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)
3195 SV *tmpsv = sv_newmortal();
3197 if ( SvTHINKFIRST(ssv) && SvROK(ssv) && SvAMAGIC(ssv) ) {
3198 tmpsv = AMG_CALLun(ssv,string);
3199 if (SvTYPE(tmpsv) != SVt_RV || (SvRV(tmpsv) != SvRV(ssv))) {
3208 sv_setpvn(tmpsv,s,len);
3218 =for apidoc sv_2pvbyte_nolen
3220 Return a pointer to the byte-encoded representation of the SV.
3221 May cause the SV to be downgraded from UTF8 as a side-effect.
3223 Usually accessed via the C<SvPVbyte_nolen> macro.
3229 Perl_sv_2pvbyte_nolen(pTHX_ register SV *sv)
3232 return sv_2pvbyte(sv, &n_a);
3236 =for apidoc sv_2pvbyte
3238 Return a pointer to the byte-encoded representation of the SV, and set *lp
3239 to its length. May cause the SV to be downgraded from UTF8 as a
3242 Usually accessed via the C<SvPVbyte> macro.
3248 Perl_sv_2pvbyte(pTHX_ register SV *sv, STRLEN *lp)
3250 sv_utf8_downgrade(sv,0);
3251 return SvPV(sv,*lp);
3255 =for apidoc sv_2pvutf8_nolen
3257 Return a pointer to the UTF8-encoded representation of the SV.
3258 May cause the SV to be upgraded to UTF8 as a side-effect.
3260 Usually accessed via the C<SvPVutf8_nolen> macro.
3266 Perl_sv_2pvutf8_nolen(pTHX_ register SV *sv)
3269 return sv_2pvutf8(sv, &n_a);
3273 =for apidoc sv_2pvutf8
3275 Return a pointer to the UTF8-encoded representation of the SV, and set *lp
3276 to its length. May cause the SV to be upgraded to UTF8 as a side-effect.
3278 Usually accessed via the C<SvPVutf8> macro.
3284 Perl_sv_2pvutf8(pTHX_ register SV *sv, STRLEN *lp)
3286 sv_utf8_upgrade(sv);
3287 return SvPV(sv,*lp);
3291 =for apidoc sv_2bool
3293 This function is only called on magical items, and is only used by
3294 sv_true() or its macro equivalent.
3300 Perl_sv_2bool(pTHX_ register SV *sv)
3309 if (SvAMAGIC(sv) && (tmpsv=AMG_CALLun(sv,bool_)) &&
3310 (!SvROK(tmpsv) || (SvRV(tmpsv) != SvRV(sv))))
3311 return (bool)SvTRUE(tmpsv);
3312 return SvRV(sv) != 0;
3315 register XPV* Xpvtmp;
3316 if ((Xpvtmp = (XPV*)SvANY(sv)) &&
3317 (*Xpvtmp->xpv_pv > '0' ||
3318 Xpvtmp->xpv_cur > 1 ||
3319 (Xpvtmp->xpv_cur && *Xpvtmp->xpv_pv != '0')))
3326 return SvIVX(sv) != 0;
3329 return SvNVX(sv) != 0.0;
3337 =for apidoc sv_utf8_upgrade
3339 Convert the PV of an SV to its UTF8-encoded form.
3340 Forces the SV to string form if it is not already.
3341 Always sets the SvUTF8 flag to avoid future validity checks even
3342 if all the bytes have hibit clear.
3344 This is not as a general purpose byte encoding to Unicode interface:
3345 use the Encode extension for that.
3347 =for apidoc sv_utf8_upgrade_flags
3349 Convert the PV of an SV to its UTF8-encoded form.
3350 Forces the SV to string form if it is not already.
3351 Always sets the SvUTF8 flag to avoid future validity checks even
3352 if all the bytes have hibit clear. If C<flags> has C<SV_GMAGIC> bit set,
3353 will C<mg_get> on C<sv> if appropriate, else not. C<sv_utf8_upgrade> and
3354 C<sv_utf8_upgrade_nomg> are implemented in terms of this function.
3356 This is not as a general purpose byte encoding to Unicode interface:
3357 use the Encode extension for that.
3363 Perl_sv_utf8_upgrade_flags(pTHX_ register SV *sv, I32 flags)
3373 (void) sv_2pv_flags(sv,&len, flags);
3381 if (SvREADONLY(sv) && SvFAKE(sv)) {
3382 sv_force_normal(sv);
3386 sv_recode_to_utf8(sv, PL_encoding);
3387 else { /* Assume Latin-1/EBCDIC */
3388 /* This function could be much more efficient if we
3389 * had a FLAG in SVs to signal if there are any hibit
3390 * chars in the PV. Given that there isn't such a flag
3391 * make the loop as fast as possible. */
3392 s = (U8 *) SvPVX(sv);
3393 e = (U8 *) SvEND(sv);
3397 if ((hibit = !NATIVE_IS_INVARIANT(ch)))
3403 len = SvCUR(sv) + 1; /* Plus the \0 */
3404 SvPVX(sv) = (char*)bytes_to_utf8((U8*)s, &len);
3405 SvCUR(sv) = len - 1;
3407 Safefree(s); /* No longer using what was there before. */
3408 SvLEN(sv) = len; /* No longer know the real size. */
3410 /* Mark as UTF-8 even if no hibit - saves scanning loop */
3417 =for apidoc sv_utf8_downgrade
3419 Attempt to convert the PV of an SV from UTF8-encoded to byte encoding.
3420 This may not be possible if the PV contains non-byte encoding characters;
3421 if this is the case, either returns false or, if C<fail_ok> is not
3424 This is not as a general purpose Unicode to byte encoding interface:
3425 use the Encode extension for that.
3431 Perl_sv_utf8_downgrade(pTHX_ register SV* sv, bool fail_ok)
3433 if (SvPOK(sv) && SvUTF8(sv)) {
3438 if (SvREADONLY(sv) && SvFAKE(sv))
3439 sv_force_normal(sv);
3440 s = (U8 *) SvPV(sv, len);
3441 if (!utf8_to_bytes(s, &len)) {
3446 Perl_croak(aTHX_ "Wide character in %s",
3449 Perl_croak(aTHX_ "Wide character");
3460 =for apidoc sv_utf8_encode
3462 Convert the PV of an SV to UTF8-encoded, but then turn off the C<SvUTF8>
3463 flag so that it looks like octets again. Used as a building block
3464 for encode_utf8 in Encode.xs
3470 Perl_sv_utf8_encode(pTHX_ register SV *sv)
3472 (void) sv_utf8_upgrade(sv);
3477 =for apidoc sv_utf8_decode
3479 Convert the octets in the PV from UTF-8 to chars. Scan for validity and then
3480 turn off SvUTF8 if needed so that we see characters. Used as a building block
3481 for decode_utf8 in Encode.xs
3487 Perl_sv_utf8_decode(pTHX_ register SV *sv)
3493 /* The octets may have got themselves encoded - get them back as
3496 if (!sv_utf8_downgrade(sv, TRUE))
3499 /* it is actually just a matter of turning the utf8 flag on, but
3500 * we want to make sure everything inside is valid utf8 first.
3502 c = (U8 *) SvPVX(sv);
3503 if (!is_utf8_string(c, SvCUR(sv)+1))
3505 e = (U8 *) SvEND(sv);
3508 if (!UTF8_IS_INVARIANT(ch)) {
3518 =for apidoc sv_setsv
3520 Copies the contents of the source SV C<ssv> into the destination SV
3521 C<dsv>. The source SV may be destroyed if it is mortal, so don't use this
3522 function if the source SV needs to be reused. Does not handle 'set' magic.
3523 Loosely speaking, it performs a copy-by-value, obliterating any previous
3524 content of the destination.
3526 You probably want to use one of the assortment of wrappers, such as
3527 C<SvSetSV>, C<SvSetSV_nosteal>, C<SvSetMagicSV> and
3528 C<SvSetMagicSV_nosteal>.
3530 =for apidoc sv_setsv_flags
3532 Copies the contents of the source SV C<ssv> into the destination SV
3533 C<dsv>. The source SV may be destroyed if it is mortal, so don't use this
3534 function if the source SV needs to be reused. Does not handle 'set' magic.
3535 Loosely speaking, it performs a copy-by-value, obliterating any previous
3536 content of the destination.
3537 If the C<flags> parameter has the C<SV_GMAGIC> bit set, will C<mg_get> on
3538 C<ssv> if appropriate, else not. C<sv_setsv> and C<sv_setsv_nomg> are
3539 implemented in terms of this function.
3541 You probably want to use one of the assortment of wrappers, such as
3542 C<SvSetSV>, C<SvSetSV_nosteal>, C<SvSetMagicSV> and
3543 C<SvSetMagicSV_nosteal>.
3545 This is the primary function for copying scalars, and most other
3546 copy-ish functions and macros use this underneath.
3552 Perl_sv_setsv_flags(pTHX_ SV *dstr, register SV *sstr, I32 flags)
3554 register U32 sflags;
3560 SV_CHECK_THINKFIRST(dstr);
3562 sstr = &PL_sv_undef;
3563 stype = SvTYPE(sstr);
3564 dtype = SvTYPE(dstr);
3568 /* There's a lot of redundancy below but we're going for speed here */
3573 if (dtype != SVt_PVGV) {
3574 (void)SvOK_off(dstr);
3582 sv_upgrade(dstr, SVt_IV);
3585 sv_upgrade(dstr, SVt_PVNV);
3589 sv_upgrade(dstr, SVt_PVIV);
3592 (void)SvIOK_only(dstr);
3593 SvIVX(dstr) = SvIVX(sstr);
3596 if (SvTAINTED(sstr))
3607 sv_upgrade(dstr, SVt_NV);
3612 sv_upgrade(dstr, SVt_PVNV);
3615 SvNVX(dstr) = SvNVX(sstr);
3616 (void)SvNOK_only(dstr);
3617 if (SvTAINTED(sstr))
3625 sv_upgrade(dstr, SVt_RV);
3626 else if (dtype == SVt_PVGV &&
3627 SvTYPE(SvRV(sstr)) == SVt_PVGV) {
3630 if (GvIMPORTED(dstr) != GVf_IMPORTED
3631 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3633 GvIMPORTED_on(dstr);
3644 sv_upgrade(dstr, SVt_PV);
3647 if (dtype < SVt_PVIV)
3648 sv_upgrade(dstr, SVt_PVIV);
3651 if (dtype < SVt_PVNV)
3652 sv_upgrade(dstr, SVt_PVNV);
3659 Perl_croak(aTHX_ "Bizarre copy of %s in %s", sv_reftype(sstr, 0),
3662 Perl_croak(aTHX_ "Bizarre copy of %s", sv_reftype(sstr, 0));
3666 if (dtype <= SVt_PVGV) {
3668 if (dtype != SVt_PVGV) {
3669 char *name = GvNAME(sstr);
3670 STRLEN len = GvNAMELEN(sstr);
3671 sv_upgrade(dstr, SVt_PVGV);
3672 sv_magic(dstr, dstr, PERL_MAGIC_glob, Nullch, 0);
3673 GvSTASH(dstr) = (HV*)SvREFCNT_inc(GvSTASH(sstr));
3674 GvNAME(dstr) = savepvn(name, len);
3675 GvNAMELEN(dstr) = len;
3676 SvFAKE_on(dstr); /* can coerce to non-glob */
3678 /* ahem, death to those who redefine active sort subs */
3679 else if (PL_curstackinfo->si_type == PERLSI_SORT
3680 && GvCV(dstr) && PL_sortcop == CvSTART(GvCV(dstr)))
3681 Perl_croak(aTHX_ "Can't redefine active sort subroutine %s",
3684 #ifdef GV_UNIQUE_CHECK
3685 if (GvUNIQUE((GV*)dstr)) {
3686 Perl_croak(aTHX_ PL_no_modify);
3690 (void)SvOK_off(dstr);
3691 GvINTRO_off(dstr); /* one-shot flag */
3693 GvGP(dstr) = gp_ref(GvGP(sstr));
3694 if (SvTAINTED(sstr))
3696 if (GvIMPORTED(dstr) != GVf_IMPORTED
3697 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3699 GvIMPORTED_on(dstr);
3707 if (SvGMAGICAL(sstr) && (flags & SV_GMAGIC)) {
3709 if ((int)SvTYPE(sstr) != stype) {
3710 stype = SvTYPE(sstr);
3711 if (stype == SVt_PVGV && dtype <= SVt_PVGV)
3715 if (stype == SVt_PVLV)
3716 (void)SvUPGRADE(dstr, SVt_PVNV);
3718 (void)SvUPGRADE(dstr, (U32)stype);
3721 sflags = SvFLAGS(sstr);
3723 if (sflags & SVf_ROK) {
3724 if (dtype >= SVt_PV) {
3725 if (dtype == SVt_PVGV) {
3726 SV *sref = SvREFCNT_inc(SvRV(sstr));
3728 int intro = GvINTRO(dstr);
3730 #ifdef GV_UNIQUE_CHECK
3731 if (GvUNIQUE((GV*)dstr)) {
3732 Perl_croak(aTHX_ PL_no_modify);
3737 GvINTRO_off(dstr); /* one-shot flag */
3738 GvLINE(dstr) = CopLINE(PL_curcop);
3739 GvEGV(dstr) = (GV*)dstr;
3742 switch (SvTYPE(sref)) {
3745 SAVESPTR(GvAV(dstr));
3747 dref = (SV*)GvAV(dstr);
3748 GvAV(dstr) = (AV*)sref;
3749 if (!GvIMPORTED_AV(dstr)
3750 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3752 GvIMPORTED_AV_on(dstr);
3757 SAVESPTR(GvHV(dstr));
3759 dref = (SV*)GvHV(dstr);
3760 GvHV(dstr) = (HV*)sref;
3761 if (!GvIMPORTED_HV(dstr)
3762 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3764 GvIMPORTED_HV_on(dstr);
3769 if (GvCVGEN(dstr) && GvCV(dstr) != (CV*)sref) {
3770 SvREFCNT_dec(GvCV(dstr));
3771 GvCV(dstr) = Nullcv;
3772 GvCVGEN(dstr) = 0; /* Switch off cacheness. */
3773 PL_sub_generation++;
3775 SAVESPTR(GvCV(dstr));
3778 dref = (SV*)GvCV(dstr);
3779 if (GvCV(dstr) != (CV*)sref) {
3780 CV* cv = GvCV(dstr);
3782 if (!GvCVGEN((GV*)dstr) &&
3783 (CvROOT(cv) || CvXSUB(cv)))
3785 /* ahem, death to those who redefine
3786 * active sort subs */
3787 if (PL_curstackinfo->si_type == PERLSI_SORT &&
3788 PL_sortcop == CvSTART(cv))
3790 "Can't redefine active sort subroutine %s",
3791 GvENAME((GV*)dstr));
3792 /* Redefining a sub - warning is mandatory if
3793 it was a const and its value changed. */
3794 if (ckWARN(WARN_REDEFINE)
3796 && (!CvCONST((CV*)sref)
3797 || sv_cmp(cv_const_sv(cv),
3798 cv_const_sv((CV*)sref)))))
3800 Perl_warner(aTHX_ packWARN(WARN_REDEFINE),
3802 ? "Constant subroutine %s::%s redefined"
3803 : "Subroutine %s::%s redefined",
3804 HvNAME(GvSTASH((GV*)dstr)),
3805 GvENAME((GV*)dstr));
3809 cv_ckproto(cv, (GV*)dstr,
3810 SvPOK(sref) ? SvPVX(sref) : Nullch);
3812 GvCV(dstr) = (CV*)sref;
3813 GvCVGEN(dstr) = 0; /* Switch off cacheness. */
3814 GvASSUMECV_on(dstr);
3815 PL_sub_generation++;
3817 if (!GvIMPORTED_CV(dstr)
3818 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3820 GvIMPORTED_CV_on(dstr);
3825 SAVESPTR(GvIOp(dstr));
3827 dref = (SV*)GvIOp(dstr);
3828 GvIOp(dstr) = (IO*)sref;
3832 SAVESPTR(GvFORM(dstr));
3834 dref = (SV*)GvFORM(dstr);
3835 GvFORM(dstr) = (CV*)sref;
3839 SAVESPTR(GvSV(dstr));
3841 dref = (SV*)GvSV(dstr);
3843 if (!GvIMPORTED_SV(dstr)
3844 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3846 GvIMPORTED_SV_on(dstr);
3854 if (SvTAINTED(sstr))
3859 (void)SvOOK_off(dstr); /* backoff */
3861 Safefree(SvPVX(dstr));
3862 SvLEN(dstr)=SvCUR(dstr)=0;
3865 (void)SvOK_off(dstr);
3866 SvRV(dstr) = SvREFCNT_inc(SvRV(sstr));
3868 if (sflags & SVp_NOK) {
3870 /* Only set the public OK flag if the source has public OK. */
3871 if (sflags & SVf_NOK)
3872 SvFLAGS(dstr) |= SVf_NOK;
3873 SvNVX(dstr) = SvNVX(sstr);
3875 if (sflags & SVp_IOK) {
3876 (void)SvIOKp_on(dstr);
3877 if (sflags & SVf_IOK)
3878 SvFLAGS(dstr) |= SVf_IOK;
3879 if (sflags & SVf_IVisUV)
3881 SvIVX(dstr) = SvIVX(sstr);
3883 if (SvAMAGIC(sstr)) {
3887 else if (sflags & SVp_POK) {
3890 * Check to see if we can just swipe the string. If so, it's a
3891 * possible small lose on short strings, but a big win on long ones.
3892 * It might even be a win on short strings if SvPVX(dstr)
3893 * has to be allocated and SvPVX(sstr) has to be freed.
3896 if (SvTEMP(sstr) && /* slated for free anyway? */
3897 SvREFCNT(sstr) == 1 && /* and no other references to it? */
3898 !(sflags & SVf_OOK) && /* and not involved in OOK hack? */
3899 SvLEN(sstr) && /* and really is a string */
3900 /* and won't be needed again, potentially */
3901 !(PL_op && PL_op->op_type == OP_AASSIGN))
3903 if (SvPVX(dstr)) { /* we know that dtype >= SVt_PV */
3905 SvFLAGS(dstr) &= ~SVf_OOK;
3906 Safefree(SvPVX(dstr) - SvIVX(dstr));
3908 else if (SvLEN(dstr))
3909 Safefree(SvPVX(dstr));
3911 (void)SvPOK_only(dstr);
3912 SvPV_set(dstr, SvPVX(sstr));
3913 SvLEN_set(dstr, SvLEN(sstr));
3914 SvCUR_set(dstr, SvCUR(sstr));
3917 (void)SvOK_off(sstr); /* NOTE: nukes most SvFLAGS on sstr */
3918 SvPV_set(sstr, Nullch);
3923 else { /* have to copy actual string */
3924 STRLEN len = SvCUR(sstr);
3925 SvGROW(dstr, len + 1); /* inlined from sv_setpvn */
3926 Move(SvPVX(sstr),SvPVX(dstr),len,char);
3927 SvCUR_set(dstr, len);
3928 *SvEND(dstr) = '\0';
3929 (void)SvPOK_only(dstr);
3931 if (sflags & SVf_UTF8)
3934 if (sflags & SVp_NOK) {
3936 if (sflags & SVf_NOK)
3937 SvFLAGS(dstr) |= SVf_NOK;
3938 SvNVX(dstr) = SvNVX(sstr);
3940 if (sflags & SVp_IOK) {
3941 (void)SvIOKp_on(dstr);
3942 if (sflags & SVf_IOK)
3943 SvFLAGS(dstr) |= SVf_IOK;
3944 if (sflags & SVf_IVisUV)
3946 SvIVX(dstr) = SvIVX(sstr);
3949 else if (sflags & SVp_IOK) {
3950 if (sflags & SVf_IOK)
3951 (void)SvIOK_only(dstr);
3953 (void)SvOK_off(dstr);
3954 (void)SvIOKp_on(dstr);
3956 /* XXXX Do we want to set IsUV for IV(ROK)? Be extra safe... */
3957 if (sflags & SVf_IVisUV)
3959 SvIVX(dstr) = SvIVX(sstr);
3960 if (sflags & SVp_NOK) {
3961 if (sflags & SVf_NOK)
3962 (void)SvNOK_on(dstr);
3964 (void)SvNOKp_on(dstr);
3965 SvNVX(dstr) = SvNVX(sstr);
3968 else if (sflags & SVp_NOK) {
3969 if (sflags & SVf_NOK)
3970 (void)SvNOK_only(dstr);
3972 (void)SvOK_off(dstr);
3975 SvNVX(dstr) = SvNVX(sstr);
3978 if (dtype == SVt_PVGV) {
3979 if (ckWARN(WARN_MISC))
3980 Perl_warner(aTHX_ packWARN(WARN_MISC), "Undefined value assigned to typeglob");
3983 (void)SvOK_off(dstr);
3985 if (SvTAINTED(sstr))
3990 =for apidoc sv_setsv_mg
3992 Like C<sv_setsv>, but also handles 'set' magic.
3998 Perl_sv_setsv_mg(pTHX_ SV *dstr, register SV *sstr)
4000 sv_setsv(dstr,sstr);
4005 =for apidoc sv_setpvn
4007 Copies a string into an SV. The C<len> parameter indicates the number of
4008 bytes to be copied. Does not handle 'set' magic. See C<sv_setpvn_mg>.
4014 Perl_sv_setpvn(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
4016 register char *dptr;
4018 SV_CHECK_THINKFIRST(sv);
4024 /* len is STRLEN which is unsigned, need to copy to signed */
4027 Perl_croak(aTHX_ "panic: sv_setpvn called with negative strlen");
4029 (void)SvUPGRADE(sv, SVt_PV);
4031 SvGROW(sv, len + 1);
4033 Move(ptr,dptr,len,char);
4036 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4041 =for apidoc sv_setpvn_mg
4043 Like C<sv_setpvn>, but also handles 'set' magic.
4049 Perl_sv_setpvn_mg(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
4051 sv_setpvn(sv,ptr,len);
4056 =for apidoc sv_setpv
4058 Copies a string into an SV. The string must be null-terminated. Does not
4059 handle 'set' magic. See C<sv_setpv_mg>.
4065 Perl_sv_setpv(pTHX_ register SV *sv, register const char *ptr)
4067 register STRLEN len;
4069 SV_CHECK_THINKFIRST(sv);
4075 (void)SvUPGRADE(sv, SVt_PV);
4077 SvGROW(sv, len + 1);
4078 Move(ptr,SvPVX(sv),len+1,char);
4080 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4085 =for apidoc sv_setpv_mg
4087 Like C<sv_setpv>, but also handles 'set' magic.
4093 Perl_sv_setpv_mg(pTHX_ register SV *sv, register const char *ptr)
4100 =for apidoc sv_usepvn
4102 Tells an SV to use C<ptr> to find its string value. Normally the string is
4103 stored inside the SV but sv_usepvn allows the SV to use an outside string.
4104 The C<ptr> should point to memory that was allocated by C<malloc>. The
4105 string length, C<len>, must be supplied. This function will realloc the
4106 memory pointed to by C<ptr>, so that pointer should not be freed or used by
4107 the programmer after giving it to sv_usepvn. Does not handle 'set' magic.
4108 See C<sv_usepvn_mg>.
4114 Perl_sv_usepvn(pTHX_ register SV *sv, register char *ptr, register STRLEN len)
4116 SV_CHECK_THINKFIRST(sv);
4117 (void)SvUPGRADE(sv, SVt_PV);
4122 (void)SvOOK_off(sv);
4123 if (SvPVX(sv) && SvLEN(sv))
4124 Safefree(SvPVX(sv));
4125 Renew(ptr, len+1, char);
4128 SvLEN_set(sv, len+1);
4130 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4135 =for apidoc sv_usepvn_mg
4137 Like C<sv_usepvn>, but also handles 'set' magic.
4143 Perl_sv_usepvn_mg(pTHX_ register SV *sv, register char *ptr, register STRLEN len)
4145 sv_usepvn(sv,ptr,len);
4150 =for apidoc sv_force_normal_flags
4152 Undo various types of fakery on an SV: if the PV is a shared string, make
4153 a private copy; if we're a ref, stop refing; if we're a glob, downgrade to
4154 an xpvmg. The C<flags> parameter gets passed to C<sv_unref_flags()>
4155 when unrefing. C<sv_force_normal> calls this function with flags set to 0.
4161 Perl_sv_force_normal_flags(pTHX_ register SV *sv, U32 flags)
4163 if (SvREADONLY(sv)) {
4165 char *pvx = SvPVX(sv);
4166 STRLEN len = SvCUR(sv);
4167 U32 hash = SvUVX(sv);
4168 SvGROW(sv, len + 1);
4169 Move(pvx,SvPVX(sv),len,char);
4173 unsharepvn(pvx, SvUTF8(sv) ? -(I32)len : len, hash);
4175 else if (PL_curcop != &PL_compiling)
4176 Perl_croak(aTHX_ PL_no_modify);
4179 sv_unref_flags(sv, flags);
4180 else if (SvFAKE(sv) && SvTYPE(sv) == SVt_PVGV)
4185 =for apidoc sv_force_normal
4187 Undo various types of fakery on an SV: if the PV is a shared string, make
4188 a private copy; if we're a ref, stop refing; if we're a glob, downgrade to
4189 an xpvmg. See also C<sv_force_normal_flags>.
4195 Perl_sv_force_normal(pTHX_ register SV *sv)
4197 sv_force_normal_flags(sv, 0);
4203 Efficient removal of characters from the beginning of the string buffer.
4204 SvPOK(sv) must be true and the C<ptr> must be a pointer to somewhere inside
4205 the string buffer. The C<ptr> becomes the first character of the adjusted
4206 string. Uses the "OOK hack".
4212 Perl_sv_chop(pTHX_ register SV *sv, register char *ptr)
4214 register STRLEN delta;
4216 if (!ptr || !SvPOKp(sv))
4218 SV_CHECK_THINKFIRST(sv);
4219 if (SvTYPE(sv) < SVt_PVIV)
4220 sv_upgrade(sv,SVt_PVIV);
4223 if (!SvLEN(sv)) { /* make copy of shared string */
4224 char *pvx = SvPVX(sv);
4225 STRLEN len = SvCUR(sv);
4226 SvGROW(sv, len + 1);
4227 Move(pvx,SvPVX(sv),len,char);
4231 SvFLAGS(sv) |= SVf_OOK;
4233 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVp_IOK|SVp_NOK|SVf_IVisUV);
4234 delta = ptr - SvPVX(sv);
4242 =for apidoc sv_catpvn
4244 Concatenates the string onto the end of the string which is in the SV. The
4245 C<len> indicates number of bytes to copy. If the SV has the UTF8
4246 status set, then the bytes appended should be valid UTF8.
4247 Handles 'get' magic, but not 'set' magic. See C<sv_catpvn_mg>.
4249 =for apidoc sv_catpvn_flags
4251 Concatenates the string onto the end of the string which is in the SV. The
4252 C<len> indicates number of bytes to copy. If the SV has the UTF8
4253 status set, then the bytes appended should be valid UTF8.
4254 If C<flags> has C<SV_GMAGIC> bit set, will C<mg_get> on C<dsv> if
4255 appropriate, else not. C<sv_catpvn> and C<sv_catpvn_nomg> are implemented
4256 in terms of this function.
4262 Perl_sv_catpvn_flags(pTHX_ register SV *dsv, register const char *sstr, register STRLEN slen, I32 flags)
4267 dstr = SvPV_force_flags(dsv, dlen, flags);
4268 SvGROW(dsv, dlen + slen + 1);
4271 Move(sstr, SvPVX(dsv) + dlen, slen, char);
4274 (void)SvPOK_only_UTF8(dsv); /* validate pointer */
4279 =for apidoc sv_catpvn_mg
4281 Like C<sv_catpvn>, but also handles 'set' magic.
4287 Perl_sv_catpvn_mg(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
4289 sv_catpvn(sv,ptr,len);
4294 =for apidoc sv_catsv
4296 Concatenates the string from SV C<ssv> onto the end of the string in
4297 SV C<dsv>. Modifies C<dsv> but not C<ssv>. Handles 'get' magic, but
4298 not 'set' magic. See C<sv_catsv_mg>.
4300 =for apidoc sv_catsv_flags
4302 Concatenates the string from SV C<ssv> onto the end of the string in
4303 SV C<dsv>. Modifies C<dsv> but not C<ssv>. If C<flags> has C<SV_GMAGIC>
4304 bit set, will C<mg_get> on the SVs if appropriate, else not. C<sv_catsv>
4305 and C<sv_catsv_nomg> are implemented in terms of this function.
4310 Perl_sv_catsv_flags(pTHX_ SV *dsv, register SV *ssv, I32 flags)
4316 if ((spv = SvPV(ssv, slen))) {
4317 /* sutf8 and dutf8 were type bool, but under USE_ITHREADS,
4318 gcc version 2.95.2 20000220 (Debian GNU/Linux) for
4319 Linux xxx 2.2.17 on sparc64 with gcc -O2, we erroneously
4320 get dutf8 = 0x20000000, (i.e. SVf_UTF8) even though
4321 dsv->sv_flags doesn't have that bit set.
4322 Andy Dougherty 12 Oct 2001
4324 I32 sutf8 = DO_UTF8(ssv);
4327 if (SvGMAGICAL(dsv) && (flags & SV_GMAGIC))
4329 dutf8 = DO_UTF8(dsv);
4331 if (dutf8 != sutf8) {
4333 /* Not modifying source SV, so taking a temporary copy. */
4334 SV* csv = sv_2mortal(newSVpvn(spv, slen));
4336 sv_utf8_upgrade(csv);
4337 spv = SvPV(csv, slen);
4340 sv_utf8_upgrade_nomg(dsv);
4342 sv_catpvn_nomg(dsv, spv, slen);
4347 =for apidoc sv_catsv_mg
4349 Like C<sv_catsv>, but also handles 'set' magic.
4355 Perl_sv_catsv_mg(pTHX_ SV *dsv, register SV *ssv)
4362 =for apidoc sv_catpv
4364 Concatenates the string onto the end of the string which is in the SV.
4365 If the SV has the UTF8 status set, then the bytes appended should be
4366 valid UTF8. Handles 'get' magic, but not 'set' magic. See C<sv_catpv_mg>.
4371 Perl_sv_catpv(pTHX_ register SV *sv, register const char *ptr)
4373 register STRLEN len;
4379 junk = SvPV_force(sv, tlen);
4381 SvGROW(sv, tlen + len + 1);
4384 Move(ptr,SvPVX(sv)+tlen,len+1,char);
4386 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4391 =for apidoc sv_catpv_mg
4393 Like C<sv_catpv>, but also handles 'set' magic.
4399 Perl_sv_catpv_mg(pTHX_ register SV *sv, register const char *ptr)
4408 Create a new null SV, or if len > 0, create a new empty SVt_PV type SV
4409 with an initial PV allocation of len+1. Normally accessed via the C<NEWSV>
4416 Perl_newSV(pTHX_ STRLEN len)
4422 sv_upgrade(sv, SVt_PV);
4423 SvGROW(sv, len + 1);
4428 =for apidoc sv_magicext
4430 Adds magic to an SV, upgrading it if necessary. Applies the
4431 supplied vtable and returns pointer to the magic added.
4433 Note that sv_magicext will allow things that sv_magic will not.
4434 In particular you can add magic to SvREADONLY SVs and and more than
4435 one instance of the same 'how'
4437 I C<namelen> is greater then zero then a savepvn() I<copy> of C<name> is stored,
4438 if C<namelen> is zero then C<name> is stored as-is and - as another special
4439 case - if C<(name && namelen == HEf_SVKEY)> then C<name> is assumed to contain
4440 an C<SV*> and has its REFCNT incremented
4442 (This is now used as a subroutine by sv_magic.)
4447 Perl_sv_magicext(pTHX_ SV* sv, SV* obj, int how, MGVTBL *vtable,
4448 const char* name, I32 namlen)
4452 if (SvTYPE(sv) < SVt_PVMG) {
4453 (void)SvUPGRADE(sv, SVt_PVMG);
4455 Newz(702,mg, 1, MAGIC);
4456 mg->mg_moremagic = SvMAGIC(sv);
4459 /* Some magic sontains a reference loop, where the sv and object refer to
4460 each other. To prevent a reference loop that would prevent such
4461 objects being freed, we look for such loops and if we find one we
4462 avoid incrementing the object refcount. */
4463 if (!obj || obj == sv ||
4464 how == PERL_MAGIC_arylen ||
4465 how == PERL_MAGIC_qr ||
4466 (SvTYPE(obj) == SVt_PVGV &&
4467 (GvSV(obj) == sv || GvHV(obj) == (HV*)sv || GvAV(obj) == (AV*)sv ||
4468 GvCV(obj) == (CV*)sv || GvIOp(obj) == (IO*)sv ||
4469 GvFORM(obj) == (CV*)sv)) ||
4470 (how == PERL_MAGIC_tiedscalar &&
4471 SvROK(obj) && (SvRV(obj) == sv || GvIO(SvRV(obj)) == (IO*)sv)))
4476 mg->mg_obj = SvREFCNT_inc(obj);
4477 mg->mg_flags |= MGf_REFCOUNTED;
4480 mg->mg_len = namlen;
4483 mg->mg_ptr = savepvn(name, namlen);
4484 else if (namlen == HEf_SVKEY)
4485 mg->mg_ptr = (char*)SvREFCNT_inc((SV*)name);
4487 mg->mg_ptr = (char *) name;
4489 mg->mg_virtual = vtable;
4493 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
4498 =for apidoc sv_magic
4500 Adds magic to an SV. First upgrades C<sv> to type C<SVt_PVMG> if necessary,
4501 then adds a new magic item of type C<how> to the head of the magic list.
4507 Perl_sv_magic(pTHX_ register SV *sv, SV *obj, int how, const char *name, I32 namlen)
4512 if (SvREADONLY(sv)) {
4513 if (PL_curcop != &PL_compiling
4514 && how != PERL_MAGIC_regex_global
4515 && how != PERL_MAGIC_bm
4516 && how != PERL_MAGIC_fm
4517 && how != PERL_MAGIC_sv
4520 Perl_croak(aTHX_ PL_no_modify);
4523 if (SvMAGICAL(sv) || (how == PERL_MAGIC_taint && SvTYPE(sv) >= SVt_PVMG)) {
4524 if (SvMAGIC(sv) && (mg = mg_find(sv, how))) {
4525 /* sv_magic() refuses to add a magic of the same 'how' as an
4528 if (how == PERL_MAGIC_taint)
4536 vtable = &PL_vtbl_sv;
4538 case PERL_MAGIC_overload:
4539 vtable = &PL_vtbl_amagic;
4541 case PERL_MAGIC_overload_elem:
4542 vtable = &PL_vtbl_amagicelem;
4544 case PERL_MAGIC_overload_table:
4545 vtable = &PL_vtbl_ovrld;
4548 vtable = &PL_vtbl_bm;
4550 case PERL_MAGIC_regdata:
4551 vtable = &PL_vtbl_regdata;
4553 case PERL_MAGIC_regdatum:
4554 vtable = &PL_vtbl_regdatum;
4556 case PERL_MAGIC_env:
4557 vtable = &PL_vtbl_env;
4560 vtable = &PL_vtbl_fm;
4562 case PERL_MAGIC_envelem:
4563 vtable = &PL_vtbl_envelem;
4565 case PERL_MAGIC_regex_global:
4566 vtable = &PL_vtbl_mglob;
4568 case PERL_MAGIC_isa:
4569 vtable = &PL_vtbl_isa;
4571 case PERL_MAGIC_isaelem:
4572 vtable = &PL_vtbl_isaelem;
4574 case PERL_MAGIC_nkeys:
4575 vtable = &PL_vtbl_nkeys;
4577 case PERL_MAGIC_dbfile:
4580 case PERL_MAGIC_dbline:
4581 vtable = &PL_vtbl_dbline;
4583 #ifdef USE_5005THREADS
4584 case PERL_MAGIC_mutex:
4585 vtable = &PL_vtbl_mutex;
4587 #endif /* USE_5005THREADS */
4588 #ifdef USE_LOCALE_COLLATE
4589 case PERL_MAGIC_collxfrm:
4590 vtable = &PL_vtbl_collxfrm;
4592 #endif /* USE_LOCALE_COLLATE */
4593 case PERL_MAGIC_tied:
4594 vtable = &PL_vtbl_pack;
4596 case PERL_MAGIC_tiedelem:
4597 case PERL_MAGIC_tiedscalar:
4598 vtable = &PL_vtbl_packelem;
4601 vtable = &PL_vtbl_regexp;
4603 case PERL_MAGIC_sig:
4604 vtable = &PL_vtbl_sig;
4606 case PERL_MAGIC_sigelem:
4607 vtable = &PL_vtbl_sigelem;
4609 case PERL_MAGIC_taint:
4610 vtable = &PL_vtbl_taint;
4612 case PERL_MAGIC_uvar:
4613 vtable = &PL_vtbl_uvar;
4615 case PERL_MAGIC_vec:
4616 vtable = &PL_vtbl_vec;
4618 case PERL_MAGIC_substr:
4619 vtable = &PL_vtbl_substr;
4621 case PERL_MAGIC_defelem:
4622 vtable = &PL_vtbl_defelem;
4624 case PERL_MAGIC_glob:
4625 vtable = &PL_vtbl_glob;
4627 case PERL_MAGIC_arylen:
4628 vtable = &PL_vtbl_arylen;
4630 case PERL_MAGIC_pos:
4631 vtable = &PL_vtbl_pos;
4633 case PERL_MAGIC_backref:
4634 vtable = &PL_vtbl_backref;
4636 case PERL_MAGIC_ext:
4637 /* Reserved for use by extensions not perl internals. */
4638 /* Useful for attaching extension internal data to perl vars. */
4639 /* Note that multiple extensions may clash if magical scalars */
4640 /* etc holding private data from one are passed to another. */
4643 Perl_croak(aTHX_ "Don't know how to handle magic of type \\%o", how);
4646 /* Rest of work is done else where */
4647 mg = sv_magicext(sv,obj,how,vtable,name,namlen);
4650 case PERL_MAGIC_taint:
4653 case PERL_MAGIC_ext:
4654 case PERL_MAGIC_dbfile:
4661 =for apidoc sv_unmagic
4663 Removes all magic of type C<type> from an SV.
4669 Perl_sv_unmagic(pTHX_ SV *sv, int type)
4673 if (SvTYPE(sv) < SVt_PVMG || !SvMAGIC(sv))
4676 for (mg = *mgp; mg; mg = *mgp) {
4677 if (mg->mg_type == type) {
4678 MGVTBL* vtbl = mg->mg_virtual;
4679 *mgp = mg->mg_moremagic;
4680 if (vtbl && vtbl->svt_free)
4681 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
4682 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
4684 Safefree(mg->mg_ptr);
4685 else if (mg->mg_len == HEf_SVKEY)
4686 SvREFCNT_dec((SV*)mg->mg_ptr);
4688 if (mg->mg_flags & MGf_REFCOUNTED)
4689 SvREFCNT_dec(mg->mg_obj);
4693 mgp = &mg->mg_moremagic;
4697 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_NOK|SVp_POK)) >> PRIVSHIFT;
4704 =for apidoc sv_rvweaken
4706 Weaken a reference: set the C<SvWEAKREF> flag on this RV; give the
4707 referred-to SV C<PERL_MAGIC_backref> magic if it hasn't already; and
4708 push a back-reference to this RV onto the array of backreferences
4709 associated with that magic.
4715 Perl_sv_rvweaken(pTHX_ SV *sv)
4718 if (!SvOK(sv)) /* let undefs pass */
4721 Perl_croak(aTHX_ "Can't weaken a nonreference");
4722 else if (SvWEAKREF(sv)) {
4723 if (ckWARN(WARN_MISC))
4724 Perl_warner(aTHX_ packWARN(WARN_MISC), "Reference is already weak");
4728 sv_add_backref(tsv, sv);
4734 /* Give tsv backref magic if it hasn't already got it, then push a
4735 * back-reference to sv onto the array associated with the backref magic.
4739 S_sv_add_backref(pTHX_ SV *tsv, SV *sv)
4743 if (SvMAGICAL(tsv) && (mg = mg_find(tsv, PERL_MAGIC_backref)))
4744 av = (AV*)mg->mg_obj;
4747 sv_magic(tsv, (SV*)av, PERL_MAGIC_backref, NULL, 0);
4748 SvREFCNT_dec(av); /* for sv_magic */
4753 /* delete a back-reference to ourselves from the backref magic associated
4754 * with the SV we point to.
4758 S_sv_del_backref(pTHX_ SV *sv)
4765 if (!SvMAGICAL(tsv) || !(mg = mg_find(tsv, PERL_MAGIC_backref)))
4766 Perl_croak(aTHX_ "panic: del_backref");
4767 av = (AV *)mg->mg_obj;
4772 svp[i] = &PL_sv_undef; /* XXX */
4779 =for apidoc sv_insert
4781 Inserts a string at the specified offset/length within the SV. Similar to
4782 the Perl substr() function.
4788 Perl_sv_insert(pTHX_ SV *bigstr, STRLEN offset, STRLEN len, char *little, STRLEN littlelen)
4792 register char *midend;
4793 register char *bigend;
4799 Perl_croak(aTHX_ "Can't modify non-existent substring");
4800 SvPV_force(bigstr, curlen);
4801 (void)SvPOK_only_UTF8(bigstr);
4802 if (offset + len > curlen) {
4803 SvGROW(bigstr, offset+len+1);
4804 Zero(SvPVX(bigstr)+curlen, offset+len-curlen, char);
4805 SvCUR_set(bigstr, offset+len);
4809 i = littlelen - len;
4810 if (i > 0) { /* string might grow */
4811 big = SvGROW(bigstr, SvCUR(bigstr) + i + 1);
4812 mid = big + offset + len;
4813 midend = bigend = big + SvCUR(bigstr);
4816 while (midend > mid) /* shove everything down */
4817 *--bigend = *--midend;
4818 Move(little,big+offset,littlelen,char);
4824 Move(little,SvPVX(bigstr)+offset,len,char);
4829 big = SvPVX(bigstr);
4832 bigend = big + SvCUR(bigstr);
4834 if (midend > bigend)
4835 Perl_croak(aTHX_ "panic: sv_insert");
4837 if (mid - big > bigend - midend) { /* faster to shorten from end */
4839 Move(little, mid, littlelen,char);
4842 i = bigend - midend;
4844 Move(midend, mid, i,char);
4848 SvCUR_set(bigstr, mid - big);
4851 else if ((i = mid - big)) { /* faster from front */
4852 midend -= littlelen;
4854 sv_chop(bigstr,midend-i);
4859 Move(little, mid, littlelen,char);
4861 else if (littlelen) {
4862 midend -= littlelen;
4863 sv_chop(bigstr,midend);
4864 Move(little,midend,littlelen,char);
4867 sv_chop(bigstr,midend);
4873 =for apidoc sv_replace
4875 Make the first argument a copy of the second, then delete the original.
4876 The target SV physically takes over ownership of the body of the source SV
4877 and inherits its flags; however, the target keeps any magic it owns,
4878 and any magic in the source is discarded.
4879 Note that this is a rather specialist SV copying operation; most of the
4880 time you'll want to use C<sv_setsv> or one of its many macro front-ends.
4886 Perl_sv_replace(pTHX_ register SV *sv, register SV *nsv)
4888 U32 refcnt = SvREFCNT(sv);
4889 SV_CHECK_THINKFIRST(sv);
4890 if (SvREFCNT(nsv) != 1 && ckWARN_d(WARN_INTERNAL))
4891 Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Reference miscount in sv_replace()");
4892 if (SvMAGICAL(sv)) {
4896 sv_upgrade(nsv, SVt_PVMG);
4897 SvMAGIC(nsv) = SvMAGIC(sv);
4898 SvFLAGS(nsv) |= SvMAGICAL(sv);
4904 assert(!SvREFCNT(sv));
4905 StructCopy(nsv,sv,SV);
4906 SvREFCNT(sv) = refcnt;
4907 SvFLAGS(nsv) |= SVTYPEMASK; /* Mark as freed */
4912 =for apidoc sv_clear
4914 Clear an SV: call any destructors, free up any memory used by the body,
4915 and free the body itself. The SV's head is I<not> freed, although
4916 its type is set to all 1's so that it won't inadvertently be assumed
4917 to be live during global destruction etc.
4918 This function should only be called when REFCNT is zero. Most of the time
4919 you'll want to call C<sv_free()> (or its macro wrapper C<SvREFCNT_dec>)
4926 Perl_sv_clear(pTHX_ register SV *sv)
4930 assert(SvREFCNT(sv) == 0);
4933 if (PL_defstash) { /* Still have a symbol table? */
4938 Zero(&tmpref, 1, SV);
4939 sv_upgrade(&tmpref, SVt_RV);
4941 SvREADONLY_on(&tmpref); /* DESTROY() could be naughty */
4942 SvREFCNT(&tmpref) = 1;
4945 stash = SvSTASH(sv);
4946 destructor = StashHANDLER(stash,DESTROY);
4949 PUSHSTACKi(PERLSI_DESTROY);
4950 SvRV(&tmpref) = SvREFCNT_inc(sv);
4955 call_sv((SV*)destructor, G_DISCARD|G_EVAL|G_KEEPERR);
4961 } while (SvOBJECT(sv) && SvSTASH(sv) != stash);
4963 del_XRV(SvANY(&tmpref));
4966 if (PL_in_clean_objs)
4967 Perl_croak(aTHX_ "DESTROY created new reference to dead object '%s'",
4969 /* DESTROY gave object new lease on life */
4975 SvREFCNT_dec(SvSTASH(sv)); /* possibly of changed persuasion */
4976 SvOBJECT_off(sv); /* Curse the object. */
4977 if (SvTYPE(sv) != SVt_PVIO)
4978 --PL_sv_objcount; /* XXX Might want something more general */
4981 if (SvTYPE(sv) >= SVt_PVMG) {
4984 if (SvFLAGS(sv) & SVpad_TYPED)
4985 SvREFCNT_dec(SvSTASH(sv));
4988 switch (SvTYPE(sv)) {
4991 IoIFP(sv) != PerlIO_stdin() &&
4992 IoIFP(sv) != PerlIO_stdout() &&
4993 IoIFP(sv) != PerlIO_stderr())
4995 io_close((IO*)sv, FALSE);
4997 if (IoDIRP(sv) && !(IoFLAGS(sv) & IOf_FAKE_DIRP))
4998 PerlDir_close(IoDIRP(sv));
4999 IoDIRP(sv) = (DIR*)NULL;
5000 Safefree(IoTOP_NAME(sv));
5001 Safefree(IoFMT_NAME(sv));
5002 Safefree(IoBOTTOM_NAME(sv));
5017 SvREFCNT_dec(LvTARG(sv));
5021 Safefree(GvNAME(sv));
5022 /* cannot decrease stash refcount yet, as we might recursively delete
5023 ourselves when the refcnt drops to zero. Delay SvREFCNT_dec
5024 of stash until current sv is completely gone.
5025 -- JohnPC, 27 Mar 1998 */
5026 stash = GvSTASH(sv);
5032 (void)SvOOK_off(sv);
5040 SvREFCNT_dec(SvRV(sv));
5042 else if (SvPVX(sv) && SvLEN(sv))
5043 Safefree(SvPVX(sv));
5044 else if (SvPVX(sv) && SvREADONLY(sv) && SvFAKE(sv)) {
5045 unsharepvn(SvPVX(sv),
5046 SvUTF8(sv) ? -(I32)SvCUR(sv) : SvCUR(sv),
5059 switch (SvTYPE(sv)) {
5075 del_XPVIV(SvANY(sv));
5078 del_XPVNV(SvANY(sv));
5081 del_XPVMG(SvANY(sv));
5084 del_XPVLV(SvANY(sv));
5087 del_XPVAV(SvANY(sv));
5090 del_XPVHV(SvANY(sv));
5093 del_XPVCV(SvANY(sv));
5096 del_XPVGV(SvANY(sv));
5097 /* code duplication for increased performance. */
5098 SvFLAGS(sv) &= SVf_BREAK;
5099 SvFLAGS(sv) |= SVTYPEMASK;
5100 /* decrease refcount of the stash that owns this GV, if any */
5102 SvREFCNT_dec(stash);
5103 return; /* not break, SvFLAGS reset already happened */
5105 del_XPVBM(SvANY(sv));
5108 del_XPVFM(SvANY(sv));
5111 del_XPVIO(SvANY(sv));
5114 SvFLAGS(sv) &= SVf_BREAK;
5115 SvFLAGS(sv) |= SVTYPEMASK;
5119 =for apidoc sv_newref
5121 Increment an SV's reference count. Use the C<SvREFCNT_inc()> wrapper
5128 Perl_sv_newref(pTHX_ SV *sv)
5131 ATOMIC_INC(SvREFCNT(sv));
5138 Decrement an SV's reference count, and if it drops to zero, call
5139 C<sv_clear> to invoke destructors and free up any memory used by
5140 the body; finally, deallocate the SV's head itself.
5141 Normally called via a wrapper macro C<SvREFCNT_dec>.
5147 Perl_sv_free(pTHX_ SV *sv)
5149 int refcount_is_zero;
5153 if (SvREFCNT(sv) == 0) {
5154 if (SvFLAGS(sv) & SVf_BREAK)
5155 /* this SV's refcnt has been artificially decremented to
5156 * trigger cleanup */
5158 if (PL_in_clean_all) /* All is fair */
5160 if (SvREADONLY(sv) && SvIMMORTAL(sv)) {
5161 /* make sure SvREFCNT(sv)==0 happens very seldom */
5162 SvREFCNT(sv) = (~(U32)0)/2;
5165 if (ckWARN_d(WARN_INTERNAL))
5166 Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Attempt to free unreferenced scalar");
5169 ATOMIC_DEC_AND_TEST(refcount_is_zero, SvREFCNT(sv));
5170 if (!refcount_is_zero)
5174 if (ckWARN_d(WARN_DEBUGGING))
5175 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
5176 "Attempt to free temp prematurely: SV 0x%"UVxf,
5181 if (SvREADONLY(sv) && SvIMMORTAL(sv)) {
5182 /* make sure SvREFCNT(sv)==0 happens very seldom */
5183 SvREFCNT(sv) = (~(U32)0)/2;
5194 Returns the length of the string in the SV. Handles magic and type
5195 coercion. See also C<SvCUR>, which gives raw access to the xpv_cur slot.
5201 Perl_sv_len(pTHX_ register SV *sv)
5209 len = mg_length(sv);
5211 (void)SvPV(sv, len);
5216 =for apidoc sv_len_utf8
5218 Returns the number of characters in the string in an SV, counting wide
5219 UTF8 bytes as a single character. Handles magic and type coercion.
5225 Perl_sv_len_utf8(pTHX_ register SV *sv)
5231 return mg_length(sv);
5235 U8 *s = (U8*)SvPV(sv, len);
5237 return Perl_utf8_length(aTHX_ s, s + len);
5242 =for apidoc sv_pos_u2b
5244 Converts the value pointed to by offsetp from a count of UTF8 chars from
5245 the start of the string, to a count of the equivalent number of bytes; if
5246 lenp is non-zero, it does the same to lenp, but this time starting from
5247 the offset, rather than from the start of the string. Handles magic and
5254 Perl_sv_pos_u2b(pTHX_ register SV *sv, I32* offsetp, I32* lenp)
5259 I32 uoffset = *offsetp;
5265 start = s = (U8*)SvPV(sv, len);
5267 while (s < send && uoffset--)
5271 *offsetp = s - start;
5275 while (s < send && ulen--)
5285 =for apidoc sv_pos_b2u
5287 Converts the value pointed to by offsetp from a count of bytes from the
5288 start of the string, to a count of the equivalent number of UTF8 chars.
5289 Handles magic and type coercion.
5295 Perl_sv_pos_b2u(pTHX_ register SV *sv, I32* offsetp)
5304 s = (U8*)SvPV(sv, len);
5305 if ((I32)len < *offsetp)
5306 Perl_croak(aTHX_ "panic: sv_pos_b2u: bad byte offset");
5307 send = s + *offsetp;
5311 /* Call utf8n_to_uvchr() to validate the sequence */
5312 utf8n_to_uvchr(s, UTF8SKIP(s), &n, 0);
5327 Returns a boolean indicating whether the strings in the two SVs are
5328 identical. Is UTF-8 and 'use bytes' aware, handles get magic, and will
5329 coerce its args to strings if necessary.
5335 Perl_sv_eq(pTHX_ register SV *sv1, register SV *sv2)
5343 SV* svrecode = Nullsv;
5350 pv1 = SvPV(sv1, cur1);
5357 pv2 = SvPV(sv2, cur2);
5359 if (cur1 && cur2 && SvUTF8(sv1) != SvUTF8(sv2) && !IN_BYTES) {
5360 /* Differing utf8ness.
5361 * Do not UTF8size the comparands as a side-effect. */
5364 svrecode = newSVpvn(pv2, cur2);
5365 sv_recode_to_utf8(svrecode, PL_encoding);
5366 pv2 = SvPV(svrecode, cur2);
5369 svrecode = newSVpvn(pv1, cur1);
5370 sv_recode_to_utf8(svrecode, PL_encoding);
5371 pv1 = SvPV(svrecode, cur1);
5373 /* Now both are in UTF-8. */
5378 bool is_utf8 = TRUE;
5381 /* sv1 is the UTF-8 one,
5382 * if is equal it must be downgrade-able */
5383 char *pv = (char*)bytes_from_utf8((U8*)pv1,
5389 /* sv2 is the UTF-8 one,
5390 * if is equal it must be downgrade-able */
5391 char *pv = (char *)bytes_from_utf8((U8*)pv2,
5397 /* Downgrade not possible - cannot be eq */
5404 eq = memEQ(pv1, pv2, cur1);
5407 SvREFCNT_dec(svrecode);
5418 Compares the strings in two SVs. Returns -1, 0, or 1 indicating whether the
5419 string in C<sv1> is less than, equal to, or greater than the string in
5420 C<sv2>. Is UTF-8 and 'use bytes' aware, handles get magic, and will
5421 coerce its args to strings if necessary. See also C<sv_cmp_locale>.
5427 Perl_sv_cmp(pTHX_ register SV *sv1, register SV *sv2)
5430 char *pv1, *pv2, *tpv = Nullch;
5432 SV *svrecode = Nullsv;
5439 pv1 = SvPV(sv1, cur1);
5446 pv2 = SvPV(sv2, cur2);
5448 if (cur1 && cur2 && SvUTF8(sv1) != SvUTF8(sv2) && !IN_BYTES) {
5449 /* Differing utf8ness.
5450 * Do not UTF8size the comparands as a side-effect. */
5453 svrecode = newSVpvn(pv2, cur2);
5454 sv_recode_to_utf8(svrecode, PL_encoding);
5455 pv2 = SvPV(svrecode, cur2);
5458 pv2 = tpv = (char*)bytes_to_utf8((U8*)pv2, &cur2);
5463 svrecode = newSVpvn(pv1, cur1);
5464 sv_recode_to_utf8(svrecode, PL_encoding);
5465 pv1 = SvPV(svrecode, cur1);
5468 pv1 = tpv = (char*)bytes_to_utf8((U8*)pv1, &cur1);
5474 cmp = cur2 ? -1 : 0;
5478 I32 retval = memcmp((void*)pv1, (void*)pv2, cur1 < cur2 ? cur1 : cur2);
5481 cmp = retval < 0 ? -1 : 1;
5482 } else if (cur1 == cur2) {
5485 cmp = cur1 < cur2 ? -1 : 1;
5490 SvREFCNT_dec(svrecode);
5499 =for apidoc sv_cmp_locale
5501 Compares the strings in two SVs in a locale-aware manner. Is UTF-8 and
5502 'use bytes' aware, handles get magic, and will coerce its args to strings
5503 if necessary. See also C<sv_cmp_locale>. See also C<sv_cmp>.
5509 Perl_sv_cmp_locale(pTHX_ register SV *sv1, register SV *sv2)
5511 #ifdef USE_LOCALE_COLLATE
5517 if (PL_collation_standard)
5521 pv1 = sv1 ? sv_collxfrm(sv1, &len1) : (char *) NULL;
5523 pv2 = sv2 ? sv_collxfrm(sv2, &len2) : (char *) NULL;
5525 if (!pv1 || !len1) {
5536 retval = memcmp((void*)pv1, (void*)pv2, len1 < len2 ? len1 : len2);
5539 return retval < 0 ? -1 : 1;
5542 * When the result of collation is equality, that doesn't mean
5543 * that there are no differences -- some locales exclude some
5544 * characters from consideration. So to avoid false equalities,
5545 * we use the raw string as a tiebreaker.
5551 #endif /* USE_LOCALE_COLLATE */
5553 return sv_cmp(sv1, sv2);
5557 #ifdef USE_LOCALE_COLLATE
5560 =for apidoc sv_collxfrm
5562 Add Collate Transform magic to an SV if it doesn't already have it.
5564 Any scalar variable may carry PERL_MAGIC_collxfrm magic that contains the
5565 scalar data of the variable, but transformed to such a format that a normal
5566 memory comparison can be used to compare the data according to the locale
5573 Perl_sv_collxfrm(pTHX_ SV *sv, STRLEN *nxp)
5577 mg = SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_collxfrm) : (MAGIC *) NULL;
5578 if (!mg || !mg->mg_ptr || *(U32*)mg->mg_ptr != PL_collation_ix) {
5583 Safefree(mg->mg_ptr);
5585 if ((xf = mem_collxfrm(s, len, &xlen))) {
5586 if (SvREADONLY(sv)) {
5589 return xf + sizeof(PL_collation_ix);
5592 sv_magic(sv, 0, PERL_MAGIC_collxfrm, 0, 0);
5593 mg = mg_find(sv, PERL_MAGIC_collxfrm);
5606 if (mg && mg->mg_ptr) {
5608 return mg->mg_ptr + sizeof(PL_collation_ix);
5616 #endif /* USE_LOCALE_COLLATE */
5621 Get a line from the filehandle and store it into the SV, optionally
5622 appending to the currently-stored string.
5628 Perl_sv_gets(pTHX_ register SV *sv, register PerlIO *fp, I32 append)
5632 register STDCHAR rslast;
5633 register STDCHAR *bp;
5638 SV_CHECK_THINKFIRST(sv);
5639 (void)SvUPGRADE(sv, SVt_PV);
5643 if (PL_curcop == &PL_compiling) {
5644 /* we always read code in line mode */
5648 else if (RsSNARF(PL_rs)) {
5652 else if (RsRECORD(PL_rs)) {
5653 I32 recsize, bytesread;
5656 /* Grab the size of the record we're getting */
5657 recsize = SvIV(SvRV(PL_rs));
5658 (void)SvPOK_only(sv); /* Validate pointer */
5659 buffer = SvGROW(sv, (STRLEN)(recsize + 1));
5662 /* VMS wants read instead of fread, because fread doesn't respect */
5663 /* RMS record boundaries. This is not necessarily a good thing to be */
5664 /* doing, but we've got no other real choice */
5665 bytesread = PerlLIO_read(PerlIO_fileno(fp), buffer, recsize);
5667 bytesread = PerlIO_read(fp, buffer, recsize);
5669 SvCUR_set(sv, bytesread);
5670 buffer[bytesread] = '\0';
5671 if (PerlIO_isutf8(fp))
5675 return(SvCUR(sv) ? SvPVX(sv) : Nullch);
5677 else if (RsPARA(PL_rs)) {
5683 /* Get $/ i.e. PL_rs into same encoding as stream wants */
5684 if (PerlIO_isutf8(fp)) {
5685 rsptr = SvPVutf8(PL_rs, rslen);
5688 if (SvUTF8(PL_rs)) {
5689 if (!sv_utf8_downgrade(PL_rs, TRUE)) {
5690 Perl_croak(aTHX_ "Wide character in $/");
5693 rsptr = SvPV(PL_rs, rslen);
5697 rslast = rslen ? rsptr[rslen - 1] : '\0';
5699 if (rspara) { /* have to do this both before and after */
5700 do { /* to make sure file boundaries work right */
5703 i = PerlIO_getc(fp);
5707 PerlIO_ungetc(fp,i);
5713 /* See if we know enough about I/O mechanism to cheat it ! */
5715 /* This used to be #ifdef test - it is made run-time test for ease
5716 of abstracting out stdio interface. One call should be cheap
5717 enough here - and may even be a macro allowing compile
5721 if (PerlIO_fast_gets(fp)) {
5724 * We're going to steal some values from the stdio struct
5725 * and put EVERYTHING in the innermost loop into registers.
5727 register STDCHAR *ptr;
5731 #if defined(VMS) && defined(PERLIO_IS_STDIO)
5732 /* An ungetc()d char is handled separately from the regular
5733 * buffer, so we getc() it back out and stuff it in the buffer.
5735 i = PerlIO_getc(fp);
5736 if (i == EOF) return 0;
5737 *(--((*fp)->_ptr)) = (unsigned char) i;
5741 /* Here is some breathtakingly efficient cheating */
5743 cnt = PerlIO_get_cnt(fp); /* get count into register */
5744 (void)SvPOK_only(sv); /* validate pointer */
5745 if ((I32)(SvLEN(sv) - append) <= cnt + 1) { /* make sure we have the room */
5746 if (cnt > 80 && (I32)SvLEN(sv) > append) {
5747 shortbuffered = cnt - SvLEN(sv) + append + 1;
5748 cnt -= shortbuffered;
5752 /* remember that cnt can be negative */
5753 SvGROW(sv, (STRLEN)(append + (cnt <= 0 ? 2 : (cnt + 1))));
5758 bp = (STDCHAR*)SvPVX(sv) + append; /* move these two too to registers */
5759 ptr = (STDCHAR*)PerlIO_get_ptr(fp);
5760 DEBUG_P(PerlIO_printf(Perl_debug_log,
5761 "Screamer: entering, ptr=%"UVuf", cnt=%ld\n",PTR2UV(ptr),(long)cnt));
5762 DEBUG_P(PerlIO_printf(Perl_debug_log,
5763 "Screamer: entering: PerlIO * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
5764 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
5765 PTR2UV(PerlIO_has_base(fp) ? PerlIO_get_base(fp) : 0)));
5770 while (cnt > 0) { /* this | eat */
5772 if ((*bp++ = *ptr++) == rslast) /* really | dust */
5773 goto thats_all_folks; /* screams | sed :-) */
5777 Copy(ptr, bp, cnt, char); /* this | eat */
5778 bp += cnt; /* screams | dust */
5779 ptr += cnt; /* louder | sed :-) */
5784 if (shortbuffered) { /* oh well, must extend */
5785 cnt = shortbuffered;
5787 bpx = bp - (STDCHAR*)SvPVX(sv); /* box up before relocation */
5789 SvGROW(sv, SvLEN(sv) + append + cnt + 2);
5790 bp = (STDCHAR*)SvPVX(sv) + bpx; /* unbox after relocation */
5794 DEBUG_P(PerlIO_printf(Perl_debug_log,
5795 "Screamer: going to getc, ptr=%"UVuf", cnt=%ld\n",
5796 PTR2UV(ptr),(long)cnt));
5797 PerlIO_set_ptrcnt(fp, (STDCHAR*)ptr, cnt); /* deregisterize cnt and ptr */
5799 DEBUG_P(PerlIO_printf(Perl_debug_log,
5800 "Screamer: pre: FILE * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
5801 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
5802 PTR2UV(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0)));
5804 /* This used to call 'filbuf' in stdio form, but as that behaves like
5805 getc when cnt <= 0 we use PerlIO_getc here to avoid introducing
5806 another abstraction. */
5807 i = PerlIO_getc(fp); /* get more characters */
5809 DEBUG_P(PerlIO_printf(Perl_debug_log,
5810 "Screamer: post: FILE * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
5811 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
5812 PTR2UV(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0)));
5814 cnt = PerlIO_get_cnt(fp);
5815 ptr = (STDCHAR*)PerlIO_get_ptr(fp); /* reregisterize cnt and ptr */
5816 DEBUG_P(PerlIO_printf(Perl_debug_log,
5817 "Screamer: after getc, ptr=%"UVuf", cnt=%ld\n",PTR2UV(ptr),(long)cnt));
5819 if (i == EOF) /* all done for ever? */
5820 goto thats_really_all_folks;
5822 bpx = bp - (STDCHAR*)SvPVX(sv); /* box up before relocation */
5824 SvGROW(sv, bpx + cnt + 2);
5825 bp = (STDCHAR*)SvPVX(sv) + bpx; /* unbox after relocation */
5827 *bp++ = (STDCHAR)i; /* store character from PerlIO_getc */
5829 if (rslen && (STDCHAR)i == rslast) /* all done for now? */
5830 goto thats_all_folks;
5834 if ((rslen > 1 && (STRLEN)(bp - (STDCHAR*)SvPVX(sv)) < rslen) ||
5835 memNE((char*)bp - rslen, rsptr, rslen))
5836 goto screamer; /* go back to the fray */
5837 thats_really_all_folks:
5839 cnt += shortbuffered;
5840 DEBUG_P(PerlIO_printf(Perl_debug_log,
5841 "Screamer: quitting, ptr=%"UVuf", cnt=%ld\n",PTR2UV(ptr),(long)cnt));
5842 PerlIO_set_ptrcnt(fp, (STDCHAR*)ptr, cnt); /* put these back or we're in trouble */
5843 DEBUG_P(PerlIO_printf(Perl_debug_log,
5844 "Screamer: end: FILE * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
5845 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
5846 PTR2UV(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0)));
5848 SvCUR_set(sv, bp - (STDCHAR*)SvPVX(sv)); /* set length */
5849 DEBUG_P(PerlIO_printf(Perl_debug_log,
5850 "Screamer: done, len=%ld, string=|%.*s|\n",
5851 (long)SvCUR(sv),(int)SvCUR(sv),SvPVX(sv)));
5856 /*The big, slow, and stupid way */
5859 /* Need to work around EPOC SDK features */
5860 /* On WINS: MS VC5 generates calls to _chkstk, */
5861 /* if a `large' stack frame is allocated */
5862 /* gcc on MARM does not generate calls like these */
5868 register STDCHAR *bpe = buf + sizeof(buf);
5870 while ((i = PerlIO_getc(fp)) != EOF && (*bp++ = (STDCHAR)i) != rslast && bp < bpe)
5871 ; /* keep reading */
5875 cnt = PerlIO_read(fp,(char*)buf, sizeof(buf));
5876 /* Accomodate broken VAXC compiler, which applies U8 cast to
5877 * both args of ?: operator, causing EOF to change into 255
5879 if (cnt) { i = (U8)buf[cnt - 1]; } else { i = EOF; }
5883 sv_catpvn(sv, (char *) buf, cnt);
5885 sv_setpvn(sv, (char *) buf, cnt);
5887 if (i != EOF && /* joy */
5889 SvCUR(sv) < rslen ||
5890 memNE(SvPVX(sv) + SvCUR(sv) - rslen, rsptr, rslen)))
5894 * If we're reading from a TTY and we get a short read,
5895 * indicating that the user hit his EOF character, we need
5896 * to notice it now, because if we try to read from the TTY
5897 * again, the EOF condition will disappear.
5899 * The comparison of cnt to sizeof(buf) is an optimization
5900 * that prevents unnecessary calls to feof().
5904 if (!(cnt < sizeof(buf) && PerlIO_eof(fp)))
5909 if (rspara) { /* have to do this both before and after */
5910 while (i != EOF) { /* to make sure file boundaries work right */
5911 i = PerlIO_getc(fp);
5913 PerlIO_ungetc(fp,i);
5919 if (PerlIO_isutf8(fp))
5924 return (SvCUR(sv) - append) ? SvPVX(sv) : Nullch;
5930 Auto-increment of the value in the SV, doing string to numeric conversion
5931 if necessary. Handles 'get' magic.
5937 Perl_sv_inc(pTHX_ register SV *sv)
5946 if (SvTHINKFIRST(sv)) {
5947 if (SvREADONLY(sv) && SvFAKE(sv))
5948 sv_force_normal(sv);
5949 if (SvREADONLY(sv)) {
5950 if (PL_curcop != &PL_compiling)
5951 Perl_croak(aTHX_ PL_no_modify);
5955 if (SvAMAGIC(sv) && AMG_CALLun(sv,inc))
5957 i = PTR2IV(SvRV(sv));
5962 flags = SvFLAGS(sv);
5963 if ((flags & (SVp_NOK|SVp_IOK)) == SVp_NOK) {
5964 /* It's (privately or publicly) a float, but not tested as an
5965 integer, so test it to see. */
5967 flags = SvFLAGS(sv);
5969 if ((flags & SVf_IOK) || ((flags & (SVp_IOK | SVp_NOK)) == SVp_IOK)) {
5970 /* It's publicly an integer, or privately an integer-not-float */
5971 #ifdef PERL_PRESERVE_IVUV
5975 if (SvUVX(sv) == UV_MAX)
5976 sv_setnv(sv, UV_MAX_P1);
5978 (void)SvIOK_only_UV(sv);
5981 if (SvIVX(sv) == IV_MAX)
5982 sv_setuv(sv, (UV)IV_MAX + 1);
5984 (void)SvIOK_only(sv);
5990 if (flags & SVp_NOK) {
5991 (void)SvNOK_only(sv);
5996 if (!(flags & SVp_POK) || !*SvPVX(sv)) {
5997 if ((flags & SVTYPEMASK) < SVt_PVIV)
5998 sv_upgrade(sv, SVt_IV);
5999 (void)SvIOK_only(sv);
6004 while (isALPHA(*d)) d++;
6005 while (isDIGIT(*d)) d++;
6007 #ifdef PERL_PRESERVE_IVUV
6008 /* Got to punt this as an integer if needs be, but we don't issue
6009 warnings. Probably ought to make the sv_iv_please() that does
6010 the conversion if possible, and silently. */
6011 int numtype = grok_number(SvPVX(sv), SvCUR(sv), NULL);
6012 if (numtype && !(numtype & IS_NUMBER_INFINITY)) {
6013 /* Need to try really hard to see if it's an integer.
6014 9.22337203685478e+18 is an integer.
6015 but "9.22337203685478e+18" + 0 is UV=9223372036854779904
6016 so $a="9.22337203685478e+18"; $a+0; $a++
6017 needs to be the same as $a="9.22337203685478e+18"; $a++
6024 /* sv_2iv *should* have made this an NV */
6025 if (flags & SVp_NOK) {
6026 (void)SvNOK_only(sv);
6030 /* I don't think we can get here. Maybe I should assert this
6031 And if we do get here I suspect that sv_setnv will croak. NWC
6033 #if defined(USE_LONG_DOUBLE)
6034 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",
6035 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
6037 DEBUG_c(PerlIO_printf(Perl_debug_log,"sv_inc punt failed to convert '%s' to IOK or NOKp, UV=0x%"UVxf" NV=%"NVgf"\n",
6038 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
6041 #endif /* PERL_PRESERVE_IVUV */
6042 sv_setnv(sv,Atof(SvPVX(sv)) + 1.0);
6046 while (d >= SvPVX(sv)) {
6054 /* MKS: The original code here died if letters weren't consecutive.
6055 * at least it didn't have to worry about non-C locales. The
6056 * new code assumes that ('z'-'a')==('Z'-'A'), letters are
6057 * arranged in order (although not consecutively) and that only
6058 * [A-Za-z] are accepted by isALPHA in the C locale.
6060 if (*d != 'z' && *d != 'Z') {
6061 do { ++*d; } while (!isALPHA(*d));
6064 *(d--) -= 'z' - 'a';
6069 *(d--) -= 'z' - 'a' + 1;
6073 /* oh,oh, the number grew */
6074 SvGROW(sv, SvCUR(sv) + 2);
6076 for (d = SvPVX(sv) + SvCUR(sv); d > SvPVX(sv); d--)
6087 Auto-decrement of the value in the SV, doing string to numeric conversion
6088 if necessary. Handles 'get' magic.
6094 Perl_sv_dec(pTHX_ register SV *sv)
6102 if (SvTHINKFIRST(sv)) {
6103 if (SvREADONLY(sv) && SvFAKE(sv))
6104 sv_force_normal(sv);
6105 if (SvREADONLY(sv)) {
6106 if (PL_curcop != &PL_compiling)
6107 Perl_croak(aTHX_ PL_no_modify);
6111 if (SvAMAGIC(sv) && AMG_CALLun(sv,dec))
6113 i = PTR2IV(SvRV(sv));
6118 /* Unlike sv_inc we don't have to worry about string-never-numbers
6119 and keeping them magic. But we mustn't warn on punting */
6120 flags = SvFLAGS(sv);
6121 if ((flags & SVf_IOK) || ((flags & (SVp_IOK | SVp_NOK)) == SVp_IOK)) {
6122 /* It's publicly an integer, or privately an integer-not-float */
6123 #ifdef PERL_PRESERVE_IVUV
6127 if (SvUVX(sv) == 0) {
6128 (void)SvIOK_only(sv);
6132 (void)SvIOK_only_UV(sv);
6136 if (SvIVX(sv) == IV_MIN)
6137 sv_setnv(sv, (NV)IV_MIN - 1.0);
6139 (void)SvIOK_only(sv);
6145 if (flags & SVp_NOK) {
6147 (void)SvNOK_only(sv);
6150 if (!(flags & SVp_POK)) {
6151 if ((flags & SVTYPEMASK) < SVt_PVNV)
6152 sv_upgrade(sv, SVt_NV);
6154 (void)SvNOK_only(sv);
6157 #ifdef PERL_PRESERVE_IVUV
6159 int numtype = grok_number(SvPVX(sv), SvCUR(sv), NULL);
6160 if (numtype && !(numtype & IS_NUMBER_INFINITY)) {
6161 /* Need to try really hard to see if it's an integer.
6162 9.22337203685478e+18 is an integer.
6163 but "9.22337203685478e+18" + 0 is UV=9223372036854779904
6164 so $a="9.22337203685478e+18"; $a+0; $a--
6165 needs to be the same as $a="9.22337203685478e+18"; $a--
6172 /* sv_2iv *should* have made this an NV */
6173 if (flags & SVp_NOK) {
6174 (void)SvNOK_only(sv);
6178 /* I don't think we can get here. Maybe I should assert this
6179 And if we do get here I suspect that sv_setnv will croak. NWC
6181 #if defined(USE_LONG_DOUBLE)
6182 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",
6183 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
6185 DEBUG_c(PerlIO_printf(Perl_debug_log,"sv_dec punt failed to convert '%s' to IOK or NOKp, UV=0x%"UVxf" NV=%"NVgf"\n",
6186 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
6190 #endif /* PERL_PRESERVE_IVUV */
6191 sv_setnv(sv,Atof(SvPVX(sv)) - 1.0); /* punt */
6195 =for apidoc sv_mortalcopy
6197 Creates a new SV which is a copy of the original SV (using C<sv_setsv>).
6198 The new SV is marked as mortal. It will be destroyed "soon", either by an
6199 explicit call to FREETMPS, or by an implicit call at places such as
6200 statement boundaries. See also C<sv_newmortal> and C<sv_2mortal>.
6205 /* Make a string that will exist for the duration of the expression
6206 * evaluation. Actually, it may have to last longer than that, but
6207 * hopefully we won't free it until it has been assigned to a
6208 * permanent location. */
6211 Perl_sv_mortalcopy(pTHX_ SV *oldstr)
6216 sv_setsv(sv,oldstr);
6218 PL_tmps_stack[++PL_tmps_ix] = sv;
6224 =for apidoc sv_newmortal
6226 Creates a new null SV which is mortal. The reference count of the SV is
6227 set to 1. It will be destroyed "soon", either by an explicit call to
6228 FREETMPS, or by an implicit call at places such as statement boundaries.
6229 See also C<sv_mortalcopy> and C<sv_2mortal>.
6235 Perl_sv_newmortal(pTHX)
6240 SvFLAGS(sv) = SVs_TEMP;
6242 PL_tmps_stack[++PL_tmps_ix] = sv;
6247 =for apidoc sv_2mortal
6249 Marks an existing SV as mortal. The SV will be destroyed "soon", either
6250 by an explicit call to FREETMPS, or by an implicit call at places such as
6251 statement boundaries. See also C<sv_newmortal> and C<sv_mortalcopy>.
6257 Perl_sv_2mortal(pTHX_ register SV *sv)
6261 if (SvREADONLY(sv) && SvIMMORTAL(sv))
6264 PL_tmps_stack[++PL_tmps_ix] = sv;
6272 Creates a new SV and copies a string into it. The reference count for the
6273 SV is set to 1. If C<len> is zero, Perl will compute the length using
6274 strlen(). For efficiency, consider using C<newSVpvn> instead.
6280 Perl_newSVpv(pTHX_ const char *s, STRLEN len)
6287 sv_setpvn(sv,s,len);
6292 =for apidoc newSVpvn
6294 Creates a new SV and copies a string into it. The reference count for the
6295 SV is set to 1. Note that if C<len> is zero, Perl will create a zero length
6296 string. You are responsible for ensuring that the source string is at least
6303 Perl_newSVpvn(pTHX_ const char *s, STRLEN len)
6308 sv_setpvn(sv,s,len);
6313 =for apidoc newSVpvn_share
6315 Creates a new SV with its SvPVX pointing to a shared string in the string
6316 table. If the string does not already exist in the table, it is created
6317 first. Turns on READONLY and FAKE. The string's hash is stored in the UV
6318 slot of the SV; if the C<hash> parameter is non-zero, that value is used;
6319 otherwise the hash is computed. The idea here is that as the string table
6320 is used for shared hash keys these strings will have SvPVX == HeKEY and
6321 hash lookup will avoid string compare.
6327 Perl_newSVpvn_share(pTHX_ const char *src, I32 len, U32 hash)
6330 bool is_utf8 = FALSE;
6332 STRLEN tmplen = -len;
6334 /* See the note in hv.c:hv_fetch() --jhi */
6335 src = (char*)bytes_from_utf8((U8*)src, &tmplen, &is_utf8);
6339 PERL_HASH(hash, src, len);
6341 sv_upgrade(sv, SVt_PVIV);
6342 SvPVX(sv) = sharepvn(src, is_utf8?-len:len, hash);
6355 #if defined(PERL_IMPLICIT_CONTEXT)
6357 /* pTHX_ magic can't cope with varargs, so this is a no-context
6358 * version of the main function, (which may itself be aliased to us).
6359 * Don't access this version directly.
6363 Perl_newSVpvf_nocontext(const char* pat, ...)
6368 va_start(args, pat);
6369 sv = vnewSVpvf(pat, &args);
6376 =for apidoc newSVpvf
6378 Creates a new SV and initializes it with the string formatted like
6385 Perl_newSVpvf(pTHX_ const char* pat, ...)
6389 va_start(args, pat);
6390 sv = vnewSVpvf(pat, &args);
6395 /* backend for newSVpvf() and newSVpvf_nocontext() */
6398 Perl_vnewSVpvf(pTHX_ const char* pat, va_list* args)
6402 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
6409 Creates a new SV and copies a floating point value into it.
6410 The reference count for the SV is set to 1.
6416 Perl_newSVnv(pTHX_ NV n)
6428 Creates a new SV and copies an integer into it. The reference count for the
6435 Perl_newSViv(pTHX_ IV i)
6447 Creates a new SV and copies an unsigned integer into it.
6448 The reference count for the SV is set to 1.
6454 Perl_newSVuv(pTHX_ UV u)
6464 =for apidoc newRV_noinc
6466 Creates an RV wrapper for an SV. The reference count for the original
6467 SV is B<not> incremented.
6473 Perl_newRV_noinc(pTHX_ SV *tmpRef)
6478 sv_upgrade(sv, SVt_RV);
6485 /* newRV_inc is the official function name to use now.
6486 * newRV_inc is in fact #defined to newRV in sv.h
6490 Perl_newRV(pTHX_ SV *tmpRef)
6492 return newRV_noinc(SvREFCNT_inc(tmpRef));
6498 Creates a new SV which is an exact duplicate of the original SV.
6505 Perl_newSVsv(pTHX_ register SV *old)
6511 if (SvTYPE(old) == SVTYPEMASK) {
6512 if (ckWARN_d(WARN_INTERNAL))
6513 Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "semi-panic: attempt to dup freed string");
6528 =for apidoc sv_reset
6530 Underlying implementation for the C<reset> Perl function.
6531 Note that the perl-level function is vaguely deprecated.
6537 Perl_sv_reset(pTHX_ register char *s, HV *stash)
6545 char todo[PERL_UCHAR_MAX+1];
6550 if (!*s) { /* reset ?? searches */
6551 for (pm = HvPMROOT(stash); pm; pm = pm->op_pmnext) {
6552 pm->op_pmdynflags &= ~PMdf_USED;
6557 /* reset variables */
6559 if (!HvARRAY(stash))
6562 Zero(todo, 256, char);
6564 i = (unsigned char)*s;
6568 max = (unsigned char)*s++;
6569 for ( ; i <= max; i++) {
6572 for (i = 0; i <= (I32) HvMAX(stash); i++) {
6573 for (entry = HvARRAY(stash)[i];
6575 entry = HeNEXT(entry))
6577 if (!todo[(U8)*HeKEY(entry)])
6579 gv = (GV*)HeVAL(entry);
6581 if (SvTHINKFIRST(sv)) {
6582 if (!SvREADONLY(sv) && SvROK(sv))
6587 if (SvTYPE(sv) >= SVt_PV) {
6589 if (SvPVX(sv) != Nullch)
6596 if (GvHV(gv) && !HvNAME(GvHV(gv))) {
6598 #ifdef USE_ENVIRON_ARRAY
6600 # ifdef USE_ITHREADS
6601 && PL_curinterp == aTHX
6605 environ[0] = Nullch;
6617 Using various gambits, try to get an IO from an SV: the IO slot if its a
6618 GV; or the recursive result if we're an RV; or the IO slot of the symbol
6619 named after the PV if we're a string.
6625 Perl_sv_2io(pTHX_ SV *sv)
6631 switch (SvTYPE(sv)) {
6639 Perl_croak(aTHX_ "Bad filehandle: %s", GvNAME(gv));
6643 Perl_croak(aTHX_ PL_no_usym, "filehandle");
6645 return sv_2io(SvRV(sv));
6646 gv = gv_fetchpv(SvPV(sv,n_a), FALSE, SVt_PVIO);
6652 Perl_croak(aTHX_ "Bad filehandle: %s", SvPV(sv,n_a));
6661 Using various gambits, try to get a CV from an SV; in addition, try if
6662 possible to set C<*st> and C<*gvp> to the stash and GV associated with it.
6668 Perl_sv_2cv(pTHX_ SV *sv, HV **st, GV **gvp, I32 lref)
6675 return *gvp = Nullgv, Nullcv;
6676 switch (SvTYPE(sv)) {
6695 SV **sp = &sv; /* Used in tryAMAGICunDEREF macro. */
6696 tryAMAGICunDEREF(to_cv);
6699 if (SvTYPE(sv) == SVt_PVCV) {
6708 Perl_croak(aTHX_ "Not a subroutine reference");
6713 gv = gv_fetchpv(SvPV(sv, n_a), lref, SVt_PVCV);
6719 if (lref && !GvCVu(gv)) {
6722 tmpsv = NEWSV(704,0);
6723 gv_efullname3(tmpsv, gv, Nullch);
6724 /* XXX this is probably not what they think they're getting.
6725 * It has the same effect as "sub name;", i.e. just a forward
6727 newSUB(start_subparse(FALSE, 0),
6728 newSVOP(OP_CONST, 0, tmpsv),
6733 Perl_croak(aTHX_ "Unable to create sub named \"%s\"", SvPV(sv,n_a));
6742 Returns true if the SV has a true value by Perl's rules.
6743 Use the C<SvTRUE> macro instead, which may call C<sv_true()> or may
6744 instead use an in-line version.
6750 Perl_sv_true(pTHX_ register SV *sv)
6756 if ((tXpv = (XPV*)SvANY(sv)) &&
6757 (tXpv->xpv_cur > 1 ||
6758 (tXpv->xpv_cur && *tXpv->xpv_pv != '0')))
6765 return SvIVX(sv) != 0;
6768 return SvNVX(sv) != 0.0;
6770 return sv_2bool(sv);
6778 A private implementation of the C<SvIVx> macro for compilers which can't
6779 cope with complex macro expressions. Always use the macro instead.
6785 Perl_sv_iv(pTHX_ register SV *sv)
6789 return (IV)SvUVX(sv);
6798 A private implementation of the C<SvUVx> macro for compilers which can't
6799 cope with complex macro expressions. Always use the macro instead.
6805 Perl_sv_uv(pTHX_ register SV *sv)
6810 return (UV)SvIVX(sv);
6818 A private implementation of the C<SvNVx> macro for compilers which can't
6819 cope with complex macro expressions. Always use the macro instead.
6825 Perl_sv_nv(pTHX_ register SV *sv)
6835 Use the C<SvPV_nolen> macro instead
6839 A private implementation of the C<SvPV> macro for compilers which can't
6840 cope with complex macro expressions. Always use the macro instead.
6846 Perl_sv_pvn(pTHX_ SV *sv, STRLEN *lp)
6852 return sv_2pv(sv, lp);
6857 Perl_sv_pvn_nomg(pTHX_ register SV *sv, STRLEN *lp)
6863 return sv_2pv_flags(sv, lp, 0);
6867 =for apidoc sv_pvn_force
6869 Get a sensible string out of the SV somehow.
6870 A private implementation of the C<SvPV_force> macro for compilers which
6871 can't cope with complex macro expressions. Always use the macro instead.
6873 =for apidoc sv_pvn_force_flags
6875 Get a sensible string out of the SV somehow.
6876 If C<flags> has C<SV_GMAGIC> bit set, will C<mg_get> on C<sv> if
6877 appropriate, else not. C<sv_pvn_force> and C<sv_pvn_force_nomg> are
6878 implemented in terms of this function.
6879 You normally want to use the various wrapper macros instead: see
6880 C<SvPV_force> and C<SvPV_force_nomg>
6886 Perl_sv_pvn_force_flags(pTHX_ SV *sv, STRLEN *lp, I32 flags)
6890 if (SvTHINKFIRST(sv) && !SvROK(sv))
6891 sv_force_normal(sv);
6897 if (SvTYPE(sv) > SVt_PVLV && SvTYPE(sv) != SVt_PVFM) {
6898 Perl_croak(aTHX_ "Can't coerce %s to string in %s", sv_reftype(sv,0),
6902 s = sv_2pv_flags(sv, lp, flags);
6903 if (s != SvPVX(sv)) { /* Almost, but not quite, sv_setpvn() */
6908 (void)SvUPGRADE(sv, SVt_PV); /* Never FALSE */
6909 SvGROW(sv, len + 1);
6910 Move(s,SvPVX(sv),len,char);
6915 SvPOK_on(sv); /* validate pointer */
6917 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2pv(%s)\n",
6918 PTR2UV(sv),SvPVX(sv)));
6925 =for apidoc sv_pvbyte
6927 Use C<SvPVbyte_nolen> instead.
6929 =for apidoc sv_pvbyten
6931 A private implementation of the C<SvPVbyte> macro for compilers
6932 which can't cope with complex macro expressions. Always use the macro
6939 Perl_sv_pvbyten(pTHX_ SV *sv, STRLEN *lp)
6941 sv_utf8_downgrade(sv,0);
6942 return sv_pvn(sv,lp);
6946 =for apidoc sv_pvbyten_force
6948 A private implementation of the C<SvPVbytex_force> macro for compilers
6949 which can't cope with complex macro expressions. Always use the macro
6956 Perl_sv_pvbyten_force(pTHX_ SV *sv, STRLEN *lp)
6958 sv_utf8_downgrade(sv,0);
6959 return sv_pvn_force(sv,lp);
6963 =for apidoc sv_pvutf8
6965 Use the C<SvPVutf8_nolen> macro instead
6967 =for apidoc sv_pvutf8n
6969 A private implementation of the C<SvPVutf8> macro for compilers
6970 which can't cope with complex macro expressions. Always use the macro
6977 Perl_sv_pvutf8n(pTHX_ SV *sv, STRLEN *lp)
6979 sv_utf8_upgrade(sv);
6980 return sv_pvn(sv,lp);
6984 =for apidoc sv_pvutf8n_force
6986 A private implementation of the C<SvPVutf8_force> macro for compilers
6987 which can't cope with complex macro expressions. Always use the macro
6994 Perl_sv_pvutf8n_force(pTHX_ SV *sv, STRLEN *lp)
6996 sv_utf8_upgrade(sv);
6997 return sv_pvn_force(sv,lp);
7001 =for apidoc sv_reftype
7003 Returns a string describing what the SV is a reference to.
7009 Perl_sv_reftype(pTHX_ SV *sv, int ob)
7011 if (ob && SvOBJECT(sv)) {
7012 HV *svs = SvSTASH(sv);
7013 /* [20011101.072] This bandaid for C<package;> should eventually
7014 be removed. AMS 20011103 */
7015 return (svs ? HvNAME(svs) : "<none>");
7018 switch (SvTYPE(sv)) {
7032 case SVt_PVLV: return "LVALUE";
7033 case SVt_PVAV: return "ARRAY";
7034 case SVt_PVHV: return "HASH";
7035 case SVt_PVCV: return "CODE";
7036 case SVt_PVGV: return "GLOB";
7037 case SVt_PVFM: return "FORMAT";
7038 case SVt_PVIO: return "IO";
7039 default: return "UNKNOWN";
7045 =for apidoc sv_isobject
7047 Returns a boolean indicating whether the SV is an RV pointing to a blessed
7048 object. If the SV is not an RV, or if the object is not blessed, then this
7055 Perl_sv_isobject(pTHX_ SV *sv)
7072 Returns a boolean indicating whether the SV is blessed into the specified
7073 class. This does not check for subtypes; use C<sv_derived_from> to verify
7074 an inheritance relationship.
7080 Perl_sv_isa(pTHX_ SV *sv, const char *name)
7092 return strEQ(HvNAME(SvSTASH(sv)), name);
7098 Creates a new SV for the RV, C<rv>, to point to. If C<rv> is not an RV then
7099 it will be upgraded to one. If C<classname> is non-null then the new SV will
7100 be blessed in the specified package. The new SV is returned and its
7101 reference count is 1.
7107 Perl_newSVrv(pTHX_ SV *rv, const char *classname)
7113 SV_CHECK_THINKFIRST(rv);
7116 if (SvTYPE(rv) >= SVt_PVMG) {
7117 U32 refcnt = SvREFCNT(rv);
7121 SvREFCNT(rv) = refcnt;
7124 if (SvTYPE(rv) < SVt_RV)
7125 sv_upgrade(rv, SVt_RV);
7126 else if (SvTYPE(rv) > SVt_RV) {
7127 (void)SvOOK_off(rv);
7128 if (SvPVX(rv) && SvLEN(rv))
7129 Safefree(SvPVX(rv));
7139 HV* stash = gv_stashpv(classname, TRUE);
7140 (void)sv_bless(rv, stash);
7146 =for apidoc sv_setref_pv
7148 Copies a pointer into a new SV, optionally blessing the SV. The C<rv>
7149 argument will be upgraded to an RV. That RV will be modified to point to
7150 the new SV. If the C<pv> argument is NULL then C<PL_sv_undef> will be placed
7151 into the SV. The C<classname> argument indicates the package for the
7152 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
7153 will be returned and will have a reference count of 1.
7155 Do not use with other Perl types such as HV, AV, SV, CV, because those
7156 objects will become corrupted by the pointer copy process.
7158 Note that C<sv_setref_pvn> copies the string while this copies the pointer.
7164 Perl_sv_setref_pv(pTHX_ SV *rv, const char *classname, void *pv)
7167 sv_setsv(rv, &PL_sv_undef);
7171 sv_setiv(newSVrv(rv,classname), PTR2IV(pv));
7176 =for apidoc sv_setref_iv
7178 Copies an integer into a new SV, optionally blessing the SV. The C<rv>
7179 argument will be upgraded to an RV. That RV will be modified to point to
7180 the new SV. The C<classname> argument indicates the package for the
7181 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
7182 will be returned and will have a reference count of 1.
7188 Perl_sv_setref_iv(pTHX_ SV *rv, const char *classname, IV iv)
7190 sv_setiv(newSVrv(rv,classname), iv);
7195 =for apidoc sv_setref_uv
7197 Copies an unsigned integer into a new SV, optionally blessing the SV. The C<rv>
7198 argument will be upgraded to an RV. That RV will be modified to point to
7199 the new SV. The C<classname> argument indicates the package for the
7200 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
7201 will be returned and will have a reference count of 1.
7207 Perl_sv_setref_uv(pTHX_ SV *rv, const char *classname, UV uv)
7209 sv_setuv(newSVrv(rv,classname), uv);
7214 =for apidoc sv_setref_nv
7216 Copies a double into a new SV, optionally blessing the SV. The C<rv>
7217 argument will be upgraded to an RV. That RV will be modified to point to
7218 the new SV. The C<classname> argument indicates the package for the
7219 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
7220 will be returned and will have a reference count of 1.
7226 Perl_sv_setref_nv(pTHX_ SV *rv, const char *classname, NV nv)
7228 sv_setnv(newSVrv(rv,classname), nv);
7233 =for apidoc sv_setref_pvn
7235 Copies a string into a new SV, optionally blessing the SV. The length of the
7236 string must be specified with C<n>. The C<rv> argument will be upgraded to
7237 an RV. That RV will be modified to point to the new SV. The C<classname>
7238 argument indicates the package for the blessing. Set C<classname> to
7239 C<Nullch> to avoid the blessing. The new SV will be returned and will have
7240 a reference count of 1.
7242 Note that C<sv_setref_pv> copies the pointer while this copies the string.
7248 Perl_sv_setref_pvn(pTHX_ SV *rv, const char *classname, char *pv, STRLEN n)
7250 sv_setpvn(newSVrv(rv,classname), pv, n);
7255 =for apidoc sv_bless
7257 Blesses an SV into a specified package. The SV must be an RV. The package
7258 must be designated by its stash (see C<gv_stashpv()>). The reference count
7259 of the SV is unaffected.
7265 Perl_sv_bless(pTHX_ SV *sv, HV *stash)
7269 Perl_croak(aTHX_ "Can't bless non-reference value");
7271 if (SvFLAGS(tmpRef) & (SVs_OBJECT|SVf_READONLY)) {
7272 if (SvREADONLY(tmpRef))
7273 Perl_croak(aTHX_ PL_no_modify);
7274 if (SvOBJECT(tmpRef)) {
7275 if (SvTYPE(tmpRef) != SVt_PVIO)
7277 SvREFCNT_dec(SvSTASH(tmpRef));
7280 SvOBJECT_on(tmpRef);
7281 if (SvTYPE(tmpRef) != SVt_PVIO)
7283 (void)SvUPGRADE(tmpRef, SVt_PVMG);
7284 SvSTASH(tmpRef) = (HV*)SvREFCNT_inc(stash);
7291 if(SvSMAGICAL(tmpRef))
7292 if(mg_find(tmpRef, PERL_MAGIC_ext) || mg_find(tmpRef, PERL_MAGIC_uvar))
7300 /* Downgrades a PVGV to a PVMG.
7304 S_sv_unglob(pTHX_ SV *sv)
7308 assert(SvTYPE(sv) == SVt_PVGV);
7313 SvREFCNT_dec(GvSTASH(sv));
7314 GvSTASH(sv) = Nullhv;
7316 sv_unmagic(sv, PERL_MAGIC_glob);
7317 Safefree(GvNAME(sv));
7320 /* need to keep SvANY(sv) in the right arena */
7321 xpvmg = new_XPVMG();
7322 StructCopy(SvANY(sv), xpvmg, XPVMG);
7323 del_XPVGV(SvANY(sv));
7326 SvFLAGS(sv) &= ~SVTYPEMASK;
7327 SvFLAGS(sv) |= SVt_PVMG;
7331 =for apidoc sv_unref_flags
7333 Unsets the RV status of the SV, and decrements the reference count of
7334 whatever was being referenced by the RV. This can almost be thought of
7335 as a reversal of C<newSVrv>. The C<cflags> argument can contain
7336 C<SV_IMMEDIATE_UNREF> to force the reference count to be decremented
7337 (otherwise the decrementing is conditional on the reference count being
7338 different from one or the reference being a readonly SV).
7345 Perl_sv_unref_flags(pTHX_ SV *sv, U32 flags)
7349 if (SvWEAKREF(sv)) {
7357 if (SvREFCNT(rv) != 1 || SvREADONLY(rv) || flags) /* SV_IMMEDIATE_UNREF */
7359 else /* XXX Hack, but hard to make $a=$a->[1] work otherwise */
7360 sv_2mortal(rv); /* Schedule for freeing later */
7364 =for apidoc sv_unref
7366 Unsets the RV status of the SV, and decrements the reference count of
7367 whatever was being referenced by the RV. This can almost be thought of
7368 as a reversal of C<newSVrv>. This is C<sv_unref_flags> with the C<flag>
7369 being zero. See C<SvROK_off>.
7375 Perl_sv_unref(pTHX_ SV *sv)
7377 sv_unref_flags(sv, 0);
7381 =for apidoc sv_taint
7383 Taint an SV. Use C<SvTAINTED_on> instead.
7388 Perl_sv_taint(pTHX_ SV *sv)
7390 sv_magic((sv), Nullsv, PERL_MAGIC_taint, Nullch, 0);
7394 =for apidoc sv_untaint
7396 Untaint an SV. Use C<SvTAINTED_off> instead.
7401 Perl_sv_untaint(pTHX_ SV *sv)
7403 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) {
7404 MAGIC *mg = mg_find(sv, PERL_MAGIC_taint);
7411 =for apidoc sv_tainted
7413 Test an SV for taintedness. Use C<SvTAINTED> instead.
7418 Perl_sv_tainted(pTHX_ SV *sv)
7420 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) {
7421 MAGIC *mg = mg_find(sv, PERL_MAGIC_taint);
7422 if (mg && ((mg->mg_len & 1) || ((mg->mg_len & 2) && mg->mg_obj == sv)))
7428 #if defined(PERL_IMPLICIT_CONTEXT)
7430 /* pTHX_ magic can't cope with varargs, so this is a no-context
7431 * version of the main function, (which may itself be aliased to us).
7432 * Don't access this version directly.
7436 Perl_sv_setpvf_nocontext(SV *sv, const char* pat, ...)
7440 va_start(args, pat);
7441 sv_vsetpvf(sv, pat, &args);
7445 /* pTHX_ magic can't cope with varargs, so this is a no-context
7446 * version of the main function, (which may itself be aliased to us).
7447 * Don't access this version directly.
7451 Perl_sv_setpvf_mg_nocontext(SV *sv, const char* pat, ...)
7455 va_start(args, pat);
7456 sv_vsetpvf_mg(sv, pat, &args);
7462 =for apidoc sv_setpvf
7464 Processes its arguments like C<sprintf> and sets an SV to the formatted
7465 output. Does not handle 'set' magic. See C<sv_setpvf_mg>.
7471 Perl_sv_setpvf(pTHX_ SV *sv, const char* pat, ...)
7474 va_start(args, pat);
7475 sv_vsetpvf(sv, pat, &args);
7479 /* backend for C<sv_setpvf> and C<sv_setpvf_nocontext> */
7482 Perl_sv_vsetpvf(pTHX_ SV *sv, const char* pat, va_list* args)
7484 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
7488 =for apidoc sv_setpvf_mg
7490 Like C<sv_setpvf>, but also handles 'set' magic.
7496 Perl_sv_setpvf_mg(pTHX_ SV *sv, const char* pat, ...)
7499 va_start(args, pat);
7500 sv_vsetpvf_mg(sv, pat, &args);
7504 /* backend for C<sv_setpvf_mg> C<setpvf_mg_nocontext> */
7507 Perl_sv_vsetpvf_mg(pTHX_ SV *sv, const char* pat, va_list* args)
7509 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
7513 #if defined(PERL_IMPLICIT_CONTEXT)
7515 /* pTHX_ magic can't cope with varargs, so this is a no-context
7516 * version of the main function, (which may itself be aliased to us).
7517 * Don't access this version directly.
7521 Perl_sv_catpvf_nocontext(SV *sv, const char* pat, ...)
7525 va_start(args, pat);
7526 sv_vcatpvf(sv, pat, &args);
7530 /* pTHX_ magic can't cope with varargs, so this is a no-context
7531 * version of the main function, (which may itself be aliased to us).
7532 * Don't access this version directly.
7536 Perl_sv_catpvf_mg_nocontext(SV *sv, const char* pat, ...)
7540 va_start(args, pat);
7541 sv_vcatpvf_mg(sv, pat, &args);
7547 =for apidoc sv_catpvf
7549 Processes its arguments like C<sprintf> and appends the formatted
7550 output to an SV. If the appended data contains "wide" characters
7551 (including, but not limited to, SVs with a UTF-8 PV formatted with %s,
7552 and characters >255 formatted with %c), the original SV might get
7553 upgraded to UTF-8. Handles 'get' magic, but not 'set' magic.
7554 C<SvSETMAGIC()> must typically be called after calling this function
7555 to handle 'set' magic.
7560 Perl_sv_catpvf(pTHX_ SV *sv, const char* pat, ...)
7563 va_start(args, pat);
7564 sv_vcatpvf(sv, pat, &args);
7568 /* backend for C<sv_catpvf> and C<catpvf_mg_nocontext> */
7571 Perl_sv_vcatpvf(pTHX_ SV *sv, const char* pat, va_list* args)
7573 sv_vcatpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
7577 =for apidoc sv_catpvf_mg
7579 Like C<sv_catpvf>, but also handles 'set' magic.
7585 Perl_sv_catpvf_mg(pTHX_ SV *sv, const char* pat, ...)
7588 va_start(args, pat);
7589 sv_vcatpvf_mg(sv, pat, &args);
7593 /* backend for C<catpvf_mg> and C<catpvf_mg_nocontext> */
7596 Perl_sv_vcatpvf_mg(pTHX_ SV *sv, const char* pat, va_list* args)
7598 sv_vcatpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
7603 =for apidoc sv_vsetpvfn
7605 Works like C<vcatpvfn> but copies the text into the SV instead of
7608 Usually used via one of its frontends C<sv_setpvf> and C<sv_setpvf_mg>.
7614 Perl_sv_vsetpvfn(pTHX_ SV *sv, const char *pat, STRLEN patlen, va_list *args, SV **svargs, I32 svmax, bool *maybe_tainted)
7616 sv_setpvn(sv, "", 0);
7617 sv_vcatpvfn(sv, pat, patlen, args, svargs, svmax, maybe_tainted);
7620 /* private function for use in sv_vcatpvfn via the EXPECT_NUMBER macro */
7623 S_expect_number(pTHX_ char** pattern)
7626 switch (**pattern) {
7627 case '1': case '2': case '3':
7628 case '4': case '5': case '6':
7629 case '7': case '8': case '9':
7630 while (isDIGIT(**pattern))
7631 var = var * 10 + (*(*pattern)++ - '0');
7635 #define EXPECT_NUMBER(pattern, var) (var = S_expect_number(aTHX_ &pattern))
7638 =for apidoc sv_vcatpvfn
7640 Processes its arguments like C<vsprintf> and appends the formatted output
7641 to an SV. Uses an array of SVs if the C style variable argument list is
7642 missing (NULL). When running with taint checks enabled, indicates via
7643 C<maybe_tainted> if results are untrustworthy (often due to the use of
7646 Usually used via one of its frontends C<sv_catpvf> and C<sv_catpvf_mg>.
7652 Perl_sv_vcatpvfn(pTHX_ SV *sv, const char *pat, STRLEN patlen, va_list *args, SV **svargs, I32 svmax, bool *maybe_tainted)
7659 static char nullstr[] = "(null)";
7661 bool has_utf8 = FALSE; /* has the result utf8? */
7663 /* no matter what, this is a string now */
7664 (void)SvPV_force(sv, origlen);
7666 /* special-case "", "%s", and "%_" */
7669 if (patlen == 2 && pat[0] == '%') {
7673 char *s = va_arg(*args, char*);
7674 sv_catpv(sv, s ? s : nullstr);
7676 else if (svix < svmax) {
7677 sv_catsv(sv, *svargs);
7678 if (DO_UTF8(*svargs))
7684 argsv = va_arg(*args, SV*);
7685 sv_catsv(sv, argsv);
7690 /* See comment on '_' below */
7695 if (!args && svix < svmax && DO_UTF8(*svargs))
7698 patend = (char*)pat + patlen;
7699 for (p = (char*)pat; p < patend; p = q) {
7702 bool vectorize = FALSE;
7703 bool vectorarg = FALSE;
7704 bool vec_utf8 = FALSE;
7710 bool has_precis = FALSE;
7712 bool is_utf8 = FALSE; /* is this item utf8? */
7715 U8 utf8buf[UTF8_MAXLEN+1];
7716 STRLEN esignlen = 0;
7718 char *eptr = Nullch;
7720 /* Times 4: a decimal digit takes more than 3 binary digits.
7721 * NV_DIG: mantissa takes than many decimal digits.
7722 * Plus 32: Playing safe. */
7723 char ebuf[IV_DIG * 4 + NV_DIG + 32];
7724 /* large enough for "%#.#f" --chip */
7725 /* what about long double NVs? --jhi */
7728 U8 *vecstr = Null(U8*);
7740 STRLEN dotstrlen = 1;
7741 I32 efix = 0; /* explicit format parameter index */
7742 I32 ewix = 0; /* explicit width index */
7743 I32 epix = 0; /* explicit precision index */
7744 I32 evix = 0; /* explicit vector index */
7745 bool asterisk = FALSE;
7747 /* echo everything up to the next format specification */
7748 for (q = p; q < patend && *q != '%'; ++q) ;
7750 sv_catpvn(sv, p, q - p);
7757 We allow format specification elements in this order:
7758 \d+\$ explicit format parameter index
7760 \*?(\d+\$)?v vector with optional (optionally specified) arg
7761 \d+|\*(\d+\$)? width using optional (optionally specified) arg
7762 \.(\d*|\*(\d+\$)?) precision using optional (optionally specified) arg
7764 [%bcdefginopsux_DFOUX] format (mandatory)
7766 if (EXPECT_NUMBER(q, width)) {
7807 if (EXPECT_NUMBER(q, ewix))
7816 if ((vectorarg = asterisk)) {
7826 EXPECT_NUMBER(q, width);
7831 vecsv = va_arg(*args, SV*);
7833 vecsv = (evix ? evix <= svmax : svix < svmax) ?
7834 svargs[ewix ? ewix-1 : svix++] : &PL_sv_undef;
7835 dotstr = SvPVx(vecsv, dotstrlen);
7840 vecsv = va_arg(*args, SV*);
7841 vecstr = (U8*)SvPVx(vecsv,veclen);
7842 vec_utf8 = DO_UTF8(vecsv);
7844 else if (efix ? efix <= svmax : svix < svmax) {
7845 vecsv = svargs[efix ? efix-1 : svix++];
7846 vecstr = (U8*)SvPVx(vecsv,veclen);
7847 vec_utf8 = DO_UTF8(vecsv);
7857 i = va_arg(*args, int);
7859 i = (ewix ? ewix <= svmax : svix < svmax) ?
7860 SvIVx(svargs[ewix ? ewix-1 : svix++]) : 0;
7862 width = (i < 0) ? -i : i;
7872 if (EXPECT_NUMBER(q, epix) && *q++ != '$') /* epix currently unused */
7875 i = va_arg(*args, int);
7877 i = (ewix ? ewix <= svmax : svix < svmax)
7878 ? SvIVx(svargs[ewix ? ewix-1 : svix++]) : 0;
7879 precis = (i < 0) ? 0 : i;
7884 precis = precis * 10 + (*q++ - '0');
7893 case 'I': /* Ix, I32x, and I64x */
7895 if (q[1] == '6' && q[2] == '4') {
7901 if (q[1] == '3' && q[2] == '2') {
7911 #if defined(HAS_QUAD) || (defined(HAS_LONG_DOUBLE) && defined(USE_LONG_DOUBLE))
7922 #if defined(HAS_QUAD) || (defined(HAS_LONG_DOUBLE) && defined(USE_LONG_DOUBLE))
7923 if (*(q + 1) == 'l') { /* lld, llf */
7946 argsv = (efix ? efix <= svmax : svix < svmax) ?
7947 svargs[efix ? efix-1 : svix++] : &PL_sv_undef;
7954 uv = args ? va_arg(*args, int) : SvIVx(argsv);
7956 (!UNI_IS_INVARIANT(uv) && SvUTF8(sv)))
7958 eptr = (char*)utf8buf;
7959 elen = uvchr_to_utf8((U8*)eptr, uv) - utf8buf;
7971 eptr = va_arg(*args, char*);
7973 #ifdef MACOS_TRADITIONAL
7974 /* On MacOS, %#s format is used for Pascal strings */
7979 elen = strlen(eptr);
7982 elen = sizeof nullstr - 1;
7986 eptr = SvPVx(argsv, elen);
7987 if (DO_UTF8(argsv)) {
7988 if (has_precis && precis < elen) {
7990 sv_pos_u2b(argsv, &p, 0); /* sticks at end */
7993 if (width) { /* fudge width (can't fudge elen) */
7994 width += elen - sv_len_utf8(argsv);
8003 * The "%_" hack might have to be changed someday,
8004 * if ISO or ANSI decide to use '_' for something.
8005 * So we keep it hidden from users' code.
8009 argsv = va_arg(*args, SV*);
8010 eptr = SvPVx(argsv, elen);
8016 if (has_precis && elen > precis)
8025 uv = PTR2UV(args ? va_arg(*args, void*) : argsv);
8043 uv = utf8n_to_uvchr(vecstr, veclen, &ulen,
8052 esignbuf[esignlen++] = plus;
8056 case 'h': iv = (short)va_arg(*args, int); break;
8057 default: iv = va_arg(*args, int); break;
8058 case 'l': iv = va_arg(*args, long); break;
8059 case 'V': iv = va_arg(*args, IV); break;
8061 case 'q': iv = va_arg(*args, Quad_t); break;
8068 case 'h': iv = (short)iv; break;
8070 case 'l': iv = (long)iv; break;
8073 case 'q': iv = (Quad_t)iv; break;
8077 if ( !vectorize ) /* we already set uv above */
8082 esignbuf[esignlen++] = plus;
8086 esignbuf[esignlen++] = '-';
8129 uv = utf8n_to_uvchr(vecstr, veclen, &ulen,
8140 case 'h': uv = (unsigned short)va_arg(*args, unsigned); break;
8141 default: uv = va_arg(*args, unsigned); break;
8142 case 'l': uv = va_arg(*args, unsigned long); break;
8143 case 'V': uv = va_arg(*args, UV); break;
8145 case 'q': uv = va_arg(*args, Quad_t); break;
8152 case 'h': uv = (unsigned short)uv; break;
8154 case 'l': uv = (unsigned long)uv; break;
8157 case 'q': uv = (Quad_t)uv; break;
8163 eptr = ebuf + sizeof ebuf;
8169 p = (char*)((c == 'X')
8170 ? "0123456789ABCDEF" : "0123456789abcdef");
8176 esignbuf[esignlen++] = '0';
8177 esignbuf[esignlen++] = c; /* 'x' or 'X' */
8183 *--eptr = '0' + dig;
8185 if (alt && *eptr != '0')
8191 *--eptr = '0' + dig;
8194 esignbuf[esignlen++] = '0';
8195 esignbuf[esignlen++] = 'b';
8198 default: /* it had better be ten or less */
8199 #if defined(PERL_Y2KWARN)
8200 if (ckWARN(WARN_Y2K)) {
8202 char *s = SvPV(sv,n);
8203 if (n >= 2 && s[n-2] == '1' && s[n-1] == '9'
8204 && (n == 2 || !isDIGIT(s[n-3])))
8206 Perl_warner(aTHX_ packWARN(WARN_Y2K),
8207 "Possible Y2K bug: %%%c %s",
8208 c, "format string following '19'");
8214 *--eptr = '0' + dig;
8215 } while (uv /= base);
8218 elen = (ebuf + sizeof ebuf) - eptr;
8221 zeros = precis - elen;
8222 else if (precis == 0 && elen == 1 && *eptr == '0')
8227 /* FLOATING POINT */
8230 c = 'f'; /* maybe %F isn't supported here */
8236 /* This is evil, but floating point is even more evil */
8239 nv = args ? va_arg(*args, NV) : SvNVx(argsv);
8242 if (c != 'e' && c != 'E') {
8244 (void)Perl_frexp(nv, &i);
8245 if (i == PERL_INT_MIN)
8246 Perl_die(aTHX_ "panic: frexp");
8248 need = BIT_DIGITS(i);
8250 need += has_precis ? precis : 6; /* known default */
8254 need += 20; /* fudge factor */
8255 if (PL_efloatsize < need) {
8256 Safefree(PL_efloatbuf);
8257 PL_efloatsize = need + 20; /* more fudge */
8258 New(906, PL_efloatbuf, PL_efloatsize, char);
8259 PL_efloatbuf[0] = '\0';
8262 eptr = ebuf + sizeof ebuf;
8265 #if defined(USE_LONG_DOUBLE) && defined(PERL_PRIfldbl)
8267 /* Copy the one or more characters in a long double
8268 * format before the 'base' ([efgEFG]) character to
8269 * the format string. */
8270 static char const prifldbl[] = PERL_PRIfldbl;
8271 char const *p = prifldbl + sizeof(prifldbl) - 3;
8272 while (p >= prifldbl) { *--eptr = *p--; }
8277 do { *--eptr = '0' + (base % 10); } while (base /= 10);
8282 do { *--eptr = '0' + (base % 10); } while (base /= 10);
8294 /* No taint. Otherwise we are in the strange situation
8295 * where printf() taints but print($float) doesn't.
8297 (void)sprintf(PL_efloatbuf, eptr, nv);
8299 eptr = PL_efloatbuf;
8300 elen = strlen(PL_efloatbuf);
8307 i = SvCUR(sv) - origlen;
8310 case 'h': *(va_arg(*args, short*)) = i; break;
8311 default: *(va_arg(*args, int*)) = i; break;
8312 case 'l': *(va_arg(*args, long*)) = i; break;
8313 case 'V': *(va_arg(*args, IV*)) = i; break;
8315 case 'q': *(va_arg(*args, Quad_t*)) = i; break;
8320 sv_setuv_mg(argsv, (UV)i);
8321 continue; /* not "break" */
8328 if (!args && ckWARN(WARN_PRINTF) &&
8329 (PL_op->op_type == OP_PRTF || PL_op->op_type == OP_SPRINTF)) {
8330 SV *msg = sv_newmortal();
8331 Perl_sv_setpvf(aTHX_ msg, "Invalid conversion in %s: ",
8332 (PL_op->op_type == OP_PRTF) ? "printf" : "sprintf");
8335 Perl_sv_catpvf(aTHX_ msg,
8336 "\"%%%c\"", c & 0xFF);
8338 Perl_sv_catpvf(aTHX_ msg,
8339 "\"%%\\%03"UVof"\"",
8342 sv_catpv(msg, "end of string");
8343 Perl_warner(aTHX_ packWARN(WARN_PRINTF), "%"SVf, msg); /* yes, this is reentrant */
8346 /* output mangled stuff ... */
8352 /* ... right here, because formatting flags should not apply */
8353 SvGROW(sv, SvCUR(sv) + elen + 1);
8355 Copy(eptr, p, elen, char);
8358 SvCUR(sv) = p - SvPVX(sv);
8359 continue; /* not "break" */
8362 if (is_utf8 != has_utf8) {
8365 sv_utf8_upgrade(sv);
8368 SV *nsv = sv_2mortal(newSVpvn(eptr, elen));
8369 sv_utf8_upgrade(nsv);
8373 SvGROW(sv, SvCUR(sv) + elen + 1);
8378 have = esignlen + zeros + elen;
8379 need = (have > width ? have : width);
8382 SvGROW(sv, SvCUR(sv) + need + dotstrlen + 1);
8384 if (esignlen && fill == '0') {
8385 for (i = 0; i < (int)esignlen; i++)
8389 memset(p, fill, gap);
8392 if (esignlen && fill != '0') {
8393 for (i = 0; i < (int)esignlen; i++)
8397 for (i = zeros; i; i--)
8401 Copy(eptr, p, elen, char);
8405 memset(p, ' ', gap);
8410 Copy(dotstr, p, dotstrlen, char);
8414 vectorize = FALSE; /* done iterating over vecstr */
8421 SvCUR(sv) = p - SvPVX(sv);
8429 /* =========================================================================
8431 =head1 Cloning an interpreter
8433 All the macros and functions in this section are for the private use of
8434 the main function, perl_clone().
8436 The foo_dup() functions make an exact copy of an existing foo thinngy.
8437 During the course of a cloning, a hash table is used to map old addresses
8438 to new addresses. The table is created and manipulated with the
8439 ptr_table_* functions.
8443 ============================================================================*/
8446 #if defined(USE_ITHREADS)
8448 #if defined(USE_5005THREADS)
8449 # include "error: USE_5005THREADS and USE_ITHREADS are incompatible"
8452 #ifndef GpREFCNT_inc
8453 # define GpREFCNT_inc(gp) ((gp) ? (++(gp)->gp_refcnt, (gp)) : (GP*)NULL)
8457 #define sv_dup_inc(s,t) SvREFCNT_inc(sv_dup(s,t))
8458 #define av_dup(s,t) (AV*)sv_dup((SV*)s,t)
8459 #define av_dup_inc(s,t) (AV*)SvREFCNT_inc(sv_dup((SV*)s,t))
8460 #define hv_dup(s,t) (HV*)sv_dup((SV*)s,t)
8461 #define hv_dup_inc(s,t) (HV*)SvREFCNT_inc(sv_dup((SV*)s,t))
8462 #define cv_dup(s,t) (CV*)sv_dup((SV*)s,t)
8463 #define cv_dup_inc(s,t) (CV*)SvREFCNT_inc(sv_dup((SV*)s,t))
8464 #define io_dup(s,t) (IO*)sv_dup((SV*)s,t)
8465 #define io_dup_inc(s,t) (IO*)SvREFCNT_inc(sv_dup((SV*)s,t))
8466 #define gv_dup(s,t) (GV*)sv_dup((SV*)s,t)
8467 #define gv_dup_inc(s,t) (GV*)SvREFCNT_inc(sv_dup((SV*)s,t))
8468 #define SAVEPV(p) (p ? savepv(p) : Nullch)
8469 #define SAVEPVN(p,n) (p ? savepvn(p,n) : Nullch)
8472 /* Duplicate a regexp. Required reading: pregcomp() and pregfree() in
8473 regcomp.c. AMS 20010712 */
8476 Perl_re_dup(pTHX_ REGEXP *r, CLONE_PARAMS *param)
8480 struct reg_substr_datum *s;
8483 return (REGEXP *)NULL;
8485 if ((ret = (REGEXP *)ptr_table_fetch(PL_ptr_table, r)))
8488 len = r->offsets[0];
8489 npar = r->nparens+1;
8491 Newc(0, ret, sizeof(regexp) + (len+1)*sizeof(regnode), char, regexp);
8492 Copy(r->program, ret->program, len+1, regnode);
8494 New(0, ret->startp, npar, I32);
8495 Copy(r->startp, ret->startp, npar, I32);
8496 New(0, ret->endp, npar, I32);
8497 Copy(r->startp, ret->startp, npar, I32);
8499 New(0, ret->substrs, 1, struct reg_substr_data);
8500 for (s = ret->substrs->data, i = 0; i < 3; i++, s++) {
8501 s->min_offset = r->substrs->data[i].min_offset;
8502 s->max_offset = r->substrs->data[i].max_offset;
8503 s->substr = sv_dup_inc(r->substrs->data[i].substr, param);
8504 s->utf8_substr = sv_dup_inc(r->substrs->data[i].utf8_substr, param);
8507 ret->regstclass = NULL;
8510 int count = r->data->count;
8512 Newc(0, d, sizeof(struct reg_data) + count*sizeof(void *),
8513 char, struct reg_data);
8514 New(0, d->what, count, U8);
8517 for (i = 0; i < count; i++) {
8518 d->what[i] = r->data->what[i];
8519 switch (d->what[i]) {
8521 d->data[i] = sv_dup_inc((SV *)r->data->data[i], param);
8524 d->data[i] = av_dup_inc((AV *)r->data->data[i], param);
8527 /* This is cheating. */
8528 New(0, d->data[i], 1, struct regnode_charclass_class);
8529 StructCopy(r->data->data[i], d->data[i],
8530 struct regnode_charclass_class);
8531 ret->regstclass = (regnode*)d->data[i];
8534 /* Compiled op trees are readonly, and can thus be
8535 shared without duplication. */
8536 d->data[i] = (void*)OpREFCNT_inc((OP*)r->data->data[i]);
8539 d->data[i] = r->data->data[i];
8549 New(0, ret->offsets, 2*len+1, U32);
8550 Copy(r->offsets, ret->offsets, 2*len+1, U32);
8552 ret->precomp = SAVEPV(r->precomp);
8553 ret->refcnt = r->refcnt;
8554 ret->minlen = r->minlen;
8555 ret->prelen = r->prelen;
8556 ret->nparens = r->nparens;
8557 ret->lastparen = r->lastparen;
8558 ret->lastcloseparen = r->lastcloseparen;
8559 ret->reganch = r->reganch;
8561 ret->sublen = r->sublen;
8563 if (RX_MATCH_COPIED(ret))
8564 ret->subbeg = SAVEPV(r->subbeg);
8566 ret->subbeg = Nullch;
8568 ptr_table_store(PL_ptr_table, r, ret);
8572 /* duplicate a file handle */
8575 Perl_fp_dup(pTHX_ PerlIO *fp, char type, CLONE_PARAMS *param)
8579 return (PerlIO*)NULL;
8581 /* look for it in the table first */
8582 ret = (PerlIO*)ptr_table_fetch(PL_ptr_table, fp);
8586 /* create anew and remember what it is */
8587 ret = PerlIO_fdupopen(aTHX_ fp, param, PERLIO_DUP_CLONE);
8588 ptr_table_store(PL_ptr_table, fp, ret);
8592 /* duplicate a directory handle */
8595 Perl_dirp_dup(pTHX_ DIR *dp)
8603 /* duplicate a typeglob */
8606 Perl_gp_dup(pTHX_ GP *gp, CLONE_PARAMS* param)
8611 /* look for it in the table first */
8612 ret = (GP*)ptr_table_fetch(PL_ptr_table, gp);
8616 /* create anew and remember what it is */
8617 Newz(0, ret, 1, GP);
8618 ptr_table_store(PL_ptr_table, gp, ret);
8621 ret->gp_refcnt = 0; /* must be before any other dups! */
8622 ret->gp_sv = sv_dup_inc(gp->gp_sv, param);
8623 ret->gp_io = io_dup_inc(gp->gp_io, param);
8624 ret->gp_form = cv_dup_inc(gp->gp_form, param);
8625 ret->gp_av = av_dup_inc(gp->gp_av, param);
8626 ret->gp_hv = hv_dup_inc(gp->gp_hv, param);
8627 ret->gp_egv = gv_dup(gp->gp_egv, param);/* GvEGV is not refcounted */
8628 ret->gp_cv = cv_dup_inc(gp->gp_cv, param);
8629 ret->gp_cvgen = gp->gp_cvgen;
8630 ret->gp_flags = gp->gp_flags;
8631 ret->gp_line = gp->gp_line;
8632 ret->gp_file = gp->gp_file; /* points to COP.cop_file */
8636 /* duplicate a chain of magic */
8639 Perl_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS* param)
8641 MAGIC *mgprev = (MAGIC*)NULL;
8644 return (MAGIC*)NULL;
8645 /* look for it in the table first */
8646 mgret = (MAGIC*)ptr_table_fetch(PL_ptr_table, mg);
8650 for (; mg; mg = mg->mg_moremagic) {
8652 Newz(0, nmg, 1, MAGIC);
8654 mgprev->mg_moremagic = nmg;
8657 nmg->mg_virtual = mg->mg_virtual; /* XXX copy dynamic vtable? */
8658 nmg->mg_private = mg->mg_private;
8659 nmg->mg_type = mg->mg_type;
8660 nmg->mg_flags = mg->mg_flags;
8661 if (mg->mg_type == PERL_MAGIC_qr) {
8662 nmg->mg_obj = (SV*)re_dup((REGEXP*)mg->mg_obj, param);
8664 else if(mg->mg_type == PERL_MAGIC_backref) {
8665 AV *av = (AV*) mg->mg_obj;
8668 nmg->mg_obj = (SV*)newAV();
8672 av_push((AV*)nmg->mg_obj,sv_dup(svp[i],param));
8677 nmg->mg_obj = (mg->mg_flags & MGf_REFCOUNTED)
8678 ? sv_dup_inc(mg->mg_obj, param)
8679 : sv_dup(mg->mg_obj, param);
8681 nmg->mg_len = mg->mg_len;
8682 nmg->mg_ptr = mg->mg_ptr; /* XXX random ptr? */
8683 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
8684 if (mg->mg_len > 0) {
8685 nmg->mg_ptr = SAVEPVN(mg->mg_ptr, mg->mg_len);
8686 if (mg->mg_type == PERL_MAGIC_overload_table &&
8687 AMT_AMAGIC((AMT*)mg->mg_ptr))
8689 AMT *amtp = (AMT*)mg->mg_ptr;
8690 AMT *namtp = (AMT*)nmg->mg_ptr;
8692 for (i = 1; i < NofAMmeth; i++) {
8693 namtp->table[i] = cv_dup_inc(amtp->table[i], param);
8697 else if (mg->mg_len == HEf_SVKEY)
8698 nmg->mg_ptr = (char*)sv_dup_inc((SV*)mg->mg_ptr, param);
8700 if ((mg->mg_flags & MGf_DUP) && mg->mg_virtual && mg->mg_virtual->svt_dup) {
8701 CALL_FPTR(nmg->mg_virtual->svt_dup)(aTHX_ nmg, param);
8708 /* create a new pointer-mapping table */
8711 Perl_ptr_table_new(pTHX)
8714 Newz(0, tbl, 1, PTR_TBL_t);
8717 Newz(0, tbl->tbl_ary, tbl->tbl_max + 1, PTR_TBL_ENT_t*);
8721 /* map an existing pointer using a table */
8724 Perl_ptr_table_fetch(pTHX_ PTR_TBL_t *tbl, void *sv)
8726 PTR_TBL_ENT_t *tblent;
8727 UV hash = PTR2UV(sv);
8729 tblent = tbl->tbl_ary[hash & tbl->tbl_max];
8730 for (; tblent; tblent = tblent->next) {
8731 if (tblent->oldval == sv)
8732 return tblent->newval;
8737 /* add a new entry to a pointer-mapping table */
8740 Perl_ptr_table_store(pTHX_ PTR_TBL_t *tbl, void *oldv, void *newv)
8742 PTR_TBL_ENT_t *tblent, **otblent;
8743 /* XXX this may be pessimal on platforms where pointers aren't good
8744 * hash values e.g. if they grow faster in the most significant
8746 UV hash = PTR2UV(oldv);
8750 otblent = &tbl->tbl_ary[hash & tbl->tbl_max];
8751 for (tblent = *otblent; tblent; i=0, tblent = tblent->next) {
8752 if (tblent->oldval == oldv) {
8753 tblent->newval = newv;
8758 Newz(0, tblent, 1, PTR_TBL_ENT_t);
8759 tblent->oldval = oldv;
8760 tblent->newval = newv;
8761 tblent->next = *otblent;
8764 if (i && tbl->tbl_items > tbl->tbl_max)
8765 ptr_table_split(tbl);
8768 /* double the hash bucket size of an existing ptr table */
8771 Perl_ptr_table_split(pTHX_ PTR_TBL_t *tbl)
8773 PTR_TBL_ENT_t **ary = tbl->tbl_ary;
8774 UV oldsize = tbl->tbl_max + 1;
8775 UV newsize = oldsize * 2;
8778 Renew(ary, newsize, PTR_TBL_ENT_t*);
8779 Zero(&ary[oldsize], newsize-oldsize, PTR_TBL_ENT_t*);
8780 tbl->tbl_max = --newsize;
8782 for (i=0; i < oldsize; i++, ary++) {
8783 PTR_TBL_ENT_t **curentp, **entp, *ent;
8786 curentp = ary + oldsize;
8787 for (entp = ary, ent = *ary; ent; ent = *entp) {
8788 if ((newsize & PTR2UV(ent->oldval)) != i) {
8790 ent->next = *curentp;
8800 /* remove all the entries from a ptr table */
8803 Perl_ptr_table_clear(pTHX_ PTR_TBL_t *tbl)
8805 register PTR_TBL_ENT_t **array;
8806 register PTR_TBL_ENT_t *entry;
8807 register PTR_TBL_ENT_t *oentry = Null(PTR_TBL_ENT_t*);
8811 if (!tbl || !tbl->tbl_items) {
8815 array = tbl->tbl_ary;
8822 entry = entry->next;
8826 if (++riter > max) {
8829 entry = array[riter];
8836 /* clear and free a ptr table */
8839 Perl_ptr_table_free(pTHX_ PTR_TBL_t *tbl)
8844 ptr_table_clear(tbl);
8845 Safefree(tbl->tbl_ary);
8853 /* attempt to make everything in the typeglob readonly */
8856 S_gv_share(pTHX_ SV *sstr)
8859 SV *sv = &PL_sv_no; /* just need SvREADONLY-ness */
8861 if (GvIO(gv) || GvFORM(gv)) {
8862 GvUNIQUE_off(gv); /* GvIOs cannot be shared. nor can GvFORMs */
8864 else if (!GvCV(gv)) {
8868 /* CvPADLISTs cannot be shared */
8869 if (!CvXSUB(GvCV(gv))) {
8874 if (!GvUNIQUE(gv)) {
8876 PerlIO_printf(Perl_debug_log, "gv_share: unable to share %s::%s\n",
8877 HvNAME(GvSTASH(gv)), GvNAME(gv));
8883 * write attempts will die with
8884 * "Modification of a read-only value attempted"
8890 SvREADONLY_on(GvSV(gv));
8897 SvREADONLY_on(GvAV(gv));
8904 SvREADONLY_on(GvAV(gv));
8907 return sstr; /* he_dup() will SvREFCNT_inc() */
8910 /* duplicate an SV of any type (including AV, HV etc) */
8913 Perl_rvpv_dup(pTHX_ SV *dstr, SV *sstr, CLONE_PARAMS* param)
8916 SvRV(dstr) = SvWEAKREF(sstr)
8917 ? sv_dup(SvRV(sstr), param)
8918 : sv_dup_inc(SvRV(sstr), param);
8920 else if (SvPVX(sstr)) {
8921 /* Has something there */
8923 /* Normal PV - clone whole allocated space */
8924 SvPVX(dstr) = SAVEPVN(SvPVX(sstr), SvLEN(sstr)-1);
8927 /* Special case - not normally malloced for some reason */
8928 if (SvREADONLY(sstr) && SvFAKE(sstr)) {
8929 /* A "shared" PV - clone it as unshared string */
8931 SvREADONLY_off(dstr);
8932 SvPVX(dstr) = SAVEPVN(SvPVX(sstr), SvCUR(sstr));
8935 /* Some other special case - random pointer */
8936 SvPVX(dstr) = SvPVX(sstr);
8942 SvPVX(dstr) = SvPVX(sstr);
8947 Perl_sv_dup(pTHX_ SV *sstr, CLONE_PARAMS* param)
8951 if (!sstr || SvTYPE(sstr) == SVTYPEMASK)
8953 /* look for it in the table first */
8954 dstr = (SV*)ptr_table_fetch(PL_ptr_table, sstr);
8958 /* create anew and remember what it is */
8960 ptr_table_store(PL_ptr_table, sstr, dstr);
8963 SvFLAGS(dstr) = SvFLAGS(sstr);
8964 SvFLAGS(dstr) &= ~SVf_OOK; /* don't propagate OOK hack */
8965 SvREFCNT(dstr) = 0; /* must be before any other dups! */
8968 if (SvANY(sstr) && PL_watch_pvx && SvPVX(sstr) == PL_watch_pvx)
8969 PerlIO_printf(Perl_debug_log, "watch at %p hit, found string \"%s\"\n",
8970 PL_watch_pvx, SvPVX(sstr));
8973 switch (SvTYPE(sstr)) {
8978 SvANY(dstr) = new_XIV();
8979 SvIVX(dstr) = SvIVX(sstr);
8982 SvANY(dstr) = new_XNV();
8983 SvNVX(dstr) = SvNVX(sstr);
8986 SvANY(dstr) = new_XRV();
8987 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
8990 SvANY(dstr) = new_XPV();
8991 SvCUR(dstr) = SvCUR(sstr);
8992 SvLEN(dstr) = SvLEN(sstr);
8993 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
8996 SvANY(dstr) = new_XPVIV();
8997 SvCUR(dstr) = SvCUR(sstr);
8998 SvLEN(dstr) = SvLEN(sstr);
8999 SvIVX(dstr) = SvIVX(sstr);
9000 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9003 SvANY(dstr) = new_XPVNV();
9004 SvCUR(dstr) = SvCUR(sstr);
9005 SvLEN(dstr) = SvLEN(sstr);
9006 SvIVX(dstr) = SvIVX(sstr);
9007 SvNVX(dstr) = SvNVX(sstr);
9008 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9011 SvANY(dstr) = new_XPVMG();
9012 SvCUR(dstr) = SvCUR(sstr);
9013 SvLEN(dstr) = SvLEN(sstr);
9014 SvIVX(dstr) = SvIVX(sstr);
9015 SvNVX(dstr) = SvNVX(sstr);
9016 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9017 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9018 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9021 SvANY(dstr) = new_XPVBM();
9022 SvCUR(dstr) = SvCUR(sstr);
9023 SvLEN(dstr) = SvLEN(sstr);
9024 SvIVX(dstr) = SvIVX(sstr);
9025 SvNVX(dstr) = SvNVX(sstr);
9026 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9027 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9028 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9029 BmRARE(dstr) = BmRARE(sstr);
9030 BmUSEFUL(dstr) = BmUSEFUL(sstr);
9031 BmPREVIOUS(dstr)= BmPREVIOUS(sstr);
9034 SvANY(dstr) = new_XPVLV();
9035 SvCUR(dstr) = SvCUR(sstr);
9036 SvLEN(dstr) = SvLEN(sstr);
9037 SvIVX(dstr) = SvIVX(sstr);
9038 SvNVX(dstr) = SvNVX(sstr);
9039 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9040 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9041 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9042 LvTARGOFF(dstr) = LvTARGOFF(sstr); /* XXX sometimes holds PMOP* when DEBUGGING */
9043 LvTARGLEN(dstr) = LvTARGLEN(sstr);
9044 LvTARG(dstr) = sv_dup_inc(LvTARG(sstr), param);
9045 LvTYPE(dstr) = LvTYPE(sstr);
9048 if (GvUNIQUE((GV*)sstr)) {
9050 if ((share = gv_share(sstr))) {
9054 PerlIO_printf(Perl_debug_log, "sv_dup: sharing %s::%s\n",
9055 HvNAME(GvSTASH(share)), GvNAME(share));
9060 SvANY(dstr) = new_XPVGV();
9061 SvCUR(dstr) = SvCUR(sstr);
9062 SvLEN(dstr) = SvLEN(sstr);
9063 SvIVX(dstr) = SvIVX(sstr);
9064 SvNVX(dstr) = SvNVX(sstr);
9065 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9066 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9067 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9068 GvNAMELEN(dstr) = GvNAMELEN(sstr);
9069 GvNAME(dstr) = SAVEPVN(GvNAME(sstr), GvNAMELEN(sstr));
9070 GvSTASH(dstr) = hv_dup_inc(GvSTASH(sstr), param);
9071 GvFLAGS(dstr) = GvFLAGS(sstr);
9072 GvGP(dstr) = gp_dup(GvGP(sstr), param);
9073 (void)GpREFCNT_inc(GvGP(dstr));
9076 SvANY(dstr) = new_XPVIO();
9077 SvCUR(dstr) = SvCUR(sstr);
9078 SvLEN(dstr) = SvLEN(sstr);
9079 SvIVX(dstr) = SvIVX(sstr);
9080 SvNVX(dstr) = SvNVX(sstr);
9081 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9082 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9083 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9084 IoIFP(dstr) = fp_dup(IoIFP(sstr), IoTYPE(sstr), param);
9085 if (IoOFP(sstr) == IoIFP(sstr))
9086 IoOFP(dstr) = IoIFP(dstr);
9088 IoOFP(dstr) = fp_dup(IoOFP(sstr), IoTYPE(sstr), param);
9089 /* PL_rsfp_filters entries have fake IoDIRP() */
9090 if (IoDIRP(sstr) && !(IoFLAGS(sstr) & IOf_FAKE_DIRP))
9091 IoDIRP(dstr) = dirp_dup(IoDIRP(sstr));
9093 IoDIRP(dstr) = IoDIRP(sstr);
9094 IoLINES(dstr) = IoLINES(sstr);
9095 IoPAGE(dstr) = IoPAGE(sstr);
9096 IoPAGE_LEN(dstr) = IoPAGE_LEN(sstr);
9097 IoLINES_LEFT(dstr) = IoLINES_LEFT(sstr);
9098 IoTOP_NAME(dstr) = SAVEPV(IoTOP_NAME(sstr));
9099 IoTOP_GV(dstr) = gv_dup(IoTOP_GV(sstr), param);
9100 IoFMT_NAME(dstr) = SAVEPV(IoFMT_NAME(sstr));
9101 IoFMT_GV(dstr) = gv_dup(IoFMT_GV(sstr), param);
9102 IoBOTTOM_NAME(dstr) = SAVEPV(IoBOTTOM_NAME(sstr));
9103 IoBOTTOM_GV(dstr) = gv_dup(IoBOTTOM_GV(sstr), param);
9104 IoSUBPROCESS(dstr) = IoSUBPROCESS(sstr);
9105 IoTYPE(dstr) = IoTYPE(sstr);
9106 IoFLAGS(dstr) = IoFLAGS(sstr);
9109 SvANY(dstr) = new_XPVAV();
9110 SvCUR(dstr) = SvCUR(sstr);
9111 SvLEN(dstr) = SvLEN(sstr);
9112 SvIVX(dstr) = SvIVX(sstr);
9113 SvNVX(dstr) = SvNVX(sstr);
9114 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9115 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9116 AvARYLEN((AV*)dstr) = sv_dup_inc(AvARYLEN((AV*)sstr), param);
9117 AvFLAGS((AV*)dstr) = AvFLAGS((AV*)sstr);
9118 if (AvARRAY((AV*)sstr)) {
9119 SV **dst_ary, **src_ary;
9120 SSize_t items = AvFILLp((AV*)sstr) + 1;
9122 src_ary = AvARRAY((AV*)sstr);
9123 Newz(0, dst_ary, AvMAX((AV*)sstr)+1, SV*);
9124 ptr_table_store(PL_ptr_table, src_ary, dst_ary);
9125 SvPVX(dstr) = (char*)dst_ary;
9126 AvALLOC((AV*)dstr) = dst_ary;
9127 if (AvREAL((AV*)sstr)) {
9129 *dst_ary++ = sv_dup_inc(*src_ary++, param);
9133 *dst_ary++ = sv_dup(*src_ary++, param);
9135 items = AvMAX((AV*)sstr) - AvFILLp((AV*)sstr);
9136 while (items-- > 0) {
9137 *dst_ary++ = &PL_sv_undef;
9141 SvPVX(dstr) = Nullch;
9142 AvALLOC((AV*)dstr) = (SV**)NULL;
9146 SvANY(dstr) = new_XPVHV();
9147 SvCUR(dstr) = SvCUR(sstr);
9148 SvLEN(dstr) = SvLEN(sstr);
9149 SvIVX(dstr) = SvIVX(sstr);
9150 SvNVX(dstr) = SvNVX(sstr);
9151 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9152 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9153 HvRITER((HV*)dstr) = HvRITER((HV*)sstr);
9154 if (HvARRAY((HV*)sstr)) {
9156 XPVHV *dxhv = (XPVHV*)SvANY(dstr);
9157 XPVHV *sxhv = (XPVHV*)SvANY(sstr);
9158 Newz(0, dxhv->xhv_array,
9159 PERL_HV_ARRAY_ALLOC_BYTES(dxhv->xhv_max+1), char);
9160 while (i <= sxhv->xhv_max) {
9161 ((HE**)dxhv->xhv_array)[i] = he_dup(((HE**)sxhv->xhv_array)[i],
9162 (bool)!!HvSHAREKEYS(sstr),
9166 dxhv->xhv_eiter = he_dup(sxhv->xhv_eiter,
9167 (bool)!!HvSHAREKEYS(sstr), param);
9170 SvPVX(dstr) = Nullch;
9171 HvEITER((HV*)dstr) = (HE*)NULL;
9173 HvPMROOT((HV*)dstr) = HvPMROOT((HV*)sstr); /* XXX */
9174 HvNAME((HV*)dstr) = SAVEPV(HvNAME((HV*)sstr));
9175 /* Record stashes for possible cloning in Perl_clone(). */
9176 if(HvNAME((HV*)dstr))
9177 av_push(param->stashes, dstr);
9180 SvANY(dstr) = new_XPVFM();
9181 FmLINES(dstr) = FmLINES(sstr);
9185 SvANY(dstr) = new_XPVCV();
9187 SvCUR(dstr) = SvCUR(sstr);
9188 SvLEN(dstr) = SvLEN(sstr);
9189 SvIVX(dstr) = SvIVX(sstr);
9190 SvNVX(dstr) = SvNVX(sstr);
9191 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9192 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9193 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9194 CvSTASH(dstr) = hv_dup(CvSTASH(sstr), param); /* NOTE: not refcounted */
9195 CvSTART(dstr) = CvSTART(sstr);
9196 CvROOT(dstr) = OpREFCNT_inc(CvROOT(sstr));
9197 CvXSUB(dstr) = CvXSUB(sstr);
9198 CvXSUBANY(dstr) = CvXSUBANY(sstr);
9199 if (CvCONST(sstr)) {
9200 CvXSUBANY(dstr).any_ptr = GvUNIQUE(CvGV(sstr)) ?
9201 SvREFCNT_inc(CvXSUBANY(sstr).any_ptr) :
9202 sv_dup_inc(CvXSUBANY(sstr).any_ptr, param);
9204 CvGV(dstr) = gv_dup(CvGV(sstr), param);
9205 if (param->flags & CLONEf_COPY_STACKS) {
9206 CvDEPTH(dstr) = CvDEPTH(sstr);
9210 if (CvPADLIST(sstr) && !AvREAL(CvPADLIST(sstr))) {
9211 /* XXX padlists are real, but pretend to be not */
9212 AvREAL_on(CvPADLIST(sstr));
9213 CvPADLIST(dstr) = av_dup_inc(CvPADLIST(sstr), param);
9214 AvREAL_off(CvPADLIST(sstr));
9215 AvREAL_off(CvPADLIST(dstr));
9218 CvPADLIST(dstr) = av_dup_inc(CvPADLIST(sstr), param);
9219 if (!CvANON(sstr) || CvCLONED(sstr))
9220 CvOUTSIDE(dstr) = cv_dup_inc(CvOUTSIDE(sstr), param);
9222 CvOUTSIDE(dstr) = cv_dup(CvOUTSIDE(sstr), param);
9223 CvFLAGS(dstr) = CvFLAGS(sstr);
9224 CvFILE(dstr) = CvXSUB(sstr) ? CvFILE(sstr) : SAVEPV(CvFILE(sstr));
9227 Perl_croak(aTHX_ "Bizarre SvTYPE [%" IVdf "]", (IV)SvTYPE(sstr));
9231 if (SvOBJECT(dstr) && SvTYPE(dstr) != SVt_PVIO)
9237 /* duplicate a context */
9240 Perl_cx_dup(pTHX_ PERL_CONTEXT *cxs, I32 ix, I32 max, CLONE_PARAMS* param)
9245 return (PERL_CONTEXT*)NULL;
9247 /* look for it in the table first */
9248 ncxs = (PERL_CONTEXT*)ptr_table_fetch(PL_ptr_table, cxs);
9252 /* create anew and remember what it is */
9253 Newz(56, ncxs, max + 1, PERL_CONTEXT);
9254 ptr_table_store(PL_ptr_table, cxs, ncxs);
9257 PERL_CONTEXT *cx = &cxs[ix];
9258 PERL_CONTEXT *ncx = &ncxs[ix];
9259 ncx->cx_type = cx->cx_type;
9260 if (CxTYPE(cx) == CXt_SUBST) {
9261 Perl_croak(aTHX_ "Cloning substitution context is unimplemented");
9264 ncx->blk_oldsp = cx->blk_oldsp;
9265 ncx->blk_oldcop = cx->blk_oldcop;
9266 ncx->blk_oldretsp = cx->blk_oldretsp;
9267 ncx->blk_oldmarksp = cx->blk_oldmarksp;
9268 ncx->blk_oldscopesp = cx->blk_oldscopesp;
9269 ncx->blk_oldpm = cx->blk_oldpm;
9270 ncx->blk_gimme = cx->blk_gimme;
9271 switch (CxTYPE(cx)) {
9273 ncx->blk_sub.cv = (cx->blk_sub.olddepth == 0
9274 ? cv_dup_inc(cx->blk_sub.cv, param)
9275 : cv_dup(cx->blk_sub.cv,param));
9276 ncx->blk_sub.argarray = (cx->blk_sub.hasargs
9277 ? av_dup_inc(cx->blk_sub.argarray, param)
9279 ncx->blk_sub.savearray = av_dup_inc(cx->blk_sub.savearray, param);
9280 ncx->blk_sub.olddepth = cx->blk_sub.olddepth;
9281 ncx->blk_sub.hasargs = cx->blk_sub.hasargs;
9282 ncx->blk_sub.lval = cx->blk_sub.lval;
9285 ncx->blk_eval.old_in_eval = cx->blk_eval.old_in_eval;
9286 ncx->blk_eval.old_op_type = cx->blk_eval.old_op_type;
9287 ncx->blk_eval.old_namesv = sv_dup_inc(cx->blk_eval.old_namesv, param);;
9288 ncx->blk_eval.old_eval_root = cx->blk_eval.old_eval_root;
9289 ncx->blk_eval.cur_text = sv_dup(cx->blk_eval.cur_text, param);
9292 ncx->blk_loop.label = cx->blk_loop.label;
9293 ncx->blk_loop.resetsp = cx->blk_loop.resetsp;
9294 ncx->blk_loop.redo_op = cx->blk_loop.redo_op;
9295 ncx->blk_loop.next_op = cx->blk_loop.next_op;
9296 ncx->blk_loop.last_op = cx->blk_loop.last_op;
9297 ncx->blk_loop.iterdata = (CxPADLOOP(cx)
9298 ? cx->blk_loop.iterdata
9299 : gv_dup((GV*)cx->blk_loop.iterdata, param));
9300 ncx->blk_loop.oldcurpad
9301 = (SV**)ptr_table_fetch(PL_ptr_table,
9302 cx->blk_loop.oldcurpad);
9303 ncx->blk_loop.itersave = sv_dup_inc(cx->blk_loop.itersave, param);
9304 ncx->blk_loop.iterlval = sv_dup_inc(cx->blk_loop.iterlval, param);
9305 ncx->blk_loop.iterary = av_dup_inc(cx->blk_loop.iterary, param);
9306 ncx->blk_loop.iterix = cx->blk_loop.iterix;
9307 ncx->blk_loop.itermax = cx->blk_loop.itermax;
9310 ncx->blk_sub.cv = cv_dup(cx->blk_sub.cv, param);
9311 ncx->blk_sub.gv = gv_dup(cx->blk_sub.gv, param);
9312 ncx->blk_sub.dfoutgv = gv_dup_inc(cx->blk_sub.dfoutgv, param);
9313 ncx->blk_sub.hasargs = cx->blk_sub.hasargs;
9325 /* duplicate a stack info structure */
9328 Perl_si_dup(pTHX_ PERL_SI *si, CLONE_PARAMS* param)
9333 return (PERL_SI*)NULL;
9335 /* look for it in the table first */
9336 nsi = (PERL_SI*)ptr_table_fetch(PL_ptr_table, si);
9340 /* create anew and remember what it is */
9341 Newz(56, nsi, 1, PERL_SI);
9342 ptr_table_store(PL_ptr_table, si, nsi);
9344 nsi->si_stack = av_dup_inc(si->si_stack, param);
9345 nsi->si_cxix = si->si_cxix;
9346 nsi->si_cxmax = si->si_cxmax;
9347 nsi->si_cxstack = cx_dup(si->si_cxstack, si->si_cxix, si->si_cxmax, param);
9348 nsi->si_type = si->si_type;
9349 nsi->si_prev = si_dup(si->si_prev, param);
9350 nsi->si_next = si_dup(si->si_next, param);
9351 nsi->si_markoff = si->si_markoff;
9356 #define POPINT(ss,ix) ((ss)[--(ix)].any_i32)
9357 #define TOPINT(ss,ix) ((ss)[ix].any_i32)
9358 #define POPLONG(ss,ix) ((ss)[--(ix)].any_long)
9359 #define TOPLONG(ss,ix) ((ss)[ix].any_long)
9360 #define POPIV(ss,ix) ((ss)[--(ix)].any_iv)
9361 #define TOPIV(ss,ix) ((ss)[ix].any_iv)
9362 #define POPPTR(ss,ix) ((ss)[--(ix)].any_ptr)
9363 #define TOPPTR(ss,ix) ((ss)[ix].any_ptr)
9364 #define POPDPTR(ss,ix) ((ss)[--(ix)].any_dptr)
9365 #define TOPDPTR(ss,ix) ((ss)[ix].any_dptr)
9366 #define POPDXPTR(ss,ix) ((ss)[--(ix)].any_dxptr)
9367 #define TOPDXPTR(ss,ix) ((ss)[ix].any_dxptr)
9370 #define pv_dup_inc(p) SAVEPV(p)
9371 #define pv_dup(p) SAVEPV(p)
9372 #define svp_dup_inc(p,pp) any_dup(p,pp)
9374 /* map any object to the new equivent - either something in the
9375 * ptr table, or something in the interpreter structure
9379 Perl_any_dup(pTHX_ void *v, PerlInterpreter *proto_perl)
9386 /* look for it in the table first */
9387 ret = ptr_table_fetch(PL_ptr_table, v);
9391 /* see if it is part of the interpreter structure */
9392 if (v >= (void*)proto_perl && v < (void*)(proto_perl+1))
9393 ret = (void*)(((char*)aTHX) + (((char*)v) - (char*)proto_perl));
9401 /* duplicate the save stack */
9404 Perl_ss_dup(pTHX_ PerlInterpreter *proto_perl, CLONE_PARAMS* param)
9406 ANY *ss = proto_perl->Tsavestack;
9407 I32 ix = proto_perl->Tsavestack_ix;
9408 I32 max = proto_perl->Tsavestack_max;
9421 void (*dptr) (void*);
9422 void (*dxptr) (pTHX_ void*);
9425 Newz(54, nss, max, ANY);
9431 case SAVEt_ITEM: /* normal string */
9432 sv = (SV*)POPPTR(ss,ix);
9433 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9434 sv = (SV*)POPPTR(ss,ix);
9435 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9437 case SAVEt_SV: /* scalar reference */
9438 sv = (SV*)POPPTR(ss,ix);
9439 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9440 gv = (GV*)POPPTR(ss,ix);
9441 TOPPTR(nss,ix) = gv_dup_inc(gv, param);
9443 case SAVEt_GENERIC_PVREF: /* generic char* */
9444 c = (char*)POPPTR(ss,ix);
9445 TOPPTR(nss,ix) = pv_dup(c);
9446 ptr = POPPTR(ss,ix);
9447 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9449 case SAVEt_SHARED_PVREF: /* char* in shared space */
9450 c = (char*)POPPTR(ss,ix);
9451 TOPPTR(nss,ix) = savesharedpv(c);
9452 ptr = POPPTR(ss,ix);
9453 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9455 case SAVEt_GENERIC_SVREF: /* generic sv */
9456 case SAVEt_SVREF: /* scalar reference */
9457 sv = (SV*)POPPTR(ss,ix);
9458 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9459 ptr = POPPTR(ss,ix);
9460 TOPPTR(nss,ix) = svp_dup_inc((SV**)ptr, proto_perl);/* XXXXX */
9462 case SAVEt_AV: /* array reference */
9463 av = (AV*)POPPTR(ss,ix);
9464 TOPPTR(nss,ix) = av_dup_inc(av, param);
9465 gv = (GV*)POPPTR(ss,ix);
9466 TOPPTR(nss,ix) = gv_dup(gv, param);
9468 case SAVEt_HV: /* hash reference */
9469 hv = (HV*)POPPTR(ss,ix);
9470 TOPPTR(nss,ix) = hv_dup_inc(hv, param);
9471 gv = (GV*)POPPTR(ss,ix);
9472 TOPPTR(nss,ix) = gv_dup(gv, param);
9474 case SAVEt_INT: /* int reference */
9475 ptr = POPPTR(ss,ix);
9476 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9477 intval = (int)POPINT(ss,ix);
9478 TOPINT(nss,ix) = intval;
9480 case SAVEt_LONG: /* long reference */
9481 ptr = POPPTR(ss,ix);
9482 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9483 longval = (long)POPLONG(ss,ix);
9484 TOPLONG(nss,ix) = longval;
9486 case SAVEt_I32: /* I32 reference */
9487 case SAVEt_I16: /* I16 reference */
9488 case SAVEt_I8: /* I8 reference */
9489 ptr = POPPTR(ss,ix);
9490 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9494 case SAVEt_IV: /* IV reference */
9495 ptr = POPPTR(ss,ix);
9496 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9500 case SAVEt_SPTR: /* SV* reference */
9501 ptr = POPPTR(ss,ix);
9502 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9503 sv = (SV*)POPPTR(ss,ix);
9504 TOPPTR(nss,ix) = sv_dup(sv, param);
9506 case SAVEt_VPTR: /* random* reference */
9507 ptr = POPPTR(ss,ix);
9508 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9509 ptr = POPPTR(ss,ix);
9510 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9512 case SAVEt_PPTR: /* char* reference */
9513 ptr = POPPTR(ss,ix);
9514 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9515 c = (char*)POPPTR(ss,ix);
9516 TOPPTR(nss,ix) = pv_dup(c);
9518 case SAVEt_HPTR: /* HV* reference */
9519 ptr = POPPTR(ss,ix);
9520 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9521 hv = (HV*)POPPTR(ss,ix);
9522 TOPPTR(nss,ix) = hv_dup(hv, param);
9524 case SAVEt_APTR: /* AV* reference */
9525 ptr = POPPTR(ss,ix);
9526 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9527 av = (AV*)POPPTR(ss,ix);
9528 TOPPTR(nss,ix) = av_dup(av, param);
9531 gv = (GV*)POPPTR(ss,ix);
9532 TOPPTR(nss,ix) = gv_dup(gv, param);
9534 case SAVEt_GP: /* scalar reference */
9535 gp = (GP*)POPPTR(ss,ix);
9536 TOPPTR(nss,ix) = gp = gp_dup(gp, param);
9537 (void)GpREFCNT_inc(gp);
9538 gv = (GV*)POPPTR(ss,ix);
9539 TOPPTR(nss,ix) = gv_dup_inc(gv, param);
9540 c = (char*)POPPTR(ss,ix);
9541 TOPPTR(nss,ix) = pv_dup(c);
9548 case SAVEt_MORTALIZESV:
9549 sv = (SV*)POPPTR(ss,ix);
9550 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9553 ptr = POPPTR(ss,ix);
9554 if (ptr && (((OP*)ptr)->op_private & OPpREFCOUNTED)) {
9555 /* these are assumed to be refcounted properly */
9556 switch (((OP*)ptr)->op_type) {
9563 TOPPTR(nss,ix) = ptr;
9568 TOPPTR(nss,ix) = Nullop;
9573 TOPPTR(nss,ix) = Nullop;
9576 c = (char*)POPPTR(ss,ix);
9577 TOPPTR(nss,ix) = pv_dup_inc(c);
9580 longval = POPLONG(ss,ix);
9581 TOPLONG(nss,ix) = longval;
9584 hv = (HV*)POPPTR(ss,ix);
9585 TOPPTR(nss,ix) = hv_dup_inc(hv, param);
9586 c = (char*)POPPTR(ss,ix);
9587 TOPPTR(nss,ix) = pv_dup_inc(c);
9591 case SAVEt_DESTRUCTOR:
9592 ptr = POPPTR(ss,ix);
9593 TOPPTR(nss,ix) = any_dup(ptr, proto_perl); /* XXX quite arbitrary */
9594 dptr = POPDPTR(ss,ix);
9595 TOPDPTR(nss,ix) = (void (*)(void*))any_dup((void *)dptr, proto_perl);
9597 case SAVEt_DESTRUCTOR_X:
9598 ptr = POPPTR(ss,ix);
9599 TOPPTR(nss,ix) = any_dup(ptr, proto_perl); /* XXX quite arbitrary */
9600 dxptr = POPDXPTR(ss,ix);
9601 TOPDXPTR(nss,ix) = (void (*)(pTHX_ void*))any_dup((void *)dxptr, proto_perl);
9603 case SAVEt_REGCONTEXT:
9609 case SAVEt_STACK_POS: /* Position on Perl stack */
9613 case SAVEt_AELEM: /* array element */
9614 sv = (SV*)POPPTR(ss,ix);
9615 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9618 av = (AV*)POPPTR(ss,ix);
9619 TOPPTR(nss,ix) = av_dup_inc(av, param);
9621 case SAVEt_HELEM: /* hash element */
9622 sv = (SV*)POPPTR(ss,ix);
9623 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9624 sv = (SV*)POPPTR(ss,ix);
9625 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9626 hv = (HV*)POPPTR(ss,ix);
9627 TOPPTR(nss,ix) = hv_dup_inc(hv, param);
9630 ptr = POPPTR(ss,ix);
9631 TOPPTR(nss,ix) = ptr;
9638 av = (AV*)POPPTR(ss,ix);
9639 TOPPTR(nss,ix) = av_dup(av, param);
9642 longval = (long)POPLONG(ss,ix);
9643 TOPLONG(nss,ix) = longval;
9644 ptr = POPPTR(ss,ix);
9645 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9646 sv = (SV*)POPPTR(ss,ix);
9647 TOPPTR(nss,ix) = sv_dup(sv, param);
9650 Perl_croak(aTHX_ "panic: ss_dup inconsistency");
9658 =for apidoc perl_clone
9660 Create and return a new interpreter by cloning the current one.
9665 /* XXX the above needs expanding by someone who actually understands it ! */
9666 EXTERN_C PerlInterpreter *
9667 perl_clone_host(PerlInterpreter* proto_perl, UV flags);
9670 perl_clone(PerlInterpreter *proto_perl, UV flags)
9672 #ifdef PERL_IMPLICIT_SYS
9674 /* perlhost.h so we need to call into it
9675 to clone the host, CPerlHost should have a c interface, sky */
9677 if (flags & CLONEf_CLONE_HOST) {
9678 return perl_clone_host(proto_perl,flags);
9680 return perl_clone_using(proto_perl, flags,
9682 proto_perl->IMemShared,
9683 proto_perl->IMemParse,
9693 perl_clone_using(PerlInterpreter *proto_perl, UV flags,
9694 struct IPerlMem* ipM, struct IPerlMem* ipMS,
9695 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
9696 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
9697 struct IPerlDir* ipD, struct IPerlSock* ipS,
9698 struct IPerlProc* ipP)
9700 /* XXX many of the string copies here can be optimized if they're
9701 * constants; they need to be allocated as common memory and just
9702 * their pointers copied. */
9705 CLONE_PARAMS clone_params;
9706 CLONE_PARAMS* param = &clone_params;
9708 PerlInterpreter *my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
9709 PERL_SET_THX(my_perl);
9712 memset(my_perl, 0xab, sizeof(PerlInterpreter));
9718 Zero(&PL_debug_pad, 1, struct perl_debug_pad);
9719 # else /* !DEBUGGING */
9720 Zero(my_perl, 1, PerlInterpreter);
9721 # endif /* DEBUGGING */
9725 PL_MemShared = ipMS;
9733 #else /* !PERL_IMPLICIT_SYS */
9735 CLONE_PARAMS clone_params;
9736 CLONE_PARAMS* param = &clone_params;
9737 PerlInterpreter *my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
9738 PERL_SET_THX(my_perl);
9743 memset(my_perl, 0xab, sizeof(PerlInterpreter));
9749 Zero(&PL_debug_pad, 1, struct perl_debug_pad);
9750 # else /* !DEBUGGING */
9751 Zero(my_perl, 1, PerlInterpreter);
9752 # endif /* DEBUGGING */
9753 #endif /* PERL_IMPLICIT_SYS */
9754 param->flags = flags;
9757 PL_xiv_arenaroot = NULL;
9759 PL_xnv_arenaroot = NULL;
9761 PL_xrv_arenaroot = NULL;
9763 PL_xpv_arenaroot = NULL;
9765 PL_xpviv_arenaroot = NULL;
9766 PL_xpviv_root = NULL;
9767 PL_xpvnv_arenaroot = NULL;
9768 PL_xpvnv_root = NULL;
9769 PL_xpvcv_arenaroot = NULL;
9770 PL_xpvcv_root = NULL;
9771 PL_xpvav_arenaroot = NULL;
9772 PL_xpvav_root = NULL;
9773 PL_xpvhv_arenaroot = NULL;
9774 PL_xpvhv_root = NULL;
9775 PL_xpvmg_arenaroot = NULL;
9776 PL_xpvmg_root = NULL;
9777 PL_xpvlv_arenaroot = NULL;
9778 PL_xpvlv_root = NULL;
9779 PL_xpvbm_arenaroot = NULL;
9780 PL_xpvbm_root = NULL;
9781 PL_he_arenaroot = NULL;
9783 PL_nice_chunk = NULL;
9784 PL_nice_chunk_size = 0;
9787 PL_sv_root = Nullsv;
9788 PL_sv_arenaroot = Nullsv;
9790 PL_debug = proto_perl->Idebug;
9792 #ifdef USE_REENTRANT_API
9793 Perl_reentrant_init(aTHX);
9796 /* create SV map for pointer relocation */
9797 PL_ptr_table = ptr_table_new();
9799 /* initialize these special pointers as early as possible */
9800 SvANY(&PL_sv_undef) = NULL;
9801 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
9802 SvFLAGS(&PL_sv_undef) = SVf_READONLY|SVt_NULL;
9803 ptr_table_store(PL_ptr_table, &proto_perl->Isv_undef, &PL_sv_undef);
9805 SvANY(&PL_sv_no) = new_XPVNV();
9806 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
9807 SvFLAGS(&PL_sv_no) = SVp_NOK|SVf_NOK|SVp_POK|SVf_POK|SVf_READONLY|SVt_PVNV;
9808 SvPVX(&PL_sv_no) = SAVEPVN(PL_No, 0);
9809 SvCUR(&PL_sv_no) = 0;
9810 SvLEN(&PL_sv_no) = 1;
9811 SvNVX(&PL_sv_no) = 0;
9812 ptr_table_store(PL_ptr_table, &proto_perl->Isv_no, &PL_sv_no);
9814 SvANY(&PL_sv_yes) = new_XPVNV();
9815 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
9816 SvFLAGS(&PL_sv_yes) = SVp_NOK|SVf_NOK|SVp_POK|SVf_POK|SVf_READONLY|SVt_PVNV;
9817 SvPVX(&PL_sv_yes) = SAVEPVN(PL_Yes, 1);
9818 SvCUR(&PL_sv_yes) = 1;
9819 SvLEN(&PL_sv_yes) = 2;
9820 SvNVX(&PL_sv_yes) = 1;
9821 ptr_table_store(PL_ptr_table, &proto_perl->Isv_yes, &PL_sv_yes);
9823 /* create (a non-shared!) shared string table */
9824 PL_strtab = newHV();
9825 HvSHAREKEYS_off(PL_strtab);
9826 hv_ksplit(PL_strtab, 512);
9827 ptr_table_store(PL_ptr_table, proto_perl->Istrtab, PL_strtab);
9829 PL_compiling = proto_perl->Icompiling;
9831 /* These two PVs will be free'd special way so must set them same way op.c does */
9832 PL_compiling.cop_stashpv = savesharedpv(PL_compiling.cop_stashpv);
9833 ptr_table_store(PL_ptr_table, proto_perl->Icompiling.cop_stashpv, PL_compiling.cop_stashpv);
9835 PL_compiling.cop_file = savesharedpv(PL_compiling.cop_file);
9836 ptr_table_store(PL_ptr_table, proto_perl->Icompiling.cop_file, PL_compiling.cop_file);
9838 ptr_table_store(PL_ptr_table, &proto_perl->Icompiling, &PL_compiling);
9839 if (!specialWARN(PL_compiling.cop_warnings))
9840 PL_compiling.cop_warnings = sv_dup_inc(PL_compiling.cop_warnings, param);
9841 if (!specialCopIO(PL_compiling.cop_io))
9842 PL_compiling.cop_io = sv_dup_inc(PL_compiling.cop_io, param);
9843 PL_curcop = (COP*)any_dup(proto_perl->Tcurcop, proto_perl);
9845 /* pseudo environmental stuff */
9846 PL_origargc = proto_perl->Iorigargc;
9848 New(0, PL_origargv, i+1, char*);
9849 PL_origargv[i] = '\0';
9851 PL_origargv[i] = SAVEPV(proto_perl->Iorigargv[i]);
9854 param->stashes = newAV(); /* Setup array of objects to call clone on */
9856 #ifdef PERLIO_LAYERS
9857 /* Clone PerlIO tables as soon as we can handle general xx_dup() */
9858 PerlIO_clone(aTHX_ proto_perl, param);
9861 PL_envgv = gv_dup(proto_perl->Ienvgv, param);
9862 PL_incgv = gv_dup(proto_perl->Iincgv, param);
9863 PL_hintgv = gv_dup(proto_perl->Ihintgv, param);
9864 PL_origfilename = SAVEPV(proto_perl->Iorigfilename);
9865 PL_diehook = sv_dup_inc(proto_perl->Idiehook, param);
9866 PL_warnhook = sv_dup_inc(proto_perl->Iwarnhook, param);
9869 PL_minus_c = proto_perl->Iminus_c;
9870 PL_patchlevel = sv_dup_inc(proto_perl->Ipatchlevel, param);
9871 PL_localpatches = proto_perl->Ilocalpatches;
9872 PL_splitstr = proto_perl->Isplitstr;
9873 PL_preprocess = proto_perl->Ipreprocess;
9874 PL_minus_n = proto_perl->Iminus_n;
9875 PL_minus_p = proto_perl->Iminus_p;
9876 PL_minus_l = proto_perl->Iminus_l;
9877 PL_minus_a = proto_perl->Iminus_a;
9878 PL_minus_F = proto_perl->Iminus_F;
9879 PL_doswitches = proto_perl->Idoswitches;
9880 PL_dowarn = proto_perl->Idowarn;
9881 PL_doextract = proto_perl->Idoextract;
9882 PL_sawampersand = proto_perl->Isawampersand;
9883 PL_unsafe = proto_perl->Iunsafe;
9884 PL_inplace = SAVEPV(proto_perl->Iinplace);
9885 PL_e_script = sv_dup_inc(proto_perl->Ie_script, param);
9886 PL_perldb = proto_perl->Iperldb;
9887 PL_perl_destruct_level = proto_perl->Iperl_destruct_level;
9888 PL_exit_flags = proto_perl->Iexit_flags;
9890 /* magical thingies */
9891 /* XXX time(&PL_basetime) when asked for? */
9892 PL_basetime = proto_perl->Ibasetime;
9893 PL_formfeed = sv_dup(proto_perl->Iformfeed, param);
9895 PL_maxsysfd = proto_perl->Imaxsysfd;
9896 PL_multiline = proto_perl->Imultiline;
9897 PL_statusvalue = proto_perl->Istatusvalue;
9899 PL_statusvalue_vms = proto_perl->Istatusvalue_vms;
9901 PL_encoding = sv_dup(proto_perl->Iencoding, param);
9903 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
9904 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
9905 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
9907 /* Clone the regex array */
9908 PL_regex_padav = newAV();
9910 I32 len = av_len((AV*)proto_perl->Iregex_padav);
9911 SV** regexen = AvARRAY((AV*)proto_perl->Iregex_padav);
9912 av_push(PL_regex_padav,
9913 sv_dup_inc(regexen[0],param));
9914 for(i = 1; i <= len; i++) {
9915 if(SvREPADTMP(regexen[i])) {
9916 av_push(PL_regex_padav, sv_dup_inc(regexen[i], param));
9918 av_push(PL_regex_padav,
9920 newSViv(PTR2IV(re_dup(INT2PTR(REGEXP *,
9921 SvIVX(regexen[i])), param)))
9926 PL_regex_pad = AvARRAY(PL_regex_padav);
9928 /* shortcuts to various I/O objects */
9929 PL_stdingv = gv_dup(proto_perl->Istdingv, param);
9930 PL_stderrgv = gv_dup(proto_perl->Istderrgv, param);
9931 PL_defgv = gv_dup(proto_perl->Idefgv, param);
9932 PL_argvgv = gv_dup(proto_perl->Iargvgv, param);
9933 PL_argvoutgv = gv_dup(proto_perl->Iargvoutgv, param);
9934 PL_argvout_stack = av_dup_inc(proto_perl->Iargvout_stack, param);
9936 /* shortcuts to regexp stuff */
9937 PL_replgv = gv_dup(proto_perl->Ireplgv, param);
9939 /* shortcuts to misc objects */
9940 PL_errgv = gv_dup(proto_perl->Ierrgv, param);
9942 /* shortcuts to debugging objects */
9943 PL_DBgv = gv_dup(proto_perl->IDBgv, param);
9944 PL_DBline = gv_dup(proto_perl->IDBline, param);
9945 PL_DBsub = gv_dup(proto_perl->IDBsub, param);
9946 PL_DBsingle = sv_dup(proto_perl->IDBsingle, param);
9947 PL_DBtrace = sv_dup(proto_perl->IDBtrace, param);
9948 PL_DBsignal = sv_dup(proto_perl->IDBsignal, param);
9949 PL_lineary = av_dup(proto_perl->Ilineary, param);
9950 PL_dbargs = av_dup(proto_perl->Idbargs, param);
9953 PL_defstash = hv_dup_inc(proto_perl->Tdefstash, param);
9954 PL_curstash = hv_dup(proto_perl->Tcurstash, param);
9955 PL_nullstash = hv_dup(proto_perl->Inullstash, param);
9956 PL_debstash = hv_dup(proto_perl->Idebstash, param);
9957 PL_globalstash = hv_dup(proto_perl->Iglobalstash, param);
9958 PL_curstname = sv_dup_inc(proto_perl->Icurstname, param);
9960 PL_beginav = av_dup_inc(proto_perl->Ibeginav, param);
9961 PL_beginav_save = av_dup_inc(proto_perl->Ibeginav_save, param);
9962 PL_endav = av_dup_inc(proto_perl->Iendav, param);
9963 PL_checkav = av_dup_inc(proto_perl->Icheckav, param);
9964 PL_initav = av_dup_inc(proto_perl->Iinitav, param);
9966 PL_sub_generation = proto_perl->Isub_generation;
9968 /* funky return mechanisms */
9969 PL_forkprocess = proto_perl->Iforkprocess;
9971 /* subprocess state */
9972 PL_fdpid = av_dup_inc(proto_perl->Ifdpid, param);
9974 /* internal state */
9975 PL_tainting = proto_perl->Itainting;
9976 PL_maxo = proto_perl->Imaxo;
9977 if (proto_perl->Iop_mask)
9978 PL_op_mask = SAVEPVN(proto_perl->Iop_mask, PL_maxo);
9980 PL_op_mask = Nullch;
9982 /* current interpreter roots */
9983 PL_main_cv = cv_dup_inc(proto_perl->Imain_cv, param);
9984 PL_main_root = OpREFCNT_inc(proto_perl->Imain_root);
9985 PL_main_start = proto_perl->Imain_start;
9986 PL_eval_root = proto_perl->Ieval_root;
9987 PL_eval_start = proto_perl->Ieval_start;
9989 /* runtime control stuff */
9990 PL_curcopdb = (COP*)any_dup(proto_perl->Icurcopdb, proto_perl);
9991 PL_copline = proto_perl->Icopline;
9993 PL_filemode = proto_perl->Ifilemode;
9994 PL_lastfd = proto_perl->Ilastfd;
9995 PL_oldname = proto_perl->Ioldname; /* XXX not quite right */
9998 PL_gensym = proto_perl->Igensym;
9999 PL_preambled = proto_perl->Ipreambled;
10000 PL_preambleav = av_dup_inc(proto_perl->Ipreambleav, param);
10001 PL_laststatval = proto_perl->Ilaststatval;
10002 PL_laststype = proto_perl->Ilaststype;
10003 PL_mess_sv = Nullsv;
10005 PL_ors_sv = sv_dup_inc(proto_perl->Iors_sv, param);
10006 PL_ofmt = SAVEPV(proto_perl->Iofmt);
10008 /* interpreter atexit processing */
10009 PL_exitlistlen = proto_perl->Iexitlistlen;
10010 if (PL_exitlistlen) {
10011 New(0, PL_exitlist, PL_exitlistlen, PerlExitListEntry);
10012 Copy(proto_perl->Iexitlist, PL_exitlist, PL_exitlistlen, PerlExitListEntry);
10015 PL_exitlist = (PerlExitListEntry*)NULL;
10016 PL_modglobal = hv_dup_inc(proto_perl->Imodglobal, param);
10017 PL_custom_op_names = hv_dup_inc(proto_perl->Icustom_op_names,param);
10018 PL_custom_op_descs = hv_dup_inc(proto_perl->Icustom_op_descs,param);
10020 PL_profiledata = NULL;
10021 PL_rsfp = fp_dup(proto_perl->Irsfp, '<', param);
10022 /* PL_rsfp_filters entries have fake IoDIRP() */
10023 PL_rsfp_filters = av_dup_inc(proto_perl->Irsfp_filters, param);
10025 PL_compcv = cv_dup(proto_perl->Icompcv, param);
10026 PL_comppad = av_dup(proto_perl->Icomppad, param);
10027 PL_comppad_name = av_dup(proto_perl->Icomppad_name, param);
10028 PL_comppad_name_fill = proto_perl->Icomppad_name_fill;
10029 PL_comppad_name_floor = proto_perl->Icomppad_name_floor;
10030 PL_curpad = (SV**)ptr_table_fetch(PL_ptr_table,
10031 proto_perl->Tcurpad);
10033 #ifdef HAVE_INTERP_INTERN
10034 sys_intern_dup(&proto_perl->Isys_intern, &PL_sys_intern);
10037 /* more statics moved here */
10038 PL_generation = proto_perl->Igeneration;
10039 PL_DBcv = cv_dup(proto_perl->IDBcv, param);
10041 PL_in_clean_objs = proto_perl->Iin_clean_objs;
10042 PL_in_clean_all = proto_perl->Iin_clean_all;
10044 PL_uid = proto_perl->Iuid;
10045 PL_euid = proto_perl->Ieuid;
10046 PL_gid = proto_perl->Igid;
10047 PL_egid = proto_perl->Iegid;
10048 PL_nomemok = proto_perl->Inomemok;
10049 PL_an = proto_perl->Ian;
10050 PL_cop_seqmax = proto_perl->Icop_seqmax;
10051 PL_op_seqmax = proto_perl->Iop_seqmax;
10052 PL_evalseq = proto_perl->Ievalseq;
10053 PL_origenviron = proto_perl->Iorigenviron; /* XXX not quite right */
10054 PL_origalen = proto_perl->Iorigalen;
10055 PL_pidstatus = newHV(); /* XXX flag for cloning? */
10056 PL_osname = SAVEPV(proto_perl->Iosname);
10057 PL_sh_path = proto_perl->Ish_path; /* XXX never deallocated */
10058 PL_sighandlerp = proto_perl->Isighandlerp;
10061 PL_runops = proto_perl->Irunops;
10063 Copy(proto_perl->Itokenbuf, PL_tokenbuf, 256, char);
10066 PL_cshlen = proto_perl->Icshlen;
10067 PL_cshname = proto_perl->Icshname; /* XXX never deallocated */
10070 PL_lex_state = proto_perl->Ilex_state;
10071 PL_lex_defer = proto_perl->Ilex_defer;
10072 PL_lex_expect = proto_perl->Ilex_expect;
10073 PL_lex_formbrack = proto_perl->Ilex_formbrack;
10074 PL_lex_dojoin = proto_perl->Ilex_dojoin;
10075 PL_lex_starts = proto_perl->Ilex_starts;
10076 PL_lex_stuff = sv_dup_inc(proto_perl->Ilex_stuff, param);
10077 PL_lex_repl = sv_dup_inc(proto_perl->Ilex_repl, param);
10078 PL_lex_op = proto_perl->Ilex_op;
10079 PL_lex_inpat = proto_perl->Ilex_inpat;
10080 PL_lex_inwhat = proto_perl->Ilex_inwhat;
10081 PL_lex_brackets = proto_perl->Ilex_brackets;
10082 i = (PL_lex_brackets < 120 ? 120 : PL_lex_brackets);
10083 PL_lex_brackstack = SAVEPVN(proto_perl->Ilex_brackstack,i);
10084 PL_lex_casemods = proto_perl->Ilex_casemods;
10085 i = (PL_lex_casemods < 12 ? 12 : PL_lex_casemods);
10086 PL_lex_casestack = SAVEPVN(proto_perl->Ilex_casestack,i);
10088 Copy(proto_perl->Inextval, PL_nextval, 5, YYSTYPE);
10089 Copy(proto_perl->Inexttype, PL_nexttype, 5, I32);
10090 PL_nexttoke = proto_perl->Inexttoke;
10092 PL_linestr = sv_dup_inc(proto_perl->Ilinestr, param);
10093 i = proto_perl->Ibufptr - SvPVX(proto_perl->Ilinestr);
10094 PL_bufptr = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10095 i = proto_perl->Ioldbufptr - SvPVX(proto_perl->Ilinestr);
10096 PL_oldbufptr = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10097 i = proto_perl->Ioldoldbufptr - SvPVX(proto_perl->Ilinestr);
10098 PL_oldoldbufptr = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10099 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
10100 i = proto_perl->Ilinestart - SvPVX(proto_perl->Ilinestr);
10101 PL_linestart = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10102 PL_pending_ident = proto_perl->Ipending_ident;
10103 PL_sublex_info = proto_perl->Isublex_info; /* XXX not quite right */
10105 PL_expect = proto_perl->Iexpect;
10107 PL_multi_start = proto_perl->Imulti_start;
10108 PL_multi_end = proto_perl->Imulti_end;
10109 PL_multi_open = proto_perl->Imulti_open;
10110 PL_multi_close = proto_perl->Imulti_close;
10112 PL_error_count = proto_perl->Ierror_count;
10113 PL_subline = proto_perl->Isubline;
10114 PL_subname = sv_dup_inc(proto_perl->Isubname, param);
10116 PL_min_intro_pending = proto_perl->Imin_intro_pending;
10117 PL_max_intro_pending = proto_perl->Imax_intro_pending;
10118 PL_padix = proto_perl->Ipadix;
10119 PL_padix_floor = proto_perl->Ipadix_floor;
10120 PL_pad_reset_pending = proto_perl->Ipad_reset_pending;
10122 i = proto_perl->Ilast_uni - SvPVX(proto_perl->Ilinestr);
10123 PL_last_uni = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10124 i = proto_perl->Ilast_lop - SvPVX(proto_perl->Ilinestr);
10125 PL_last_lop = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10126 PL_last_lop_op = proto_perl->Ilast_lop_op;
10127 PL_in_my = proto_perl->Iin_my;
10128 PL_in_my_stash = hv_dup(proto_perl->Iin_my_stash, param);
10130 PL_cryptseen = proto_perl->Icryptseen;
10133 PL_hints = proto_perl->Ihints;
10135 PL_amagic_generation = proto_perl->Iamagic_generation;
10137 #ifdef USE_LOCALE_COLLATE
10138 PL_collation_ix = proto_perl->Icollation_ix;
10139 PL_collation_name = SAVEPV(proto_perl->Icollation_name);
10140 PL_collation_standard = proto_perl->Icollation_standard;
10141 PL_collxfrm_base = proto_perl->Icollxfrm_base;
10142 PL_collxfrm_mult = proto_perl->Icollxfrm_mult;
10143 #endif /* USE_LOCALE_COLLATE */
10145 #ifdef USE_LOCALE_NUMERIC
10146 PL_numeric_name = SAVEPV(proto_perl->Inumeric_name);
10147 PL_numeric_standard = proto_perl->Inumeric_standard;
10148 PL_numeric_local = proto_perl->Inumeric_local;
10149 PL_numeric_radix_sv = sv_dup_inc(proto_perl->Inumeric_radix_sv, param);
10150 #endif /* !USE_LOCALE_NUMERIC */
10152 /* utf8 character classes */
10153 PL_utf8_alnum = sv_dup_inc(proto_perl->Iutf8_alnum, param);
10154 PL_utf8_alnumc = sv_dup_inc(proto_perl->Iutf8_alnumc, param);
10155 PL_utf8_ascii = sv_dup_inc(proto_perl->Iutf8_ascii, param);
10156 PL_utf8_alpha = sv_dup_inc(proto_perl->Iutf8_alpha, param);
10157 PL_utf8_space = sv_dup_inc(proto_perl->Iutf8_space, param);
10158 PL_utf8_cntrl = sv_dup_inc(proto_perl->Iutf8_cntrl, param);
10159 PL_utf8_graph = sv_dup_inc(proto_perl->Iutf8_graph, param);
10160 PL_utf8_digit = sv_dup_inc(proto_perl->Iutf8_digit, param);
10161 PL_utf8_upper = sv_dup_inc(proto_perl->Iutf8_upper, param);
10162 PL_utf8_lower = sv_dup_inc(proto_perl->Iutf8_lower, param);
10163 PL_utf8_print = sv_dup_inc(proto_perl->Iutf8_print, param);
10164 PL_utf8_punct = sv_dup_inc(proto_perl->Iutf8_punct, param);
10165 PL_utf8_xdigit = sv_dup_inc(proto_perl->Iutf8_xdigit, param);
10166 PL_utf8_mark = sv_dup_inc(proto_perl->Iutf8_mark, param);
10167 PL_utf8_toupper = sv_dup_inc(proto_perl->Iutf8_toupper, param);
10168 PL_utf8_totitle = sv_dup_inc(proto_perl->Iutf8_totitle, param);
10169 PL_utf8_tolower = sv_dup_inc(proto_perl->Iutf8_tolower, param);
10170 PL_utf8_tofold = sv_dup_inc(proto_perl->Iutf8_tofold, param);
10171 PL_utf8_idstart = sv_dup_inc(proto_perl->Iutf8_idstart, param);
10172 PL_utf8_idcont = sv_dup_inc(proto_perl->Iutf8_idcont, param);
10175 PL_last_swash_hv = Nullhv; /* reinits on demand */
10176 PL_last_swash_klen = 0;
10177 PL_last_swash_key[0]= '\0';
10178 PL_last_swash_tmps = (U8*)NULL;
10179 PL_last_swash_slen = 0;
10181 /* perly.c globals */
10182 PL_yydebug = proto_perl->Iyydebug;
10183 PL_yynerrs = proto_perl->Iyynerrs;
10184 PL_yyerrflag = proto_perl->Iyyerrflag;
10185 PL_yychar = proto_perl->Iyychar;
10186 PL_yyval = proto_perl->Iyyval;
10187 PL_yylval = proto_perl->Iyylval;
10189 PL_glob_index = proto_perl->Iglob_index;
10190 PL_srand_called = proto_perl->Isrand_called;
10191 PL_uudmap['M'] = 0; /* reinits on demand */
10192 PL_bitcount = Nullch; /* reinits on demand */
10194 if (proto_perl->Ipsig_pend) {
10195 Newz(0, PL_psig_pend, SIG_SIZE, int);
10198 PL_psig_pend = (int*)NULL;
10201 if (proto_perl->Ipsig_ptr) {
10202 Newz(0, PL_psig_ptr, SIG_SIZE, SV*);
10203 Newz(0, PL_psig_name, SIG_SIZE, SV*);
10204 for (i = 1; i < SIG_SIZE; i++) {
10205 PL_psig_ptr[i] = sv_dup_inc(proto_perl->Ipsig_ptr[i], param);
10206 PL_psig_name[i] = sv_dup_inc(proto_perl->Ipsig_name[i], param);
10210 PL_psig_ptr = (SV**)NULL;
10211 PL_psig_name = (SV**)NULL;
10214 /* thrdvar.h stuff */
10216 if (flags & CLONEf_COPY_STACKS) {
10217 /* next allocation will be PL_tmps_stack[PL_tmps_ix+1] */
10218 PL_tmps_ix = proto_perl->Ttmps_ix;
10219 PL_tmps_max = proto_perl->Ttmps_max;
10220 PL_tmps_floor = proto_perl->Ttmps_floor;
10221 Newz(50, PL_tmps_stack, PL_tmps_max, SV*);
10223 while (i <= PL_tmps_ix) {
10224 PL_tmps_stack[i] = sv_dup_inc(proto_perl->Ttmps_stack[i], param);
10228 /* next PUSHMARK() sets *(PL_markstack_ptr+1) */
10229 i = proto_perl->Tmarkstack_max - proto_perl->Tmarkstack;
10230 Newz(54, PL_markstack, i, I32);
10231 PL_markstack_max = PL_markstack + (proto_perl->Tmarkstack_max
10232 - proto_perl->Tmarkstack);
10233 PL_markstack_ptr = PL_markstack + (proto_perl->Tmarkstack_ptr
10234 - proto_perl->Tmarkstack);
10235 Copy(proto_perl->Tmarkstack, PL_markstack,
10236 PL_markstack_ptr - PL_markstack + 1, I32);
10238 /* next push_scope()/ENTER sets PL_scopestack[PL_scopestack_ix]
10239 * NOTE: unlike the others! */
10240 PL_scopestack_ix = proto_perl->Tscopestack_ix;
10241 PL_scopestack_max = proto_perl->Tscopestack_max;
10242 Newz(54, PL_scopestack, PL_scopestack_max, I32);
10243 Copy(proto_perl->Tscopestack, PL_scopestack, PL_scopestack_ix, I32);
10245 /* next push_return() sets PL_retstack[PL_retstack_ix]
10246 * NOTE: unlike the others! */
10247 PL_retstack_ix = proto_perl->Tretstack_ix;
10248 PL_retstack_max = proto_perl->Tretstack_max;
10249 Newz(54, PL_retstack, PL_retstack_max, OP*);
10250 Copy(proto_perl->Tretstack, PL_retstack, PL_retstack_ix, OP*);
10252 /* NOTE: si_dup() looks at PL_markstack */
10253 PL_curstackinfo = si_dup(proto_perl->Tcurstackinfo, param);
10255 /* PL_curstack = PL_curstackinfo->si_stack; */
10256 PL_curstack = av_dup(proto_perl->Tcurstack, param);
10257 PL_mainstack = av_dup(proto_perl->Tmainstack, param);
10259 /* next PUSHs() etc. set *(PL_stack_sp+1) */
10260 PL_stack_base = AvARRAY(PL_curstack);
10261 PL_stack_sp = PL_stack_base + (proto_perl->Tstack_sp
10262 - proto_perl->Tstack_base);
10263 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
10265 /* next SSPUSHFOO() sets PL_savestack[PL_savestack_ix]
10266 * NOTE: unlike the others! */
10267 PL_savestack_ix = proto_perl->Tsavestack_ix;
10268 PL_savestack_max = proto_perl->Tsavestack_max;
10269 /*Newz(54, PL_savestack, PL_savestack_max, ANY);*/
10270 PL_savestack = ss_dup(proto_perl, param);
10274 ENTER; /* perl_destruct() wants to LEAVE; */
10277 PL_start_env = proto_perl->Tstart_env; /* XXXXXX */
10278 PL_top_env = &PL_start_env;
10280 PL_op = proto_perl->Top;
10283 PL_Xpv = (XPV*)NULL;
10284 PL_na = proto_perl->Tna;
10286 PL_statbuf = proto_perl->Tstatbuf;
10287 PL_statcache = proto_perl->Tstatcache;
10288 PL_statgv = gv_dup(proto_perl->Tstatgv, param);
10289 PL_statname = sv_dup_inc(proto_perl->Tstatname, param);
10291 PL_timesbuf = proto_perl->Ttimesbuf;
10294 PL_tainted = proto_perl->Ttainted;
10295 PL_curpm = proto_perl->Tcurpm; /* XXX No PMOP ref count */
10296 PL_rs = sv_dup_inc(proto_perl->Trs, param);
10297 PL_last_in_gv = gv_dup(proto_perl->Tlast_in_gv, param);
10298 PL_ofs_sv = sv_dup_inc(proto_perl->Tofs_sv, param);
10299 PL_defoutgv = gv_dup_inc(proto_perl->Tdefoutgv, param);
10300 PL_chopset = proto_perl->Tchopset; /* XXX never deallocated */
10301 PL_toptarget = sv_dup_inc(proto_perl->Ttoptarget, param);
10302 PL_bodytarget = sv_dup_inc(proto_perl->Tbodytarget, param);
10303 PL_formtarget = sv_dup(proto_perl->Tformtarget, param);
10305 PL_restartop = proto_perl->Trestartop;
10306 PL_in_eval = proto_perl->Tin_eval;
10307 PL_delaymagic = proto_perl->Tdelaymagic;
10308 PL_dirty = proto_perl->Tdirty;
10309 PL_localizing = proto_perl->Tlocalizing;
10311 #ifdef PERL_FLEXIBLE_EXCEPTIONS
10312 PL_protect = proto_perl->Tprotect;
10314 PL_errors = sv_dup_inc(proto_perl->Terrors, param);
10315 PL_av_fetch_sv = Nullsv;
10316 PL_hv_fetch_sv = Nullsv;
10317 Zero(&PL_hv_fetch_ent_mh, 1, HE); /* XXX */
10318 PL_modcount = proto_perl->Tmodcount;
10319 PL_lastgotoprobe = Nullop;
10320 PL_dumpindent = proto_perl->Tdumpindent;
10322 PL_sortcop = (OP*)any_dup(proto_perl->Tsortcop, proto_perl);
10323 PL_sortstash = hv_dup(proto_perl->Tsortstash, param);
10324 PL_firstgv = gv_dup(proto_perl->Tfirstgv, param);
10325 PL_secondgv = gv_dup(proto_perl->Tsecondgv, param);
10326 PL_sortcxix = proto_perl->Tsortcxix;
10327 PL_efloatbuf = Nullch; /* reinits on demand */
10328 PL_efloatsize = 0; /* reinits on demand */
10332 PL_screamfirst = NULL;
10333 PL_screamnext = NULL;
10334 PL_maxscream = -1; /* reinits on demand */
10335 PL_lastscream = Nullsv;
10337 PL_watchaddr = NULL;
10338 PL_watchok = Nullch;
10340 PL_regdummy = proto_perl->Tregdummy;
10341 PL_regcomp_parse = Nullch;
10342 PL_regxend = Nullch;
10343 PL_regcode = (regnode*)NULL;
10346 PL_regprecomp = Nullch;
10351 PL_seen_zerolen = 0;
10353 PL_regcomp_rx = (regexp*)NULL;
10355 PL_colorset = 0; /* reinits PL_colors[] */
10356 /*PL_colors[6] = {0,0,0,0,0,0};*/
10357 PL_reg_whilem_seen = 0;
10358 PL_reginput = Nullch;
10359 PL_regbol = Nullch;
10360 PL_regeol = Nullch;
10361 PL_regstartp = (I32*)NULL;
10362 PL_regendp = (I32*)NULL;
10363 PL_reglastparen = (U32*)NULL;
10364 PL_regtill = Nullch;
10365 PL_reg_start_tmp = (char**)NULL;
10366 PL_reg_start_tmpl = 0;
10367 PL_regdata = (struct reg_data*)NULL;
10370 PL_reg_eval_set = 0;
10372 PL_regprogram = (regnode*)NULL;
10374 PL_regcc = (CURCUR*)NULL;
10375 PL_reg_call_cc = (struct re_cc_state*)NULL;
10376 PL_reg_re = (regexp*)NULL;
10377 PL_reg_ganch = Nullch;
10378 PL_reg_sv = Nullsv;
10379 PL_reg_match_utf8 = FALSE;
10380 PL_reg_magic = (MAGIC*)NULL;
10382 PL_reg_oldcurpm = (PMOP*)NULL;
10383 PL_reg_curpm = (PMOP*)NULL;
10384 PL_reg_oldsaved = Nullch;
10385 PL_reg_oldsavedlen = 0;
10386 PL_reg_maxiter = 0;
10387 PL_reg_leftiter = 0;
10388 PL_reg_poscache = Nullch;
10389 PL_reg_poscache_size= 0;
10391 /* RE engine - function pointers */
10392 PL_regcompp = proto_perl->Tregcompp;
10393 PL_regexecp = proto_perl->Tregexecp;
10394 PL_regint_start = proto_perl->Tregint_start;
10395 PL_regint_string = proto_perl->Tregint_string;
10396 PL_regfree = proto_perl->Tregfree;
10398 PL_reginterp_cnt = 0;
10399 PL_reg_starttry = 0;
10401 /* Pluggable optimizer */
10402 PL_peepp = proto_perl->Tpeepp;
10404 if (!(flags & CLONEf_KEEP_PTR_TABLE)) {
10405 ptr_table_free(PL_ptr_table);
10406 PL_ptr_table = NULL;
10409 /* Call the ->CLONE method, if it exists, for each of the stashes
10410 identified by sv_dup() above.
10412 while(av_len(param->stashes) != -1) {
10413 HV* stash = (HV*) av_shift(param->stashes);
10414 GV* cloner = gv_fetchmethod_autoload(stash, "CLONE", 0);
10415 if (cloner && GvCV(cloner)) {
10420 XPUSHs(sv_2mortal(newSVpv(HvNAME(stash), 0)));
10422 call_sv((SV*)GvCV(cloner), G_DISCARD);
10428 SvREFCNT_dec(param->stashes);
10433 #endif /* USE_ITHREADS */
10436 =head1 Unicode Support
10438 =for apidoc sv_recode_to_utf8
10440 The encoding is assumed to be an Encode object, on entry the PV
10441 of the sv is assumed to be octets in that encoding, and the sv
10442 will be converted into Unicode (and UTF-8).
10444 If the sv already is UTF-8 (or if it is not POK), or if the encoding
10445 is not a reference, nothing is done to the sv. If the encoding is not
10446 an C<Encode::XS> Encoding object, bad things will happen.
10447 (See F<lib/encoding.pm> and L<Encode>).
10449 The PV of the sv is returned.
10454 Perl_sv_recode_to_utf8(pTHX_ SV *sv, SV *encoding)
10456 if (SvPOK(sv) && !DO_UTF8(sv) && SvROK(encoding)) {
10467 XPUSHs(&PL_sv_yes);
10469 call_method("decode", G_SCALAR);
10473 s = SvPV(uni, len);
10474 if (s != SvPVX(sv)) {
10476 Move(s, SvPVX(sv), len, char);
10477 SvCUR_set(sv, len);