3 * Copyright (c) 1991-2002, Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
8 * "I wonder what the Entish is for 'yes' and 'no'," he thought.
11 * This file contains the code that creates, manipulates and destroys
12 * scalar values (SVs). The other types (AV, HV, GV, etc.) reuse the
13 * structure of an SV, so their creation and destruction is handled
14 * here; higher-level functions are in av.c, hv.c, and so on. Opcode
15 * level functions (eg. substr, split, join) for each of the types are
25 #define SV_CHECK_THINKFIRST(sv) if (SvTHINKFIRST(sv)) sv_force_normal(sv)
28 /* ============================================================================
30 =head1 Allocation and deallocation of SVs.
32 An SV (or AV, HV, etc.) is allocated in two parts: the head (struct sv,
33 av, hv...) contains type and reference count information, as well as a
34 pointer to the body (struct xrv, xpv, xpviv...), which contains fields
35 specific to each type.
37 Normally, this allocation is done using arenas, which are approximately
38 1K chunks of memory parcelled up into N heads or bodies. The first slot
39 in each arena is reserved, and is used to hold a link to the next arena.
40 In the case of heads, the unused first slot also contains some flags and
41 a note of the number of slots. Snaked through each arena chain is a
42 linked list of free items; when this becomes empty, an extra arena is
43 allocated and divided up into N items which are threaded into the free
46 The following global variables are associated with arenas:
48 PL_sv_arenaroot pointer to list of SV arenas
49 PL_sv_root pointer to list of free SV structures
51 PL_foo_arenaroot pointer to list of foo arenas,
52 PL_foo_root pointer to list of free foo bodies
53 ... for foo in xiv, xnv, xrv, xpv etc.
55 Note that some of the larger and more rarely used body types (eg xpvio)
56 are not allocated using arenas, but are instead just malloc()/free()ed as
57 required. Also, if PURIFY is defined, arenas are abandoned altogether,
58 with all items individually malloc()ed. In addition, a few SV heads are
59 not allocated from an arena, but are instead directly created as static
60 or auto variables, eg PL_sv_undef.
62 The SV arena serves the secondary purpose of allowing still-live SVs
63 to be located and destroyed during final cleanup.
65 At the lowest level, the macros new_SV() and del_SV() grab and free
66 an SV head. (If debugging with -DD, del_SV() calls the function S_del_sv()
67 to return the SV to the free list with error checking.) new_SV() calls
68 more_sv() / sv_add_arena() to add an extra arena if the free list is empty.
69 SVs in the free list have their SvTYPE field set to all ones.
71 Similarly, there are macros new_XIV()/del_XIV(), new_XNV()/del_XNV() etc
72 that allocate and return individual body types. Normally these are mapped
73 to the arena-manipulating functions new_xiv()/del_xiv() etc, but may be
74 instead mapped directly to malloc()/free() if PURIFY is defined. The
75 new/del functions remove from, or add to, the appropriate PL_foo_root
76 list, and call more_xiv() etc to add a new arena if the list is empty.
78 At the time of very final cleanup, sv_free_arenas() is called from
79 perl_destruct() to physically free all the arenas allocated since the
80 start of the interpreter. Note that this also clears PL_he_arenaroot,
81 which is otherwise dealt with in hv.c.
83 Manipulation of any of the PL_*root pointers is protected by enclosing
84 LOCK_SV_MUTEX; ... UNLOCK_SV_MUTEX calls which should Do the Right Thing
85 if threads are enabled.
87 The function visit() scans the SV arenas list, and calls a specified
88 function for each SV it finds which is still live - ie which has an SvTYPE
89 other than all 1's, and a non-zero SvREFCNT. visit() is used by the
90 following functions (specified as [function that calls visit()] / [function
91 called by visit() for each SV]):
93 sv_report_used() / do_report_used()
94 dump all remaining SVs (debugging aid)
96 sv_clean_objs() / do_clean_objs(),do_clean_named_objs()
97 Attempt to free all objects pointed to by RVs,
98 and, unless DISABLE_DESTRUCTOR_KLUDGE is defined,
99 try to do the same for all objects indirectly
100 referenced by typeglobs too. Called once from
101 perl_destruct(), prior to calling sv_clean_all()
104 sv_clean_all() / do_clean_all()
105 SvREFCNT_dec(sv) each remaining SV, possibly
106 triggering an sv_free(). It also sets the
107 SVf_BREAK flag on the SV to indicate that the
108 refcnt has been artificially lowered, and thus
109 stopping sv_free() from giving spurious warnings
110 about SVs which unexpectedly have a refcnt
111 of zero. called repeatedly from perl_destruct()
112 until there are no SVs left.
116 Private API to rest of sv.c
120 new_XIV(), del_XIV(),
121 new_XNV(), del_XNV(),
126 sv_report_used(), sv_clean_objs(), sv_clean_all(), sv_free_arenas()
131 ============================================================================ */
136 * "A time to plant, and a time to uproot what was planted..."
139 #define plant_SV(p) \
141 SvANY(p) = (void *)PL_sv_root; \
142 SvFLAGS(p) = SVTYPEMASK; \
147 /* sv_mutex must be held while calling uproot_SV() */
148 #define uproot_SV(p) \
151 PL_sv_root = (SV*)SvANY(p); \
156 /* new_SV(): return a new, empty SV head */
172 /* del_SV(): return an empty SV head to the free list */
187 S_del_sv(pTHX_ SV *p)
194 for (sva = PL_sv_arenaroot; sva; sva = (SV *) SvANY(sva)) {
196 svend = &sva[SvREFCNT(sva)];
197 if (p >= sv && p < svend)
201 if (ckWARN_d(WARN_INTERNAL))
202 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
203 "Attempt to free non-arena SV: 0x%"UVxf,
211 #else /* ! DEBUGGING */
213 #define del_SV(p) plant_SV(p)
215 #endif /* DEBUGGING */
219 =head1 SV Manipulation Functions
221 =for apidoc sv_add_arena
223 Given a chunk of memory, link it to the head of the list of arenas,
224 and split it into a list of free SVs.
230 Perl_sv_add_arena(pTHX_ char *ptr, U32 size, U32 flags)
235 Zero(ptr, size, char);
237 /* The first SV in an arena isn't an SV. */
238 SvANY(sva) = (void *) PL_sv_arenaroot; /* ptr to next arena */
239 SvREFCNT(sva) = size / sizeof(SV); /* number of SV slots */
240 SvFLAGS(sva) = flags; /* FAKE if not to be freed */
242 PL_sv_arenaroot = sva;
243 PL_sv_root = sva + 1;
245 svend = &sva[SvREFCNT(sva) - 1];
248 SvANY(sv) = (void *)(SV*)(sv + 1);
249 SvFLAGS(sv) = SVTYPEMASK;
253 SvFLAGS(sv) = SVTYPEMASK;
256 /* make some more SVs by adding another arena */
258 /* sv_mutex must be held while calling more_sv() */
265 sv_add_arena(PL_nice_chunk, PL_nice_chunk_size, 0);
266 PL_nice_chunk = Nullch;
267 PL_nice_chunk_size = 0;
270 char *chunk; /* must use New here to match call to */
271 New(704,chunk,1008,char); /* Safefree() in sv_free_arenas() */
272 sv_add_arena(chunk, 1008, 0);
278 /* visit(): call the named function for each non-free SV in the arenas. */
281 S_visit(pTHX_ SVFUNC_t f)
288 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
289 svend = &sva[SvREFCNT(sva)];
290 for (sv = sva + 1; sv < svend; ++sv) {
291 if (SvTYPE(sv) != SVTYPEMASK && SvREFCNT(sv)) {
302 /* called by sv_report_used() for each live SV */
305 do_report_used(pTHX_ SV *sv)
307 if (SvTYPE(sv) != SVTYPEMASK) {
308 PerlIO_printf(Perl_debug_log, "****\n");
315 =for apidoc sv_report_used
317 Dump the contents of all SVs not yet freed. (Debugging aid).
323 Perl_sv_report_used(pTHX)
326 visit(do_report_used);
330 /* called by sv_clean_objs() for each live SV */
333 do_clean_objs(pTHX_ SV *sv)
337 if (SvROK(sv) && SvOBJECT(rv = SvRV(sv))) {
338 DEBUG_D((PerlIO_printf(Perl_debug_log, "Cleaning object ref:\n "), sv_dump(sv)));
350 /* XXX Might want to check arrays, etc. */
353 /* called by sv_clean_objs() for each live SV */
355 #ifndef DISABLE_DESTRUCTOR_KLUDGE
357 do_clean_named_objs(pTHX_ SV *sv)
359 if (SvTYPE(sv) == SVt_PVGV && GvGP(sv)) {
360 if ( SvOBJECT(GvSV(sv)) ||
361 (GvAV(sv) && SvOBJECT(GvAV(sv))) ||
362 (GvHV(sv) && SvOBJECT(GvHV(sv))) ||
363 (GvIO(sv) && SvOBJECT(GvIO(sv))) ||
364 (GvCV(sv) && SvOBJECT(GvCV(sv))) )
366 DEBUG_D((PerlIO_printf(Perl_debug_log, "Cleaning named glob object:\n "), sv_dump(sv)));
374 =for apidoc sv_clean_objs
376 Attempt to destroy all objects not yet freed
382 Perl_sv_clean_objs(pTHX)
384 PL_in_clean_objs = TRUE;
385 visit(do_clean_objs);
386 #ifndef DISABLE_DESTRUCTOR_KLUDGE
387 /* some barnacles may yet remain, clinging to typeglobs */
388 visit(do_clean_named_objs);
390 PL_in_clean_objs = FALSE;
393 /* called by sv_clean_all() for each live SV */
396 do_clean_all(pTHX_ SV *sv)
398 DEBUG_D((PerlIO_printf(Perl_debug_log, "Cleaning loops: SV at 0x%"UVxf"\n", PTR2UV(sv)) ));
399 SvFLAGS(sv) |= SVf_BREAK;
404 =for apidoc sv_clean_all
406 Decrement the refcnt of each remaining SV, possibly triggering a
407 cleanup. This function may have to be called multiple times to free
408 SVs which are in complex self-referential hierarchies.
414 Perl_sv_clean_all(pTHX)
417 PL_in_clean_all = TRUE;
418 cleaned = visit(do_clean_all);
419 PL_in_clean_all = FALSE;
424 =for apidoc sv_free_arenas
426 Deallocate the memory used by all arenas. Note that all the individual SV
427 heads and bodies within the arenas must already have been freed.
433 Perl_sv_free_arenas(pTHX)
437 XPV *arena, *arenanext;
439 /* Free arenas here, but be careful about fake ones. (We assume
440 contiguity of the fake ones with the corresponding real ones.) */
442 for (sva = PL_sv_arenaroot; sva; sva = svanext) {
443 svanext = (SV*) SvANY(sva);
444 while (svanext && SvFAKE(svanext))
445 svanext = (SV*) SvANY(svanext);
448 Safefree((void *)sva);
451 for (arena = PL_xiv_arenaroot; arena; arena = arenanext) {
452 arenanext = (XPV*)arena->xpv_pv;
455 PL_xiv_arenaroot = 0;
457 for (arena = PL_xnv_arenaroot; arena; arena = arenanext) {
458 arenanext = (XPV*)arena->xpv_pv;
461 PL_xnv_arenaroot = 0;
463 for (arena = PL_xrv_arenaroot; arena; arena = arenanext) {
464 arenanext = (XPV*)arena->xpv_pv;
467 PL_xrv_arenaroot = 0;
469 for (arena = PL_xpv_arenaroot; arena; arena = arenanext) {
470 arenanext = (XPV*)arena->xpv_pv;
473 PL_xpv_arenaroot = 0;
475 for (arena = (XPV*)PL_xpviv_arenaroot; arena; arena = arenanext) {
476 arenanext = (XPV*)arena->xpv_pv;
479 PL_xpviv_arenaroot = 0;
481 for (arena = (XPV*)PL_xpvnv_arenaroot; arena; arena = arenanext) {
482 arenanext = (XPV*)arena->xpv_pv;
485 PL_xpvnv_arenaroot = 0;
487 for (arena = (XPV*)PL_xpvcv_arenaroot; arena; arena = arenanext) {
488 arenanext = (XPV*)arena->xpv_pv;
491 PL_xpvcv_arenaroot = 0;
493 for (arena = (XPV*)PL_xpvav_arenaroot; arena; arena = arenanext) {
494 arenanext = (XPV*)arena->xpv_pv;
497 PL_xpvav_arenaroot = 0;
499 for (arena = (XPV*)PL_xpvhv_arenaroot; arena; arena = arenanext) {
500 arenanext = (XPV*)arena->xpv_pv;
503 PL_xpvhv_arenaroot = 0;
505 for (arena = (XPV*)PL_xpvmg_arenaroot; arena; arena = arenanext) {
506 arenanext = (XPV*)arena->xpv_pv;
509 PL_xpvmg_arenaroot = 0;
511 for (arena = (XPV*)PL_xpvlv_arenaroot; arena; arena = arenanext) {
512 arenanext = (XPV*)arena->xpv_pv;
515 PL_xpvlv_arenaroot = 0;
517 for (arena = (XPV*)PL_xpvbm_arenaroot; arena; arena = arenanext) {
518 arenanext = (XPV*)arena->xpv_pv;
521 PL_xpvbm_arenaroot = 0;
523 for (arena = (XPV*)PL_he_arenaroot; arena; arena = arenanext) {
524 arenanext = (XPV*)arena->xpv_pv;
530 Safefree(PL_nice_chunk);
531 PL_nice_chunk = Nullch;
532 PL_nice_chunk_size = 0;
538 =for apidoc report_uninit
540 Print appropriate "Use of uninitialized variable" warning
546 Perl_report_uninit(pTHX)
549 Perl_warner(aTHX_ packWARN(WARN_UNINITIALIZED), PL_warn_uninit,
550 " in ", OP_DESC(PL_op));
552 Perl_warner(aTHX_ packWARN(WARN_UNINITIALIZED), PL_warn_uninit, "", "");
555 /* grab a new IV body from the free list, allocating more if necessary */
566 * See comment in more_xiv() -- RAM.
568 PL_xiv_root = *(IV**)xiv;
570 return (XPVIV*)((char*)xiv - STRUCT_OFFSET(XPVIV, xiv_iv));
573 /* return an IV body to the free list */
576 S_del_xiv(pTHX_ XPVIV *p)
578 IV* xiv = (IV*)((char*)(p) + STRUCT_OFFSET(XPVIV, xiv_iv));
580 *(IV**)xiv = PL_xiv_root;
585 /* allocate another arena's worth of IV bodies */
593 New(705, ptr, 1008/sizeof(XPV), XPV);
594 ptr->xpv_pv = (char*)PL_xiv_arenaroot; /* linked list of xiv arenas */
595 PL_xiv_arenaroot = ptr; /* to keep Purify happy */
598 xivend = &xiv[1008 / sizeof(IV) - 1];
599 xiv += (sizeof(XPV) - 1) / sizeof(IV) + 1; /* fudge by size of XPV */
601 while (xiv < xivend) {
602 *(IV**)xiv = (IV *)(xiv + 1);
608 /* grab a new NV body from the free list, allocating more if necessary */
618 PL_xnv_root = *(NV**)xnv;
620 return (XPVNV*)((char*)xnv - STRUCT_OFFSET(XPVNV, xnv_nv));
623 /* return an NV body to the free list */
626 S_del_xnv(pTHX_ XPVNV *p)
628 NV* xnv = (NV*)((char*)(p) + STRUCT_OFFSET(XPVNV, xnv_nv));
630 *(NV**)xnv = PL_xnv_root;
635 /* allocate another arena's worth of NV bodies */
643 New(711, ptr, 1008/sizeof(XPV), XPV);
644 ptr->xpv_pv = (char*)PL_xnv_arenaroot;
645 PL_xnv_arenaroot = ptr;
648 xnvend = &xnv[1008 / sizeof(NV) - 1];
649 xnv += (sizeof(XPVIV) - 1) / sizeof(NV) + 1; /* fudge by sizeof XPVIV */
651 while (xnv < xnvend) {
652 *(NV**)xnv = (NV*)(xnv + 1);
658 /* grab a new struct xrv from the free list, allocating more if necessary */
668 PL_xrv_root = (XRV*)xrv->xrv_rv;
673 /* return a struct xrv to the free list */
676 S_del_xrv(pTHX_ XRV *p)
679 p->xrv_rv = (SV*)PL_xrv_root;
684 /* allocate another arena's worth of struct xrv */
690 register XRV* xrvend;
692 New(712, ptr, 1008/sizeof(XPV), XPV);
693 ptr->xpv_pv = (char*)PL_xrv_arenaroot;
694 PL_xrv_arenaroot = ptr;
697 xrvend = &xrv[1008 / sizeof(XRV) - 1];
698 xrv += (sizeof(XPV) - 1) / sizeof(XRV) + 1;
700 while (xrv < xrvend) {
701 xrv->xrv_rv = (SV*)(xrv + 1);
707 /* grab a new struct xpv from the free list, allocating more if necessary */
717 PL_xpv_root = (XPV*)xpv->xpv_pv;
722 /* return a struct xpv to the free list */
725 S_del_xpv(pTHX_ XPV *p)
728 p->xpv_pv = (char*)PL_xpv_root;
733 /* allocate another arena's worth of struct xpv */
739 register XPV* xpvend;
740 New(713, xpv, 1008/sizeof(XPV), XPV);
741 xpv->xpv_pv = (char*)PL_xpv_arenaroot;
742 PL_xpv_arenaroot = xpv;
744 xpvend = &xpv[1008 / sizeof(XPV) - 1];
746 while (xpv < xpvend) {
747 xpv->xpv_pv = (char*)(xpv + 1);
753 /* grab a new struct xpviv from the free list, allocating more if necessary */
762 xpviv = PL_xpviv_root;
763 PL_xpviv_root = (XPVIV*)xpviv->xpv_pv;
768 /* return a struct xpviv to the free list */
771 S_del_xpviv(pTHX_ XPVIV *p)
774 p->xpv_pv = (char*)PL_xpviv_root;
779 /* allocate another arena's worth of struct xpviv */
784 register XPVIV* xpviv;
785 register XPVIV* xpvivend;
786 New(714, xpviv, 1008/sizeof(XPVIV), XPVIV);
787 xpviv->xpv_pv = (char*)PL_xpviv_arenaroot;
788 PL_xpviv_arenaroot = xpviv;
790 xpvivend = &xpviv[1008 / sizeof(XPVIV) - 1];
791 PL_xpviv_root = ++xpviv;
792 while (xpviv < xpvivend) {
793 xpviv->xpv_pv = (char*)(xpviv + 1);
799 /* grab a new struct xpvnv from the free list, allocating more if necessary */
808 xpvnv = PL_xpvnv_root;
809 PL_xpvnv_root = (XPVNV*)xpvnv->xpv_pv;
814 /* return a struct xpvnv to the free list */
817 S_del_xpvnv(pTHX_ XPVNV *p)
820 p->xpv_pv = (char*)PL_xpvnv_root;
825 /* allocate another arena's worth of struct xpvnv */
830 register XPVNV* xpvnv;
831 register XPVNV* xpvnvend;
832 New(715, xpvnv, 1008/sizeof(XPVNV), XPVNV);
833 xpvnv->xpv_pv = (char*)PL_xpvnv_arenaroot;
834 PL_xpvnv_arenaroot = xpvnv;
836 xpvnvend = &xpvnv[1008 / sizeof(XPVNV) - 1];
837 PL_xpvnv_root = ++xpvnv;
838 while (xpvnv < xpvnvend) {
839 xpvnv->xpv_pv = (char*)(xpvnv + 1);
845 /* grab a new struct xpvcv from the free list, allocating more if necessary */
854 xpvcv = PL_xpvcv_root;
855 PL_xpvcv_root = (XPVCV*)xpvcv->xpv_pv;
860 /* return a struct xpvcv to the free list */
863 S_del_xpvcv(pTHX_ XPVCV *p)
866 p->xpv_pv = (char*)PL_xpvcv_root;
871 /* allocate another arena's worth of struct xpvcv */
876 register XPVCV* xpvcv;
877 register XPVCV* xpvcvend;
878 New(716, xpvcv, 1008/sizeof(XPVCV), XPVCV);
879 xpvcv->xpv_pv = (char*)PL_xpvcv_arenaroot;
880 PL_xpvcv_arenaroot = xpvcv;
882 xpvcvend = &xpvcv[1008 / sizeof(XPVCV) - 1];
883 PL_xpvcv_root = ++xpvcv;
884 while (xpvcv < xpvcvend) {
885 xpvcv->xpv_pv = (char*)(xpvcv + 1);
891 /* grab a new struct xpvav from the free list, allocating more if necessary */
900 xpvav = PL_xpvav_root;
901 PL_xpvav_root = (XPVAV*)xpvav->xav_array;
906 /* return a struct xpvav to the free list */
909 S_del_xpvav(pTHX_ XPVAV *p)
912 p->xav_array = (char*)PL_xpvav_root;
917 /* allocate another arena's worth of struct xpvav */
922 register XPVAV* xpvav;
923 register XPVAV* xpvavend;
924 New(717, xpvav, 1008/sizeof(XPVAV), XPVAV);
925 xpvav->xav_array = (char*)PL_xpvav_arenaroot;
926 PL_xpvav_arenaroot = xpvav;
928 xpvavend = &xpvav[1008 / sizeof(XPVAV) - 1];
929 PL_xpvav_root = ++xpvav;
930 while (xpvav < xpvavend) {
931 xpvav->xav_array = (char*)(xpvav + 1);
934 xpvav->xav_array = 0;
937 /* grab a new struct xpvhv from the free list, allocating more if necessary */
946 xpvhv = PL_xpvhv_root;
947 PL_xpvhv_root = (XPVHV*)xpvhv->xhv_array;
952 /* return a struct xpvhv to the free list */
955 S_del_xpvhv(pTHX_ XPVHV *p)
958 p->xhv_array = (char*)PL_xpvhv_root;
963 /* allocate another arena's worth of struct xpvhv */
968 register XPVHV* xpvhv;
969 register XPVHV* xpvhvend;
970 New(718, xpvhv, 1008/sizeof(XPVHV), XPVHV);
971 xpvhv->xhv_array = (char*)PL_xpvhv_arenaroot;
972 PL_xpvhv_arenaroot = xpvhv;
974 xpvhvend = &xpvhv[1008 / sizeof(XPVHV) - 1];
975 PL_xpvhv_root = ++xpvhv;
976 while (xpvhv < xpvhvend) {
977 xpvhv->xhv_array = (char*)(xpvhv + 1);
980 xpvhv->xhv_array = 0;
983 /* grab a new struct xpvmg from the free list, allocating more if necessary */
992 xpvmg = PL_xpvmg_root;
993 PL_xpvmg_root = (XPVMG*)xpvmg->xpv_pv;
998 /* return a struct xpvmg to the free list */
1001 S_del_xpvmg(pTHX_ XPVMG *p)
1004 p->xpv_pv = (char*)PL_xpvmg_root;
1009 /* allocate another arena's worth of struct xpvmg */
1014 register XPVMG* xpvmg;
1015 register XPVMG* xpvmgend;
1016 New(719, xpvmg, 1008/sizeof(XPVMG), XPVMG);
1017 xpvmg->xpv_pv = (char*)PL_xpvmg_arenaroot;
1018 PL_xpvmg_arenaroot = xpvmg;
1020 xpvmgend = &xpvmg[1008 / sizeof(XPVMG) - 1];
1021 PL_xpvmg_root = ++xpvmg;
1022 while (xpvmg < xpvmgend) {
1023 xpvmg->xpv_pv = (char*)(xpvmg + 1);
1029 /* grab a new struct xpvlv from the free list, allocating more if necessary */
1038 xpvlv = PL_xpvlv_root;
1039 PL_xpvlv_root = (XPVLV*)xpvlv->xpv_pv;
1044 /* return a struct xpvlv to the free list */
1047 S_del_xpvlv(pTHX_ XPVLV *p)
1050 p->xpv_pv = (char*)PL_xpvlv_root;
1055 /* allocate another arena's worth of struct xpvlv */
1060 register XPVLV* xpvlv;
1061 register XPVLV* xpvlvend;
1062 New(720, xpvlv, 1008/sizeof(XPVLV), XPVLV);
1063 xpvlv->xpv_pv = (char*)PL_xpvlv_arenaroot;
1064 PL_xpvlv_arenaroot = xpvlv;
1066 xpvlvend = &xpvlv[1008 / sizeof(XPVLV) - 1];
1067 PL_xpvlv_root = ++xpvlv;
1068 while (xpvlv < xpvlvend) {
1069 xpvlv->xpv_pv = (char*)(xpvlv + 1);
1075 /* grab a new struct xpvbm from the free list, allocating more if necessary */
1084 xpvbm = PL_xpvbm_root;
1085 PL_xpvbm_root = (XPVBM*)xpvbm->xpv_pv;
1090 /* return a struct xpvbm to the free list */
1093 S_del_xpvbm(pTHX_ XPVBM *p)
1096 p->xpv_pv = (char*)PL_xpvbm_root;
1101 /* allocate another arena's worth of struct xpvbm */
1106 register XPVBM* xpvbm;
1107 register XPVBM* xpvbmend;
1108 New(721, xpvbm, 1008/sizeof(XPVBM), XPVBM);
1109 xpvbm->xpv_pv = (char*)PL_xpvbm_arenaroot;
1110 PL_xpvbm_arenaroot = xpvbm;
1112 xpvbmend = &xpvbm[1008 / sizeof(XPVBM) - 1];
1113 PL_xpvbm_root = ++xpvbm;
1114 while (xpvbm < xpvbmend) {
1115 xpvbm->xpv_pv = (char*)(xpvbm + 1);
1122 # define my_safemalloc(s) (void*)safexmalloc(717,s)
1123 # define my_safefree(p) safexfree((char*)p)
1125 # define my_safemalloc(s) (void*)safemalloc(s)
1126 # define my_safefree(p) safefree((char*)p)
1131 #define new_XIV() my_safemalloc(sizeof(XPVIV))
1132 #define del_XIV(p) my_safefree(p)
1134 #define new_XNV() my_safemalloc(sizeof(XPVNV))
1135 #define del_XNV(p) my_safefree(p)
1137 #define new_XRV() my_safemalloc(sizeof(XRV))
1138 #define del_XRV(p) my_safefree(p)
1140 #define new_XPV() my_safemalloc(sizeof(XPV))
1141 #define del_XPV(p) my_safefree(p)
1143 #define new_XPVIV() my_safemalloc(sizeof(XPVIV))
1144 #define del_XPVIV(p) my_safefree(p)
1146 #define new_XPVNV() my_safemalloc(sizeof(XPVNV))
1147 #define del_XPVNV(p) my_safefree(p)
1149 #define new_XPVCV() my_safemalloc(sizeof(XPVCV))
1150 #define del_XPVCV(p) my_safefree(p)
1152 #define new_XPVAV() my_safemalloc(sizeof(XPVAV))
1153 #define del_XPVAV(p) my_safefree(p)
1155 #define new_XPVHV() my_safemalloc(sizeof(XPVHV))
1156 #define del_XPVHV(p) my_safefree(p)
1158 #define new_XPVMG() my_safemalloc(sizeof(XPVMG))
1159 #define del_XPVMG(p) my_safefree(p)
1161 #define new_XPVLV() my_safemalloc(sizeof(XPVLV))
1162 #define del_XPVLV(p) my_safefree(p)
1164 #define new_XPVBM() my_safemalloc(sizeof(XPVBM))
1165 #define del_XPVBM(p) my_safefree(p)
1169 #define new_XIV() (void*)new_xiv()
1170 #define del_XIV(p) del_xiv((XPVIV*) p)
1172 #define new_XNV() (void*)new_xnv()
1173 #define del_XNV(p) del_xnv((XPVNV*) p)
1175 #define new_XRV() (void*)new_xrv()
1176 #define del_XRV(p) del_xrv((XRV*) p)
1178 #define new_XPV() (void*)new_xpv()
1179 #define del_XPV(p) del_xpv((XPV *)p)
1181 #define new_XPVIV() (void*)new_xpviv()
1182 #define del_XPVIV(p) del_xpviv((XPVIV *)p)
1184 #define new_XPVNV() (void*)new_xpvnv()
1185 #define del_XPVNV(p) del_xpvnv((XPVNV *)p)
1187 #define new_XPVCV() (void*)new_xpvcv()
1188 #define del_XPVCV(p) del_xpvcv((XPVCV *)p)
1190 #define new_XPVAV() (void*)new_xpvav()
1191 #define del_XPVAV(p) del_xpvav((XPVAV *)p)
1193 #define new_XPVHV() (void*)new_xpvhv()
1194 #define del_XPVHV(p) del_xpvhv((XPVHV *)p)
1196 #define new_XPVMG() (void*)new_xpvmg()
1197 #define del_XPVMG(p) del_xpvmg((XPVMG *)p)
1199 #define new_XPVLV() (void*)new_xpvlv()
1200 #define del_XPVLV(p) del_xpvlv((XPVLV *)p)
1202 #define new_XPVBM() (void*)new_xpvbm()
1203 #define del_XPVBM(p) del_xpvbm((XPVBM *)p)
1207 #define new_XPVGV() my_safemalloc(sizeof(XPVGV))
1208 #define del_XPVGV(p) my_safefree(p)
1210 #define new_XPVFM() my_safemalloc(sizeof(XPVFM))
1211 #define del_XPVFM(p) my_safefree(p)
1213 #define new_XPVIO() my_safemalloc(sizeof(XPVIO))
1214 #define del_XPVIO(p) my_safefree(p)
1217 =for apidoc sv_upgrade
1219 Upgrade an SV to a more complex form. Generally adds a new body type to the
1220 SV, then copies across as much information as possible from the old body.
1221 You generally want to use the C<SvUPGRADE> macro wrapper. See also C<svtype>.
1227 Perl_sv_upgrade(pTHX_ register SV *sv, U32 mt)
1234 MAGIC* magic = NULL;
1237 if (mt != SVt_PV && SvREADONLY(sv) && SvFAKE(sv)) {
1238 sv_force_normal(sv);
1241 if (SvTYPE(sv) == mt)
1245 (void)SvOOK_off(sv);
1247 switch (SvTYPE(sv)) {
1268 else if (mt < SVt_PVIV)
1285 pv = (char*)SvRV(sv);
1305 else if (mt == SVt_NV)
1316 del_XPVIV(SvANY(sv));
1326 del_XPVNV(SvANY(sv));
1334 magic = SvMAGIC(sv);
1335 stash = SvSTASH(sv);
1336 del_XPVMG(SvANY(sv));
1339 Perl_croak(aTHX_ "Can't upgrade that kind of scalar");
1344 Perl_croak(aTHX_ "Can't upgrade to undef");
1346 SvANY(sv) = new_XIV();
1350 SvANY(sv) = new_XNV();
1354 SvANY(sv) = new_XRV();
1358 SvANY(sv) = new_XPV();
1364 SvANY(sv) = new_XPVIV();
1374 SvANY(sv) = new_XPVNV();
1382 SvANY(sv) = new_XPVMG();
1388 SvMAGIC(sv) = magic;
1389 SvSTASH(sv) = stash;
1392 SvANY(sv) = new_XPVLV();
1398 SvMAGIC(sv) = magic;
1399 SvSTASH(sv) = stash;
1406 SvANY(sv) = new_XPVAV();
1414 SvMAGIC(sv) = magic;
1415 SvSTASH(sv) = stash;
1421 SvANY(sv) = new_XPVHV();
1427 HvTOTALKEYS(sv) = 0;
1428 HvPLACEHOLDERS(sv) = 0;
1429 SvMAGIC(sv) = magic;
1430 SvSTASH(sv) = stash;
1437 SvANY(sv) = new_XPVCV();
1438 Zero(SvANY(sv), 1, XPVCV);
1444 SvMAGIC(sv) = magic;
1445 SvSTASH(sv) = stash;
1448 SvANY(sv) = new_XPVGV();
1454 SvMAGIC(sv) = magic;
1455 SvSTASH(sv) = stash;
1463 SvANY(sv) = new_XPVBM();
1469 SvMAGIC(sv) = magic;
1470 SvSTASH(sv) = stash;
1476 SvANY(sv) = new_XPVFM();
1477 Zero(SvANY(sv), 1, XPVFM);
1483 SvMAGIC(sv) = magic;
1484 SvSTASH(sv) = stash;
1487 SvANY(sv) = new_XPVIO();
1488 Zero(SvANY(sv), 1, XPVIO);
1494 SvMAGIC(sv) = magic;
1495 SvSTASH(sv) = stash;
1496 IoPAGE_LEN(sv) = 60;
1499 SvFLAGS(sv) &= ~SVTYPEMASK;
1505 =for apidoc sv_backoff
1507 Remove any string offset. You should normally use the C<SvOOK_off> macro
1514 Perl_sv_backoff(pTHX_ register SV *sv)
1518 char *s = SvPVX(sv);
1519 SvLEN(sv) += SvIVX(sv);
1520 SvPVX(sv) -= SvIVX(sv);
1522 Move(s, SvPVX(sv), SvCUR(sv)+1, char);
1524 SvFLAGS(sv) &= ~SVf_OOK;
1531 Expands the character buffer in the SV. If necessary, uses C<sv_unref> and
1532 upgrades the SV to C<SVt_PV>. Returns a pointer to the character buffer.
1533 Use the C<SvGROW> wrapper instead.
1539 Perl_sv_grow(pTHX_ register SV *sv, register STRLEN newlen)
1545 #ifdef HAS_64K_LIMIT
1546 if (newlen >= 0x10000) {
1547 PerlIO_printf(Perl_debug_log,
1548 "Allocation too large: %"UVxf"\n", (UV)newlen);
1551 #endif /* HAS_64K_LIMIT */
1554 if (SvTYPE(sv) < SVt_PV) {
1555 sv_upgrade(sv, SVt_PV);
1558 else if (SvOOK(sv)) { /* pv is offset? */
1561 if (newlen > SvLEN(sv))
1562 newlen += 10 * (newlen - SvCUR(sv)); /* avoid copy each time */
1563 #ifdef HAS_64K_LIMIT
1564 if (newlen >= 0x10000)
1571 if (newlen > SvLEN(sv)) { /* need more room? */
1572 if (SvLEN(sv) && s) {
1573 #if defined(MYMALLOC) && !defined(LEAKTEST)
1574 STRLEN l = malloced_size((void*)SvPVX(sv));
1580 Renew(s,newlen,char);
1583 /* sv_force_normal_flags() must not try to unshare the new
1584 PVX we allocate below. AMS 20010713 */
1585 if (SvREADONLY(sv) && SvFAKE(sv)) {
1589 New(703, s, newlen, char);
1590 if (SvPVX(sv) && SvCUR(sv)) {
1591 Move(SvPVX(sv), s, (newlen < SvCUR(sv)) ? newlen : SvCUR(sv), char);
1595 SvLEN_set(sv, newlen);
1601 =for apidoc sv_setiv
1603 Copies an integer into the given SV, upgrading first if necessary.
1604 Does not handle 'set' magic. See also C<sv_setiv_mg>.
1610 Perl_sv_setiv(pTHX_ register SV *sv, IV i)
1612 SV_CHECK_THINKFIRST(sv);
1613 switch (SvTYPE(sv)) {
1615 sv_upgrade(sv, SVt_IV);
1618 sv_upgrade(sv, SVt_PVNV);
1622 sv_upgrade(sv, SVt_PVIV);
1631 Perl_croak(aTHX_ "Can't coerce %s to integer in %s", sv_reftype(sv,0),
1634 (void)SvIOK_only(sv); /* validate number */
1640 =for apidoc sv_setiv_mg
1642 Like C<sv_setiv>, but also handles 'set' magic.
1648 Perl_sv_setiv_mg(pTHX_ register SV *sv, IV i)
1655 =for apidoc sv_setuv
1657 Copies an unsigned integer into the given SV, upgrading first if necessary.
1658 Does not handle 'set' magic. See also C<sv_setuv_mg>.
1664 Perl_sv_setuv(pTHX_ register SV *sv, UV u)
1666 /* With these two if statements:
1667 u=1.49 s=0.52 cu=72.49 cs=10.64 scripts=270 tests=20865
1670 u=1.35 s=0.47 cu=73.45 cs=11.43 scripts=270 tests=20865
1672 If you wish to remove them, please benchmark to see what the effect is
1674 if (u <= (UV)IV_MAX) {
1675 sv_setiv(sv, (IV)u);
1684 =for apidoc sv_setuv_mg
1686 Like C<sv_setuv>, but also handles 'set' magic.
1692 Perl_sv_setuv_mg(pTHX_ register SV *sv, UV u)
1694 /* With these two if statements:
1695 u=1.49 s=0.52 cu=72.49 cs=10.64 scripts=270 tests=20865
1698 u=1.35 s=0.47 cu=73.45 cs=11.43 scripts=270 tests=20865
1700 If you wish to remove them, please benchmark to see what the effect is
1702 if (u <= (UV)IV_MAX) {
1703 sv_setiv(sv, (IV)u);
1713 =for apidoc sv_setnv
1715 Copies a double into the given SV, upgrading first if necessary.
1716 Does not handle 'set' magic. See also C<sv_setnv_mg>.
1722 Perl_sv_setnv(pTHX_ register SV *sv, NV num)
1724 SV_CHECK_THINKFIRST(sv);
1725 switch (SvTYPE(sv)) {
1728 sv_upgrade(sv, SVt_NV);
1733 sv_upgrade(sv, SVt_PVNV);
1742 Perl_croak(aTHX_ "Can't coerce %s to number in %s", sv_reftype(sv,0),
1746 (void)SvNOK_only(sv); /* validate number */
1751 =for apidoc sv_setnv_mg
1753 Like C<sv_setnv>, but also handles 'set' magic.
1759 Perl_sv_setnv_mg(pTHX_ register SV *sv, NV num)
1765 /* Print an "isn't numeric" warning, using a cleaned-up,
1766 * printable version of the offending string
1770 S_not_a_number(pTHX_ SV *sv)
1777 dsv = sv_2mortal(newSVpv("", 0));
1778 pv = sv_uni_display(dsv, sv, 10, 0);
1781 char *limit = tmpbuf + sizeof(tmpbuf) - 8;
1782 /* each *s can expand to 4 chars + "...\0",
1783 i.e. need room for 8 chars */
1786 for (s = SvPVX(sv), end = s + SvCUR(sv); s < end && d < limit; s++) {
1788 if (ch & 128 && !isPRINT_LC(ch)) {
1797 else if (ch == '\r') {
1801 else if (ch == '\f') {
1805 else if (ch == '\\') {
1809 else if (ch == '\0') {
1813 else if (isPRINT_LC(ch))
1830 Perl_warner(aTHX_ packWARN(WARN_NUMERIC),
1831 "Argument \"%s\" isn't numeric in %s", pv,
1834 Perl_warner(aTHX_ packWARN(WARN_NUMERIC),
1835 "Argument \"%s\" isn't numeric", pv);
1839 =for apidoc looks_like_number
1841 Test if the content of an SV looks like a number (or is a number).
1842 C<Inf> and C<Infinity> are treated as numbers (so will not issue a
1843 non-numeric warning), even if your atof() doesn't grok them.
1849 Perl_looks_like_number(pTHX_ SV *sv)
1851 register char *sbegin;
1858 else if (SvPOKp(sv))
1859 sbegin = SvPV(sv, len);
1861 return 1; /* Historic. Wrong? */
1862 return grok_number(sbegin, len, NULL);
1865 /* Actually, ISO C leaves conversion of UV to IV undefined, but
1866 until proven guilty, assume that things are not that bad... */
1871 As 64 bit platforms often have an NV that doesn't preserve all bits of
1872 an IV (an assumption perl has been based on to date) it becomes necessary
1873 to remove the assumption that the NV always carries enough precision to
1874 recreate the IV whenever needed, and that the NV is the canonical form.
1875 Instead, IV/UV and NV need to be given equal rights. So as to not lose
1876 precision as a side effect of conversion (which would lead to insanity
1877 and the dragon(s) in t/op/numconvert.t getting very angry) the intent is
1878 1) to distinguish between IV/UV/NV slots that have cached a valid
1879 conversion where precision was lost and IV/UV/NV slots that have a
1880 valid conversion which has lost no precision
1881 2) to ensure that if a numeric conversion to one form is requested that
1882 would lose precision, the precise conversion (or differently
1883 imprecise conversion) is also performed and cached, to prevent
1884 requests for different numeric formats on the same SV causing
1885 lossy conversion chains. (lossless conversion chains are perfectly
1890 SvIOKp is true if the IV slot contains a valid value
1891 SvIOK is true only if the IV value is accurate (UV if SvIOK_UV true)
1892 SvNOKp is true if the NV slot contains a valid value
1893 SvNOK is true only if the NV value is accurate
1896 while converting from PV to NV, check to see if converting that NV to an
1897 IV(or UV) would lose accuracy over a direct conversion from PV to
1898 IV(or UV). If it would, cache both conversions, return NV, but mark
1899 SV as IOK NOKp (ie not NOK).
1901 While converting from PV to IV, check to see if converting that IV to an
1902 NV would lose accuracy over a direct conversion from PV to NV. If it
1903 would, cache both conversions, flag similarly.
1905 Before, the SV value "3.2" could become NV=3.2 IV=3 NOK, IOK quite
1906 correctly because if IV & NV were set NV *always* overruled.
1907 Now, "3.2" will become NV=3.2 IV=3 NOK, IOKp, because the flag's meaning
1908 changes - now IV and NV together means that the two are interchangeable:
1909 SvIVX == (IV) SvNVX && SvNVX == (NV) SvIVX;
1911 The benefit of this is that operations such as pp_add know that if
1912 SvIOK is true for both left and right operands, then integer addition
1913 can be used instead of floating point (for cases where the result won't
1914 overflow). Before, floating point was always used, which could lead to
1915 loss of precision compared with integer addition.
1917 * making IV and NV equal status should make maths accurate on 64 bit
1919 * may speed up maths somewhat if pp_add and friends start to use
1920 integers when possible instead of fp. (Hopefully the overhead in
1921 looking for SvIOK and checking for overflow will not outweigh the
1922 fp to integer speedup)
1923 * will slow down integer operations (callers of SvIV) on "inaccurate"
1924 values, as the change from SvIOK to SvIOKp will cause a call into
1925 sv_2iv each time rather than a macro access direct to the IV slot
1926 * should speed up number->string conversion on integers as IV is
1927 favoured when IV and NV are equally accurate
1929 ####################################################################
1930 You had better be using SvIOK_notUV if you want an IV for arithmetic:
1931 SvIOK is true if (IV or UV), so you might be getting (IV)SvUV.
1932 On the other hand, SvUOK is true iff UV.
1933 ####################################################################
1935 Your mileage will vary depending your CPU's relative fp to integer
1939 #ifndef NV_PRESERVES_UV
1940 # define IS_NUMBER_UNDERFLOW_IV 1
1941 # define IS_NUMBER_UNDERFLOW_UV 2
1942 # define IS_NUMBER_IV_AND_UV 2
1943 # define IS_NUMBER_OVERFLOW_IV 4
1944 # define IS_NUMBER_OVERFLOW_UV 5
1946 /* sv_2iuv_non_preserve(): private routine for use by sv_2iv() and sv_2uv() */
1948 /* For sv_2nv these three cases are "SvNOK and don't bother casting" */
1950 S_sv_2iuv_non_preserve(pTHX_ register SV *sv, I32 numtype)
1952 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));
1953 if (SvNVX(sv) < (NV)IV_MIN) {
1954 (void)SvIOKp_on(sv);
1957 return IS_NUMBER_UNDERFLOW_IV;
1959 if (SvNVX(sv) > (NV)UV_MAX) {
1960 (void)SvIOKp_on(sv);
1964 return IS_NUMBER_OVERFLOW_UV;
1966 (void)SvIOKp_on(sv);
1968 /* Can't use strtol etc to convert this string. (See truth table in
1970 if (SvNVX(sv) <= (UV)IV_MAX) {
1971 SvIVX(sv) = I_V(SvNVX(sv));
1972 if ((NV)(SvIVX(sv)) == SvNVX(sv)) {
1973 SvIOK_on(sv); /* Integer is precise. NOK, IOK */
1975 /* Integer is imprecise. NOK, IOKp */
1977 return SvNVX(sv) < 0 ? IS_NUMBER_UNDERFLOW_UV : IS_NUMBER_IV_AND_UV;
1980 SvUVX(sv) = U_V(SvNVX(sv));
1981 if ((NV)(SvUVX(sv)) == SvNVX(sv)) {
1982 if (SvUVX(sv) == UV_MAX) {
1983 /* As we know that NVs don't preserve UVs, UV_MAX cannot
1984 possibly be preserved by NV. Hence, it must be overflow.
1986 return IS_NUMBER_OVERFLOW_UV;
1988 SvIOK_on(sv); /* Integer is precise. NOK, UOK */
1990 /* Integer is imprecise. NOK, IOKp */
1992 return IS_NUMBER_OVERFLOW_IV;
1994 #endif /* !NV_PRESERVES_UV*/
1999 Return the integer value of an SV, doing any necessary string conversion,
2000 magic etc. Normally used via the C<SvIV(sv)> and C<SvIVx(sv)> macros.
2006 Perl_sv_2iv(pTHX_ register SV *sv)
2010 if (SvGMAGICAL(sv)) {
2015 return I_V(SvNVX(sv));
2017 if (SvPOKp(sv) && SvLEN(sv))
2020 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
2021 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
2027 if (SvTHINKFIRST(sv)) {
2030 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,numer)) &&
2031 (SvTYPE(tmpstr) != SVt_RV || (SvRV(tmpstr) != SvRV(sv))))
2032 return SvIV(tmpstr);
2033 return PTR2IV(SvRV(sv));
2035 if (SvREADONLY(sv) && SvFAKE(sv)) {
2036 sv_force_normal(sv);
2038 if (SvREADONLY(sv) && !SvOK(sv)) {
2039 if (ckWARN(WARN_UNINITIALIZED))
2046 return (IV)(SvUVX(sv));
2053 /* erm. not sure. *should* never get NOKp (without NOK) from sv_2nv
2054 * without also getting a cached IV/UV from it at the same time
2055 * (ie PV->NV conversion should detect loss of accuracy and cache
2056 * IV or UV at same time to avoid this. NWC */
2058 if (SvTYPE(sv) == SVt_NV)
2059 sv_upgrade(sv, SVt_PVNV);
2061 (void)SvIOKp_on(sv); /* Must do this first, to clear any SvOOK */
2062 /* < not <= as for NV doesn't preserve UV, ((NV)IV_MAX+1) will almost
2063 certainly cast into the IV range at IV_MAX, whereas the correct
2064 answer is the UV IV_MAX +1. Hence < ensures that dodgy boundary
2066 if (SvNVX(sv) < (NV)IV_MAX + 0.5) {
2067 SvIVX(sv) = I_V(SvNVX(sv));
2068 if (SvNVX(sv) == (NV) SvIVX(sv)
2069 #ifndef NV_PRESERVES_UV
2070 && (((UV)1 << NV_PRESERVES_UV_BITS) >
2071 (UV)(SvIVX(sv) > 0 ? SvIVX(sv) : -SvIVX(sv)))
2072 /* Don't flag it as "accurately an integer" if the number
2073 came from a (by definition imprecise) NV operation, and
2074 we're outside the range of NV integer precision */
2077 SvIOK_on(sv); /* Can this go wrong with rounding? NWC */
2078 DEBUG_c(PerlIO_printf(Perl_debug_log,
2079 "0x%"UVxf" iv(%"NVgf" => %"IVdf") (precise)\n",
2085 /* IV not precise. No need to convert from PV, as NV
2086 conversion would already have cached IV if it detected
2087 that PV->IV would be better than PV->NV->IV
2088 flags already correct - don't set public IOK. */
2089 DEBUG_c(PerlIO_printf(Perl_debug_log,
2090 "0x%"UVxf" iv(%"NVgf" => %"IVdf") (imprecise)\n",
2095 /* Can the above go wrong if SvIVX == IV_MIN and SvNVX < IV_MIN,
2096 but the cast (NV)IV_MIN rounds to a the value less (more
2097 negative) than IV_MIN which happens to be equal to SvNVX ??
2098 Analogous to 0xFFFFFFFFFFFFFFFF rounding up to NV (2**64) and
2099 NV rounding back to 0xFFFFFFFFFFFFFFFF, so UVX == UV(NVX) and
2100 (NV)UVX == NVX are both true, but the values differ. :-(
2101 Hopefully for 2s complement IV_MIN is something like
2102 0x8000000000000000 which will be exact. NWC */
2105 SvUVX(sv) = U_V(SvNVX(sv));
2107 (SvNVX(sv) == (NV) SvUVX(sv))
2108 #ifndef NV_PRESERVES_UV
2109 /* Make sure it's not 0xFFFFFFFFFFFFFFFF */
2110 /*&& (SvUVX(sv) != UV_MAX) irrelevant with code below */
2111 && (((UV)1 << NV_PRESERVES_UV_BITS) > SvUVX(sv))
2112 /* Don't flag it as "accurately an integer" if the number
2113 came from a (by definition imprecise) NV operation, and
2114 we're outside the range of NV integer precision */
2120 DEBUG_c(PerlIO_printf(Perl_debug_log,
2121 "0x%"UVxf" 2iv(%"UVuf" => %"IVdf") (as unsigned)\n",
2125 return (IV)SvUVX(sv);
2128 else if (SvPOKp(sv) && SvLEN(sv)) {
2130 int numtype = grok_number(SvPVX(sv), SvCUR(sv), &value);
2131 /* We want to avoid a possible problem when we cache an IV which
2132 may be later translated to an NV, and the resulting NV is not
2133 the same as the direct translation of the initial string
2134 (eg 123.456 can shortcut to the IV 123 with atol(), but we must
2135 be careful to ensure that the value with the .456 is around if the
2136 NV value is requested in the future).
2138 This means that if we cache such an IV, we need to cache the
2139 NV as well. Moreover, we trade speed for space, and do not
2140 cache the NV if we are sure it's not needed.
2143 /* SVt_PVNV is one higher than SVt_PVIV, hence this order */
2144 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2145 == IS_NUMBER_IN_UV) {
2146 /* It's definitely an integer, only upgrade to PVIV */
2147 if (SvTYPE(sv) < SVt_PVIV)
2148 sv_upgrade(sv, SVt_PVIV);
2150 } else if (SvTYPE(sv) < SVt_PVNV)
2151 sv_upgrade(sv, SVt_PVNV);
2153 /* If NV preserves UV then we only use the UV value if we know that
2154 we aren't going to call atof() below. If NVs don't preserve UVs
2155 then the value returned may have more precision than atof() will
2156 return, even though value isn't perfectly accurate. */
2157 if ((numtype & (IS_NUMBER_IN_UV
2158 #ifdef NV_PRESERVES_UV
2161 )) == IS_NUMBER_IN_UV) {
2162 /* This won't turn off the public IOK flag if it was set above */
2163 (void)SvIOKp_on(sv);
2165 if (!(numtype & IS_NUMBER_NEG)) {
2167 if (value <= (UV)IV_MAX) {
2168 SvIVX(sv) = (IV)value;
2174 /* 2s complement assumption */
2175 if (value <= (UV)IV_MIN) {
2176 SvIVX(sv) = -(IV)value;
2178 /* Too negative for an IV. This is a double upgrade, but
2179 I'm assuming it will be rare. */
2180 if (SvTYPE(sv) < SVt_PVNV)
2181 sv_upgrade(sv, SVt_PVNV);
2185 SvNVX(sv) = -(NV)value;
2190 /* For !NV_PRESERVES_UV and IS_NUMBER_IN_UV and IS_NUMBER_NOT_INT we
2191 will be in the previous block to set the IV slot, and the next
2192 block to set the NV slot. So no else here. */
2194 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2195 != IS_NUMBER_IN_UV) {
2196 /* It wasn't an (integer that doesn't overflow the UV). */
2197 SvNVX(sv) = Atof(SvPVX(sv));
2199 if (! numtype && ckWARN(WARN_NUMERIC))
2202 #if defined(USE_LONG_DOUBLE)
2203 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2iv(%" PERL_PRIgldbl ")\n",
2204 PTR2UV(sv), SvNVX(sv)));
2206 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2iv(%"NVgf")\n",
2207 PTR2UV(sv), SvNVX(sv)));
2211 #ifdef NV_PRESERVES_UV
2212 (void)SvIOKp_on(sv);
2214 if (SvNVX(sv) < (NV)IV_MAX + 0.5) {
2215 SvIVX(sv) = I_V(SvNVX(sv));
2216 if ((NV)(SvIVX(sv)) == SvNVX(sv)) {
2219 /* Integer is imprecise. NOK, IOKp */
2221 /* UV will not work better than IV */
2223 if (SvNVX(sv) > (NV)UV_MAX) {
2225 /* Integer is inaccurate. NOK, IOKp, is UV */
2229 SvUVX(sv) = U_V(SvNVX(sv));
2230 /* 0xFFFFFFFFFFFFFFFF not an issue in here */
2231 if ((NV)(SvUVX(sv)) == SvNVX(sv)) {
2235 /* Integer is imprecise. NOK, IOKp, is UV */
2241 #else /* NV_PRESERVES_UV */
2242 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2243 == (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT)) {
2244 /* The IV slot will have been set from value returned by
2245 grok_number above. The NV slot has just been set using
2248 assert (SvIOKp(sv));
2250 if (((UV)1 << NV_PRESERVES_UV_BITS) >
2251 U_V(SvNVX(sv) > 0 ? SvNVX(sv) : -SvNVX(sv))) {
2252 /* Small enough to preserve all bits. */
2253 (void)SvIOKp_on(sv);
2255 SvIVX(sv) = I_V(SvNVX(sv));
2256 if ((NV)(SvIVX(sv)) == SvNVX(sv))
2258 /* Assumption: first non-preserved integer is < IV_MAX,
2259 this NV is in the preserved range, therefore: */
2260 if (!(U_V(SvNVX(sv) > 0 ? SvNVX(sv) : -SvNVX(sv))
2262 Perl_croak(aTHX_ "sv_2iv assumed (U_V(fabs(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);
2266 0 0 already failed to read UV.
2267 0 1 already failed to read UV.
2268 1 0 you won't get here in this case. IV/UV
2269 slot set, public IOK, Atof() unneeded.
2270 1 1 already read UV.
2271 so there's no point in sv_2iuv_non_preserve() attempting
2272 to use atol, strtol, strtoul etc. */
2273 if (sv_2iuv_non_preserve (sv, numtype)
2274 >= IS_NUMBER_OVERFLOW_IV)
2278 #endif /* NV_PRESERVES_UV */
2281 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP))
2283 if (SvTYPE(sv) < SVt_IV)
2284 /* Typically the caller expects that sv_any is not NULL now. */
2285 sv_upgrade(sv, SVt_IV);
2288 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2iv(%"IVdf")\n",
2289 PTR2UV(sv),SvIVX(sv)));
2290 return SvIsUV(sv) ? (IV)SvUVX(sv) : SvIVX(sv);
2296 Return the unsigned integer value of an SV, doing any necessary string
2297 conversion, magic etc. Normally used via the C<SvUV(sv)> and C<SvUVx(sv)>
2304 Perl_sv_2uv(pTHX_ register SV *sv)
2308 if (SvGMAGICAL(sv)) {
2313 return U_V(SvNVX(sv));
2314 if (SvPOKp(sv) && SvLEN(sv))
2317 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
2318 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
2324 if (SvTHINKFIRST(sv)) {
2327 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,numer)) &&
2328 (SvTYPE(tmpstr) != SVt_RV || (SvRV(tmpstr) != SvRV(sv))))
2329 return SvUV(tmpstr);
2330 return PTR2UV(SvRV(sv));
2332 if (SvREADONLY(sv) && SvFAKE(sv)) {
2333 sv_force_normal(sv);
2335 if (SvREADONLY(sv) && !SvOK(sv)) {
2336 if (ckWARN(WARN_UNINITIALIZED))
2346 return (UV)SvIVX(sv);
2350 /* erm. not sure. *should* never get NOKp (without NOK) from sv_2nv
2351 * without also getting a cached IV/UV from it at the same time
2352 * (ie PV->NV conversion should detect loss of accuracy and cache
2353 * IV or UV at same time to avoid this. */
2354 /* IV-over-UV optimisation - choose to cache IV if possible */
2356 if (SvTYPE(sv) == SVt_NV)
2357 sv_upgrade(sv, SVt_PVNV);
2359 (void)SvIOKp_on(sv); /* Must do this first, to clear any SvOOK */
2360 if (SvNVX(sv) < (NV)IV_MAX + 0.5) {
2361 SvIVX(sv) = I_V(SvNVX(sv));
2362 if (SvNVX(sv) == (NV) SvIVX(sv)
2363 #ifndef NV_PRESERVES_UV
2364 && (((UV)1 << NV_PRESERVES_UV_BITS) >
2365 (UV)(SvIVX(sv) > 0 ? SvIVX(sv) : -SvIVX(sv)))
2366 /* Don't flag it as "accurately an integer" if the number
2367 came from a (by definition imprecise) NV operation, and
2368 we're outside the range of NV integer precision */
2371 SvIOK_on(sv); /* Can this go wrong with rounding? NWC */
2372 DEBUG_c(PerlIO_printf(Perl_debug_log,
2373 "0x%"UVxf" uv(%"NVgf" => %"IVdf") (precise)\n",
2379 /* IV not precise. No need to convert from PV, as NV
2380 conversion would already have cached IV if it detected
2381 that PV->IV would be better than PV->NV->IV
2382 flags already correct - don't set public IOK. */
2383 DEBUG_c(PerlIO_printf(Perl_debug_log,
2384 "0x%"UVxf" uv(%"NVgf" => %"IVdf") (imprecise)\n",
2389 /* Can the above go wrong if SvIVX == IV_MIN and SvNVX < IV_MIN,
2390 but the cast (NV)IV_MIN rounds to a the value less (more
2391 negative) than IV_MIN which happens to be equal to SvNVX ??
2392 Analogous to 0xFFFFFFFFFFFFFFFF rounding up to NV (2**64) and
2393 NV rounding back to 0xFFFFFFFFFFFFFFFF, so UVX == UV(NVX) and
2394 (NV)UVX == NVX are both true, but the values differ. :-(
2395 Hopefully for 2s complement IV_MIN is something like
2396 0x8000000000000000 which will be exact. NWC */
2399 SvUVX(sv) = U_V(SvNVX(sv));
2401 (SvNVX(sv) == (NV) SvUVX(sv))
2402 #ifndef NV_PRESERVES_UV
2403 /* Make sure it's not 0xFFFFFFFFFFFFFFFF */
2404 /*&& (SvUVX(sv) != UV_MAX) irrelevant with code below */
2405 && (((UV)1 << NV_PRESERVES_UV_BITS) > SvUVX(sv))
2406 /* Don't flag it as "accurately an integer" if the number
2407 came from a (by definition imprecise) NV operation, and
2408 we're outside the range of NV integer precision */
2413 DEBUG_c(PerlIO_printf(Perl_debug_log,
2414 "0x%"UVxf" 2uv(%"UVuf" => %"IVdf") (as unsigned)\n",
2420 else if (SvPOKp(sv) && SvLEN(sv)) {
2422 int numtype = grok_number(SvPVX(sv), SvCUR(sv), &value);
2424 /* We want to avoid a possible problem when we cache a UV which
2425 may be later translated to an NV, and the resulting NV is not
2426 the translation of the initial data.
2428 This means that if we cache such a UV, we need to cache the
2429 NV as well. Moreover, we trade speed for space, and do not
2430 cache the NV if not needed.
2433 /* SVt_PVNV is one higher than SVt_PVIV, hence this order */
2434 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2435 == IS_NUMBER_IN_UV) {
2436 /* It's definitely an integer, only upgrade to PVIV */
2437 if (SvTYPE(sv) < SVt_PVIV)
2438 sv_upgrade(sv, SVt_PVIV);
2440 } else if (SvTYPE(sv) < SVt_PVNV)
2441 sv_upgrade(sv, SVt_PVNV);
2443 /* If NV preserves UV then we only use the UV value if we know that
2444 we aren't going to call atof() below. If NVs don't preserve UVs
2445 then the value returned may have more precision than atof() will
2446 return, even though it isn't accurate. */
2447 if ((numtype & (IS_NUMBER_IN_UV
2448 #ifdef NV_PRESERVES_UV
2451 )) == IS_NUMBER_IN_UV) {
2452 /* This won't turn off the public IOK flag if it was set above */
2453 (void)SvIOKp_on(sv);
2455 if (!(numtype & IS_NUMBER_NEG)) {
2457 if (value <= (UV)IV_MAX) {
2458 SvIVX(sv) = (IV)value;
2460 /* it didn't overflow, and it was positive. */
2465 /* 2s complement assumption */
2466 if (value <= (UV)IV_MIN) {
2467 SvIVX(sv) = -(IV)value;
2469 /* Too negative for an IV. This is a double upgrade, but
2470 I'm assuming it will be rare. */
2471 if (SvTYPE(sv) < SVt_PVNV)
2472 sv_upgrade(sv, SVt_PVNV);
2476 SvNVX(sv) = -(NV)value;
2482 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2483 != IS_NUMBER_IN_UV) {
2484 /* It wasn't an integer, or it overflowed the UV. */
2485 SvNVX(sv) = Atof(SvPVX(sv));
2487 if (! numtype && ckWARN(WARN_NUMERIC))
2490 #if defined(USE_LONG_DOUBLE)
2491 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2uv(%" PERL_PRIgldbl ")\n",
2492 PTR2UV(sv), SvNVX(sv)));
2494 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2uv(%"NVgf")\n",
2495 PTR2UV(sv), SvNVX(sv)));
2498 #ifdef NV_PRESERVES_UV
2499 (void)SvIOKp_on(sv);
2501 if (SvNVX(sv) < (NV)IV_MAX + 0.5) {
2502 SvIVX(sv) = I_V(SvNVX(sv));
2503 if ((NV)(SvIVX(sv)) == SvNVX(sv)) {
2506 /* Integer is imprecise. NOK, IOKp */
2508 /* UV will not work better than IV */
2510 if (SvNVX(sv) > (NV)UV_MAX) {
2512 /* Integer is inaccurate. NOK, IOKp, is UV */
2516 SvUVX(sv) = U_V(SvNVX(sv));
2517 /* 0xFFFFFFFFFFFFFFFF not an issue in here, NVs
2518 NV preservse UV so can do correct comparison. */
2519 if ((NV)(SvUVX(sv)) == SvNVX(sv)) {
2523 /* Integer is imprecise. NOK, IOKp, is UV */
2528 #else /* NV_PRESERVES_UV */
2529 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2530 == (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT)) {
2531 /* The UV slot will have been set from value returned by
2532 grok_number above. The NV slot has just been set using
2535 assert (SvIOKp(sv));
2537 if (((UV)1 << NV_PRESERVES_UV_BITS) >
2538 U_V(SvNVX(sv) > 0 ? SvNVX(sv) : -SvNVX(sv))) {
2539 /* Small enough to preserve all bits. */
2540 (void)SvIOKp_on(sv);
2542 SvIVX(sv) = I_V(SvNVX(sv));
2543 if ((NV)(SvIVX(sv)) == SvNVX(sv))
2545 /* Assumption: first non-preserved integer is < IV_MAX,
2546 this NV is in the preserved range, therefore: */
2547 if (!(U_V(SvNVX(sv) > 0 ? SvNVX(sv) : -SvNVX(sv))
2549 Perl_croak(aTHX_ "sv_2uv assumed (U_V(fabs(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);
2552 sv_2iuv_non_preserve (sv, numtype);
2554 #endif /* NV_PRESERVES_UV */
2558 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
2559 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
2562 if (SvTYPE(sv) < SVt_IV)
2563 /* Typically the caller expects that sv_any is not NULL now. */
2564 sv_upgrade(sv, SVt_IV);
2568 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2uv(%"UVuf")\n",
2569 PTR2UV(sv),SvUVX(sv)));
2570 return SvIsUV(sv) ? SvUVX(sv) : (UV)SvIVX(sv);
2576 Return the num value of an SV, doing any necessary string or integer
2577 conversion, magic etc. Normally used via the C<SvNV(sv)> and C<SvNVx(sv)>
2584 Perl_sv_2nv(pTHX_ register SV *sv)
2588 if (SvGMAGICAL(sv)) {
2592 if (SvPOKp(sv) && SvLEN(sv)) {
2593 if (ckWARN(WARN_NUMERIC) && !SvIOKp(sv) &&
2594 !grok_number(SvPVX(sv), SvCUR(sv), NULL))
2596 return Atof(SvPVX(sv));
2600 return (NV)SvUVX(sv);
2602 return (NV)SvIVX(sv);
2605 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
2606 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
2612 if (SvTHINKFIRST(sv)) {
2615 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,numer)) &&
2616 (SvTYPE(tmpstr) != SVt_RV || (SvRV(tmpstr) != SvRV(sv))))
2617 return SvNV(tmpstr);
2618 return PTR2NV(SvRV(sv));
2620 if (SvREADONLY(sv) && SvFAKE(sv)) {
2621 sv_force_normal(sv);
2623 if (SvREADONLY(sv) && !SvOK(sv)) {
2624 if (ckWARN(WARN_UNINITIALIZED))
2629 if (SvTYPE(sv) < SVt_NV) {
2630 if (SvTYPE(sv) == SVt_IV)
2631 sv_upgrade(sv, SVt_PVNV);
2633 sv_upgrade(sv, SVt_NV);
2634 #ifdef USE_LONG_DOUBLE
2636 STORE_NUMERIC_LOCAL_SET_STANDARD();
2637 PerlIO_printf(Perl_debug_log,
2638 "0x%"UVxf" num(%" PERL_PRIgldbl ")\n",
2639 PTR2UV(sv), SvNVX(sv));
2640 RESTORE_NUMERIC_LOCAL();
2644 STORE_NUMERIC_LOCAL_SET_STANDARD();
2645 PerlIO_printf(Perl_debug_log, "0x%"UVxf" num(%"NVgf")\n",
2646 PTR2UV(sv), SvNVX(sv));
2647 RESTORE_NUMERIC_LOCAL();
2651 else if (SvTYPE(sv) < SVt_PVNV)
2652 sv_upgrade(sv, SVt_PVNV);
2657 SvNVX(sv) = SvIsUV(sv) ? (NV)SvUVX(sv) : (NV)SvIVX(sv);
2658 #ifdef NV_PRESERVES_UV
2661 /* Only set the public NV OK flag if this NV preserves the IV */
2662 /* Check it's not 0xFFFFFFFFFFFFFFFF */
2663 if (SvIsUV(sv) ? ((SvUVX(sv) != UV_MAX)&&(SvUVX(sv) == U_V(SvNVX(sv))))
2664 : (SvIVX(sv) == I_V(SvNVX(sv))))
2670 else if (SvPOKp(sv) && SvLEN(sv)) {
2672 int numtype = grok_number(SvPVX(sv), SvCUR(sv), &value);
2673 if (ckWARN(WARN_NUMERIC) && !SvIOKp(sv) && !numtype)
2675 #ifdef NV_PRESERVES_UV
2676 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2677 == IS_NUMBER_IN_UV) {
2678 /* It's definitely an integer */
2679 SvNVX(sv) = (numtype & IS_NUMBER_NEG) ? -(NV)value : (NV)value;
2681 SvNVX(sv) = Atof(SvPVX(sv));
2684 SvNVX(sv) = Atof(SvPVX(sv));
2685 /* Only set the public NV OK flag if this NV preserves the value in
2686 the PV at least as well as an IV/UV would.
2687 Not sure how to do this 100% reliably. */
2688 /* if that shift count is out of range then Configure's test is
2689 wonky. We shouldn't be in here with NV_PRESERVES_UV_BITS ==
2691 if (((UV)1 << NV_PRESERVES_UV_BITS) >
2692 U_V(SvNVX(sv) > 0 ? SvNVX(sv) : -SvNVX(sv))) {
2693 SvNOK_on(sv); /* Definitely small enough to preserve all bits */
2694 } else if (!(numtype & IS_NUMBER_IN_UV)) {
2695 /* Can't use strtol etc to convert this string, so don't try.
2696 sv_2iv and sv_2uv will use the NV to convert, not the PV. */
2699 /* value has been set. It may not be precise. */
2700 if ((numtype & IS_NUMBER_NEG) && (value > (UV)IV_MIN)) {
2701 /* 2s complement assumption for (UV)IV_MIN */
2702 SvNOK_on(sv); /* Integer is too negative. */
2707 if (numtype & IS_NUMBER_NEG) {
2708 SvIVX(sv) = -(IV)value;
2709 } else if (value <= (UV)IV_MAX) {
2710 SvIVX(sv) = (IV)value;
2716 if (numtype & IS_NUMBER_NOT_INT) {
2717 /* I believe that even if the original PV had decimals,
2718 they are lost beyond the limit of the FP precision.
2719 However, neither is canonical, so both only get p
2720 flags. NWC, 2000/11/25 */
2721 /* Both already have p flags, so do nothing */
2724 if (SvNVX(sv) < (NV)IV_MAX + 0.5) {
2725 if (SvIVX(sv) == I_V(nv)) {
2730 /* It had no "." so it must be integer. */
2733 /* between IV_MAX and NV(UV_MAX).
2734 Could be slightly > UV_MAX */
2736 if (numtype & IS_NUMBER_NOT_INT) {
2737 /* UV and NV both imprecise. */
2739 UV nv_as_uv = U_V(nv);
2741 if (value == nv_as_uv && SvUVX(sv) != UV_MAX) {
2752 #endif /* NV_PRESERVES_UV */
2755 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP))
2757 if (SvTYPE(sv) < SVt_NV)
2758 /* Typically the caller expects that sv_any is not NULL now. */
2759 /* XXX Ilya implies that this is a bug in callers that assume this
2760 and ideally should be fixed. */
2761 sv_upgrade(sv, SVt_NV);
2764 #if defined(USE_LONG_DOUBLE)
2766 STORE_NUMERIC_LOCAL_SET_STANDARD();
2767 PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2nv(%" PERL_PRIgldbl ")\n",
2768 PTR2UV(sv), SvNVX(sv));
2769 RESTORE_NUMERIC_LOCAL();
2773 STORE_NUMERIC_LOCAL_SET_STANDARD();
2774 PerlIO_printf(Perl_debug_log, "0x%"UVxf" 1nv(%"NVgf")\n",
2775 PTR2UV(sv), SvNVX(sv));
2776 RESTORE_NUMERIC_LOCAL();
2782 /* asIV(): extract an integer from the string value of an SV.
2783 * Caller must validate PVX */
2786 S_asIV(pTHX_ SV *sv)
2789 int numtype = grok_number(SvPVX(sv), SvCUR(sv), &value);
2791 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2792 == IS_NUMBER_IN_UV) {
2793 /* It's definitely an integer */
2794 if (numtype & IS_NUMBER_NEG) {
2795 if (value < (UV)IV_MIN)
2798 if (value < (UV)IV_MAX)
2803 if (ckWARN(WARN_NUMERIC))
2806 return I_V(Atof(SvPVX(sv)));
2809 /* asUV(): extract an unsigned integer from the string value of an SV
2810 * Caller must validate PVX */
2813 S_asUV(pTHX_ SV *sv)
2816 int numtype = grok_number(SvPVX(sv), SvCUR(sv), &value);
2818 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2819 == IS_NUMBER_IN_UV) {
2820 /* It's definitely an integer */
2821 if (!(numtype & IS_NUMBER_NEG))
2825 if (ckWARN(WARN_NUMERIC))
2828 return U_V(Atof(SvPVX(sv)));
2832 =for apidoc sv_2pv_nolen
2834 Like C<sv_2pv()>, but doesn't return the length too. You should usually
2835 use the macro wrapper C<SvPV_nolen(sv)> instead.
2840 Perl_sv_2pv_nolen(pTHX_ register SV *sv)
2843 return sv_2pv(sv, &n_a);
2846 /* uiv_2buf(): private routine for use by sv_2pv_flags(): print an IV or
2847 * UV as a string towards the end of buf, and return pointers to start and
2850 * We assume that buf is at least TYPE_CHARS(UV) long.
2854 uiv_2buf(char *buf, IV iv, UV uv, int is_uv, char **peob)
2856 char *ptr = buf + TYPE_CHARS(UV);
2870 *--ptr = '0' + (char)(uv % 10);
2879 =for apidoc sv_2pv_flags
2881 Returns a pointer to the string value of an SV, and sets *lp to its length.
2882 If flags includes SV_GMAGIC, does an mg_get() first. Coerces sv to a string
2884 Normally invoked via the C<SvPV_flags> macro. C<sv_2pv()> and C<sv_2pv_nomg>
2885 usually end up here too.
2891 Perl_sv_2pv_flags(pTHX_ register SV *sv, STRLEN *lp, I32 flags)
2896 char tbuf[64]; /* Must fit sprintf/Gconvert of longest IV/NV */
2897 char *tmpbuf = tbuf;
2903 if (SvGMAGICAL(sv)) {
2904 if (flags & SV_GMAGIC)
2912 (void)sprintf(tmpbuf,"%"UVuf, (UV)SvUVX(sv));
2914 (void)sprintf(tmpbuf,"%"IVdf, (IV)SvIVX(sv));
2919 Gconvert(SvNVX(sv), NV_DIG, 0, tmpbuf);
2924 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
2925 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
2932 if (SvTHINKFIRST(sv)) {
2935 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,string)) &&
2936 (SvTYPE(tmpstr) != SVt_RV || (SvRV(tmpstr) != SvRV(sv))))
2937 return SvPV(tmpstr,*lp);
2944 switch (SvTYPE(sv)) {
2946 if ( ((SvFLAGS(sv) &
2947 (SVs_OBJECT|SVf_OK|SVs_GMG|SVs_SMG|SVs_RMG))
2948 == (SVs_OBJECT|SVs_RMG))
2949 && strEQ(s=HvNAME(SvSTASH(sv)), "Regexp")
2950 && (mg = mg_find(sv, PERL_MAGIC_qr))) {
2951 regexp *re = (regexp *)mg->mg_obj;
2954 char *fptr = "msix";
2959 char need_newline = 0;
2960 U16 reganch = (U16)((re->reganch & PMf_COMPILETIME) >> 12);
2962 while((ch = *fptr++)) {
2964 reflags[left++] = ch;
2967 reflags[right--] = ch;
2972 reflags[left] = '-';
2976 mg->mg_len = re->prelen + 4 + left;
2978 * If /x was used, we have to worry about a regex
2979 * ending with a comment later being embedded
2980 * within another regex. If so, we don't want this
2981 * regex's "commentization" to leak out to the
2982 * right part of the enclosing regex, we must cap
2983 * it with a newline.
2985 * So, if /x was used, we scan backwards from the
2986 * end of the regex. If we find a '#' before we
2987 * find a newline, we need to add a newline
2988 * ourself. If we find a '\n' first (or if we
2989 * don't find '#' or '\n'), we don't need to add
2990 * anything. -jfriedl
2992 if (PMf_EXTENDED & re->reganch)
2994 char *endptr = re->precomp + re->prelen;
2995 while (endptr >= re->precomp)
2997 char c = *(endptr--);
2999 break; /* don't need another */
3001 /* we end while in a comment, so we
3003 mg->mg_len++; /* save space for it */
3004 need_newline = 1; /* note to add it */
3009 New(616, mg->mg_ptr, mg->mg_len + 1 + left, char);
3010 Copy("(?", mg->mg_ptr, 2, char);
3011 Copy(reflags, mg->mg_ptr+2, left, char);
3012 Copy(":", mg->mg_ptr+left+2, 1, char);
3013 Copy(re->precomp, mg->mg_ptr+3+left, re->prelen, char);
3015 mg->mg_ptr[mg->mg_len - 2] = '\n';
3016 mg->mg_ptr[mg->mg_len - 1] = ')';
3017 mg->mg_ptr[mg->mg_len] = 0;
3019 PL_reginterp_cnt += re->program[0].next_off;
3031 case SVt_PVBM: if (SvROK(sv))
3034 s = "SCALAR"; break;
3035 case SVt_PVLV: s = "LVALUE"; break;
3036 case SVt_PVAV: s = "ARRAY"; break;
3037 case SVt_PVHV: s = "HASH"; break;
3038 case SVt_PVCV: s = "CODE"; break;
3039 case SVt_PVGV: s = "GLOB"; break;
3040 case SVt_PVFM: s = "FORMAT"; break;
3041 case SVt_PVIO: s = "IO"; break;
3042 default: s = "UNKNOWN"; break;
3046 HV *svs = SvSTASH(sv);
3049 /* [20011101.072] This bandaid for C<package;>
3050 should eventually be removed. AMS 20011103 */
3051 (svs ? HvNAME(svs) : "<none>"), s
3056 Perl_sv_catpvf(aTHX_ tsv, "(0x%"UVxf")", PTR2UV(sv));
3062 if (SvREADONLY(sv) && !SvOK(sv)) {
3063 if (ckWARN(WARN_UNINITIALIZED))
3069 if (SvIOK(sv) || ((SvIOKp(sv) && !SvNOKp(sv)))) {
3070 /* I'm assuming that if both IV and NV are equally valid then
3071 converting the IV is going to be more efficient */
3072 U32 isIOK = SvIOK(sv);
3073 U32 isUIOK = SvIsUV(sv);
3074 char buf[TYPE_CHARS(UV)];
3077 if (SvTYPE(sv) < SVt_PVIV)
3078 sv_upgrade(sv, SVt_PVIV);
3080 ptr = uiv_2buf(buf, 0, SvUVX(sv), 1, &ebuf);
3082 ptr = uiv_2buf(buf, SvIVX(sv), 0, 0, &ebuf);
3083 SvGROW(sv, (STRLEN)(ebuf - ptr + 1)); /* inlined from sv_setpvn */
3084 Move(ptr,SvPVX(sv),ebuf - ptr,char);
3085 SvCUR_set(sv, ebuf - ptr);
3095 else if (SvNOKp(sv)) {
3096 if (SvTYPE(sv) < SVt_PVNV)
3097 sv_upgrade(sv, SVt_PVNV);
3098 /* The +20 is pure guesswork. Configure test needed. --jhi */
3099 SvGROW(sv, NV_DIG + 20);
3101 olderrno = errno; /* some Xenix systems wipe out errno here */
3103 if (SvNVX(sv) == 0.0)
3104 (void)strcpy(s,"0");
3108 Gconvert(SvNVX(sv), NV_DIG, 0, s);
3111 #ifdef FIXNEGATIVEZERO
3112 if (*s == '-' && s[1] == '0' && !s[2])
3122 if (ckWARN(WARN_UNINITIALIZED)
3123 && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP))
3126 if (SvTYPE(sv) < SVt_PV)
3127 /* Typically the caller expects that sv_any is not NULL now. */
3128 sv_upgrade(sv, SVt_PV);
3131 *lp = s - SvPVX(sv);
3134 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2pv(%s)\n",
3135 PTR2UV(sv),SvPVX(sv)));
3139 if (SvROK(sv)) { /* XXX Skip this when sv_pvn_force calls */
3140 /* Sneaky stuff here */
3144 tsv = newSVpv(tmpbuf, 0);
3160 len = strlen(tmpbuf);
3162 #ifdef FIXNEGATIVEZERO
3163 if (len == 2 && t[0] == '-' && t[1] == '0') {
3168 (void)SvUPGRADE(sv, SVt_PV);
3170 s = SvGROW(sv, len + 1);
3179 =for apidoc sv_copypv
3181 Copies a stringified representation of the source SV into the
3182 destination SV. Automatically performs any necessary mg_get and
3183 coercion of numeric values into strings. Guaranteed to preserve
3184 UTF-8 flag even from overloaded objects. Similar in nature to
3185 sv_2pv[_flags] but operates directly on an SV instead of just the
3186 string. Mostly uses sv_2pv_flags to do its work, except when that
3187 would lose the UTF-8'ness of the PV.
3193 Perl_sv_copypv(pTHX_ SV *dsv, register SV *ssv)
3197 if ( SvTHINKFIRST(ssv) && SvROK(ssv) && SvAMAGIC(ssv) &&
3198 (tmpsv = AMG_CALLun(ssv,string))) {
3199 if (SvTYPE(tmpsv) != SVt_RV || (SvRV(tmpsv) != SvRV(ssv))) {
3204 tmpsv = sv_newmortal();
3210 sv_setpvn(tmpsv,s,len);
3220 =for apidoc sv_2pvbyte_nolen
3222 Return a pointer to the byte-encoded representation of the SV.
3223 May cause the SV to be downgraded from UTF8 as a side-effect.
3225 Usually accessed via the C<SvPVbyte_nolen> macro.
3231 Perl_sv_2pvbyte_nolen(pTHX_ register SV *sv)
3234 return sv_2pvbyte(sv, &n_a);
3238 =for apidoc sv_2pvbyte
3240 Return a pointer to the byte-encoded representation of the SV, and set *lp
3241 to its length. May cause the SV to be downgraded from UTF8 as a
3244 Usually accessed via the C<SvPVbyte> macro.
3250 Perl_sv_2pvbyte(pTHX_ register SV *sv, STRLEN *lp)
3252 sv_utf8_downgrade(sv,0);
3253 return SvPV(sv,*lp);
3257 =for apidoc sv_2pvutf8_nolen
3259 Return a pointer to the UTF8-encoded representation of the SV.
3260 May cause the SV to be upgraded to UTF8 as a side-effect.
3262 Usually accessed via the C<SvPVutf8_nolen> macro.
3268 Perl_sv_2pvutf8_nolen(pTHX_ register SV *sv)
3271 return sv_2pvutf8(sv, &n_a);
3275 =for apidoc sv_2pvutf8
3277 Return a pointer to the UTF8-encoded representation of the SV, and set *lp
3278 to its length. May cause the SV to be upgraded to UTF8 as a side-effect.
3280 Usually accessed via the C<SvPVutf8> macro.
3286 Perl_sv_2pvutf8(pTHX_ register SV *sv, STRLEN *lp)
3288 sv_utf8_upgrade(sv);
3289 return SvPV(sv,*lp);
3293 =for apidoc sv_2bool
3295 This function is only called on magical items, and is only used by
3296 sv_true() or its macro equivalent.
3302 Perl_sv_2bool(pTHX_ register SV *sv)
3311 if (SvAMAGIC(sv) && (tmpsv=AMG_CALLun(sv,bool_)) &&
3312 (!SvROK(tmpsv) || (SvRV(tmpsv) != SvRV(sv))))
3313 return (bool)SvTRUE(tmpsv);
3314 return SvRV(sv) != 0;
3317 register XPV* Xpvtmp;
3318 if ((Xpvtmp = (XPV*)SvANY(sv)) &&
3319 (*Xpvtmp->xpv_pv > '0' ||
3320 Xpvtmp->xpv_cur > 1 ||
3321 (Xpvtmp->xpv_cur && *Xpvtmp->xpv_pv != '0')))
3328 return SvIVX(sv) != 0;
3331 return SvNVX(sv) != 0.0;
3339 =for apidoc sv_utf8_upgrade
3341 Convert the PV of an SV to its UTF8-encoded form.
3342 Forces the SV to string form if it is not already.
3343 Always sets the SvUTF8 flag to avoid future validity checks even
3344 if all the bytes have hibit clear.
3346 This is not as a general purpose byte encoding to Unicode interface:
3347 use the Encode extension for that.
3349 =for apidoc sv_utf8_upgrade_flags
3351 Convert the PV of an SV to its UTF8-encoded form.
3352 Forces the SV to string form if it is not already.
3353 Always sets the SvUTF8 flag to avoid future validity checks even
3354 if all the bytes have hibit clear. If C<flags> has C<SV_GMAGIC> bit set,
3355 will C<mg_get> on C<sv> if appropriate, else not. C<sv_utf8_upgrade> and
3356 C<sv_utf8_upgrade_nomg> are implemented in terms of this function.
3358 This is not as a general purpose byte encoding to Unicode interface:
3359 use the Encode extension for that.
3365 Perl_sv_utf8_upgrade_flags(pTHX_ register SV *sv, I32 flags)
3375 (void) sv_2pv_flags(sv,&len, flags);
3383 if (SvREADONLY(sv) && SvFAKE(sv)) {
3384 sv_force_normal(sv);
3388 sv_recode_to_utf8(sv, PL_encoding);
3389 else { /* Assume Latin-1/EBCDIC */
3390 /* This function could be much more efficient if we
3391 * had a FLAG in SVs to signal if there are any hibit
3392 * chars in the PV. Given that there isn't such a flag
3393 * make the loop as fast as possible. */
3394 s = (U8 *) SvPVX(sv);
3395 e = (U8 *) SvEND(sv);
3399 if ((hibit = !NATIVE_IS_INVARIANT(ch)))
3405 len = SvCUR(sv) + 1; /* Plus the \0 */
3406 SvPVX(sv) = (char*)bytes_to_utf8((U8*)s, &len);
3407 SvCUR(sv) = len - 1;
3409 Safefree(s); /* No longer using what was there before. */
3410 SvLEN(sv) = len; /* No longer know the real size. */
3412 /* Mark as UTF-8 even if no hibit - saves scanning loop */
3419 =for apidoc sv_utf8_downgrade
3421 Attempt to convert the PV of an SV from UTF8-encoded to byte encoding.
3422 This may not be possible if the PV contains non-byte encoding characters;
3423 if this is the case, either returns false or, if C<fail_ok> is not
3426 This is not as a general purpose Unicode to byte encoding interface:
3427 use the Encode extension for that.
3433 Perl_sv_utf8_downgrade(pTHX_ register SV* sv, bool fail_ok)
3435 if (SvPOK(sv) && SvUTF8(sv)) {
3440 if (SvREADONLY(sv) && SvFAKE(sv))
3441 sv_force_normal(sv);
3442 s = (U8 *) SvPV(sv, len);
3443 if (!utf8_to_bytes(s, &len)) {
3448 Perl_croak(aTHX_ "Wide character in %s",
3451 Perl_croak(aTHX_ "Wide character");
3462 =for apidoc sv_utf8_encode
3464 Convert the PV of an SV to UTF8-encoded, but then turn off the C<SvUTF8>
3465 flag so that it looks like octets again. Used as a building block
3466 for encode_utf8 in Encode.xs
3472 Perl_sv_utf8_encode(pTHX_ register SV *sv)
3474 (void) sv_utf8_upgrade(sv);
3479 =for apidoc sv_utf8_decode
3481 Convert the octets in the PV from UTF-8 to chars. Scan for validity and then
3482 turn off SvUTF8 if needed so that we see characters. Used as a building block
3483 for decode_utf8 in Encode.xs
3489 Perl_sv_utf8_decode(pTHX_ register SV *sv)
3495 /* The octets may have got themselves encoded - get them back as
3498 if (!sv_utf8_downgrade(sv, TRUE))
3501 /* it is actually just a matter of turning the utf8 flag on, but
3502 * we want to make sure everything inside is valid utf8 first.
3504 c = (U8 *) SvPVX(sv);
3505 if (!is_utf8_string(c, SvCUR(sv)+1))
3507 e = (U8 *) SvEND(sv);
3510 if (!UTF8_IS_INVARIANT(ch)) {
3520 =for apidoc sv_setsv
3522 Copies the contents of the source SV C<ssv> into the destination SV
3523 C<dsv>. The source SV may be destroyed if it is mortal, so don't use this
3524 function if the source SV needs to be reused. Does not handle 'set' magic.
3525 Loosely speaking, it performs a copy-by-value, obliterating any previous
3526 content of the destination.
3528 You probably want to use one of the assortment of wrappers, such as
3529 C<SvSetSV>, C<SvSetSV_nosteal>, C<SvSetMagicSV> and
3530 C<SvSetMagicSV_nosteal>.
3532 =for apidoc sv_setsv_flags
3534 Copies the contents of the source SV C<ssv> into the destination SV
3535 C<dsv>. The source SV may be destroyed if it is mortal, so don't use this
3536 function if the source SV needs to be reused. Does not handle 'set' magic.
3537 Loosely speaking, it performs a copy-by-value, obliterating any previous
3538 content of the destination.
3539 If the C<flags> parameter has the C<SV_GMAGIC> bit set, will C<mg_get> on
3540 C<ssv> if appropriate, else not. C<sv_setsv> and C<sv_setsv_nomg> are
3541 implemented in terms of this function.
3543 You probably want to use one of the assortment of wrappers, such as
3544 C<SvSetSV>, C<SvSetSV_nosteal>, C<SvSetMagicSV> and
3545 C<SvSetMagicSV_nosteal>.
3547 This is the primary function for copying scalars, and most other
3548 copy-ish functions and macros use this underneath.
3554 Perl_sv_setsv_flags(pTHX_ SV *dstr, register SV *sstr, I32 flags)
3556 register U32 sflags;
3562 SV_CHECK_THINKFIRST(dstr);
3564 sstr = &PL_sv_undef;
3565 stype = SvTYPE(sstr);
3566 dtype = SvTYPE(dstr);
3570 /* There's a lot of redundancy below but we're going for speed here */
3575 if (dtype != SVt_PVGV) {
3576 (void)SvOK_off(dstr);
3584 sv_upgrade(dstr, SVt_IV);
3587 sv_upgrade(dstr, SVt_PVNV);
3591 sv_upgrade(dstr, SVt_PVIV);
3594 (void)SvIOK_only(dstr);
3595 SvIVX(dstr) = SvIVX(sstr);
3598 if (SvTAINTED(sstr))
3609 sv_upgrade(dstr, SVt_NV);
3614 sv_upgrade(dstr, SVt_PVNV);
3617 SvNVX(dstr) = SvNVX(sstr);
3618 (void)SvNOK_only(dstr);
3619 if (SvTAINTED(sstr))
3627 sv_upgrade(dstr, SVt_RV);
3628 else if (dtype == SVt_PVGV &&
3629 SvTYPE(SvRV(sstr)) == SVt_PVGV) {
3632 if (GvIMPORTED(dstr) != GVf_IMPORTED
3633 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3635 GvIMPORTED_on(dstr);
3646 sv_upgrade(dstr, SVt_PV);
3649 if (dtype < SVt_PVIV)
3650 sv_upgrade(dstr, SVt_PVIV);
3653 if (dtype < SVt_PVNV)
3654 sv_upgrade(dstr, SVt_PVNV);
3661 Perl_croak(aTHX_ "Bizarre copy of %s in %s", sv_reftype(sstr, 0),
3664 Perl_croak(aTHX_ "Bizarre copy of %s", sv_reftype(sstr, 0));
3668 if (dtype <= SVt_PVGV) {
3670 if (dtype != SVt_PVGV) {
3671 char *name = GvNAME(sstr);
3672 STRLEN len = GvNAMELEN(sstr);
3673 sv_upgrade(dstr, SVt_PVGV);
3674 sv_magic(dstr, dstr, PERL_MAGIC_glob, Nullch, 0);
3675 GvSTASH(dstr) = (HV*)SvREFCNT_inc(GvSTASH(sstr));
3676 GvNAME(dstr) = savepvn(name, len);
3677 GvNAMELEN(dstr) = len;
3678 SvFAKE_on(dstr); /* can coerce to non-glob */
3680 /* ahem, death to those who redefine active sort subs */
3681 else if (PL_curstackinfo->si_type == PERLSI_SORT
3682 && GvCV(dstr) && PL_sortcop == CvSTART(GvCV(dstr)))
3683 Perl_croak(aTHX_ "Can't redefine active sort subroutine %s",
3686 #ifdef GV_UNIQUE_CHECK
3687 if (GvUNIQUE((GV*)dstr)) {
3688 Perl_croak(aTHX_ PL_no_modify);
3692 (void)SvOK_off(dstr);
3693 GvINTRO_off(dstr); /* one-shot flag */
3695 GvGP(dstr) = gp_ref(GvGP(sstr));
3696 if (SvTAINTED(sstr))
3698 if (GvIMPORTED(dstr) != GVf_IMPORTED
3699 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3701 GvIMPORTED_on(dstr);
3709 if (SvGMAGICAL(sstr) && (flags & SV_GMAGIC)) {
3711 if ((int)SvTYPE(sstr) != stype) {
3712 stype = SvTYPE(sstr);
3713 if (stype == SVt_PVGV && dtype <= SVt_PVGV)
3717 if (stype == SVt_PVLV)
3718 (void)SvUPGRADE(dstr, SVt_PVNV);
3720 (void)SvUPGRADE(dstr, (U32)stype);
3723 sflags = SvFLAGS(sstr);
3725 if (sflags & SVf_ROK) {
3726 if (dtype >= SVt_PV) {
3727 if (dtype == SVt_PVGV) {
3728 SV *sref = SvREFCNT_inc(SvRV(sstr));
3730 int intro = GvINTRO(dstr);
3732 #ifdef GV_UNIQUE_CHECK
3733 if (GvUNIQUE((GV*)dstr)) {
3734 Perl_croak(aTHX_ PL_no_modify);
3739 GvINTRO_off(dstr); /* one-shot flag */
3740 GvLINE(dstr) = CopLINE(PL_curcop);
3741 GvEGV(dstr) = (GV*)dstr;
3744 switch (SvTYPE(sref)) {
3747 SAVESPTR(GvAV(dstr));
3749 dref = (SV*)GvAV(dstr);
3750 GvAV(dstr) = (AV*)sref;
3751 if (!GvIMPORTED_AV(dstr)
3752 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3754 GvIMPORTED_AV_on(dstr);
3759 SAVESPTR(GvHV(dstr));
3761 dref = (SV*)GvHV(dstr);
3762 GvHV(dstr) = (HV*)sref;
3763 if (!GvIMPORTED_HV(dstr)
3764 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3766 GvIMPORTED_HV_on(dstr);
3771 if (GvCVGEN(dstr) && GvCV(dstr) != (CV*)sref) {
3772 SvREFCNT_dec(GvCV(dstr));
3773 GvCV(dstr) = Nullcv;
3774 GvCVGEN(dstr) = 0; /* Switch off cacheness. */
3775 PL_sub_generation++;
3777 SAVESPTR(GvCV(dstr));
3780 dref = (SV*)GvCV(dstr);
3781 if (GvCV(dstr) != (CV*)sref) {
3782 CV* cv = GvCV(dstr);
3784 if (!GvCVGEN((GV*)dstr) &&
3785 (CvROOT(cv) || CvXSUB(cv)))
3787 /* ahem, death to those who redefine
3788 * active sort subs */
3789 if (PL_curstackinfo->si_type == PERLSI_SORT &&
3790 PL_sortcop == CvSTART(cv))
3792 "Can't redefine active sort subroutine %s",
3793 GvENAME((GV*)dstr));
3794 /* Redefining a sub - warning is mandatory if
3795 it was a const and its value changed. */
3796 if (ckWARN(WARN_REDEFINE)
3798 && (!CvCONST((CV*)sref)
3799 || sv_cmp(cv_const_sv(cv),
3800 cv_const_sv((CV*)sref)))))
3802 Perl_warner(aTHX_ packWARN(WARN_REDEFINE),
3804 ? "Constant subroutine %s::%s redefined"
3805 : "Subroutine %s::%s redefined",
3806 HvNAME(GvSTASH((GV*)dstr)),
3807 GvENAME((GV*)dstr));
3811 cv_ckproto(cv, (GV*)dstr,
3812 SvPOK(sref) ? SvPVX(sref) : Nullch);
3814 GvCV(dstr) = (CV*)sref;
3815 GvCVGEN(dstr) = 0; /* Switch off cacheness. */
3816 GvASSUMECV_on(dstr);
3817 PL_sub_generation++;
3819 if (!GvIMPORTED_CV(dstr)
3820 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3822 GvIMPORTED_CV_on(dstr);
3827 SAVESPTR(GvIOp(dstr));
3829 dref = (SV*)GvIOp(dstr);
3830 GvIOp(dstr) = (IO*)sref;
3834 SAVESPTR(GvFORM(dstr));
3836 dref = (SV*)GvFORM(dstr);
3837 GvFORM(dstr) = (CV*)sref;
3841 SAVESPTR(GvSV(dstr));
3843 dref = (SV*)GvSV(dstr);
3845 if (!GvIMPORTED_SV(dstr)
3846 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3848 GvIMPORTED_SV_on(dstr);
3856 if (SvTAINTED(sstr))
3861 (void)SvOOK_off(dstr); /* backoff */
3863 Safefree(SvPVX(dstr));
3864 SvLEN(dstr)=SvCUR(dstr)=0;
3867 (void)SvOK_off(dstr);
3868 SvRV(dstr) = SvREFCNT_inc(SvRV(sstr));
3870 if (sflags & SVp_NOK) {
3872 /* Only set the public OK flag if the source has public OK. */
3873 if (sflags & SVf_NOK)
3874 SvFLAGS(dstr) |= SVf_NOK;
3875 SvNVX(dstr) = SvNVX(sstr);
3877 if (sflags & SVp_IOK) {
3878 (void)SvIOKp_on(dstr);
3879 if (sflags & SVf_IOK)
3880 SvFLAGS(dstr) |= SVf_IOK;
3881 if (sflags & SVf_IVisUV)
3883 SvIVX(dstr) = SvIVX(sstr);
3885 if (SvAMAGIC(sstr)) {
3889 else if (sflags & SVp_POK) {
3892 * Check to see if we can just swipe the string. If so, it's a
3893 * possible small lose on short strings, but a big win on long ones.
3894 * It might even be a win on short strings if SvPVX(dstr)
3895 * has to be allocated and SvPVX(sstr) has to be freed.
3898 if (SvTEMP(sstr) && /* slated for free anyway? */
3899 SvREFCNT(sstr) == 1 && /* and no other references to it? */
3900 !(sflags & SVf_OOK) && /* and not involved in OOK hack? */
3901 SvLEN(sstr) && /* and really is a string */
3902 /* and won't be needed again, potentially */
3903 !(PL_op && PL_op->op_type == OP_AASSIGN))
3905 if (SvPVX(dstr)) { /* we know that dtype >= SVt_PV */
3907 SvFLAGS(dstr) &= ~SVf_OOK;
3908 Safefree(SvPVX(dstr) - SvIVX(dstr));
3910 else if (SvLEN(dstr))
3911 Safefree(SvPVX(dstr));
3913 (void)SvPOK_only(dstr);
3914 SvPV_set(dstr, SvPVX(sstr));
3915 SvLEN_set(dstr, SvLEN(sstr));
3916 SvCUR_set(dstr, SvCUR(sstr));
3919 (void)SvOK_off(sstr); /* NOTE: nukes most SvFLAGS on sstr */
3920 SvPV_set(sstr, Nullch);
3925 else { /* have to copy actual string */
3926 STRLEN len = SvCUR(sstr);
3927 SvGROW(dstr, len + 1); /* inlined from sv_setpvn */
3928 Move(SvPVX(sstr),SvPVX(dstr),len,char);
3929 SvCUR_set(dstr, len);
3930 *SvEND(dstr) = '\0';
3931 (void)SvPOK_only(dstr);
3933 if (sflags & SVf_UTF8)
3936 if (sflags & SVp_NOK) {
3938 if (sflags & SVf_NOK)
3939 SvFLAGS(dstr) |= SVf_NOK;
3940 SvNVX(dstr) = SvNVX(sstr);
3942 if (sflags & SVp_IOK) {
3943 (void)SvIOKp_on(dstr);
3944 if (sflags & SVf_IOK)
3945 SvFLAGS(dstr) |= SVf_IOK;
3946 if (sflags & SVf_IVisUV)
3948 SvIVX(dstr) = SvIVX(sstr);
3951 else if (sflags & SVp_IOK) {
3952 if (sflags & SVf_IOK)
3953 (void)SvIOK_only(dstr);
3955 (void)SvOK_off(dstr);
3956 (void)SvIOKp_on(dstr);
3958 /* XXXX Do we want to set IsUV for IV(ROK)? Be extra safe... */
3959 if (sflags & SVf_IVisUV)
3961 SvIVX(dstr) = SvIVX(sstr);
3962 if (sflags & SVp_NOK) {
3963 if (sflags & SVf_NOK)
3964 (void)SvNOK_on(dstr);
3966 (void)SvNOKp_on(dstr);
3967 SvNVX(dstr) = SvNVX(sstr);
3970 else if (sflags & SVp_NOK) {
3971 if (sflags & SVf_NOK)
3972 (void)SvNOK_only(dstr);
3974 (void)SvOK_off(dstr);
3977 SvNVX(dstr) = SvNVX(sstr);
3980 if (dtype == SVt_PVGV) {
3981 if (ckWARN(WARN_MISC))
3982 Perl_warner(aTHX_ packWARN(WARN_MISC), "Undefined value assigned to typeglob");
3985 (void)SvOK_off(dstr);
3987 if (SvTAINTED(sstr))
3992 =for apidoc sv_setsv_mg
3994 Like C<sv_setsv>, but also handles 'set' magic.
4000 Perl_sv_setsv_mg(pTHX_ SV *dstr, register SV *sstr)
4002 sv_setsv(dstr,sstr);
4007 =for apidoc sv_setpvn
4009 Copies a string into an SV. The C<len> parameter indicates the number of
4010 bytes to be copied. Does not handle 'set' magic. See C<sv_setpvn_mg>.
4016 Perl_sv_setpvn(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
4018 register char *dptr;
4020 SV_CHECK_THINKFIRST(sv);
4026 /* len is STRLEN which is unsigned, need to copy to signed */
4029 Perl_croak(aTHX_ "panic: sv_setpvn called with negative strlen");
4031 (void)SvUPGRADE(sv, SVt_PV);
4033 SvGROW(sv, len + 1);
4035 Move(ptr,dptr,len,char);
4038 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4043 =for apidoc sv_setpvn_mg
4045 Like C<sv_setpvn>, but also handles 'set' magic.
4051 Perl_sv_setpvn_mg(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
4053 sv_setpvn(sv,ptr,len);
4058 =for apidoc sv_setpv
4060 Copies a string into an SV. The string must be null-terminated. Does not
4061 handle 'set' magic. See C<sv_setpv_mg>.
4067 Perl_sv_setpv(pTHX_ register SV *sv, register const char *ptr)
4069 register STRLEN len;
4071 SV_CHECK_THINKFIRST(sv);
4077 (void)SvUPGRADE(sv, SVt_PV);
4079 SvGROW(sv, len + 1);
4080 Move(ptr,SvPVX(sv),len+1,char);
4082 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4087 =for apidoc sv_setpv_mg
4089 Like C<sv_setpv>, but also handles 'set' magic.
4095 Perl_sv_setpv_mg(pTHX_ register SV *sv, register const char *ptr)
4102 =for apidoc sv_usepvn
4104 Tells an SV to use C<ptr> to find its string value. Normally the string is
4105 stored inside the SV but sv_usepvn allows the SV to use an outside string.
4106 The C<ptr> should point to memory that was allocated by C<malloc>. The
4107 string length, C<len>, must be supplied. This function will realloc the
4108 memory pointed to by C<ptr>, so that pointer should not be freed or used by
4109 the programmer after giving it to sv_usepvn. Does not handle 'set' magic.
4110 See C<sv_usepvn_mg>.
4116 Perl_sv_usepvn(pTHX_ register SV *sv, register char *ptr, register STRLEN len)
4118 SV_CHECK_THINKFIRST(sv);
4119 (void)SvUPGRADE(sv, SVt_PV);
4124 (void)SvOOK_off(sv);
4125 if (SvPVX(sv) && SvLEN(sv))
4126 Safefree(SvPVX(sv));
4127 Renew(ptr, len+1, char);
4130 SvLEN_set(sv, len+1);
4132 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4137 =for apidoc sv_usepvn_mg
4139 Like C<sv_usepvn>, but also handles 'set' magic.
4145 Perl_sv_usepvn_mg(pTHX_ register SV *sv, register char *ptr, register STRLEN len)
4147 sv_usepvn(sv,ptr,len);
4152 =for apidoc sv_force_normal_flags
4154 Undo various types of fakery on an SV: if the PV is a shared string, make
4155 a private copy; if we're a ref, stop refing; if we're a glob, downgrade to
4156 an xpvmg. The C<flags> parameter gets passed to C<sv_unref_flags()>
4157 when unrefing. C<sv_force_normal> calls this function with flags set to 0.
4163 Perl_sv_force_normal_flags(pTHX_ register SV *sv, U32 flags)
4165 if (SvREADONLY(sv)) {
4167 char *pvx = SvPVX(sv);
4168 STRLEN len = SvCUR(sv);
4169 U32 hash = SvUVX(sv);
4170 SvGROW(sv, len + 1);
4171 Move(pvx,SvPVX(sv),len,char);
4175 unsharepvn(pvx, SvUTF8(sv) ? -(I32)len : len, hash);
4177 else if (PL_curcop != &PL_compiling)
4178 Perl_croak(aTHX_ PL_no_modify);
4181 sv_unref_flags(sv, flags);
4182 else if (SvFAKE(sv) && SvTYPE(sv) == SVt_PVGV)
4187 =for apidoc sv_force_normal
4189 Undo various types of fakery on an SV: if the PV is a shared string, make
4190 a private copy; if we're a ref, stop refing; if we're a glob, downgrade to
4191 an xpvmg. See also C<sv_force_normal_flags>.
4197 Perl_sv_force_normal(pTHX_ register SV *sv)
4199 sv_force_normal_flags(sv, 0);
4205 Efficient removal of characters from the beginning of the string buffer.
4206 SvPOK(sv) must be true and the C<ptr> must be a pointer to somewhere inside
4207 the string buffer. The C<ptr> becomes the first character of the adjusted
4208 string. Uses the "OOK hack".
4214 Perl_sv_chop(pTHX_ register SV *sv, register char *ptr)
4216 register STRLEN delta;
4218 if (!ptr || !SvPOKp(sv))
4220 SV_CHECK_THINKFIRST(sv);
4221 if (SvTYPE(sv) < SVt_PVIV)
4222 sv_upgrade(sv,SVt_PVIV);
4225 if (!SvLEN(sv)) { /* make copy of shared string */
4226 char *pvx = SvPVX(sv);
4227 STRLEN len = SvCUR(sv);
4228 SvGROW(sv, len + 1);
4229 Move(pvx,SvPVX(sv),len,char);
4233 SvFLAGS(sv) |= SVf_OOK;
4235 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVp_IOK|SVp_NOK|SVf_IVisUV);
4236 delta = ptr - SvPVX(sv);
4244 =for apidoc sv_catpvn
4246 Concatenates the string onto the end of the string which is in the SV. The
4247 C<len> indicates number of bytes to copy. If the SV has the UTF8
4248 status set, then the bytes appended should be valid UTF8.
4249 Handles 'get' magic, but not 'set' magic. See C<sv_catpvn_mg>.
4251 =for apidoc sv_catpvn_flags
4253 Concatenates the string onto the end of the string which is in the SV. The
4254 C<len> indicates number of bytes to copy. If the SV has the UTF8
4255 status set, then the bytes appended should be valid UTF8.
4256 If C<flags> has C<SV_GMAGIC> bit set, will C<mg_get> on C<dsv> if
4257 appropriate, else not. C<sv_catpvn> and C<sv_catpvn_nomg> are implemented
4258 in terms of this function.
4264 Perl_sv_catpvn_flags(pTHX_ register SV *dsv, register const char *sstr, register STRLEN slen, I32 flags)
4269 dstr = SvPV_force_flags(dsv, dlen, flags);
4270 SvGROW(dsv, dlen + slen + 1);
4273 Move(sstr, SvPVX(dsv) + dlen, slen, char);
4276 (void)SvPOK_only_UTF8(dsv); /* validate pointer */
4281 =for apidoc sv_catpvn_mg
4283 Like C<sv_catpvn>, but also handles 'set' magic.
4289 Perl_sv_catpvn_mg(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
4291 sv_catpvn(sv,ptr,len);
4296 =for apidoc sv_catsv
4298 Concatenates the string from SV C<ssv> onto the end of the string in
4299 SV C<dsv>. Modifies C<dsv> but not C<ssv>. Handles 'get' magic, but
4300 not 'set' magic. See C<sv_catsv_mg>.
4302 =for apidoc sv_catsv_flags
4304 Concatenates the string from SV C<ssv> onto the end of the string in
4305 SV C<dsv>. Modifies C<dsv> but not C<ssv>. If C<flags> has C<SV_GMAGIC>
4306 bit set, will C<mg_get> on the SVs if appropriate, else not. C<sv_catsv>
4307 and C<sv_catsv_nomg> are implemented in terms of this function.
4312 Perl_sv_catsv_flags(pTHX_ SV *dsv, register SV *ssv, I32 flags)
4318 if ((spv = SvPV(ssv, slen))) {
4319 /* sutf8 and dutf8 were type bool, but under USE_ITHREADS,
4320 gcc version 2.95.2 20000220 (Debian GNU/Linux) for
4321 Linux xxx 2.2.17 on sparc64 with gcc -O2, we erroneously
4322 get dutf8 = 0x20000000, (i.e. SVf_UTF8) even though
4323 dsv->sv_flags doesn't have that bit set.
4324 Andy Dougherty 12 Oct 2001
4326 I32 sutf8 = DO_UTF8(ssv);
4329 if (SvGMAGICAL(dsv) && (flags & SV_GMAGIC))
4331 dutf8 = DO_UTF8(dsv);
4333 if (dutf8 != sutf8) {
4335 /* Not modifying source SV, so taking a temporary copy. */
4336 SV* csv = sv_2mortal(newSVpvn(spv, slen));
4338 sv_utf8_upgrade(csv);
4339 spv = SvPV(csv, slen);
4342 sv_utf8_upgrade_nomg(dsv);
4344 sv_catpvn_nomg(dsv, spv, slen);
4349 =for apidoc sv_catsv_mg
4351 Like C<sv_catsv>, but also handles 'set' magic.
4357 Perl_sv_catsv_mg(pTHX_ SV *dsv, register SV *ssv)
4364 =for apidoc sv_catpv
4366 Concatenates the string onto the end of the string which is in the SV.
4367 If the SV has the UTF8 status set, then the bytes appended should be
4368 valid UTF8. Handles 'get' magic, but not 'set' magic. See C<sv_catpv_mg>.
4373 Perl_sv_catpv(pTHX_ register SV *sv, register const char *ptr)
4375 register STRLEN len;
4381 junk = SvPV_force(sv, tlen);
4383 SvGROW(sv, tlen + len + 1);
4386 Move(ptr,SvPVX(sv)+tlen,len+1,char);
4388 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4393 =for apidoc sv_catpv_mg
4395 Like C<sv_catpv>, but also handles 'set' magic.
4401 Perl_sv_catpv_mg(pTHX_ register SV *sv, register const char *ptr)
4410 Create a new null SV, or if len > 0, create a new empty SVt_PV type SV
4411 with an initial PV allocation of len+1. Normally accessed via the C<NEWSV>
4418 Perl_newSV(pTHX_ STRLEN len)
4424 sv_upgrade(sv, SVt_PV);
4425 SvGROW(sv, len + 1);
4430 =for apidoc sv_magicext
4432 Adds magic to an SV, upgrading it if necessary. Applies the
4433 supplied vtable and returns pointer to the magic added.
4435 Note that sv_magicext will allow things that sv_magic will not.
4436 In particular you can add magic to SvREADONLY SVs and and more than
4437 one instance of the same 'how'
4439 I C<namelen> is greater then zero then a savepvn() I<copy> of C<name> is stored,
4440 if C<namelen> is zero then C<name> is stored as-is and - as another special
4441 case - if C<(name && namelen == HEf_SVKEY)> then C<name> is assumed to contain
4442 an C<SV*> and has its REFCNT incremented
4444 (This is now used as a subroutine by sv_magic.)
4449 Perl_sv_magicext(pTHX_ SV* sv, SV* obj, int how, MGVTBL *vtable,
4450 const char* name, I32 namlen)
4454 if (SvTYPE(sv) < SVt_PVMG) {
4455 (void)SvUPGRADE(sv, SVt_PVMG);
4457 Newz(702,mg, 1, MAGIC);
4458 mg->mg_moremagic = SvMAGIC(sv);
4461 /* Some magic sontains a reference loop, where the sv and object refer to
4462 each other. To prevent a reference loop that would prevent such
4463 objects being freed, we look for such loops and if we find one we
4464 avoid incrementing the object refcount. */
4465 if (!obj || obj == sv ||
4466 how == PERL_MAGIC_arylen ||
4467 how == PERL_MAGIC_qr ||
4468 (SvTYPE(obj) == SVt_PVGV &&
4469 (GvSV(obj) == sv || GvHV(obj) == (HV*)sv || GvAV(obj) == (AV*)sv ||
4470 GvCV(obj) == (CV*)sv || GvIOp(obj) == (IO*)sv ||
4471 GvFORM(obj) == (CV*)sv)) ||
4472 (how == PERL_MAGIC_tiedscalar &&
4473 SvROK(obj) && (SvRV(obj) == sv || GvIO(SvRV(obj)) == (IO*)sv)))
4478 mg->mg_obj = SvREFCNT_inc(obj);
4479 mg->mg_flags |= MGf_REFCOUNTED;
4482 mg->mg_len = namlen;
4485 mg->mg_ptr = savepvn(name, namlen);
4486 else if (namlen == HEf_SVKEY)
4487 mg->mg_ptr = (char*)SvREFCNT_inc((SV*)name);
4489 mg->mg_ptr = (char *) name;
4491 mg->mg_virtual = vtable;
4495 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
4500 =for apidoc sv_magic
4502 Adds magic to an SV. First upgrades C<sv> to type C<SVt_PVMG> if necessary,
4503 then adds a new magic item of type C<how> to the head of the magic list.
4509 Perl_sv_magic(pTHX_ register SV *sv, SV *obj, int how, const char *name, I32 namlen)
4514 if (SvREADONLY(sv)) {
4515 if (PL_curcop != &PL_compiling
4516 && how != PERL_MAGIC_regex_global
4517 && how != PERL_MAGIC_bm
4518 && how != PERL_MAGIC_fm
4519 && how != PERL_MAGIC_sv
4522 Perl_croak(aTHX_ PL_no_modify);
4525 if (SvMAGICAL(sv) || (how == PERL_MAGIC_taint && SvTYPE(sv) >= SVt_PVMG)) {
4526 if (SvMAGIC(sv) && (mg = mg_find(sv, how))) {
4527 /* sv_magic() refuses to add a magic of the same 'how' as an
4530 if (how == PERL_MAGIC_taint)
4538 vtable = &PL_vtbl_sv;
4540 case PERL_MAGIC_overload:
4541 vtable = &PL_vtbl_amagic;
4543 case PERL_MAGIC_overload_elem:
4544 vtable = &PL_vtbl_amagicelem;
4546 case PERL_MAGIC_overload_table:
4547 vtable = &PL_vtbl_ovrld;
4550 vtable = &PL_vtbl_bm;
4552 case PERL_MAGIC_regdata:
4553 vtable = &PL_vtbl_regdata;
4555 case PERL_MAGIC_regdatum:
4556 vtable = &PL_vtbl_regdatum;
4558 case PERL_MAGIC_env:
4559 vtable = &PL_vtbl_env;
4562 vtable = &PL_vtbl_fm;
4564 case PERL_MAGIC_envelem:
4565 vtable = &PL_vtbl_envelem;
4567 case PERL_MAGIC_regex_global:
4568 vtable = &PL_vtbl_mglob;
4570 case PERL_MAGIC_isa:
4571 vtable = &PL_vtbl_isa;
4573 case PERL_MAGIC_isaelem:
4574 vtable = &PL_vtbl_isaelem;
4576 case PERL_MAGIC_nkeys:
4577 vtable = &PL_vtbl_nkeys;
4579 case PERL_MAGIC_dbfile:
4582 case PERL_MAGIC_dbline:
4583 vtable = &PL_vtbl_dbline;
4585 #ifdef USE_5005THREADS
4586 case PERL_MAGIC_mutex:
4587 vtable = &PL_vtbl_mutex;
4589 #endif /* USE_5005THREADS */
4590 #ifdef USE_LOCALE_COLLATE
4591 case PERL_MAGIC_collxfrm:
4592 vtable = &PL_vtbl_collxfrm;
4594 #endif /* USE_LOCALE_COLLATE */
4595 case PERL_MAGIC_tied:
4596 vtable = &PL_vtbl_pack;
4598 case PERL_MAGIC_tiedelem:
4599 case PERL_MAGIC_tiedscalar:
4600 vtable = &PL_vtbl_packelem;
4603 vtable = &PL_vtbl_regexp;
4605 case PERL_MAGIC_sig:
4606 vtable = &PL_vtbl_sig;
4608 case PERL_MAGIC_sigelem:
4609 vtable = &PL_vtbl_sigelem;
4611 case PERL_MAGIC_taint:
4612 vtable = &PL_vtbl_taint;
4614 case PERL_MAGIC_uvar:
4615 vtable = &PL_vtbl_uvar;
4617 case PERL_MAGIC_vec:
4618 vtable = &PL_vtbl_vec;
4620 case PERL_MAGIC_substr:
4621 vtable = &PL_vtbl_substr;
4623 case PERL_MAGIC_defelem:
4624 vtable = &PL_vtbl_defelem;
4626 case PERL_MAGIC_glob:
4627 vtable = &PL_vtbl_glob;
4629 case PERL_MAGIC_arylen:
4630 vtable = &PL_vtbl_arylen;
4632 case PERL_MAGIC_pos:
4633 vtable = &PL_vtbl_pos;
4635 case PERL_MAGIC_backref:
4636 vtable = &PL_vtbl_backref;
4638 case PERL_MAGIC_ext:
4639 /* Reserved for use by extensions not perl internals. */
4640 /* Useful for attaching extension internal data to perl vars. */
4641 /* Note that multiple extensions may clash if magical scalars */
4642 /* etc holding private data from one are passed to another. */
4645 Perl_croak(aTHX_ "Don't know how to handle magic of type \\%o", how);
4648 /* Rest of work is done else where */
4649 mg = sv_magicext(sv,obj,how,vtable,name,namlen);
4652 case PERL_MAGIC_taint:
4655 case PERL_MAGIC_ext:
4656 case PERL_MAGIC_dbfile:
4663 =for apidoc sv_unmagic
4665 Removes all magic of type C<type> from an SV.
4671 Perl_sv_unmagic(pTHX_ SV *sv, int type)
4675 if (SvTYPE(sv) < SVt_PVMG || !SvMAGIC(sv))
4678 for (mg = *mgp; mg; mg = *mgp) {
4679 if (mg->mg_type == type) {
4680 MGVTBL* vtbl = mg->mg_virtual;
4681 *mgp = mg->mg_moremagic;
4682 if (vtbl && vtbl->svt_free)
4683 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
4684 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
4686 Safefree(mg->mg_ptr);
4687 else if (mg->mg_len == HEf_SVKEY)
4688 SvREFCNT_dec((SV*)mg->mg_ptr);
4690 if (mg->mg_flags & MGf_REFCOUNTED)
4691 SvREFCNT_dec(mg->mg_obj);
4695 mgp = &mg->mg_moremagic;
4699 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_NOK|SVp_POK)) >> PRIVSHIFT;
4706 =for apidoc sv_rvweaken
4708 Weaken a reference: set the C<SvWEAKREF> flag on this RV; give the
4709 referred-to SV C<PERL_MAGIC_backref> magic if it hasn't already; and
4710 push a back-reference to this RV onto the array of backreferences
4711 associated with that magic.
4717 Perl_sv_rvweaken(pTHX_ SV *sv)
4720 if (!SvOK(sv)) /* let undefs pass */
4723 Perl_croak(aTHX_ "Can't weaken a nonreference");
4724 else if (SvWEAKREF(sv)) {
4725 if (ckWARN(WARN_MISC))
4726 Perl_warner(aTHX_ packWARN(WARN_MISC), "Reference is already weak");
4730 sv_add_backref(tsv, sv);
4736 /* Give tsv backref magic if it hasn't already got it, then push a
4737 * back-reference to sv onto the array associated with the backref magic.
4741 S_sv_add_backref(pTHX_ SV *tsv, SV *sv)
4745 if (SvMAGICAL(tsv) && (mg = mg_find(tsv, PERL_MAGIC_backref)))
4746 av = (AV*)mg->mg_obj;
4749 sv_magic(tsv, (SV*)av, PERL_MAGIC_backref, NULL, 0);
4750 SvREFCNT_dec(av); /* for sv_magic */
4755 /* delete a back-reference to ourselves from the backref magic associated
4756 * with the SV we point to.
4760 S_sv_del_backref(pTHX_ SV *sv)
4767 if (!SvMAGICAL(tsv) || !(mg = mg_find(tsv, PERL_MAGIC_backref)))
4768 Perl_croak(aTHX_ "panic: del_backref");
4769 av = (AV *)mg->mg_obj;
4774 svp[i] = &PL_sv_undef; /* XXX */
4781 =for apidoc sv_insert
4783 Inserts a string at the specified offset/length within the SV. Similar to
4784 the Perl substr() function.
4790 Perl_sv_insert(pTHX_ SV *bigstr, STRLEN offset, STRLEN len, char *little, STRLEN littlelen)
4794 register char *midend;
4795 register char *bigend;
4801 Perl_croak(aTHX_ "Can't modify non-existent substring");
4802 SvPV_force(bigstr, curlen);
4803 (void)SvPOK_only_UTF8(bigstr);
4804 if (offset + len > curlen) {
4805 SvGROW(bigstr, offset+len+1);
4806 Zero(SvPVX(bigstr)+curlen, offset+len-curlen, char);
4807 SvCUR_set(bigstr, offset+len);
4811 i = littlelen - len;
4812 if (i > 0) { /* string might grow */
4813 big = SvGROW(bigstr, SvCUR(bigstr) + i + 1);
4814 mid = big + offset + len;
4815 midend = bigend = big + SvCUR(bigstr);
4818 while (midend > mid) /* shove everything down */
4819 *--bigend = *--midend;
4820 Move(little,big+offset,littlelen,char);
4826 Move(little,SvPVX(bigstr)+offset,len,char);
4831 big = SvPVX(bigstr);
4834 bigend = big + SvCUR(bigstr);
4836 if (midend > bigend)
4837 Perl_croak(aTHX_ "panic: sv_insert");
4839 if (mid - big > bigend - midend) { /* faster to shorten from end */
4841 Move(little, mid, littlelen,char);
4844 i = bigend - midend;
4846 Move(midend, mid, i,char);
4850 SvCUR_set(bigstr, mid - big);
4853 else if ((i = mid - big)) { /* faster from front */
4854 midend -= littlelen;
4856 sv_chop(bigstr,midend-i);
4861 Move(little, mid, littlelen,char);
4863 else if (littlelen) {
4864 midend -= littlelen;
4865 sv_chop(bigstr,midend);
4866 Move(little,midend,littlelen,char);
4869 sv_chop(bigstr,midend);
4875 =for apidoc sv_replace
4877 Make the first argument a copy of the second, then delete the original.
4878 The target SV physically takes over ownership of the body of the source SV
4879 and inherits its flags; however, the target keeps any magic it owns,
4880 and any magic in the source is discarded.
4881 Note that this is a rather specialist SV copying operation; most of the
4882 time you'll want to use C<sv_setsv> or one of its many macro front-ends.
4888 Perl_sv_replace(pTHX_ register SV *sv, register SV *nsv)
4890 U32 refcnt = SvREFCNT(sv);
4891 SV_CHECK_THINKFIRST(sv);
4892 if (SvREFCNT(nsv) != 1 && ckWARN_d(WARN_INTERNAL))
4893 Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Reference miscount in sv_replace()");
4894 if (SvMAGICAL(sv)) {
4898 sv_upgrade(nsv, SVt_PVMG);
4899 SvMAGIC(nsv) = SvMAGIC(sv);
4900 SvFLAGS(nsv) |= SvMAGICAL(sv);
4906 assert(!SvREFCNT(sv));
4907 StructCopy(nsv,sv,SV);
4908 SvREFCNT(sv) = refcnt;
4909 SvFLAGS(nsv) |= SVTYPEMASK; /* Mark as freed */
4914 =for apidoc sv_clear
4916 Clear an SV: call any destructors, free up any memory used by the body,
4917 and free the body itself. The SV's head is I<not> freed, although
4918 its type is set to all 1's so that it won't inadvertently be assumed
4919 to be live during global destruction etc.
4920 This function should only be called when REFCNT is zero. Most of the time
4921 you'll want to call C<sv_free()> (or its macro wrapper C<SvREFCNT_dec>)
4928 Perl_sv_clear(pTHX_ register SV *sv)
4932 assert(SvREFCNT(sv) == 0);
4935 if (PL_defstash) { /* Still have a symbol table? */
4940 Zero(&tmpref, 1, SV);
4941 sv_upgrade(&tmpref, SVt_RV);
4943 SvREADONLY_on(&tmpref); /* DESTROY() could be naughty */
4944 SvREFCNT(&tmpref) = 1;
4947 stash = SvSTASH(sv);
4948 destructor = StashHANDLER(stash,DESTROY);
4951 PUSHSTACKi(PERLSI_DESTROY);
4952 SvRV(&tmpref) = SvREFCNT_inc(sv);
4957 call_sv((SV*)destructor, G_DISCARD|G_EVAL|G_KEEPERR);
4963 } while (SvOBJECT(sv) && SvSTASH(sv) != stash);
4965 del_XRV(SvANY(&tmpref));
4968 if (PL_in_clean_objs)
4969 Perl_croak(aTHX_ "DESTROY created new reference to dead object '%s'",
4971 /* DESTROY gave object new lease on life */
4977 SvREFCNT_dec(SvSTASH(sv)); /* possibly of changed persuasion */
4978 SvOBJECT_off(sv); /* Curse the object. */
4979 if (SvTYPE(sv) != SVt_PVIO)
4980 --PL_sv_objcount; /* XXX Might want something more general */
4983 if (SvTYPE(sv) >= SVt_PVMG) {
4986 if (SvFLAGS(sv) & SVpad_TYPED)
4987 SvREFCNT_dec(SvSTASH(sv));
4990 switch (SvTYPE(sv)) {
4993 IoIFP(sv) != PerlIO_stdin() &&
4994 IoIFP(sv) != PerlIO_stdout() &&
4995 IoIFP(sv) != PerlIO_stderr())
4997 io_close((IO*)sv, FALSE);
4999 if (IoDIRP(sv) && !(IoFLAGS(sv) & IOf_FAKE_DIRP))
5000 PerlDir_close(IoDIRP(sv));
5001 IoDIRP(sv) = (DIR*)NULL;
5002 Safefree(IoTOP_NAME(sv));
5003 Safefree(IoFMT_NAME(sv));
5004 Safefree(IoBOTTOM_NAME(sv));
5019 SvREFCNT_dec(LvTARG(sv));
5023 Safefree(GvNAME(sv));
5024 /* cannot decrease stash refcount yet, as we might recursively delete
5025 ourselves when the refcnt drops to zero. Delay SvREFCNT_dec
5026 of stash until current sv is completely gone.
5027 -- JohnPC, 27 Mar 1998 */
5028 stash = GvSTASH(sv);
5034 (void)SvOOK_off(sv);
5042 SvREFCNT_dec(SvRV(sv));
5044 else if (SvPVX(sv) && SvLEN(sv))
5045 Safefree(SvPVX(sv));
5046 else if (SvPVX(sv) && SvREADONLY(sv) && SvFAKE(sv)) {
5047 unsharepvn(SvPVX(sv),
5048 SvUTF8(sv) ? -(I32)SvCUR(sv) : SvCUR(sv),
5061 switch (SvTYPE(sv)) {
5077 del_XPVIV(SvANY(sv));
5080 del_XPVNV(SvANY(sv));
5083 del_XPVMG(SvANY(sv));
5086 del_XPVLV(SvANY(sv));
5089 del_XPVAV(SvANY(sv));
5092 del_XPVHV(SvANY(sv));
5095 del_XPVCV(SvANY(sv));
5098 del_XPVGV(SvANY(sv));
5099 /* code duplication for increased performance. */
5100 SvFLAGS(sv) &= SVf_BREAK;
5101 SvFLAGS(sv) |= SVTYPEMASK;
5102 /* decrease refcount of the stash that owns this GV, if any */
5104 SvREFCNT_dec(stash);
5105 return; /* not break, SvFLAGS reset already happened */
5107 del_XPVBM(SvANY(sv));
5110 del_XPVFM(SvANY(sv));
5113 del_XPVIO(SvANY(sv));
5116 SvFLAGS(sv) &= SVf_BREAK;
5117 SvFLAGS(sv) |= SVTYPEMASK;
5121 =for apidoc sv_newref
5123 Increment an SV's reference count. Use the C<SvREFCNT_inc()> wrapper
5130 Perl_sv_newref(pTHX_ SV *sv)
5133 ATOMIC_INC(SvREFCNT(sv));
5140 Decrement an SV's reference count, and if it drops to zero, call
5141 C<sv_clear> to invoke destructors and free up any memory used by
5142 the body; finally, deallocate the SV's head itself.
5143 Normally called via a wrapper macro C<SvREFCNT_dec>.
5149 Perl_sv_free(pTHX_ SV *sv)
5151 int refcount_is_zero;
5155 if (SvREFCNT(sv) == 0) {
5156 if (SvFLAGS(sv) & SVf_BREAK)
5157 /* this SV's refcnt has been artificially decremented to
5158 * trigger cleanup */
5160 if (PL_in_clean_all) /* All is fair */
5162 if (SvREADONLY(sv) && SvIMMORTAL(sv)) {
5163 /* make sure SvREFCNT(sv)==0 happens very seldom */
5164 SvREFCNT(sv) = (~(U32)0)/2;
5167 if (ckWARN_d(WARN_INTERNAL))
5168 Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Attempt to free unreferenced scalar");
5171 ATOMIC_DEC_AND_TEST(refcount_is_zero, SvREFCNT(sv));
5172 if (!refcount_is_zero)
5176 if (ckWARN_d(WARN_DEBUGGING))
5177 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
5178 "Attempt to free temp prematurely: SV 0x%"UVxf,
5183 if (SvREADONLY(sv) && SvIMMORTAL(sv)) {
5184 /* make sure SvREFCNT(sv)==0 happens very seldom */
5185 SvREFCNT(sv) = (~(U32)0)/2;
5196 Returns the length of the string in the SV. Handles magic and type
5197 coercion. See also C<SvCUR>, which gives raw access to the xpv_cur slot.
5203 Perl_sv_len(pTHX_ register SV *sv)
5211 len = mg_length(sv);
5213 (void)SvPV(sv, len);
5218 =for apidoc sv_len_utf8
5220 Returns the number of characters in the string in an SV, counting wide
5221 UTF8 bytes as a single character. Handles magic and type coercion.
5227 Perl_sv_len_utf8(pTHX_ register SV *sv)
5233 return mg_length(sv);
5237 U8 *s = (U8*)SvPV(sv, len);
5239 return Perl_utf8_length(aTHX_ s, s + len);
5244 =for apidoc sv_pos_u2b
5246 Converts the value pointed to by offsetp from a count of UTF8 chars from
5247 the start of the string, to a count of the equivalent number of bytes; if
5248 lenp is non-zero, it does the same to lenp, but this time starting from
5249 the offset, rather than from the start of the string. Handles magic and
5256 Perl_sv_pos_u2b(pTHX_ register SV *sv, I32* offsetp, I32* lenp)
5261 I32 uoffset = *offsetp;
5267 start = s = (U8*)SvPV(sv, len);
5269 while (s < send && uoffset--)
5273 *offsetp = s - start;
5277 while (s < send && ulen--)
5287 =for apidoc sv_pos_b2u
5289 Converts the value pointed to by offsetp from a count of bytes from the
5290 start of the string, to a count of the equivalent number of UTF8 chars.
5291 Handles magic and type coercion.
5297 Perl_sv_pos_b2u(pTHX_ register SV *sv, I32* offsetp)
5306 s = (U8*)SvPV(sv, len);
5307 if ((I32)len < *offsetp)
5308 Perl_croak(aTHX_ "panic: sv_pos_b2u: bad byte offset");
5309 send = s + *offsetp;
5313 /* Call utf8n_to_uvchr() to validate the sequence */
5314 utf8n_to_uvchr(s, UTF8SKIP(s), &n, 0);
5329 Returns a boolean indicating whether the strings in the two SVs are
5330 identical. Is UTF-8 and 'use bytes' aware, handles get magic, and will
5331 coerce its args to strings if necessary.
5337 Perl_sv_eq(pTHX_ register SV *sv1, register SV *sv2)
5345 SV* svrecode = Nullsv;
5352 pv1 = SvPV(sv1, cur1);
5359 pv2 = SvPV(sv2, cur2);
5361 if (cur1 && cur2 && SvUTF8(sv1) != SvUTF8(sv2) && !IN_BYTES) {
5362 /* Differing utf8ness.
5363 * Do not UTF8size the comparands as a side-effect. */
5366 svrecode = newSVpvn(pv2, cur2);
5367 sv_recode_to_utf8(svrecode, PL_encoding);
5368 pv2 = SvPV(svrecode, cur2);
5371 svrecode = newSVpvn(pv1, cur1);
5372 sv_recode_to_utf8(svrecode, PL_encoding);
5373 pv1 = SvPV(svrecode, cur1);
5375 /* Now both are in UTF-8. */
5380 bool is_utf8 = TRUE;
5383 /* sv1 is the UTF-8 one,
5384 * if is equal it must be downgrade-able */
5385 char *pv = (char*)bytes_from_utf8((U8*)pv1,
5391 /* sv2 is the UTF-8 one,
5392 * if is equal it must be downgrade-able */
5393 char *pv = (char *)bytes_from_utf8((U8*)pv2,
5399 /* Downgrade not possible - cannot be eq */
5406 eq = memEQ(pv1, pv2, cur1);
5409 SvREFCNT_dec(svrecode);
5420 Compares the strings in two SVs. Returns -1, 0, or 1 indicating whether the
5421 string in C<sv1> is less than, equal to, or greater than the string in
5422 C<sv2>. Is UTF-8 and 'use bytes' aware, handles get magic, and will
5423 coerce its args to strings if necessary. See also C<sv_cmp_locale>.
5429 Perl_sv_cmp(pTHX_ register SV *sv1, register SV *sv2)
5432 char *pv1, *pv2, *tpv = Nullch;
5434 SV *svrecode = Nullsv;
5441 pv1 = SvPV(sv1, cur1);
5448 pv2 = SvPV(sv2, cur2);
5450 if (cur1 && cur2 && SvUTF8(sv1) != SvUTF8(sv2) && !IN_BYTES) {
5451 /* Differing utf8ness.
5452 * Do not UTF8size the comparands as a side-effect. */
5455 svrecode = newSVpvn(pv2, cur2);
5456 sv_recode_to_utf8(svrecode, PL_encoding);
5457 pv2 = SvPV(svrecode, cur2);
5460 pv2 = tpv = (char*)bytes_to_utf8((U8*)pv2, &cur2);
5465 svrecode = newSVpvn(pv1, cur1);
5466 sv_recode_to_utf8(svrecode, PL_encoding);
5467 pv1 = SvPV(svrecode, cur1);
5470 pv1 = tpv = (char*)bytes_to_utf8((U8*)pv1, &cur1);
5476 cmp = cur2 ? -1 : 0;
5480 I32 retval = memcmp((void*)pv1, (void*)pv2, cur1 < cur2 ? cur1 : cur2);
5483 cmp = retval < 0 ? -1 : 1;
5484 } else if (cur1 == cur2) {
5487 cmp = cur1 < cur2 ? -1 : 1;
5492 SvREFCNT_dec(svrecode);
5501 =for apidoc sv_cmp_locale
5503 Compares the strings in two SVs in a locale-aware manner. Is UTF-8 and
5504 'use bytes' aware, handles get magic, and will coerce its args to strings
5505 if necessary. See also C<sv_cmp_locale>. See also C<sv_cmp>.
5511 Perl_sv_cmp_locale(pTHX_ register SV *sv1, register SV *sv2)
5513 #ifdef USE_LOCALE_COLLATE
5519 if (PL_collation_standard)
5523 pv1 = sv1 ? sv_collxfrm(sv1, &len1) : (char *) NULL;
5525 pv2 = sv2 ? sv_collxfrm(sv2, &len2) : (char *) NULL;
5527 if (!pv1 || !len1) {
5538 retval = memcmp((void*)pv1, (void*)pv2, len1 < len2 ? len1 : len2);
5541 return retval < 0 ? -1 : 1;
5544 * When the result of collation is equality, that doesn't mean
5545 * that there are no differences -- some locales exclude some
5546 * characters from consideration. So to avoid false equalities,
5547 * we use the raw string as a tiebreaker.
5553 #endif /* USE_LOCALE_COLLATE */
5555 return sv_cmp(sv1, sv2);
5559 #ifdef USE_LOCALE_COLLATE
5562 =for apidoc sv_collxfrm
5564 Add Collate Transform magic to an SV if it doesn't already have it.
5566 Any scalar variable may carry PERL_MAGIC_collxfrm magic that contains the
5567 scalar data of the variable, but transformed to such a format that a normal
5568 memory comparison can be used to compare the data according to the locale
5575 Perl_sv_collxfrm(pTHX_ SV *sv, STRLEN *nxp)
5579 mg = SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_collxfrm) : (MAGIC *) NULL;
5580 if (!mg || !mg->mg_ptr || *(U32*)mg->mg_ptr != PL_collation_ix) {
5585 Safefree(mg->mg_ptr);
5587 if ((xf = mem_collxfrm(s, len, &xlen))) {
5588 if (SvREADONLY(sv)) {
5591 return xf + sizeof(PL_collation_ix);
5594 sv_magic(sv, 0, PERL_MAGIC_collxfrm, 0, 0);
5595 mg = mg_find(sv, PERL_MAGIC_collxfrm);
5608 if (mg && mg->mg_ptr) {
5610 return mg->mg_ptr + sizeof(PL_collation_ix);
5618 #endif /* USE_LOCALE_COLLATE */
5623 Get a line from the filehandle and store it into the SV, optionally
5624 appending to the currently-stored string.
5630 Perl_sv_gets(pTHX_ register SV *sv, register PerlIO *fp, I32 append)
5634 register STDCHAR rslast;
5635 register STDCHAR *bp;
5640 SV_CHECK_THINKFIRST(sv);
5641 (void)SvUPGRADE(sv, SVt_PV);
5645 if (PL_curcop == &PL_compiling) {
5646 /* we always read code in line mode */
5650 else if (RsSNARF(PL_rs)) {
5654 else if (RsRECORD(PL_rs)) {
5655 I32 recsize, bytesread;
5658 /* Grab the size of the record we're getting */
5659 recsize = SvIV(SvRV(PL_rs));
5660 (void)SvPOK_only(sv); /* Validate pointer */
5661 buffer = SvGROW(sv, (STRLEN)(recsize + 1));
5664 /* VMS wants read instead of fread, because fread doesn't respect */
5665 /* RMS record boundaries. This is not necessarily a good thing to be */
5666 /* doing, but we've got no other real choice */
5667 bytesread = PerlLIO_read(PerlIO_fileno(fp), buffer, recsize);
5669 bytesread = PerlIO_read(fp, buffer, recsize);
5671 SvCUR_set(sv, bytesread);
5672 buffer[bytesread] = '\0';
5673 if (PerlIO_isutf8(fp))
5677 return(SvCUR(sv) ? SvPVX(sv) : Nullch);
5679 else if (RsPARA(PL_rs)) {
5685 /* Get $/ i.e. PL_rs into same encoding as stream wants */
5686 if (PerlIO_isutf8(fp)) {
5687 rsptr = SvPVutf8(PL_rs, rslen);
5690 if (SvUTF8(PL_rs)) {
5691 if (!sv_utf8_downgrade(PL_rs, TRUE)) {
5692 Perl_croak(aTHX_ "Wide character in $/");
5695 rsptr = SvPV(PL_rs, rslen);
5699 rslast = rslen ? rsptr[rslen - 1] : '\0';
5701 if (rspara) { /* have to do this both before and after */
5702 do { /* to make sure file boundaries work right */
5705 i = PerlIO_getc(fp);
5709 PerlIO_ungetc(fp,i);
5715 /* See if we know enough about I/O mechanism to cheat it ! */
5717 /* This used to be #ifdef test - it is made run-time test for ease
5718 of abstracting out stdio interface. One call should be cheap
5719 enough here - and may even be a macro allowing compile
5723 if (PerlIO_fast_gets(fp)) {
5726 * We're going to steal some values from the stdio struct
5727 * and put EVERYTHING in the innermost loop into registers.
5729 register STDCHAR *ptr;
5733 #if defined(VMS) && defined(PERLIO_IS_STDIO)
5734 /* An ungetc()d char is handled separately from the regular
5735 * buffer, so we getc() it back out and stuff it in the buffer.
5737 i = PerlIO_getc(fp);
5738 if (i == EOF) return 0;
5739 *(--((*fp)->_ptr)) = (unsigned char) i;
5743 /* Here is some breathtakingly efficient cheating */
5745 cnt = PerlIO_get_cnt(fp); /* get count into register */
5746 (void)SvPOK_only(sv); /* validate pointer */
5747 if ((I32)(SvLEN(sv) - append) <= cnt + 1) { /* make sure we have the room */
5748 if (cnt > 80 && (I32)SvLEN(sv) > append) {
5749 shortbuffered = cnt - SvLEN(sv) + append + 1;
5750 cnt -= shortbuffered;
5754 /* remember that cnt can be negative */
5755 SvGROW(sv, (STRLEN)(append + (cnt <= 0 ? 2 : (cnt + 1))));
5760 bp = (STDCHAR*)SvPVX(sv) + append; /* move these two too to registers */
5761 ptr = (STDCHAR*)PerlIO_get_ptr(fp);
5762 DEBUG_P(PerlIO_printf(Perl_debug_log,
5763 "Screamer: entering, ptr=%"UVuf", cnt=%ld\n",PTR2UV(ptr),(long)cnt));
5764 DEBUG_P(PerlIO_printf(Perl_debug_log,
5765 "Screamer: entering: PerlIO * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
5766 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
5767 PTR2UV(PerlIO_has_base(fp) ? PerlIO_get_base(fp) : 0)));
5772 while (cnt > 0) { /* this | eat */
5774 if ((*bp++ = *ptr++) == rslast) /* really | dust */
5775 goto thats_all_folks; /* screams | sed :-) */
5779 Copy(ptr, bp, cnt, char); /* this | eat */
5780 bp += cnt; /* screams | dust */
5781 ptr += cnt; /* louder | sed :-) */
5786 if (shortbuffered) { /* oh well, must extend */
5787 cnt = shortbuffered;
5789 bpx = bp - (STDCHAR*)SvPVX(sv); /* box up before relocation */
5791 SvGROW(sv, SvLEN(sv) + append + cnt + 2);
5792 bp = (STDCHAR*)SvPVX(sv) + bpx; /* unbox after relocation */
5796 DEBUG_P(PerlIO_printf(Perl_debug_log,
5797 "Screamer: going to getc, ptr=%"UVuf", cnt=%ld\n",
5798 PTR2UV(ptr),(long)cnt));
5799 PerlIO_set_ptrcnt(fp, (STDCHAR*)ptr, cnt); /* deregisterize cnt and ptr */
5801 DEBUG_P(PerlIO_printf(Perl_debug_log,
5802 "Screamer: pre: FILE * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
5803 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
5804 PTR2UV(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0)));
5806 /* This used to call 'filbuf' in stdio form, but as that behaves like
5807 getc when cnt <= 0 we use PerlIO_getc here to avoid introducing
5808 another abstraction. */
5809 i = PerlIO_getc(fp); /* get more characters */
5811 DEBUG_P(PerlIO_printf(Perl_debug_log,
5812 "Screamer: post: FILE * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
5813 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
5814 PTR2UV(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0)));
5816 cnt = PerlIO_get_cnt(fp);
5817 ptr = (STDCHAR*)PerlIO_get_ptr(fp); /* reregisterize cnt and ptr */
5818 DEBUG_P(PerlIO_printf(Perl_debug_log,
5819 "Screamer: after getc, ptr=%"UVuf", cnt=%ld\n",PTR2UV(ptr),(long)cnt));
5821 if (i == EOF) /* all done for ever? */
5822 goto thats_really_all_folks;
5824 bpx = bp - (STDCHAR*)SvPVX(sv); /* box up before relocation */
5826 SvGROW(sv, bpx + cnt + 2);
5827 bp = (STDCHAR*)SvPVX(sv) + bpx; /* unbox after relocation */
5829 *bp++ = (STDCHAR)i; /* store character from PerlIO_getc */
5831 if (rslen && (STDCHAR)i == rslast) /* all done for now? */
5832 goto thats_all_folks;
5836 if ((rslen > 1 && (STRLEN)(bp - (STDCHAR*)SvPVX(sv)) < rslen) ||
5837 memNE((char*)bp - rslen, rsptr, rslen))
5838 goto screamer; /* go back to the fray */
5839 thats_really_all_folks:
5841 cnt += shortbuffered;
5842 DEBUG_P(PerlIO_printf(Perl_debug_log,
5843 "Screamer: quitting, ptr=%"UVuf", cnt=%ld\n",PTR2UV(ptr),(long)cnt));
5844 PerlIO_set_ptrcnt(fp, (STDCHAR*)ptr, cnt); /* put these back or we're in trouble */
5845 DEBUG_P(PerlIO_printf(Perl_debug_log,
5846 "Screamer: end: FILE * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
5847 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
5848 PTR2UV(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0)));
5850 SvCUR_set(sv, bp - (STDCHAR*)SvPVX(sv)); /* set length */
5851 DEBUG_P(PerlIO_printf(Perl_debug_log,
5852 "Screamer: done, len=%ld, string=|%.*s|\n",
5853 (long)SvCUR(sv),(int)SvCUR(sv),SvPVX(sv)));
5858 /*The big, slow, and stupid way */
5861 /* Need to work around EPOC SDK features */
5862 /* On WINS: MS VC5 generates calls to _chkstk, */
5863 /* if a `large' stack frame is allocated */
5864 /* gcc on MARM does not generate calls like these */
5870 register STDCHAR *bpe = buf + sizeof(buf);
5872 while ((i = PerlIO_getc(fp)) != EOF && (*bp++ = (STDCHAR)i) != rslast && bp < bpe)
5873 ; /* keep reading */
5877 cnt = PerlIO_read(fp,(char*)buf, sizeof(buf));
5878 /* Accomodate broken VAXC compiler, which applies U8 cast to
5879 * both args of ?: operator, causing EOF to change into 255
5881 if (cnt) { i = (U8)buf[cnt - 1]; } else { i = EOF; }
5885 sv_catpvn(sv, (char *) buf, cnt);
5887 sv_setpvn(sv, (char *) buf, cnt);
5889 if (i != EOF && /* joy */
5891 SvCUR(sv) < rslen ||
5892 memNE(SvPVX(sv) + SvCUR(sv) - rslen, rsptr, rslen)))
5896 * If we're reading from a TTY and we get a short read,
5897 * indicating that the user hit his EOF character, we need
5898 * to notice it now, because if we try to read from the TTY
5899 * again, the EOF condition will disappear.
5901 * The comparison of cnt to sizeof(buf) is an optimization
5902 * that prevents unnecessary calls to feof().
5906 if (!(cnt < sizeof(buf) && PerlIO_eof(fp)))
5911 if (rspara) { /* have to do this both before and after */
5912 while (i != EOF) { /* to make sure file boundaries work right */
5913 i = PerlIO_getc(fp);
5915 PerlIO_ungetc(fp,i);
5921 if (PerlIO_isutf8(fp))
5926 return (SvCUR(sv) - append) ? SvPVX(sv) : Nullch;
5932 Auto-increment of the value in the SV, doing string to numeric conversion
5933 if necessary. Handles 'get' magic.
5939 Perl_sv_inc(pTHX_ register SV *sv)
5948 if (SvTHINKFIRST(sv)) {
5949 if (SvREADONLY(sv) && SvFAKE(sv))
5950 sv_force_normal(sv);
5951 if (SvREADONLY(sv)) {
5952 if (PL_curcop != &PL_compiling)
5953 Perl_croak(aTHX_ PL_no_modify);
5957 if (SvAMAGIC(sv) && AMG_CALLun(sv,inc))
5959 i = PTR2IV(SvRV(sv));
5964 flags = SvFLAGS(sv);
5965 if ((flags & (SVp_NOK|SVp_IOK)) == SVp_NOK) {
5966 /* It's (privately or publicly) a float, but not tested as an
5967 integer, so test it to see. */
5969 flags = SvFLAGS(sv);
5971 if ((flags & SVf_IOK) || ((flags & (SVp_IOK | SVp_NOK)) == SVp_IOK)) {
5972 /* It's publicly an integer, or privately an integer-not-float */
5973 #ifdef PERL_PRESERVE_IVUV
5977 if (SvUVX(sv) == UV_MAX)
5978 sv_setnv(sv, UV_MAX_P1);
5980 (void)SvIOK_only_UV(sv);
5983 if (SvIVX(sv) == IV_MAX)
5984 sv_setuv(sv, (UV)IV_MAX + 1);
5986 (void)SvIOK_only(sv);
5992 if (flags & SVp_NOK) {
5993 (void)SvNOK_only(sv);
5998 if (!(flags & SVp_POK) || !*SvPVX(sv)) {
5999 if ((flags & SVTYPEMASK) < SVt_PVIV)
6000 sv_upgrade(sv, SVt_IV);
6001 (void)SvIOK_only(sv);
6006 while (isALPHA(*d)) d++;
6007 while (isDIGIT(*d)) d++;
6009 #ifdef PERL_PRESERVE_IVUV
6010 /* Got to punt this as an integer if needs be, but we don't issue
6011 warnings. Probably ought to make the sv_iv_please() that does
6012 the conversion if possible, and silently. */
6013 int numtype = grok_number(SvPVX(sv), SvCUR(sv), NULL);
6014 if (numtype && !(numtype & IS_NUMBER_INFINITY)) {
6015 /* Need to try really hard to see if it's an integer.
6016 9.22337203685478e+18 is an integer.
6017 but "9.22337203685478e+18" + 0 is UV=9223372036854779904
6018 so $a="9.22337203685478e+18"; $a+0; $a++
6019 needs to be the same as $a="9.22337203685478e+18"; $a++
6026 /* sv_2iv *should* have made this an NV */
6027 if (flags & SVp_NOK) {
6028 (void)SvNOK_only(sv);
6032 /* I don't think we can get here. Maybe I should assert this
6033 And if we do get here I suspect that sv_setnv will croak. NWC
6035 #if defined(USE_LONG_DOUBLE)
6036 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",
6037 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
6039 DEBUG_c(PerlIO_printf(Perl_debug_log,"sv_inc punt failed to convert '%s' to IOK or NOKp, UV=0x%"UVxf" NV=%"NVgf"\n",
6040 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
6043 #endif /* PERL_PRESERVE_IVUV */
6044 sv_setnv(sv,Atof(SvPVX(sv)) + 1.0);
6048 while (d >= SvPVX(sv)) {
6056 /* MKS: The original code here died if letters weren't consecutive.
6057 * at least it didn't have to worry about non-C locales. The
6058 * new code assumes that ('z'-'a')==('Z'-'A'), letters are
6059 * arranged in order (although not consecutively) and that only
6060 * [A-Za-z] are accepted by isALPHA in the C locale.
6062 if (*d != 'z' && *d != 'Z') {
6063 do { ++*d; } while (!isALPHA(*d));
6066 *(d--) -= 'z' - 'a';
6071 *(d--) -= 'z' - 'a' + 1;
6075 /* oh,oh, the number grew */
6076 SvGROW(sv, SvCUR(sv) + 2);
6078 for (d = SvPVX(sv) + SvCUR(sv); d > SvPVX(sv); d--)
6089 Auto-decrement of the value in the SV, doing string to numeric conversion
6090 if necessary. Handles 'get' magic.
6096 Perl_sv_dec(pTHX_ register SV *sv)
6104 if (SvTHINKFIRST(sv)) {
6105 if (SvREADONLY(sv) && SvFAKE(sv))
6106 sv_force_normal(sv);
6107 if (SvREADONLY(sv)) {
6108 if (PL_curcop != &PL_compiling)
6109 Perl_croak(aTHX_ PL_no_modify);
6113 if (SvAMAGIC(sv) && AMG_CALLun(sv,dec))
6115 i = PTR2IV(SvRV(sv));
6120 /* Unlike sv_inc we don't have to worry about string-never-numbers
6121 and keeping them magic. But we mustn't warn on punting */
6122 flags = SvFLAGS(sv);
6123 if ((flags & SVf_IOK) || ((flags & (SVp_IOK | SVp_NOK)) == SVp_IOK)) {
6124 /* It's publicly an integer, or privately an integer-not-float */
6125 #ifdef PERL_PRESERVE_IVUV
6129 if (SvUVX(sv) == 0) {
6130 (void)SvIOK_only(sv);
6134 (void)SvIOK_only_UV(sv);
6138 if (SvIVX(sv) == IV_MIN)
6139 sv_setnv(sv, (NV)IV_MIN - 1.0);
6141 (void)SvIOK_only(sv);
6147 if (flags & SVp_NOK) {
6149 (void)SvNOK_only(sv);
6152 if (!(flags & SVp_POK)) {
6153 if ((flags & SVTYPEMASK) < SVt_PVNV)
6154 sv_upgrade(sv, SVt_NV);
6156 (void)SvNOK_only(sv);
6159 #ifdef PERL_PRESERVE_IVUV
6161 int numtype = grok_number(SvPVX(sv), SvCUR(sv), NULL);
6162 if (numtype && !(numtype & IS_NUMBER_INFINITY)) {
6163 /* Need to try really hard to see if it's an integer.
6164 9.22337203685478e+18 is an integer.
6165 but "9.22337203685478e+18" + 0 is UV=9223372036854779904
6166 so $a="9.22337203685478e+18"; $a+0; $a--
6167 needs to be the same as $a="9.22337203685478e+18"; $a--
6174 /* sv_2iv *should* have made this an NV */
6175 if (flags & SVp_NOK) {
6176 (void)SvNOK_only(sv);
6180 /* I don't think we can get here. Maybe I should assert this
6181 And if we do get here I suspect that sv_setnv will croak. NWC
6183 #if defined(USE_LONG_DOUBLE)
6184 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",
6185 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
6187 DEBUG_c(PerlIO_printf(Perl_debug_log,"sv_dec punt failed to convert '%s' to IOK or NOKp, UV=0x%"UVxf" NV=%"NVgf"\n",
6188 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
6192 #endif /* PERL_PRESERVE_IVUV */
6193 sv_setnv(sv,Atof(SvPVX(sv)) - 1.0); /* punt */
6197 =for apidoc sv_mortalcopy
6199 Creates a new SV which is a copy of the original SV (using C<sv_setsv>).
6200 The new SV is marked as mortal. It will be destroyed "soon", either by an
6201 explicit call to FREETMPS, or by an implicit call at places such as
6202 statement boundaries. See also C<sv_newmortal> and C<sv_2mortal>.
6207 /* Make a string that will exist for the duration of the expression
6208 * evaluation. Actually, it may have to last longer than that, but
6209 * hopefully we won't free it until it has been assigned to a
6210 * permanent location. */
6213 Perl_sv_mortalcopy(pTHX_ SV *oldstr)
6218 sv_setsv(sv,oldstr);
6220 PL_tmps_stack[++PL_tmps_ix] = sv;
6226 =for apidoc sv_newmortal
6228 Creates a new null SV which is mortal. The reference count of the SV is
6229 set to 1. It will be destroyed "soon", either by an explicit call to
6230 FREETMPS, or by an implicit call at places such as statement boundaries.
6231 See also C<sv_mortalcopy> and C<sv_2mortal>.
6237 Perl_sv_newmortal(pTHX)
6242 SvFLAGS(sv) = SVs_TEMP;
6244 PL_tmps_stack[++PL_tmps_ix] = sv;
6249 =for apidoc sv_2mortal
6251 Marks an existing SV as mortal. The SV will be destroyed "soon", either
6252 by an explicit call to FREETMPS, or by an implicit call at places such as
6253 statement boundaries. See also C<sv_newmortal> and C<sv_mortalcopy>.
6259 Perl_sv_2mortal(pTHX_ register SV *sv)
6263 if (SvREADONLY(sv) && SvIMMORTAL(sv))
6266 PL_tmps_stack[++PL_tmps_ix] = sv;
6274 Creates a new SV and copies a string into it. The reference count for the
6275 SV is set to 1. If C<len> is zero, Perl will compute the length using
6276 strlen(). For efficiency, consider using C<newSVpvn> instead.
6282 Perl_newSVpv(pTHX_ const char *s, STRLEN len)
6289 sv_setpvn(sv,s,len);
6294 =for apidoc newSVpvn
6296 Creates a new SV and copies a string into it. The reference count for the
6297 SV is set to 1. Note that if C<len> is zero, Perl will create a zero length
6298 string. You are responsible for ensuring that the source string is at least
6305 Perl_newSVpvn(pTHX_ const char *s, STRLEN len)
6310 sv_setpvn(sv,s,len);
6315 =for apidoc newSVpvn_share
6317 Creates a new SV with its SvPVX pointing to a shared string in the string
6318 table. If the string does not already exist in the table, it is created
6319 first. Turns on READONLY and FAKE. The string's hash is stored in the UV
6320 slot of the SV; if the C<hash> parameter is non-zero, that value is used;
6321 otherwise the hash is computed. The idea here is that as the string table
6322 is used for shared hash keys these strings will have SvPVX == HeKEY and
6323 hash lookup will avoid string compare.
6329 Perl_newSVpvn_share(pTHX_ const char *src, I32 len, U32 hash)
6332 bool is_utf8 = FALSE;
6334 STRLEN tmplen = -len;
6336 /* See the note in hv.c:hv_fetch() --jhi */
6337 src = (char*)bytes_from_utf8((U8*)src, &tmplen, &is_utf8);
6341 PERL_HASH(hash, src, len);
6343 sv_upgrade(sv, SVt_PVIV);
6344 SvPVX(sv) = sharepvn(src, is_utf8?-len:len, hash);
6357 #if defined(PERL_IMPLICIT_CONTEXT)
6359 /* pTHX_ magic can't cope with varargs, so this is a no-context
6360 * version of the main function, (which may itself be aliased to us).
6361 * Don't access this version directly.
6365 Perl_newSVpvf_nocontext(const char* pat, ...)
6370 va_start(args, pat);
6371 sv = vnewSVpvf(pat, &args);
6378 =for apidoc newSVpvf
6380 Creates a new SV and initializes it with the string formatted like
6387 Perl_newSVpvf(pTHX_ const char* pat, ...)
6391 va_start(args, pat);
6392 sv = vnewSVpvf(pat, &args);
6397 /* backend for newSVpvf() and newSVpvf_nocontext() */
6400 Perl_vnewSVpvf(pTHX_ const char* pat, va_list* args)
6404 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
6411 Creates a new SV and copies a floating point value into it.
6412 The reference count for the SV is set to 1.
6418 Perl_newSVnv(pTHX_ NV n)
6430 Creates a new SV and copies an integer into it. The reference count for the
6437 Perl_newSViv(pTHX_ IV i)
6449 Creates a new SV and copies an unsigned integer into it.
6450 The reference count for the SV is set to 1.
6456 Perl_newSVuv(pTHX_ UV u)
6466 =for apidoc newRV_noinc
6468 Creates an RV wrapper for an SV. The reference count for the original
6469 SV is B<not> incremented.
6475 Perl_newRV_noinc(pTHX_ SV *tmpRef)
6480 sv_upgrade(sv, SVt_RV);
6487 /* newRV_inc is the official function name to use now.
6488 * newRV_inc is in fact #defined to newRV in sv.h
6492 Perl_newRV(pTHX_ SV *tmpRef)
6494 return newRV_noinc(SvREFCNT_inc(tmpRef));
6500 Creates a new SV which is an exact duplicate of the original SV.
6507 Perl_newSVsv(pTHX_ register SV *old)
6513 if (SvTYPE(old) == SVTYPEMASK) {
6514 if (ckWARN_d(WARN_INTERNAL))
6515 Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "semi-panic: attempt to dup freed string");
6530 =for apidoc sv_reset
6532 Underlying implementation for the C<reset> Perl function.
6533 Note that the perl-level function is vaguely deprecated.
6539 Perl_sv_reset(pTHX_ register char *s, HV *stash)
6547 char todo[PERL_UCHAR_MAX+1];
6552 if (!*s) { /* reset ?? searches */
6553 for (pm = HvPMROOT(stash); pm; pm = pm->op_pmnext) {
6554 pm->op_pmdynflags &= ~PMdf_USED;
6559 /* reset variables */
6561 if (!HvARRAY(stash))
6564 Zero(todo, 256, char);
6566 i = (unsigned char)*s;
6570 max = (unsigned char)*s++;
6571 for ( ; i <= max; i++) {
6574 for (i = 0; i <= (I32) HvMAX(stash); i++) {
6575 for (entry = HvARRAY(stash)[i];
6577 entry = HeNEXT(entry))
6579 if (!todo[(U8)*HeKEY(entry)])
6581 gv = (GV*)HeVAL(entry);
6583 if (SvTHINKFIRST(sv)) {
6584 if (!SvREADONLY(sv) && SvROK(sv))
6589 if (SvTYPE(sv) >= SVt_PV) {
6591 if (SvPVX(sv) != Nullch)
6598 if (GvHV(gv) && !HvNAME(GvHV(gv))) {
6600 #ifdef USE_ENVIRON_ARRAY
6602 # ifdef USE_ITHREADS
6603 && PL_curinterp == aTHX
6607 environ[0] = Nullch;
6619 Using various gambits, try to get an IO from an SV: the IO slot if its a
6620 GV; or the recursive result if we're an RV; or the IO slot of the symbol
6621 named after the PV if we're a string.
6627 Perl_sv_2io(pTHX_ SV *sv)
6633 switch (SvTYPE(sv)) {
6641 Perl_croak(aTHX_ "Bad filehandle: %s", GvNAME(gv));
6645 Perl_croak(aTHX_ PL_no_usym, "filehandle");
6647 return sv_2io(SvRV(sv));
6648 gv = gv_fetchpv(SvPV(sv,n_a), FALSE, SVt_PVIO);
6654 Perl_croak(aTHX_ "Bad filehandle: %s", SvPV(sv,n_a));
6663 Using various gambits, try to get a CV from an SV; in addition, try if
6664 possible to set C<*st> and C<*gvp> to the stash and GV associated with it.
6670 Perl_sv_2cv(pTHX_ SV *sv, HV **st, GV **gvp, I32 lref)
6677 return *gvp = Nullgv, Nullcv;
6678 switch (SvTYPE(sv)) {
6697 SV **sp = &sv; /* Used in tryAMAGICunDEREF macro. */
6698 tryAMAGICunDEREF(to_cv);
6701 if (SvTYPE(sv) == SVt_PVCV) {
6710 Perl_croak(aTHX_ "Not a subroutine reference");
6715 gv = gv_fetchpv(SvPV(sv, n_a), lref, SVt_PVCV);
6721 if (lref && !GvCVu(gv)) {
6724 tmpsv = NEWSV(704,0);
6725 gv_efullname3(tmpsv, gv, Nullch);
6726 /* XXX this is probably not what they think they're getting.
6727 * It has the same effect as "sub name;", i.e. just a forward
6729 newSUB(start_subparse(FALSE, 0),
6730 newSVOP(OP_CONST, 0, tmpsv),
6735 Perl_croak(aTHX_ "Unable to create sub named \"%s\"", SvPV(sv,n_a));
6744 Returns true if the SV has a true value by Perl's rules.
6745 Use the C<SvTRUE> macro instead, which may call C<sv_true()> or may
6746 instead use an in-line version.
6752 Perl_sv_true(pTHX_ register SV *sv)
6758 if ((tXpv = (XPV*)SvANY(sv)) &&
6759 (tXpv->xpv_cur > 1 ||
6760 (tXpv->xpv_cur && *tXpv->xpv_pv != '0')))
6767 return SvIVX(sv) != 0;
6770 return SvNVX(sv) != 0.0;
6772 return sv_2bool(sv);
6780 A private implementation of the C<SvIVx> macro for compilers which can't
6781 cope with complex macro expressions. Always use the macro instead.
6787 Perl_sv_iv(pTHX_ register SV *sv)
6791 return (IV)SvUVX(sv);
6800 A private implementation of the C<SvUVx> macro for compilers which can't
6801 cope with complex macro expressions. Always use the macro instead.
6807 Perl_sv_uv(pTHX_ register SV *sv)
6812 return (UV)SvIVX(sv);
6820 A private implementation of the C<SvNVx> macro for compilers which can't
6821 cope with complex macro expressions. Always use the macro instead.
6827 Perl_sv_nv(pTHX_ register SV *sv)
6837 Use the C<SvPV_nolen> macro instead
6841 A private implementation of the C<SvPV> macro for compilers which can't
6842 cope with complex macro expressions. Always use the macro instead.
6848 Perl_sv_pvn(pTHX_ SV *sv, STRLEN *lp)
6854 return sv_2pv(sv, lp);
6859 Perl_sv_pvn_nomg(pTHX_ register SV *sv, STRLEN *lp)
6865 return sv_2pv_flags(sv, lp, 0);
6869 =for apidoc sv_pvn_force
6871 Get a sensible string out of the SV somehow.
6872 A private implementation of the C<SvPV_force> macro for compilers which
6873 can't cope with complex macro expressions. Always use the macro instead.
6875 =for apidoc sv_pvn_force_flags
6877 Get a sensible string out of the SV somehow.
6878 If C<flags> has C<SV_GMAGIC> bit set, will C<mg_get> on C<sv> if
6879 appropriate, else not. C<sv_pvn_force> and C<sv_pvn_force_nomg> are
6880 implemented in terms of this function.
6881 You normally want to use the various wrapper macros instead: see
6882 C<SvPV_force> and C<SvPV_force_nomg>
6888 Perl_sv_pvn_force_flags(pTHX_ SV *sv, STRLEN *lp, I32 flags)
6892 if (SvTHINKFIRST(sv) && !SvROK(sv))
6893 sv_force_normal(sv);
6899 if (SvTYPE(sv) > SVt_PVLV && SvTYPE(sv) != SVt_PVFM) {
6900 Perl_croak(aTHX_ "Can't coerce %s to string in %s", sv_reftype(sv,0),
6904 s = sv_2pv_flags(sv, lp, flags);
6905 if (s != SvPVX(sv)) { /* Almost, but not quite, sv_setpvn() */
6910 (void)SvUPGRADE(sv, SVt_PV); /* Never FALSE */
6911 SvGROW(sv, len + 1);
6912 Move(s,SvPVX(sv),len,char);
6917 SvPOK_on(sv); /* validate pointer */
6919 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2pv(%s)\n",
6920 PTR2UV(sv),SvPVX(sv)));
6927 =for apidoc sv_pvbyte
6929 Use C<SvPVbyte_nolen> instead.
6931 =for apidoc sv_pvbyten
6933 A private implementation of the C<SvPVbyte> macro for compilers
6934 which can't cope with complex macro expressions. Always use the macro
6941 Perl_sv_pvbyten(pTHX_ SV *sv, STRLEN *lp)
6943 sv_utf8_downgrade(sv,0);
6944 return sv_pvn(sv,lp);
6948 =for apidoc sv_pvbyten_force
6950 A private implementation of the C<SvPVbytex_force> macro for compilers
6951 which can't cope with complex macro expressions. Always use the macro
6958 Perl_sv_pvbyten_force(pTHX_ SV *sv, STRLEN *lp)
6960 sv_utf8_downgrade(sv,0);
6961 return sv_pvn_force(sv,lp);
6965 =for apidoc sv_pvutf8
6967 Use the C<SvPVutf8_nolen> macro instead
6969 =for apidoc sv_pvutf8n
6971 A private implementation of the C<SvPVutf8> macro for compilers
6972 which can't cope with complex macro expressions. Always use the macro
6979 Perl_sv_pvutf8n(pTHX_ SV *sv, STRLEN *lp)
6981 sv_utf8_upgrade(sv);
6982 return sv_pvn(sv,lp);
6986 =for apidoc sv_pvutf8n_force
6988 A private implementation of the C<SvPVutf8_force> macro for compilers
6989 which can't cope with complex macro expressions. Always use the macro
6996 Perl_sv_pvutf8n_force(pTHX_ SV *sv, STRLEN *lp)
6998 sv_utf8_upgrade(sv);
6999 return sv_pvn_force(sv,lp);
7003 =for apidoc sv_reftype
7005 Returns a string describing what the SV is a reference to.
7011 Perl_sv_reftype(pTHX_ SV *sv, int ob)
7013 if (ob && SvOBJECT(sv)) {
7014 HV *svs = SvSTASH(sv);
7015 /* [20011101.072] This bandaid for C<package;> should eventually
7016 be removed. AMS 20011103 */
7017 return (svs ? HvNAME(svs) : "<none>");
7020 switch (SvTYPE(sv)) {
7034 case SVt_PVLV: return "LVALUE";
7035 case SVt_PVAV: return "ARRAY";
7036 case SVt_PVHV: return "HASH";
7037 case SVt_PVCV: return "CODE";
7038 case SVt_PVGV: return "GLOB";
7039 case SVt_PVFM: return "FORMAT";
7040 case SVt_PVIO: return "IO";
7041 default: return "UNKNOWN";
7047 =for apidoc sv_isobject
7049 Returns a boolean indicating whether the SV is an RV pointing to a blessed
7050 object. If the SV is not an RV, or if the object is not blessed, then this
7057 Perl_sv_isobject(pTHX_ SV *sv)
7074 Returns a boolean indicating whether the SV is blessed into the specified
7075 class. This does not check for subtypes; use C<sv_derived_from> to verify
7076 an inheritance relationship.
7082 Perl_sv_isa(pTHX_ SV *sv, const char *name)
7094 return strEQ(HvNAME(SvSTASH(sv)), name);
7100 Creates a new SV for the RV, C<rv>, to point to. If C<rv> is not an RV then
7101 it will be upgraded to one. If C<classname> is non-null then the new SV will
7102 be blessed in the specified package. The new SV is returned and its
7103 reference count is 1.
7109 Perl_newSVrv(pTHX_ SV *rv, const char *classname)
7115 SV_CHECK_THINKFIRST(rv);
7118 if (SvTYPE(rv) >= SVt_PVMG) {
7119 U32 refcnt = SvREFCNT(rv);
7123 SvREFCNT(rv) = refcnt;
7126 if (SvTYPE(rv) < SVt_RV)
7127 sv_upgrade(rv, SVt_RV);
7128 else if (SvTYPE(rv) > SVt_RV) {
7129 (void)SvOOK_off(rv);
7130 if (SvPVX(rv) && SvLEN(rv))
7131 Safefree(SvPVX(rv));
7141 HV* stash = gv_stashpv(classname, TRUE);
7142 (void)sv_bless(rv, stash);
7148 =for apidoc sv_setref_pv
7150 Copies a pointer into a new SV, optionally blessing the SV. The C<rv>
7151 argument will be upgraded to an RV. That RV will be modified to point to
7152 the new SV. If the C<pv> argument is NULL then C<PL_sv_undef> will be placed
7153 into the SV. The C<classname> argument indicates the package for the
7154 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
7155 will be returned and will have a reference count of 1.
7157 Do not use with other Perl types such as HV, AV, SV, CV, because those
7158 objects will become corrupted by the pointer copy process.
7160 Note that C<sv_setref_pvn> copies the string while this copies the pointer.
7166 Perl_sv_setref_pv(pTHX_ SV *rv, const char *classname, void *pv)
7169 sv_setsv(rv, &PL_sv_undef);
7173 sv_setiv(newSVrv(rv,classname), PTR2IV(pv));
7178 =for apidoc sv_setref_iv
7180 Copies an integer into a new SV, optionally blessing the SV. The C<rv>
7181 argument will be upgraded to an RV. That RV will be modified to point to
7182 the new SV. The C<classname> argument indicates the package for the
7183 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
7184 will be returned and will have a reference count of 1.
7190 Perl_sv_setref_iv(pTHX_ SV *rv, const char *classname, IV iv)
7192 sv_setiv(newSVrv(rv,classname), iv);
7197 =for apidoc sv_setref_uv
7199 Copies an unsigned integer into a new SV, optionally blessing the SV. The C<rv>
7200 argument will be upgraded to an RV. That RV will be modified to point to
7201 the new SV. The C<classname> argument indicates the package for the
7202 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
7203 will be returned and will have a reference count of 1.
7209 Perl_sv_setref_uv(pTHX_ SV *rv, const char *classname, UV uv)
7211 sv_setuv(newSVrv(rv,classname), uv);
7216 =for apidoc sv_setref_nv
7218 Copies a double into a new SV, optionally blessing the SV. The C<rv>
7219 argument will be upgraded to an RV. That RV will be modified to point to
7220 the new SV. The C<classname> argument indicates the package for the
7221 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
7222 will be returned and will have a reference count of 1.
7228 Perl_sv_setref_nv(pTHX_ SV *rv, const char *classname, NV nv)
7230 sv_setnv(newSVrv(rv,classname), nv);
7235 =for apidoc sv_setref_pvn
7237 Copies a string into a new SV, optionally blessing the SV. The length of the
7238 string must be specified with C<n>. The C<rv> argument will be upgraded to
7239 an RV. That RV will be modified to point to the new SV. The C<classname>
7240 argument indicates the package for the blessing. Set C<classname> to
7241 C<Nullch> to avoid the blessing. The new SV will be returned and will have
7242 a reference count of 1.
7244 Note that C<sv_setref_pv> copies the pointer while this copies the string.
7250 Perl_sv_setref_pvn(pTHX_ SV *rv, const char *classname, char *pv, STRLEN n)
7252 sv_setpvn(newSVrv(rv,classname), pv, n);
7257 =for apidoc sv_bless
7259 Blesses an SV into a specified package. The SV must be an RV. The package
7260 must be designated by its stash (see C<gv_stashpv()>). The reference count
7261 of the SV is unaffected.
7267 Perl_sv_bless(pTHX_ SV *sv, HV *stash)
7271 Perl_croak(aTHX_ "Can't bless non-reference value");
7273 if (SvFLAGS(tmpRef) & (SVs_OBJECT|SVf_READONLY)) {
7274 if (SvREADONLY(tmpRef))
7275 Perl_croak(aTHX_ PL_no_modify);
7276 if (SvOBJECT(tmpRef)) {
7277 if (SvTYPE(tmpRef) != SVt_PVIO)
7279 SvREFCNT_dec(SvSTASH(tmpRef));
7282 SvOBJECT_on(tmpRef);
7283 if (SvTYPE(tmpRef) != SVt_PVIO)
7285 (void)SvUPGRADE(tmpRef, SVt_PVMG);
7286 SvSTASH(tmpRef) = (HV*)SvREFCNT_inc(stash);
7293 if(SvSMAGICAL(tmpRef))
7294 if(mg_find(tmpRef, PERL_MAGIC_ext) || mg_find(tmpRef, PERL_MAGIC_uvar))
7302 /* Downgrades a PVGV to a PVMG.
7306 S_sv_unglob(pTHX_ SV *sv)
7310 assert(SvTYPE(sv) == SVt_PVGV);
7315 SvREFCNT_dec(GvSTASH(sv));
7316 GvSTASH(sv) = Nullhv;
7318 sv_unmagic(sv, PERL_MAGIC_glob);
7319 Safefree(GvNAME(sv));
7322 /* need to keep SvANY(sv) in the right arena */
7323 xpvmg = new_XPVMG();
7324 StructCopy(SvANY(sv), xpvmg, XPVMG);
7325 del_XPVGV(SvANY(sv));
7328 SvFLAGS(sv) &= ~SVTYPEMASK;
7329 SvFLAGS(sv) |= SVt_PVMG;
7333 =for apidoc sv_unref_flags
7335 Unsets the RV status of the SV, and decrements the reference count of
7336 whatever was being referenced by the RV. This can almost be thought of
7337 as a reversal of C<newSVrv>. The C<cflags> argument can contain
7338 C<SV_IMMEDIATE_UNREF> to force the reference count to be decremented
7339 (otherwise the decrementing is conditional on the reference count being
7340 different from one or the reference being a readonly SV).
7347 Perl_sv_unref_flags(pTHX_ SV *sv, U32 flags)
7351 if (SvWEAKREF(sv)) {
7359 if (SvREFCNT(rv) != 1 || SvREADONLY(rv) || flags) /* SV_IMMEDIATE_UNREF */
7361 else /* XXX Hack, but hard to make $a=$a->[1] work otherwise */
7362 sv_2mortal(rv); /* Schedule for freeing later */
7366 =for apidoc sv_unref
7368 Unsets the RV status of the SV, and decrements the reference count of
7369 whatever was being referenced by the RV. This can almost be thought of
7370 as a reversal of C<newSVrv>. This is C<sv_unref_flags> with the C<flag>
7371 being zero. See C<SvROK_off>.
7377 Perl_sv_unref(pTHX_ SV *sv)
7379 sv_unref_flags(sv, 0);
7383 =for apidoc sv_taint
7385 Taint an SV. Use C<SvTAINTED_on> instead.
7390 Perl_sv_taint(pTHX_ SV *sv)
7392 sv_magic((sv), Nullsv, PERL_MAGIC_taint, Nullch, 0);
7396 =for apidoc sv_untaint
7398 Untaint an SV. Use C<SvTAINTED_off> instead.
7403 Perl_sv_untaint(pTHX_ SV *sv)
7405 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) {
7406 MAGIC *mg = mg_find(sv, PERL_MAGIC_taint);
7413 =for apidoc sv_tainted
7415 Test an SV for taintedness. Use C<SvTAINTED> instead.
7420 Perl_sv_tainted(pTHX_ SV *sv)
7422 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) {
7423 MAGIC *mg = mg_find(sv, PERL_MAGIC_taint);
7424 if (mg && ((mg->mg_len & 1) || ((mg->mg_len & 2) && mg->mg_obj == sv)))
7430 #if defined(PERL_IMPLICIT_CONTEXT)
7432 /* pTHX_ magic can't cope with varargs, so this is a no-context
7433 * version of the main function, (which may itself be aliased to us).
7434 * Don't access this version directly.
7438 Perl_sv_setpvf_nocontext(SV *sv, const char* pat, ...)
7442 va_start(args, pat);
7443 sv_vsetpvf(sv, pat, &args);
7447 /* pTHX_ magic can't cope with varargs, so this is a no-context
7448 * version of the main function, (which may itself be aliased to us).
7449 * Don't access this version directly.
7453 Perl_sv_setpvf_mg_nocontext(SV *sv, const char* pat, ...)
7457 va_start(args, pat);
7458 sv_vsetpvf_mg(sv, pat, &args);
7464 =for apidoc sv_setpvf
7466 Processes its arguments like C<sprintf> and sets an SV to the formatted
7467 output. Does not handle 'set' magic. See C<sv_setpvf_mg>.
7473 Perl_sv_setpvf(pTHX_ SV *sv, const char* pat, ...)
7476 va_start(args, pat);
7477 sv_vsetpvf(sv, pat, &args);
7481 /* backend for C<sv_setpvf> and C<sv_setpvf_nocontext> */
7484 Perl_sv_vsetpvf(pTHX_ SV *sv, const char* pat, va_list* args)
7486 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
7490 =for apidoc sv_setpvf_mg
7492 Like C<sv_setpvf>, but also handles 'set' magic.
7498 Perl_sv_setpvf_mg(pTHX_ SV *sv, const char* pat, ...)
7501 va_start(args, pat);
7502 sv_vsetpvf_mg(sv, pat, &args);
7506 /* backend for C<sv_setpvf_mg> C<setpvf_mg_nocontext> */
7509 Perl_sv_vsetpvf_mg(pTHX_ SV *sv, const char* pat, va_list* args)
7511 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
7515 #if defined(PERL_IMPLICIT_CONTEXT)
7517 /* pTHX_ magic can't cope with varargs, so this is a no-context
7518 * version of the main function, (which may itself be aliased to us).
7519 * Don't access this version directly.
7523 Perl_sv_catpvf_nocontext(SV *sv, const char* pat, ...)
7527 va_start(args, pat);
7528 sv_vcatpvf(sv, pat, &args);
7532 /* pTHX_ magic can't cope with varargs, so this is a no-context
7533 * version of the main function, (which may itself be aliased to us).
7534 * Don't access this version directly.
7538 Perl_sv_catpvf_mg_nocontext(SV *sv, const char* pat, ...)
7542 va_start(args, pat);
7543 sv_vcatpvf_mg(sv, pat, &args);
7549 =for apidoc sv_catpvf
7551 Processes its arguments like C<sprintf> and appends the formatted
7552 output to an SV. If the appended data contains "wide" characters
7553 (including, but not limited to, SVs with a UTF-8 PV formatted with %s,
7554 and characters >255 formatted with %c), the original SV might get
7555 upgraded to UTF-8. Handles 'get' magic, but not 'set' magic.
7556 C<SvSETMAGIC()> must typically be called after calling this function
7557 to handle 'set' magic.
7562 Perl_sv_catpvf(pTHX_ SV *sv, const char* pat, ...)
7565 va_start(args, pat);
7566 sv_vcatpvf(sv, pat, &args);
7570 /* backend for C<sv_catpvf> and C<catpvf_mg_nocontext> */
7573 Perl_sv_vcatpvf(pTHX_ SV *sv, const char* pat, va_list* args)
7575 sv_vcatpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
7579 =for apidoc sv_catpvf_mg
7581 Like C<sv_catpvf>, but also handles 'set' magic.
7587 Perl_sv_catpvf_mg(pTHX_ SV *sv, const char* pat, ...)
7590 va_start(args, pat);
7591 sv_vcatpvf_mg(sv, pat, &args);
7595 /* backend for C<catpvf_mg> and C<catpvf_mg_nocontext> */
7598 Perl_sv_vcatpvf_mg(pTHX_ SV *sv, const char* pat, va_list* args)
7600 sv_vcatpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
7605 =for apidoc sv_vsetpvfn
7607 Works like C<vcatpvfn> but copies the text into the SV instead of
7610 Usually used via one of its frontends C<sv_setpvf> and C<sv_setpvf_mg>.
7616 Perl_sv_vsetpvfn(pTHX_ SV *sv, const char *pat, STRLEN patlen, va_list *args, SV **svargs, I32 svmax, bool *maybe_tainted)
7618 sv_setpvn(sv, "", 0);
7619 sv_vcatpvfn(sv, pat, patlen, args, svargs, svmax, maybe_tainted);
7622 /* private function for use in sv_vcatpvfn via the EXPECT_NUMBER macro */
7625 S_expect_number(pTHX_ char** pattern)
7628 switch (**pattern) {
7629 case '1': case '2': case '3':
7630 case '4': case '5': case '6':
7631 case '7': case '8': case '9':
7632 while (isDIGIT(**pattern))
7633 var = var * 10 + (*(*pattern)++ - '0');
7637 #define EXPECT_NUMBER(pattern, var) (var = S_expect_number(aTHX_ &pattern))
7640 =for apidoc sv_vcatpvfn
7642 Processes its arguments like C<vsprintf> and appends the formatted output
7643 to an SV. Uses an array of SVs if the C style variable argument list is
7644 missing (NULL). When running with taint checks enabled, indicates via
7645 C<maybe_tainted> if results are untrustworthy (often due to the use of
7648 Usually used via one of its frontends C<sv_catpvf> and C<sv_catpvf_mg>.
7654 Perl_sv_vcatpvfn(pTHX_ SV *sv, const char *pat, STRLEN patlen, va_list *args, SV **svargs, I32 svmax, bool *maybe_tainted)
7661 static char nullstr[] = "(null)";
7663 bool has_utf8 = FALSE; /* has the result utf8? */
7665 /* no matter what, this is a string now */
7666 (void)SvPV_force(sv, origlen);
7668 /* special-case "", "%s", and "%_" */
7671 if (patlen == 2 && pat[0] == '%') {
7675 char *s = va_arg(*args, char*);
7676 sv_catpv(sv, s ? s : nullstr);
7678 else if (svix < svmax) {
7679 sv_catsv(sv, *svargs);
7680 if (DO_UTF8(*svargs))
7686 argsv = va_arg(*args, SV*);
7687 sv_catsv(sv, argsv);
7692 /* See comment on '_' below */
7697 if (!args && svix < svmax && DO_UTF8(*svargs))
7700 patend = (char*)pat + patlen;
7701 for (p = (char*)pat; p < patend; p = q) {
7704 bool vectorize = FALSE;
7705 bool vectorarg = FALSE;
7706 bool vec_utf8 = FALSE;
7712 bool has_precis = FALSE;
7714 bool is_utf8 = FALSE; /* is this item utf8? */
7717 U8 utf8buf[UTF8_MAXLEN+1];
7718 STRLEN esignlen = 0;
7720 char *eptr = Nullch;
7722 /* Times 4: a decimal digit takes more than 3 binary digits.
7723 * NV_DIG: mantissa takes than many decimal digits.
7724 * Plus 32: Playing safe. */
7725 char ebuf[IV_DIG * 4 + NV_DIG + 32];
7726 /* large enough for "%#.#f" --chip */
7727 /* what about long double NVs? --jhi */
7730 U8 *vecstr = Null(U8*);
7742 STRLEN dotstrlen = 1;
7743 I32 efix = 0; /* explicit format parameter index */
7744 I32 ewix = 0; /* explicit width index */
7745 I32 epix = 0; /* explicit precision index */
7746 I32 evix = 0; /* explicit vector index */
7747 bool asterisk = FALSE;
7749 /* echo everything up to the next format specification */
7750 for (q = p; q < patend && *q != '%'; ++q) ;
7752 sv_catpvn(sv, p, q - p);
7759 We allow format specification elements in this order:
7760 \d+\$ explicit format parameter index
7762 \*?(\d+\$)?v vector with optional (optionally specified) arg
7763 \d+|\*(\d+\$)? width using optional (optionally specified) arg
7764 \.(\d*|\*(\d+\$)?) precision using optional (optionally specified) arg
7766 [%bcdefginopsux_DFOUX] format (mandatory)
7768 if (EXPECT_NUMBER(q, width)) {
7809 if (EXPECT_NUMBER(q, ewix))
7818 if ((vectorarg = asterisk)) {
7828 EXPECT_NUMBER(q, width);
7833 vecsv = va_arg(*args, SV*);
7835 vecsv = (evix ? evix <= svmax : svix < svmax) ?
7836 svargs[ewix ? ewix-1 : svix++] : &PL_sv_undef;
7837 dotstr = SvPVx(vecsv, dotstrlen);
7842 vecsv = va_arg(*args, SV*);
7843 vecstr = (U8*)SvPVx(vecsv,veclen);
7844 vec_utf8 = DO_UTF8(vecsv);
7846 else if (efix ? efix <= svmax : svix < svmax) {
7847 vecsv = svargs[efix ? efix-1 : svix++];
7848 vecstr = (U8*)SvPVx(vecsv,veclen);
7849 vec_utf8 = DO_UTF8(vecsv);
7859 i = va_arg(*args, int);
7861 i = (ewix ? ewix <= svmax : svix < svmax) ?
7862 SvIVx(svargs[ewix ? ewix-1 : svix++]) : 0;
7864 width = (i < 0) ? -i : i;
7874 if (EXPECT_NUMBER(q, epix) && *q++ != '$') /* epix currently unused */
7877 i = va_arg(*args, int);
7879 i = (ewix ? ewix <= svmax : svix < svmax)
7880 ? SvIVx(svargs[ewix ? ewix-1 : svix++]) : 0;
7881 precis = (i < 0) ? 0 : i;
7886 precis = precis * 10 + (*q++ - '0');
7895 case 'I': /* Ix, I32x, and I64x */
7897 if (q[1] == '6' && q[2] == '4') {
7903 if (q[1] == '3' && q[2] == '2') {
7913 #if defined(HAS_QUAD) || (defined(HAS_LONG_DOUBLE) && defined(USE_LONG_DOUBLE))
7924 #if defined(HAS_QUAD) || (defined(HAS_LONG_DOUBLE) && defined(USE_LONG_DOUBLE))
7925 if (*(q + 1) == 'l') { /* lld, llf */
7948 argsv = (efix ? efix <= svmax : svix < svmax) ?
7949 svargs[efix ? efix-1 : svix++] : &PL_sv_undef;
7956 uv = args ? va_arg(*args, int) : SvIVx(argsv);
7958 (!UNI_IS_INVARIANT(uv) && SvUTF8(sv)))
7960 eptr = (char*)utf8buf;
7961 elen = uvchr_to_utf8((U8*)eptr, uv) - utf8buf;
7973 eptr = va_arg(*args, char*);
7975 #ifdef MACOS_TRADITIONAL
7976 /* On MacOS, %#s format is used for Pascal strings */
7981 elen = strlen(eptr);
7984 elen = sizeof nullstr - 1;
7988 eptr = SvPVx(argsv, elen);
7989 if (DO_UTF8(argsv)) {
7990 if (has_precis && precis < elen) {
7992 sv_pos_u2b(argsv, &p, 0); /* sticks at end */
7995 if (width) { /* fudge width (can't fudge elen) */
7996 width += elen - sv_len_utf8(argsv);
8005 * The "%_" hack might have to be changed someday,
8006 * if ISO or ANSI decide to use '_' for something.
8007 * So we keep it hidden from users' code.
8011 argsv = va_arg(*args, SV*);
8012 eptr = SvPVx(argsv, elen);
8018 if (has_precis && elen > precis)
8027 uv = PTR2UV(args ? va_arg(*args, void*) : argsv);
8045 uv = utf8n_to_uvchr(vecstr, veclen, &ulen,
8054 esignbuf[esignlen++] = plus;
8058 case 'h': iv = (short)va_arg(*args, int); break;
8059 default: iv = va_arg(*args, int); break;
8060 case 'l': iv = va_arg(*args, long); break;
8061 case 'V': iv = va_arg(*args, IV); break;
8063 case 'q': iv = va_arg(*args, Quad_t); break;
8070 case 'h': iv = (short)iv; break;
8072 case 'l': iv = (long)iv; break;
8075 case 'q': iv = (Quad_t)iv; break;
8079 if ( !vectorize ) /* we already set uv above */
8084 esignbuf[esignlen++] = plus;
8088 esignbuf[esignlen++] = '-';
8131 uv = utf8n_to_uvchr(vecstr, veclen, &ulen,
8142 case 'h': uv = (unsigned short)va_arg(*args, unsigned); break;
8143 default: uv = va_arg(*args, unsigned); break;
8144 case 'l': uv = va_arg(*args, unsigned long); break;
8145 case 'V': uv = va_arg(*args, UV); break;
8147 case 'q': uv = va_arg(*args, Quad_t); break;
8154 case 'h': uv = (unsigned short)uv; break;
8156 case 'l': uv = (unsigned long)uv; break;
8159 case 'q': uv = (Quad_t)uv; break;
8165 eptr = ebuf + sizeof ebuf;
8171 p = (char*)((c == 'X')
8172 ? "0123456789ABCDEF" : "0123456789abcdef");
8178 esignbuf[esignlen++] = '0';
8179 esignbuf[esignlen++] = c; /* 'x' or 'X' */
8185 *--eptr = '0' + dig;
8187 if (alt && *eptr != '0')
8193 *--eptr = '0' + dig;
8196 esignbuf[esignlen++] = '0';
8197 esignbuf[esignlen++] = 'b';
8200 default: /* it had better be ten or less */
8201 #if defined(PERL_Y2KWARN)
8202 if (ckWARN(WARN_Y2K)) {
8204 char *s = SvPV(sv,n);
8205 if (n >= 2 && s[n-2] == '1' && s[n-1] == '9'
8206 && (n == 2 || !isDIGIT(s[n-3])))
8208 Perl_warner(aTHX_ packWARN(WARN_Y2K),
8209 "Possible Y2K bug: %%%c %s",
8210 c, "format string following '19'");
8216 *--eptr = '0' + dig;
8217 } while (uv /= base);
8220 elen = (ebuf + sizeof ebuf) - eptr;
8223 zeros = precis - elen;
8224 else if (precis == 0 && elen == 1 && *eptr == '0')
8229 /* FLOATING POINT */
8232 c = 'f'; /* maybe %F isn't supported here */
8238 /* This is evil, but floating point is even more evil */
8241 nv = args ? va_arg(*args, NV) : SvNVx(argsv);
8244 if (c != 'e' && c != 'E') {
8246 (void)Perl_frexp(nv, &i);
8247 if (i == PERL_INT_MIN)
8248 Perl_die(aTHX_ "panic: frexp");
8250 need = BIT_DIGITS(i);
8252 need += has_precis ? precis : 6; /* known default */
8256 need += 20; /* fudge factor */
8257 if (PL_efloatsize < need) {
8258 Safefree(PL_efloatbuf);
8259 PL_efloatsize = need + 20; /* more fudge */
8260 New(906, PL_efloatbuf, PL_efloatsize, char);
8261 PL_efloatbuf[0] = '\0';
8264 eptr = ebuf + sizeof ebuf;
8267 #if defined(USE_LONG_DOUBLE) && defined(PERL_PRIfldbl)
8269 /* Copy the one or more characters in a long double
8270 * format before the 'base' ([efgEFG]) character to
8271 * the format string. */
8272 static char const prifldbl[] = PERL_PRIfldbl;
8273 char const *p = prifldbl + sizeof(prifldbl) - 3;
8274 while (p >= prifldbl) { *--eptr = *p--; }
8279 do { *--eptr = '0' + (base % 10); } while (base /= 10);
8284 do { *--eptr = '0' + (base % 10); } while (base /= 10);
8296 /* No taint. Otherwise we are in the strange situation
8297 * where printf() taints but print($float) doesn't.
8299 (void)sprintf(PL_efloatbuf, eptr, nv);
8301 eptr = PL_efloatbuf;
8302 elen = strlen(PL_efloatbuf);
8309 i = SvCUR(sv) - origlen;
8312 case 'h': *(va_arg(*args, short*)) = i; break;
8313 default: *(va_arg(*args, int*)) = i; break;
8314 case 'l': *(va_arg(*args, long*)) = i; break;
8315 case 'V': *(va_arg(*args, IV*)) = i; break;
8317 case 'q': *(va_arg(*args, Quad_t*)) = i; break;
8322 sv_setuv_mg(argsv, (UV)i);
8323 continue; /* not "break" */
8330 if (!args && ckWARN(WARN_PRINTF) &&
8331 (PL_op->op_type == OP_PRTF || PL_op->op_type == OP_SPRINTF)) {
8332 SV *msg = sv_newmortal();
8333 Perl_sv_setpvf(aTHX_ msg, "Invalid conversion in %s: ",
8334 (PL_op->op_type == OP_PRTF) ? "printf" : "sprintf");
8337 Perl_sv_catpvf(aTHX_ msg,
8338 "\"%%%c\"", c & 0xFF);
8340 Perl_sv_catpvf(aTHX_ msg,
8341 "\"%%\\%03"UVof"\"",
8344 sv_catpv(msg, "end of string");
8345 Perl_warner(aTHX_ packWARN(WARN_PRINTF), "%"SVf, msg); /* yes, this is reentrant */
8348 /* output mangled stuff ... */
8354 /* ... right here, because formatting flags should not apply */
8355 SvGROW(sv, SvCUR(sv) + elen + 1);
8357 Copy(eptr, p, elen, char);
8360 SvCUR(sv) = p - SvPVX(sv);
8361 continue; /* not "break" */
8364 if (is_utf8 != has_utf8) {
8367 sv_utf8_upgrade(sv);
8370 SV *nsv = sv_2mortal(newSVpvn(eptr, elen));
8371 sv_utf8_upgrade(nsv);
8375 SvGROW(sv, SvCUR(sv) + elen + 1);
8380 have = esignlen + zeros + elen;
8381 need = (have > width ? have : width);
8384 SvGROW(sv, SvCUR(sv) + need + dotstrlen + 1);
8386 if (esignlen && fill == '0') {
8387 for (i = 0; i < (int)esignlen; i++)
8391 memset(p, fill, gap);
8394 if (esignlen && fill != '0') {
8395 for (i = 0; i < (int)esignlen; i++)
8399 for (i = zeros; i; i--)
8403 Copy(eptr, p, elen, char);
8407 memset(p, ' ', gap);
8412 Copy(dotstr, p, dotstrlen, char);
8416 vectorize = FALSE; /* done iterating over vecstr */
8423 SvCUR(sv) = p - SvPVX(sv);
8431 /* =========================================================================
8433 =head1 Cloning an interpreter
8435 All the macros and functions in this section are for the private use of
8436 the main function, perl_clone().
8438 The foo_dup() functions make an exact copy of an existing foo thinngy.
8439 During the course of a cloning, a hash table is used to map old addresses
8440 to new addresses. The table is created and manipulated with the
8441 ptr_table_* functions.
8445 ============================================================================*/
8448 #if defined(USE_ITHREADS)
8450 #if defined(USE_5005THREADS)
8451 # include "error: USE_5005THREADS and USE_ITHREADS are incompatible"
8454 #ifndef GpREFCNT_inc
8455 # define GpREFCNT_inc(gp) ((gp) ? (++(gp)->gp_refcnt, (gp)) : (GP*)NULL)
8459 #define sv_dup_inc(s,t) SvREFCNT_inc(sv_dup(s,t))
8460 #define av_dup(s,t) (AV*)sv_dup((SV*)s,t)
8461 #define av_dup_inc(s,t) (AV*)SvREFCNT_inc(sv_dup((SV*)s,t))
8462 #define hv_dup(s,t) (HV*)sv_dup((SV*)s,t)
8463 #define hv_dup_inc(s,t) (HV*)SvREFCNT_inc(sv_dup((SV*)s,t))
8464 #define cv_dup(s,t) (CV*)sv_dup((SV*)s,t)
8465 #define cv_dup_inc(s,t) (CV*)SvREFCNT_inc(sv_dup((SV*)s,t))
8466 #define io_dup(s,t) (IO*)sv_dup((SV*)s,t)
8467 #define io_dup_inc(s,t) (IO*)SvREFCNT_inc(sv_dup((SV*)s,t))
8468 #define gv_dup(s,t) (GV*)sv_dup((SV*)s,t)
8469 #define gv_dup_inc(s,t) (GV*)SvREFCNT_inc(sv_dup((SV*)s,t))
8470 #define SAVEPV(p) (p ? savepv(p) : Nullch)
8471 #define SAVEPVN(p,n) (p ? savepvn(p,n) : Nullch)
8474 /* Duplicate a regexp. Required reading: pregcomp() and pregfree() in
8475 regcomp.c. AMS 20010712 */
8478 Perl_re_dup(pTHX_ REGEXP *r, CLONE_PARAMS *param)
8482 struct reg_substr_datum *s;
8485 return (REGEXP *)NULL;
8487 if ((ret = (REGEXP *)ptr_table_fetch(PL_ptr_table, r)))
8490 len = r->offsets[0];
8491 npar = r->nparens+1;
8493 Newc(0, ret, sizeof(regexp) + (len+1)*sizeof(regnode), char, regexp);
8494 Copy(r->program, ret->program, len+1, regnode);
8496 New(0, ret->startp, npar, I32);
8497 Copy(r->startp, ret->startp, npar, I32);
8498 New(0, ret->endp, npar, I32);
8499 Copy(r->startp, ret->startp, npar, I32);
8501 New(0, ret->substrs, 1, struct reg_substr_data);
8502 for (s = ret->substrs->data, i = 0; i < 3; i++, s++) {
8503 s->min_offset = r->substrs->data[i].min_offset;
8504 s->max_offset = r->substrs->data[i].max_offset;
8505 s->substr = sv_dup_inc(r->substrs->data[i].substr, param);
8506 s->utf8_substr = sv_dup_inc(r->substrs->data[i].utf8_substr, param);
8509 ret->regstclass = NULL;
8512 int count = r->data->count;
8514 Newc(0, d, sizeof(struct reg_data) + count*sizeof(void *),
8515 char, struct reg_data);
8516 New(0, d->what, count, U8);
8519 for (i = 0; i < count; i++) {
8520 d->what[i] = r->data->what[i];
8521 switch (d->what[i]) {
8523 d->data[i] = sv_dup_inc((SV *)r->data->data[i], param);
8526 d->data[i] = av_dup_inc((AV *)r->data->data[i], param);
8529 /* This is cheating. */
8530 New(0, d->data[i], 1, struct regnode_charclass_class);
8531 StructCopy(r->data->data[i], d->data[i],
8532 struct regnode_charclass_class);
8533 ret->regstclass = (regnode*)d->data[i];
8536 /* Compiled op trees are readonly, and can thus be
8537 shared without duplication. */
8538 d->data[i] = (void*)OpREFCNT_inc((OP*)r->data->data[i]);
8541 d->data[i] = r->data->data[i];
8551 New(0, ret->offsets, 2*len+1, U32);
8552 Copy(r->offsets, ret->offsets, 2*len+1, U32);
8554 ret->precomp = SAVEPV(r->precomp);
8555 ret->refcnt = r->refcnt;
8556 ret->minlen = r->minlen;
8557 ret->prelen = r->prelen;
8558 ret->nparens = r->nparens;
8559 ret->lastparen = r->lastparen;
8560 ret->lastcloseparen = r->lastcloseparen;
8561 ret->reganch = r->reganch;
8563 ret->sublen = r->sublen;
8565 if (RX_MATCH_COPIED(ret))
8566 ret->subbeg = SAVEPV(r->subbeg);
8568 ret->subbeg = Nullch;
8570 ptr_table_store(PL_ptr_table, r, ret);
8574 /* duplicate a file handle */
8577 Perl_fp_dup(pTHX_ PerlIO *fp, char type, CLONE_PARAMS *param)
8581 return (PerlIO*)NULL;
8583 /* look for it in the table first */
8584 ret = (PerlIO*)ptr_table_fetch(PL_ptr_table, fp);
8588 /* create anew and remember what it is */
8589 ret = PerlIO_fdupopen(aTHX_ fp, param, PERLIO_DUP_CLONE);
8590 ptr_table_store(PL_ptr_table, fp, ret);
8594 /* duplicate a directory handle */
8597 Perl_dirp_dup(pTHX_ DIR *dp)
8605 /* duplicate a typeglob */
8608 Perl_gp_dup(pTHX_ GP *gp, CLONE_PARAMS* param)
8613 /* look for it in the table first */
8614 ret = (GP*)ptr_table_fetch(PL_ptr_table, gp);
8618 /* create anew and remember what it is */
8619 Newz(0, ret, 1, GP);
8620 ptr_table_store(PL_ptr_table, gp, ret);
8623 ret->gp_refcnt = 0; /* must be before any other dups! */
8624 ret->gp_sv = sv_dup_inc(gp->gp_sv, param);
8625 ret->gp_io = io_dup_inc(gp->gp_io, param);
8626 ret->gp_form = cv_dup_inc(gp->gp_form, param);
8627 ret->gp_av = av_dup_inc(gp->gp_av, param);
8628 ret->gp_hv = hv_dup_inc(gp->gp_hv, param);
8629 ret->gp_egv = gv_dup(gp->gp_egv, param);/* GvEGV is not refcounted */
8630 ret->gp_cv = cv_dup_inc(gp->gp_cv, param);
8631 ret->gp_cvgen = gp->gp_cvgen;
8632 ret->gp_flags = gp->gp_flags;
8633 ret->gp_line = gp->gp_line;
8634 ret->gp_file = gp->gp_file; /* points to COP.cop_file */
8638 /* duplicate a chain of magic */
8641 Perl_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS* param)
8643 MAGIC *mgprev = (MAGIC*)NULL;
8646 return (MAGIC*)NULL;
8647 /* look for it in the table first */
8648 mgret = (MAGIC*)ptr_table_fetch(PL_ptr_table, mg);
8652 for (; mg; mg = mg->mg_moremagic) {
8654 Newz(0, nmg, 1, MAGIC);
8656 mgprev->mg_moremagic = nmg;
8659 nmg->mg_virtual = mg->mg_virtual; /* XXX copy dynamic vtable? */
8660 nmg->mg_private = mg->mg_private;
8661 nmg->mg_type = mg->mg_type;
8662 nmg->mg_flags = mg->mg_flags;
8663 if (mg->mg_type == PERL_MAGIC_qr) {
8664 nmg->mg_obj = (SV*)re_dup((REGEXP*)mg->mg_obj, param);
8666 else if(mg->mg_type == PERL_MAGIC_backref) {
8667 AV *av = (AV*) mg->mg_obj;
8670 nmg->mg_obj = (SV*)newAV();
8674 av_push((AV*)nmg->mg_obj,sv_dup(svp[i],param));
8679 nmg->mg_obj = (mg->mg_flags & MGf_REFCOUNTED)
8680 ? sv_dup_inc(mg->mg_obj, param)
8681 : sv_dup(mg->mg_obj, param);
8683 nmg->mg_len = mg->mg_len;
8684 nmg->mg_ptr = mg->mg_ptr; /* XXX random ptr? */
8685 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
8686 if (mg->mg_len > 0) {
8687 nmg->mg_ptr = SAVEPVN(mg->mg_ptr, mg->mg_len);
8688 if (mg->mg_type == PERL_MAGIC_overload_table &&
8689 AMT_AMAGIC((AMT*)mg->mg_ptr))
8691 AMT *amtp = (AMT*)mg->mg_ptr;
8692 AMT *namtp = (AMT*)nmg->mg_ptr;
8694 for (i = 1; i < NofAMmeth; i++) {
8695 namtp->table[i] = cv_dup_inc(amtp->table[i], param);
8699 else if (mg->mg_len == HEf_SVKEY)
8700 nmg->mg_ptr = (char*)sv_dup_inc((SV*)mg->mg_ptr, param);
8702 if ((mg->mg_flags & MGf_DUP) && mg->mg_virtual && mg->mg_virtual->svt_dup) {
8703 CALL_FPTR(nmg->mg_virtual->svt_dup)(aTHX_ nmg, param);
8710 /* create a new pointer-mapping table */
8713 Perl_ptr_table_new(pTHX)
8716 Newz(0, tbl, 1, PTR_TBL_t);
8719 Newz(0, tbl->tbl_ary, tbl->tbl_max + 1, PTR_TBL_ENT_t*);
8723 /* map an existing pointer using a table */
8726 Perl_ptr_table_fetch(pTHX_ PTR_TBL_t *tbl, void *sv)
8728 PTR_TBL_ENT_t *tblent;
8729 UV hash = PTR2UV(sv);
8731 tblent = tbl->tbl_ary[hash & tbl->tbl_max];
8732 for (; tblent; tblent = tblent->next) {
8733 if (tblent->oldval == sv)
8734 return tblent->newval;
8739 /* add a new entry to a pointer-mapping table */
8742 Perl_ptr_table_store(pTHX_ PTR_TBL_t *tbl, void *oldv, void *newv)
8744 PTR_TBL_ENT_t *tblent, **otblent;
8745 /* XXX this may be pessimal on platforms where pointers aren't good
8746 * hash values e.g. if they grow faster in the most significant
8748 UV hash = PTR2UV(oldv);
8752 otblent = &tbl->tbl_ary[hash & tbl->tbl_max];
8753 for (tblent = *otblent; tblent; i=0, tblent = tblent->next) {
8754 if (tblent->oldval == oldv) {
8755 tblent->newval = newv;
8760 Newz(0, tblent, 1, PTR_TBL_ENT_t);
8761 tblent->oldval = oldv;
8762 tblent->newval = newv;
8763 tblent->next = *otblent;
8766 if (i && tbl->tbl_items > tbl->tbl_max)
8767 ptr_table_split(tbl);
8770 /* double the hash bucket size of an existing ptr table */
8773 Perl_ptr_table_split(pTHX_ PTR_TBL_t *tbl)
8775 PTR_TBL_ENT_t **ary = tbl->tbl_ary;
8776 UV oldsize = tbl->tbl_max + 1;
8777 UV newsize = oldsize * 2;
8780 Renew(ary, newsize, PTR_TBL_ENT_t*);
8781 Zero(&ary[oldsize], newsize-oldsize, PTR_TBL_ENT_t*);
8782 tbl->tbl_max = --newsize;
8784 for (i=0; i < oldsize; i++, ary++) {
8785 PTR_TBL_ENT_t **curentp, **entp, *ent;
8788 curentp = ary + oldsize;
8789 for (entp = ary, ent = *ary; ent; ent = *entp) {
8790 if ((newsize & PTR2UV(ent->oldval)) != i) {
8792 ent->next = *curentp;
8802 /* remove all the entries from a ptr table */
8805 Perl_ptr_table_clear(pTHX_ PTR_TBL_t *tbl)
8807 register PTR_TBL_ENT_t **array;
8808 register PTR_TBL_ENT_t *entry;
8809 register PTR_TBL_ENT_t *oentry = Null(PTR_TBL_ENT_t*);
8813 if (!tbl || !tbl->tbl_items) {
8817 array = tbl->tbl_ary;
8824 entry = entry->next;
8828 if (++riter > max) {
8831 entry = array[riter];
8838 /* clear and free a ptr table */
8841 Perl_ptr_table_free(pTHX_ PTR_TBL_t *tbl)
8846 ptr_table_clear(tbl);
8847 Safefree(tbl->tbl_ary);
8855 /* attempt to make everything in the typeglob readonly */
8858 S_gv_share(pTHX_ SV *sstr)
8861 SV *sv = &PL_sv_no; /* just need SvREADONLY-ness */
8863 if (GvIO(gv) || GvFORM(gv)) {
8864 GvUNIQUE_off(gv); /* GvIOs cannot be shared. nor can GvFORMs */
8866 else if (!GvCV(gv)) {
8870 /* CvPADLISTs cannot be shared */
8871 if (!CvXSUB(GvCV(gv))) {
8876 if (!GvUNIQUE(gv)) {
8878 PerlIO_printf(Perl_debug_log, "gv_share: unable to share %s::%s\n",
8879 HvNAME(GvSTASH(gv)), GvNAME(gv));
8885 * write attempts will die with
8886 * "Modification of a read-only value attempted"
8892 SvREADONLY_on(GvSV(gv));
8899 SvREADONLY_on(GvAV(gv));
8906 SvREADONLY_on(GvAV(gv));
8909 return sstr; /* he_dup() will SvREFCNT_inc() */
8912 /* duplicate an SV of any type (including AV, HV etc) */
8915 Perl_rvpv_dup(pTHX_ SV *dstr, SV *sstr, CLONE_PARAMS* param)
8918 SvRV(dstr) = SvWEAKREF(sstr)
8919 ? sv_dup(SvRV(sstr), param)
8920 : sv_dup_inc(SvRV(sstr), param);
8922 else if (SvPVX(sstr)) {
8923 /* Has something there */
8925 /* Normal PV - clone whole allocated space */
8926 SvPVX(dstr) = SAVEPVN(SvPVX(sstr), SvLEN(sstr)-1);
8929 /* Special case - not normally malloced for some reason */
8930 if (SvREADONLY(sstr) && SvFAKE(sstr)) {
8931 /* A "shared" PV - clone it as unshared string */
8933 SvREADONLY_off(dstr);
8934 SvPVX(dstr) = SAVEPVN(SvPVX(sstr), SvCUR(sstr));
8937 /* Some other special case - random pointer */
8938 SvPVX(dstr) = SvPVX(sstr);
8944 SvPVX(dstr) = SvPVX(sstr);
8949 Perl_sv_dup(pTHX_ SV *sstr, CLONE_PARAMS* param)
8953 if (!sstr || SvTYPE(sstr) == SVTYPEMASK)
8955 /* look for it in the table first */
8956 dstr = (SV*)ptr_table_fetch(PL_ptr_table, sstr);
8960 /* create anew and remember what it is */
8962 ptr_table_store(PL_ptr_table, sstr, dstr);
8965 SvFLAGS(dstr) = SvFLAGS(sstr);
8966 SvFLAGS(dstr) &= ~SVf_OOK; /* don't propagate OOK hack */
8967 SvREFCNT(dstr) = 0; /* must be before any other dups! */
8970 if (SvANY(sstr) && PL_watch_pvx && SvPVX(sstr) == PL_watch_pvx)
8971 PerlIO_printf(Perl_debug_log, "watch at %p hit, found string \"%s\"\n",
8972 PL_watch_pvx, SvPVX(sstr));
8975 switch (SvTYPE(sstr)) {
8980 SvANY(dstr) = new_XIV();
8981 SvIVX(dstr) = SvIVX(sstr);
8984 SvANY(dstr) = new_XNV();
8985 SvNVX(dstr) = SvNVX(sstr);
8988 SvANY(dstr) = new_XRV();
8989 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
8992 SvANY(dstr) = new_XPV();
8993 SvCUR(dstr) = SvCUR(sstr);
8994 SvLEN(dstr) = SvLEN(sstr);
8995 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
8998 SvANY(dstr) = new_XPVIV();
8999 SvCUR(dstr) = SvCUR(sstr);
9000 SvLEN(dstr) = SvLEN(sstr);
9001 SvIVX(dstr) = SvIVX(sstr);
9002 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9005 SvANY(dstr) = new_XPVNV();
9006 SvCUR(dstr) = SvCUR(sstr);
9007 SvLEN(dstr) = SvLEN(sstr);
9008 SvIVX(dstr) = SvIVX(sstr);
9009 SvNVX(dstr) = SvNVX(sstr);
9010 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9013 SvANY(dstr) = new_XPVMG();
9014 SvCUR(dstr) = SvCUR(sstr);
9015 SvLEN(dstr) = SvLEN(sstr);
9016 SvIVX(dstr) = SvIVX(sstr);
9017 SvNVX(dstr) = SvNVX(sstr);
9018 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9019 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9020 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9023 SvANY(dstr) = new_XPVBM();
9024 SvCUR(dstr) = SvCUR(sstr);
9025 SvLEN(dstr) = SvLEN(sstr);
9026 SvIVX(dstr) = SvIVX(sstr);
9027 SvNVX(dstr) = SvNVX(sstr);
9028 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9029 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9030 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9031 BmRARE(dstr) = BmRARE(sstr);
9032 BmUSEFUL(dstr) = BmUSEFUL(sstr);
9033 BmPREVIOUS(dstr)= BmPREVIOUS(sstr);
9036 SvANY(dstr) = new_XPVLV();
9037 SvCUR(dstr) = SvCUR(sstr);
9038 SvLEN(dstr) = SvLEN(sstr);
9039 SvIVX(dstr) = SvIVX(sstr);
9040 SvNVX(dstr) = SvNVX(sstr);
9041 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9042 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9043 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9044 LvTARGOFF(dstr) = LvTARGOFF(sstr); /* XXX sometimes holds PMOP* when DEBUGGING */
9045 LvTARGLEN(dstr) = LvTARGLEN(sstr);
9046 LvTARG(dstr) = sv_dup_inc(LvTARG(sstr), param);
9047 LvTYPE(dstr) = LvTYPE(sstr);
9050 if (GvUNIQUE((GV*)sstr)) {
9052 if ((share = gv_share(sstr))) {
9056 PerlIO_printf(Perl_debug_log, "sv_dup: sharing %s::%s\n",
9057 HvNAME(GvSTASH(share)), GvNAME(share));
9062 SvANY(dstr) = new_XPVGV();
9063 SvCUR(dstr) = SvCUR(sstr);
9064 SvLEN(dstr) = SvLEN(sstr);
9065 SvIVX(dstr) = SvIVX(sstr);
9066 SvNVX(dstr) = SvNVX(sstr);
9067 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9068 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9069 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9070 GvNAMELEN(dstr) = GvNAMELEN(sstr);
9071 GvNAME(dstr) = SAVEPVN(GvNAME(sstr), GvNAMELEN(sstr));
9072 GvSTASH(dstr) = hv_dup_inc(GvSTASH(sstr), param);
9073 GvFLAGS(dstr) = GvFLAGS(sstr);
9074 GvGP(dstr) = gp_dup(GvGP(sstr), param);
9075 (void)GpREFCNT_inc(GvGP(dstr));
9078 SvANY(dstr) = new_XPVIO();
9079 SvCUR(dstr) = SvCUR(sstr);
9080 SvLEN(dstr) = SvLEN(sstr);
9081 SvIVX(dstr) = SvIVX(sstr);
9082 SvNVX(dstr) = SvNVX(sstr);
9083 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9084 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9085 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9086 IoIFP(dstr) = fp_dup(IoIFP(sstr), IoTYPE(sstr), param);
9087 if (IoOFP(sstr) == IoIFP(sstr))
9088 IoOFP(dstr) = IoIFP(dstr);
9090 IoOFP(dstr) = fp_dup(IoOFP(sstr), IoTYPE(sstr), param);
9091 /* PL_rsfp_filters entries have fake IoDIRP() */
9092 if (IoDIRP(sstr) && !(IoFLAGS(sstr) & IOf_FAKE_DIRP))
9093 IoDIRP(dstr) = dirp_dup(IoDIRP(sstr));
9095 IoDIRP(dstr) = IoDIRP(sstr);
9096 IoLINES(dstr) = IoLINES(sstr);
9097 IoPAGE(dstr) = IoPAGE(sstr);
9098 IoPAGE_LEN(dstr) = IoPAGE_LEN(sstr);
9099 IoLINES_LEFT(dstr) = IoLINES_LEFT(sstr);
9100 IoTOP_NAME(dstr) = SAVEPV(IoTOP_NAME(sstr));
9101 IoTOP_GV(dstr) = gv_dup(IoTOP_GV(sstr), param);
9102 IoFMT_NAME(dstr) = SAVEPV(IoFMT_NAME(sstr));
9103 IoFMT_GV(dstr) = gv_dup(IoFMT_GV(sstr), param);
9104 IoBOTTOM_NAME(dstr) = SAVEPV(IoBOTTOM_NAME(sstr));
9105 IoBOTTOM_GV(dstr) = gv_dup(IoBOTTOM_GV(sstr), param);
9106 IoSUBPROCESS(dstr) = IoSUBPROCESS(sstr);
9107 IoTYPE(dstr) = IoTYPE(sstr);
9108 IoFLAGS(dstr) = IoFLAGS(sstr);
9111 SvANY(dstr) = new_XPVAV();
9112 SvCUR(dstr) = SvCUR(sstr);
9113 SvLEN(dstr) = SvLEN(sstr);
9114 SvIVX(dstr) = SvIVX(sstr);
9115 SvNVX(dstr) = SvNVX(sstr);
9116 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9117 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9118 AvARYLEN((AV*)dstr) = sv_dup_inc(AvARYLEN((AV*)sstr), param);
9119 AvFLAGS((AV*)dstr) = AvFLAGS((AV*)sstr);
9120 if (AvARRAY((AV*)sstr)) {
9121 SV **dst_ary, **src_ary;
9122 SSize_t items = AvFILLp((AV*)sstr) + 1;
9124 src_ary = AvARRAY((AV*)sstr);
9125 Newz(0, dst_ary, AvMAX((AV*)sstr)+1, SV*);
9126 ptr_table_store(PL_ptr_table, src_ary, dst_ary);
9127 SvPVX(dstr) = (char*)dst_ary;
9128 AvALLOC((AV*)dstr) = dst_ary;
9129 if (AvREAL((AV*)sstr)) {
9131 *dst_ary++ = sv_dup_inc(*src_ary++, param);
9135 *dst_ary++ = sv_dup(*src_ary++, param);
9137 items = AvMAX((AV*)sstr) - AvFILLp((AV*)sstr);
9138 while (items-- > 0) {
9139 *dst_ary++ = &PL_sv_undef;
9143 SvPVX(dstr) = Nullch;
9144 AvALLOC((AV*)dstr) = (SV**)NULL;
9148 SvANY(dstr) = new_XPVHV();
9149 SvCUR(dstr) = SvCUR(sstr);
9150 SvLEN(dstr) = SvLEN(sstr);
9151 SvIVX(dstr) = SvIVX(sstr);
9152 SvNVX(dstr) = SvNVX(sstr);
9153 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9154 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9155 HvRITER((HV*)dstr) = HvRITER((HV*)sstr);
9156 if (HvARRAY((HV*)sstr)) {
9158 XPVHV *dxhv = (XPVHV*)SvANY(dstr);
9159 XPVHV *sxhv = (XPVHV*)SvANY(sstr);
9160 Newz(0, dxhv->xhv_array,
9161 PERL_HV_ARRAY_ALLOC_BYTES(dxhv->xhv_max+1), char);
9162 while (i <= sxhv->xhv_max) {
9163 ((HE**)dxhv->xhv_array)[i] = he_dup(((HE**)sxhv->xhv_array)[i],
9164 (bool)!!HvSHAREKEYS(sstr),
9168 dxhv->xhv_eiter = he_dup(sxhv->xhv_eiter,
9169 (bool)!!HvSHAREKEYS(sstr), param);
9172 SvPVX(dstr) = Nullch;
9173 HvEITER((HV*)dstr) = (HE*)NULL;
9175 HvPMROOT((HV*)dstr) = HvPMROOT((HV*)sstr); /* XXX */
9176 HvNAME((HV*)dstr) = SAVEPV(HvNAME((HV*)sstr));
9177 /* Record stashes for possible cloning in Perl_clone(). */
9178 if(HvNAME((HV*)dstr))
9179 av_push(param->stashes, dstr);
9182 SvANY(dstr) = new_XPVFM();
9183 FmLINES(dstr) = FmLINES(sstr);
9187 SvANY(dstr) = new_XPVCV();
9189 SvCUR(dstr) = SvCUR(sstr);
9190 SvLEN(dstr) = SvLEN(sstr);
9191 SvIVX(dstr) = SvIVX(sstr);
9192 SvNVX(dstr) = SvNVX(sstr);
9193 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9194 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9195 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9196 CvSTASH(dstr) = hv_dup(CvSTASH(sstr), param); /* NOTE: not refcounted */
9197 CvSTART(dstr) = CvSTART(sstr);
9198 CvROOT(dstr) = OpREFCNT_inc(CvROOT(sstr));
9199 CvXSUB(dstr) = CvXSUB(sstr);
9200 CvXSUBANY(dstr) = CvXSUBANY(sstr);
9201 if (CvCONST(sstr)) {
9202 CvXSUBANY(dstr).any_ptr = GvUNIQUE(CvGV(sstr)) ?
9203 SvREFCNT_inc(CvXSUBANY(sstr).any_ptr) :
9204 sv_dup_inc(CvXSUBANY(sstr).any_ptr, param);
9206 CvGV(dstr) = gv_dup(CvGV(sstr), param);
9207 if (param->flags & CLONEf_COPY_STACKS) {
9208 CvDEPTH(dstr) = CvDEPTH(sstr);
9212 if (CvPADLIST(sstr) && !AvREAL(CvPADLIST(sstr))) {
9213 /* XXX padlists are real, but pretend to be not */
9214 AvREAL_on(CvPADLIST(sstr));
9215 CvPADLIST(dstr) = av_dup_inc(CvPADLIST(sstr), param);
9216 AvREAL_off(CvPADLIST(sstr));
9217 AvREAL_off(CvPADLIST(dstr));
9220 CvPADLIST(dstr) = av_dup_inc(CvPADLIST(sstr), param);
9221 if (!CvANON(sstr) || CvCLONED(sstr))
9222 CvOUTSIDE(dstr) = cv_dup_inc(CvOUTSIDE(sstr), param);
9224 CvOUTSIDE(dstr) = cv_dup(CvOUTSIDE(sstr), param);
9225 CvFLAGS(dstr) = CvFLAGS(sstr);
9226 CvFILE(dstr) = CvXSUB(sstr) ? CvFILE(sstr) : SAVEPV(CvFILE(sstr));
9229 Perl_croak(aTHX_ "Bizarre SvTYPE [%" IVdf "]", (IV)SvTYPE(sstr));
9233 if (SvOBJECT(dstr) && SvTYPE(dstr) != SVt_PVIO)
9239 /* duplicate a context */
9242 Perl_cx_dup(pTHX_ PERL_CONTEXT *cxs, I32 ix, I32 max, CLONE_PARAMS* param)
9247 return (PERL_CONTEXT*)NULL;
9249 /* look for it in the table first */
9250 ncxs = (PERL_CONTEXT*)ptr_table_fetch(PL_ptr_table, cxs);
9254 /* create anew and remember what it is */
9255 Newz(56, ncxs, max + 1, PERL_CONTEXT);
9256 ptr_table_store(PL_ptr_table, cxs, ncxs);
9259 PERL_CONTEXT *cx = &cxs[ix];
9260 PERL_CONTEXT *ncx = &ncxs[ix];
9261 ncx->cx_type = cx->cx_type;
9262 if (CxTYPE(cx) == CXt_SUBST) {
9263 Perl_croak(aTHX_ "Cloning substitution context is unimplemented");
9266 ncx->blk_oldsp = cx->blk_oldsp;
9267 ncx->blk_oldcop = cx->blk_oldcop;
9268 ncx->blk_oldretsp = cx->blk_oldretsp;
9269 ncx->blk_oldmarksp = cx->blk_oldmarksp;
9270 ncx->blk_oldscopesp = cx->blk_oldscopesp;
9271 ncx->blk_oldpm = cx->blk_oldpm;
9272 ncx->blk_gimme = cx->blk_gimme;
9273 switch (CxTYPE(cx)) {
9275 ncx->blk_sub.cv = (cx->blk_sub.olddepth == 0
9276 ? cv_dup_inc(cx->blk_sub.cv, param)
9277 : cv_dup(cx->blk_sub.cv,param));
9278 ncx->blk_sub.argarray = (cx->blk_sub.hasargs
9279 ? av_dup_inc(cx->blk_sub.argarray, param)
9281 ncx->blk_sub.savearray = av_dup_inc(cx->blk_sub.savearray, param);
9282 ncx->blk_sub.olddepth = cx->blk_sub.olddepth;
9283 ncx->blk_sub.hasargs = cx->blk_sub.hasargs;
9284 ncx->blk_sub.lval = cx->blk_sub.lval;
9287 ncx->blk_eval.old_in_eval = cx->blk_eval.old_in_eval;
9288 ncx->blk_eval.old_op_type = cx->blk_eval.old_op_type;
9289 ncx->blk_eval.old_namesv = sv_dup_inc(cx->blk_eval.old_namesv, param);;
9290 ncx->blk_eval.old_eval_root = cx->blk_eval.old_eval_root;
9291 ncx->blk_eval.cur_text = sv_dup(cx->blk_eval.cur_text, param);
9294 ncx->blk_loop.label = cx->blk_loop.label;
9295 ncx->blk_loop.resetsp = cx->blk_loop.resetsp;
9296 ncx->blk_loop.redo_op = cx->blk_loop.redo_op;
9297 ncx->blk_loop.next_op = cx->blk_loop.next_op;
9298 ncx->blk_loop.last_op = cx->blk_loop.last_op;
9299 ncx->blk_loop.iterdata = (CxPADLOOP(cx)
9300 ? cx->blk_loop.iterdata
9301 : gv_dup((GV*)cx->blk_loop.iterdata, param));
9302 ncx->blk_loop.oldcurpad
9303 = (SV**)ptr_table_fetch(PL_ptr_table,
9304 cx->blk_loop.oldcurpad);
9305 ncx->blk_loop.itersave = sv_dup_inc(cx->blk_loop.itersave, param);
9306 ncx->blk_loop.iterlval = sv_dup_inc(cx->blk_loop.iterlval, param);
9307 ncx->blk_loop.iterary = av_dup_inc(cx->blk_loop.iterary, param);
9308 ncx->blk_loop.iterix = cx->blk_loop.iterix;
9309 ncx->blk_loop.itermax = cx->blk_loop.itermax;
9312 ncx->blk_sub.cv = cv_dup(cx->blk_sub.cv, param);
9313 ncx->blk_sub.gv = gv_dup(cx->blk_sub.gv, param);
9314 ncx->blk_sub.dfoutgv = gv_dup_inc(cx->blk_sub.dfoutgv, param);
9315 ncx->blk_sub.hasargs = cx->blk_sub.hasargs;
9327 /* duplicate a stack info structure */
9330 Perl_si_dup(pTHX_ PERL_SI *si, CLONE_PARAMS* param)
9335 return (PERL_SI*)NULL;
9337 /* look for it in the table first */
9338 nsi = (PERL_SI*)ptr_table_fetch(PL_ptr_table, si);
9342 /* create anew and remember what it is */
9343 Newz(56, nsi, 1, PERL_SI);
9344 ptr_table_store(PL_ptr_table, si, nsi);
9346 nsi->si_stack = av_dup_inc(si->si_stack, param);
9347 nsi->si_cxix = si->si_cxix;
9348 nsi->si_cxmax = si->si_cxmax;
9349 nsi->si_cxstack = cx_dup(si->si_cxstack, si->si_cxix, si->si_cxmax, param);
9350 nsi->si_type = si->si_type;
9351 nsi->si_prev = si_dup(si->si_prev, param);
9352 nsi->si_next = si_dup(si->si_next, param);
9353 nsi->si_markoff = si->si_markoff;
9358 #define POPINT(ss,ix) ((ss)[--(ix)].any_i32)
9359 #define TOPINT(ss,ix) ((ss)[ix].any_i32)
9360 #define POPLONG(ss,ix) ((ss)[--(ix)].any_long)
9361 #define TOPLONG(ss,ix) ((ss)[ix].any_long)
9362 #define POPIV(ss,ix) ((ss)[--(ix)].any_iv)
9363 #define TOPIV(ss,ix) ((ss)[ix].any_iv)
9364 #define POPPTR(ss,ix) ((ss)[--(ix)].any_ptr)
9365 #define TOPPTR(ss,ix) ((ss)[ix].any_ptr)
9366 #define POPDPTR(ss,ix) ((ss)[--(ix)].any_dptr)
9367 #define TOPDPTR(ss,ix) ((ss)[ix].any_dptr)
9368 #define POPDXPTR(ss,ix) ((ss)[--(ix)].any_dxptr)
9369 #define TOPDXPTR(ss,ix) ((ss)[ix].any_dxptr)
9372 #define pv_dup_inc(p) SAVEPV(p)
9373 #define pv_dup(p) SAVEPV(p)
9374 #define svp_dup_inc(p,pp) any_dup(p,pp)
9376 /* map any object to the new equivent - either something in the
9377 * ptr table, or something in the interpreter structure
9381 Perl_any_dup(pTHX_ void *v, PerlInterpreter *proto_perl)
9388 /* look for it in the table first */
9389 ret = ptr_table_fetch(PL_ptr_table, v);
9393 /* see if it is part of the interpreter structure */
9394 if (v >= (void*)proto_perl && v < (void*)(proto_perl+1))
9395 ret = (void*)(((char*)aTHX) + (((char*)v) - (char*)proto_perl));
9403 /* duplicate the save stack */
9406 Perl_ss_dup(pTHX_ PerlInterpreter *proto_perl, CLONE_PARAMS* param)
9408 ANY *ss = proto_perl->Tsavestack;
9409 I32 ix = proto_perl->Tsavestack_ix;
9410 I32 max = proto_perl->Tsavestack_max;
9423 void (*dptr) (void*);
9424 void (*dxptr) (pTHX_ void*);
9427 Newz(54, nss, max, ANY);
9433 case SAVEt_ITEM: /* normal string */
9434 sv = (SV*)POPPTR(ss,ix);
9435 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9436 sv = (SV*)POPPTR(ss,ix);
9437 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9439 case SAVEt_SV: /* scalar reference */
9440 sv = (SV*)POPPTR(ss,ix);
9441 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9442 gv = (GV*)POPPTR(ss,ix);
9443 TOPPTR(nss,ix) = gv_dup_inc(gv, param);
9445 case SAVEt_GENERIC_PVREF: /* generic char* */
9446 c = (char*)POPPTR(ss,ix);
9447 TOPPTR(nss,ix) = pv_dup(c);
9448 ptr = POPPTR(ss,ix);
9449 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9451 case SAVEt_SHARED_PVREF: /* char* in shared space */
9452 c = (char*)POPPTR(ss,ix);
9453 TOPPTR(nss,ix) = savesharedpv(c);
9454 ptr = POPPTR(ss,ix);
9455 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9457 case SAVEt_GENERIC_SVREF: /* generic sv */
9458 case SAVEt_SVREF: /* scalar reference */
9459 sv = (SV*)POPPTR(ss,ix);
9460 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9461 ptr = POPPTR(ss,ix);
9462 TOPPTR(nss,ix) = svp_dup_inc((SV**)ptr, proto_perl);/* XXXXX */
9464 case SAVEt_AV: /* array reference */
9465 av = (AV*)POPPTR(ss,ix);
9466 TOPPTR(nss,ix) = av_dup_inc(av, param);
9467 gv = (GV*)POPPTR(ss,ix);
9468 TOPPTR(nss,ix) = gv_dup(gv, param);
9470 case SAVEt_HV: /* hash reference */
9471 hv = (HV*)POPPTR(ss,ix);
9472 TOPPTR(nss,ix) = hv_dup_inc(hv, param);
9473 gv = (GV*)POPPTR(ss,ix);
9474 TOPPTR(nss,ix) = gv_dup(gv, param);
9476 case SAVEt_INT: /* int reference */
9477 ptr = POPPTR(ss,ix);
9478 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9479 intval = (int)POPINT(ss,ix);
9480 TOPINT(nss,ix) = intval;
9482 case SAVEt_LONG: /* long reference */
9483 ptr = POPPTR(ss,ix);
9484 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9485 longval = (long)POPLONG(ss,ix);
9486 TOPLONG(nss,ix) = longval;
9488 case SAVEt_I32: /* I32 reference */
9489 case SAVEt_I16: /* I16 reference */
9490 case SAVEt_I8: /* I8 reference */
9491 ptr = POPPTR(ss,ix);
9492 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9496 case SAVEt_IV: /* IV reference */
9497 ptr = POPPTR(ss,ix);
9498 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9502 case SAVEt_SPTR: /* SV* reference */
9503 ptr = POPPTR(ss,ix);
9504 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9505 sv = (SV*)POPPTR(ss,ix);
9506 TOPPTR(nss,ix) = sv_dup(sv, param);
9508 case SAVEt_VPTR: /* random* reference */
9509 ptr = POPPTR(ss,ix);
9510 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9511 ptr = POPPTR(ss,ix);
9512 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9514 case SAVEt_PPTR: /* char* reference */
9515 ptr = POPPTR(ss,ix);
9516 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9517 c = (char*)POPPTR(ss,ix);
9518 TOPPTR(nss,ix) = pv_dup(c);
9520 case SAVEt_HPTR: /* HV* reference */
9521 ptr = POPPTR(ss,ix);
9522 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9523 hv = (HV*)POPPTR(ss,ix);
9524 TOPPTR(nss,ix) = hv_dup(hv, param);
9526 case SAVEt_APTR: /* AV* reference */
9527 ptr = POPPTR(ss,ix);
9528 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9529 av = (AV*)POPPTR(ss,ix);
9530 TOPPTR(nss,ix) = av_dup(av, param);
9533 gv = (GV*)POPPTR(ss,ix);
9534 TOPPTR(nss,ix) = gv_dup(gv, param);
9536 case SAVEt_GP: /* scalar reference */
9537 gp = (GP*)POPPTR(ss,ix);
9538 TOPPTR(nss,ix) = gp = gp_dup(gp, param);
9539 (void)GpREFCNT_inc(gp);
9540 gv = (GV*)POPPTR(ss,ix);
9541 TOPPTR(nss,ix) = gv_dup_inc(gv, param);
9542 c = (char*)POPPTR(ss,ix);
9543 TOPPTR(nss,ix) = pv_dup(c);
9550 case SAVEt_MORTALIZESV:
9551 sv = (SV*)POPPTR(ss,ix);
9552 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9555 ptr = POPPTR(ss,ix);
9556 if (ptr && (((OP*)ptr)->op_private & OPpREFCOUNTED)) {
9557 /* these are assumed to be refcounted properly */
9558 switch (((OP*)ptr)->op_type) {
9565 TOPPTR(nss,ix) = ptr;
9570 TOPPTR(nss,ix) = Nullop;
9575 TOPPTR(nss,ix) = Nullop;
9578 c = (char*)POPPTR(ss,ix);
9579 TOPPTR(nss,ix) = pv_dup_inc(c);
9582 longval = POPLONG(ss,ix);
9583 TOPLONG(nss,ix) = longval;
9586 hv = (HV*)POPPTR(ss,ix);
9587 TOPPTR(nss,ix) = hv_dup_inc(hv, param);
9588 c = (char*)POPPTR(ss,ix);
9589 TOPPTR(nss,ix) = pv_dup_inc(c);
9593 case SAVEt_DESTRUCTOR:
9594 ptr = POPPTR(ss,ix);
9595 TOPPTR(nss,ix) = any_dup(ptr, proto_perl); /* XXX quite arbitrary */
9596 dptr = POPDPTR(ss,ix);
9597 TOPDPTR(nss,ix) = (void (*)(void*))any_dup((void *)dptr, proto_perl);
9599 case SAVEt_DESTRUCTOR_X:
9600 ptr = POPPTR(ss,ix);
9601 TOPPTR(nss,ix) = any_dup(ptr, proto_perl); /* XXX quite arbitrary */
9602 dxptr = POPDXPTR(ss,ix);
9603 TOPDXPTR(nss,ix) = (void (*)(pTHX_ void*))any_dup((void *)dxptr, proto_perl);
9605 case SAVEt_REGCONTEXT:
9611 case SAVEt_STACK_POS: /* Position on Perl stack */
9615 case SAVEt_AELEM: /* array element */
9616 sv = (SV*)POPPTR(ss,ix);
9617 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9620 av = (AV*)POPPTR(ss,ix);
9621 TOPPTR(nss,ix) = av_dup_inc(av, param);
9623 case SAVEt_HELEM: /* hash element */
9624 sv = (SV*)POPPTR(ss,ix);
9625 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9626 sv = (SV*)POPPTR(ss,ix);
9627 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9628 hv = (HV*)POPPTR(ss,ix);
9629 TOPPTR(nss,ix) = hv_dup_inc(hv, param);
9632 ptr = POPPTR(ss,ix);
9633 TOPPTR(nss,ix) = ptr;
9640 av = (AV*)POPPTR(ss,ix);
9641 TOPPTR(nss,ix) = av_dup(av, param);
9644 longval = (long)POPLONG(ss,ix);
9645 TOPLONG(nss,ix) = longval;
9646 ptr = POPPTR(ss,ix);
9647 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9648 sv = (SV*)POPPTR(ss,ix);
9649 TOPPTR(nss,ix) = sv_dup(sv, param);
9652 Perl_croak(aTHX_ "panic: ss_dup inconsistency");
9660 =for apidoc perl_clone
9662 Create and return a new interpreter by cloning the current one.
9667 /* XXX the above needs expanding by someone who actually understands it ! */
9668 EXTERN_C PerlInterpreter *
9669 perl_clone_host(PerlInterpreter* proto_perl, UV flags);
9672 perl_clone(PerlInterpreter *proto_perl, UV flags)
9674 #ifdef PERL_IMPLICIT_SYS
9676 /* perlhost.h so we need to call into it
9677 to clone the host, CPerlHost should have a c interface, sky */
9679 if (flags & CLONEf_CLONE_HOST) {
9680 return perl_clone_host(proto_perl,flags);
9682 return perl_clone_using(proto_perl, flags,
9684 proto_perl->IMemShared,
9685 proto_perl->IMemParse,
9695 perl_clone_using(PerlInterpreter *proto_perl, UV flags,
9696 struct IPerlMem* ipM, struct IPerlMem* ipMS,
9697 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
9698 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
9699 struct IPerlDir* ipD, struct IPerlSock* ipS,
9700 struct IPerlProc* ipP)
9702 /* XXX many of the string copies here can be optimized if they're
9703 * constants; they need to be allocated as common memory and just
9704 * their pointers copied. */
9707 CLONE_PARAMS clone_params;
9708 CLONE_PARAMS* param = &clone_params;
9710 PerlInterpreter *my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
9711 PERL_SET_THX(my_perl);
9714 memset(my_perl, 0xab, sizeof(PerlInterpreter));
9720 Zero(&PL_debug_pad, 1, struct perl_debug_pad);
9721 # else /* !DEBUGGING */
9722 Zero(my_perl, 1, PerlInterpreter);
9723 # endif /* DEBUGGING */
9727 PL_MemShared = ipMS;
9735 #else /* !PERL_IMPLICIT_SYS */
9737 CLONE_PARAMS clone_params;
9738 CLONE_PARAMS* param = &clone_params;
9739 PerlInterpreter *my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
9740 PERL_SET_THX(my_perl);
9745 memset(my_perl, 0xab, sizeof(PerlInterpreter));
9751 Zero(&PL_debug_pad, 1, struct perl_debug_pad);
9752 # else /* !DEBUGGING */
9753 Zero(my_perl, 1, PerlInterpreter);
9754 # endif /* DEBUGGING */
9755 #endif /* PERL_IMPLICIT_SYS */
9756 param->flags = flags;
9759 PL_xiv_arenaroot = NULL;
9761 PL_xnv_arenaroot = NULL;
9763 PL_xrv_arenaroot = NULL;
9765 PL_xpv_arenaroot = NULL;
9767 PL_xpviv_arenaroot = NULL;
9768 PL_xpviv_root = NULL;
9769 PL_xpvnv_arenaroot = NULL;
9770 PL_xpvnv_root = NULL;
9771 PL_xpvcv_arenaroot = NULL;
9772 PL_xpvcv_root = NULL;
9773 PL_xpvav_arenaroot = NULL;
9774 PL_xpvav_root = NULL;
9775 PL_xpvhv_arenaroot = NULL;
9776 PL_xpvhv_root = NULL;
9777 PL_xpvmg_arenaroot = NULL;
9778 PL_xpvmg_root = NULL;
9779 PL_xpvlv_arenaroot = NULL;
9780 PL_xpvlv_root = NULL;
9781 PL_xpvbm_arenaroot = NULL;
9782 PL_xpvbm_root = NULL;
9783 PL_he_arenaroot = NULL;
9785 PL_nice_chunk = NULL;
9786 PL_nice_chunk_size = 0;
9789 PL_sv_root = Nullsv;
9790 PL_sv_arenaroot = Nullsv;
9792 PL_debug = proto_perl->Idebug;
9794 #ifdef USE_REENTRANT_API
9795 Perl_reentrant_init(aTHX);
9798 /* create SV map for pointer relocation */
9799 PL_ptr_table = ptr_table_new();
9801 /* initialize these special pointers as early as possible */
9802 SvANY(&PL_sv_undef) = NULL;
9803 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
9804 SvFLAGS(&PL_sv_undef) = SVf_READONLY|SVt_NULL;
9805 ptr_table_store(PL_ptr_table, &proto_perl->Isv_undef, &PL_sv_undef);
9807 SvANY(&PL_sv_no) = new_XPVNV();
9808 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
9809 SvFLAGS(&PL_sv_no) = SVp_NOK|SVf_NOK|SVp_POK|SVf_POK|SVf_READONLY|SVt_PVNV;
9810 SvPVX(&PL_sv_no) = SAVEPVN(PL_No, 0);
9811 SvCUR(&PL_sv_no) = 0;
9812 SvLEN(&PL_sv_no) = 1;
9813 SvNVX(&PL_sv_no) = 0;
9814 ptr_table_store(PL_ptr_table, &proto_perl->Isv_no, &PL_sv_no);
9816 SvANY(&PL_sv_yes) = new_XPVNV();
9817 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
9818 SvFLAGS(&PL_sv_yes) = SVp_NOK|SVf_NOK|SVp_POK|SVf_POK|SVf_READONLY|SVt_PVNV;
9819 SvPVX(&PL_sv_yes) = SAVEPVN(PL_Yes, 1);
9820 SvCUR(&PL_sv_yes) = 1;
9821 SvLEN(&PL_sv_yes) = 2;
9822 SvNVX(&PL_sv_yes) = 1;
9823 ptr_table_store(PL_ptr_table, &proto_perl->Isv_yes, &PL_sv_yes);
9825 /* create (a non-shared!) shared string table */
9826 PL_strtab = newHV();
9827 HvSHAREKEYS_off(PL_strtab);
9828 hv_ksplit(PL_strtab, 512);
9829 ptr_table_store(PL_ptr_table, proto_perl->Istrtab, PL_strtab);
9831 PL_compiling = proto_perl->Icompiling;
9833 /* These two PVs will be free'd special way so must set them same way op.c does */
9834 PL_compiling.cop_stashpv = savesharedpv(PL_compiling.cop_stashpv);
9835 ptr_table_store(PL_ptr_table, proto_perl->Icompiling.cop_stashpv, PL_compiling.cop_stashpv);
9837 PL_compiling.cop_file = savesharedpv(PL_compiling.cop_file);
9838 ptr_table_store(PL_ptr_table, proto_perl->Icompiling.cop_file, PL_compiling.cop_file);
9840 ptr_table_store(PL_ptr_table, &proto_perl->Icompiling, &PL_compiling);
9841 if (!specialWARN(PL_compiling.cop_warnings))
9842 PL_compiling.cop_warnings = sv_dup_inc(PL_compiling.cop_warnings, param);
9843 if (!specialCopIO(PL_compiling.cop_io))
9844 PL_compiling.cop_io = sv_dup_inc(PL_compiling.cop_io, param);
9845 PL_curcop = (COP*)any_dup(proto_perl->Tcurcop, proto_perl);
9847 /* pseudo environmental stuff */
9848 PL_origargc = proto_perl->Iorigargc;
9850 New(0, PL_origargv, i+1, char*);
9851 PL_origargv[i] = '\0';
9853 PL_origargv[i] = SAVEPV(proto_perl->Iorigargv[i]);
9856 param->stashes = newAV(); /* Setup array of objects to call clone on */
9858 #ifdef PERLIO_LAYERS
9859 /* Clone PerlIO tables as soon as we can handle general xx_dup() */
9860 PerlIO_clone(aTHX_ proto_perl, param);
9863 PL_envgv = gv_dup(proto_perl->Ienvgv, param);
9864 PL_incgv = gv_dup(proto_perl->Iincgv, param);
9865 PL_hintgv = gv_dup(proto_perl->Ihintgv, param);
9866 PL_origfilename = SAVEPV(proto_perl->Iorigfilename);
9867 PL_diehook = sv_dup_inc(proto_perl->Idiehook, param);
9868 PL_warnhook = sv_dup_inc(proto_perl->Iwarnhook, param);
9871 PL_minus_c = proto_perl->Iminus_c;
9872 PL_patchlevel = sv_dup_inc(proto_perl->Ipatchlevel, param);
9873 PL_localpatches = proto_perl->Ilocalpatches;
9874 PL_splitstr = proto_perl->Isplitstr;
9875 PL_preprocess = proto_perl->Ipreprocess;
9876 PL_minus_n = proto_perl->Iminus_n;
9877 PL_minus_p = proto_perl->Iminus_p;
9878 PL_minus_l = proto_perl->Iminus_l;
9879 PL_minus_a = proto_perl->Iminus_a;
9880 PL_minus_F = proto_perl->Iminus_F;
9881 PL_doswitches = proto_perl->Idoswitches;
9882 PL_dowarn = proto_perl->Idowarn;
9883 PL_doextract = proto_perl->Idoextract;
9884 PL_sawampersand = proto_perl->Isawampersand;
9885 PL_unsafe = proto_perl->Iunsafe;
9886 PL_inplace = SAVEPV(proto_perl->Iinplace);
9887 PL_e_script = sv_dup_inc(proto_perl->Ie_script, param);
9888 PL_perldb = proto_perl->Iperldb;
9889 PL_perl_destruct_level = proto_perl->Iperl_destruct_level;
9890 PL_exit_flags = proto_perl->Iexit_flags;
9892 /* magical thingies */
9893 /* XXX time(&PL_basetime) when asked for? */
9894 PL_basetime = proto_perl->Ibasetime;
9895 PL_formfeed = sv_dup(proto_perl->Iformfeed, param);
9897 PL_maxsysfd = proto_perl->Imaxsysfd;
9898 PL_multiline = proto_perl->Imultiline;
9899 PL_statusvalue = proto_perl->Istatusvalue;
9901 PL_statusvalue_vms = proto_perl->Istatusvalue_vms;
9903 PL_encoding = sv_dup(proto_perl->Iencoding, param);
9905 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
9906 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
9907 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
9909 /* Clone the regex array */
9910 PL_regex_padav = newAV();
9912 I32 len = av_len((AV*)proto_perl->Iregex_padav);
9913 SV** regexen = AvARRAY((AV*)proto_perl->Iregex_padav);
9914 av_push(PL_regex_padav,
9915 sv_dup_inc(regexen[0],param));
9916 for(i = 1; i <= len; i++) {
9917 if(SvREPADTMP(regexen[i])) {
9918 av_push(PL_regex_padav, sv_dup_inc(regexen[i], param));
9920 av_push(PL_regex_padav,
9922 newSViv(PTR2IV(re_dup(INT2PTR(REGEXP *,
9923 SvIVX(regexen[i])), param)))
9928 PL_regex_pad = AvARRAY(PL_regex_padav);
9930 /* shortcuts to various I/O objects */
9931 PL_stdingv = gv_dup(proto_perl->Istdingv, param);
9932 PL_stderrgv = gv_dup(proto_perl->Istderrgv, param);
9933 PL_defgv = gv_dup(proto_perl->Idefgv, param);
9934 PL_argvgv = gv_dup(proto_perl->Iargvgv, param);
9935 PL_argvoutgv = gv_dup(proto_perl->Iargvoutgv, param);
9936 PL_argvout_stack = av_dup_inc(proto_perl->Iargvout_stack, param);
9938 /* shortcuts to regexp stuff */
9939 PL_replgv = gv_dup(proto_perl->Ireplgv, param);
9941 /* shortcuts to misc objects */
9942 PL_errgv = gv_dup(proto_perl->Ierrgv, param);
9944 /* shortcuts to debugging objects */
9945 PL_DBgv = gv_dup(proto_perl->IDBgv, param);
9946 PL_DBline = gv_dup(proto_perl->IDBline, param);
9947 PL_DBsub = gv_dup(proto_perl->IDBsub, param);
9948 PL_DBsingle = sv_dup(proto_perl->IDBsingle, param);
9949 PL_DBtrace = sv_dup(proto_perl->IDBtrace, param);
9950 PL_DBsignal = sv_dup(proto_perl->IDBsignal, param);
9951 PL_lineary = av_dup(proto_perl->Ilineary, param);
9952 PL_dbargs = av_dup(proto_perl->Idbargs, param);
9955 PL_defstash = hv_dup_inc(proto_perl->Tdefstash, param);
9956 PL_curstash = hv_dup(proto_perl->Tcurstash, param);
9957 PL_nullstash = hv_dup(proto_perl->Inullstash, param);
9958 PL_debstash = hv_dup(proto_perl->Idebstash, param);
9959 PL_globalstash = hv_dup(proto_perl->Iglobalstash, param);
9960 PL_curstname = sv_dup_inc(proto_perl->Icurstname, param);
9962 PL_beginav = av_dup_inc(proto_perl->Ibeginav, param);
9963 PL_beginav_save = av_dup_inc(proto_perl->Ibeginav_save, param);
9964 PL_endav = av_dup_inc(proto_perl->Iendav, param);
9965 PL_checkav = av_dup_inc(proto_perl->Icheckav, param);
9966 PL_initav = av_dup_inc(proto_perl->Iinitav, param);
9968 PL_sub_generation = proto_perl->Isub_generation;
9970 /* funky return mechanisms */
9971 PL_forkprocess = proto_perl->Iforkprocess;
9973 /* subprocess state */
9974 PL_fdpid = av_dup_inc(proto_perl->Ifdpid, param);
9976 /* internal state */
9977 PL_tainting = proto_perl->Itainting;
9978 PL_maxo = proto_perl->Imaxo;
9979 if (proto_perl->Iop_mask)
9980 PL_op_mask = SAVEPVN(proto_perl->Iop_mask, PL_maxo);
9982 PL_op_mask = Nullch;
9984 /* current interpreter roots */
9985 PL_main_cv = cv_dup_inc(proto_perl->Imain_cv, param);
9986 PL_main_root = OpREFCNT_inc(proto_perl->Imain_root);
9987 PL_main_start = proto_perl->Imain_start;
9988 PL_eval_root = proto_perl->Ieval_root;
9989 PL_eval_start = proto_perl->Ieval_start;
9991 /* runtime control stuff */
9992 PL_curcopdb = (COP*)any_dup(proto_perl->Icurcopdb, proto_perl);
9993 PL_copline = proto_perl->Icopline;
9995 PL_filemode = proto_perl->Ifilemode;
9996 PL_lastfd = proto_perl->Ilastfd;
9997 PL_oldname = proto_perl->Ioldname; /* XXX not quite right */
10000 PL_gensym = proto_perl->Igensym;
10001 PL_preambled = proto_perl->Ipreambled;
10002 PL_preambleav = av_dup_inc(proto_perl->Ipreambleav, param);
10003 PL_laststatval = proto_perl->Ilaststatval;
10004 PL_laststype = proto_perl->Ilaststype;
10005 PL_mess_sv = Nullsv;
10007 PL_ors_sv = sv_dup_inc(proto_perl->Iors_sv, param);
10008 PL_ofmt = SAVEPV(proto_perl->Iofmt);
10010 /* interpreter atexit processing */
10011 PL_exitlistlen = proto_perl->Iexitlistlen;
10012 if (PL_exitlistlen) {
10013 New(0, PL_exitlist, PL_exitlistlen, PerlExitListEntry);
10014 Copy(proto_perl->Iexitlist, PL_exitlist, PL_exitlistlen, PerlExitListEntry);
10017 PL_exitlist = (PerlExitListEntry*)NULL;
10018 PL_modglobal = hv_dup_inc(proto_perl->Imodglobal, param);
10019 PL_custom_op_names = hv_dup_inc(proto_perl->Icustom_op_names,param);
10020 PL_custom_op_descs = hv_dup_inc(proto_perl->Icustom_op_descs,param);
10022 PL_profiledata = NULL;
10023 PL_rsfp = fp_dup(proto_perl->Irsfp, '<', param);
10024 /* PL_rsfp_filters entries have fake IoDIRP() */
10025 PL_rsfp_filters = av_dup_inc(proto_perl->Irsfp_filters, param);
10027 PL_compcv = cv_dup(proto_perl->Icompcv, param);
10028 PL_comppad = av_dup(proto_perl->Icomppad, param);
10029 PL_comppad_name = av_dup(proto_perl->Icomppad_name, param);
10030 PL_comppad_name_fill = proto_perl->Icomppad_name_fill;
10031 PL_comppad_name_floor = proto_perl->Icomppad_name_floor;
10032 PL_curpad = (SV**)ptr_table_fetch(PL_ptr_table,
10033 proto_perl->Tcurpad);
10035 #ifdef HAVE_INTERP_INTERN
10036 sys_intern_dup(&proto_perl->Isys_intern, &PL_sys_intern);
10039 /* more statics moved here */
10040 PL_generation = proto_perl->Igeneration;
10041 PL_DBcv = cv_dup(proto_perl->IDBcv, param);
10043 PL_in_clean_objs = proto_perl->Iin_clean_objs;
10044 PL_in_clean_all = proto_perl->Iin_clean_all;
10046 PL_uid = proto_perl->Iuid;
10047 PL_euid = proto_perl->Ieuid;
10048 PL_gid = proto_perl->Igid;
10049 PL_egid = proto_perl->Iegid;
10050 PL_nomemok = proto_perl->Inomemok;
10051 PL_an = proto_perl->Ian;
10052 PL_cop_seqmax = proto_perl->Icop_seqmax;
10053 PL_op_seqmax = proto_perl->Iop_seqmax;
10054 PL_evalseq = proto_perl->Ievalseq;
10055 PL_origenviron = proto_perl->Iorigenviron; /* XXX not quite right */
10056 PL_origalen = proto_perl->Iorigalen;
10057 PL_pidstatus = newHV(); /* XXX flag for cloning? */
10058 PL_osname = SAVEPV(proto_perl->Iosname);
10059 PL_sh_path = proto_perl->Ish_path; /* XXX never deallocated */
10060 PL_sighandlerp = proto_perl->Isighandlerp;
10063 PL_runops = proto_perl->Irunops;
10065 Copy(proto_perl->Itokenbuf, PL_tokenbuf, 256, char);
10068 PL_cshlen = proto_perl->Icshlen;
10069 PL_cshname = proto_perl->Icshname; /* XXX never deallocated */
10072 PL_lex_state = proto_perl->Ilex_state;
10073 PL_lex_defer = proto_perl->Ilex_defer;
10074 PL_lex_expect = proto_perl->Ilex_expect;
10075 PL_lex_formbrack = proto_perl->Ilex_formbrack;
10076 PL_lex_dojoin = proto_perl->Ilex_dojoin;
10077 PL_lex_starts = proto_perl->Ilex_starts;
10078 PL_lex_stuff = sv_dup_inc(proto_perl->Ilex_stuff, param);
10079 PL_lex_repl = sv_dup_inc(proto_perl->Ilex_repl, param);
10080 PL_lex_op = proto_perl->Ilex_op;
10081 PL_lex_inpat = proto_perl->Ilex_inpat;
10082 PL_lex_inwhat = proto_perl->Ilex_inwhat;
10083 PL_lex_brackets = proto_perl->Ilex_brackets;
10084 i = (PL_lex_brackets < 120 ? 120 : PL_lex_brackets);
10085 PL_lex_brackstack = SAVEPVN(proto_perl->Ilex_brackstack,i);
10086 PL_lex_casemods = proto_perl->Ilex_casemods;
10087 i = (PL_lex_casemods < 12 ? 12 : PL_lex_casemods);
10088 PL_lex_casestack = SAVEPVN(proto_perl->Ilex_casestack,i);
10090 Copy(proto_perl->Inextval, PL_nextval, 5, YYSTYPE);
10091 Copy(proto_perl->Inexttype, PL_nexttype, 5, I32);
10092 PL_nexttoke = proto_perl->Inexttoke;
10094 PL_linestr = sv_dup_inc(proto_perl->Ilinestr, param);
10095 i = proto_perl->Ibufptr - SvPVX(proto_perl->Ilinestr);
10096 PL_bufptr = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10097 i = proto_perl->Ioldbufptr - SvPVX(proto_perl->Ilinestr);
10098 PL_oldbufptr = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10099 i = proto_perl->Ioldoldbufptr - SvPVX(proto_perl->Ilinestr);
10100 PL_oldoldbufptr = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10101 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
10102 i = proto_perl->Ilinestart - SvPVX(proto_perl->Ilinestr);
10103 PL_linestart = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10104 PL_pending_ident = proto_perl->Ipending_ident;
10105 PL_sublex_info = proto_perl->Isublex_info; /* XXX not quite right */
10107 PL_expect = proto_perl->Iexpect;
10109 PL_multi_start = proto_perl->Imulti_start;
10110 PL_multi_end = proto_perl->Imulti_end;
10111 PL_multi_open = proto_perl->Imulti_open;
10112 PL_multi_close = proto_perl->Imulti_close;
10114 PL_error_count = proto_perl->Ierror_count;
10115 PL_subline = proto_perl->Isubline;
10116 PL_subname = sv_dup_inc(proto_perl->Isubname, param);
10118 PL_min_intro_pending = proto_perl->Imin_intro_pending;
10119 PL_max_intro_pending = proto_perl->Imax_intro_pending;
10120 PL_padix = proto_perl->Ipadix;
10121 PL_padix_floor = proto_perl->Ipadix_floor;
10122 PL_pad_reset_pending = proto_perl->Ipad_reset_pending;
10124 i = proto_perl->Ilast_uni - SvPVX(proto_perl->Ilinestr);
10125 PL_last_uni = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10126 i = proto_perl->Ilast_lop - SvPVX(proto_perl->Ilinestr);
10127 PL_last_lop = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10128 PL_last_lop_op = proto_perl->Ilast_lop_op;
10129 PL_in_my = proto_perl->Iin_my;
10130 PL_in_my_stash = hv_dup(proto_perl->Iin_my_stash, param);
10132 PL_cryptseen = proto_perl->Icryptseen;
10135 PL_hints = proto_perl->Ihints;
10137 PL_amagic_generation = proto_perl->Iamagic_generation;
10139 #ifdef USE_LOCALE_COLLATE
10140 PL_collation_ix = proto_perl->Icollation_ix;
10141 PL_collation_name = SAVEPV(proto_perl->Icollation_name);
10142 PL_collation_standard = proto_perl->Icollation_standard;
10143 PL_collxfrm_base = proto_perl->Icollxfrm_base;
10144 PL_collxfrm_mult = proto_perl->Icollxfrm_mult;
10145 #endif /* USE_LOCALE_COLLATE */
10147 #ifdef USE_LOCALE_NUMERIC
10148 PL_numeric_name = SAVEPV(proto_perl->Inumeric_name);
10149 PL_numeric_standard = proto_perl->Inumeric_standard;
10150 PL_numeric_local = proto_perl->Inumeric_local;
10151 PL_numeric_radix_sv = sv_dup_inc(proto_perl->Inumeric_radix_sv, param);
10152 #endif /* !USE_LOCALE_NUMERIC */
10154 /* utf8 character classes */
10155 PL_utf8_alnum = sv_dup_inc(proto_perl->Iutf8_alnum, param);
10156 PL_utf8_alnumc = sv_dup_inc(proto_perl->Iutf8_alnumc, param);
10157 PL_utf8_ascii = sv_dup_inc(proto_perl->Iutf8_ascii, param);
10158 PL_utf8_alpha = sv_dup_inc(proto_perl->Iutf8_alpha, param);
10159 PL_utf8_space = sv_dup_inc(proto_perl->Iutf8_space, param);
10160 PL_utf8_cntrl = sv_dup_inc(proto_perl->Iutf8_cntrl, param);
10161 PL_utf8_graph = sv_dup_inc(proto_perl->Iutf8_graph, param);
10162 PL_utf8_digit = sv_dup_inc(proto_perl->Iutf8_digit, param);
10163 PL_utf8_upper = sv_dup_inc(proto_perl->Iutf8_upper, param);
10164 PL_utf8_lower = sv_dup_inc(proto_perl->Iutf8_lower, param);
10165 PL_utf8_print = sv_dup_inc(proto_perl->Iutf8_print, param);
10166 PL_utf8_punct = sv_dup_inc(proto_perl->Iutf8_punct, param);
10167 PL_utf8_xdigit = sv_dup_inc(proto_perl->Iutf8_xdigit, param);
10168 PL_utf8_mark = sv_dup_inc(proto_perl->Iutf8_mark, param);
10169 PL_utf8_toupper = sv_dup_inc(proto_perl->Iutf8_toupper, param);
10170 PL_utf8_totitle = sv_dup_inc(proto_perl->Iutf8_totitle, param);
10171 PL_utf8_tolower = sv_dup_inc(proto_perl->Iutf8_tolower, param);
10172 PL_utf8_tofold = sv_dup_inc(proto_perl->Iutf8_tofold, param);
10173 PL_utf8_idstart = sv_dup_inc(proto_perl->Iutf8_idstart, param);
10174 PL_utf8_idcont = sv_dup_inc(proto_perl->Iutf8_idcont, param);
10177 PL_last_swash_hv = Nullhv; /* reinits on demand */
10178 PL_last_swash_klen = 0;
10179 PL_last_swash_key[0]= '\0';
10180 PL_last_swash_tmps = (U8*)NULL;
10181 PL_last_swash_slen = 0;
10183 /* perly.c globals */
10184 PL_yydebug = proto_perl->Iyydebug;
10185 PL_yynerrs = proto_perl->Iyynerrs;
10186 PL_yyerrflag = proto_perl->Iyyerrflag;
10187 PL_yychar = proto_perl->Iyychar;
10188 PL_yyval = proto_perl->Iyyval;
10189 PL_yylval = proto_perl->Iyylval;
10191 PL_glob_index = proto_perl->Iglob_index;
10192 PL_srand_called = proto_perl->Isrand_called;
10193 PL_uudmap['M'] = 0; /* reinits on demand */
10194 PL_bitcount = Nullch; /* reinits on demand */
10196 if (proto_perl->Ipsig_pend) {
10197 Newz(0, PL_psig_pend, SIG_SIZE, int);
10200 PL_psig_pend = (int*)NULL;
10203 if (proto_perl->Ipsig_ptr) {
10204 Newz(0, PL_psig_ptr, SIG_SIZE, SV*);
10205 Newz(0, PL_psig_name, SIG_SIZE, SV*);
10206 for (i = 1; i < SIG_SIZE; i++) {
10207 PL_psig_ptr[i] = sv_dup_inc(proto_perl->Ipsig_ptr[i], param);
10208 PL_psig_name[i] = sv_dup_inc(proto_perl->Ipsig_name[i], param);
10212 PL_psig_ptr = (SV**)NULL;
10213 PL_psig_name = (SV**)NULL;
10216 /* thrdvar.h stuff */
10218 if (flags & CLONEf_COPY_STACKS) {
10219 /* next allocation will be PL_tmps_stack[PL_tmps_ix+1] */
10220 PL_tmps_ix = proto_perl->Ttmps_ix;
10221 PL_tmps_max = proto_perl->Ttmps_max;
10222 PL_tmps_floor = proto_perl->Ttmps_floor;
10223 Newz(50, PL_tmps_stack, PL_tmps_max, SV*);
10225 while (i <= PL_tmps_ix) {
10226 PL_tmps_stack[i] = sv_dup_inc(proto_perl->Ttmps_stack[i], param);
10230 /* next PUSHMARK() sets *(PL_markstack_ptr+1) */
10231 i = proto_perl->Tmarkstack_max - proto_perl->Tmarkstack;
10232 Newz(54, PL_markstack, i, I32);
10233 PL_markstack_max = PL_markstack + (proto_perl->Tmarkstack_max
10234 - proto_perl->Tmarkstack);
10235 PL_markstack_ptr = PL_markstack + (proto_perl->Tmarkstack_ptr
10236 - proto_perl->Tmarkstack);
10237 Copy(proto_perl->Tmarkstack, PL_markstack,
10238 PL_markstack_ptr - PL_markstack + 1, I32);
10240 /* next push_scope()/ENTER sets PL_scopestack[PL_scopestack_ix]
10241 * NOTE: unlike the others! */
10242 PL_scopestack_ix = proto_perl->Tscopestack_ix;
10243 PL_scopestack_max = proto_perl->Tscopestack_max;
10244 Newz(54, PL_scopestack, PL_scopestack_max, I32);
10245 Copy(proto_perl->Tscopestack, PL_scopestack, PL_scopestack_ix, I32);
10247 /* next push_return() sets PL_retstack[PL_retstack_ix]
10248 * NOTE: unlike the others! */
10249 PL_retstack_ix = proto_perl->Tretstack_ix;
10250 PL_retstack_max = proto_perl->Tretstack_max;
10251 Newz(54, PL_retstack, PL_retstack_max, OP*);
10252 Copy(proto_perl->Tretstack, PL_retstack, PL_retstack_ix, OP*);
10254 /* NOTE: si_dup() looks at PL_markstack */
10255 PL_curstackinfo = si_dup(proto_perl->Tcurstackinfo, param);
10257 /* PL_curstack = PL_curstackinfo->si_stack; */
10258 PL_curstack = av_dup(proto_perl->Tcurstack, param);
10259 PL_mainstack = av_dup(proto_perl->Tmainstack, param);
10261 /* next PUSHs() etc. set *(PL_stack_sp+1) */
10262 PL_stack_base = AvARRAY(PL_curstack);
10263 PL_stack_sp = PL_stack_base + (proto_perl->Tstack_sp
10264 - proto_perl->Tstack_base);
10265 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
10267 /* next SSPUSHFOO() sets PL_savestack[PL_savestack_ix]
10268 * NOTE: unlike the others! */
10269 PL_savestack_ix = proto_perl->Tsavestack_ix;
10270 PL_savestack_max = proto_perl->Tsavestack_max;
10271 /*Newz(54, PL_savestack, PL_savestack_max, ANY);*/
10272 PL_savestack = ss_dup(proto_perl, param);
10276 ENTER; /* perl_destruct() wants to LEAVE; */
10279 PL_start_env = proto_perl->Tstart_env; /* XXXXXX */
10280 PL_top_env = &PL_start_env;
10282 PL_op = proto_perl->Top;
10285 PL_Xpv = (XPV*)NULL;
10286 PL_na = proto_perl->Tna;
10288 PL_statbuf = proto_perl->Tstatbuf;
10289 PL_statcache = proto_perl->Tstatcache;
10290 PL_statgv = gv_dup(proto_perl->Tstatgv, param);
10291 PL_statname = sv_dup_inc(proto_perl->Tstatname, param);
10293 PL_timesbuf = proto_perl->Ttimesbuf;
10296 PL_tainted = proto_perl->Ttainted;
10297 PL_curpm = proto_perl->Tcurpm; /* XXX No PMOP ref count */
10298 PL_rs = sv_dup_inc(proto_perl->Trs, param);
10299 PL_last_in_gv = gv_dup(proto_perl->Tlast_in_gv, param);
10300 PL_ofs_sv = sv_dup_inc(proto_perl->Tofs_sv, param);
10301 PL_defoutgv = gv_dup_inc(proto_perl->Tdefoutgv, param);
10302 PL_chopset = proto_perl->Tchopset; /* XXX never deallocated */
10303 PL_toptarget = sv_dup_inc(proto_perl->Ttoptarget, param);
10304 PL_bodytarget = sv_dup_inc(proto_perl->Tbodytarget, param);
10305 PL_formtarget = sv_dup(proto_perl->Tformtarget, param);
10307 PL_restartop = proto_perl->Trestartop;
10308 PL_in_eval = proto_perl->Tin_eval;
10309 PL_delaymagic = proto_perl->Tdelaymagic;
10310 PL_dirty = proto_perl->Tdirty;
10311 PL_localizing = proto_perl->Tlocalizing;
10313 #ifdef PERL_FLEXIBLE_EXCEPTIONS
10314 PL_protect = proto_perl->Tprotect;
10316 PL_errors = sv_dup_inc(proto_perl->Terrors, param);
10317 PL_av_fetch_sv = Nullsv;
10318 PL_hv_fetch_sv = Nullsv;
10319 Zero(&PL_hv_fetch_ent_mh, 1, HE); /* XXX */
10320 PL_modcount = proto_perl->Tmodcount;
10321 PL_lastgotoprobe = Nullop;
10322 PL_dumpindent = proto_perl->Tdumpindent;
10324 PL_sortcop = (OP*)any_dup(proto_perl->Tsortcop, proto_perl);
10325 PL_sortstash = hv_dup(proto_perl->Tsortstash, param);
10326 PL_firstgv = gv_dup(proto_perl->Tfirstgv, param);
10327 PL_secondgv = gv_dup(proto_perl->Tsecondgv, param);
10328 PL_sortcxix = proto_perl->Tsortcxix;
10329 PL_efloatbuf = Nullch; /* reinits on demand */
10330 PL_efloatsize = 0; /* reinits on demand */
10334 PL_screamfirst = NULL;
10335 PL_screamnext = NULL;
10336 PL_maxscream = -1; /* reinits on demand */
10337 PL_lastscream = Nullsv;
10339 PL_watchaddr = NULL;
10340 PL_watchok = Nullch;
10342 PL_regdummy = proto_perl->Tregdummy;
10343 PL_regcomp_parse = Nullch;
10344 PL_regxend = Nullch;
10345 PL_regcode = (regnode*)NULL;
10348 PL_regprecomp = Nullch;
10353 PL_seen_zerolen = 0;
10355 PL_regcomp_rx = (regexp*)NULL;
10357 PL_colorset = 0; /* reinits PL_colors[] */
10358 /*PL_colors[6] = {0,0,0,0,0,0};*/
10359 PL_reg_whilem_seen = 0;
10360 PL_reginput = Nullch;
10361 PL_regbol = Nullch;
10362 PL_regeol = Nullch;
10363 PL_regstartp = (I32*)NULL;
10364 PL_regendp = (I32*)NULL;
10365 PL_reglastparen = (U32*)NULL;
10366 PL_regtill = Nullch;
10367 PL_reg_start_tmp = (char**)NULL;
10368 PL_reg_start_tmpl = 0;
10369 PL_regdata = (struct reg_data*)NULL;
10372 PL_reg_eval_set = 0;
10374 PL_regprogram = (regnode*)NULL;
10376 PL_regcc = (CURCUR*)NULL;
10377 PL_reg_call_cc = (struct re_cc_state*)NULL;
10378 PL_reg_re = (regexp*)NULL;
10379 PL_reg_ganch = Nullch;
10380 PL_reg_sv = Nullsv;
10381 PL_reg_match_utf8 = FALSE;
10382 PL_reg_magic = (MAGIC*)NULL;
10384 PL_reg_oldcurpm = (PMOP*)NULL;
10385 PL_reg_curpm = (PMOP*)NULL;
10386 PL_reg_oldsaved = Nullch;
10387 PL_reg_oldsavedlen = 0;
10388 PL_reg_maxiter = 0;
10389 PL_reg_leftiter = 0;
10390 PL_reg_poscache = Nullch;
10391 PL_reg_poscache_size= 0;
10393 /* RE engine - function pointers */
10394 PL_regcompp = proto_perl->Tregcompp;
10395 PL_regexecp = proto_perl->Tregexecp;
10396 PL_regint_start = proto_perl->Tregint_start;
10397 PL_regint_string = proto_perl->Tregint_string;
10398 PL_regfree = proto_perl->Tregfree;
10400 PL_reginterp_cnt = 0;
10401 PL_reg_starttry = 0;
10403 /* Pluggable optimizer */
10404 PL_peepp = proto_perl->Tpeepp;
10406 if (!(flags & CLONEf_KEEP_PTR_TABLE)) {
10407 ptr_table_free(PL_ptr_table);
10408 PL_ptr_table = NULL;
10411 /* Call the ->CLONE method, if it exists, for each of the stashes
10412 identified by sv_dup() above.
10414 while(av_len(param->stashes) != -1) {
10415 HV* stash = (HV*) av_shift(param->stashes);
10416 GV* cloner = gv_fetchmethod_autoload(stash, "CLONE", 0);
10417 if (cloner && GvCV(cloner)) {
10422 XPUSHs(sv_2mortal(newSVpv(HvNAME(stash), 0)));
10424 call_sv((SV*)GvCV(cloner), G_DISCARD);
10430 SvREFCNT_dec(param->stashes);
10435 #endif /* USE_ITHREADS */
10438 =head1 Unicode Support
10440 =for apidoc sv_recode_to_utf8
10442 The encoding is assumed to be an Encode object, on entry the PV
10443 of the sv is assumed to be octets in that encoding, and the sv
10444 will be converted into Unicode (and UTF-8).
10446 If the sv already is UTF-8 (or if it is not POK), or if the encoding
10447 is not a reference, nothing is done to the sv. If the encoding is not
10448 an C<Encode::XS> Encoding object, bad things will happen.
10449 (See F<lib/encoding.pm> and L<Encode>).
10451 The PV of the sv is returned.
10456 Perl_sv_recode_to_utf8(pTHX_ SV *sv, SV *encoding)
10458 if (SvPOK(sv) && !DO_UTF8(sv) && SvROK(encoding)) {
10469 XPUSHs(&PL_sv_yes);
10471 call_method("decode", G_SCALAR);
10475 s = SvPV(uni, len);
10476 if (s != SvPVX(sv)) {
10477 SvGROW(sv, len + 1);
10478 Move(s, SvPVX(sv), len, char);
10479 SvCUR_set(sv, len);
10480 SvPVX(sv)[len] = 0;