3 * Copyright (c) 1991-2002, Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
8 * "I wonder what the Entish is for 'yes' and 'no'," he thought.
11 * This file contains the code that creates, manipulates and destroys
12 * scalar values (SVs). The other types (AV, HV, GV, etc.) reuse the
13 * structure of an SV, so their creation and destruction is handled
14 * here; higher-level functions are in av.c, hv.c, and so on. Opcode
15 * level functions (eg. substr, split, join) for each of the types are
25 #define SV_CHECK_THINKFIRST(sv) if (SvTHINKFIRST(sv)) sv_force_normal(sv)
28 /* ============================================================================
30 =head1 Allocation and deallocation of SVs.
32 An SV (or AV, HV, etc.) is allocated in two parts: the head (struct sv,
33 av, hv...) contains type and reference count information, as well as a
34 pointer to the body (struct xrv, xpv, xpviv...), which contains fields
35 specific to each type.
37 Normally, this allocation is done using arenas, which are approximately
38 1K chunks of memory parcelled up into N heads or bodies. The first slot
39 in each arena is reserved, and is used to hold a link to the next arena.
40 In the case of heads, the unused first slot also contains some flags and
41 a note of the number of slots. Snaked through each arena chain is a
42 linked list of free items; when this becomes empty, an extra arena is
43 allocated and divided up into N items which are threaded into the free
46 The following global variables are associated with arenas:
48 PL_sv_arenaroot pointer to list of SV arenas
49 PL_sv_root pointer to list of free SV structures
51 PL_foo_arenaroot pointer to list of foo arenas,
52 PL_foo_root pointer to list of free foo bodies
53 ... for foo in xiv, xnv, xrv, xpv etc.
55 Note that some of the larger and more rarely used body types (eg xpvio)
56 are not allocated using arenas, but are instead just malloc()/free()ed as
57 required. Also, if PURIFY is defined, arenas are abandoned altogether,
58 with all items individually malloc()ed. In addition, a few SV heads are
59 not allocated from an arena, but are instead directly created as static
60 or auto variables, eg PL_sv_undef.
62 The SV arena serves the secondary purpose of allowing still-live SVs
63 to be located and destroyed during final cleanup.
65 At the lowest level, the macros new_SV() and del_SV() grab and free
66 an SV head. (If debugging with -DD, del_SV() calls the function S_del_sv()
67 to return the SV to the free list with error checking.) new_SV() calls
68 more_sv() / sv_add_arena() to add an extra arena if the free list is empty.
69 SVs in the free list have their SvTYPE field set to all ones.
71 Similarly, there are macros new_XIV()/del_XIV(), new_XNV()/del_XNV() etc
72 that allocate and return individual body types. Normally these are mapped
73 to the arena-manipulating functions new_xiv()/del_xiv() etc, but may be
74 instead mapped directly to malloc()/free() if PURIFY is defined. The
75 new/del functions remove from, or add to, the appropriate PL_foo_root
76 list, and call more_xiv() etc to add a new arena if the list is empty.
78 At the time of very final cleanup, sv_free_arenas() is called from
79 perl_destruct() to physically free all the arenas allocated since the
80 start of the interpreter. Note that this also clears PL_he_arenaroot,
81 which is otherwise dealt with in hv.c.
83 Manipulation of any of the PL_*root pointers is protected by enclosing
84 LOCK_SV_MUTEX; ... UNLOCK_SV_MUTEX calls which should Do the Right Thing
85 if threads are enabled.
87 The function visit() scans the SV arenas list, and calls a specified
88 function for each SV it finds which is still live - ie which has an SvTYPE
89 other than all 1's, and a non-zero SvREFCNT. visit() is used by the
90 following functions (specified as [function that calls visit()] / [function
91 called by visit() for each SV]):
93 sv_report_used() / do_report_used()
94 dump all remaining SVs (debugging aid)
96 sv_clean_objs() / do_clean_objs(),do_clean_named_objs()
97 Attempt to free all objects pointed to by RVs,
98 and, unless DISABLE_DESTRUCTOR_KLUDGE is defined,
99 try to do the same for all objects indirectly
100 referenced by typeglobs too. Called once from
101 perl_destruct(), prior to calling sv_clean_all()
104 sv_clean_all() / do_clean_all()
105 SvREFCNT_dec(sv) each remaining SV, possibly
106 triggering an sv_free(). It also sets the
107 SVf_BREAK flag on the SV to indicate that the
108 refcnt has been artificially lowered, and thus
109 stopping sv_free() from giving spurious warnings
110 about SVs which unexpectedly have a refcnt
111 of zero. called repeatedly from perl_destruct()
112 until there are no SVs left.
116 Private API to rest of sv.c
120 new_XIV(), del_XIV(),
121 new_XNV(), del_XNV(),
126 sv_report_used(), sv_clean_objs(), sv_clean_all(), sv_free_arenas()
131 ============================================================================ */
136 * "A time to plant, and a time to uproot what was planted..."
139 #define plant_SV(p) \
141 SvANY(p) = (void *)PL_sv_root; \
142 SvFLAGS(p) = SVTYPEMASK; \
147 /* sv_mutex must be held while calling uproot_SV() */
148 #define uproot_SV(p) \
151 PL_sv_root = (SV*)SvANY(p); \
156 /* new_SV(): return a new, empty SV head */
172 /* del_SV(): return an empty SV head to the free list */
187 S_del_sv(pTHX_ SV *p)
194 for (sva = PL_sv_arenaroot; sva; sva = (SV *) SvANY(sva)) {
196 svend = &sva[SvREFCNT(sva)];
197 if (p >= sv && p < svend)
201 if (ckWARN_d(WARN_INTERNAL))
202 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
203 "Attempt to free non-arena SV: 0x%"UVxf,
211 #else /* ! DEBUGGING */
213 #define del_SV(p) plant_SV(p)
215 #endif /* DEBUGGING */
219 =head1 SV Manipulation Functions
221 =for apidoc sv_add_arena
223 Given a chunk of memory, link it to the head of the list of arenas,
224 and split it into a list of free SVs.
230 Perl_sv_add_arena(pTHX_ char *ptr, U32 size, U32 flags)
235 Zero(ptr, size, char);
237 /* The first SV in an arena isn't an SV. */
238 SvANY(sva) = (void *) PL_sv_arenaroot; /* ptr to next arena */
239 SvREFCNT(sva) = size / sizeof(SV); /* number of SV slots */
240 SvFLAGS(sva) = flags; /* FAKE if not to be freed */
242 PL_sv_arenaroot = sva;
243 PL_sv_root = sva + 1;
245 svend = &sva[SvREFCNT(sva) - 1];
248 SvANY(sv) = (void *)(SV*)(sv + 1);
249 SvFLAGS(sv) = SVTYPEMASK;
253 SvFLAGS(sv) = SVTYPEMASK;
256 /* make some more SVs by adding another arena */
258 /* sv_mutex must be held while calling more_sv() */
265 sv_add_arena(PL_nice_chunk, PL_nice_chunk_size, 0);
266 PL_nice_chunk = Nullch;
267 PL_nice_chunk_size = 0;
270 char *chunk; /* must use New here to match call to */
271 New(704,chunk,1008,char); /* Safefree() in sv_free_arenas() */
272 sv_add_arena(chunk, 1008, 0);
278 /* visit(): call the named function for each non-free SV in the arenas. */
281 S_visit(pTHX_ SVFUNC_t f)
288 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
289 svend = &sva[SvREFCNT(sva)];
290 for (sv = sva + 1; sv < svend; ++sv) {
291 if (SvTYPE(sv) != SVTYPEMASK && SvREFCNT(sv)) {
302 /* called by sv_report_used() for each live SV */
305 do_report_used(pTHX_ SV *sv)
307 if (SvTYPE(sv) != SVTYPEMASK) {
308 PerlIO_printf(Perl_debug_log, "****\n");
315 =for apidoc sv_report_used
317 Dump the contents of all SVs not yet freed. (Debugging aid).
323 Perl_sv_report_used(pTHX)
326 visit(do_report_used);
330 /* called by sv_clean_objs() for each live SV */
333 do_clean_objs(pTHX_ SV *sv)
337 if (SvROK(sv) && SvOBJECT(rv = SvRV(sv))) {
338 DEBUG_D((PerlIO_printf(Perl_debug_log, "Cleaning object ref:\n "), sv_dump(sv)));
350 /* XXX Might want to check arrays, etc. */
353 /* called by sv_clean_objs() for each live SV */
355 #ifndef DISABLE_DESTRUCTOR_KLUDGE
357 do_clean_named_objs(pTHX_ SV *sv)
359 if (SvTYPE(sv) == SVt_PVGV && GvGP(sv)) {
360 if ( SvOBJECT(GvSV(sv)) ||
361 (GvAV(sv) && SvOBJECT(GvAV(sv))) ||
362 (GvHV(sv) && SvOBJECT(GvHV(sv))) ||
363 (GvIO(sv) && SvOBJECT(GvIO(sv))) ||
364 (GvCV(sv) && SvOBJECT(GvCV(sv))) )
366 DEBUG_D((PerlIO_printf(Perl_debug_log, "Cleaning named glob object:\n "), sv_dump(sv)));
374 =for apidoc sv_clean_objs
376 Attempt to destroy all objects not yet freed
382 Perl_sv_clean_objs(pTHX)
384 PL_in_clean_objs = TRUE;
385 visit(do_clean_objs);
386 #ifndef DISABLE_DESTRUCTOR_KLUDGE
387 /* some barnacles may yet remain, clinging to typeglobs */
388 visit(do_clean_named_objs);
390 PL_in_clean_objs = FALSE;
393 /* called by sv_clean_all() for each live SV */
396 do_clean_all(pTHX_ SV *sv)
398 DEBUG_D((PerlIO_printf(Perl_debug_log, "Cleaning loops: SV at 0x%"UVxf"\n", PTR2UV(sv)) ));
399 SvFLAGS(sv) |= SVf_BREAK;
404 =for apidoc sv_clean_all
406 Decrement the refcnt of each remaining SV, possibly triggering a
407 cleanup. This function may have to be called multiple times to free
408 SVs which are in complex self-referential hierarchies.
414 Perl_sv_clean_all(pTHX)
417 PL_in_clean_all = TRUE;
418 cleaned = visit(do_clean_all);
419 PL_in_clean_all = FALSE;
424 =for apidoc sv_free_arenas
426 Deallocate the memory used by all arenas. Note that all the individual SV
427 heads and bodies within the arenas must already have been freed.
433 Perl_sv_free_arenas(pTHX)
437 XPV *arena, *arenanext;
439 /* Free arenas here, but be careful about fake ones. (We assume
440 contiguity of the fake ones with the corresponding real ones.) */
442 for (sva = PL_sv_arenaroot; sva; sva = svanext) {
443 svanext = (SV*) SvANY(sva);
444 while (svanext && SvFAKE(svanext))
445 svanext = (SV*) SvANY(svanext);
448 Safefree((void *)sva);
451 for (arena = PL_xiv_arenaroot; arena; arena = arenanext) {
452 arenanext = (XPV*)arena->xpv_pv;
455 PL_xiv_arenaroot = 0;
457 for (arena = PL_xnv_arenaroot; arena; arena = arenanext) {
458 arenanext = (XPV*)arena->xpv_pv;
461 PL_xnv_arenaroot = 0;
463 for (arena = PL_xrv_arenaroot; arena; arena = arenanext) {
464 arenanext = (XPV*)arena->xpv_pv;
467 PL_xrv_arenaroot = 0;
469 for (arena = PL_xpv_arenaroot; arena; arena = arenanext) {
470 arenanext = (XPV*)arena->xpv_pv;
473 PL_xpv_arenaroot = 0;
475 for (arena = (XPV*)PL_xpviv_arenaroot; arena; arena = arenanext) {
476 arenanext = (XPV*)arena->xpv_pv;
479 PL_xpviv_arenaroot = 0;
481 for (arena = (XPV*)PL_xpvnv_arenaroot; arena; arena = arenanext) {
482 arenanext = (XPV*)arena->xpv_pv;
485 PL_xpvnv_arenaroot = 0;
487 for (arena = (XPV*)PL_xpvcv_arenaroot; arena; arena = arenanext) {
488 arenanext = (XPV*)arena->xpv_pv;
491 PL_xpvcv_arenaroot = 0;
493 for (arena = (XPV*)PL_xpvav_arenaroot; arena; arena = arenanext) {
494 arenanext = (XPV*)arena->xpv_pv;
497 PL_xpvav_arenaroot = 0;
499 for (arena = (XPV*)PL_xpvhv_arenaroot; arena; arena = arenanext) {
500 arenanext = (XPV*)arena->xpv_pv;
503 PL_xpvhv_arenaroot = 0;
505 for (arena = (XPV*)PL_xpvmg_arenaroot; arena; arena = arenanext) {
506 arenanext = (XPV*)arena->xpv_pv;
509 PL_xpvmg_arenaroot = 0;
511 for (arena = (XPV*)PL_xpvlv_arenaroot; arena; arena = arenanext) {
512 arenanext = (XPV*)arena->xpv_pv;
515 PL_xpvlv_arenaroot = 0;
517 for (arena = (XPV*)PL_xpvbm_arenaroot; arena; arena = arenanext) {
518 arenanext = (XPV*)arena->xpv_pv;
521 PL_xpvbm_arenaroot = 0;
523 for (arena = (XPV*)PL_he_arenaroot; arena; arena = arenanext) {
524 arenanext = (XPV*)arena->xpv_pv;
530 Safefree(PL_nice_chunk);
531 PL_nice_chunk = Nullch;
532 PL_nice_chunk_size = 0;
538 =for apidoc report_uninit
540 Print appropriate "Use of uninitialized variable" warning
546 Perl_report_uninit(pTHX)
549 Perl_warner(aTHX_ packWARN(WARN_UNINITIALIZED), PL_warn_uninit,
550 " in ", OP_DESC(PL_op));
552 Perl_warner(aTHX_ packWARN(WARN_UNINITIALIZED), PL_warn_uninit, "", "");
555 /* grab a new IV body from the free list, allocating more if necessary */
566 * See comment in more_xiv() -- RAM.
568 PL_xiv_root = *(IV**)xiv;
570 return (XPVIV*)((char*)xiv - STRUCT_OFFSET(XPVIV, xiv_iv));
573 /* return an IV body to the free list */
576 S_del_xiv(pTHX_ XPVIV *p)
578 IV* xiv = (IV*)((char*)(p) + STRUCT_OFFSET(XPVIV, xiv_iv));
580 *(IV**)xiv = PL_xiv_root;
585 /* allocate another arena's worth of IV bodies */
593 New(705, ptr, 1008/sizeof(XPV), XPV);
594 ptr->xpv_pv = (char*)PL_xiv_arenaroot; /* linked list of xiv arenas */
595 PL_xiv_arenaroot = ptr; /* to keep Purify happy */
598 xivend = &xiv[1008 / sizeof(IV) - 1];
599 xiv += (sizeof(XPV) - 1) / sizeof(IV) + 1; /* fudge by size of XPV */
601 while (xiv < xivend) {
602 *(IV**)xiv = (IV *)(xiv + 1);
608 /* grab a new NV body from the free list, allocating more if necessary */
618 PL_xnv_root = *(NV**)xnv;
620 return (XPVNV*)((char*)xnv - STRUCT_OFFSET(XPVNV, xnv_nv));
623 /* return an NV body to the free list */
626 S_del_xnv(pTHX_ XPVNV *p)
628 NV* xnv = (NV*)((char*)(p) + STRUCT_OFFSET(XPVNV, xnv_nv));
630 *(NV**)xnv = PL_xnv_root;
635 /* allocate another arena's worth of NV bodies */
643 New(711, ptr, 1008/sizeof(XPV), XPV);
644 ptr->xpv_pv = (char*)PL_xnv_arenaroot;
645 PL_xnv_arenaroot = ptr;
648 xnvend = &xnv[1008 / sizeof(NV) - 1];
649 xnv += (sizeof(XPVIV) - 1) / sizeof(NV) + 1; /* fudge by sizeof XPVIV */
651 while (xnv < xnvend) {
652 *(NV**)xnv = (NV*)(xnv + 1);
658 /* grab a new struct xrv from the free list, allocating more if necessary */
668 PL_xrv_root = (XRV*)xrv->xrv_rv;
673 /* return a struct xrv to the free list */
676 S_del_xrv(pTHX_ XRV *p)
679 p->xrv_rv = (SV*)PL_xrv_root;
684 /* allocate another arena's worth of struct xrv */
690 register XRV* xrvend;
692 New(712, ptr, 1008/sizeof(XPV), XPV);
693 ptr->xpv_pv = (char*)PL_xrv_arenaroot;
694 PL_xrv_arenaroot = ptr;
697 xrvend = &xrv[1008 / sizeof(XRV) - 1];
698 xrv += (sizeof(XPV) - 1) / sizeof(XRV) + 1;
700 while (xrv < xrvend) {
701 xrv->xrv_rv = (SV*)(xrv + 1);
707 /* grab a new struct xpv from the free list, allocating more if necessary */
717 PL_xpv_root = (XPV*)xpv->xpv_pv;
722 /* return a struct xpv to the free list */
725 S_del_xpv(pTHX_ XPV *p)
728 p->xpv_pv = (char*)PL_xpv_root;
733 /* allocate another arena's worth of struct xpv */
739 register XPV* xpvend;
740 New(713, xpv, 1008/sizeof(XPV), XPV);
741 xpv->xpv_pv = (char*)PL_xpv_arenaroot;
742 PL_xpv_arenaroot = xpv;
744 xpvend = &xpv[1008 / sizeof(XPV) - 1];
746 while (xpv < xpvend) {
747 xpv->xpv_pv = (char*)(xpv + 1);
753 /* grab a new struct xpviv from the free list, allocating more if necessary */
762 xpviv = PL_xpviv_root;
763 PL_xpviv_root = (XPVIV*)xpviv->xpv_pv;
768 /* return a struct xpviv to the free list */
771 S_del_xpviv(pTHX_ XPVIV *p)
774 p->xpv_pv = (char*)PL_xpviv_root;
779 /* allocate another arena's worth of struct xpviv */
784 register XPVIV* xpviv;
785 register XPVIV* xpvivend;
786 New(714, xpviv, 1008/sizeof(XPVIV), XPVIV);
787 xpviv->xpv_pv = (char*)PL_xpviv_arenaroot;
788 PL_xpviv_arenaroot = xpviv;
790 xpvivend = &xpviv[1008 / sizeof(XPVIV) - 1];
791 PL_xpviv_root = ++xpviv;
792 while (xpviv < xpvivend) {
793 xpviv->xpv_pv = (char*)(xpviv + 1);
799 /* grab a new struct xpvnv from the free list, allocating more if necessary */
808 xpvnv = PL_xpvnv_root;
809 PL_xpvnv_root = (XPVNV*)xpvnv->xpv_pv;
814 /* return a struct xpvnv to the free list */
817 S_del_xpvnv(pTHX_ XPVNV *p)
820 p->xpv_pv = (char*)PL_xpvnv_root;
825 /* allocate another arena's worth of struct xpvnv */
830 register XPVNV* xpvnv;
831 register XPVNV* xpvnvend;
832 New(715, xpvnv, 1008/sizeof(XPVNV), XPVNV);
833 xpvnv->xpv_pv = (char*)PL_xpvnv_arenaroot;
834 PL_xpvnv_arenaroot = xpvnv;
836 xpvnvend = &xpvnv[1008 / sizeof(XPVNV) - 1];
837 PL_xpvnv_root = ++xpvnv;
838 while (xpvnv < xpvnvend) {
839 xpvnv->xpv_pv = (char*)(xpvnv + 1);
845 /* grab a new struct xpvcv from the free list, allocating more if necessary */
854 xpvcv = PL_xpvcv_root;
855 PL_xpvcv_root = (XPVCV*)xpvcv->xpv_pv;
860 /* return a struct xpvcv to the free list */
863 S_del_xpvcv(pTHX_ XPVCV *p)
866 p->xpv_pv = (char*)PL_xpvcv_root;
871 /* allocate another arena's worth of struct xpvcv */
876 register XPVCV* xpvcv;
877 register XPVCV* xpvcvend;
878 New(716, xpvcv, 1008/sizeof(XPVCV), XPVCV);
879 xpvcv->xpv_pv = (char*)PL_xpvcv_arenaroot;
880 PL_xpvcv_arenaroot = xpvcv;
882 xpvcvend = &xpvcv[1008 / sizeof(XPVCV) - 1];
883 PL_xpvcv_root = ++xpvcv;
884 while (xpvcv < xpvcvend) {
885 xpvcv->xpv_pv = (char*)(xpvcv + 1);
891 /* grab a new struct xpvav from the free list, allocating more if necessary */
900 xpvav = PL_xpvav_root;
901 PL_xpvav_root = (XPVAV*)xpvav->xav_array;
906 /* return a struct xpvav to the free list */
909 S_del_xpvav(pTHX_ XPVAV *p)
912 p->xav_array = (char*)PL_xpvav_root;
917 /* allocate another arena's worth of struct xpvav */
922 register XPVAV* xpvav;
923 register XPVAV* xpvavend;
924 New(717, xpvav, 1008/sizeof(XPVAV), XPVAV);
925 xpvav->xav_array = (char*)PL_xpvav_arenaroot;
926 PL_xpvav_arenaroot = xpvav;
928 xpvavend = &xpvav[1008 / sizeof(XPVAV) - 1];
929 PL_xpvav_root = ++xpvav;
930 while (xpvav < xpvavend) {
931 xpvav->xav_array = (char*)(xpvav + 1);
934 xpvav->xav_array = 0;
937 /* grab a new struct xpvhv from the free list, allocating more if necessary */
946 xpvhv = PL_xpvhv_root;
947 PL_xpvhv_root = (XPVHV*)xpvhv->xhv_array;
952 /* return a struct xpvhv to the free list */
955 S_del_xpvhv(pTHX_ XPVHV *p)
958 p->xhv_array = (char*)PL_xpvhv_root;
963 /* allocate another arena's worth of struct xpvhv */
968 register XPVHV* xpvhv;
969 register XPVHV* xpvhvend;
970 New(718, xpvhv, 1008/sizeof(XPVHV), XPVHV);
971 xpvhv->xhv_array = (char*)PL_xpvhv_arenaroot;
972 PL_xpvhv_arenaroot = xpvhv;
974 xpvhvend = &xpvhv[1008 / sizeof(XPVHV) - 1];
975 PL_xpvhv_root = ++xpvhv;
976 while (xpvhv < xpvhvend) {
977 xpvhv->xhv_array = (char*)(xpvhv + 1);
980 xpvhv->xhv_array = 0;
983 /* grab a new struct xpvmg from the free list, allocating more if necessary */
992 xpvmg = PL_xpvmg_root;
993 PL_xpvmg_root = (XPVMG*)xpvmg->xpv_pv;
998 /* return a struct xpvmg to the free list */
1001 S_del_xpvmg(pTHX_ XPVMG *p)
1004 p->xpv_pv = (char*)PL_xpvmg_root;
1009 /* allocate another arena's worth of struct xpvmg */
1014 register XPVMG* xpvmg;
1015 register XPVMG* xpvmgend;
1016 New(719, xpvmg, 1008/sizeof(XPVMG), XPVMG);
1017 xpvmg->xpv_pv = (char*)PL_xpvmg_arenaroot;
1018 PL_xpvmg_arenaroot = xpvmg;
1020 xpvmgend = &xpvmg[1008 / sizeof(XPVMG) - 1];
1021 PL_xpvmg_root = ++xpvmg;
1022 while (xpvmg < xpvmgend) {
1023 xpvmg->xpv_pv = (char*)(xpvmg + 1);
1029 /* grab a new struct xpvlv from the free list, allocating more if necessary */
1038 xpvlv = PL_xpvlv_root;
1039 PL_xpvlv_root = (XPVLV*)xpvlv->xpv_pv;
1044 /* return a struct xpvlv to the free list */
1047 S_del_xpvlv(pTHX_ XPVLV *p)
1050 p->xpv_pv = (char*)PL_xpvlv_root;
1055 /* allocate another arena's worth of struct xpvlv */
1060 register XPVLV* xpvlv;
1061 register XPVLV* xpvlvend;
1062 New(720, xpvlv, 1008/sizeof(XPVLV), XPVLV);
1063 xpvlv->xpv_pv = (char*)PL_xpvlv_arenaroot;
1064 PL_xpvlv_arenaroot = xpvlv;
1066 xpvlvend = &xpvlv[1008 / sizeof(XPVLV) - 1];
1067 PL_xpvlv_root = ++xpvlv;
1068 while (xpvlv < xpvlvend) {
1069 xpvlv->xpv_pv = (char*)(xpvlv + 1);
1075 /* grab a new struct xpvbm from the free list, allocating more if necessary */
1084 xpvbm = PL_xpvbm_root;
1085 PL_xpvbm_root = (XPVBM*)xpvbm->xpv_pv;
1090 /* return a struct xpvbm to the free list */
1093 S_del_xpvbm(pTHX_ XPVBM *p)
1096 p->xpv_pv = (char*)PL_xpvbm_root;
1101 /* allocate another arena's worth of struct xpvbm */
1106 register XPVBM* xpvbm;
1107 register XPVBM* xpvbmend;
1108 New(721, xpvbm, 1008/sizeof(XPVBM), XPVBM);
1109 xpvbm->xpv_pv = (char*)PL_xpvbm_arenaroot;
1110 PL_xpvbm_arenaroot = xpvbm;
1112 xpvbmend = &xpvbm[1008 / sizeof(XPVBM) - 1];
1113 PL_xpvbm_root = ++xpvbm;
1114 while (xpvbm < xpvbmend) {
1115 xpvbm->xpv_pv = (char*)(xpvbm + 1);
1122 # define my_safemalloc(s) (void*)safexmalloc(717,s)
1123 # define my_safefree(p) safexfree((char*)p)
1125 # define my_safemalloc(s) (void*)safemalloc(s)
1126 # define my_safefree(p) safefree((char*)p)
1131 #define new_XIV() my_safemalloc(sizeof(XPVIV))
1132 #define del_XIV(p) my_safefree(p)
1134 #define new_XNV() my_safemalloc(sizeof(XPVNV))
1135 #define del_XNV(p) my_safefree(p)
1137 #define new_XRV() my_safemalloc(sizeof(XRV))
1138 #define del_XRV(p) my_safefree(p)
1140 #define new_XPV() my_safemalloc(sizeof(XPV))
1141 #define del_XPV(p) my_safefree(p)
1143 #define new_XPVIV() my_safemalloc(sizeof(XPVIV))
1144 #define del_XPVIV(p) my_safefree(p)
1146 #define new_XPVNV() my_safemalloc(sizeof(XPVNV))
1147 #define del_XPVNV(p) my_safefree(p)
1149 #define new_XPVCV() my_safemalloc(sizeof(XPVCV))
1150 #define del_XPVCV(p) my_safefree(p)
1152 #define new_XPVAV() my_safemalloc(sizeof(XPVAV))
1153 #define del_XPVAV(p) my_safefree(p)
1155 #define new_XPVHV() my_safemalloc(sizeof(XPVHV))
1156 #define del_XPVHV(p) my_safefree(p)
1158 #define new_XPVMG() my_safemalloc(sizeof(XPVMG))
1159 #define del_XPVMG(p) my_safefree(p)
1161 #define new_XPVLV() my_safemalloc(sizeof(XPVLV))
1162 #define del_XPVLV(p) my_safefree(p)
1164 #define new_XPVBM() my_safemalloc(sizeof(XPVBM))
1165 #define del_XPVBM(p) my_safefree(p)
1169 #define new_XIV() (void*)new_xiv()
1170 #define del_XIV(p) del_xiv((XPVIV*) p)
1172 #define new_XNV() (void*)new_xnv()
1173 #define del_XNV(p) del_xnv((XPVNV*) p)
1175 #define new_XRV() (void*)new_xrv()
1176 #define del_XRV(p) del_xrv((XRV*) p)
1178 #define new_XPV() (void*)new_xpv()
1179 #define del_XPV(p) del_xpv((XPV *)p)
1181 #define new_XPVIV() (void*)new_xpviv()
1182 #define del_XPVIV(p) del_xpviv((XPVIV *)p)
1184 #define new_XPVNV() (void*)new_xpvnv()
1185 #define del_XPVNV(p) del_xpvnv((XPVNV *)p)
1187 #define new_XPVCV() (void*)new_xpvcv()
1188 #define del_XPVCV(p) del_xpvcv((XPVCV *)p)
1190 #define new_XPVAV() (void*)new_xpvav()
1191 #define del_XPVAV(p) del_xpvav((XPVAV *)p)
1193 #define new_XPVHV() (void*)new_xpvhv()
1194 #define del_XPVHV(p) del_xpvhv((XPVHV *)p)
1196 #define new_XPVMG() (void*)new_xpvmg()
1197 #define del_XPVMG(p) del_xpvmg((XPVMG *)p)
1199 #define new_XPVLV() (void*)new_xpvlv()
1200 #define del_XPVLV(p) del_xpvlv((XPVLV *)p)
1202 #define new_XPVBM() (void*)new_xpvbm()
1203 #define del_XPVBM(p) del_xpvbm((XPVBM *)p)
1207 #define new_XPVGV() my_safemalloc(sizeof(XPVGV))
1208 #define del_XPVGV(p) my_safefree(p)
1210 #define new_XPVFM() my_safemalloc(sizeof(XPVFM))
1211 #define del_XPVFM(p) my_safefree(p)
1213 #define new_XPVIO() my_safemalloc(sizeof(XPVIO))
1214 #define del_XPVIO(p) my_safefree(p)
1217 =for apidoc sv_upgrade
1219 Upgrade an SV to a more complex form. Generally adds a new body type to the
1220 SV, then copies across as much information as possible from the old body.
1221 You generally want to use the C<SvUPGRADE> macro wrapper. See also C<svtype>.
1227 Perl_sv_upgrade(pTHX_ register SV *sv, U32 mt)
1234 MAGIC* magic = NULL;
1237 if (mt != SVt_PV && SvREADONLY(sv) && SvFAKE(sv)) {
1238 sv_force_normal(sv);
1241 if (SvTYPE(sv) == mt)
1245 (void)SvOOK_off(sv);
1247 switch (SvTYPE(sv)) {
1268 else if (mt < SVt_PVIV)
1285 pv = (char*)SvRV(sv);
1305 else if (mt == SVt_NV)
1316 del_XPVIV(SvANY(sv));
1326 del_XPVNV(SvANY(sv));
1334 magic = SvMAGIC(sv);
1335 stash = SvSTASH(sv);
1336 del_XPVMG(SvANY(sv));
1339 Perl_croak(aTHX_ "Can't upgrade that kind of scalar");
1344 Perl_croak(aTHX_ "Can't upgrade to undef");
1346 SvANY(sv) = new_XIV();
1350 SvANY(sv) = new_XNV();
1354 SvANY(sv) = new_XRV();
1358 SvANY(sv) = new_XPV();
1364 SvANY(sv) = new_XPVIV();
1374 SvANY(sv) = new_XPVNV();
1382 SvANY(sv) = new_XPVMG();
1388 SvMAGIC(sv) = magic;
1389 SvSTASH(sv) = stash;
1392 SvANY(sv) = new_XPVLV();
1398 SvMAGIC(sv) = magic;
1399 SvSTASH(sv) = stash;
1406 SvANY(sv) = new_XPVAV();
1414 SvMAGIC(sv) = magic;
1415 SvSTASH(sv) = stash;
1421 SvANY(sv) = new_XPVHV();
1427 HvTOTALKEYS(sv) = 0;
1428 HvPLACEHOLDERS(sv) = 0;
1429 SvMAGIC(sv) = magic;
1430 SvSTASH(sv) = stash;
1437 SvANY(sv) = new_XPVCV();
1438 Zero(SvANY(sv), 1, XPVCV);
1444 SvMAGIC(sv) = magic;
1445 SvSTASH(sv) = stash;
1448 SvANY(sv) = new_XPVGV();
1454 SvMAGIC(sv) = magic;
1455 SvSTASH(sv) = stash;
1463 SvANY(sv) = new_XPVBM();
1469 SvMAGIC(sv) = magic;
1470 SvSTASH(sv) = stash;
1476 SvANY(sv) = new_XPVFM();
1477 Zero(SvANY(sv), 1, XPVFM);
1483 SvMAGIC(sv) = magic;
1484 SvSTASH(sv) = stash;
1487 SvANY(sv) = new_XPVIO();
1488 Zero(SvANY(sv), 1, XPVIO);
1494 SvMAGIC(sv) = magic;
1495 SvSTASH(sv) = stash;
1496 IoPAGE_LEN(sv) = 60;
1499 SvFLAGS(sv) &= ~SVTYPEMASK;
1505 =for apidoc sv_backoff
1507 Remove any string offset. You should normally use the C<SvOOK_off> macro
1514 Perl_sv_backoff(pTHX_ register SV *sv)
1518 char *s = SvPVX(sv);
1519 SvLEN(sv) += SvIVX(sv);
1520 SvPVX(sv) -= SvIVX(sv);
1522 Move(s, SvPVX(sv), SvCUR(sv)+1, char);
1524 SvFLAGS(sv) &= ~SVf_OOK;
1531 Expands the character buffer in the SV. If necessary, uses C<sv_unref> and
1532 upgrades the SV to C<SVt_PV>. Returns a pointer to the character buffer.
1533 Use the C<SvGROW> wrapper instead.
1539 Perl_sv_grow(pTHX_ register SV *sv, register STRLEN newlen)
1545 #ifdef HAS_64K_LIMIT
1546 if (newlen >= 0x10000) {
1547 PerlIO_printf(Perl_debug_log,
1548 "Allocation too large: %"UVxf"\n", (UV)newlen);
1551 #endif /* HAS_64K_LIMIT */
1554 if (SvTYPE(sv) < SVt_PV) {
1555 sv_upgrade(sv, SVt_PV);
1558 else if (SvOOK(sv)) { /* pv is offset? */
1561 if (newlen > SvLEN(sv))
1562 newlen += 10 * (newlen - SvCUR(sv)); /* avoid copy each time */
1563 #ifdef HAS_64K_LIMIT
1564 if (newlen >= 0x10000)
1571 if (newlen > SvLEN(sv)) { /* need more room? */
1572 if (SvLEN(sv) && s) {
1573 #if defined(MYMALLOC) && !defined(LEAKTEST)
1574 STRLEN l = malloced_size((void*)SvPVX(sv));
1580 Renew(s,newlen,char);
1583 /* sv_force_normal_flags() must not try to unshare the new
1584 PVX we allocate below. AMS 20010713 */
1585 if (SvREADONLY(sv) && SvFAKE(sv)) {
1589 New(703, s, newlen, char);
1590 if (SvPVX(sv) && SvCUR(sv)) {
1591 Move(SvPVX(sv), s, (newlen < SvCUR(sv)) ? newlen : SvCUR(sv), char);
1595 SvLEN_set(sv, newlen);
1601 =for apidoc sv_setiv
1603 Copies an integer into the given SV, upgrading first if necessary.
1604 Does not handle 'set' magic. See also C<sv_setiv_mg>.
1610 Perl_sv_setiv(pTHX_ register SV *sv, IV i)
1612 SV_CHECK_THINKFIRST(sv);
1613 switch (SvTYPE(sv)) {
1615 sv_upgrade(sv, SVt_IV);
1618 sv_upgrade(sv, SVt_PVNV);
1622 sv_upgrade(sv, SVt_PVIV);
1631 Perl_croak(aTHX_ "Can't coerce %s to integer in %s", sv_reftype(sv,0),
1634 (void)SvIOK_only(sv); /* validate number */
1640 =for apidoc sv_setiv_mg
1642 Like C<sv_setiv>, but also handles 'set' magic.
1648 Perl_sv_setiv_mg(pTHX_ register SV *sv, IV i)
1655 =for apidoc sv_setuv
1657 Copies an unsigned integer into the given SV, upgrading first if necessary.
1658 Does not handle 'set' magic. See also C<sv_setuv_mg>.
1664 Perl_sv_setuv(pTHX_ register SV *sv, UV u)
1666 /* With these two if statements:
1667 u=1.49 s=0.52 cu=72.49 cs=10.64 scripts=270 tests=20865
1670 u=1.35 s=0.47 cu=73.45 cs=11.43 scripts=270 tests=20865
1672 If you wish to remove them, please benchmark to see what the effect is
1674 if (u <= (UV)IV_MAX) {
1675 sv_setiv(sv, (IV)u);
1684 =for apidoc sv_setuv_mg
1686 Like C<sv_setuv>, but also handles 'set' magic.
1692 Perl_sv_setuv_mg(pTHX_ register SV *sv, UV u)
1694 /* With these two if statements:
1695 u=1.49 s=0.52 cu=72.49 cs=10.64 scripts=270 tests=20865
1698 u=1.35 s=0.47 cu=73.45 cs=11.43 scripts=270 tests=20865
1700 If you wish to remove them, please benchmark to see what the effect is
1702 if (u <= (UV)IV_MAX) {
1703 sv_setiv(sv, (IV)u);
1713 =for apidoc sv_setnv
1715 Copies a double into the given SV, upgrading first if necessary.
1716 Does not handle 'set' magic. See also C<sv_setnv_mg>.
1722 Perl_sv_setnv(pTHX_ register SV *sv, NV num)
1724 SV_CHECK_THINKFIRST(sv);
1725 switch (SvTYPE(sv)) {
1728 sv_upgrade(sv, SVt_NV);
1733 sv_upgrade(sv, SVt_PVNV);
1742 Perl_croak(aTHX_ "Can't coerce %s to number in %s", sv_reftype(sv,0),
1746 (void)SvNOK_only(sv); /* validate number */
1751 =for apidoc sv_setnv_mg
1753 Like C<sv_setnv>, but also handles 'set' magic.
1759 Perl_sv_setnv_mg(pTHX_ register SV *sv, NV num)
1765 /* Print an "isn't numeric" warning, using a cleaned-up,
1766 * printable version of the offending string
1770 S_not_a_number(pTHX_ SV *sv)
1777 dsv = sv_2mortal(newSVpv("", 0));
1778 pv = sv_uni_display(dsv, sv, 10, 0);
1781 char *limit = tmpbuf + sizeof(tmpbuf) - 8;
1782 /* each *s can expand to 4 chars + "...\0",
1783 i.e. need room for 8 chars */
1786 for (s = SvPVX(sv), end = s + SvCUR(sv); s < end && d < limit; s++) {
1788 if (ch & 128 && !isPRINT_LC(ch)) {
1797 else if (ch == '\r') {
1801 else if (ch == '\f') {
1805 else if (ch == '\\') {
1809 else if (ch == '\0') {
1813 else if (isPRINT_LC(ch))
1830 Perl_warner(aTHX_ packWARN(WARN_NUMERIC),
1831 "Argument \"%s\" isn't numeric in %s", pv,
1834 Perl_warner(aTHX_ packWARN(WARN_NUMERIC),
1835 "Argument \"%s\" isn't numeric", pv);
1839 =for apidoc looks_like_number
1841 Test if the content of an SV looks like a number (or is a number).
1842 C<Inf> and C<Infinity> are treated as numbers (so will not issue a
1843 non-numeric warning), even if your atof() doesn't grok them.
1849 Perl_looks_like_number(pTHX_ SV *sv)
1851 register char *sbegin;
1858 else if (SvPOKp(sv))
1859 sbegin = SvPV(sv, len);
1861 return 1; /* Historic. Wrong? */
1862 return grok_number(sbegin, len, NULL);
1865 /* Actually, ISO C leaves conversion of UV to IV undefined, but
1866 until proven guilty, assume that things are not that bad... */
1871 As 64 bit platforms often have an NV that doesn't preserve all bits of
1872 an IV (an assumption perl has been based on to date) it becomes necessary
1873 to remove the assumption that the NV always carries enough precision to
1874 recreate the IV whenever needed, and that the NV is the canonical form.
1875 Instead, IV/UV and NV need to be given equal rights. So as to not lose
1876 precision as a side effect of conversion (which would lead to insanity
1877 and the dragon(s) in t/op/numconvert.t getting very angry) the intent is
1878 1) to distinguish between IV/UV/NV slots that have cached a valid
1879 conversion where precision was lost and IV/UV/NV slots that have a
1880 valid conversion which has lost no precision
1881 2) to ensure that if a numeric conversion to one form is requested that
1882 would lose precision, the precise conversion (or differently
1883 imprecise conversion) is also performed and cached, to prevent
1884 requests for different numeric formats on the same SV causing
1885 lossy conversion chains. (lossless conversion chains are perfectly
1890 SvIOKp is true if the IV slot contains a valid value
1891 SvIOK is true only if the IV value is accurate (UV if SvIOK_UV true)
1892 SvNOKp is true if the NV slot contains a valid value
1893 SvNOK is true only if the NV value is accurate
1896 while converting from PV to NV, check to see if converting that NV to an
1897 IV(or UV) would lose accuracy over a direct conversion from PV to
1898 IV(or UV). If it would, cache both conversions, return NV, but mark
1899 SV as IOK NOKp (ie not NOK).
1901 While converting from PV to IV, check to see if converting that IV to an
1902 NV would lose accuracy over a direct conversion from PV to NV. If it
1903 would, cache both conversions, flag similarly.
1905 Before, the SV value "3.2" could become NV=3.2 IV=3 NOK, IOK quite
1906 correctly because if IV & NV were set NV *always* overruled.
1907 Now, "3.2" will become NV=3.2 IV=3 NOK, IOKp, because the flag's meaning
1908 changes - now IV and NV together means that the two are interchangeable:
1909 SvIVX == (IV) SvNVX && SvNVX == (NV) SvIVX;
1911 The benefit of this is that operations such as pp_add know that if
1912 SvIOK is true for both left and right operands, then integer addition
1913 can be used instead of floating point (for cases where the result won't
1914 overflow). Before, floating point was always used, which could lead to
1915 loss of precision compared with integer addition.
1917 * making IV and NV equal status should make maths accurate on 64 bit
1919 * may speed up maths somewhat if pp_add and friends start to use
1920 integers when possible instead of fp. (Hopefully the overhead in
1921 looking for SvIOK and checking for overflow will not outweigh the
1922 fp to integer speedup)
1923 * will slow down integer operations (callers of SvIV) on "inaccurate"
1924 values, as the change from SvIOK to SvIOKp will cause a call into
1925 sv_2iv each time rather than a macro access direct to the IV slot
1926 * should speed up number->string conversion on integers as IV is
1927 favoured when IV and NV are equally accurate
1929 ####################################################################
1930 You had better be using SvIOK_notUV if you want an IV for arithmetic:
1931 SvIOK is true if (IV or UV), so you might be getting (IV)SvUV.
1932 On the other hand, SvUOK is true iff UV.
1933 ####################################################################
1935 Your mileage will vary depending your CPU's relative fp to integer
1939 #ifndef NV_PRESERVES_UV
1940 # define IS_NUMBER_UNDERFLOW_IV 1
1941 # define IS_NUMBER_UNDERFLOW_UV 2
1942 # define IS_NUMBER_IV_AND_UV 2
1943 # define IS_NUMBER_OVERFLOW_IV 4
1944 # define IS_NUMBER_OVERFLOW_UV 5
1946 /* sv_2iuv_non_preserve(): private routine for use by sv_2iv() and sv_2uv() */
1948 /* For sv_2nv these three cases are "SvNOK and don't bother casting" */
1950 S_sv_2iuv_non_preserve(pTHX_ register SV *sv, I32 numtype)
1952 DEBUG_c(PerlIO_printf(Perl_debug_log,"sv_2iuv_non '%s', IV=0x%"UVxf" NV=%"NVgf" inttype=%"UVXf"\n", SvPVX(sv), SvIVX(sv), SvNVX(sv), (UV)numtype));
1953 if (SvNVX(sv) < (NV)IV_MIN) {
1954 (void)SvIOKp_on(sv);
1957 return IS_NUMBER_UNDERFLOW_IV;
1959 if (SvNVX(sv) > (NV)UV_MAX) {
1960 (void)SvIOKp_on(sv);
1964 return IS_NUMBER_OVERFLOW_UV;
1966 (void)SvIOKp_on(sv);
1968 /* Can't use strtol etc to convert this string. (See truth table in
1970 if (SvNVX(sv) <= (UV)IV_MAX) {
1971 SvIVX(sv) = I_V(SvNVX(sv));
1972 if ((NV)(SvIVX(sv)) == SvNVX(sv)) {
1973 SvIOK_on(sv); /* Integer is precise. NOK, IOK */
1975 /* Integer is imprecise. NOK, IOKp */
1977 return SvNVX(sv) < 0 ? IS_NUMBER_UNDERFLOW_UV : IS_NUMBER_IV_AND_UV;
1980 SvUVX(sv) = U_V(SvNVX(sv));
1981 if ((NV)(SvUVX(sv)) == SvNVX(sv)) {
1982 if (SvUVX(sv) == UV_MAX) {
1983 /* As we know that NVs don't preserve UVs, UV_MAX cannot
1984 possibly be preserved by NV. Hence, it must be overflow.
1986 return IS_NUMBER_OVERFLOW_UV;
1988 SvIOK_on(sv); /* Integer is precise. NOK, UOK */
1990 /* Integer is imprecise. NOK, IOKp */
1992 return IS_NUMBER_OVERFLOW_IV;
1994 #endif /* !NV_PRESERVES_UV*/
1999 Return the integer value of an SV, doing any necessary string conversion,
2000 magic etc. Normally used via the C<SvIV(sv)> and C<SvIVx(sv)> macros.
2006 Perl_sv_2iv(pTHX_ register SV *sv)
2010 if (SvGMAGICAL(sv)) {
2015 return I_V(SvNVX(sv));
2017 if (SvPOKp(sv) && SvLEN(sv))
2020 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
2021 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
2027 if (SvTHINKFIRST(sv)) {
2030 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,numer)) &&
2031 (SvTYPE(tmpstr) != SVt_RV || (SvRV(tmpstr) != SvRV(sv))))
2032 return SvIV(tmpstr);
2033 return PTR2IV(SvRV(sv));
2035 if (SvREADONLY(sv) && SvFAKE(sv)) {
2036 sv_force_normal(sv);
2038 if (SvREADONLY(sv) && !SvOK(sv)) {
2039 if (ckWARN(WARN_UNINITIALIZED))
2046 return (IV)(SvUVX(sv));
2053 /* erm. not sure. *should* never get NOKp (without NOK) from sv_2nv
2054 * without also getting a cached IV/UV from it at the same time
2055 * (ie PV->NV conversion should detect loss of accuracy and cache
2056 * IV or UV at same time to avoid this. NWC */
2058 if (SvTYPE(sv) == SVt_NV)
2059 sv_upgrade(sv, SVt_PVNV);
2061 (void)SvIOKp_on(sv); /* Must do this first, to clear any SvOOK */
2062 /* < not <= as for NV doesn't preserve UV, ((NV)IV_MAX+1) will almost
2063 certainly cast into the IV range at IV_MAX, whereas the correct
2064 answer is the UV IV_MAX +1. Hence < ensures that dodgy boundary
2066 if (SvNVX(sv) < (NV)IV_MAX + 0.5) {
2067 SvIVX(sv) = I_V(SvNVX(sv));
2068 if (SvNVX(sv) == (NV) SvIVX(sv)
2069 #ifndef NV_PRESERVES_UV
2070 && (((UV)1 << NV_PRESERVES_UV_BITS) >
2071 (UV)(SvIVX(sv) > 0 ? SvIVX(sv) : -SvIVX(sv)))
2072 /* Don't flag it as "accurately an integer" if the number
2073 came from a (by definition imprecise) NV operation, and
2074 we're outside the range of NV integer precision */
2077 SvIOK_on(sv); /* Can this go wrong with rounding? NWC */
2078 DEBUG_c(PerlIO_printf(Perl_debug_log,
2079 "0x%"UVxf" iv(%"NVgf" => %"IVdf") (precise)\n",
2085 /* IV not precise. No need to convert from PV, as NV
2086 conversion would already have cached IV if it detected
2087 that PV->IV would be better than PV->NV->IV
2088 flags already correct - don't set public IOK. */
2089 DEBUG_c(PerlIO_printf(Perl_debug_log,
2090 "0x%"UVxf" iv(%"NVgf" => %"IVdf") (imprecise)\n",
2095 /* Can the above go wrong if SvIVX == IV_MIN and SvNVX < IV_MIN,
2096 but the cast (NV)IV_MIN rounds to a the value less (more
2097 negative) than IV_MIN which happens to be equal to SvNVX ??
2098 Analogous to 0xFFFFFFFFFFFFFFFF rounding up to NV (2**64) and
2099 NV rounding back to 0xFFFFFFFFFFFFFFFF, so UVX == UV(NVX) and
2100 (NV)UVX == NVX are both true, but the values differ. :-(
2101 Hopefully for 2s complement IV_MIN is something like
2102 0x8000000000000000 which will be exact. NWC */
2105 SvUVX(sv) = U_V(SvNVX(sv));
2107 (SvNVX(sv) == (NV) SvUVX(sv))
2108 #ifndef NV_PRESERVES_UV
2109 /* Make sure it's not 0xFFFFFFFFFFFFFFFF */
2110 /*&& (SvUVX(sv) != UV_MAX) irrelevant with code below */
2111 && (((UV)1 << NV_PRESERVES_UV_BITS) > SvUVX(sv))
2112 /* Don't flag it as "accurately an integer" if the number
2113 came from a (by definition imprecise) NV operation, and
2114 we're outside the range of NV integer precision */
2120 DEBUG_c(PerlIO_printf(Perl_debug_log,
2121 "0x%"UVxf" 2iv(%"UVuf" => %"IVdf") (as unsigned)\n",
2125 return (IV)SvUVX(sv);
2128 else if (SvPOKp(sv) && SvLEN(sv)) {
2130 int numtype = grok_number(SvPVX(sv), SvCUR(sv), &value);
2131 /* We want to avoid a possible problem when we cache an IV which
2132 may be later translated to an NV, and the resulting NV is not
2133 the same as the direct translation of the initial string
2134 (eg 123.456 can shortcut to the IV 123 with atol(), but we must
2135 be careful to ensure that the value with the .456 is around if the
2136 NV value is requested in the future).
2138 This means that if we cache such an IV, we need to cache the
2139 NV as well. Moreover, we trade speed for space, and do not
2140 cache the NV if we are sure it's not needed.
2143 /* SVt_PVNV is one higher than SVt_PVIV, hence this order */
2144 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2145 == IS_NUMBER_IN_UV) {
2146 /* It's definitely an integer, only upgrade to PVIV */
2147 if (SvTYPE(sv) < SVt_PVIV)
2148 sv_upgrade(sv, SVt_PVIV);
2150 } else if (SvTYPE(sv) < SVt_PVNV)
2151 sv_upgrade(sv, SVt_PVNV);
2153 /* If NV preserves UV then we only use the UV value if we know that
2154 we aren't going to call atof() below. If NVs don't preserve UVs
2155 then the value returned may have more precision than atof() will
2156 return, even though value isn't perfectly accurate. */
2157 if ((numtype & (IS_NUMBER_IN_UV
2158 #ifdef NV_PRESERVES_UV
2161 )) == IS_NUMBER_IN_UV) {
2162 /* This won't turn off the public IOK flag if it was set above */
2163 (void)SvIOKp_on(sv);
2165 if (!(numtype & IS_NUMBER_NEG)) {
2167 if (value <= (UV)IV_MAX) {
2168 SvIVX(sv) = (IV)value;
2174 /* 2s complement assumption */
2175 if (value <= (UV)IV_MIN) {
2176 SvIVX(sv) = -(IV)value;
2178 /* Too negative for an IV. This is a double upgrade, but
2179 I'm assuming it will be rare. */
2180 if (SvTYPE(sv) < SVt_PVNV)
2181 sv_upgrade(sv, SVt_PVNV);
2185 SvNVX(sv) = -(NV)value;
2190 /* For !NV_PRESERVES_UV and IS_NUMBER_IN_UV and IS_NUMBER_NOT_INT we
2191 will be in the previous block to set the IV slot, and the next
2192 block to set the NV slot. So no else here. */
2194 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2195 != IS_NUMBER_IN_UV) {
2196 /* It wasn't an (integer that doesn't overflow the UV). */
2197 SvNVX(sv) = Atof(SvPVX(sv));
2199 if (! numtype && ckWARN(WARN_NUMERIC))
2202 #if defined(USE_LONG_DOUBLE)
2203 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2iv(%" PERL_PRIgldbl ")\n",
2204 PTR2UV(sv), SvNVX(sv)));
2206 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2iv(%"NVgf")\n",
2207 PTR2UV(sv), SvNVX(sv)));
2211 #ifdef NV_PRESERVES_UV
2212 (void)SvIOKp_on(sv);
2214 if (SvNVX(sv) < (NV)IV_MAX + 0.5) {
2215 SvIVX(sv) = I_V(SvNVX(sv));
2216 if ((NV)(SvIVX(sv)) == SvNVX(sv)) {
2219 /* Integer is imprecise. NOK, IOKp */
2221 /* UV will not work better than IV */
2223 if (SvNVX(sv) > (NV)UV_MAX) {
2225 /* Integer is inaccurate. NOK, IOKp, is UV */
2229 SvUVX(sv) = U_V(SvNVX(sv));
2230 /* 0xFFFFFFFFFFFFFFFF not an issue in here */
2231 if ((NV)(SvUVX(sv)) == SvNVX(sv)) {
2235 /* Integer is imprecise. NOK, IOKp, is UV */
2241 #else /* NV_PRESERVES_UV */
2242 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2243 == (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT)) {
2244 /* The IV slot will have been set from value returned by
2245 grok_number above. The NV slot has just been set using
2248 assert (SvIOKp(sv));
2250 if (((UV)1 << NV_PRESERVES_UV_BITS) >
2251 U_V(SvNVX(sv) > 0 ? SvNVX(sv) : -SvNVX(sv))) {
2252 /* Small enough to preserve all bits. */
2253 (void)SvIOKp_on(sv);
2255 SvIVX(sv) = I_V(SvNVX(sv));
2256 if ((NV)(SvIVX(sv)) == SvNVX(sv))
2258 /* Assumption: first non-preserved integer is < IV_MAX,
2259 this NV is in the preserved range, therefore: */
2260 if (!(U_V(SvNVX(sv) > 0 ? SvNVX(sv) : -SvNVX(sv))
2262 Perl_croak(aTHX_ "sv_2iv assumed (U_V(fabs(SvNVX(sv))) < (UV)IV_MAX) but SvNVX(sv)=%"NVgf" U_V is 0x%"UVxf", IV_MAX is 0x%"UVxf"\n", SvNVX(sv), U_V(SvNVX(sv)), (UV)IV_MAX);
2266 0 0 already failed to read UV.
2267 0 1 already failed to read UV.
2268 1 0 you won't get here in this case. IV/UV
2269 slot set, public IOK, Atof() unneeded.
2270 1 1 already read UV.
2271 so there's no point in sv_2iuv_non_preserve() attempting
2272 to use atol, strtol, strtoul etc. */
2273 if (sv_2iuv_non_preserve (sv, numtype)
2274 >= IS_NUMBER_OVERFLOW_IV)
2278 #endif /* NV_PRESERVES_UV */
2281 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP))
2283 if (SvTYPE(sv) < SVt_IV)
2284 /* Typically the caller expects that sv_any is not NULL now. */
2285 sv_upgrade(sv, SVt_IV);
2288 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2iv(%"IVdf")\n",
2289 PTR2UV(sv),SvIVX(sv)));
2290 return SvIsUV(sv) ? (IV)SvUVX(sv) : SvIVX(sv);
2296 Return the unsigned integer value of an SV, doing any necessary string
2297 conversion, magic etc. Normally used via the C<SvUV(sv)> and C<SvUVx(sv)>
2304 Perl_sv_2uv(pTHX_ register SV *sv)
2308 if (SvGMAGICAL(sv)) {
2313 return U_V(SvNVX(sv));
2314 if (SvPOKp(sv) && SvLEN(sv))
2317 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
2318 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
2324 if (SvTHINKFIRST(sv)) {
2327 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,numer)) &&
2328 (SvTYPE(tmpstr) != SVt_RV || (SvRV(tmpstr) != SvRV(sv))))
2329 return SvUV(tmpstr);
2330 return PTR2UV(SvRV(sv));
2332 if (SvREADONLY(sv) && SvFAKE(sv)) {
2333 sv_force_normal(sv);
2335 if (SvREADONLY(sv) && !SvOK(sv)) {
2336 if (ckWARN(WARN_UNINITIALIZED))
2346 return (UV)SvIVX(sv);
2350 /* erm. not sure. *should* never get NOKp (without NOK) from sv_2nv
2351 * without also getting a cached IV/UV from it at the same time
2352 * (ie PV->NV conversion should detect loss of accuracy and cache
2353 * IV or UV at same time to avoid this. */
2354 /* IV-over-UV optimisation - choose to cache IV if possible */
2356 if (SvTYPE(sv) == SVt_NV)
2357 sv_upgrade(sv, SVt_PVNV);
2359 (void)SvIOKp_on(sv); /* Must do this first, to clear any SvOOK */
2360 if (SvNVX(sv) < (NV)IV_MAX + 0.5) {
2361 SvIVX(sv) = I_V(SvNVX(sv));
2362 if (SvNVX(sv) == (NV) SvIVX(sv)
2363 #ifndef NV_PRESERVES_UV
2364 && (((UV)1 << NV_PRESERVES_UV_BITS) >
2365 (UV)(SvIVX(sv) > 0 ? SvIVX(sv) : -SvIVX(sv)))
2366 /* Don't flag it as "accurately an integer" if the number
2367 came from a (by definition imprecise) NV operation, and
2368 we're outside the range of NV integer precision */
2371 SvIOK_on(sv); /* Can this go wrong with rounding? NWC */
2372 DEBUG_c(PerlIO_printf(Perl_debug_log,
2373 "0x%"UVxf" uv(%"NVgf" => %"IVdf") (precise)\n",
2379 /* IV not precise. No need to convert from PV, as NV
2380 conversion would already have cached IV if it detected
2381 that PV->IV would be better than PV->NV->IV
2382 flags already correct - don't set public IOK. */
2383 DEBUG_c(PerlIO_printf(Perl_debug_log,
2384 "0x%"UVxf" uv(%"NVgf" => %"IVdf") (imprecise)\n",
2389 /* Can the above go wrong if SvIVX == IV_MIN and SvNVX < IV_MIN,
2390 but the cast (NV)IV_MIN rounds to a the value less (more
2391 negative) than IV_MIN which happens to be equal to SvNVX ??
2392 Analogous to 0xFFFFFFFFFFFFFFFF rounding up to NV (2**64) and
2393 NV rounding back to 0xFFFFFFFFFFFFFFFF, so UVX == UV(NVX) and
2394 (NV)UVX == NVX are both true, but the values differ. :-(
2395 Hopefully for 2s complement IV_MIN is something like
2396 0x8000000000000000 which will be exact. NWC */
2399 SvUVX(sv) = U_V(SvNVX(sv));
2401 (SvNVX(sv) == (NV) SvUVX(sv))
2402 #ifndef NV_PRESERVES_UV
2403 /* Make sure it's not 0xFFFFFFFFFFFFFFFF */
2404 /*&& (SvUVX(sv) != UV_MAX) irrelevant with code below */
2405 && (((UV)1 << NV_PRESERVES_UV_BITS) > SvUVX(sv))
2406 /* Don't flag it as "accurately an integer" if the number
2407 came from a (by definition imprecise) NV operation, and
2408 we're outside the range of NV integer precision */
2413 DEBUG_c(PerlIO_printf(Perl_debug_log,
2414 "0x%"UVxf" 2uv(%"UVuf" => %"IVdf") (as unsigned)\n",
2420 else if (SvPOKp(sv) && SvLEN(sv)) {
2422 int numtype = grok_number(SvPVX(sv), SvCUR(sv), &value);
2424 /* We want to avoid a possible problem when we cache a UV which
2425 may be later translated to an NV, and the resulting NV is not
2426 the translation of the initial data.
2428 This means that if we cache such a UV, we need to cache the
2429 NV as well. Moreover, we trade speed for space, and do not
2430 cache the NV if not needed.
2433 /* SVt_PVNV is one higher than SVt_PVIV, hence this order */
2434 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2435 == IS_NUMBER_IN_UV) {
2436 /* It's definitely an integer, only upgrade to PVIV */
2437 if (SvTYPE(sv) < SVt_PVIV)
2438 sv_upgrade(sv, SVt_PVIV);
2440 } else if (SvTYPE(sv) < SVt_PVNV)
2441 sv_upgrade(sv, SVt_PVNV);
2443 /* If NV preserves UV then we only use the UV value if we know that
2444 we aren't going to call atof() below. If NVs don't preserve UVs
2445 then the value returned may have more precision than atof() will
2446 return, even though it isn't accurate. */
2447 if ((numtype & (IS_NUMBER_IN_UV
2448 #ifdef NV_PRESERVES_UV
2451 )) == IS_NUMBER_IN_UV) {
2452 /* This won't turn off the public IOK flag if it was set above */
2453 (void)SvIOKp_on(sv);
2455 if (!(numtype & IS_NUMBER_NEG)) {
2457 if (value <= (UV)IV_MAX) {
2458 SvIVX(sv) = (IV)value;
2460 /* it didn't overflow, and it was positive. */
2465 /* 2s complement assumption */
2466 if (value <= (UV)IV_MIN) {
2467 SvIVX(sv) = -(IV)value;
2469 /* Too negative for an IV. This is a double upgrade, but
2470 I'm assuming it will be rare. */
2471 if (SvTYPE(sv) < SVt_PVNV)
2472 sv_upgrade(sv, SVt_PVNV);
2476 SvNVX(sv) = -(NV)value;
2482 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2483 != IS_NUMBER_IN_UV) {
2484 /* It wasn't an integer, or it overflowed the UV. */
2485 SvNVX(sv) = Atof(SvPVX(sv));
2487 if (! numtype && ckWARN(WARN_NUMERIC))
2490 #if defined(USE_LONG_DOUBLE)
2491 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2uv(%" PERL_PRIgldbl ")\n",
2492 PTR2UV(sv), SvNVX(sv)));
2494 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2uv(%"NVgf")\n",
2495 PTR2UV(sv), SvNVX(sv)));
2498 #ifdef NV_PRESERVES_UV
2499 (void)SvIOKp_on(sv);
2501 if (SvNVX(sv) < (NV)IV_MAX + 0.5) {
2502 SvIVX(sv) = I_V(SvNVX(sv));
2503 if ((NV)(SvIVX(sv)) == SvNVX(sv)) {
2506 /* Integer is imprecise. NOK, IOKp */
2508 /* UV will not work better than IV */
2510 if (SvNVX(sv) > (NV)UV_MAX) {
2512 /* Integer is inaccurate. NOK, IOKp, is UV */
2516 SvUVX(sv) = U_V(SvNVX(sv));
2517 /* 0xFFFFFFFFFFFFFFFF not an issue in here, NVs
2518 NV preservse UV so can do correct comparison. */
2519 if ((NV)(SvUVX(sv)) == SvNVX(sv)) {
2523 /* Integer is imprecise. NOK, IOKp, is UV */
2528 #else /* NV_PRESERVES_UV */
2529 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2530 == (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT)) {
2531 /* The UV slot will have been set from value returned by
2532 grok_number above. The NV slot has just been set using
2535 assert (SvIOKp(sv));
2537 if (((UV)1 << NV_PRESERVES_UV_BITS) >
2538 U_V(SvNVX(sv) > 0 ? SvNVX(sv) : -SvNVX(sv))) {
2539 /* Small enough to preserve all bits. */
2540 (void)SvIOKp_on(sv);
2542 SvIVX(sv) = I_V(SvNVX(sv));
2543 if ((NV)(SvIVX(sv)) == SvNVX(sv))
2545 /* Assumption: first non-preserved integer is < IV_MAX,
2546 this NV is in the preserved range, therefore: */
2547 if (!(U_V(SvNVX(sv) > 0 ? SvNVX(sv) : -SvNVX(sv))
2549 Perl_croak(aTHX_ "sv_2uv assumed (U_V(fabs(SvNVX(sv))) < (UV)IV_MAX) but SvNVX(sv)=%"NVgf" U_V is 0x%"UVxf", IV_MAX is 0x%"UVxf"\n", SvNVX(sv), U_V(SvNVX(sv)), (UV)IV_MAX);
2552 sv_2iuv_non_preserve (sv, numtype);
2554 #endif /* NV_PRESERVES_UV */
2558 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
2559 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
2562 if (SvTYPE(sv) < SVt_IV)
2563 /* Typically the caller expects that sv_any is not NULL now. */
2564 sv_upgrade(sv, SVt_IV);
2568 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2uv(%"UVuf")\n",
2569 PTR2UV(sv),SvUVX(sv)));
2570 return SvIsUV(sv) ? SvUVX(sv) : (UV)SvIVX(sv);
2576 Return the num value of an SV, doing any necessary string or integer
2577 conversion, magic etc. Normally used via the C<SvNV(sv)> and C<SvNVx(sv)>
2584 Perl_sv_2nv(pTHX_ register SV *sv)
2588 if (SvGMAGICAL(sv)) {
2592 if (SvPOKp(sv) && SvLEN(sv)) {
2593 if (ckWARN(WARN_NUMERIC) && !SvIOKp(sv) &&
2594 !grok_number(SvPVX(sv), SvCUR(sv), NULL))
2596 return Atof(SvPVX(sv));
2600 return (NV)SvUVX(sv);
2602 return (NV)SvIVX(sv);
2605 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
2606 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
2612 if (SvTHINKFIRST(sv)) {
2615 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,numer)) &&
2616 (SvTYPE(tmpstr) != SVt_RV || (SvRV(tmpstr) != SvRV(sv))))
2617 return SvNV(tmpstr);
2618 return PTR2NV(SvRV(sv));
2620 if (SvREADONLY(sv) && SvFAKE(sv)) {
2621 sv_force_normal(sv);
2623 if (SvREADONLY(sv) && !SvOK(sv)) {
2624 if (ckWARN(WARN_UNINITIALIZED))
2629 if (SvTYPE(sv) < SVt_NV) {
2630 if (SvTYPE(sv) == SVt_IV)
2631 sv_upgrade(sv, SVt_PVNV);
2633 sv_upgrade(sv, SVt_NV);
2634 #ifdef USE_LONG_DOUBLE
2636 STORE_NUMERIC_LOCAL_SET_STANDARD();
2637 PerlIO_printf(Perl_debug_log,
2638 "0x%"UVxf" num(%" PERL_PRIgldbl ")\n",
2639 PTR2UV(sv), SvNVX(sv));
2640 RESTORE_NUMERIC_LOCAL();
2644 STORE_NUMERIC_LOCAL_SET_STANDARD();
2645 PerlIO_printf(Perl_debug_log, "0x%"UVxf" num(%"NVgf")\n",
2646 PTR2UV(sv), SvNVX(sv));
2647 RESTORE_NUMERIC_LOCAL();
2651 else if (SvTYPE(sv) < SVt_PVNV)
2652 sv_upgrade(sv, SVt_PVNV);
2657 SvNVX(sv) = SvIsUV(sv) ? (NV)SvUVX(sv) : (NV)SvIVX(sv);
2658 #ifdef NV_PRESERVES_UV
2661 /* Only set the public NV OK flag if this NV preserves the IV */
2662 /* Check it's not 0xFFFFFFFFFFFFFFFF */
2663 if (SvIsUV(sv) ? ((SvUVX(sv) != UV_MAX)&&(SvUVX(sv) == U_V(SvNVX(sv))))
2664 : (SvIVX(sv) == I_V(SvNVX(sv))))
2670 else if (SvPOKp(sv) && SvLEN(sv)) {
2672 int numtype = grok_number(SvPVX(sv), SvCUR(sv), &value);
2673 if (ckWARN(WARN_NUMERIC) && !SvIOKp(sv) && !numtype)
2675 #ifdef NV_PRESERVES_UV
2676 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2677 == IS_NUMBER_IN_UV) {
2678 /* It's definitely an integer */
2679 SvNVX(sv) = (numtype & IS_NUMBER_NEG) ? -(NV)value : (NV)value;
2681 SvNVX(sv) = Atof(SvPVX(sv));
2684 SvNVX(sv) = Atof(SvPVX(sv));
2685 /* Only set the public NV OK flag if this NV preserves the value in
2686 the PV at least as well as an IV/UV would.
2687 Not sure how to do this 100% reliably. */
2688 /* if that shift count is out of range then Configure's test is
2689 wonky. We shouldn't be in here with NV_PRESERVES_UV_BITS ==
2691 if (((UV)1 << NV_PRESERVES_UV_BITS) >
2692 U_V(SvNVX(sv) > 0 ? SvNVX(sv) : -SvNVX(sv))) {
2693 SvNOK_on(sv); /* Definitely small enough to preserve all bits */
2694 } else if (!(numtype & IS_NUMBER_IN_UV)) {
2695 /* Can't use strtol etc to convert this string, so don't try.
2696 sv_2iv and sv_2uv will use the NV to convert, not the PV. */
2699 /* value has been set. It may not be precise. */
2700 if ((numtype & IS_NUMBER_NEG) && (value > (UV)IV_MIN)) {
2701 /* 2s complement assumption for (UV)IV_MIN */
2702 SvNOK_on(sv); /* Integer is too negative. */
2707 if (numtype & IS_NUMBER_NEG) {
2708 SvIVX(sv) = -(IV)value;
2709 } else if (value <= (UV)IV_MAX) {
2710 SvIVX(sv) = (IV)value;
2716 if (numtype & IS_NUMBER_NOT_INT) {
2717 /* I believe that even if the original PV had decimals,
2718 they are lost beyond the limit of the FP precision.
2719 However, neither is canonical, so both only get p
2720 flags. NWC, 2000/11/25 */
2721 /* Both already have p flags, so do nothing */
2724 if (SvNVX(sv) < (NV)IV_MAX + 0.5) {
2725 if (SvIVX(sv) == I_V(nv)) {
2730 /* It had no "." so it must be integer. */
2733 /* between IV_MAX and NV(UV_MAX).
2734 Could be slightly > UV_MAX */
2736 if (numtype & IS_NUMBER_NOT_INT) {
2737 /* UV and NV both imprecise. */
2739 UV nv_as_uv = U_V(nv);
2741 if (value == nv_as_uv && SvUVX(sv) != UV_MAX) {
2752 #endif /* NV_PRESERVES_UV */
2755 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP))
2757 if (SvTYPE(sv) < SVt_NV)
2758 /* Typically the caller expects that sv_any is not NULL now. */
2759 /* XXX Ilya implies that this is a bug in callers that assume this
2760 and ideally should be fixed. */
2761 sv_upgrade(sv, SVt_NV);
2764 #if defined(USE_LONG_DOUBLE)
2766 STORE_NUMERIC_LOCAL_SET_STANDARD();
2767 PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2nv(%" PERL_PRIgldbl ")\n",
2768 PTR2UV(sv), SvNVX(sv));
2769 RESTORE_NUMERIC_LOCAL();
2773 STORE_NUMERIC_LOCAL_SET_STANDARD();
2774 PerlIO_printf(Perl_debug_log, "0x%"UVxf" 1nv(%"NVgf")\n",
2775 PTR2UV(sv), SvNVX(sv));
2776 RESTORE_NUMERIC_LOCAL();
2782 /* asIV(): extract an integer from the string value of an SV.
2783 * Caller must validate PVX */
2786 S_asIV(pTHX_ SV *sv)
2789 int numtype = grok_number(SvPVX(sv), SvCUR(sv), &value);
2791 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2792 == IS_NUMBER_IN_UV) {
2793 /* It's definitely an integer */
2794 if (numtype & IS_NUMBER_NEG) {
2795 if (value < (UV)IV_MIN)
2798 if (value < (UV)IV_MAX)
2803 if (ckWARN(WARN_NUMERIC))
2806 return I_V(Atof(SvPVX(sv)));
2809 /* asUV(): extract an unsigned integer from the string value of an SV
2810 * Caller must validate PVX */
2813 S_asUV(pTHX_ SV *sv)
2816 int numtype = grok_number(SvPVX(sv), SvCUR(sv), &value);
2818 if ((numtype & (IS_NUMBER_IN_UV | IS_NUMBER_NOT_INT))
2819 == IS_NUMBER_IN_UV) {
2820 /* It's definitely an integer */
2821 if (!(numtype & IS_NUMBER_NEG))
2825 if (ckWARN(WARN_NUMERIC))
2828 return U_V(Atof(SvPVX(sv)));
2832 =for apidoc sv_2pv_nolen
2834 Like C<sv_2pv()>, but doesn't return the length too. You should usually
2835 use the macro wrapper C<SvPV_nolen(sv)> instead.
2840 Perl_sv_2pv_nolen(pTHX_ register SV *sv)
2843 return sv_2pv(sv, &n_a);
2846 /* uiv_2buf(): private routine for use by sv_2pv_flags(): print an IV or
2847 * UV as a string towards the end of buf, and return pointers to start and
2850 * We assume that buf is at least TYPE_CHARS(UV) long.
2854 uiv_2buf(char *buf, IV iv, UV uv, int is_uv, char **peob)
2856 char *ptr = buf + TYPE_CHARS(UV);
2870 *--ptr = '0' + (char)(uv % 10);
2879 =for apidoc sv_2pv_flags
2881 Returns a pointer to the string value of an SV, and sets *lp to its length.
2882 If flags includes SV_GMAGIC, does an mg_get() first. Coerces sv to a string
2884 Normally invoked via the C<SvPV_flags> macro. C<sv_2pv()> and C<sv_2pv_nomg>
2885 usually end up here too.
2891 Perl_sv_2pv_flags(pTHX_ register SV *sv, STRLEN *lp, I32 flags)
2896 char tbuf[64]; /* Must fit sprintf/Gconvert of longest IV/NV */
2897 char *tmpbuf = tbuf;
2903 if (SvGMAGICAL(sv)) {
2904 if (flags & SV_GMAGIC)
2912 (void)sprintf(tmpbuf,"%"UVuf, (UV)SvUVX(sv));
2914 (void)sprintf(tmpbuf,"%"IVdf, (IV)SvIVX(sv));
2919 Gconvert(SvNVX(sv), NV_DIG, 0, tmpbuf);
2924 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
2925 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
2932 if (SvTHINKFIRST(sv)) {
2935 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,string)) &&
2936 (SvTYPE(tmpstr) != SVt_RV || (SvRV(tmpstr) != SvRV(sv))))
2937 return SvPV(tmpstr,*lp);
2944 switch (SvTYPE(sv)) {
2946 if ( ((SvFLAGS(sv) &
2947 (SVs_OBJECT|SVf_OK|SVs_GMG|SVs_SMG|SVs_RMG))
2948 == (SVs_OBJECT|SVs_RMG))
2949 && strEQ(s=HvNAME(SvSTASH(sv)), "Regexp")
2950 && (mg = mg_find(sv, PERL_MAGIC_qr))) {
2951 regexp *re = (regexp *)mg->mg_obj;
2954 char *fptr = "msix";
2959 char need_newline = 0;
2960 U16 reganch = (U16)((re->reganch & PMf_COMPILETIME) >> 12);
2962 while((ch = *fptr++)) {
2964 reflags[left++] = ch;
2967 reflags[right--] = ch;
2972 reflags[left] = '-';
2976 mg->mg_len = re->prelen + 4 + left;
2978 * If /x was used, we have to worry about a regex
2979 * ending with a comment later being embedded
2980 * within another regex. If so, we don't want this
2981 * regex's "commentization" to leak out to the
2982 * right part of the enclosing regex, we must cap
2983 * it with a newline.
2985 * So, if /x was used, we scan backwards from the
2986 * end of the regex. If we find a '#' before we
2987 * find a newline, we need to add a newline
2988 * ourself. If we find a '\n' first (or if we
2989 * don't find '#' or '\n'), we don't need to add
2990 * anything. -jfriedl
2992 if (PMf_EXTENDED & re->reganch)
2994 char *endptr = re->precomp + re->prelen;
2995 while (endptr >= re->precomp)
2997 char c = *(endptr--);
2999 break; /* don't need another */
3001 /* we end while in a comment, so we
3003 mg->mg_len++; /* save space for it */
3004 need_newline = 1; /* note to add it */
3009 New(616, mg->mg_ptr, mg->mg_len + 1 + left, char);
3010 Copy("(?", mg->mg_ptr, 2, char);
3011 Copy(reflags, mg->mg_ptr+2, left, char);
3012 Copy(":", mg->mg_ptr+left+2, 1, char);
3013 Copy(re->precomp, mg->mg_ptr+3+left, re->prelen, char);
3015 mg->mg_ptr[mg->mg_len - 2] = '\n';
3016 mg->mg_ptr[mg->mg_len - 1] = ')';
3017 mg->mg_ptr[mg->mg_len] = 0;
3019 PL_reginterp_cnt += re->program[0].next_off;
3031 case SVt_PVBM: if (SvROK(sv))
3034 s = "SCALAR"; break;
3035 case SVt_PVLV: s = "LVALUE"; break;
3036 case SVt_PVAV: s = "ARRAY"; break;
3037 case SVt_PVHV: s = "HASH"; break;
3038 case SVt_PVCV: s = "CODE"; break;
3039 case SVt_PVGV: s = "GLOB"; break;
3040 case SVt_PVFM: s = "FORMAT"; break;
3041 case SVt_PVIO: s = "IO"; break;
3042 default: s = "UNKNOWN"; break;
3046 HV *svs = SvSTASH(sv);
3049 /* [20011101.072] This bandaid for C<package;>
3050 should eventually be removed. AMS 20011103 */
3051 (svs ? HvNAME(svs) : "<none>"), s
3056 Perl_sv_catpvf(aTHX_ tsv, "(0x%"UVxf")", PTR2UV(sv));
3062 if (SvREADONLY(sv) && !SvOK(sv)) {
3063 if (ckWARN(WARN_UNINITIALIZED))
3069 if (SvIOK(sv) || ((SvIOKp(sv) && !SvNOKp(sv)))) {
3070 /* I'm assuming that if both IV and NV are equally valid then
3071 converting the IV is going to be more efficient */
3072 U32 isIOK = SvIOK(sv);
3073 U32 isUIOK = SvIsUV(sv);
3074 char buf[TYPE_CHARS(UV)];
3077 if (SvTYPE(sv) < SVt_PVIV)
3078 sv_upgrade(sv, SVt_PVIV);
3080 ptr = uiv_2buf(buf, 0, SvUVX(sv), 1, &ebuf);
3082 ptr = uiv_2buf(buf, SvIVX(sv), 0, 0, &ebuf);
3083 SvGROW(sv, (STRLEN)(ebuf - ptr + 1)); /* inlined from sv_setpvn */
3084 Move(ptr,SvPVX(sv),ebuf - ptr,char);
3085 SvCUR_set(sv, ebuf - ptr);
3095 else if (SvNOKp(sv)) {
3096 if (SvTYPE(sv) < SVt_PVNV)
3097 sv_upgrade(sv, SVt_PVNV);
3098 /* The +20 is pure guesswork. Configure test needed. --jhi */
3099 SvGROW(sv, NV_DIG + 20);
3101 olderrno = errno; /* some Xenix systems wipe out errno here */
3103 if (SvNVX(sv) == 0.0)
3104 (void)strcpy(s,"0");
3108 Gconvert(SvNVX(sv), NV_DIG, 0, s);
3111 #ifdef FIXNEGATIVEZERO
3112 if (*s == '-' && s[1] == '0' && !s[2])
3122 if (ckWARN(WARN_UNINITIALIZED)
3123 && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP))
3126 if (SvTYPE(sv) < SVt_PV)
3127 /* Typically the caller expects that sv_any is not NULL now. */
3128 sv_upgrade(sv, SVt_PV);
3131 *lp = s - SvPVX(sv);
3134 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2pv(%s)\n",
3135 PTR2UV(sv),SvPVX(sv)));
3139 if (SvROK(sv)) { /* XXX Skip this when sv_pvn_force calls */
3140 /* Sneaky stuff here */
3144 tsv = newSVpv(tmpbuf, 0);
3160 len = strlen(tmpbuf);
3162 #ifdef FIXNEGATIVEZERO
3163 if (len == 2 && t[0] == '-' && t[1] == '0') {
3168 (void)SvUPGRADE(sv, SVt_PV);
3170 s = SvGROW(sv, len + 1);
3179 =for apidoc sv_copypv
3181 Copies a stringified representation of the source SV into the
3182 destination SV. Automatically performs any necessary mg_get and
3183 coercion of numeric values into strings. Guaranteed to preserve
3184 UTF-8 flag even from overloaded objects. Similar in nature to
3185 sv_2pv[_flags] but operates directly on an SV instead of just the
3186 string. Mostly uses sv_2pv_flags to do its work, except when that
3187 would lose the UTF-8'ness of the PV.
3193 Perl_sv_copypv(pTHX_ SV *dsv, register SV *ssv)
3195 SV *tmpsv = sv_newmortal();
3197 if ( SvTHINKFIRST(ssv) && SvROK(ssv) && SvAMAGIC(ssv) ) {
3198 tmpsv = AMG_CALLun(ssv,string);
3199 if (SvTYPE(tmpsv) != SVt_RV || (SvRV(tmpsv) != SvRV(ssv))) {
3208 sv_setpvn(tmpsv,s,len);
3218 =for apidoc sv_2pvbyte_nolen
3220 Return a pointer to the byte-encoded representation of the SV.
3221 May cause the SV to be downgraded from UTF8 as a side-effect.
3223 Usually accessed via the C<SvPVbyte_nolen> macro.
3229 Perl_sv_2pvbyte_nolen(pTHX_ register SV *sv)
3232 return sv_2pvbyte(sv, &n_a);
3236 =for apidoc sv_2pvbyte
3238 Return a pointer to the byte-encoded representation of the SV, and set *lp
3239 to its length. May cause the SV to be downgraded from UTF8 as a
3242 Usually accessed via the C<SvPVbyte> macro.
3248 Perl_sv_2pvbyte(pTHX_ register SV *sv, STRLEN *lp)
3250 sv_utf8_downgrade(sv,0);
3251 return SvPV(sv,*lp);
3255 =for apidoc sv_2pvutf8_nolen
3257 Return a pointer to the UTF8-encoded representation of the SV.
3258 May cause the SV to be upgraded to UTF8 as a side-effect.
3260 Usually accessed via the C<SvPVutf8_nolen> macro.
3266 Perl_sv_2pvutf8_nolen(pTHX_ register SV *sv)
3269 return sv_2pvutf8(sv, &n_a);
3273 =for apidoc sv_2pvutf8
3275 Return a pointer to the UTF8-encoded representation of the SV, and set *lp
3276 to its length. May cause the SV to be upgraded to UTF8 as a side-effect.
3278 Usually accessed via the C<SvPVutf8> macro.
3284 Perl_sv_2pvutf8(pTHX_ register SV *sv, STRLEN *lp)
3286 sv_utf8_upgrade(sv);
3287 return SvPV(sv,*lp);
3291 =for apidoc sv_2bool
3293 This function is only called on magical items, and is only used by
3294 sv_true() or its macro equivalent.
3300 Perl_sv_2bool(pTHX_ register SV *sv)
3309 if (SvAMAGIC(sv) && (tmpsv=AMG_CALLun(sv,bool_)) &&
3310 (!SvROK(tmpsv) || (SvRV(tmpsv) != SvRV(sv))))
3311 return (bool)SvTRUE(tmpsv);
3312 return SvRV(sv) != 0;
3315 register XPV* Xpvtmp;
3316 if ((Xpvtmp = (XPV*)SvANY(sv)) &&
3317 (*Xpvtmp->xpv_pv > '0' ||
3318 Xpvtmp->xpv_cur > 1 ||
3319 (Xpvtmp->xpv_cur && *Xpvtmp->xpv_pv != '0')))
3326 return SvIVX(sv) != 0;
3329 return SvNVX(sv) != 0.0;
3337 =for apidoc sv_utf8_upgrade
3339 Convert the PV of an SV to its UTF8-encoded form.
3340 Forces the SV to string form if it is not already.
3341 Always sets the SvUTF8 flag to avoid future validity checks even
3342 if all the bytes have hibit clear.
3344 This is not as a general purpose byte encoding to Unicode interface:
3345 use the Encode extension for that.
3347 =for apidoc sv_utf8_upgrade_flags
3349 Convert the PV of an SV to its UTF8-encoded form.
3350 Forces the SV to string form if it is not already.
3351 Always sets the SvUTF8 flag to avoid future validity checks even
3352 if all the bytes have hibit clear. If C<flags> has C<SV_GMAGIC> bit set,
3353 will C<mg_get> on C<sv> if appropriate, else not. C<sv_utf8_upgrade> and
3354 C<sv_utf8_upgrade_nomg> are implemented in terms of this function.
3356 This is not as a general purpose byte encoding to Unicode interface:
3357 use the Encode extension for that.
3363 Perl_sv_utf8_upgrade_flags(pTHX_ register SV *sv, I32 flags)
3373 (void) sv_2pv_flags(sv,&len, flags);
3381 if (SvREADONLY(sv) && SvFAKE(sv)) {
3382 sv_force_normal(sv);
3386 sv_recode_to_utf8(sv, PL_encoding);
3387 else { /* Assume Latin-1/EBCDIC */
3388 /* This function could be much more efficient if we
3389 * had a FLAG in SVs to signal if there are any hibit
3390 * chars in the PV. Given that there isn't such a flag
3391 * make the loop as fast as possible. */
3392 s = (U8 *) SvPVX(sv);
3393 e = (U8 *) SvEND(sv);
3397 if ((hibit = !NATIVE_IS_INVARIANT(ch)))
3403 len = SvCUR(sv) + 1; /* Plus the \0 */
3404 SvPVX(sv) = (char*)bytes_to_utf8((U8*)s, &len);
3405 SvCUR(sv) = len - 1;
3407 Safefree(s); /* No longer using what was there before. */
3408 SvLEN(sv) = len; /* No longer know the real size. */
3410 /* Mark as UTF-8 even if no hibit - saves scanning loop */
3417 =for apidoc sv_utf8_downgrade
3419 Attempt to convert the PV of an SV from UTF8-encoded to byte encoding.
3420 This may not be possible if the PV contains non-byte encoding characters;
3421 if this is the case, either returns false or, if C<fail_ok> is not
3424 This is not as a general purpose Unicode to byte encoding interface:
3425 use the Encode extension for that.
3431 Perl_sv_utf8_downgrade(pTHX_ register SV* sv, bool fail_ok)
3433 if (SvPOK(sv) && SvUTF8(sv)) {
3438 if (SvREADONLY(sv) && SvFAKE(sv))
3439 sv_force_normal(sv);
3440 s = (U8 *) SvPV(sv, len);
3441 if (!utf8_to_bytes(s, &len)) {
3446 Perl_croak(aTHX_ "Wide character in %s",
3449 Perl_croak(aTHX_ "Wide character");
3460 =for apidoc sv_utf8_encode
3462 Convert the PV of an SV to UTF8-encoded, but then turn off the C<SvUTF8>
3463 flag so that it looks like octets again. Used as a building block
3464 for encode_utf8 in Encode.xs
3470 Perl_sv_utf8_encode(pTHX_ register SV *sv)
3472 (void) sv_utf8_upgrade(sv);
3477 =for apidoc sv_utf8_decode
3479 Convert the octets in the PV from UTF-8 to chars. Scan for validity and then
3480 turn off SvUTF8 if needed so that we see characters. Used as a building block
3481 for decode_utf8 in Encode.xs
3487 Perl_sv_utf8_decode(pTHX_ register SV *sv)
3493 /* The octets may have got themselves encoded - get them back as
3496 if (!sv_utf8_downgrade(sv, TRUE))
3499 /* it is actually just a matter of turning the utf8 flag on, but
3500 * we want to make sure everything inside is valid utf8 first.
3502 c = (U8 *) SvPVX(sv);
3503 if (!is_utf8_string(c, SvCUR(sv)+1))
3505 e = (U8 *) SvEND(sv);
3508 if (!UTF8_IS_INVARIANT(ch)) {
3518 =for apidoc sv_setsv
3520 Copies the contents of the source SV C<ssv> into the destination SV
3521 C<dsv>. The source SV may be destroyed if it is mortal, so don't use this
3522 function if the source SV needs to be reused. Does not handle 'set' magic.
3523 Loosely speaking, it performs a copy-by-value, obliterating any previous
3524 content of the destination.
3526 You probably want to use one of the assortment of wrappers, such as
3527 C<SvSetSV>, C<SvSetSV_nosteal>, C<SvSetMagicSV> and
3528 C<SvSetMagicSV_nosteal>.
3530 =for apidoc sv_setsv_flags
3532 Copies the contents of the source SV C<ssv> into the destination SV
3533 C<dsv>. The source SV may be destroyed if it is mortal, so don't use this
3534 function if the source SV needs to be reused. Does not handle 'set' magic.
3535 Loosely speaking, it performs a copy-by-value, obliterating any previous
3536 content of the destination.
3537 If the C<flags> parameter has the C<SV_GMAGIC> bit set, will C<mg_get> on
3538 C<ssv> if appropriate, else not. C<sv_setsv> and C<sv_setsv_nomg> are
3539 implemented in terms of this function.
3541 You probably want to use one of the assortment of wrappers, such as
3542 C<SvSetSV>, C<SvSetSV_nosteal>, C<SvSetMagicSV> and
3543 C<SvSetMagicSV_nosteal>.
3545 This is the primary function for copying scalars, and most other
3546 copy-ish functions and macros use this underneath.
3552 Perl_sv_setsv_flags(pTHX_ SV *dstr, register SV *sstr, I32 flags)
3554 register U32 sflags;
3560 SV_CHECK_THINKFIRST(dstr);
3562 sstr = &PL_sv_undef;
3563 stype = SvTYPE(sstr);
3564 dtype = SvTYPE(dstr);
3568 /* There's a lot of redundancy below but we're going for speed here */
3573 if (dtype != SVt_PVGV) {
3574 (void)SvOK_off(dstr);
3582 sv_upgrade(dstr, SVt_IV);
3585 sv_upgrade(dstr, SVt_PVNV);
3589 sv_upgrade(dstr, SVt_PVIV);
3592 (void)SvIOK_only(dstr);
3593 SvIVX(dstr) = SvIVX(sstr);
3596 if (SvTAINTED(sstr))
3607 sv_upgrade(dstr, SVt_NV);
3612 sv_upgrade(dstr, SVt_PVNV);
3615 SvNVX(dstr) = SvNVX(sstr);
3616 (void)SvNOK_only(dstr);
3617 if (SvTAINTED(sstr))
3625 sv_upgrade(dstr, SVt_RV);
3626 else if (dtype == SVt_PVGV &&
3627 SvTYPE(SvRV(sstr)) == SVt_PVGV) {
3630 if (GvIMPORTED(dstr) != GVf_IMPORTED
3631 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3633 GvIMPORTED_on(dstr);
3644 sv_upgrade(dstr, SVt_PV);
3647 if (dtype < SVt_PVIV)
3648 sv_upgrade(dstr, SVt_PVIV);
3651 if (dtype < SVt_PVNV)
3652 sv_upgrade(dstr, SVt_PVNV);
3659 Perl_croak(aTHX_ "Bizarre copy of %s in %s", sv_reftype(sstr, 0),
3662 Perl_croak(aTHX_ "Bizarre copy of %s", sv_reftype(sstr, 0));
3666 if (dtype <= SVt_PVGV) {
3668 if (dtype != SVt_PVGV) {
3669 char *name = GvNAME(sstr);
3670 STRLEN len = GvNAMELEN(sstr);
3671 sv_upgrade(dstr, SVt_PVGV);
3672 sv_magic(dstr, dstr, PERL_MAGIC_glob, Nullch, 0);
3673 GvSTASH(dstr) = (HV*)SvREFCNT_inc(GvSTASH(sstr));
3674 GvNAME(dstr) = savepvn(name, len);
3675 GvNAMELEN(dstr) = len;
3676 SvFAKE_on(dstr); /* can coerce to non-glob */
3678 /* ahem, death to those who redefine active sort subs */
3679 else if (PL_curstackinfo->si_type == PERLSI_SORT
3680 && GvCV(dstr) && PL_sortcop == CvSTART(GvCV(dstr)))
3681 Perl_croak(aTHX_ "Can't redefine active sort subroutine %s",
3684 #ifdef GV_UNIQUE_CHECK
3685 if (GvUNIQUE((GV*)dstr)) {
3686 Perl_croak(aTHX_ PL_no_modify);
3690 (void)SvOK_off(dstr);
3691 GvINTRO_off(dstr); /* one-shot flag */
3693 GvGP(dstr) = gp_ref(GvGP(sstr));
3694 if (SvTAINTED(sstr))
3696 if (GvIMPORTED(dstr) != GVf_IMPORTED
3697 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3699 GvIMPORTED_on(dstr);
3707 if (SvGMAGICAL(sstr) && (flags & SV_GMAGIC)) {
3709 if ((int)SvTYPE(sstr) != stype) {
3710 stype = SvTYPE(sstr);
3711 if (stype == SVt_PVGV && dtype <= SVt_PVGV)
3715 if (stype == SVt_PVLV)
3716 (void)SvUPGRADE(dstr, SVt_PVNV);
3718 (void)SvUPGRADE(dstr, (U32)stype);
3721 sflags = SvFLAGS(sstr);
3723 if (sflags & SVf_ROK) {
3724 if (dtype >= SVt_PV) {
3725 if (dtype == SVt_PVGV) {
3726 SV *sref = SvREFCNT_inc(SvRV(sstr));
3728 int intro = GvINTRO(dstr);
3730 #ifdef GV_UNIQUE_CHECK
3731 if (GvUNIQUE((GV*)dstr)) {
3732 Perl_croak(aTHX_ PL_no_modify);
3737 GvINTRO_off(dstr); /* one-shot flag */
3738 GvLINE(dstr) = CopLINE(PL_curcop);
3739 GvEGV(dstr) = (GV*)dstr;
3742 switch (SvTYPE(sref)) {
3745 SAVESPTR(GvAV(dstr));
3747 dref = (SV*)GvAV(dstr);
3748 GvAV(dstr) = (AV*)sref;
3749 if (!GvIMPORTED_AV(dstr)
3750 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3752 GvIMPORTED_AV_on(dstr);
3757 SAVESPTR(GvHV(dstr));
3759 dref = (SV*)GvHV(dstr);
3760 GvHV(dstr) = (HV*)sref;
3761 if (!GvIMPORTED_HV(dstr)
3762 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3764 GvIMPORTED_HV_on(dstr);
3769 if (GvCVGEN(dstr) && GvCV(dstr) != (CV*)sref) {
3770 SvREFCNT_dec(GvCV(dstr));
3771 GvCV(dstr) = Nullcv;
3772 GvCVGEN(dstr) = 0; /* Switch off cacheness. */
3773 PL_sub_generation++;
3775 SAVESPTR(GvCV(dstr));
3778 dref = (SV*)GvCV(dstr);
3779 if (GvCV(dstr) != (CV*)sref) {
3780 CV* cv = GvCV(dstr);
3782 if (!GvCVGEN((GV*)dstr) &&
3783 (CvROOT(cv) || CvXSUB(cv)))
3785 /* ahem, death to those who redefine
3786 * active sort subs */
3787 if (PL_curstackinfo->si_type == PERLSI_SORT &&
3788 PL_sortcop == CvSTART(cv))
3790 "Can't redefine active sort subroutine %s",
3791 GvENAME((GV*)dstr));
3792 /* Redefining a sub - warning is mandatory if
3793 it was a const and its value changed. */
3794 if (ckWARN(WARN_REDEFINE)
3796 && (!CvCONST((CV*)sref)
3797 || sv_cmp(cv_const_sv(cv),
3798 cv_const_sv((CV*)sref)))))
3800 Perl_warner(aTHX_ packWARN(WARN_REDEFINE),
3802 ? "Constant subroutine %s::%s redefined"
3803 : "Subroutine %s::%s redefined",
3804 HvNAME(GvSTASH((GV*)dstr)),
3805 GvENAME((GV*)dstr));
3809 cv_ckproto(cv, (GV*)dstr,
3810 SvPOK(sref) ? SvPVX(sref) : Nullch);
3812 GvCV(dstr) = (CV*)sref;
3813 GvCVGEN(dstr) = 0; /* Switch off cacheness. */
3814 GvASSUMECV_on(dstr);
3815 PL_sub_generation++;
3817 if (!GvIMPORTED_CV(dstr)
3818 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3820 GvIMPORTED_CV_on(dstr);
3825 SAVESPTR(GvIOp(dstr));
3827 dref = (SV*)GvIOp(dstr);
3828 GvIOp(dstr) = (IO*)sref;
3832 SAVESPTR(GvFORM(dstr));
3834 dref = (SV*)GvFORM(dstr);
3835 GvFORM(dstr) = (CV*)sref;
3839 SAVESPTR(GvSV(dstr));
3841 dref = (SV*)GvSV(dstr);
3843 if (!GvIMPORTED_SV(dstr)
3844 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3846 GvIMPORTED_SV_on(dstr);
3854 if (SvTAINTED(sstr))
3859 (void)SvOOK_off(dstr); /* backoff */
3861 Safefree(SvPVX(dstr));
3862 SvLEN(dstr)=SvCUR(dstr)=0;
3865 (void)SvOK_off(dstr);
3866 SvRV(dstr) = SvREFCNT_inc(SvRV(sstr));
3868 if (sflags & SVp_NOK) {
3870 /* Only set the public OK flag if the source has public OK. */
3871 if (sflags & SVf_NOK)
3872 SvFLAGS(dstr) |= SVf_NOK;
3873 SvNVX(dstr) = SvNVX(sstr);
3875 if (sflags & SVp_IOK) {
3876 (void)SvIOKp_on(dstr);
3877 if (sflags & SVf_IOK)
3878 SvFLAGS(dstr) |= SVf_IOK;
3879 if (sflags & SVf_IVisUV)
3881 SvIVX(dstr) = SvIVX(sstr);
3883 if (SvAMAGIC(sstr)) {
3887 else if (sflags & SVp_POK) {
3890 * Check to see if we can just swipe the string. If so, it's a
3891 * possible small lose on short strings, but a big win on long ones.
3892 * It might even be a win on short strings if SvPVX(dstr)
3893 * has to be allocated and SvPVX(sstr) has to be freed.
3896 if (SvTEMP(sstr) && /* slated for free anyway? */
3897 SvREFCNT(sstr) == 1 && /* and no other references to it? */
3898 !(sflags & SVf_OOK) && /* and not involved in OOK hack? */
3899 SvLEN(sstr) && /* and really is a string */
3900 /* and won't be needed again, potentially */
3901 !(PL_op && PL_op->op_type == OP_AASSIGN))
3903 if (SvPVX(dstr)) { /* we know that dtype >= SVt_PV */
3905 SvFLAGS(dstr) &= ~SVf_OOK;
3906 Safefree(SvPVX(dstr) - SvIVX(dstr));
3908 else if (SvLEN(dstr))
3909 Safefree(SvPVX(dstr));
3911 (void)SvPOK_only(dstr);
3912 SvPV_set(dstr, SvPVX(sstr));
3913 SvLEN_set(dstr, SvLEN(sstr));
3914 SvCUR_set(dstr, SvCUR(sstr));
3917 (void)SvOK_off(sstr); /* NOTE: nukes most SvFLAGS on sstr */
3918 SvPV_set(sstr, Nullch);
3923 else { /* have to copy actual string */
3924 STRLEN len = SvCUR(sstr);
3925 SvGROW(dstr, len + 1); /* inlined from sv_setpvn */
3926 Move(SvPVX(sstr),SvPVX(dstr),len,char);
3927 SvCUR_set(dstr, len);
3928 *SvEND(dstr) = '\0';
3929 (void)SvPOK_only(dstr);
3931 if (sflags & SVf_UTF8)
3934 if (sflags & SVp_NOK) {
3936 if (sflags & SVf_NOK)
3937 SvFLAGS(dstr) |= SVf_NOK;
3938 SvNVX(dstr) = SvNVX(sstr);
3940 if (sflags & SVp_IOK) {
3941 (void)SvIOKp_on(dstr);
3942 if (sflags & SVf_IOK)
3943 SvFLAGS(dstr) |= SVf_IOK;
3944 if (sflags & SVf_IVisUV)
3946 SvIVX(dstr) = SvIVX(sstr);
3949 else if (sflags & SVp_IOK) {
3950 if (sflags & SVf_IOK)
3951 (void)SvIOK_only(dstr);
3953 (void)SvOK_off(dstr);
3954 (void)SvIOKp_on(dstr);
3956 /* XXXX Do we want to set IsUV for IV(ROK)? Be extra safe... */
3957 if (sflags & SVf_IVisUV)
3959 SvIVX(dstr) = SvIVX(sstr);
3960 if (sflags & SVp_NOK) {
3961 if (sflags & SVf_NOK)
3962 (void)SvNOK_on(dstr);
3964 (void)SvNOKp_on(dstr);
3965 SvNVX(dstr) = SvNVX(sstr);
3968 else if (sflags & SVp_NOK) {
3969 if (sflags & SVf_NOK)
3970 (void)SvNOK_only(dstr);
3972 (void)SvOK_off(dstr);
3975 SvNVX(dstr) = SvNVX(sstr);
3978 if (dtype == SVt_PVGV) {
3979 if (ckWARN(WARN_MISC))
3980 Perl_warner(aTHX_ packWARN(WARN_MISC), "Undefined value assigned to typeglob");
3983 (void)SvOK_off(dstr);
3985 if (SvTAINTED(sstr))
3990 =for apidoc sv_setsv_mg
3992 Like C<sv_setsv>, but also handles 'set' magic.
3998 Perl_sv_setsv_mg(pTHX_ SV *dstr, register SV *sstr)
4000 sv_setsv(dstr,sstr);
4005 =for apidoc sv_setpvn
4007 Copies a string into an SV. The C<len> parameter indicates the number of
4008 bytes to be copied. Does not handle 'set' magic. See C<sv_setpvn_mg>.
4014 Perl_sv_setpvn(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
4016 register char *dptr;
4018 SV_CHECK_THINKFIRST(sv);
4024 /* len is STRLEN which is unsigned, need to copy to signed */
4027 Perl_croak(aTHX_ "panic: sv_setpvn called with negative strlen");
4029 (void)SvUPGRADE(sv, SVt_PV);
4031 SvGROW(sv, len + 1);
4033 Move(ptr,dptr,len,char);
4036 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4041 =for apidoc sv_setpvn_mg
4043 Like C<sv_setpvn>, but also handles 'set' magic.
4049 Perl_sv_setpvn_mg(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
4051 sv_setpvn(sv,ptr,len);
4056 =for apidoc sv_setpv
4058 Copies a string into an SV. The string must be null-terminated. Does not
4059 handle 'set' magic. See C<sv_setpv_mg>.
4065 Perl_sv_setpv(pTHX_ register SV *sv, register const char *ptr)
4067 register STRLEN len;
4069 SV_CHECK_THINKFIRST(sv);
4075 (void)SvUPGRADE(sv, SVt_PV);
4077 SvGROW(sv, len + 1);
4078 Move(ptr,SvPVX(sv),len+1,char);
4080 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4085 =for apidoc sv_setpv_mg
4087 Like C<sv_setpv>, but also handles 'set' magic.
4093 Perl_sv_setpv_mg(pTHX_ register SV *sv, register const char *ptr)
4100 =for apidoc sv_usepvn
4102 Tells an SV to use C<ptr> to find its string value. Normally the string is
4103 stored inside the SV but sv_usepvn allows the SV to use an outside string.
4104 The C<ptr> should point to memory that was allocated by C<malloc>. The
4105 string length, C<len>, must be supplied. This function will realloc the
4106 memory pointed to by C<ptr>, so that pointer should not be freed or used by
4107 the programmer after giving it to sv_usepvn. Does not handle 'set' magic.
4108 See C<sv_usepvn_mg>.
4114 Perl_sv_usepvn(pTHX_ register SV *sv, register char *ptr, register STRLEN len)
4116 SV_CHECK_THINKFIRST(sv);
4117 (void)SvUPGRADE(sv, SVt_PV);
4122 (void)SvOOK_off(sv);
4123 if (SvPVX(sv) && SvLEN(sv))
4124 Safefree(SvPVX(sv));
4125 Renew(ptr, len+1, char);
4128 SvLEN_set(sv, len+1);
4130 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4135 =for apidoc sv_usepvn_mg
4137 Like C<sv_usepvn>, but also handles 'set' magic.
4143 Perl_sv_usepvn_mg(pTHX_ register SV *sv, register char *ptr, register STRLEN len)
4145 sv_usepvn(sv,ptr,len);
4150 =for apidoc sv_force_normal_flags
4152 Undo various types of fakery on an SV: if the PV is a shared string, make
4153 a private copy; if we're a ref, stop refing; if we're a glob, downgrade to
4154 an xpvmg. The C<flags> parameter gets passed to C<sv_unref_flags()>
4155 when unrefing. C<sv_force_normal> calls this function with flags set to 0.
4161 Perl_sv_force_normal_flags(pTHX_ register SV *sv, U32 flags)
4163 if (SvREADONLY(sv)) {
4165 char *pvx = SvPVX(sv);
4166 STRLEN len = SvCUR(sv);
4167 U32 hash = SvUVX(sv);
4168 SvGROW(sv, len + 1);
4169 Move(pvx,SvPVX(sv),len,char);
4173 unsharepvn(pvx, SvUTF8(sv) ? -(I32)len : len, hash);
4175 else if (PL_curcop != &PL_compiling)
4176 Perl_croak(aTHX_ PL_no_modify);
4179 sv_unref_flags(sv, flags);
4180 else if (SvFAKE(sv) && SvTYPE(sv) == SVt_PVGV)
4185 =for apidoc sv_force_normal
4187 Undo various types of fakery on an SV: if the PV is a shared string, make
4188 a private copy; if we're a ref, stop refing; if we're a glob, downgrade to
4189 an xpvmg. See also C<sv_force_normal_flags>.
4195 Perl_sv_force_normal(pTHX_ register SV *sv)
4197 sv_force_normal_flags(sv, 0);
4203 Efficient removal of characters from the beginning of the string buffer.
4204 SvPOK(sv) must be true and the C<ptr> must be a pointer to somewhere inside
4205 the string buffer. The C<ptr> becomes the first character of the adjusted
4206 string. Uses the "OOK hack".
4212 Perl_sv_chop(pTHX_ register SV *sv, register char *ptr)
4214 register STRLEN delta;
4216 if (!ptr || !SvPOKp(sv))
4218 SV_CHECK_THINKFIRST(sv);
4219 if (SvTYPE(sv) < SVt_PVIV)
4220 sv_upgrade(sv,SVt_PVIV);
4223 if (!SvLEN(sv)) { /* make copy of shared string */
4224 char *pvx = SvPVX(sv);
4225 STRLEN len = SvCUR(sv);
4226 SvGROW(sv, len + 1);
4227 Move(pvx,SvPVX(sv),len,char);
4231 SvFLAGS(sv) |= SVf_OOK;
4233 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVp_IOK|SVp_NOK|SVf_IVisUV);
4234 delta = ptr - SvPVX(sv);
4242 =for apidoc sv_catpvn
4244 Concatenates the string onto the end of the string which is in the SV. The
4245 C<len> indicates number of bytes to copy. If the SV has the UTF8
4246 status set, then the bytes appended should be valid UTF8.
4247 Handles 'get' magic, but not 'set' magic. See C<sv_catpvn_mg>.
4249 =for apidoc sv_catpvn_flags
4251 Concatenates the string onto the end of the string which is in the SV. The
4252 C<len> indicates number of bytes to copy. If the SV has the UTF8
4253 status set, then the bytes appended should be valid UTF8.
4254 If C<flags> has C<SV_GMAGIC> bit set, will C<mg_get> on C<dsv> if
4255 appropriate, else not. C<sv_catpvn> and C<sv_catpvn_nomg> are implemented
4256 in terms of this function.
4262 Perl_sv_catpvn_flags(pTHX_ register SV *dsv, register const char *sstr, register STRLEN slen, I32 flags)
4267 dstr = SvPV_force_flags(dsv, dlen, flags);
4268 SvGROW(dsv, dlen + slen + 1);
4271 Move(sstr, SvPVX(dsv) + dlen, slen, char);
4274 (void)SvPOK_only_UTF8(dsv); /* validate pointer */
4279 =for apidoc sv_catpvn_mg
4281 Like C<sv_catpvn>, but also handles 'set' magic.
4287 Perl_sv_catpvn_mg(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
4289 sv_catpvn(sv,ptr,len);
4294 =for apidoc sv_catsv
4296 Concatenates the string from SV C<ssv> onto the end of the string in
4297 SV C<dsv>. Modifies C<dsv> but not C<ssv>. Handles 'get' magic, but
4298 not 'set' magic. See C<sv_catsv_mg>.
4300 =for apidoc sv_catsv_flags
4302 Concatenates the string from SV C<ssv> onto the end of the string in
4303 SV C<dsv>. Modifies C<dsv> but not C<ssv>. If C<flags> has C<SV_GMAGIC>
4304 bit set, will C<mg_get> on the SVs if appropriate, else not. C<sv_catsv>
4305 and C<sv_catsv_nomg> are implemented in terms of this function.
4310 Perl_sv_catsv_flags(pTHX_ SV *dsv, register SV *ssv, I32 flags)
4316 if ((spv = SvPV(ssv, slen))) {
4317 /* sutf8 and dutf8 were type bool, but under USE_ITHREADS,
4318 gcc version 2.95.2 20000220 (Debian GNU/Linux) for
4319 Linux xxx 2.2.17 on sparc64 with gcc -O2, we erroneously
4320 get dutf8 = 0x20000000, (i.e. SVf_UTF8) even though
4321 dsv->sv_flags doesn't have that bit set.
4322 Andy Dougherty 12 Oct 2001
4324 I32 sutf8 = DO_UTF8(ssv);
4327 if (SvGMAGICAL(dsv) && (flags & SV_GMAGIC))
4329 dutf8 = DO_UTF8(dsv);
4331 if (dutf8 != sutf8) {
4333 /* Not modifying source SV, so taking a temporary copy. */
4334 SV* csv = sv_2mortal(newSVpvn(spv, slen));
4336 sv_utf8_upgrade(csv);
4337 spv = SvPV(csv, slen);
4340 sv_utf8_upgrade_nomg(dsv);
4342 sv_catpvn_nomg(dsv, spv, slen);
4347 =for apidoc sv_catsv_mg
4349 Like C<sv_catsv>, but also handles 'set' magic.
4355 Perl_sv_catsv_mg(pTHX_ SV *dsv, register SV *ssv)
4362 =for apidoc sv_catpv
4364 Concatenates the string onto the end of the string which is in the SV.
4365 If the SV has the UTF8 status set, then the bytes appended should be
4366 valid UTF8. Handles 'get' magic, but not 'set' magic. See C<sv_catpv_mg>.
4371 Perl_sv_catpv(pTHX_ register SV *sv, register const char *ptr)
4373 register STRLEN len;
4379 junk = SvPV_force(sv, tlen);
4381 SvGROW(sv, tlen + len + 1);
4384 Move(ptr,SvPVX(sv)+tlen,len+1,char);
4386 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4391 =for apidoc sv_catpv_mg
4393 Like C<sv_catpv>, but also handles 'set' magic.
4399 Perl_sv_catpv_mg(pTHX_ register SV *sv, register const char *ptr)
4408 Create a new null SV, or if len > 0, create a new empty SVt_PV type SV
4409 with an initial PV allocation of len+1. Normally accessed via the C<NEWSV>
4416 Perl_newSV(pTHX_ STRLEN len)
4422 sv_upgrade(sv, SVt_PV);
4423 SvGROW(sv, len + 1);
4428 =for apidoc sv_magicext
4430 Adds magic to an SV, upgrading it if necessary. Applies the
4431 supplied vtable and returns pointer to the magic added.
4433 Note that sv_magicext will allow things that sv_magic will not.
4434 In particular you can add magic to SvREADONLY SVs and and more than
4435 one instance of the same 'how'
4437 I C<namelen> is greater then zero then a savepvn() I<copy> of C<name> is stored,
4438 if C<namelen> is zero then C<name> is stored as-is and - as another special
4439 case - if C<(name && namelen == HEf_SVKEY)> then C<name> is assumed to contain
4440 an C<SV*> and has its REFCNT incremented
4442 (This is now used as a subroutine by sv_magic.)
4447 Perl_sv_magicext(pTHX_ SV* sv, SV* obj, int how, MGVTBL *vtable,
4448 const char* name, I32 namlen)
4452 if (SvTYPE(sv) < SVt_PVMG) {
4453 (void)SvUPGRADE(sv, SVt_PVMG);
4455 Newz(702,mg, 1, MAGIC);
4456 mg->mg_moremagic = SvMAGIC(sv);
4459 /* Some magic sontains a reference loop, where the sv and object refer to
4460 each other. To prevent a reference loop that would prevent such
4461 objects being freed, we look for such loops and if we find one we
4462 avoid incrementing the object refcount. */
4463 if (!obj || obj == sv ||
4464 how == PERL_MAGIC_arylen ||
4465 how == PERL_MAGIC_qr ||
4466 (SvTYPE(obj) == SVt_PVGV &&
4467 (GvSV(obj) == sv || GvHV(obj) == (HV*)sv || GvAV(obj) == (AV*)sv ||
4468 GvCV(obj) == (CV*)sv || GvIOp(obj) == (IO*)sv ||
4469 GvFORM(obj) == (CV*)sv)))
4474 mg->mg_obj = SvREFCNT_inc(obj);
4475 mg->mg_flags |= MGf_REFCOUNTED;
4478 mg->mg_len = namlen;
4481 mg->mg_ptr = savepvn(name, namlen);
4482 else if (namlen == HEf_SVKEY)
4483 mg->mg_ptr = (char*)SvREFCNT_inc((SV*)name);
4485 mg->mg_ptr = (char *) name;
4487 mg->mg_virtual = vtable;
4491 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
4496 =for apidoc sv_magic
4498 Adds magic to an SV. First upgrades C<sv> to type C<SVt_PVMG> if necessary,
4499 then adds a new magic item of type C<how> to the head of the magic list.
4505 Perl_sv_magic(pTHX_ register SV *sv, SV *obj, int how, const char *name, I32 namlen)
4510 if (SvREADONLY(sv)) {
4511 if (PL_curcop != &PL_compiling
4512 && how != PERL_MAGIC_regex_global
4513 && how != PERL_MAGIC_bm
4514 && how != PERL_MAGIC_fm
4515 && how != PERL_MAGIC_sv
4518 Perl_croak(aTHX_ PL_no_modify);
4521 if (SvMAGICAL(sv) || (how == PERL_MAGIC_taint && SvTYPE(sv) >= SVt_PVMG)) {
4522 if (SvMAGIC(sv) && (mg = mg_find(sv, how))) {
4523 /* sv_magic() refuses to add a magic of the same 'how' as an
4526 if (how == PERL_MAGIC_taint)
4534 vtable = &PL_vtbl_sv;
4536 case PERL_MAGIC_overload:
4537 vtable = &PL_vtbl_amagic;
4539 case PERL_MAGIC_overload_elem:
4540 vtable = &PL_vtbl_amagicelem;
4542 case PERL_MAGIC_overload_table:
4543 vtable = &PL_vtbl_ovrld;
4546 vtable = &PL_vtbl_bm;
4548 case PERL_MAGIC_regdata:
4549 vtable = &PL_vtbl_regdata;
4551 case PERL_MAGIC_regdatum:
4552 vtable = &PL_vtbl_regdatum;
4554 case PERL_MAGIC_env:
4555 vtable = &PL_vtbl_env;
4558 vtable = &PL_vtbl_fm;
4560 case PERL_MAGIC_envelem:
4561 vtable = &PL_vtbl_envelem;
4563 case PERL_MAGIC_regex_global:
4564 vtable = &PL_vtbl_mglob;
4566 case PERL_MAGIC_isa:
4567 vtable = &PL_vtbl_isa;
4569 case PERL_MAGIC_isaelem:
4570 vtable = &PL_vtbl_isaelem;
4572 case PERL_MAGIC_nkeys:
4573 vtable = &PL_vtbl_nkeys;
4575 case PERL_MAGIC_dbfile:
4578 case PERL_MAGIC_dbline:
4579 vtable = &PL_vtbl_dbline;
4581 #ifdef USE_5005THREADS
4582 case PERL_MAGIC_mutex:
4583 vtable = &PL_vtbl_mutex;
4585 #endif /* USE_5005THREADS */
4586 #ifdef USE_LOCALE_COLLATE
4587 case PERL_MAGIC_collxfrm:
4588 vtable = &PL_vtbl_collxfrm;
4590 #endif /* USE_LOCALE_COLLATE */
4591 case PERL_MAGIC_tied:
4592 vtable = &PL_vtbl_pack;
4594 case PERL_MAGIC_tiedelem:
4595 case PERL_MAGIC_tiedscalar:
4596 vtable = &PL_vtbl_packelem;
4599 vtable = &PL_vtbl_regexp;
4601 case PERL_MAGIC_sig:
4602 vtable = &PL_vtbl_sig;
4604 case PERL_MAGIC_sigelem:
4605 vtable = &PL_vtbl_sigelem;
4607 case PERL_MAGIC_taint:
4608 vtable = &PL_vtbl_taint;
4610 case PERL_MAGIC_uvar:
4611 vtable = &PL_vtbl_uvar;
4613 case PERL_MAGIC_vec:
4614 vtable = &PL_vtbl_vec;
4616 case PERL_MAGIC_substr:
4617 vtable = &PL_vtbl_substr;
4619 case PERL_MAGIC_defelem:
4620 vtable = &PL_vtbl_defelem;
4622 case PERL_MAGIC_glob:
4623 vtable = &PL_vtbl_glob;
4625 case PERL_MAGIC_arylen:
4626 vtable = &PL_vtbl_arylen;
4628 case PERL_MAGIC_pos:
4629 vtable = &PL_vtbl_pos;
4631 case PERL_MAGIC_backref:
4632 vtable = &PL_vtbl_backref;
4634 case PERL_MAGIC_ext:
4635 /* Reserved for use by extensions not perl internals. */
4636 /* Useful for attaching extension internal data to perl vars. */
4637 /* Note that multiple extensions may clash if magical scalars */
4638 /* etc holding private data from one are passed to another. */
4641 Perl_croak(aTHX_ "Don't know how to handle magic of type \\%o", how);
4644 /* Rest of work is done else where */
4645 mg = sv_magicext(sv,obj,how,vtable,name,namlen);
4648 case PERL_MAGIC_taint:
4651 case PERL_MAGIC_ext:
4652 case PERL_MAGIC_dbfile:
4659 =for apidoc sv_unmagic
4661 Removes all magic of type C<type> from an SV.
4667 Perl_sv_unmagic(pTHX_ SV *sv, int type)
4671 if (SvTYPE(sv) < SVt_PVMG || !SvMAGIC(sv))
4674 for (mg = *mgp; mg; mg = *mgp) {
4675 if (mg->mg_type == type) {
4676 MGVTBL* vtbl = mg->mg_virtual;
4677 *mgp = mg->mg_moremagic;
4678 if (vtbl && vtbl->svt_free)
4679 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
4680 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
4682 Safefree(mg->mg_ptr);
4683 else if (mg->mg_len == HEf_SVKEY)
4684 SvREFCNT_dec((SV*)mg->mg_ptr);
4686 if (mg->mg_flags & MGf_REFCOUNTED)
4687 SvREFCNT_dec(mg->mg_obj);
4691 mgp = &mg->mg_moremagic;
4695 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_NOK|SVp_POK)) >> PRIVSHIFT;
4702 =for apidoc sv_rvweaken
4704 Weaken a reference: set the C<SvWEAKREF> flag on this RV; give the
4705 referred-to SV C<PERL_MAGIC_backref> magic if it hasn't already; and
4706 push a back-reference to this RV onto the array of backreferences
4707 associated with that magic.
4713 Perl_sv_rvweaken(pTHX_ SV *sv)
4716 if (!SvOK(sv)) /* let undefs pass */
4719 Perl_croak(aTHX_ "Can't weaken a nonreference");
4720 else if (SvWEAKREF(sv)) {
4721 if (ckWARN(WARN_MISC))
4722 Perl_warner(aTHX_ packWARN(WARN_MISC), "Reference is already weak");
4726 sv_add_backref(tsv, sv);
4732 /* Give tsv backref magic if it hasn't already got it, then push a
4733 * back-reference to sv onto the array associated with the backref magic.
4737 S_sv_add_backref(pTHX_ SV *tsv, SV *sv)
4741 if (SvMAGICAL(tsv) && (mg = mg_find(tsv, PERL_MAGIC_backref)))
4742 av = (AV*)mg->mg_obj;
4745 sv_magic(tsv, (SV*)av, PERL_MAGIC_backref, NULL, 0);
4746 SvREFCNT_dec(av); /* for sv_magic */
4751 /* delete a back-reference to ourselves from the backref magic associated
4752 * with the SV we point to.
4756 S_sv_del_backref(pTHX_ SV *sv)
4763 if (!SvMAGICAL(tsv) || !(mg = mg_find(tsv, PERL_MAGIC_backref)))
4764 Perl_croak(aTHX_ "panic: del_backref");
4765 av = (AV *)mg->mg_obj;
4770 svp[i] = &PL_sv_undef; /* XXX */
4777 =for apidoc sv_insert
4779 Inserts a string at the specified offset/length within the SV. Similar to
4780 the Perl substr() function.
4786 Perl_sv_insert(pTHX_ SV *bigstr, STRLEN offset, STRLEN len, char *little, STRLEN littlelen)
4790 register char *midend;
4791 register char *bigend;
4797 Perl_croak(aTHX_ "Can't modify non-existent substring");
4798 SvPV_force(bigstr, curlen);
4799 (void)SvPOK_only_UTF8(bigstr);
4800 if (offset + len > curlen) {
4801 SvGROW(bigstr, offset+len+1);
4802 Zero(SvPVX(bigstr)+curlen, offset+len-curlen, char);
4803 SvCUR_set(bigstr, offset+len);
4807 i = littlelen - len;
4808 if (i > 0) { /* string might grow */
4809 big = SvGROW(bigstr, SvCUR(bigstr) + i + 1);
4810 mid = big + offset + len;
4811 midend = bigend = big + SvCUR(bigstr);
4814 while (midend > mid) /* shove everything down */
4815 *--bigend = *--midend;
4816 Move(little,big+offset,littlelen,char);
4822 Move(little,SvPVX(bigstr)+offset,len,char);
4827 big = SvPVX(bigstr);
4830 bigend = big + SvCUR(bigstr);
4832 if (midend > bigend)
4833 Perl_croak(aTHX_ "panic: sv_insert");
4835 if (mid - big > bigend - midend) { /* faster to shorten from end */
4837 Move(little, mid, littlelen,char);
4840 i = bigend - midend;
4842 Move(midend, mid, i,char);
4846 SvCUR_set(bigstr, mid - big);
4849 else if ((i = mid - big)) { /* faster from front */
4850 midend -= littlelen;
4852 sv_chop(bigstr,midend-i);
4857 Move(little, mid, littlelen,char);
4859 else if (littlelen) {
4860 midend -= littlelen;
4861 sv_chop(bigstr,midend);
4862 Move(little,midend,littlelen,char);
4865 sv_chop(bigstr,midend);
4871 =for apidoc sv_replace
4873 Make the first argument a copy of the second, then delete the original.
4874 The target SV physically takes over ownership of the body of the source SV
4875 and inherits its flags; however, the target keeps any magic it owns,
4876 and any magic in the source is discarded.
4877 Note that this is a rather specialist SV copying operation; most of the
4878 time you'll want to use C<sv_setsv> or one of its many macro front-ends.
4884 Perl_sv_replace(pTHX_ register SV *sv, register SV *nsv)
4886 U32 refcnt = SvREFCNT(sv);
4887 SV_CHECK_THINKFIRST(sv);
4888 if (SvREFCNT(nsv) != 1 && ckWARN_d(WARN_INTERNAL))
4889 Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Reference miscount in sv_replace()");
4890 if (SvMAGICAL(sv)) {
4894 sv_upgrade(nsv, SVt_PVMG);
4895 SvMAGIC(nsv) = SvMAGIC(sv);
4896 SvFLAGS(nsv) |= SvMAGICAL(sv);
4902 assert(!SvREFCNT(sv));
4903 StructCopy(nsv,sv,SV);
4904 SvREFCNT(sv) = refcnt;
4905 SvFLAGS(nsv) |= SVTYPEMASK; /* Mark as freed */
4910 =for apidoc sv_clear
4912 Clear an SV: call any destructors, free up any memory used by the body,
4913 and free the body itself. The SV's head is I<not> freed, although
4914 its type is set to all 1's so that it won't inadvertently be assumed
4915 to be live during global destruction etc.
4916 This function should only be called when REFCNT is zero. Most of the time
4917 you'll want to call C<sv_free()> (or its macro wrapper C<SvREFCNT_dec>)
4924 Perl_sv_clear(pTHX_ register SV *sv)
4928 assert(SvREFCNT(sv) == 0);
4931 if (PL_defstash) { /* Still have a symbol table? */
4936 Zero(&tmpref, 1, SV);
4937 sv_upgrade(&tmpref, SVt_RV);
4939 SvREADONLY_on(&tmpref); /* DESTROY() could be naughty */
4940 SvREFCNT(&tmpref) = 1;
4943 stash = SvSTASH(sv);
4944 destructor = StashHANDLER(stash,DESTROY);
4947 PUSHSTACKi(PERLSI_DESTROY);
4948 SvRV(&tmpref) = SvREFCNT_inc(sv);
4953 call_sv((SV*)destructor, G_DISCARD|G_EVAL|G_KEEPERR);
4959 } while (SvOBJECT(sv) && SvSTASH(sv) != stash);
4961 del_XRV(SvANY(&tmpref));
4964 if (PL_in_clean_objs)
4965 Perl_croak(aTHX_ "DESTROY created new reference to dead object '%s'",
4967 /* DESTROY gave object new lease on life */
4973 SvREFCNT_dec(SvSTASH(sv)); /* possibly of changed persuasion */
4974 SvOBJECT_off(sv); /* Curse the object. */
4975 if (SvTYPE(sv) != SVt_PVIO)
4976 --PL_sv_objcount; /* XXX Might want something more general */
4979 if (SvTYPE(sv) >= SVt_PVMG) {
4982 if (SvFLAGS(sv) & SVpad_TYPED)
4983 SvREFCNT_dec(SvSTASH(sv));
4986 switch (SvTYPE(sv)) {
4989 IoIFP(sv) != PerlIO_stdin() &&
4990 IoIFP(sv) != PerlIO_stdout() &&
4991 IoIFP(sv) != PerlIO_stderr())
4993 io_close((IO*)sv, FALSE);
4995 if (IoDIRP(sv) && !(IoFLAGS(sv) & IOf_FAKE_DIRP))
4996 PerlDir_close(IoDIRP(sv));
4997 IoDIRP(sv) = (DIR*)NULL;
4998 Safefree(IoTOP_NAME(sv));
4999 Safefree(IoFMT_NAME(sv));
5000 Safefree(IoBOTTOM_NAME(sv));
5015 SvREFCNT_dec(LvTARG(sv));
5019 Safefree(GvNAME(sv));
5020 /* cannot decrease stash refcount yet, as we might recursively delete
5021 ourselves when the refcnt drops to zero. Delay SvREFCNT_dec
5022 of stash until current sv is completely gone.
5023 -- JohnPC, 27 Mar 1998 */
5024 stash = GvSTASH(sv);
5030 (void)SvOOK_off(sv);
5038 SvREFCNT_dec(SvRV(sv));
5040 else if (SvPVX(sv) && SvLEN(sv))
5041 Safefree(SvPVX(sv));
5042 else if (SvPVX(sv) && SvREADONLY(sv) && SvFAKE(sv)) {
5043 unsharepvn(SvPVX(sv),
5044 SvUTF8(sv) ? -(I32)SvCUR(sv) : SvCUR(sv),
5057 switch (SvTYPE(sv)) {
5073 del_XPVIV(SvANY(sv));
5076 del_XPVNV(SvANY(sv));
5079 del_XPVMG(SvANY(sv));
5082 del_XPVLV(SvANY(sv));
5085 del_XPVAV(SvANY(sv));
5088 del_XPVHV(SvANY(sv));
5091 del_XPVCV(SvANY(sv));
5094 del_XPVGV(SvANY(sv));
5095 /* code duplication for increased performance. */
5096 SvFLAGS(sv) &= SVf_BREAK;
5097 SvFLAGS(sv) |= SVTYPEMASK;
5098 /* decrease refcount of the stash that owns this GV, if any */
5100 SvREFCNT_dec(stash);
5101 return; /* not break, SvFLAGS reset already happened */
5103 del_XPVBM(SvANY(sv));
5106 del_XPVFM(SvANY(sv));
5109 del_XPVIO(SvANY(sv));
5112 SvFLAGS(sv) &= SVf_BREAK;
5113 SvFLAGS(sv) |= SVTYPEMASK;
5117 =for apidoc sv_newref
5119 Increment an SV's reference count. Use the C<SvREFCNT_inc()> wrapper
5126 Perl_sv_newref(pTHX_ SV *sv)
5129 ATOMIC_INC(SvREFCNT(sv));
5136 Decrement an SV's reference count, and if it drops to zero, call
5137 C<sv_clear> to invoke destructors and free up any memory used by
5138 the body; finally, deallocate the SV's head itself.
5139 Normally called via a wrapper macro C<SvREFCNT_dec>.
5145 Perl_sv_free(pTHX_ SV *sv)
5147 int refcount_is_zero;
5151 if (SvREFCNT(sv) == 0) {
5152 if (SvFLAGS(sv) & SVf_BREAK)
5153 /* this SV's refcnt has been artificially decremented to
5154 * trigger cleanup */
5156 if (PL_in_clean_all) /* All is fair */
5158 if (SvREADONLY(sv) && SvIMMORTAL(sv)) {
5159 /* make sure SvREFCNT(sv)==0 happens very seldom */
5160 SvREFCNT(sv) = (~(U32)0)/2;
5163 if (ckWARN_d(WARN_INTERNAL))
5164 Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Attempt to free unreferenced scalar");
5167 ATOMIC_DEC_AND_TEST(refcount_is_zero, SvREFCNT(sv));
5168 if (!refcount_is_zero)
5172 if (ckWARN_d(WARN_DEBUGGING))
5173 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
5174 "Attempt to free temp prematurely: SV 0x%"UVxf,
5179 if (SvREADONLY(sv) && SvIMMORTAL(sv)) {
5180 /* make sure SvREFCNT(sv)==0 happens very seldom */
5181 SvREFCNT(sv) = (~(U32)0)/2;
5192 Returns the length of the string in the SV. Handles magic and type
5193 coercion. See also C<SvCUR>, which gives raw access to the xpv_cur slot.
5199 Perl_sv_len(pTHX_ register SV *sv)
5207 len = mg_length(sv);
5209 (void)SvPV(sv, len);
5214 =for apidoc sv_len_utf8
5216 Returns the number of characters in the string in an SV, counting wide
5217 UTF8 bytes as a single character. Handles magic and type coercion.
5223 Perl_sv_len_utf8(pTHX_ register SV *sv)
5229 return mg_length(sv);
5233 U8 *s = (U8*)SvPV(sv, len);
5235 return Perl_utf8_length(aTHX_ s, s + len);
5240 =for apidoc sv_pos_u2b
5242 Converts the value pointed to by offsetp from a count of UTF8 chars from
5243 the start of the string, to a count of the equivalent number of bytes; if
5244 lenp is non-zero, it does the same to lenp, but this time starting from
5245 the offset, rather than from the start of the string. Handles magic and
5252 Perl_sv_pos_u2b(pTHX_ register SV *sv, I32* offsetp, I32* lenp)
5257 I32 uoffset = *offsetp;
5263 start = s = (U8*)SvPV(sv, len);
5265 while (s < send && uoffset--)
5269 *offsetp = s - start;
5273 while (s < send && ulen--)
5283 =for apidoc sv_pos_b2u
5285 Converts the value pointed to by offsetp from a count of bytes from the
5286 start of the string, to a count of the equivalent number of UTF8 chars.
5287 Handles magic and type coercion.
5293 Perl_sv_pos_b2u(pTHX_ register SV *sv, I32* offsetp)
5302 s = (U8*)SvPV(sv, len);
5303 if ((I32)len < *offsetp)
5304 Perl_croak(aTHX_ "panic: sv_pos_b2u: bad byte offset");
5305 send = s + *offsetp;
5309 /* Call utf8n_to_uvchr() to validate the sequence */
5310 utf8n_to_uvchr(s, UTF8SKIP(s), &n, 0);
5325 Returns a boolean indicating whether the strings in the two SVs are
5326 identical. Is UTF-8 and 'use bytes' aware, handles get magic, and will
5327 coerce its args to strings if necessary.
5333 Perl_sv_eq(pTHX_ register SV *sv1, register SV *sv2)
5341 SV* svrecode = Nullsv;
5348 pv1 = SvPV(sv1, cur1);
5355 pv2 = SvPV(sv2, cur2);
5357 if (cur1 && cur2 && SvUTF8(sv1) != SvUTF8(sv2) && !IN_BYTES) {
5358 /* Differing utf8ness.
5359 * Do not UTF8size the comparands as a side-effect. */
5362 svrecode = newSVpvn(pv2, cur2);
5363 sv_recode_to_utf8(svrecode, PL_encoding);
5364 pv2 = SvPV(svrecode, cur2);
5367 svrecode = newSVpvn(pv1, cur1);
5368 sv_recode_to_utf8(svrecode, PL_encoding);
5369 pv1 = SvPV(svrecode, cur1);
5371 /* Now both are in UTF-8. */
5376 bool is_utf8 = TRUE;
5379 /* sv1 is the UTF-8 one,
5380 * if is equal it must be downgrade-able */
5381 char *pv = (char*)bytes_from_utf8((U8*)pv1,
5387 /* sv2 is the UTF-8 one,
5388 * if is equal it must be downgrade-able */
5389 char *pv = (char *)bytes_from_utf8((U8*)pv2,
5395 /* Downgrade not possible - cannot be eq */
5402 eq = memEQ(pv1, pv2, cur1);
5405 SvREFCNT_dec(svrecode);
5416 Compares the strings in two SVs. Returns -1, 0, or 1 indicating whether the
5417 string in C<sv1> is less than, equal to, or greater than the string in
5418 C<sv2>. Is UTF-8 and 'use bytes' aware, handles get magic, and will
5419 coerce its args to strings if necessary. See also C<sv_cmp_locale>.
5425 Perl_sv_cmp(pTHX_ register SV *sv1, register SV *sv2)
5428 char *pv1, *pv2, *tpv = Nullch;
5430 SV *svrecode = Nullsv;
5437 pv1 = SvPV(sv1, cur1);
5444 pv2 = SvPV(sv2, cur2);
5446 if (cur1 && cur2 && SvUTF8(sv1) != SvUTF8(sv2) && !IN_BYTES) {
5447 /* Differing utf8ness.
5448 * Do not UTF8size the comparands as a side-effect. */
5451 svrecode = newSVpvn(pv2, cur2);
5452 sv_recode_to_utf8(svrecode, PL_encoding);
5453 pv2 = SvPV(svrecode, cur2);
5456 pv2 = tpv = (char*)bytes_to_utf8((U8*)pv2, &cur2);
5461 svrecode = newSVpvn(pv1, cur1);
5462 sv_recode_to_utf8(svrecode, PL_encoding);
5463 pv1 = SvPV(svrecode, cur1);
5466 pv1 = tpv = (char*)bytes_to_utf8((U8*)pv1, &cur1);
5472 cmp = cur2 ? -1 : 0;
5476 I32 retval = memcmp((void*)pv1, (void*)pv2, cur1 < cur2 ? cur1 : cur2);
5479 cmp = retval < 0 ? -1 : 1;
5480 } else if (cur1 == cur2) {
5483 cmp = cur1 < cur2 ? -1 : 1;
5488 SvREFCNT_dec(svrecode);
5497 =for apidoc sv_cmp_locale
5499 Compares the strings in two SVs in a locale-aware manner. Is UTF-8 and
5500 'use bytes' aware, handles get magic, and will coerce its args to strings
5501 if necessary. See also C<sv_cmp_locale>. See also C<sv_cmp>.
5507 Perl_sv_cmp_locale(pTHX_ register SV *sv1, register SV *sv2)
5509 #ifdef USE_LOCALE_COLLATE
5515 if (PL_collation_standard)
5519 pv1 = sv1 ? sv_collxfrm(sv1, &len1) : (char *) NULL;
5521 pv2 = sv2 ? sv_collxfrm(sv2, &len2) : (char *) NULL;
5523 if (!pv1 || !len1) {
5534 retval = memcmp((void*)pv1, (void*)pv2, len1 < len2 ? len1 : len2);
5537 return retval < 0 ? -1 : 1;
5540 * When the result of collation is equality, that doesn't mean
5541 * that there are no differences -- some locales exclude some
5542 * characters from consideration. So to avoid false equalities,
5543 * we use the raw string as a tiebreaker.
5549 #endif /* USE_LOCALE_COLLATE */
5551 return sv_cmp(sv1, sv2);
5555 #ifdef USE_LOCALE_COLLATE
5558 =for apidoc sv_collxfrm
5560 Add Collate Transform magic to an SV if it doesn't already have it.
5562 Any scalar variable may carry PERL_MAGIC_collxfrm magic that contains the
5563 scalar data of the variable, but transformed to such a format that a normal
5564 memory comparison can be used to compare the data according to the locale
5571 Perl_sv_collxfrm(pTHX_ SV *sv, STRLEN *nxp)
5575 mg = SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_collxfrm) : (MAGIC *) NULL;
5576 if (!mg || !mg->mg_ptr || *(U32*)mg->mg_ptr != PL_collation_ix) {
5581 Safefree(mg->mg_ptr);
5583 if ((xf = mem_collxfrm(s, len, &xlen))) {
5584 if (SvREADONLY(sv)) {
5587 return xf + sizeof(PL_collation_ix);
5590 sv_magic(sv, 0, PERL_MAGIC_collxfrm, 0, 0);
5591 mg = mg_find(sv, PERL_MAGIC_collxfrm);
5604 if (mg && mg->mg_ptr) {
5606 return mg->mg_ptr + sizeof(PL_collation_ix);
5614 #endif /* USE_LOCALE_COLLATE */
5619 Get a line from the filehandle and store it into the SV, optionally
5620 appending to the currently-stored string.
5626 Perl_sv_gets(pTHX_ register SV *sv, register PerlIO *fp, I32 append)
5630 register STDCHAR rslast;
5631 register STDCHAR *bp;
5636 SV_CHECK_THINKFIRST(sv);
5637 (void)SvUPGRADE(sv, SVt_PV);
5641 if (PL_curcop == &PL_compiling) {
5642 /* we always read code in line mode */
5646 else if (RsSNARF(PL_rs)) {
5650 else if (RsRECORD(PL_rs)) {
5651 I32 recsize, bytesread;
5654 /* Grab the size of the record we're getting */
5655 recsize = SvIV(SvRV(PL_rs));
5656 (void)SvPOK_only(sv); /* Validate pointer */
5657 buffer = SvGROW(sv, (STRLEN)(recsize + 1));
5660 /* VMS wants read instead of fread, because fread doesn't respect */
5661 /* RMS record boundaries. This is not necessarily a good thing to be */
5662 /* doing, but we've got no other real choice */
5663 bytesread = PerlLIO_read(PerlIO_fileno(fp), buffer, recsize);
5665 bytesread = PerlIO_read(fp, buffer, recsize);
5667 SvCUR_set(sv, bytesread);
5668 buffer[bytesread] = '\0';
5669 if (PerlIO_isutf8(fp))
5673 return(SvCUR(sv) ? SvPVX(sv) : Nullch);
5675 else if (RsPARA(PL_rs)) {
5681 /* Get $/ i.e. PL_rs into same encoding as stream wants */
5682 if (PerlIO_isutf8(fp)) {
5683 rsptr = SvPVutf8(PL_rs, rslen);
5686 if (SvUTF8(PL_rs)) {
5687 if (!sv_utf8_downgrade(PL_rs, TRUE)) {
5688 Perl_croak(aTHX_ "Wide character in $/");
5691 rsptr = SvPV(PL_rs, rslen);
5695 rslast = rslen ? rsptr[rslen - 1] : '\0';
5697 if (rspara) { /* have to do this both before and after */
5698 do { /* to make sure file boundaries work right */
5701 i = PerlIO_getc(fp);
5705 PerlIO_ungetc(fp,i);
5711 /* See if we know enough about I/O mechanism to cheat it ! */
5713 /* This used to be #ifdef test - it is made run-time test for ease
5714 of abstracting out stdio interface. One call should be cheap
5715 enough here - and may even be a macro allowing compile
5719 if (PerlIO_fast_gets(fp)) {
5722 * We're going to steal some values from the stdio struct
5723 * and put EVERYTHING in the innermost loop into registers.
5725 register STDCHAR *ptr;
5729 #if defined(VMS) && defined(PERLIO_IS_STDIO)
5730 /* An ungetc()d char is handled separately from the regular
5731 * buffer, so we getc() it back out and stuff it in the buffer.
5733 i = PerlIO_getc(fp);
5734 if (i == EOF) return 0;
5735 *(--((*fp)->_ptr)) = (unsigned char) i;
5739 /* Here is some breathtakingly efficient cheating */
5741 cnt = PerlIO_get_cnt(fp); /* get count into register */
5742 (void)SvPOK_only(sv); /* validate pointer */
5743 if ((I32)(SvLEN(sv) - append) <= cnt + 1) { /* make sure we have the room */
5744 if (cnt > 80 && (I32)SvLEN(sv) > append) {
5745 shortbuffered = cnt - SvLEN(sv) + append + 1;
5746 cnt -= shortbuffered;
5750 /* remember that cnt can be negative */
5751 SvGROW(sv, (STRLEN)(append + (cnt <= 0 ? 2 : (cnt + 1))));
5756 bp = (STDCHAR*)SvPVX(sv) + append; /* move these two too to registers */
5757 ptr = (STDCHAR*)PerlIO_get_ptr(fp);
5758 DEBUG_P(PerlIO_printf(Perl_debug_log,
5759 "Screamer: entering, ptr=%"UVuf", cnt=%ld\n",PTR2UV(ptr),(long)cnt));
5760 DEBUG_P(PerlIO_printf(Perl_debug_log,
5761 "Screamer: entering: PerlIO * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
5762 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
5763 PTR2UV(PerlIO_has_base(fp) ? PerlIO_get_base(fp) : 0)));
5768 while (cnt > 0) { /* this | eat */
5770 if ((*bp++ = *ptr++) == rslast) /* really | dust */
5771 goto thats_all_folks; /* screams | sed :-) */
5775 Copy(ptr, bp, cnt, char); /* this | eat */
5776 bp += cnt; /* screams | dust */
5777 ptr += cnt; /* louder | sed :-) */
5782 if (shortbuffered) { /* oh well, must extend */
5783 cnt = shortbuffered;
5785 bpx = bp - (STDCHAR*)SvPVX(sv); /* box up before relocation */
5787 SvGROW(sv, SvLEN(sv) + append + cnt + 2);
5788 bp = (STDCHAR*)SvPVX(sv) + bpx; /* unbox after relocation */
5792 DEBUG_P(PerlIO_printf(Perl_debug_log,
5793 "Screamer: going to getc, ptr=%"UVuf", cnt=%ld\n",
5794 PTR2UV(ptr),(long)cnt));
5795 PerlIO_set_ptrcnt(fp, (STDCHAR*)ptr, cnt); /* deregisterize cnt and ptr */
5797 DEBUG_P(PerlIO_printf(Perl_debug_log,
5798 "Screamer: pre: FILE * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
5799 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
5800 PTR2UV(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0)));
5802 /* This used to call 'filbuf' in stdio form, but as that behaves like
5803 getc when cnt <= 0 we use PerlIO_getc here to avoid introducing
5804 another abstraction. */
5805 i = PerlIO_getc(fp); /* get more characters */
5807 DEBUG_P(PerlIO_printf(Perl_debug_log,
5808 "Screamer: post: 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 cnt = PerlIO_get_cnt(fp);
5813 ptr = (STDCHAR*)PerlIO_get_ptr(fp); /* reregisterize cnt and ptr */
5814 DEBUG_P(PerlIO_printf(Perl_debug_log,
5815 "Screamer: after getc, ptr=%"UVuf", cnt=%ld\n",PTR2UV(ptr),(long)cnt));
5817 if (i == EOF) /* all done for ever? */
5818 goto thats_really_all_folks;
5820 bpx = bp - (STDCHAR*)SvPVX(sv); /* box up before relocation */
5822 SvGROW(sv, bpx + cnt + 2);
5823 bp = (STDCHAR*)SvPVX(sv) + bpx; /* unbox after relocation */
5825 *bp++ = (STDCHAR)i; /* store character from PerlIO_getc */
5827 if (rslen && (STDCHAR)i == rslast) /* all done for now? */
5828 goto thats_all_folks;
5832 if ((rslen > 1 && (STRLEN)(bp - (STDCHAR*)SvPVX(sv)) < rslen) ||
5833 memNE((char*)bp - rslen, rsptr, rslen))
5834 goto screamer; /* go back to the fray */
5835 thats_really_all_folks:
5837 cnt += shortbuffered;
5838 DEBUG_P(PerlIO_printf(Perl_debug_log,
5839 "Screamer: quitting, ptr=%"UVuf", cnt=%ld\n",PTR2UV(ptr),(long)cnt));
5840 PerlIO_set_ptrcnt(fp, (STDCHAR*)ptr, cnt); /* put these back or we're in trouble */
5841 DEBUG_P(PerlIO_printf(Perl_debug_log,
5842 "Screamer: end: FILE * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
5843 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
5844 PTR2UV(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0)));
5846 SvCUR_set(sv, bp - (STDCHAR*)SvPVX(sv)); /* set length */
5847 DEBUG_P(PerlIO_printf(Perl_debug_log,
5848 "Screamer: done, len=%ld, string=|%.*s|\n",
5849 (long)SvCUR(sv),(int)SvCUR(sv),SvPVX(sv)));
5854 /*The big, slow, and stupid way */
5857 /* Need to work around EPOC SDK features */
5858 /* On WINS: MS VC5 generates calls to _chkstk, */
5859 /* if a `large' stack frame is allocated */
5860 /* gcc on MARM does not generate calls like these */
5866 register STDCHAR *bpe = buf + sizeof(buf);
5868 while ((i = PerlIO_getc(fp)) != EOF && (*bp++ = (STDCHAR)i) != rslast && bp < bpe)
5869 ; /* keep reading */
5873 cnt = PerlIO_read(fp,(char*)buf, sizeof(buf));
5874 /* Accomodate broken VAXC compiler, which applies U8 cast to
5875 * both args of ?: operator, causing EOF to change into 255
5877 if (cnt) { i = (U8)buf[cnt - 1]; } else { i = EOF; }
5881 sv_catpvn(sv, (char *) buf, cnt);
5883 sv_setpvn(sv, (char *) buf, cnt);
5885 if (i != EOF && /* joy */
5887 SvCUR(sv) < rslen ||
5888 memNE(SvPVX(sv) + SvCUR(sv) - rslen, rsptr, rslen)))
5892 * If we're reading from a TTY and we get a short read,
5893 * indicating that the user hit his EOF character, we need
5894 * to notice it now, because if we try to read from the TTY
5895 * again, the EOF condition will disappear.
5897 * The comparison of cnt to sizeof(buf) is an optimization
5898 * that prevents unnecessary calls to feof().
5902 if (!(cnt < sizeof(buf) && PerlIO_eof(fp)))
5907 if (rspara) { /* have to do this both before and after */
5908 while (i != EOF) { /* to make sure file boundaries work right */
5909 i = PerlIO_getc(fp);
5911 PerlIO_ungetc(fp,i);
5917 if (PerlIO_isutf8(fp))
5922 return (SvCUR(sv) - append) ? SvPVX(sv) : Nullch;
5928 Auto-increment of the value in the SV, doing string to numeric conversion
5929 if necessary. Handles 'get' magic.
5935 Perl_sv_inc(pTHX_ register SV *sv)
5944 if (SvTHINKFIRST(sv)) {
5945 if (SvREADONLY(sv) && SvFAKE(sv))
5946 sv_force_normal(sv);
5947 if (SvREADONLY(sv)) {
5948 if (PL_curcop != &PL_compiling)
5949 Perl_croak(aTHX_ PL_no_modify);
5953 if (SvAMAGIC(sv) && AMG_CALLun(sv,inc))
5955 i = PTR2IV(SvRV(sv));
5960 flags = SvFLAGS(sv);
5961 if ((flags & (SVp_NOK|SVp_IOK)) == SVp_NOK) {
5962 /* It's (privately or publicly) a float, but not tested as an
5963 integer, so test it to see. */
5965 flags = SvFLAGS(sv);
5967 if ((flags & SVf_IOK) || ((flags & (SVp_IOK | SVp_NOK)) == SVp_IOK)) {
5968 /* It's publicly an integer, or privately an integer-not-float */
5969 #ifdef PERL_PRESERVE_IVUV
5973 if (SvUVX(sv) == UV_MAX)
5974 sv_setnv(sv, UV_MAX_P1);
5976 (void)SvIOK_only_UV(sv);
5979 if (SvIVX(sv) == IV_MAX)
5980 sv_setuv(sv, (UV)IV_MAX + 1);
5982 (void)SvIOK_only(sv);
5988 if (flags & SVp_NOK) {
5989 (void)SvNOK_only(sv);
5994 if (!(flags & SVp_POK) || !*SvPVX(sv)) {
5995 if ((flags & SVTYPEMASK) < SVt_PVIV)
5996 sv_upgrade(sv, SVt_IV);
5997 (void)SvIOK_only(sv);
6002 while (isALPHA(*d)) d++;
6003 while (isDIGIT(*d)) d++;
6005 #ifdef PERL_PRESERVE_IVUV
6006 /* Got to punt this as an integer if needs be, but we don't issue
6007 warnings. Probably ought to make the sv_iv_please() that does
6008 the conversion if possible, and silently. */
6009 int numtype = grok_number(SvPVX(sv), SvCUR(sv), NULL);
6010 if (numtype && !(numtype & IS_NUMBER_INFINITY)) {
6011 /* Need to try really hard to see if it's an integer.
6012 9.22337203685478e+18 is an integer.
6013 but "9.22337203685478e+18" + 0 is UV=9223372036854779904
6014 so $a="9.22337203685478e+18"; $a+0; $a++
6015 needs to be the same as $a="9.22337203685478e+18"; $a++
6022 /* sv_2iv *should* have made this an NV */
6023 if (flags & SVp_NOK) {
6024 (void)SvNOK_only(sv);
6028 /* I don't think we can get here. Maybe I should assert this
6029 And if we do get here I suspect that sv_setnv will croak. NWC
6031 #if defined(USE_LONG_DOUBLE)
6032 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",
6033 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
6035 DEBUG_c(PerlIO_printf(Perl_debug_log,"sv_inc punt failed to convert '%s' to IOK or NOKp, UV=0x%"UVxf" NV=%"NVgf"\n",
6036 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
6039 #endif /* PERL_PRESERVE_IVUV */
6040 sv_setnv(sv,Atof(SvPVX(sv)) + 1.0);
6044 while (d >= SvPVX(sv)) {
6052 /* MKS: The original code here died if letters weren't consecutive.
6053 * at least it didn't have to worry about non-C locales. The
6054 * new code assumes that ('z'-'a')==('Z'-'A'), letters are
6055 * arranged in order (although not consecutively) and that only
6056 * [A-Za-z] are accepted by isALPHA in the C locale.
6058 if (*d != 'z' && *d != 'Z') {
6059 do { ++*d; } while (!isALPHA(*d));
6062 *(d--) -= 'z' - 'a';
6067 *(d--) -= 'z' - 'a' + 1;
6071 /* oh,oh, the number grew */
6072 SvGROW(sv, SvCUR(sv) + 2);
6074 for (d = SvPVX(sv) + SvCUR(sv); d > SvPVX(sv); d--)
6085 Auto-decrement of the value in the SV, doing string to numeric conversion
6086 if necessary. Handles 'get' magic.
6092 Perl_sv_dec(pTHX_ register SV *sv)
6100 if (SvTHINKFIRST(sv)) {
6101 if (SvREADONLY(sv) && SvFAKE(sv))
6102 sv_force_normal(sv);
6103 if (SvREADONLY(sv)) {
6104 if (PL_curcop != &PL_compiling)
6105 Perl_croak(aTHX_ PL_no_modify);
6109 if (SvAMAGIC(sv) && AMG_CALLun(sv,dec))
6111 i = PTR2IV(SvRV(sv));
6116 /* Unlike sv_inc we don't have to worry about string-never-numbers
6117 and keeping them magic. But we mustn't warn on punting */
6118 flags = SvFLAGS(sv);
6119 if ((flags & SVf_IOK) || ((flags & (SVp_IOK | SVp_NOK)) == SVp_IOK)) {
6120 /* It's publicly an integer, or privately an integer-not-float */
6121 #ifdef PERL_PRESERVE_IVUV
6125 if (SvUVX(sv) == 0) {
6126 (void)SvIOK_only(sv);
6130 (void)SvIOK_only_UV(sv);
6134 if (SvIVX(sv) == IV_MIN)
6135 sv_setnv(sv, (NV)IV_MIN - 1.0);
6137 (void)SvIOK_only(sv);
6143 if (flags & SVp_NOK) {
6145 (void)SvNOK_only(sv);
6148 if (!(flags & SVp_POK)) {
6149 if ((flags & SVTYPEMASK) < SVt_PVNV)
6150 sv_upgrade(sv, SVt_NV);
6152 (void)SvNOK_only(sv);
6155 #ifdef PERL_PRESERVE_IVUV
6157 int numtype = grok_number(SvPVX(sv), SvCUR(sv), NULL);
6158 if (numtype && !(numtype & IS_NUMBER_INFINITY)) {
6159 /* Need to try really hard to see if it's an integer.
6160 9.22337203685478e+18 is an integer.
6161 but "9.22337203685478e+18" + 0 is UV=9223372036854779904
6162 so $a="9.22337203685478e+18"; $a+0; $a--
6163 needs to be the same as $a="9.22337203685478e+18"; $a--
6170 /* sv_2iv *should* have made this an NV */
6171 if (flags & SVp_NOK) {
6172 (void)SvNOK_only(sv);
6176 /* I don't think we can get here. Maybe I should assert this
6177 And if we do get here I suspect that sv_setnv will croak. NWC
6179 #if defined(USE_LONG_DOUBLE)
6180 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",
6181 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
6183 DEBUG_c(PerlIO_printf(Perl_debug_log,"sv_dec punt failed to convert '%s' to IOK or NOKp, UV=0x%"UVxf" NV=%"NVgf"\n",
6184 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
6188 #endif /* PERL_PRESERVE_IVUV */
6189 sv_setnv(sv,Atof(SvPVX(sv)) - 1.0); /* punt */
6193 =for apidoc sv_mortalcopy
6195 Creates a new SV which is a copy of the original SV (using C<sv_setsv>).
6196 The new SV is marked as mortal. It will be destroyed "soon", either by an
6197 explicit call to FREETMPS, or by an implicit call at places such as
6198 statement boundaries. See also C<sv_newmortal> and C<sv_2mortal>.
6203 /* Make a string that will exist for the duration of the expression
6204 * evaluation. Actually, it may have to last longer than that, but
6205 * hopefully we won't free it until it has been assigned to a
6206 * permanent location. */
6209 Perl_sv_mortalcopy(pTHX_ SV *oldstr)
6214 sv_setsv(sv,oldstr);
6216 PL_tmps_stack[++PL_tmps_ix] = sv;
6222 =for apidoc sv_newmortal
6224 Creates a new null SV which is mortal. The reference count of the SV is
6225 set to 1. It will be destroyed "soon", either by an explicit call to
6226 FREETMPS, or by an implicit call at places such as statement boundaries.
6227 See also C<sv_mortalcopy> and C<sv_2mortal>.
6233 Perl_sv_newmortal(pTHX)
6238 SvFLAGS(sv) = SVs_TEMP;
6240 PL_tmps_stack[++PL_tmps_ix] = sv;
6245 =for apidoc sv_2mortal
6247 Marks an existing SV as mortal. The SV will be destroyed "soon", either
6248 by an explicit call to FREETMPS, or by an implicit call at places such as
6249 statement boundaries. See also C<sv_newmortal> and C<sv_mortalcopy>.
6255 Perl_sv_2mortal(pTHX_ register SV *sv)
6259 if (SvREADONLY(sv) && SvIMMORTAL(sv))
6262 PL_tmps_stack[++PL_tmps_ix] = sv;
6270 Creates a new SV and copies a string into it. The reference count for the
6271 SV is set to 1. If C<len> is zero, Perl will compute the length using
6272 strlen(). For efficiency, consider using C<newSVpvn> instead.
6278 Perl_newSVpv(pTHX_ const char *s, STRLEN len)
6285 sv_setpvn(sv,s,len);
6290 =for apidoc newSVpvn
6292 Creates a new SV and copies a string into it. The reference count for the
6293 SV is set to 1. Note that if C<len> is zero, Perl will create a zero length
6294 string. You are responsible for ensuring that the source string is at least
6301 Perl_newSVpvn(pTHX_ const char *s, STRLEN len)
6306 sv_setpvn(sv,s,len);
6311 =for apidoc newSVpvn_share
6313 Creates a new SV with its SvPVX pointing to a shared string in the string
6314 table. If the string does not already exist in the table, it is created
6315 first. Turns on READONLY and FAKE. The string's hash is stored in the UV
6316 slot of the SV; if the C<hash> parameter is non-zero, that value is used;
6317 otherwise the hash is computed. The idea here is that as the string table
6318 is used for shared hash keys these strings will have SvPVX == HeKEY and
6319 hash lookup will avoid string compare.
6325 Perl_newSVpvn_share(pTHX_ const char *src, I32 len, U32 hash)
6328 bool is_utf8 = FALSE;
6330 STRLEN tmplen = -len;
6332 /* See the note in hv.c:hv_fetch() --jhi */
6333 src = (char*)bytes_from_utf8((U8*)src, &tmplen, &is_utf8);
6337 PERL_HASH(hash, src, len);
6339 sv_upgrade(sv, SVt_PVIV);
6340 SvPVX(sv) = sharepvn(src, is_utf8?-len:len, hash);
6353 #if defined(PERL_IMPLICIT_CONTEXT)
6355 /* pTHX_ magic can't cope with varargs, so this is a no-context
6356 * version of the main function, (which may itself be aliased to us).
6357 * Don't access this version directly.
6361 Perl_newSVpvf_nocontext(const char* pat, ...)
6366 va_start(args, pat);
6367 sv = vnewSVpvf(pat, &args);
6374 =for apidoc newSVpvf
6376 Creates a new SV and initializes it with the string formatted like
6383 Perl_newSVpvf(pTHX_ const char* pat, ...)
6387 va_start(args, pat);
6388 sv = vnewSVpvf(pat, &args);
6393 /* backend for newSVpvf() and newSVpvf_nocontext() */
6396 Perl_vnewSVpvf(pTHX_ const char* pat, va_list* args)
6400 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
6407 Creates a new SV and copies a floating point value into it.
6408 The reference count for the SV is set to 1.
6414 Perl_newSVnv(pTHX_ NV n)
6426 Creates a new SV and copies an integer into it. The reference count for the
6433 Perl_newSViv(pTHX_ IV i)
6445 Creates a new SV and copies an unsigned integer into it.
6446 The reference count for the SV is set to 1.
6452 Perl_newSVuv(pTHX_ UV u)
6462 =for apidoc newRV_noinc
6464 Creates an RV wrapper for an SV. The reference count for the original
6465 SV is B<not> incremented.
6471 Perl_newRV_noinc(pTHX_ SV *tmpRef)
6476 sv_upgrade(sv, SVt_RV);
6483 /* newRV_inc is the official function name to use now.
6484 * newRV_inc is in fact #defined to newRV in sv.h
6488 Perl_newRV(pTHX_ SV *tmpRef)
6490 return newRV_noinc(SvREFCNT_inc(tmpRef));
6496 Creates a new SV which is an exact duplicate of the original SV.
6503 Perl_newSVsv(pTHX_ register SV *old)
6509 if (SvTYPE(old) == SVTYPEMASK) {
6510 if (ckWARN_d(WARN_INTERNAL))
6511 Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "semi-panic: attempt to dup freed string");
6526 =for apidoc sv_reset
6528 Underlying implementation for the C<reset> Perl function.
6529 Note that the perl-level function is vaguely deprecated.
6535 Perl_sv_reset(pTHX_ register char *s, HV *stash)
6543 char todo[PERL_UCHAR_MAX+1];
6548 if (!*s) { /* reset ?? searches */
6549 for (pm = HvPMROOT(stash); pm; pm = pm->op_pmnext) {
6550 pm->op_pmdynflags &= ~PMdf_USED;
6555 /* reset variables */
6557 if (!HvARRAY(stash))
6560 Zero(todo, 256, char);
6562 i = (unsigned char)*s;
6566 max = (unsigned char)*s++;
6567 for ( ; i <= max; i++) {
6570 for (i = 0; i <= (I32) HvMAX(stash); i++) {
6571 for (entry = HvARRAY(stash)[i];
6573 entry = HeNEXT(entry))
6575 if (!todo[(U8)*HeKEY(entry)])
6577 gv = (GV*)HeVAL(entry);
6579 if (SvTHINKFIRST(sv)) {
6580 if (!SvREADONLY(sv) && SvROK(sv))
6585 if (SvTYPE(sv) >= SVt_PV) {
6587 if (SvPVX(sv) != Nullch)
6594 if (GvHV(gv) && !HvNAME(GvHV(gv))) {
6596 #ifdef USE_ENVIRON_ARRAY
6598 environ[0] = Nullch;
6609 Using various gambits, try to get an IO from an SV: the IO slot if its a
6610 GV; or the recursive result if we're an RV; or the IO slot of the symbol
6611 named after the PV if we're a string.
6617 Perl_sv_2io(pTHX_ SV *sv)
6623 switch (SvTYPE(sv)) {
6631 Perl_croak(aTHX_ "Bad filehandle: %s", GvNAME(gv));
6635 Perl_croak(aTHX_ PL_no_usym, "filehandle");
6637 return sv_2io(SvRV(sv));
6638 gv = gv_fetchpv(SvPV(sv,n_a), FALSE, SVt_PVIO);
6644 Perl_croak(aTHX_ "Bad filehandle: %s", SvPV(sv,n_a));
6653 Using various gambits, try to get a CV from an SV; in addition, try if
6654 possible to set C<*st> and C<*gvp> to the stash and GV associated with it.
6660 Perl_sv_2cv(pTHX_ SV *sv, HV **st, GV **gvp, I32 lref)
6667 return *gvp = Nullgv, Nullcv;
6668 switch (SvTYPE(sv)) {
6687 SV **sp = &sv; /* Used in tryAMAGICunDEREF macro. */
6688 tryAMAGICunDEREF(to_cv);
6691 if (SvTYPE(sv) == SVt_PVCV) {
6700 Perl_croak(aTHX_ "Not a subroutine reference");
6705 gv = gv_fetchpv(SvPV(sv, n_a), lref, SVt_PVCV);
6711 if (lref && !GvCVu(gv)) {
6714 tmpsv = NEWSV(704,0);
6715 gv_efullname3(tmpsv, gv, Nullch);
6716 /* XXX this is probably not what they think they're getting.
6717 * It has the same effect as "sub name;", i.e. just a forward
6719 newSUB(start_subparse(FALSE, 0),
6720 newSVOP(OP_CONST, 0, tmpsv),
6725 Perl_croak(aTHX_ "Unable to create sub named \"%s\"", SvPV(sv,n_a));
6734 Returns true if the SV has a true value by Perl's rules.
6735 Use the C<SvTRUE> macro instead, which may call C<sv_true()> or may
6736 instead use an in-line version.
6742 Perl_sv_true(pTHX_ register SV *sv)
6748 if ((tXpv = (XPV*)SvANY(sv)) &&
6749 (tXpv->xpv_cur > 1 ||
6750 (tXpv->xpv_cur && *tXpv->xpv_pv != '0')))
6757 return SvIVX(sv) != 0;
6760 return SvNVX(sv) != 0.0;
6762 return sv_2bool(sv);
6770 A private implementation of the C<SvIVx> macro for compilers which can't
6771 cope with complex macro expressions. Always use the macro instead.
6777 Perl_sv_iv(pTHX_ register SV *sv)
6781 return (IV)SvUVX(sv);
6790 A private implementation of the C<SvUVx> macro for compilers which can't
6791 cope with complex macro expressions. Always use the macro instead.
6797 Perl_sv_uv(pTHX_ register SV *sv)
6802 return (UV)SvIVX(sv);
6810 A private implementation of the C<SvNVx> macro for compilers which can't
6811 cope with complex macro expressions. Always use the macro instead.
6817 Perl_sv_nv(pTHX_ register SV *sv)
6827 Use the C<SvPV_nolen> macro instead
6831 A private implementation of the C<SvPV> macro for compilers which can't
6832 cope with complex macro expressions. Always use the macro instead.
6838 Perl_sv_pvn(pTHX_ SV *sv, STRLEN *lp)
6844 return sv_2pv(sv, lp);
6849 Perl_sv_pvn_nomg(pTHX_ register SV *sv, STRLEN *lp)
6855 return sv_2pv_flags(sv, lp, 0);
6859 =for apidoc sv_pvn_force
6861 Get a sensible string out of the SV somehow.
6862 A private implementation of the C<SvPV_force> macro for compilers which
6863 can't cope with complex macro expressions. Always use the macro instead.
6865 =for apidoc sv_pvn_force_flags
6867 Get a sensible string out of the SV somehow.
6868 If C<flags> has C<SV_GMAGIC> bit set, will C<mg_get> on C<sv> if
6869 appropriate, else not. C<sv_pvn_force> and C<sv_pvn_force_nomg> are
6870 implemented in terms of this function.
6871 You normally want to use the various wrapper macros instead: see
6872 C<SvPV_force> and C<SvPV_force_nomg>
6878 Perl_sv_pvn_force_flags(pTHX_ SV *sv, STRLEN *lp, I32 flags)
6882 if (SvTHINKFIRST(sv) && !SvROK(sv))
6883 sv_force_normal(sv);
6889 if (SvTYPE(sv) > SVt_PVLV && SvTYPE(sv) != SVt_PVFM) {
6890 Perl_croak(aTHX_ "Can't coerce %s to string in %s", sv_reftype(sv,0),
6894 s = sv_2pv_flags(sv, lp, flags);
6895 if (s != SvPVX(sv)) { /* Almost, but not quite, sv_setpvn() */
6900 (void)SvUPGRADE(sv, SVt_PV); /* Never FALSE */
6901 SvGROW(sv, len + 1);
6902 Move(s,SvPVX(sv),len,char);
6907 SvPOK_on(sv); /* validate pointer */
6909 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2pv(%s)\n",
6910 PTR2UV(sv),SvPVX(sv)));
6917 =for apidoc sv_pvbyte
6919 Use C<SvPVbyte_nolen> instead.
6921 =for apidoc sv_pvbyten
6923 A private implementation of the C<SvPVbyte> macro for compilers
6924 which can't cope with complex macro expressions. Always use the macro
6931 Perl_sv_pvbyten(pTHX_ SV *sv, STRLEN *lp)
6933 sv_utf8_downgrade(sv,0);
6934 return sv_pvn(sv,lp);
6938 =for apidoc sv_pvbyten_force
6940 A private implementation of the C<SvPVbytex_force> macro for compilers
6941 which can't cope with complex macro expressions. Always use the macro
6948 Perl_sv_pvbyten_force(pTHX_ SV *sv, STRLEN *lp)
6950 sv_utf8_downgrade(sv,0);
6951 return sv_pvn_force(sv,lp);
6955 =for apidoc sv_pvutf8
6957 Use the C<SvPVutf8_nolen> macro instead
6959 =for apidoc sv_pvutf8n
6961 A private implementation of the C<SvPVutf8> macro for compilers
6962 which can't cope with complex macro expressions. Always use the macro
6969 Perl_sv_pvutf8n(pTHX_ SV *sv, STRLEN *lp)
6971 sv_utf8_upgrade(sv);
6972 return sv_pvn(sv,lp);
6976 =for apidoc sv_pvutf8n_force
6978 A private implementation of the C<SvPVutf8_force> macro for compilers
6979 which can't cope with complex macro expressions. Always use the macro
6986 Perl_sv_pvutf8n_force(pTHX_ SV *sv, STRLEN *lp)
6988 sv_utf8_upgrade(sv);
6989 return sv_pvn_force(sv,lp);
6993 =for apidoc sv_reftype
6995 Returns a string describing what the SV is a reference to.
7001 Perl_sv_reftype(pTHX_ SV *sv, int ob)
7003 if (ob && SvOBJECT(sv)) {
7004 HV *svs = SvSTASH(sv);
7005 /* [20011101.072] This bandaid for C<package;> should eventually
7006 be removed. AMS 20011103 */
7007 return (svs ? HvNAME(svs) : "<none>");
7010 switch (SvTYPE(sv)) {
7024 case SVt_PVLV: return "LVALUE";
7025 case SVt_PVAV: return "ARRAY";
7026 case SVt_PVHV: return "HASH";
7027 case SVt_PVCV: return "CODE";
7028 case SVt_PVGV: return "GLOB";
7029 case SVt_PVFM: return "FORMAT";
7030 case SVt_PVIO: return "IO";
7031 default: return "UNKNOWN";
7037 =for apidoc sv_isobject
7039 Returns a boolean indicating whether the SV is an RV pointing to a blessed
7040 object. If the SV is not an RV, or if the object is not blessed, then this
7047 Perl_sv_isobject(pTHX_ SV *sv)
7064 Returns a boolean indicating whether the SV is blessed into the specified
7065 class. This does not check for subtypes; use C<sv_derived_from> to verify
7066 an inheritance relationship.
7072 Perl_sv_isa(pTHX_ SV *sv, const char *name)
7084 return strEQ(HvNAME(SvSTASH(sv)), name);
7090 Creates a new SV for the RV, C<rv>, to point to. If C<rv> is not an RV then
7091 it will be upgraded to one. If C<classname> is non-null then the new SV will
7092 be blessed in the specified package. The new SV is returned and its
7093 reference count is 1.
7099 Perl_newSVrv(pTHX_ SV *rv, const char *classname)
7105 SV_CHECK_THINKFIRST(rv);
7108 if (SvTYPE(rv) >= SVt_PVMG) {
7109 U32 refcnt = SvREFCNT(rv);
7113 SvREFCNT(rv) = refcnt;
7116 if (SvTYPE(rv) < SVt_RV)
7117 sv_upgrade(rv, SVt_RV);
7118 else if (SvTYPE(rv) > SVt_RV) {
7119 (void)SvOOK_off(rv);
7120 if (SvPVX(rv) && SvLEN(rv))
7121 Safefree(SvPVX(rv));
7131 HV* stash = gv_stashpv(classname, TRUE);
7132 (void)sv_bless(rv, stash);
7138 =for apidoc sv_setref_pv
7140 Copies a pointer into a new SV, optionally blessing the SV. The C<rv>
7141 argument will be upgraded to an RV. That RV will be modified to point to
7142 the new SV. If the C<pv> argument is NULL then C<PL_sv_undef> will be placed
7143 into the SV. The C<classname> argument indicates the package for the
7144 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
7145 will be returned and will have a reference count of 1.
7147 Do not use with other Perl types such as HV, AV, SV, CV, because those
7148 objects will become corrupted by the pointer copy process.
7150 Note that C<sv_setref_pvn> copies the string while this copies the pointer.
7156 Perl_sv_setref_pv(pTHX_ SV *rv, const char *classname, void *pv)
7159 sv_setsv(rv, &PL_sv_undef);
7163 sv_setiv(newSVrv(rv,classname), PTR2IV(pv));
7168 =for apidoc sv_setref_iv
7170 Copies an integer into a new SV, optionally blessing the SV. The C<rv>
7171 argument will be upgraded to an RV. That RV will be modified to point to
7172 the new SV. The C<classname> argument indicates the package for the
7173 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
7174 will be returned and will have a reference count of 1.
7180 Perl_sv_setref_iv(pTHX_ SV *rv, const char *classname, IV iv)
7182 sv_setiv(newSVrv(rv,classname), iv);
7187 =for apidoc sv_setref_uv
7189 Copies an unsigned integer into a new SV, optionally blessing the SV. The C<rv>
7190 argument will be upgraded to an RV. That RV will be modified to point to
7191 the new SV. The C<classname> argument indicates the package for the
7192 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
7193 will be returned and will have a reference count of 1.
7199 Perl_sv_setref_uv(pTHX_ SV *rv, const char *classname, UV uv)
7201 sv_setuv(newSVrv(rv,classname), uv);
7206 =for apidoc sv_setref_nv
7208 Copies a double into a new SV, optionally blessing the SV. The C<rv>
7209 argument will be upgraded to an RV. That RV will be modified to point to
7210 the new SV. The C<classname> argument indicates the package for the
7211 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
7212 will be returned and will have a reference count of 1.
7218 Perl_sv_setref_nv(pTHX_ SV *rv, const char *classname, NV nv)
7220 sv_setnv(newSVrv(rv,classname), nv);
7225 =for apidoc sv_setref_pvn
7227 Copies a string into a new SV, optionally blessing the SV. The length of the
7228 string must be specified with C<n>. The C<rv> argument will be upgraded to
7229 an RV. That RV will be modified to point to the new SV. The C<classname>
7230 argument indicates the package for the blessing. Set C<classname> to
7231 C<Nullch> to avoid the blessing. The new SV will be returned and will have
7232 a reference count of 1.
7234 Note that C<sv_setref_pv> copies the pointer while this copies the string.
7240 Perl_sv_setref_pvn(pTHX_ SV *rv, const char *classname, char *pv, STRLEN n)
7242 sv_setpvn(newSVrv(rv,classname), pv, n);
7247 =for apidoc sv_bless
7249 Blesses an SV into a specified package. The SV must be an RV. The package
7250 must be designated by its stash (see C<gv_stashpv()>). The reference count
7251 of the SV is unaffected.
7257 Perl_sv_bless(pTHX_ SV *sv, HV *stash)
7261 Perl_croak(aTHX_ "Can't bless non-reference value");
7263 if (SvFLAGS(tmpRef) & (SVs_OBJECT|SVf_READONLY)) {
7264 if (SvREADONLY(tmpRef))
7265 Perl_croak(aTHX_ PL_no_modify);
7266 if (SvOBJECT(tmpRef)) {
7267 if (SvTYPE(tmpRef) != SVt_PVIO)
7269 SvREFCNT_dec(SvSTASH(tmpRef));
7272 SvOBJECT_on(tmpRef);
7273 if (SvTYPE(tmpRef) != SVt_PVIO)
7275 (void)SvUPGRADE(tmpRef, SVt_PVMG);
7276 SvSTASH(tmpRef) = (HV*)SvREFCNT_inc(stash);
7283 if(SvSMAGICAL(tmpRef))
7284 if(mg_find(tmpRef, PERL_MAGIC_ext) || mg_find(tmpRef, PERL_MAGIC_uvar))
7292 /* Downgrades a PVGV to a PVMG.
7294 * XXX This function doesn't actually appear to be used anywhere
7299 S_sv_unglob(pTHX_ SV *sv)
7303 assert(SvTYPE(sv) == SVt_PVGV);
7308 SvREFCNT_dec(GvSTASH(sv));
7309 GvSTASH(sv) = Nullhv;
7311 sv_unmagic(sv, PERL_MAGIC_glob);
7312 Safefree(GvNAME(sv));
7315 /* need to keep SvANY(sv) in the right arena */
7316 xpvmg = new_XPVMG();
7317 StructCopy(SvANY(sv), xpvmg, XPVMG);
7318 del_XPVGV(SvANY(sv));
7321 SvFLAGS(sv) &= ~SVTYPEMASK;
7322 SvFLAGS(sv) |= SVt_PVMG;
7326 =for apidoc sv_unref_flags
7328 Unsets the RV status of the SV, and decrements the reference count of
7329 whatever was being referenced by the RV. This can almost be thought of
7330 as a reversal of C<newSVrv>. The C<cflags> argument can contain
7331 C<SV_IMMEDIATE_UNREF> to force the reference count to be decremented
7332 (otherwise the decrementing is conditional on the reference count being
7333 different from one or the reference being a readonly SV).
7340 Perl_sv_unref_flags(pTHX_ SV *sv, U32 flags)
7344 if (SvWEAKREF(sv)) {
7352 if (SvREFCNT(rv) != 1 || SvREADONLY(rv) || flags) /* SV_IMMEDIATE_UNREF */
7354 else /* XXX Hack, but hard to make $a=$a->[1] work otherwise */
7355 sv_2mortal(rv); /* Schedule for freeing later */
7359 =for apidoc sv_unref
7361 Unsets the RV status of the SV, and decrements the reference count of
7362 whatever was being referenced by the RV. This can almost be thought of
7363 as a reversal of C<newSVrv>. This is C<sv_unref_flags> with the C<flag>
7364 being zero. See C<SvROK_off>.
7370 Perl_sv_unref(pTHX_ SV *sv)
7372 sv_unref_flags(sv, 0);
7376 =for apidoc sv_taint
7378 Taint an SV. Use C<SvTAINTED_on> instead.
7383 Perl_sv_taint(pTHX_ SV *sv)
7385 sv_magic((sv), Nullsv, PERL_MAGIC_taint, Nullch, 0);
7389 =for apidoc sv_untaint
7391 Untaint an SV. Use C<SvTAINTED_off> instead.
7396 Perl_sv_untaint(pTHX_ SV *sv)
7398 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) {
7399 MAGIC *mg = mg_find(sv, PERL_MAGIC_taint);
7406 =for apidoc sv_tainted
7408 Test an SV for taintedness. Use C<SvTAINTED> instead.
7413 Perl_sv_tainted(pTHX_ SV *sv)
7415 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) {
7416 MAGIC *mg = mg_find(sv, PERL_MAGIC_taint);
7417 if (mg && ((mg->mg_len & 1) || ((mg->mg_len & 2) && mg->mg_obj == sv)))
7424 =for apidoc sv_setpviv
7426 Copies an integer into the given SV, also updating its string value.
7427 Does not handle 'set' magic. See C<sv_setpviv_mg>.
7433 Perl_sv_setpviv(pTHX_ SV *sv, IV iv)
7435 char buf[TYPE_CHARS(UV)];
7437 char *ptr = uiv_2buf(buf, iv, 0, 0, &ebuf);
7439 sv_setpvn(sv, ptr, ebuf - ptr);
7443 =for apidoc sv_setpviv_mg
7445 Like C<sv_setpviv>, but also handles 'set' magic.
7451 Perl_sv_setpviv_mg(pTHX_ SV *sv, IV iv)
7453 char buf[TYPE_CHARS(UV)];
7455 char *ptr = uiv_2buf(buf, iv, 0, 0, &ebuf);
7457 sv_setpvn(sv, ptr, ebuf - ptr);
7461 #if defined(PERL_IMPLICIT_CONTEXT)
7463 /* pTHX_ magic can't cope with varargs, so this is a no-context
7464 * version of the main function, (which may itself be aliased to us).
7465 * Don't access this version directly.
7469 Perl_sv_setpvf_nocontext(SV *sv, const char* pat, ...)
7473 va_start(args, pat);
7474 sv_vsetpvf(sv, pat, &args);
7478 /* pTHX_ magic can't cope with varargs, so this is a no-context
7479 * version of the main function, (which may itself be aliased to us).
7480 * Don't access this version directly.
7484 Perl_sv_setpvf_mg_nocontext(SV *sv, const char* pat, ...)
7488 va_start(args, pat);
7489 sv_vsetpvf_mg(sv, pat, &args);
7495 =for apidoc sv_setpvf
7497 Processes its arguments like C<sprintf> and sets an SV to the formatted
7498 output. Does not handle 'set' magic. See C<sv_setpvf_mg>.
7504 Perl_sv_setpvf(pTHX_ SV *sv, const char* pat, ...)
7507 va_start(args, pat);
7508 sv_vsetpvf(sv, pat, &args);
7512 /* backend for C<sv_setpvf> and C<sv_setpvf_nocontext> */
7515 Perl_sv_vsetpvf(pTHX_ SV *sv, const char* pat, va_list* args)
7517 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
7521 =for apidoc sv_setpvf_mg
7523 Like C<sv_setpvf>, but also handles 'set' magic.
7529 Perl_sv_setpvf_mg(pTHX_ SV *sv, const char* pat, ...)
7532 va_start(args, pat);
7533 sv_vsetpvf_mg(sv, pat, &args);
7537 /* backend for C<sv_setpvf_mg> C<setpvf_mg_nocontext> */
7540 Perl_sv_vsetpvf_mg(pTHX_ SV *sv, const char* pat, va_list* args)
7542 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
7546 #if defined(PERL_IMPLICIT_CONTEXT)
7548 /* pTHX_ magic can't cope with varargs, so this is a no-context
7549 * version of the main function, (which may itself be aliased to us).
7550 * Don't access this version directly.
7554 Perl_sv_catpvf_nocontext(SV *sv, const char* pat, ...)
7558 va_start(args, pat);
7559 sv_vcatpvf(sv, pat, &args);
7563 /* pTHX_ magic can't cope with varargs, so this is a no-context
7564 * version of the main function, (which may itself be aliased to us).
7565 * Don't access this version directly.
7569 Perl_sv_catpvf_mg_nocontext(SV *sv, const char* pat, ...)
7573 va_start(args, pat);
7574 sv_vcatpvf_mg(sv, pat, &args);
7580 =for apidoc sv_catpvf
7582 Processes its arguments like C<sprintf> and appends the formatted
7583 output to an SV. If the appended data contains "wide" characters
7584 (including, but not limited to, SVs with a UTF-8 PV formatted with %s,
7585 and characters >255 formatted with %c), the original SV might get
7586 upgraded to UTF-8. Handles 'get' magic, but not 'set' magic.
7587 C<SvSETMAGIC()> must typically be called after calling this function
7588 to handle 'set' magic.
7593 Perl_sv_catpvf(pTHX_ SV *sv, const char* pat, ...)
7596 va_start(args, pat);
7597 sv_vcatpvf(sv, pat, &args);
7601 /* backend for C<sv_catpvf> and C<catpvf_mg_nocontext> */
7604 Perl_sv_vcatpvf(pTHX_ SV *sv, const char* pat, va_list* args)
7606 sv_vcatpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
7610 =for apidoc sv_catpvf_mg
7612 Like C<sv_catpvf>, but also handles 'set' magic.
7618 Perl_sv_catpvf_mg(pTHX_ SV *sv, const char* pat, ...)
7621 va_start(args, pat);
7622 sv_vcatpvf_mg(sv, pat, &args);
7626 /* backend for C<catpvf_mg> and C<catpvf_mg_nocontext> */
7629 Perl_sv_vcatpvf_mg(pTHX_ SV *sv, const char* pat, va_list* args)
7631 sv_vcatpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
7636 =for apidoc sv_vsetpvfn
7638 Works like C<vcatpvfn> but copies the text into the SV instead of
7641 Usually used via one of its frontends C<sv_setpvf> and C<sv_setpvf_mg>.
7647 Perl_sv_vsetpvfn(pTHX_ SV *sv, const char *pat, STRLEN patlen, va_list *args, SV **svargs, I32 svmax, bool *maybe_tainted)
7649 sv_setpvn(sv, "", 0);
7650 sv_vcatpvfn(sv, pat, patlen, args, svargs, svmax, maybe_tainted);
7653 /* private function for use in sv_vcatpvfn via the EXPECT_NUMBER macro */
7656 S_expect_number(pTHX_ char** pattern)
7659 switch (**pattern) {
7660 case '1': case '2': case '3':
7661 case '4': case '5': case '6':
7662 case '7': case '8': case '9':
7663 while (isDIGIT(**pattern))
7664 var = var * 10 + (*(*pattern)++ - '0');
7668 #define EXPECT_NUMBER(pattern, var) (var = S_expect_number(aTHX_ &pattern))
7671 =for apidoc sv_vcatpvfn
7673 Processes its arguments like C<vsprintf> and appends the formatted output
7674 to an SV. Uses an array of SVs if the C style variable argument list is
7675 missing (NULL). When running with taint checks enabled, indicates via
7676 C<maybe_tainted> if results are untrustworthy (often due to the use of
7679 Usually used via one of its frontends C<sv_catpvf> and C<sv_catpvf_mg>.
7685 Perl_sv_vcatpvfn(pTHX_ SV *sv, const char *pat, STRLEN patlen, va_list *args, SV **svargs, I32 svmax, bool *maybe_tainted)
7692 static char nullstr[] = "(null)";
7694 bool has_utf8 = FALSE; /* has the result utf8? */
7696 /* no matter what, this is a string now */
7697 (void)SvPV_force(sv, origlen);
7699 /* special-case "", "%s", and "%_" */
7702 if (patlen == 2 && pat[0] == '%') {
7706 char *s = va_arg(*args, char*);
7707 sv_catpv(sv, s ? s : nullstr);
7709 else if (svix < svmax) {
7710 sv_catsv(sv, *svargs);
7711 if (DO_UTF8(*svargs))
7717 argsv = va_arg(*args, SV*);
7718 sv_catsv(sv, argsv);
7723 /* See comment on '_' below */
7728 if (!args && svix < svmax && DO_UTF8(*svargs))
7731 patend = (char*)pat + patlen;
7732 for (p = (char*)pat; p < patend; p = q) {
7735 bool vectorize = FALSE;
7736 bool vectorarg = FALSE;
7737 bool vec_utf8 = FALSE;
7743 bool has_precis = FALSE;
7745 bool is_utf8 = FALSE; /* is this item utf8? */
7748 U8 utf8buf[UTF8_MAXLEN+1];
7749 STRLEN esignlen = 0;
7751 char *eptr = Nullch;
7753 /* Times 4: a decimal digit takes more than 3 binary digits.
7754 * NV_DIG: mantissa takes than many decimal digits.
7755 * Plus 32: Playing safe. */
7756 char ebuf[IV_DIG * 4 + NV_DIG + 32];
7757 /* large enough for "%#.#f" --chip */
7758 /* what about long double NVs? --jhi */
7761 U8 *vecstr = Null(U8*);
7773 STRLEN dotstrlen = 1;
7774 I32 efix = 0; /* explicit format parameter index */
7775 I32 ewix = 0; /* explicit width index */
7776 I32 epix = 0; /* explicit precision index */
7777 I32 evix = 0; /* explicit vector index */
7778 bool asterisk = FALSE;
7780 /* echo everything up to the next format specification */
7781 for (q = p; q < patend && *q != '%'; ++q) ;
7783 sv_catpvn(sv, p, q - p);
7790 We allow format specification elements in this order:
7791 \d+\$ explicit format parameter index
7793 \*?(\d+\$)?v vector with optional (optionally specified) arg
7794 \d+|\*(\d+\$)? width using optional (optionally specified) arg
7795 \.(\d*|\*(\d+\$)?) precision using optional (optionally specified) arg
7797 [%bcdefginopsux_DFOUX] format (mandatory)
7799 if (EXPECT_NUMBER(q, width)) {
7840 if (EXPECT_NUMBER(q, ewix))
7849 if ((vectorarg = asterisk)) {
7859 EXPECT_NUMBER(q, width);
7864 vecsv = va_arg(*args, SV*);
7866 vecsv = (evix ? evix <= svmax : svix < svmax) ?
7867 svargs[ewix ? ewix-1 : svix++] : &PL_sv_undef;
7868 dotstr = SvPVx(vecsv, dotstrlen);
7873 vecsv = va_arg(*args, SV*);
7874 vecstr = (U8*)SvPVx(vecsv,veclen);
7875 vec_utf8 = DO_UTF8(vecsv);
7877 else if (efix ? efix <= svmax : svix < svmax) {
7878 vecsv = svargs[efix ? efix-1 : svix++];
7879 vecstr = (U8*)SvPVx(vecsv,veclen);
7880 vec_utf8 = DO_UTF8(vecsv);
7890 i = va_arg(*args, int);
7892 i = (ewix ? ewix <= svmax : svix < svmax) ?
7893 SvIVx(svargs[ewix ? ewix-1 : svix++]) : 0;
7895 width = (i < 0) ? -i : i;
7905 if (EXPECT_NUMBER(q, epix) && *q++ != '$') /* epix currently unused */
7908 i = va_arg(*args, int);
7910 i = (ewix ? ewix <= svmax : svix < svmax)
7911 ? SvIVx(svargs[ewix ? ewix-1 : svix++]) : 0;
7912 precis = (i < 0) ? 0 : i;
7917 precis = precis * 10 + (*q++ - '0');
7926 case 'I': /* Ix, I32x, and I64x */
7928 if (q[1] == '6' && q[2] == '4') {
7934 if (q[1] == '3' && q[2] == '2') {
7944 #if defined(HAS_QUAD) || (defined(HAS_LONG_DOUBLE) && defined(USE_LONG_DOUBLE))
7955 #if defined(HAS_QUAD) || (defined(HAS_LONG_DOUBLE) && defined(USE_LONG_DOUBLE))
7956 if (*(q + 1) == 'l') { /* lld, llf */
7979 argsv = (efix ? efix <= svmax : svix < svmax) ?
7980 svargs[efix ? efix-1 : svix++] : &PL_sv_undef;
7987 uv = args ? va_arg(*args, int) : SvIVx(argsv);
7989 (!UNI_IS_INVARIANT(uv) && SvUTF8(sv)))
7991 eptr = (char*)utf8buf;
7992 elen = uvchr_to_utf8((U8*)eptr, uv) - utf8buf;
8004 eptr = va_arg(*args, char*);
8006 #ifdef MACOS_TRADITIONAL
8007 /* On MacOS, %#s format is used for Pascal strings */
8012 elen = strlen(eptr);
8015 elen = sizeof nullstr - 1;
8019 eptr = SvPVx(argsv, elen);
8020 if (DO_UTF8(argsv)) {
8021 if (has_precis && precis < elen) {
8023 sv_pos_u2b(argsv, &p, 0); /* sticks at end */
8026 if (width) { /* fudge width (can't fudge elen) */
8027 width += elen - sv_len_utf8(argsv);
8036 * The "%_" hack might have to be changed someday,
8037 * if ISO or ANSI decide to use '_' for something.
8038 * So we keep it hidden from users' code.
8042 argsv = va_arg(*args, SV*);
8043 eptr = SvPVx(argsv, elen);
8049 if (has_precis && elen > precis)
8058 uv = PTR2UV(args ? va_arg(*args, void*) : argsv);
8076 uv = utf8n_to_uvchr(vecstr, veclen, &ulen,
8085 esignbuf[esignlen++] = plus;
8089 case 'h': iv = (short)va_arg(*args, int); break;
8090 default: iv = va_arg(*args, int); break;
8091 case 'l': iv = va_arg(*args, long); break;
8092 case 'V': iv = va_arg(*args, IV); break;
8094 case 'q': iv = va_arg(*args, Quad_t); break;
8101 case 'h': iv = (short)iv; break;
8103 case 'l': iv = (long)iv; break;
8106 case 'q': iv = (Quad_t)iv; break;
8110 if ( !vectorize ) /* we already set uv above */
8115 esignbuf[esignlen++] = plus;
8119 esignbuf[esignlen++] = '-';
8162 uv = utf8n_to_uvchr(vecstr, veclen, &ulen,
8173 case 'h': uv = (unsigned short)va_arg(*args, unsigned); break;
8174 default: uv = va_arg(*args, unsigned); break;
8175 case 'l': uv = va_arg(*args, unsigned long); break;
8176 case 'V': uv = va_arg(*args, UV); break;
8178 case 'q': uv = va_arg(*args, Quad_t); break;
8185 case 'h': uv = (unsigned short)uv; break;
8187 case 'l': uv = (unsigned long)uv; break;
8190 case 'q': uv = (Quad_t)uv; break;
8196 eptr = ebuf + sizeof ebuf;
8202 p = (char*)((c == 'X')
8203 ? "0123456789ABCDEF" : "0123456789abcdef");
8209 esignbuf[esignlen++] = '0';
8210 esignbuf[esignlen++] = c; /* 'x' or 'X' */
8216 *--eptr = '0' + dig;
8218 if (alt && *eptr != '0')
8224 *--eptr = '0' + dig;
8227 esignbuf[esignlen++] = '0';
8228 esignbuf[esignlen++] = 'b';
8231 default: /* it had better be ten or less */
8232 #if defined(PERL_Y2KWARN)
8233 if (ckWARN(WARN_Y2K)) {
8235 char *s = SvPV(sv,n);
8236 if (n >= 2 && s[n-2] == '1' && s[n-1] == '9'
8237 && (n == 2 || !isDIGIT(s[n-3])))
8239 Perl_warner(aTHX_ packWARN(WARN_Y2K),
8240 "Possible Y2K bug: %%%c %s",
8241 c, "format string following '19'");
8247 *--eptr = '0' + dig;
8248 } while (uv /= base);
8251 elen = (ebuf + sizeof ebuf) - eptr;
8254 zeros = precis - elen;
8255 else if (precis == 0 && elen == 1 && *eptr == '0')
8260 /* FLOATING POINT */
8263 c = 'f'; /* maybe %F isn't supported here */
8269 /* This is evil, but floating point is even more evil */
8272 nv = args ? va_arg(*args, NV) : SvNVx(argsv);
8275 if (c != 'e' && c != 'E') {
8277 (void)Perl_frexp(nv, &i);
8278 if (i == PERL_INT_MIN)
8279 Perl_die(aTHX_ "panic: frexp");
8281 need = BIT_DIGITS(i);
8283 need += has_precis ? precis : 6; /* known default */
8287 need += 20; /* fudge factor */
8288 if (PL_efloatsize < need) {
8289 Safefree(PL_efloatbuf);
8290 PL_efloatsize = need + 20; /* more fudge */
8291 New(906, PL_efloatbuf, PL_efloatsize, char);
8292 PL_efloatbuf[0] = '\0';
8295 eptr = ebuf + sizeof ebuf;
8298 #if defined(USE_LONG_DOUBLE) && defined(PERL_PRIfldbl)
8300 /* Copy the one or more characters in a long double
8301 * format before the 'base' ([efgEFG]) character to
8302 * the format string. */
8303 static char const prifldbl[] = PERL_PRIfldbl;
8304 char const *p = prifldbl + sizeof(prifldbl) - 3;
8305 while (p >= prifldbl) { *--eptr = *p--; }
8310 do { *--eptr = '0' + (base % 10); } while (base /= 10);
8315 do { *--eptr = '0' + (base % 10); } while (base /= 10);
8327 /* No taint. Otherwise we are in the strange situation
8328 * where printf() taints but print($float) doesn't.
8330 (void)sprintf(PL_efloatbuf, eptr, nv);
8332 eptr = PL_efloatbuf;
8333 elen = strlen(PL_efloatbuf);
8340 i = SvCUR(sv) - origlen;
8343 case 'h': *(va_arg(*args, short*)) = i; break;
8344 default: *(va_arg(*args, int*)) = i; break;
8345 case 'l': *(va_arg(*args, long*)) = i; break;
8346 case 'V': *(va_arg(*args, IV*)) = i; break;
8348 case 'q': *(va_arg(*args, Quad_t*)) = i; break;
8353 sv_setuv_mg(argsv, (UV)i);
8354 continue; /* not "break" */
8361 if (!args && ckWARN(WARN_PRINTF) &&
8362 (PL_op->op_type == OP_PRTF || PL_op->op_type == OP_SPRINTF)) {
8363 SV *msg = sv_newmortal();
8364 Perl_sv_setpvf(aTHX_ msg, "Invalid conversion in %s: ",
8365 (PL_op->op_type == OP_PRTF) ? "printf" : "sprintf");
8368 Perl_sv_catpvf(aTHX_ msg,
8369 "\"%%%c\"", c & 0xFF);
8371 Perl_sv_catpvf(aTHX_ msg,
8372 "\"%%\\%03"UVof"\"",
8375 sv_catpv(msg, "end of string");
8376 Perl_warner(aTHX_ packWARN(WARN_PRINTF), "%"SVf, msg); /* yes, this is reentrant */
8379 /* output mangled stuff ... */
8385 /* ... right here, because formatting flags should not apply */
8386 SvGROW(sv, SvCUR(sv) + elen + 1);
8388 Copy(eptr, p, elen, char);
8391 SvCUR(sv) = p - SvPVX(sv);
8392 continue; /* not "break" */
8395 if (is_utf8 != has_utf8) {
8398 sv_utf8_upgrade(sv);
8401 SV *nsv = sv_2mortal(newSVpvn(eptr, elen));
8402 sv_utf8_upgrade(nsv);
8406 SvGROW(sv, SvCUR(sv) + elen + 1);
8411 have = esignlen + zeros + elen;
8412 need = (have > width ? have : width);
8415 SvGROW(sv, SvCUR(sv) + need + dotstrlen + 1);
8417 if (esignlen && fill == '0') {
8418 for (i = 0; i < (int)esignlen; i++)
8422 memset(p, fill, gap);
8425 if (esignlen && fill != '0') {
8426 for (i = 0; i < (int)esignlen; i++)
8430 for (i = zeros; i; i--)
8434 Copy(eptr, p, elen, char);
8438 memset(p, ' ', gap);
8443 Copy(dotstr, p, dotstrlen, char);
8447 vectorize = FALSE; /* done iterating over vecstr */
8454 SvCUR(sv) = p - SvPVX(sv);
8462 /* =========================================================================
8464 =head1 Cloning an interpreter
8466 All the macros and functions in this section are for the private use of
8467 the main function, perl_clone().
8469 The foo_dup() functions make an exact copy of an existing foo thinngy.
8470 During the course of a cloning, a hash table is used to map old addresses
8471 to new addresses. The table is created and manipulated with the
8472 ptr_table_* functions.
8476 ============================================================================*/
8479 #if defined(USE_ITHREADS)
8481 #if defined(USE_5005THREADS)
8482 # include "error: USE_5005THREADS and USE_ITHREADS are incompatible"
8485 #ifndef GpREFCNT_inc
8486 # define GpREFCNT_inc(gp) ((gp) ? (++(gp)->gp_refcnt, (gp)) : (GP*)NULL)
8490 #define sv_dup_inc(s,t) SvREFCNT_inc(sv_dup(s,t))
8491 #define av_dup(s,t) (AV*)sv_dup((SV*)s,t)
8492 #define av_dup_inc(s,t) (AV*)SvREFCNT_inc(sv_dup((SV*)s,t))
8493 #define hv_dup(s,t) (HV*)sv_dup((SV*)s,t)
8494 #define hv_dup_inc(s,t) (HV*)SvREFCNT_inc(sv_dup((SV*)s,t))
8495 #define cv_dup(s,t) (CV*)sv_dup((SV*)s,t)
8496 #define cv_dup_inc(s,t) (CV*)SvREFCNT_inc(sv_dup((SV*)s,t))
8497 #define io_dup(s,t) (IO*)sv_dup((SV*)s,t)
8498 #define io_dup_inc(s,t) (IO*)SvREFCNT_inc(sv_dup((SV*)s,t))
8499 #define gv_dup(s,t) (GV*)sv_dup((SV*)s,t)
8500 #define gv_dup_inc(s,t) (GV*)SvREFCNT_inc(sv_dup((SV*)s,t))
8501 #define SAVEPV(p) (p ? savepv(p) : Nullch)
8502 #define SAVEPVN(p,n) (p ? savepvn(p,n) : Nullch)
8505 /* Duplicate a regexp. Required reading: pregcomp() and pregfree() in
8506 regcomp.c. AMS 20010712 */
8509 Perl_re_dup(pTHX_ REGEXP *r, CLONE_PARAMS *param)
8513 struct reg_substr_datum *s;
8516 return (REGEXP *)NULL;
8518 if ((ret = (REGEXP *)ptr_table_fetch(PL_ptr_table, r)))
8521 len = r->offsets[0];
8522 npar = r->nparens+1;
8524 Newc(0, ret, sizeof(regexp) + (len+1)*sizeof(regnode), char, regexp);
8525 Copy(r->program, ret->program, len+1, regnode);
8527 New(0, ret->startp, npar, I32);
8528 Copy(r->startp, ret->startp, npar, I32);
8529 New(0, ret->endp, npar, I32);
8530 Copy(r->startp, ret->startp, npar, I32);
8532 New(0, ret->substrs, 1, struct reg_substr_data);
8533 for (s = ret->substrs->data, i = 0; i < 3; i++, s++) {
8534 s->min_offset = r->substrs->data[i].min_offset;
8535 s->max_offset = r->substrs->data[i].max_offset;
8536 s->substr = sv_dup_inc(r->substrs->data[i].substr, param);
8537 s->utf8_substr = sv_dup_inc(r->substrs->data[i].utf8_substr, param);
8540 ret->regstclass = NULL;
8543 int count = r->data->count;
8545 Newc(0, d, sizeof(struct reg_data) + count*sizeof(void *),
8546 char, struct reg_data);
8547 New(0, d->what, count, U8);
8550 for (i = 0; i < count; i++) {
8551 d->what[i] = r->data->what[i];
8552 switch (d->what[i]) {
8554 d->data[i] = sv_dup_inc((SV *)r->data->data[i], param);
8557 d->data[i] = av_dup_inc((AV *)r->data->data[i], param);
8560 /* This is cheating. */
8561 New(0, d->data[i], 1, struct regnode_charclass_class);
8562 StructCopy(r->data->data[i], d->data[i],
8563 struct regnode_charclass_class);
8564 ret->regstclass = (regnode*)d->data[i];
8567 /* Compiled op trees are readonly, and can thus be
8568 shared without duplication. */
8569 d->data[i] = (void*)OpREFCNT_inc((OP*)r->data->data[i]);
8572 d->data[i] = r->data->data[i];
8582 New(0, ret->offsets, 2*len+1, U32);
8583 Copy(r->offsets, ret->offsets, 2*len+1, U32);
8585 ret->precomp = SAVEPV(r->precomp);
8586 ret->refcnt = r->refcnt;
8587 ret->minlen = r->minlen;
8588 ret->prelen = r->prelen;
8589 ret->nparens = r->nparens;
8590 ret->lastparen = r->lastparen;
8591 ret->lastcloseparen = r->lastcloseparen;
8592 ret->reganch = r->reganch;
8594 ret->sublen = r->sublen;
8596 if (RX_MATCH_COPIED(ret))
8597 ret->subbeg = SAVEPV(r->subbeg);
8599 ret->subbeg = Nullch;
8601 ptr_table_store(PL_ptr_table, r, ret);
8605 /* duplicate a file handle */
8608 Perl_fp_dup(pTHX_ PerlIO *fp, char type, CLONE_PARAMS *param)
8612 return (PerlIO*)NULL;
8614 /* look for it in the table first */
8615 ret = (PerlIO*)ptr_table_fetch(PL_ptr_table, fp);
8619 /* create anew and remember what it is */
8620 ret = PerlIO_fdupopen(aTHX_ fp, param, PERLIO_DUP_CLONE);
8621 ptr_table_store(PL_ptr_table, fp, ret);
8625 /* duplicate a directory handle */
8628 Perl_dirp_dup(pTHX_ DIR *dp)
8636 /* duplicate a typeglob */
8639 Perl_gp_dup(pTHX_ GP *gp, CLONE_PARAMS* param)
8644 /* look for it in the table first */
8645 ret = (GP*)ptr_table_fetch(PL_ptr_table, gp);
8649 /* create anew and remember what it is */
8650 Newz(0, ret, 1, GP);
8651 ptr_table_store(PL_ptr_table, gp, ret);
8654 ret->gp_refcnt = 0; /* must be before any other dups! */
8655 ret->gp_sv = sv_dup_inc(gp->gp_sv, param);
8656 ret->gp_io = io_dup_inc(gp->gp_io, param);
8657 ret->gp_form = cv_dup_inc(gp->gp_form, param);
8658 ret->gp_av = av_dup_inc(gp->gp_av, param);
8659 ret->gp_hv = hv_dup_inc(gp->gp_hv, param);
8660 ret->gp_egv = gv_dup(gp->gp_egv, param);/* GvEGV is not refcounted */
8661 ret->gp_cv = cv_dup_inc(gp->gp_cv, param);
8662 ret->gp_cvgen = gp->gp_cvgen;
8663 ret->gp_flags = gp->gp_flags;
8664 ret->gp_line = gp->gp_line;
8665 ret->gp_file = gp->gp_file; /* points to COP.cop_file */
8669 /* duplicate a chain of magic */
8672 Perl_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS* param)
8674 MAGIC *mgprev = (MAGIC*)NULL;
8677 return (MAGIC*)NULL;
8678 /* look for it in the table first */
8679 mgret = (MAGIC*)ptr_table_fetch(PL_ptr_table, mg);
8683 for (; mg; mg = mg->mg_moremagic) {
8685 Newz(0, nmg, 1, MAGIC);
8687 mgprev->mg_moremagic = nmg;
8690 nmg->mg_virtual = mg->mg_virtual; /* XXX copy dynamic vtable? */
8691 nmg->mg_private = mg->mg_private;
8692 nmg->mg_type = mg->mg_type;
8693 nmg->mg_flags = mg->mg_flags;
8694 if (mg->mg_type == PERL_MAGIC_qr) {
8695 nmg->mg_obj = (SV*)re_dup((REGEXP*)mg->mg_obj, param);
8697 else if(mg->mg_type == PERL_MAGIC_backref) {
8698 AV *av = (AV*) mg->mg_obj;
8701 nmg->mg_obj = (SV*)newAV();
8705 av_push((AV*)nmg->mg_obj,sv_dup(svp[i],param));
8710 nmg->mg_obj = (mg->mg_flags & MGf_REFCOUNTED)
8711 ? sv_dup_inc(mg->mg_obj, param)
8712 : sv_dup(mg->mg_obj, param);
8714 nmg->mg_len = mg->mg_len;
8715 nmg->mg_ptr = mg->mg_ptr; /* XXX random ptr? */
8716 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
8717 if (mg->mg_len > 0) {
8718 nmg->mg_ptr = SAVEPVN(mg->mg_ptr, mg->mg_len);
8719 if (mg->mg_type == PERL_MAGIC_overload_table &&
8720 AMT_AMAGIC((AMT*)mg->mg_ptr))
8722 AMT *amtp = (AMT*)mg->mg_ptr;
8723 AMT *namtp = (AMT*)nmg->mg_ptr;
8725 for (i = 1; i < NofAMmeth; i++) {
8726 namtp->table[i] = cv_dup_inc(amtp->table[i], param);
8730 else if (mg->mg_len == HEf_SVKEY)
8731 nmg->mg_ptr = (char*)sv_dup_inc((SV*)mg->mg_ptr, param);
8733 if ((mg->mg_flags & MGf_DUP) && mg->mg_virtual && mg->mg_virtual->svt_dup) {
8734 CALL_FPTR(nmg->mg_virtual->svt_dup)(aTHX_ nmg, param);
8741 /* create a new pointer-mapping table */
8744 Perl_ptr_table_new(pTHX)
8747 Newz(0, tbl, 1, PTR_TBL_t);
8750 Newz(0, tbl->tbl_ary, tbl->tbl_max + 1, PTR_TBL_ENT_t*);
8754 /* map an existing pointer using a table */
8757 Perl_ptr_table_fetch(pTHX_ PTR_TBL_t *tbl, void *sv)
8759 PTR_TBL_ENT_t *tblent;
8760 UV hash = PTR2UV(sv);
8762 tblent = tbl->tbl_ary[hash & tbl->tbl_max];
8763 for (; tblent; tblent = tblent->next) {
8764 if (tblent->oldval == sv)
8765 return tblent->newval;
8770 /* add a new entry to a pointer-mapping table */
8773 Perl_ptr_table_store(pTHX_ PTR_TBL_t *tbl, void *oldv, void *newv)
8775 PTR_TBL_ENT_t *tblent, **otblent;
8776 /* XXX this may be pessimal on platforms where pointers aren't good
8777 * hash values e.g. if they grow faster in the most significant
8779 UV hash = PTR2UV(oldv);
8783 otblent = &tbl->tbl_ary[hash & tbl->tbl_max];
8784 for (tblent = *otblent; tblent; i=0, tblent = tblent->next) {
8785 if (tblent->oldval == oldv) {
8786 tblent->newval = newv;
8791 Newz(0, tblent, 1, PTR_TBL_ENT_t);
8792 tblent->oldval = oldv;
8793 tblent->newval = newv;
8794 tblent->next = *otblent;
8797 if (i && tbl->tbl_items > tbl->tbl_max)
8798 ptr_table_split(tbl);
8801 /* double the hash bucket size of an existing ptr table */
8804 Perl_ptr_table_split(pTHX_ PTR_TBL_t *tbl)
8806 PTR_TBL_ENT_t **ary = tbl->tbl_ary;
8807 UV oldsize = tbl->tbl_max + 1;
8808 UV newsize = oldsize * 2;
8811 Renew(ary, newsize, PTR_TBL_ENT_t*);
8812 Zero(&ary[oldsize], newsize-oldsize, PTR_TBL_ENT_t*);
8813 tbl->tbl_max = --newsize;
8815 for (i=0; i < oldsize; i++, ary++) {
8816 PTR_TBL_ENT_t **curentp, **entp, *ent;
8819 curentp = ary + oldsize;
8820 for (entp = ary, ent = *ary; ent; ent = *entp) {
8821 if ((newsize & PTR2UV(ent->oldval)) != i) {
8823 ent->next = *curentp;
8833 /* remove all the entries from a ptr table */
8836 Perl_ptr_table_clear(pTHX_ PTR_TBL_t *tbl)
8838 register PTR_TBL_ENT_t **array;
8839 register PTR_TBL_ENT_t *entry;
8840 register PTR_TBL_ENT_t *oentry = Null(PTR_TBL_ENT_t*);
8844 if (!tbl || !tbl->tbl_items) {
8848 array = tbl->tbl_ary;
8855 entry = entry->next;
8859 if (++riter > max) {
8862 entry = array[riter];
8869 /* clear and free a ptr table */
8872 Perl_ptr_table_free(pTHX_ PTR_TBL_t *tbl)
8877 ptr_table_clear(tbl);
8878 Safefree(tbl->tbl_ary);
8886 /* attempt to make everything in the typeglob readonly */
8889 S_gv_share(pTHX_ SV *sstr)
8892 SV *sv = &PL_sv_no; /* just need SvREADONLY-ness */
8894 if (GvIO(gv) || GvFORM(gv)) {
8895 GvUNIQUE_off(gv); /* GvIOs cannot be shared. nor can GvFORMs */
8897 else if (!GvCV(gv)) {
8901 /* CvPADLISTs cannot be shared */
8902 if (!CvXSUB(GvCV(gv))) {
8907 if (!GvUNIQUE(gv)) {
8909 PerlIO_printf(Perl_debug_log, "gv_share: unable to share %s::%s\n",
8910 HvNAME(GvSTASH(gv)), GvNAME(gv));
8916 * write attempts will die with
8917 * "Modification of a read-only value attempted"
8923 SvREADONLY_on(GvSV(gv));
8930 SvREADONLY_on(GvAV(gv));
8937 SvREADONLY_on(GvAV(gv));
8940 return sstr; /* he_dup() will SvREFCNT_inc() */
8943 /* duplicate an SV of any type (including AV, HV etc) */
8946 Perl_rvpv_dup(pTHX_ SV *dstr, SV *sstr, CLONE_PARAMS* param)
8949 SvRV(dstr) = SvWEAKREF(sstr)
8950 ? sv_dup(SvRV(sstr), param)
8951 : sv_dup_inc(SvRV(sstr), param);
8953 else if (SvPVX(sstr)) {
8954 /* Has something there */
8956 /* Normal PV - clone whole allocated space */
8957 SvPVX(dstr) = SAVEPVN(SvPVX(sstr), SvLEN(sstr)-1);
8960 /* Special case - not normally malloced for some reason */
8961 if (SvREADONLY(sstr) && SvFAKE(sstr)) {
8962 /* A "shared" PV - clone it as unshared string */
8964 SvREADONLY_off(dstr);
8965 SvPVX(dstr) = SAVEPVN(SvPVX(sstr), SvCUR(sstr));
8968 /* Some other special case - random pointer */
8969 SvPVX(dstr) = SvPVX(sstr);
8975 SvPVX(dstr) = SvPVX(sstr);
8980 Perl_sv_dup(pTHX_ SV *sstr, CLONE_PARAMS* param)
8984 if (!sstr || SvTYPE(sstr) == SVTYPEMASK)
8986 /* look for it in the table first */
8987 dstr = (SV*)ptr_table_fetch(PL_ptr_table, sstr);
8991 /* create anew and remember what it is */
8993 ptr_table_store(PL_ptr_table, sstr, dstr);
8996 SvFLAGS(dstr) = SvFLAGS(sstr);
8997 SvFLAGS(dstr) &= ~SVf_OOK; /* don't propagate OOK hack */
8998 SvREFCNT(dstr) = 0; /* must be before any other dups! */
9001 if (SvANY(sstr) && PL_watch_pvx && SvPVX(sstr) == PL_watch_pvx)
9002 PerlIO_printf(Perl_debug_log, "watch at %p hit, found string \"%s\"\n",
9003 PL_watch_pvx, SvPVX(sstr));
9006 switch (SvTYPE(sstr)) {
9011 SvANY(dstr) = new_XIV();
9012 SvIVX(dstr) = SvIVX(sstr);
9015 SvANY(dstr) = new_XNV();
9016 SvNVX(dstr) = SvNVX(sstr);
9019 SvANY(dstr) = new_XRV();
9020 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9023 SvANY(dstr) = new_XPV();
9024 SvCUR(dstr) = SvCUR(sstr);
9025 SvLEN(dstr) = SvLEN(sstr);
9026 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9029 SvANY(dstr) = new_XPVIV();
9030 SvCUR(dstr) = SvCUR(sstr);
9031 SvLEN(dstr) = SvLEN(sstr);
9032 SvIVX(dstr) = SvIVX(sstr);
9033 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9036 SvANY(dstr) = new_XPVNV();
9037 SvCUR(dstr) = SvCUR(sstr);
9038 SvLEN(dstr) = SvLEN(sstr);
9039 SvIVX(dstr) = SvIVX(sstr);
9040 SvNVX(dstr) = SvNVX(sstr);
9041 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9044 SvANY(dstr) = new_XPVMG();
9045 SvCUR(dstr) = SvCUR(sstr);
9046 SvLEN(dstr) = SvLEN(sstr);
9047 SvIVX(dstr) = SvIVX(sstr);
9048 SvNVX(dstr) = SvNVX(sstr);
9049 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9050 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9051 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9054 SvANY(dstr) = new_XPVBM();
9055 SvCUR(dstr) = SvCUR(sstr);
9056 SvLEN(dstr) = SvLEN(sstr);
9057 SvIVX(dstr) = SvIVX(sstr);
9058 SvNVX(dstr) = SvNVX(sstr);
9059 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9060 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9061 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9062 BmRARE(dstr) = BmRARE(sstr);
9063 BmUSEFUL(dstr) = BmUSEFUL(sstr);
9064 BmPREVIOUS(dstr)= BmPREVIOUS(sstr);
9067 SvANY(dstr) = new_XPVLV();
9068 SvCUR(dstr) = SvCUR(sstr);
9069 SvLEN(dstr) = SvLEN(sstr);
9070 SvIVX(dstr) = SvIVX(sstr);
9071 SvNVX(dstr) = SvNVX(sstr);
9072 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9073 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9074 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9075 LvTARGOFF(dstr) = LvTARGOFF(sstr); /* XXX sometimes holds PMOP* when DEBUGGING */
9076 LvTARGLEN(dstr) = LvTARGLEN(sstr);
9077 LvTARG(dstr) = sv_dup_inc(LvTARG(sstr), param);
9078 LvTYPE(dstr) = LvTYPE(sstr);
9081 if (GvUNIQUE((GV*)sstr)) {
9083 if ((share = gv_share(sstr))) {
9087 PerlIO_printf(Perl_debug_log, "sv_dup: sharing %s::%s\n",
9088 HvNAME(GvSTASH(share)), GvNAME(share));
9093 SvANY(dstr) = new_XPVGV();
9094 SvCUR(dstr) = SvCUR(sstr);
9095 SvLEN(dstr) = SvLEN(sstr);
9096 SvIVX(dstr) = SvIVX(sstr);
9097 SvNVX(dstr) = SvNVX(sstr);
9098 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9099 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9100 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9101 GvNAMELEN(dstr) = GvNAMELEN(sstr);
9102 GvNAME(dstr) = SAVEPVN(GvNAME(sstr), GvNAMELEN(sstr));
9103 GvSTASH(dstr) = hv_dup_inc(GvSTASH(sstr), param);
9104 GvFLAGS(dstr) = GvFLAGS(sstr);
9105 GvGP(dstr) = gp_dup(GvGP(sstr), param);
9106 (void)GpREFCNT_inc(GvGP(dstr));
9109 SvANY(dstr) = new_XPVIO();
9110 SvCUR(dstr) = SvCUR(sstr);
9111 SvLEN(dstr) = SvLEN(sstr);
9112 SvIVX(dstr) = SvIVX(sstr);
9113 SvNVX(dstr) = SvNVX(sstr);
9114 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9115 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9116 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9117 IoIFP(dstr) = fp_dup(IoIFP(sstr), IoTYPE(sstr), param);
9118 if (IoOFP(sstr) == IoIFP(sstr))
9119 IoOFP(dstr) = IoIFP(dstr);
9121 IoOFP(dstr) = fp_dup(IoOFP(sstr), IoTYPE(sstr), param);
9122 /* PL_rsfp_filters entries have fake IoDIRP() */
9123 if (IoDIRP(sstr) && !(IoFLAGS(sstr) & IOf_FAKE_DIRP))
9124 IoDIRP(dstr) = dirp_dup(IoDIRP(sstr));
9126 IoDIRP(dstr) = IoDIRP(sstr);
9127 IoLINES(dstr) = IoLINES(sstr);
9128 IoPAGE(dstr) = IoPAGE(sstr);
9129 IoPAGE_LEN(dstr) = IoPAGE_LEN(sstr);
9130 IoLINES_LEFT(dstr) = IoLINES_LEFT(sstr);
9131 IoTOP_NAME(dstr) = SAVEPV(IoTOP_NAME(sstr));
9132 IoTOP_GV(dstr) = gv_dup(IoTOP_GV(sstr), param);
9133 IoFMT_NAME(dstr) = SAVEPV(IoFMT_NAME(sstr));
9134 IoFMT_GV(dstr) = gv_dup(IoFMT_GV(sstr), param);
9135 IoBOTTOM_NAME(dstr) = SAVEPV(IoBOTTOM_NAME(sstr));
9136 IoBOTTOM_GV(dstr) = gv_dup(IoBOTTOM_GV(sstr), param);
9137 IoSUBPROCESS(dstr) = IoSUBPROCESS(sstr);
9138 IoTYPE(dstr) = IoTYPE(sstr);
9139 IoFLAGS(dstr) = IoFLAGS(sstr);
9142 SvANY(dstr) = new_XPVAV();
9143 SvCUR(dstr) = SvCUR(sstr);
9144 SvLEN(dstr) = SvLEN(sstr);
9145 SvIVX(dstr) = SvIVX(sstr);
9146 SvNVX(dstr) = SvNVX(sstr);
9147 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9148 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9149 AvARYLEN((AV*)dstr) = sv_dup_inc(AvARYLEN((AV*)sstr), param);
9150 AvFLAGS((AV*)dstr) = AvFLAGS((AV*)sstr);
9151 if (AvARRAY((AV*)sstr)) {
9152 SV **dst_ary, **src_ary;
9153 SSize_t items = AvFILLp((AV*)sstr) + 1;
9155 src_ary = AvARRAY((AV*)sstr);
9156 Newz(0, dst_ary, AvMAX((AV*)sstr)+1, SV*);
9157 ptr_table_store(PL_ptr_table, src_ary, dst_ary);
9158 SvPVX(dstr) = (char*)dst_ary;
9159 AvALLOC((AV*)dstr) = dst_ary;
9160 if (AvREAL((AV*)sstr)) {
9162 *dst_ary++ = sv_dup_inc(*src_ary++, param);
9166 *dst_ary++ = sv_dup(*src_ary++, param);
9168 items = AvMAX((AV*)sstr) - AvFILLp((AV*)sstr);
9169 while (items-- > 0) {
9170 *dst_ary++ = &PL_sv_undef;
9174 SvPVX(dstr) = Nullch;
9175 AvALLOC((AV*)dstr) = (SV**)NULL;
9179 SvANY(dstr) = new_XPVHV();
9180 SvCUR(dstr) = SvCUR(sstr);
9181 SvLEN(dstr) = SvLEN(sstr);
9182 SvIVX(dstr) = SvIVX(sstr);
9183 SvNVX(dstr) = SvNVX(sstr);
9184 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9185 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9186 HvRITER((HV*)dstr) = HvRITER((HV*)sstr);
9187 if (HvARRAY((HV*)sstr)) {
9189 XPVHV *dxhv = (XPVHV*)SvANY(dstr);
9190 XPVHV *sxhv = (XPVHV*)SvANY(sstr);
9191 Newz(0, dxhv->xhv_array,
9192 PERL_HV_ARRAY_ALLOC_BYTES(dxhv->xhv_max+1), char);
9193 while (i <= sxhv->xhv_max) {
9194 ((HE**)dxhv->xhv_array)[i] = he_dup(((HE**)sxhv->xhv_array)[i],
9195 (bool)!!HvSHAREKEYS(sstr),
9199 dxhv->xhv_eiter = he_dup(sxhv->xhv_eiter,
9200 (bool)!!HvSHAREKEYS(sstr), param);
9203 SvPVX(dstr) = Nullch;
9204 HvEITER((HV*)dstr) = (HE*)NULL;
9206 HvPMROOT((HV*)dstr) = HvPMROOT((HV*)sstr); /* XXX */
9207 HvNAME((HV*)dstr) = SAVEPV(HvNAME((HV*)sstr));
9208 /* Record stashes for possible cloning in Perl_clone(). */
9209 if(HvNAME((HV*)dstr))
9210 av_push(param->stashes, dstr);
9213 SvANY(dstr) = new_XPVFM();
9214 FmLINES(dstr) = FmLINES(sstr);
9218 SvANY(dstr) = new_XPVCV();
9220 SvCUR(dstr) = SvCUR(sstr);
9221 SvLEN(dstr) = SvLEN(sstr);
9222 SvIVX(dstr) = SvIVX(sstr);
9223 SvNVX(dstr) = SvNVX(sstr);
9224 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9225 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9226 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9227 CvSTASH(dstr) = hv_dup(CvSTASH(sstr), param); /* NOTE: not refcounted */
9228 CvSTART(dstr) = CvSTART(sstr);
9229 CvROOT(dstr) = OpREFCNT_inc(CvROOT(sstr));
9230 CvXSUB(dstr) = CvXSUB(sstr);
9231 CvXSUBANY(dstr) = CvXSUBANY(sstr);
9232 if (CvCONST(sstr)) {
9233 CvXSUBANY(dstr).any_ptr = GvUNIQUE(CvGV(sstr)) ?
9234 SvREFCNT_inc(CvXSUBANY(sstr).any_ptr) :
9235 sv_dup_inc(CvXSUBANY(sstr).any_ptr, param);
9237 CvGV(dstr) = gv_dup(CvGV(sstr), param);
9238 if (param->flags & CLONEf_COPY_STACKS) {
9239 CvDEPTH(dstr) = CvDEPTH(sstr);
9243 if (CvPADLIST(sstr) && !AvREAL(CvPADLIST(sstr))) {
9244 /* XXX padlists are real, but pretend to be not */
9245 AvREAL_on(CvPADLIST(sstr));
9246 CvPADLIST(dstr) = av_dup_inc(CvPADLIST(sstr), param);
9247 AvREAL_off(CvPADLIST(sstr));
9248 AvREAL_off(CvPADLIST(dstr));
9251 CvPADLIST(dstr) = av_dup_inc(CvPADLIST(sstr), param);
9252 if (!CvANON(sstr) || CvCLONED(sstr))
9253 CvOUTSIDE(dstr) = cv_dup_inc(CvOUTSIDE(sstr), param);
9255 CvOUTSIDE(dstr) = cv_dup(CvOUTSIDE(sstr), param);
9256 CvFLAGS(dstr) = CvFLAGS(sstr);
9257 CvFILE(dstr) = CvXSUB(sstr) ? CvFILE(sstr) : SAVEPV(CvFILE(sstr));
9260 Perl_croak(aTHX_ "Bizarre SvTYPE [%" IVdf "]", (IV)SvTYPE(sstr));
9264 if (SvOBJECT(dstr) && SvTYPE(dstr) != SVt_PVIO)
9270 /* duplicate a context */
9273 Perl_cx_dup(pTHX_ PERL_CONTEXT *cxs, I32 ix, I32 max, CLONE_PARAMS* param)
9278 return (PERL_CONTEXT*)NULL;
9280 /* look for it in the table first */
9281 ncxs = (PERL_CONTEXT*)ptr_table_fetch(PL_ptr_table, cxs);
9285 /* create anew and remember what it is */
9286 Newz(56, ncxs, max + 1, PERL_CONTEXT);
9287 ptr_table_store(PL_ptr_table, cxs, ncxs);
9290 PERL_CONTEXT *cx = &cxs[ix];
9291 PERL_CONTEXT *ncx = &ncxs[ix];
9292 ncx->cx_type = cx->cx_type;
9293 if (CxTYPE(cx) == CXt_SUBST) {
9294 Perl_croak(aTHX_ "Cloning substitution context is unimplemented");
9297 ncx->blk_oldsp = cx->blk_oldsp;
9298 ncx->blk_oldcop = cx->blk_oldcop;
9299 ncx->blk_oldretsp = cx->blk_oldretsp;
9300 ncx->blk_oldmarksp = cx->blk_oldmarksp;
9301 ncx->blk_oldscopesp = cx->blk_oldscopesp;
9302 ncx->blk_oldpm = cx->blk_oldpm;
9303 ncx->blk_gimme = cx->blk_gimme;
9304 switch (CxTYPE(cx)) {
9306 ncx->blk_sub.cv = (cx->blk_sub.olddepth == 0
9307 ? cv_dup_inc(cx->blk_sub.cv, param)
9308 : cv_dup(cx->blk_sub.cv,param));
9309 ncx->blk_sub.argarray = (cx->blk_sub.hasargs
9310 ? av_dup_inc(cx->blk_sub.argarray, param)
9312 ncx->blk_sub.savearray = av_dup_inc(cx->blk_sub.savearray, param);
9313 ncx->blk_sub.olddepth = cx->blk_sub.olddepth;
9314 ncx->blk_sub.hasargs = cx->blk_sub.hasargs;
9315 ncx->blk_sub.lval = cx->blk_sub.lval;
9318 ncx->blk_eval.old_in_eval = cx->blk_eval.old_in_eval;
9319 ncx->blk_eval.old_op_type = cx->blk_eval.old_op_type;
9320 ncx->blk_eval.old_namesv = sv_dup_inc(cx->blk_eval.old_namesv, param);;
9321 ncx->blk_eval.old_eval_root = cx->blk_eval.old_eval_root;
9322 ncx->blk_eval.cur_text = sv_dup(cx->blk_eval.cur_text, param);
9325 ncx->blk_loop.label = cx->blk_loop.label;
9326 ncx->blk_loop.resetsp = cx->blk_loop.resetsp;
9327 ncx->blk_loop.redo_op = cx->blk_loop.redo_op;
9328 ncx->blk_loop.next_op = cx->blk_loop.next_op;
9329 ncx->blk_loop.last_op = cx->blk_loop.last_op;
9330 ncx->blk_loop.iterdata = (CxPADLOOP(cx)
9331 ? cx->blk_loop.iterdata
9332 : gv_dup((GV*)cx->blk_loop.iterdata, param));
9333 ncx->blk_loop.oldcurpad
9334 = (SV**)ptr_table_fetch(PL_ptr_table,
9335 cx->blk_loop.oldcurpad);
9336 ncx->blk_loop.itersave = sv_dup_inc(cx->blk_loop.itersave, param);
9337 ncx->blk_loop.iterlval = sv_dup_inc(cx->blk_loop.iterlval, param);
9338 ncx->blk_loop.iterary = av_dup_inc(cx->blk_loop.iterary, param);
9339 ncx->blk_loop.iterix = cx->blk_loop.iterix;
9340 ncx->blk_loop.itermax = cx->blk_loop.itermax;
9343 ncx->blk_sub.cv = cv_dup(cx->blk_sub.cv, param);
9344 ncx->blk_sub.gv = gv_dup(cx->blk_sub.gv, param);
9345 ncx->blk_sub.dfoutgv = gv_dup_inc(cx->blk_sub.dfoutgv, param);
9346 ncx->blk_sub.hasargs = cx->blk_sub.hasargs;
9358 /* duplicate a stack info structure */
9361 Perl_si_dup(pTHX_ PERL_SI *si, CLONE_PARAMS* param)
9366 return (PERL_SI*)NULL;
9368 /* look for it in the table first */
9369 nsi = (PERL_SI*)ptr_table_fetch(PL_ptr_table, si);
9373 /* create anew and remember what it is */
9374 Newz(56, nsi, 1, PERL_SI);
9375 ptr_table_store(PL_ptr_table, si, nsi);
9377 nsi->si_stack = av_dup_inc(si->si_stack, param);
9378 nsi->si_cxix = si->si_cxix;
9379 nsi->si_cxmax = si->si_cxmax;
9380 nsi->si_cxstack = cx_dup(si->si_cxstack, si->si_cxix, si->si_cxmax, param);
9381 nsi->si_type = si->si_type;
9382 nsi->si_prev = si_dup(si->si_prev, param);
9383 nsi->si_next = si_dup(si->si_next, param);
9384 nsi->si_markoff = si->si_markoff;
9389 #define POPINT(ss,ix) ((ss)[--(ix)].any_i32)
9390 #define TOPINT(ss,ix) ((ss)[ix].any_i32)
9391 #define POPLONG(ss,ix) ((ss)[--(ix)].any_long)
9392 #define TOPLONG(ss,ix) ((ss)[ix].any_long)
9393 #define POPIV(ss,ix) ((ss)[--(ix)].any_iv)
9394 #define TOPIV(ss,ix) ((ss)[ix].any_iv)
9395 #define POPPTR(ss,ix) ((ss)[--(ix)].any_ptr)
9396 #define TOPPTR(ss,ix) ((ss)[ix].any_ptr)
9397 #define POPDPTR(ss,ix) ((ss)[--(ix)].any_dptr)
9398 #define TOPDPTR(ss,ix) ((ss)[ix].any_dptr)
9399 #define POPDXPTR(ss,ix) ((ss)[--(ix)].any_dxptr)
9400 #define TOPDXPTR(ss,ix) ((ss)[ix].any_dxptr)
9403 #define pv_dup_inc(p) SAVEPV(p)
9404 #define pv_dup(p) SAVEPV(p)
9405 #define svp_dup_inc(p,pp) any_dup(p,pp)
9407 /* map any object to the new equivent - either something in the
9408 * ptr table, or something in the interpreter structure
9412 Perl_any_dup(pTHX_ void *v, PerlInterpreter *proto_perl)
9419 /* look for it in the table first */
9420 ret = ptr_table_fetch(PL_ptr_table, v);
9424 /* see if it is part of the interpreter structure */
9425 if (v >= (void*)proto_perl && v < (void*)(proto_perl+1))
9426 ret = (void*)(((char*)aTHX) + (((char*)v) - (char*)proto_perl));
9434 /* duplicate the save stack */
9437 Perl_ss_dup(pTHX_ PerlInterpreter *proto_perl, CLONE_PARAMS* param)
9439 ANY *ss = proto_perl->Tsavestack;
9440 I32 ix = proto_perl->Tsavestack_ix;
9441 I32 max = proto_perl->Tsavestack_max;
9454 void (*dptr) (void*);
9455 void (*dxptr) (pTHX_ void*);
9458 Newz(54, nss, max, ANY);
9464 case SAVEt_ITEM: /* normal string */
9465 sv = (SV*)POPPTR(ss,ix);
9466 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9467 sv = (SV*)POPPTR(ss,ix);
9468 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9470 case SAVEt_SV: /* scalar reference */
9471 sv = (SV*)POPPTR(ss,ix);
9472 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9473 gv = (GV*)POPPTR(ss,ix);
9474 TOPPTR(nss,ix) = gv_dup_inc(gv, param);
9476 case SAVEt_GENERIC_PVREF: /* generic char* */
9477 c = (char*)POPPTR(ss,ix);
9478 TOPPTR(nss,ix) = pv_dup(c);
9479 ptr = POPPTR(ss,ix);
9480 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9482 case SAVEt_SHARED_PVREF: /* char* in shared space */
9483 c = (char*)POPPTR(ss,ix);
9484 TOPPTR(nss,ix) = savesharedpv(c);
9485 ptr = POPPTR(ss,ix);
9486 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9488 case SAVEt_GENERIC_SVREF: /* generic sv */
9489 case SAVEt_SVREF: /* scalar reference */
9490 sv = (SV*)POPPTR(ss,ix);
9491 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9492 ptr = POPPTR(ss,ix);
9493 TOPPTR(nss,ix) = svp_dup_inc((SV**)ptr, proto_perl);/* XXXXX */
9495 case SAVEt_AV: /* array reference */
9496 av = (AV*)POPPTR(ss,ix);
9497 TOPPTR(nss,ix) = av_dup_inc(av, param);
9498 gv = (GV*)POPPTR(ss,ix);
9499 TOPPTR(nss,ix) = gv_dup(gv, param);
9501 case SAVEt_HV: /* hash reference */
9502 hv = (HV*)POPPTR(ss,ix);
9503 TOPPTR(nss,ix) = hv_dup_inc(hv, param);
9504 gv = (GV*)POPPTR(ss,ix);
9505 TOPPTR(nss,ix) = gv_dup(gv, param);
9507 case SAVEt_INT: /* int reference */
9508 ptr = POPPTR(ss,ix);
9509 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9510 intval = (int)POPINT(ss,ix);
9511 TOPINT(nss,ix) = intval;
9513 case SAVEt_LONG: /* long reference */
9514 ptr = POPPTR(ss,ix);
9515 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9516 longval = (long)POPLONG(ss,ix);
9517 TOPLONG(nss,ix) = longval;
9519 case SAVEt_I32: /* I32 reference */
9520 case SAVEt_I16: /* I16 reference */
9521 case SAVEt_I8: /* I8 reference */
9522 ptr = POPPTR(ss,ix);
9523 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9527 case SAVEt_IV: /* IV reference */
9528 ptr = POPPTR(ss,ix);
9529 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9533 case SAVEt_SPTR: /* SV* reference */
9534 ptr = POPPTR(ss,ix);
9535 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9536 sv = (SV*)POPPTR(ss,ix);
9537 TOPPTR(nss,ix) = sv_dup(sv, param);
9539 case SAVEt_VPTR: /* random* reference */
9540 ptr = POPPTR(ss,ix);
9541 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9542 ptr = POPPTR(ss,ix);
9543 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9545 case SAVEt_PPTR: /* char* reference */
9546 ptr = POPPTR(ss,ix);
9547 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9548 c = (char*)POPPTR(ss,ix);
9549 TOPPTR(nss,ix) = pv_dup(c);
9551 case SAVEt_HPTR: /* HV* reference */
9552 ptr = POPPTR(ss,ix);
9553 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9554 hv = (HV*)POPPTR(ss,ix);
9555 TOPPTR(nss,ix) = hv_dup(hv, param);
9557 case SAVEt_APTR: /* AV* reference */
9558 ptr = POPPTR(ss,ix);
9559 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9560 av = (AV*)POPPTR(ss,ix);
9561 TOPPTR(nss,ix) = av_dup(av, param);
9564 gv = (GV*)POPPTR(ss,ix);
9565 TOPPTR(nss,ix) = gv_dup(gv, param);
9567 case SAVEt_GP: /* scalar reference */
9568 gp = (GP*)POPPTR(ss,ix);
9569 TOPPTR(nss,ix) = gp = gp_dup(gp, param);
9570 (void)GpREFCNT_inc(gp);
9571 gv = (GV*)POPPTR(ss,ix);
9572 TOPPTR(nss,ix) = gv_dup_inc(gv, param);
9573 c = (char*)POPPTR(ss,ix);
9574 TOPPTR(nss,ix) = pv_dup(c);
9581 case SAVEt_MORTALIZESV:
9582 sv = (SV*)POPPTR(ss,ix);
9583 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9586 ptr = POPPTR(ss,ix);
9587 if (ptr && (((OP*)ptr)->op_private & OPpREFCOUNTED)) {
9588 /* these are assumed to be refcounted properly */
9589 switch (((OP*)ptr)->op_type) {
9596 TOPPTR(nss,ix) = ptr;
9601 TOPPTR(nss,ix) = Nullop;
9606 TOPPTR(nss,ix) = Nullop;
9609 c = (char*)POPPTR(ss,ix);
9610 TOPPTR(nss,ix) = pv_dup_inc(c);
9613 longval = POPLONG(ss,ix);
9614 TOPLONG(nss,ix) = longval;
9617 hv = (HV*)POPPTR(ss,ix);
9618 TOPPTR(nss,ix) = hv_dup_inc(hv, param);
9619 c = (char*)POPPTR(ss,ix);
9620 TOPPTR(nss,ix) = pv_dup_inc(c);
9624 case SAVEt_DESTRUCTOR:
9625 ptr = POPPTR(ss,ix);
9626 TOPPTR(nss,ix) = any_dup(ptr, proto_perl); /* XXX quite arbitrary */
9627 dptr = POPDPTR(ss,ix);
9628 TOPDPTR(nss,ix) = (void (*)(void*))any_dup((void *)dptr, proto_perl);
9630 case SAVEt_DESTRUCTOR_X:
9631 ptr = POPPTR(ss,ix);
9632 TOPPTR(nss,ix) = any_dup(ptr, proto_perl); /* XXX quite arbitrary */
9633 dxptr = POPDXPTR(ss,ix);
9634 TOPDXPTR(nss,ix) = (void (*)(pTHX_ void*))any_dup((void *)dxptr, proto_perl);
9636 case SAVEt_REGCONTEXT:
9642 case SAVEt_STACK_POS: /* Position on Perl stack */
9646 case SAVEt_AELEM: /* array element */
9647 sv = (SV*)POPPTR(ss,ix);
9648 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9651 av = (AV*)POPPTR(ss,ix);
9652 TOPPTR(nss,ix) = av_dup_inc(av, param);
9654 case SAVEt_HELEM: /* hash element */
9655 sv = (SV*)POPPTR(ss,ix);
9656 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9657 sv = (SV*)POPPTR(ss,ix);
9658 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9659 hv = (HV*)POPPTR(ss,ix);
9660 TOPPTR(nss,ix) = hv_dup_inc(hv, param);
9663 ptr = POPPTR(ss,ix);
9664 TOPPTR(nss,ix) = ptr;
9671 av = (AV*)POPPTR(ss,ix);
9672 TOPPTR(nss,ix) = av_dup(av, param);
9675 longval = (long)POPLONG(ss,ix);
9676 TOPLONG(nss,ix) = longval;
9677 ptr = POPPTR(ss,ix);
9678 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9679 sv = (SV*)POPPTR(ss,ix);
9680 TOPPTR(nss,ix) = sv_dup(sv, param);
9683 Perl_croak(aTHX_ "panic: ss_dup inconsistency");
9691 =for apidoc perl_clone
9693 Create and return a new interpreter by cloning the current one.
9698 /* XXX the above needs expanding by someone who actually understands it ! */
9699 EXTERN_C PerlInterpreter *
9700 perl_clone_host(PerlInterpreter* proto_perl, UV flags);
9703 perl_clone(PerlInterpreter *proto_perl, UV flags)
9705 #ifdef PERL_IMPLICIT_SYS
9707 /* perlhost.h so we need to call into it
9708 to clone the host, CPerlHost should have a c interface, sky */
9710 if (flags & CLONEf_CLONE_HOST) {
9711 return perl_clone_host(proto_perl,flags);
9713 return perl_clone_using(proto_perl, flags,
9715 proto_perl->IMemShared,
9716 proto_perl->IMemParse,
9726 perl_clone_using(PerlInterpreter *proto_perl, UV flags,
9727 struct IPerlMem* ipM, struct IPerlMem* ipMS,
9728 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
9729 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
9730 struct IPerlDir* ipD, struct IPerlSock* ipS,
9731 struct IPerlProc* ipP)
9733 /* XXX many of the string copies here can be optimized if they're
9734 * constants; they need to be allocated as common memory and just
9735 * their pointers copied. */
9738 CLONE_PARAMS clone_params;
9739 CLONE_PARAMS* param = &clone_params;
9741 PerlInterpreter *my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
9742 PERL_SET_THX(my_perl);
9745 memset(my_perl, 0xab, sizeof(PerlInterpreter));
9751 Zero(&PL_debug_pad, 1, struct perl_debug_pad);
9752 # else /* !DEBUGGING */
9753 Zero(my_perl, 1, PerlInterpreter);
9754 # endif /* DEBUGGING */
9758 PL_MemShared = ipMS;
9766 #else /* !PERL_IMPLICIT_SYS */
9768 CLONE_PARAMS clone_params;
9769 CLONE_PARAMS* param = &clone_params;
9770 PerlInterpreter *my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
9771 PERL_SET_THX(my_perl);
9776 memset(my_perl, 0xab, sizeof(PerlInterpreter));
9782 Zero(&PL_debug_pad, 1, struct perl_debug_pad);
9783 # else /* !DEBUGGING */
9784 Zero(my_perl, 1, PerlInterpreter);
9785 # endif /* DEBUGGING */
9786 #endif /* PERL_IMPLICIT_SYS */
9787 param->flags = flags;
9790 PL_xiv_arenaroot = NULL;
9792 PL_xnv_arenaroot = NULL;
9794 PL_xrv_arenaroot = NULL;
9796 PL_xpv_arenaroot = NULL;
9798 PL_xpviv_arenaroot = NULL;
9799 PL_xpviv_root = NULL;
9800 PL_xpvnv_arenaroot = NULL;
9801 PL_xpvnv_root = NULL;
9802 PL_xpvcv_arenaroot = NULL;
9803 PL_xpvcv_root = NULL;
9804 PL_xpvav_arenaroot = NULL;
9805 PL_xpvav_root = NULL;
9806 PL_xpvhv_arenaroot = NULL;
9807 PL_xpvhv_root = NULL;
9808 PL_xpvmg_arenaroot = NULL;
9809 PL_xpvmg_root = NULL;
9810 PL_xpvlv_arenaroot = NULL;
9811 PL_xpvlv_root = NULL;
9812 PL_xpvbm_arenaroot = NULL;
9813 PL_xpvbm_root = NULL;
9814 PL_he_arenaroot = NULL;
9816 PL_nice_chunk = NULL;
9817 PL_nice_chunk_size = 0;
9820 PL_sv_root = Nullsv;
9821 PL_sv_arenaroot = Nullsv;
9823 PL_debug = proto_perl->Idebug;
9825 #ifdef USE_REENTRANT_API
9826 Perl_reentrant_init(aTHX);
9829 /* create SV map for pointer relocation */
9830 PL_ptr_table = ptr_table_new();
9832 /* initialize these special pointers as early as possible */
9833 SvANY(&PL_sv_undef) = NULL;
9834 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
9835 SvFLAGS(&PL_sv_undef) = SVf_READONLY|SVt_NULL;
9836 ptr_table_store(PL_ptr_table, &proto_perl->Isv_undef, &PL_sv_undef);
9838 SvANY(&PL_sv_no) = new_XPVNV();
9839 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
9840 SvFLAGS(&PL_sv_no) = SVp_NOK|SVf_NOK|SVp_POK|SVf_POK|SVf_READONLY|SVt_PVNV;
9841 SvPVX(&PL_sv_no) = SAVEPVN(PL_No, 0);
9842 SvCUR(&PL_sv_no) = 0;
9843 SvLEN(&PL_sv_no) = 1;
9844 SvNVX(&PL_sv_no) = 0;
9845 ptr_table_store(PL_ptr_table, &proto_perl->Isv_no, &PL_sv_no);
9847 SvANY(&PL_sv_yes) = new_XPVNV();
9848 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
9849 SvFLAGS(&PL_sv_yes) = SVp_NOK|SVf_NOK|SVp_POK|SVf_POK|SVf_READONLY|SVt_PVNV;
9850 SvPVX(&PL_sv_yes) = SAVEPVN(PL_Yes, 1);
9851 SvCUR(&PL_sv_yes) = 1;
9852 SvLEN(&PL_sv_yes) = 2;
9853 SvNVX(&PL_sv_yes) = 1;
9854 ptr_table_store(PL_ptr_table, &proto_perl->Isv_yes, &PL_sv_yes);
9856 /* create (a non-shared!) shared string table */
9857 PL_strtab = newHV();
9858 HvSHAREKEYS_off(PL_strtab);
9859 hv_ksplit(PL_strtab, 512);
9860 ptr_table_store(PL_ptr_table, proto_perl->Istrtab, PL_strtab);
9862 PL_compiling = proto_perl->Icompiling;
9864 /* These two PVs will be free'd special way so must set them same way op.c does */
9865 PL_compiling.cop_stashpv = savesharedpv(PL_compiling.cop_stashpv);
9866 ptr_table_store(PL_ptr_table, proto_perl->Icompiling.cop_stashpv, PL_compiling.cop_stashpv);
9868 PL_compiling.cop_file = savesharedpv(PL_compiling.cop_file);
9869 ptr_table_store(PL_ptr_table, proto_perl->Icompiling.cop_file, PL_compiling.cop_file);
9871 ptr_table_store(PL_ptr_table, &proto_perl->Icompiling, &PL_compiling);
9872 if (!specialWARN(PL_compiling.cop_warnings))
9873 PL_compiling.cop_warnings = sv_dup_inc(PL_compiling.cop_warnings, param);
9874 if (!specialCopIO(PL_compiling.cop_io))
9875 PL_compiling.cop_io = sv_dup_inc(PL_compiling.cop_io, param);
9876 PL_curcop = (COP*)any_dup(proto_perl->Tcurcop, proto_perl);
9878 /* pseudo environmental stuff */
9879 PL_origargc = proto_perl->Iorigargc;
9881 New(0, PL_origargv, i+1, char*);
9882 PL_origargv[i] = '\0';
9884 PL_origargv[i] = SAVEPV(proto_perl->Iorigargv[i]);
9887 param->stashes = newAV(); /* Setup array of objects to call clone on */
9889 #ifdef PERLIO_LAYERS
9890 /* Clone PerlIO tables as soon as we can handle general xx_dup() */
9891 PerlIO_clone(aTHX_ proto_perl, param);
9894 PL_envgv = gv_dup(proto_perl->Ienvgv, param);
9895 PL_incgv = gv_dup(proto_perl->Iincgv, param);
9896 PL_hintgv = gv_dup(proto_perl->Ihintgv, param);
9897 PL_origfilename = SAVEPV(proto_perl->Iorigfilename);
9898 PL_diehook = sv_dup_inc(proto_perl->Idiehook, param);
9899 PL_warnhook = sv_dup_inc(proto_perl->Iwarnhook, param);
9902 PL_minus_c = proto_perl->Iminus_c;
9903 PL_patchlevel = sv_dup_inc(proto_perl->Ipatchlevel, param);
9904 PL_localpatches = proto_perl->Ilocalpatches;
9905 PL_splitstr = proto_perl->Isplitstr;
9906 PL_preprocess = proto_perl->Ipreprocess;
9907 PL_minus_n = proto_perl->Iminus_n;
9908 PL_minus_p = proto_perl->Iminus_p;
9909 PL_minus_l = proto_perl->Iminus_l;
9910 PL_minus_a = proto_perl->Iminus_a;
9911 PL_minus_F = proto_perl->Iminus_F;
9912 PL_doswitches = proto_perl->Idoswitches;
9913 PL_dowarn = proto_perl->Idowarn;
9914 PL_doextract = proto_perl->Idoextract;
9915 PL_sawampersand = proto_perl->Isawampersand;
9916 PL_unsafe = proto_perl->Iunsafe;
9917 PL_inplace = SAVEPV(proto_perl->Iinplace);
9918 PL_e_script = sv_dup_inc(proto_perl->Ie_script, param);
9919 PL_perldb = proto_perl->Iperldb;
9920 PL_perl_destruct_level = proto_perl->Iperl_destruct_level;
9921 PL_exit_flags = proto_perl->Iexit_flags;
9923 /* magical thingies */
9924 /* XXX time(&PL_basetime) when asked for? */
9925 PL_basetime = proto_perl->Ibasetime;
9926 PL_formfeed = sv_dup(proto_perl->Iformfeed, param);
9928 PL_maxsysfd = proto_perl->Imaxsysfd;
9929 PL_multiline = proto_perl->Imultiline;
9930 PL_statusvalue = proto_perl->Istatusvalue;
9932 PL_statusvalue_vms = proto_perl->Istatusvalue_vms;
9934 PL_encoding = sv_dup(proto_perl->Iencoding, param);
9936 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
9937 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
9938 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
9940 /* Clone the regex array */
9941 PL_regex_padav = newAV();
9943 I32 len = av_len((AV*)proto_perl->Iregex_padav);
9944 SV** regexen = AvARRAY((AV*)proto_perl->Iregex_padav);
9945 av_push(PL_regex_padav,
9946 sv_dup_inc(regexen[0],param));
9947 for(i = 1; i <= len; i++) {
9948 if(SvREPADTMP(regexen[i])) {
9949 av_push(PL_regex_padav, sv_dup_inc(regexen[i], param));
9951 av_push(PL_regex_padav,
9953 newSViv(PTR2IV(re_dup(INT2PTR(REGEXP *,
9954 SvIVX(regexen[i])), param)))
9959 PL_regex_pad = AvARRAY(PL_regex_padav);
9961 /* shortcuts to various I/O objects */
9962 PL_stdingv = gv_dup(proto_perl->Istdingv, param);
9963 PL_stderrgv = gv_dup(proto_perl->Istderrgv, param);
9964 PL_defgv = gv_dup(proto_perl->Idefgv, param);
9965 PL_argvgv = gv_dup(proto_perl->Iargvgv, param);
9966 PL_argvoutgv = gv_dup(proto_perl->Iargvoutgv, param);
9967 PL_argvout_stack = av_dup_inc(proto_perl->Iargvout_stack, param);
9969 /* shortcuts to regexp stuff */
9970 PL_replgv = gv_dup(proto_perl->Ireplgv, param);
9972 /* shortcuts to misc objects */
9973 PL_errgv = gv_dup(proto_perl->Ierrgv, param);
9975 /* shortcuts to debugging objects */
9976 PL_DBgv = gv_dup(proto_perl->IDBgv, param);
9977 PL_DBline = gv_dup(proto_perl->IDBline, param);
9978 PL_DBsub = gv_dup(proto_perl->IDBsub, param);
9979 PL_DBsingle = sv_dup(proto_perl->IDBsingle, param);
9980 PL_DBtrace = sv_dup(proto_perl->IDBtrace, param);
9981 PL_DBsignal = sv_dup(proto_perl->IDBsignal, param);
9982 PL_lineary = av_dup(proto_perl->Ilineary, param);
9983 PL_dbargs = av_dup(proto_perl->Idbargs, param);
9986 PL_defstash = hv_dup_inc(proto_perl->Tdefstash, param);
9987 PL_curstash = hv_dup(proto_perl->Tcurstash, param);
9988 PL_nullstash = hv_dup(proto_perl->Inullstash, param);
9989 PL_debstash = hv_dup(proto_perl->Idebstash, param);
9990 PL_globalstash = hv_dup(proto_perl->Iglobalstash, param);
9991 PL_curstname = sv_dup_inc(proto_perl->Icurstname, param);
9993 PL_beginav = av_dup_inc(proto_perl->Ibeginav, param);
9994 PL_beginav_save = av_dup_inc(proto_perl->Ibeginav_save, param);
9995 PL_endav = av_dup_inc(proto_perl->Iendav, param);
9996 PL_checkav = av_dup_inc(proto_perl->Icheckav, param);
9997 PL_initav = av_dup_inc(proto_perl->Iinitav, param);
9999 PL_sub_generation = proto_perl->Isub_generation;
10001 /* funky return mechanisms */
10002 PL_forkprocess = proto_perl->Iforkprocess;
10004 /* subprocess state */
10005 PL_fdpid = av_dup_inc(proto_perl->Ifdpid, param);
10007 /* internal state */
10008 PL_tainting = proto_perl->Itainting;
10009 PL_maxo = proto_perl->Imaxo;
10010 if (proto_perl->Iop_mask)
10011 PL_op_mask = SAVEPVN(proto_perl->Iop_mask, PL_maxo);
10013 PL_op_mask = Nullch;
10015 /* current interpreter roots */
10016 PL_main_cv = cv_dup_inc(proto_perl->Imain_cv, param);
10017 PL_main_root = OpREFCNT_inc(proto_perl->Imain_root);
10018 PL_main_start = proto_perl->Imain_start;
10019 PL_eval_root = proto_perl->Ieval_root;
10020 PL_eval_start = proto_perl->Ieval_start;
10022 /* runtime control stuff */
10023 PL_curcopdb = (COP*)any_dup(proto_perl->Icurcopdb, proto_perl);
10024 PL_copline = proto_perl->Icopline;
10026 PL_filemode = proto_perl->Ifilemode;
10027 PL_lastfd = proto_perl->Ilastfd;
10028 PL_oldname = proto_perl->Ioldname; /* XXX not quite right */
10031 PL_gensym = proto_perl->Igensym;
10032 PL_preambled = proto_perl->Ipreambled;
10033 PL_preambleav = av_dup_inc(proto_perl->Ipreambleav, param);
10034 PL_laststatval = proto_perl->Ilaststatval;
10035 PL_laststype = proto_perl->Ilaststype;
10036 PL_mess_sv = Nullsv;
10038 PL_ors_sv = sv_dup_inc(proto_perl->Iors_sv, param);
10039 PL_ofmt = SAVEPV(proto_perl->Iofmt);
10041 /* interpreter atexit processing */
10042 PL_exitlistlen = proto_perl->Iexitlistlen;
10043 if (PL_exitlistlen) {
10044 New(0, PL_exitlist, PL_exitlistlen, PerlExitListEntry);
10045 Copy(proto_perl->Iexitlist, PL_exitlist, PL_exitlistlen, PerlExitListEntry);
10048 PL_exitlist = (PerlExitListEntry*)NULL;
10049 PL_modglobal = hv_dup_inc(proto_perl->Imodglobal, param);
10050 PL_custom_op_names = hv_dup_inc(proto_perl->Icustom_op_names,param);
10051 PL_custom_op_descs = hv_dup_inc(proto_perl->Icustom_op_descs,param);
10053 PL_profiledata = NULL;
10054 PL_rsfp = fp_dup(proto_perl->Irsfp, '<', param);
10055 /* PL_rsfp_filters entries have fake IoDIRP() */
10056 PL_rsfp_filters = av_dup_inc(proto_perl->Irsfp_filters, param);
10058 PL_compcv = cv_dup(proto_perl->Icompcv, param);
10059 PL_comppad = av_dup(proto_perl->Icomppad, param);
10060 PL_comppad_name = av_dup(proto_perl->Icomppad_name, param);
10061 PL_comppad_name_fill = proto_perl->Icomppad_name_fill;
10062 PL_comppad_name_floor = proto_perl->Icomppad_name_floor;
10063 PL_curpad = (SV**)ptr_table_fetch(PL_ptr_table,
10064 proto_perl->Tcurpad);
10066 #ifdef HAVE_INTERP_INTERN
10067 sys_intern_dup(&proto_perl->Isys_intern, &PL_sys_intern);
10070 /* more statics moved here */
10071 PL_generation = proto_perl->Igeneration;
10072 PL_DBcv = cv_dup(proto_perl->IDBcv, param);
10074 PL_in_clean_objs = proto_perl->Iin_clean_objs;
10075 PL_in_clean_all = proto_perl->Iin_clean_all;
10077 PL_uid = proto_perl->Iuid;
10078 PL_euid = proto_perl->Ieuid;
10079 PL_gid = proto_perl->Igid;
10080 PL_egid = proto_perl->Iegid;
10081 PL_nomemok = proto_perl->Inomemok;
10082 PL_an = proto_perl->Ian;
10083 PL_cop_seqmax = proto_perl->Icop_seqmax;
10084 PL_op_seqmax = proto_perl->Iop_seqmax;
10085 PL_evalseq = proto_perl->Ievalseq;
10086 PL_origenviron = proto_perl->Iorigenviron; /* XXX not quite right */
10087 PL_origalen = proto_perl->Iorigalen;
10088 PL_pidstatus = newHV(); /* XXX flag for cloning? */
10089 PL_osname = SAVEPV(proto_perl->Iosname);
10090 PL_sh_path = proto_perl->Ish_path; /* XXX never deallocated */
10091 PL_sighandlerp = proto_perl->Isighandlerp;
10094 PL_runops = proto_perl->Irunops;
10096 Copy(proto_perl->Itokenbuf, PL_tokenbuf, 256, char);
10099 PL_cshlen = proto_perl->Icshlen;
10100 PL_cshname = proto_perl->Icshname; /* XXX never deallocated */
10103 PL_lex_state = proto_perl->Ilex_state;
10104 PL_lex_defer = proto_perl->Ilex_defer;
10105 PL_lex_expect = proto_perl->Ilex_expect;
10106 PL_lex_formbrack = proto_perl->Ilex_formbrack;
10107 PL_lex_dojoin = proto_perl->Ilex_dojoin;
10108 PL_lex_starts = proto_perl->Ilex_starts;
10109 PL_lex_stuff = sv_dup_inc(proto_perl->Ilex_stuff, param);
10110 PL_lex_repl = sv_dup_inc(proto_perl->Ilex_repl, param);
10111 PL_lex_op = proto_perl->Ilex_op;
10112 PL_lex_inpat = proto_perl->Ilex_inpat;
10113 PL_lex_inwhat = proto_perl->Ilex_inwhat;
10114 PL_lex_brackets = proto_perl->Ilex_brackets;
10115 i = (PL_lex_brackets < 120 ? 120 : PL_lex_brackets);
10116 PL_lex_brackstack = SAVEPVN(proto_perl->Ilex_brackstack,i);
10117 PL_lex_casemods = proto_perl->Ilex_casemods;
10118 i = (PL_lex_casemods < 12 ? 12 : PL_lex_casemods);
10119 PL_lex_casestack = SAVEPVN(proto_perl->Ilex_casestack,i);
10121 Copy(proto_perl->Inextval, PL_nextval, 5, YYSTYPE);
10122 Copy(proto_perl->Inexttype, PL_nexttype, 5, I32);
10123 PL_nexttoke = proto_perl->Inexttoke;
10125 PL_linestr = sv_dup_inc(proto_perl->Ilinestr, param);
10126 i = proto_perl->Ibufptr - SvPVX(proto_perl->Ilinestr);
10127 PL_bufptr = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10128 i = proto_perl->Ioldbufptr - SvPVX(proto_perl->Ilinestr);
10129 PL_oldbufptr = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10130 i = proto_perl->Ioldoldbufptr - SvPVX(proto_perl->Ilinestr);
10131 PL_oldoldbufptr = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10132 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
10133 i = proto_perl->Ilinestart - SvPVX(proto_perl->Ilinestr);
10134 PL_linestart = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10135 PL_pending_ident = proto_perl->Ipending_ident;
10136 PL_sublex_info = proto_perl->Isublex_info; /* XXX not quite right */
10138 PL_expect = proto_perl->Iexpect;
10140 PL_multi_start = proto_perl->Imulti_start;
10141 PL_multi_end = proto_perl->Imulti_end;
10142 PL_multi_open = proto_perl->Imulti_open;
10143 PL_multi_close = proto_perl->Imulti_close;
10145 PL_error_count = proto_perl->Ierror_count;
10146 PL_subline = proto_perl->Isubline;
10147 PL_subname = sv_dup_inc(proto_perl->Isubname, param);
10149 PL_min_intro_pending = proto_perl->Imin_intro_pending;
10150 PL_max_intro_pending = proto_perl->Imax_intro_pending;
10151 PL_padix = proto_perl->Ipadix;
10152 PL_padix_floor = proto_perl->Ipadix_floor;
10153 PL_pad_reset_pending = proto_perl->Ipad_reset_pending;
10155 i = proto_perl->Ilast_uni - SvPVX(proto_perl->Ilinestr);
10156 PL_last_uni = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10157 i = proto_perl->Ilast_lop - SvPVX(proto_perl->Ilinestr);
10158 PL_last_lop = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10159 PL_last_lop_op = proto_perl->Ilast_lop_op;
10160 PL_in_my = proto_perl->Iin_my;
10161 PL_in_my_stash = hv_dup(proto_perl->Iin_my_stash, param);
10163 PL_cryptseen = proto_perl->Icryptseen;
10166 PL_hints = proto_perl->Ihints;
10168 PL_amagic_generation = proto_perl->Iamagic_generation;
10170 #ifdef USE_LOCALE_COLLATE
10171 PL_collation_ix = proto_perl->Icollation_ix;
10172 PL_collation_name = SAVEPV(proto_perl->Icollation_name);
10173 PL_collation_standard = proto_perl->Icollation_standard;
10174 PL_collxfrm_base = proto_perl->Icollxfrm_base;
10175 PL_collxfrm_mult = proto_perl->Icollxfrm_mult;
10176 #endif /* USE_LOCALE_COLLATE */
10178 #ifdef USE_LOCALE_NUMERIC
10179 PL_numeric_name = SAVEPV(proto_perl->Inumeric_name);
10180 PL_numeric_standard = proto_perl->Inumeric_standard;
10181 PL_numeric_local = proto_perl->Inumeric_local;
10182 PL_numeric_radix_sv = sv_dup_inc(proto_perl->Inumeric_radix_sv, param);
10183 #endif /* !USE_LOCALE_NUMERIC */
10185 /* utf8 character classes */
10186 PL_utf8_alnum = sv_dup_inc(proto_perl->Iutf8_alnum, param);
10187 PL_utf8_alnumc = sv_dup_inc(proto_perl->Iutf8_alnumc, param);
10188 PL_utf8_ascii = sv_dup_inc(proto_perl->Iutf8_ascii, param);
10189 PL_utf8_alpha = sv_dup_inc(proto_perl->Iutf8_alpha, param);
10190 PL_utf8_space = sv_dup_inc(proto_perl->Iutf8_space, param);
10191 PL_utf8_cntrl = sv_dup_inc(proto_perl->Iutf8_cntrl, param);
10192 PL_utf8_graph = sv_dup_inc(proto_perl->Iutf8_graph, param);
10193 PL_utf8_digit = sv_dup_inc(proto_perl->Iutf8_digit, param);
10194 PL_utf8_upper = sv_dup_inc(proto_perl->Iutf8_upper, param);
10195 PL_utf8_lower = sv_dup_inc(proto_perl->Iutf8_lower, param);
10196 PL_utf8_print = sv_dup_inc(proto_perl->Iutf8_print, param);
10197 PL_utf8_punct = sv_dup_inc(proto_perl->Iutf8_punct, param);
10198 PL_utf8_xdigit = sv_dup_inc(proto_perl->Iutf8_xdigit, param);
10199 PL_utf8_mark = sv_dup_inc(proto_perl->Iutf8_mark, param);
10200 PL_utf8_toupper = sv_dup_inc(proto_perl->Iutf8_toupper, param);
10201 PL_utf8_totitle = sv_dup_inc(proto_perl->Iutf8_totitle, param);
10202 PL_utf8_tolower = sv_dup_inc(proto_perl->Iutf8_tolower, param);
10203 PL_utf8_tofold = sv_dup_inc(proto_perl->Iutf8_tofold, param);
10204 PL_utf8_idstart = sv_dup_inc(proto_perl->Iutf8_idstart, param);
10205 PL_utf8_idcont = sv_dup_inc(proto_perl->Iutf8_idcont, param);
10208 PL_last_swash_hv = Nullhv; /* reinits on demand */
10209 PL_last_swash_klen = 0;
10210 PL_last_swash_key[0]= '\0';
10211 PL_last_swash_tmps = (U8*)NULL;
10212 PL_last_swash_slen = 0;
10214 /* perly.c globals */
10215 PL_yydebug = proto_perl->Iyydebug;
10216 PL_yynerrs = proto_perl->Iyynerrs;
10217 PL_yyerrflag = proto_perl->Iyyerrflag;
10218 PL_yychar = proto_perl->Iyychar;
10219 PL_yyval = proto_perl->Iyyval;
10220 PL_yylval = proto_perl->Iyylval;
10222 PL_glob_index = proto_perl->Iglob_index;
10223 PL_srand_called = proto_perl->Isrand_called;
10224 PL_uudmap['M'] = 0; /* reinits on demand */
10225 PL_bitcount = Nullch; /* reinits on demand */
10227 if (proto_perl->Ipsig_pend) {
10228 Newz(0, PL_psig_pend, SIG_SIZE, int);
10231 PL_psig_pend = (int*)NULL;
10234 if (proto_perl->Ipsig_ptr) {
10235 Newz(0, PL_psig_ptr, SIG_SIZE, SV*);
10236 Newz(0, PL_psig_name, SIG_SIZE, SV*);
10237 for (i = 1; i < SIG_SIZE; i++) {
10238 PL_psig_ptr[i] = sv_dup_inc(proto_perl->Ipsig_ptr[i], param);
10239 PL_psig_name[i] = sv_dup_inc(proto_perl->Ipsig_name[i], param);
10243 PL_psig_ptr = (SV**)NULL;
10244 PL_psig_name = (SV**)NULL;
10247 /* thrdvar.h stuff */
10249 if (flags & CLONEf_COPY_STACKS) {
10250 /* next allocation will be PL_tmps_stack[PL_tmps_ix+1] */
10251 PL_tmps_ix = proto_perl->Ttmps_ix;
10252 PL_tmps_max = proto_perl->Ttmps_max;
10253 PL_tmps_floor = proto_perl->Ttmps_floor;
10254 Newz(50, PL_tmps_stack, PL_tmps_max, SV*);
10256 while (i <= PL_tmps_ix) {
10257 PL_tmps_stack[i] = sv_dup_inc(proto_perl->Ttmps_stack[i], param);
10261 /* next PUSHMARK() sets *(PL_markstack_ptr+1) */
10262 i = proto_perl->Tmarkstack_max - proto_perl->Tmarkstack;
10263 Newz(54, PL_markstack, i, I32);
10264 PL_markstack_max = PL_markstack + (proto_perl->Tmarkstack_max
10265 - proto_perl->Tmarkstack);
10266 PL_markstack_ptr = PL_markstack + (proto_perl->Tmarkstack_ptr
10267 - proto_perl->Tmarkstack);
10268 Copy(proto_perl->Tmarkstack, PL_markstack,
10269 PL_markstack_ptr - PL_markstack + 1, I32);
10271 /* next push_scope()/ENTER sets PL_scopestack[PL_scopestack_ix]
10272 * NOTE: unlike the others! */
10273 PL_scopestack_ix = proto_perl->Tscopestack_ix;
10274 PL_scopestack_max = proto_perl->Tscopestack_max;
10275 Newz(54, PL_scopestack, PL_scopestack_max, I32);
10276 Copy(proto_perl->Tscopestack, PL_scopestack, PL_scopestack_ix, I32);
10278 /* next push_return() sets PL_retstack[PL_retstack_ix]
10279 * NOTE: unlike the others! */
10280 PL_retstack_ix = proto_perl->Tretstack_ix;
10281 PL_retstack_max = proto_perl->Tretstack_max;
10282 Newz(54, PL_retstack, PL_retstack_max, OP*);
10283 Copy(proto_perl->Tretstack, PL_retstack, PL_retstack_ix, OP*);
10285 /* NOTE: si_dup() looks at PL_markstack */
10286 PL_curstackinfo = si_dup(proto_perl->Tcurstackinfo, param);
10288 /* PL_curstack = PL_curstackinfo->si_stack; */
10289 PL_curstack = av_dup(proto_perl->Tcurstack, param);
10290 PL_mainstack = av_dup(proto_perl->Tmainstack, param);
10292 /* next PUSHs() etc. set *(PL_stack_sp+1) */
10293 PL_stack_base = AvARRAY(PL_curstack);
10294 PL_stack_sp = PL_stack_base + (proto_perl->Tstack_sp
10295 - proto_perl->Tstack_base);
10296 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
10298 /* next SSPUSHFOO() sets PL_savestack[PL_savestack_ix]
10299 * NOTE: unlike the others! */
10300 PL_savestack_ix = proto_perl->Tsavestack_ix;
10301 PL_savestack_max = proto_perl->Tsavestack_max;
10302 /*Newz(54, PL_savestack, PL_savestack_max, ANY);*/
10303 PL_savestack = ss_dup(proto_perl, param);
10307 ENTER; /* perl_destruct() wants to LEAVE; */
10310 PL_start_env = proto_perl->Tstart_env; /* XXXXXX */
10311 PL_top_env = &PL_start_env;
10313 PL_op = proto_perl->Top;
10316 PL_Xpv = (XPV*)NULL;
10317 PL_na = proto_perl->Tna;
10319 PL_statbuf = proto_perl->Tstatbuf;
10320 PL_statcache = proto_perl->Tstatcache;
10321 PL_statgv = gv_dup(proto_perl->Tstatgv, param);
10322 PL_statname = sv_dup_inc(proto_perl->Tstatname, param);
10324 PL_timesbuf = proto_perl->Ttimesbuf;
10327 PL_tainted = proto_perl->Ttainted;
10328 PL_curpm = proto_perl->Tcurpm; /* XXX No PMOP ref count */
10329 PL_rs = sv_dup_inc(proto_perl->Trs, param);
10330 PL_last_in_gv = gv_dup(proto_perl->Tlast_in_gv, param);
10331 PL_ofs_sv = sv_dup_inc(proto_perl->Tofs_sv, param);
10332 PL_defoutgv = gv_dup_inc(proto_perl->Tdefoutgv, param);
10333 PL_chopset = proto_perl->Tchopset; /* XXX never deallocated */
10334 PL_toptarget = sv_dup_inc(proto_perl->Ttoptarget, param);
10335 PL_bodytarget = sv_dup_inc(proto_perl->Tbodytarget, param);
10336 PL_formtarget = sv_dup(proto_perl->Tformtarget, param);
10338 PL_restartop = proto_perl->Trestartop;
10339 PL_in_eval = proto_perl->Tin_eval;
10340 PL_delaymagic = proto_perl->Tdelaymagic;
10341 PL_dirty = proto_perl->Tdirty;
10342 PL_localizing = proto_perl->Tlocalizing;
10344 #ifdef PERL_FLEXIBLE_EXCEPTIONS
10345 PL_protect = proto_perl->Tprotect;
10347 PL_errors = sv_dup_inc(proto_perl->Terrors, param);
10348 PL_av_fetch_sv = Nullsv;
10349 PL_hv_fetch_sv = Nullsv;
10350 Zero(&PL_hv_fetch_ent_mh, 1, HE); /* XXX */
10351 PL_modcount = proto_perl->Tmodcount;
10352 PL_lastgotoprobe = Nullop;
10353 PL_dumpindent = proto_perl->Tdumpindent;
10355 PL_sortcop = (OP*)any_dup(proto_perl->Tsortcop, proto_perl);
10356 PL_sortstash = hv_dup(proto_perl->Tsortstash, param);
10357 PL_firstgv = gv_dup(proto_perl->Tfirstgv, param);
10358 PL_secondgv = gv_dup(proto_perl->Tsecondgv, param);
10359 PL_sortcxix = proto_perl->Tsortcxix;
10360 PL_efloatbuf = Nullch; /* reinits on demand */
10361 PL_efloatsize = 0; /* reinits on demand */
10365 PL_screamfirst = NULL;
10366 PL_screamnext = NULL;
10367 PL_maxscream = -1; /* reinits on demand */
10368 PL_lastscream = Nullsv;
10370 PL_watchaddr = NULL;
10371 PL_watchok = Nullch;
10373 PL_regdummy = proto_perl->Tregdummy;
10374 PL_regcomp_parse = Nullch;
10375 PL_regxend = Nullch;
10376 PL_regcode = (regnode*)NULL;
10379 PL_regprecomp = Nullch;
10384 PL_seen_zerolen = 0;
10386 PL_regcomp_rx = (regexp*)NULL;
10388 PL_colorset = 0; /* reinits PL_colors[] */
10389 /*PL_colors[6] = {0,0,0,0,0,0};*/
10390 PL_reg_whilem_seen = 0;
10391 PL_reginput = Nullch;
10392 PL_regbol = Nullch;
10393 PL_regeol = Nullch;
10394 PL_regstartp = (I32*)NULL;
10395 PL_regendp = (I32*)NULL;
10396 PL_reglastparen = (U32*)NULL;
10397 PL_regtill = Nullch;
10398 PL_reg_start_tmp = (char**)NULL;
10399 PL_reg_start_tmpl = 0;
10400 PL_regdata = (struct reg_data*)NULL;
10403 PL_reg_eval_set = 0;
10405 PL_regprogram = (regnode*)NULL;
10407 PL_regcc = (CURCUR*)NULL;
10408 PL_reg_call_cc = (struct re_cc_state*)NULL;
10409 PL_reg_re = (regexp*)NULL;
10410 PL_reg_ganch = Nullch;
10411 PL_reg_sv = Nullsv;
10412 PL_reg_match_utf8 = FALSE;
10413 PL_reg_magic = (MAGIC*)NULL;
10415 PL_reg_oldcurpm = (PMOP*)NULL;
10416 PL_reg_curpm = (PMOP*)NULL;
10417 PL_reg_oldsaved = Nullch;
10418 PL_reg_oldsavedlen = 0;
10419 PL_reg_maxiter = 0;
10420 PL_reg_leftiter = 0;
10421 PL_reg_poscache = Nullch;
10422 PL_reg_poscache_size= 0;
10424 /* RE engine - function pointers */
10425 PL_regcompp = proto_perl->Tregcompp;
10426 PL_regexecp = proto_perl->Tregexecp;
10427 PL_regint_start = proto_perl->Tregint_start;
10428 PL_regint_string = proto_perl->Tregint_string;
10429 PL_regfree = proto_perl->Tregfree;
10431 PL_reginterp_cnt = 0;
10432 PL_reg_starttry = 0;
10434 /* Pluggable optimizer */
10435 PL_peepp = proto_perl->Tpeepp;
10437 if (!(flags & CLONEf_KEEP_PTR_TABLE)) {
10438 ptr_table_free(PL_ptr_table);
10439 PL_ptr_table = NULL;
10442 /* Call the ->CLONE method, if it exists, for each of the stashes
10443 identified by sv_dup() above.
10445 while(av_len(param->stashes) != -1) {
10446 HV* stash = (HV*) av_shift(param->stashes);
10447 GV* cloner = gv_fetchmethod_autoload(stash, "CLONE", 0);
10448 if (cloner && GvCV(cloner)) {
10453 XPUSHs(sv_2mortal(newSVpv(HvNAME(stash), 0)));
10455 call_sv((SV*)GvCV(cloner), G_DISCARD);
10461 SvREFCNT_dec(param->stashes);
10466 #endif /* USE_ITHREADS */
10469 =head1 Unicode Support
10471 =for apidoc sv_recode_to_utf8
10473 The encoding is assumed to be an Encode object, on entry the PV
10474 of the sv is assumed to be octets in that encoding, and the sv
10475 will be converted into Unicode (and UTF-8).
10477 If the sv already is UTF-8 (or if it is not POK), or if the encoding
10478 is not a reference, nothing is done to the sv. If the encoding is not
10479 an C<Encode::XS> Encoding object, bad things will happen.
10480 (See F<lib/encoding.pm> and L<Encode>).
10482 The PV of the sv is returned.
10487 Perl_sv_recode_to_utf8(pTHX_ SV *sv, SV *encoding)
10489 if (SvPOK(sv) && !DO_UTF8(sv) && SvROK(encoding)) {
10500 XPUSHs(&PL_sv_yes);
10502 call_method("decode", G_SCALAR);
10506 s = SvPV(uni, len);
10507 if (s != SvPVX(sv)) {
10509 Move(s, SvPVX(sv), len, char);
10510 SvCUR_set(sv, len);