3 * Copyright (c) 1991-2002, Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
8 * "I wonder what the Entish is for 'yes' and 'no'," he thought.
11 * This file contains the code that creates, manipulates and destroys
12 * scalar values (SVs). The other types (AV, HV, GV, etc.) reuse the
13 * structure of an SV, so their creation and destruction is handled
14 * here; higher-level functions are in av.c, hv.c, and so on. Opcode
15 * level functions (eg. substr, split, join) for each of the types are
25 #define SV_CHECK_THINKFIRST(sv) if (SvTHINKFIRST(sv)) sv_force_normal(sv)
28 /* ============================================================================
30 =head1 Allocation and deallocation of SVs.
32 An SV (or AV, HV, etc.) is allocated in two parts: the head (struct sv,
33 av, hv...) contains type and reference count information, as well as a
34 pointer to the body (struct xrv, xpv, xpviv...), which contains fields
35 specific to each type.
37 Normally, this allocation is done using arenas, which are approximately
38 1K chunks of memory parcelled up into N heads or bodies. The first slot
39 in each arena is reserved, and is used to hold a link to the next arena.
40 In the case of heads, the unused first slot also contains some flags and
41 a note of the number of slots. Snaked through each arena chain is a
42 linked list of free items; when this becomes empty, an extra arena is
43 allocated and divided up into N items which are threaded into the free
46 The following global variables are associated with arenas:
48 PL_sv_arenaroot pointer to list of SV arenas
49 PL_sv_root pointer to list of free SV structures
51 PL_foo_arenaroot pointer to list of foo arenas,
52 PL_foo_root pointer to list of free foo bodies
53 ... for foo in xiv, xnv, xrv, xpv etc.
55 Note that some of the larger and more rarely used body types (eg xpvio)
56 are not allocated using arenas, but are instead just malloc()/free()ed as
57 required. Also, if PURIFY is defined, arenas are abandoned altogether,
58 with all items individually malloc()ed. In addition, a few SV heads are
59 not allocated from an arena, but are instead directly created as static
60 or auto variables, eg PL_sv_undef.
62 The SV arena serves the secondary purpose of allowing still-live SVs
63 to be located and destroyed during final cleanup.
65 At the lowest level, the macros new_SV() and del_SV() grab and free
66 an SV head. (If debugging with -DD, del_SV() calls the function S_del_sv()
67 to return the SV to the free list with error checking.) new_SV() calls
68 more_sv() / sv_add_arena() to add an extra arena if the free list is empty.
69 SVs in the free list have their SvTYPE field set to all ones.
71 Similarly, there are macros new_XIV()/del_XIV(), new_XNV()/del_XNV() etc
72 that allocate and return individual body types. Normally these are mapped
73 to the arena-manipulating functions new_xiv()/del_xiv() etc, but may be
74 instead mapped directly to malloc()/free() if PURIFY is defined. The
75 new/del functions remove from, or add to, the appropriate PL_foo_root
76 list, and call more_xiv() etc to add a new arena if the list is empty.
78 At the time of very final cleanup, sv_free_arenas() is called from
79 perl_destruct() to physically free all the arenas allocated since the
80 start of the interpreter. Note that this also clears PL_he_arenaroot,
81 which is otherwise dealt with in hv.c.
83 Manipulation of any of the PL_*root pointers is protected by enclosing
84 LOCK_SV_MUTEX; ... UNLOCK_SV_MUTEX calls which should Do the Right Thing
85 if threads are enabled.
87 The function visit() scans the SV arenas list, and calls a specified
88 function for each SV it finds which is still live - ie which has an SvTYPE
89 other than all 1's, and a non-zero SvREFCNT. visit() is used by the
90 following functions (specified as [function that calls visit()] / [function
91 called by visit() for each SV]):
93 sv_report_used() / do_report_used()
94 dump all remaining SVs (debugging aid)
96 sv_clean_objs() / do_clean_objs(),do_clean_named_objs()
97 Attempt to free all objects pointed to by RVs,
98 and, unless DISABLE_DESTRUCTOR_KLUDGE is defined,
99 try to do the same for all objects indirectly
100 referenced by typeglobs too. Called once from
101 perl_destruct(), prior to calling sv_clean_all()
104 sv_clean_all() / do_clean_all()
105 SvREFCNT_dec(sv) each remaining SV, possibly
106 triggering an sv_free(). It also sets the
107 SVf_BREAK flag on the SV to indicate that the
108 refcnt has been artificially lowered, and thus
109 stopping sv_free() from giving spurious warnings
110 about SVs which unexpectedly have a refcnt
111 of zero. called repeatedly from perl_destruct()
112 until there are no SVs left.
116 Private API to rest of sv.c
120 new_XIV(), del_XIV(),
121 new_XNV(), del_XNV(),
126 sv_report_used(), sv_clean_objs(), sv_clean_all(), sv_free_arenas()
131 ============================================================================ */
136 * "A time to plant, and a time to uproot what was planted..."
139 #define plant_SV(p) \
141 SvANY(p) = (void *)PL_sv_root; \
142 SvFLAGS(p) = SVTYPEMASK; \
147 /* sv_mutex must be held while calling uproot_SV() */
148 #define uproot_SV(p) \
151 PL_sv_root = (SV*)SvANY(p); \
156 /* new_SV(): return a new, empty SV head */
172 /* del_SV(): return an empty SV head to the free list */
187 S_del_sv(pTHX_ SV *p)
194 for (sva = PL_sv_arenaroot; sva; sva = (SV *) SvANY(sva)) {
196 svend = &sva[SvREFCNT(sva)];
197 if (p >= sv && p < svend)
201 if (ckWARN_d(WARN_INTERNAL))
202 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
203 "Attempt to free non-arena SV: 0x%"UVxf,
211 #else /* ! DEBUGGING */
213 #define del_SV(p) plant_SV(p)
215 #endif /* DEBUGGING */
219 =head1 SV Manipulation Functions
221 =for apidoc sv_add_arena
223 Given a chunk of memory, link it to the head of the list of arenas,
224 and split it into a list of free SVs.
230 Perl_sv_add_arena(pTHX_ char *ptr, U32 size, U32 flags)
235 Zero(ptr, size, char);
237 /* The first SV in an arena isn't an SV. */
238 SvANY(sva) = (void *) PL_sv_arenaroot; /* ptr to next arena */
239 SvREFCNT(sva) = size / sizeof(SV); /* number of SV slots */
240 SvFLAGS(sva) = flags; /* FAKE if not to be freed */
242 PL_sv_arenaroot = sva;
243 PL_sv_root = sva + 1;
245 svend = &sva[SvREFCNT(sva) - 1];
248 SvANY(sv) = (void *)(SV*)(sv + 1);
249 SvFLAGS(sv) = SVTYPEMASK;
253 SvFLAGS(sv) = SVTYPEMASK;
256 /* make some more SVs by adding another arena */
258 /* sv_mutex must be held while calling more_sv() */
265 sv_add_arena(PL_nice_chunk, PL_nice_chunk_size, 0);
266 PL_nice_chunk = Nullch;
267 PL_nice_chunk_size = 0;
270 char *chunk; /* must use New here to match call to */
271 New(704,chunk,1008,char); /* Safefree() in sv_free_arenas() */
272 sv_add_arena(chunk, 1008, 0);
278 /* visit(): call the named function for each non-free SV in the arenas. */
281 S_visit(pTHX_ SVFUNC_t f)
288 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
289 svend = &sva[SvREFCNT(sva)];
290 for (sv = sva + 1; sv < svend; ++sv) {
291 if (SvTYPE(sv) != SVTYPEMASK && SvREFCNT(sv)) {
302 /* called by sv_report_used() for each live SV */
305 do_report_used(pTHX_ SV *sv)
307 if (SvTYPE(sv) != SVTYPEMASK) {
308 PerlIO_printf(Perl_debug_log, "****\n");
315 =for apidoc sv_report_used
317 Dump the contents of all SVs not yet freed. (Debugging aid).
323 Perl_sv_report_used(pTHX)
326 visit(do_report_used);
330 /* called by sv_clean_objs() for each live SV */
333 do_clean_objs(pTHX_ SV *sv)
337 if (SvROK(sv) && SvOBJECT(rv = SvRV(sv))) {
338 DEBUG_D((PerlIO_printf(Perl_debug_log, "Cleaning object ref:\n "), sv_dump(sv)));
350 /* XXX Might want to check arrays, etc. */
353 /* called by sv_clean_objs() for each live SV */
355 #ifndef DISABLE_DESTRUCTOR_KLUDGE
357 do_clean_named_objs(pTHX_ SV *sv)
359 if (SvTYPE(sv) == SVt_PVGV && GvGP(sv)) {
360 if ( SvOBJECT(GvSV(sv)) ||
361 (GvAV(sv) && SvOBJECT(GvAV(sv))) ||
362 (GvHV(sv) && SvOBJECT(GvHV(sv))) ||
363 (GvIO(sv) && SvOBJECT(GvIO(sv))) ||
364 (GvCV(sv) && SvOBJECT(GvCV(sv))) )
366 DEBUG_D((PerlIO_printf(Perl_debug_log, "Cleaning named glob object:\n "), sv_dump(sv)));
374 =for apidoc sv_clean_objs
376 Attempt to destroy all objects not yet freed
382 Perl_sv_clean_objs(pTHX)
384 PL_in_clean_objs = TRUE;
385 visit(do_clean_objs);
386 #ifndef DISABLE_DESTRUCTOR_KLUDGE
387 /* some barnacles may yet remain, clinging to typeglobs */
388 visit(do_clean_named_objs);
390 PL_in_clean_objs = FALSE;
393 /* called by sv_clean_all() for each live SV */
396 do_clean_all(pTHX_ SV *sv)
398 DEBUG_D((PerlIO_printf(Perl_debug_log, "Cleaning loops: SV at 0x%"UVxf"\n", PTR2UV(sv)) ));
399 SvFLAGS(sv) |= SVf_BREAK;
404 =for apidoc sv_clean_all
406 Decrement the refcnt of each remaining SV, possibly triggering a
407 cleanup. This function may have to be called multiple times to free
408 SVs which are in complex self-referential hierarchies.
414 Perl_sv_clean_all(pTHX)
417 PL_in_clean_all = TRUE;
418 cleaned = visit(do_clean_all);
419 PL_in_clean_all = FALSE;
424 =for apidoc sv_free_arenas
426 Deallocate the memory used by all arenas. Note that all the individual SV
427 heads and bodies within the arenas must already have been freed.
433 Perl_sv_free_arenas(pTHX)
437 XPV *arena, *arenanext;
439 /* Free arenas here, but be careful about fake ones. (We assume
440 contiguity of the fake ones with the corresponding real ones.) */
442 for (sva = PL_sv_arenaroot; sva; sva = svanext) {
443 svanext = (SV*) SvANY(sva);
444 while (svanext && SvFAKE(svanext))
445 svanext = (SV*) SvANY(svanext);
448 Safefree((void *)sva);
451 for (arena = PL_xiv_arenaroot; arena; arena = arenanext) {
452 arenanext = (XPV*)arena->xpv_pv;
455 PL_xiv_arenaroot = 0;
457 for (arena = PL_xnv_arenaroot; arena; arena = arenanext) {
458 arenanext = (XPV*)arena->xpv_pv;
461 PL_xnv_arenaroot = 0;
463 for (arena = PL_xrv_arenaroot; arena; arena = arenanext) {
464 arenanext = (XPV*)arena->xpv_pv;
467 PL_xrv_arenaroot = 0;
469 for (arena = PL_xpv_arenaroot; arena; arena = arenanext) {
470 arenanext = (XPV*)arena->xpv_pv;
473 PL_xpv_arenaroot = 0;
475 for (arena = (XPV*)PL_xpviv_arenaroot; arena; arena = arenanext) {
476 arenanext = (XPV*)arena->xpv_pv;
479 PL_xpviv_arenaroot = 0;
481 for (arena = (XPV*)PL_xpvnv_arenaroot; arena; arena = arenanext) {
482 arenanext = (XPV*)arena->xpv_pv;
485 PL_xpvnv_arenaroot = 0;
487 for (arena = (XPV*)PL_xpvcv_arenaroot; arena; arena = arenanext) {
488 arenanext = (XPV*)arena->xpv_pv;
491 PL_xpvcv_arenaroot = 0;
493 for (arena = (XPV*)PL_xpvav_arenaroot; arena; arena = arenanext) {
494 arenanext = (XPV*)arena->xpv_pv;
497 PL_xpvav_arenaroot = 0;
499 for (arena = (XPV*)PL_xpvhv_arenaroot; arena; arena = arenanext) {
500 arenanext = (XPV*)arena->xpv_pv;
503 PL_xpvhv_arenaroot = 0;
505 for (arena = (XPV*)PL_xpvmg_arenaroot; arena; arena = arenanext) {
506 arenanext = (XPV*)arena->xpv_pv;
509 PL_xpvmg_arenaroot = 0;
511 for (arena = (XPV*)PL_xpvlv_arenaroot; arena; arena = arenanext) {
512 arenanext = (XPV*)arena->xpv_pv;
515 PL_xpvlv_arenaroot = 0;
517 for (arena = (XPV*)PL_xpvbm_arenaroot; arena; arena = arenanext) {
518 arenanext = (XPV*)arena->xpv_pv;
521 PL_xpvbm_arenaroot = 0;
523 for (arena = (XPV*)PL_he_arenaroot; arena; arena = arenanext) {
524 arenanext = (XPV*)arena->xpv_pv;
530 Safefree(PL_nice_chunk);
531 PL_nice_chunk = Nullch;
532 PL_nice_chunk_size = 0;
538 =for apidoc report_uninit
540 Print appropriate "Use of uninitialized variable" warning
546 Perl_report_uninit(pTHX)
549 Perl_warner(aTHX_ packWARN(WARN_UNINITIALIZED), PL_warn_uninit,
550 " in ", OP_DESC(PL_op));
552 Perl_warner(aTHX_ packWARN(WARN_UNINITIALIZED), PL_warn_uninit, "", "");
555 /* grab a new IV body from the free list, allocating more if necessary */
566 * See comment in more_xiv() -- RAM.
568 PL_xiv_root = *(IV**)xiv;
570 return (XPVIV*)((char*)xiv - STRUCT_OFFSET(XPVIV, xiv_iv));
573 /* return an IV body to the free list */
576 S_del_xiv(pTHX_ XPVIV *p)
578 IV* xiv = (IV*)((char*)(p) + STRUCT_OFFSET(XPVIV, xiv_iv));
580 *(IV**)xiv = PL_xiv_root;
585 /* allocate another arena's worth of IV bodies */
593 New(705, ptr, 1008/sizeof(XPV), XPV);
594 ptr->xpv_pv = (char*)PL_xiv_arenaroot; /* linked list of xiv arenas */
595 PL_xiv_arenaroot = ptr; /* to keep Purify happy */
598 xivend = &xiv[1008 / sizeof(IV) - 1];
599 xiv += (sizeof(XPV) - 1) / sizeof(IV) + 1; /* fudge by size of XPV */
601 while (xiv < xivend) {
602 *(IV**)xiv = (IV *)(xiv + 1);
608 /* grab a new NV body from the free list, allocating more if necessary */
618 PL_xnv_root = *(NV**)xnv;
620 return (XPVNV*)((char*)xnv - STRUCT_OFFSET(XPVNV, xnv_nv));
623 /* return an NV body to the free list */
626 S_del_xnv(pTHX_ XPVNV *p)
628 NV* xnv = (NV*)((char*)(p) + STRUCT_OFFSET(XPVNV, xnv_nv));
630 *(NV**)xnv = PL_xnv_root;
635 /* allocate another arena's worth of NV bodies */
643 New(711, ptr, 1008/sizeof(XPV), XPV);
644 ptr->xpv_pv = (char*)PL_xnv_arenaroot;
645 PL_xnv_arenaroot = ptr;
648 xnvend = &xnv[1008 / sizeof(NV) - 1];
649 xnv += (sizeof(XPVIV) - 1) / sizeof(NV) + 1; /* fudge by sizeof XPVIV */
651 while (xnv < xnvend) {
652 *(NV**)xnv = (NV*)(xnv + 1);
658 /* grab a new struct xrv from the free list, allocating more if necessary */
668 PL_xrv_root = (XRV*)xrv->xrv_rv;
673 /* return a struct xrv to the free list */
676 S_del_xrv(pTHX_ XRV *p)
679 p->xrv_rv = (SV*)PL_xrv_root;
684 /* allocate another arena's worth of struct xrv */
690 register XRV* xrvend;
692 New(712, ptr, 1008/sizeof(XPV), XPV);
693 ptr->xpv_pv = (char*)PL_xrv_arenaroot;
694 PL_xrv_arenaroot = ptr;
697 xrvend = &xrv[1008 / sizeof(XRV) - 1];
698 xrv += (sizeof(XPV) - 1) / sizeof(XRV) + 1;
700 while (xrv < xrvend) {
701 xrv->xrv_rv = (SV*)(xrv + 1);
707 /* grab a new struct xpv from the free list, allocating more if necessary */
717 PL_xpv_root = (XPV*)xpv->xpv_pv;
722 /* return a struct xpv to the free list */
725 S_del_xpv(pTHX_ XPV *p)
728 p->xpv_pv = (char*)PL_xpv_root;
733 /* allocate another arena's worth of struct xpv */
739 register XPV* xpvend;
740 New(713, xpv, 1008/sizeof(XPV), XPV);
741 xpv->xpv_pv = (char*)PL_xpv_arenaroot;
742 PL_xpv_arenaroot = xpv;
744 xpvend = &xpv[1008 / sizeof(XPV) - 1];
746 while (xpv < xpvend) {
747 xpv->xpv_pv = (char*)(xpv + 1);
753 /* grab a new struct xpviv from the free list, allocating more if necessary */
762 xpviv = PL_xpviv_root;
763 PL_xpviv_root = (XPVIV*)xpviv->xpv_pv;
768 /* return a struct xpviv to the free list */
771 S_del_xpviv(pTHX_ XPVIV *p)
774 p->xpv_pv = (char*)PL_xpviv_root;
779 /* allocate another arena's worth of struct xpviv */
784 register XPVIV* xpviv;
785 register XPVIV* xpvivend;
786 New(714, xpviv, 1008/sizeof(XPVIV), XPVIV);
787 xpviv->xpv_pv = (char*)PL_xpviv_arenaroot;
788 PL_xpviv_arenaroot = xpviv;
790 xpvivend = &xpviv[1008 / sizeof(XPVIV) - 1];
791 PL_xpviv_root = ++xpviv;
792 while (xpviv < xpvivend) {
793 xpviv->xpv_pv = (char*)(xpviv + 1);
799 /* grab a new struct xpvnv from the free list, allocating more if necessary */
808 xpvnv = PL_xpvnv_root;
809 PL_xpvnv_root = (XPVNV*)xpvnv->xpv_pv;
814 /* return a struct xpvnv to the free list */
817 S_del_xpvnv(pTHX_ XPVNV *p)
820 p->xpv_pv = (char*)PL_xpvnv_root;
825 /* allocate another arena's worth of struct xpvnv */
830 register XPVNV* xpvnv;
831 register XPVNV* xpvnvend;
832 New(715, xpvnv, 1008/sizeof(XPVNV), XPVNV);
833 xpvnv->xpv_pv = (char*)PL_xpvnv_arenaroot;
834 PL_xpvnv_arenaroot = xpvnv;
836 xpvnvend = &xpvnv[1008 / sizeof(XPVNV) - 1];
837 PL_xpvnv_root = ++xpvnv;
838 while (xpvnv < xpvnvend) {
839 xpvnv->xpv_pv = (char*)(xpvnv + 1);
845 /* grab a new struct xpvcv from the free list, allocating more if necessary */
854 xpvcv = PL_xpvcv_root;
855 PL_xpvcv_root = (XPVCV*)xpvcv->xpv_pv;
860 /* return a struct xpvcv to the free list */
863 S_del_xpvcv(pTHX_ XPVCV *p)
866 p->xpv_pv = (char*)PL_xpvcv_root;
871 /* allocate another arena's worth of struct xpvcv */
876 register XPVCV* xpvcv;
877 register XPVCV* xpvcvend;
878 New(716, xpvcv, 1008/sizeof(XPVCV), XPVCV);
879 xpvcv->xpv_pv = (char*)PL_xpvcv_arenaroot;
880 PL_xpvcv_arenaroot = xpvcv;
882 xpvcvend = &xpvcv[1008 / sizeof(XPVCV) - 1];
883 PL_xpvcv_root = ++xpvcv;
884 while (xpvcv < xpvcvend) {
885 xpvcv->xpv_pv = (char*)(xpvcv + 1);
891 /* grab a new struct xpvav from the free list, allocating more if necessary */
900 xpvav = PL_xpvav_root;
901 PL_xpvav_root = (XPVAV*)xpvav->xav_array;
906 /* return a struct xpvav to the free list */
909 S_del_xpvav(pTHX_ XPVAV *p)
912 p->xav_array = (char*)PL_xpvav_root;
917 /* allocate another arena's worth of struct xpvav */
922 register XPVAV* xpvav;
923 register XPVAV* xpvavend;
924 New(717, xpvav, 1008/sizeof(XPVAV), XPVAV);
925 xpvav->xav_array = (char*)PL_xpvav_arenaroot;
926 PL_xpvav_arenaroot = xpvav;
928 xpvavend = &xpvav[1008 / sizeof(XPVAV) - 1];
929 PL_xpvav_root = ++xpvav;
930 while (xpvav < xpvavend) {
931 xpvav->xav_array = (char*)(xpvav + 1);
934 xpvav->xav_array = 0;
937 /* grab a new struct xpvhv from the free list, allocating more if necessary */
946 xpvhv = PL_xpvhv_root;
947 PL_xpvhv_root = (XPVHV*)xpvhv->xhv_array;
952 /* return a struct xpvhv to the free list */
955 S_del_xpvhv(pTHX_ XPVHV *p)
958 p->xhv_array = (char*)PL_xpvhv_root;
963 /* allocate another arena's worth of struct xpvhv */
968 register XPVHV* xpvhv;
969 register XPVHV* xpvhvend;
970 New(718, xpvhv, 1008/sizeof(XPVHV), XPVHV);
971 xpvhv->xhv_array = (char*)PL_xpvhv_arenaroot;
972 PL_xpvhv_arenaroot = xpvhv;
974 xpvhvend = &xpvhv[1008 / sizeof(XPVHV) - 1];
975 PL_xpvhv_root = ++xpvhv;
976 while (xpvhv < xpvhvend) {
977 xpvhv->xhv_array = (char*)(xpvhv + 1);
980 xpvhv->xhv_array = 0;
983 /* grab a new struct xpvmg from the free list, allocating more if necessary */
992 xpvmg = PL_xpvmg_root;
993 PL_xpvmg_root = (XPVMG*)xpvmg->xpv_pv;
998 /* return a struct xpvmg to the free list */
1001 S_del_xpvmg(pTHX_ XPVMG *p)
1004 p->xpv_pv = (char*)PL_xpvmg_root;
1009 /* allocate another arena's worth of struct xpvmg */
1014 register XPVMG* xpvmg;
1015 register XPVMG* xpvmgend;
1016 New(719, xpvmg, 1008/sizeof(XPVMG), XPVMG);
1017 xpvmg->xpv_pv = (char*)PL_xpvmg_arenaroot;
1018 PL_xpvmg_arenaroot = xpvmg;
1020 xpvmgend = &xpvmg[1008 / sizeof(XPVMG) - 1];
1021 PL_xpvmg_root = ++xpvmg;
1022 while (xpvmg < xpvmgend) {
1023 xpvmg->xpv_pv = (char*)(xpvmg + 1);
1029 /* grab a new struct xpvlv from the free list, allocating more if necessary */
1038 xpvlv = PL_xpvlv_root;
1039 PL_xpvlv_root = (XPVLV*)xpvlv->xpv_pv;
1044 /* return a struct xpvlv to the free list */
1047 S_del_xpvlv(pTHX_ XPVLV *p)
1050 p->xpv_pv = (char*)PL_xpvlv_root;
1055 /* allocate another arena's worth of struct xpvlv */
1060 register XPVLV* xpvlv;
1061 register XPVLV* xpvlvend;
1062 New(720, xpvlv, 1008/sizeof(XPVLV), XPVLV);
1063 xpvlv->xpv_pv = (char*)PL_xpvlv_arenaroot;
1064 PL_xpvlv_arenaroot = xpvlv;
1066 xpvlvend = &xpvlv[1008 / sizeof(XPVLV) - 1];
1067 PL_xpvlv_root = ++xpvlv;
1068 while (xpvlv < xpvlvend) {
1069 xpvlv->xpv_pv = (char*)(xpvlv + 1);
1075 /* grab a new struct xpvbm from the free list, allocating more if necessary */
1084 xpvbm = PL_xpvbm_root;
1085 PL_xpvbm_root = (XPVBM*)xpvbm->xpv_pv;
1090 /* return a struct xpvbm to the free list */
1093 S_del_xpvbm(pTHX_ XPVBM *p)
1096 p->xpv_pv = (char*)PL_xpvbm_root;
1101 /* allocate another arena's worth of struct xpvbm */
1106 register XPVBM* xpvbm;
1107 register XPVBM* xpvbmend;
1108 New(721, xpvbm, 1008/sizeof(XPVBM), XPVBM);
1109 xpvbm->xpv_pv = (char*)PL_xpvbm_arenaroot;
1110 PL_xpvbm_arenaroot = xpvbm;
1112 xpvbmend = &xpvbm[1008 / sizeof(XPVBM) - 1];
1113 PL_xpvbm_root = ++xpvbm;
1114 while (xpvbm < xpvbmend) {
1115 xpvbm->xpv_pv = (char*)(xpvbm + 1);
1122 # define my_safemalloc(s) (void*)safexmalloc(717,s)
1123 # define my_safefree(p) safexfree((char*)p)
1125 # define my_safemalloc(s) (void*)safemalloc(s)
1126 # define my_safefree(p) safefree((char*)p)
1131 #define new_XIV() my_safemalloc(sizeof(XPVIV))
1132 #define del_XIV(p) my_safefree(p)
1134 #define new_XNV() my_safemalloc(sizeof(XPVNV))
1135 #define del_XNV(p) my_safefree(p)
1137 #define new_XRV() my_safemalloc(sizeof(XRV))
1138 #define del_XRV(p) my_safefree(p)
1140 #define new_XPV() my_safemalloc(sizeof(XPV))
1141 #define del_XPV(p) my_safefree(p)
1143 #define new_XPVIV() my_safemalloc(sizeof(XPVIV))
1144 #define del_XPVIV(p) my_safefree(p)
1146 #define new_XPVNV() my_safemalloc(sizeof(XPVNV))
1147 #define del_XPVNV(p) my_safefree(p)
1149 #define new_XPVCV() my_safemalloc(sizeof(XPVCV))
1150 #define del_XPVCV(p) my_safefree(p)
1152 #define new_XPVAV() my_safemalloc(sizeof(XPVAV))
1153 #define del_XPVAV(p) my_safefree(p)
1155 #define new_XPVHV() my_safemalloc(sizeof(XPVHV))
1156 #define del_XPVHV(p) my_safefree(p)
1158 #define new_XPVMG() my_safemalloc(sizeof(XPVMG))
1159 #define del_XPVMG(p) my_safefree(p)
1161 #define new_XPVLV() my_safemalloc(sizeof(XPVLV))
1162 #define del_XPVLV(p) my_safefree(p)
1164 #define new_XPVBM() my_safemalloc(sizeof(XPVBM))
1165 #define del_XPVBM(p) my_safefree(p)
1169 #define new_XIV() (void*)new_xiv()
1170 #define del_XIV(p) del_xiv((XPVIV*) p)
1172 #define new_XNV() (void*)new_xnv()
1173 #define del_XNV(p) del_xnv((XPVNV*) p)
1175 #define new_XRV() (void*)new_xrv()
1176 #define del_XRV(p) del_xrv((XRV*) p)
1178 #define new_XPV() (void*)new_xpv()
1179 #define del_XPV(p) del_xpv((XPV *)p)
1181 #define new_XPVIV() (void*)new_xpviv()
1182 #define del_XPVIV(p) del_xpviv((XPVIV *)p)
1184 #define new_XPVNV() (void*)new_xpvnv()
1185 #define del_XPVNV(p) del_xpvnv((XPVNV *)p)
1187 #define new_XPVCV() (void*)new_xpvcv()
1188 #define del_XPVCV(p) del_xpvcv((XPVCV *)p)
1190 #define new_XPVAV() (void*)new_xpvav()
1191 #define del_XPVAV(p) del_xpvav((XPVAV *)p)
1193 #define new_XPVHV() (void*)new_xpvhv()
1194 #define del_XPVHV(p) del_xpvhv((XPVHV *)p)
1196 #define new_XPVMG() (void*)new_xpvmg()
1197 #define del_XPVMG(p) del_xpvmg((XPVMG *)p)
1199 #define new_XPVLV() (void*)new_xpvlv()
1200 #define del_XPVLV(p) del_xpvlv((XPVLV *)p)
1202 #define new_XPVBM() (void*)new_xpvbm()
1203 #define del_XPVBM(p) del_xpvbm((XPVBM *)p)
1207 #define new_XPVGV() my_safemalloc(sizeof(XPVGV))
1208 #define del_XPVGV(p) my_safefree(p)
1210 #define new_XPVFM() my_safemalloc(sizeof(XPVFM))
1211 #define del_XPVFM(p) my_safefree(p)
1213 #define new_XPVIO() my_safemalloc(sizeof(XPVIO))
1214 #define del_XPVIO(p) my_safefree(p)
1217 =for apidoc sv_upgrade
1219 Upgrade an SV to a more complex form. Generally adds a new body type to the
1220 SV, then copies across as much information as possible from the old body.
1221 You generally want to use the C<SvUPGRADE> macro wrapper. See also C<svtype>.
1227 Perl_sv_upgrade(pTHX_ register SV *sv, U32 mt)
1234 MAGIC* magic = NULL;
1237 if (mt != SVt_PV && SvREADONLY(sv) && SvFAKE(sv)) {
1238 sv_force_normal(sv);
1241 if (SvTYPE(sv) == mt)
1245 (void)SvOOK_off(sv);
1247 switch (SvTYPE(sv)) {
1268 else if (mt < SVt_PVIV)
1285 pv = (char*)SvRV(sv);
1305 else if (mt == SVt_NV)
1316 del_XPVIV(SvANY(sv));
1326 del_XPVNV(SvANY(sv));
1334 magic = SvMAGIC(sv);
1335 stash = SvSTASH(sv);
1336 del_XPVMG(SvANY(sv));
1339 Perl_croak(aTHX_ "Can't upgrade that kind of scalar");
1344 Perl_croak(aTHX_ "Can't upgrade to undef");
1346 SvANY(sv) = new_XIV();
1350 SvANY(sv) = new_XNV();
1354 SvANY(sv) = new_XRV();
1358 SvANY(sv) = new_XPV();
1364 SvANY(sv) = new_XPVIV();
1374 SvANY(sv) = new_XPVNV();
1382 SvANY(sv) = new_XPVMG();
1388 SvMAGIC(sv) = magic;
1389 SvSTASH(sv) = stash;
1392 SvANY(sv) = new_XPVLV();
1398 SvMAGIC(sv) = magic;
1399 SvSTASH(sv) = stash;
1406 SvANY(sv) = new_XPVAV();
1414 SvMAGIC(sv) = magic;
1415 SvSTASH(sv) = stash;
1421 SvANY(sv) = new_XPVHV();
1427 HvTOTALKEYS(sv) = 0;
1428 HvPLACEHOLDERS(sv) = 0;
1429 SvMAGIC(sv) = magic;
1430 SvSTASH(sv) = stash;
1437 SvANY(sv) = new_XPVCV();
1438 Zero(SvANY(sv), 1, XPVCV);
1444 SvMAGIC(sv) = magic;
1445 SvSTASH(sv) = stash;
1448 SvANY(sv) = new_XPVGV();
1454 SvMAGIC(sv) = magic;
1455 SvSTASH(sv) = stash;
1463 SvANY(sv) = new_XPVBM();
1469 SvMAGIC(sv) = magic;
1470 SvSTASH(sv) = stash;
1476 SvANY(sv) = new_XPVFM();
1477 Zero(SvANY(sv), 1, XPVFM);
1483 SvMAGIC(sv) = magic;
1484 SvSTASH(sv) = stash;
1487 SvANY(sv) = new_XPVIO();
1488 Zero(SvANY(sv), 1, XPVIO);
1494 SvMAGIC(sv) = magic;
1495 SvSTASH(sv) = stash;
1496 IoPAGE_LEN(sv) = 60;
1499 SvFLAGS(sv) &= ~SVTYPEMASK;
1505 =for apidoc sv_backoff
1507 Remove any string offset. You should normally use the C<SvOOK_off> macro
1514 Perl_sv_backoff(pTHX_ register SV *sv)
1518 char *s = SvPVX(sv);
1519 SvLEN(sv) += SvIVX(sv);
1520 SvPVX(sv) -= SvIVX(sv);
1522 Move(s, SvPVX(sv), SvCUR(sv)+1, char);
1524 SvFLAGS(sv) &= ~SVf_OOK;
1531 Expands the character buffer in the SV. If necessary, uses C<sv_unref> and
1532 upgrades the SV to C<SVt_PV>. Returns a pointer to the character buffer.
1533 Use the C<SvGROW> wrapper instead.
1539 Perl_sv_grow(pTHX_ register SV *sv, register STRLEN newlen)
1545 #ifdef HAS_64K_LIMIT
1546 if (newlen >= 0x10000) {
1547 PerlIO_printf(Perl_debug_log,
1548 "Allocation too large: %"UVxf"\n", (UV)newlen);
1551 #endif /* HAS_64K_LIMIT */
1554 if (SvTYPE(sv) < SVt_PV) {
1555 sv_upgrade(sv, SVt_PV);
1558 else if (SvOOK(sv)) { /* pv is offset? */
1561 if (newlen > SvLEN(sv))
1562 newlen += 10 * (newlen - SvCUR(sv)); /* avoid copy each time */
1563 #ifdef HAS_64K_LIMIT
1564 if (newlen >= 0x10000)
1571 if (newlen > SvLEN(sv)) { /* need more room? */
1572 if (SvLEN(sv) && s) {
1573 #if defined(MYMALLOC) && !defined(LEAKTEST)
1574 STRLEN l = malloced_size((void*)SvPVX(sv));
1580 Renew(s,newlen,char);
1583 /* sv_force_normal_flags() must not try to unshare the new
1584 PVX we allocate below. AMS 20010713 */
1585 if (SvREADONLY(sv) && SvFAKE(sv)) {
1589 New(703, s, newlen, char);
1590 if (SvPVX(sv) && SvCUR(sv)) {
1591 Move(SvPVX(sv), s, (newlen < SvCUR(sv)) ? newlen : SvCUR(sv), char);
1595 SvLEN_set(sv, newlen);
1601 =for apidoc sv_setiv
1603 Copies an integer into the given SV, upgrading first if necessary.
1604 Does not handle 'set' magic. See also C<sv_setiv_mg>.
1610 Perl_sv_setiv(pTHX_ register SV *sv, IV i)
1612 SV_CHECK_THINKFIRST(sv);
1613 switch (SvTYPE(sv)) {
1615 sv_upgrade(sv, SVt_IV);
1618 sv_upgrade(sv, SVt_PVNV);
1622 sv_upgrade(sv, SVt_PVIV);
1631 Perl_croak(aTHX_ "Can't coerce %s to integer in %s", sv_reftype(sv,0),
1634 (void)SvIOK_only(sv); /* validate number */
1640 =for apidoc sv_setiv_mg
1642 Like C<sv_setiv>, but also handles 'set' magic.
1648 Perl_sv_setiv_mg(pTHX_ register SV *sv, IV i)
1655 =for apidoc sv_setuv
1657 Copies an unsigned integer into the given SV, upgrading first if necessary.
1658 Does not handle 'set' magic. See also C<sv_setuv_mg>.
1664 Perl_sv_setuv(pTHX_ register SV *sv, UV u)
1666 /* With these two if statements:
1667 u=1.49 s=0.52 cu=72.49 cs=10.64 scripts=270 tests=20865
1670 u=1.35 s=0.47 cu=73.45 cs=11.43 scripts=270 tests=20865
1672 If you wish to remove them, please benchmark to see what the effect is
1674 if (u <= (UV)IV_MAX) {
1675 sv_setiv(sv, (IV)u);
1684 =for apidoc sv_setuv_mg
1686 Like C<sv_setuv>, but also handles 'set' magic.
1692 Perl_sv_setuv_mg(pTHX_ register SV *sv, UV u)
1694 /* With these two if statements:
1695 u=1.49 s=0.52 cu=72.49 cs=10.64 scripts=270 tests=20865
1698 u=1.35 s=0.47 cu=73.45 cs=11.43 scripts=270 tests=20865
1700 If you wish to remove them, please benchmark to see what the effect is
1702 if (u <= (UV)IV_MAX) {
1703 sv_setiv(sv, (IV)u);
1713 =for apidoc sv_setnv
1715 Copies a double into the given SV, upgrading first if necessary.
1716 Does not handle 'set' magic. See also C<sv_setnv_mg>.
1722 Perl_sv_setnv(pTHX_ register SV *sv, NV num)
1724 SV_CHECK_THINKFIRST(sv);
1725 switch (SvTYPE(sv)) {
1728 sv_upgrade(sv, SVt_NV);
1733 sv_upgrade(sv, SVt_PVNV);
1742 Perl_croak(aTHX_ "Can't coerce %s to number in %s", sv_reftype(sv,0),
1746 (void)SvNOK_only(sv); /* validate number */
1751 =for apidoc sv_setnv_mg
1753 Like C<sv_setnv>, but also handles 'set' magic.
1759 Perl_sv_setnv_mg(pTHX_ register SV *sv, NV num)
1765 /* Print an "isn't numeric" warning, using a cleaned-up,
1766 * printable version of the offending string
1770 S_not_a_number(pTHX_ SV *sv)
1777 dsv = sv_2mortal(newSVpv("", 0));
1778 pv = sv_uni_display(dsv, sv, 10, 0);
1781 char *limit = tmpbuf + sizeof(tmpbuf) - 8;
1782 /* each *s can expand to 4 chars + "...\0",
1783 i.e. need room for 8 chars */
1786 for (s = SvPVX(sv), end = s + SvCUR(sv); s < end && d < limit; s++) {
1788 if (ch & 128 && !isPRINT_LC(ch)) {
1797 else if (ch == '\r') {
1801 else if (ch == '\f') {
1805 else if (ch == '\\') {
1809 else if (ch == '\0') {
1813 else if (isPRINT_LC(ch))
1830 Perl_warner(aTHX_ packWARN(WARN_NUMERIC),
1831 "Argument \"%s\" isn't numeric in %s", pv,
1834 Perl_warner(aTHX_ packWARN(WARN_NUMERIC),
1835 "Argument \"%s\" isn't numeric", pv);
1839 =for apidoc looks_like_number
1841 Test if the content of an SV looks like a number (or is a number).
1842 C<Inf> and C<Infinity> are treated as numbers (so will not issue a
1843 non-numeric warning), even if your atof() doesn't grok them.
1849 Perl_looks_like_number(pTHX_ SV *sv)
1851 register char *sbegin;
1858 else if (SvPOKp(sv))
1859 sbegin = SvPV(sv, len);
1861 return 1; /* Historic. Wrong? */
1862 return grok_number(sbegin, len, NULL);
1865 /* Actually, ISO C leaves conversion of UV to IV undefined, but
1866 until proven guilty, assume that things are not that bad... */
1871 As 64 bit platforms often have an NV that doesn't preserve all bits of
1872 an IV (an assumption perl has been based on to date) it becomes necessary
1873 to remove the assumption that the NV always carries enough precision to
1874 recreate the IV whenever needed, and that the NV is the canonical form.
1875 Instead, IV/UV and NV need to be given equal rights. So as to not lose
1876 precision as a side effect of conversion (which would lead to insanity
1877 and the dragon(s) in t/op/numconvert.t getting very angry) the intent is
1878 1) to distinguish between IV/UV/NV slots that have cached a valid
1879 conversion where precision was lost and IV/UV/NV slots that have a
1880 valid conversion which has lost no precision
1881 2) to ensure that if a numeric conversion to one form is requested that
1882 would lose precision, the precise conversion (or differently
1883 imprecise conversion) is also performed and cached, to prevent
1884 requests for different numeric formats on the same SV causing
1885 lossy conversion chains. (lossless conversion chains are perfectly
1890 SvIOKp is true if the IV slot contains a valid value
1891 SvIOK is true only if the IV value is accurate (UV if SvIOK_UV true)
1892 SvNOKp is true if the NV slot contains a valid value
1893 SvNOK is true only if the NV value is accurate
1896 while converting from PV to NV, check to see if converting that NV to an
1897 IV(or UV) would lose accuracy over a direct conversion from PV to
1898 IV(or UV). If it would, cache both conversions, return NV, but mark
1899 SV as IOK NOKp (ie not NOK).
1901 While converting from PV to IV, check to see if converting that IV to an
1902 NV would lose accuracy over a direct conversion from PV to NV. If it
1903 would, cache both conversions, flag similarly.
1905 Before, the SV value "3.2" could become NV=3.2 IV=3 NOK, IOK quite
1906 correctly because if IV & NV were set NV *always* overruled.
1907 Now, "3.2" will become NV=3.2 IV=3 NOK, IOKp, because the flag's meaning
1908 changes - now IV and NV together means that the two are interchangeable:
1909 SvIVX == (IV) SvNVX && SvNVX == (NV) SvIVX;
1911 The benefit of this is that operations such as pp_add know that if
1912 SvIOK is true for both left and right operands, then integer addition
1913 can be used instead of floating point (for cases where the result won't
1914 overflow). Before, floating point was always used, which could lead to
1915 loss of precision compared with integer addition.
1917 * making IV and NV equal status should make maths accurate on 64 bit
1919 * may speed up maths somewhat if pp_add and friends start to use
1920 integers when possible instead of fp. (Hopefully the overhead in
1921 looking for SvIOK and checking for overflow will not outweigh the
1922 fp to integer speedup)
1923 * will slow down integer operations (callers of SvIV) on "inaccurate"
1924 values, as the change from SvIOK to SvIOKp will cause a call into
1925 sv_2iv each time rather than a macro access direct to the IV slot
1926 * should speed up number->string conversion on integers as IV is
1927 favoured when IV and NV are equally accurate
1929 ####################################################################
1930 You had better be using SvIOK_notUV if you want an IV for arithmetic:
1931 SvIOK is true if (IV or UV), so you might be getting (IV)SvUV.
1932 On the other hand, SvUOK is true iff UV.
1933 ####################################################################
1935 Your mileage will vary depending your CPU's relative fp to integer
1939 #ifndef NV_PRESERVES_UV
1940 # define IS_NUMBER_UNDERFLOW_IV 1
1941 # define IS_NUMBER_UNDERFLOW_UV 2
1942 # define IS_NUMBER_IV_AND_UV 2
1943 # define IS_NUMBER_OVERFLOW_IV 4
1944 # define IS_NUMBER_OVERFLOW_UV 5
1946 /* sv_2iuv_non_preserve(): private routine for use by sv_2iv() and sv_2uv() */
1948 /* For sv_2nv these three cases are "SvNOK and don't bother casting" */
1950 S_sv_2iuv_non_preserve(pTHX_ register SV *sv, I32 numtype)
1952 DEBUG_c(PerlIO_printf(Perl_debug_log,"sv_2iuv_non '%s', IV=0x%"UVxf" NV=%"NVgf" inttype=%"UVXf"\n", SvPVX(sv), SvIVX(sv), SvNVX(sv), (UV)numtype));
1953 if (SvNVX(sv) < (NV)IV_MIN) {
1954 (void)SvIOKp_on(sv);
1957 return IS_NUMBER_UNDERFLOW_IV;
1959 if (SvNVX(sv) > (NV)UV_MAX) {
1960 (void)SvIOKp_on(sv);
1964 return IS_NUMBER_OVERFLOW_UV;
1966 (void)SvIOKp_on(sv);
1968 /* Can't use strtol etc to convert this string. (See truth table in
1970 if (SvNVX(sv) <= (UV)IV_MAX) {
1971 SvIVX(sv) = I_V(SvNVX(sv));
1972 if ((NV)(SvIVX(sv)) == SvNVX(sv)) {
1973 SvIOK_on(sv); /* Integer is precise. NOK, IOK */
1975 /* Integer is imprecise. NOK, IOKp */
1977 return SvNVX(sv) < 0 ? IS_NUMBER_UNDERFLOW_UV : IS_NUMBER_IV_AND_UV;
1980 SvUVX(sv) = U_V(SvNVX(sv));
1981 if ((NV)(SvUVX(sv)) == SvNVX(sv)) {
1982 if (SvUVX(sv) == UV_MAX) {
1983 /* As we know that NVs don't preserve UVs, UV_MAX cannot
1984 possibly be preserved by NV. Hence, it must be overflow.
1986 return IS_NUMBER_OVERFLOW_UV;
1988 SvIOK_on(sv); /* Integer is precise. NOK, UOK */
1990 /* Integer is imprecise. NOK, IOKp */
1992 return IS_NUMBER_OVERFLOW_IV;
1994 #endif /* !NV_PRESERVES_UV*/
1999 Return the integer value of an SV, doing any necessary string conversion,
2000 magic etc. Normally used via the C<SvIV(sv)> and C<SvIVx(sv)> macros.
2006 Perl_sv_2iv(pTHX_ register SV *sv)
2010 if (SvGMAGICAL(sv)) {
2015 return I_V(SvNVX(sv));
2017 if (SvPOKp(sv) && SvLEN(sv))
2020 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
2021 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
2027 if (SvTHINKFIRST(sv)) {
2030 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,numer)) &&
2031 (SvTYPE(tmpstr) != SVt_RV || (SvRV(tmpstr) != SvRV(sv))))
2032 return SvIV(tmpstr);
2033 return PTR2IV(SvRV(sv));
2035 if (SvREADONLY(sv) && SvFAKE(sv)) {
2036 sv_force_normal(sv);
2038 if (SvREADONLY(sv) && !SvOK(sv)) {
2039 if (ckWARN(WARN_UNINITIALIZED))
2046 return (IV)(SvUVX(sv));
2053 /* erm. not sure. *should* never get NOKp (without NOK) from sv_2nv
2054 * without also getting a cached IV/UV from it at the same time
2055 * (ie PV->NV conversion should detect loss of accuracy and cache
2056 * IV or UV at same time to avoid this. NWC */
2058 if (SvTYPE(sv) == SVt_NV)
2059 sv_upgrade(sv, SVt_PVNV);
2061 (void)SvIOKp_on(sv); /* Must do this first, to clear any SvOOK */
2062 /* < not <= as for NV doesn't preserve UV, ((NV)IV_MAX+1) will almost
2063 certainly cast into the IV range at IV_MAX, whereas the correct
2064 answer is the UV IV_MAX +1. Hence < ensures that dodgy boundary
2066 if (SvNVX(sv) < (NV)IV_MAX + 0.5) {
2067 SvIVX(sv) = I_V(SvNVX(sv));
2068 if (SvNVX(sv) == (NV) SvIVX(sv)
2069 #ifndef NV_PRESERVES_UV
2070 && (((UV)1 << NV_PRESERVES_UV_BITS) >
2071 (UV)(SvIVX(sv) > 0 ? SvIVX(sv) : -SvIVX(sv)))
2072 /* Don't flag it as "accurately an integer" if the number
2073 came from a (by definition imprecise) NV operation, and
2074 we're outside the range of NV integer precision */
2077 SvIOK_on(sv); /* Can this go wrong with rounding? NWC */
2078 DEBUG_c(PerlIO_printf(Perl_debug_log,
2079 "0x%"UVxf" iv(%"NVgf" => %"IVdf") (precise)\n",
2085 /* IV not precise. No need to convert from PV, as NV
2086 conversion would already have cached IV if it detected
2087 that PV->IV would be better than PV->NV->IV
2088 flags already correct - don't set public IOK. */
2089 DEBUG_c(PerlIO_printf(Perl_debug_log,
2090 "0x%"UVxf" iv(%"NVgf" => %"IVdf") (imprecise)\n",
2095 /* Can the above go wrong if SvIVX == IV_MIN and SvNVX < IV_MIN,
2096 but the cast (NV)IV_MIN rounds to a the value less (more
2097 negative) than IV_MIN which happens to be equal to SvNVX ??
2098 Analogous to 0xFFFFFFFFFFFFFFFF rounding up to NV (2**64) and
2099 NV rounding back to 0xFFFFFFFFFFFFFFFF, so UVX == UV(NVX) and
2100 (NV)UVX == NVX are both true, but the values differ. :-(
2101 Hopefully for 2s complement IV_MIN is something like
2102 0x8000000000000000 which will be exact. NWC */
2105 SvUVX(sv) = U_V(SvNVX(sv));
2107 (SvNVX(sv) == (NV) SvUVX(sv))
2108 #ifndef NV_PRESERVES_UV
2109 /* Make sure it's not 0xFFFFFFFFFFFFFFFF */
2110 /*&& (SvUVX(sv) != UV_MAX) irrelevant with code below */
2111 && (((UV)1 << NV_PRESERVES_UV_BITS) > SvUVX(sv))
2112 /* Don't flag it as "accurately an integer" if the number
2113 came from a (by definition imprecise) NV operation, and
2114 we're outside the range of NV integer precision */
2120 DEBUG_c(PerlIO_printf(Perl_debug_log,
2121 "0x%"UVxf" 2iv(%"UVuf" => %"IVdf") (as unsigned)\n",
2125 return (IV)SvUVX(sv);
2128 else if (SvPOKp(sv) && SvLEN(sv)) {
2130 int numtype = grok_number(SvPVX(sv), SvCUR(sv), &value);
2131 /* We want to avoid a possible problem when we cache an IV which
2132 may be later translated to an NV, and the resulting NV is not
2133 the same as the direct translation of the initial string
2134 (eg 123.456 can shortcut to the IV 123 with atol(), but we must
2135 be careful to ensure that the value with the .456 is around if the
2136 NV value is requested in the future).
2138 This means that if we cache such an IV, we need to cache the
2139 NV as well. Moreover, we trade speed for space, and do not
2140 cache the NV if we are sure it's not needed.
2143 /* SVt_PVNV is one higher than SVt_PVIV, hence this order */
2144 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2145 == IS_NUMBER_IN_UV) {
2146 /* It's definitely an integer, only upgrade to PVIV */
2147 if (SvTYPE(sv) < SVt_PVIV)
2148 sv_upgrade(sv, SVt_PVIV);
2150 } else if (SvTYPE(sv) < SVt_PVNV)
2151 sv_upgrade(sv, SVt_PVNV);
2153 /* If NV preserves UV then we only use the UV value if we know that
2154 we aren't going to call atof() below. If NVs don't preserve UVs
2155 then the value returned may have more precision than atof() will
2156 return, even though value isn't perfectly accurate. */
2157 if ((numtype & (IS_NUMBER_IN_UV
2158 #ifdef NV_PRESERVES_UV
2161 )) == IS_NUMBER_IN_UV) {
2162 /* This won't turn off the public IOK flag if it was set above */
2163 (void)SvIOKp_on(sv);
2165 if (!(numtype & IS_NUMBER_NEG)) {
2167 if (value <= (UV)IV_MAX) {
2168 SvIVX(sv) = (IV)value;
2174 /* 2s complement assumption */
2175 if (value <= (UV)IV_MIN) {
2176 SvIVX(sv) = -(IV)value;
2178 /* Too negative for an IV. This is a double upgrade, but
2179 I'm assuming it will be rare. */
2180 if (SvTYPE(sv) < SVt_PVNV)
2181 sv_upgrade(sv, SVt_PVNV);
2185 SvNVX(sv) = -(NV)value;
2190 /* For !NV_PRESERVES_UV and IS_NUMBER_IN_UV and IS_NUMBER_NOT_INT we
2191 will be in the previous block to set the IV slot, and the next
2192 block to set the NV slot. So no else here. */
2194 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2195 != IS_NUMBER_IN_UV) {
2196 /* It wasn't an (integer that doesn't overflow the UV). */
2197 SvNVX(sv) = Atof(SvPVX(sv));
2199 if (! numtype && ckWARN(WARN_NUMERIC))
2202 #if defined(USE_LONG_DOUBLE)
2203 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2iv(%" PERL_PRIgldbl ")\n",
2204 PTR2UV(sv), SvNVX(sv)));
2206 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2iv(%"NVgf")\n",
2207 PTR2UV(sv), SvNVX(sv)));
2211 #ifdef NV_PRESERVES_UV
2212 (void)SvIOKp_on(sv);
2214 if (SvNVX(sv) < (NV)IV_MAX + 0.5) {
2215 SvIVX(sv) = I_V(SvNVX(sv));
2216 if ((NV)(SvIVX(sv)) == SvNVX(sv)) {
2219 /* Integer is imprecise. NOK, IOKp */
2221 /* UV will not work better than IV */
2223 if (SvNVX(sv) > (NV)UV_MAX) {
2225 /* Integer is inaccurate. NOK, IOKp, is UV */
2229 SvUVX(sv) = U_V(SvNVX(sv));
2230 /* 0xFFFFFFFFFFFFFFFF not an issue in here */
2231 if ((NV)(SvUVX(sv)) == SvNVX(sv)) {
2235 /* Integer is imprecise. NOK, IOKp, is UV */
2241 #else /* NV_PRESERVES_UV */
2242 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2243 == (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT)) {
2244 /* The IV slot will have been set from value returned by
2245 grok_number above. The NV slot has just been set using
2248 assert (SvIOKp(sv));
2250 if (((UV)1 << NV_PRESERVES_UV_BITS) >
2251 U_V(SvNVX(sv) > 0 ? SvNVX(sv) : -SvNVX(sv))) {
2252 /* Small enough to preserve all bits. */
2253 (void)SvIOKp_on(sv);
2255 SvIVX(sv) = I_V(SvNVX(sv));
2256 if ((NV)(SvIVX(sv)) == SvNVX(sv))
2258 /* Assumption: first non-preserved integer is < IV_MAX,
2259 this NV is in the preserved range, therefore: */
2260 if (!(U_V(SvNVX(sv) > 0 ? SvNVX(sv) : -SvNVX(sv))
2262 Perl_croak(aTHX_ "sv_2iv assumed (U_V(fabs(SvNVX(sv))) < (UV)IV_MAX) but SvNVX(sv)=%"NVgf" U_V is 0x%"UVxf", IV_MAX is 0x%"UVxf"\n", SvNVX(sv), U_V(SvNVX(sv)), (UV)IV_MAX);
2266 0 0 already failed to read UV.
2267 0 1 already failed to read UV.
2268 1 0 you won't get here in this case. IV/UV
2269 slot set, public IOK, Atof() unneeded.
2270 1 1 already read UV.
2271 so there's no point in sv_2iuv_non_preserve() attempting
2272 to use atol, strtol, strtoul etc. */
2273 if (sv_2iuv_non_preserve (sv, numtype)
2274 >= IS_NUMBER_OVERFLOW_IV)
2278 #endif /* NV_PRESERVES_UV */
2281 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP))
2283 if (SvTYPE(sv) < SVt_IV)
2284 /* Typically the caller expects that sv_any is not NULL now. */
2285 sv_upgrade(sv, SVt_IV);
2288 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2iv(%"IVdf")\n",
2289 PTR2UV(sv),SvIVX(sv)));
2290 return SvIsUV(sv) ? (IV)SvUVX(sv) : SvIVX(sv);
2296 Return the unsigned integer value of an SV, doing any necessary string
2297 conversion, magic etc. Normally used via the C<SvUV(sv)> and C<SvUVx(sv)>
2304 Perl_sv_2uv(pTHX_ register SV *sv)
2308 if (SvGMAGICAL(sv)) {
2313 return U_V(SvNVX(sv));
2314 if (SvPOKp(sv) && SvLEN(sv))
2317 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
2318 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
2324 if (SvTHINKFIRST(sv)) {
2327 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,numer)) &&
2328 (SvTYPE(tmpstr) != SVt_RV || (SvRV(tmpstr) != SvRV(sv))))
2329 return SvUV(tmpstr);
2330 return PTR2UV(SvRV(sv));
2332 if (SvREADONLY(sv) && SvFAKE(sv)) {
2333 sv_force_normal(sv);
2335 if (SvREADONLY(sv) && !SvOK(sv)) {
2336 if (ckWARN(WARN_UNINITIALIZED))
2346 return (UV)SvIVX(sv);
2350 /* erm. not sure. *should* never get NOKp (without NOK) from sv_2nv
2351 * without also getting a cached IV/UV from it at the same time
2352 * (ie PV->NV conversion should detect loss of accuracy and cache
2353 * IV or UV at same time to avoid this. */
2354 /* IV-over-UV optimisation - choose to cache IV if possible */
2356 if (SvTYPE(sv) == SVt_NV)
2357 sv_upgrade(sv, SVt_PVNV);
2359 (void)SvIOKp_on(sv); /* Must do this first, to clear any SvOOK */
2360 if (SvNVX(sv) < (NV)IV_MAX + 0.5) {
2361 SvIVX(sv) = I_V(SvNVX(sv));
2362 if (SvNVX(sv) == (NV) SvIVX(sv)
2363 #ifndef NV_PRESERVES_UV
2364 && (((UV)1 << NV_PRESERVES_UV_BITS) >
2365 (UV)(SvIVX(sv) > 0 ? SvIVX(sv) : -SvIVX(sv)))
2366 /* Don't flag it as "accurately an integer" if the number
2367 came from a (by definition imprecise) NV operation, and
2368 we're outside the range of NV integer precision */
2371 SvIOK_on(sv); /* Can this go wrong with rounding? NWC */
2372 DEBUG_c(PerlIO_printf(Perl_debug_log,
2373 "0x%"UVxf" uv(%"NVgf" => %"IVdf") (precise)\n",
2379 /* IV not precise. No need to convert from PV, as NV
2380 conversion would already have cached IV if it detected
2381 that PV->IV would be better than PV->NV->IV
2382 flags already correct - don't set public IOK. */
2383 DEBUG_c(PerlIO_printf(Perl_debug_log,
2384 "0x%"UVxf" uv(%"NVgf" => %"IVdf") (imprecise)\n",
2389 /* Can the above go wrong if SvIVX == IV_MIN and SvNVX < IV_MIN,
2390 but the cast (NV)IV_MIN rounds to a the value less (more
2391 negative) than IV_MIN which happens to be equal to SvNVX ??
2392 Analogous to 0xFFFFFFFFFFFFFFFF rounding up to NV (2**64) and
2393 NV rounding back to 0xFFFFFFFFFFFFFFFF, so UVX == UV(NVX) and
2394 (NV)UVX == NVX are both true, but the values differ. :-(
2395 Hopefully for 2s complement IV_MIN is something like
2396 0x8000000000000000 which will be exact. NWC */
2399 SvUVX(sv) = U_V(SvNVX(sv));
2401 (SvNVX(sv) == (NV) SvUVX(sv))
2402 #ifndef NV_PRESERVES_UV
2403 /* Make sure it's not 0xFFFFFFFFFFFFFFFF */
2404 /*&& (SvUVX(sv) != UV_MAX) irrelevant with code below */
2405 && (((UV)1 << NV_PRESERVES_UV_BITS) > SvUVX(sv))
2406 /* Don't flag it as "accurately an integer" if the number
2407 came from a (by definition imprecise) NV operation, and
2408 we're outside the range of NV integer precision */
2413 DEBUG_c(PerlIO_printf(Perl_debug_log,
2414 "0x%"UVxf" 2uv(%"UVuf" => %"IVdf") (as unsigned)\n",
2420 else if (SvPOKp(sv) && SvLEN(sv)) {
2422 int numtype = grok_number(SvPVX(sv), SvCUR(sv), &value);
2424 /* We want to avoid a possible problem when we cache a UV which
2425 may be later translated to an NV, and the resulting NV is not
2426 the translation of the initial data.
2428 This means that if we cache such a UV, we need to cache the
2429 NV as well. Moreover, we trade speed for space, and do not
2430 cache the NV if not needed.
2433 /* SVt_PVNV is one higher than SVt_PVIV, hence this order */
2434 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2435 == IS_NUMBER_IN_UV) {
2436 /* It's definitely an integer, only upgrade to PVIV */
2437 if (SvTYPE(sv) < SVt_PVIV)
2438 sv_upgrade(sv, SVt_PVIV);
2440 } else if (SvTYPE(sv) < SVt_PVNV)
2441 sv_upgrade(sv, SVt_PVNV);
2443 /* If NV preserves UV then we only use the UV value if we know that
2444 we aren't going to call atof() below. If NVs don't preserve UVs
2445 then the value returned may have more precision than atof() will
2446 return, even though it isn't accurate. */
2447 if ((numtype & (IS_NUMBER_IN_UV
2448 #ifdef NV_PRESERVES_UV
2451 )) == IS_NUMBER_IN_UV) {
2452 /* This won't turn off the public IOK flag if it was set above */
2453 (void)SvIOKp_on(sv);
2455 if (!(numtype & IS_NUMBER_NEG)) {
2457 if (value <= (UV)IV_MAX) {
2458 SvIVX(sv) = (IV)value;
2460 /* it didn't overflow, and it was positive. */
2465 /* 2s complement assumption */
2466 if (value <= (UV)IV_MIN) {
2467 SvIVX(sv) = -(IV)value;
2469 /* Too negative for an IV. This is a double upgrade, but
2470 I'm assuming it will be rare. */
2471 if (SvTYPE(sv) < SVt_PVNV)
2472 sv_upgrade(sv, SVt_PVNV);
2476 SvNVX(sv) = -(NV)value;
2482 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2483 != IS_NUMBER_IN_UV) {
2484 /* It wasn't an integer, or it overflowed the UV. */
2485 SvNVX(sv) = Atof(SvPVX(sv));
2487 if (! numtype && ckWARN(WARN_NUMERIC))
2490 #if defined(USE_LONG_DOUBLE)
2491 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2uv(%" PERL_PRIgldbl ")\n",
2492 PTR2UV(sv), SvNVX(sv)));
2494 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2uv(%"NVgf")\n",
2495 PTR2UV(sv), SvNVX(sv)));
2498 #ifdef NV_PRESERVES_UV
2499 (void)SvIOKp_on(sv);
2501 if (SvNVX(sv) < (NV)IV_MAX + 0.5) {
2502 SvIVX(sv) = I_V(SvNVX(sv));
2503 if ((NV)(SvIVX(sv)) == SvNVX(sv)) {
2506 /* Integer is imprecise. NOK, IOKp */
2508 /* UV will not work better than IV */
2510 if (SvNVX(sv) > (NV)UV_MAX) {
2512 /* Integer is inaccurate. NOK, IOKp, is UV */
2516 SvUVX(sv) = U_V(SvNVX(sv));
2517 /* 0xFFFFFFFFFFFFFFFF not an issue in here, NVs
2518 NV preservse UV so can do correct comparison. */
2519 if ((NV)(SvUVX(sv)) == SvNVX(sv)) {
2523 /* Integer is imprecise. NOK, IOKp, is UV */
2528 #else /* NV_PRESERVES_UV */
2529 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2530 == (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT)) {
2531 /* The UV slot will have been set from value returned by
2532 grok_number above. The NV slot has just been set using
2535 assert (SvIOKp(sv));
2537 if (((UV)1 << NV_PRESERVES_UV_BITS) >
2538 U_V(SvNVX(sv) > 0 ? SvNVX(sv) : -SvNVX(sv))) {
2539 /* Small enough to preserve all bits. */
2540 (void)SvIOKp_on(sv);
2542 SvIVX(sv) = I_V(SvNVX(sv));
2543 if ((NV)(SvIVX(sv)) == SvNVX(sv))
2545 /* Assumption: first non-preserved integer is < IV_MAX,
2546 this NV is in the preserved range, therefore: */
2547 if (!(U_V(SvNVX(sv) > 0 ? SvNVX(sv) : -SvNVX(sv))
2549 Perl_croak(aTHX_ "sv_2uv assumed (U_V(fabs(SvNVX(sv))) < (UV)IV_MAX) but SvNVX(sv)=%"NVgf" U_V is 0x%"UVxf", IV_MAX is 0x%"UVxf"\n", SvNVX(sv), U_V(SvNVX(sv)), (UV)IV_MAX);
2552 sv_2iuv_non_preserve (sv, numtype);
2554 #endif /* NV_PRESERVES_UV */
2558 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
2559 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
2562 if (SvTYPE(sv) < SVt_IV)
2563 /* Typically the caller expects that sv_any is not NULL now. */
2564 sv_upgrade(sv, SVt_IV);
2568 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2uv(%"UVuf")\n",
2569 PTR2UV(sv),SvUVX(sv)));
2570 return SvIsUV(sv) ? SvUVX(sv) : (UV)SvIVX(sv);
2576 Return the num value of an SV, doing any necessary string or integer
2577 conversion, magic etc. Normally used via the C<SvNV(sv)> and C<SvNVx(sv)>
2584 Perl_sv_2nv(pTHX_ register SV *sv)
2588 if (SvGMAGICAL(sv)) {
2592 if (SvPOKp(sv) && SvLEN(sv)) {
2593 if (ckWARN(WARN_NUMERIC) && !SvIOKp(sv) &&
2594 !grok_number(SvPVX(sv), SvCUR(sv), NULL))
2596 return Atof(SvPVX(sv));
2600 return (NV)SvUVX(sv);
2602 return (NV)SvIVX(sv);
2605 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
2606 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
2612 if (SvTHINKFIRST(sv)) {
2615 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,numer)) &&
2616 (SvTYPE(tmpstr) != SVt_RV || (SvRV(tmpstr) != SvRV(sv))))
2617 return SvNV(tmpstr);
2618 return PTR2NV(SvRV(sv));
2620 if (SvREADONLY(sv) && SvFAKE(sv)) {
2621 sv_force_normal(sv);
2623 if (SvREADONLY(sv) && !SvOK(sv)) {
2624 if (ckWARN(WARN_UNINITIALIZED))
2629 if (SvTYPE(sv) < SVt_NV) {
2630 if (SvTYPE(sv) == SVt_IV)
2631 sv_upgrade(sv, SVt_PVNV);
2633 sv_upgrade(sv, SVt_NV);
2634 #ifdef USE_LONG_DOUBLE
2636 STORE_NUMERIC_LOCAL_SET_STANDARD();
2637 PerlIO_printf(Perl_debug_log,
2638 "0x%"UVxf" num(%" PERL_PRIgldbl ")\n",
2639 PTR2UV(sv), SvNVX(sv));
2640 RESTORE_NUMERIC_LOCAL();
2644 STORE_NUMERIC_LOCAL_SET_STANDARD();
2645 PerlIO_printf(Perl_debug_log, "0x%"UVxf" num(%"NVgf")\n",
2646 PTR2UV(sv), SvNVX(sv));
2647 RESTORE_NUMERIC_LOCAL();
2651 else if (SvTYPE(sv) < SVt_PVNV)
2652 sv_upgrade(sv, SVt_PVNV);
2657 SvNVX(sv) = SvIsUV(sv) ? (NV)SvUVX(sv) : (NV)SvIVX(sv);
2658 #ifdef NV_PRESERVES_UV
2661 /* Only set the public NV OK flag if this NV preserves the IV */
2662 /* Check it's not 0xFFFFFFFFFFFFFFFF */
2663 if (SvIsUV(sv) ? ((SvUVX(sv) != UV_MAX)&&(SvUVX(sv) == U_V(SvNVX(sv))))
2664 : (SvIVX(sv) == I_V(SvNVX(sv))))
2670 else if (SvPOKp(sv) && SvLEN(sv)) {
2672 int numtype = grok_number(SvPVX(sv), SvCUR(sv), &value);
2673 if (ckWARN(WARN_NUMERIC) && !SvIOKp(sv) && !numtype)
2675 #ifdef NV_PRESERVES_UV
2676 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2677 == IS_NUMBER_IN_UV) {
2678 /* It's definitely an integer */
2679 SvNVX(sv) = (numtype & IS_NUMBER_NEG) ? -(NV)value : (NV)value;
2681 SvNVX(sv) = Atof(SvPVX(sv));
2684 SvNVX(sv) = Atof(SvPVX(sv));
2685 /* Only set the public NV OK flag if this NV preserves the value in
2686 the PV at least as well as an IV/UV would.
2687 Not sure how to do this 100% reliably. */
2688 /* if that shift count is out of range then Configure's test is
2689 wonky. We shouldn't be in here with NV_PRESERVES_UV_BITS ==
2691 if (((UV)1 << NV_PRESERVES_UV_BITS) >
2692 U_V(SvNVX(sv) > 0 ? SvNVX(sv) : -SvNVX(sv))) {
2693 SvNOK_on(sv); /* Definitely small enough to preserve all bits */
2694 } else if (!(numtype & IS_NUMBER_IN_UV)) {
2695 /* Can't use strtol etc to convert this string, so don't try.
2696 sv_2iv and sv_2uv will use the NV to convert, not the PV. */
2699 /* value has been set. It may not be precise. */
2700 if ((numtype & IS_NUMBER_NEG) && (value > (UV)IV_MIN)) {
2701 /* 2s complement assumption for (UV)IV_MIN */
2702 SvNOK_on(sv); /* Integer is too negative. */
2707 if (numtype & IS_NUMBER_NEG) {
2708 SvIVX(sv) = -(IV)value;
2709 } else if (value <= (UV)IV_MAX) {
2710 SvIVX(sv) = (IV)value;
2716 if (numtype & IS_NUMBER_NOT_INT) {
2717 /* I believe that even if the original PV had decimals,
2718 they are lost beyond the limit of the FP precision.
2719 However, neither is canonical, so both only get p
2720 flags. NWC, 2000/11/25 */
2721 /* Both already have p flags, so do nothing */
2724 if (SvNVX(sv) < (NV)IV_MAX + 0.5) {
2725 if (SvIVX(sv) == I_V(nv)) {
2730 /* It had no "." so it must be integer. */
2733 /* between IV_MAX and NV(UV_MAX).
2734 Could be slightly > UV_MAX */
2736 if (numtype & IS_NUMBER_NOT_INT) {
2737 /* UV and NV both imprecise. */
2739 UV nv_as_uv = U_V(nv);
2741 if (value == nv_as_uv && SvUVX(sv) != UV_MAX) {
2752 #endif /* NV_PRESERVES_UV */
2755 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP))
2757 if (SvTYPE(sv) < SVt_NV)
2758 /* Typically the caller expects that sv_any is not NULL now. */
2759 /* XXX Ilya implies that this is a bug in callers that assume this
2760 and ideally should be fixed. */
2761 sv_upgrade(sv, SVt_NV);
2764 #if defined(USE_LONG_DOUBLE)
2766 STORE_NUMERIC_LOCAL_SET_STANDARD();
2767 PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2nv(%" PERL_PRIgldbl ")\n",
2768 PTR2UV(sv), SvNVX(sv));
2769 RESTORE_NUMERIC_LOCAL();
2773 STORE_NUMERIC_LOCAL_SET_STANDARD();
2774 PerlIO_printf(Perl_debug_log, "0x%"UVxf" 1nv(%"NVgf")\n",
2775 PTR2UV(sv), SvNVX(sv));
2776 RESTORE_NUMERIC_LOCAL();
2782 /* asIV(): extract an integer from the string value of an SV.
2783 * Caller must validate PVX */
2786 S_asIV(pTHX_ SV *sv)
2789 int numtype = grok_number(SvPVX(sv), SvCUR(sv), &value);
2791 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2792 == IS_NUMBER_IN_UV) {
2793 /* It's definitely an integer */
2794 if (numtype & IS_NUMBER_NEG) {
2795 if (value < (UV)IV_MIN)
2798 if (value < (UV)IV_MAX)
2803 if (ckWARN(WARN_NUMERIC))
2806 return I_V(Atof(SvPVX(sv)));
2809 /* asUV(): extract an unsigned integer from the string value of an SV
2810 * Caller must validate PVX */
2813 S_asUV(pTHX_ SV *sv)
2816 int numtype = grok_number(SvPVX(sv), SvCUR(sv), &value);
2818 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2819 == IS_NUMBER_IN_UV) {
2820 /* It's definitely an integer */
2821 if (!(numtype & IS_NUMBER_NEG))
2825 if (ckWARN(WARN_NUMERIC))
2828 return U_V(Atof(SvPVX(sv)));
2832 =for apidoc sv_2pv_nolen
2834 Like C<sv_2pv()>, but doesn't return the length too. You should usually
2835 use the macro wrapper C<SvPV_nolen(sv)> instead.
2840 Perl_sv_2pv_nolen(pTHX_ register SV *sv)
2843 return sv_2pv(sv, &n_a);
2846 /* uiv_2buf(): private routine for use by sv_2pv_flags(): print an IV or
2847 * UV as a string towards the end of buf, and return pointers to start and
2850 * We assume that buf is at least TYPE_CHARS(UV) long.
2854 uiv_2buf(char *buf, IV iv, UV uv, int is_uv, char **peob)
2856 char *ptr = buf + TYPE_CHARS(UV);
2870 *--ptr = '0' + (char)(uv % 10);
2879 =for apidoc sv_2pv_flags
2881 Returns a pointer to the string value of an SV, and sets *lp to its length.
2882 If flags includes SV_GMAGIC, does an mg_get() first. Coerces sv to a string
2884 Normally invoked via the C<SvPV_flags> macro. C<sv_2pv()> and C<sv_2pv_nomg>
2885 usually end up here too.
2891 Perl_sv_2pv_flags(pTHX_ register SV *sv, STRLEN *lp, I32 flags)
2896 char tbuf[64]; /* Must fit sprintf/Gconvert of longest IV/NV */
2897 char *tmpbuf = tbuf;
2903 if (SvGMAGICAL(sv)) {
2904 if (flags & SV_GMAGIC)
2912 (void)sprintf(tmpbuf,"%"UVuf, (UV)SvUVX(sv));
2914 (void)sprintf(tmpbuf,"%"IVdf, (IV)SvIVX(sv));
2919 Gconvert(SvNVX(sv), NV_DIG, 0, tmpbuf);
2924 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
2925 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
2932 if (SvTHINKFIRST(sv)) {
2935 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,string)) &&
2936 (SvTYPE(tmpstr) != SVt_RV || (SvRV(tmpstr) != SvRV(sv))))
2937 return SvPV(tmpstr,*lp);
2944 switch (SvTYPE(sv)) {
2946 if ( ((SvFLAGS(sv) &
2947 (SVs_OBJECT|SVf_OK|SVs_GMG|SVs_SMG|SVs_RMG))
2948 == (SVs_OBJECT|SVs_RMG))
2949 && strEQ(s=HvNAME(SvSTASH(sv)), "Regexp")
2950 && (mg = mg_find(sv, PERL_MAGIC_qr))) {
2951 regexp *re = (regexp *)mg->mg_obj;
2954 char *fptr = "msix";
2959 char need_newline = 0;
2960 U16 reganch = (U16)((re->reganch & PMf_COMPILETIME) >> 12);
2962 while((ch = *fptr++)) {
2964 reflags[left++] = ch;
2967 reflags[right--] = ch;
2972 reflags[left] = '-';
2976 mg->mg_len = re->prelen + 4 + left;
2978 * If /x was used, we have to worry about a regex
2979 * ending with a comment later being embedded
2980 * within another regex. If so, we don't want this
2981 * regex's "commentization" to leak out to the
2982 * right part of the enclosing regex, we must cap
2983 * it with a newline.
2985 * So, if /x was used, we scan backwards from the
2986 * end of the regex. If we find a '#' before we
2987 * find a newline, we need to add a newline
2988 * ourself. If we find a '\n' first (or if we
2989 * don't find '#' or '\n'), we don't need to add
2990 * anything. -jfriedl
2992 if (PMf_EXTENDED & re->reganch)
2994 char *endptr = re->precomp + re->prelen;
2995 while (endptr >= re->precomp)
2997 char c = *(endptr--);
2999 break; /* don't need another */
3001 /* we end while in a comment, so we
3003 mg->mg_len++; /* save space for it */
3004 need_newline = 1; /* note to add it */
3009 New(616, mg->mg_ptr, mg->mg_len + 1 + left, char);
3010 Copy("(?", mg->mg_ptr, 2, char);
3011 Copy(reflags, mg->mg_ptr+2, left, char);
3012 Copy(":", mg->mg_ptr+left+2, 1, char);
3013 Copy(re->precomp, mg->mg_ptr+3+left, re->prelen, char);
3015 mg->mg_ptr[mg->mg_len - 2] = '\n';
3016 mg->mg_ptr[mg->mg_len - 1] = ')';
3017 mg->mg_ptr[mg->mg_len] = 0;
3019 PL_reginterp_cnt += re->program[0].next_off;
3031 case SVt_PVBM: if (SvROK(sv))
3034 s = "SCALAR"; break;
3035 case SVt_PVLV: s = "LVALUE"; break;
3036 case SVt_PVAV: s = "ARRAY"; break;
3037 case SVt_PVHV: s = "HASH"; break;
3038 case SVt_PVCV: s = "CODE"; break;
3039 case SVt_PVGV: s = "GLOB"; break;
3040 case SVt_PVFM: s = "FORMAT"; break;
3041 case SVt_PVIO: s = "IO"; break;
3042 default: s = "UNKNOWN"; break;
3046 HV *svs = SvSTASH(sv);
3049 /* [20011101.072] This bandaid for C<package;>
3050 should eventually be removed. AMS 20011103 */
3051 (svs ? HvNAME(svs) : "<none>"), s
3056 Perl_sv_catpvf(aTHX_ tsv, "(0x%"UVxf")", PTR2UV(sv));
3062 if (SvREADONLY(sv) && !SvOK(sv)) {
3063 if (ckWARN(WARN_UNINITIALIZED))
3069 if (SvIOK(sv) || ((SvIOKp(sv) && !SvNOKp(sv)))) {
3070 /* I'm assuming that if both IV and NV are equally valid then
3071 converting the IV is going to be more efficient */
3072 U32 isIOK = SvIOK(sv);
3073 U32 isUIOK = SvIsUV(sv);
3074 char buf[TYPE_CHARS(UV)];
3077 if (SvTYPE(sv) < SVt_PVIV)
3078 sv_upgrade(sv, SVt_PVIV);
3080 ptr = uiv_2buf(buf, 0, SvUVX(sv), 1, &ebuf);
3082 ptr = uiv_2buf(buf, SvIVX(sv), 0, 0, &ebuf);
3083 SvGROW(sv, (STRLEN)(ebuf - ptr + 1)); /* inlined from sv_setpvn */
3084 Move(ptr,SvPVX(sv),ebuf - ptr,char);
3085 SvCUR_set(sv, ebuf - ptr);
3095 else if (SvNOKp(sv)) {
3096 if (SvTYPE(sv) < SVt_PVNV)
3097 sv_upgrade(sv, SVt_PVNV);
3098 /* The +20 is pure guesswork. Configure test needed. --jhi */
3099 SvGROW(sv, NV_DIG + 20);
3101 olderrno = errno; /* some Xenix systems wipe out errno here */
3103 if (SvNVX(sv) == 0.0)
3104 (void)strcpy(s,"0");
3108 Gconvert(SvNVX(sv), NV_DIG, 0, s);
3111 #ifdef FIXNEGATIVEZERO
3112 if (*s == '-' && s[1] == '0' && !s[2])
3122 if (ckWARN(WARN_UNINITIALIZED)
3123 && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP))
3126 if (SvTYPE(sv) < SVt_PV)
3127 /* Typically the caller expects that sv_any is not NULL now. */
3128 sv_upgrade(sv, SVt_PV);
3131 *lp = s - SvPVX(sv);
3134 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2pv(%s)\n",
3135 PTR2UV(sv),SvPVX(sv)));
3139 if (SvROK(sv)) { /* XXX Skip this when sv_pvn_force calls */
3140 /* Sneaky stuff here */
3144 tsv = newSVpv(tmpbuf, 0);
3160 len = strlen(tmpbuf);
3162 #ifdef FIXNEGATIVEZERO
3163 if (len == 2 && t[0] == '-' && t[1] == '0') {
3168 (void)SvUPGRADE(sv, SVt_PV);
3170 s = SvGROW(sv, len + 1);
3179 =for apidoc sv_copypv
3181 Copies a stringified representation of the source SV into the
3182 destination SV. Automatically performs any necessary mg_get and
3183 coercion of numeric values into strings. Guaranteed to preserve
3184 UTF-8 flag even from overloaded objects. Similar in nature to
3185 sv_2pv[_flags] but operates directly on an SV instead of just the
3186 string. Mostly uses sv_2pv_flags to do its work, except when that
3187 would lose the UTF-8'ness of the PV.
3193 Perl_sv_copypv(pTHX_ SV *dsv, register SV *ssv)
3197 if ( SvTHINKFIRST(ssv) && SvROK(ssv) && SvAMAGIC(ssv) &&
3198 (tmpsv = AMG_CALLun(ssv,string))) {
3199 if (SvTYPE(tmpsv) != SVt_RV || (SvRV(tmpsv) != SvRV(ssv))) {
3204 tmpsv = sv_newmortal();
3210 sv_setpvn(tmpsv,s,len);
3220 =for apidoc sv_2pvbyte_nolen
3222 Return a pointer to the byte-encoded representation of the SV.
3223 May cause the SV to be downgraded from UTF8 as a side-effect.
3225 Usually accessed via the C<SvPVbyte_nolen> macro.
3231 Perl_sv_2pvbyte_nolen(pTHX_ register SV *sv)
3234 return sv_2pvbyte(sv, &n_a);
3238 =for apidoc sv_2pvbyte
3240 Return a pointer to the byte-encoded representation of the SV, and set *lp
3241 to its length. May cause the SV to be downgraded from UTF8 as a
3244 Usually accessed via the C<SvPVbyte> macro.
3250 Perl_sv_2pvbyte(pTHX_ register SV *sv, STRLEN *lp)
3252 sv_utf8_downgrade(sv,0);
3253 return SvPV(sv,*lp);
3257 =for apidoc sv_2pvutf8_nolen
3259 Return a pointer to the UTF8-encoded representation of the SV.
3260 May cause the SV to be upgraded to UTF8 as a side-effect.
3262 Usually accessed via the C<SvPVutf8_nolen> macro.
3268 Perl_sv_2pvutf8_nolen(pTHX_ register SV *sv)
3271 return sv_2pvutf8(sv, &n_a);
3275 =for apidoc sv_2pvutf8
3277 Return a pointer to the UTF8-encoded representation of the SV, and set *lp
3278 to its length. May cause the SV to be upgraded to UTF8 as a side-effect.
3280 Usually accessed via the C<SvPVutf8> macro.
3286 Perl_sv_2pvutf8(pTHX_ register SV *sv, STRLEN *lp)
3288 sv_utf8_upgrade(sv);
3289 return SvPV(sv,*lp);
3293 =for apidoc sv_2bool
3295 This function is only called on magical items, and is only used by
3296 sv_true() or its macro equivalent.
3302 Perl_sv_2bool(pTHX_ register SV *sv)
3311 if (SvAMAGIC(sv) && (tmpsv=AMG_CALLun(sv,bool_)) &&
3312 (!SvROK(tmpsv) || (SvRV(tmpsv) != SvRV(sv))))
3313 return (bool)SvTRUE(tmpsv);
3314 return SvRV(sv) != 0;
3317 register XPV* Xpvtmp;
3318 if ((Xpvtmp = (XPV*)SvANY(sv)) &&
3319 (*Xpvtmp->xpv_pv > '0' ||
3320 Xpvtmp->xpv_cur > 1 ||
3321 (Xpvtmp->xpv_cur && *Xpvtmp->xpv_pv != '0')))
3328 return SvIVX(sv) != 0;
3331 return SvNVX(sv) != 0.0;
3339 =for apidoc sv_utf8_upgrade
3341 Convert the PV of an SV to its UTF8-encoded form.
3342 Forces the SV to string form if it is not already.
3343 Always sets the SvUTF8 flag to avoid future validity checks even
3344 if all the bytes have hibit clear.
3346 This is not as a general purpose byte encoding to Unicode interface:
3347 use the Encode extension for that.
3349 =for apidoc sv_utf8_upgrade_flags
3351 Convert the PV of an SV to its UTF8-encoded form.
3352 Forces the SV to string form if it is not already.
3353 Always sets the SvUTF8 flag to avoid future validity checks even
3354 if all the bytes have hibit clear. If C<flags> has C<SV_GMAGIC> bit set,
3355 will C<mg_get> on C<sv> if appropriate, else not. C<sv_utf8_upgrade> and
3356 C<sv_utf8_upgrade_nomg> are implemented in terms of this function.
3358 This is not as a general purpose byte encoding to Unicode interface:
3359 use the Encode extension for that.
3365 Perl_sv_utf8_upgrade_flags(pTHX_ register SV *sv, I32 flags)
3375 (void) sv_2pv_flags(sv,&len, flags);
3383 if (SvREADONLY(sv) && SvFAKE(sv)) {
3384 sv_force_normal(sv);
3388 sv_recode_to_utf8(sv, PL_encoding);
3389 else { /* Assume Latin-1/EBCDIC */
3390 /* This function could be much more efficient if we
3391 * had a FLAG in SVs to signal if there are any hibit
3392 * chars in the PV. Given that there isn't such a flag
3393 * make the loop as fast as possible. */
3394 s = (U8 *) SvPVX(sv);
3395 e = (U8 *) SvEND(sv);
3399 if ((hibit = !NATIVE_IS_INVARIANT(ch)))
3405 len = SvCUR(sv) + 1; /* Plus the \0 */
3406 SvPVX(sv) = (char*)bytes_to_utf8((U8*)s, &len);
3407 SvCUR(sv) = len - 1;
3409 Safefree(s); /* No longer using what was there before. */
3410 SvLEN(sv) = len; /* No longer know the real size. */
3412 /* Mark as UTF-8 even if no hibit - saves scanning loop */
3419 =for apidoc sv_utf8_downgrade
3421 Attempt to convert the PV of an SV from UTF8-encoded to byte encoding.
3422 This may not be possible if the PV contains non-byte encoding characters;
3423 if this is the case, either returns false or, if C<fail_ok> is not
3426 This is not as a general purpose Unicode to byte encoding interface:
3427 use the Encode extension for that.
3433 Perl_sv_utf8_downgrade(pTHX_ register SV* sv, bool fail_ok)
3435 if (SvPOK(sv) && SvUTF8(sv)) {
3440 if (SvREADONLY(sv) && SvFAKE(sv))
3441 sv_force_normal(sv);
3442 s = (U8 *) SvPV(sv, len);
3443 if (!utf8_to_bytes(s, &len)) {
3448 Perl_croak(aTHX_ "Wide character in %s",
3451 Perl_croak(aTHX_ "Wide character");
3462 =for apidoc sv_utf8_encode
3464 Convert the PV of an SV to UTF8-encoded, but then turn off the C<SvUTF8>
3465 flag so that it looks like octets again. Used as a building block
3466 for encode_utf8 in Encode.xs
3472 Perl_sv_utf8_encode(pTHX_ register SV *sv)
3474 (void) sv_utf8_upgrade(sv);
3479 =for apidoc sv_utf8_decode
3481 Convert the octets in the PV from UTF-8 to chars. Scan for validity and then
3482 turn off SvUTF8 if needed so that we see characters. Used as a building block
3483 for decode_utf8 in Encode.xs
3489 Perl_sv_utf8_decode(pTHX_ register SV *sv)
3495 /* The octets may have got themselves encoded - get them back as
3498 if (!sv_utf8_downgrade(sv, TRUE))
3501 /* it is actually just a matter of turning the utf8 flag on, but
3502 * we want to make sure everything inside is valid utf8 first.
3504 c = (U8 *) SvPVX(sv);
3505 if (!is_utf8_string(c, SvCUR(sv)+1))
3507 e = (U8 *) SvEND(sv);
3510 if (!UTF8_IS_INVARIANT(ch)) {
3520 =for apidoc sv_setsv
3522 Copies the contents of the source SV C<ssv> into the destination SV
3523 C<dsv>. The source SV may be destroyed if it is mortal, so don't use this
3524 function if the source SV needs to be reused. Does not handle 'set' magic.
3525 Loosely speaking, it performs a copy-by-value, obliterating any previous
3526 content of the destination.
3528 You probably want to use one of the assortment of wrappers, such as
3529 C<SvSetSV>, C<SvSetSV_nosteal>, C<SvSetMagicSV> and
3530 C<SvSetMagicSV_nosteal>.
3532 =for apidoc sv_setsv_flags
3534 Copies the contents of the source SV C<ssv> into the destination SV
3535 C<dsv>. The source SV may be destroyed if it is mortal, so don't use this
3536 function if the source SV needs to be reused. Does not handle 'set' magic.
3537 Loosely speaking, it performs a copy-by-value, obliterating any previous
3538 content of the destination.
3539 If the C<flags> parameter has the C<SV_GMAGIC> bit set, will C<mg_get> on
3540 C<ssv> if appropriate, else not. C<sv_setsv> and C<sv_setsv_nomg> are
3541 implemented in terms of this function.
3543 You probably want to use one of the assortment of wrappers, such as
3544 C<SvSetSV>, C<SvSetSV_nosteal>, C<SvSetMagicSV> and
3545 C<SvSetMagicSV_nosteal>.
3547 This is the primary function for copying scalars, and most other
3548 copy-ish functions and macros use this underneath.
3554 Perl_sv_setsv_flags(pTHX_ SV *dstr, register SV *sstr, I32 flags)
3556 register U32 sflags;
3562 SV_CHECK_THINKFIRST(dstr);
3564 sstr = &PL_sv_undef;
3565 stype = SvTYPE(sstr);
3566 dtype = SvTYPE(dstr);
3570 /* There's a lot of redundancy below but we're going for speed here */
3575 if (dtype != SVt_PVGV) {
3576 (void)SvOK_off(dstr);
3584 sv_upgrade(dstr, SVt_IV);
3587 sv_upgrade(dstr, SVt_PVNV);
3591 sv_upgrade(dstr, SVt_PVIV);
3594 (void)SvIOK_only(dstr);
3595 SvIVX(dstr) = SvIVX(sstr);
3598 if (SvTAINTED(sstr))
3609 sv_upgrade(dstr, SVt_NV);
3614 sv_upgrade(dstr, SVt_PVNV);
3617 SvNVX(dstr) = SvNVX(sstr);
3618 (void)SvNOK_only(dstr);
3619 if (SvTAINTED(sstr))
3627 sv_upgrade(dstr, SVt_RV);
3628 else if (dtype == SVt_PVGV &&
3629 SvTYPE(SvRV(sstr)) == SVt_PVGV) {
3632 if (GvIMPORTED(dstr) != GVf_IMPORTED
3633 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3635 GvIMPORTED_on(dstr);
3646 sv_upgrade(dstr, SVt_PV);
3649 if (dtype < SVt_PVIV)
3650 sv_upgrade(dstr, SVt_PVIV);
3653 if (dtype < SVt_PVNV)
3654 sv_upgrade(dstr, SVt_PVNV);
3661 Perl_croak(aTHX_ "Bizarre copy of %s in %s", sv_reftype(sstr, 0),
3664 Perl_croak(aTHX_ "Bizarre copy of %s", sv_reftype(sstr, 0));
3668 if (dtype <= SVt_PVGV) {
3670 if (dtype != SVt_PVGV) {
3671 char *name = GvNAME(sstr);
3672 STRLEN len = GvNAMELEN(sstr);
3673 sv_upgrade(dstr, SVt_PVGV);
3674 sv_magic(dstr, dstr, PERL_MAGIC_glob, Nullch, 0);
3675 GvSTASH(dstr) = (HV*)SvREFCNT_inc(GvSTASH(sstr));
3676 GvNAME(dstr) = savepvn(name, len);
3677 GvNAMELEN(dstr) = len;
3678 SvFAKE_on(dstr); /* can coerce to non-glob */
3680 /* ahem, death to those who redefine active sort subs */
3681 else if (PL_curstackinfo->si_type == PERLSI_SORT
3682 && GvCV(dstr) && PL_sortcop == CvSTART(GvCV(dstr)))
3683 Perl_croak(aTHX_ "Can't redefine active sort subroutine %s",
3686 #ifdef GV_UNIQUE_CHECK
3687 if (GvUNIQUE((GV*)dstr)) {
3688 Perl_croak(aTHX_ PL_no_modify);
3692 (void)SvOK_off(dstr);
3693 GvINTRO_off(dstr); /* one-shot flag */
3695 GvGP(dstr) = gp_ref(GvGP(sstr));
3696 if (SvTAINTED(sstr))
3698 if (GvIMPORTED(dstr) != GVf_IMPORTED
3699 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3701 GvIMPORTED_on(dstr);
3709 if (SvGMAGICAL(sstr) && (flags & SV_GMAGIC)) {
3711 if ((int)SvTYPE(sstr) != stype) {
3712 stype = SvTYPE(sstr);
3713 if (stype == SVt_PVGV && dtype <= SVt_PVGV)
3717 if (stype == SVt_PVLV)
3718 (void)SvUPGRADE(dstr, SVt_PVNV);
3720 (void)SvUPGRADE(dstr, (U32)stype);
3723 sflags = SvFLAGS(sstr);
3725 if (sflags & SVf_ROK) {
3726 if (dtype >= SVt_PV) {
3727 if (dtype == SVt_PVGV) {
3728 SV *sref = SvREFCNT_inc(SvRV(sstr));
3730 int intro = GvINTRO(dstr);
3732 #ifdef GV_UNIQUE_CHECK
3733 if (GvUNIQUE((GV*)dstr)) {
3734 Perl_croak(aTHX_ PL_no_modify);
3739 GvINTRO_off(dstr); /* one-shot flag */
3740 GvLINE(dstr) = CopLINE(PL_curcop);
3741 GvEGV(dstr) = (GV*)dstr;
3744 switch (SvTYPE(sref)) {
3747 SAVESPTR(GvAV(dstr));
3749 dref = (SV*)GvAV(dstr);
3750 GvAV(dstr) = (AV*)sref;
3751 if (!GvIMPORTED_AV(dstr)
3752 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3754 GvIMPORTED_AV_on(dstr);
3759 SAVESPTR(GvHV(dstr));
3761 dref = (SV*)GvHV(dstr);
3762 GvHV(dstr) = (HV*)sref;
3763 if (!GvIMPORTED_HV(dstr)
3764 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3766 GvIMPORTED_HV_on(dstr);
3771 if (GvCVGEN(dstr) && GvCV(dstr) != (CV*)sref) {
3772 SvREFCNT_dec(GvCV(dstr));
3773 GvCV(dstr) = Nullcv;
3774 GvCVGEN(dstr) = 0; /* Switch off cacheness. */
3775 PL_sub_generation++;
3777 SAVESPTR(GvCV(dstr));
3780 dref = (SV*)GvCV(dstr);
3781 if (GvCV(dstr) != (CV*)sref) {
3782 CV* cv = GvCV(dstr);
3784 if (!GvCVGEN((GV*)dstr) &&
3785 (CvROOT(cv) || CvXSUB(cv)))
3787 /* ahem, death to those who redefine
3788 * active sort subs */
3789 if (PL_curstackinfo->si_type == PERLSI_SORT &&
3790 PL_sortcop == CvSTART(cv))
3792 "Can't redefine active sort subroutine %s",
3793 GvENAME((GV*)dstr));
3794 /* Redefining a sub - warning is mandatory if
3795 it was a const and its value changed. */
3796 if (ckWARN(WARN_REDEFINE)
3798 && (!CvCONST((CV*)sref)
3799 || sv_cmp(cv_const_sv(cv),
3800 cv_const_sv((CV*)sref)))))
3802 Perl_warner(aTHX_ packWARN(WARN_REDEFINE),
3804 ? "Constant subroutine %s::%s redefined"
3805 : "Subroutine %s::%s redefined",
3806 HvNAME(GvSTASH((GV*)dstr)),
3807 GvENAME((GV*)dstr));
3811 cv_ckproto(cv, (GV*)dstr,
3812 SvPOK(sref) ? SvPVX(sref) : Nullch);
3814 GvCV(dstr) = (CV*)sref;
3815 GvCVGEN(dstr) = 0; /* Switch off cacheness. */
3816 GvASSUMECV_on(dstr);
3817 PL_sub_generation++;
3819 if (!GvIMPORTED_CV(dstr)
3820 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3822 GvIMPORTED_CV_on(dstr);
3827 SAVESPTR(GvIOp(dstr));
3829 dref = (SV*)GvIOp(dstr);
3830 GvIOp(dstr) = (IO*)sref;
3834 SAVESPTR(GvFORM(dstr));
3836 dref = (SV*)GvFORM(dstr);
3837 GvFORM(dstr) = (CV*)sref;
3841 SAVESPTR(GvSV(dstr));
3843 dref = (SV*)GvSV(dstr);
3845 if (!GvIMPORTED_SV(dstr)
3846 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3848 GvIMPORTED_SV_on(dstr);
3856 if (SvTAINTED(sstr))
3861 (void)SvOOK_off(dstr); /* backoff */
3863 Safefree(SvPVX(dstr));
3864 SvLEN(dstr)=SvCUR(dstr)=0;
3867 (void)SvOK_off(dstr);
3868 SvRV(dstr) = SvREFCNT_inc(SvRV(sstr));
3870 if (sflags & SVp_NOK) {
3872 /* Only set the public OK flag if the source has public OK. */
3873 if (sflags & SVf_NOK)
3874 SvFLAGS(dstr) |= SVf_NOK;
3875 SvNVX(dstr) = SvNVX(sstr);
3877 if (sflags & SVp_IOK) {
3878 (void)SvIOKp_on(dstr);
3879 if (sflags & SVf_IOK)
3880 SvFLAGS(dstr) |= SVf_IOK;
3881 if (sflags & SVf_IVisUV)
3883 SvIVX(dstr) = SvIVX(sstr);
3885 if (SvAMAGIC(sstr)) {
3889 else if (sflags & SVp_POK) {
3892 * Check to see if we can just swipe the string. If so, it's a
3893 * possible small lose on short strings, but a big win on long ones.
3894 * It might even be a win on short strings if SvPVX(dstr)
3895 * has to be allocated and SvPVX(sstr) has to be freed.
3898 if (SvTEMP(sstr) && /* slated for free anyway? */
3899 SvREFCNT(sstr) == 1 && /* and no other references to it? */
3900 !(sflags & SVf_OOK) && /* and not involved in OOK hack? */
3901 SvLEN(sstr) && /* and really is a string */
3902 /* and won't be needed again, potentially */
3903 !(PL_op && PL_op->op_type == OP_AASSIGN))
3905 if (SvPVX(dstr)) { /* we know that dtype >= SVt_PV */
3907 SvFLAGS(dstr) &= ~SVf_OOK;
3908 Safefree(SvPVX(dstr) - SvIVX(dstr));
3910 else if (SvLEN(dstr))
3911 Safefree(SvPVX(dstr));
3913 (void)SvPOK_only(dstr);
3914 SvPV_set(dstr, SvPVX(sstr));
3915 SvLEN_set(dstr, SvLEN(sstr));
3916 SvCUR_set(dstr, SvCUR(sstr));
3919 (void)SvOK_off(sstr); /* NOTE: nukes most SvFLAGS on sstr */
3920 SvPV_set(sstr, Nullch);
3925 else { /* have to copy actual string */
3926 STRLEN len = SvCUR(sstr);
3927 SvGROW(dstr, len + 1); /* inlined from sv_setpvn */
3928 Move(SvPVX(sstr),SvPVX(dstr),len,char);
3929 SvCUR_set(dstr, len);
3930 *SvEND(dstr) = '\0';
3931 (void)SvPOK_only(dstr);
3933 if (sflags & SVf_UTF8)
3936 if (sflags & SVp_NOK) {
3938 if (sflags & SVf_NOK)
3939 SvFLAGS(dstr) |= SVf_NOK;
3940 SvNVX(dstr) = SvNVX(sstr);
3942 if (sflags & SVp_IOK) {
3943 (void)SvIOKp_on(dstr);
3944 if (sflags & SVf_IOK)
3945 SvFLAGS(dstr) |= SVf_IOK;
3946 if (sflags & SVf_IVisUV)
3948 SvIVX(dstr) = SvIVX(sstr);
3951 else if (sflags & SVp_IOK) {
3952 if (sflags & SVf_IOK)
3953 (void)SvIOK_only(dstr);
3955 (void)SvOK_off(dstr);
3956 (void)SvIOKp_on(dstr);
3958 /* XXXX Do we want to set IsUV for IV(ROK)? Be extra safe... */
3959 if (sflags & SVf_IVisUV)
3961 SvIVX(dstr) = SvIVX(sstr);
3962 if (sflags & SVp_NOK) {
3963 if (sflags & SVf_NOK)
3964 (void)SvNOK_on(dstr);
3966 (void)SvNOKp_on(dstr);
3967 SvNVX(dstr) = SvNVX(sstr);
3970 else if (sflags & SVp_NOK) {
3971 if (sflags & SVf_NOK)
3972 (void)SvNOK_only(dstr);
3974 (void)SvOK_off(dstr);
3977 SvNVX(dstr) = SvNVX(sstr);
3980 if (dtype == SVt_PVGV) {
3981 if (ckWARN(WARN_MISC))
3982 Perl_warner(aTHX_ packWARN(WARN_MISC), "Undefined value assigned to typeglob");
3985 (void)SvOK_off(dstr);
3987 if (SvTAINTED(sstr))
3992 =for apidoc sv_setsv_mg
3994 Like C<sv_setsv>, but also handles 'set' magic.
4000 Perl_sv_setsv_mg(pTHX_ SV *dstr, register SV *sstr)
4002 sv_setsv(dstr,sstr);
4007 =for apidoc sv_setpvn
4009 Copies a string into an SV. The C<len> parameter indicates the number of
4010 bytes to be copied. Does not handle 'set' magic. See C<sv_setpvn_mg>.
4016 Perl_sv_setpvn(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
4018 register char *dptr;
4020 SV_CHECK_THINKFIRST(sv);
4026 /* len is STRLEN which is unsigned, need to copy to signed */
4029 Perl_croak(aTHX_ "panic: sv_setpvn called with negative strlen");
4031 (void)SvUPGRADE(sv, SVt_PV);
4033 SvGROW(sv, len + 1);
4035 Move(ptr,dptr,len,char);
4038 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4043 =for apidoc sv_setpvn_mg
4045 Like C<sv_setpvn>, but also handles 'set' magic.
4051 Perl_sv_setpvn_mg(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
4053 sv_setpvn(sv,ptr,len);
4058 =for apidoc sv_setpv
4060 Copies a string into an SV. The string must be null-terminated. Does not
4061 handle 'set' magic. See C<sv_setpv_mg>.
4067 Perl_sv_setpv(pTHX_ register SV *sv, register const char *ptr)
4069 register STRLEN len;
4071 SV_CHECK_THINKFIRST(sv);
4077 (void)SvUPGRADE(sv, SVt_PV);
4079 SvGROW(sv, len + 1);
4080 Move(ptr,SvPVX(sv),len+1,char);
4082 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4087 =for apidoc sv_setpv_mg
4089 Like C<sv_setpv>, but also handles 'set' magic.
4095 Perl_sv_setpv_mg(pTHX_ register SV *sv, register const char *ptr)
4102 =for apidoc sv_usepvn
4104 Tells an SV to use C<ptr> to find its string value. Normally the string is
4105 stored inside the SV but sv_usepvn allows the SV to use an outside string.
4106 The C<ptr> should point to memory that was allocated by C<malloc>. The
4107 string length, C<len>, must be supplied. This function will realloc the
4108 memory pointed to by C<ptr>, so that pointer should not be freed or used by
4109 the programmer after giving it to sv_usepvn. Does not handle 'set' magic.
4110 See C<sv_usepvn_mg>.
4116 Perl_sv_usepvn(pTHX_ register SV *sv, register char *ptr, register STRLEN len)
4118 SV_CHECK_THINKFIRST(sv);
4119 (void)SvUPGRADE(sv, SVt_PV);
4124 (void)SvOOK_off(sv);
4125 if (SvPVX(sv) && SvLEN(sv))
4126 Safefree(SvPVX(sv));
4127 Renew(ptr, len+1, char);
4130 SvLEN_set(sv, len+1);
4132 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4137 =for apidoc sv_usepvn_mg
4139 Like C<sv_usepvn>, but also handles 'set' magic.
4145 Perl_sv_usepvn_mg(pTHX_ register SV *sv, register char *ptr, register STRLEN len)
4147 sv_usepvn(sv,ptr,len);
4152 =for apidoc sv_force_normal_flags
4154 Undo various types of fakery on an SV: if the PV is a shared string, make
4155 a private copy; if we're a ref, stop refing; if we're a glob, downgrade to
4156 an xpvmg. The C<flags> parameter gets passed to C<sv_unref_flags()>
4157 when unrefing. C<sv_force_normal> calls this function with flags set to 0.
4163 Perl_sv_force_normal_flags(pTHX_ register SV *sv, U32 flags)
4165 if (SvREADONLY(sv)) {
4167 char *pvx = SvPVX(sv);
4168 STRLEN len = SvCUR(sv);
4169 U32 hash = SvUVX(sv);
4170 SvGROW(sv, len + 1);
4171 Move(pvx,SvPVX(sv),len,char);
4175 unsharepvn(pvx, SvUTF8(sv) ? -(I32)len : len, hash);
4177 else if (PL_curcop != &PL_compiling)
4178 Perl_croak(aTHX_ PL_no_modify);
4181 sv_unref_flags(sv, flags);
4182 else if (SvFAKE(sv) && SvTYPE(sv) == SVt_PVGV)
4187 =for apidoc sv_force_normal
4189 Undo various types of fakery on an SV: if the PV is a shared string, make
4190 a private copy; if we're a ref, stop refing; if we're a glob, downgrade to
4191 an xpvmg. See also C<sv_force_normal_flags>.
4197 Perl_sv_force_normal(pTHX_ register SV *sv)
4199 sv_force_normal_flags(sv, 0);
4205 Efficient removal of characters from the beginning of the string buffer.
4206 SvPOK(sv) must be true and the C<ptr> must be a pointer to somewhere inside
4207 the string buffer. The C<ptr> becomes the first character of the adjusted
4208 string. Uses the "OOK hack".
4214 Perl_sv_chop(pTHX_ register SV *sv, register char *ptr)
4216 register STRLEN delta;
4218 if (!ptr || !SvPOKp(sv))
4220 SV_CHECK_THINKFIRST(sv);
4221 if (SvTYPE(sv) < SVt_PVIV)
4222 sv_upgrade(sv,SVt_PVIV);
4225 if (!SvLEN(sv)) { /* make copy of shared string */
4226 char *pvx = SvPVX(sv);
4227 STRLEN len = SvCUR(sv);
4228 SvGROW(sv, len + 1);
4229 Move(pvx,SvPVX(sv),len,char);
4233 SvFLAGS(sv) |= SVf_OOK;
4235 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVp_IOK|SVp_NOK|SVf_IVisUV);
4236 delta = ptr - SvPVX(sv);
4244 =for apidoc sv_catpvn
4246 Concatenates the string onto the end of the string which is in the SV. The
4247 C<len> indicates number of bytes to copy. If the SV has the UTF8
4248 status set, then the bytes appended should be valid UTF8.
4249 Handles 'get' magic, but not 'set' magic. See C<sv_catpvn_mg>.
4251 =for apidoc sv_catpvn_flags
4253 Concatenates the string onto the end of the string which is in the SV. The
4254 C<len> indicates number of bytes to copy. If the SV has the UTF8
4255 status set, then the bytes appended should be valid UTF8.
4256 If C<flags> has C<SV_GMAGIC> bit set, will C<mg_get> on C<dsv> if
4257 appropriate, else not. C<sv_catpvn> and C<sv_catpvn_nomg> are implemented
4258 in terms of this function.
4264 Perl_sv_catpvn_flags(pTHX_ register SV *dsv, register const char *sstr, register STRLEN slen, I32 flags)
4269 dstr = SvPV_force_flags(dsv, dlen, flags);
4270 SvGROW(dsv, dlen + slen + 1);
4273 Move(sstr, SvPVX(dsv) + dlen, slen, char);
4276 (void)SvPOK_only_UTF8(dsv); /* validate pointer */
4281 =for apidoc sv_catpvn_mg
4283 Like C<sv_catpvn>, but also handles 'set' magic.
4289 Perl_sv_catpvn_mg(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
4291 sv_catpvn(sv,ptr,len);
4296 =for apidoc sv_catsv
4298 Concatenates the string from SV C<ssv> onto the end of the string in
4299 SV C<dsv>. Modifies C<dsv> but not C<ssv>. Handles 'get' magic, but
4300 not 'set' magic. See C<sv_catsv_mg>.
4302 =for apidoc sv_catsv_flags
4304 Concatenates the string from SV C<ssv> onto the end of the string in
4305 SV C<dsv>. Modifies C<dsv> but not C<ssv>. If C<flags> has C<SV_GMAGIC>
4306 bit set, will C<mg_get> on the SVs if appropriate, else not. C<sv_catsv>
4307 and C<sv_catsv_nomg> are implemented in terms of this function.
4312 Perl_sv_catsv_flags(pTHX_ SV *dsv, register SV *ssv, I32 flags)
4318 if ((spv = SvPV(ssv, slen))) {
4319 /* sutf8 and dutf8 were type bool, but under USE_ITHREADS,
4320 gcc version 2.95.2 20000220 (Debian GNU/Linux) for
4321 Linux xxx 2.2.17 on sparc64 with gcc -O2, we erroneously
4322 get dutf8 = 0x20000000, (i.e. SVf_UTF8) even though
4323 dsv->sv_flags doesn't have that bit set.
4324 Andy Dougherty 12 Oct 2001
4326 I32 sutf8 = DO_UTF8(ssv);
4329 if (SvGMAGICAL(dsv) && (flags & SV_GMAGIC))
4331 dutf8 = DO_UTF8(dsv);
4333 if (dutf8 != sutf8) {
4335 /* Not modifying source SV, so taking a temporary copy. */
4336 SV* csv = sv_2mortal(newSVpvn(spv, slen));
4338 sv_utf8_upgrade(csv);
4339 spv = SvPV(csv, slen);
4342 sv_utf8_upgrade_nomg(dsv);
4344 sv_catpvn_nomg(dsv, spv, slen);
4349 =for apidoc sv_catsv_mg
4351 Like C<sv_catsv>, but also handles 'set' magic.
4357 Perl_sv_catsv_mg(pTHX_ SV *dsv, register SV *ssv)
4364 =for apidoc sv_catpv
4366 Concatenates the string onto the end of the string which is in the SV.
4367 If the SV has the UTF8 status set, then the bytes appended should be
4368 valid UTF8. Handles 'get' magic, but not 'set' magic. See C<sv_catpv_mg>.
4373 Perl_sv_catpv(pTHX_ register SV *sv, register const char *ptr)
4375 register STRLEN len;
4381 junk = SvPV_force(sv, tlen);
4383 SvGROW(sv, tlen + len + 1);
4386 Move(ptr,SvPVX(sv)+tlen,len+1,char);
4388 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4393 =for apidoc sv_catpv_mg
4395 Like C<sv_catpv>, but also handles 'set' magic.
4401 Perl_sv_catpv_mg(pTHX_ register SV *sv, register const char *ptr)
4410 Create a new null SV, or if len > 0, create a new empty SVt_PV type SV
4411 with an initial PV allocation of len+1. Normally accessed via the C<NEWSV>
4418 Perl_newSV(pTHX_ STRLEN len)
4424 sv_upgrade(sv, SVt_PV);
4425 SvGROW(sv, len + 1);
4430 =for apidoc sv_magicext
4432 Adds magic to an SV, upgrading it if necessary. Applies the
4433 supplied vtable and returns pointer to the magic added.
4435 Note that sv_magicext will allow things that sv_magic will not.
4436 In particular you can add magic to SvREADONLY SVs and and more than
4437 one instance of the same 'how'
4439 I C<namelen> is greater then zero then a savepvn() I<copy> of C<name> is stored,
4440 if C<namelen> is zero then C<name> is stored as-is and - as another special
4441 case - if C<(name && namelen == HEf_SVKEY)> then C<name> is assumed to contain
4442 an C<SV*> and has its REFCNT incremented
4444 (This is now used as a subroutine by sv_magic.)
4449 Perl_sv_magicext(pTHX_ SV* sv, SV* obj, int how, MGVTBL *vtable,
4450 const char* name, I32 namlen)
4454 if (SvTYPE(sv) < SVt_PVMG) {
4455 (void)SvUPGRADE(sv, SVt_PVMG);
4457 Newz(702,mg, 1, MAGIC);
4458 mg->mg_moremagic = SvMAGIC(sv);
4461 /* Some magic sontains a reference loop, where the sv and object refer to
4462 each other. To prevent a reference loop that would prevent such
4463 objects being freed, we look for such loops and if we find one we
4464 avoid incrementing the object refcount.
4466 Note we cannot do this to avoid self-tie loops as intervening RV must
4467 have its REFCNT incremented to keep it in existence - instead we could
4468 special case them in sv_free() -- NI-S
4471 if (!obj || obj == sv ||
4472 how == PERL_MAGIC_arylen ||
4473 how == PERL_MAGIC_qr ||
4474 (SvTYPE(obj) == SVt_PVGV &&
4475 (GvSV(obj) == sv || GvHV(obj) == (HV*)sv || GvAV(obj) == (AV*)sv ||
4476 GvCV(obj) == (CV*)sv || GvIOp(obj) == (IO*)sv ||
4477 GvFORM(obj) == (CV*)sv)))
4482 mg->mg_obj = SvREFCNT_inc(obj);
4483 mg->mg_flags |= MGf_REFCOUNTED;
4486 mg->mg_len = namlen;
4489 mg->mg_ptr = savepvn(name, namlen);
4490 else if (namlen == HEf_SVKEY)
4491 mg->mg_ptr = (char*)SvREFCNT_inc((SV*)name);
4493 mg->mg_ptr = (char *) name;
4495 mg->mg_virtual = vtable;
4499 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
4504 =for apidoc sv_magic
4506 Adds magic to an SV. First upgrades C<sv> to type C<SVt_PVMG> if necessary,
4507 then adds a new magic item of type C<how> to the head of the magic list.
4513 Perl_sv_magic(pTHX_ register SV *sv, SV *obj, int how, const char *name, I32 namlen)
4518 if (SvREADONLY(sv)) {
4519 if (PL_curcop != &PL_compiling
4520 && how != PERL_MAGIC_regex_global
4521 && how != PERL_MAGIC_bm
4522 && how != PERL_MAGIC_fm
4523 && how != PERL_MAGIC_sv
4526 Perl_croak(aTHX_ PL_no_modify);
4529 if (SvMAGICAL(sv) || (how == PERL_MAGIC_taint && SvTYPE(sv) >= SVt_PVMG)) {
4530 if (SvMAGIC(sv) && (mg = mg_find(sv, how))) {
4531 /* sv_magic() refuses to add a magic of the same 'how' as an
4534 if (how == PERL_MAGIC_taint)
4542 vtable = &PL_vtbl_sv;
4544 case PERL_MAGIC_overload:
4545 vtable = &PL_vtbl_amagic;
4547 case PERL_MAGIC_overload_elem:
4548 vtable = &PL_vtbl_amagicelem;
4550 case PERL_MAGIC_overload_table:
4551 vtable = &PL_vtbl_ovrld;
4554 vtable = &PL_vtbl_bm;
4556 case PERL_MAGIC_regdata:
4557 vtable = &PL_vtbl_regdata;
4559 case PERL_MAGIC_regdatum:
4560 vtable = &PL_vtbl_regdatum;
4562 case PERL_MAGIC_env:
4563 vtable = &PL_vtbl_env;
4566 vtable = &PL_vtbl_fm;
4568 case PERL_MAGIC_envelem:
4569 vtable = &PL_vtbl_envelem;
4571 case PERL_MAGIC_regex_global:
4572 vtable = &PL_vtbl_mglob;
4574 case PERL_MAGIC_isa:
4575 vtable = &PL_vtbl_isa;
4577 case PERL_MAGIC_isaelem:
4578 vtable = &PL_vtbl_isaelem;
4580 case PERL_MAGIC_nkeys:
4581 vtable = &PL_vtbl_nkeys;
4583 case PERL_MAGIC_dbfile:
4586 case PERL_MAGIC_dbline:
4587 vtable = &PL_vtbl_dbline;
4589 #ifdef USE_5005THREADS
4590 case PERL_MAGIC_mutex:
4591 vtable = &PL_vtbl_mutex;
4593 #endif /* USE_5005THREADS */
4594 #ifdef USE_LOCALE_COLLATE
4595 case PERL_MAGIC_collxfrm:
4596 vtable = &PL_vtbl_collxfrm;
4598 #endif /* USE_LOCALE_COLLATE */
4599 case PERL_MAGIC_tied:
4600 vtable = &PL_vtbl_pack;
4602 case PERL_MAGIC_tiedelem:
4603 case PERL_MAGIC_tiedscalar:
4604 vtable = &PL_vtbl_packelem;
4607 vtable = &PL_vtbl_regexp;
4609 case PERL_MAGIC_sig:
4610 vtable = &PL_vtbl_sig;
4612 case PERL_MAGIC_sigelem:
4613 vtable = &PL_vtbl_sigelem;
4615 case PERL_MAGIC_taint:
4616 vtable = &PL_vtbl_taint;
4618 case PERL_MAGIC_uvar:
4619 vtable = &PL_vtbl_uvar;
4621 case PERL_MAGIC_vec:
4622 vtable = &PL_vtbl_vec;
4624 case PERL_MAGIC_substr:
4625 vtable = &PL_vtbl_substr;
4627 case PERL_MAGIC_defelem:
4628 vtable = &PL_vtbl_defelem;
4630 case PERL_MAGIC_glob:
4631 vtable = &PL_vtbl_glob;
4633 case PERL_MAGIC_arylen:
4634 vtable = &PL_vtbl_arylen;
4636 case PERL_MAGIC_pos:
4637 vtable = &PL_vtbl_pos;
4639 case PERL_MAGIC_backref:
4640 vtable = &PL_vtbl_backref;
4642 case PERL_MAGIC_ext:
4643 /* Reserved for use by extensions not perl internals. */
4644 /* Useful for attaching extension internal data to perl vars. */
4645 /* Note that multiple extensions may clash if magical scalars */
4646 /* etc holding private data from one are passed to another. */
4649 Perl_croak(aTHX_ "Don't know how to handle magic of type \\%o", how);
4652 /* Rest of work is done else where */
4653 mg = sv_magicext(sv,obj,how,vtable,name,namlen);
4656 case PERL_MAGIC_taint:
4659 case PERL_MAGIC_ext:
4660 case PERL_MAGIC_dbfile:
4667 =for apidoc sv_unmagic
4669 Removes all magic of type C<type> from an SV.
4675 Perl_sv_unmagic(pTHX_ SV *sv, int type)
4679 if (SvTYPE(sv) < SVt_PVMG || !SvMAGIC(sv))
4682 for (mg = *mgp; mg; mg = *mgp) {
4683 if (mg->mg_type == type) {
4684 MGVTBL* vtbl = mg->mg_virtual;
4685 *mgp = mg->mg_moremagic;
4686 if (vtbl && vtbl->svt_free)
4687 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
4688 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
4690 Safefree(mg->mg_ptr);
4691 else if (mg->mg_len == HEf_SVKEY)
4692 SvREFCNT_dec((SV*)mg->mg_ptr);
4694 if (mg->mg_flags & MGf_REFCOUNTED)
4695 SvREFCNT_dec(mg->mg_obj);
4699 mgp = &mg->mg_moremagic;
4703 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_NOK|SVp_POK)) >> PRIVSHIFT;
4710 =for apidoc sv_rvweaken
4712 Weaken a reference: set the C<SvWEAKREF> flag on this RV; give the
4713 referred-to SV C<PERL_MAGIC_backref> magic if it hasn't already; and
4714 push a back-reference to this RV onto the array of backreferences
4715 associated with that magic.
4721 Perl_sv_rvweaken(pTHX_ SV *sv)
4724 if (!SvOK(sv)) /* let undefs pass */
4727 Perl_croak(aTHX_ "Can't weaken a nonreference");
4728 else if (SvWEAKREF(sv)) {
4729 if (ckWARN(WARN_MISC))
4730 Perl_warner(aTHX_ packWARN(WARN_MISC), "Reference is already weak");
4734 sv_add_backref(tsv, sv);
4740 /* Give tsv backref magic if it hasn't already got it, then push a
4741 * back-reference to sv onto the array associated with the backref magic.
4745 S_sv_add_backref(pTHX_ SV *tsv, SV *sv)
4749 if (SvMAGICAL(tsv) && (mg = mg_find(tsv, PERL_MAGIC_backref)))
4750 av = (AV*)mg->mg_obj;
4753 sv_magic(tsv, (SV*)av, PERL_MAGIC_backref, NULL, 0);
4754 SvREFCNT_dec(av); /* for sv_magic */
4759 /* delete a back-reference to ourselves from the backref magic associated
4760 * with the SV we point to.
4764 S_sv_del_backref(pTHX_ SV *sv)
4771 if (!SvMAGICAL(tsv) || !(mg = mg_find(tsv, PERL_MAGIC_backref)))
4772 Perl_croak(aTHX_ "panic: del_backref");
4773 av = (AV *)mg->mg_obj;
4778 svp[i] = &PL_sv_undef; /* XXX */
4785 =for apidoc sv_insert
4787 Inserts a string at the specified offset/length within the SV. Similar to
4788 the Perl substr() function.
4794 Perl_sv_insert(pTHX_ SV *bigstr, STRLEN offset, STRLEN len, char *little, STRLEN littlelen)
4798 register char *midend;
4799 register char *bigend;
4805 Perl_croak(aTHX_ "Can't modify non-existent substring");
4806 SvPV_force(bigstr, curlen);
4807 (void)SvPOK_only_UTF8(bigstr);
4808 if (offset + len > curlen) {
4809 SvGROW(bigstr, offset+len+1);
4810 Zero(SvPVX(bigstr)+curlen, offset+len-curlen, char);
4811 SvCUR_set(bigstr, offset+len);
4815 i = littlelen - len;
4816 if (i > 0) { /* string might grow */
4817 big = SvGROW(bigstr, SvCUR(bigstr) + i + 1);
4818 mid = big + offset + len;
4819 midend = bigend = big + SvCUR(bigstr);
4822 while (midend > mid) /* shove everything down */
4823 *--bigend = *--midend;
4824 Move(little,big+offset,littlelen,char);
4830 Move(little,SvPVX(bigstr)+offset,len,char);
4835 big = SvPVX(bigstr);
4838 bigend = big + SvCUR(bigstr);
4840 if (midend > bigend)
4841 Perl_croak(aTHX_ "panic: sv_insert");
4843 if (mid - big > bigend - midend) { /* faster to shorten from end */
4845 Move(little, mid, littlelen,char);
4848 i = bigend - midend;
4850 Move(midend, mid, i,char);
4854 SvCUR_set(bigstr, mid - big);
4857 else if ((i = mid - big)) { /* faster from front */
4858 midend -= littlelen;
4860 sv_chop(bigstr,midend-i);
4865 Move(little, mid, littlelen,char);
4867 else if (littlelen) {
4868 midend -= littlelen;
4869 sv_chop(bigstr,midend);
4870 Move(little,midend,littlelen,char);
4873 sv_chop(bigstr,midend);
4879 =for apidoc sv_replace
4881 Make the first argument a copy of the second, then delete the original.
4882 The target SV physically takes over ownership of the body of the source SV
4883 and inherits its flags; however, the target keeps any magic it owns,
4884 and any magic in the source is discarded.
4885 Note that this is a rather specialist SV copying operation; most of the
4886 time you'll want to use C<sv_setsv> or one of its many macro front-ends.
4892 Perl_sv_replace(pTHX_ register SV *sv, register SV *nsv)
4894 U32 refcnt = SvREFCNT(sv);
4895 SV_CHECK_THINKFIRST(sv);
4896 if (SvREFCNT(nsv) != 1 && ckWARN_d(WARN_INTERNAL))
4897 Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Reference miscount in sv_replace()");
4898 if (SvMAGICAL(sv)) {
4902 sv_upgrade(nsv, SVt_PVMG);
4903 SvMAGIC(nsv) = SvMAGIC(sv);
4904 SvFLAGS(nsv) |= SvMAGICAL(sv);
4910 assert(!SvREFCNT(sv));
4911 StructCopy(nsv,sv,SV);
4912 SvREFCNT(sv) = refcnt;
4913 SvFLAGS(nsv) |= SVTYPEMASK; /* Mark as freed */
4918 =for apidoc sv_clear
4920 Clear an SV: call any destructors, free up any memory used by the body,
4921 and free the body itself. The SV's head is I<not> freed, although
4922 its type is set to all 1's so that it won't inadvertently be assumed
4923 to be live during global destruction etc.
4924 This function should only be called when REFCNT is zero. Most of the time
4925 you'll want to call C<sv_free()> (or its macro wrapper C<SvREFCNT_dec>)
4932 Perl_sv_clear(pTHX_ register SV *sv)
4936 assert(SvREFCNT(sv) == 0);
4939 if (PL_defstash) { /* Still have a symbol table? */
4944 Zero(&tmpref, 1, SV);
4945 sv_upgrade(&tmpref, SVt_RV);
4947 SvREADONLY_on(&tmpref); /* DESTROY() could be naughty */
4948 SvREFCNT(&tmpref) = 1;
4951 stash = SvSTASH(sv);
4952 destructor = StashHANDLER(stash,DESTROY);
4955 PUSHSTACKi(PERLSI_DESTROY);
4956 SvRV(&tmpref) = SvREFCNT_inc(sv);
4961 call_sv((SV*)destructor, G_DISCARD|G_EVAL|G_KEEPERR);
4967 } while (SvOBJECT(sv) && SvSTASH(sv) != stash);
4969 del_XRV(SvANY(&tmpref));
4972 if (PL_in_clean_objs)
4973 Perl_croak(aTHX_ "DESTROY created new reference to dead object '%s'",
4975 /* DESTROY gave object new lease on life */
4981 SvREFCNT_dec(SvSTASH(sv)); /* possibly of changed persuasion */
4982 SvOBJECT_off(sv); /* Curse the object. */
4983 if (SvTYPE(sv) != SVt_PVIO)
4984 --PL_sv_objcount; /* XXX Might want something more general */
4987 if (SvTYPE(sv) >= SVt_PVMG) {
4990 if (SvFLAGS(sv) & SVpad_TYPED)
4991 SvREFCNT_dec(SvSTASH(sv));
4994 switch (SvTYPE(sv)) {
4997 IoIFP(sv) != PerlIO_stdin() &&
4998 IoIFP(sv) != PerlIO_stdout() &&
4999 IoIFP(sv) != PerlIO_stderr())
5001 io_close((IO*)sv, FALSE);
5003 if (IoDIRP(sv) && !(IoFLAGS(sv) & IOf_FAKE_DIRP))
5004 PerlDir_close(IoDIRP(sv));
5005 IoDIRP(sv) = (DIR*)NULL;
5006 Safefree(IoTOP_NAME(sv));
5007 Safefree(IoFMT_NAME(sv));
5008 Safefree(IoBOTTOM_NAME(sv));
5023 SvREFCNT_dec(LvTARG(sv));
5027 Safefree(GvNAME(sv));
5028 /* cannot decrease stash refcount yet, as we might recursively delete
5029 ourselves when the refcnt drops to zero. Delay SvREFCNT_dec
5030 of stash until current sv is completely gone.
5031 -- JohnPC, 27 Mar 1998 */
5032 stash = GvSTASH(sv);
5038 (void)SvOOK_off(sv);
5046 SvREFCNT_dec(SvRV(sv));
5048 else if (SvPVX(sv) && SvLEN(sv))
5049 Safefree(SvPVX(sv));
5050 else if (SvPVX(sv) && SvREADONLY(sv) && SvFAKE(sv)) {
5051 unsharepvn(SvPVX(sv),
5052 SvUTF8(sv) ? -(I32)SvCUR(sv) : SvCUR(sv),
5065 switch (SvTYPE(sv)) {
5081 del_XPVIV(SvANY(sv));
5084 del_XPVNV(SvANY(sv));
5087 del_XPVMG(SvANY(sv));
5090 del_XPVLV(SvANY(sv));
5093 del_XPVAV(SvANY(sv));
5096 del_XPVHV(SvANY(sv));
5099 del_XPVCV(SvANY(sv));
5102 del_XPVGV(SvANY(sv));
5103 /* code duplication for increased performance. */
5104 SvFLAGS(sv) &= SVf_BREAK;
5105 SvFLAGS(sv) |= SVTYPEMASK;
5106 /* decrease refcount of the stash that owns this GV, if any */
5108 SvREFCNT_dec(stash);
5109 return; /* not break, SvFLAGS reset already happened */
5111 del_XPVBM(SvANY(sv));
5114 del_XPVFM(SvANY(sv));
5117 del_XPVIO(SvANY(sv));
5120 SvFLAGS(sv) &= SVf_BREAK;
5121 SvFLAGS(sv) |= SVTYPEMASK;
5125 =for apidoc sv_newref
5127 Increment an SV's reference count. Use the C<SvREFCNT_inc()> wrapper
5134 Perl_sv_newref(pTHX_ SV *sv)
5137 ATOMIC_INC(SvREFCNT(sv));
5144 Decrement an SV's reference count, and if it drops to zero, call
5145 C<sv_clear> to invoke destructors and free up any memory used by
5146 the body; finally, deallocate the SV's head itself.
5147 Normally called via a wrapper macro C<SvREFCNT_dec>.
5153 Perl_sv_free(pTHX_ SV *sv)
5155 int refcount_is_zero;
5159 if (SvREFCNT(sv) == 0) {
5160 if (SvFLAGS(sv) & SVf_BREAK)
5161 /* this SV's refcnt has been artificially decremented to
5162 * trigger cleanup */
5164 if (PL_in_clean_all) /* All is fair */
5166 if (SvREADONLY(sv) && SvIMMORTAL(sv)) {
5167 /* make sure SvREFCNT(sv)==0 happens very seldom */
5168 SvREFCNT(sv) = (~(U32)0)/2;
5171 if (ckWARN_d(WARN_INTERNAL))
5172 Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Attempt to free unreferenced scalar");
5175 ATOMIC_DEC_AND_TEST(refcount_is_zero, SvREFCNT(sv));
5176 if (!refcount_is_zero)
5180 if (ckWARN_d(WARN_DEBUGGING))
5181 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
5182 "Attempt to free temp prematurely: SV 0x%"UVxf,
5187 if (SvREADONLY(sv) && SvIMMORTAL(sv)) {
5188 /* make sure SvREFCNT(sv)==0 happens very seldom */
5189 SvREFCNT(sv) = (~(U32)0)/2;
5200 Returns the length of the string in the SV. Handles magic and type
5201 coercion. See also C<SvCUR>, which gives raw access to the xpv_cur slot.
5207 Perl_sv_len(pTHX_ register SV *sv)
5215 len = mg_length(sv);
5217 (void)SvPV(sv, len);
5222 =for apidoc sv_len_utf8
5224 Returns the number of characters in the string in an SV, counting wide
5225 UTF8 bytes as a single character. Handles magic and type coercion.
5231 Perl_sv_len_utf8(pTHX_ register SV *sv)
5237 return mg_length(sv);
5241 U8 *s = (U8*)SvPV(sv, len);
5243 return Perl_utf8_length(aTHX_ s, s + len);
5248 =for apidoc sv_pos_u2b
5250 Converts the value pointed to by offsetp from a count of UTF8 chars from
5251 the start of the string, to a count of the equivalent number of bytes; if
5252 lenp is non-zero, it does the same to lenp, but this time starting from
5253 the offset, rather than from the start of the string. Handles magic and
5260 Perl_sv_pos_u2b(pTHX_ register SV *sv, I32* offsetp, I32* lenp)
5265 I32 uoffset = *offsetp;
5271 start = s = (U8*)SvPV(sv, len);
5273 while (s < send && uoffset--)
5277 *offsetp = s - start;
5281 while (s < send && ulen--)
5291 =for apidoc sv_pos_b2u
5293 Converts the value pointed to by offsetp from a count of bytes from the
5294 start of the string, to a count of the equivalent number of UTF8 chars.
5295 Handles magic and type coercion.
5301 Perl_sv_pos_b2u(pTHX_ register SV *sv, I32* offsetp)
5310 s = (U8*)SvPV(sv, len);
5311 if ((I32)len < *offsetp)
5312 Perl_croak(aTHX_ "panic: sv_pos_b2u: bad byte offset");
5313 send = s + *offsetp;
5317 /* Call utf8n_to_uvchr() to validate the sequence
5318 * (unless a simple non-UTF character) */
5319 if (!UTF8_IS_INVARIANT(*s))
5320 utf8n_to_uvchr(s, UTF8SKIP(s), &n, 0);
5335 Returns a boolean indicating whether the strings in the two SVs are
5336 identical. Is UTF-8 and 'use bytes' aware, handles get magic, and will
5337 coerce its args to strings if necessary.
5343 Perl_sv_eq(pTHX_ register SV *sv1, register SV *sv2)
5351 SV* svrecode = Nullsv;
5358 pv1 = SvPV(sv1, cur1);
5365 pv2 = SvPV(sv2, cur2);
5367 if (cur1 && cur2 && SvUTF8(sv1) != SvUTF8(sv2) && !IN_BYTES) {
5368 /* Differing utf8ness.
5369 * Do not UTF8size the comparands as a side-effect. */
5372 svrecode = newSVpvn(pv2, cur2);
5373 sv_recode_to_utf8(svrecode, PL_encoding);
5374 pv2 = SvPV(svrecode, cur2);
5377 svrecode = newSVpvn(pv1, cur1);
5378 sv_recode_to_utf8(svrecode, PL_encoding);
5379 pv1 = SvPV(svrecode, cur1);
5381 /* Now both are in UTF-8. */
5386 bool is_utf8 = TRUE;
5389 /* sv1 is the UTF-8 one,
5390 * if is equal it must be downgrade-able */
5391 char *pv = (char*)bytes_from_utf8((U8*)pv1,
5397 /* sv2 is the UTF-8 one,
5398 * if is equal it must be downgrade-able */
5399 char *pv = (char *)bytes_from_utf8((U8*)pv2,
5405 /* Downgrade not possible - cannot be eq */
5412 eq = memEQ(pv1, pv2, cur1);
5415 SvREFCNT_dec(svrecode);
5426 Compares the strings in two SVs. Returns -1, 0, or 1 indicating whether the
5427 string in C<sv1> is less than, equal to, or greater than the string in
5428 C<sv2>. Is UTF-8 and 'use bytes' aware, handles get magic, and will
5429 coerce its args to strings if necessary. See also C<sv_cmp_locale>.
5435 Perl_sv_cmp(pTHX_ register SV *sv1, register SV *sv2)
5438 char *pv1, *pv2, *tpv = Nullch;
5440 SV *svrecode = Nullsv;
5447 pv1 = SvPV(sv1, cur1);
5454 pv2 = SvPV(sv2, cur2);
5456 if (cur1 && cur2 && SvUTF8(sv1) != SvUTF8(sv2) && !IN_BYTES) {
5457 /* Differing utf8ness.
5458 * Do not UTF8size the comparands as a side-effect. */
5461 svrecode = newSVpvn(pv2, cur2);
5462 sv_recode_to_utf8(svrecode, PL_encoding);
5463 pv2 = SvPV(svrecode, cur2);
5466 pv2 = tpv = (char*)bytes_to_utf8((U8*)pv2, &cur2);
5471 svrecode = newSVpvn(pv1, cur1);
5472 sv_recode_to_utf8(svrecode, PL_encoding);
5473 pv1 = SvPV(svrecode, cur1);
5476 pv1 = tpv = (char*)bytes_to_utf8((U8*)pv1, &cur1);
5482 cmp = cur2 ? -1 : 0;
5486 I32 retval = memcmp((void*)pv1, (void*)pv2, cur1 < cur2 ? cur1 : cur2);
5489 cmp = retval < 0 ? -1 : 1;
5490 } else if (cur1 == cur2) {
5493 cmp = cur1 < cur2 ? -1 : 1;
5498 SvREFCNT_dec(svrecode);
5507 =for apidoc sv_cmp_locale
5509 Compares the strings in two SVs in a locale-aware manner. Is UTF-8 and
5510 'use bytes' aware, handles get magic, and will coerce its args to strings
5511 if necessary. See also C<sv_cmp_locale>. See also C<sv_cmp>.
5517 Perl_sv_cmp_locale(pTHX_ register SV *sv1, register SV *sv2)
5519 #ifdef USE_LOCALE_COLLATE
5525 if (PL_collation_standard)
5529 pv1 = sv1 ? sv_collxfrm(sv1, &len1) : (char *) NULL;
5531 pv2 = sv2 ? sv_collxfrm(sv2, &len2) : (char *) NULL;
5533 if (!pv1 || !len1) {
5544 retval = memcmp((void*)pv1, (void*)pv2, len1 < len2 ? len1 : len2);
5547 return retval < 0 ? -1 : 1;
5550 * When the result of collation is equality, that doesn't mean
5551 * that there are no differences -- some locales exclude some
5552 * characters from consideration. So to avoid false equalities,
5553 * we use the raw string as a tiebreaker.
5559 #endif /* USE_LOCALE_COLLATE */
5561 return sv_cmp(sv1, sv2);
5565 #ifdef USE_LOCALE_COLLATE
5568 =for apidoc sv_collxfrm
5570 Add Collate Transform magic to an SV if it doesn't already have it.
5572 Any scalar variable may carry PERL_MAGIC_collxfrm magic that contains the
5573 scalar data of the variable, but transformed to such a format that a normal
5574 memory comparison can be used to compare the data according to the locale
5581 Perl_sv_collxfrm(pTHX_ SV *sv, STRLEN *nxp)
5585 mg = SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_collxfrm) : (MAGIC *) NULL;
5586 if (!mg || !mg->mg_ptr || *(U32*)mg->mg_ptr != PL_collation_ix) {
5591 Safefree(mg->mg_ptr);
5593 if ((xf = mem_collxfrm(s, len, &xlen))) {
5594 if (SvREADONLY(sv)) {
5597 return xf + sizeof(PL_collation_ix);
5600 sv_magic(sv, 0, PERL_MAGIC_collxfrm, 0, 0);
5601 mg = mg_find(sv, PERL_MAGIC_collxfrm);
5614 if (mg && mg->mg_ptr) {
5616 return mg->mg_ptr + sizeof(PL_collation_ix);
5624 #endif /* USE_LOCALE_COLLATE */
5629 Get a line from the filehandle and store it into the SV, optionally
5630 appending to the currently-stored string.
5636 Perl_sv_gets(pTHX_ register SV *sv, register PerlIO *fp, I32 append)
5640 register STDCHAR rslast;
5641 register STDCHAR *bp;
5646 SV_CHECK_THINKFIRST(sv);
5647 (void)SvUPGRADE(sv, SVt_PV);
5651 if (PL_curcop == &PL_compiling) {
5652 /* we always read code in line mode */
5656 else if (RsSNARF(PL_rs)) {
5660 else if (RsRECORD(PL_rs)) {
5661 I32 recsize, bytesread;
5664 /* Grab the size of the record we're getting */
5665 recsize = SvIV(SvRV(PL_rs));
5666 (void)SvPOK_only(sv); /* Validate pointer */
5667 buffer = SvGROW(sv, (STRLEN)(recsize + 1));
5670 /* VMS wants read instead of fread, because fread doesn't respect */
5671 /* RMS record boundaries. This is not necessarily a good thing to be */
5672 /* doing, but we've got no other real choice */
5673 bytesread = PerlLIO_read(PerlIO_fileno(fp), buffer, recsize);
5675 bytesread = PerlIO_read(fp, buffer, recsize);
5677 SvCUR_set(sv, bytesread);
5678 buffer[bytesread] = '\0';
5679 if (PerlIO_isutf8(fp))
5683 return(SvCUR(sv) ? SvPVX(sv) : Nullch);
5685 else if (RsPARA(PL_rs)) {
5691 /* Get $/ i.e. PL_rs into same encoding as stream wants */
5692 if (PerlIO_isutf8(fp)) {
5693 rsptr = SvPVutf8(PL_rs, rslen);
5696 if (SvUTF8(PL_rs)) {
5697 if (!sv_utf8_downgrade(PL_rs, TRUE)) {
5698 Perl_croak(aTHX_ "Wide character in $/");
5701 rsptr = SvPV(PL_rs, rslen);
5705 rslast = rslen ? rsptr[rslen - 1] : '\0';
5707 if (rspara) { /* have to do this both before and after */
5708 do { /* to make sure file boundaries work right */
5711 i = PerlIO_getc(fp);
5715 PerlIO_ungetc(fp,i);
5721 /* See if we know enough about I/O mechanism to cheat it ! */
5723 /* This used to be #ifdef test - it is made run-time test for ease
5724 of abstracting out stdio interface. One call should be cheap
5725 enough here - and may even be a macro allowing compile
5729 if (PerlIO_fast_gets(fp)) {
5732 * We're going to steal some values from the stdio struct
5733 * and put EVERYTHING in the innermost loop into registers.
5735 register STDCHAR *ptr;
5739 #if defined(VMS) && defined(PERLIO_IS_STDIO)
5740 /* An ungetc()d char is handled separately from the regular
5741 * buffer, so we getc() it back out and stuff it in the buffer.
5743 i = PerlIO_getc(fp);
5744 if (i == EOF) return 0;
5745 *(--((*fp)->_ptr)) = (unsigned char) i;
5749 /* Here is some breathtakingly efficient cheating */
5751 cnt = PerlIO_get_cnt(fp); /* get count into register */
5752 (void)SvPOK_only(sv); /* validate pointer */
5753 if ((I32)(SvLEN(sv) - append) <= cnt + 1) { /* make sure we have the room */
5754 if (cnt > 80 && (I32)SvLEN(sv) > append) {
5755 shortbuffered = cnt - SvLEN(sv) + append + 1;
5756 cnt -= shortbuffered;
5760 /* remember that cnt can be negative */
5761 SvGROW(sv, (STRLEN)(append + (cnt <= 0 ? 2 : (cnt + 1))));
5766 bp = (STDCHAR*)SvPVX(sv) + append; /* move these two too to registers */
5767 ptr = (STDCHAR*)PerlIO_get_ptr(fp);
5768 DEBUG_P(PerlIO_printf(Perl_debug_log,
5769 "Screamer: entering, ptr=%"UVuf", cnt=%ld\n",PTR2UV(ptr),(long)cnt));
5770 DEBUG_P(PerlIO_printf(Perl_debug_log,
5771 "Screamer: entering: PerlIO * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
5772 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
5773 PTR2UV(PerlIO_has_base(fp) ? PerlIO_get_base(fp) : 0)));
5778 while (cnt > 0) { /* this | eat */
5780 if ((*bp++ = *ptr++) == rslast) /* really | dust */
5781 goto thats_all_folks; /* screams | sed :-) */
5785 Copy(ptr, bp, cnt, char); /* this | eat */
5786 bp += cnt; /* screams | dust */
5787 ptr += cnt; /* louder | sed :-) */
5792 if (shortbuffered) { /* oh well, must extend */
5793 cnt = shortbuffered;
5795 bpx = bp - (STDCHAR*)SvPVX(sv); /* box up before relocation */
5797 SvGROW(sv, SvLEN(sv) + append + cnt + 2);
5798 bp = (STDCHAR*)SvPVX(sv) + bpx; /* unbox after relocation */
5802 DEBUG_P(PerlIO_printf(Perl_debug_log,
5803 "Screamer: going to getc, ptr=%"UVuf", cnt=%ld\n",
5804 PTR2UV(ptr),(long)cnt));
5805 PerlIO_set_ptrcnt(fp, (STDCHAR*)ptr, cnt); /* deregisterize cnt and ptr */
5807 DEBUG_P(PerlIO_printf(Perl_debug_log,
5808 "Screamer: pre: FILE * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
5809 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
5810 PTR2UV(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0)));
5812 /* This used to call 'filbuf' in stdio form, but as that behaves like
5813 getc when cnt <= 0 we use PerlIO_getc here to avoid introducing
5814 another abstraction. */
5815 i = PerlIO_getc(fp); /* get more characters */
5817 DEBUG_P(PerlIO_printf(Perl_debug_log,
5818 "Screamer: post: FILE * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
5819 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
5820 PTR2UV(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0)));
5822 cnt = PerlIO_get_cnt(fp);
5823 ptr = (STDCHAR*)PerlIO_get_ptr(fp); /* reregisterize cnt and ptr */
5824 DEBUG_P(PerlIO_printf(Perl_debug_log,
5825 "Screamer: after getc, ptr=%"UVuf", cnt=%ld\n",PTR2UV(ptr),(long)cnt));
5827 if (i == EOF) /* all done for ever? */
5828 goto thats_really_all_folks;
5830 bpx = bp - (STDCHAR*)SvPVX(sv); /* box up before relocation */
5832 SvGROW(sv, bpx + cnt + 2);
5833 bp = (STDCHAR*)SvPVX(sv) + bpx; /* unbox after relocation */
5835 *bp++ = (STDCHAR)i; /* store character from PerlIO_getc */
5837 if (rslen && (STDCHAR)i == rslast) /* all done for now? */
5838 goto thats_all_folks;
5842 if ((rslen > 1 && (STRLEN)(bp - (STDCHAR*)SvPVX(sv)) < rslen) ||
5843 memNE((char*)bp - rslen, rsptr, rslen))
5844 goto screamer; /* go back to the fray */
5845 thats_really_all_folks:
5847 cnt += shortbuffered;
5848 DEBUG_P(PerlIO_printf(Perl_debug_log,
5849 "Screamer: quitting, ptr=%"UVuf", cnt=%ld\n",PTR2UV(ptr),(long)cnt));
5850 PerlIO_set_ptrcnt(fp, (STDCHAR*)ptr, cnt); /* put these back or we're in trouble */
5851 DEBUG_P(PerlIO_printf(Perl_debug_log,
5852 "Screamer: end: FILE * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
5853 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
5854 PTR2UV(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0)));
5856 SvCUR_set(sv, bp - (STDCHAR*)SvPVX(sv)); /* set length */
5857 DEBUG_P(PerlIO_printf(Perl_debug_log,
5858 "Screamer: done, len=%ld, string=|%.*s|\n",
5859 (long)SvCUR(sv),(int)SvCUR(sv),SvPVX(sv)));
5864 /*The big, slow, and stupid way */
5867 /* Need to work around EPOC SDK features */
5868 /* On WINS: MS VC5 generates calls to _chkstk, */
5869 /* if a `large' stack frame is allocated */
5870 /* gcc on MARM does not generate calls like these */
5876 register STDCHAR *bpe = buf + sizeof(buf);
5878 while ((i = PerlIO_getc(fp)) != EOF && (*bp++ = (STDCHAR)i) != rslast && bp < bpe)
5879 ; /* keep reading */
5883 cnt = PerlIO_read(fp,(char*)buf, sizeof(buf));
5884 /* Accomodate broken VAXC compiler, which applies U8 cast to
5885 * both args of ?: operator, causing EOF to change into 255
5887 /* For some reason #17270 broke things for DJGPP and NetWare.
5888 * Another hunk just below. */
5889 #if defined(DJGPP) || defined(NETWARE)
5895 i = (U8)buf[cnt - 1];
5902 /* This is basically undoing #17270 for DJGPP and NetWare.
5903 * Another hunk just above. */
5904 #if !(defined(DJGPP) || defined(NETWARE))
5909 sv_catpvn(sv, (char *) buf, cnt);
5911 sv_setpvn(sv, (char *) buf, cnt);
5914 if (i != EOF && /* joy */
5916 SvCUR(sv) < rslen ||
5917 memNE(SvPVX(sv) + SvCUR(sv) - rslen, rsptr, rslen)))
5921 * If we're reading from a TTY and we get a short read,
5922 * indicating that the user hit his EOF character, we need
5923 * to notice it now, because if we try to read from the TTY
5924 * again, the EOF condition will disappear.
5926 * The comparison of cnt to sizeof(buf) is an optimization
5927 * that prevents unnecessary calls to feof().
5931 if (!(cnt < sizeof(buf) && PerlIO_eof(fp)))
5936 if (rspara) { /* have to do this both before and after */
5937 while (i != EOF) { /* to make sure file boundaries work right */
5938 i = PerlIO_getc(fp);
5940 PerlIO_ungetc(fp,i);
5946 if (PerlIO_isutf8(fp))
5951 return (SvCUR(sv) - append) ? SvPVX(sv) : Nullch;
5957 Auto-increment of the value in the SV, doing string to numeric conversion
5958 if necessary. Handles 'get' magic.
5964 Perl_sv_inc(pTHX_ register SV *sv)
5973 if (SvTHINKFIRST(sv)) {
5974 if (SvREADONLY(sv) && SvFAKE(sv))
5975 sv_force_normal(sv);
5976 if (SvREADONLY(sv)) {
5977 if (PL_curcop != &PL_compiling)
5978 Perl_croak(aTHX_ PL_no_modify);
5982 if (SvAMAGIC(sv) && AMG_CALLun(sv,inc))
5984 i = PTR2IV(SvRV(sv));
5989 flags = SvFLAGS(sv);
5990 if ((flags & (SVp_NOK|SVp_IOK)) == SVp_NOK) {
5991 /* It's (privately or publicly) a float, but not tested as an
5992 integer, so test it to see. */
5994 flags = SvFLAGS(sv);
5996 if ((flags & SVf_IOK) || ((flags & (SVp_IOK | SVp_NOK)) == SVp_IOK)) {
5997 /* It's publicly an integer, or privately an integer-not-float */
5998 #ifdef PERL_PRESERVE_IVUV
6002 if (SvUVX(sv) == UV_MAX)
6003 sv_setnv(sv, UV_MAX_P1);
6005 (void)SvIOK_only_UV(sv);
6008 if (SvIVX(sv) == IV_MAX)
6009 sv_setuv(sv, (UV)IV_MAX + 1);
6011 (void)SvIOK_only(sv);
6017 if (flags & SVp_NOK) {
6018 (void)SvNOK_only(sv);
6023 if (!(flags & SVp_POK) || !*SvPVX(sv)) {
6024 if ((flags & SVTYPEMASK) < SVt_PVIV)
6025 sv_upgrade(sv, SVt_IV);
6026 (void)SvIOK_only(sv);
6031 while (isALPHA(*d)) d++;
6032 while (isDIGIT(*d)) d++;
6034 #ifdef PERL_PRESERVE_IVUV
6035 /* Got to punt this as an integer if needs be, but we don't issue
6036 warnings. Probably ought to make the sv_iv_please() that does
6037 the conversion if possible, and silently. */
6038 int numtype = grok_number(SvPVX(sv), SvCUR(sv), NULL);
6039 if (numtype && !(numtype & IS_NUMBER_INFINITY)) {
6040 /* Need to try really hard to see if it's an integer.
6041 9.22337203685478e+18 is an integer.
6042 but "9.22337203685478e+18" + 0 is UV=9223372036854779904
6043 so $a="9.22337203685478e+18"; $a+0; $a++
6044 needs to be the same as $a="9.22337203685478e+18"; $a++
6051 /* sv_2iv *should* have made this an NV */
6052 if (flags & SVp_NOK) {
6053 (void)SvNOK_only(sv);
6057 /* I don't think we can get here. Maybe I should assert this
6058 And if we do get here I suspect that sv_setnv will croak. NWC
6060 #if defined(USE_LONG_DOUBLE)
6061 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",
6062 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
6064 DEBUG_c(PerlIO_printf(Perl_debug_log,"sv_inc punt failed to convert '%s' to IOK or NOKp, UV=0x%"UVxf" NV=%"NVgf"\n",
6065 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
6068 #endif /* PERL_PRESERVE_IVUV */
6069 sv_setnv(sv,Atof(SvPVX(sv)) + 1.0);
6073 while (d >= SvPVX(sv)) {
6081 /* MKS: The original code here died if letters weren't consecutive.
6082 * at least it didn't have to worry about non-C locales. The
6083 * new code assumes that ('z'-'a')==('Z'-'A'), letters are
6084 * arranged in order (although not consecutively) and that only
6085 * [A-Za-z] are accepted by isALPHA in the C locale.
6087 if (*d != 'z' && *d != 'Z') {
6088 do { ++*d; } while (!isALPHA(*d));
6091 *(d--) -= 'z' - 'a';
6096 *(d--) -= 'z' - 'a' + 1;
6100 /* oh,oh, the number grew */
6101 SvGROW(sv, SvCUR(sv) + 2);
6103 for (d = SvPVX(sv) + SvCUR(sv); d > SvPVX(sv); d--)
6114 Auto-decrement of the value in the SV, doing string to numeric conversion
6115 if necessary. Handles 'get' magic.
6121 Perl_sv_dec(pTHX_ register SV *sv)
6129 if (SvTHINKFIRST(sv)) {
6130 if (SvREADONLY(sv) && SvFAKE(sv))
6131 sv_force_normal(sv);
6132 if (SvREADONLY(sv)) {
6133 if (PL_curcop != &PL_compiling)
6134 Perl_croak(aTHX_ PL_no_modify);
6138 if (SvAMAGIC(sv) && AMG_CALLun(sv,dec))
6140 i = PTR2IV(SvRV(sv));
6145 /* Unlike sv_inc we don't have to worry about string-never-numbers
6146 and keeping them magic. But we mustn't warn on punting */
6147 flags = SvFLAGS(sv);
6148 if ((flags & SVf_IOK) || ((flags & (SVp_IOK | SVp_NOK)) == SVp_IOK)) {
6149 /* It's publicly an integer, or privately an integer-not-float */
6150 #ifdef PERL_PRESERVE_IVUV
6154 if (SvUVX(sv) == 0) {
6155 (void)SvIOK_only(sv);
6159 (void)SvIOK_only_UV(sv);
6163 if (SvIVX(sv) == IV_MIN)
6164 sv_setnv(sv, (NV)IV_MIN - 1.0);
6166 (void)SvIOK_only(sv);
6172 if (flags & SVp_NOK) {
6174 (void)SvNOK_only(sv);
6177 if (!(flags & SVp_POK)) {
6178 if ((flags & SVTYPEMASK) < SVt_PVNV)
6179 sv_upgrade(sv, SVt_NV);
6181 (void)SvNOK_only(sv);
6184 #ifdef PERL_PRESERVE_IVUV
6186 int numtype = grok_number(SvPVX(sv), SvCUR(sv), NULL);
6187 if (numtype && !(numtype & IS_NUMBER_INFINITY)) {
6188 /* Need to try really hard to see if it's an integer.
6189 9.22337203685478e+18 is an integer.
6190 but "9.22337203685478e+18" + 0 is UV=9223372036854779904
6191 so $a="9.22337203685478e+18"; $a+0; $a--
6192 needs to be the same as $a="9.22337203685478e+18"; $a--
6199 /* sv_2iv *should* have made this an NV */
6200 if (flags & SVp_NOK) {
6201 (void)SvNOK_only(sv);
6205 /* I don't think we can get here. Maybe I should assert this
6206 And if we do get here I suspect that sv_setnv will croak. NWC
6208 #if defined(USE_LONG_DOUBLE)
6209 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",
6210 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
6212 DEBUG_c(PerlIO_printf(Perl_debug_log,"sv_dec punt failed to convert '%s' to IOK or NOKp, UV=0x%"UVxf" NV=%"NVgf"\n",
6213 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
6217 #endif /* PERL_PRESERVE_IVUV */
6218 sv_setnv(sv,Atof(SvPVX(sv)) - 1.0); /* punt */
6222 =for apidoc sv_mortalcopy
6224 Creates a new SV which is a copy of the original SV (using C<sv_setsv>).
6225 The new SV is marked as mortal. It will be destroyed "soon", either by an
6226 explicit call to FREETMPS, or by an implicit call at places such as
6227 statement boundaries. See also C<sv_newmortal> and C<sv_2mortal>.
6232 /* Make a string that will exist for the duration of the expression
6233 * evaluation. Actually, it may have to last longer than that, but
6234 * hopefully we won't free it until it has been assigned to a
6235 * permanent location. */
6238 Perl_sv_mortalcopy(pTHX_ SV *oldstr)
6243 sv_setsv(sv,oldstr);
6245 PL_tmps_stack[++PL_tmps_ix] = sv;
6251 =for apidoc sv_newmortal
6253 Creates a new null SV which is mortal. The reference count of the SV is
6254 set to 1. It will be destroyed "soon", either by an explicit call to
6255 FREETMPS, or by an implicit call at places such as statement boundaries.
6256 See also C<sv_mortalcopy> and C<sv_2mortal>.
6262 Perl_sv_newmortal(pTHX)
6267 SvFLAGS(sv) = SVs_TEMP;
6269 PL_tmps_stack[++PL_tmps_ix] = sv;
6274 =for apidoc sv_2mortal
6276 Marks an existing SV as mortal. The SV will be destroyed "soon", either
6277 by an explicit call to FREETMPS, or by an implicit call at places such as
6278 statement boundaries. See also C<sv_newmortal> and C<sv_mortalcopy>.
6284 Perl_sv_2mortal(pTHX_ register SV *sv)
6288 if (SvREADONLY(sv) && SvIMMORTAL(sv))
6291 PL_tmps_stack[++PL_tmps_ix] = sv;
6299 Creates a new SV and copies a string into it. The reference count for the
6300 SV is set to 1. If C<len> is zero, Perl will compute the length using
6301 strlen(). For efficiency, consider using C<newSVpvn> instead.
6307 Perl_newSVpv(pTHX_ const char *s, STRLEN len)
6314 sv_setpvn(sv,s,len);
6319 =for apidoc newSVpvn
6321 Creates a new SV and copies a string into it. The reference count for the
6322 SV is set to 1. Note that if C<len> is zero, Perl will create a zero length
6323 string. You are responsible for ensuring that the source string is at least
6330 Perl_newSVpvn(pTHX_ const char *s, STRLEN len)
6335 sv_setpvn(sv,s,len);
6340 =for apidoc newSVpvn_share
6342 Creates a new SV with its SvPVX pointing to a shared string in the string
6343 table. If the string does not already exist in the table, it is created
6344 first. Turns on READONLY and FAKE. The string's hash is stored in the UV
6345 slot of the SV; if the C<hash> parameter is non-zero, that value is used;
6346 otherwise the hash is computed. The idea here is that as the string table
6347 is used for shared hash keys these strings will have SvPVX == HeKEY and
6348 hash lookup will avoid string compare.
6354 Perl_newSVpvn_share(pTHX_ const char *src, I32 len, U32 hash)
6357 bool is_utf8 = FALSE;
6359 STRLEN tmplen = -len;
6361 /* See the note in hv.c:hv_fetch() --jhi */
6362 src = (char*)bytes_from_utf8((U8*)src, &tmplen, &is_utf8);
6366 PERL_HASH(hash, src, len);
6368 sv_upgrade(sv, SVt_PVIV);
6369 SvPVX(sv) = sharepvn(src, is_utf8?-len:len, hash);
6382 #if defined(PERL_IMPLICIT_CONTEXT)
6384 /* pTHX_ magic can't cope with varargs, so this is a no-context
6385 * version of the main function, (which may itself be aliased to us).
6386 * Don't access this version directly.
6390 Perl_newSVpvf_nocontext(const char* pat, ...)
6395 va_start(args, pat);
6396 sv = vnewSVpvf(pat, &args);
6403 =for apidoc newSVpvf
6405 Creates a new SV and initializes it with the string formatted like
6412 Perl_newSVpvf(pTHX_ const char* pat, ...)
6416 va_start(args, pat);
6417 sv = vnewSVpvf(pat, &args);
6422 /* backend for newSVpvf() and newSVpvf_nocontext() */
6425 Perl_vnewSVpvf(pTHX_ const char* pat, va_list* args)
6429 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
6436 Creates a new SV and copies a floating point value into it.
6437 The reference count for the SV is set to 1.
6443 Perl_newSVnv(pTHX_ NV n)
6455 Creates a new SV and copies an integer into it. The reference count for the
6462 Perl_newSViv(pTHX_ IV i)
6474 Creates a new SV and copies an unsigned integer into it.
6475 The reference count for the SV is set to 1.
6481 Perl_newSVuv(pTHX_ UV u)
6491 =for apidoc newRV_noinc
6493 Creates an RV wrapper for an SV. The reference count for the original
6494 SV is B<not> incremented.
6500 Perl_newRV_noinc(pTHX_ SV *tmpRef)
6505 sv_upgrade(sv, SVt_RV);
6512 /* newRV_inc is the official function name to use now.
6513 * newRV_inc is in fact #defined to newRV in sv.h
6517 Perl_newRV(pTHX_ SV *tmpRef)
6519 return newRV_noinc(SvREFCNT_inc(tmpRef));
6525 Creates a new SV which is an exact duplicate of the original SV.
6532 Perl_newSVsv(pTHX_ register SV *old)
6538 if (SvTYPE(old) == SVTYPEMASK) {
6539 if (ckWARN_d(WARN_INTERNAL))
6540 Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "semi-panic: attempt to dup freed string");
6555 =for apidoc sv_reset
6557 Underlying implementation for the C<reset> Perl function.
6558 Note that the perl-level function is vaguely deprecated.
6564 Perl_sv_reset(pTHX_ register char *s, HV *stash)
6572 char todo[PERL_UCHAR_MAX+1];
6577 if (!*s) { /* reset ?? searches */
6578 for (pm = HvPMROOT(stash); pm; pm = pm->op_pmnext) {
6579 pm->op_pmdynflags &= ~PMdf_USED;
6584 /* reset variables */
6586 if (!HvARRAY(stash))
6589 Zero(todo, 256, char);
6591 i = (unsigned char)*s;
6595 max = (unsigned char)*s++;
6596 for ( ; i <= max; i++) {
6599 for (i = 0; i <= (I32) HvMAX(stash); i++) {
6600 for (entry = HvARRAY(stash)[i];
6602 entry = HeNEXT(entry))
6604 if (!todo[(U8)*HeKEY(entry)])
6606 gv = (GV*)HeVAL(entry);
6608 if (SvTHINKFIRST(sv)) {
6609 if (!SvREADONLY(sv) && SvROK(sv))
6614 if (SvTYPE(sv) >= SVt_PV) {
6616 if (SvPVX(sv) != Nullch)
6623 if (GvHV(gv) && !HvNAME(GvHV(gv))) {
6625 #ifdef USE_ENVIRON_ARRAY
6627 # ifdef USE_ITHREADS
6628 && PL_curinterp == aTHX
6632 environ[0] = Nullch;
6644 Using various gambits, try to get an IO from an SV: the IO slot if its a
6645 GV; or the recursive result if we're an RV; or the IO slot of the symbol
6646 named after the PV if we're a string.
6652 Perl_sv_2io(pTHX_ SV *sv)
6658 switch (SvTYPE(sv)) {
6666 Perl_croak(aTHX_ "Bad filehandle: %s", GvNAME(gv));
6670 Perl_croak(aTHX_ PL_no_usym, "filehandle");
6672 return sv_2io(SvRV(sv));
6673 gv = gv_fetchpv(SvPV(sv,n_a), FALSE, SVt_PVIO);
6679 Perl_croak(aTHX_ "Bad filehandle: %s", SvPV(sv,n_a));
6688 Using various gambits, try to get a CV from an SV; in addition, try if
6689 possible to set C<*st> and C<*gvp> to the stash and GV associated with it.
6695 Perl_sv_2cv(pTHX_ SV *sv, HV **st, GV **gvp, I32 lref)
6702 return *gvp = Nullgv, Nullcv;
6703 switch (SvTYPE(sv)) {
6722 SV **sp = &sv; /* Used in tryAMAGICunDEREF macro. */
6723 tryAMAGICunDEREF(to_cv);
6726 if (SvTYPE(sv) == SVt_PVCV) {
6735 Perl_croak(aTHX_ "Not a subroutine reference");
6740 gv = gv_fetchpv(SvPV(sv, n_a), lref, SVt_PVCV);
6746 if (lref && !GvCVu(gv)) {
6749 tmpsv = NEWSV(704,0);
6750 gv_efullname3(tmpsv, gv, Nullch);
6751 /* XXX this is probably not what they think they're getting.
6752 * It has the same effect as "sub name;", i.e. just a forward
6754 newSUB(start_subparse(FALSE, 0),
6755 newSVOP(OP_CONST, 0, tmpsv),
6760 Perl_croak(aTHX_ "Unable to create sub named \"%s\"", SvPV(sv,n_a));
6769 Returns true if the SV has a true value by Perl's rules.
6770 Use the C<SvTRUE> macro instead, which may call C<sv_true()> or may
6771 instead use an in-line version.
6777 Perl_sv_true(pTHX_ register SV *sv)
6783 if ((tXpv = (XPV*)SvANY(sv)) &&
6784 (tXpv->xpv_cur > 1 ||
6785 (tXpv->xpv_cur && *tXpv->xpv_pv != '0')))
6792 return SvIVX(sv) != 0;
6795 return SvNVX(sv) != 0.0;
6797 return sv_2bool(sv);
6805 A private implementation of the C<SvIVx> macro for compilers which can't
6806 cope with complex macro expressions. Always use the macro instead.
6812 Perl_sv_iv(pTHX_ register SV *sv)
6816 return (IV)SvUVX(sv);
6825 A private implementation of the C<SvUVx> macro for compilers which can't
6826 cope with complex macro expressions. Always use the macro instead.
6832 Perl_sv_uv(pTHX_ register SV *sv)
6837 return (UV)SvIVX(sv);
6845 A private implementation of the C<SvNVx> macro for compilers which can't
6846 cope with complex macro expressions. Always use the macro instead.
6852 Perl_sv_nv(pTHX_ register SV *sv)
6862 Use the C<SvPV_nolen> macro instead
6866 A private implementation of the C<SvPV> macro for compilers which can't
6867 cope with complex macro expressions. Always use the macro instead.
6873 Perl_sv_pvn(pTHX_ SV *sv, STRLEN *lp)
6879 return sv_2pv(sv, lp);
6884 Perl_sv_pvn_nomg(pTHX_ register SV *sv, STRLEN *lp)
6890 return sv_2pv_flags(sv, lp, 0);
6894 =for apidoc sv_pvn_force
6896 Get a sensible string out of the SV somehow.
6897 A private implementation of the C<SvPV_force> macro for compilers which
6898 can't cope with complex macro expressions. Always use the macro instead.
6900 =for apidoc sv_pvn_force_flags
6902 Get a sensible string out of the SV somehow.
6903 If C<flags> has C<SV_GMAGIC> bit set, will C<mg_get> on C<sv> if
6904 appropriate, else not. C<sv_pvn_force> and C<sv_pvn_force_nomg> are
6905 implemented in terms of this function.
6906 You normally want to use the various wrapper macros instead: see
6907 C<SvPV_force> and C<SvPV_force_nomg>
6913 Perl_sv_pvn_force_flags(pTHX_ SV *sv, STRLEN *lp, I32 flags)
6917 if (SvTHINKFIRST(sv) && !SvROK(sv))
6918 sv_force_normal(sv);
6924 if (SvTYPE(sv) > SVt_PVLV && SvTYPE(sv) != SVt_PVFM) {
6925 Perl_croak(aTHX_ "Can't coerce %s to string in %s", sv_reftype(sv,0),
6929 s = sv_2pv_flags(sv, lp, flags);
6930 if (s != SvPVX(sv)) { /* Almost, but not quite, sv_setpvn() */
6935 (void)SvUPGRADE(sv, SVt_PV); /* Never FALSE */
6936 SvGROW(sv, len + 1);
6937 Move(s,SvPVX(sv),len,char);
6942 SvPOK_on(sv); /* validate pointer */
6944 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2pv(%s)\n",
6945 PTR2UV(sv),SvPVX(sv)));
6952 =for apidoc sv_pvbyte
6954 Use C<SvPVbyte_nolen> instead.
6956 =for apidoc sv_pvbyten
6958 A private implementation of the C<SvPVbyte> macro for compilers
6959 which can't cope with complex macro expressions. Always use the macro
6966 Perl_sv_pvbyten(pTHX_ SV *sv, STRLEN *lp)
6968 sv_utf8_downgrade(sv,0);
6969 return sv_pvn(sv,lp);
6973 =for apidoc sv_pvbyten_force
6975 A private implementation of the C<SvPVbytex_force> macro for compilers
6976 which can't cope with complex macro expressions. Always use the macro
6983 Perl_sv_pvbyten_force(pTHX_ SV *sv, STRLEN *lp)
6985 sv_utf8_downgrade(sv,0);
6986 return sv_pvn_force(sv,lp);
6990 =for apidoc sv_pvutf8
6992 Use the C<SvPVutf8_nolen> macro instead
6994 =for apidoc sv_pvutf8n
6996 A private implementation of the C<SvPVutf8> macro for compilers
6997 which can't cope with complex macro expressions. Always use the macro
7004 Perl_sv_pvutf8n(pTHX_ SV *sv, STRLEN *lp)
7006 sv_utf8_upgrade(sv);
7007 return sv_pvn(sv,lp);
7011 =for apidoc sv_pvutf8n_force
7013 A private implementation of the C<SvPVutf8_force> macro for compilers
7014 which can't cope with complex macro expressions. Always use the macro
7021 Perl_sv_pvutf8n_force(pTHX_ SV *sv, STRLEN *lp)
7023 sv_utf8_upgrade(sv);
7024 return sv_pvn_force(sv,lp);
7028 =for apidoc sv_reftype
7030 Returns a string describing what the SV is a reference to.
7036 Perl_sv_reftype(pTHX_ SV *sv, int ob)
7038 if (ob && SvOBJECT(sv)) {
7039 HV *svs = SvSTASH(sv);
7040 /* [20011101.072] This bandaid for C<package;> should eventually
7041 be removed. AMS 20011103 */
7042 return (svs ? HvNAME(svs) : "<none>");
7045 switch (SvTYPE(sv)) {
7059 case SVt_PVLV: return "LVALUE";
7060 case SVt_PVAV: return "ARRAY";
7061 case SVt_PVHV: return "HASH";
7062 case SVt_PVCV: return "CODE";
7063 case SVt_PVGV: return "GLOB";
7064 case SVt_PVFM: return "FORMAT";
7065 case SVt_PVIO: return "IO";
7066 default: return "UNKNOWN";
7072 =for apidoc sv_isobject
7074 Returns a boolean indicating whether the SV is an RV pointing to a blessed
7075 object. If the SV is not an RV, or if the object is not blessed, then this
7082 Perl_sv_isobject(pTHX_ SV *sv)
7099 Returns a boolean indicating whether the SV is blessed into the specified
7100 class. This does not check for subtypes; use C<sv_derived_from> to verify
7101 an inheritance relationship.
7107 Perl_sv_isa(pTHX_ SV *sv, const char *name)
7119 return strEQ(HvNAME(SvSTASH(sv)), name);
7125 Creates a new SV for the RV, C<rv>, to point to. If C<rv> is not an RV then
7126 it will be upgraded to one. If C<classname> is non-null then the new SV will
7127 be blessed in the specified package. The new SV is returned and its
7128 reference count is 1.
7134 Perl_newSVrv(pTHX_ SV *rv, const char *classname)
7140 SV_CHECK_THINKFIRST(rv);
7143 if (SvTYPE(rv) >= SVt_PVMG) {
7144 U32 refcnt = SvREFCNT(rv);
7148 SvREFCNT(rv) = refcnt;
7151 if (SvTYPE(rv) < SVt_RV)
7152 sv_upgrade(rv, SVt_RV);
7153 else if (SvTYPE(rv) > SVt_RV) {
7154 (void)SvOOK_off(rv);
7155 if (SvPVX(rv) && SvLEN(rv))
7156 Safefree(SvPVX(rv));
7166 HV* stash = gv_stashpv(classname, TRUE);
7167 (void)sv_bless(rv, stash);
7173 =for apidoc sv_setref_pv
7175 Copies a pointer into a new SV, optionally blessing the SV. The C<rv>
7176 argument will be upgraded to an RV. That RV will be modified to point to
7177 the new SV. If the C<pv> argument is NULL then C<PL_sv_undef> will be placed
7178 into the SV. The C<classname> argument indicates the package for the
7179 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
7180 will be returned and will have a reference count of 1.
7182 Do not use with other Perl types such as HV, AV, SV, CV, because those
7183 objects will become corrupted by the pointer copy process.
7185 Note that C<sv_setref_pvn> copies the string while this copies the pointer.
7191 Perl_sv_setref_pv(pTHX_ SV *rv, const char *classname, void *pv)
7194 sv_setsv(rv, &PL_sv_undef);
7198 sv_setiv(newSVrv(rv,classname), PTR2IV(pv));
7203 =for apidoc sv_setref_iv
7205 Copies an integer into a new SV, optionally blessing the SV. The C<rv>
7206 argument will be upgraded to an RV. That RV will be modified to point to
7207 the new SV. The C<classname> argument indicates the package for the
7208 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
7209 will be returned and will have a reference count of 1.
7215 Perl_sv_setref_iv(pTHX_ SV *rv, const char *classname, IV iv)
7217 sv_setiv(newSVrv(rv,classname), iv);
7222 =for apidoc sv_setref_uv
7224 Copies an unsigned integer into a new SV, optionally blessing the SV. The C<rv>
7225 argument will be upgraded to an RV. That RV will be modified to point to
7226 the new SV. The C<classname> argument indicates the package for the
7227 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
7228 will be returned and will have a reference count of 1.
7234 Perl_sv_setref_uv(pTHX_ SV *rv, const char *classname, UV uv)
7236 sv_setuv(newSVrv(rv,classname), uv);
7241 =for apidoc sv_setref_nv
7243 Copies a double into a new SV, optionally blessing the SV. The C<rv>
7244 argument will be upgraded to an RV. That RV will be modified to point to
7245 the new SV. The C<classname> argument indicates the package for the
7246 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
7247 will be returned and will have a reference count of 1.
7253 Perl_sv_setref_nv(pTHX_ SV *rv, const char *classname, NV nv)
7255 sv_setnv(newSVrv(rv,classname), nv);
7260 =for apidoc sv_setref_pvn
7262 Copies a string into a new SV, optionally blessing the SV. The length of the
7263 string must be specified with C<n>. The C<rv> argument will be upgraded to
7264 an RV. That RV will be modified to point to the new SV. The C<classname>
7265 argument indicates the package for the blessing. Set C<classname> to
7266 C<Nullch> to avoid the blessing. The new SV will be returned and will have
7267 a reference count of 1.
7269 Note that C<sv_setref_pv> copies the pointer while this copies the string.
7275 Perl_sv_setref_pvn(pTHX_ SV *rv, const char *classname, char *pv, STRLEN n)
7277 sv_setpvn(newSVrv(rv,classname), pv, n);
7282 =for apidoc sv_bless
7284 Blesses an SV into a specified package. The SV must be an RV. The package
7285 must be designated by its stash (see C<gv_stashpv()>). The reference count
7286 of the SV is unaffected.
7292 Perl_sv_bless(pTHX_ SV *sv, HV *stash)
7296 Perl_croak(aTHX_ "Can't bless non-reference value");
7298 if (SvFLAGS(tmpRef) & (SVs_OBJECT|SVf_READONLY)) {
7299 if (SvREADONLY(tmpRef))
7300 Perl_croak(aTHX_ PL_no_modify);
7301 if (SvOBJECT(tmpRef)) {
7302 if (SvTYPE(tmpRef) != SVt_PVIO)
7304 SvREFCNT_dec(SvSTASH(tmpRef));
7307 SvOBJECT_on(tmpRef);
7308 if (SvTYPE(tmpRef) != SVt_PVIO)
7310 (void)SvUPGRADE(tmpRef, SVt_PVMG);
7311 SvSTASH(tmpRef) = (HV*)SvREFCNT_inc(stash);
7318 if(SvSMAGICAL(tmpRef))
7319 if(mg_find(tmpRef, PERL_MAGIC_ext) || mg_find(tmpRef, PERL_MAGIC_uvar))
7327 /* Downgrades a PVGV to a PVMG.
7331 S_sv_unglob(pTHX_ SV *sv)
7335 assert(SvTYPE(sv) == SVt_PVGV);
7340 SvREFCNT_dec(GvSTASH(sv));
7341 GvSTASH(sv) = Nullhv;
7343 sv_unmagic(sv, PERL_MAGIC_glob);
7344 Safefree(GvNAME(sv));
7347 /* need to keep SvANY(sv) in the right arena */
7348 xpvmg = new_XPVMG();
7349 StructCopy(SvANY(sv), xpvmg, XPVMG);
7350 del_XPVGV(SvANY(sv));
7353 SvFLAGS(sv) &= ~SVTYPEMASK;
7354 SvFLAGS(sv) |= SVt_PVMG;
7358 =for apidoc sv_unref_flags
7360 Unsets the RV status of the SV, and decrements the reference count of
7361 whatever was being referenced by the RV. This can almost be thought of
7362 as a reversal of C<newSVrv>. The C<cflags> argument can contain
7363 C<SV_IMMEDIATE_UNREF> to force the reference count to be decremented
7364 (otherwise the decrementing is conditional on the reference count being
7365 different from one or the reference being a readonly SV).
7372 Perl_sv_unref_flags(pTHX_ SV *sv, U32 flags)
7376 if (SvWEAKREF(sv)) {
7384 if (SvREFCNT(rv) != 1 || SvREADONLY(rv) || flags) /* SV_IMMEDIATE_UNREF */
7386 else /* XXX Hack, but hard to make $a=$a->[1] work otherwise */
7387 sv_2mortal(rv); /* Schedule for freeing later */
7391 =for apidoc sv_unref
7393 Unsets the RV status of the SV, and decrements the reference count of
7394 whatever was being referenced by the RV. This can almost be thought of
7395 as a reversal of C<newSVrv>. This is C<sv_unref_flags> with the C<flag>
7396 being zero. See C<SvROK_off>.
7402 Perl_sv_unref(pTHX_ SV *sv)
7404 sv_unref_flags(sv, 0);
7408 =for apidoc sv_taint
7410 Taint an SV. Use C<SvTAINTED_on> instead.
7415 Perl_sv_taint(pTHX_ SV *sv)
7417 sv_magic((sv), Nullsv, PERL_MAGIC_taint, Nullch, 0);
7421 =for apidoc sv_untaint
7423 Untaint an SV. Use C<SvTAINTED_off> instead.
7428 Perl_sv_untaint(pTHX_ SV *sv)
7430 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) {
7431 MAGIC *mg = mg_find(sv, PERL_MAGIC_taint);
7438 =for apidoc sv_tainted
7440 Test an SV for taintedness. Use C<SvTAINTED> instead.
7445 Perl_sv_tainted(pTHX_ SV *sv)
7447 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) {
7448 MAGIC *mg = mg_find(sv, PERL_MAGIC_taint);
7449 if (mg && ((mg->mg_len & 1) || ((mg->mg_len & 2) && mg->mg_obj == sv)))
7455 #if defined(PERL_IMPLICIT_CONTEXT)
7457 /* pTHX_ magic can't cope with varargs, so this is a no-context
7458 * version of the main function, (which may itself be aliased to us).
7459 * Don't access this version directly.
7463 Perl_sv_setpvf_nocontext(SV *sv, const char* pat, ...)
7467 va_start(args, pat);
7468 sv_vsetpvf(sv, pat, &args);
7472 /* pTHX_ magic can't cope with varargs, so this is a no-context
7473 * version of the main function, (which may itself be aliased to us).
7474 * Don't access this version directly.
7478 Perl_sv_setpvf_mg_nocontext(SV *sv, const char* pat, ...)
7482 va_start(args, pat);
7483 sv_vsetpvf_mg(sv, pat, &args);
7489 =for apidoc sv_setpvf
7491 Processes its arguments like C<sprintf> and sets an SV to the formatted
7492 output. Does not handle 'set' magic. See C<sv_setpvf_mg>.
7498 Perl_sv_setpvf(pTHX_ SV *sv, const char* pat, ...)
7501 va_start(args, pat);
7502 sv_vsetpvf(sv, pat, &args);
7506 /* backend for C<sv_setpvf> and C<sv_setpvf_nocontext> */
7509 Perl_sv_vsetpvf(pTHX_ SV *sv, const char* pat, va_list* args)
7511 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
7515 =for apidoc sv_setpvf_mg
7517 Like C<sv_setpvf>, but also handles 'set' magic.
7523 Perl_sv_setpvf_mg(pTHX_ SV *sv, const char* pat, ...)
7526 va_start(args, pat);
7527 sv_vsetpvf_mg(sv, pat, &args);
7531 /* backend for C<sv_setpvf_mg> C<setpvf_mg_nocontext> */
7534 Perl_sv_vsetpvf_mg(pTHX_ SV *sv, const char* pat, va_list* args)
7536 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
7540 #if defined(PERL_IMPLICIT_CONTEXT)
7542 /* pTHX_ magic can't cope with varargs, so this is a no-context
7543 * version of the main function, (which may itself be aliased to us).
7544 * Don't access this version directly.
7548 Perl_sv_catpvf_nocontext(SV *sv, const char* pat, ...)
7552 va_start(args, pat);
7553 sv_vcatpvf(sv, pat, &args);
7557 /* pTHX_ magic can't cope with varargs, so this is a no-context
7558 * version of the main function, (which may itself be aliased to us).
7559 * Don't access this version directly.
7563 Perl_sv_catpvf_mg_nocontext(SV *sv, const char* pat, ...)
7567 va_start(args, pat);
7568 sv_vcatpvf_mg(sv, pat, &args);
7574 =for apidoc sv_catpvf
7576 Processes its arguments like C<sprintf> and appends the formatted
7577 output to an SV. If the appended data contains "wide" characters
7578 (including, but not limited to, SVs with a UTF-8 PV formatted with %s,
7579 and characters >255 formatted with %c), the original SV might get
7580 upgraded to UTF-8. Handles 'get' magic, but not 'set' magic.
7581 C<SvSETMAGIC()> must typically be called after calling this function
7582 to handle 'set' magic.
7587 Perl_sv_catpvf(pTHX_ SV *sv, const char* pat, ...)
7590 va_start(args, pat);
7591 sv_vcatpvf(sv, pat, &args);
7595 /* backend for C<sv_catpvf> and C<catpvf_mg_nocontext> */
7598 Perl_sv_vcatpvf(pTHX_ SV *sv, const char* pat, va_list* args)
7600 sv_vcatpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
7604 =for apidoc sv_catpvf_mg
7606 Like C<sv_catpvf>, but also handles 'set' magic.
7612 Perl_sv_catpvf_mg(pTHX_ SV *sv, const char* pat, ...)
7615 va_start(args, pat);
7616 sv_vcatpvf_mg(sv, pat, &args);
7620 /* backend for C<catpvf_mg> and C<catpvf_mg_nocontext> */
7623 Perl_sv_vcatpvf_mg(pTHX_ SV *sv, const char* pat, va_list* args)
7625 sv_vcatpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
7630 =for apidoc sv_vsetpvfn
7632 Works like C<vcatpvfn> but copies the text into the SV instead of
7635 Usually used via one of its frontends C<sv_setpvf> and C<sv_setpvf_mg>.
7641 Perl_sv_vsetpvfn(pTHX_ SV *sv, const char *pat, STRLEN patlen, va_list *args, SV **svargs, I32 svmax, bool *maybe_tainted)
7643 sv_setpvn(sv, "", 0);
7644 sv_vcatpvfn(sv, pat, patlen, args, svargs, svmax, maybe_tainted);
7647 /* private function for use in sv_vcatpvfn via the EXPECT_NUMBER macro */
7650 S_expect_number(pTHX_ char** pattern)
7653 switch (**pattern) {
7654 case '1': case '2': case '3':
7655 case '4': case '5': case '6':
7656 case '7': case '8': case '9':
7657 while (isDIGIT(**pattern))
7658 var = var * 10 + (*(*pattern)++ - '0');
7662 #define EXPECT_NUMBER(pattern, var) (var = S_expect_number(aTHX_ &pattern))
7665 =for apidoc sv_vcatpvfn
7667 Processes its arguments like C<vsprintf> and appends the formatted output
7668 to an SV. Uses an array of SVs if the C style variable argument list is
7669 missing (NULL). When running with taint checks enabled, indicates via
7670 C<maybe_tainted> if results are untrustworthy (often due to the use of
7673 Usually used via one of its frontends C<sv_catpvf> and C<sv_catpvf_mg>.
7679 Perl_sv_vcatpvfn(pTHX_ SV *sv, const char *pat, STRLEN patlen, va_list *args, SV **svargs, I32 svmax, bool *maybe_tainted)
7686 static char nullstr[] = "(null)";
7688 bool has_utf8 = FALSE; /* has the result utf8? */
7690 /* no matter what, this is a string now */
7691 (void)SvPV_force(sv, origlen);
7693 /* special-case "", "%s", and "%_" */
7696 if (patlen == 2 && pat[0] == '%') {
7700 char *s = va_arg(*args, char*);
7701 sv_catpv(sv, s ? s : nullstr);
7703 else if (svix < svmax) {
7704 sv_catsv(sv, *svargs);
7705 if (DO_UTF8(*svargs))
7711 argsv = va_arg(*args, SV*);
7712 sv_catsv(sv, argsv);
7717 /* See comment on '_' below */
7722 if (!args && svix < svmax && DO_UTF8(*svargs))
7725 patend = (char*)pat + patlen;
7726 for (p = (char*)pat; p < patend; p = q) {
7729 bool vectorize = FALSE;
7730 bool vectorarg = FALSE;
7731 bool vec_utf8 = FALSE;
7737 bool has_precis = FALSE;
7739 bool is_utf8 = FALSE; /* is this item utf8? */
7742 U8 utf8buf[UTF8_MAXLEN+1];
7743 STRLEN esignlen = 0;
7745 char *eptr = Nullch;
7747 /* Times 4: a decimal digit takes more than 3 binary digits.
7748 * NV_DIG: mantissa takes than many decimal digits.
7749 * Plus 32: Playing safe. */
7750 char ebuf[IV_DIG * 4 + NV_DIG + 32];
7751 /* large enough for "%#.#f" --chip */
7752 /* what about long double NVs? --jhi */
7755 U8 *vecstr = Null(U8*);
7762 /* we need a long double target in case HAS_LONG_DOUBLE but
7765 #if defined(HAS_LONG_DOUBLE) && LONG_DOUBLESIZE > DOUBLESIZE
7774 STRLEN dotstrlen = 1;
7775 I32 efix = 0; /* explicit format parameter index */
7776 I32 ewix = 0; /* explicit width index */
7777 I32 epix = 0; /* explicit precision index */
7778 I32 evix = 0; /* explicit vector index */
7779 bool asterisk = FALSE;
7781 /* echo everything up to the next format specification */
7782 for (q = p; q < patend && *q != '%'; ++q) ;
7784 sv_catpvn(sv, p, q - p);
7791 We allow format specification elements in this order:
7792 \d+\$ explicit format parameter index
7794 v|*(\d+\$)?v vector with optional (optionally specified) arg
7795 \d+|\*(\d+\$)? width using optional (optionally specified) arg
7796 \.(\d*|\*(\d+\$)?) precision using optional (optionally specified) arg
7798 [%bcdefginopsux_DFOUX] format (mandatory)
7800 if (EXPECT_NUMBER(q, width)) {
7841 if (EXPECT_NUMBER(q, ewix))
7850 if ((vectorarg = asterisk)) {
7860 EXPECT_NUMBER(q, width);
7865 vecsv = va_arg(*args, SV*);
7867 vecsv = (evix ? evix <= svmax : svix < svmax) ?
7868 svargs[ewix ? ewix-1 : svix++] : &PL_sv_undef;
7869 dotstr = SvPVx(vecsv, dotstrlen);
7874 vecsv = va_arg(*args, SV*);
7875 vecstr = (U8*)SvPVx(vecsv,veclen);
7876 vec_utf8 = DO_UTF8(vecsv);
7878 else if (efix ? efix <= svmax : svix < svmax) {
7879 vecsv = svargs[efix ? efix-1 : svix++];
7880 vecstr = (U8*)SvPVx(vecsv,veclen);
7881 vec_utf8 = DO_UTF8(vecsv);
7891 i = va_arg(*args, int);
7893 i = (ewix ? ewix <= svmax : svix < svmax) ?
7894 SvIVx(svargs[ewix ? ewix-1 : svix++]) : 0;
7896 width = (i < 0) ? -i : i;
7906 if (EXPECT_NUMBER(q, epix) && *q++ != '$')
7908 /* XXX: todo, support specified precision parameter */
7912 i = va_arg(*args, int);
7914 i = (ewix ? ewix <= svmax : svix < svmax)
7915 ? SvIVx(svargs[ewix ? ewix-1 : svix++]) : 0;
7916 precis = (i < 0) ? 0 : i;
7921 precis = precis * 10 + (*q++ - '0');
7930 case 'I': /* Ix, I32x, and I64x */
7932 if (q[1] == '6' && q[2] == '4') {
7938 if (q[1] == '3' && q[2] == '2') {
7948 #if defined(HAS_QUAD) || defined(HAS_LONG_DOUBLE)
7959 #if defined(HAS_QUAD) || defined(HAS_LONG_DOUBLE)
7960 if (*(q + 1) == 'l') { /* lld, llf */
7985 argsv = (efix ? efix <= svmax : svix < svmax) ?
7986 svargs[efix ? efix-1 : svix++] : &PL_sv_undef;
7993 uv = (args && !vectorize) ? va_arg(*args, int) : SvIVx(argsv);
7995 (!UNI_IS_INVARIANT(uv) && SvUTF8(sv)))
7997 eptr = (char*)utf8buf;
7998 elen = uvchr_to_utf8((U8*)eptr, uv) - utf8buf;
8009 if (args && !vectorize) {
8010 eptr = va_arg(*args, char*);
8012 #ifdef MACOS_TRADITIONAL
8013 /* On MacOS, %#s format is used for Pascal strings */
8018 elen = strlen(eptr);
8021 elen = sizeof nullstr - 1;
8025 eptr = SvPVx(argsv, elen);
8026 if (DO_UTF8(argsv)) {
8027 if (has_precis && precis < elen) {
8029 sv_pos_u2b(argsv, &p, 0); /* sticks at end */
8032 if (width) { /* fudge width (can't fudge elen) */
8033 width += elen - sv_len_utf8(argsv);
8042 * The "%_" hack might have to be changed someday,
8043 * if ISO or ANSI decide to use '_' for something.
8044 * So we keep it hidden from users' code.
8046 if (!args || vectorize)
8048 argsv = va_arg(*args, SV*);
8049 eptr = SvPVx(argsv, elen);
8055 if (has_precis && elen > precis)
8062 if (alt || vectorize)
8064 uv = PTR2UV(args ? va_arg(*args, void*) : argsv);
8082 uv = utf8n_to_uvchr(vecstr, veclen, &ulen,
8091 esignbuf[esignlen++] = plus;
8095 case 'h': iv = (short)va_arg(*args, int); break;
8096 default: iv = va_arg(*args, int); break;
8097 case 'l': iv = va_arg(*args, long); break;
8098 case 'V': iv = va_arg(*args, IV); break;
8100 case 'q': iv = va_arg(*args, Quad_t); break;
8107 case 'h': iv = (short)iv; break;
8109 case 'l': iv = (long)iv; break;
8112 case 'q': iv = (Quad_t)iv; break;
8116 if ( !vectorize ) /* we already set uv above */
8121 esignbuf[esignlen++] = plus;
8125 esignbuf[esignlen++] = '-';
8168 uv = utf8n_to_uvchr(vecstr, veclen, &ulen,
8179 case 'h': uv = (unsigned short)va_arg(*args, unsigned); break;
8180 default: uv = va_arg(*args, unsigned); break;
8181 case 'l': uv = va_arg(*args, unsigned long); break;
8182 case 'V': uv = va_arg(*args, UV); break;
8184 case 'q': uv = va_arg(*args, Quad_t); break;
8191 case 'h': uv = (unsigned short)uv; break;
8193 case 'l': uv = (unsigned long)uv; break;
8196 case 'q': uv = (Quad_t)uv; break;
8202 eptr = ebuf + sizeof ebuf;
8208 p = (char*)((c == 'X')
8209 ? "0123456789ABCDEF" : "0123456789abcdef");
8215 esignbuf[esignlen++] = '0';
8216 esignbuf[esignlen++] = c; /* 'x' or 'X' */
8222 *--eptr = '0' + dig;
8224 if (alt && *eptr != '0')
8230 *--eptr = '0' + dig;
8233 esignbuf[esignlen++] = '0';
8234 esignbuf[esignlen++] = 'b';
8237 default: /* it had better be ten or less */
8238 #if defined(PERL_Y2KWARN)
8239 if (ckWARN(WARN_Y2K)) {
8241 char *s = SvPV(sv,n);
8242 if (n >= 2 && s[n-2] == '1' && s[n-1] == '9'
8243 && (n == 2 || !isDIGIT(s[n-3])))
8245 Perl_warner(aTHX_ packWARN(WARN_Y2K),
8246 "Possible Y2K bug: %%%c %s",
8247 c, "format string following '19'");
8253 *--eptr = '0' + dig;
8254 } while (uv /= base);
8257 elen = (ebuf + sizeof ebuf) - eptr;
8260 zeros = precis - elen;
8261 else if (precis == 0 && elen == 1 && *eptr == '0')
8266 /* FLOATING POINT */
8269 c = 'f'; /* maybe %F isn't supported here */
8275 /* This is evil, but floating point is even more evil */
8277 /* for SV-style calling, we can only get NV
8278 for C-style calling, we assume %f is double;
8279 for simplicity we allow any of %Lf, %llf, %qf for long double
8283 #if defined(USE_LONG_DOUBLE)
8288 #if defined(USE_LONG_DOUBLE)
8289 intsize = args ? 0 : 'q';
8293 #if defined(HAS_LONG_DOUBLE)
8304 /* now we need (long double) if intsize == 'q', else (double) */
8305 nv = (args && !vectorize) ?
8306 #if LONG_DOUBLESIZE > DOUBLESIZE
8308 va_arg(*args, long double) :
8309 va_arg(*args, double)
8311 va_arg(*args, double)
8317 if (c != 'e' && c != 'E') {
8319 /* FIXME: if HAS_LONG_DOUBLE but not USE_LONG_DOUBLE this
8320 will cast our (long double) to (double) */
8321 (void)Perl_frexp(nv, &i);
8322 if (i == PERL_INT_MIN)
8323 Perl_die(aTHX_ "panic: frexp");
8325 need = BIT_DIGITS(i);
8327 need += has_precis ? precis : 6; /* known default */
8331 need += 20; /* fudge factor */
8332 if (PL_efloatsize < need) {
8333 Safefree(PL_efloatbuf);
8334 PL_efloatsize = need + 20; /* more fudge */
8335 New(906, PL_efloatbuf, PL_efloatsize, char);
8336 PL_efloatbuf[0] = '\0';
8339 eptr = ebuf + sizeof ebuf;
8342 /* FIXME: what to do if HAS_LONG_DOUBLE but not PERL_PRIfldbl? */
8343 #if defined(HAS_LONG_DOUBLE) && defined(PERL_PRIfldbl)
8344 if (intsize == 'q') {
8345 /* Copy the one or more characters in a long double
8346 * format before the 'base' ([efgEFG]) character to
8347 * the format string. */
8348 static char const prifldbl[] = PERL_PRIfldbl;
8349 char const *p = prifldbl + sizeof(prifldbl) - 3;
8350 while (p >= prifldbl) { *--eptr = *p--; }
8355 do { *--eptr = '0' + (base % 10); } while (base /= 10);
8360 do { *--eptr = '0' + (base % 10); } while (base /= 10);
8372 /* No taint. Otherwise we are in the strange situation
8373 * where printf() taints but print($float) doesn't.
8375 #if defined(HAS_LONG_DOUBLE)
8377 (void)sprintf(PL_efloatbuf, eptr, nv);
8379 (void)sprintf(PL_efloatbuf, eptr, (double)nv);
8381 (void)sprintf(PL_efloatbuf, eptr, nv);
8383 eptr = PL_efloatbuf;
8384 elen = strlen(PL_efloatbuf);
8390 i = SvCUR(sv) - origlen;
8391 if (args && !vectorize) {
8393 case 'h': *(va_arg(*args, short*)) = i; break;
8394 default: *(va_arg(*args, int*)) = i; break;
8395 case 'l': *(va_arg(*args, long*)) = i; break;
8396 case 'V': *(va_arg(*args, IV*)) = i; break;
8398 case 'q': *(va_arg(*args, Quad_t*)) = i; break;
8403 sv_setuv_mg(argsv, (UV)i);
8405 continue; /* not "break" */
8412 if (!args && ckWARN(WARN_PRINTF) &&
8413 (PL_op->op_type == OP_PRTF || PL_op->op_type == OP_SPRINTF)) {
8414 SV *msg = sv_newmortal();
8415 Perl_sv_setpvf(aTHX_ msg, "Invalid conversion in %s: ",
8416 (PL_op->op_type == OP_PRTF) ? "printf" : "sprintf");
8419 Perl_sv_catpvf(aTHX_ msg,
8420 "\"%%%c\"", c & 0xFF);
8422 Perl_sv_catpvf(aTHX_ msg,
8423 "\"%%\\%03"UVof"\"",
8426 sv_catpv(msg, "end of string");
8427 Perl_warner(aTHX_ packWARN(WARN_PRINTF), "%"SVf, msg); /* yes, this is reentrant */
8430 /* output mangled stuff ... */
8436 /* ... right here, because formatting flags should not apply */
8437 SvGROW(sv, SvCUR(sv) + elen + 1);
8439 Copy(eptr, p, elen, char);
8442 SvCUR(sv) = p - SvPVX(sv);
8443 continue; /* not "break" */
8446 if (is_utf8 != has_utf8) {
8449 sv_utf8_upgrade(sv);
8452 SV *nsv = sv_2mortal(newSVpvn(eptr, elen));
8453 sv_utf8_upgrade(nsv);
8457 SvGROW(sv, SvCUR(sv) + elen + 1);
8462 have = esignlen + zeros + elen;
8463 need = (have > width ? have : width);
8466 SvGROW(sv, SvCUR(sv) + need + dotstrlen + 1);
8468 if (esignlen && fill == '0') {
8469 for (i = 0; i < (int)esignlen; i++)
8473 memset(p, fill, gap);
8476 if (esignlen && fill != '0') {
8477 for (i = 0; i < (int)esignlen; i++)
8481 for (i = zeros; i; i--)
8485 Copy(eptr, p, elen, char);
8489 memset(p, ' ', gap);
8494 Copy(dotstr, p, dotstrlen, char);
8498 vectorize = FALSE; /* done iterating over vecstr */
8505 SvCUR(sv) = p - SvPVX(sv);
8513 /* =========================================================================
8515 =head1 Cloning an interpreter
8517 All the macros and functions in this section are for the private use of
8518 the main function, perl_clone().
8520 The foo_dup() functions make an exact copy of an existing foo thinngy.
8521 During the course of a cloning, a hash table is used to map old addresses
8522 to new addresses. The table is created and manipulated with the
8523 ptr_table_* functions.
8527 ============================================================================*/
8530 #if defined(USE_ITHREADS)
8532 #if defined(USE_5005THREADS)
8533 # include "error: USE_5005THREADS and USE_ITHREADS are incompatible"
8536 #ifndef GpREFCNT_inc
8537 # define GpREFCNT_inc(gp) ((gp) ? (++(gp)->gp_refcnt, (gp)) : (GP*)NULL)
8541 #define sv_dup_inc(s,t) SvREFCNT_inc(sv_dup(s,t))
8542 #define av_dup(s,t) (AV*)sv_dup((SV*)s,t)
8543 #define av_dup_inc(s,t) (AV*)SvREFCNT_inc(sv_dup((SV*)s,t))
8544 #define hv_dup(s,t) (HV*)sv_dup((SV*)s,t)
8545 #define hv_dup_inc(s,t) (HV*)SvREFCNT_inc(sv_dup((SV*)s,t))
8546 #define cv_dup(s,t) (CV*)sv_dup((SV*)s,t)
8547 #define cv_dup_inc(s,t) (CV*)SvREFCNT_inc(sv_dup((SV*)s,t))
8548 #define io_dup(s,t) (IO*)sv_dup((SV*)s,t)
8549 #define io_dup_inc(s,t) (IO*)SvREFCNT_inc(sv_dup((SV*)s,t))
8550 #define gv_dup(s,t) (GV*)sv_dup((SV*)s,t)
8551 #define gv_dup_inc(s,t) (GV*)SvREFCNT_inc(sv_dup((SV*)s,t))
8552 #define SAVEPV(p) (p ? savepv(p) : Nullch)
8553 #define SAVEPVN(p,n) (p ? savepvn(p,n) : Nullch)
8556 /* Duplicate a regexp. Required reading: pregcomp() and pregfree() in
8557 regcomp.c. AMS 20010712 */
8560 Perl_re_dup(pTHX_ REGEXP *r, CLONE_PARAMS *param)
8564 struct reg_substr_datum *s;
8567 return (REGEXP *)NULL;
8569 if ((ret = (REGEXP *)ptr_table_fetch(PL_ptr_table, r)))
8572 len = r->offsets[0];
8573 npar = r->nparens+1;
8575 Newc(0, ret, sizeof(regexp) + (len+1)*sizeof(regnode), char, regexp);
8576 Copy(r->program, ret->program, len+1, regnode);
8578 New(0, ret->startp, npar, I32);
8579 Copy(r->startp, ret->startp, npar, I32);
8580 New(0, ret->endp, npar, I32);
8581 Copy(r->startp, ret->startp, npar, I32);
8583 New(0, ret->substrs, 1, struct reg_substr_data);
8584 for (s = ret->substrs->data, i = 0; i < 3; i++, s++) {
8585 s->min_offset = r->substrs->data[i].min_offset;
8586 s->max_offset = r->substrs->data[i].max_offset;
8587 s->substr = sv_dup_inc(r->substrs->data[i].substr, param);
8588 s->utf8_substr = sv_dup_inc(r->substrs->data[i].utf8_substr, param);
8591 ret->regstclass = NULL;
8594 int count = r->data->count;
8596 Newc(0, d, sizeof(struct reg_data) + count*sizeof(void *),
8597 char, struct reg_data);
8598 New(0, d->what, count, U8);
8601 for (i = 0; i < count; i++) {
8602 d->what[i] = r->data->what[i];
8603 switch (d->what[i]) {
8605 d->data[i] = sv_dup_inc((SV *)r->data->data[i], param);
8608 d->data[i] = av_dup_inc((AV *)r->data->data[i], param);
8611 /* This is cheating. */
8612 New(0, d->data[i], 1, struct regnode_charclass_class);
8613 StructCopy(r->data->data[i], d->data[i],
8614 struct regnode_charclass_class);
8615 ret->regstclass = (regnode*)d->data[i];
8618 /* Compiled op trees are readonly, and can thus be
8619 shared without duplication. */
8620 d->data[i] = (void*)OpREFCNT_inc((OP*)r->data->data[i]);
8623 d->data[i] = r->data->data[i];
8633 New(0, ret->offsets, 2*len+1, U32);
8634 Copy(r->offsets, ret->offsets, 2*len+1, U32);
8636 ret->precomp = SAVEPV(r->precomp);
8637 ret->refcnt = r->refcnt;
8638 ret->minlen = r->minlen;
8639 ret->prelen = r->prelen;
8640 ret->nparens = r->nparens;
8641 ret->lastparen = r->lastparen;
8642 ret->lastcloseparen = r->lastcloseparen;
8643 ret->reganch = r->reganch;
8645 ret->sublen = r->sublen;
8647 if (RX_MATCH_COPIED(ret))
8648 ret->subbeg = SAVEPV(r->subbeg);
8650 ret->subbeg = Nullch;
8652 ptr_table_store(PL_ptr_table, r, ret);
8656 /* duplicate a file handle */
8659 Perl_fp_dup(pTHX_ PerlIO *fp, char type, CLONE_PARAMS *param)
8663 return (PerlIO*)NULL;
8665 /* look for it in the table first */
8666 ret = (PerlIO*)ptr_table_fetch(PL_ptr_table, fp);
8670 /* create anew and remember what it is */
8671 ret = PerlIO_fdupopen(aTHX_ fp, param, PERLIO_DUP_CLONE);
8672 ptr_table_store(PL_ptr_table, fp, ret);
8676 /* duplicate a directory handle */
8679 Perl_dirp_dup(pTHX_ DIR *dp)
8687 /* duplicate a typeglob */
8690 Perl_gp_dup(pTHX_ GP *gp, CLONE_PARAMS* param)
8695 /* look for it in the table first */
8696 ret = (GP*)ptr_table_fetch(PL_ptr_table, gp);
8700 /* create anew and remember what it is */
8701 Newz(0, ret, 1, GP);
8702 ptr_table_store(PL_ptr_table, gp, ret);
8705 ret->gp_refcnt = 0; /* must be before any other dups! */
8706 ret->gp_sv = sv_dup_inc(gp->gp_sv, param);
8707 ret->gp_io = io_dup_inc(gp->gp_io, param);
8708 ret->gp_form = cv_dup_inc(gp->gp_form, param);
8709 ret->gp_av = av_dup_inc(gp->gp_av, param);
8710 ret->gp_hv = hv_dup_inc(gp->gp_hv, param);
8711 ret->gp_egv = gv_dup(gp->gp_egv, param);/* GvEGV is not refcounted */
8712 ret->gp_cv = cv_dup_inc(gp->gp_cv, param);
8713 ret->gp_cvgen = gp->gp_cvgen;
8714 ret->gp_flags = gp->gp_flags;
8715 ret->gp_line = gp->gp_line;
8716 ret->gp_file = gp->gp_file; /* points to COP.cop_file */
8720 /* duplicate a chain of magic */
8723 Perl_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS* param)
8725 MAGIC *mgprev = (MAGIC*)NULL;
8728 return (MAGIC*)NULL;
8729 /* look for it in the table first */
8730 mgret = (MAGIC*)ptr_table_fetch(PL_ptr_table, mg);
8734 for (; mg; mg = mg->mg_moremagic) {
8736 Newz(0, nmg, 1, MAGIC);
8738 mgprev->mg_moremagic = nmg;
8741 nmg->mg_virtual = mg->mg_virtual; /* XXX copy dynamic vtable? */
8742 nmg->mg_private = mg->mg_private;
8743 nmg->mg_type = mg->mg_type;
8744 nmg->mg_flags = mg->mg_flags;
8745 if (mg->mg_type == PERL_MAGIC_qr) {
8746 nmg->mg_obj = (SV*)re_dup((REGEXP*)mg->mg_obj, param);
8748 else if(mg->mg_type == PERL_MAGIC_backref) {
8749 AV *av = (AV*) mg->mg_obj;
8752 nmg->mg_obj = (SV*)newAV();
8756 av_push((AV*)nmg->mg_obj,sv_dup(svp[i],param));
8761 nmg->mg_obj = (mg->mg_flags & MGf_REFCOUNTED)
8762 ? sv_dup_inc(mg->mg_obj, param)
8763 : sv_dup(mg->mg_obj, param);
8765 nmg->mg_len = mg->mg_len;
8766 nmg->mg_ptr = mg->mg_ptr; /* XXX random ptr? */
8767 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
8768 if (mg->mg_len > 0) {
8769 nmg->mg_ptr = SAVEPVN(mg->mg_ptr, mg->mg_len);
8770 if (mg->mg_type == PERL_MAGIC_overload_table &&
8771 AMT_AMAGIC((AMT*)mg->mg_ptr))
8773 AMT *amtp = (AMT*)mg->mg_ptr;
8774 AMT *namtp = (AMT*)nmg->mg_ptr;
8776 for (i = 1; i < NofAMmeth; i++) {
8777 namtp->table[i] = cv_dup_inc(amtp->table[i], param);
8781 else if (mg->mg_len == HEf_SVKEY)
8782 nmg->mg_ptr = (char*)sv_dup_inc((SV*)mg->mg_ptr, param);
8784 if ((mg->mg_flags & MGf_DUP) && mg->mg_virtual && mg->mg_virtual->svt_dup) {
8785 CALL_FPTR(nmg->mg_virtual->svt_dup)(aTHX_ nmg, param);
8792 /* create a new pointer-mapping table */
8795 Perl_ptr_table_new(pTHX)
8798 Newz(0, tbl, 1, PTR_TBL_t);
8801 Newz(0, tbl->tbl_ary, tbl->tbl_max + 1, PTR_TBL_ENT_t*);
8805 /* map an existing pointer using a table */
8808 Perl_ptr_table_fetch(pTHX_ PTR_TBL_t *tbl, void *sv)
8810 PTR_TBL_ENT_t *tblent;
8811 UV hash = PTR2UV(sv);
8813 tblent = tbl->tbl_ary[hash & tbl->tbl_max];
8814 for (; tblent; tblent = tblent->next) {
8815 if (tblent->oldval == sv)
8816 return tblent->newval;
8821 /* add a new entry to a pointer-mapping table */
8824 Perl_ptr_table_store(pTHX_ PTR_TBL_t *tbl, void *oldv, void *newv)
8826 PTR_TBL_ENT_t *tblent, **otblent;
8827 /* XXX this may be pessimal on platforms where pointers aren't good
8828 * hash values e.g. if they grow faster in the most significant
8830 UV hash = PTR2UV(oldv);
8834 otblent = &tbl->tbl_ary[hash & tbl->tbl_max];
8835 for (tblent = *otblent; tblent; i=0, tblent = tblent->next) {
8836 if (tblent->oldval == oldv) {
8837 tblent->newval = newv;
8841 Newz(0, tblent, 1, PTR_TBL_ENT_t);
8842 tblent->oldval = oldv;
8843 tblent->newval = newv;
8844 tblent->next = *otblent;
8847 if (i && tbl->tbl_items > tbl->tbl_max)
8848 ptr_table_split(tbl);
8851 /* double the hash bucket size of an existing ptr table */
8854 Perl_ptr_table_split(pTHX_ PTR_TBL_t *tbl)
8856 PTR_TBL_ENT_t **ary = tbl->tbl_ary;
8857 UV oldsize = tbl->tbl_max + 1;
8858 UV newsize = oldsize * 2;
8861 Renew(ary, newsize, PTR_TBL_ENT_t*);
8862 Zero(&ary[oldsize], newsize-oldsize, PTR_TBL_ENT_t*);
8863 tbl->tbl_max = --newsize;
8865 for (i=0; i < oldsize; i++, ary++) {
8866 PTR_TBL_ENT_t **curentp, **entp, *ent;
8869 curentp = ary + oldsize;
8870 for (entp = ary, ent = *ary; ent; ent = *entp) {
8871 if ((newsize & PTR2UV(ent->oldval)) != i) {
8873 ent->next = *curentp;
8883 /* remove all the entries from a ptr table */
8886 Perl_ptr_table_clear(pTHX_ PTR_TBL_t *tbl)
8888 register PTR_TBL_ENT_t **array;
8889 register PTR_TBL_ENT_t *entry;
8890 register PTR_TBL_ENT_t *oentry = Null(PTR_TBL_ENT_t*);
8894 if (!tbl || !tbl->tbl_items) {
8898 array = tbl->tbl_ary;
8905 entry = entry->next;
8909 if (++riter > max) {
8912 entry = array[riter];
8919 /* clear and free a ptr table */
8922 Perl_ptr_table_free(pTHX_ PTR_TBL_t *tbl)
8927 ptr_table_clear(tbl);
8928 Safefree(tbl->tbl_ary);
8936 /* attempt to make everything in the typeglob readonly */
8939 S_gv_share(pTHX_ SV *sstr, CLONE_PARAMS *param)
8942 SV *sv = ¶m->proto_perl->Isv_no; /* just need SvREADONLY-ness */
8944 if (GvIO(gv) || GvFORM(gv)) {
8945 GvUNIQUE_off(gv); /* GvIOs cannot be shared. nor can GvFORMs */
8947 else if (!GvCV(gv)) {
8951 /* CvPADLISTs cannot be shared */
8952 if (!SvREADONLY(GvCV(gv)) && !CvXSUB(GvCV(gv))) {
8957 if (!GvUNIQUE(gv)) {
8959 PerlIO_printf(Perl_debug_log, "gv_share: unable to share %s::%s\n",
8960 HvNAME(GvSTASH(gv)), GvNAME(gv));
8966 * write attempts will die with
8967 * "Modification of a read-only value attempted"
8973 SvREADONLY_on(GvSV(gv));
8980 SvREADONLY_on(GvAV(gv));
8987 SvREADONLY_on(GvAV(gv));
8990 return sstr; /* he_dup() will SvREFCNT_inc() */
8993 /* duplicate an SV of any type (including AV, HV etc) */
8996 Perl_rvpv_dup(pTHX_ SV *dstr, SV *sstr, CLONE_PARAMS* param)
8999 SvRV(dstr) = SvWEAKREF(sstr)
9000 ? sv_dup(SvRV(sstr), param)
9001 : sv_dup_inc(SvRV(sstr), param);
9003 else if (SvPVX(sstr)) {
9004 /* Has something there */
9006 /* Normal PV - clone whole allocated space */
9007 SvPVX(dstr) = SAVEPVN(SvPVX(sstr), SvLEN(sstr)-1);
9010 /* Special case - not normally malloced for some reason */
9011 if (SvREADONLY(sstr) && SvFAKE(sstr)) {
9012 /* A "shared" PV - clone it as unshared string */
9014 SvREADONLY_off(dstr);
9015 SvPVX(dstr) = SAVEPVN(SvPVX(sstr), SvCUR(sstr));
9018 /* Some other special case - random pointer */
9019 SvPVX(dstr) = SvPVX(sstr);
9025 SvPVX(dstr) = SvPVX(sstr);
9030 Perl_sv_dup(pTHX_ SV *sstr, CLONE_PARAMS* param)
9034 if (!sstr || SvTYPE(sstr) == SVTYPEMASK)
9036 /* look for it in the table first */
9037 dstr = (SV*)ptr_table_fetch(PL_ptr_table, sstr);
9041 /* create anew and remember what it is */
9043 ptr_table_store(PL_ptr_table, sstr, dstr);
9046 SvFLAGS(dstr) = SvFLAGS(sstr);
9047 SvFLAGS(dstr) &= ~SVf_OOK; /* don't propagate OOK hack */
9048 SvREFCNT(dstr) = 0; /* must be before any other dups! */
9051 if (SvANY(sstr) && PL_watch_pvx && SvPVX(sstr) == PL_watch_pvx)
9052 PerlIO_printf(Perl_debug_log, "watch at %p hit, found string \"%s\"\n",
9053 PL_watch_pvx, SvPVX(sstr));
9056 switch (SvTYPE(sstr)) {
9061 SvANY(dstr) = new_XIV();
9062 SvIVX(dstr) = SvIVX(sstr);
9065 SvANY(dstr) = new_XNV();
9066 SvNVX(dstr) = SvNVX(sstr);
9069 SvANY(dstr) = new_XRV();
9070 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9073 SvANY(dstr) = new_XPV();
9074 SvCUR(dstr) = SvCUR(sstr);
9075 SvLEN(dstr) = SvLEN(sstr);
9076 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9079 SvANY(dstr) = new_XPVIV();
9080 SvCUR(dstr) = SvCUR(sstr);
9081 SvLEN(dstr) = SvLEN(sstr);
9082 SvIVX(dstr) = SvIVX(sstr);
9083 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9086 SvANY(dstr) = new_XPVNV();
9087 SvCUR(dstr) = SvCUR(sstr);
9088 SvLEN(dstr) = SvLEN(sstr);
9089 SvIVX(dstr) = SvIVX(sstr);
9090 SvNVX(dstr) = SvNVX(sstr);
9091 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9094 SvANY(dstr) = new_XPVMG();
9095 SvCUR(dstr) = SvCUR(sstr);
9096 SvLEN(dstr) = SvLEN(sstr);
9097 SvIVX(dstr) = SvIVX(sstr);
9098 SvNVX(dstr) = SvNVX(sstr);
9099 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9100 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9101 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9104 SvANY(dstr) = new_XPVBM();
9105 SvCUR(dstr) = SvCUR(sstr);
9106 SvLEN(dstr) = SvLEN(sstr);
9107 SvIVX(dstr) = SvIVX(sstr);
9108 SvNVX(dstr) = SvNVX(sstr);
9109 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9110 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9111 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9112 BmRARE(dstr) = BmRARE(sstr);
9113 BmUSEFUL(dstr) = BmUSEFUL(sstr);
9114 BmPREVIOUS(dstr)= BmPREVIOUS(sstr);
9117 SvANY(dstr) = new_XPVLV();
9118 SvCUR(dstr) = SvCUR(sstr);
9119 SvLEN(dstr) = SvLEN(sstr);
9120 SvIVX(dstr) = SvIVX(sstr);
9121 SvNVX(dstr) = SvNVX(sstr);
9122 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9123 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9124 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9125 LvTARGOFF(dstr) = LvTARGOFF(sstr); /* XXX sometimes holds PMOP* when DEBUGGING */
9126 LvTARGLEN(dstr) = LvTARGLEN(sstr);
9127 LvTARG(dstr) = sv_dup_inc(LvTARG(sstr), param);
9128 LvTYPE(dstr) = LvTYPE(sstr);
9131 if (GvUNIQUE((GV*)sstr)) {
9133 if ((share = gv_share(sstr, param))) {
9136 ptr_table_store(PL_ptr_table, sstr, dstr);
9138 PerlIO_printf(Perl_debug_log, "sv_dup: sharing %s::%s\n",
9139 HvNAME(GvSTASH(share)), GvNAME(share));
9144 SvANY(dstr) = new_XPVGV();
9145 SvCUR(dstr) = SvCUR(sstr);
9146 SvLEN(dstr) = SvLEN(sstr);
9147 SvIVX(dstr) = SvIVX(sstr);
9148 SvNVX(dstr) = SvNVX(sstr);
9149 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9150 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9151 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9152 GvNAMELEN(dstr) = GvNAMELEN(sstr);
9153 GvNAME(dstr) = SAVEPVN(GvNAME(sstr), GvNAMELEN(sstr));
9154 GvSTASH(dstr) = hv_dup_inc(GvSTASH(sstr), param);
9155 GvFLAGS(dstr) = GvFLAGS(sstr);
9156 GvGP(dstr) = gp_dup(GvGP(sstr), param);
9157 (void)GpREFCNT_inc(GvGP(dstr));
9160 SvANY(dstr) = new_XPVIO();
9161 SvCUR(dstr) = SvCUR(sstr);
9162 SvLEN(dstr) = SvLEN(sstr);
9163 SvIVX(dstr) = SvIVX(sstr);
9164 SvNVX(dstr) = SvNVX(sstr);
9165 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9166 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9167 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9168 IoIFP(dstr) = fp_dup(IoIFP(sstr), IoTYPE(sstr), param);
9169 if (IoOFP(sstr) == IoIFP(sstr))
9170 IoOFP(dstr) = IoIFP(dstr);
9172 IoOFP(dstr) = fp_dup(IoOFP(sstr), IoTYPE(sstr), param);
9173 /* PL_rsfp_filters entries have fake IoDIRP() */
9174 if (IoDIRP(sstr) && !(IoFLAGS(sstr) & IOf_FAKE_DIRP))
9175 IoDIRP(dstr) = dirp_dup(IoDIRP(sstr));
9177 IoDIRP(dstr) = IoDIRP(sstr);
9178 IoLINES(dstr) = IoLINES(sstr);
9179 IoPAGE(dstr) = IoPAGE(sstr);
9180 IoPAGE_LEN(dstr) = IoPAGE_LEN(sstr);
9181 IoLINES_LEFT(dstr) = IoLINES_LEFT(sstr);
9182 IoTOP_NAME(dstr) = SAVEPV(IoTOP_NAME(sstr));
9183 IoTOP_GV(dstr) = gv_dup(IoTOP_GV(sstr), param);
9184 IoFMT_NAME(dstr) = SAVEPV(IoFMT_NAME(sstr));
9185 IoFMT_GV(dstr) = gv_dup(IoFMT_GV(sstr), param);
9186 IoBOTTOM_NAME(dstr) = SAVEPV(IoBOTTOM_NAME(sstr));
9187 IoBOTTOM_GV(dstr) = gv_dup(IoBOTTOM_GV(sstr), param);
9188 IoSUBPROCESS(dstr) = IoSUBPROCESS(sstr);
9189 IoTYPE(dstr) = IoTYPE(sstr);
9190 IoFLAGS(dstr) = IoFLAGS(sstr);
9193 SvANY(dstr) = new_XPVAV();
9194 SvCUR(dstr) = SvCUR(sstr);
9195 SvLEN(dstr) = SvLEN(sstr);
9196 SvIVX(dstr) = SvIVX(sstr);
9197 SvNVX(dstr) = SvNVX(sstr);
9198 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9199 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9200 AvARYLEN((AV*)dstr) = sv_dup_inc(AvARYLEN((AV*)sstr), param);
9201 AvFLAGS((AV*)dstr) = AvFLAGS((AV*)sstr);
9202 if (AvARRAY((AV*)sstr)) {
9203 SV **dst_ary, **src_ary;
9204 SSize_t items = AvFILLp((AV*)sstr) + 1;
9206 src_ary = AvARRAY((AV*)sstr);
9207 Newz(0, dst_ary, AvMAX((AV*)sstr)+1, SV*);
9208 ptr_table_store(PL_ptr_table, src_ary, dst_ary);
9209 SvPVX(dstr) = (char*)dst_ary;
9210 AvALLOC((AV*)dstr) = dst_ary;
9211 if (AvREAL((AV*)sstr)) {
9213 *dst_ary++ = sv_dup_inc(*src_ary++, param);
9217 *dst_ary++ = sv_dup(*src_ary++, param);
9219 items = AvMAX((AV*)sstr) - AvFILLp((AV*)sstr);
9220 while (items-- > 0) {
9221 *dst_ary++ = &PL_sv_undef;
9225 SvPVX(dstr) = Nullch;
9226 AvALLOC((AV*)dstr) = (SV**)NULL;
9230 SvANY(dstr) = new_XPVHV();
9231 SvCUR(dstr) = SvCUR(sstr);
9232 SvLEN(dstr) = SvLEN(sstr);
9233 SvIVX(dstr) = SvIVX(sstr);
9234 SvNVX(dstr) = SvNVX(sstr);
9235 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9236 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9237 HvRITER((HV*)dstr) = HvRITER((HV*)sstr);
9238 if (HvARRAY((HV*)sstr)) {
9240 XPVHV *dxhv = (XPVHV*)SvANY(dstr);
9241 XPVHV *sxhv = (XPVHV*)SvANY(sstr);
9242 Newz(0, dxhv->xhv_array,
9243 PERL_HV_ARRAY_ALLOC_BYTES(dxhv->xhv_max+1), char);
9244 while (i <= sxhv->xhv_max) {
9245 ((HE**)dxhv->xhv_array)[i] = he_dup(((HE**)sxhv->xhv_array)[i],
9246 (bool)!!HvSHAREKEYS(sstr),
9250 dxhv->xhv_eiter = he_dup(sxhv->xhv_eiter,
9251 (bool)!!HvSHAREKEYS(sstr), param);
9254 SvPVX(dstr) = Nullch;
9255 HvEITER((HV*)dstr) = (HE*)NULL;
9257 HvPMROOT((HV*)dstr) = HvPMROOT((HV*)sstr); /* XXX */
9258 HvNAME((HV*)dstr) = SAVEPV(HvNAME((HV*)sstr));
9259 /* Record stashes for possible cloning in Perl_clone(). */
9260 if(HvNAME((HV*)dstr))
9261 av_push(param->stashes, dstr);
9264 SvANY(dstr) = new_XPVFM();
9265 FmLINES(dstr) = FmLINES(sstr);
9269 SvANY(dstr) = new_XPVCV();
9271 SvCUR(dstr) = SvCUR(sstr);
9272 SvLEN(dstr) = SvLEN(sstr);
9273 SvIVX(dstr) = SvIVX(sstr);
9274 SvNVX(dstr) = SvNVX(sstr);
9275 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9276 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9277 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9278 CvSTASH(dstr) = hv_dup(CvSTASH(sstr), param); /* NOTE: not refcounted */
9279 CvSTART(dstr) = CvSTART(sstr);
9280 CvROOT(dstr) = OpREFCNT_inc(CvROOT(sstr));
9281 CvXSUB(dstr) = CvXSUB(sstr);
9282 CvXSUBANY(dstr) = CvXSUBANY(sstr);
9283 if (CvCONST(sstr)) {
9284 CvXSUBANY(dstr).any_ptr = GvUNIQUE(CvGV(sstr)) ?
9285 SvREFCNT_inc(CvXSUBANY(sstr).any_ptr) :
9286 sv_dup_inc(CvXSUBANY(sstr).any_ptr, param);
9288 CvGV(dstr) = gv_dup(CvGV(sstr), param);
9289 if (param->flags & CLONEf_COPY_STACKS) {
9290 CvDEPTH(dstr) = CvDEPTH(sstr);
9294 if (CvPADLIST(sstr) && !AvREAL(CvPADLIST(sstr))) {
9295 /* XXX padlists are real, but pretend to be not */
9296 AvREAL_on(CvPADLIST(sstr));
9297 CvPADLIST(dstr) = av_dup_inc(CvPADLIST(sstr), param);
9298 AvREAL_off(CvPADLIST(sstr));
9299 AvREAL_off(CvPADLIST(dstr));
9302 CvPADLIST(dstr) = av_dup_inc(CvPADLIST(sstr), param);
9303 if (!CvANON(sstr) || CvCLONED(sstr))
9304 CvOUTSIDE(dstr) = cv_dup_inc(CvOUTSIDE(sstr), param);
9306 CvOUTSIDE(dstr) = cv_dup(CvOUTSIDE(sstr), param);
9307 CvFLAGS(dstr) = CvFLAGS(sstr);
9308 CvFILE(dstr) = CvXSUB(sstr) ? CvFILE(sstr) : SAVEPV(CvFILE(sstr));
9311 Perl_croak(aTHX_ "Bizarre SvTYPE [%" IVdf "]", (IV)SvTYPE(sstr));
9315 if (SvOBJECT(dstr) && SvTYPE(dstr) != SVt_PVIO)
9321 /* duplicate a context */
9324 Perl_cx_dup(pTHX_ PERL_CONTEXT *cxs, I32 ix, I32 max, CLONE_PARAMS* param)
9329 return (PERL_CONTEXT*)NULL;
9331 /* look for it in the table first */
9332 ncxs = (PERL_CONTEXT*)ptr_table_fetch(PL_ptr_table, cxs);
9336 /* create anew and remember what it is */
9337 Newz(56, ncxs, max + 1, PERL_CONTEXT);
9338 ptr_table_store(PL_ptr_table, cxs, ncxs);
9341 PERL_CONTEXT *cx = &cxs[ix];
9342 PERL_CONTEXT *ncx = &ncxs[ix];
9343 ncx->cx_type = cx->cx_type;
9344 if (CxTYPE(cx) == CXt_SUBST) {
9345 Perl_croak(aTHX_ "Cloning substitution context is unimplemented");
9348 ncx->blk_oldsp = cx->blk_oldsp;
9349 ncx->blk_oldcop = cx->blk_oldcop;
9350 ncx->blk_oldretsp = cx->blk_oldretsp;
9351 ncx->blk_oldmarksp = cx->blk_oldmarksp;
9352 ncx->blk_oldscopesp = cx->blk_oldscopesp;
9353 ncx->blk_oldpm = cx->blk_oldpm;
9354 ncx->blk_gimme = cx->blk_gimme;
9355 switch (CxTYPE(cx)) {
9357 ncx->blk_sub.cv = (cx->blk_sub.olddepth == 0
9358 ? cv_dup_inc(cx->blk_sub.cv, param)
9359 : cv_dup(cx->blk_sub.cv,param));
9360 ncx->blk_sub.argarray = (cx->blk_sub.hasargs
9361 ? av_dup_inc(cx->blk_sub.argarray, param)
9363 ncx->blk_sub.savearray = av_dup_inc(cx->blk_sub.savearray, param);
9364 ncx->blk_sub.olddepth = cx->blk_sub.olddepth;
9365 ncx->blk_sub.hasargs = cx->blk_sub.hasargs;
9366 ncx->blk_sub.lval = cx->blk_sub.lval;
9369 ncx->blk_eval.old_in_eval = cx->blk_eval.old_in_eval;
9370 ncx->blk_eval.old_op_type = cx->blk_eval.old_op_type;
9371 ncx->blk_eval.old_namesv = sv_dup_inc(cx->blk_eval.old_namesv, param);
9372 ncx->blk_eval.old_eval_root = cx->blk_eval.old_eval_root;
9373 ncx->blk_eval.cur_text = sv_dup(cx->blk_eval.cur_text, param);
9376 ncx->blk_loop.label = cx->blk_loop.label;
9377 ncx->blk_loop.resetsp = cx->blk_loop.resetsp;
9378 ncx->blk_loop.redo_op = cx->blk_loop.redo_op;
9379 ncx->blk_loop.next_op = cx->blk_loop.next_op;
9380 ncx->blk_loop.last_op = cx->blk_loop.last_op;
9381 ncx->blk_loop.iterdata = (CxPADLOOP(cx)
9382 ? cx->blk_loop.iterdata
9383 : gv_dup((GV*)cx->blk_loop.iterdata, param));
9384 ncx->blk_loop.oldcurpad
9385 = (SV**)ptr_table_fetch(PL_ptr_table,
9386 cx->blk_loop.oldcurpad);
9387 ncx->blk_loop.itersave = sv_dup_inc(cx->blk_loop.itersave, param);
9388 ncx->blk_loop.iterlval = sv_dup_inc(cx->blk_loop.iterlval, param);
9389 ncx->blk_loop.iterary = av_dup_inc(cx->blk_loop.iterary, param);
9390 ncx->blk_loop.iterix = cx->blk_loop.iterix;
9391 ncx->blk_loop.itermax = cx->blk_loop.itermax;
9394 ncx->blk_sub.cv = cv_dup(cx->blk_sub.cv, param);
9395 ncx->blk_sub.gv = gv_dup(cx->blk_sub.gv, param);
9396 ncx->blk_sub.dfoutgv = gv_dup_inc(cx->blk_sub.dfoutgv, param);
9397 ncx->blk_sub.hasargs = cx->blk_sub.hasargs;
9409 /* duplicate a stack info structure */
9412 Perl_si_dup(pTHX_ PERL_SI *si, CLONE_PARAMS* param)
9417 return (PERL_SI*)NULL;
9419 /* look for it in the table first */
9420 nsi = (PERL_SI*)ptr_table_fetch(PL_ptr_table, si);
9424 /* create anew and remember what it is */
9425 Newz(56, nsi, 1, PERL_SI);
9426 ptr_table_store(PL_ptr_table, si, nsi);
9428 nsi->si_stack = av_dup_inc(si->si_stack, param);
9429 nsi->si_cxix = si->si_cxix;
9430 nsi->si_cxmax = si->si_cxmax;
9431 nsi->si_cxstack = cx_dup(si->si_cxstack, si->si_cxix, si->si_cxmax, param);
9432 nsi->si_type = si->si_type;
9433 nsi->si_prev = si_dup(si->si_prev, param);
9434 nsi->si_next = si_dup(si->si_next, param);
9435 nsi->si_markoff = si->si_markoff;
9440 #define POPINT(ss,ix) ((ss)[--(ix)].any_i32)
9441 #define TOPINT(ss,ix) ((ss)[ix].any_i32)
9442 #define POPLONG(ss,ix) ((ss)[--(ix)].any_long)
9443 #define TOPLONG(ss,ix) ((ss)[ix].any_long)
9444 #define POPIV(ss,ix) ((ss)[--(ix)].any_iv)
9445 #define TOPIV(ss,ix) ((ss)[ix].any_iv)
9446 #define POPPTR(ss,ix) ((ss)[--(ix)].any_ptr)
9447 #define TOPPTR(ss,ix) ((ss)[ix].any_ptr)
9448 #define POPDPTR(ss,ix) ((ss)[--(ix)].any_dptr)
9449 #define TOPDPTR(ss,ix) ((ss)[ix].any_dptr)
9450 #define POPDXPTR(ss,ix) ((ss)[--(ix)].any_dxptr)
9451 #define TOPDXPTR(ss,ix) ((ss)[ix].any_dxptr)
9454 #define pv_dup_inc(p) SAVEPV(p)
9455 #define pv_dup(p) SAVEPV(p)
9456 #define svp_dup_inc(p,pp) any_dup(p,pp)
9458 /* map any object to the new equivent - either something in the
9459 * ptr table, or something in the interpreter structure
9463 Perl_any_dup(pTHX_ void *v, PerlInterpreter *proto_perl)
9470 /* look for it in the table first */
9471 ret = ptr_table_fetch(PL_ptr_table, v);
9475 /* see if it is part of the interpreter structure */
9476 if (v >= (void*)proto_perl && v < (void*)(proto_perl+1))
9477 ret = (void*)(((char*)aTHX) + (((char*)v) - (char*)proto_perl));
9485 /* duplicate the save stack */
9488 Perl_ss_dup(pTHX_ PerlInterpreter *proto_perl, CLONE_PARAMS* param)
9490 ANY *ss = proto_perl->Tsavestack;
9491 I32 ix = proto_perl->Tsavestack_ix;
9492 I32 max = proto_perl->Tsavestack_max;
9505 void (*dptr) (void*);
9506 void (*dxptr) (pTHX_ void*);
9509 Newz(54, nss, max, ANY);
9515 case SAVEt_ITEM: /* normal string */
9516 sv = (SV*)POPPTR(ss,ix);
9517 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9518 sv = (SV*)POPPTR(ss,ix);
9519 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9521 case SAVEt_SV: /* scalar reference */
9522 sv = (SV*)POPPTR(ss,ix);
9523 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9524 gv = (GV*)POPPTR(ss,ix);
9525 TOPPTR(nss,ix) = gv_dup_inc(gv, param);
9527 case SAVEt_GENERIC_PVREF: /* generic char* */
9528 c = (char*)POPPTR(ss,ix);
9529 TOPPTR(nss,ix) = pv_dup(c);
9530 ptr = POPPTR(ss,ix);
9531 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9533 case SAVEt_SHARED_PVREF: /* char* in shared space */
9534 c = (char*)POPPTR(ss,ix);
9535 TOPPTR(nss,ix) = savesharedpv(c);
9536 ptr = POPPTR(ss,ix);
9537 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9539 case SAVEt_GENERIC_SVREF: /* generic sv */
9540 case SAVEt_SVREF: /* scalar reference */
9541 sv = (SV*)POPPTR(ss,ix);
9542 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9543 ptr = POPPTR(ss,ix);
9544 TOPPTR(nss,ix) = svp_dup_inc((SV**)ptr, proto_perl);/* XXXXX */
9546 case SAVEt_AV: /* array reference */
9547 av = (AV*)POPPTR(ss,ix);
9548 TOPPTR(nss,ix) = av_dup_inc(av, param);
9549 gv = (GV*)POPPTR(ss,ix);
9550 TOPPTR(nss,ix) = gv_dup(gv, param);
9552 case SAVEt_HV: /* hash reference */
9553 hv = (HV*)POPPTR(ss,ix);
9554 TOPPTR(nss,ix) = hv_dup_inc(hv, param);
9555 gv = (GV*)POPPTR(ss,ix);
9556 TOPPTR(nss,ix) = gv_dup(gv, param);
9558 case SAVEt_INT: /* int reference */
9559 ptr = POPPTR(ss,ix);
9560 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9561 intval = (int)POPINT(ss,ix);
9562 TOPINT(nss,ix) = intval;
9564 case SAVEt_LONG: /* long reference */
9565 ptr = POPPTR(ss,ix);
9566 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9567 longval = (long)POPLONG(ss,ix);
9568 TOPLONG(nss,ix) = longval;
9570 case SAVEt_I32: /* I32 reference */
9571 case SAVEt_I16: /* I16 reference */
9572 case SAVEt_I8: /* I8 reference */
9573 ptr = POPPTR(ss,ix);
9574 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9578 case SAVEt_IV: /* IV reference */
9579 ptr = POPPTR(ss,ix);
9580 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9584 case SAVEt_SPTR: /* SV* reference */
9585 ptr = POPPTR(ss,ix);
9586 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9587 sv = (SV*)POPPTR(ss,ix);
9588 TOPPTR(nss,ix) = sv_dup(sv, param);
9590 case SAVEt_VPTR: /* random* reference */
9591 ptr = POPPTR(ss,ix);
9592 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9593 ptr = POPPTR(ss,ix);
9594 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9596 case SAVEt_PPTR: /* char* reference */
9597 ptr = POPPTR(ss,ix);
9598 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9599 c = (char*)POPPTR(ss,ix);
9600 TOPPTR(nss,ix) = pv_dup(c);
9602 case SAVEt_HPTR: /* HV* reference */
9603 ptr = POPPTR(ss,ix);
9604 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9605 hv = (HV*)POPPTR(ss,ix);
9606 TOPPTR(nss,ix) = hv_dup(hv, param);
9608 case SAVEt_APTR: /* AV* reference */
9609 ptr = POPPTR(ss,ix);
9610 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9611 av = (AV*)POPPTR(ss,ix);
9612 TOPPTR(nss,ix) = av_dup(av, param);
9615 gv = (GV*)POPPTR(ss,ix);
9616 TOPPTR(nss,ix) = gv_dup(gv, param);
9618 case SAVEt_GP: /* scalar reference */
9619 gp = (GP*)POPPTR(ss,ix);
9620 TOPPTR(nss,ix) = gp = gp_dup(gp, param);
9621 (void)GpREFCNT_inc(gp);
9622 gv = (GV*)POPPTR(ss,ix);
9623 TOPPTR(nss,ix) = gv_dup_inc(gv, param);
9624 c = (char*)POPPTR(ss,ix);
9625 TOPPTR(nss,ix) = pv_dup(c);
9632 case SAVEt_MORTALIZESV:
9633 sv = (SV*)POPPTR(ss,ix);
9634 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9637 ptr = POPPTR(ss,ix);
9638 if (ptr && (((OP*)ptr)->op_private & OPpREFCOUNTED)) {
9639 /* these are assumed to be refcounted properly */
9640 switch (((OP*)ptr)->op_type) {
9647 TOPPTR(nss,ix) = ptr;
9652 TOPPTR(nss,ix) = Nullop;
9657 TOPPTR(nss,ix) = Nullop;
9660 c = (char*)POPPTR(ss,ix);
9661 TOPPTR(nss,ix) = pv_dup_inc(c);
9664 longval = POPLONG(ss,ix);
9665 TOPLONG(nss,ix) = longval;
9668 hv = (HV*)POPPTR(ss,ix);
9669 TOPPTR(nss,ix) = hv_dup_inc(hv, param);
9670 c = (char*)POPPTR(ss,ix);
9671 TOPPTR(nss,ix) = pv_dup_inc(c);
9675 case SAVEt_DESTRUCTOR:
9676 ptr = POPPTR(ss,ix);
9677 TOPPTR(nss,ix) = any_dup(ptr, proto_perl); /* XXX quite arbitrary */
9678 dptr = POPDPTR(ss,ix);
9679 TOPDPTR(nss,ix) = (void (*)(void*))any_dup((void *)dptr, proto_perl);
9681 case SAVEt_DESTRUCTOR_X:
9682 ptr = POPPTR(ss,ix);
9683 TOPPTR(nss,ix) = any_dup(ptr, proto_perl); /* XXX quite arbitrary */
9684 dxptr = POPDXPTR(ss,ix);
9685 TOPDXPTR(nss,ix) = (void (*)(pTHX_ void*))any_dup((void *)dxptr, proto_perl);
9687 case SAVEt_REGCONTEXT:
9693 case SAVEt_STACK_POS: /* Position on Perl stack */
9697 case SAVEt_AELEM: /* array element */
9698 sv = (SV*)POPPTR(ss,ix);
9699 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9702 av = (AV*)POPPTR(ss,ix);
9703 TOPPTR(nss,ix) = av_dup_inc(av, param);
9705 case SAVEt_HELEM: /* hash element */
9706 sv = (SV*)POPPTR(ss,ix);
9707 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9708 sv = (SV*)POPPTR(ss,ix);
9709 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9710 hv = (HV*)POPPTR(ss,ix);
9711 TOPPTR(nss,ix) = hv_dup_inc(hv, param);
9714 ptr = POPPTR(ss,ix);
9715 TOPPTR(nss,ix) = ptr;
9722 av = (AV*)POPPTR(ss,ix);
9723 TOPPTR(nss,ix) = av_dup(av, param);
9726 longval = (long)POPLONG(ss,ix);
9727 TOPLONG(nss,ix) = longval;
9728 ptr = POPPTR(ss,ix);
9729 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9730 sv = (SV*)POPPTR(ss,ix);
9731 TOPPTR(nss,ix) = sv_dup(sv, param);
9734 Perl_croak(aTHX_ "panic: ss_dup inconsistency");
9742 =for apidoc perl_clone
9744 Create and return a new interpreter by cloning the current one.
9749 /* XXX the above needs expanding by someone who actually understands it ! */
9750 EXTERN_C PerlInterpreter *
9751 perl_clone_host(PerlInterpreter* proto_perl, UV flags);
9754 perl_clone(PerlInterpreter *proto_perl, UV flags)
9756 #ifdef PERL_IMPLICIT_SYS
9758 /* perlhost.h so we need to call into it
9759 to clone the host, CPerlHost should have a c interface, sky */
9761 if (flags & CLONEf_CLONE_HOST) {
9762 return perl_clone_host(proto_perl,flags);
9764 return perl_clone_using(proto_perl, flags,
9766 proto_perl->IMemShared,
9767 proto_perl->IMemParse,
9777 perl_clone_using(PerlInterpreter *proto_perl, UV flags,
9778 struct IPerlMem* ipM, struct IPerlMem* ipMS,
9779 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
9780 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
9781 struct IPerlDir* ipD, struct IPerlSock* ipS,
9782 struct IPerlProc* ipP)
9784 /* XXX many of the string copies here can be optimized if they're
9785 * constants; they need to be allocated as common memory and just
9786 * their pointers copied. */
9789 CLONE_PARAMS clone_params;
9790 CLONE_PARAMS* param = &clone_params;
9792 PerlInterpreter *my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
9793 PERL_SET_THX(my_perl);
9796 Poison(my_perl, 1, PerlInterpreter);
9802 Zero(&PL_debug_pad, 1, struct perl_debug_pad);
9803 # else /* !DEBUGGING */
9804 Zero(my_perl, 1, PerlInterpreter);
9805 # endif /* DEBUGGING */
9809 PL_MemShared = ipMS;
9817 #else /* !PERL_IMPLICIT_SYS */
9819 CLONE_PARAMS clone_params;
9820 CLONE_PARAMS* param = &clone_params;
9821 PerlInterpreter *my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
9822 PERL_SET_THX(my_perl);
9827 Poison(my_perl, 1, PerlInterpreter);
9833 Zero(&PL_debug_pad, 1, struct perl_debug_pad);
9834 # else /* !DEBUGGING */
9835 Zero(my_perl, 1, PerlInterpreter);
9836 # endif /* DEBUGGING */
9837 #endif /* PERL_IMPLICIT_SYS */
9838 param->flags = flags;
9839 param->proto_perl = proto_perl;
9842 PL_xiv_arenaroot = NULL;
9844 PL_xnv_arenaroot = NULL;
9846 PL_xrv_arenaroot = NULL;
9848 PL_xpv_arenaroot = NULL;
9850 PL_xpviv_arenaroot = NULL;
9851 PL_xpviv_root = NULL;
9852 PL_xpvnv_arenaroot = NULL;
9853 PL_xpvnv_root = NULL;
9854 PL_xpvcv_arenaroot = NULL;
9855 PL_xpvcv_root = NULL;
9856 PL_xpvav_arenaroot = NULL;
9857 PL_xpvav_root = NULL;
9858 PL_xpvhv_arenaroot = NULL;
9859 PL_xpvhv_root = NULL;
9860 PL_xpvmg_arenaroot = NULL;
9861 PL_xpvmg_root = NULL;
9862 PL_xpvlv_arenaroot = NULL;
9863 PL_xpvlv_root = NULL;
9864 PL_xpvbm_arenaroot = NULL;
9865 PL_xpvbm_root = NULL;
9866 PL_he_arenaroot = NULL;
9868 PL_nice_chunk = NULL;
9869 PL_nice_chunk_size = 0;
9872 PL_sv_root = Nullsv;
9873 PL_sv_arenaroot = Nullsv;
9875 PL_debug = proto_perl->Idebug;
9877 #ifdef USE_REENTRANT_API
9878 Perl_reentrant_init(aTHX);
9881 /* create SV map for pointer relocation */
9882 PL_ptr_table = ptr_table_new();
9884 /* initialize these special pointers as early as possible */
9885 SvANY(&PL_sv_undef) = NULL;
9886 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
9887 SvFLAGS(&PL_sv_undef) = SVf_READONLY|SVt_NULL;
9888 ptr_table_store(PL_ptr_table, &proto_perl->Isv_undef, &PL_sv_undef);
9890 SvANY(&PL_sv_no) = new_XPVNV();
9891 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
9892 SvFLAGS(&PL_sv_no) = SVp_NOK|SVf_NOK|SVp_POK|SVf_POK|SVf_READONLY|SVt_PVNV;
9893 SvPVX(&PL_sv_no) = SAVEPVN(PL_No, 0);
9894 SvCUR(&PL_sv_no) = 0;
9895 SvLEN(&PL_sv_no) = 1;
9896 SvNVX(&PL_sv_no) = 0;
9897 ptr_table_store(PL_ptr_table, &proto_perl->Isv_no, &PL_sv_no);
9899 SvANY(&PL_sv_yes) = new_XPVNV();
9900 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
9901 SvFLAGS(&PL_sv_yes) = SVp_NOK|SVf_NOK|SVp_POK|SVf_POK|SVf_READONLY|SVt_PVNV;
9902 SvPVX(&PL_sv_yes) = SAVEPVN(PL_Yes, 1);
9903 SvCUR(&PL_sv_yes) = 1;
9904 SvLEN(&PL_sv_yes) = 2;
9905 SvNVX(&PL_sv_yes) = 1;
9906 ptr_table_store(PL_ptr_table, &proto_perl->Isv_yes, &PL_sv_yes);
9908 /* create (a non-shared!) shared string table */
9909 PL_strtab = newHV();
9910 HvSHAREKEYS_off(PL_strtab);
9911 hv_ksplit(PL_strtab, 512);
9912 ptr_table_store(PL_ptr_table, proto_perl->Istrtab, PL_strtab);
9914 PL_compiling = proto_perl->Icompiling;
9916 /* These two PVs will be free'd special way so must set them same way op.c does */
9917 PL_compiling.cop_stashpv = savesharedpv(PL_compiling.cop_stashpv);
9918 ptr_table_store(PL_ptr_table, proto_perl->Icompiling.cop_stashpv, PL_compiling.cop_stashpv);
9920 PL_compiling.cop_file = savesharedpv(PL_compiling.cop_file);
9921 ptr_table_store(PL_ptr_table, proto_perl->Icompiling.cop_file, PL_compiling.cop_file);
9923 ptr_table_store(PL_ptr_table, &proto_perl->Icompiling, &PL_compiling);
9924 if (!specialWARN(PL_compiling.cop_warnings))
9925 PL_compiling.cop_warnings = sv_dup_inc(PL_compiling.cop_warnings, param);
9926 if (!specialCopIO(PL_compiling.cop_io))
9927 PL_compiling.cop_io = sv_dup_inc(PL_compiling.cop_io, param);
9928 PL_curcop = (COP*)any_dup(proto_perl->Tcurcop, proto_perl);
9930 /* pseudo environmental stuff */
9931 PL_origargc = proto_perl->Iorigargc;
9933 New(0, PL_origargv, i+1, char*);
9934 PL_origargv[i] = '\0';
9936 PL_origargv[i] = SAVEPV(proto_perl->Iorigargv[i]);
9939 param->stashes = newAV(); /* Setup array of objects to call clone on */
9941 #ifdef PERLIO_LAYERS
9942 /* Clone PerlIO tables as soon as we can handle general xx_dup() */
9943 PerlIO_clone(aTHX_ proto_perl, param);
9946 PL_envgv = gv_dup(proto_perl->Ienvgv, param);
9947 PL_incgv = gv_dup(proto_perl->Iincgv, param);
9948 PL_hintgv = gv_dup(proto_perl->Ihintgv, param);
9949 PL_origfilename = SAVEPV(proto_perl->Iorigfilename);
9950 PL_diehook = sv_dup_inc(proto_perl->Idiehook, param);
9951 PL_warnhook = sv_dup_inc(proto_perl->Iwarnhook, param);
9954 PL_minus_c = proto_perl->Iminus_c;
9955 PL_patchlevel = sv_dup_inc(proto_perl->Ipatchlevel, param);
9956 PL_localpatches = proto_perl->Ilocalpatches;
9957 PL_splitstr = proto_perl->Isplitstr;
9958 PL_preprocess = proto_perl->Ipreprocess;
9959 PL_minus_n = proto_perl->Iminus_n;
9960 PL_minus_p = proto_perl->Iminus_p;
9961 PL_minus_l = proto_perl->Iminus_l;
9962 PL_minus_a = proto_perl->Iminus_a;
9963 PL_minus_F = proto_perl->Iminus_F;
9964 PL_doswitches = proto_perl->Idoswitches;
9965 PL_dowarn = proto_perl->Idowarn;
9966 PL_doextract = proto_perl->Idoextract;
9967 PL_sawampersand = proto_perl->Isawampersand;
9968 PL_unsafe = proto_perl->Iunsafe;
9969 PL_inplace = SAVEPV(proto_perl->Iinplace);
9970 PL_e_script = sv_dup_inc(proto_perl->Ie_script, param);
9971 PL_perldb = proto_perl->Iperldb;
9972 PL_perl_destruct_level = proto_perl->Iperl_destruct_level;
9973 PL_exit_flags = proto_perl->Iexit_flags;
9975 /* magical thingies */
9976 /* XXX time(&PL_basetime) when asked for? */
9977 PL_basetime = proto_perl->Ibasetime;
9978 PL_formfeed = sv_dup(proto_perl->Iformfeed, param);
9980 PL_maxsysfd = proto_perl->Imaxsysfd;
9981 PL_multiline = proto_perl->Imultiline;
9982 PL_statusvalue = proto_perl->Istatusvalue;
9984 PL_statusvalue_vms = proto_perl->Istatusvalue_vms;
9986 PL_encoding = sv_dup(proto_perl->Iencoding, param);
9988 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
9989 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
9990 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
9992 /* Clone the regex array */
9993 PL_regex_padav = newAV();
9995 I32 len = av_len((AV*)proto_perl->Iregex_padav);
9996 SV** regexen = AvARRAY((AV*)proto_perl->Iregex_padav);
9997 av_push(PL_regex_padav,
9998 sv_dup_inc(regexen[0],param));
9999 for(i = 1; i <= len; i++) {
10000 if(SvREPADTMP(regexen[i])) {
10001 av_push(PL_regex_padav, sv_dup_inc(regexen[i], param));
10003 av_push(PL_regex_padav,
10005 newSViv(PTR2IV(re_dup(INT2PTR(REGEXP *,
10006 SvIVX(regexen[i])), param)))
10011 PL_regex_pad = AvARRAY(PL_regex_padav);
10013 /* shortcuts to various I/O objects */
10014 PL_stdingv = gv_dup(proto_perl->Istdingv, param);
10015 PL_stderrgv = gv_dup(proto_perl->Istderrgv, param);
10016 PL_defgv = gv_dup(proto_perl->Idefgv, param);
10017 PL_argvgv = gv_dup(proto_perl->Iargvgv, param);
10018 PL_argvoutgv = gv_dup(proto_perl->Iargvoutgv, param);
10019 PL_argvout_stack = av_dup_inc(proto_perl->Iargvout_stack, param);
10021 /* shortcuts to regexp stuff */
10022 PL_replgv = gv_dup(proto_perl->Ireplgv, param);
10024 /* shortcuts to misc objects */
10025 PL_errgv = gv_dup(proto_perl->Ierrgv, param);
10027 /* shortcuts to debugging objects */
10028 PL_DBgv = gv_dup(proto_perl->IDBgv, param);
10029 PL_DBline = gv_dup(proto_perl->IDBline, param);
10030 PL_DBsub = gv_dup(proto_perl->IDBsub, param);
10031 PL_DBsingle = sv_dup(proto_perl->IDBsingle, param);
10032 PL_DBtrace = sv_dup(proto_perl->IDBtrace, param);
10033 PL_DBsignal = sv_dup(proto_perl->IDBsignal, param);
10034 PL_lineary = av_dup(proto_perl->Ilineary, param);
10035 PL_dbargs = av_dup(proto_perl->Idbargs, param);
10037 /* symbol tables */
10038 PL_defstash = hv_dup_inc(proto_perl->Tdefstash, param);
10039 PL_curstash = hv_dup(proto_perl->Tcurstash, param);
10040 PL_nullstash = hv_dup(proto_perl->Inullstash, param);
10041 PL_debstash = hv_dup(proto_perl->Idebstash, param);
10042 PL_globalstash = hv_dup(proto_perl->Iglobalstash, param);
10043 PL_curstname = sv_dup_inc(proto_perl->Icurstname, param);
10045 PL_beginav = av_dup_inc(proto_perl->Ibeginav, param);
10046 PL_beginav_save = av_dup_inc(proto_perl->Ibeginav_save, param);
10047 PL_endav = av_dup_inc(proto_perl->Iendav, param);
10048 PL_checkav = av_dup_inc(proto_perl->Icheckav, param);
10049 PL_initav = av_dup_inc(proto_perl->Iinitav, param);
10051 PL_sub_generation = proto_perl->Isub_generation;
10053 /* funky return mechanisms */
10054 PL_forkprocess = proto_perl->Iforkprocess;
10056 /* subprocess state */
10057 PL_fdpid = av_dup_inc(proto_perl->Ifdpid, param);
10059 /* internal state */
10060 PL_tainting = proto_perl->Itainting;
10061 PL_maxo = proto_perl->Imaxo;
10062 if (proto_perl->Iop_mask)
10063 PL_op_mask = SAVEPVN(proto_perl->Iop_mask, PL_maxo);
10065 PL_op_mask = Nullch;
10067 /* current interpreter roots */
10068 PL_main_cv = cv_dup_inc(proto_perl->Imain_cv, param);
10069 PL_main_root = OpREFCNT_inc(proto_perl->Imain_root);
10070 PL_main_start = proto_perl->Imain_start;
10071 PL_eval_root = proto_perl->Ieval_root;
10072 PL_eval_start = proto_perl->Ieval_start;
10074 /* runtime control stuff */
10075 PL_curcopdb = (COP*)any_dup(proto_perl->Icurcopdb, proto_perl);
10076 PL_copline = proto_perl->Icopline;
10078 PL_filemode = proto_perl->Ifilemode;
10079 PL_lastfd = proto_perl->Ilastfd;
10080 PL_oldname = proto_perl->Ioldname; /* XXX not quite right */
10083 PL_gensym = proto_perl->Igensym;
10084 PL_preambled = proto_perl->Ipreambled;
10085 PL_preambleav = av_dup_inc(proto_perl->Ipreambleav, param);
10086 PL_laststatval = proto_perl->Ilaststatval;
10087 PL_laststype = proto_perl->Ilaststype;
10088 PL_mess_sv = Nullsv;
10090 PL_ors_sv = sv_dup_inc(proto_perl->Iors_sv, param);
10091 PL_ofmt = SAVEPV(proto_perl->Iofmt);
10093 /* interpreter atexit processing */
10094 PL_exitlistlen = proto_perl->Iexitlistlen;
10095 if (PL_exitlistlen) {
10096 New(0, PL_exitlist, PL_exitlistlen, PerlExitListEntry);
10097 Copy(proto_perl->Iexitlist, PL_exitlist, PL_exitlistlen, PerlExitListEntry);
10100 PL_exitlist = (PerlExitListEntry*)NULL;
10101 PL_modglobal = hv_dup_inc(proto_perl->Imodglobal, param);
10102 PL_custom_op_names = hv_dup_inc(proto_perl->Icustom_op_names,param);
10103 PL_custom_op_descs = hv_dup_inc(proto_perl->Icustom_op_descs,param);
10105 PL_profiledata = NULL;
10106 PL_rsfp = fp_dup(proto_perl->Irsfp, '<', param);
10107 /* PL_rsfp_filters entries have fake IoDIRP() */
10108 PL_rsfp_filters = av_dup_inc(proto_perl->Irsfp_filters, param);
10110 PL_compcv = cv_dup(proto_perl->Icompcv, param);
10111 PL_comppad = av_dup(proto_perl->Icomppad, param);
10112 PL_comppad_name = av_dup(proto_perl->Icomppad_name, param);
10113 PL_comppad_name_fill = proto_perl->Icomppad_name_fill;
10114 PL_comppad_name_floor = proto_perl->Icomppad_name_floor;
10115 PL_curpad = (SV**)ptr_table_fetch(PL_ptr_table,
10116 proto_perl->Tcurpad);
10118 #ifdef HAVE_INTERP_INTERN
10119 sys_intern_dup(&proto_perl->Isys_intern, &PL_sys_intern);
10122 /* more statics moved here */
10123 PL_generation = proto_perl->Igeneration;
10124 PL_DBcv = cv_dup(proto_perl->IDBcv, param);
10126 PL_in_clean_objs = proto_perl->Iin_clean_objs;
10127 PL_in_clean_all = proto_perl->Iin_clean_all;
10129 PL_uid = proto_perl->Iuid;
10130 PL_euid = proto_perl->Ieuid;
10131 PL_gid = proto_perl->Igid;
10132 PL_egid = proto_perl->Iegid;
10133 PL_nomemok = proto_perl->Inomemok;
10134 PL_an = proto_perl->Ian;
10135 PL_cop_seqmax = proto_perl->Icop_seqmax;
10136 PL_op_seqmax = proto_perl->Iop_seqmax;
10137 PL_evalseq = proto_perl->Ievalseq;
10138 PL_origenviron = proto_perl->Iorigenviron; /* XXX not quite right */
10139 PL_origalen = proto_perl->Iorigalen;
10140 PL_pidstatus = newHV(); /* XXX flag for cloning? */
10141 PL_osname = SAVEPV(proto_perl->Iosname);
10142 PL_sh_path = proto_perl->Ish_path; /* XXX never deallocated */
10143 PL_sighandlerp = proto_perl->Isighandlerp;
10146 PL_runops = proto_perl->Irunops;
10148 Copy(proto_perl->Itokenbuf, PL_tokenbuf, 256, char);
10151 PL_cshlen = proto_perl->Icshlen;
10152 PL_cshname = proto_perl->Icshname; /* XXX never deallocated */
10155 PL_lex_state = proto_perl->Ilex_state;
10156 PL_lex_defer = proto_perl->Ilex_defer;
10157 PL_lex_expect = proto_perl->Ilex_expect;
10158 PL_lex_formbrack = proto_perl->Ilex_formbrack;
10159 PL_lex_dojoin = proto_perl->Ilex_dojoin;
10160 PL_lex_starts = proto_perl->Ilex_starts;
10161 PL_lex_stuff = sv_dup_inc(proto_perl->Ilex_stuff, param);
10162 PL_lex_repl = sv_dup_inc(proto_perl->Ilex_repl, param);
10163 PL_lex_op = proto_perl->Ilex_op;
10164 PL_lex_inpat = proto_perl->Ilex_inpat;
10165 PL_lex_inwhat = proto_perl->Ilex_inwhat;
10166 PL_lex_brackets = proto_perl->Ilex_brackets;
10167 i = (PL_lex_brackets < 120 ? 120 : PL_lex_brackets);
10168 PL_lex_brackstack = SAVEPVN(proto_perl->Ilex_brackstack,i);
10169 PL_lex_casemods = proto_perl->Ilex_casemods;
10170 i = (PL_lex_casemods < 12 ? 12 : PL_lex_casemods);
10171 PL_lex_casestack = SAVEPVN(proto_perl->Ilex_casestack,i);
10173 Copy(proto_perl->Inextval, PL_nextval, 5, YYSTYPE);
10174 Copy(proto_perl->Inexttype, PL_nexttype, 5, I32);
10175 PL_nexttoke = proto_perl->Inexttoke;
10177 /* XXX This is probably masking the deeper issue of why
10178 * SvANY(proto_perl->Ilinestr) can be NULL at this point. For test case:
10179 * http://archive.develooper.com/perl5-porters%40perl.org/msg83298.html
10180 * (A little debugging with a watchpoint on it may help.)
10182 if (SvANY(proto_perl->Ilinestr)) {
10183 PL_linestr = sv_dup_inc(proto_perl->Ilinestr, param);
10184 i = proto_perl->Ibufptr - SvPVX(proto_perl->Ilinestr);
10185 PL_bufptr = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10186 i = proto_perl->Ioldbufptr - SvPVX(proto_perl->Ilinestr);
10187 PL_oldbufptr = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10188 i = proto_perl->Ioldoldbufptr - SvPVX(proto_perl->Ilinestr);
10189 PL_oldoldbufptr = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10190 i = proto_perl->Ilinestart - SvPVX(proto_perl->Ilinestr);
10191 PL_linestart = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10194 PL_linestr = NEWSV(65,79);
10195 sv_upgrade(PL_linestr,SVt_PVIV);
10196 sv_setpvn(PL_linestr,"",0);
10197 PL_bufptr = PL_oldbufptr = PL_oldoldbufptr = PL_linestart = SvPVX(PL_linestr);
10199 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
10200 PL_pending_ident = proto_perl->Ipending_ident;
10201 PL_sublex_info = proto_perl->Isublex_info; /* XXX not quite right */
10203 PL_expect = proto_perl->Iexpect;
10205 PL_multi_start = proto_perl->Imulti_start;
10206 PL_multi_end = proto_perl->Imulti_end;
10207 PL_multi_open = proto_perl->Imulti_open;
10208 PL_multi_close = proto_perl->Imulti_close;
10210 PL_error_count = proto_perl->Ierror_count;
10211 PL_subline = proto_perl->Isubline;
10212 PL_subname = sv_dup_inc(proto_perl->Isubname, param);
10214 PL_min_intro_pending = proto_perl->Imin_intro_pending;
10215 PL_max_intro_pending = proto_perl->Imax_intro_pending;
10216 PL_padix = proto_perl->Ipadix;
10217 PL_padix_floor = proto_perl->Ipadix_floor;
10218 PL_pad_reset_pending = proto_perl->Ipad_reset_pending;
10220 /* XXX See comment on SvANY(proto_perl->Ilinestr) above */
10221 if (SvANY(proto_perl->Ilinestr)) {
10222 i = proto_perl->Ilast_uni - SvPVX(proto_perl->Ilinestr);
10223 PL_last_uni = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10224 i = proto_perl->Ilast_lop - SvPVX(proto_perl->Ilinestr);
10225 PL_last_lop = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10226 PL_last_lop_op = proto_perl->Ilast_lop_op;
10229 PL_last_uni = SvPVX(PL_linestr);
10230 PL_last_lop = SvPVX(PL_linestr);
10231 PL_last_lop_op = 0;
10233 PL_in_my = proto_perl->Iin_my;
10234 PL_in_my_stash = hv_dup(proto_perl->Iin_my_stash, param);
10236 PL_cryptseen = proto_perl->Icryptseen;
10239 PL_hints = proto_perl->Ihints;
10241 PL_amagic_generation = proto_perl->Iamagic_generation;
10243 #ifdef USE_LOCALE_COLLATE
10244 PL_collation_ix = proto_perl->Icollation_ix;
10245 PL_collation_name = SAVEPV(proto_perl->Icollation_name);
10246 PL_collation_standard = proto_perl->Icollation_standard;
10247 PL_collxfrm_base = proto_perl->Icollxfrm_base;
10248 PL_collxfrm_mult = proto_perl->Icollxfrm_mult;
10249 #endif /* USE_LOCALE_COLLATE */
10251 #ifdef USE_LOCALE_NUMERIC
10252 PL_numeric_name = SAVEPV(proto_perl->Inumeric_name);
10253 PL_numeric_standard = proto_perl->Inumeric_standard;
10254 PL_numeric_local = proto_perl->Inumeric_local;
10255 PL_numeric_radix_sv = sv_dup_inc(proto_perl->Inumeric_radix_sv, param);
10256 #endif /* !USE_LOCALE_NUMERIC */
10258 /* utf8 character classes */
10259 PL_utf8_alnum = sv_dup_inc(proto_perl->Iutf8_alnum, param);
10260 PL_utf8_alnumc = sv_dup_inc(proto_perl->Iutf8_alnumc, param);
10261 PL_utf8_ascii = sv_dup_inc(proto_perl->Iutf8_ascii, param);
10262 PL_utf8_alpha = sv_dup_inc(proto_perl->Iutf8_alpha, param);
10263 PL_utf8_space = sv_dup_inc(proto_perl->Iutf8_space, param);
10264 PL_utf8_cntrl = sv_dup_inc(proto_perl->Iutf8_cntrl, param);
10265 PL_utf8_graph = sv_dup_inc(proto_perl->Iutf8_graph, param);
10266 PL_utf8_digit = sv_dup_inc(proto_perl->Iutf8_digit, param);
10267 PL_utf8_upper = sv_dup_inc(proto_perl->Iutf8_upper, param);
10268 PL_utf8_lower = sv_dup_inc(proto_perl->Iutf8_lower, param);
10269 PL_utf8_print = sv_dup_inc(proto_perl->Iutf8_print, param);
10270 PL_utf8_punct = sv_dup_inc(proto_perl->Iutf8_punct, param);
10271 PL_utf8_xdigit = sv_dup_inc(proto_perl->Iutf8_xdigit, param);
10272 PL_utf8_mark = sv_dup_inc(proto_perl->Iutf8_mark, param);
10273 PL_utf8_toupper = sv_dup_inc(proto_perl->Iutf8_toupper, param);
10274 PL_utf8_totitle = sv_dup_inc(proto_perl->Iutf8_totitle, param);
10275 PL_utf8_tolower = sv_dup_inc(proto_perl->Iutf8_tolower, param);
10276 PL_utf8_tofold = sv_dup_inc(proto_perl->Iutf8_tofold, param);
10277 PL_utf8_idstart = sv_dup_inc(proto_perl->Iutf8_idstart, param);
10278 PL_utf8_idcont = sv_dup_inc(proto_perl->Iutf8_idcont, param);
10281 PL_last_swash_hv = Nullhv; /* reinits on demand */
10282 PL_last_swash_klen = 0;
10283 PL_last_swash_key[0]= '\0';
10284 PL_last_swash_tmps = (U8*)NULL;
10285 PL_last_swash_slen = 0;
10287 /* perly.c globals */
10288 PL_yydebug = proto_perl->Iyydebug;
10289 PL_yynerrs = proto_perl->Iyynerrs;
10290 PL_yyerrflag = proto_perl->Iyyerrflag;
10291 PL_yychar = proto_perl->Iyychar;
10292 PL_yyval = proto_perl->Iyyval;
10293 PL_yylval = proto_perl->Iyylval;
10295 PL_glob_index = proto_perl->Iglob_index;
10296 PL_srand_called = proto_perl->Isrand_called;
10297 PL_uudmap['M'] = 0; /* reinits on demand */
10298 PL_bitcount = Nullch; /* reinits on demand */
10300 if (proto_perl->Ipsig_pend) {
10301 Newz(0, PL_psig_pend, SIG_SIZE, int);
10304 PL_psig_pend = (int*)NULL;
10307 if (proto_perl->Ipsig_ptr) {
10308 Newz(0, PL_psig_ptr, SIG_SIZE, SV*);
10309 Newz(0, PL_psig_name, SIG_SIZE, SV*);
10310 for (i = 1; i < SIG_SIZE; i++) {
10311 PL_psig_ptr[i] = sv_dup_inc(proto_perl->Ipsig_ptr[i], param);
10312 PL_psig_name[i] = sv_dup_inc(proto_perl->Ipsig_name[i], param);
10316 PL_psig_ptr = (SV**)NULL;
10317 PL_psig_name = (SV**)NULL;
10320 /* thrdvar.h stuff */
10322 if (flags & CLONEf_COPY_STACKS) {
10323 /* next allocation will be PL_tmps_stack[PL_tmps_ix+1] */
10324 PL_tmps_ix = proto_perl->Ttmps_ix;
10325 PL_tmps_max = proto_perl->Ttmps_max;
10326 PL_tmps_floor = proto_perl->Ttmps_floor;
10327 Newz(50, PL_tmps_stack, PL_tmps_max, SV*);
10329 while (i <= PL_tmps_ix) {
10330 PL_tmps_stack[i] = sv_dup_inc(proto_perl->Ttmps_stack[i], param);
10334 /* next PUSHMARK() sets *(PL_markstack_ptr+1) */
10335 i = proto_perl->Tmarkstack_max - proto_perl->Tmarkstack;
10336 Newz(54, PL_markstack, i, I32);
10337 PL_markstack_max = PL_markstack + (proto_perl->Tmarkstack_max
10338 - proto_perl->Tmarkstack);
10339 PL_markstack_ptr = PL_markstack + (proto_perl->Tmarkstack_ptr
10340 - proto_perl->Tmarkstack);
10341 Copy(proto_perl->Tmarkstack, PL_markstack,
10342 PL_markstack_ptr - PL_markstack + 1, I32);
10344 /* next push_scope()/ENTER sets PL_scopestack[PL_scopestack_ix]
10345 * NOTE: unlike the others! */
10346 PL_scopestack_ix = proto_perl->Tscopestack_ix;
10347 PL_scopestack_max = proto_perl->Tscopestack_max;
10348 Newz(54, PL_scopestack, PL_scopestack_max, I32);
10349 Copy(proto_perl->Tscopestack, PL_scopestack, PL_scopestack_ix, I32);
10351 /* next push_return() sets PL_retstack[PL_retstack_ix]
10352 * NOTE: unlike the others! */
10353 PL_retstack_ix = proto_perl->Tretstack_ix;
10354 PL_retstack_max = proto_perl->Tretstack_max;
10355 Newz(54, PL_retstack, PL_retstack_max, OP*);
10356 Copy(proto_perl->Tretstack, PL_retstack, PL_retstack_ix, OP*);
10358 /* NOTE: si_dup() looks at PL_markstack */
10359 PL_curstackinfo = si_dup(proto_perl->Tcurstackinfo, param);
10361 /* PL_curstack = PL_curstackinfo->si_stack; */
10362 PL_curstack = av_dup(proto_perl->Tcurstack, param);
10363 PL_mainstack = av_dup(proto_perl->Tmainstack, param);
10365 /* next PUSHs() etc. set *(PL_stack_sp+1) */
10366 PL_stack_base = AvARRAY(PL_curstack);
10367 PL_stack_sp = PL_stack_base + (proto_perl->Tstack_sp
10368 - proto_perl->Tstack_base);
10369 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
10371 /* next SSPUSHFOO() sets PL_savestack[PL_savestack_ix]
10372 * NOTE: unlike the others! */
10373 PL_savestack_ix = proto_perl->Tsavestack_ix;
10374 PL_savestack_max = proto_perl->Tsavestack_max;
10375 /*Newz(54, PL_savestack, PL_savestack_max, ANY);*/
10376 PL_savestack = ss_dup(proto_perl, param);
10380 ENTER; /* perl_destruct() wants to LEAVE; */
10383 PL_start_env = proto_perl->Tstart_env; /* XXXXXX */
10384 PL_top_env = &PL_start_env;
10386 PL_op = proto_perl->Top;
10389 PL_Xpv = (XPV*)NULL;
10390 PL_na = proto_perl->Tna;
10392 PL_statbuf = proto_perl->Tstatbuf;
10393 PL_statcache = proto_perl->Tstatcache;
10394 PL_statgv = gv_dup(proto_perl->Tstatgv, param);
10395 PL_statname = sv_dup_inc(proto_perl->Tstatname, param);
10397 PL_timesbuf = proto_perl->Ttimesbuf;
10400 PL_tainted = proto_perl->Ttainted;
10401 PL_curpm = proto_perl->Tcurpm; /* XXX No PMOP ref count */
10402 PL_rs = sv_dup_inc(proto_perl->Trs, param);
10403 PL_last_in_gv = gv_dup(proto_perl->Tlast_in_gv, param);
10404 PL_ofs_sv = sv_dup_inc(proto_perl->Tofs_sv, param);
10405 PL_defoutgv = gv_dup_inc(proto_perl->Tdefoutgv, param);
10406 PL_chopset = proto_perl->Tchopset; /* XXX never deallocated */
10407 PL_toptarget = sv_dup_inc(proto_perl->Ttoptarget, param);
10408 PL_bodytarget = sv_dup_inc(proto_perl->Tbodytarget, param);
10409 PL_formtarget = sv_dup(proto_perl->Tformtarget, param);
10411 PL_restartop = proto_perl->Trestartop;
10412 PL_in_eval = proto_perl->Tin_eval;
10413 PL_delaymagic = proto_perl->Tdelaymagic;
10414 PL_dirty = proto_perl->Tdirty;
10415 PL_localizing = proto_perl->Tlocalizing;
10417 #ifdef PERL_FLEXIBLE_EXCEPTIONS
10418 PL_protect = proto_perl->Tprotect;
10420 PL_errors = sv_dup_inc(proto_perl->Terrors, param);
10421 PL_av_fetch_sv = Nullsv;
10422 PL_hv_fetch_sv = Nullsv;
10423 Zero(&PL_hv_fetch_ent_mh, 1, HE); /* XXX */
10424 PL_modcount = proto_perl->Tmodcount;
10425 PL_lastgotoprobe = Nullop;
10426 PL_dumpindent = proto_perl->Tdumpindent;
10428 PL_sortcop = (OP*)any_dup(proto_perl->Tsortcop, proto_perl);
10429 PL_sortstash = hv_dup(proto_perl->Tsortstash, param);
10430 PL_firstgv = gv_dup(proto_perl->Tfirstgv, param);
10431 PL_secondgv = gv_dup(proto_perl->Tsecondgv, param);
10432 PL_sortcxix = proto_perl->Tsortcxix;
10433 PL_efloatbuf = Nullch; /* reinits on demand */
10434 PL_efloatsize = 0; /* reinits on demand */
10438 PL_screamfirst = NULL;
10439 PL_screamnext = NULL;
10440 PL_maxscream = -1; /* reinits on demand */
10441 PL_lastscream = Nullsv;
10443 PL_watchaddr = NULL;
10444 PL_watchok = Nullch;
10446 PL_regdummy = proto_perl->Tregdummy;
10447 PL_regcomp_parse = Nullch;
10448 PL_regxend = Nullch;
10449 PL_regcode = (regnode*)NULL;
10452 PL_regprecomp = Nullch;
10457 PL_seen_zerolen = 0;
10459 PL_regcomp_rx = (regexp*)NULL;
10461 PL_colorset = 0; /* reinits PL_colors[] */
10462 /*PL_colors[6] = {0,0,0,0,0,0};*/
10463 PL_reg_whilem_seen = 0;
10464 PL_reginput = Nullch;
10465 PL_regbol = Nullch;
10466 PL_regeol = Nullch;
10467 PL_regstartp = (I32*)NULL;
10468 PL_regendp = (I32*)NULL;
10469 PL_reglastparen = (U32*)NULL;
10470 PL_regtill = Nullch;
10471 PL_reg_start_tmp = (char**)NULL;
10472 PL_reg_start_tmpl = 0;
10473 PL_regdata = (struct reg_data*)NULL;
10476 PL_reg_eval_set = 0;
10478 PL_regprogram = (regnode*)NULL;
10480 PL_regcc = (CURCUR*)NULL;
10481 PL_reg_call_cc = (struct re_cc_state*)NULL;
10482 PL_reg_re = (regexp*)NULL;
10483 PL_reg_ganch = Nullch;
10484 PL_reg_sv = Nullsv;
10485 PL_reg_match_utf8 = FALSE;
10486 PL_reg_magic = (MAGIC*)NULL;
10488 PL_reg_oldcurpm = (PMOP*)NULL;
10489 PL_reg_curpm = (PMOP*)NULL;
10490 PL_reg_oldsaved = Nullch;
10491 PL_reg_oldsavedlen = 0;
10492 PL_reg_maxiter = 0;
10493 PL_reg_leftiter = 0;
10494 PL_reg_poscache = Nullch;
10495 PL_reg_poscache_size= 0;
10497 /* RE engine - function pointers */
10498 PL_regcompp = proto_perl->Tregcompp;
10499 PL_regexecp = proto_perl->Tregexecp;
10500 PL_regint_start = proto_perl->Tregint_start;
10501 PL_regint_string = proto_perl->Tregint_string;
10502 PL_regfree = proto_perl->Tregfree;
10504 PL_reginterp_cnt = 0;
10505 PL_reg_starttry = 0;
10507 /* Pluggable optimizer */
10508 PL_peepp = proto_perl->Tpeepp;
10510 if (!(flags & CLONEf_KEEP_PTR_TABLE)) {
10511 ptr_table_free(PL_ptr_table);
10512 PL_ptr_table = NULL;
10515 /* Call the ->CLONE method, if it exists, for each of the stashes
10516 identified by sv_dup() above.
10518 while(av_len(param->stashes) != -1) {
10519 HV* stash = (HV*) av_shift(param->stashes);
10520 GV* cloner = gv_fetchmethod_autoload(stash, "CLONE", 0);
10521 if (cloner && GvCV(cloner)) {
10526 XPUSHs(sv_2mortal(newSVpv(HvNAME(stash), 0)));
10528 call_sv((SV*)GvCV(cloner), G_DISCARD);
10534 SvREFCNT_dec(param->stashes);
10539 #endif /* USE_ITHREADS */
10542 =head1 Unicode Support
10544 =for apidoc sv_recode_to_utf8
10546 The encoding is assumed to be an Encode object, on entry the PV
10547 of the sv is assumed to be octets in that encoding, and the sv
10548 will be converted into Unicode (and UTF-8).
10550 If the sv already is UTF-8 (or if it is not POK), or if the encoding
10551 is not a reference, nothing is done to the sv. If the encoding is not
10552 an C<Encode::XS> Encoding object, bad things will happen.
10553 (See F<lib/encoding.pm> and L<Encode>).
10555 The PV of the sv is returned.
10560 Perl_sv_recode_to_utf8(pTHX_ SV *sv, SV *encoding)
10562 if (SvPOK(sv) && !DO_UTF8(sv) && SvROK(encoding)) {
10575 Passing sv_yes is wrong - it needs to be or'ed set of constants
10576 for Encode::XS, while UTf-8 decode (currently) assumes a true value means
10577 remove converted chars from source.
10579 Both will default the value - let them.
10581 XPUSHs(&PL_sv_yes);
10584 call_method("decode", G_SCALAR);
10588 s = SvPV(uni, len);
10589 if (s != SvPVX(sv)) {
10590 SvGROW(sv, len + 1);
10591 Move(s, SvPVX(sv), len, char);
10592 SvCUR_set(sv, len);
10593 SvPVX(sv)[len] = 0;