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)
1543 #ifdef HAS_64K_LIMIT
1544 if (newlen >= 0x10000) {
1545 PerlIO_printf(Perl_debug_log,
1546 "Allocation too large: %"UVxf"\n", (UV)newlen);
1549 #endif /* HAS_64K_LIMIT */
1552 if (SvTYPE(sv) < SVt_PV) {
1553 sv_upgrade(sv, SVt_PV);
1556 else if (SvOOK(sv)) { /* pv is offset? */
1559 if (newlen > SvLEN(sv))
1560 newlen += 10 * (newlen - SvCUR(sv)); /* avoid copy each time */
1561 #ifdef HAS_64K_LIMIT
1562 if (newlen >= 0x10000)
1568 if (newlen > SvLEN(sv)) { /* need more room? */
1569 if (SvLEN(sv) && s) {
1570 #if defined(MYMALLOC) && !defined(LEAKTEST)
1571 STRLEN l = malloced_size((void*)SvPVX(sv));
1577 Renew(s,newlen,char);
1580 /* sv_force_normal_flags() must not try to unshare the new
1581 PVX we allocate below. AMS 20010713 */
1582 if (SvREADONLY(sv) && SvFAKE(sv)) {
1586 New(703, s, newlen, char);
1587 if (SvPVX(sv) && SvCUR(sv)) {
1588 Move(SvPVX(sv), s, SvCUR(sv), char);
1592 SvLEN_set(sv, newlen);
1598 =for apidoc sv_setiv
1600 Copies an integer into the given SV, upgrading first if necessary.
1601 Does not handle 'set' magic. See also C<sv_setiv_mg>.
1607 Perl_sv_setiv(pTHX_ register SV *sv, IV i)
1609 SV_CHECK_THINKFIRST(sv);
1610 switch (SvTYPE(sv)) {
1612 sv_upgrade(sv, SVt_IV);
1615 sv_upgrade(sv, SVt_PVNV);
1619 sv_upgrade(sv, SVt_PVIV);
1628 Perl_croak(aTHX_ "Can't coerce %s to integer in %s", sv_reftype(sv,0),
1631 (void)SvIOK_only(sv); /* validate number */
1637 =for apidoc sv_setiv_mg
1639 Like C<sv_setiv>, but also handles 'set' magic.
1645 Perl_sv_setiv_mg(pTHX_ register SV *sv, IV i)
1652 =for apidoc sv_setuv
1654 Copies an unsigned integer into the given SV, upgrading first if necessary.
1655 Does not handle 'set' magic. See also C<sv_setuv_mg>.
1661 Perl_sv_setuv(pTHX_ register SV *sv, UV u)
1663 /* With these two if statements:
1664 u=1.49 s=0.52 cu=72.49 cs=10.64 scripts=270 tests=20865
1667 u=1.35 s=0.47 cu=73.45 cs=11.43 scripts=270 tests=20865
1669 If you wish to remove them, please benchmark to see what the effect is
1671 if (u <= (UV)IV_MAX) {
1672 sv_setiv(sv, (IV)u);
1681 =for apidoc sv_setuv_mg
1683 Like C<sv_setuv>, but also handles 'set' magic.
1689 Perl_sv_setuv_mg(pTHX_ register SV *sv, UV u)
1691 /* With these two if statements:
1692 u=1.49 s=0.52 cu=72.49 cs=10.64 scripts=270 tests=20865
1695 u=1.35 s=0.47 cu=73.45 cs=11.43 scripts=270 tests=20865
1697 If you wish to remove them, please benchmark to see what the effect is
1699 if (u <= (UV)IV_MAX) {
1700 sv_setiv(sv, (IV)u);
1710 =for apidoc sv_setnv
1712 Copies a double into the given SV, upgrading first if necessary.
1713 Does not handle 'set' magic. See also C<sv_setnv_mg>.
1719 Perl_sv_setnv(pTHX_ register SV *sv, NV num)
1721 SV_CHECK_THINKFIRST(sv);
1722 switch (SvTYPE(sv)) {
1725 sv_upgrade(sv, SVt_NV);
1730 sv_upgrade(sv, SVt_PVNV);
1739 Perl_croak(aTHX_ "Can't coerce %s to number in %s", sv_reftype(sv,0),
1743 (void)SvNOK_only(sv); /* validate number */
1748 =for apidoc sv_setnv_mg
1750 Like C<sv_setnv>, but also handles 'set' magic.
1756 Perl_sv_setnv_mg(pTHX_ register SV *sv, NV num)
1762 /* Print an "isn't numeric" warning, using a cleaned-up,
1763 * printable version of the offending string
1767 S_not_a_number(pTHX_ SV *sv)
1774 dsv = sv_2mortal(newSVpv("", 0));
1775 pv = sv_uni_display(dsv, sv, 10, 0);
1778 char *limit = tmpbuf + sizeof(tmpbuf) - 8;
1779 /* each *s can expand to 4 chars + "...\0",
1780 i.e. need room for 8 chars */
1783 for (s = SvPVX(sv), end = s + SvCUR(sv); s < end && d < limit; s++) {
1785 if (ch & 128 && !isPRINT_LC(ch)) {
1794 else if (ch == '\r') {
1798 else if (ch == '\f') {
1802 else if (ch == '\\') {
1806 else if (ch == '\0') {
1810 else if (isPRINT_LC(ch))
1827 Perl_warner(aTHX_ packWARN(WARN_NUMERIC),
1828 "Argument \"%s\" isn't numeric in %s", pv,
1831 Perl_warner(aTHX_ packWARN(WARN_NUMERIC),
1832 "Argument \"%s\" isn't numeric", pv);
1836 =for apidoc looks_like_number
1838 Test if the content of an SV looks like a number (or is a number).
1839 C<Inf> and C<Infinity> are treated as numbers (so will not issue a
1840 non-numeric warning), even if your atof() doesn't grok them.
1846 Perl_looks_like_number(pTHX_ SV *sv)
1848 register char *sbegin;
1855 else if (SvPOKp(sv))
1856 sbegin = SvPV(sv, len);
1858 return 1; /* Historic. Wrong? */
1859 return grok_number(sbegin, len, NULL);
1862 /* Actually, ISO C leaves conversion of UV to IV undefined, but
1863 until proven guilty, assume that things are not that bad... */
1868 As 64 bit platforms often have an NV that doesn't preserve all bits of
1869 an IV (an assumption perl has been based on to date) it becomes necessary
1870 to remove the assumption that the NV always carries enough precision to
1871 recreate the IV whenever needed, and that the NV is the canonical form.
1872 Instead, IV/UV and NV need to be given equal rights. So as to not lose
1873 precision as a side effect of conversion (which would lead to insanity
1874 and the dragon(s) in t/op/numconvert.t getting very angry) the intent is
1875 1) to distinguish between IV/UV/NV slots that have cached a valid
1876 conversion where precision was lost and IV/UV/NV slots that have a
1877 valid conversion which has lost no precision
1878 2) to ensure that if a numeric conversion to one form is requested that
1879 would lose precision, the precise conversion (or differently
1880 imprecise conversion) is also performed and cached, to prevent
1881 requests for different numeric formats on the same SV causing
1882 lossy conversion chains. (lossless conversion chains are perfectly
1887 SvIOKp is true if the IV slot contains a valid value
1888 SvIOK is true only if the IV value is accurate (UV if SvIOK_UV true)
1889 SvNOKp is true if the NV slot contains a valid value
1890 SvNOK is true only if the NV value is accurate
1893 while converting from PV to NV, check to see if converting that NV to an
1894 IV(or UV) would lose accuracy over a direct conversion from PV to
1895 IV(or UV). If it would, cache both conversions, return NV, but mark
1896 SV as IOK NOKp (ie not NOK).
1898 While converting from PV to IV, check to see if converting that IV to an
1899 NV would lose accuracy over a direct conversion from PV to NV. If it
1900 would, cache both conversions, flag similarly.
1902 Before, the SV value "3.2" could become NV=3.2 IV=3 NOK, IOK quite
1903 correctly because if IV & NV were set NV *always* overruled.
1904 Now, "3.2" will become NV=3.2 IV=3 NOK, IOKp, because the flag's meaning
1905 changes - now IV and NV together means that the two are interchangeable:
1906 SvIVX == (IV) SvNVX && SvNVX == (NV) SvIVX;
1908 The benefit of this is that operations such as pp_add know that if
1909 SvIOK is true for both left and right operands, then integer addition
1910 can be used instead of floating point (for cases where the result won't
1911 overflow). Before, floating point was always used, which could lead to
1912 loss of precision compared with integer addition.
1914 * making IV and NV equal status should make maths accurate on 64 bit
1916 * may speed up maths somewhat if pp_add and friends start to use
1917 integers when possible instead of fp. (Hopefully the overhead in
1918 looking for SvIOK and checking for overflow will not outweigh the
1919 fp to integer speedup)
1920 * will slow down integer operations (callers of SvIV) on "inaccurate"
1921 values, as the change from SvIOK to SvIOKp will cause a call into
1922 sv_2iv each time rather than a macro access direct to the IV slot
1923 * should speed up number->string conversion on integers as IV is
1924 favoured when IV and NV are equally accurate
1926 ####################################################################
1927 You had better be using SvIOK_notUV if you want an IV for arithmetic:
1928 SvIOK is true if (IV or UV), so you might be getting (IV)SvUV.
1929 On the other hand, SvUOK is true iff UV.
1930 ####################################################################
1932 Your mileage will vary depending your CPU's relative fp to integer
1936 #ifndef NV_PRESERVES_UV
1937 # define IS_NUMBER_UNDERFLOW_IV 1
1938 # define IS_NUMBER_UNDERFLOW_UV 2
1939 # define IS_NUMBER_IV_AND_UV 2
1940 # define IS_NUMBER_OVERFLOW_IV 4
1941 # define IS_NUMBER_OVERFLOW_UV 5
1943 /* sv_2iuv_non_preserve(): private routine for use by sv_2iv() and sv_2uv() */
1945 /* For sv_2nv these three cases are "SvNOK and don't bother casting" */
1947 S_sv_2iuv_non_preserve(pTHX_ register SV *sv, I32 numtype)
1949 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));
1950 if (SvNVX(sv) < (NV)IV_MIN) {
1951 (void)SvIOKp_on(sv);
1954 return IS_NUMBER_UNDERFLOW_IV;
1956 if (SvNVX(sv) > (NV)UV_MAX) {
1957 (void)SvIOKp_on(sv);
1961 return IS_NUMBER_OVERFLOW_UV;
1963 (void)SvIOKp_on(sv);
1965 /* Can't use strtol etc to convert this string. (See truth table in
1967 if (SvNVX(sv) <= (UV)IV_MAX) {
1968 SvIVX(sv) = I_V(SvNVX(sv));
1969 if ((NV)(SvIVX(sv)) == SvNVX(sv)) {
1970 SvIOK_on(sv); /* Integer is precise. NOK, IOK */
1972 /* Integer is imprecise. NOK, IOKp */
1974 return SvNVX(sv) < 0 ? IS_NUMBER_UNDERFLOW_UV : IS_NUMBER_IV_AND_UV;
1977 SvUVX(sv) = U_V(SvNVX(sv));
1978 if ((NV)(SvUVX(sv)) == SvNVX(sv)) {
1979 if (SvUVX(sv) == UV_MAX) {
1980 /* As we know that NVs don't preserve UVs, UV_MAX cannot
1981 possibly be preserved by NV. Hence, it must be overflow.
1983 return IS_NUMBER_OVERFLOW_UV;
1985 SvIOK_on(sv); /* Integer is precise. NOK, UOK */
1987 /* Integer is imprecise. NOK, IOKp */
1989 return IS_NUMBER_OVERFLOW_IV;
1991 #endif /* !NV_PRESERVES_UV*/
1996 Return the integer value of an SV, doing any necessary string conversion,
1997 magic etc. Normally used via the C<SvIV(sv)> and C<SvIVx(sv)> macros.
2003 Perl_sv_2iv(pTHX_ register SV *sv)
2007 if (SvGMAGICAL(sv)) {
2012 return I_V(SvNVX(sv));
2014 if (SvPOKp(sv) && SvLEN(sv))
2017 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
2018 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
2024 if (SvTHINKFIRST(sv)) {
2027 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,numer)) &&
2028 (SvTYPE(tmpstr) != SVt_RV || (SvRV(tmpstr) != SvRV(sv))))
2029 return SvIV(tmpstr);
2030 return PTR2IV(SvRV(sv));
2032 if (SvREADONLY(sv) && SvFAKE(sv)) {
2033 sv_force_normal(sv);
2035 if (SvREADONLY(sv) && !SvOK(sv)) {
2036 if (ckWARN(WARN_UNINITIALIZED))
2043 return (IV)(SvUVX(sv));
2050 /* erm. not sure. *should* never get NOKp (without NOK) from sv_2nv
2051 * without also getting a cached IV/UV from it at the same time
2052 * (ie PV->NV conversion should detect loss of accuracy and cache
2053 * IV or UV at same time to avoid this. NWC */
2055 if (SvTYPE(sv) == SVt_NV)
2056 sv_upgrade(sv, SVt_PVNV);
2058 (void)SvIOKp_on(sv); /* Must do this first, to clear any SvOOK */
2059 /* < not <= as for NV doesn't preserve UV, ((NV)IV_MAX+1) will almost
2060 certainly cast into the IV range at IV_MAX, whereas the correct
2061 answer is the UV IV_MAX +1. Hence < ensures that dodgy boundary
2063 if (SvNVX(sv) < (NV)IV_MAX + 0.5) {
2064 SvIVX(sv) = I_V(SvNVX(sv));
2065 if (SvNVX(sv) == (NV) SvIVX(sv)
2066 #ifndef NV_PRESERVES_UV
2067 && (((UV)1 << NV_PRESERVES_UV_BITS) >
2068 (UV)(SvIVX(sv) > 0 ? SvIVX(sv) : -SvIVX(sv)))
2069 /* Don't flag it as "accurately an integer" if the number
2070 came from a (by definition imprecise) NV operation, and
2071 we're outside the range of NV integer precision */
2074 SvIOK_on(sv); /* Can this go wrong with rounding? NWC */
2075 DEBUG_c(PerlIO_printf(Perl_debug_log,
2076 "0x%"UVxf" iv(%"NVgf" => %"IVdf") (precise)\n",
2082 /* IV not precise. No need to convert from PV, as NV
2083 conversion would already have cached IV if it detected
2084 that PV->IV would be better than PV->NV->IV
2085 flags already correct - don't set public IOK. */
2086 DEBUG_c(PerlIO_printf(Perl_debug_log,
2087 "0x%"UVxf" iv(%"NVgf" => %"IVdf") (imprecise)\n",
2092 /* Can the above go wrong if SvIVX == IV_MIN and SvNVX < IV_MIN,
2093 but the cast (NV)IV_MIN rounds to a the value less (more
2094 negative) than IV_MIN which happens to be equal to SvNVX ??
2095 Analogous to 0xFFFFFFFFFFFFFFFF rounding up to NV (2**64) and
2096 NV rounding back to 0xFFFFFFFFFFFFFFFF, so UVX == UV(NVX) and
2097 (NV)UVX == NVX are both true, but the values differ. :-(
2098 Hopefully for 2s complement IV_MIN is something like
2099 0x8000000000000000 which will be exact. NWC */
2102 SvUVX(sv) = U_V(SvNVX(sv));
2104 (SvNVX(sv) == (NV) SvUVX(sv))
2105 #ifndef NV_PRESERVES_UV
2106 /* Make sure it's not 0xFFFFFFFFFFFFFFFF */
2107 /*&& (SvUVX(sv) != UV_MAX) irrelevant with code below */
2108 && (((UV)1 << NV_PRESERVES_UV_BITS) > SvUVX(sv))
2109 /* Don't flag it as "accurately an integer" if the number
2110 came from a (by definition imprecise) NV operation, and
2111 we're outside the range of NV integer precision */
2117 DEBUG_c(PerlIO_printf(Perl_debug_log,
2118 "0x%"UVxf" 2iv(%"UVuf" => %"IVdf") (as unsigned)\n",
2122 return (IV)SvUVX(sv);
2125 else if (SvPOKp(sv) && SvLEN(sv)) {
2127 int numtype = grok_number(SvPVX(sv), SvCUR(sv), &value);
2128 /* We want to avoid a possible problem when we cache an IV which
2129 may be later translated to an NV, and the resulting NV is not
2130 the same as the direct translation of the initial string
2131 (eg 123.456 can shortcut to the IV 123 with atol(), but we must
2132 be careful to ensure that the value with the .456 is around if the
2133 NV value is requested in the future).
2135 This means that if we cache such an IV, we need to cache the
2136 NV as well. Moreover, we trade speed for space, and do not
2137 cache the NV if we are sure it's not needed.
2140 /* SVt_PVNV is one higher than SVt_PVIV, hence this order */
2141 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2142 == IS_NUMBER_IN_UV) {
2143 /* It's definitely an integer, only upgrade to PVIV */
2144 if (SvTYPE(sv) < SVt_PVIV)
2145 sv_upgrade(sv, SVt_PVIV);
2147 } else if (SvTYPE(sv) < SVt_PVNV)
2148 sv_upgrade(sv, SVt_PVNV);
2150 /* If NV preserves UV then we only use the UV value if we know that
2151 we aren't going to call atof() below. If NVs don't preserve UVs
2152 then the value returned may have more precision than atof() will
2153 return, even though value isn't perfectly accurate. */
2154 if ((numtype & (IS_NUMBER_IN_UV
2155 #ifdef NV_PRESERVES_UV
2158 )) == IS_NUMBER_IN_UV) {
2159 /* This won't turn off the public IOK flag if it was set above */
2160 (void)SvIOKp_on(sv);
2162 if (!(numtype & IS_NUMBER_NEG)) {
2164 if (value <= (UV)IV_MAX) {
2165 SvIVX(sv) = (IV)value;
2171 /* 2s complement assumption */
2172 if (value <= (UV)IV_MIN) {
2173 SvIVX(sv) = -(IV)value;
2175 /* Too negative for an IV. This is a double upgrade, but
2176 I'm assuming it will be rare. */
2177 if (SvTYPE(sv) < SVt_PVNV)
2178 sv_upgrade(sv, SVt_PVNV);
2182 SvNVX(sv) = -(NV)value;
2187 /* For !NV_PRESERVES_UV and IS_NUMBER_IN_UV and IS_NUMBER_NOT_INT we
2188 will be in the previous block to set the IV slot, and the next
2189 block to set the NV slot. So no else here. */
2191 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2192 != IS_NUMBER_IN_UV) {
2193 /* It wasn't an (integer that doesn't overflow the UV). */
2194 SvNVX(sv) = Atof(SvPVX(sv));
2196 if (! numtype && ckWARN(WARN_NUMERIC))
2199 #if defined(USE_LONG_DOUBLE)
2200 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2iv(%" PERL_PRIgldbl ")\n",
2201 PTR2UV(sv), SvNVX(sv)));
2203 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2iv(%"NVgf")\n",
2204 PTR2UV(sv), SvNVX(sv)));
2208 #ifdef NV_PRESERVES_UV
2209 (void)SvIOKp_on(sv);
2211 if (SvNVX(sv) < (NV)IV_MAX + 0.5) {
2212 SvIVX(sv) = I_V(SvNVX(sv));
2213 if ((NV)(SvIVX(sv)) == SvNVX(sv)) {
2216 /* Integer is imprecise. NOK, IOKp */
2218 /* UV will not work better than IV */
2220 if (SvNVX(sv) > (NV)UV_MAX) {
2222 /* Integer is inaccurate. NOK, IOKp, is UV */
2226 SvUVX(sv) = U_V(SvNVX(sv));
2227 /* 0xFFFFFFFFFFFFFFFF not an issue in here */
2228 if ((NV)(SvUVX(sv)) == SvNVX(sv)) {
2232 /* Integer is imprecise. NOK, IOKp, is UV */
2238 #else /* NV_PRESERVES_UV */
2239 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2240 == (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT)) {
2241 /* The IV slot will have been set from value returned by
2242 grok_number above. The NV slot has just been set using
2245 assert (SvIOKp(sv));
2247 if (((UV)1 << NV_PRESERVES_UV_BITS) >
2248 U_V(SvNVX(sv) > 0 ? SvNVX(sv) : -SvNVX(sv))) {
2249 /* Small enough to preserve all bits. */
2250 (void)SvIOKp_on(sv);
2252 SvIVX(sv) = I_V(SvNVX(sv));
2253 if ((NV)(SvIVX(sv)) == SvNVX(sv))
2255 /* Assumption: first non-preserved integer is < IV_MAX,
2256 this NV is in the preserved range, therefore: */
2257 if (!(U_V(SvNVX(sv) > 0 ? SvNVX(sv) : -SvNVX(sv))
2259 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);
2263 0 0 already failed to read UV.
2264 0 1 already failed to read UV.
2265 1 0 you won't get here in this case. IV/UV
2266 slot set, public IOK, Atof() unneeded.
2267 1 1 already read UV.
2268 so there's no point in sv_2iuv_non_preserve() attempting
2269 to use atol, strtol, strtoul etc. */
2270 if (sv_2iuv_non_preserve (sv, numtype)
2271 >= IS_NUMBER_OVERFLOW_IV)
2275 #endif /* NV_PRESERVES_UV */
2278 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP))
2280 if (SvTYPE(sv) < SVt_IV)
2281 /* Typically the caller expects that sv_any is not NULL now. */
2282 sv_upgrade(sv, SVt_IV);
2285 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2iv(%"IVdf")\n",
2286 PTR2UV(sv),SvIVX(sv)));
2287 return SvIsUV(sv) ? (IV)SvUVX(sv) : SvIVX(sv);
2293 Return the unsigned integer value of an SV, doing any necessary string
2294 conversion, magic etc. Normally used via the C<SvUV(sv)> and C<SvUVx(sv)>
2301 Perl_sv_2uv(pTHX_ register SV *sv)
2305 if (SvGMAGICAL(sv)) {
2310 return U_V(SvNVX(sv));
2311 if (SvPOKp(sv) && SvLEN(sv))
2314 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
2315 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
2321 if (SvTHINKFIRST(sv)) {
2324 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,numer)) &&
2325 (SvTYPE(tmpstr) != SVt_RV || (SvRV(tmpstr) != SvRV(sv))))
2326 return SvUV(tmpstr);
2327 return PTR2UV(SvRV(sv));
2329 if (SvREADONLY(sv) && SvFAKE(sv)) {
2330 sv_force_normal(sv);
2332 if (SvREADONLY(sv) && !SvOK(sv)) {
2333 if (ckWARN(WARN_UNINITIALIZED))
2343 return (UV)SvIVX(sv);
2347 /* erm. not sure. *should* never get NOKp (without NOK) from sv_2nv
2348 * without also getting a cached IV/UV from it at the same time
2349 * (ie PV->NV conversion should detect loss of accuracy and cache
2350 * IV or UV at same time to avoid this. */
2351 /* IV-over-UV optimisation - choose to cache IV if possible */
2353 if (SvTYPE(sv) == SVt_NV)
2354 sv_upgrade(sv, SVt_PVNV);
2356 (void)SvIOKp_on(sv); /* Must do this first, to clear any SvOOK */
2357 if (SvNVX(sv) < (NV)IV_MAX + 0.5) {
2358 SvIVX(sv) = I_V(SvNVX(sv));
2359 if (SvNVX(sv) == (NV) SvIVX(sv)
2360 #ifndef NV_PRESERVES_UV
2361 && (((UV)1 << NV_PRESERVES_UV_BITS) >
2362 (UV)(SvIVX(sv) > 0 ? SvIVX(sv) : -SvIVX(sv)))
2363 /* Don't flag it as "accurately an integer" if the number
2364 came from a (by definition imprecise) NV operation, and
2365 we're outside the range of NV integer precision */
2368 SvIOK_on(sv); /* Can this go wrong with rounding? NWC */
2369 DEBUG_c(PerlIO_printf(Perl_debug_log,
2370 "0x%"UVxf" uv(%"NVgf" => %"IVdf") (precise)\n",
2376 /* IV not precise. No need to convert from PV, as NV
2377 conversion would already have cached IV if it detected
2378 that PV->IV would be better than PV->NV->IV
2379 flags already correct - don't set public IOK. */
2380 DEBUG_c(PerlIO_printf(Perl_debug_log,
2381 "0x%"UVxf" uv(%"NVgf" => %"IVdf") (imprecise)\n",
2386 /* Can the above go wrong if SvIVX == IV_MIN and SvNVX < IV_MIN,
2387 but the cast (NV)IV_MIN rounds to a the value less (more
2388 negative) than IV_MIN which happens to be equal to SvNVX ??
2389 Analogous to 0xFFFFFFFFFFFFFFFF rounding up to NV (2**64) and
2390 NV rounding back to 0xFFFFFFFFFFFFFFFF, so UVX == UV(NVX) and
2391 (NV)UVX == NVX are both true, but the values differ. :-(
2392 Hopefully for 2s complement IV_MIN is something like
2393 0x8000000000000000 which will be exact. NWC */
2396 SvUVX(sv) = U_V(SvNVX(sv));
2398 (SvNVX(sv) == (NV) SvUVX(sv))
2399 #ifndef NV_PRESERVES_UV
2400 /* Make sure it's not 0xFFFFFFFFFFFFFFFF */
2401 /*&& (SvUVX(sv) != UV_MAX) irrelevant with code below */
2402 && (((UV)1 << NV_PRESERVES_UV_BITS) > SvUVX(sv))
2403 /* Don't flag it as "accurately an integer" if the number
2404 came from a (by definition imprecise) NV operation, and
2405 we're outside the range of NV integer precision */
2410 DEBUG_c(PerlIO_printf(Perl_debug_log,
2411 "0x%"UVxf" 2uv(%"UVuf" => %"IVdf") (as unsigned)\n",
2417 else if (SvPOKp(sv) && SvLEN(sv)) {
2419 int numtype = grok_number(SvPVX(sv), SvCUR(sv), &value);
2421 /* We want to avoid a possible problem when we cache a UV which
2422 may be later translated to an NV, and the resulting NV is not
2423 the translation of the initial data.
2425 This means that if we cache such a UV, we need to cache the
2426 NV as well. Moreover, we trade speed for space, and do not
2427 cache the NV if not needed.
2430 /* SVt_PVNV is one higher than SVt_PVIV, hence this order */
2431 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2432 == IS_NUMBER_IN_UV) {
2433 /* It's definitely an integer, only upgrade to PVIV */
2434 if (SvTYPE(sv) < SVt_PVIV)
2435 sv_upgrade(sv, SVt_PVIV);
2437 } else if (SvTYPE(sv) < SVt_PVNV)
2438 sv_upgrade(sv, SVt_PVNV);
2440 /* If NV preserves UV then we only use the UV value if we know that
2441 we aren't going to call atof() below. If NVs don't preserve UVs
2442 then the value returned may have more precision than atof() will
2443 return, even though it isn't accurate. */
2444 if ((numtype & (IS_NUMBER_IN_UV
2445 #ifdef NV_PRESERVES_UV
2448 )) == IS_NUMBER_IN_UV) {
2449 /* This won't turn off the public IOK flag if it was set above */
2450 (void)SvIOKp_on(sv);
2452 if (!(numtype & IS_NUMBER_NEG)) {
2454 if (value <= (UV)IV_MAX) {
2455 SvIVX(sv) = (IV)value;
2457 /* it didn't overflow, and it was positive. */
2462 /* 2s complement assumption */
2463 if (value <= (UV)IV_MIN) {
2464 SvIVX(sv) = -(IV)value;
2466 /* Too negative for an IV. This is a double upgrade, but
2467 I'm assuming it will be rare. */
2468 if (SvTYPE(sv) < SVt_PVNV)
2469 sv_upgrade(sv, SVt_PVNV);
2473 SvNVX(sv) = -(NV)value;
2479 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2480 != IS_NUMBER_IN_UV) {
2481 /* It wasn't an integer, or it overflowed the UV. */
2482 SvNVX(sv) = Atof(SvPVX(sv));
2484 if (! numtype && ckWARN(WARN_NUMERIC))
2487 #if defined(USE_LONG_DOUBLE)
2488 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2uv(%" PERL_PRIgldbl ")\n",
2489 PTR2UV(sv), SvNVX(sv)));
2491 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2uv(%"NVgf")\n",
2492 PTR2UV(sv), SvNVX(sv)));
2495 #ifdef NV_PRESERVES_UV
2496 (void)SvIOKp_on(sv);
2498 if (SvNVX(sv) < (NV)IV_MAX + 0.5) {
2499 SvIVX(sv) = I_V(SvNVX(sv));
2500 if ((NV)(SvIVX(sv)) == SvNVX(sv)) {
2503 /* Integer is imprecise. NOK, IOKp */
2505 /* UV will not work better than IV */
2507 if (SvNVX(sv) > (NV)UV_MAX) {
2509 /* Integer is inaccurate. NOK, IOKp, is UV */
2513 SvUVX(sv) = U_V(SvNVX(sv));
2514 /* 0xFFFFFFFFFFFFFFFF not an issue in here, NVs
2515 NV preservse UV so can do correct comparison. */
2516 if ((NV)(SvUVX(sv)) == SvNVX(sv)) {
2520 /* Integer is imprecise. NOK, IOKp, is UV */
2525 #else /* NV_PRESERVES_UV */
2526 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2527 == (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT)) {
2528 /* The UV slot will have been set from value returned by
2529 grok_number above. The NV slot has just been set using
2532 assert (SvIOKp(sv));
2534 if (((UV)1 << NV_PRESERVES_UV_BITS) >
2535 U_V(SvNVX(sv) > 0 ? SvNVX(sv) : -SvNVX(sv))) {
2536 /* Small enough to preserve all bits. */
2537 (void)SvIOKp_on(sv);
2539 SvIVX(sv) = I_V(SvNVX(sv));
2540 if ((NV)(SvIVX(sv)) == SvNVX(sv))
2542 /* Assumption: first non-preserved integer is < IV_MAX,
2543 this NV is in the preserved range, therefore: */
2544 if (!(U_V(SvNVX(sv) > 0 ? SvNVX(sv) : -SvNVX(sv))
2546 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);
2549 sv_2iuv_non_preserve (sv, numtype);
2551 #endif /* NV_PRESERVES_UV */
2555 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
2556 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
2559 if (SvTYPE(sv) < SVt_IV)
2560 /* Typically the caller expects that sv_any is not NULL now. */
2561 sv_upgrade(sv, SVt_IV);
2565 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2uv(%"UVuf")\n",
2566 PTR2UV(sv),SvUVX(sv)));
2567 return SvIsUV(sv) ? SvUVX(sv) : (UV)SvIVX(sv);
2573 Return the num value of an SV, doing any necessary string or integer
2574 conversion, magic etc. Normally used via the C<SvNV(sv)> and C<SvNVx(sv)>
2581 Perl_sv_2nv(pTHX_ register SV *sv)
2585 if (SvGMAGICAL(sv)) {
2589 if (SvPOKp(sv) && SvLEN(sv)) {
2590 if (ckWARN(WARN_NUMERIC) && !SvIOKp(sv) &&
2591 !grok_number(SvPVX(sv), SvCUR(sv), NULL))
2593 return Atof(SvPVX(sv));
2597 return (NV)SvUVX(sv);
2599 return (NV)SvIVX(sv);
2602 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
2603 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
2609 if (SvTHINKFIRST(sv)) {
2612 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,numer)) &&
2613 (SvTYPE(tmpstr) != SVt_RV || (SvRV(tmpstr) != SvRV(sv))))
2614 return SvNV(tmpstr);
2615 return PTR2NV(SvRV(sv));
2617 if (SvREADONLY(sv) && SvFAKE(sv)) {
2618 sv_force_normal(sv);
2620 if (SvREADONLY(sv) && !SvOK(sv)) {
2621 if (ckWARN(WARN_UNINITIALIZED))
2626 if (SvTYPE(sv) < SVt_NV) {
2627 if (SvTYPE(sv) == SVt_IV)
2628 sv_upgrade(sv, SVt_PVNV);
2630 sv_upgrade(sv, SVt_NV);
2631 #ifdef USE_LONG_DOUBLE
2633 STORE_NUMERIC_LOCAL_SET_STANDARD();
2634 PerlIO_printf(Perl_debug_log,
2635 "0x%"UVxf" num(%" PERL_PRIgldbl ")\n",
2636 PTR2UV(sv), SvNVX(sv));
2637 RESTORE_NUMERIC_LOCAL();
2641 STORE_NUMERIC_LOCAL_SET_STANDARD();
2642 PerlIO_printf(Perl_debug_log, "0x%"UVxf" num(%"NVgf")\n",
2643 PTR2UV(sv), SvNVX(sv));
2644 RESTORE_NUMERIC_LOCAL();
2648 else if (SvTYPE(sv) < SVt_PVNV)
2649 sv_upgrade(sv, SVt_PVNV);
2654 SvNVX(sv) = SvIsUV(sv) ? (NV)SvUVX(sv) : (NV)SvIVX(sv);
2655 #ifdef NV_PRESERVES_UV
2658 /* Only set the public NV OK flag if this NV preserves the IV */
2659 /* Check it's not 0xFFFFFFFFFFFFFFFF */
2660 if (SvIsUV(sv) ? ((SvUVX(sv) != UV_MAX)&&(SvUVX(sv) == U_V(SvNVX(sv))))
2661 : (SvIVX(sv) == I_V(SvNVX(sv))))
2667 else if (SvPOKp(sv) && SvLEN(sv)) {
2669 int numtype = grok_number(SvPVX(sv), SvCUR(sv), &value);
2670 if (ckWARN(WARN_NUMERIC) && !SvIOKp(sv) && !numtype)
2672 #ifdef NV_PRESERVES_UV
2673 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2674 == IS_NUMBER_IN_UV) {
2675 /* It's definitely an integer */
2676 SvNVX(sv) = (numtype & IS_NUMBER_NEG) ? -(NV)value : (NV)value;
2678 SvNVX(sv) = Atof(SvPVX(sv));
2681 SvNVX(sv) = Atof(SvPVX(sv));
2682 /* Only set the public NV OK flag if this NV preserves the value in
2683 the PV at least as well as an IV/UV would.
2684 Not sure how to do this 100% reliably. */
2685 /* if that shift count is out of range then Configure's test is
2686 wonky. We shouldn't be in here with NV_PRESERVES_UV_BITS ==
2688 if (((UV)1 << NV_PRESERVES_UV_BITS) >
2689 U_V(SvNVX(sv) > 0 ? SvNVX(sv) : -SvNVX(sv))) {
2690 SvNOK_on(sv); /* Definitely small enough to preserve all bits */
2691 } else if (!(numtype & IS_NUMBER_IN_UV)) {
2692 /* Can't use strtol etc to convert this string, so don't try.
2693 sv_2iv and sv_2uv will use the NV to convert, not the PV. */
2696 /* value has been set. It may not be precise. */
2697 if ((numtype & IS_NUMBER_NEG) && (value > (UV)IV_MIN)) {
2698 /* 2s complement assumption for (UV)IV_MIN */
2699 SvNOK_on(sv); /* Integer is too negative. */
2704 if (numtype & IS_NUMBER_NEG) {
2705 SvIVX(sv) = -(IV)value;
2706 } else if (value <= (UV)IV_MAX) {
2707 SvIVX(sv) = (IV)value;
2713 if (numtype & IS_NUMBER_NOT_INT) {
2714 /* I believe that even if the original PV had decimals,
2715 they are lost beyond the limit of the FP precision.
2716 However, neither is canonical, so both only get p
2717 flags. NWC, 2000/11/25 */
2718 /* Both already have p flags, so do nothing */
2721 if (SvNVX(sv) < (NV)IV_MAX + 0.5) {
2722 if (SvIVX(sv) == I_V(nv)) {
2727 /* It had no "." so it must be integer. */
2730 /* between IV_MAX and NV(UV_MAX).
2731 Could be slightly > UV_MAX */
2733 if (numtype & IS_NUMBER_NOT_INT) {
2734 /* UV and NV both imprecise. */
2736 UV nv_as_uv = U_V(nv);
2738 if (value == nv_as_uv && SvUVX(sv) != UV_MAX) {
2749 #endif /* NV_PRESERVES_UV */
2752 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP))
2754 if (SvTYPE(sv) < SVt_NV)
2755 /* Typically the caller expects that sv_any is not NULL now. */
2756 /* XXX Ilya implies that this is a bug in callers that assume this
2757 and ideally should be fixed. */
2758 sv_upgrade(sv, SVt_NV);
2761 #if defined(USE_LONG_DOUBLE)
2763 STORE_NUMERIC_LOCAL_SET_STANDARD();
2764 PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2nv(%" PERL_PRIgldbl ")\n",
2765 PTR2UV(sv), SvNVX(sv));
2766 RESTORE_NUMERIC_LOCAL();
2770 STORE_NUMERIC_LOCAL_SET_STANDARD();
2771 PerlIO_printf(Perl_debug_log, "0x%"UVxf" 1nv(%"NVgf")\n",
2772 PTR2UV(sv), SvNVX(sv));
2773 RESTORE_NUMERIC_LOCAL();
2779 /* asIV(): extract an integer from the string value of an SV.
2780 * Caller must validate PVX */
2783 S_asIV(pTHX_ SV *sv)
2786 int numtype = grok_number(SvPVX(sv), SvCUR(sv), &value);
2788 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2789 == IS_NUMBER_IN_UV) {
2790 /* It's definitely an integer */
2791 if (numtype & IS_NUMBER_NEG) {
2792 if (value < (UV)IV_MIN)
2795 if (value < (UV)IV_MAX)
2800 if (ckWARN(WARN_NUMERIC))
2803 return I_V(Atof(SvPVX(sv)));
2806 /* asUV(): extract an unsigned integer from the string value of an SV
2807 * Caller must validate PVX */
2810 S_asUV(pTHX_ SV *sv)
2813 int numtype = grok_number(SvPVX(sv), SvCUR(sv), &value);
2815 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2816 == IS_NUMBER_IN_UV) {
2817 /* It's definitely an integer */
2818 if (!(numtype & IS_NUMBER_NEG))
2822 if (ckWARN(WARN_NUMERIC))
2825 return U_V(Atof(SvPVX(sv)));
2829 =for apidoc sv_2pv_nolen
2831 Like C<sv_2pv()>, but doesn't return the length too. You should usually
2832 use the macro wrapper C<SvPV_nolen(sv)> instead.
2837 Perl_sv_2pv_nolen(pTHX_ register SV *sv)
2840 return sv_2pv(sv, &n_a);
2843 /* uiv_2buf(): private routine for use by sv_2pv_flags(): print an IV or
2844 * UV as a string towards the end of buf, and return pointers to start and
2847 * We assume that buf is at least TYPE_CHARS(UV) long.
2851 uiv_2buf(char *buf, IV iv, UV uv, int is_uv, char **peob)
2853 char *ptr = buf + TYPE_CHARS(UV);
2867 *--ptr = '0' + (uv % 10);
2875 /* For backwards-compatibility only. sv_2pv() is normally #def'ed to
2876 * C<sv_2pv_macro()>. See also C<sv_2pv_flags()>.
2880 Perl_sv_2pv(pTHX_ register SV *sv, STRLEN *lp)
2882 return sv_2pv_flags(sv, lp, SV_GMAGIC);
2886 =for apidoc sv_2pv_flags
2888 Returns a pointer to the string value of an SV, and sets *lp to its length.
2889 If flags includes SV_GMAGIC, does an mg_get() first. Coerces sv to a string
2891 Normally invoked via the C<SvPV_flags> macro. C<sv_2pv()> and C<sv_2pv_nomg>
2892 usually end up here too.
2898 Perl_sv_2pv_flags(pTHX_ register SV *sv, STRLEN *lp, I32 flags)
2903 char tbuf[64]; /* Must fit sprintf/Gconvert of longest IV/NV */
2904 char *tmpbuf = tbuf;
2910 if (SvGMAGICAL(sv)) {
2911 if (flags & SV_GMAGIC)
2919 (void)sprintf(tmpbuf,"%"UVuf, (UV)SvUVX(sv));
2921 (void)sprintf(tmpbuf,"%"IVdf, (IV)SvIVX(sv));
2926 Gconvert(SvNVX(sv), NV_DIG, 0, tmpbuf);
2931 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
2932 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
2939 if (SvTHINKFIRST(sv)) {
2942 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,string)) &&
2943 (SvTYPE(tmpstr) != SVt_RV || (SvRV(tmpstr) != SvRV(sv))))
2944 return SvPV(tmpstr,*lp);
2951 switch (SvTYPE(sv)) {
2953 if ( ((SvFLAGS(sv) &
2954 (SVs_OBJECT|SVf_OK|SVs_GMG|SVs_SMG|SVs_RMG))
2955 == (SVs_OBJECT|SVs_RMG))
2956 && strEQ(s=HvNAME(SvSTASH(sv)), "Regexp")
2957 && (mg = mg_find(sv, PERL_MAGIC_qr))) {
2958 regexp *re = (regexp *)mg->mg_obj;
2961 char *fptr = "msix";
2966 U16 reganch = (re->reganch & PMf_COMPILETIME) >> 12;
2968 while((ch = *fptr++)) {
2970 reflags[left++] = ch;
2973 reflags[right--] = ch;
2978 reflags[left] = '-';
2982 mg->mg_len = re->prelen + 4 + left;
2983 New(616, mg->mg_ptr, mg->mg_len + 1 + left, char);
2984 Copy("(?", mg->mg_ptr, 2, char);
2985 Copy(reflags, mg->mg_ptr+2, left, char);
2986 Copy(":", mg->mg_ptr+left+2, 1, char);
2987 Copy(re->precomp, mg->mg_ptr+3+left, re->prelen, char);
2988 mg->mg_ptr[mg->mg_len - 1] = ')';
2989 mg->mg_ptr[mg->mg_len] = 0;
2991 PL_reginterp_cnt += re->program[0].next_off;
3003 case SVt_PVBM: if (SvROK(sv))
3006 s = "SCALAR"; break;
3007 case SVt_PVLV: s = "LVALUE"; break;
3008 case SVt_PVAV: s = "ARRAY"; break;
3009 case SVt_PVHV: s = "HASH"; break;
3010 case SVt_PVCV: s = "CODE"; break;
3011 case SVt_PVGV: s = "GLOB"; break;
3012 case SVt_PVFM: s = "FORMAT"; break;
3013 case SVt_PVIO: s = "IO"; break;
3014 default: s = "UNKNOWN"; break;
3018 HV *svs = SvSTASH(sv);
3021 /* [20011101.072] This bandaid for C<package;>
3022 should eventually be removed. AMS 20011103 */
3023 (svs ? HvNAME(svs) : "<none>"), s
3028 Perl_sv_catpvf(aTHX_ tsv, "(0x%"UVxf")", PTR2UV(sv));
3034 if (SvREADONLY(sv) && !SvOK(sv)) {
3035 if (ckWARN(WARN_UNINITIALIZED))
3041 if (SvIOK(sv) || ((SvIOKp(sv) && !SvNOKp(sv)))) {
3042 /* I'm assuming that if both IV and NV are equally valid then
3043 converting the IV is going to be more efficient */
3044 U32 isIOK = SvIOK(sv);
3045 U32 isUIOK = SvIsUV(sv);
3046 char buf[TYPE_CHARS(UV)];
3049 if (SvTYPE(sv) < SVt_PVIV)
3050 sv_upgrade(sv, SVt_PVIV);
3052 ptr = uiv_2buf(buf, 0, SvUVX(sv), 1, &ebuf);
3054 ptr = uiv_2buf(buf, SvIVX(sv), 0, 0, &ebuf);
3055 SvGROW(sv, ebuf - ptr + 1); /* inlined from sv_setpvn */
3056 Move(ptr,SvPVX(sv),ebuf - ptr,char);
3057 SvCUR_set(sv, ebuf - ptr);
3067 else if (SvNOKp(sv)) {
3068 if (SvTYPE(sv) < SVt_PVNV)
3069 sv_upgrade(sv, SVt_PVNV);
3070 /* The +20 is pure guesswork. Configure test needed. --jhi */
3071 SvGROW(sv, NV_DIG + 20);
3073 olderrno = errno; /* some Xenix systems wipe out errno here */
3075 if (SvNVX(sv) == 0.0)
3076 (void)strcpy(s,"0");
3080 Gconvert(SvNVX(sv), NV_DIG, 0, s);
3083 #ifdef FIXNEGATIVEZERO
3084 if (*s == '-' && s[1] == '0' && !s[2])
3094 if (ckWARN(WARN_UNINITIALIZED)
3095 && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP))
3098 if (SvTYPE(sv) < SVt_PV)
3099 /* Typically the caller expects that sv_any is not NULL now. */
3100 sv_upgrade(sv, SVt_PV);
3103 *lp = s - SvPVX(sv);
3106 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2pv(%s)\n",
3107 PTR2UV(sv),SvPVX(sv)));
3111 if (SvROK(sv)) { /* XXX Skip this when sv_pvn_force calls */
3112 /* Sneaky stuff here */
3116 tsv = newSVpv(tmpbuf, 0);
3132 len = strlen(tmpbuf);
3134 #ifdef FIXNEGATIVEZERO
3135 if (len == 2 && t[0] == '-' && t[1] == '0') {
3140 (void)SvUPGRADE(sv, SVt_PV);
3142 s = SvGROW(sv, len + 1);
3151 =for apidoc sv_copypv
3153 Copies a stringified representation of the source SV into the
3154 destination SV. Automatically performs any necessary mg_get and
3155 coercion of numeric values into strings. Guaranteed to preserve
3156 UTF-8 flag even from overloaded objects. Similar in nature to
3157 sv_2pv[_flags] but operates directly on an SV instead of just the
3158 string. Mostly uses sv_2pv_flags to do its work, except when that
3159 would lose the UTF-8'ness of the PV.
3165 Perl_sv_copypv(pTHX_ SV *dsv, register SV *ssv)
3167 SV *tmpsv = sv_newmortal();
3169 if ( SvTHINKFIRST(ssv) && SvROK(ssv) && SvAMAGIC(ssv) ) {
3170 tmpsv = AMG_CALLun(ssv,string);
3171 if (SvTYPE(tmpsv) != SVt_RV || (SvRV(tmpsv) != SvRV(ssv))) {
3180 sv_setpvn(tmpsv,s,len);
3190 =for apidoc sv_2pvbyte_nolen
3192 Return a pointer to the byte-encoded representation of the SV.
3193 May cause the SV to be downgraded from UTF8 as a side-effect.
3195 Usually accessed via the C<SvPVbyte_nolen> macro.
3201 Perl_sv_2pvbyte_nolen(pTHX_ register SV *sv)
3204 return sv_2pvbyte(sv, &n_a);
3208 =for apidoc sv_2pvbyte
3210 Return a pointer to the byte-encoded representation of the SV, and set *lp
3211 to its length. May cause the SV to be downgraded from UTF8 as a
3214 Usually accessed via the C<SvPVbyte> macro.
3220 Perl_sv_2pvbyte(pTHX_ register SV *sv, STRLEN *lp)
3222 sv_utf8_downgrade(sv,0);
3223 return SvPV(sv,*lp);
3227 =for apidoc sv_2pvutf8_nolen
3229 Return a pointer to the UTF8-encoded representation of the SV.
3230 May cause the SV to be upgraded to UTF8 as a side-effect.
3232 Usually accessed via the C<SvPVutf8_nolen> macro.
3238 Perl_sv_2pvutf8_nolen(pTHX_ register SV *sv)
3241 return sv_2pvutf8(sv, &n_a);
3245 =for apidoc sv_2pvutf8
3247 Return a pointer to the UTF8-encoded representation of the SV, and set *lp
3248 to its length. May cause the SV to be upgraded to UTF8 as a side-effect.
3250 Usually accessed via the C<SvPVutf8> macro.
3256 Perl_sv_2pvutf8(pTHX_ register SV *sv, STRLEN *lp)
3258 sv_utf8_upgrade(sv);
3259 return SvPV(sv,*lp);
3263 =for apidoc sv_2bool
3265 This function is only called on magical items, and is only used by
3266 sv_true() or its macro equivalent.
3272 Perl_sv_2bool(pTHX_ register SV *sv)
3281 if (SvAMAGIC(sv) && (tmpsv=AMG_CALLun(sv,bool_)) &&
3282 (!SvROK(tmpsv) || (SvRV(tmpsv) != SvRV(sv))))
3283 return SvTRUE(tmpsv);
3284 return SvRV(sv) != 0;
3287 register XPV* Xpvtmp;
3288 if ((Xpvtmp = (XPV*)SvANY(sv)) &&
3289 (*Xpvtmp->xpv_pv > '0' ||
3290 Xpvtmp->xpv_cur > 1 ||
3291 (Xpvtmp->xpv_cur && *Xpvtmp->xpv_pv != '0')))
3298 return SvIVX(sv) != 0;
3301 return SvNVX(sv) != 0.0;
3309 =for apidoc sv_utf8_upgrade
3311 Convert the PV of an SV to its UTF8-encoded form.
3312 Forces the SV to string form if it is not already.
3313 Always sets the SvUTF8 flag to avoid future validity checks even
3314 if all the bytes have hibit clear.
3316 This is not as a general purpose byte encoding to Unicode interface:
3317 use the Encode extension for that.
3323 Perl_sv_utf8_upgrade(pTHX_ register SV *sv)
3325 return sv_utf8_upgrade_flags(sv, SV_GMAGIC);
3329 =for apidoc sv_utf8_upgrade_flags
3331 Convert the PV of an SV to its UTF8-encoded form.
3332 Forces the SV to string form if it is not already.
3333 Always sets the SvUTF8 flag to avoid future validity checks even
3334 if all the bytes have hibit clear. If C<flags> has C<SV_GMAGIC> bit set,
3335 will C<mg_get> on C<sv> if appropriate, else not. C<sv_utf8_upgrade> and
3336 C<sv_utf8_upgrade_nomg> are implemented in terms of this function.
3338 This is not as a general purpose byte encoding to Unicode interface:
3339 use the Encode extension for that.
3345 Perl_sv_utf8_upgrade_flags(pTHX_ register SV *sv, I32 flags)
3355 (void) sv_2pv_flags(sv,&len, flags);
3363 if (SvREADONLY(sv) && SvFAKE(sv)) {
3364 sv_force_normal(sv);
3368 sv_recode_to_utf8(sv, PL_encoding);
3369 else { /* Assume Latin-1/EBCDIC */
3370 /* This function could be much more efficient if we
3371 * had a FLAG in SVs to signal if there are any hibit
3372 * chars in the PV. Given that there isn't such a flag
3373 * make the loop as fast as possible. */
3374 s = (U8 *) SvPVX(sv);
3375 e = (U8 *) SvEND(sv);
3379 if ((hibit = !NATIVE_IS_INVARIANT(ch)))
3385 len = SvCUR(sv) + 1; /* Plus the \0 */
3386 SvPVX(sv) = (char*)bytes_to_utf8((U8*)s, &len);
3387 SvCUR(sv) = len - 1;
3389 Safefree(s); /* No longer using what was there before. */
3390 SvLEN(sv) = len; /* No longer know the real size. */
3392 /* Mark as UTF-8 even if no hibit - saves scanning loop */
3399 =for apidoc sv_utf8_downgrade
3401 Attempt to convert the PV of an SV from UTF8-encoded to byte encoding.
3402 This may not be possible if the PV contains non-byte encoding characters;
3403 if this is the case, either returns false or, if C<fail_ok> is not
3406 This is not as a general purpose Unicode to byte encoding interface:
3407 use the Encode extension for that.
3413 Perl_sv_utf8_downgrade(pTHX_ register SV* sv, bool fail_ok)
3415 if (SvPOK(sv) && SvUTF8(sv)) {
3420 if (SvREADONLY(sv) && SvFAKE(sv))
3421 sv_force_normal(sv);
3422 s = (U8 *) SvPV(sv, len);
3423 if (!utf8_to_bytes(s, &len)) {
3428 Perl_croak(aTHX_ "Wide character in %s",
3431 Perl_croak(aTHX_ "Wide character");
3442 =for apidoc sv_utf8_encode
3444 Convert the PV of an SV to UTF8-encoded, but then turn off the C<SvUTF8>
3445 flag so that it looks like octets again. Used as a building block
3446 for encode_utf8 in Encode.xs
3452 Perl_sv_utf8_encode(pTHX_ register SV *sv)
3454 (void) sv_utf8_upgrade(sv);
3459 =for apidoc sv_utf8_decode
3461 Convert the octets in the PV from UTF-8 to chars. Scan for validity and then
3462 turn off SvUTF8 if needed so that we see characters. Used as a building block
3463 for decode_utf8 in Encode.xs
3469 Perl_sv_utf8_decode(pTHX_ register SV *sv)
3475 /* The octets may have got themselves encoded - get them back as
3478 if (!sv_utf8_downgrade(sv, TRUE))
3481 /* it is actually just a matter of turning the utf8 flag on, but
3482 * we want to make sure everything inside is valid utf8 first.
3484 c = (U8 *) SvPVX(sv);
3485 if (!is_utf8_string(c, SvCUR(sv)+1))
3487 e = (U8 *) SvEND(sv);
3490 if (!UTF8_IS_INVARIANT(ch)) {
3500 =for apidoc sv_setsv
3502 Copies the contents of the source SV C<ssv> into the destination SV
3503 C<dsv>. The source SV may be destroyed if it is mortal, so don't use this
3504 function if the source SV needs to be reused. Does not handle 'set' magic.
3505 Loosely speaking, it performs a copy-by-value, obliterating any previous
3506 content of the destination.
3508 You probably want to use one of the assortment of wrappers, such as
3509 C<SvSetSV>, C<SvSetSV_nosteal>, C<SvSetMagicSV> and
3510 C<SvSetMagicSV_nosteal>.
3516 /* sv_setsv() is aliased to Perl_sv_setsv_macro; this function provided
3517 for binary compatibility only
3520 Perl_sv_setsv(pTHX_ SV *dstr, register SV *sstr)
3522 sv_setsv_flags(dstr, sstr, SV_GMAGIC);
3526 =for apidoc sv_setsv_flags
3528 Copies the contents of the source SV C<ssv> into the destination SV
3529 C<dsv>. The source SV may be destroyed if it is mortal, so don't use this
3530 function if the source SV needs to be reused. Does not handle 'set' magic.
3531 Loosely speaking, it performs a copy-by-value, obliterating any previous
3532 content of the destination.
3533 If the C<flags> parameter has the C<SV_GMAGIC> bit set, will C<mg_get> on
3534 C<ssv> if appropriate, else not. C<sv_setsv> and C<sv_setsv_nomg> are
3535 implemented in terms of this function.
3537 You probably want to use one of the assortment of wrappers, such as
3538 C<SvSetSV>, C<SvSetSV_nosteal>, C<SvSetMagicSV> and
3539 C<SvSetMagicSV_nosteal>.
3541 This is the primary function for copying scalars, and most other
3542 copy-ish functions and macros use this underneath.
3548 Perl_sv_setsv_flags(pTHX_ SV *dstr, register SV *sstr, I32 flags)
3550 register U32 sflags;
3556 SV_CHECK_THINKFIRST(dstr);
3558 sstr = &PL_sv_undef;
3559 stype = SvTYPE(sstr);
3560 dtype = SvTYPE(dstr);
3564 /* There's a lot of redundancy below but we're going for speed here */
3569 if (dtype != SVt_PVGV) {
3570 (void)SvOK_off(dstr);
3578 sv_upgrade(dstr, SVt_IV);
3581 sv_upgrade(dstr, SVt_PVNV);
3585 sv_upgrade(dstr, SVt_PVIV);
3588 (void)SvIOK_only(dstr);
3589 SvIVX(dstr) = SvIVX(sstr);
3592 if (SvTAINTED(sstr))
3603 sv_upgrade(dstr, SVt_NV);
3608 sv_upgrade(dstr, SVt_PVNV);
3611 SvNVX(dstr) = SvNVX(sstr);
3612 (void)SvNOK_only(dstr);
3613 if (SvTAINTED(sstr))
3621 sv_upgrade(dstr, SVt_RV);
3622 else if (dtype == SVt_PVGV &&
3623 SvTYPE(SvRV(sstr)) == SVt_PVGV) {
3626 if (GvIMPORTED(dstr) != GVf_IMPORTED
3627 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3629 GvIMPORTED_on(dstr);
3640 sv_upgrade(dstr, SVt_PV);
3643 if (dtype < SVt_PVIV)
3644 sv_upgrade(dstr, SVt_PVIV);
3647 if (dtype < SVt_PVNV)
3648 sv_upgrade(dstr, SVt_PVNV);
3655 Perl_croak(aTHX_ "Bizarre copy of %s in %s", sv_reftype(sstr, 0),
3658 Perl_croak(aTHX_ "Bizarre copy of %s", sv_reftype(sstr, 0));
3662 if (dtype <= SVt_PVGV) {
3664 if (dtype != SVt_PVGV) {
3665 char *name = GvNAME(sstr);
3666 STRLEN len = GvNAMELEN(sstr);
3667 sv_upgrade(dstr, SVt_PVGV);
3668 sv_magic(dstr, dstr, PERL_MAGIC_glob, Nullch, 0);
3669 GvSTASH(dstr) = (HV*)SvREFCNT_inc(GvSTASH(sstr));
3670 GvNAME(dstr) = savepvn(name, len);
3671 GvNAMELEN(dstr) = len;
3672 SvFAKE_on(dstr); /* can coerce to non-glob */
3674 /* ahem, death to those who redefine active sort subs */
3675 else if (PL_curstackinfo->si_type == PERLSI_SORT
3676 && GvCV(dstr) && PL_sortcop == CvSTART(GvCV(dstr)))
3677 Perl_croak(aTHX_ "Can't redefine active sort subroutine %s",
3680 #ifdef GV_UNIQUE_CHECK
3681 if (GvUNIQUE((GV*)dstr)) {
3682 Perl_croak(aTHX_ PL_no_modify);
3686 (void)SvOK_off(dstr);
3687 GvINTRO_off(dstr); /* one-shot flag */
3689 GvGP(dstr) = gp_ref(GvGP(sstr));
3690 if (SvTAINTED(sstr))
3692 if (GvIMPORTED(dstr) != GVf_IMPORTED
3693 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3695 GvIMPORTED_on(dstr);
3703 if (SvGMAGICAL(sstr) && (flags & SV_GMAGIC)) {
3705 if (SvTYPE(sstr) != stype) {
3706 stype = SvTYPE(sstr);
3707 if (stype == SVt_PVGV && dtype <= SVt_PVGV)
3711 if (stype == SVt_PVLV)
3712 (void)SvUPGRADE(dstr, SVt_PVNV);
3714 (void)SvUPGRADE(dstr, stype);
3717 sflags = SvFLAGS(sstr);
3719 if (sflags & SVf_ROK) {
3720 if (dtype >= SVt_PV) {
3721 if (dtype == SVt_PVGV) {
3722 SV *sref = SvREFCNT_inc(SvRV(sstr));
3724 int intro = GvINTRO(dstr);
3726 #ifdef GV_UNIQUE_CHECK
3727 if (GvUNIQUE((GV*)dstr)) {
3728 Perl_croak(aTHX_ PL_no_modify);
3733 GvINTRO_off(dstr); /* one-shot flag */
3734 GvLINE(dstr) = CopLINE(PL_curcop);
3735 GvEGV(dstr) = (GV*)dstr;
3738 switch (SvTYPE(sref)) {
3741 SAVESPTR(GvAV(dstr));
3743 dref = (SV*)GvAV(dstr);
3744 GvAV(dstr) = (AV*)sref;
3745 if (!GvIMPORTED_AV(dstr)
3746 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3748 GvIMPORTED_AV_on(dstr);
3753 SAVESPTR(GvHV(dstr));
3755 dref = (SV*)GvHV(dstr);
3756 GvHV(dstr) = (HV*)sref;
3757 if (!GvIMPORTED_HV(dstr)
3758 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3760 GvIMPORTED_HV_on(dstr);
3765 if (GvCVGEN(dstr) && GvCV(dstr) != (CV*)sref) {
3766 SvREFCNT_dec(GvCV(dstr));
3767 GvCV(dstr) = Nullcv;
3768 GvCVGEN(dstr) = 0; /* Switch off cacheness. */
3769 PL_sub_generation++;
3771 SAVESPTR(GvCV(dstr));
3774 dref = (SV*)GvCV(dstr);
3775 if (GvCV(dstr) != (CV*)sref) {
3776 CV* cv = GvCV(dstr);
3778 if (!GvCVGEN((GV*)dstr) &&
3779 (CvROOT(cv) || CvXSUB(cv)))
3781 /* ahem, death to those who redefine
3782 * active sort subs */
3783 if (PL_curstackinfo->si_type == PERLSI_SORT &&
3784 PL_sortcop == CvSTART(cv))
3786 "Can't redefine active sort subroutine %s",
3787 GvENAME((GV*)dstr));
3788 /* Redefining a sub - warning is mandatory if
3789 it was a const and its value changed. */
3790 if (ckWARN(WARN_REDEFINE)
3792 && (!CvCONST((CV*)sref)
3793 || sv_cmp(cv_const_sv(cv),
3794 cv_const_sv((CV*)sref)))))
3796 Perl_warner(aTHX_ packWARN(WARN_REDEFINE),
3798 ? "Constant subroutine %s redefined"
3799 : "Subroutine %s redefined",
3800 GvENAME((GV*)dstr));
3804 cv_ckproto(cv, (GV*)dstr,
3805 SvPOK(sref) ? SvPVX(sref) : Nullch);
3807 GvCV(dstr) = (CV*)sref;
3808 GvCVGEN(dstr) = 0; /* Switch off cacheness. */
3809 GvASSUMECV_on(dstr);
3810 PL_sub_generation++;
3812 if (!GvIMPORTED_CV(dstr)
3813 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3815 GvIMPORTED_CV_on(dstr);
3820 SAVESPTR(GvIOp(dstr));
3822 dref = (SV*)GvIOp(dstr);
3823 GvIOp(dstr) = (IO*)sref;
3827 SAVESPTR(GvFORM(dstr));
3829 dref = (SV*)GvFORM(dstr);
3830 GvFORM(dstr) = (CV*)sref;
3834 SAVESPTR(GvSV(dstr));
3836 dref = (SV*)GvSV(dstr);
3838 if (!GvIMPORTED_SV(dstr)
3839 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3841 GvIMPORTED_SV_on(dstr);
3849 if (SvTAINTED(sstr))
3854 (void)SvOOK_off(dstr); /* backoff */
3856 Safefree(SvPVX(dstr));
3857 SvLEN(dstr)=SvCUR(dstr)=0;
3860 (void)SvOK_off(dstr);
3861 SvRV(dstr) = SvREFCNT_inc(SvRV(sstr));
3863 if (sflags & SVp_NOK) {
3865 /* Only set the public OK flag if the source has public OK. */
3866 if (sflags & SVf_NOK)
3867 SvFLAGS(dstr) |= SVf_NOK;
3868 SvNVX(dstr) = SvNVX(sstr);
3870 if (sflags & SVp_IOK) {
3871 (void)SvIOKp_on(dstr);
3872 if (sflags & SVf_IOK)
3873 SvFLAGS(dstr) |= SVf_IOK;
3874 if (sflags & SVf_IVisUV)
3876 SvIVX(dstr) = SvIVX(sstr);
3878 if (SvAMAGIC(sstr)) {
3882 else if (sflags & SVp_POK) {
3885 * Check to see if we can just swipe the string. If so, it's a
3886 * possible small lose on short strings, but a big win on long ones.
3887 * It might even be a win on short strings if SvPVX(dstr)
3888 * has to be allocated and SvPVX(sstr) has to be freed.
3891 if (SvTEMP(sstr) && /* slated for free anyway? */
3892 SvREFCNT(sstr) == 1 && /* and no other references to it? */
3893 !(sflags & SVf_OOK) && /* and not involved in OOK hack? */
3894 SvLEN(sstr) && /* and really is a string */
3895 /* and won't be needed again, potentially */
3896 !(PL_op && PL_op->op_type == OP_AASSIGN))
3898 if (SvPVX(dstr)) { /* we know that dtype >= SVt_PV */
3900 SvFLAGS(dstr) &= ~SVf_OOK;
3901 Safefree(SvPVX(dstr) - SvIVX(dstr));
3903 else if (SvLEN(dstr))
3904 Safefree(SvPVX(dstr));
3906 (void)SvPOK_only(dstr);
3907 SvPV_set(dstr, SvPVX(sstr));
3908 SvLEN_set(dstr, SvLEN(sstr));
3909 SvCUR_set(dstr, SvCUR(sstr));
3912 (void)SvOK_off(sstr); /* NOTE: nukes most SvFLAGS on sstr */
3913 SvPV_set(sstr, Nullch);
3918 else { /* have to copy actual string */
3919 STRLEN len = SvCUR(sstr);
3921 SvGROW(dstr, len + 1); /* inlined from sv_setpvn */
3922 Move(SvPVX(sstr),SvPVX(dstr),len,char);
3923 SvCUR_set(dstr, len);
3924 *SvEND(dstr) = '\0';
3925 (void)SvPOK_only(dstr);
3927 if (sflags & SVf_UTF8)
3930 if (sflags & SVp_NOK) {
3932 if (sflags & SVf_NOK)
3933 SvFLAGS(dstr) |= SVf_NOK;
3934 SvNVX(dstr) = SvNVX(sstr);
3936 if (sflags & SVp_IOK) {
3937 (void)SvIOKp_on(dstr);
3938 if (sflags & SVf_IOK)
3939 SvFLAGS(dstr) |= SVf_IOK;
3940 if (sflags & SVf_IVisUV)
3942 SvIVX(dstr) = SvIVX(sstr);
3945 else if (sflags & SVp_IOK) {
3946 if (sflags & SVf_IOK)
3947 (void)SvIOK_only(dstr);
3949 (void)SvOK_off(dstr);
3950 (void)SvIOKp_on(dstr);
3952 /* XXXX Do we want to set IsUV for IV(ROK)? Be extra safe... */
3953 if (sflags & SVf_IVisUV)
3955 SvIVX(dstr) = SvIVX(sstr);
3956 if (sflags & SVp_NOK) {
3957 if (sflags & SVf_NOK)
3958 (void)SvNOK_on(dstr);
3960 (void)SvNOKp_on(dstr);
3961 SvNVX(dstr) = SvNVX(sstr);
3964 else if (sflags & SVp_NOK) {
3965 if (sflags & SVf_NOK)
3966 (void)SvNOK_only(dstr);
3968 (void)SvOK_off(dstr);
3971 SvNVX(dstr) = SvNVX(sstr);
3974 if (dtype == SVt_PVGV) {
3975 if (ckWARN(WARN_MISC))
3976 Perl_warner(aTHX_ packWARN(WARN_MISC), "Undefined value assigned to typeglob");
3979 (void)SvOK_off(dstr);
3981 if (SvTAINTED(sstr))
3986 =for apidoc sv_setsv_mg
3988 Like C<sv_setsv>, but also handles 'set' magic.
3994 Perl_sv_setsv_mg(pTHX_ SV *dstr, register SV *sstr)
3996 sv_setsv(dstr,sstr);
4001 =for apidoc sv_setpvn
4003 Copies a string into an SV. The C<len> parameter indicates the number of
4004 bytes to be copied. Does not handle 'set' magic. See C<sv_setpvn_mg>.
4010 Perl_sv_setpvn(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
4012 register char *dptr;
4014 SV_CHECK_THINKFIRST(sv);
4020 /* len is STRLEN which is unsigned, need to copy to signed */
4023 Perl_croak(aTHX_ "panic: sv_setpvn called with negative strlen");
4025 (void)SvUPGRADE(sv, SVt_PV);
4027 SvGROW(sv, len + 1);
4029 Move(ptr,dptr,len,char);
4032 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4037 =for apidoc sv_setpvn_mg
4039 Like C<sv_setpvn>, but also handles 'set' magic.
4045 Perl_sv_setpvn_mg(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
4047 sv_setpvn(sv,ptr,len);
4052 =for apidoc sv_setpv
4054 Copies a string into an SV. The string must be null-terminated. Does not
4055 handle 'set' magic. See C<sv_setpv_mg>.
4061 Perl_sv_setpv(pTHX_ register SV *sv, register const char *ptr)
4063 register STRLEN len;
4065 SV_CHECK_THINKFIRST(sv);
4071 (void)SvUPGRADE(sv, SVt_PV);
4073 SvGROW(sv, len + 1);
4074 Move(ptr,SvPVX(sv),len+1,char);
4076 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4081 =for apidoc sv_setpv_mg
4083 Like C<sv_setpv>, but also handles 'set' magic.
4089 Perl_sv_setpv_mg(pTHX_ register SV *sv, register const char *ptr)
4096 =for apidoc sv_usepvn
4098 Tells an SV to use C<ptr> to find its string value. Normally the string is
4099 stored inside the SV but sv_usepvn allows the SV to use an outside string.
4100 The C<ptr> should point to memory that was allocated by C<malloc>. The
4101 string length, C<len>, must be supplied. This function will realloc the
4102 memory pointed to by C<ptr>, so that pointer should not be freed or used by
4103 the programmer after giving it to sv_usepvn. Does not handle 'set' magic.
4104 See C<sv_usepvn_mg>.
4110 Perl_sv_usepvn(pTHX_ register SV *sv, register char *ptr, register STRLEN len)
4112 SV_CHECK_THINKFIRST(sv);
4113 (void)SvUPGRADE(sv, SVt_PV);
4118 (void)SvOOK_off(sv);
4119 if (SvPVX(sv) && SvLEN(sv))
4120 Safefree(SvPVX(sv));
4121 Renew(ptr, len+1, char);
4124 SvLEN_set(sv, len+1);
4126 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4131 =for apidoc sv_usepvn_mg
4133 Like C<sv_usepvn>, but also handles 'set' magic.
4139 Perl_sv_usepvn_mg(pTHX_ register SV *sv, register char *ptr, register STRLEN len)
4141 sv_usepvn(sv,ptr,len);
4146 =for apidoc sv_force_normal_flags
4148 Undo various types of fakery on an SV: if the PV is a shared string, make
4149 a private copy; if we're a ref, stop refing; if we're a glob, downgrade to
4150 an xpvmg. The C<flags> parameter gets passed to C<sv_unref_flags()>
4151 when unrefing. C<sv_force_normal> calls this function with flags set to 0.
4157 Perl_sv_force_normal_flags(pTHX_ register SV *sv, U32 flags)
4159 if (SvREADONLY(sv)) {
4161 char *pvx = SvPVX(sv);
4162 STRLEN len = SvCUR(sv);
4163 U32 hash = SvUVX(sv);
4164 SvGROW(sv, len + 1);
4165 Move(pvx,SvPVX(sv),len,char);
4169 unsharepvn(pvx, SvUTF8(sv) ? -(I32)len : len, hash);
4171 else if (PL_curcop != &PL_compiling)
4172 Perl_croak(aTHX_ PL_no_modify);
4175 sv_unref_flags(sv, flags);
4176 else if (SvFAKE(sv) && SvTYPE(sv) == SVt_PVGV)
4181 =for apidoc sv_force_normal
4183 Undo various types of fakery on an SV: if the PV is a shared string, make
4184 a private copy; if we're a ref, stop refing; if we're a glob, downgrade to
4185 an xpvmg. See also C<sv_force_normal_flags>.
4191 Perl_sv_force_normal(pTHX_ register SV *sv)
4193 sv_force_normal_flags(sv, 0);
4199 Efficient removal of characters from the beginning of the string buffer.
4200 SvPOK(sv) must be true and the C<ptr> must be a pointer to somewhere inside
4201 the string buffer. The C<ptr> becomes the first character of the adjusted
4202 string. Uses the "OOK hack".
4208 Perl_sv_chop(pTHX_ register SV *sv, register char *ptr)
4210 register STRLEN delta;
4212 if (!ptr || !SvPOKp(sv))
4214 SV_CHECK_THINKFIRST(sv);
4215 if (SvTYPE(sv) < SVt_PVIV)
4216 sv_upgrade(sv,SVt_PVIV);
4219 if (!SvLEN(sv)) { /* make copy of shared string */
4220 char *pvx = SvPVX(sv);
4221 STRLEN len = SvCUR(sv);
4222 SvGROW(sv, len + 1);
4223 Move(pvx,SvPVX(sv),len,char);
4227 SvFLAGS(sv) |= SVf_OOK;
4229 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVp_IOK|SVp_NOK|SVf_IVisUV);
4230 delta = ptr - SvPVX(sv);
4238 =for apidoc sv_catpvn
4240 Concatenates the string onto the end of the string which is in the SV. The
4241 C<len> indicates number of bytes to copy. If the SV has the UTF8
4242 status set, then the bytes appended should be valid UTF8.
4243 Handles 'get' magic, but not 'set' magic. See C<sv_catpvn_mg>.
4248 /* sv_catpvn() is aliased to Perl_sv_catpvn_macro; this function provided
4249 for binary compatibility only
4252 Perl_sv_catpvn(pTHX_ SV *dsv, const char* sstr, STRLEN slen)
4254 sv_catpvn_flags(dsv, sstr, slen, SV_GMAGIC);
4258 =for apidoc sv_catpvn_flags
4260 Concatenates the string onto the end of the string which is in the SV. The
4261 C<len> indicates number of bytes to copy. If the SV has the UTF8
4262 status set, then the bytes appended should be valid UTF8.
4263 If C<flags> has C<SV_GMAGIC> bit set, will C<mg_get> on C<dsv> if
4264 appropriate, else not. C<sv_catpvn> and C<sv_catpvn_nomg> are implemented
4265 in terms of this function.
4271 Perl_sv_catpvn_flags(pTHX_ register SV *dsv, register const char *sstr, register STRLEN slen, I32 flags)
4276 dstr = SvPV_force_flags(dsv, dlen, flags);
4277 SvGROW(dsv, dlen + slen + 1);
4280 Move(sstr, SvPVX(dsv) + dlen, slen, char);
4283 (void)SvPOK_only_UTF8(dsv); /* validate pointer */
4288 =for apidoc sv_catpvn_mg
4290 Like C<sv_catpvn>, but also handles 'set' magic.
4296 Perl_sv_catpvn_mg(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
4298 sv_catpvn(sv,ptr,len);
4303 =for apidoc sv_catsv
4305 Concatenates the string from SV C<ssv> onto the end of the string in
4306 SV C<dsv>. Modifies C<dsv> but not C<ssv>. Handles 'get' magic, but
4307 not 'set' magic. See C<sv_catsv_mg>.
4311 /* sv_catsv() is aliased to Perl_sv_catsv_macro; this function provided
4312 for binary compatibility only
4315 Perl_sv_catsv(pTHX_ SV *dstr, register SV *sstr)
4317 sv_catsv_flags(dstr, sstr, SV_GMAGIC);
4321 =for apidoc sv_catsv_flags
4323 Concatenates the string from SV C<ssv> onto the end of the string in
4324 SV C<dsv>. Modifies C<dsv> but not C<ssv>. If C<flags> has C<SV_GMAGIC>
4325 bit set, will C<mg_get> on the SVs if appropriate, else not. C<sv_catsv>
4326 and C<sv_catsv_nomg> are implemented in terms of this function.
4331 Perl_sv_catsv_flags(pTHX_ SV *dsv, register SV *ssv, I32 flags)
4337 if ((spv = SvPV(ssv, slen))) {
4338 /* sutf8 and dutf8 were type bool, but under USE_ITHREADS,
4339 gcc version 2.95.2 20000220 (Debian GNU/Linux) for
4340 Linux xxx 2.2.17 on sparc64 with gcc -O2, we erroneously
4341 get dutf8 = 0x20000000, (i.e. SVf_UTF8) even though
4342 dsv->sv_flags doesn't have that bit set.
4343 Andy Dougherty 12 Oct 2001
4345 I32 sutf8 = DO_UTF8(ssv);
4348 if (SvGMAGICAL(dsv) && (flags & SV_GMAGIC))
4350 dutf8 = DO_UTF8(dsv);
4352 if (dutf8 != sutf8) {
4354 /* Not modifying source SV, so taking a temporary copy. */
4355 SV* csv = sv_2mortal(newSVpvn(spv, slen));
4357 sv_utf8_upgrade(csv);
4358 spv = SvPV(csv, slen);
4361 sv_utf8_upgrade_nomg(dsv);
4363 sv_catpvn_nomg(dsv, spv, slen);
4368 =for apidoc sv_catsv_mg
4370 Like C<sv_catsv>, but also handles 'set' magic.
4376 Perl_sv_catsv_mg(pTHX_ SV *dsv, register SV *ssv)
4383 =for apidoc sv_catpv
4385 Concatenates the string onto the end of the string which is in the SV.
4386 If the SV has the UTF8 status set, then the bytes appended should be
4387 valid UTF8. Handles 'get' magic, but not 'set' magic. See C<sv_catpv_mg>.
4392 Perl_sv_catpv(pTHX_ register SV *sv, register const char *ptr)
4394 register STRLEN len;
4400 junk = SvPV_force(sv, tlen);
4402 SvGROW(sv, tlen + len + 1);
4405 Move(ptr,SvPVX(sv)+tlen,len+1,char);
4407 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4412 =for apidoc sv_catpv_mg
4414 Like C<sv_catpv>, but also handles 'set' magic.
4420 Perl_sv_catpv_mg(pTHX_ register SV *sv, register const char *ptr)
4429 Create a new null SV, or if len > 0, create a new empty SVt_PV type SV
4430 with an initial PV allocation of len+1. Normally accessed via the C<NEWSV>
4437 Perl_newSV(pTHX_ STRLEN len)
4443 sv_upgrade(sv, SVt_PV);
4444 SvGROW(sv, len + 1);
4449 =for apidoc sv_magicext
4451 Adds magic to an SV, upgrading it if necessary. Applies the
4452 supplied vtable and returns pointer to the magic added.
4454 Note that sv_magicext will allow things that sv_magic will not.
4455 In particular you can add magic to SvREADONLY SVs and and more than
4456 one instance of the same 'how'
4458 I C<namelen> is greater then zero then a savepvn() I<copy> of C<name> is stored,
4459 if C<namelen> is zero then C<name> is stored as-is and - as another special
4460 case - if C<(name && namelen == HEf_SVKEY)> then C<name> is assumed to contain
4461 an C<SV*> and has its REFCNT incremented
4463 (This is now used as a subroutine by sv_magic.)
4468 Perl_sv_magicext(pTHX_ SV* sv, SV* obj, int how, MGVTBL *vtable,
4469 const char* name, I32 namlen)
4473 if (SvTYPE(sv) < SVt_PVMG) {
4474 (void)SvUPGRADE(sv, SVt_PVMG);
4476 Newz(702,mg, 1, MAGIC);
4477 mg->mg_moremagic = SvMAGIC(sv);
4480 /* Some magic sontains a reference loop, where the sv and object refer to
4481 each other. To prevent a reference loop that would prevent such
4482 objects being freed, we look for such loops and if we find one we
4483 avoid incrementing the object refcount. */
4484 if (!obj || obj == sv ||
4485 how == PERL_MAGIC_arylen ||
4486 how == PERL_MAGIC_qr ||
4487 (SvTYPE(obj) == SVt_PVGV &&
4488 (GvSV(obj) == sv || GvHV(obj) == (HV*)sv || GvAV(obj) == (AV*)sv ||
4489 GvCV(obj) == (CV*)sv || GvIOp(obj) == (IO*)sv ||
4490 GvFORM(obj) == (CV*)sv)))
4495 mg->mg_obj = SvREFCNT_inc(obj);
4496 mg->mg_flags |= MGf_REFCOUNTED;
4499 mg->mg_len = namlen;
4502 mg->mg_ptr = savepvn(name, namlen);
4503 else if (namlen == HEf_SVKEY)
4504 mg->mg_ptr = (char*)SvREFCNT_inc((SV*)name);
4506 mg->mg_ptr = (char *) name;
4508 mg->mg_virtual = vtable;
4512 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
4517 =for apidoc sv_magic
4519 Adds magic to an SV. First upgrades C<sv> to type C<SVt_PVMG> if necessary,
4520 then adds a new magic item of type C<how> to the head of the magic list.
4526 Perl_sv_magic(pTHX_ register SV *sv, SV *obj, int how, const char *name, I32 namlen)
4531 if (SvREADONLY(sv)) {
4532 if (PL_curcop != &PL_compiling
4533 && how != PERL_MAGIC_regex_global
4534 && how != PERL_MAGIC_bm
4535 && how != PERL_MAGIC_fm
4536 && how != PERL_MAGIC_sv
4539 Perl_croak(aTHX_ PL_no_modify);
4542 if (SvMAGICAL(sv) || (how == PERL_MAGIC_taint && SvTYPE(sv) >= SVt_PVMG)) {
4543 if (SvMAGIC(sv) && (mg = mg_find(sv, how))) {
4544 /* sv_magic() refuses to add a magic of the same 'how' as an
4547 if (how == PERL_MAGIC_taint)
4555 vtable = &PL_vtbl_sv;
4557 case PERL_MAGIC_overload:
4558 vtable = &PL_vtbl_amagic;
4560 case PERL_MAGIC_overload_elem:
4561 vtable = &PL_vtbl_amagicelem;
4563 case PERL_MAGIC_overload_table:
4564 vtable = &PL_vtbl_ovrld;
4567 vtable = &PL_vtbl_bm;
4569 case PERL_MAGIC_regdata:
4570 vtable = &PL_vtbl_regdata;
4572 case PERL_MAGIC_regdatum:
4573 vtable = &PL_vtbl_regdatum;
4575 case PERL_MAGIC_env:
4576 vtable = &PL_vtbl_env;
4579 vtable = &PL_vtbl_fm;
4581 case PERL_MAGIC_envelem:
4582 vtable = &PL_vtbl_envelem;
4584 case PERL_MAGIC_regex_global:
4585 vtable = &PL_vtbl_mglob;
4587 case PERL_MAGIC_isa:
4588 vtable = &PL_vtbl_isa;
4590 case PERL_MAGIC_isaelem:
4591 vtable = &PL_vtbl_isaelem;
4593 case PERL_MAGIC_nkeys:
4594 vtable = &PL_vtbl_nkeys;
4596 case PERL_MAGIC_dbfile:
4599 case PERL_MAGIC_dbline:
4600 vtable = &PL_vtbl_dbline;
4602 #ifdef USE_5005THREADS
4603 case PERL_MAGIC_mutex:
4604 vtable = &PL_vtbl_mutex;
4606 #endif /* USE_5005THREADS */
4607 #ifdef USE_LOCALE_COLLATE
4608 case PERL_MAGIC_collxfrm:
4609 vtable = &PL_vtbl_collxfrm;
4611 #endif /* USE_LOCALE_COLLATE */
4612 case PERL_MAGIC_tied:
4613 vtable = &PL_vtbl_pack;
4615 case PERL_MAGIC_tiedelem:
4616 case PERL_MAGIC_tiedscalar:
4617 vtable = &PL_vtbl_packelem;
4620 vtable = &PL_vtbl_regexp;
4622 case PERL_MAGIC_sig:
4623 vtable = &PL_vtbl_sig;
4625 case PERL_MAGIC_sigelem:
4626 vtable = &PL_vtbl_sigelem;
4628 case PERL_MAGIC_taint:
4629 vtable = &PL_vtbl_taint;
4631 case PERL_MAGIC_uvar:
4632 vtable = &PL_vtbl_uvar;
4634 case PERL_MAGIC_vec:
4635 vtable = &PL_vtbl_vec;
4637 case PERL_MAGIC_substr:
4638 vtable = &PL_vtbl_substr;
4640 case PERL_MAGIC_defelem:
4641 vtable = &PL_vtbl_defelem;
4643 case PERL_MAGIC_glob:
4644 vtable = &PL_vtbl_glob;
4646 case PERL_MAGIC_arylen:
4647 vtable = &PL_vtbl_arylen;
4649 case PERL_MAGIC_pos:
4650 vtable = &PL_vtbl_pos;
4652 case PERL_MAGIC_backref:
4653 vtable = &PL_vtbl_backref;
4655 case PERL_MAGIC_ext:
4656 /* Reserved for use by extensions not perl internals. */
4657 /* Useful for attaching extension internal data to perl vars. */
4658 /* Note that multiple extensions may clash if magical scalars */
4659 /* etc holding private data from one are passed to another. */
4662 Perl_croak(aTHX_ "Don't know how to handle magic of type \\%o", how);
4665 /* Rest of work is done else where */
4666 mg = sv_magicext(sv,obj,how,vtable,name,namlen);
4669 case PERL_MAGIC_taint:
4672 case PERL_MAGIC_ext:
4673 case PERL_MAGIC_dbfile:
4680 =for apidoc sv_unmagic
4682 Removes all magic of type C<type> from an SV.
4688 Perl_sv_unmagic(pTHX_ SV *sv, int type)
4692 if (SvTYPE(sv) < SVt_PVMG || !SvMAGIC(sv))
4695 for (mg = *mgp; mg; mg = *mgp) {
4696 if (mg->mg_type == type) {
4697 MGVTBL* vtbl = mg->mg_virtual;
4698 *mgp = mg->mg_moremagic;
4699 if (vtbl && vtbl->svt_free)
4700 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
4701 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
4703 Safefree(mg->mg_ptr);
4704 else if (mg->mg_len == HEf_SVKEY)
4705 SvREFCNT_dec((SV*)mg->mg_ptr);
4707 if (mg->mg_flags & MGf_REFCOUNTED)
4708 SvREFCNT_dec(mg->mg_obj);
4712 mgp = &mg->mg_moremagic;
4716 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_NOK|SVp_POK)) >> PRIVSHIFT;
4723 =for apidoc sv_rvweaken
4725 Weaken a reference: set the C<SvWEAKREF> flag on this RV; give the
4726 referred-to SV C<PERL_MAGIC_backref> magic if it hasn't already; and
4727 push a back-reference to this RV onto the array of backreferences
4728 associated with that magic.
4734 Perl_sv_rvweaken(pTHX_ SV *sv)
4737 if (!SvOK(sv)) /* let undefs pass */
4740 Perl_croak(aTHX_ "Can't weaken a nonreference");
4741 else if (SvWEAKREF(sv)) {
4742 if (ckWARN(WARN_MISC))
4743 Perl_warner(aTHX_ packWARN(WARN_MISC), "Reference is already weak");
4747 sv_add_backref(tsv, sv);
4753 /* Give tsv backref magic if it hasn't already got it, then push a
4754 * back-reference to sv onto the array associated with the backref magic.
4758 S_sv_add_backref(pTHX_ SV *tsv, SV *sv)
4762 if (SvMAGICAL(tsv) && (mg = mg_find(tsv, PERL_MAGIC_backref)))
4763 av = (AV*)mg->mg_obj;
4766 sv_magic(tsv, (SV*)av, PERL_MAGIC_backref, NULL, 0);
4767 SvREFCNT_dec(av); /* for sv_magic */
4772 /* delete a back-reference to ourselves from the backref magic associated
4773 * with the SV we point to.
4777 S_sv_del_backref(pTHX_ SV *sv)
4784 if (!SvMAGICAL(tsv) || !(mg = mg_find(tsv, PERL_MAGIC_backref)))
4785 Perl_croak(aTHX_ "panic: del_backref");
4786 av = (AV *)mg->mg_obj;
4791 svp[i] = &PL_sv_undef; /* XXX */
4798 =for apidoc sv_insert
4800 Inserts a string at the specified offset/length within the SV. Similar to
4801 the Perl substr() function.
4807 Perl_sv_insert(pTHX_ SV *bigstr, STRLEN offset, STRLEN len, char *little, STRLEN littlelen)
4811 register char *midend;
4812 register char *bigend;
4818 Perl_croak(aTHX_ "Can't modify non-existent substring");
4819 SvPV_force(bigstr, curlen);
4820 (void)SvPOK_only_UTF8(bigstr);
4821 if (offset + len > curlen) {
4822 SvGROW(bigstr, offset+len+1);
4823 Zero(SvPVX(bigstr)+curlen, offset+len-curlen, char);
4824 SvCUR_set(bigstr, offset+len);
4828 i = littlelen - len;
4829 if (i > 0) { /* string might grow */
4830 big = SvGROW(bigstr, SvCUR(bigstr) + i + 1);
4831 mid = big + offset + len;
4832 midend = bigend = big + SvCUR(bigstr);
4835 while (midend > mid) /* shove everything down */
4836 *--bigend = *--midend;
4837 Move(little,big+offset,littlelen,char);
4843 Move(little,SvPVX(bigstr)+offset,len,char);
4848 big = SvPVX(bigstr);
4851 bigend = big + SvCUR(bigstr);
4853 if (midend > bigend)
4854 Perl_croak(aTHX_ "panic: sv_insert");
4856 if (mid - big > bigend - midend) { /* faster to shorten from end */
4858 Move(little, mid, littlelen,char);
4861 i = bigend - midend;
4863 Move(midend, mid, i,char);
4867 SvCUR_set(bigstr, mid - big);
4870 else if ((i = mid - big)) { /* faster from front */
4871 midend -= littlelen;
4873 sv_chop(bigstr,midend-i);
4878 Move(little, mid, littlelen,char);
4880 else if (littlelen) {
4881 midend -= littlelen;
4882 sv_chop(bigstr,midend);
4883 Move(little,midend,littlelen,char);
4886 sv_chop(bigstr,midend);
4892 =for apidoc sv_replace
4894 Make the first argument a copy of the second, then delete the original.
4895 The target SV physically takes over ownership of the body of the source SV
4896 and inherits its flags; however, the target keeps any magic it owns,
4897 and any magic in the source is discarded.
4898 Note that this is a rather specialist SV copying operation; most of the
4899 time you'll want to use C<sv_setsv> or one of its many macro front-ends.
4905 Perl_sv_replace(pTHX_ register SV *sv, register SV *nsv)
4907 U32 refcnt = SvREFCNT(sv);
4908 SV_CHECK_THINKFIRST(sv);
4909 if (SvREFCNT(nsv) != 1 && ckWARN_d(WARN_INTERNAL))
4910 Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Reference miscount in sv_replace()");
4911 if (SvMAGICAL(sv)) {
4915 sv_upgrade(nsv, SVt_PVMG);
4916 SvMAGIC(nsv) = SvMAGIC(sv);
4917 SvFLAGS(nsv) |= SvMAGICAL(sv);
4923 assert(!SvREFCNT(sv));
4924 StructCopy(nsv,sv,SV);
4925 SvREFCNT(sv) = refcnt;
4926 SvFLAGS(nsv) |= SVTYPEMASK; /* Mark as freed */
4931 =for apidoc sv_clear
4933 Clear an SV: call any destructors, free up any memory used by the body,
4934 and free the body itself. The SV's head is I<not> freed, although
4935 its type is set to all 1's so that it won't inadvertently be assumed
4936 to be live during global destruction etc.
4937 This function should only be called when REFCNT is zero. Most of the time
4938 you'll want to call C<sv_free()> (or its macro wrapper C<SvREFCNT_dec>)
4945 Perl_sv_clear(pTHX_ register SV *sv)
4949 assert(SvREFCNT(sv) == 0);
4952 if (PL_defstash) { /* Still have a symbol table? */
4957 Zero(&tmpref, 1, SV);
4958 sv_upgrade(&tmpref, SVt_RV);
4960 SvREADONLY_on(&tmpref); /* DESTROY() could be naughty */
4961 SvREFCNT(&tmpref) = 1;
4964 stash = SvSTASH(sv);
4965 destructor = StashHANDLER(stash,DESTROY);
4968 PUSHSTACKi(PERLSI_DESTROY);
4969 SvRV(&tmpref) = SvREFCNT_inc(sv);
4974 call_sv((SV*)destructor, G_DISCARD|G_EVAL|G_KEEPERR);
4980 } while (SvOBJECT(sv) && SvSTASH(sv) != stash);
4982 del_XRV(SvANY(&tmpref));
4985 if (PL_in_clean_objs)
4986 Perl_croak(aTHX_ "DESTROY created new reference to dead object '%s'",
4988 /* DESTROY gave object new lease on life */
4994 SvREFCNT_dec(SvSTASH(sv)); /* possibly of changed persuasion */
4995 SvOBJECT_off(sv); /* Curse the object. */
4996 if (SvTYPE(sv) != SVt_PVIO)
4997 --PL_sv_objcount; /* XXX Might want something more general */
5000 if (SvTYPE(sv) >= SVt_PVMG) {
5003 if (SvFLAGS(sv) & SVpad_TYPED)
5004 SvREFCNT_dec(SvSTASH(sv));
5007 switch (SvTYPE(sv)) {
5010 IoIFP(sv) != PerlIO_stdin() &&
5011 IoIFP(sv) != PerlIO_stdout() &&
5012 IoIFP(sv) != PerlIO_stderr())
5014 io_close((IO*)sv, FALSE);
5016 if (IoDIRP(sv) && !(IoFLAGS(sv) & IOf_FAKE_DIRP))
5017 PerlDir_close(IoDIRP(sv));
5018 IoDIRP(sv) = (DIR*)NULL;
5019 Safefree(IoTOP_NAME(sv));
5020 Safefree(IoFMT_NAME(sv));
5021 Safefree(IoBOTTOM_NAME(sv));
5036 SvREFCNT_dec(LvTARG(sv));
5040 Safefree(GvNAME(sv));
5041 /* cannot decrease stash refcount yet, as we might recursively delete
5042 ourselves when the refcnt drops to zero. Delay SvREFCNT_dec
5043 of stash until current sv is completely gone.
5044 -- JohnPC, 27 Mar 1998 */
5045 stash = GvSTASH(sv);
5051 (void)SvOOK_off(sv);
5059 SvREFCNT_dec(SvRV(sv));
5061 else if (SvPVX(sv) && SvLEN(sv))
5062 Safefree(SvPVX(sv));
5063 else if (SvPVX(sv) && SvREADONLY(sv) && SvFAKE(sv)) {
5064 unsharepvn(SvPVX(sv),
5065 SvUTF8(sv) ? -(I32)SvCUR(sv) : SvCUR(sv),
5078 switch (SvTYPE(sv)) {
5094 del_XPVIV(SvANY(sv));
5097 del_XPVNV(SvANY(sv));
5100 del_XPVMG(SvANY(sv));
5103 del_XPVLV(SvANY(sv));
5106 del_XPVAV(SvANY(sv));
5109 del_XPVHV(SvANY(sv));
5112 del_XPVCV(SvANY(sv));
5115 del_XPVGV(SvANY(sv));
5116 /* code duplication for increased performance. */
5117 SvFLAGS(sv) &= SVf_BREAK;
5118 SvFLAGS(sv) |= SVTYPEMASK;
5119 /* decrease refcount of the stash that owns this GV, if any */
5121 SvREFCNT_dec(stash);
5122 return; /* not break, SvFLAGS reset already happened */
5124 del_XPVBM(SvANY(sv));
5127 del_XPVFM(SvANY(sv));
5130 del_XPVIO(SvANY(sv));
5133 SvFLAGS(sv) &= SVf_BREAK;
5134 SvFLAGS(sv) |= SVTYPEMASK;
5138 =for apidoc sv_newref
5140 Increment an SV's reference count. Use the C<SvREFCNT_inc()> wrapper
5147 Perl_sv_newref(pTHX_ SV *sv)
5150 ATOMIC_INC(SvREFCNT(sv));
5157 Decrement an SV's reference count, and if it drops to zero, call
5158 C<sv_clear> to invoke destructors and free up any memory used by
5159 the body; finally, deallocate the SV's head itself.
5160 Normally called via a wrapper macro C<SvREFCNT_dec>.
5166 Perl_sv_free(pTHX_ SV *sv)
5168 int refcount_is_zero;
5172 if (SvREFCNT(sv) == 0) {
5173 if (SvFLAGS(sv) & SVf_BREAK)
5174 /* this SV's refcnt has been artificially decremented to
5175 * trigger cleanup */
5177 if (PL_in_clean_all) /* All is fair */
5179 if (SvREADONLY(sv) && SvIMMORTAL(sv)) {
5180 /* make sure SvREFCNT(sv)==0 happens very seldom */
5181 SvREFCNT(sv) = (~(U32)0)/2;
5184 if (ckWARN_d(WARN_INTERNAL))
5185 Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Attempt to free unreferenced scalar");
5188 ATOMIC_DEC_AND_TEST(refcount_is_zero, SvREFCNT(sv));
5189 if (!refcount_is_zero)
5193 if (ckWARN_d(WARN_DEBUGGING))
5194 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
5195 "Attempt to free temp prematurely: SV 0x%"UVxf,
5200 if (SvREADONLY(sv) && SvIMMORTAL(sv)) {
5201 /* make sure SvREFCNT(sv)==0 happens very seldom */
5202 SvREFCNT(sv) = (~(U32)0)/2;
5213 Returns the length of the string in the SV. Handles magic and type
5214 coercion. See also C<SvCUR>, which gives raw access to the xpv_cur slot.
5220 Perl_sv_len(pTHX_ register SV *sv)
5228 len = mg_length(sv);
5230 (void)SvPV(sv, len);
5235 =for apidoc sv_len_utf8
5237 Returns the number of characters in the string in an SV, counting wide
5238 UTF8 bytes as a single character. Handles magic and type coercion.
5244 Perl_sv_len_utf8(pTHX_ register SV *sv)
5250 return mg_length(sv);
5254 U8 *s = (U8*)SvPV(sv, len);
5256 return Perl_utf8_length(aTHX_ s, s + len);
5261 =for apidoc sv_pos_u2b
5263 Converts the value pointed to by offsetp from a count of UTF8 chars from
5264 the start of the string, to a count of the equivalent number of bytes; if
5265 lenp is non-zero, it does the same to lenp, but this time starting from
5266 the offset, rather than from the start of the string. Handles magic and
5273 Perl_sv_pos_u2b(pTHX_ register SV *sv, I32* offsetp, I32* lenp)
5278 I32 uoffset = *offsetp;
5284 start = s = (U8*)SvPV(sv, len);
5286 while (s < send && uoffset--)
5290 *offsetp = s - start;
5294 while (s < send && ulen--)
5304 =for apidoc sv_pos_b2u
5306 Converts the value pointed to by offsetp from a count of bytes from the
5307 start of the string, to a count of the equivalent number of UTF8 chars.
5308 Handles magic and type coercion.
5314 Perl_sv_pos_b2u(pTHX_ register SV *sv, I32* offsetp)
5323 s = (U8*)SvPV(sv, len);
5325 Perl_croak(aTHX_ "panic: sv_pos_b2u: bad byte offset");
5326 send = s + *offsetp;
5330 /* Call utf8n_to_uvchr() to validate the sequence */
5331 utf8n_to_uvchr(s, UTF8SKIP(s), &n, 0);
5346 Returns a boolean indicating whether the strings in the two SVs are
5347 identical. Is UTF-8 and 'use bytes' aware, handles get magic, and will
5348 coerce its args to strings if necessary.
5354 Perl_sv_eq(pTHX_ register SV *sv1, register SV *sv2)
5362 SV* svrecode = Nullsv;
5369 pv1 = SvPV(sv1, cur1);
5376 pv2 = SvPV(sv2, cur2);
5378 if (cur1 && cur2 && SvUTF8(sv1) != SvUTF8(sv2) && !IN_BYTES) {
5379 /* Differing utf8ness.
5380 * Do not UTF8size the comparands as a side-effect. */
5383 svrecode = newSVpvn(pv2, cur2);
5384 sv_recode_to_utf8(svrecode, PL_encoding);
5385 pv2 = SvPV(svrecode, cur2);
5388 svrecode = newSVpvn(pv1, cur1);
5389 sv_recode_to_utf8(svrecode, PL_encoding);
5390 pv1 = SvPV(svrecode, cur1);
5392 /* Now both are in UTF-8. */
5397 bool is_utf8 = TRUE;
5400 /* sv1 is the UTF-8 one,
5401 * if is equal it must be downgrade-able */
5402 char *pv = (char*)bytes_from_utf8((U8*)pv1,
5408 /* sv2 is the UTF-8 one,
5409 * if is equal it must be downgrade-able */
5410 char *pv = (char *)bytes_from_utf8((U8*)pv2,
5416 /* Downgrade not possible - cannot be eq */
5423 eq = memEQ(pv1, pv2, cur1);
5426 SvREFCNT_dec(svrecode);
5437 Compares the strings in two SVs. Returns -1, 0, or 1 indicating whether the
5438 string in C<sv1> is less than, equal to, or greater than the string in
5439 C<sv2>. Is UTF-8 and 'use bytes' aware, handles get magic, and will
5440 coerce its args to strings if necessary. See also C<sv_cmp_locale>.
5446 Perl_sv_cmp(pTHX_ register SV *sv1, register SV *sv2)
5449 char *pv1, *pv2, *tpv = Nullch;
5451 SV *svrecode = Nullsv;
5458 pv1 = SvPV(sv1, cur1);
5465 pv2 = SvPV(sv2, cur2);
5467 if (cur1 && cur2 && SvUTF8(sv1) != SvUTF8(sv2) && !IN_BYTES) {
5468 /* Differing utf8ness.
5469 * Do not UTF8size the comparands as a side-effect. */
5472 svrecode = newSVpvn(pv2, cur2);
5473 sv_recode_to_utf8(svrecode, PL_encoding);
5474 pv2 = SvPV(svrecode, cur2);
5477 pv2 = tpv = (char*)bytes_to_utf8((U8*)pv2, &cur2);
5482 svrecode = newSVpvn(pv1, cur1);
5483 sv_recode_to_utf8(svrecode, PL_encoding);
5484 pv1 = SvPV(svrecode, cur1);
5487 pv1 = tpv = (char*)bytes_to_utf8((U8*)pv1, &cur1);
5493 cmp = cur2 ? -1 : 0;
5497 I32 retval = memcmp((void*)pv1, (void*)pv2, cur1 < cur2 ? cur1 : cur2);
5500 cmp = retval < 0 ? -1 : 1;
5501 } else if (cur1 == cur2) {
5504 cmp = cur1 < cur2 ? -1 : 1;
5509 SvREFCNT_dec(svrecode);
5518 =for apidoc sv_cmp_locale
5520 Compares the strings in two SVs in a locale-aware manner. Is UTF-8 and
5521 'use bytes' aware, handles get magic, and will coerce its args to strings
5522 if necessary. See also C<sv_cmp_locale>. See also C<sv_cmp>.
5528 Perl_sv_cmp_locale(pTHX_ register SV *sv1, register SV *sv2)
5530 #ifdef USE_LOCALE_COLLATE
5536 if (PL_collation_standard)
5540 pv1 = sv1 ? sv_collxfrm(sv1, &len1) : (char *) NULL;
5542 pv2 = sv2 ? sv_collxfrm(sv2, &len2) : (char *) NULL;
5544 if (!pv1 || !len1) {
5555 retval = memcmp((void*)pv1, (void*)pv2, len1 < len2 ? len1 : len2);
5558 return retval < 0 ? -1 : 1;
5561 * When the result of collation is equality, that doesn't mean
5562 * that there are no differences -- some locales exclude some
5563 * characters from consideration. So to avoid false equalities,
5564 * we use the raw string as a tiebreaker.
5570 #endif /* USE_LOCALE_COLLATE */
5572 return sv_cmp(sv1, sv2);
5576 #ifdef USE_LOCALE_COLLATE
5579 =for apidoc sv_collxfrm
5581 Add Collate Transform magic to an SV if it doesn't already have it.
5583 Any scalar variable may carry PERL_MAGIC_collxfrm magic that contains the
5584 scalar data of the variable, but transformed to such a format that a normal
5585 memory comparison can be used to compare the data according to the locale
5592 Perl_sv_collxfrm(pTHX_ SV *sv, STRLEN *nxp)
5596 mg = SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_collxfrm) : (MAGIC *) NULL;
5597 if (!mg || !mg->mg_ptr || *(U32*)mg->mg_ptr != PL_collation_ix) {
5602 Safefree(mg->mg_ptr);
5604 if ((xf = mem_collxfrm(s, len, &xlen))) {
5605 if (SvREADONLY(sv)) {
5608 return xf + sizeof(PL_collation_ix);
5611 sv_magic(sv, 0, PERL_MAGIC_collxfrm, 0, 0);
5612 mg = mg_find(sv, PERL_MAGIC_collxfrm);
5625 if (mg && mg->mg_ptr) {
5627 return mg->mg_ptr + sizeof(PL_collation_ix);
5635 #endif /* USE_LOCALE_COLLATE */
5640 Get a line from the filehandle and store it into the SV, optionally
5641 appending to the currently-stored string.
5647 Perl_sv_gets(pTHX_ register SV *sv, register PerlIO *fp, I32 append)
5651 register STDCHAR rslast;
5652 register STDCHAR *bp;
5657 SV_CHECK_THINKFIRST(sv);
5658 (void)SvUPGRADE(sv, SVt_PV);
5662 if (PL_curcop == &PL_compiling) {
5663 /* we always read code in line mode */
5667 else if (RsSNARF(PL_rs)) {
5671 else if (RsRECORD(PL_rs)) {
5672 I32 recsize, bytesread;
5675 /* Grab the size of the record we're getting */
5676 recsize = SvIV(SvRV(PL_rs));
5677 (void)SvPOK_only(sv); /* Validate pointer */
5678 buffer = SvGROW(sv, recsize + 1);
5681 /* VMS wants read instead of fread, because fread doesn't respect */
5682 /* RMS record boundaries. This is not necessarily a good thing to be */
5683 /* doing, but we've got no other real choice */
5684 bytesread = PerlLIO_read(PerlIO_fileno(fp), buffer, recsize);
5686 bytesread = PerlIO_read(fp, buffer, recsize);
5688 SvCUR_set(sv, bytesread);
5689 buffer[bytesread] = '\0';
5690 if (PerlIO_isutf8(fp))
5694 return(SvCUR(sv) ? SvPVX(sv) : Nullch);
5696 else if (RsPARA(PL_rs)) {
5702 /* Get $/ i.e. PL_rs into same encoding as stream wants */
5703 if (PerlIO_isutf8(fp)) {
5704 rsptr = SvPVutf8(PL_rs, rslen);
5707 if (SvUTF8(PL_rs)) {
5708 if (!sv_utf8_downgrade(PL_rs, TRUE)) {
5709 Perl_croak(aTHX_ "Wide character in $/");
5712 rsptr = SvPV(PL_rs, rslen);
5716 rslast = rslen ? rsptr[rslen - 1] : '\0';
5718 if (rspara) { /* have to do this both before and after */
5719 do { /* to make sure file boundaries work right */
5722 i = PerlIO_getc(fp);
5726 PerlIO_ungetc(fp,i);
5732 /* See if we know enough about I/O mechanism to cheat it ! */
5734 /* This used to be #ifdef test - it is made run-time test for ease
5735 of abstracting out stdio interface. One call should be cheap
5736 enough here - and may even be a macro allowing compile
5740 if (PerlIO_fast_gets(fp)) {
5743 * We're going to steal some values from the stdio struct
5744 * and put EVERYTHING in the innermost loop into registers.
5746 register STDCHAR *ptr;
5750 #if defined(VMS) && defined(PERLIO_IS_STDIO)
5751 /* An ungetc()d char is handled separately from the regular
5752 * buffer, so we getc() it back out and stuff it in the buffer.
5754 i = PerlIO_getc(fp);
5755 if (i == EOF) return 0;
5756 *(--((*fp)->_ptr)) = (unsigned char) i;
5760 /* Here is some breathtakingly efficient cheating */
5762 cnt = PerlIO_get_cnt(fp); /* get count into register */
5763 (void)SvPOK_only(sv); /* validate pointer */
5764 if (SvLEN(sv) - append <= cnt + 1) { /* make sure we have the room */
5765 if (cnt > 80 && SvLEN(sv) > append) {
5766 shortbuffered = cnt - SvLEN(sv) + append + 1;
5767 cnt -= shortbuffered;
5771 /* remember that cnt can be negative */
5772 SvGROW(sv, append + (cnt <= 0 ? 2 : (cnt + 1)));
5777 bp = (STDCHAR*)SvPVX(sv) + append; /* move these two too to registers */
5778 ptr = (STDCHAR*)PerlIO_get_ptr(fp);
5779 DEBUG_P(PerlIO_printf(Perl_debug_log,
5780 "Screamer: entering, ptr=%"UVuf", cnt=%ld\n",PTR2UV(ptr),(long)cnt));
5781 DEBUG_P(PerlIO_printf(Perl_debug_log,
5782 "Screamer: entering: PerlIO * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
5783 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
5784 PTR2UV(PerlIO_has_base(fp) ? PerlIO_get_base(fp) : 0)));
5789 while (cnt > 0) { /* this | eat */
5791 if ((*bp++ = *ptr++) == rslast) /* really | dust */
5792 goto thats_all_folks; /* screams | sed :-) */
5796 Copy(ptr, bp, cnt, char); /* this | eat */
5797 bp += cnt; /* screams | dust */
5798 ptr += cnt; /* louder | sed :-) */
5803 if (shortbuffered) { /* oh well, must extend */
5804 cnt = shortbuffered;
5806 bpx = bp - (STDCHAR*)SvPVX(sv); /* box up before relocation */
5808 SvGROW(sv, SvLEN(sv) + append + cnt + 2);
5809 bp = (STDCHAR*)SvPVX(sv) + bpx; /* unbox after relocation */
5813 DEBUG_P(PerlIO_printf(Perl_debug_log,
5814 "Screamer: going to getc, ptr=%"UVuf", cnt=%ld\n",
5815 PTR2UV(ptr),(long)cnt));
5816 PerlIO_set_ptrcnt(fp, (STDCHAR*)ptr, cnt); /* deregisterize cnt and ptr */
5818 DEBUG_P(PerlIO_printf(Perl_debug_log,
5819 "Screamer: pre: FILE * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
5820 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
5821 PTR2UV(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0)));
5823 /* This used to call 'filbuf' in stdio form, but as that behaves like
5824 getc when cnt <= 0 we use PerlIO_getc here to avoid introducing
5825 another abstraction. */
5826 i = PerlIO_getc(fp); /* get more characters */
5828 DEBUG_P(PerlIO_printf(Perl_debug_log,
5829 "Screamer: post: FILE * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
5830 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
5831 PTR2UV(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0)));
5833 cnt = PerlIO_get_cnt(fp);
5834 ptr = (STDCHAR*)PerlIO_get_ptr(fp); /* reregisterize cnt and ptr */
5835 DEBUG_P(PerlIO_printf(Perl_debug_log,
5836 "Screamer: after getc, ptr=%"UVuf", cnt=%ld\n",PTR2UV(ptr),(long)cnt));
5838 if (i == EOF) /* all done for ever? */
5839 goto thats_really_all_folks;
5841 bpx = bp - (STDCHAR*)SvPVX(sv); /* box up before relocation */
5843 SvGROW(sv, bpx + cnt + 2);
5844 bp = (STDCHAR*)SvPVX(sv) + bpx; /* unbox after relocation */
5846 *bp++ = i; /* store character from PerlIO_getc */
5848 if (rslen && (STDCHAR)i == rslast) /* all done for now? */
5849 goto thats_all_folks;
5853 if ((rslen > 1 && (bp - (STDCHAR*)SvPVX(sv) < rslen)) ||
5854 memNE((char*)bp - rslen, rsptr, rslen))
5855 goto screamer; /* go back to the fray */
5856 thats_really_all_folks:
5858 cnt += shortbuffered;
5859 DEBUG_P(PerlIO_printf(Perl_debug_log,
5860 "Screamer: quitting, ptr=%"UVuf", cnt=%ld\n",PTR2UV(ptr),(long)cnt));
5861 PerlIO_set_ptrcnt(fp, (STDCHAR*)ptr, cnt); /* put these back or we're in trouble */
5862 DEBUG_P(PerlIO_printf(Perl_debug_log,
5863 "Screamer: end: FILE * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
5864 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
5865 PTR2UV(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0)));
5867 SvCUR_set(sv, bp - (STDCHAR*)SvPVX(sv)); /* set length */
5868 DEBUG_P(PerlIO_printf(Perl_debug_log,
5869 "Screamer: done, len=%ld, string=|%.*s|\n",
5870 (long)SvCUR(sv),(int)SvCUR(sv),SvPVX(sv)));
5875 /*The big, slow, and stupid way */
5878 /* Need to work around EPOC SDK features */
5879 /* On WINS: MS VC5 generates calls to _chkstk, */
5880 /* if a `large' stack frame is allocated */
5881 /* gcc on MARM does not generate calls like these */
5887 register STDCHAR *bpe = buf + sizeof(buf);
5889 while ((i = PerlIO_getc(fp)) != EOF && (*bp++ = i) != rslast && bp < bpe)
5890 ; /* keep reading */
5894 cnt = PerlIO_read(fp,(char*)buf, sizeof(buf));
5895 /* Accomodate broken VAXC compiler, which applies U8 cast to
5896 * both args of ?: operator, causing EOF to change into 255
5898 if (cnt) { i = (U8)buf[cnt - 1]; } else { i = EOF; }
5902 sv_catpvn(sv, (char *) buf, cnt);
5904 sv_setpvn(sv, (char *) buf, cnt);
5906 if (i != EOF && /* joy */
5908 SvCUR(sv) < rslen ||
5909 memNE(SvPVX(sv) + SvCUR(sv) - rslen, rsptr, rslen)))
5913 * If we're reading from a TTY and we get a short read,
5914 * indicating that the user hit his EOF character, we need
5915 * to notice it now, because if we try to read from the TTY
5916 * again, the EOF condition will disappear.
5918 * The comparison of cnt to sizeof(buf) is an optimization
5919 * that prevents unnecessary calls to feof().
5923 if (!(cnt < sizeof(buf) && PerlIO_eof(fp)))
5928 if (rspara) { /* have to do this both before and after */
5929 while (i != EOF) { /* to make sure file boundaries work right */
5930 i = PerlIO_getc(fp);
5932 PerlIO_ungetc(fp,i);
5938 if (PerlIO_isutf8(fp))
5943 return (SvCUR(sv) - append) ? SvPVX(sv) : Nullch;
5949 Auto-increment of the value in the SV, doing string to numeric conversion
5950 if necessary. Handles 'get' magic.
5956 Perl_sv_inc(pTHX_ register SV *sv)
5965 if (SvTHINKFIRST(sv)) {
5966 if (SvREADONLY(sv) && SvFAKE(sv))
5967 sv_force_normal(sv);
5968 if (SvREADONLY(sv)) {
5969 if (PL_curcop != &PL_compiling)
5970 Perl_croak(aTHX_ PL_no_modify);
5974 if (SvAMAGIC(sv) && AMG_CALLun(sv,inc))
5976 i = PTR2IV(SvRV(sv));
5981 flags = SvFLAGS(sv);
5982 if ((flags & (SVp_NOK|SVp_IOK)) == SVp_NOK) {
5983 /* It's (privately or publicly) a float, but not tested as an
5984 integer, so test it to see. */
5986 flags = SvFLAGS(sv);
5988 if ((flags & SVf_IOK) || ((flags & (SVp_IOK | SVp_NOK)) == SVp_IOK)) {
5989 /* It's publicly an integer, or privately an integer-not-float */
5990 #ifdef PERL_PRESERVE_IVUV
5994 if (SvUVX(sv) == UV_MAX)
5995 sv_setnv(sv, UV_MAX_P1);
5997 (void)SvIOK_only_UV(sv);
6000 if (SvIVX(sv) == IV_MAX)
6001 sv_setuv(sv, (UV)IV_MAX + 1);
6003 (void)SvIOK_only(sv);
6009 if (flags & SVp_NOK) {
6010 (void)SvNOK_only(sv);
6015 if (!(flags & SVp_POK) || !*SvPVX(sv)) {
6016 if ((flags & SVTYPEMASK) < SVt_PVIV)
6017 sv_upgrade(sv, SVt_IV);
6018 (void)SvIOK_only(sv);
6023 while (isALPHA(*d)) d++;
6024 while (isDIGIT(*d)) d++;
6026 #ifdef PERL_PRESERVE_IVUV
6027 /* Got to punt this as an integer if needs be, but we don't issue
6028 warnings. Probably ought to make the sv_iv_please() that does
6029 the conversion if possible, and silently. */
6030 int numtype = grok_number(SvPVX(sv), SvCUR(sv), NULL);
6031 if (numtype && !(numtype & IS_NUMBER_INFINITY)) {
6032 /* Need to try really hard to see if it's an integer.
6033 9.22337203685478e+18 is an integer.
6034 but "9.22337203685478e+18" + 0 is UV=9223372036854779904
6035 so $a="9.22337203685478e+18"; $a+0; $a++
6036 needs to be the same as $a="9.22337203685478e+18"; $a++
6043 /* sv_2iv *should* have made this an NV */
6044 if (flags & SVp_NOK) {
6045 (void)SvNOK_only(sv);
6049 /* I don't think we can get here. Maybe I should assert this
6050 And if we do get here I suspect that sv_setnv will croak. NWC
6052 #if defined(USE_LONG_DOUBLE)
6053 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",
6054 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
6056 DEBUG_c(PerlIO_printf(Perl_debug_log,"sv_inc punt failed to convert '%s' to IOK or NOKp, UV=0x%"UVxf" NV=%"NVgf"\n",
6057 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
6060 #endif /* PERL_PRESERVE_IVUV */
6061 sv_setnv(sv,Atof(SvPVX(sv)) + 1.0);
6065 while (d >= SvPVX(sv)) {
6073 /* MKS: The original code here died if letters weren't consecutive.
6074 * at least it didn't have to worry about non-C locales. The
6075 * new code assumes that ('z'-'a')==('Z'-'A'), letters are
6076 * arranged in order (although not consecutively) and that only
6077 * [A-Za-z] are accepted by isALPHA in the C locale.
6079 if (*d != 'z' && *d != 'Z') {
6080 do { ++*d; } while (!isALPHA(*d));
6083 *(d--) -= 'z' - 'a';
6088 *(d--) -= 'z' - 'a' + 1;
6092 /* oh,oh, the number grew */
6093 SvGROW(sv, SvCUR(sv) + 2);
6095 for (d = SvPVX(sv) + SvCUR(sv); d > SvPVX(sv); d--)
6106 Auto-decrement of the value in the SV, doing string to numeric conversion
6107 if necessary. Handles 'get' magic.
6113 Perl_sv_dec(pTHX_ register SV *sv)
6121 if (SvTHINKFIRST(sv)) {
6122 if (SvREADONLY(sv) && SvFAKE(sv))
6123 sv_force_normal(sv);
6124 if (SvREADONLY(sv)) {
6125 if (PL_curcop != &PL_compiling)
6126 Perl_croak(aTHX_ PL_no_modify);
6130 if (SvAMAGIC(sv) && AMG_CALLun(sv,dec))
6132 i = PTR2IV(SvRV(sv));
6137 /* Unlike sv_inc we don't have to worry about string-never-numbers
6138 and keeping them magic. But we mustn't warn on punting */
6139 flags = SvFLAGS(sv);
6140 if ((flags & SVf_IOK) || ((flags & (SVp_IOK | SVp_NOK)) == SVp_IOK)) {
6141 /* It's publicly an integer, or privately an integer-not-float */
6142 #ifdef PERL_PRESERVE_IVUV
6146 if (SvUVX(sv) == 0) {
6147 (void)SvIOK_only(sv);
6151 (void)SvIOK_only_UV(sv);
6155 if (SvIVX(sv) == IV_MIN)
6156 sv_setnv(sv, (NV)IV_MIN - 1.0);
6158 (void)SvIOK_only(sv);
6164 if (flags & SVp_NOK) {
6166 (void)SvNOK_only(sv);
6169 if (!(flags & SVp_POK)) {
6170 if ((flags & SVTYPEMASK) < SVt_PVNV)
6171 sv_upgrade(sv, SVt_NV);
6173 (void)SvNOK_only(sv);
6176 #ifdef PERL_PRESERVE_IVUV
6178 int numtype = grok_number(SvPVX(sv), SvCUR(sv), NULL);
6179 if (numtype && !(numtype & IS_NUMBER_INFINITY)) {
6180 /* Need to try really hard to see if it's an integer.
6181 9.22337203685478e+18 is an integer.
6182 but "9.22337203685478e+18" + 0 is UV=9223372036854779904
6183 so $a="9.22337203685478e+18"; $a+0; $a--
6184 needs to be the same as $a="9.22337203685478e+18"; $a--
6191 /* sv_2iv *should* have made this an NV */
6192 if (flags & SVp_NOK) {
6193 (void)SvNOK_only(sv);
6197 /* I don't think we can get here. Maybe I should assert this
6198 And if we do get here I suspect that sv_setnv will croak. NWC
6200 #if defined(USE_LONG_DOUBLE)
6201 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",
6202 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
6204 DEBUG_c(PerlIO_printf(Perl_debug_log,"sv_dec punt failed to convert '%s' to IOK or NOKp, UV=0x%"UVxf" NV=%"NVgf"\n",
6205 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
6209 #endif /* PERL_PRESERVE_IVUV */
6210 sv_setnv(sv,Atof(SvPVX(sv)) - 1.0); /* punt */
6214 =for apidoc sv_mortalcopy
6216 Creates a new SV which is a copy of the original SV (using C<sv_setsv>).
6217 The new SV is marked as mortal. It will be destroyed "soon", either by an
6218 explicit call to FREETMPS, or by an implicit call at places such as
6219 statement boundaries. See also C<sv_newmortal> and C<sv_2mortal>.
6224 /* Make a string that will exist for the duration of the expression
6225 * evaluation. Actually, it may have to last longer than that, but
6226 * hopefully we won't free it until it has been assigned to a
6227 * permanent location. */
6230 Perl_sv_mortalcopy(pTHX_ SV *oldstr)
6235 sv_setsv(sv,oldstr);
6237 PL_tmps_stack[++PL_tmps_ix] = sv;
6243 =for apidoc sv_newmortal
6245 Creates a new null SV which is mortal. The reference count of the SV is
6246 set to 1. It will be destroyed "soon", either by an explicit call to
6247 FREETMPS, or by an implicit call at places such as statement boundaries.
6248 See also C<sv_mortalcopy> and C<sv_2mortal>.
6254 Perl_sv_newmortal(pTHX)
6259 SvFLAGS(sv) = SVs_TEMP;
6261 PL_tmps_stack[++PL_tmps_ix] = sv;
6266 =for apidoc sv_2mortal
6268 Marks an existing SV as mortal. The SV will be destroyed "soon", either
6269 by an explicit call to FREETMPS, or by an implicit call at places such as
6270 statement boundaries. See also C<sv_newmortal> and C<sv_mortalcopy>.
6276 Perl_sv_2mortal(pTHX_ register SV *sv)
6280 if (SvREADONLY(sv) && SvIMMORTAL(sv))
6283 PL_tmps_stack[++PL_tmps_ix] = sv;
6291 Creates a new SV and copies a string into it. The reference count for the
6292 SV is set to 1. If C<len> is zero, Perl will compute the length using
6293 strlen(). For efficiency, consider using C<newSVpvn> instead.
6299 Perl_newSVpv(pTHX_ const char *s, STRLEN len)
6306 sv_setpvn(sv,s,len);
6311 =for apidoc newSVpvn
6313 Creates a new SV and copies a string into it. The reference count for the
6314 SV is set to 1. Note that if C<len> is zero, Perl will create a zero length
6315 string. You are responsible for ensuring that the source string is at least
6322 Perl_newSVpvn(pTHX_ const char *s, STRLEN len)
6327 sv_setpvn(sv,s,len);
6332 =for apidoc newSVpvn_share
6334 Creates a new SV with its SvPVX pointing to a shared string in the string
6335 table. If the string does not already exist in the table, it is created
6336 first. Turns on READONLY and FAKE. The string's hash is stored in the UV
6337 slot of the SV; if the C<hash> parameter is non-zero, that value is used;
6338 otherwise the hash is computed. The idea here is that as the string table
6339 is used for shared hash keys these strings will have SvPVX == HeKEY and
6340 hash lookup will avoid string compare.
6346 Perl_newSVpvn_share(pTHX_ const char *src, I32 len, U32 hash)
6349 bool is_utf8 = FALSE;
6351 STRLEN tmplen = -len;
6353 /* See the note in hv.c:hv_fetch() --jhi */
6354 src = (char*)bytes_from_utf8((U8*)src, &tmplen, &is_utf8);
6358 PERL_HASH(hash, src, len);
6360 sv_upgrade(sv, SVt_PVIV);
6361 SvPVX(sv) = sharepvn(src, is_utf8?-len:len, hash);
6374 #if defined(PERL_IMPLICIT_CONTEXT)
6376 /* pTHX_ magic can't cope with varargs, so this is a no-context
6377 * version of the main function, (which may itself be aliased to us).
6378 * Don't access this version directly.
6382 Perl_newSVpvf_nocontext(const char* pat, ...)
6387 va_start(args, pat);
6388 sv = vnewSVpvf(pat, &args);
6395 =for apidoc newSVpvf
6397 Creates a new SV and initializes it with the string formatted like
6404 Perl_newSVpvf(pTHX_ const char* pat, ...)
6408 va_start(args, pat);
6409 sv = vnewSVpvf(pat, &args);
6414 /* backend for newSVpvf() and newSVpvf_nocontext() */
6417 Perl_vnewSVpvf(pTHX_ const char* pat, va_list* args)
6421 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
6428 Creates a new SV and copies a floating point value into it.
6429 The reference count for the SV is set to 1.
6435 Perl_newSVnv(pTHX_ NV n)
6447 Creates a new SV and copies an integer into it. The reference count for the
6454 Perl_newSViv(pTHX_ IV i)
6466 Creates a new SV and copies an unsigned integer into it.
6467 The reference count for the SV is set to 1.
6473 Perl_newSVuv(pTHX_ UV u)
6483 =for apidoc newRV_noinc
6485 Creates an RV wrapper for an SV. The reference count for the original
6486 SV is B<not> incremented.
6492 Perl_newRV_noinc(pTHX_ SV *tmpRef)
6497 sv_upgrade(sv, SVt_RV);
6504 /* newRV_inc is the official function name to use now.
6505 * newRV_inc is in fact #defined to newRV in sv.h
6509 Perl_newRV(pTHX_ SV *tmpRef)
6511 return newRV_noinc(SvREFCNT_inc(tmpRef));
6517 Creates a new SV which is an exact duplicate of the original SV.
6524 Perl_newSVsv(pTHX_ register SV *old)
6530 if (SvTYPE(old) == SVTYPEMASK) {
6531 if (ckWARN_d(WARN_INTERNAL))
6532 Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "semi-panic: attempt to dup freed string");
6547 =for apidoc sv_reset
6549 Underlying implementation for the C<reset> Perl function.
6550 Note that the perl-level function is vaguely deprecated.
6556 Perl_sv_reset(pTHX_ register char *s, HV *stash)
6564 char todo[PERL_UCHAR_MAX+1];
6569 if (!*s) { /* reset ?? searches */
6570 for (pm = HvPMROOT(stash); pm; pm = pm->op_pmnext) {
6571 pm->op_pmdynflags &= ~PMdf_USED;
6576 /* reset variables */
6578 if (!HvARRAY(stash))
6581 Zero(todo, 256, char);
6583 i = (unsigned char)*s;
6587 max = (unsigned char)*s++;
6588 for ( ; i <= max; i++) {
6591 for (i = 0; i <= (I32) HvMAX(stash); i++) {
6592 for (entry = HvARRAY(stash)[i];
6594 entry = HeNEXT(entry))
6596 if (!todo[(U8)*HeKEY(entry)])
6598 gv = (GV*)HeVAL(entry);
6600 if (SvTHINKFIRST(sv)) {
6601 if (!SvREADONLY(sv) && SvROK(sv))
6606 if (SvTYPE(sv) >= SVt_PV) {
6608 if (SvPVX(sv) != Nullch)
6615 if (GvHV(gv) && !HvNAME(GvHV(gv))) {
6617 #ifdef USE_ENVIRON_ARRAY
6619 environ[0] = Nullch;
6630 Using various gambits, try to get an IO from an SV: the IO slot if its a
6631 GV; or the recursive result if we're an RV; or the IO slot of the symbol
6632 named after the PV if we're a string.
6638 Perl_sv_2io(pTHX_ SV *sv)
6644 switch (SvTYPE(sv)) {
6652 Perl_croak(aTHX_ "Bad filehandle: %s", GvNAME(gv));
6656 Perl_croak(aTHX_ PL_no_usym, "filehandle");
6658 return sv_2io(SvRV(sv));
6659 gv = gv_fetchpv(SvPV(sv,n_a), FALSE, SVt_PVIO);
6665 Perl_croak(aTHX_ "Bad filehandle: %s", SvPV(sv,n_a));
6674 Using various gambits, try to get a CV from an SV; in addition, try if
6675 possible to set C<*st> and C<*gvp> to the stash and GV associated with it.
6681 Perl_sv_2cv(pTHX_ SV *sv, HV **st, GV **gvp, I32 lref)
6688 return *gvp = Nullgv, Nullcv;
6689 switch (SvTYPE(sv)) {
6708 SV **sp = &sv; /* Used in tryAMAGICunDEREF macro. */
6709 tryAMAGICunDEREF(to_cv);
6712 if (SvTYPE(sv) == SVt_PVCV) {
6721 Perl_croak(aTHX_ "Not a subroutine reference");
6726 gv = gv_fetchpv(SvPV(sv, n_a), lref, SVt_PVCV);
6732 if (lref && !GvCVu(gv)) {
6735 tmpsv = NEWSV(704,0);
6736 gv_efullname3(tmpsv, gv, Nullch);
6737 /* XXX this is probably not what they think they're getting.
6738 * It has the same effect as "sub name;", i.e. just a forward
6740 newSUB(start_subparse(FALSE, 0),
6741 newSVOP(OP_CONST, 0, tmpsv),
6746 Perl_croak(aTHX_ "Unable to create sub named \"%s\"", SvPV(sv,n_a));
6755 Returns true if the SV has a true value by Perl's rules.
6756 Use the C<SvTRUE> macro instead, which may call C<sv_true()> or may
6757 instead use an in-line version.
6763 Perl_sv_true(pTHX_ register SV *sv)
6769 if ((tXpv = (XPV*)SvANY(sv)) &&
6770 (tXpv->xpv_cur > 1 ||
6771 (tXpv->xpv_cur && *tXpv->xpv_pv != '0')))
6778 return SvIVX(sv) != 0;
6781 return SvNVX(sv) != 0.0;
6783 return sv_2bool(sv);
6791 A private implementation of the C<SvIVx> macro for compilers which can't
6792 cope with complex macro expressions. Always use the macro instead.
6798 Perl_sv_iv(pTHX_ register SV *sv)
6802 return (IV)SvUVX(sv);
6811 A private implementation of the C<SvUVx> macro for compilers which can't
6812 cope with complex macro expressions. Always use the macro instead.
6818 Perl_sv_uv(pTHX_ register SV *sv)
6823 return (UV)SvIVX(sv);
6831 A private implementation of the C<SvNVx> macro for compilers which can't
6832 cope with complex macro expressions. Always use the macro instead.
6838 Perl_sv_nv(pTHX_ register SV *sv)
6848 A private implementation of the C<SvPV_nolen> macro for compilers which can't
6849 cope with complex macro expressions. Always use the macro instead.
6855 Perl_sv_pv(pTHX_ SV *sv)
6862 return sv_2pv(sv, &n_a);
6868 A private implementation of the C<SvPV> macro for compilers which can't
6869 cope with complex macro expressions. Always use the macro instead.
6875 Perl_sv_pvn(pTHX_ SV *sv, STRLEN *lp)
6881 return sv_2pv(sv, lp);
6884 /* For -DCRIPPLED_CC only. See also C<sv_2pv_flags()>.
6888 Perl_sv_pvn_nomg(pTHX_ register SV *sv, STRLEN *lp)
6894 return sv_2pv_flags(sv, lp, 0);
6898 =for apidoc sv_pvn_force
6900 Get a sensible string out of the SV somehow.
6901 A private implementation of the C<SvPV_force> macro for compilers which
6902 can't cope with complex macro expressions. Always use the macro instead.
6908 Perl_sv_pvn_force(pTHX_ SV *sv, STRLEN *lp)
6910 return sv_pvn_force_flags(sv, lp, SV_GMAGIC);
6914 =for apidoc sv_pvn_force_flags
6916 Get a sensible string out of the SV somehow.
6917 If C<flags> has C<SV_GMAGIC> bit set, will C<mg_get> on C<sv> if
6918 appropriate, else not. C<sv_pvn_force> and C<sv_pvn_force_nomg> are
6919 implemented in terms of this function.
6920 You normally want to use the various wrapper macros instead: see
6921 C<SvPV_force> and C<SvPV_force_nomg>
6927 Perl_sv_pvn_force_flags(pTHX_ SV *sv, STRLEN *lp, I32 flags)
6931 if (SvTHINKFIRST(sv) && !SvROK(sv))
6932 sv_force_normal(sv);
6938 if (SvTYPE(sv) > SVt_PVLV && SvTYPE(sv) != SVt_PVFM) {
6939 Perl_croak(aTHX_ "Can't coerce %s to string in %s", sv_reftype(sv,0),
6943 s = sv_2pv_flags(sv, lp, flags);
6944 if (s != SvPVX(sv)) { /* Almost, but not quite, sv_setpvn() */
6949 (void)SvUPGRADE(sv, SVt_PV); /* Never FALSE */
6950 SvGROW(sv, len + 1);
6951 Move(s,SvPVX(sv),len,char);
6956 SvPOK_on(sv); /* validate pointer */
6958 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2pv(%s)\n",
6959 PTR2UV(sv),SvPVX(sv)));
6966 =for apidoc sv_pvbyte
6968 A private implementation of the C<SvPVbyte_nolen> macro for compilers
6969 which can't cope with complex macro expressions. Always use the macro
6976 Perl_sv_pvbyte(pTHX_ SV *sv)
6978 sv_utf8_downgrade(sv,0);
6983 =for apidoc sv_pvbyten
6985 A private implementation of the C<SvPVbyte> macro for compilers
6986 which can't cope with complex macro expressions. Always use the macro
6993 Perl_sv_pvbyten(pTHX_ SV *sv, STRLEN *lp)
6995 sv_utf8_downgrade(sv,0);
6996 return sv_pvn(sv,lp);
7000 =for apidoc sv_pvbyten_force
7002 A private implementation of the C<SvPVbytex_force> macro for compilers
7003 which can't cope with complex macro expressions. Always use the macro
7010 Perl_sv_pvbyten_force(pTHX_ SV *sv, STRLEN *lp)
7012 sv_utf8_downgrade(sv,0);
7013 return sv_pvn_force(sv,lp);
7017 =for apidoc sv_pvutf8
7019 A private implementation of the C<SvPVutf8_nolen> macro for compilers
7020 which can't cope with complex macro expressions. Always use the macro
7027 Perl_sv_pvutf8(pTHX_ SV *sv)
7029 sv_utf8_upgrade(sv);
7034 =for apidoc sv_pvutf8n
7036 A private implementation of the C<SvPVutf8> macro for compilers
7037 which can't cope with complex macro expressions. Always use the macro
7044 Perl_sv_pvutf8n(pTHX_ SV *sv, STRLEN *lp)
7046 sv_utf8_upgrade(sv);
7047 return sv_pvn(sv,lp);
7051 =for apidoc sv_pvutf8n_force
7053 A private implementation of the C<SvPVutf8_force> macro for compilers
7054 which can't cope with complex macro expressions. Always use the macro
7061 Perl_sv_pvutf8n_force(pTHX_ SV *sv, STRLEN *lp)
7063 sv_utf8_upgrade(sv);
7064 return sv_pvn_force(sv,lp);
7068 =for apidoc sv_reftype
7070 Returns a string describing what the SV is a reference to.
7076 Perl_sv_reftype(pTHX_ SV *sv, int ob)
7078 if (ob && SvOBJECT(sv)) {
7079 HV *svs = SvSTASH(sv);
7080 /* [20011101.072] This bandaid for C<package;> should eventually
7081 be removed. AMS 20011103 */
7082 return (svs ? HvNAME(svs) : "<none>");
7085 switch (SvTYPE(sv)) {
7099 case SVt_PVLV: return "LVALUE";
7100 case SVt_PVAV: return "ARRAY";
7101 case SVt_PVHV: return "HASH";
7102 case SVt_PVCV: return "CODE";
7103 case SVt_PVGV: return "GLOB";
7104 case SVt_PVFM: return "FORMAT";
7105 case SVt_PVIO: return "IO";
7106 default: return "UNKNOWN";
7112 =for apidoc sv_isobject
7114 Returns a boolean indicating whether the SV is an RV pointing to a blessed
7115 object. If the SV is not an RV, or if the object is not blessed, then this
7122 Perl_sv_isobject(pTHX_ SV *sv)
7139 Returns a boolean indicating whether the SV is blessed into the specified
7140 class. This does not check for subtypes; use C<sv_derived_from> to verify
7141 an inheritance relationship.
7147 Perl_sv_isa(pTHX_ SV *sv, const char *name)
7159 return strEQ(HvNAME(SvSTASH(sv)), name);
7165 Creates a new SV for the RV, C<rv>, to point to. If C<rv> is not an RV then
7166 it will be upgraded to one. If C<classname> is non-null then the new SV will
7167 be blessed in the specified package. The new SV is returned and its
7168 reference count is 1.
7174 Perl_newSVrv(pTHX_ SV *rv, const char *classname)
7180 SV_CHECK_THINKFIRST(rv);
7183 if (SvTYPE(rv) >= SVt_PVMG) {
7184 U32 refcnt = SvREFCNT(rv);
7188 SvREFCNT(rv) = refcnt;
7191 if (SvTYPE(rv) < SVt_RV)
7192 sv_upgrade(rv, SVt_RV);
7193 else if (SvTYPE(rv) > SVt_RV) {
7194 (void)SvOOK_off(rv);
7195 if (SvPVX(rv) && SvLEN(rv))
7196 Safefree(SvPVX(rv));
7206 HV* stash = gv_stashpv(classname, TRUE);
7207 (void)sv_bless(rv, stash);
7213 =for apidoc sv_setref_pv
7215 Copies a pointer into a new SV, optionally blessing the SV. The C<rv>
7216 argument will be upgraded to an RV. That RV will be modified to point to
7217 the new SV. If the C<pv> argument is NULL then C<PL_sv_undef> will be placed
7218 into the 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.
7222 Do not use with other Perl types such as HV, AV, SV, CV, because those
7223 objects will become corrupted by the pointer copy process.
7225 Note that C<sv_setref_pvn> copies the string while this copies the pointer.
7231 Perl_sv_setref_pv(pTHX_ SV *rv, const char *classname, void *pv)
7234 sv_setsv(rv, &PL_sv_undef);
7238 sv_setiv(newSVrv(rv,classname), PTR2IV(pv));
7243 =for apidoc sv_setref_iv
7245 Copies an integer into a new SV, optionally blessing the SV. The C<rv>
7246 argument will be upgraded to an RV. That RV will be modified to point to
7247 the new SV. The C<classname> argument indicates the package for the
7248 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
7249 will be returned and will have a reference count of 1.
7255 Perl_sv_setref_iv(pTHX_ SV *rv, const char *classname, IV iv)
7257 sv_setiv(newSVrv(rv,classname), iv);
7262 =for apidoc sv_setref_uv
7264 Copies an unsigned integer into a new SV, optionally blessing the SV. The C<rv>
7265 argument will be upgraded to an RV. That RV will be modified to point to
7266 the new SV. The C<classname> argument indicates the package for the
7267 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
7268 will be returned and will have a reference count of 1.
7274 Perl_sv_setref_uv(pTHX_ SV *rv, const char *classname, UV uv)
7276 sv_setuv(newSVrv(rv,classname), uv);
7281 =for apidoc sv_setref_nv
7283 Copies a double into a new SV, optionally blessing the SV. The C<rv>
7284 argument will be upgraded to an RV. That RV will be modified to point to
7285 the new SV. The C<classname> argument indicates the package for the
7286 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
7287 will be returned and will have a reference count of 1.
7293 Perl_sv_setref_nv(pTHX_ SV *rv, const char *classname, NV nv)
7295 sv_setnv(newSVrv(rv,classname), nv);
7300 =for apidoc sv_setref_pvn
7302 Copies a string into a new SV, optionally blessing the SV. The length of the
7303 string must be specified with C<n>. The C<rv> argument will be upgraded to
7304 an RV. That RV will be modified to point to the new SV. The C<classname>
7305 argument indicates the package for the blessing. Set C<classname> to
7306 C<Nullch> to avoid the blessing. The new SV will be returned and will have
7307 a reference count of 1.
7309 Note that C<sv_setref_pv> copies the pointer while this copies the string.
7315 Perl_sv_setref_pvn(pTHX_ SV *rv, const char *classname, char *pv, STRLEN n)
7317 sv_setpvn(newSVrv(rv,classname), pv, n);
7322 =for apidoc sv_bless
7324 Blesses an SV into a specified package. The SV must be an RV. The package
7325 must be designated by its stash (see C<gv_stashpv()>). The reference count
7326 of the SV is unaffected.
7332 Perl_sv_bless(pTHX_ SV *sv, HV *stash)
7336 Perl_croak(aTHX_ "Can't bless non-reference value");
7338 if (SvFLAGS(tmpRef) & (SVs_OBJECT|SVf_READONLY)) {
7339 if (SvREADONLY(tmpRef))
7340 Perl_croak(aTHX_ PL_no_modify);
7341 if (SvOBJECT(tmpRef)) {
7342 if (SvTYPE(tmpRef) != SVt_PVIO)
7344 SvREFCNT_dec(SvSTASH(tmpRef));
7347 SvOBJECT_on(tmpRef);
7348 if (SvTYPE(tmpRef) != SVt_PVIO)
7350 (void)SvUPGRADE(tmpRef, SVt_PVMG);
7351 SvSTASH(tmpRef) = (HV*)SvREFCNT_inc(stash);
7358 if(SvSMAGICAL(tmpRef))
7359 if(mg_find(tmpRef, PERL_MAGIC_ext) || mg_find(tmpRef, PERL_MAGIC_uvar))
7367 /* Downgrades a PVGV to a PVMG.
7369 * XXX This function doesn't actually appear to be used anywhere
7374 S_sv_unglob(pTHX_ SV *sv)
7378 assert(SvTYPE(sv) == SVt_PVGV);
7383 SvREFCNT_dec(GvSTASH(sv));
7384 GvSTASH(sv) = Nullhv;
7386 sv_unmagic(sv, PERL_MAGIC_glob);
7387 Safefree(GvNAME(sv));
7390 /* need to keep SvANY(sv) in the right arena */
7391 xpvmg = new_XPVMG();
7392 StructCopy(SvANY(sv), xpvmg, XPVMG);
7393 del_XPVGV(SvANY(sv));
7396 SvFLAGS(sv) &= ~SVTYPEMASK;
7397 SvFLAGS(sv) |= SVt_PVMG;
7401 =for apidoc sv_unref_flags
7403 Unsets the RV status of the SV, and decrements the reference count of
7404 whatever was being referenced by the RV. This can almost be thought of
7405 as a reversal of C<newSVrv>. The C<cflags> argument can contain
7406 C<SV_IMMEDIATE_UNREF> to force the reference count to be decremented
7407 (otherwise the decrementing is conditional on the reference count being
7408 different from one or the reference being a readonly SV).
7415 Perl_sv_unref_flags(pTHX_ SV *sv, U32 flags)
7419 if (SvWEAKREF(sv)) {
7427 if (SvREFCNT(rv) != 1 || SvREADONLY(rv) || flags) /* SV_IMMEDIATE_UNREF */
7429 else /* XXX Hack, but hard to make $a=$a->[1] work otherwise */
7430 sv_2mortal(rv); /* Schedule for freeing later */
7434 =for apidoc sv_unref
7436 Unsets the RV status of the SV, and decrements the reference count of
7437 whatever was being referenced by the RV. This can almost be thought of
7438 as a reversal of C<newSVrv>. This is C<sv_unref_flags> with the C<flag>
7439 being zero. See C<SvROK_off>.
7445 Perl_sv_unref(pTHX_ SV *sv)
7447 sv_unref_flags(sv, 0);
7451 =for apidoc sv_taint
7453 Taint an SV. Use C<SvTAINTED_on> instead.
7458 Perl_sv_taint(pTHX_ SV *sv)
7460 sv_magic((sv), Nullsv, PERL_MAGIC_taint, Nullch, 0);
7464 =for apidoc sv_untaint
7466 Untaint an SV. Use C<SvTAINTED_off> instead.
7471 Perl_sv_untaint(pTHX_ SV *sv)
7473 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) {
7474 MAGIC *mg = mg_find(sv, PERL_MAGIC_taint);
7481 =for apidoc sv_tainted
7483 Test an SV for taintedness. Use C<SvTAINTED> instead.
7488 Perl_sv_tainted(pTHX_ SV *sv)
7490 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) {
7491 MAGIC *mg = mg_find(sv, PERL_MAGIC_taint);
7492 if (mg && ((mg->mg_len & 1) || ((mg->mg_len & 2) && mg->mg_obj == sv)))
7499 =for apidoc sv_setpviv
7501 Copies an integer into the given SV, also updating its string value.
7502 Does not handle 'set' magic. See C<sv_setpviv_mg>.
7508 Perl_sv_setpviv(pTHX_ SV *sv, IV iv)
7510 char buf[TYPE_CHARS(UV)];
7512 char *ptr = uiv_2buf(buf, iv, 0, 0, &ebuf);
7514 sv_setpvn(sv, ptr, ebuf - ptr);
7518 =for apidoc sv_setpviv_mg
7520 Like C<sv_setpviv>, but also handles 'set' magic.
7526 Perl_sv_setpviv_mg(pTHX_ SV *sv, IV iv)
7528 char buf[TYPE_CHARS(UV)];
7530 char *ptr = uiv_2buf(buf, iv, 0, 0, &ebuf);
7532 sv_setpvn(sv, ptr, ebuf - ptr);
7536 #if defined(PERL_IMPLICIT_CONTEXT)
7538 /* pTHX_ magic can't cope with varargs, so this is a no-context
7539 * version of the main function, (which may itself be aliased to us).
7540 * Don't access this version directly.
7544 Perl_sv_setpvf_nocontext(SV *sv, const char* pat, ...)
7548 va_start(args, pat);
7549 sv_vsetpvf(sv, pat, &args);
7553 /* pTHX_ magic can't cope with varargs, so this is a no-context
7554 * version of the main function, (which may itself be aliased to us).
7555 * Don't access this version directly.
7559 Perl_sv_setpvf_mg_nocontext(SV *sv, const char* pat, ...)
7563 va_start(args, pat);
7564 sv_vsetpvf_mg(sv, pat, &args);
7570 =for apidoc sv_setpvf
7572 Processes its arguments like C<sprintf> and sets an SV to the formatted
7573 output. Does not handle 'set' magic. See C<sv_setpvf_mg>.
7579 Perl_sv_setpvf(pTHX_ SV *sv, const char* pat, ...)
7582 va_start(args, pat);
7583 sv_vsetpvf(sv, pat, &args);
7587 /* backend for C<sv_setpvf> and C<sv_setpvf_nocontext> */
7590 Perl_sv_vsetpvf(pTHX_ SV *sv, const char* pat, va_list* args)
7592 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
7596 =for apidoc sv_setpvf_mg
7598 Like C<sv_setpvf>, but also handles 'set' magic.
7604 Perl_sv_setpvf_mg(pTHX_ SV *sv, const char* pat, ...)
7607 va_start(args, pat);
7608 sv_vsetpvf_mg(sv, pat, &args);
7612 /* backend for C<sv_setpvf_mg> C<setpvf_mg_nocontext> */
7615 Perl_sv_vsetpvf_mg(pTHX_ SV *sv, const char* pat, va_list* args)
7617 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
7621 #if defined(PERL_IMPLICIT_CONTEXT)
7623 /* pTHX_ magic can't cope with varargs, so this is a no-context
7624 * version of the main function, (which may itself be aliased to us).
7625 * Don't access this version directly.
7629 Perl_sv_catpvf_nocontext(SV *sv, const char* pat, ...)
7633 va_start(args, pat);
7634 sv_vcatpvf(sv, pat, &args);
7638 /* pTHX_ magic can't cope with varargs, so this is a no-context
7639 * version of the main function, (which may itself be aliased to us).
7640 * Don't access this version directly.
7644 Perl_sv_catpvf_mg_nocontext(SV *sv, const char* pat, ...)
7648 va_start(args, pat);
7649 sv_vcatpvf_mg(sv, pat, &args);
7655 =for apidoc sv_catpvf
7657 Processes its arguments like C<sprintf> and appends the formatted
7658 output to an SV. If the appended data contains "wide" characters
7659 (including, but not limited to, SVs with a UTF-8 PV formatted with %s,
7660 and characters >255 formatted with %c), the original SV might get
7661 upgraded to UTF-8. Handles 'get' magic, but not 'set' magic.
7662 C<SvSETMAGIC()> must typically be called after calling this function
7663 to handle 'set' magic.
7668 Perl_sv_catpvf(pTHX_ SV *sv, const char* pat, ...)
7671 va_start(args, pat);
7672 sv_vcatpvf(sv, pat, &args);
7676 /* backend for C<sv_catpvf> and C<catpvf_mg_nocontext> */
7679 Perl_sv_vcatpvf(pTHX_ SV *sv, const char* pat, va_list* args)
7681 sv_vcatpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
7685 =for apidoc sv_catpvf_mg
7687 Like C<sv_catpvf>, but also handles 'set' magic.
7693 Perl_sv_catpvf_mg(pTHX_ SV *sv, const char* pat, ...)
7696 va_start(args, pat);
7697 sv_vcatpvf_mg(sv, pat, &args);
7701 /* backend for C<catpvf_mg> and C<catpvf_mg_nocontext> */
7704 Perl_sv_vcatpvf_mg(pTHX_ SV *sv, const char* pat, va_list* args)
7706 sv_vcatpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
7711 =for apidoc sv_vsetpvfn
7713 Works like C<vcatpvfn> but copies the text into the SV instead of
7716 Usually used via one of its frontends C<sv_setpvf> and C<sv_setpvf_mg>.
7722 Perl_sv_vsetpvfn(pTHX_ SV *sv, const char *pat, STRLEN patlen, va_list *args, SV **svargs, I32 svmax, bool *maybe_tainted)
7724 sv_setpvn(sv, "", 0);
7725 sv_vcatpvfn(sv, pat, patlen, args, svargs, svmax, maybe_tainted);
7728 /* private function for use in sv_vcatpvfn via the EXPECT_NUMBER macro */
7731 S_expect_number(pTHX_ char** pattern)
7734 switch (**pattern) {
7735 case '1': case '2': case '3':
7736 case '4': case '5': case '6':
7737 case '7': case '8': case '9':
7738 while (isDIGIT(**pattern))
7739 var = var * 10 + (*(*pattern)++ - '0');
7743 #define EXPECT_NUMBER(pattern, var) (var = S_expect_number(aTHX_ &pattern))
7746 =for apidoc sv_vcatpvfn
7748 Processes its arguments like C<vsprintf> and appends the formatted output
7749 to an SV. Uses an array of SVs if the C style variable argument list is
7750 missing (NULL). When running with taint checks enabled, indicates via
7751 C<maybe_tainted> if results are untrustworthy (often due to the use of
7754 Usually used via one of its frontends C<sv_catpvf> and C<sv_catpvf_mg>.
7760 Perl_sv_vcatpvfn(pTHX_ SV *sv, const char *pat, STRLEN patlen, va_list *args, SV **svargs, I32 svmax, bool *maybe_tainted)
7767 static char nullstr[] = "(null)";
7769 bool has_utf8 = FALSE; /* has the result utf8? */
7771 /* no matter what, this is a string now */
7772 (void)SvPV_force(sv, origlen);
7774 /* special-case "", "%s", and "%_" */
7777 if (patlen == 2 && pat[0] == '%') {
7781 char *s = va_arg(*args, char*);
7782 sv_catpv(sv, s ? s : nullstr);
7784 else if (svix < svmax) {
7785 sv_catsv(sv, *svargs);
7786 if (DO_UTF8(*svargs))
7792 argsv = va_arg(*args, SV*);
7793 sv_catsv(sv, argsv);
7798 /* See comment on '_' below */
7803 if (!args && svix < svmax && DO_UTF8(*svargs))
7806 patend = (char*)pat + patlen;
7807 for (p = (char*)pat; p < patend; p = q) {
7810 bool vectorize = FALSE;
7811 bool vectorarg = FALSE;
7812 bool vec_utf8 = FALSE;
7818 bool has_precis = FALSE;
7820 bool is_utf8 = FALSE; /* is this item utf8? */
7823 U8 utf8buf[UTF8_MAXLEN+1];
7824 STRLEN esignlen = 0;
7826 char *eptr = Nullch;
7828 /* Times 4: a decimal digit takes more than 3 binary digits.
7829 * NV_DIG: mantissa takes than many decimal digits.
7830 * Plus 32: Playing safe. */
7831 char ebuf[IV_DIG * 4 + NV_DIG + 32];
7832 /* large enough for "%#.#f" --chip */
7833 /* what about long double NVs? --jhi */
7836 U8 *vecstr = Null(U8*);
7848 STRLEN dotstrlen = 1;
7849 I32 efix = 0; /* explicit format parameter index */
7850 I32 ewix = 0; /* explicit width index */
7851 I32 epix = 0; /* explicit precision index */
7852 I32 evix = 0; /* explicit vector index */
7853 bool asterisk = FALSE;
7855 /* echo everything up to the next format specification */
7856 for (q = p; q < patend && *q != '%'; ++q) ;
7858 sv_catpvn(sv, p, q - p);
7865 We allow format specification elements in this order:
7866 \d+\$ explicit format parameter index
7868 \*?(\d+\$)?v vector with optional (optionally specified) arg
7869 \d+|\*(\d+\$)? width using optional (optionally specified) arg
7870 \.(\d*|\*(\d+\$)?) precision using optional (optionally specified) arg
7872 [%bcdefginopsux_DFOUX] format (mandatory)
7874 if (EXPECT_NUMBER(q, width)) {
7915 if (EXPECT_NUMBER(q, ewix))
7924 if ((vectorarg = asterisk)) {
7934 EXPECT_NUMBER(q, width);
7939 vecsv = va_arg(*args, SV*);
7941 vecsv = (evix ? evix <= svmax : svix < svmax) ?
7942 svargs[ewix ? ewix-1 : svix++] : &PL_sv_undef;
7943 dotstr = SvPVx(vecsv, dotstrlen);
7948 vecsv = va_arg(*args, SV*);
7949 vecstr = (U8*)SvPVx(vecsv,veclen);
7950 vec_utf8 = DO_UTF8(vecsv);
7952 else if (efix ? efix <= svmax : svix < svmax) {
7953 vecsv = svargs[efix ? efix-1 : svix++];
7954 vecstr = (U8*)SvPVx(vecsv,veclen);
7955 vec_utf8 = DO_UTF8(vecsv);
7965 i = va_arg(*args, int);
7967 i = (ewix ? ewix <= svmax : svix < svmax) ?
7968 SvIVx(svargs[ewix ? ewix-1 : svix++]) : 0;
7970 width = (i < 0) ? -i : i;
7980 if (EXPECT_NUMBER(q, epix) && *q++ != '$') /* epix currently unused */
7983 i = va_arg(*args, int);
7985 i = (ewix ? ewix <= svmax : svix < svmax)
7986 ? SvIVx(svargs[ewix ? ewix-1 : svix++]) : 0;
7987 precis = (i < 0) ? 0 : i;
7992 precis = precis * 10 + (*q++ - '0');
8000 #if defined(HAS_QUAD) || (defined(HAS_LONG_DOUBLE) && defined(USE_LONG_DOUBLE))
8011 #if defined(HAS_QUAD) || (defined(HAS_LONG_DOUBLE) && defined(USE_LONG_DOUBLE))
8012 if (*(q + 1) == 'l') { /* lld, llf */
8035 argsv = (efix ? efix <= svmax : svix < svmax) ?
8036 svargs[efix ? efix-1 : svix++] : &PL_sv_undef;
8043 uv = args ? va_arg(*args, int) : SvIVx(argsv);
8045 (!UNI_IS_INVARIANT(uv) && SvUTF8(sv)))
8047 eptr = (char*)utf8buf;
8048 elen = uvchr_to_utf8((U8*)eptr, uv) - utf8buf;
8060 eptr = va_arg(*args, char*);
8062 #ifdef MACOS_TRADITIONAL
8063 /* On MacOS, %#s format is used for Pascal strings */
8068 elen = strlen(eptr);
8071 elen = sizeof nullstr - 1;
8075 eptr = SvPVx(argsv, elen);
8076 if (DO_UTF8(argsv)) {
8077 if (has_precis && precis < elen) {
8079 sv_pos_u2b(argsv, &p, 0); /* sticks at end */
8082 if (width) { /* fudge width (can't fudge elen) */
8083 width += elen - sv_len_utf8(argsv);
8092 * The "%_" hack might have to be changed someday,
8093 * if ISO or ANSI decide to use '_' for something.
8094 * So we keep it hidden from users' code.
8098 argsv = va_arg(*args, SV*);
8099 eptr = SvPVx(argsv, elen);
8105 if (has_precis && elen > precis)
8114 uv = PTR2UV(args ? va_arg(*args, void*) : argsv);
8132 uv = utf8n_to_uvchr(vecstr, veclen, &ulen,
8141 esignbuf[esignlen++] = plus;
8145 case 'h': iv = (short)va_arg(*args, int); break;
8146 default: iv = va_arg(*args, int); break;
8147 case 'l': iv = va_arg(*args, long); break;
8148 case 'V': iv = va_arg(*args, IV); break;
8150 case 'q': iv = va_arg(*args, Quad_t); break;
8157 case 'h': iv = (short)iv; break;
8159 case 'l': iv = (long)iv; break;
8162 case 'q': iv = (Quad_t)iv; break;
8166 if ( !vectorize ) /* we already set uv above */
8171 esignbuf[esignlen++] = plus;
8175 esignbuf[esignlen++] = '-';
8218 uv = utf8n_to_uvchr(vecstr, veclen, &ulen,
8229 case 'h': uv = (unsigned short)va_arg(*args, unsigned); break;
8230 default: uv = va_arg(*args, unsigned); break;
8231 case 'l': uv = va_arg(*args, unsigned long); break;
8232 case 'V': uv = va_arg(*args, UV); break;
8234 case 'q': uv = va_arg(*args, Quad_t); break;
8241 case 'h': uv = (unsigned short)uv; break;
8243 case 'l': uv = (unsigned long)uv; break;
8246 case 'q': uv = (Quad_t)uv; break;
8252 eptr = ebuf + sizeof ebuf;
8258 p = (char*)((c == 'X')
8259 ? "0123456789ABCDEF" : "0123456789abcdef");
8265 esignbuf[esignlen++] = '0';
8266 esignbuf[esignlen++] = c; /* 'x' or 'X' */
8272 *--eptr = '0' + dig;
8274 if (alt && *eptr != '0')
8280 *--eptr = '0' + dig;
8283 esignbuf[esignlen++] = '0';
8284 esignbuf[esignlen++] = 'b';
8287 default: /* it had better be ten or less */
8288 #if defined(PERL_Y2KWARN)
8289 if (ckWARN(WARN_Y2K)) {
8291 char *s = SvPV(sv,n);
8292 if (n >= 2 && s[n-2] == '1' && s[n-1] == '9'
8293 && (n == 2 || !isDIGIT(s[n-3])))
8295 Perl_warner(aTHX_ packWARN(WARN_Y2K),
8296 "Possible Y2K bug: %%%c %s",
8297 c, "format string following '19'");
8303 *--eptr = '0' + dig;
8304 } while (uv /= base);
8307 elen = (ebuf + sizeof ebuf) - eptr;
8310 zeros = precis - elen;
8311 else if (precis == 0 && elen == 1 && *eptr == '0')
8316 /* FLOATING POINT */
8319 c = 'f'; /* maybe %F isn't supported here */
8325 /* This is evil, but floating point is even more evil */
8328 nv = args ? va_arg(*args, NV) : SvNVx(argsv);
8331 if (c != 'e' && c != 'E') {
8333 (void)Perl_frexp(nv, &i);
8334 if (i == PERL_INT_MIN)
8335 Perl_die(aTHX_ "panic: frexp");
8337 need = BIT_DIGITS(i);
8339 need += has_precis ? precis : 6; /* known default */
8343 need += 20; /* fudge factor */
8344 if (PL_efloatsize < need) {
8345 Safefree(PL_efloatbuf);
8346 PL_efloatsize = need + 20; /* more fudge */
8347 New(906, PL_efloatbuf, PL_efloatsize, char);
8348 PL_efloatbuf[0] = '\0';
8351 eptr = ebuf + sizeof ebuf;
8354 #if defined(USE_LONG_DOUBLE) && defined(PERL_PRIfldbl)
8356 /* Copy the one or more characters in a long double
8357 * format before the 'base' ([efgEFG]) character to
8358 * the format string. */
8359 static char const prifldbl[] = PERL_PRIfldbl;
8360 char const *p = prifldbl + sizeof(prifldbl) - 3;
8361 while (p >= prifldbl) { *--eptr = *p--; }
8366 do { *--eptr = '0' + (base % 10); } while (base /= 10);
8371 do { *--eptr = '0' + (base % 10); } while (base /= 10);
8383 /* No taint. Otherwise we are in the strange situation
8384 * where printf() taints but print($float) doesn't.
8386 (void)sprintf(PL_efloatbuf, eptr, nv);
8388 eptr = PL_efloatbuf;
8389 elen = strlen(PL_efloatbuf);
8396 i = SvCUR(sv) - origlen;
8399 case 'h': *(va_arg(*args, short*)) = i; break;
8400 default: *(va_arg(*args, int*)) = i; break;
8401 case 'l': *(va_arg(*args, long*)) = i; break;
8402 case 'V': *(va_arg(*args, IV*)) = i; break;
8404 case 'q': *(va_arg(*args, Quad_t*)) = i; break;
8409 sv_setuv_mg(argsv, (UV)i);
8410 continue; /* not "break" */
8417 if (!args && ckWARN(WARN_PRINTF) &&
8418 (PL_op->op_type == OP_PRTF || PL_op->op_type == OP_SPRINTF)) {
8419 SV *msg = sv_newmortal();
8420 Perl_sv_setpvf(aTHX_ msg, "Invalid conversion in %s: ",
8421 (PL_op->op_type == OP_PRTF) ? "printf" : "sprintf");
8424 Perl_sv_catpvf(aTHX_ msg,
8425 "\"%%%c\"", c & 0xFF);
8427 Perl_sv_catpvf(aTHX_ msg,
8428 "\"%%\\%03"UVof"\"",
8431 sv_catpv(msg, "end of string");
8432 Perl_warner(aTHX_ packWARN(WARN_PRINTF), "%"SVf, msg); /* yes, this is reentrant */
8435 /* output mangled stuff ... */
8441 /* ... right here, because formatting flags should not apply */
8442 SvGROW(sv, SvCUR(sv) + elen + 1);
8444 Copy(eptr, p, elen, char);
8447 SvCUR(sv) = p - SvPVX(sv);
8448 continue; /* not "break" */
8451 if (is_utf8 != has_utf8) {
8454 sv_utf8_upgrade(sv);
8457 SV *nsv = sv_2mortal(newSVpvn(eptr, elen));
8458 sv_utf8_upgrade(nsv);
8462 SvGROW(sv, SvCUR(sv) + elen + 1);
8467 have = esignlen + zeros + elen;
8468 need = (have > width ? have : width);
8471 SvGROW(sv, SvCUR(sv) + need + dotstrlen + 1);
8473 if (esignlen && fill == '0') {
8474 for (i = 0; i < esignlen; i++)
8478 memset(p, fill, gap);
8481 if (esignlen && fill != '0') {
8482 for (i = 0; i < esignlen; i++)
8486 for (i = zeros; i; i--)
8490 Copy(eptr, p, elen, char);
8494 memset(p, ' ', gap);
8499 Copy(dotstr, p, dotstrlen, char);
8503 vectorize = FALSE; /* done iterating over vecstr */
8510 SvCUR(sv) = p - SvPVX(sv);
8518 /* =========================================================================
8520 =head1 Cloning an interpreter
8522 All the macros and functions in this section are for the private use of
8523 the main function, perl_clone().
8525 The foo_dup() functions make an exact copy of an existing foo thinngy.
8526 During the course of a cloning, a hash table is used to map old addresses
8527 to new addresses. The table is created and manipulated with the
8528 ptr_table_* functions.
8532 ============================================================================*/
8535 #if defined(USE_ITHREADS)
8537 #if defined(USE_5005THREADS)
8538 # include "error: USE_5005THREADS and USE_ITHREADS are incompatible"
8541 #ifndef GpREFCNT_inc
8542 # define GpREFCNT_inc(gp) ((gp) ? (++(gp)->gp_refcnt, (gp)) : (GP*)NULL)
8546 #define sv_dup_inc(s,t) SvREFCNT_inc(sv_dup(s,t))
8547 #define av_dup(s,t) (AV*)sv_dup((SV*)s,t)
8548 #define av_dup_inc(s,t) (AV*)SvREFCNT_inc(sv_dup((SV*)s,t))
8549 #define hv_dup(s,t) (HV*)sv_dup((SV*)s,t)
8550 #define hv_dup_inc(s,t) (HV*)SvREFCNT_inc(sv_dup((SV*)s,t))
8551 #define cv_dup(s,t) (CV*)sv_dup((SV*)s,t)
8552 #define cv_dup_inc(s,t) (CV*)SvREFCNT_inc(sv_dup((SV*)s,t))
8553 #define io_dup(s,t) (IO*)sv_dup((SV*)s,t)
8554 #define io_dup_inc(s,t) (IO*)SvREFCNT_inc(sv_dup((SV*)s,t))
8555 #define gv_dup(s,t) (GV*)sv_dup((SV*)s,t)
8556 #define gv_dup_inc(s,t) (GV*)SvREFCNT_inc(sv_dup((SV*)s,t))
8557 #define SAVEPV(p) (p ? savepv(p) : Nullch)
8558 #define SAVEPVN(p,n) (p ? savepvn(p,n) : Nullch)
8561 /* Duplicate a regexp. Required reading: pregcomp() and pregfree() in
8562 regcomp.c. AMS 20010712 */
8565 Perl_re_dup(pTHX_ REGEXP *r, CLONE_PARAMS *param)
8569 struct reg_substr_datum *s;
8572 return (REGEXP *)NULL;
8574 if ((ret = (REGEXP *)ptr_table_fetch(PL_ptr_table, r)))
8577 len = r->offsets[0];
8578 npar = r->nparens+1;
8580 Newc(0, ret, sizeof(regexp) + (len+1)*sizeof(regnode), char, regexp);
8581 Copy(r->program, ret->program, len+1, regnode);
8583 New(0, ret->startp, npar, I32);
8584 Copy(r->startp, ret->startp, npar, I32);
8585 New(0, ret->endp, npar, I32);
8586 Copy(r->startp, ret->startp, npar, I32);
8588 New(0, ret->substrs, 1, struct reg_substr_data);
8589 for (s = ret->substrs->data, i = 0; i < 3; i++, s++) {
8590 s->min_offset = r->substrs->data[i].min_offset;
8591 s->max_offset = r->substrs->data[i].max_offset;
8592 s->substr = sv_dup_inc(r->substrs->data[i].substr, param);
8595 ret->regstclass = NULL;
8598 int count = r->data->count;
8600 Newc(0, d, sizeof(struct reg_data) + count*sizeof(void *),
8601 char, struct reg_data);
8602 New(0, d->what, count, U8);
8605 for (i = 0; i < count; i++) {
8606 d->what[i] = r->data->what[i];
8607 switch (d->what[i]) {
8609 d->data[i] = sv_dup_inc((SV *)r->data->data[i], param);
8612 d->data[i] = av_dup_inc((AV *)r->data->data[i], param);
8615 /* This is cheating. */
8616 New(0, d->data[i], 1, struct regnode_charclass_class);
8617 StructCopy(r->data->data[i], d->data[i],
8618 struct regnode_charclass_class);
8619 ret->regstclass = (regnode*)d->data[i];
8622 /* Compiled op trees are readonly, and can thus be
8623 shared without duplication. */
8624 d->data[i] = (void*)OpREFCNT_inc((OP*)r->data->data[i]);
8627 d->data[i] = r->data->data[i];
8637 New(0, ret->offsets, 2*len+1, U32);
8638 Copy(r->offsets, ret->offsets, 2*len+1, U32);
8640 ret->precomp = SAVEPV(r->precomp);
8641 ret->refcnt = r->refcnt;
8642 ret->minlen = r->minlen;
8643 ret->prelen = r->prelen;
8644 ret->nparens = r->nparens;
8645 ret->lastparen = r->lastparen;
8646 ret->lastcloseparen = r->lastcloseparen;
8647 ret->reganch = r->reganch;
8649 ret->sublen = r->sublen;
8651 if (RX_MATCH_COPIED(ret))
8652 ret->subbeg = SAVEPV(r->subbeg);
8654 ret->subbeg = Nullch;
8656 ptr_table_store(PL_ptr_table, r, ret);
8660 /* duplicate a file handle */
8663 Perl_fp_dup(pTHX_ PerlIO *fp, char type, CLONE_PARAMS *param)
8667 return (PerlIO*)NULL;
8669 /* look for it in the table first */
8670 ret = (PerlIO*)ptr_table_fetch(PL_ptr_table, fp);
8674 /* create anew and remember what it is */
8675 ret = PerlIO_fdupopen(aTHX_ fp, param, PERLIO_DUP_CLONE);
8676 ptr_table_store(PL_ptr_table, fp, ret);
8680 /* duplicate a directory handle */
8683 Perl_dirp_dup(pTHX_ DIR *dp)
8691 /* duplicate a typeglob */
8694 Perl_gp_dup(pTHX_ GP *gp, CLONE_PARAMS* param)
8699 /* look for it in the table first */
8700 ret = (GP*)ptr_table_fetch(PL_ptr_table, gp);
8704 /* create anew and remember what it is */
8705 Newz(0, ret, 1, GP);
8706 ptr_table_store(PL_ptr_table, gp, ret);
8709 ret->gp_refcnt = 0; /* must be before any other dups! */
8710 ret->gp_sv = sv_dup_inc(gp->gp_sv, param);
8711 ret->gp_io = io_dup_inc(gp->gp_io, param);
8712 ret->gp_form = cv_dup_inc(gp->gp_form, param);
8713 ret->gp_av = av_dup_inc(gp->gp_av, param);
8714 ret->gp_hv = hv_dup_inc(gp->gp_hv, param);
8715 ret->gp_egv = gv_dup(gp->gp_egv, param);/* GvEGV is not refcounted */
8716 ret->gp_cv = cv_dup_inc(gp->gp_cv, param);
8717 ret->gp_cvgen = gp->gp_cvgen;
8718 ret->gp_flags = gp->gp_flags;
8719 ret->gp_line = gp->gp_line;
8720 ret->gp_file = gp->gp_file; /* points to COP.cop_file */
8724 /* duplicate a chain of magic */
8727 Perl_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS* param)
8729 MAGIC *mgprev = (MAGIC*)NULL;
8732 return (MAGIC*)NULL;
8733 /* look for it in the table first */
8734 mgret = (MAGIC*)ptr_table_fetch(PL_ptr_table, mg);
8738 for (; mg; mg = mg->mg_moremagic) {
8740 Newz(0, nmg, 1, MAGIC);
8742 mgprev->mg_moremagic = nmg;
8745 nmg->mg_virtual = mg->mg_virtual; /* XXX copy dynamic vtable? */
8746 nmg->mg_private = mg->mg_private;
8747 nmg->mg_type = mg->mg_type;
8748 nmg->mg_flags = mg->mg_flags;
8749 if (mg->mg_type == PERL_MAGIC_qr) {
8750 nmg->mg_obj = (SV*)re_dup((REGEXP*)mg->mg_obj, param);
8752 else if(mg->mg_type == PERL_MAGIC_backref) {
8753 AV *av = (AV*) mg->mg_obj;
8756 nmg->mg_obj = (SV*)newAV();
8760 av_push((AV*)nmg->mg_obj,sv_dup(svp[i],param));
8765 nmg->mg_obj = (mg->mg_flags & MGf_REFCOUNTED)
8766 ? sv_dup_inc(mg->mg_obj, param)
8767 : sv_dup(mg->mg_obj, param);
8769 nmg->mg_len = mg->mg_len;
8770 nmg->mg_ptr = mg->mg_ptr; /* XXX random ptr? */
8771 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
8772 if (mg->mg_len > 0) {
8773 nmg->mg_ptr = SAVEPVN(mg->mg_ptr, mg->mg_len);
8774 if (mg->mg_type == PERL_MAGIC_overload_table &&
8775 AMT_AMAGIC((AMT*)mg->mg_ptr))
8777 AMT *amtp = (AMT*)mg->mg_ptr;
8778 AMT *namtp = (AMT*)nmg->mg_ptr;
8780 for (i = 1; i < NofAMmeth; i++) {
8781 namtp->table[i] = cv_dup_inc(amtp->table[i], param);
8785 else if (mg->mg_len == HEf_SVKEY)
8786 nmg->mg_ptr = (char*)sv_dup_inc((SV*)mg->mg_ptr, param);
8788 if ((mg->mg_flags & MGf_DUP) && mg->mg_virtual && mg->mg_virtual->svt_dup) {
8789 CALL_FPTR(nmg->mg_virtual->svt_dup)(aTHX_ nmg, param);
8796 /* create a new pointer-mapping table */
8799 Perl_ptr_table_new(pTHX)
8802 Newz(0, tbl, 1, PTR_TBL_t);
8805 Newz(0, tbl->tbl_ary, tbl->tbl_max + 1, PTR_TBL_ENT_t*);
8809 /* map an existing pointer using a table */
8812 Perl_ptr_table_fetch(pTHX_ PTR_TBL_t *tbl, void *sv)
8814 PTR_TBL_ENT_t *tblent;
8815 UV hash = PTR2UV(sv);
8817 tblent = tbl->tbl_ary[hash & tbl->tbl_max];
8818 for (; tblent; tblent = tblent->next) {
8819 if (tblent->oldval == sv)
8820 return tblent->newval;
8825 /* add a new entry to a pointer-mapping table */
8828 Perl_ptr_table_store(pTHX_ PTR_TBL_t *tbl, void *oldv, void *newv)
8830 PTR_TBL_ENT_t *tblent, **otblent;
8831 /* XXX this may be pessimal on platforms where pointers aren't good
8832 * hash values e.g. if they grow faster in the most significant
8834 UV hash = PTR2UV(oldv);
8838 otblent = &tbl->tbl_ary[hash & tbl->tbl_max];
8839 for (tblent = *otblent; tblent; i=0, tblent = tblent->next) {
8840 if (tblent->oldval == oldv) {
8841 tblent->newval = newv;
8846 Newz(0, tblent, 1, PTR_TBL_ENT_t);
8847 tblent->oldval = oldv;
8848 tblent->newval = newv;
8849 tblent->next = *otblent;
8852 if (i && tbl->tbl_items > tbl->tbl_max)
8853 ptr_table_split(tbl);
8856 /* double the hash bucket size of an existing ptr table */
8859 Perl_ptr_table_split(pTHX_ PTR_TBL_t *tbl)
8861 PTR_TBL_ENT_t **ary = tbl->tbl_ary;
8862 UV oldsize = tbl->tbl_max + 1;
8863 UV newsize = oldsize * 2;
8866 Renew(ary, newsize, PTR_TBL_ENT_t*);
8867 Zero(&ary[oldsize], newsize-oldsize, PTR_TBL_ENT_t*);
8868 tbl->tbl_max = --newsize;
8870 for (i=0; i < oldsize; i++, ary++) {
8871 PTR_TBL_ENT_t **curentp, **entp, *ent;
8874 curentp = ary + oldsize;
8875 for (entp = ary, ent = *ary; ent; ent = *entp) {
8876 if ((newsize & PTR2UV(ent->oldval)) != i) {
8878 ent->next = *curentp;
8888 /* remove all the entries from a ptr table */
8891 Perl_ptr_table_clear(pTHX_ PTR_TBL_t *tbl)
8893 register PTR_TBL_ENT_t **array;
8894 register PTR_TBL_ENT_t *entry;
8895 register PTR_TBL_ENT_t *oentry = Null(PTR_TBL_ENT_t*);
8899 if (!tbl || !tbl->tbl_items) {
8903 array = tbl->tbl_ary;
8910 entry = entry->next;
8914 if (++riter > max) {
8917 entry = array[riter];
8924 /* clear and free a ptr table */
8927 Perl_ptr_table_free(pTHX_ PTR_TBL_t *tbl)
8932 ptr_table_clear(tbl);
8933 Safefree(tbl->tbl_ary);
8941 /* attempt to make everything in the typeglob readonly */
8944 S_gv_share(pTHX_ SV *sstr)
8947 SV *sv = &PL_sv_no; /* just need SvREADONLY-ness */
8949 if (GvIO(gv) || GvFORM(gv)) {
8950 GvUNIQUE_off(gv); /* GvIOs cannot be shared. nor can GvFORMs */
8952 else if (!GvCV(gv)) {
8956 /* CvPADLISTs cannot be shared */
8957 if (!CvXSUB(GvCV(gv))) {
8962 if (!GvUNIQUE(gv)) {
8964 PerlIO_printf(Perl_debug_log, "gv_share: unable to share %s::%s\n",
8965 HvNAME(GvSTASH(gv)), GvNAME(gv));
8971 * write attempts will die with
8972 * "Modification of a read-only value attempted"
8978 SvREADONLY_on(GvSV(gv));
8985 SvREADONLY_on(GvAV(gv));
8992 SvREADONLY_on(GvAV(gv));
8995 return sstr; /* he_dup() will SvREFCNT_inc() */
8998 /* duplicate an SV of any type (including AV, HV etc) */
9001 Perl_rvpv_dup(pTHX_ SV *dstr, SV *sstr, CLONE_PARAMS* param)
9004 SvRV(dstr) = SvWEAKREF(sstr)
9005 ? sv_dup(SvRV(sstr), param)
9006 : sv_dup_inc(SvRV(sstr), param);
9008 else if (SvPVX(sstr)) {
9009 /* Has something there */
9011 /* Normal PV - clone whole allocated space */
9012 SvPVX(dstr) = SAVEPVN(SvPVX(sstr), SvLEN(sstr)-1);
9015 /* Special case - not normally malloced for some reason */
9016 if (SvREADONLY(sstr) && SvFAKE(sstr)) {
9017 /* A "shared" PV - clone it as unshared string */
9019 SvREADONLY_off(dstr);
9020 SvPVX(dstr) = SAVEPVN(SvPVX(sstr), SvCUR(sstr));
9023 /* Some other special case - random pointer */
9024 SvPVX(dstr) = SvPVX(sstr);
9030 SvPVX(dstr) = SvPVX(sstr);
9035 Perl_sv_dup(pTHX_ SV *sstr, CLONE_PARAMS* param)
9039 if (!sstr || SvTYPE(sstr) == SVTYPEMASK)
9041 /* look for it in the table first */
9042 dstr = (SV*)ptr_table_fetch(PL_ptr_table, sstr);
9046 /* create anew and remember what it is */
9048 ptr_table_store(PL_ptr_table, sstr, dstr);
9051 SvFLAGS(dstr) = SvFLAGS(sstr);
9052 SvFLAGS(dstr) &= ~SVf_OOK; /* don't propagate OOK hack */
9053 SvREFCNT(dstr) = 0; /* must be before any other dups! */
9056 if (SvANY(sstr) && PL_watch_pvx && SvPVX(sstr) == PL_watch_pvx)
9057 PerlIO_printf(Perl_debug_log, "watch at %p hit, found string \"%s\"\n",
9058 PL_watch_pvx, SvPVX(sstr));
9061 switch (SvTYPE(sstr)) {
9066 SvANY(dstr) = new_XIV();
9067 SvIVX(dstr) = SvIVX(sstr);
9070 SvANY(dstr) = new_XNV();
9071 SvNVX(dstr) = SvNVX(sstr);
9074 SvANY(dstr) = new_XRV();
9075 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9078 SvANY(dstr) = new_XPV();
9079 SvCUR(dstr) = SvCUR(sstr);
9080 SvLEN(dstr) = SvLEN(sstr);
9081 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9084 SvANY(dstr) = new_XPVIV();
9085 SvCUR(dstr) = SvCUR(sstr);
9086 SvLEN(dstr) = SvLEN(sstr);
9087 SvIVX(dstr) = SvIVX(sstr);
9088 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9091 SvANY(dstr) = new_XPVNV();
9092 SvCUR(dstr) = SvCUR(sstr);
9093 SvLEN(dstr) = SvLEN(sstr);
9094 SvIVX(dstr) = SvIVX(sstr);
9095 SvNVX(dstr) = SvNVX(sstr);
9096 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9099 SvANY(dstr) = new_XPVMG();
9100 SvCUR(dstr) = SvCUR(sstr);
9101 SvLEN(dstr) = SvLEN(sstr);
9102 SvIVX(dstr) = SvIVX(sstr);
9103 SvNVX(dstr) = SvNVX(sstr);
9104 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9105 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9106 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9109 SvANY(dstr) = new_XPVBM();
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 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9117 BmRARE(dstr) = BmRARE(sstr);
9118 BmUSEFUL(dstr) = BmUSEFUL(sstr);
9119 BmPREVIOUS(dstr)= BmPREVIOUS(sstr);
9122 SvANY(dstr) = new_XPVLV();
9123 SvCUR(dstr) = SvCUR(sstr);
9124 SvLEN(dstr) = SvLEN(sstr);
9125 SvIVX(dstr) = SvIVX(sstr);
9126 SvNVX(dstr) = SvNVX(sstr);
9127 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9128 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9129 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9130 LvTARGOFF(dstr) = LvTARGOFF(sstr); /* XXX sometimes holds PMOP* when DEBUGGING */
9131 LvTARGLEN(dstr) = LvTARGLEN(sstr);
9132 LvTARG(dstr) = sv_dup_inc(LvTARG(sstr), param);
9133 LvTYPE(dstr) = LvTYPE(sstr);
9136 if (GvUNIQUE((GV*)sstr)) {
9138 if ((share = gv_share(sstr))) {
9142 PerlIO_printf(Perl_debug_log, "sv_dup: sharing %s::%s\n",
9143 HvNAME(GvSTASH(share)), GvNAME(share));
9148 SvANY(dstr) = new_XPVGV();
9149 SvCUR(dstr) = SvCUR(sstr);
9150 SvLEN(dstr) = SvLEN(sstr);
9151 SvIVX(dstr) = SvIVX(sstr);
9152 SvNVX(dstr) = SvNVX(sstr);
9153 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9154 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9155 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9156 GvNAMELEN(dstr) = GvNAMELEN(sstr);
9157 GvNAME(dstr) = SAVEPVN(GvNAME(sstr), GvNAMELEN(sstr));
9158 GvSTASH(dstr) = hv_dup_inc(GvSTASH(sstr), param);
9159 GvFLAGS(dstr) = GvFLAGS(sstr);
9160 GvGP(dstr) = gp_dup(GvGP(sstr), param);
9161 (void)GpREFCNT_inc(GvGP(dstr));
9164 SvANY(dstr) = new_XPVIO();
9165 SvCUR(dstr) = SvCUR(sstr);
9166 SvLEN(dstr) = SvLEN(sstr);
9167 SvIVX(dstr) = SvIVX(sstr);
9168 SvNVX(dstr) = SvNVX(sstr);
9169 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9170 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9171 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9172 IoIFP(dstr) = fp_dup(IoIFP(sstr), IoTYPE(sstr), param);
9173 if (IoOFP(sstr) == IoIFP(sstr))
9174 IoOFP(dstr) = IoIFP(dstr);
9176 IoOFP(dstr) = fp_dup(IoOFP(sstr), IoTYPE(sstr), param);
9177 /* PL_rsfp_filters entries have fake IoDIRP() */
9178 if (IoDIRP(sstr) && !(IoFLAGS(sstr) & IOf_FAKE_DIRP))
9179 IoDIRP(dstr) = dirp_dup(IoDIRP(sstr));
9181 IoDIRP(dstr) = IoDIRP(sstr);
9182 IoLINES(dstr) = IoLINES(sstr);
9183 IoPAGE(dstr) = IoPAGE(sstr);
9184 IoPAGE_LEN(dstr) = IoPAGE_LEN(sstr);
9185 IoLINES_LEFT(dstr) = IoLINES_LEFT(sstr);
9186 IoTOP_NAME(dstr) = SAVEPV(IoTOP_NAME(sstr));
9187 IoTOP_GV(dstr) = gv_dup(IoTOP_GV(sstr), param);
9188 IoFMT_NAME(dstr) = SAVEPV(IoFMT_NAME(sstr));
9189 IoFMT_GV(dstr) = gv_dup(IoFMT_GV(sstr), param);
9190 IoBOTTOM_NAME(dstr) = SAVEPV(IoBOTTOM_NAME(sstr));
9191 IoBOTTOM_GV(dstr) = gv_dup(IoBOTTOM_GV(sstr), param);
9192 IoSUBPROCESS(dstr) = IoSUBPROCESS(sstr);
9193 IoTYPE(dstr) = IoTYPE(sstr);
9194 IoFLAGS(dstr) = IoFLAGS(sstr);
9197 SvANY(dstr) = new_XPVAV();
9198 SvCUR(dstr) = SvCUR(sstr);
9199 SvLEN(dstr) = SvLEN(sstr);
9200 SvIVX(dstr) = SvIVX(sstr);
9201 SvNVX(dstr) = SvNVX(sstr);
9202 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9203 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9204 AvARYLEN((AV*)dstr) = sv_dup_inc(AvARYLEN((AV*)sstr), param);
9205 AvFLAGS((AV*)dstr) = AvFLAGS((AV*)sstr);
9206 if (AvARRAY((AV*)sstr)) {
9207 SV **dst_ary, **src_ary;
9208 SSize_t items = AvFILLp((AV*)sstr) + 1;
9210 src_ary = AvARRAY((AV*)sstr);
9211 Newz(0, dst_ary, AvMAX((AV*)sstr)+1, SV*);
9212 ptr_table_store(PL_ptr_table, src_ary, dst_ary);
9213 SvPVX(dstr) = (char*)dst_ary;
9214 AvALLOC((AV*)dstr) = dst_ary;
9215 if (AvREAL((AV*)sstr)) {
9217 *dst_ary++ = sv_dup_inc(*src_ary++, param);
9221 *dst_ary++ = sv_dup(*src_ary++, param);
9223 items = AvMAX((AV*)sstr) - AvFILLp((AV*)sstr);
9224 while (items-- > 0) {
9225 *dst_ary++ = &PL_sv_undef;
9229 SvPVX(dstr) = Nullch;
9230 AvALLOC((AV*)dstr) = (SV**)NULL;
9234 SvANY(dstr) = new_XPVHV();
9235 SvCUR(dstr) = SvCUR(sstr);
9236 SvLEN(dstr) = SvLEN(sstr);
9237 SvIVX(dstr) = SvIVX(sstr);
9238 SvNVX(dstr) = SvNVX(sstr);
9239 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9240 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9241 HvRITER((HV*)dstr) = HvRITER((HV*)sstr);
9242 if (HvARRAY((HV*)sstr)) {
9244 XPVHV *dxhv = (XPVHV*)SvANY(dstr);
9245 XPVHV *sxhv = (XPVHV*)SvANY(sstr);
9246 Newz(0, dxhv->xhv_array,
9247 PERL_HV_ARRAY_ALLOC_BYTES(dxhv->xhv_max+1), char);
9248 while (i <= sxhv->xhv_max) {
9249 ((HE**)dxhv->xhv_array)[i] = he_dup(((HE**)sxhv->xhv_array)[i],
9250 !!HvSHAREKEYS(sstr), param);
9253 dxhv->xhv_eiter = he_dup(sxhv->xhv_eiter, !!HvSHAREKEYS(sstr), param);
9256 SvPVX(dstr) = Nullch;
9257 HvEITER((HV*)dstr) = (HE*)NULL;
9259 HvPMROOT((HV*)dstr) = HvPMROOT((HV*)sstr); /* XXX */
9260 HvNAME((HV*)dstr) = SAVEPV(HvNAME((HV*)sstr));
9261 /* Record stashes for possible cloning in Perl_clone(). */
9262 if(HvNAME((HV*)dstr))
9263 av_push(param->stashes, dstr);
9266 SvANY(dstr) = new_XPVFM();
9267 FmLINES(dstr) = FmLINES(sstr);
9271 SvANY(dstr) = new_XPVCV();
9273 SvCUR(dstr) = SvCUR(sstr);
9274 SvLEN(dstr) = SvLEN(sstr);
9275 SvIVX(dstr) = SvIVX(sstr);
9276 SvNVX(dstr) = SvNVX(sstr);
9277 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9278 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9279 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9280 CvSTASH(dstr) = hv_dup(CvSTASH(sstr), param); /* NOTE: not refcounted */
9281 CvSTART(dstr) = CvSTART(sstr);
9282 CvROOT(dstr) = OpREFCNT_inc(CvROOT(sstr));
9283 CvXSUB(dstr) = CvXSUB(sstr);
9284 CvXSUBANY(dstr) = CvXSUBANY(sstr);
9285 if (CvCONST(sstr)) {
9286 CvXSUBANY(dstr).any_ptr = GvUNIQUE(CvGV(sstr)) ?
9287 SvREFCNT_inc(CvXSUBANY(sstr).any_ptr) :
9288 sv_dup_inc(CvXSUBANY(sstr).any_ptr, param);
9290 CvGV(dstr) = gv_dup(CvGV(sstr), param);
9291 if (param->flags & CLONEf_COPY_STACKS) {
9292 CvDEPTH(dstr) = CvDEPTH(sstr);
9296 if (CvPADLIST(sstr) && !AvREAL(CvPADLIST(sstr))) {
9297 /* XXX padlists are real, but pretend to be not */
9298 AvREAL_on(CvPADLIST(sstr));
9299 CvPADLIST(dstr) = av_dup_inc(CvPADLIST(sstr), param);
9300 AvREAL_off(CvPADLIST(sstr));
9301 AvREAL_off(CvPADLIST(dstr));
9304 CvPADLIST(dstr) = av_dup_inc(CvPADLIST(sstr), param);
9305 if (!CvANON(sstr) || CvCLONED(sstr))
9306 CvOUTSIDE(dstr) = cv_dup_inc(CvOUTSIDE(sstr), param);
9308 CvOUTSIDE(dstr) = cv_dup(CvOUTSIDE(sstr), param);
9309 CvFLAGS(dstr) = CvFLAGS(sstr);
9310 CvFILE(dstr) = CvXSUB(sstr) ? CvFILE(sstr) : SAVEPV(CvFILE(sstr));
9313 Perl_croak(aTHX_ "Bizarre SvTYPE [%d]", SvTYPE(sstr));
9317 if (SvOBJECT(dstr) && SvTYPE(dstr) != SVt_PVIO)
9323 /* duplicate a context */
9326 Perl_cx_dup(pTHX_ PERL_CONTEXT *cxs, I32 ix, I32 max, CLONE_PARAMS* param)
9331 return (PERL_CONTEXT*)NULL;
9333 /* look for it in the table first */
9334 ncxs = (PERL_CONTEXT*)ptr_table_fetch(PL_ptr_table, cxs);
9338 /* create anew and remember what it is */
9339 Newz(56, ncxs, max + 1, PERL_CONTEXT);
9340 ptr_table_store(PL_ptr_table, cxs, ncxs);
9343 PERL_CONTEXT *cx = &cxs[ix];
9344 PERL_CONTEXT *ncx = &ncxs[ix];
9345 ncx->cx_type = cx->cx_type;
9346 if (CxTYPE(cx) == CXt_SUBST) {
9347 Perl_croak(aTHX_ "Cloning substitution context is unimplemented");
9350 ncx->blk_oldsp = cx->blk_oldsp;
9351 ncx->blk_oldcop = cx->blk_oldcop;
9352 ncx->blk_oldretsp = cx->blk_oldretsp;
9353 ncx->blk_oldmarksp = cx->blk_oldmarksp;
9354 ncx->blk_oldscopesp = cx->blk_oldscopesp;
9355 ncx->blk_oldpm = cx->blk_oldpm;
9356 ncx->blk_gimme = cx->blk_gimme;
9357 switch (CxTYPE(cx)) {
9359 ncx->blk_sub.cv = (cx->blk_sub.olddepth == 0
9360 ? cv_dup_inc(cx->blk_sub.cv, param)
9361 : cv_dup(cx->blk_sub.cv,param));
9362 ncx->blk_sub.argarray = (cx->blk_sub.hasargs
9363 ? av_dup_inc(cx->blk_sub.argarray, param)
9365 ncx->blk_sub.savearray = av_dup_inc(cx->blk_sub.savearray, param);
9366 ncx->blk_sub.olddepth = cx->blk_sub.olddepth;
9367 ncx->blk_sub.hasargs = cx->blk_sub.hasargs;
9368 ncx->blk_sub.lval = cx->blk_sub.lval;
9371 ncx->blk_eval.old_in_eval = cx->blk_eval.old_in_eval;
9372 ncx->blk_eval.old_op_type = cx->blk_eval.old_op_type;
9373 ncx->blk_eval.old_namesv = sv_dup_inc(cx->blk_eval.old_namesv, param);;
9374 ncx->blk_eval.old_eval_root = cx->blk_eval.old_eval_root;
9375 ncx->blk_eval.cur_text = sv_dup(cx->blk_eval.cur_text, param);
9378 ncx->blk_loop.label = cx->blk_loop.label;
9379 ncx->blk_loop.resetsp = cx->blk_loop.resetsp;
9380 ncx->blk_loop.redo_op = cx->blk_loop.redo_op;
9381 ncx->blk_loop.next_op = cx->blk_loop.next_op;
9382 ncx->blk_loop.last_op = cx->blk_loop.last_op;
9383 ncx->blk_loop.iterdata = (CxPADLOOP(cx)
9384 ? cx->blk_loop.iterdata
9385 : gv_dup((GV*)cx->blk_loop.iterdata, param));
9386 ncx->blk_loop.oldcurpad
9387 = (SV**)ptr_table_fetch(PL_ptr_table,
9388 cx->blk_loop.oldcurpad);
9389 ncx->blk_loop.itersave = sv_dup_inc(cx->blk_loop.itersave, param);
9390 ncx->blk_loop.iterlval = sv_dup_inc(cx->blk_loop.iterlval, param);
9391 ncx->blk_loop.iterary = av_dup_inc(cx->blk_loop.iterary, param);
9392 ncx->blk_loop.iterix = cx->blk_loop.iterix;
9393 ncx->blk_loop.itermax = cx->blk_loop.itermax;
9396 ncx->blk_sub.cv = cv_dup(cx->blk_sub.cv, param);
9397 ncx->blk_sub.gv = gv_dup(cx->blk_sub.gv, param);
9398 ncx->blk_sub.dfoutgv = gv_dup_inc(cx->blk_sub.dfoutgv, param);
9399 ncx->blk_sub.hasargs = cx->blk_sub.hasargs;
9411 /* duplicate a stack info structure */
9414 Perl_si_dup(pTHX_ PERL_SI *si, CLONE_PARAMS* param)
9419 return (PERL_SI*)NULL;
9421 /* look for it in the table first */
9422 nsi = (PERL_SI*)ptr_table_fetch(PL_ptr_table, si);
9426 /* create anew and remember what it is */
9427 Newz(56, nsi, 1, PERL_SI);
9428 ptr_table_store(PL_ptr_table, si, nsi);
9430 nsi->si_stack = av_dup_inc(si->si_stack, param);
9431 nsi->si_cxix = si->si_cxix;
9432 nsi->si_cxmax = si->si_cxmax;
9433 nsi->si_cxstack = cx_dup(si->si_cxstack, si->si_cxix, si->si_cxmax, param);
9434 nsi->si_type = si->si_type;
9435 nsi->si_prev = si_dup(si->si_prev, param);
9436 nsi->si_next = si_dup(si->si_next, param);
9437 nsi->si_markoff = si->si_markoff;
9442 #define POPINT(ss,ix) ((ss)[--(ix)].any_i32)
9443 #define TOPINT(ss,ix) ((ss)[ix].any_i32)
9444 #define POPLONG(ss,ix) ((ss)[--(ix)].any_long)
9445 #define TOPLONG(ss,ix) ((ss)[ix].any_long)
9446 #define POPIV(ss,ix) ((ss)[--(ix)].any_iv)
9447 #define TOPIV(ss,ix) ((ss)[ix].any_iv)
9448 #define POPPTR(ss,ix) ((ss)[--(ix)].any_ptr)
9449 #define TOPPTR(ss,ix) ((ss)[ix].any_ptr)
9450 #define POPDPTR(ss,ix) ((ss)[--(ix)].any_dptr)
9451 #define TOPDPTR(ss,ix) ((ss)[ix].any_dptr)
9452 #define POPDXPTR(ss,ix) ((ss)[--(ix)].any_dxptr)
9453 #define TOPDXPTR(ss,ix) ((ss)[ix].any_dxptr)
9456 #define pv_dup_inc(p) SAVEPV(p)
9457 #define pv_dup(p) SAVEPV(p)
9458 #define svp_dup_inc(p,pp) any_dup(p,pp)
9460 /* map any object to the new equivent - either something in the
9461 * ptr table, or something in the interpreter structure
9465 Perl_any_dup(pTHX_ void *v, PerlInterpreter *proto_perl)
9472 /* look for it in the table first */
9473 ret = ptr_table_fetch(PL_ptr_table, v);
9477 /* see if it is part of the interpreter structure */
9478 if (v >= (void*)proto_perl && v < (void*)(proto_perl+1))
9479 ret = (void*)(((char*)aTHX) + (((char*)v) - (char*)proto_perl));
9487 /* duplicate the save stack */
9490 Perl_ss_dup(pTHX_ PerlInterpreter *proto_perl, CLONE_PARAMS* param)
9492 ANY *ss = proto_perl->Tsavestack;
9493 I32 ix = proto_perl->Tsavestack_ix;
9494 I32 max = proto_perl->Tsavestack_max;
9507 void (*dptr) (void*);
9508 void (*dxptr) (pTHX_ void*);
9511 Newz(54, nss, max, ANY);
9517 case SAVEt_ITEM: /* normal string */
9518 sv = (SV*)POPPTR(ss,ix);
9519 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9520 sv = (SV*)POPPTR(ss,ix);
9521 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9523 case SAVEt_SV: /* scalar reference */
9524 sv = (SV*)POPPTR(ss,ix);
9525 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9526 gv = (GV*)POPPTR(ss,ix);
9527 TOPPTR(nss,ix) = gv_dup_inc(gv, param);
9529 case SAVEt_GENERIC_PVREF: /* generic char* */
9530 c = (char*)POPPTR(ss,ix);
9531 TOPPTR(nss,ix) = pv_dup(c);
9532 ptr = POPPTR(ss,ix);
9533 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9535 case SAVEt_SHARED_PVREF: /* char* in shared space */
9536 c = (char*)POPPTR(ss,ix);
9537 TOPPTR(nss,ix) = savesharedpv(c);
9538 ptr = POPPTR(ss,ix);
9539 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9541 case SAVEt_GENERIC_SVREF: /* generic sv */
9542 case SAVEt_SVREF: /* scalar reference */
9543 sv = (SV*)POPPTR(ss,ix);
9544 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9545 ptr = POPPTR(ss,ix);
9546 TOPPTR(nss,ix) = svp_dup_inc((SV**)ptr, proto_perl);/* XXXXX */
9548 case SAVEt_AV: /* array reference */
9549 av = (AV*)POPPTR(ss,ix);
9550 TOPPTR(nss,ix) = av_dup_inc(av, param);
9551 gv = (GV*)POPPTR(ss,ix);
9552 TOPPTR(nss,ix) = gv_dup(gv, param);
9554 case SAVEt_HV: /* hash reference */
9555 hv = (HV*)POPPTR(ss,ix);
9556 TOPPTR(nss,ix) = hv_dup_inc(hv, param);
9557 gv = (GV*)POPPTR(ss,ix);
9558 TOPPTR(nss,ix) = gv_dup(gv, param);
9560 case SAVEt_INT: /* int reference */
9561 ptr = POPPTR(ss,ix);
9562 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9563 intval = (int)POPINT(ss,ix);
9564 TOPINT(nss,ix) = intval;
9566 case SAVEt_LONG: /* long reference */
9567 ptr = POPPTR(ss,ix);
9568 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9569 longval = (long)POPLONG(ss,ix);
9570 TOPLONG(nss,ix) = longval;
9572 case SAVEt_I32: /* I32 reference */
9573 case SAVEt_I16: /* I16 reference */
9574 case SAVEt_I8: /* I8 reference */
9575 ptr = POPPTR(ss,ix);
9576 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9580 case SAVEt_IV: /* IV reference */
9581 ptr = POPPTR(ss,ix);
9582 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9586 case SAVEt_SPTR: /* SV* reference */
9587 ptr = POPPTR(ss,ix);
9588 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9589 sv = (SV*)POPPTR(ss,ix);
9590 TOPPTR(nss,ix) = sv_dup(sv, param);
9592 case SAVEt_VPTR: /* random* reference */
9593 ptr = POPPTR(ss,ix);
9594 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9595 ptr = POPPTR(ss,ix);
9596 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9598 case SAVEt_PPTR: /* char* reference */
9599 ptr = POPPTR(ss,ix);
9600 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9601 c = (char*)POPPTR(ss,ix);
9602 TOPPTR(nss,ix) = pv_dup(c);
9604 case SAVEt_HPTR: /* HV* reference */
9605 ptr = POPPTR(ss,ix);
9606 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9607 hv = (HV*)POPPTR(ss,ix);
9608 TOPPTR(nss,ix) = hv_dup(hv, param);
9610 case SAVEt_APTR: /* AV* reference */
9611 ptr = POPPTR(ss,ix);
9612 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9613 av = (AV*)POPPTR(ss,ix);
9614 TOPPTR(nss,ix) = av_dup(av, param);
9617 gv = (GV*)POPPTR(ss,ix);
9618 TOPPTR(nss,ix) = gv_dup(gv, param);
9620 case SAVEt_GP: /* scalar reference */
9621 gp = (GP*)POPPTR(ss,ix);
9622 TOPPTR(nss,ix) = gp = gp_dup(gp, param);
9623 (void)GpREFCNT_inc(gp);
9624 gv = (GV*)POPPTR(ss,ix);
9625 TOPPTR(nss,ix) = gv_dup_inc(gv, param);
9626 c = (char*)POPPTR(ss,ix);
9627 TOPPTR(nss,ix) = pv_dup(c);
9634 case SAVEt_MORTALIZESV:
9635 sv = (SV*)POPPTR(ss,ix);
9636 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9639 ptr = POPPTR(ss,ix);
9640 if (ptr && (((OP*)ptr)->op_private & OPpREFCOUNTED)) {
9641 /* these are assumed to be refcounted properly */
9642 switch (((OP*)ptr)->op_type) {
9649 TOPPTR(nss,ix) = ptr;
9654 TOPPTR(nss,ix) = Nullop;
9659 TOPPTR(nss,ix) = Nullop;
9662 c = (char*)POPPTR(ss,ix);
9663 TOPPTR(nss,ix) = pv_dup_inc(c);
9666 longval = POPLONG(ss,ix);
9667 TOPLONG(nss,ix) = longval;
9670 hv = (HV*)POPPTR(ss,ix);
9671 TOPPTR(nss,ix) = hv_dup_inc(hv, param);
9672 c = (char*)POPPTR(ss,ix);
9673 TOPPTR(nss,ix) = pv_dup_inc(c);
9677 case SAVEt_DESTRUCTOR:
9678 ptr = POPPTR(ss,ix);
9679 TOPPTR(nss,ix) = any_dup(ptr, proto_perl); /* XXX quite arbitrary */
9680 dptr = POPDPTR(ss,ix);
9681 TOPDPTR(nss,ix) = (void (*)(void*))any_dup((void *)dptr, proto_perl);
9683 case SAVEt_DESTRUCTOR_X:
9684 ptr = POPPTR(ss,ix);
9685 TOPPTR(nss,ix) = any_dup(ptr, proto_perl); /* XXX quite arbitrary */
9686 dxptr = POPDXPTR(ss,ix);
9687 TOPDXPTR(nss,ix) = (void (*)(pTHX_ void*))any_dup((void *)dxptr, proto_perl);
9689 case SAVEt_REGCONTEXT:
9695 case SAVEt_STACK_POS: /* Position on Perl stack */
9699 case SAVEt_AELEM: /* array element */
9700 sv = (SV*)POPPTR(ss,ix);
9701 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9704 av = (AV*)POPPTR(ss,ix);
9705 TOPPTR(nss,ix) = av_dup_inc(av, param);
9707 case SAVEt_HELEM: /* hash element */
9708 sv = (SV*)POPPTR(ss,ix);
9709 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9710 sv = (SV*)POPPTR(ss,ix);
9711 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9712 hv = (HV*)POPPTR(ss,ix);
9713 TOPPTR(nss,ix) = hv_dup_inc(hv, param);
9716 ptr = POPPTR(ss,ix);
9717 TOPPTR(nss,ix) = ptr;
9724 av = (AV*)POPPTR(ss,ix);
9725 TOPPTR(nss,ix) = av_dup(av, param);
9728 longval = (long)POPLONG(ss,ix);
9729 TOPLONG(nss,ix) = longval;
9730 ptr = POPPTR(ss,ix);
9731 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9732 sv = (SV*)POPPTR(ss,ix);
9733 TOPPTR(nss,ix) = sv_dup(sv, param);
9736 Perl_croak(aTHX_ "panic: ss_dup inconsistency");
9744 =for apidoc perl_clone
9746 Create and return a new interpreter by cloning the current one.
9751 /* XXX the above needs expanding by someone who actually understands it ! */
9752 EXTERN_C PerlInterpreter *
9753 perl_clone_host(PerlInterpreter* proto_perl, UV flags);
9756 perl_clone(PerlInterpreter *proto_perl, UV flags)
9758 #ifdef PERL_IMPLICIT_SYS
9760 /* perlhost.h so we need to call into it
9761 to clone the host, CPerlHost should have a c interface, sky */
9763 if (flags & CLONEf_CLONE_HOST) {
9764 return perl_clone_host(proto_perl,flags);
9766 return perl_clone_using(proto_perl, flags,
9768 proto_perl->IMemShared,
9769 proto_perl->IMemParse,
9779 perl_clone_using(PerlInterpreter *proto_perl, UV flags,
9780 struct IPerlMem* ipM, struct IPerlMem* ipMS,
9781 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
9782 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
9783 struct IPerlDir* ipD, struct IPerlSock* ipS,
9784 struct IPerlProc* ipP)
9786 /* XXX many of the string copies here can be optimized if they're
9787 * constants; they need to be allocated as common memory and just
9788 * their pointers copied. */
9791 CLONE_PARAMS clone_params;
9792 CLONE_PARAMS* param = &clone_params;
9794 PerlInterpreter *my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
9795 PERL_SET_THX(my_perl);
9798 memset(my_perl, 0xab, sizeof(PerlInterpreter));
9804 Zero(&PL_debug_pad, 1, struct perl_debug_pad);
9805 # else /* !DEBUGGING */
9806 Zero(my_perl, 1, PerlInterpreter);
9807 # endif /* DEBUGGING */
9811 PL_MemShared = ipMS;
9819 #else /* !PERL_IMPLICIT_SYS */
9821 CLONE_PARAMS clone_params;
9822 CLONE_PARAMS* param = &clone_params;
9823 PerlInterpreter *my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
9824 PERL_SET_THX(my_perl);
9829 memset(my_perl, 0xab, sizeof(PerlInterpreter));
9835 Zero(&PL_debug_pad, 1, struct perl_debug_pad);
9836 # else /* !DEBUGGING */
9837 Zero(my_perl, 1, PerlInterpreter);
9838 # endif /* DEBUGGING */
9839 #endif /* PERL_IMPLICIT_SYS */
9840 param->flags = flags;
9843 PL_xiv_arenaroot = NULL;
9845 PL_xnv_arenaroot = NULL;
9847 PL_xrv_arenaroot = NULL;
9849 PL_xpv_arenaroot = NULL;
9851 PL_xpviv_arenaroot = NULL;
9852 PL_xpviv_root = NULL;
9853 PL_xpvnv_arenaroot = NULL;
9854 PL_xpvnv_root = NULL;
9855 PL_xpvcv_arenaroot = NULL;
9856 PL_xpvcv_root = NULL;
9857 PL_xpvav_arenaroot = NULL;
9858 PL_xpvav_root = NULL;
9859 PL_xpvhv_arenaroot = NULL;
9860 PL_xpvhv_root = NULL;
9861 PL_xpvmg_arenaroot = NULL;
9862 PL_xpvmg_root = NULL;
9863 PL_xpvlv_arenaroot = NULL;
9864 PL_xpvlv_root = NULL;
9865 PL_xpvbm_arenaroot = NULL;
9866 PL_xpvbm_root = NULL;
9867 PL_he_arenaroot = NULL;
9869 PL_nice_chunk = NULL;
9870 PL_nice_chunk_size = 0;
9873 PL_sv_root = Nullsv;
9874 PL_sv_arenaroot = Nullsv;
9876 PL_debug = proto_perl->Idebug;
9878 #ifdef USE_REENTRANT_API
9879 Perl_reentrant_init(aTHX);
9882 /* create SV map for pointer relocation */
9883 PL_ptr_table = ptr_table_new();
9885 /* initialize these special pointers as early as possible */
9886 SvANY(&PL_sv_undef) = NULL;
9887 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
9888 SvFLAGS(&PL_sv_undef) = SVf_READONLY|SVt_NULL;
9889 ptr_table_store(PL_ptr_table, &proto_perl->Isv_undef, &PL_sv_undef);
9891 SvANY(&PL_sv_no) = new_XPVNV();
9892 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
9893 SvFLAGS(&PL_sv_no) = SVp_NOK|SVf_NOK|SVp_POK|SVf_POK|SVf_READONLY|SVt_PVNV;
9894 SvPVX(&PL_sv_no) = SAVEPVN(PL_No, 0);
9895 SvCUR(&PL_sv_no) = 0;
9896 SvLEN(&PL_sv_no) = 1;
9897 SvNVX(&PL_sv_no) = 0;
9898 ptr_table_store(PL_ptr_table, &proto_perl->Isv_no, &PL_sv_no);
9900 SvANY(&PL_sv_yes) = new_XPVNV();
9901 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
9902 SvFLAGS(&PL_sv_yes) = SVp_NOK|SVf_NOK|SVp_POK|SVf_POK|SVf_READONLY|SVt_PVNV;
9903 SvPVX(&PL_sv_yes) = SAVEPVN(PL_Yes, 1);
9904 SvCUR(&PL_sv_yes) = 1;
9905 SvLEN(&PL_sv_yes) = 2;
9906 SvNVX(&PL_sv_yes) = 1;
9907 ptr_table_store(PL_ptr_table, &proto_perl->Isv_yes, &PL_sv_yes);
9909 /* create (a non-shared!) shared string table */
9910 PL_strtab = newHV();
9911 HvSHAREKEYS_off(PL_strtab);
9912 hv_ksplit(PL_strtab, 512);
9913 ptr_table_store(PL_ptr_table, proto_perl->Istrtab, PL_strtab);
9915 PL_compiling = proto_perl->Icompiling;
9917 /* These two PVs will be free'd special way so must set them same way op.c does */
9918 PL_compiling.cop_stashpv = savesharedpv(PL_compiling.cop_stashpv);
9919 ptr_table_store(PL_ptr_table, proto_perl->Icompiling.cop_stashpv, PL_compiling.cop_stashpv);
9921 PL_compiling.cop_file = savesharedpv(PL_compiling.cop_file);
9922 ptr_table_store(PL_ptr_table, proto_perl->Icompiling.cop_file, PL_compiling.cop_file);
9924 ptr_table_store(PL_ptr_table, &proto_perl->Icompiling, &PL_compiling);
9925 if (!specialWARN(PL_compiling.cop_warnings))
9926 PL_compiling.cop_warnings = sv_dup_inc(PL_compiling.cop_warnings, param);
9927 if (!specialCopIO(PL_compiling.cop_io))
9928 PL_compiling.cop_io = sv_dup_inc(PL_compiling.cop_io, param);
9929 PL_curcop = (COP*)any_dup(proto_perl->Tcurcop, proto_perl);
9931 /* pseudo environmental stuff */
9932 PL_origargc = proto_perl->Iorigargc;
9934 New(0, PL_origargv, i+1, char*);
9935 PL_origargv[i] = '\0';
9937 PL_origargv[i] = SAVEPV(proto_perl->Iorigargv[i]);
9940 param->stashes = newAV(); /* Setup array of objects to call clone on */
9942 #ifdef PERLIO_LAYERS
9943 /* Clone PerlIO tables as soon as we can handle general xx_dup() */
9944 PerlIO_clone(aTHX_ proto_perl, param);
9947 PL_envgv = gv_dup(proto_perl->Ienvgv, param);
9948 PL_incgv = gv_dup(proto_perl->Iincgv, param);
9949 PL_hintgv = gv_dup(proto_perl->Ihintgv, param);
9950 PL_origfilename = SAVEPV(proto_perl->Iorigfilename);
9951 PL_diehook = sv_dup_inc(proto_perl->Idiehook, param);
9952 PL_warnhook = sv_dup_inc(proto_perl->Iwarnhook, param);
9955 PL_minus_c = proto_perl->Iminus_c;
9956 PL_patchlevel = sv_dup_inc(proto_perl->Ipatchlevel, param);
9957 PL_localpatches = proto_perl->Ilocalpatches;
9958 PL_splitstr = proto_perl->Isplitstr;
9959 PL_preprocess = proto_perl->Ipreprocess;
9960 PL_minus_n = proto_perl->Iminus_n;
9961 PL_minus_p = proto_perl->Iminus_p;
9962 PL_minus_l = proto_perl->Iminus_l;
9963 PL_minus_a = proto_perl->Iminus_a;
9964 PL_minus_F = proto_perl->Iminus_F;
9965 PL_doswitches = proto_perl->Idoswitches;
9966 PL_dowarn = proto_perl->Idowarn;
9967 PL_doextract = proto_perl->Idoextract;
9968 PL_sawampersand = proto_perl->Isawampersand;
9969 PL_unsafe = proto_perl->Iunsafe;
9970 PL_inplace = SAVEPV(proto_perl->Iinplace);
9971 PL_e_script = sv_dup_inc(proto_perl->Ie_script, param);
9972 PL_perldb = proto_perl->Iperldb;
9973 PL_perl_destruct_level = proto_perl->Iperl_destruct_level;
9974 PL_exit_flags = proto_perl->Iexit_flags;
9976 /* magical thingies */
9977 /* XXX time(&PL_basetime) when asked for? */
9978 PL_basetime = proto_perl->Ibasetime;
9979 PL_formfeed = sv_dup(proto_perl->Iformfeed, param);
9981 PL_maxsysfd = proto_perl->Imaxsysfd;
9982 PL_multiline = proto_perl->Imultiline;
9983 PL_statusvalue = proto_perl->Istatusvalue;
9985 PL_statusvalue_vms = proto_perl->Istatusvalue_vms;
9987 PL_encoding = sv_dup(proto_perl->Iencoding, param);
9989 /* Clone the regex array */
9990 PL_regex_padav = newAV();
9992 I32 len = av_len((AV*)proto_perl->Iregex_padav);
9993 SV** regexen = AvARRAY((AV*)proto_perl->Iregex_padav);
9994 av_push(PL_regex_padav,
9995 sv_dup_inc(regexen[0],param));
9996 for(i = 1; i <= len; i++) {
9997 if(SvREPADTMP(regexen[i])) {
9998 av_push(PL_regex_padav, sv_dup_inc(regexen[i], param));
10000 av_push(PL_regex_padav,
10002 newSViv(PTR2IV(re_dup(INT2PTR(REGEXP *,
10003 SvIVX(regexen[i])), param)))
10008 PL_regex_pad = AvARRAY(PL_regex_padav);
10010 /* shortcuts to various I/O objects */
10011 PL_stdingv = gv_dup(proto_perl->Istdingv, param);
10012 PL_stderrgv = gv_dup(proto_perl->Istderrgv, param);
10013 PL_defgv = gv_dup(proto_perl->Idefgv, param);
10014 PL_argvgv = gv_dup(proto_perl->Iargvgv, param);
10015 PL_argvoutgv = gv_dup(proto_perl->Iargvoutgv, param);
10016 PL_argvout_stack = av_dup_inc(proto_perl->Iargvout_stack, param);
10018 /* shortcuts to regexp stuff */
10019 PL_replgv = gv_dup(proto_perl->Ireplgv, param);
10021 /* shortcuts to misc objects */
10022 PL_errgv = gv_dup(proto_perl->Ierrgv, param);
10024 /* shortcuts to debugging objects */
10025 PL_DBgv = gv_dup(proto_perl->IDBgv, param);
10026 PL_DBline = gv_dup(proto_perl->IDBline, param);
10027 PL_DBsub = gv_dup(proto_perl->IDBsub, param);
10028 PL_DBsingle = sv_dup(proto_perl->IDBsingle, param);
10029 PL_DBtrace = sv_dup(proto_perl->IDBtrace, param);
10030 PL_DBsignal = sv_dup(proto_perl->IDBsignal, param);
10031 PL_lineary = av_dup(proto_perl->Ilineary, param);
10032 PL_dbargs = av_dup(proto_perl->Idbargs, param);
10034 /* symbol tables */
10035 PL_defstash = hv_dup_inc(proto_perl->Tdefstash, param);
10036 PL_curstash = hv_dup(proto_perl->Tcurstash, param);
10037 PL_nullstash = hv_dup(proto_perl->Inullstash, param);
10038 PL_debstash = hv_dup(proto_perl->Idebstash, param);
10039 PL_globalstash = hv_dup(proto_perl->Iglobalstash, param);
10040 PL_curstname = sv_dup_inc(proto_perl->Icurstname, param);
10042 PL_beginav = av_dup_inc(proto_perl->Ibeginav, param);
10043 PL_beginav_save = av_dup_inc(proto_perl->Ibeginav_save, param);
10044 PL_endav = av_dup_inc(proto_perl->Iendav, param);
10045 PL_checkav = av_dup_inc(proto_perl->Icheckav, param);
10046 PL_initav = av_dup_inc(proto_perl->Iinitav, param);
10048 PL_sub_generation = proto_perl->Isub_generation;
10050 /* funky return mechanisms */
10051 PL_forkprocess = proto_perl->Iforkprocess;
10053 /* subprocess state */
10054 PL_fdpid = av_dup_inc(proto_perl->Ifdpid, param);
10056 /* internal state */
10057 PL_tainting = proto_perl->Itainting;
10058 PL_maxo = proto_perl->Imaxo;
10059 if (proto_perl->Iop_mask)
10060 PL_op_mask = SAVEPVN(proto_perl->Iop_mask, PL_maxo);
10062 PL_op_mask = Nullch;
10064 /* current interpreter roots */
10065 PL_main_cv = cv_dup_inc(proto_perl->Imain_cv, param);
10066 PL_main_root = OpREFCNT_inc(proto_perl->Imain_root);
10067 PL_main_start = proto_perl->Imain_start;
10068 PL_eval_root = proto_perl->Ieval_root;
10069 PL_eval_start = proto_perl->Ieval_start;
10071 /* runtime control stuff */
10072 PL_curcopdb = (COP*)any_dup(proto_perl->Icurcopdb, proto_perl);
10073 PL_copline = proto_perl->Icopline;
10075 PL_filemode = proto_perl->Ifilemode;
10076 PL_lastfd = proto_perl->Ilastfd;
10077 PL_oldname = proto_perl->Ioldname; /* XXX not quite right */
10080 PL_gensym = proto_perl->Igensym;
10081 PL_preambled = proto_perl->Ipreambled;
10082 PL_preambleav = av_dup_inc(proto_perl->Ipreambleav, param);
10083 PL_laststatval = proto_perl->Ilaststatval;
10084 PL_laststype = proto_perl->Ilaststype;
10085 PL_mess_sv = Nullsv;
10087 PL_ors_sv = sv_dup_inc(proto_perl->Iors_sv, param);
10088 PL_ofmt = SAVEPV(proto_perl->Iofmt);
10090 /* interpreter atexit processing */
10091 PL_exitlistlen = proto_perl->Iexitlistlen;
10092 if (PL_exitlistlen) {
10093 New(0, PL_exitlist, PL_exitlistlen, PerlExitListEntry);
10094 Copy(proto_perl->Iexitlist, PL_exitlist, PL_exitlistlen, PerlExitListEntry);
10097 PL_exitlist = (PerlExitListEntry*)NULL;
10098 PL_modglobal = hv_dup_inc(proto_perl->Imodglobal, param);
10099 PL_custom_op_names = hv_dup_inc(proto_perl->Icustom_op_names,param);
10100 PL_custom_op_descs = hv_dup_inc(proto_perl->Icustom_op_descs,param);
10102 PL_profiledata = NULL;
10103 PL_rsfp = fp_dup(proto_perl->Irsfp, '<', param);
10104 /* PL_rsfp_filters entries have fake IoDIRP() */
10105 PL_rsfp_filters = av_dup_inc(proto_perl->Irsfp_filters, param);
10107 PL_compcv = cv_dup(proto_perl->Icompcv, param);
10108 PL_comppad = av_dup(proto_perl->Icomppad, param);
10109 PL_comppad_name = av_dup(proto_perl->Icomppad_name, param);
10110 PL_comppad_name_fill = proto_perl->Icomppad_name_fill;
10111 PL_comppad_name_floor = proto_perl->Icomppad_name_floor;
10112 PL_curpad = (SV**)ptr_table_fetch(PL_ptr_table,
10113 proto_perl->Tcurpad);
10115 #ifdef HAVE_INTERP_INTERN
10116 sys_intern_dup(&proto_perl->Isys_intern, &PL_sys_intern);
10119 /* more statics moved here */
10120 PL_generation = proto_perl->Igeneration;
10121 PL_DBcv = cv_dup(proto_perl->IDBcv, param);
10123 PL_in_clean_objs = proto_perl->Iin_clean_objs;
10124 PL_in_clean_all = proto_perl->Iin_clean_all;
10126 PL_uid = proto_perl->Iuid;
10127 PL_euid = proto_perl->Ieuid;
10128 PL_gid = proto_perl->Igid;
10129 PL_egid = proto_perl->Iegid;
10130 PL_nomemok = proto_perl->Inomemok;
10131 PL_an = proto_perl->Ian;
10132 PL_cop_seqmax = proto_perl->Icop_seqmax;
10133 PL_op_seqmax = proto_perl->Iop_seqmax;
10134 PL_evalseq = proto_perl->Ievalseq;
10135 PL_origenviron = proto_perl->Iorigenviron; /* XXX not quite right */
10136 PL_origalen = proto_perl->Iorigalen;
10137 PL_pidstatus = newHV(); /* XXX flag for cloning? */
10138 PL_osname = SAVEPV(proto_perl->Iosname);
10139 PL_sh_path = proto_perl->Ish_path; /* XXX never deallocated */
10140 PL_sighandlerp = proto_perl->Isighandlerp;
10143 PL_runops = proto_perl->Irunops;
10145 Copy(proto_perl->Itokenbuf, PL_tokenbuf, 256, char);
10148 PL_cshlen = proto_perl->Icshlen;
10149 PL_cshname = proto_perl->Icshname; /* XXX never deallocated */
10152 PL_lex_state = proto_perl->Ilex_state;
10153 PL_lex_defer = proto_perl->Ilex_defer;
10154 PL_lex_expect = proto_perl->Ilex_expect;
10155 PL_lex_formbrack = proto_perl->Ilex_formbrack;
10156 PL_lex_dojoin = proto_perl->Ilex_dojoin;
10157 PL_lex_starts = proto_perl->Ilex_starts;
10158 PL_lex_stuff = sv_dup_inc(proto_perl->Ilex_stuff, param);
10159 PL_lex_repl = sv_dup_inc(proto_perl->Ilex_repl, param);
10160 PL_lex_op = proto_perl->Ilex_op;
10161 PL_lex_inpat = proto_perl->Ilex_inpat;
10162 PL_lex_inwhat = proto_perl->Ilex_inwhat;
10163 PL_lex_brackets = proto_perl->Ilex_brackets;
10164 i = (PL_lex_brackets < 120 ? 120 : PL_lex_brackets);
10165 PL_lex_brackstack = SAVEPVN(proto_perl->Ilex_brackstack,i);
10166 PL_lex_casemods = proto_perl->Ilex_casemods;
10167 i = (PL_lex_casemods < 12 ? 12 : PL_lex_casemods);
10168 PL_lex_casestack = SAVEPVN(proto_perl->Ilex_casestack,i);
10170 Copy(proto_perl->Inextval, PL_nextval, 5, YYSTYPE);
10171 Copy(proto_perl->Inexttype, PL_nexttype, 5, I32);
10172 PL_nexttoke = proto_perl->Inexttoke;
10174 PL_linestr = sv_dup_inc(proto_perl->Ilinestr, param);
10175 i = proto_perl->Ibufptr - SvPVX(proto_perl->Ilinestr);
10176 PL_bufptr = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10177 i = proto_perl->Ioldbufptr - SvPVX(proto_perl->Ilinestr);
10178 PL_oldbufptr = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10179 i = proto_perl->Ioldoldbufptr - SvPVX(proto_perl->Ilinestr);
10180 PL_oldoldbufptr = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10181 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
10182 i = proto_perl->Ilinestart - SvPVX(proto_perl->Ilinestr);
10183 PL_linestart = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10184 PL_pending_ident = proto_perl->Ipending_ident;
10185 PL_sublex_info = proto_perl->Isublex_info; /* XXX not quite right */
10187 PL_expect = proto_perl->Iexpect;
10189 PL_multi_start = proto_perl->Imulti_start;
10190 PL_multi_end = proto_perl->Imulti_end;
10191 PL_multi_open = proto_perl->Imulti_open;
10192 PL_multi_close = proto_perl->Imulti_close;
10194 PL_error_count = proto_perl->Ierror_count;
10195 PL_subline = proto_perl->Isubline;
10196 PL_subname = sv_dup_inc(proto_perl->Isubname, param);
10198 PL_min_intro_pending = proto_perl->Imin_intro_pending;
10199 PL_max_intro_pending = proto_perl->Imax_intro_pending;
10200 PL_padix = proto_perl->Ipadix;
10201 PL_padix_floor = proto_perl->Ipadix_floor;
10202 PL_pad_reset_pending = proto_perl->Ipad_reset_pending;
10204 i = proto_perl->Ilast_uni - SvPVX(proto_perl->Ilinestr);
10205 PL_last_uni = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10206 i = proto_perl->Ilast_lop - SvPVX(proto_perl->Ilinestr);
10207 PL_last_lop = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10208 PL_last_lop_op = proto_perl->Ilast_lop_op;
10209 PL_in_my = proto_perl->Iin_my;
10210 PL_in_my_stash = hv_dup(proto_perl->Iin_my_stash, param);
10212 PL_cryptseen = proto_perl->Icryptseen;
10215 PL_hints = proto_perl->Ihints;
10217 PL_amagic_generation = proto_perl->Iamagic_generation;
10219 #ifdef USE_LOCALE_COLLATE
10220 PL_collation_ix = proto_perl->Icollation_ix;
10221 PL_collation_name = SAVEPV(proto_perl->Icollation_name);
10222 PL_collation_standard = proto_perl->Icollation_standard;
10223 PL_collxfrm_base = proto_perl->Icollxfrm_base;
10224 PL_collxfrm_mult = proto_perl->Icollxfrm_mult;
10225 #endif /* USE_LOCALE_COLLATE */
10227 #ifdef USE_LOCALE_NUMERIC
10228 PL_numeric_name = SAVEPV(proto_perl->Inumeric_name);
10229 PL_numeric_standard = proto_perl->Inumeric_standard;
10230 PL_numeric_local = proto_perl->Inumeric_local;
10231 PL_numeric_radix_sv = sv_dup_inc(proto_perl->Inumeric_radix_sv, param);
10232 #endif /* !USE_LOCALE_NUMERIC */
10234 /* utf8 character classes */
10235 PL_utf8_alnum = sv_dup_inc(proto_perl->Iutf8_alnum, param);
10236 PL_utf8_alnumc = sv_dup_inc(proto_perl->Iutf8_alnumc, param);
10237 PL_utf8_ascii = sv_dup_inc(proto_perl->Iutf8_ascii, param);
10238 PL_utf8_alpha = sv_dup_inc(proto_perl->Iutf8_alpha, param);
10239 PL_utf8_space = sv_dup_inc(proto_perl->Iutf8_space, param);
10240 PL_utf8_cntrl = sv_dup_inc(proto_perl->Iutf8_cntrl, param);
10241 PL_utf8_graph = sv_dup_inc(proto_perl->Iutf8_graph, param);
10242 PL_utf8_digit = sv_dup_inc(proto_perl->Iutf8_digit, param);
10243 PL_utf8_upper = sv_dup_inc(proto_perl->Iutf8_upper, param);
10244 PL_utf8_lower = sv_dup_inc(proto_perl->Iutf8_lower, param);
10245 PL_utf8_print = sv_dup_inc(proto_perl->Iutf8_print, param);
10246 PL_utf8_punct = sv_dup_inc(proto_perl->Iutf8_punct, param);
10247 PL_utf8_xdigit = sv_dup_inc(proto_perl->Iutf8_xdigit, param);
10248 PL_utf8_mark = sv_dup_inc(proto_perl->Iutf8_mark, param);
10249 PL_utf8_toupper = sv_dup_inc(proto_perl->Iutf8_toupper, param);
10250 PL_utf8_totitle = sv_dup_inc(proto_perl->Iutf8_totitle, param);
10251 PL_utf8_tolower = sv_dup_inc(proto_perl->Iutf8_tolower, param);
10252 PL_utf8_tofold = sv_dup_inc(proto_perl->Iutf8_tofold, param);
10255 PL_last_swash_hv = Nullhv; /* reinits on demand */
10256 PL_last_swash_klen = 0;
10257 PL_last_swash_key[0]= '\0';
10258 PL_last_swash_tmps = (U8*)NULL;
10259 PL_last_swash_slen = 0;
10261 /* perly.c globals */
10262 PL_yydebug = proto_perl->Iyydebug;
10263 PL_yynerrs = proto_perl->Iyynerrs;
10264 PL_yyerrflag = proto_perl->Iyyerrflag;
10265 PL_yychar = proto_perl->Iyychar;
10266 PL_yyval = proto_perl->Iyyval;
10267 PL_yylval = proto_perl->Iyylval;
10269 PL_glob_index = proto_perl->Iglob_index;
10270 PL_srand_called = proto_perl->Isrand_called;
10271 PL_uudmap['M'] = 0; /* reinits on demand */
10272 PL_bitcount = Nullch; /* reinits on demand */
10274 if (proto_perl->Ipsig_pend) {
10275 Newz(0, PL_psig_pend, SIG_SIZE, int);
10278 PL_psig_pend = (int*)NULL;
10281 if (proto_perl->Ipsig_ptr) {
10282 Newz(0, PL_psig_ptr, SIG_SIZE, SV*);
10283 Newz(0, PL_psig_name, SIG_SIZE, SV*);
10284 for (i = 1; i < SIG_SIZE; i++) {
10285 PL_psig_ptr[i] = sv_dup_inc(proto_perl->Ipsig_ptr[i], param);
10286 PL_psig_name[i] = sv_dup_inc(proto_perl->Ipsig_name[i], param);
10290 PL_psig_ptr = (SV**)NULL;
10291 PL_psig_name = (SV**)NULL;
10294 /* thrdvar.h stuff */
10296 if (flags & CLONEf_COPY_STACKS) {
10297 /* next allocation will be PL_tmps_stack[PL_tmps_ix+1] */
10298 PL_tmps_ix = proto_perl->Ttmps_ix;
10299 PL_tmps_max = proto_perl->Ttmps_max;
10300 PL_tmps_floor = proto_perl->Ttmps_floor;
10301 Newz(50, PL_tmps_stack, PL_tmps_max, SV*);
10303 while (i <= PL_tmps_ix) {
10304 PL_tmps_stack[i] = sv_dup_inc(proto_perl->Ttmps_stack[i], param);
10308 /* next PUSHMARK() sets *(PL_markstack_ptr+1) */
10309 i = proto_perl->Tmarkstack_max - proto_perl->Tmarkstack;
10310 Newz(54, PL_markstack, i, I32);
10311 PL_markstack_max = PL_markstack + (proto_perl->Tmarkstack_max
10312 - proto_perl->Tmarkstack);
10313 PL_markstack_ptr = PL_markstack + (proto_perl->Tmarkstack_ptr
10314 - proto_perl->Tmarkstack);
10315 Copy(proto_perl->Tmarkstack, PL_markstack,
10316 PL_markstack_ptr - PL_markstack + 1, I32);
10318 /* next push_scope()/ENTER sets PL_scopestack[PL_scopestack_ix]
10319 * NOTE: unlike the others! */
10320 PL_scopestack_ix = proto_perl->Tscopestack_ix;
10321 PL_scopestack_max = proto_perl->Tscopestack_max;
10322 Newz(54, PL_scopestack, PL_scopestack_max, I32);
10323 Copy(proto_perl->Tscopestack, PL_scopestack, PL_scopestack_ix, I32);
10325 /* next push_return() sets PL_retstack[PL_retstack_ix]
10326 * NOTE: unlike the others! */
10327 PL_retstack_ix = proto_perl->Tretstack_ix;
10328 PL_retstack_max = proto_perl->Tretstack_max;
10329 Newz(54, PL_retstack, PL_retstack_max, OP*);
10330 Copy(proto_perl->Tretstack, PL_retstack, PL_retstack_ix, I32);
10332 /* NOTE: si_dup() looks at PL_markstack */
10333 PL_curstackinfo = si_dup(proto_perl->Tcurstackinfo, param);
10335 /* PL_curstack = PL_curstackinfo->si_stack; */
10336 PL_curstack = av_dup(proto_perl->Tcurstack, param);
10337 PL_mainstack = av_dup(proto_perl->Tmainstack, param);
10339 /* next PUSHs() etc. set *(PL_stack_sp+1) */
10340 PL_stack_base = AvARRAY(PL_curstack);
10341 PL_stack_sp = PL_stack_base + (proto_perl->Tstack_sp
10342 - proto_perl->Tstack_base);
10343 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
10345 /* next SSPUSHFOO() sets PL_savestack[PL_savestack_ix]
10346 * NOTE: unlike the others! */
10347 PL_savestack_ix = proto_perl->Tsavestack_ix;
10348 PL_savestack_max = proto_perl->Tsavestack_max;
10349 /*Newz(54, PL_savestack, PL_savestack_max, ANY);*/
10350 PL_savestack = ss_dup(proto_perl, param);
10354 ENTER; /* perl_destruct() wants to LEAVE; */
10357 PL_start_env = proto_perl->Tstart_env; /* XXXXXX */
10358 PL_top_env = &PL_start_env;
10360 PL_op = proto_perl->Top;
10363 PL_Xpv = (XPV*)NULL;
10364 PL_na = proto_perl->Tna;
10366 PL_statbuf = proto_perl->Tstatbuf;
10367 PL_statcache = proto_perl->Tstatcache;
10368 PL_statgv = gv_dup(proto_perl->Tstatgv, param);
10369 PL_statname = sv_dup_inc(proto_perl->Tstatname, param);
10371 PL_timesbuf = proto_perl->Ttimesbuf;
10374 PL_tainted = proto_perl->Ttainted;
10375 PL_curpm = proto_perl->Tcurpm; /* XXX No PMOP ref count */
10376 PL_rs = sv_dup_inc(proto_perl->Trs, param);
10377 PL_last_in_gv = gv_dup(proto_perl->Tlast_in_gv, param);
10378 PL_ofs_sv = sv_dup_inc(proto_perl->Tofs_sv, param);
10379 PL_defoutgv = gv_dup_inc(proto_perl->Tdefoutgv, param);
10380 PL_chopset = proto_perl->Tchopset; /* XXX never deallocated */
10381 PL_toptarget = sv_dup_inc(proto_perl->Ttoptarget, param);
10382 PL_bodytarget = sv_dup_inc(proto_perl->Tbodytarget, param);
10383 PL_formtarget = sv_dup(proto_perl->Tformtarget, param);
10385 PL_restartop = proto_perl->Trestartop;
10386 PL_in_eval = proto_perl->Tin_eval;
10387 PL_delaymagic = proto_perl->Tdelaymagic;
10388 PL_dirty = proto_perl->Tdirty;
10389 PL_localizing = proto_perl->Tlocalizing;
10391 #ifdef PERL_FLEXIBLE_EXCEPTIONS
10392 PL_protect = proto_perl->Tprotect;
10394 PL_errors = sv_dup_inc(proto_perl->Terrors, param);
10395 PL_av_fetch_sv = Nullsv;
10396 PL_hv_fetch_sv = Nullsv;
10397 Zero(&PL_hv_fetch_ent_mh, 1, HE); /* XXX */
10398 PL_modcount = proto_perl->Tmodcount;
10399 PL_lastgotoprobe = Nullop;
10400 PL_dumpindent = proto_perl->Tdumpindent;
10402 PL_sortcop = (OP*)any_dup(proto_perl->Tsortcop, proto_perl);
10403 PL_sortstash = hv_dup(proto_perl->Tsortstash, param);
10404 PL_firstgv = gv_dup(proto_perl->Tfirstgv, param);
10405 PL_secondgv = gv_dup(proto_perl->Tsecondgv, param);
10406 PL_sortcxix = proto_perl->Tsortcxix;
10407 PL_efloatbuf = Nullch; /* reinits on demand */
10408 PL_efloatsize = 0; /* reinits on demand */
10412 PL_screamfirst = NULL;
10413 PL_screamnext = NULL;
10414 PL_maxscream = -1; /* reinits on demand */
10415 PL_lastscream = Nullsv;
10417 PL_watchaddr = NULL;
10418 PL_watchok = Nullch;
10420 PL_regdummy = proto_perl->Tregdummy;
10421 PL_regcomp_parse = Nullch;
10422 PL_regxend = Nullch;
10423 PL_regcode = (regnode*)NULL;
10426 PL_regprecomp = Nullch;
10431 PL_seen_zerolen = 0;
10433 PL_regcomp_rx = (regexp*)NULL;
10435 PL_colorset = 0; /* reinits PL_colors[] */
10436 /*PL_colors[6] = {0,0,0,0,0,0};*/
10437 PL_reg_whilem_seen = 0;
10438 PL_reginput = Nullch;
10439 PL_regbol = Nullch;
10440 PL_regeol = Nullch;
10441 PL_regstartp = (I32*)NULL;
10442 PL_regendp = (I32*)NULL;
10443 PL_reglastparen = (U32*)NULL;
10444 PL_regtill = Nullch;
10445 PL_reg_start_tmp = (char**)NULL;
10446 PL_reg_start_tmpl = 0;
10447 PL_regdata = (struct reg_data*)NULL;
10450 PL_reg_eval_set = 0;
10452 PL_regprogram = (regnode*)NULL;
10454 PL_regcc = (CURCUR*)NULL;
10455 PL_reg_call_cc = (struct re_cc_state*)NULL;
10456 PL_reg_re = (regexp*)NULL;
10457 PL_reg_ganch = Nullch;
10458 PL_reg_sv = Nullsv;
10459 PL_reg_match_utf8 = FALSE;
10460 PL_reg_magic = (MAGIC*)NULL;
10462 PL_reg_oldcurpm = (PMOP*)NULL;
10463 PL_reg_curpm = (PMOP*)NULL;
10464 PL_reg_oldsaved = Nullch;
10465 PL_reg_oldsavedlen = 0;
10466 PL_reg_maxiter = 0;
10467 PL_reg_leftiter = 0;
10468 PL_reg_poscache = Nullch;
10469 PL_reg_poscache_size= 0;
10471 /* RE engine - function pointers */
10472 PL_regcompp = proto_perl->Tregcompp;
10473 PL_regexecp = proto_perl->Tregexecp;
10474 PL_regint_start = proto_perl->Tregint_start;
10475 PL_regint_string = proto_perl->Tregint_string;
10476 PL_regfree = proto_perl->Tregfree;
10478 PL_reginterp_cnt = 0;
10479 PL_reg_starttry = 0;
10481 /* Pluggable optimizer */
10482 PL_peepp = proto_perl->Tpeepp;
10484 if (!(flags & CLONEf_KEEP_PTR_TABLE)) {
10485 ptr_table_free(PL_ptr_table);
10486 PL_ptr_table = NULL;
10489 /* Call the ->CLONE method, if it exists, for each of the stashes
10490 identified by sv_dup() above.
10492 while(av_len(param->stashes) != -1) {
10493 HV* stash = (HV*) av_shift(param->stashes);
10494 GV* cloner = gv_fetchmethod_autoload(stash, "CLONE", 0);
10495 if (cloner && GvCV(cloner)) {
10500 XPUSHs(sv_2mortal(newSVpv(HvNAME(stash), 0)));
10502 call_sv((SV*)GvCV(cloner), G_DISCARD);
10508 SvREFCNT_dec(param->stashes);
10513 #endif /* USE_ITHREADS */
10516 =head1 Unicode Support
10518 =for apidoc sv_recode_to_utf8
10520 The encoding is assumed to be an Encode object, on entry the PV
10521 of the sv is assumed to be octets in that encoding, and the sv
10522 will be converted into Unicode (and UTF-8).
10524 If the sv already is UTF-8 (or if it is not POK), or if the encoding
10525 is not a reference, nothing is done to the sv. If the encoding is not
10526 an C<Encode::XS> Encoding object, bad things will happen.
10527 (See F<lib/encoding.pm> and L<Encode>).
10529 The PV of the sv is returned.
10534 Perl_sv_recode_to_utf8(pTHX_ SV *sv, SV *encoding)
10536 if (SvPOK(sv) && !DO_UTF8(sv) && SvROK(encoding)) {
10547 XPUSHs(&PL_sv_yes);
10549 call_method("decode", G_SCALAR);
10553 s = SvPV(uni, len);
10554 if (s != SvPVX(sv)) {
10556 Move(s, SvPVX(sv), len, char);
10557 SvCUR_set(sv, len);