savepv(p) : Nullch)
10128 #define SAVEPVN(p,n) (p ? savepvn(p,n) : Nullch)
10131 /* Duplicate a regexp. Required reading: pregcomp() and pregfree() in
10132 regcomp.c. AMS 20010712 */
10135 Perl_re_dup(pTHX_ REGEXP *r, CLONE_PARAMS *param)
10139 struct reg_substr_datum *s;
10142 return (REGEXP *)NULL;
10144 if ((ret = (REGEXP *)ptr_table_fetch(PL_ptr_table, r)))
10147 len = r->offsets[0];
10148 npar = r->nparens+1;
10150 Newc(0, ret, sizeof(regexp) + (len+1)*sizeof(regnode), char, regexp);
10151 Copy(r->program, ret->program, len+1, regnode);
10153 New(0, ret->startp, npar, I32);
10154 Copy(r->startp, ret->startp, npar, I32);
10155 New(0, ret->endp, npar, I32);
10156 Copy(r->startp, ret->startp, npar, I32);
10158 New(0, ret->substrs, 1, struct reg_substr_data);
10159 for (s = ret->substrs->data, i = 0; i < 3; i++, s++) {
10160 s->min_offset = r->substrs->data[i].min_offset;
10161 s->max_offset = r->substrs->data[i].max_offset;
10162 s->substr = sv_dup_inc(r->substrs->data[i].substr, param);
10163 s->utf8_substr = sv_dup_inc(r->substrs->data[i].utf8_substr, param);
10166 ret->regstclass = NULL;
10168 struct reg_data *d;
10169 int count = r->data->count;
10171 Newc(0, d, sizeof(struct reg_data) + count*sizeof(void *),
10172 char, struct reg_data);
10173 New(0, d->what, count, U8);
10176 for (i = 0; i < count; i++) {
10177 d->what[i] = r->data->what[i];
10178 switch (d->what[i]) {
10180 d->data[i] = sv_dup_inc((SV *)r->data->data[i], param);
10183 d->data[i] = av_dup_inc((AV *)r->data->data[i], param);
10186 /* This is cheating. */
10187 New(0, d->data[i], 1, struct regnode_charclass_class);
10188 StructCopy(r->data->data[i], d->data[i],
10189 struct regnode_charclass_class);
10190 ret->regstclass = (regnode*)d->data[i];
10193 /* Compiled op trees are readonly, and can thus be
10194 shared without duplication. */
10195 d->data[i] = (void*)OpREFCNT_inc((OP*)r->data->data[i]);
10198 d->data[i] = r->data->data[i];
10208 New(0, ret->offsets, 2*len+1, U32);
10209 Copy(r->offsets, ret->offsets, 2*len+1, U32);
10211 ret->precomp = SAVEPVN(r->precomp, r->prelen);
10212 ret->refcnt = r->refcnt;
10213 ret->minlen = r->minlen;
10214 ret->prelen = r->prelen;
10215 ret->nparens = r->nparens;
10216 ret->lastparen = r->lastparen;
10217 ret->lastcloseparen = r->lastcloseparen;
10218 ret->reganch = r->reganch;
10220 ret->sublen = r->sublen;
10222 if (RX_MATCH_COPIED(ret))
10223 ret->subbeg = SAVEPVN(r->subbeg, r->sublen);
10225 ret->subbeg = Nullch;
10226 #ifdef PERL_COPY_ON_WRITE
10227 ret->saved_copy = Nullsv;
10230 ptr_table_store(PL_ptr_table, r, ret);
10234 /* duplicate a file handle */
10237 Perl_fp_dup(pTHX_ PerlIO *fp, char type, CLONE_PARAMS *param)
10241 return (PerlIO*)NULL;
10243 /* look for it in the table first */
10244 ret = (PerlIO*)ptr_table_fetch(PL_ptr_table, fp);
10248 /* create anew and remember what it is */
10249 ret = PerlIO_fdupopen(aTHX_ fp, param, PERLIO_DUP_CLONE);
10250 ptr_table_store(PL_ptr_table, fp, ret);
10254 /* duplicate a directory handle */
10257 Perl_dirp_dup(pTHX_ DIR *dp)
10265 /* duplicate a typeglob */
10268 Perl_gp_dup(pTHX_ GP *gp, CLONE_PARAMS* param)
10273 /* look for it in the table first */
10274 ret = (GP*)ptr_table_fetch(PL_ptr_table, gp);
10278 /* create anew and remember what it is */
10279 Newz(0, ret, 1, GP);
10280 ptr_table_store(PL_ptr_table, gp, ret);
10283 ret->gp_refcnt = 0; /* must be before any other dups! */
10284 ret->gp_sv = sv_dup_inc(gp->gp_sv, param);
10285 ret->gp_io = io_dup_inc(gp->gp_io, param);
10286 ret->gp_form = cv_dup_inc(gp->gp_form, param);
10287 ret->gp_av = av_dup_inc(gp->gp_av, param);
10288 ret->gp_hv = hv_dup_inc(gp->gp_hv, param);
10289 ret->gp_egv = gv_dup(gp->gp_egv, param);/* GvEGV is not refcounted */
10290 ret->gp_cv = cv_dup_inc(gp->gp_cv, param);
10291 ret->gp_cvgen = gp->gp_cvgen;
10292 ret->gp_flags = gp->gp_flags;
10293 ret->gp_line = gp->gp_line;
10294 ret->gp_file = gp->gp_file; /* points to COP.cop_file */
10298 /* duplicate a chain of magic */
10301 Perl_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS* param)
10303 MAGIC *mgprev = (MAGIC*)NULL;
10306 return (MAGIC*)NULL;
10307 /* look for it in the table first */
10308 mgret = (MAGIC*)ptr_table_fetch(PL_ptr_table, mg);
10312 for (; mg; mg = mg->mg_moremagic) {
10314 Newz(0, nmg, 1, MAGIC);
10316 mgprev->mg_moremagic = nmg;
10319 nmg->mg_virtual = mg->mg_virtual; /* XXX copy dynamic vtable? */
10320 nmg->mg_private = mg->mg_private;
10321 nmg->mg_type = mg->mg_type;
10322 nmg->mg_flags = mg->mg_flags;
10323 if (mg->mg_type == PERL_MAGIC_qr) {
10324 nmg->mg_obj = (SV*)re_dup((REGEXP*)mg->mg_obj, param);
10326 else if(mg->mg_type == PERL_MAGIC_backref) {
10327 AV *av = (AV*) mg->mg_obj;
10330 SvREFCNT_inc(nmg->mg_obj = (SV*)newAV());
10332 for (i = AvFILLp(av); i >= 0; i--) {
10333 if (!svp[i]) continue;
10334 av_push((AV*)nmg->mg_obj,sv_dup(svp[i],param));
10338 nmg->mg_obj = (mg->mg_flags & MGf_REFCOUNTED)
10339 ? sv_dup_inc(mg->mg_obj, param)
10340 : sv_dup(mg->mg_obj, param);
10342 nmg->mg_len = mg->mg_len;
10343 nmg->mg_ptr = mg->mg_ptr; /* XXX random ptr? */
10344 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
10345 if (mg->mg_len > 0) {
10346 nmg->mg_ptr = SAVEPVN(mg->mg_ptr, mg->mg_len);
10347 if (mg->mg_type == PERL_MAGIC_overload_table &&
10348 AMT_AMAGIC((AMT*)mg->mg_ptr))
10350 AMT *amtp = (AMT*)mg->mg_ptr;
10351 AMT *namtp = (AMT*)nmg->mg_ptr;
10353 for (i = 1; i < NofAMmeth; i++) {
10354 namtp->table[i] = cv_dup_inc(amtp->table[i], param);
10358 else if (mg->mg_len == HEf_SVKEY)
10359 nmg->mg_ptr = (char*)sv_dup_inc((SV*)mg->mg_ptr, param);
10361 if ((mg->mg_flags & MGf_DUP) && mg->mg_virtual && mg->mg_virtual->svt_dup) {
10362 CALL_FPTR(nmg->mg_virtual->svt_dup)(aTHX_ nmg, param);
10369 /* create a new pointer-mapping table */
10372 Perl_ptr_table_new(pTHX)
10375 Newz(0, tbl, 1, PTR_TBL_t);
10376 tbl->tbl_max = 511;
10377 tbl->tbl_items = 0;
10378 Newz(0, tbl->tbl_ary, tbl->tbl_max + 1, PTR_TBL_ENT_t*);
10383 # define PTR_TABLE_HASH(ptr) (PTR2UV(ptr) >> 3)
10385 # define PTR_TABLE_HASH(ptr) (PTR2UV(ptr) >> 2)
10388 /* map an existing pointer using a table */
10391 Perl_ptr_table_fetch(pTHX_ PTR_TBL_t *tbl, void *sv)
10393 PTR_TBL_ENT_t *tblent;
10394 UV hash = PTR_TABLE_HASH(sv);
10396 tblent = tbl->tbl_ary[hash & tbl->tbl_max];
10397 for (; tblent; tblent = tblent->next) {
10398 if (tblent->oldval == sv)
10399 return tblent->newval;
10401 return (void*)NULL;
10404 /* add a new entry to a pointer-mapping table */
10407 Perl_ptr_table_store(pTHX_ PTR_TBL_t *tbl, void *oldv, void *newv)
10409 PTR_TBL_ENT_t *tblent, **otblent;
10410 /* XXX this may be pessimal on platforms where pointers aren't good
10411 * hash values e.g. if they grow faster in the most significant
10413 UV hash = PTR_TABLE_HASH(oldv);
10417 otblent = &tbl->tbl_ary[hash & tbl->tbl_max];
10418 for (tblent = *otblent; tblent; empty=0, tblent = tblent->next) {
10419 if (tblent->oldval == oldv) {
10420 tblent->newval = newv;
10424 Newz(0, tblent, 1, PTR_TBL_ENT_t);
10425 tblent->oldval = oldv;
10426 tblent->newval = newv;
10427 tblent->next = *otblent;
10430 if (!empty && tbl->tbl_items > tbl->tbl_max)
10431 ptr_table_split(tbl);
10434 /* double the hash bucket size of an existing ptr table */
10437 Perl_ptr_table_split(pTHX_ PTR_TBL_t *tbl)
10439 PTR_TBL_ENT_t **ary = tbl->tbl_ary;
10440 UV oldsize = tbl->tbl_max + 1;
10441 UV newsize = oldsize * 2;
10444 Renew(ary, newsize, PTR_TBL_ENT_t*);
10445 Zero(&ary[oldsize], newsize-oldsize, PTR_TBL_ENT_t*);
10446 tbl->tbl_max = --newsize;
10447 tbl->tbl_ary = ary;
10448 for (i=0; i < oldsize; i++, ary++) {
10449 PTR_TBL_ENT_t **curentp, **entp, *ent;
10452 curentp = ary + oldsize;
10453 for (entp = ary, ent = *ary; ent; ent = *entp) {
10454 if ((newsize & PTR_TABLE_HASH(ent->oldval)) != i) {
10456 ent->next = *curentp;
10466 /* remove all the entries from a ptr table */
10469 Perl_ptr_table_clear(pTHX_ PTR_TBL_t *tbl)
10471 register PTR_TBL_ENT_t **array;
10472 register PTR_TBL_ENT_t *entry;
10473 register PTR_TBL_ENT_t *oentry = Null(PTR_TBL_ENT_t*);
10477 if (!tbl || !tbl->tbl_items) {
10481 array = tbl->tbl_ary;
10483 max = tbl->tbl_max;
10488 entry = entry->next;
10492 if (++riter > max) {
10495 entry = array[riter];
10499 tbl->tbl_items = 0;
10502 /* clear and free a ptr table */
10505 Perl_ptr_table_free(pTHX_ PTR_TBL_t *tbl)
10510 ptr_table_clear(tbl);
10511 Safefree(tbl->tbl_ary);
10516 char *PL_watch_pvx;
10519 /* attempt to make everything in the typeglob readonly */
10522 S_gv_share(pTHX_ SV *sstr, CLONE_PARAMS *param)
10524 GV *gv = (GV*)sstr;
10525 SV *sv = ¶m->proto_perl->Isv_no; /* just need SvREADONLY-ness */
10527 if (GvIO(gv) || GvFORM(gv)) {
10528 GvUNIQUE_off(gv); /* GvIOs cannot be shared. nor can GvFORMs */
10530 else if (!GvCV(gv)) {
10531 GvCV(gv) = (CV*)sv;
10534 /* CvPADLISTs cannot be shared */
10535 if (!SvREADONLY(GvCV(gv)) && !CvXSUB(GvCV(gv))) {
10540 if (!GvUNIQUE(gv)) {
10542 PerlIO_printf(Perl_debug_log, "gv_share: unable to share %s::%s\n",
10543 HvNAME(GvSTASH(gv)), GvNAME(gv));
10549 * write attempts will die with
10550 * "Modification of a read-only value attempted"
10556 SvREADONLY_on(GvSV(gv));
10560 GvAV(gv) = (AV*)sv;
10563 SvREADONLY_on(GvAV(gv));
10567 GvHV(gv) = (HV*)sv;
10570 SvREADONLY_on(GvHV(gv));
10573 return sstr; /* he_dup() will SvREFCNT_inc() */
10576 /* duplicate an SV of any type (including AV, HV etc) */
10579 Perl_rvpv_dup(pTHX_ SV *dstr, SV *sstr, CLONE_PARAMS* param)
10582 SvRV(dstr) = SvWEAKREF(sstr)
10583 ? sv_dup(SvRV(sstr), param)
10584 : sv_dup_inc(SvRV(sstr), param);
10586 else if (SvPVX(sstr)) {
10587 /* Has something there */
10589 /* Normal PV - clone whole allocated space */
10590 SvPVX(dstr) = SAVEPVN(SvPVX(sstr), SvLEN(sstr)-1);
10591 if (SvREADONLY(sstr) && SvFAKE(sstr)) {
10592 /* Not that normal - actually sstr is copy on write.
10593 But we are a true, independant SV, so: */
10594 SvREADONLY_off(dstr);
10599 /* Special case - not normally malloced for some reason */
10600 if (SvREADONLY(sstr) && SvFAKE(sstr)) {
10601 /* A "shared" PV - clone it as unshared string */
10602 if(SvPADTMP(sstr)) {
10603 /* However, some of them live in the pad
10604 and they should not have these flags
10607 SvPVX(dstr) = sharepvn(SvPVX(sstr), SvCUR(sstr),
10609 SvUVX(dstr) = SvUVX(sstr);
10612 SvPVX(dstr) = SAVEPVN(SvPVX(sstr), SvCUR(sstr));
10614 SvREADONLY_off(dstr);
10618 /* Some other special case - random pointer */
10619 SvPVX(dstr) = SvPVX(sstr);
10624 /* Copy the Null */
10625 SvPVX(dstr) = SvPVX(sstr);
10630 Perl_sv_dup(pTHX_ SV *sstr, CLONE_PARAMS* param)
10634 if (!sstr || SvTYPE(sstr) == SVTYPEMASK)
10636 /* look for it in the table first */
10637 dstr = (SV*)ptr_table_fetch(PL_ptr_table, sstr);
10641 if(param->flags & CLONEf_JOIN_IN) {
10642 /** We are joining here so we don't want do clone
10643 something that is bad **/
10645 if(SvTYPE(sstr) == SVt_PVHV &&
10647 /** don't clone stashes if they already exist **/
10648 HV* old_stash = gv_stashpv(HvNAME(sstr),0);
10649 return (SV*) old_stash;
10653 /* create anew and remember what it is */
10655 ptr_table_store(PL_ptr_table, sstr, dstr);
10658 SvFLAGS(dstr) = SvFLAGS(sstr);
10659 SvFLAGS(dstr) &= ~SVf_OOK; /* don't propagate OOK hack */
10660 SvREFCNT(dstr) = 0; /* must be before any other dups! */
10663 if (SvANY(sstr) && PL_watch_pvx && SvPVX(sstr) == PL_watch_pvx)
10664 PerlIO_printf(Perl_debug_log, "watch at %p hit, found string \"%s\"\n",
10665 PL_watch_pvx, SvPVX(sstr));
10668 switch (SvTYPE(sstr)) {
10670 SvANY(dstr) = NULL;
10673 SvANY(dstr) = new_XIV();
10674 SvIVX(dstr) = SvIVX(sstr);
10677 SvANY(dstr) = new_XNV();
10678 SvNVX(dstr) = SvNVX(sstr);
10681 SvANY(dstr) = new_XRV();
10682 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
10685 SvANY(dstr) = new_XPV();
10686 SvCUR(dstr) = SvCUR(sstr);
10687 SvLEN(dstr) = SvLEN(sstr);
10688 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
10691 SvANY(dstr) = new_XPVIV();
10692 SvCUR(dstr) = SvCUR(sstr);
10693 SvLEN(dstr) = SvLEN(sstr);
10694 SvIVX(dstr) = SvIVX(sstr);
10695 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
10698 SvANY(dstr) = new_XPVNV();
10699 SvCUR(dstr) = SvCUR(sstr);
10700 SvLEN(dstr) = SvLEN(sstr);
10701 SvIVX(dstr) = SvIVX(sstr);
10702 SvNVX(dstr) = SvNVX(sstr);
10703 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
10706 SvANY(dstr) = new_XPVMG();
10707 SvCUR(dstr) = SvCUR(sstr);
10708 SvLEN(dstr) = SvLEN(sstr);
10709 SvIVX(dstr) = SvIVX(sstr);
10710 SvNVX(dstr) = SvNVX(sstr);
10711 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
10712 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
10713 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
10716 SvANY(dstr) = new_XPVBM();
10717 SvCUR(dstr) = SvCUR(sstr);
10718 SvLEN(dstr) = SvLEN(sstr);
10719 SvIVX(dstr) = SvIVX(sstr);
10720 SvNVX(dstr) = SvNVX(sstr);
10721 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
10722 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
10723 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
10724 BmRARE(dstr) = BmRARE(sstr);
10725 BmUSEFUL(dstr) = BmUSEFUL(sstr);
10726 BmPREVIOUS(dstr)= BmPREVIOUS(sstr);
10729 SvANY(dstr) = new_XPVLV();
10730 SvCUR(dstr) = SvCUR(sstr);
10731 SvLEN(dstr) = SvLEN(sstr);
10732 SvIVX(dstr) = SvIVX(sstr);
10733 SvNVX(dstr) = SvNVX(sstr);
10734 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
10735 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
10736 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
10737 LvTARGOFF(dstr) = LvTARGOFF(sstr); /* XXX sometimes holds PMOP* when DEBUGGING */
10738 LvTARGLEN(dstr) = LvTARGLEN(sstr);
10739 if (LvTYPE(sstr) == 't') /* for tie: unrefcnted fake (SV**) */
10740 LvTARG(dstr) = dstr;
10741 else if (LvTYPE(sstr) == 'T') /* for tie: fake HE */
10742 LvTARG(dstr) = (SV*)he_dup((HE*)LvTARG(sstr), 0, param);
10744 LvTARG(dstr) = sv_dup_inc(LvTARG(sstr), param);
10745 LvTYPE(dstr) = LvTYPE(sstr);
10748 if (GvUNIQUE((GV*)sstr)) {
10750 if ((share = gv_share(sstr, param))) {
10753 ptr_table_store(PL_ptr_table, sstr, dstr);
10755 PerlIO_printf(Perl_debug_log, "sv_dup: sharing %s::%s\n",
10756 HvNAME(GvSTASH(share)), GvNAME(share));
10761 SvANY(dstr) = new_XPVGV();
10762 SvCUR(dstr) = SvCUR(sstr);
10763 SvLEN(dstr) = SvLEN(sstr);
10764 SvIVX(dstr) = SvIVX(sstr);
10765 SvNVX(dstr) = SvNVX(sstr);
10766 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
10767 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
10768 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
10769 GvNAMELEN(dstr) = GvNAMELEN(sstr);
10770 GvNAME(dstr) = SAVEPVN(GvNAME(sstr), GvNAMELEN(sstr));
10771 GvSTASH(dstr) = hv_dup_inc(GvSTASH(sstr), param);
10772 GvFLAGS(dstr) = GvFLAGS(sstr);
10773 GvGP(dstr) = gp_dup(GvGP(sstr), param);
10774 (void)GpREFCNT_inc(GvGP(dstr));
10777 SvANY(dstr) = new_XPVIO();
10778 SvCUR(dstr) = SvCUR(sstr);
10779 SvLEN(dstr) = SvLEN(sstr);
10780 SvIVX(dstr) = SvIVX(sstr);
10781 SvNVX(dstr) = SvNVX(sstr);
10782 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
10783 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
10784 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
10785 IoIFP(dstr) = fp_dup(IoIFP(sstr), IoTYPE(sstr), param);
10786 if (IoOFP(sstr) == IoIFP(sstr))
10787 IoOFP(dstr) = IoIFP(dstr);
10789 IoOFP(dstr) = fp_dup(IoOFP(sstr), IoTYPE(sstr), param);
10790 /* PL_rsfp_filters entries have fake IoDIRP() */
10791 if (IoDIRP(sstr) && !(IoFLAGS(sstr) & IOf_FAKE_DIRP))
10792 IoDIRP(dstr) = dirp_dup(IoDIRP(sstr));
10794 IoDIRP(dstr) = IoDIRP(sstr);
10795 IoLINES(dstr) = IoLINES(sstr);
10796 IoPAGE(dstr) = IoPAGE(sstr);
10797 IoPAGE_LEN(dstr) = IoPAGE_LEN(sstr);
10798 IoLINES_LEFT(dstr) = IoLINES_LEFT(sstr);
10799 if(IoFLAGS(sstr) & IOf_FAKE_DIRP) {
10800 /* I have no idea why fake dirp (rsfps)
10801 should be treaded differently but otherwise
10802 we end up with leaks -- sky*/
10803 IoTOP_GV(dstr) = gv_dup_inc(IoTOP_GV(sstr), param);
10804 IoFMT_GV(dstr) = gv_dup_inc(IoFMT_GV(sstr), param);
10805 IoBOTTOM_GV(dstr) = gv_dup_inc(IoBOTTOM_GV(sstr), param);
10807 IoTOP_GV(dstr) = gv_dup(IoTOP_GV(sstr), param);
10808 IoFMT_GV(dstr) = gv_dup(IoFMT_GV(sstr), param);
10809 IoBOTTOM_GV(dstr) = gv_dup(IoBOTTOM_GV(sstr), param);
10811 IoTOP_NAME(dstr) = SAVEPV(IoTOP_NAME(sstr));
10812 IoFMT_NAME(dstr) = SAVEPV(IoFMT_NAME(sstr));
10813 IoBOTTOM_NAME(dstr) = SAVEPV(IoBOTTOM_NAME(sstr));
10814 IoSUBPROCESS(dstr) = IoSUBPROCESS(sstr);
10815 IoTYPE(dstr) = IoTYPE(sstr);
10816 IoFLAGS(dstr) = IoFLAGS(sstr);
10819 SvANY(dstr) = new_XPVAV();
10820 SvCUR(dstr) = SvCUR(sstr);
10821 SvLEN(dstr) = SvLEN(sstr);
10822 SvIVX(dstr) = SvIVX(sstr);
10823 SvNVX(dstr) = SvNVX(sstr);
10824 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
10825 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
10826 AvARYLEN((AV*)dstr) = sv_dup_inc(AvARYLEN((AV*)sstr), param);
10827 AvFLAGS((AV*)dstr) = AvFLAGS((AV*)sstr);
10828 if (AvARRAY((AV*)sstr)) {
10829 SV **dst_ary, **src_ary;
10830 SSize_t items = AvFILLp((AV*)sstr) + 1;
10832 src_ary = AvARRAY((AV*)sstr);
10833 Newz(0, dst_ary, AvMAX((AV*)sstr)+1, SV*);
10834 ptr_table_store(PL_ptr_table, src_ary, dst_ary);
10835 SvPVX(dstr) = (char*)dst_ary;
10836 AvALLOC((AV*)dstr) = dst_ary;
10837 if (AvREAL((AV*)sstr)) {
10838 while (items-- > 0)
10839 *dst_ary++ = sv_dup_inc(*src_ary++, param);
10842 while (items-- > 0)
10843 *dst_ary++ = sv_dup(*src_ary++, param);
10845 items = AvMAX((AV*)sstr) - AvFILLp((AV*)sstr);
10846 while (items-- > 0) {
10847 *dst_ary++ = &PL_sv_undef;
10851 SvPVX(dstr) = Nullch;
10852 AvALLOC((AV*)dstr) = (SV**)NULL;
10856 SvANY(dstr) = new_XPVHV();
10857 SvCUR(dstr) = SvCUR(sstr);
10858 SvLEN(dstr) = SvLEN(sstr);
10859 SvIVX(dstr) = SvIVX(sstr);
10860 SvNVX(dstr) = SvNVX(sstr);
10861 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
10862 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
10863 HvRITER((HV*)dstr) = HvRITER((HV*)sstr);
10864 if (HvARRAY((HV*)sstr)) {
10866 XPVHV *dxhv = (XPVHV*)SvANY(dstr);
10867 XPVHV *sxhv = (XPVHV*)SvANY(sstr);
10868 Newz(0, dxhv->xhv_array,
10869 PERL_HV_ARRAY_ALLOC_BYTES(dxhv->xhv_max+1), char);
10870 while (i <= sxhv->xhv_max) {
10871 ((HE**)dxhv->xhv_array)[i] = he_dup(((HE**)sxhv->xhv_array)[i],
10872 (bool)!!HvSHAREKEYS(sstr),
10876 dxhv->xhv_eiter = he_dup(sxhv->xhv_eiter,
10877 (bool)!!HvSHAREKEYS(sstr), param);
10880 SvPVX(dstr) = Nullch;
10881 HvEITER((HV*)dstr) = (HE*)NULL;
10883 HvPMROOT((HV*)dstr) = HvPMROOT((HV*)sstr); /* XXX */
10884 HvNAME((HV*)dstr) = SAVEPV(HvNAME((HV*)sstr));
10885 /* Record stashes for possible cloning in Perl_clone(). */
10886 if(HvNAME((HV*)dstr))
10887 av_push(param->stashes, dstr);
10890 SvANY(dstr) = new_XPVFM();
10891 FmLINES(dstr) = FmLINES(sstr);
10895 SvANY(dstr) = new_XPVCV();
10897 SvCUR(dstr) = SvCUR(sstr);
10898 SvLEN(dstr) = SvLEN(sstr);
10899 SvIVX(dstr) = SvIVX(sstr);
10900 SvNVX(dstr) = SvNVX(sstr);
10901 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
10902 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
10903 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
10904 CvSTASH(dstr) = hv_dup(CvSTASH(sstr), param); /* NOTE: not refcounted */
10905 CvSTART(dstr) = CvSTART(sstr);
10906 CvROOT(dstr) = OpREFCNT_inc(CvROOT(sstr));
10907 CvXSUB(dstr) = CvXSUB(sstr);
10908 CvXSUBANY(dstr) = CvXSUBANY(sstr);
10909 if (CvCONST(sstr)) {
10910 CvXSUBANY(dstr).any_ptr = GvUNIQUE(CvGV(sstr)) ?
10911 SvREFCNT_inc(CvXSUBANY(sstr).any_ptr) :
10912 sv_dup_inc(CvXSUBANY(sstr).any_ptr, param);
10914 /* don't dup if copying back - CvGV isn't refcounted, so the
10915 * duped GV may never be freed. A bit of a hack! DAPM */
10916 CvGV(dstr) = (param->flags & CLONEf_JOIN_IN) ?
10917 Nullgv : gv_dup(CvGV(sstr), param) ;
10918 if (param->flags & CLONEf_COPY_STACKS) {
10919 CvDEPTH(dstr) = CvDEPTH(sstr);
10923 PAD_DUP(CvPADLIST(dstr), CvPADLIST(sstr), param);
10924 CvOUTSIDE_SEQ(dstr) = CvOUTSIDE_SEQ(sstr);
10926 CvWEAKOUTSIDE(sstr)
10927 ? cv_dup( CvOUTSIDE(sstr), param)
10928 : cv_dup_inc(CvOUTSIDE(sstr), param);
10929 CvFLAGS(dstr) = CvFLAGS(sstr);
10930 CvFILE(dstr) = CvXSUB(sstr) ? CvFILE(sstr) : SAVEPV(CvFILE(sstr));
10933 Perl_croak(aTHX_ "Bizarre SvTYPE [%" IVdf "]", (IV)SvTYPE(sstr));
10937 if (SvOBJECT(dstr) && SvTYPE(dstr) != SVt_PVIO)
10943 /* duplicate a context */
10946 Perl_cx_dup(pTHX_ PERL_CONTEXT *cxs, I32 ix, I32 max, CLONE_PARAMS* param)
10948 PERL_CONTEXT *ncxs;
10951 return (PERL_CONTEXT*)NULL;
10953 /* look for it in the table first */
10954 ncxs = (PERL_CONTEXT*)ptr_table_fetch(PL_ptr_table, cxs);
10958 /* create anew and remember what it is */
10959 Newz(56, ncxs, max + 1, PERL_CONTEXT);
10960 ptr_table_store(PL_ptr_table, cxs, ncxs);
10963 PERL_CONTEXT *cx = &cxs[ix];
10964 PERL_CONTEXT *ncx = &ncxs[ix];
10965 ncx->cx_type = cx->cx_type;
10966 if (CxTYPE(cx) == CXt_SUBST) {
10967 Perl_croak(aTHX_ "Cloning substitution context is unimplemented");
10970 ncx->blk_oldsp = cx->blk_oldsp;
10971 ncx->blk_oldcop = cx->blk_oldcop;
10972 ncx->blk_oldretsp = cx->blk_oldretsp;
10973 ncx->blk_oldmarksp = cx->blk_oldmarksp;
10974 ncx->blk_oldscopesp = cx->blk_oldscopesp;
10975 ncx->blk_oldpm = cx->blk_oldpm;
10976 ncx->blk_gimme = cx->blk_gimme;
10977 switch (CxTYPE(cx)) {
10979 ncx->blk_sub.cv = (cx->blk_sub.olddepth == 0
10980 ? cv_dup_inc(cx->blk_sub.cv, param)
10981 : cv_dup(cx->blk_sub.cv,param));
10982 ncx->blk_sub.argarray = (cx->blk_sub.hasargs
10983 ? av_dup_inc(cx->blk_sub.argarray, param)
10985 ncx->blk_sub.savearray = av_dup_inc(cx->blk_sub.savearray, param);
10986 ncx->blk_sub.olddepth = cx->blk_sub.olddepth;
10987 ncx->blk_sub.hasargs = cx->blk_sub.hasargs;
10988 ncx->blk_sub.lval = cx->blk_sub.lval;
10991 ncx->blk_eval.old_in_eval = cx->blk_eval.old_in_eval;
10992 ncx->blk_eval.old_op_type = cx->blk_eval.old_op_type;
10993 ncx->blk_eval.old_namesv = sv_dup_inc(cx->blk_eval.old_namesv, param);
10994 ncx->blk_eval.old_eval_root = cx->blk_eval.old_eval_root;
10995 ncx->blk_eval.cur_text = sv_dup(cx->blk_eval.cur_text, param);
10998 ncx->blk_loop.label = cx->blk_loop.label;
10999 ncx->blk_loop.resetsp = cx->blk_loop.resetsp;
11000 ncx->blk_loop.redo_op = cx->blk_loop.redo_op;
11001 ncx->blk_loop.next_op = cx->blk_loop.next_op;
11002 ncx->blk_loop.last_op = cx->blk_loop.last_op;
11003 ncx->blk_loop.iterdata = (CxPADLOOP(cx)
11004 ? cx->blk_loop.iterdata
11005 : gv_dup((GV*)cx->blk_loop.iterdata, param));
11006 ncx->blk_loop.oldcomppad
11007 = (PAD*)ptr_table_fetch(PL_ptr_table,
11008 cx->blk_loop.oldcomppad);
11009 ncx->blk_loop.itersave = sv_dup_inc(cx->blk_loop.itersave, param);
11010 ncx->blk_loop.iterlval = sv_dup_inc(cx->blk_loop.iterlval, param);
11011 ncx->blk_loop.iterary = av_dup_inc(cx->blk_loop.iterary, param);
11012 ncx->blk_loop.iterix = cx->blk_loop.iterix;
11013 ncx->blk_loop.itermax = cx->blk_loop.itermax;
11016 ncx->blk_sub.cv = cv_dup(cx->blk_sub.cv, param);
11017 ncx->blk_sub.gv = gv_dup(cx->blk_sub.gv, param);
11018 ncx->blk_sub.dfoutgv = gv_dup_inc(cx->blk_sub.dfoutgv, param);
11019 ncx->blk_sub.hasargs = cx->blk_sub.hasargs;
11031 /* duplicate a stack info structure */
11034 Perl_si_dup(pTHX_ PERL_SI *si, CLONE_PARAMS* param)
11039 return (PERL_SI*)NULL;
11041 /* look for it in the table first */
11042 nsi = (PERL_SI*)ptr_table_fetch(PL_ptr_table, si);
11046 /* create anew and remember what it is */
11047 Newz(56, nsi, 1, PERL_SI);
11048 ptr_table_store(PL_ptr_table, si, nsi);
11050 nsi->si_stack = av_dup_inc(si->si_stack, param);
11051 nsi->si_cxix = si->si_cxix;
11052 nsi->si_cxmax = si->si_cxmax;
11053 nsi->si_cxstack = cx_dup(si->si_cxstack, si->si_cxix, si->si_cxmax, param);
11054 nsi->si_type = si->si_type;
11055 nsi->si_prev = si_dup(si->si_prev, param);
11056 nsi->si_next = si_dup(si->si_next, param);
11057 nsi->si_markoff = si->si_markoff;
11062 #define POPINT(ss,ix) ((ss)[--(ix)].any_i32)
11063 #define TOPINT(ss,ix) ((ss)[ix].any_i32)
11064 #define POPLONG(ss,ix) ((ss)[--(ix)].any_long)
11065 #define TOPLONG(ss,ix) ((ss)[ix].any_long)
11066 #define POPIV(ss,ix) ((ss)[--(ix)].any_iv)
11067 #define TOPIV(ss,ix) ((ss)[ix].any_iv)
11068 #define POPBOOL(ss,ix) ((ss)[--(ix)].any_bool)
11069 #define TOPBOOL(ss,ix) ((ss)[ix].any_bool)
11070 #define POPPTR(ss,ix) ((ss)[--(ix)].any_ptr)
11071 #define TOPPTR(ss,ix) ((ss)[ix].any_ptr)
11072 #define POPDPTR(ss,ix) ((ss)[--(ix)].any_dptr)
11073 #define TOPDPTR(ss,ix) ((ss)[ix].any_dptr)
11074 #define POPDXPTR(ss,ix) ((ss)[--(ix)].any_dxptr)
11075 #define TOPDXPTR(ss,ix) ((ss)[ix].any_dxptr)
11078 #define pv_dup_inc(p) SAVEPV(p)
11079 #define pv_dup(p) SAVEPV(p)
11080 #define svp_dup_inc(p,pp) any_dup(p,pp)
11082 /* map any object to the new equivent - either something in the
11083 * ptr table, or something in the interpreter structure
11087 Perl_any_dup(pTHX_ void *v, PerlInterpreter *proto_perl)
11092 return (void*)NULL;
11094 /* look for it in the table first */
11095 ret = ptr_table_fetch(PL_ptr_table, v);
11099 /* see if it is part of the interpreter structure */
11100 if (v >= (void*)proto_perl && v < (void*)(proto_perl+1))
11101 ret = (void*)(((char*)aTHX) + (((char*)v) - (char*)proto_perl));
11109 /* duplicate the save stack */
11112 Perl_ss_dup(pTHX_ PerlInterpreter *proto_perl, CLONE_PARAMS* param)
11114 ANY *ss = proto_perl->Tsavestack;
11115 I32 ix = proto_perl->Tsavestack_ix;
11116 I32 max = proto_perl->Tsavestack_max;
11129 void (*dptr) (void*);
11130 void (*dxptr) (pTHX_ void*);
11133 Newz(54, nss, max, ANY);
11137 TOPINT(nss,ix) = i;
11139 case SAVEt_ITEM: /* normal string */
11140 sv = (SV*)POPPTR(ss,ix);
11141 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
11142 sv = (SV*)POPPTR(ss,ix);
11143 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
11145 case SAVEt_SV: /* scalar reference */
11146 sv = (SV*)POPPTR(ss,ix);
11147 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
11148 gv = (GV*)POPPTR(ss,ix);
11149 TOPPTR(nss,ix) = gv_dup_inc(gv, param);
11151 case SAVEt_GENERIC_PVREF: /* generic char* */
11152 c = (char*)POPPTR(ss,ix);
11153 TOPPTR(nss,ix) = pv_dup(c);
11154 ptr = POPPTR(ss,ix);
11155 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11157 case SAVEt_SHARED_PVREF: /* char* in shared space */
11158 c = (char*)POPPTR(ss,ix);
11159 TOPPTR(nss,ix) = savesharedpv(c);
11160 ptr = POPPTR(ss,ix);
11161 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11163 case SAVEt_GENERIC_SVREF: /* generic sv */
11164 case SAVEt_SVREF: /* scalar reference */
11165 sv = (SV*)POPPTR(ss,ix);
11166 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
11167 ptr = POPPTR(ss,ix);
11168 TOPPTR(nss,ix) = svp_dup_inc((SV**)ptr, proto_perl);/* XXXXX */
11170 case SAVEt_AV: /* array reference */
11171 av = (AV*)POPPTR(ss,ix);
11172 TOPPTR(nss,ix) = av_dup_inc(av, param);
11173 gv = (GV*)POPPTR(ss,ix);
11174 TOPPTR(nss,ix) = gv_dup(gv, param);
11176 case SAVEt_HV: /* hash reference */
11177 hv = (HV*)POPPTR(ss,ix);
11178 TOPPTR(nss,ix) = hv_dup_inc(hv, param);
11179 gv = (GV*)POPPTR(ss,ix);
11180 TOPPTR(nss,ix) = gv_dup(gv, param);
11182 case SAVEt_INT: /* int reference */
11183 ptr = POPPTR(ss,ix);
11184 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11185 intval = (int)POPINT(ss,ix);
11186 TOPINT(nss,ix) = intval;
11188 case SAVEt_LONG: /* long reference */
11189 ptr = POPPTR(ss,ix);
11190 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11191 longval = (long)POPLONG(ss,ix);
11192 TOPLONG(nss,ix) = longval;
11194 case SAVEt_I32: /* I32 reference */
11195 case SAVEt_I16: /* I16 reference */
11196 case SAVEt_I8: /* I8 reference */
11197 ptr = POPPTR(ss,ix);
11198 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11200 TOPINT(nss,ix) = i;
11202 case SAVEt_IV: /* IV reference */
11203 ptr = POPPTR(ss,ix);
11204 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11206 TOPIV(nss,ix) = iv;
11208 case SAVEt_SPTR: /* SV* reference */
11209 ptr = POPPTR(ss,ix);
11210 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11211 sv = (SV*)POPPTR(ss,ix);
11212 TOPPTR(nss,ix) = sv_dup(sv, param);
11214 case SAVEt_VPTR: /* random* reference */
11215 ptr = POPPTR(ss,ix);
11216 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11217 ptr = POPPTR(ss,ix);
11218 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11220 case SAVEt_PPTR: /* char* reference */
11221 ptr = POPPTR(ss,ix);
11222 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11223 c = (char*)POPPTR(ss,ix);
11224 TOPPTR(nss,ix) = pv_dup(c);
11226 case SAVEt_HPTR: /* HV* reference */
11227 ptr = POPPTR(ss,ix);
11228 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11229 hv = (HV*)POPPTR(ss,ix);
11230 TOPPTR(nss,ix) = hv_dup(hv, param);
11232 case SAVEt_APTR: /* AV* reference */
11233 ptr = POPPTR(ss,ix);
11234 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11235 av = (AV*)POPPTR(ss,ix);
11236 TOPPTR(nss,ix) = av_dup(av, param);
11239 gv = (GV*)POPPTR(ss,ix);
11240 TOPPTR(nss,ix) = gv_dup(gv, param);
11242 case SAVEt_GP: /* scalar reference */
11243 gp = (GP*)POPPTR(ss,ix);
11244 TOPPTR(nss,ix) = gp = gp_dup(gp, param);
11245 (void)GpREFCNT_inc(gp);
11246 gv = (GV*)POPPTR(ss,ix);
11247 TOPPTR(nss,ix) = gv_dup_inc(gv, param);
11248 c = (char*)POPPTR(ss,ix);
11249 TOPPTR(nss,ix) = pv_dup(c);
11251 TOPIV(nss,ix) = iv;
11253 TOPIV(nss,ix) = iv;
11256 case SAVEt_MORTALIZESV:
11257 sv = (SV*)POPPTR(ss,ix);
11258 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
11261 ptr = POPPTR(ss,ix);
11262 if (ptr && (((OP*)ptr)->op_private & OPpREFCOUNTED)) {
11263 /* these are assumed to be refcounted properly */
11264 switch (((OP*)ptr)->op_type) {
11266 case OP_LEAVESUBLV:
11270 case OP_LEAVEWRITE:
11271 TOPPTR(nss,ix) = ptr;
11276 TOPPTR(nss,ix) = Nullop;
11281 TOPPTR(nss,ix) = Nullop;
11284 c = (char*)POPPTR(ss,ix);
11285 TOPPTR(nss,ix) = pv_dup_inc(c);
11287 case SAVEt_CLEARSV:
11288 longval = POPLONG(ss,ix);
11289 TOPLONG(nss,ix) = longval;
11292 hv = (HV*)POPPTR(ss,ix);
11293 TOPPTR(nss,ix) = hv_dup_inc(hv, param);
11294 c = (char*)POPPTR(ss,ix);
11295 TOPPTR(nss,ix) = pv_dup_inc(c);
11297 TOPINT(nss,ix) = i;
11299 case SAVEt_DESTRUCTOR:
11300 ptr = POPPTR(ss,ix);
11301 TOPPTR(nss,ix) = any_dup(ptr, proto_perl); /* XXX quite arbitrary */
11302 dptr = POPDPTR(ss,ix);
11303 TOPDPTR(nss,ix) = (void (*)(void*))any_dup((void *)dptr, proto_perl);
11305 case SAVEt_DESTRUCTOR_X:
11306 ptr = POPPTR(ss,ix);
11307 TOPPTR(nss,ix) = any_dup(ptr, proto_perl); /* XXX quite arbitrary */
11308 dxptr = POPDXPTR(ss,ix);
11309 TOPDXPTR(nss,ix) = (void (*)(pTHX_ void*))any_dup((void *)dxptr, proto_perl);
11311 case SAVEt_REGCONTEXT:
11314 TOPINT(nss,ix) = i;
11317 case SAVEt_STACK_POS: /* Position on Perl stack */
11319 TOPINT(nss,ix) = i;
11321 case SAVEt_AELEM: /* array element */
11322 sv = (SV*)POPPTR(ss,ix);
11323 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
11325 TOPINT(nss,ix) = i;
11326 av = (AV*)POPPTR(ss,ix);
11327 TOPPTR(nss,ix) = av_dup_inc(av, param);
11329 case SAVEt_HELEM: /* hash element */
11330 sv = (SV*)POPPTR(ss,ix);
11331 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
11332 sv = (SV*)POPPTR(ss,ix);
11333 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
11334 hv = (HV*)POPPTR(ss,ix);
11335 TOPPTR(nss,ix) = hv_dup_inc(hv, param);
11338 ptr = POPPTR(ss,ix);
11339 TOPPTR(nss,ix) = ptr;
11343 TOPINT(nss,ix) = i;
11345 case SAVEt_COMPPAD:
11346 av = (AV*)POPPTR(ss,ix);
11347 TOPPTR(nss,ix) = av_dup(av, param);
11350 longval = (long)POPLONG(ss,ix);
11351 TOPLONG(nss,ix) = longval;
11352 ptr = POPPTR(ss,ix);
11353 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11354 sv = (SV*)POPPTR(ss,ix);
11355 TOPPTR(nss,ix) = sv_dup(sv, param);
11358 ptr = POPPTR(ss,ix);
11359 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
11360 longval = (long)POPBOOL(ss,ix);
11361 TOPBOOL(nss,ix) = (bool)longval;
11363 case SAVEt_SET_SVFLAGS:
11365 TOPINT(nss,ix) = i;
11367 TOPINT(nss,ix) = i;
11368 sv = (SV*)POPPTR(ss,ix);
11369 TOPPTR(nss,ix) = sv_dup(sv, param);
11372 Perl_croak(aTHX_ "panic: ss_dup inconsistency");
11380 =for apidoc perl_clone
11382 Create and return a new interpreter by cloning the current one.
11384 perl_clone takes these flags as parameters:
11386 CLONEf_COPY_STACKS - is used to, well, copy the stacks also,
11387 without it we only clone the data and zero the stacks,
11388 with it we copy the stacks and the new perl interpreter is
11389 ready to run at the exact same point as the previous one.
11390 The pseudo-fork code uses COPY_STACKS while the
11391 threads->new doesn't.
11393 CLONEf_KEEP_PTR_TABLE
11394 perl_clone keeps a ptr_table with the pointer of the old
11395 variable as a key and the new variable as a value,
11396 this allows it to check if something has been cloned and not
11397 clone it again but rather just use the value and increase the
11398 refcount. If KEEP_PTR_TABLE is not set then perl_clone will kill
11399 the ptr_table using the function
11400 C<ptr_table_free(PL_ptr_table); PL_ptr_table = NULL;>,
11401 reason to keep it around is if you want to dup some of your own
11402 variable who are outside the graph perl scans, example of this
11403 code is in threads.xs create
11406 This is a win32 thing, it is ignored on unix, it tells perls
11407 win32host code (which is c++) to clone itself, this is needed on
11408 win32 if you want to run two threads at the same time,
11409 if you just want to do some stuff in a separate perl interpreter
11410 and then throw it away and return to the original one,
11411 you don't need to do anything.
11416 /* XXX the above needs expanding by someone who actually understands it ! */
11417 EXTERN_C PerlInterpreter *
11418 perl_clone_host(PerlInterpreter* proto_perl, UV flags);
11421 perl_clone(PerlInterpreter *proto_perl, UV flags)
11423 #ifdef PERL_IMPLICIT_SYS
11425 /* perlhost.h so we need to call into it
11426 to clone the host, CPerlHost should have a c interface, sky */
11428 if (flags & CLONEf_CLONE_HOST) {
11429 return perl_clone_host(proto_perl,flags);
11431 return perl_clone_using(proto_perl, flags,
11433 proto_perl->IMemShared,
11434 proto_perl->IMemParse,
11436 proto_perl->IStdIO,
11440 proto_perl->IProc);
11444 perl_clone_using(PerlInterpreter *proto_perl, UV flags,
11445 struct IPerlMem* ipM, struct IPerlMem* ipMS,
11446 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
11447 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
11448 struct IPerlDir* ipD, struct IPerlSock* ipS,
11449 struct IPerlProc* ipP)
11451 /* XXX many of the string copies here can be optimized if they're
11452 * constants; they need to be allocated as common memory and just
11453 * their pointers copied. */
11456 CLONE_PARAMS clone_params;
11457 CLONE_PARAMS* param = &clone_params;
11459 PerlInterpreter *my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
11460 PERL_SET_THX(my_perl);
11463 Poison(my_perl, 1, PerlInterpreter);
11467 PL_savestack_ix = 0;
11468 PL_savestack_max = -1;
11470 PL_sig_pending = 0;
11471 Zero(&PL_debug_pad, 1, struct perl_debug_pad);
11472 # else /* !DEBUGGING */
11473 Zero(my_perl, 1, PerlInterpreter);
11474 # endif /* DEBUGGING */
11476 /* host pointers */
11478 PL_MemShared = ipMS;
11479 PL_MemParse = ipMP;
11486 #else /* !PERL_IMPLICIT_SYS */
11488 CLONE_PARAMS clone_params;
11489 CLONE_PARAMS* param = &clone_params;
11490 PerlInterpreter *my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
11491 PERL_SET_THX(my_perl);
11496 Poison(my_perl, 1, PerlInterpreter);
11500 PL_savestack_ix = 0;
11501 PL_savestack_max = -1;
11503 PL_sig_pending = 0;
11504 Zero(&PL_debug_pad, 1, struct perl_debug_pad);
11505 # else /* !DEBUGGING */
11506 Zero(my_perl, 1, PerlInterpreter);
11507 # endif /* DEBUGGING */
11508 #endif /* PERL_IMPLICIT_SYS */
11509 param->flags = flags;
11510 param->proto_perl = proto_perl;
11513 PL_xiv_arenaroot = NULL;
11514 PL_xiv_root = NULL;
11515 PL_xnv_arenaroot = NULL;
11516 PL_xnv_root = NULL;
11517 PL_xrv_arenaroot = NULL;
11518 PL_xrv_root = NULL;
11519 PL_xpv_arenaroot = NULL;
11520 PL_xpv_root = NULL;
11521 PL_xpviv_arenaroot = NULL;
11522 PL_xpviv_root = NULL;
11523 PL_xpvnv_arenaroot = NULL;
11524 PL_xpvnv_root = NULL;
11525 PL_xpvcv_arenaroot = NULL;
11526 PL_xpvcv_root = NULL;
11527 PL_xpvav_arenaroot = NULL;
11528 PL_xpvav_root = NULL;
11529 PL_xpvhv_arenaroot = NULL;
11530 PL_xpvhv_root = NULL;
11531 PL_xpvmg_arenaroot = NULL;
11532 PL_xpvmg_root = NULL;
11533 PL_xpvlv_arenaroot = NULL;
11534 PL_xpvlv_root = NULL;
11535 PL_xpvbm_arenaroot = NULL;
11536 PL_xpvbm_root = NULL;
11537 PL_he_arenaroot = NULL;
11539 PL_nice_chunk = NULL;
11540 PL_nice_chunk_size = 0;
11542 PL_sv_objcount = 0;
11543 PL_sv_root = Nullsv;
11544 PL_sv_arenaroot = Nullsv;
11546 PL_debug = proto_perl->Idebug;
11548 #ifdef USE_REENTRANT_API
11549 /* XXX: things like -Dm will segfault here in perlio, but doing
11550 * PERL_SET_CONTEXT(proto_perl);
11551 * breaks too many other things
11553 Perl_reentrant_init(aTHX);
11556 /* create SV map for pointer relocation */
11557 PL_ptr_table = ptr_table_new();
11559 /* initialize these special pointers as early as possible */
11560 SvANY(&PL_sv_undef) = NULL;
11561 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
11562 SvFLAGS(&PL_sv_undef) = SVf_READONLY|SVt_NULL;
11563 ptr_table_store(PL_ptr_table, &proto_perl->Isv_undef, &PL_sv_undef);
11565 SvANY(&PL_sv_no) = new_XPVNV();
11566 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
11567 SvFLAGS(&PL_sv_no) = SVp_NOK|SVf_NOK|SVp_POK|SVf_POK|SVf_READONLY|SVt_PVNV;
11568 SvPVX(&PL_sv_no) = SAVEPVN(PL_No, 0);
11569 SvCUR(&PL_sv_no) = 0;
11570 SvLEN(&PL_sv_no) = 1;
11571 SvNVX(&PL_sv_no) = 0;
11572 ptr_table_store(PL_ptr_table, &proto_perl->Isv_no, &PL_sv_no);
11574 SvANY(&PL_sv_yes) = new_XPVNV();
11575 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
11576 SvFLAGS(&PL_sv_yes) = SVp_NOK|SVf_NOK|SVp_POK|SVf_POK|SVf_READONLY|SVt_PVNV;
11577 SvPVX(&PL_sv_yes) = SAVEPVN(PL_Yes, 1);
11578 SvCUR(&PL_sv_yes) = 1;
11579 SvLEN(&PL_sv_yes) = 2;
11580 SvNVX(&PL_sv_yes) = 1;
11581 ptr_table_store(PL_ptr_table, &proto_perl->Isv_yes, &PL_sv_yes);
11583 /* create (a non-shared!) shared string table */
11584 PL_strtab = newHV();
11585 HvSHAREKEYS_off(PL_strtab);
11586 hv_ksplit(PL_strtab, 512);
11587 ptr_table_store(PL_ptr_table, proto_perl->Istrtab, PL_strtab);
11589 PL_compiling = proto_perl->Icompiling;
11591 /* These two PVs will be free'd special way so must set them same way op.c does */
11592 PL_compiling.cop_stashpv = savesharedpv(PL_compiling.cop_stashpv);
11593 ptr_table_store(PL_ptr_table, proto_perl->Icompiling.cop_stashpv, PL_compiling.cop_stashpv);
11595 PL_compiling.cop_file = savesharedpv(PL_compiling.cop_file);
11596 ptr_table_store(PL_ptr_table, proto_perl->Icompiling.cop_file, PL_compiling.cop_file);
11598 ptr_table_store(PL_ptr_table, &proto_perl->Icompiling, &PL_compiling);
11599 if (!specialWARN(PL_compiling.cop_warnings))
11600 PL_compiling.cop_warnings = sv_dup_inc(PL_compiling.cop_warnings, param);
11601 if (!specialCopIO(PL_compiling.cop_io))
11602 PL_compiling.cop_io = sv_dup_inc(PL_compiling.cop_io, param);
11603 PL_curcop = (COP*)any_dup(proto_perl->Tcurcop, proto_perl);
11605 /* pseudo environmental stuff */
11606 PL_origargc = proto_perl->Iorigargc;
11607 PL_origargv = proto_perl->Iorigargv;
11609 param->stashes = newAV(); /* Setup array of objects to call clone on */
11611 #ifdef PERLIO_LAYERS
11612 /* Clone PerlIO tables as soon as we can handle general xx_dup() */
11613 PerlIO_clone(aTHX_ proto_perl, param);
11616 PL_envgv = gv_dup(proto_perl->Ienvgv, param);
11617 PL_incgv = gv_dup(proto_perl->Iincgv, param);
11618 PL_hintgv = gv_dup(proto_perl->Ihintgv, param);
11619 PL_origfilename = SAVEPV(proto_perl->Iorigfilename);
11620 PL_diehook = sv_dup_inc(proto_perl->Idiehook, param);
11621 PL_warnhook = sv_dup_inc(proto_perl->Iwarnhook, param);
11624 PL_minus_c = proto_perl->Iminus_c;
11625 PL_patchlevel = sv_dup_inc(proto_perl->Ipatchlevel, param);
11626 PL_localpatches = proto_perl->Ilocalpatches;
11627 PL_splitstr = proto_perl->Isplitstr;
11628 PL_preprocess = proto_perl->Ipreprocess;
11629 PL_minus_n = proto_perl->Iminus_n;
11630 PL_minus_p = proto_perl->Iminus_p;
11631 PL_minus_l = proto_perl->Iminus_l;
11632 PL_minus_a = proto_perl->Iminus_a;
11633 PL_minus_F = proto_perl->Iminus_F;
11634 PL_doswitches = proto_perl->Idoswitches;
11635 PL_dowarn = proto_perl->Idowarn;
11636 PL_doextract = proto_perl->Idoextract;
11637 PL_sawampersand = proto_perl->Isawampersand;
11638 PL_unsafe = proto_perl->Iunsafe;
11639 PL_inplace = SAVEPV(proto_perl->Iinplace);
11640 PL_e_script = sv_dup_inc(proto_perl->Ie_script, param);
11641 PL_perldb = proto_perl->Iperldb;
11642 PL_perl_destruct_level = proto_perl->Iperl_destruct_level;
11643 PL_exit_flags = proto_perl->Iexit_flags;
11645 /* magical thingies */
11646 /* XXX time(&PL_basetime) when asked for? */
11647 PL_basetime = proto_perl->Ibasetime;
11648 PL_formfeed = sv_dup(proto_perl->Iformfeed, param);
11650 PL_maxsysfd = proto_perl->Imaxsysfd;
11651 PL_multiline = proto_perl->Imultiline;
11652 PL_statusvalue = proto_perl->Istatusvalue;
11654 PL_statusvalue_vms = proto_perl->Istatusvalue_vms;
11656 PL_encoding = sv_dup(proto_perl->Iencoding, param);
11658 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
11659 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
11660 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
11662 /* Clone the regex array */
11663 PL_regex_padav = newAV();
11665 I32 len = av_len((AV*)proto_perl->Iregex_padav);
11666 SV** regexen = AvARRAY((AV*)proto_perl->Iregex_padav);
11667 av_push(PL_regex_padav,
11668 sv_dup_inc(regexen[0],param));
11669 for(i = 1; i <= len; i++) {
11670 if(SvREPADTMP(regexen[i])) {
11671 av_push(PL_regex_padav, sv_dup_inc(regexen[i], param));
11673 av_push(PL_regex_padav,
11675 newSViv(PTR2IV(re_dup(INT2PTR(REGEXP *,
11676 SvIVX(regexen[i])), param)))
11681 PL_regex_pad = AvARRAY(PL_regex_padav);
11683 /* shortcuts to various I/O objects */
11684 PL_stdingv = gv_dup(proto_perl->Istdingv, param);
11685 PL_stderrgv = gv_dup(proto_perl->Istderrgv, param);
11686 PL_defgv = gv_dup(proto_perl->Idefgv, param);
11687 PL_argvgv = gv_dup(proto_perl->Iargvgv, param);
11688 PL_argvoutgv = gv_dup(proto_perl->Iargvoutgv, param);
11689 PL_argvout_stack = av_dup_inc(proto_perl->Iargvout_stack, param);
11691 /* shortcuts to regexp stuff */
11692 PL_replgv = gv_dup(proto_perl->Ireplgv, param);
11694 /* shortcuts to misc objects */
11695 PL_errgv = gv_dup(proto_perl->Ierrgv, param);
11697 /* shortcuts to debugging objects */
11698 PL_DBgv = gv_dup(proto_perl->IDBgv, param);
11699 PL_DBline = gv_dup(proto_perl->IDBline, param);
11700 PL_DBsub = gv_dup(proto_perl->IDBsub, param);
11701 PL_DBsingle = sv_dup(proto_perl->IDBsingle, param);
11702 PL_DBtrace = sv_dup(proto_perl->IDBtrace, param);
11703 PL_DBsignal = sv_dup(proto_perl->IDBsignal, param);
11704 PL_DBassertion = sv_dup(proto_perl->IDBassertion, param);
11705 PL_lineary = av_dup(proto_perl->Ilineary, param);
11706 PL_dbargs = av_dup(proto_perl->Idbargs, param);
11708 /* symbol tables */
11709 PL_defstash = hv_dup_inc(proto_perl->Tdefstash, param);
11710 PL_curstash = hv_dup(proto_perl->Tcurstash, param);
11711 PL_debstash = hv_dup(proto_perl->Idebstash, param);
11712 PL_globalstash = hv_dup(proto_perl->Iglobalstash, param);
11713 PL_curstname = sv_dup_inc(proto_perl->Icurstname, param);
11715 PL_beginav = av_dup_inc(proto_perl->Ibeginav, param);
11716 PL_beginav_save = av_dup_inc(proto_perl->Ibeginav_save, param);
11717 PL_checkav_save = av_dup_inc(proto_perl->Icheckav_save, param);
11718 PL_endav = av_dup_inc(proto_perl->Iendav, param);
11719 PL_checkav = av_dup_inc(proto_perl->Icheckav, param);
11720 PL_initav = av_dup_inc(proto_perl->Iinitav, param);
11722 PL_sub_generation = proto_perl->Isub_generation;
11724 /* funky return mechanisms */
11725 PL_forkprocess = proto_perl->Iforkprocess;
11727 /* subprocess state */
11728 PL_fdpid = av_dup_inc(proto_perl->Ifdpid, param);
11730 /* internal state */
11731 PL_tainting = proto_perl->Itainting;
11732 PL_taint_warn = proto_perl->Itaint_warn;
11733 PL_maxo = proto_perl->Imaxo;
11734 if (proto_perl->Iop_mask)
11735 PL_op_mask = SAVEPVN(proto_perl->Iop_mask, PL_maxo);
11737 PL_op_mask = Nullch;
11738 /* PL_asserting = proto_perl->Iasserting; */
11740 /* current interpreter roots */
11741 PL_main_cv = cv_dup_inc(proto_perl->Imain_cv, param);
11742 PL_main_root = OpREFCNT_inc(proto_perl->Imain_root);
11743 PL_main_start = proto_perl->Imain_start;
11744 PL_eval_root = proto_perl->Ieval_root;
11745 PL_eval_start = proto_perl->Ieval_start;
11747 /* runtime control stuff */
11748 PL_curcopdb = (COP*)any_dup(proto_perl->Icurcopdb, proto_perl);
11749 PL_copline = proto_perl->Icopline;
11751 PL_filemode = proto_perl->Ifilemode;
11752 PL_lastfd = proto_perl->Ilastfd;
11753 PL_oldname = proto_perl->Ioldname; /* XXX not quite right */
11756 PL_gensym = proto_perl->Igensym;
11757 PL_preambled = proto_perl->Ipreambled;
11758 PL_preambleav = av_dup_inc(proto_perl->Ipreambleav, param);
11759 PL_laststatval = proto_perl->Ilaststatval;
11760 PL_laststype = proto_perl->Ilaststype;
11761 PL_mess_sv = Nullsv;
11763 PL_ors_sv = sv_dup_inc(proto_perl->Iors_sv, param);
11764 PL_ofmt = SAVEPV(proto_perl->Iofmt);
11766 /* interpreter atexit processing */
11767 PL_exitlistlen = proto_perl->Iexitlistlen;
11768 if (PL_exitlistlen) {
11769 New(0, PL_exitlist, PL_exitlistlen, PerlExitListEntry);
11770 Copy(proto_perl->Iexitlist, PL_exitlist, PL_exitlistlen, PerlExitListEntry);
11773 PL_exitlist = (PerlExitListEntry*)NULL;
11774 PL_modglobal = hv_dup_inc(proto_perl->Imodglobal, param);
11775 PL_custom_op_names = hv_dup_inc(proto_perl->Icustom_op_names,param);
11776 PL_custom_op_descs = hv_dup_inc(proto_perl->Icustom_op_descs,param);
11778 PL_profiledata = NULL;
11779 PL_rsfp = fp_dup(proto_perl->Irsfp, '<', param);
11780 /* PL_rsfp_filters entries have fake IoDIRP() */
11781 PL_rsfp_filters = av_dup_inc(proto_perl->Irsfp_filters, param);
11783 PL_compcv = cv_dup(proto_perl->Icompcv, param);
11785 PAD_CLONE_VARS(proto_perl, param);
11787 #ifdef HAVE_INTERP_INTERN
11788 sys_intern_dup(&proto_perl->Isys_intern, &PL_sys_intern);
11791 /* more statics moved here */
11792 PL_generation = proto_perl->Igeneration;
11793 PL_DBcv = cv_dup(proto_perl->IDBcv, param);
11795 PL_in_clean_objs = proto_perl->Iin_clean_objs;
11796 PL_in_clean_all = proto_perl->Iin_clean_all;
11798 PL_uid = proto_perl->Iuid;
11799 PL_euid = proto_perl->Ieuid;
11800 PL_gid = proto_perl->Igid;
11801 PL_egid = proto_perl->Iegid;
11802 PL_nomemok = proto_perl->Inomemok;
11803 PL_an = proto_perl->Ian;
11804 PL_evalseq = proto_perl->Ievalseq;
11805 PL_origenviron = proto_perl->Iorigenviron; /* XXX not quite right */
11806 PL_origalen = proto_perl->Iorigalen;
11807 PL_pidstatus = newHV(); /* XXX flag for cloning? */
11808 PL_osname = SAVEPV(proto_perl->Iosname);
11809 PL_sh_path_compat = proto_perl->Ish_path_compat; /* XXX never deallocated */
11810 PL_sighandlerp = proto_perl->Isighandlerp;
11813 PL_runops = proto_perl->Irunops;
11815 Copy(proto_perl->Itokenbuf, PL_tokenbuf, 256, char);
11818 PL_cshlen = proto_perl->Icshlen;
11819 PL_cshname = proto_perl->Icshname; /* XXX never deallocated */
11822 PL_lex_state = proto_perl->Ilex_state;
11823 PL_lex_defer = proto_perl->Ilex_defer;
11824 PL_lex_expect = proto_perl->Ilex_expect;
11825 PL_lex_formbrack = proto_perl->Ilex_formbrack;
11826 PL_lex_dojoin = proto_perl->Ilex_dojoin;
11827 PL_lex_starts = proto_perl->Ilex_starts;
11828 PL_lex_stuff = sv_dup_inc(proto_perl->Ilex_stuff, param);
11829 PL_lex_repl = sv_dup_inc(proto_perl->Ilex_repl, param);
11830 PL_lex_op = proto_perl->Ilex_op;
11831 PL_lex_inpat = proto_perl->Ilex_inpat;
11832 PL_lex_inwhat = proto_perl->Ilex_inwhat;
11833 PL_lex_brackets = proto_perl->Ilex_brackets;
11834 i = (PL_lex_brackets < 120 ? 120 : PL_lex_brackets);
11835 PL_lex_brackstack = SAVEPVN(proto_perl->Ilex_brackstack,i);
11836 PL_lex_casemods = proto_perl->Ilex_casemods;
11837 i = (PL_lex_casemods < 12 ? 12 : PL_lex_casemods);
11838 PL_lex_casestack = SAVEPVN(proto_perl->Ilex_casestack,i);
11840 Copy(proto_perl->Inextval, PL_nextval, 5, YYSTYPE);
11841 Copy(proto_perl->Inexttype, PL_nexttype, 5, I32);
11842 PL_nexttoke = proto_perl->Inexttoke;
11844 /* XXX This is probably masking the deeper issue of why
11845 * SvANY(proto_perl->Ilinestr) can be NULL at this point. For test case:
11846 * http://archive.develooper.com/perl5-porters%40perl.org/msg83298.html
11847 * (A little debugging with a watchpoint on it may help.)
11849 if (SvANY(proto_perl->Ilinestr)) {
11850 PL_linestr = sv_dup_inc(proto_perl->Ilinestr, param);
11851 i = proto_perl->Ibufptr - SvPVX(proto_perl->Ilinestr);
11852 PL_bufptr = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
11853 i = proto_perl->Ioldbufptr - SvPVX(proto_perl->Ilinestr);
11854 PL_oldbufptr = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
11855 i = proto_perl->Ioldoldbufptr - SvPVX(proto_perl->Ilinestr);
11856 PL_oldoldbufptr = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
11857 i = proto_perl->Ilinestart - SvPVX(proto_perl->Ilinestr);
11858 PL_linestart = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
11861 PL_linestr = NEWSV(65,79);
11862 sv_upgrade(PL_linestr,SVt_PVIV);
11863 sv_setpvn(PL_linestr,"",0);
11864 PL_bufptr = PL_oldbufptr = PL_oldoldbufptr = PL_linestart = SvPVX(PL_linestr);
11866 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
11867 PL_pending_ident = proto_perl->Ipending_ident;
11868 PL_sublex_info = proto_perl->Isublex_info; /* XXX not quite right */
11870 PL_expect = proto_perl->Iexpect;
11872 PL_multi_start = proto_perl->Imulti_start;
11873 PL_multi_end = proto_perl->Imulti_end;
11874 PL_multi_open = proto_perl->Imulti_open;
11875 PL_multi_close = proto_perl->Imulti_close;
11877 PL_error_count = proto_perl->Ierror_count;
11878 PL_subline = proto_perl->Isubline;
11879 PL_subname = sv_dup_inc(proto_perl->Isubname, param);
11881 /* XXX See comment on SvANY(proto_perl->Ilinestr) above */
11882 if (SvANY(proto_perl->Ilinestr)) {
11883 i = proto_perl->Ilast_uni - SvPVX(proto_perl->Ilinestr);
11884 PL_last_uni = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
11885 i = proto_perl->Ilast_lop - SvPVX(proto_perl->Ilinestr);
11886 PL_last_lop = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
11887 PL_last_lop_op = proto_perl->Ilast_lop_op;
11890 PL_last_uni = SvPVX(PL_linestr);
11891 PL_last_lop = SvPVX(PL_linestr);
11892 PL_last_lop_op = 0;
11894 PL_in_my = proto_perl->Iin_my;
11895 PL_in_my_stash = hv_dup(proto_perl->Iin_my_stash, param);
11897 PL_cryptseen = proto_perl->Icryptseen;
11900 PL_hints = proto_perl->Ihints;
11902 PL_amagic_generation = proto_perl->Iamagic_generation;
11904 #ifdef USE_LOCALE_COLLATE
11905 PL_collation_ix = proto_perl->Icollation_ix;
11906 PL_collation_name = SAVEPV(proto_perl->Icollation_name);
11907 PL_collation_standard = proto_perl->Icollation_standard;
11908 PL_collxfrm_base = proto_perl->Icollxfrm_base;
11909 PL_collxfrm_mult = proto_perl->Icollxfrm_mult;
11910 #endif /* USE_LOCALE_COLLATE */
11912 #ifdef USE_LOCALE_NUMERIC
11913 PL_numeric_name = SAVEPV(proto_perl->Inumeric_name);
11914 PL_numeric_standard = proto_perl->Inumeric_standard;
11915 PL_numeric_local = proto_perl->Inumeric_local;
11916 PL_numeric_radix_sv = sv_dup_inc(proto_perl->Inumeric_radix_sv, param);
11917 #endif /* !USE_LOCALE_NUMERIC */
11919 /* utf8 character classes */
11920 PL_utf8_alnum = sv_dup_inc(proto_perl->Iutf8_alnum, param);
11921 PL_utf8_alnumc = sv_dup_inc(proto_perl->Iutf8_alnumc, param);
11922 PL_utf8_ascii = sv_dup_inc(proto_perl->Iutf8_ascii, param);
11923 PL_utf8_alpha = sv_dup_inc(proto_perl->Iutf8_alpha, param);
11924 PL_utf8_space = sv_dup_inc(proto_perl->Iutf8_space, param);
11925 PL_utf8_cntrl = sv_dup_inc(proto_perl->Iutf8_cntrl, param);
11926 PL_utf8_graph = sv_dup_inc(proto_perl->Iutf8_graph, param);
11927 PL_utf8_digit = sv_dup_inc(proto_perl->Iutf8_digit, param);
11928 PL_utf8_upper = sv_dup_inc(proto_perl->Iutf8_upper, param);
11929 PL_utf8_lower = sv_dup_inc(proto_perl->Iutf8_lower, param);
11930 PL_utf8_print = sv_dup_inc(proto_perl->Iutf8_print, param);
11931 PL_utf8_punct = sv_dup_inc(proto_perl->Iutf8_punct, param);
11932 PL_utf8_xdigit = sv_dup_inc(proto_perl->Iutf8_xdigit, param);
11933 PL_utf8_mark = sv_dup_inc(proto_perl->Iutf8_mark, param);
11934 PL_utf8_toupper = sv_dup_inc(proto_perl->Iutf8_toupper, param);
11935 PL_utf8_totitle = sv_dup_inc(proto_perl->Iutf8_totitle, param);
11936 PL_utf8_tolower = sv_dup_inc(proto_perl->Iutf8_tolower, param);
11937 PL_utf8_tofold = sv_dup_inc(proto_perl->Iutf8_tofold, param);
11938 PL_utf8_idstart = sv_dup_inc(proto_perl->Iutf8_idstart, param);
11939 PL_utf8_idcont = sv_dup_inc(proto_perl->Iutf8_idcont, param);
11941 /* Did the locale setup indicate UTF-8? */
11942 PL_utf8locale = proto_perl->Iutf8locale;
11943 /* Unicode features (see perlrun/-C) */
11944 PL_unicode = proto_perl->Iunicode;
11946 /* Pre-5.8 signals control */
11947 PL_signals = proto_perl->Isignals;
11949 /* times() ticks per second */
11950 PL_clocktick = proto_perl->Iclocktick;
11952 /* Recursion stopper for PerlIO_find_layer */
11953 PL_in_load_module = proto_perl->Iin_load_module;
11955 /* sort() routine */
11956 PL_sort_RealCmp = proto_perl->Isort_RealCmp;
11958 /* Not really needed/useful since the reenrant_retint is "volatile",
11959 * but do it for consistency's sake. */
11960 PL_reentrant_retint = proto_perl->Ireentrant_retint;
11962 /* Hooks to shared SVs and locks. */
11963 PL_sharehook = proto_perl->Isharehook;
11964 PL_lockhook = proto_perl->Ilockhook;
11965 PL_unlockhook = proto_perl->Iunlockhook;
11966 PL_threadhook = proto_perl->Ithreadhook;
11968 PL_runops_std = proto_perl->Irunops_std;
11969 PL_runops_dbg = proto_perl->Irunops_dbg;
11971 #ifdef THREADS_HAVE_PIDS
11972 PL_ppid = proto_perl->Ippid;
11976 PL_last_swash_hv = Nullhv; /* reinits on demand */
11977 PL_last_swash_klen = 0;
11978 PL_last_swash_key[0]= '\0';
11979 PL_last_swash_tmps = (U8*)NULL;
11980 PL_last_swash_slen = 0;
11982 PL_glob_index = proto_perl->Iglob_index;
11983 PL_srand_called = proto_perl->Isrand_called;
11984 PL_hash_seed = proto_perl->Ihash_seed;
11985 PL_rehash_seed = proto_perl->Irehash_seed;
11986 PL_uudmap['M'] = 0; /* reinits on demand */
11987 PL_bitcount = Nullch; /* reinits on demand */
11989 if (proto_perl->Ipsig_pend) {
11990 Newz(0, PL_psig_pend, SIG_SIZE, int);
11993 PL_psig_pend = (int*)NULL;
11996 if (proto_perl->Ipsig_ptr) {
11997 Newz(0, PL_psig_ptr, SIG_SIZE, SV*);
11998 Newz(0, PL_psig_name, SIG_SIZE, SV*);
11999 for (i = 1; i < SIG_SIZE; i++) {
12000 PL_psig_ptr[i] = sv_dup_inc(proto_perl->Ipsig_ptr[i], param);
12001 PL_psig_name[i] = sv_dup_inc(proto_perl->Ipsig_name[i], param);
12005 PL_psig_ptr = (SV**)NULL;
12006 PL_psig_name = (SV**)NULL;
12009 /* thrdvar.h stuff */
12011 if (flags & CLONEf_COPY_STACKS) {
12012 /* next allocation will be PL_tmps_stack[PL_tmps_ix+1] */
12013 PL_tmps_ix = proto_perl->Ttmps_ix;
12014 PL_tmps_max = proto_perl->Ttmps_max;
12015 PL_tmps_floor = proto_perl->Ttmps_floor;
12016 Newz(50, PL_tmps_stack, PL_tmps_max, SV*);
12018 while (i <= PL_tmps_ix) {
12019 PL_tmps_stack[i] = sv_dup_inc(proto_perl->Ttmps_stack[i], param);
12023 /* next PUSHMARK() sets *(PL_markstack_ptr+1) */
12024 i = proto_perl->Tmarkstack_max - proto_perl->Tmarkstack;
12025 Newz(54, PL_markstack, i, I32);
12026 PL_markstack_max = PL_markstack + (proto_perl->Tmarkstack_max
12027 - proto_perl->Tmarkstack);
12028 PL_markstack_ptr = PL_markstack + (proto_perl->Tmarkstack_ptr
12029 - proto_perl->Tmarkstack);
12030 Copy(proto_perl->Tmarkstack, PL_markstack,
12031 PL_markstack_ptr - PL_markstack + 1, I32);
12033 /* next push_scope()/ENTER sets PL_scopestack[PL_scopestack_ix]
12034 * NOTE: unlike the others! */
12035 PL_scopestack_ix = proto_perl->Tscopestack_ix;
12036 PL_scopestack_max = proto_perl->Tscopestack_max;
12037 Newz(54, PL_scopestack, PL_scopestack_max, I32);
12038 Copy(proto_perl->Tscopestack, PL_scopestack, PL_scopestack_ix, I32);
12040 /* next push_return() sets PL_retstack[PL_retstack_ix]
12041 * NOTE: unlike the others! */
12042 PL_retstack_ix = proto_perl->Tretstack_ix;
12043 PL_retstack_max = proto_perl->Tretstack_max;
12044 Newz(54, PL_retstack, PL_retstack_max, OP*);
12045 Copy(proto_perl->Tretstack, PL_retstack, PL_retstack_ix, OP*);
12047 /* NOTE: si_dup() looks at PL_markstack */
12048 PL_curstackinfo = si_dup(proto_perl->Tcurstackinfo, param);
12050 /* PL_curstack = PL_curstackinfo->si_stack; */
12051 PL_curstack = av_dup(proto_perl->Tcurstack, param);
12052 PL_mainstack = av_dup(proto_perl->Tmainstack, param);
12054 /* next PUSHs() etc. set *(PL_stack_sp+1) */
12055 PL_stack_base = AvARRAY(PL_curstack);
12056 PL_stack_sp = PL_stack_base + (proto_perl->Tstack_sp
12057 - proto_perl->Tstack_base);
12058 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
12060 /* next SSPUSHFOO() sets PL_savestack[PL_savestack_ix]
12061 * NOTE: unlike the others! */
12062 PL_savestack_ix = proto_perl->Tsavestack_ix;
12063 PL_savestack_max = proto_perl->Tsavestack_max;
12064 /*Newz(54, PL_savestack, PL_savestack_max, ANY);*/
12065 PL_savestack = ss_dup(proto_perl, param);
12069 ENTER; /* perl_destruct() wants to LEAVE; */
12072 PL_start_env = proto_perl->Tstart_env; /* XXXXXX */
12073 PL_top_env = &PL_start_env;
12075 PL_op = proto_perl->Top;
12078 PL_Xpv = (XPV*)NULL;
12079 PL_na = proto_perl->Tna;
12081 PL_statbuf = proto_perl->Tstatbuf;
12082 PL_statcache = proto_perl->Tstatcache;
12083 PL_statgv = gv_dup(proto_perl->Tstatgv, param);
12084 PL_statname = sv_dup_inc(proto_perl->Tstatname, param);
12086 PL_timesbuf = proto_perl->Ttimesbuf;
12089 PL_tainted = proto_perl->Ttainted;
12090 PL_curpm = proto_perl->Tcurpm; /* XXX No PMOP ref count */
12091 PL_rs = sv_dup_inc(proto_perl->Trs, param);
12092 PL_last_in_gv = gv_dup(proto_perl->Tlast_in_gv, param);
12093 PL_ofs_sv = sv_dup_inc(proto_perl->Tofs_sv, param);
12094 PL_defoutgv = gv_dup_inc(proto_perl->Tdefoutgv, param);
12095 PL_chopset = proto_perl->Tchopset; /* XXX never deallocated */
12096 PL_toptarget = sv_dup_inc(proto_perl->Ttoptarget, param);
12097 PL_bodytarget = sv_dup_inc(proto_perl->Tbodytarget, param);
12098 PL_formtarget = sv_dup(proto_perl->Tformtarget, param);
12100 PL_restartop = proto_perl->Trestartop;
12101 PL_in_eval = proto_perl->Tin_eval;
12102 PL_delaymagic = proto_perl->Tdelaymagic;
12103 PL_dirty = proto_perl->Tdirty;
12104 PL_localizing = proto_perl->Tlocalizing;
12106 #ifdef PERL_FLEXIBLE_EXCEPTIONS
12107 PL_protect = proto_perl->Tprotect;
12109 PL_errors = sv_dup_inc(proto_perl->Terrors, param);
12110 PL_hv_fetch_ent_mh = Nullhe;
12111 PL_modcount = proto_perl->Tmodcount;
12112 PL_lastgotoprobe = Nullop;
12113 PL_dumpindent = proto_perl->Tdumpindent;
12115 PL_sortcop = (OP*)any_dup(proto_perl->Tsortcop, proto_perl);
12116 PL_sortstash = hv_dup(proto_perl->Tsortstash, param);
12117 PL_firstgv = gv_dup(proto_perl->Tfirstgv, param);
12118 PL_secondgv = gv_dup(proto_perl->Tsecondgv, param);
12119 PL_sortcxix = proto_perl->Tsortcxix;
12120 PL_efloatbuf = Nullch; /* reinits on demand */
12121 PL_efloatsize = 0; /* reinits on demand */
12125 PL_screamfirst = NULL;
12126 PL_screamnext = NULL;
12127 PL_maxscream = -1; /* reinits on demand */
12128 PL_lastscream = Nullsv;
12130 PL_watchaddr = NULL;
12131 PL_watchok = Nullch;
12133 PL_regdummy = proto_perl->Tregdummy;
12134 PL_regprecomp = Nullch;
12137 PL_colorset = 0; /* reinits PL_colors[] */
12138 /*PL_colors[6] = {0,0,0,0,0,0};*/
12139 PL_reginput = Nullch;
12140 PL_regbol = Nullch;
12141 PL_regeol = Nullch;
12142 PL_regstartp = (I32*)NULL;
12143 PL_regendp = (I32*)NULL;
12144 PL_reglastparen = (U32*)NULL;
12145 PL_reglastcloseparen = (U32*)NULL;
12146 PL_regtill = Nullch;
12147 PL_reg_start_tmp = (char**)NULL;
12148 PL_reg_start_tmpl = 0;
12149 PL_regdata = (struct reg_data*)NULL;
12152 PL_reg_eval_set = 0;
12154 PL_regprogram = (regnode*)NULL;
12156 PL_regcc = (CURCUR*)NULL;
12157 PL_reg_call_cc = (struct re_cc_state*)NULL;
12158 PL_reg_re = (regexp*)NULL;
12159 PL_reg_ganch = Nullch;
12160 PL_reg_sv = Nullsv;
12161 PL_reg_match_utf8 = FALSE;
12162 PL_reg_magic = (MAGIC*)NULL;
12164 PL_reg_oldcurpm = (PMOP*)NULL;
12165 PL_reg_curpm = (PMOP*)NULL;
12166 PL_reg_oldsaved = Nullch;
12167 PL_reg_oldsavedlen = 0;
12168 #ifdef PERL_COPY_ON_WRITE
12171 PL_reg_maxiter = 0;
12172 PL_reg_leftiter = 0;
12173 PL_reg_poscache = Nullch;
12174 PL_reg_poscache_size= 0;
12176 /* RE engine - function pointers */
12177 PL_regcompp = proto_perl->Tregcompp;
12178 PL_regexecp = proto_perl->Tregexecp;
12179 PL_regint_start = proto_perl->Tregint_start;
12180 PL_regint_string = proto_perl->Tregint_string;
12181 PL_regfree = proto_perl->Tregfree;
12183 PL_reginterp_cnt = 0;
12184 PL_reg_starttry = 0;
12186 /* Pluggable optimizer */
12187 PL_peepp = proto_perl->Tpeepp;
12189 PL_stashcache = newHV();
12191 if (!(flags & CLONEf_KEEP_PTR_TABLE)) {
12192 ptr_table_free(PL_ptr_table);
12193 PL_ptr_table = NULL;
12196 /* Call the ->CLONE method, if it exists, for each of the stashes
12197 identified by sv_dup() above.
12199 while(av_len(param->stashes) != -1) {
12200 HV* stash = (HV*) av_shift(param->stashes);
12201 GV* cloner = gv_fetchmethod_autoload(stash, "CLONE", 0);
12202 if (cloner && GvCV(cloner)) {
12207 XPUSHs(sv_2mortal(newSVpv(HvNAME(stash), 0)));
12209 call_sv((SV*)GvCV(cloner), G_DISCARD);
12215 SvREFCNT_dec(param->stashes);
12220 #endif /* USE_ITHREADS */
12223 =head1 Unicode Support
12225 =for apidoc sv_recode_to_utf8
12227 The encoding is assumed to be an Encode object, on entry the PV
12228 of the sv is assumed to be octets in that encoding, and the sv
12229 will be converted into Unicode (and UTF-8).
12231 If the sv already is UTF-8 (or if it is not POK), or if the encoding
12232 is not a reference, nothing is done to the sv. If the encoding is not
12233 an C<Encode::XS> Encoding object, bad things will happen.
12234 (See F<lib/encoding.pm> and L<Encode>).
12236 The PV of the sv is returned.
12241 Perl_sv_recode_to_utf8(pTHX_ SV *sv, SV *encoding)
12243 if (SvPOK(sv) && !SvUTF8(sv) && !IN_BYTES && SvROK(encoding)) {
12257 Passing sv_yes is wrong - it needs to be or'ed set of constants
12258 for Encode::XS, while UTf-8 decode (currently) assumes a true value means
12259 remove converted chars from source.
12261 Both will default the value - let them.
12263 XPUSHs(&PL_sv_yes);
12266 call_method("decode", G_SCALAR);
12270 s = SvPV(uni, len);
12271 if (s != SvPVX(sv)) {
12272 SvGROW(sv, len + 1);
12273 Move(s, SvPVX(sv), len, char);
12274 SvCUR_set(sv, len);
12275 SvPVX(sv)[len] = 0;
12285 =for apidoc sv_cat_decode
12287 The encoding is assumed to be an Encode object, the PV of the ssv is
12288 assumed to be octets in that encoding and decoding the input starts
12289 from the position which (PV + *offset) pointed to. The dsv will be
12290 concatenated the decoded UTF-8 string from ssv. Decoding will terminate
12291 when the string tstr appears in decoding output or the input ends on
12292 the PV of the ssv. The value which the offset points will be modified
12293 to the last input position on the ssv.
12295 Returns TRUE if the terminator was found, else returns FALSE.
12300 Perl_sv_cat_decode(pTHX_ SV *dsv, SV *encoding,
12301 SV *ssv, int *offset, char *tstr, int tlen)
12304 if (SvPOK(ssv) && SvPOK(dsv) && SvROK(encoding) && offset) {
12315 XPUSHs(offsv = sv_2mortal(newSViv(*offset)));
12316 XPUSHs(sv_2mortal(newSVpvn(tstr, tlen)));
12318 call_method("cat_decode", G_SCALAR);
12320 ret = SvTRUE(TOPs);
12321 *offset = SvIV(offsv);
12327 Perl_croak(aTHX_ "Invalid argument to sv_cat_decode");