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' + (uv % 10);
2878 /* For backwards-compatibility only. sv_2pv() is normally #def'ed to
2879 * C<sv_2pv_macro()>. See also C<sv_2pv_flags()>.
2883 Perl_sv_2pv(pTHX_ register SV *sv, STRLEN *lp)
2885 return sv_2pv_flags(sv, lp, SV_GMAGIC);
2889 =for apidoc sv_2pv_flags
2891 Returns a pointer to the string value of an SV, and sets *lp to its length.
2892 If flags includes SV_GMAGIC, does an mg_get() first. Coerces sv to a string
2894 Normally invoked via the C<SvPV_flags> macro. C<sv_2pv()> and C<sv_2pv_nomg>
2895 usually end up here too.
2901 Perl_sv_2pv_flags(pTHX_ register SV *sv, STRLEN *lp, I32 flags)
2906 char tbuf[64]; /* Must fit sprintf/Gconvert of longest IV/NV */
2907 char *tmpbuf = tbuf;
2913 if (SvGMAGICAL(sv)) {
2914 if (flags & SV_GMAGIC)
2922 (void)sprintf(tmpbuf,"%"UVuf, (UV)SvUVX(sv));
2924 (void)sprintf(tmpbuf,"%"IVdf, (IV)SvIVX(sv));
2929 Gconvert(SvNVX(sv), NV_DIG, 0, tmpbuf);
2934 if (!(SvFLAGS(sv) & SVs_PADTMP)) {
2935 if (ckWARN(WARN_UNINITIALIZED) && !PL_localizing)
2942 if (SvTHINKFIRST(sv)) {
2945 if (SvAMAGIC(sv) && (tmpstr=AMG_CALLun(sv,string)) &&
2946 (SvTYPE(tmpstr) != SVt_RV || (SvRV(tmpstr) != SvRV(sv))))
2947 return SvPV(tmpstr,*lp);
2954 switch (SvTYPE(sv)) {
2956 if ( ((SvFLAGS(sv) &
2957 (SVs_OBJECT|SVf_OK|SVs_GMG|SVs_SMG|SVs_RMG))
2958 == (SVs_OBJECT|SVs_RMG))
2959 && strEQ(s=HvNAME(SvSTASH(sv)), "Regexp")
2960 && (mg = mg_find(sv, PERL_MAGIC_qr))) {
2961 regexp *re = (regexp *)mg->mg_obj;
2964 char *fptr = "msix";
2969 U16 reganch = (re->reganch & PMf_COMPILETIME) >> 12;
2971 while((ch = *fptr++)) {
2973 reflags[left++] = ch;
2976 reflags[right--] = ch;
2981 reflags[left] = '-';
2985 mg->mg_len = re->prelen + 4 + left;
2986 New(616, mg->mg_ptr, mg->mg_len + 1 + left, char);
2987 Copy("(?", mg->mg_ptr, 2, char);
2988 Copy(reflags, mg->mg_ptr+2, left, char);
2989 Copy(":", mg->mg_ptr+left+2, 1, char);
2990 Copy(re->precomp, mg->mg_ptr+3+left, re->prelen, char);
2991 mg->mg_ptr[mg->mg_len - 1] = ')';
2992 mg->mg_ptr[mg->mg_len] = 0;
2994 PL_reginterp_cnt += re->program[0].next_off;
3006 case SVt_PVBM: if (SvROK(sv))
3009 s = "SCALAR"; break;
3010 case SVt_PVLV: s = "LVALUE"; break;
3011 case SVt_PVAV: s = "ARRAY"; break;
3012 case SVt_PVHV: s = "HASH"; break;
3013 case SVt_PVCV: s = "CODE"; break;
3014 case SVt_PVGV: s = "GLOB"; break;
3015 case SVt_PVFM: s = "FORMAT"; break;
3016 case SVt_PVIO: s = "IO"; break;
3017 default: s = "UNKNOWN"; break;
3021 HV *svs = SvSTASH(sv);
3024 /* [20011101.072] This bandaid for C<package;>
3025 should eventually be removed. AMS 20011103 */
3026 (svs ? HvNAME(svs) : "<none>"), s
3031 Perl_sv_catpvf(aTHX_ tsv, "(0x%"UVxf")", PTR2UV(sv));
3037 if (SvREADONLY(sv) && !SvOK(sv)) {
3038 if (ckWARN(WARN_UNINITIALIZED))
3044 if (SvIOK(sv) || ((SvIOKp(sv) && !SvNOKp(sv)))) {
3045 /* I'm assuming that if both IV and NV are equally valid then
3046 converting the IV is going to be more efficient */
3047 U32 isIOK = SvIOK(sv);
3048 U32 isUIOK = SvIsUV(sv);
3049 char buf[TYPE_CHARS(UV)];
3052 if (SvTYPE(sv) < SVt_PVIV)
3053 sv_upgrade(sv, SVt_PVIV);
3055 ptr = uiv_2buf(buf, 0, SvUVX(sv), 1, &ebuf);
3057 ptr = uiv_2buf(buf, SvIVX(sv), 0, 0, &ebuf);
3058 SvGROW(sv, ebuf - ptr + 1); /* inlined from sv_setpvn */
3059 Move(ptr,SvPVX(sv),ebuf - ptr,char);
3060 SvCUR_set(sv, ebuf - ptr);
3070 else if (SvNOKp(sv)) {
3071 if (SvTYPE(sv) < SVt_PVNV)
3072 sv_upgrade(sv, SVt_PVNV);
3073 /* The +20 is pure guesswork. Configure test needed. --jhi */
3074 SvGROW(sv, NV_DIG + 20);
3076 olderrno = errno; /* some Xenix systems wipe out errno here */
3078 if (SvNVX(sv) == 0.0)
3079 (void)strcpy(s,"0");
3083 Gconvert(SvNVX(sv), NV_DIG, 0, s);
3086 #ifdef FIXNEGATIVEZERO
3087 if (*s == '-' && s[1] == '0' && !s[2])
3097 if (ckWARN(WARN_UNINITIALIZED)
3098 && !PL_localizing && !(SvFLAGS(sv) & SVs_PADTMP))
3101 if (SvTYPE(sv) < SVt_PV)
3102 /* Typically the caller expects that sv_any is not NULL now. */
3103 sv_upgrade(sv, SVt_PV);
3106 *lp = s - SvPVX(sv);
3109 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2pv(%s)\n",
3110 PTR2UV(sv),SvPVX(sv)));
3114 if (SvROK(sv)) { /* XXX Skip this when sv_pvn_force calls */
3115 /* Sneaky stuff here */
3119 tsv = newSVpv(tmpbuf, 0);
3135 len = strlen(tmpbuf);
3137 #ifdef FIXNEGATIVEZERO
3138 if (len == 2 && t[0] == '-' && t[1] == '0') {
3143 (void)SvUPGRADE(sv, SVt_PV);
3145 s = SvGROW(sv, len + 1);
3154 =for apidoc sv_copypv
3156 Copies a stringified representation of the source SV into the
3157 destination SV. Automatically performs any necessary mg_get and
3158 coercion of numeric values into strings. Guaranteed to preserve
3159 UTF-8 flag even from overloaded objects. Similar in nature to
3160 sv_2pv[_flags] but operates directly on an SV instead of just the
3161 string. Mostly uses sv_2pv_flags to do its work, except when that
3162 would lose the UTF-8'ness of the PV.
3168 Perl_sv_copypv(pTHX_ SV *dsv, register SV *ssv)
3170 SV *tmpsv = sv_newmortal();
3172 if ( SvTHINKFIRST(ssv) && SvROK(ssv) && SvAMAGIC(ssv) ) {
3173 tmpsv = AMG_CALLun(ssv,string);
3174 if (SvTYPE(tmpsv) != SVt_RV || (SvRV(tmpsv) != SvRV(ssv))) {
3183 sv_setpvn(tmpsv,s,len);
3193 =for apidoc sv_2pvbyte_nolen
3195 Return a pointer to the byte-encoded representation of the SV.
3196 May cause the SV to be downgraded from UTF8 as a side-effect.
3198 Usually accessed via the C<SvPVbyte_nolen> macro.
3204 Perl_sv_2pvbyte_nolen(pTHX_ register SV *sv)
3207 return sv_2pvbyte(sv, &n_a);
3211 =for apidoc sv_2pvbyte
3213 Return a pointer to the byte-encoded representation of the SV, and set *lp
3214 to its length. May cause the SV to be downgraded from UTF8 as a
3217 Usually accessed via the C<SvPVbyte> macro.
3223 Perl_sv_2pvbyte(pTHX_ register SV *sv, STRLEN *lp)
3225 sv_utf8_downgrade(sv,0);
3226 return SvPV(sv,*lp);
3230 =for apidoc sv_2pvutf8_nolen
3232 Return a pointer to the UTF8-encoded representation of the SV.
3233 May cause the SV to be upgraded to UTF8 as a side-effect.
3235 Usually accessed via the C<SvPVutf8_nolen> macro.
3241 Perl_sv_2pvutf8_nolen(pTHX_ register SV *sv)
3244 return sv_2pvutf8(sv, &n_a);
3248 =for apidoc sv_2pvutf8
3250 Return a pointer to the UTF8-encoded representation of the SV, and set *lp
3251 to its length. May cause the SV to be upgraded to UTF8 as a side-effect.
3253 Usually accessed via the C<SvPVutf8> macro.
3259 Perl_sv_2pvutf8(pTHX_ register SV *sv, STRLEN *lp)
3261 sv_utf8_upgrade(sv);
3262 return SvPV(sv,*lp);
3266 =for apidoc sv_2bool
3268 This function is only called on magical items, and is only used by
3269 sv_true() or its macro equivalent.
3275 Perl_sv_2bool(pTHX_ register SV *sv)
3284 if (SvAMAGIC(sv) && (tmpsv=AMG_CALLun(sv,bool_)) &&
3285 (!SvROK(tmpsv) || (SvRV(tmpsv) != SvRV(sv))))
3286 return SvTRUE(tmpsv);
3287 return SvRV(sv) != 0;
3290 register XPV* Xpvtmp;
3291 if ((Xpvtmp = (XPV*)SvANY(sv)) &&
3292 (*Xpvtmp->xpv_pv > '0' ||
3293 Xpvtmp->xpv_cur > 1 ||
3294 (Xpvtmp->xpv_cur && *Xpvtmp->xpv_pv != '0')))
3301 return SvIVX(sv) != 0;
3304 return SvNVX(sv) != 0.0;
3312 =for apidoc sv_utf8_upgrade
3314 Convert the PV of an SV to its UTF8-encoded form.
3315 Forces the SV to string form if it is not already.
3316 Always sets the SvUTF8 flag to avoid future validity checks even
3317 if all the bytes have hibit clear.
3319 This is not as a general purpose byte encoding to Unicode interface:
3320 use the Encode extension for that.
3326 Perl_sv_utf8_upgrade(pTHX_ register SV *sv)
3328 return sv_utf8_upgrade_flags(sv, SV_GMAGIC);
3332 =for apidoc sv_utf8_upgrade_flags
3334 Convert the PV of an SV to its UTF8-encoded form.
3335 Forces the SV to string form if it is not already.
3336 Always sets the SvUTF8 flag to avoid future validity checks even
3337 if all the bytes have hibit clear. If C<flags> has C<SV_GMAGIC> bit set,
3338 will C<mg_get> on C<sv> if appropriate, else not. C<sv_utf8_upgrade> and
3339 C<sv_utf8_upgrade_nomg> are implemented in terms of this function.
3341 This is not as a general purpose byte encoding to Unicode interface:
3342 use the Encode extension for that.
3348 Perl_sv_utf8_upgrade_flags(pTHX_ register SV *sv, I32 flags)
3358 (void) sv_2pv_flags(sv,&len, flags);
3366 if (SvREADONLY(sv) && SvFAKE(sv)) {
3367 sv_force_normal(sv);
3371 sv_recode_to_utf8(sv, PL_encoding);
3372 else { /* Assume Latin-1/EBCDIC */
3373 /* This function could be much more efficient if we
3374 * had a FLAG in SVs to signal if there are any hibit
3375 * chars in the PV. Given that there isn't such a flag
3376 * make the loop as fast as possible. */
3377 s = (U8 *) SvPVX(sv);
3378 e = (U8 *) SvEND(sv);
3382 if ((hibit = !NATIVE_IS_INVARIANT(ch)))
3388 len = SvCUR(sv) + 1; /* Plus the \0 */
3389 SvPVX(sv) = (char*)bytes_to_utf8((U8*)s, &len);
3390 SvCUR(sv) = len - 1;
3392 Safefree(s); /* No longer using what was there before. */
3393 SvLEN(sv) = len; /* No longer know the real size. */
3395 /* Mark as UTF-8 even if no hibit - saves scanning loop */
3402 =for apidoc sv_utf8_downgrade
3404 Attempt to convert the PV of an SV from UTF8-encoded to byte encoding.
3405 This may not be possible if the PV contains non-byte encoding characters;
3406 if this is the case, either returns false or, if C<fail_ok> is not
3409 This is not as a general purpose Unicode to byte encoding interface:
3410 use the Encode extension for that.
3416 Perl_sv_utf8_downgrade(pTHX_ register SV* sv, bool fail_ok)
3418 if (SvPOK(sv) && SvUTF8(sv)) {
3423 if (SvREADONLY(sv) && SvFAKE(sv))
3424 sv_force_normal(sv);
3425 s = (U8 *) SvPV(sv, len);
3426 if (!utf8_to_bytes(s, &len)) {
3431 Perl_croak(aTHX_ "Wide character in %s",
3434 Perl_croak(aTHX_ "Wide character");
3445 =for apidoc sv_utf8_encode
3447 Convert the PV of an SV to UTF8-encoded, but then turn off the C<SvUTF8>
3448 flag so that it looks like octets again. Used as a building block
3449 for encode_utf8 in Encode.xs
3455 Perl_sv_utf8_encode(pTHX_ register SV *sv)
3457 (void) sv_utf8_upgrade(sv);
3462 =for apidoc sv_utf8_decode
3464 Convert the octets in the PV from UTF-8 to chars. Scan for validity and then
3465 turn off SvUTF8 if needed so that we see characters. Used as a building block
3466 for decode_utf8 in Encode.xs
3472 Perl_sv_utf8_decode(pTHX_ register SV *sv)
3478 /* The octets may have got themselves encoded - get them back as
3481 if (!sv_utf8_downgrade(sv, TRUE))
3484 /* it is actually just a matter of turning the utf8 flag on, but
3485 * we want to make sure everything inside is valid utf8 first.
3487 c = (U8 *) SvPVX(sv);
3488 if (!is_utf8_string(c, SvCUR(sv)+1))
3490 e = (U8 *) SvEND(sv);
3493 if (!UTF8_IS_INVARIANT(ch)) {
3503 =for apidoc sv_setsv
3505 Copies the contents of the source SV C<ssv> into the destination SV
3506 C<dsv>. The source SV may be destroyed if it is mortal, so don't use this
3507 function if the source SV needs to be reused. Does not handle 'set' magic.
3508 Loosely speaking, it performs a copy-by-value, obliterating any previous
3509 content of the destination.
3511 You probably want to use one of the assortment of wrappers, such as
3512 C<SvSetSV>, C<SvSetSV_nosteal>, C<SvSetMagicSV> and
3513 C<SvSetMagicSV_nosteal>.
3519 /* sv_setsv() is aliased to Perl_sv_setsv_macro; this function provided
3520 for binary compatibility only
3523 Perl_sv_setsv(pTHX_ SV *dstr, register SV *sstr)
3525 sv_setsv_flags(dstr, sstr, SV_GMAGIC);
3529 =for apidoc sv_setsv_flags
3531 Copies the contents of the source SV C<ssv> into the destination SV
3532 C<dsv>. The source SV may be destroyed if it is mortal, so don't use this
3533 function if the source SV needs to be reused. Does not handle 'set' magic.
3534 Loosely speaking, it performs a copy-by-value, obliterating any previous
3535 content of the destination.
3536 If the C<flags> parameter has the C<SV_GMAGIC> bit set, will C<mg_get> on
3537 C<ssv> if appropriate, else not. C<sv_setsv> and C<sv_setsv_nomg> are
3538 implemented in terms of this function.
3540 You probably want to use one of the assortment of wrappers, such as
3541 C<SvSetSV>, C<SvSetSV_nosteal>, C<SvSetMagicSV> and
3542 C<SvSetMagicSV_nosteal>.
3544 This is the primary function for copying scalars, and most other
3545 copy-ish functions and macros use this underneath.
3551 Perl_sv_setsv_flags(pTHX_ SV *dstr, register SV *sstr, I32 flags)
3553 register U32 sflags;
3559 SV_CHECK_THINKFIRST(dstr);
3561 sstr = &PL_sv_undef;
3562 stype = SvTYPE(sstr);
3563 dtype = SvTYPE(dstr);
3567 /* There's a lot of redundancy below but we're going for speed here */
3572 if (dtype != SVt_PVGV) {
3573 (void)SvOK_off(dstr);
3581 sv_upgrade(dstr, SVt_IV);
3584 sv_upgrade(dstr, SVt_PVNV);
3588 sv_upgrade(dstr, SVt_PVIV);
3591 (void)SvIOK_only(dstr);
3592 SvIVX(dstr) = SvIVX(sstr);
3595 if (SvTAINTED(sstr))
3606 sv_upgrade(dstr, SVt_NV);
3611 sv_upgrade(dstr, SVt_PVNV);
3614 SvNVX(dstr) = SvNVX(sstr);
3615 (void)SvNOK_only(dstr);
3616 if (SvTAINTED(sstr))
3624 sv_upgrade(dstr, SVt_RV);
3625 else if (dtype == SVt_PVGV &&
3626 SvTYPE(SvRV(sstr)) == SVt_PVGV) {
3629 if (GvIMPORTED(dstr) != GVf_IMPORTED
3630 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3632 GvIMPORTED_on(dstr);
3643 sv_upgrade(dstr, SVt_PV);
3646 if (dtype < SVt_PVIV)
3647 sv_upgrade(dstr, SVt_PVIV);
3650 if (dtype < SVt_PVNV)
3651 sv_upgrade(dstr, SVt_PVNV);
3658 Perl_croak(aTHX_ "Bizarre copy of %s in %s", sv_reftype(sstr, 0),
3661 Perl_croak(aTHX_ "Bizarre copy of %s", sv_reftype(sstr, 0));
3665 if (dtype <= SVt_PVGV) {
3667 if (dtype != SVt_PVGV) {
3668 char *name = GvNAME(sstr);
3669 STRLEN len = GvNAMELEN(sstr);
3670 sv_upgrade(dstr, SVt_PVGV);
3671 sv_magic(dstr, dstr, PERL_MAGIC_glob, Nullch, 0);
3672 GvSTASH(dstr) = (HV*)SvREFCNT_inc(GvSTASH(sstr));
3673 GvNAME(dstr) = savepvn(name, len);
3674 GvNAMELEN(dstr) = len;
3675 SvFAKE_on(dstr); /* can coerce to non-glob */
3677 /* ahem, death to those who redefine active sort subs */
3678 else if (PL_curstackinfo->si_type == PERLSI_SORT
3679 && GvCV(dstr) && PL_sortcop == CvSTART(GvCV(dstr)))
3680 Perl_croak(aTHX_ "Can't redefine active sort subroutine %s",
3683 #ifdef GV_UNIQUE_CHECK
3684 if (GvUNIQUE((GV*)dstr)) {
3685 Perl_croak(aTHX_ PL_no_modify);
3689 (void)SvOK_off(dstr);
3690 GvINTRO_off(dstr); /* one-shot flag */
3692 GvGP(dstr) = gp_ref(GvGP(sstr));
3693 if (SvTAINTED(sstr))
3695 if (GvIMPORTED(dstr) != GVf_IMPORTED
3696 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3698 GvIMPORTED_on(dstr);
3706 if (SvGMAGICAL(sstr) && (flags & SV_GMAGIC)) {
3708 if (SvTYPE(sstr) != stype) {
3709 stype = SvTYPE(sstr);
3710 if (stype == SVt_PVGV && dtype <= SVt_PVGV)
3714 if (stype == SVt_PVLV)
3715 (void)SvUPGRADE(dstr, SVt_PVNV);
3717 (void)SvUPGRADE(dstr, stype);
3720 sflags = SvFLAGS(sstr);
3722 if (sflags & SVf_ROK) {
3723 if (dtype >= SVt_PV) {
3724 if (dtype == SVt_PVGV) {
3725 SV *sref = SvREFCNT_inc(SvRV(sstr));
3727 int intro = GvINTRO(dstr);
3729 #ifdef GV_UNIQUE_CHECK
3730 if (GvUNIQUE((GV*)dstr)) {
3731 Perl_croak(aTHX_ PL_no_modify);
3736 GvINTRO_off(dstr); /* one-shot flag */
3737 GvLINE(dstr) = CopLINE(PL_curcop);
3738 GvEGV(dstr) = (GV*)dstr;
3741 switch (SvTYPE(sref)) {
3744 SAVESPTR(GvAV(dstr));
3746 dref = (SV*)GvAV(dstr);
3747 GvAV(dstr) = (AV*)sref;
3748 if (!GvIMPORTED_AV(dstr)
3749 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3751 GvIMPORTED_AV_on(dstr);
3756 SAVESPTR(GvHV(dstr));
3758 dref = (SV*)GvHV(dstr);
3759 GvHV(dstr) = (HV*)sref;
3760 if (!GvIMPORTED_HV(dstr)
3761 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3763 GvIMPORTED_HV_on(dstr);
3768 if (GvCVGEN(dstr) && GvCV(dstr) != (CV*)sref) {
3769 SvREFCNT_dec(GvCV(dstr));
3770 GvCV(dstr) = Nullcv;
3771 GvCVGEN(dstr) = 0; /* Switch off cacheness. */
3772 PL_sub_generation++;
3774 SAVESPTR(GvCV(dstr));
3777 dref = (SV*)GvCV(dstr);
3778 if (GvCV(dstr) != (CV*)sref) {
3779 CV* cv = GvCV(dstr);
3781 if (!GvCVGEN((GV*)dstr) &&
3782 (CvROOT(cv) || CvXSUB(cv)))
3784 /* ahem, death to those who redefine
3785 * active sort subs */
3786 if (PL_curstackinfo->si_type == PERLSI_SORT &&
3787 PL_sortcop == CvSTART(cv))
3789 "Can't redefine active sort subroutine %s",
3790 GvENAME((GV*)dstr));
3791 /* Redefining a sub - warning is mandatory if
3792 it was a const and its value changed. */
3793 if (ckWARN(WARN_REDEFINE)
3795 && (!CvCONST((CV*)sref)
3796 || sv_cmp(cv_const_sv(cv),
3797 cv_const_sv((CV*)sref)))))
3799 Perl_warner(aTHX_ packWARN(WARN_REDEFINE),
3801 ? "Constant subroutine %s redefined"
3802 : "Subroutine %s redefined",
3803 GvENAME((GV*)dstr));
3807 cv_ckproto(cv, (GV*)dstr,
3808 SvPOK(sref) ? SvPVX(sref) : Nullch);
3810 GvCV(dstr) = (CV*)sref;
3811 GvCVGEN(dstr) = 0; /* Switch off cacheness. */
3812 GvASSUMECV_on(dstr);
3813 PL_sub_generation++;
3815 if (!GvIMPORTED_CV(dstr)
3816 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3818 GvIMPORTED_CV_on(dstr);
3823 SAVESPTR(GvIOp(dstr));
3825 dref = (SV*)GvIOp(dstr);
3826 GvIOp(dstr) = (IO*)sref;
3830 SAVESPTR(GvFORM(dstr));
3832 dref = (SV*)GvFORM(dstr);
3833 GvFORM(dstr) = (CV*)sref;
3837 SAVESPTR(GvSV(dstr));
3839 dref = (SV*)GvSV(dstr);
3841 if (!GvIMPORTED_SV(dstr)
3842 && CopSTASH_ne(PL_curcop, GvSTASH(dstr)))
3844 GvIMPORTED_SV_on(dstr);
3852 if (SvTAINTED(sstr))
3857 (void)SvOOK_off(dstr); /* backoff */
3859 Safefree(SvPVX(dstr));
3860 SvLEN(dstr)=SvCUR(dstr)=0;
3863 (void)SvOK_off(dstr);
3864 SvRV(dstr) = SvREFCNT_inc(SvRV(sstr));
3866 if (sflags & SVp_NOK) {
3868 /* Only set the public OK flag if the source has public OK. */
3869 if (sflags & SVf_NOK)
3870 SvFLAGS(dstr) |= SVf_NOK;
3871 SvNVX(dstr) = SvNVX(sstr);
3873 if (sflags & SVp_IOK) {
3874 (void)SvIOKp_on(dstr);
3875 if (sflags & SVf_IOK)
3876 SvFLAGS(dstr) |= SVf_IOK;
3877 if (sflags & SVf_IVisUV)
3879 SvIVX(dstr) = SvIVX(sstr);
3881 if (SvAMAGIC(sstr)) {
3885 else if (sflags & SVp_POK) {
3888 * Check to see if we can just swipe the string. If so, it's a
3889 * possible small lose on short strings, but a big win on long ones.
3890 * It might even be a win on short strings if SvPVX(dstr)
3891 * has to be allocated and SvPVX(sstr) has to be freed.
3894 if (SvTEMP(sstr) && /* slated for free anyway? */
3895 SvREFCNT(sstr) == 1 && /* and no other references to it? */
3896 !(sflags & SVf_OOK) && /* and not involved in OOK hack? */
3897 SvLEN(sstr) && /* and really is a string */
3898 /* and won't be needed again, potentially */
3899 !(PL_op && PL_op->op_type == OP_AASSIGN))
3901 if (SvPVX(dstr)) { /* we know that dtype >= SVt_PV */
3903 SvFLAGS(dstr) &= ~SVf_OOK;
3904 Safefree(SvPVX(dstr) - SvIVX(dstr));
3906 else if (SvLEN(dstr))
3907 Safefree(SvPVX(dstr));
3909 (void)SvPOK_only(dstr);
3910 SvPV_set(dstr, SvPVX(sstr));
3911 SvLEN_set(dstr, SvLEN(sstr));
3912 SvCUR_set(dstr, SvCUR(sstr));
3915 (void)SvOK_off(sstr); /* NOTE: nukes most SvFLAGS on sstr */
3916 SvPV_set(sstr, Nullch);
3921 else { /* have to copy actual string */
3922 STRLEN len = SvCUR(sstr);
3923 SvGROW(dstr, len + 1); /* inlined from sv_setpvn */
3924 Move(SvPVX(sstr),SvPVX(dstr),len,char);
3925 SvCUR_set(dstr, len);
3926 *SvEND(dstr) = '\0';
3927 (void)SvPOK_only(dstr);
3929 if (sflags & SVf_UTF8)
3932 if (sflags & SVp_NOK) {
3934 if (sflags & SVf_NOK)
3935 SvFLAGS(dstr) |= SVf_NOK;
3936 SvNVX(dstr) = SvNVX(sstr);
3938 if (sflags & SVp_IOK) {
3939 (void)SvIOKp_on(dstr);
3940 if (sflags & SVf_IOK)
3941 SvFLAGS(dstr) |= SVf_IOK;
3942 if (sflags & SVf_IVisUV)
3944 SvIVX(dstr) = SvIVX(sstr);
3947 else if (sflags & SVp_IOK) {
3948 if (sflags & SVf_IOK)
3949 (void)SvIOK_only(dstr);
3951 (void)SvOK_off(dstr);
3952 (void)SvIOKp_on(dstr);
3954 /* XXXX Do we want to set IsUV for IV(ROK)? Be extra safe... */
3955 if (sflags & SVf_IVisUV)
3957 SvIVX(dstr) = SvIVX(sstr);
3958 if (sflags & SVp_NOK) {
3959 if (sflags & SVf_NOK)
3960 (void)SvNOK_on(dstr);
3962 (void)SvNOKp_on(dstr);
3963 SvNVX(dstr) = SvNVX(sstr);
3966 else if (sflags & SVp_NOK) {
3967 if (sflags & SVf_NOK)
3968 (void)SvNOK_only(dstr);
3970 (void)SvOK_off(dstr);
3973 SvNVX(dstr) = SvNVX(sstr);
3976 if (dtype == SVt_PVGV) {
3977 if (ckWARN(WARN_MISC))
3978 Perl_warner(aTHX_ packWARN(WARN_MISC), "Undefined value assigned to typeglob");
3981 (void)SvOK_off(dstr);
3983 if (SvTAINTED(sstr))
3988 =for apidoc sv_setsv_mg
3990 Like C<sv_setsv>, but also handles 'set' magic.
3996 Perl_sv_setsv_mg(pTHX_ SV *dstr, register SV *sstr)
3998 sv_setsv(dstr,sstr);
4003 =for apidoc sv_setpvn
4005 Copies a string into an SV. The C<len> parameter indicates the number of
4006 bytes to be copied. Does not handle 'set' magic. See C<sv_setpvn_mg>.
4012 Perl_sv_setpvn(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
4014 register char *dptr;
4016 SV_CHECK_THINKFIRST(sv);
4022 /* len is STRLEN which is unsigned, need to copy to signed */
4025 Perl_croak(aTHX_ "panic: sv_setpvn called with negative strlen");
4027 (void)SvUPGRADE(sv, SVt_PV);
4029 SvGROW(sv, len + 1);
4031 Move(ptr,dptr,len,char);
4034 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4039 =for apidoc sv_setpvn_mg
4041 Like C<sv_setpvn>, but also handles 'set' magic.
4047 Perl_sv_setpvn_mg(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
4049 sv_setpvn(sv,ptr,len);
4054 =for apidoc sv_setpv
4056 Copies a string into an SV. The string must be null-terminated. Does not
4057 handle 'set' magic. See C<sv_setpv_mg>.
4063 Perl_sv_setpv(pTHX_ register SV *sv, register const char *ptr)
4065 register STRLEN len;
4067 SV_CHECK_THINKFIRST(sv);
4073 (void)SvUPGRADE(sv, SVt_PV);
4075 SvGROW(sv, len + 1);
4076 Move(ptr,SvPVX(sv),len+1,char);
4078 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4083 =for apidoc sv_setpv_mg
4085 Like C<sv_setpv>, but also handles 'set' magic.
4091 Perl_sv_setpv_mg(pTHX_ register SV *sv, register const char *ptr)
4098 =for apidoc sv_usepvn
4100 Tells an SV to use C<ptr> to find its string value. Normally the string is
4101 stored inside the SV but sv_usepvn allows the SV to use an outside string.
4102 The C<ptr> should point to memory that was allocated by C<malloc>. The
4103 string length, C<len>, must be supplied. This function will realloc the
4104 memory pointed to by C<ptr>, so that pointer should not be freed or used by
4105 the programmer after giving it to sv_usepvn. Does not handle 'set' magic.
4106 See C<sv_usepvn_mg>.
4112 Perl_sv_usepvn(pTHX_ register SV *sv, register char *ptr, register STRLEN len)
4114 SV_CHECK_THINKFIRST(sv);
4115 (void)SvUPGRADE(sv, SVt_PV);
4120 (void)SvOOK_off(sv);
4121 if (SvPVX(sv) && SvLEN(sv))
4122 Safefree(SvPVX(sv));
4123 Renew(ptr, len+1, char);
4126 SvLEN_set(sv, len+1);
4128 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4133 =for apidoc sv_usepvn_mg
4135 Like C<sv_usepvn>, but also handles 'set' magic.
4141 Perl_sv_usepvn_mg(pTHX_ register SV *sv, register char *ptr, register STRLEN len)
4143 sv_usepvn(sv,ptr,len);
4148 =for apidoc sv_force_normal_flags
4150 Undo various types of fakery on an SV: if the PV is a shared string, make
4151 a private copy; if we're a ref, stop refing; if we're a glob, downgrade to
4152 an xpvmg. The C<flags> parameter gets passed to C<sv_unref_flags()>
4153 when unrefing. C<sv_force_normal> calls this function with flags set to 0.
4159 Perl_sv_force_normal_flags(pTHX_ register SV *sv, U32 flags)
4161 if (SvREADONLY(sv)) {
4163 char *pvx = SvPVX(sv);
4164 STRLEN len = SvCUR(sv);
4165 U32 hash = SvUVX(sv);
4166 SvGROW(sv, len + 1);
4167 Move(pvx,SvPVX(sv),len,char);
4171 unsharepvn(pvx, SvUTF8(sv) ? -(I32)len : len, hash);
4173 else if (PL_curcop != &PL_compiling)
4174 Perl_croak(aTHX_ PL_no_modify);
4177 sv_unref_flags(sv, flags);
4178 else if (SvFAKE(sv) && SvTYPE(sv) == SVt_PVGV)
4183 =for apidoc sv_force_normal
4185 Undo various types of fakery on an SV: if the PV is a shared string, make
4186 a private copy; if we're a ref, stop refing; if we're a glob, downgrade to
4187 an xpvmg. See also C<sv_force_normal_flags>.
4193 Perl_sv_force_normal(pTHX_ register SV *sv)
4195 sv_force_normal_flags(sv, 0);
4201 Efficient removal of characters from the beginning of the string buffer.
4202 SvPOK(sv) must be true and the C<ptr> must be a pointer to somewhere inside
4203 the string buffer. The C<ptr> becomes the first character of the adjusted
4204 string. Uses the "OOK hack".
4210 Perl_sv_chop(pTHX_ register SV *sv, register char *ptr)
4212 register STRLEN delta;
4214 if (!ptr || !SvPOKp(sv))
4216 SV_CHECK_THINKFIRST(sv);
4217 if (SvTYPE(sv) < SVt_PVIV)
4218 sv_upgrade(sv,SVt_PVIV);
4221 if (!SvLEN(sv)) { /* make copy of shared string */
4222 char *pvx = SvPVX(sv);
4223 STRLEN len = SvCUR(sv);
4224 SvGROW(sv, len + 1);
4225 Move(pvx,SvPVX(sv),len,char);
4229 SvFLAGS(sv) |= SVf_OOK;
4231 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVp_IOK|SVp_NOK|SVf_IVisUV);
4232 delta = ptr - SvPVX(sv);
4240 =for apidoc sv_catpvn
4242 Concatenates the string onto the end of the string which is in the SV. The
4243 C<len> indicates number of bytes to copy. If the SV has the UTF8
4244 status set, then the bytes appended should be valid UTF8.
4245 Handles 'get' magic, but not 'set' magic. See C<sv_catpvn_mg>.
4250 /* sv_catpvn() is aliased to Perl_sv_catpvn_macro; this function provided
4251 for binary compatibility only
4254 Perl_sv_catpvn(pTHX_ SV *dsv, const char* sstr, STRLEN slen)
4256 sv_catpvn_flags(dsv, sstr, slen, SV_GMAGIC);
4260 =for apidoc sv_catpvn_flags
4262 Concatenates the string onto the end of the string which is in the SV. The
4263 C<len> indicates number of bytes to copy. If the SV has the UTF8
4264 status set, then the bytes appended should be valid UTF8.
4265 If C<flags> has C<SV_GMAGIC> bit set, will C<mg_get> on C<dsv> if
4266 appropriate, else not. C<sv_catpvn> and C<sv_catpvn_nomg> are implemented
4267 in terms of this function.
4273 Perl_sv_catpvn_flags(pTHX_ register SV *dsv, register const char *sstr, register STRLEN slen, I32 flags)
4278 dstr = SvPV_force_flags(dsv, dlen, flags);
4279 SvGROW(dsv, dlen + slen + 1);
4282 Move(sstr, SvPVX(dsv) + dlen, slen, char);
4285 (void)SvPOK_only_UTF8(dsv); /* validate pointer */
4290 =for apidoc sv_catpvn_mg
4292 Like C<sv_catpvn>, but also handles 'set' magic.
4298 Perl_sv_catpvn_mg(pTHX_ register SV *sv, register const char *ptr, register STRLEN len)
4300 sv_catpvn(sv,ptr,len);
4305 =for apidoc sv_catsv
4307 Concatenates the string from SV C<ssv> onto the end of the string in
4308 SV C<dsv>. Modifies C<dsv> but not C<ssv>. Handles 'get' magic, but
4309 not 'set' magic. See C<sv_catsv_mg>.
4313 /* sv_catsv() is aliased to Perl_sv_catsv_macro; this function provided
4314 for binary compatibility only
4317 Perl_sv_catsv(pTHX_ SV *dstr, register SV *sstr)
4319 sv_catsv_flags(dstr, sstr, SV_GMAGIC);
4323 =for apidoc sv_catsv_flags
4325 Concatenates the string from SV C<ssv> onto the end of the string in
4326 SV C<dsv>. Modifies C<dsv> but not C<ssv>. If C<flags> has C<SV_GMAGIC>
4327 bit set, will C<mg_get> on the SVs if appropriate, else not. C<sv_catsv>
4328 and C<sv_catsv_nomg> are implemented in terms of this function.
4333 Perl_sv_catsv_flags(pTHX_ SV *dsv, register SV *ssv, I32 flags)
4339 if ((spv = SvPV(ssv, slen))) {
4340 /* sutf8 and dutf8 were type bool, but under USE_ITHREADS,
4341 gcc version 2.95.2 20000220 (Debian GNU/Linux) for
4342 Linux xxx 2.2.17 on sparc64 with gcc -O2, we erroneously
4343 get dutf8 = 0x20000000, (i.e. SVf_UTF8) even though
4344 dsv->sv_flags doesn't have that bit set.
4345 Andy Dougherty 12 Oct 2001
4347 I32 sutf8 = DO_UTF8(ssv);
4350 if (SvGMAGICAL(dsv) && (flags & SV_GMAGIC))
4352 dutf8 = DO_UTF8(dsv);
4354 if (dutf8 != sutf8) {
4356 /* Not modifying source SV, so taking a temporary copy. */
4357 SV* csv = sv_2mortal(newSVpvn(spv, slen));
4359 sv_utf8_upgrade(csv);
4360 spv = SvPV(csv, slen);
4363 sv_utf8_upgrade_nomg(dsv);
4365 sv_catpvn_nomg(dsv, spv, slen);
4370 =for apidoc sv_catsv_mg
4372 Like C<sv_catsv>, but also handles 'set' magic.
4378 Perl_sv_catsv_mg(pTHX_ SV *dsv, register SV *ssv)
4385 =for apidoc sv_catpv
4387 Concatenates the string onto the end of the string which is in the SV.
4388 If the SV has the UTF8 status set, then the bytes appended should be
4389 valid UTF8. Handles 'get' magic, but not 'set' magic. See C<sv_catpv_mg>.
4394 Perl_sv_catpv(pTHX_ register SV *sv, register const char *ptr)
4396 register STRLEN len;
4402 junk = SvPV_force(sv, tlen);
4404 SvGROW(sv, tlen + len + 1);
4407 Move(ptr,SvPVX(sv)+tlen,len+1,char);
4409 (void)SvPOK_only_UTF8(sv); /* validate pointer */
4414 =for apidoc sv_catpv_mg
4416 Like C<sv_catpv>, but also handles 'set' magic.
4422 Perl_sv_catpv_mg(pTHX_ register SV *sv, register const char *ptr)
4431 Create a new null SV, or if len > 0, create a new empty SVt_PV type SV
4432 with an initial PV allocation of len+1. Normally accessed via the C<NEWSV>
4439 Perl_newSV(pTHX_ STRLEN len)
4445 sv_upgrade(sv, SVt_PV);
4446 SvGROW(sv, len + 1);
4451 =for apidoc sv_magicext
4453 Adds magic to an SV, upgrading it if necessary. Applies the
4454 supplied vtable and returns pointer to the magic added.
4456 Note that sv_magicext will allow things that sv_magic will not.
4457 In particular you can add magic to SvREADONLY SVs and and more than
4458 one instance of the same 'how'
4460 I C<namelen> is greater then zero then a savepvn() I<copy> of C<name> is stored,
4461 if C<namelen> is zero then C<name> is stored as-is and - as another special
4462 case - if C<(name && namelen == HEf_SVKEY)> then C<name> is assumed to contain
4463 an C<SV*> and has its REFCNT incremented
4465 (This is now used as a subroutine by sv_magic.)
4470 Perl_sv_magicext(pTHX_ SV* sv, SV* obj, int how, MGVTBL *vtable,
4471 const char* name, I32 namlen)
4475 if (SvTYPE(sv) < SVt_PVMG) {
4476 (void)SvUPGRADE(sv, SVt_PVMG);
4478 Newz(702,mg, 1, MAGIC);
4479 mg->mg_moremagic = SvMAGIC(sv);
4482 /* Some magic sontains a reference loop, where the sv and object refer to
4483 each other. To prevent a reference loop that would prevent such
4484 objects being freed, we look for such loops and if we find one we
4485 avoid incrementing the object refcount. */
4486 if (!obj || obj == sv ||
4487 how == PERL_MAGIC_arylen ||
4488 how == PERL_MAGIC_qr ||
4489 (SvTYPE(obj) == SVt_PVGV &&
4490 (GvSV(obj) == sv || GvHV(obj) == (HV*)sv || GvAV(obj) == (AV*)sv ||
4491 GvCV(obj) == (CV*)sv || GvIOp(obj) == (IO*)sv ||
4492 GvFORM(obj) == (CV*)sv)))
4497 mg->mg_obj = SvREFCNT_inc(obj);
4498 mg->mg_flags |= MGf_REFCOUNTED;
4501 mg->mg_len = namlen;
4504 mg->mg_ptr = savepvn(name, namlen);
4505 else if (namlen == HEf_SVKEY)
4506 mg->mg_ptr = (char*)SvREFCNT_inc((SV*)name);
4508 mg->mg_ptr = (char *) name;
4510 mg->mg_virtual = vtable;
4514 SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
4519 =for apidoc sv_magic
4521 Adds magic to an SV. First upgrades C<sv> to type C<SVt_PVMG> if necessary,
4522 then adds a new magic item of type C<how> to the head of the magic list.
4528 Perl_sv_magic(pTHX_ register SV *sv, SV *obj, int how, const char *name, I32 namlen)
4533 if (SvREADONLY(sv)) {
4534 if (PL_curcop != &PL_compiling
4535 && how != PERL_MAGIC_regex_global
4536 && how != PERL_MAGIC_bm
4537 && how != PERL_MAGIC_fm
4538 && how != PERL_MAGIC_sv
4541 Perl_croak(aTHX_ PL_no_modify);
4544 if (SvMAGICAL(sv) || (how == PERL_MAGIC_taint && SvTYPE(sv) >= SVt_PVMG)) {
4545 if (SvMAGIC(sv) && (mg = mg_find(sv, how))) {
4546 /* sv_magic() refuses to add a magic of the same 'how' as an
4549 if (how == PERL_MAGIC_taint)
4557 vtable = &PL_vtbl_sv;
4559 case PERL_MAGIC_overload:
4560 vtable = &PL_vtbl_amagic;
4562 case PERL_MAGIC_overload_elem:
4563 vtable = &PL_vtbl_amagicelem;
4565 case PERL_MAGIC_overload_table:
4566 vtable = &PL_vtbl_ovrld;
4569 vtable = &PL_vtbl_bm;
4571 case PERL_MAGIC_regdata:
4572 vtable = &PL_vtbl_regdata;
4574 case PERL_MAGIC_regdatum:
4575 vtable = &PL_vtbl_regdatum;
4577 case PERL_MAGIC_env:
4578 vtable = &PL_vtbl_env;
4581 vtable = &PL_vtbl_fm;
4583 case PERL_MAGIC_envelem:
4584 vtable = &PL_vtbl_envelem;
4586 case PERL_MAGIC_regex_global:
4587 vtable = &PL_vtbl_mglob;
4589 case PERL_MAGIC_isa:
4590 vtable = &PL_vtbl_isa;
4592 case PERL_MAGIC_isaelem:
4593 vtable = &PL_vtbl_isaelem;
4595 case PERL_MAGIC_nkeys:
4596 vtable = &PL_vtbl_nkeys;
4598 case PERL_MAGIC_dbfile:
4601 case PERL_MAGIC_dbline:
4602 vtable = &PL_vtbl_dbline;
4604 #ifdef USE_5005THREADS
4605 case PERL_MAGIC_mutex:
4606 vtable = &PL_vtbl_mutex;
4608 #endif /* USE_5005THREADS */
4609 #ifdef USE_LOCALE_COLLATE
4610 case PERL_MAGIC_collxfrm:
4611 vtable = &PL_vtbl_collxfrm;
4613 #endif /* USE_LOCALE_COLLATE */
4614 case PERL_MAGIC_tied:
4615 vtable = &PL_vtbl_pack;
4617 case PERL_MAGIC_tiedelem:
4618 case PERL_MAGIC_tiedscalar:
4619 vtable = &PL_vtbl_packelem;
4622 vtable = &PL_vtbl_regexp;
4624 case PERL_MAGIC_sig:
4625 vtable = &PL_vtbl_sig;
4627 case PERL_MAGIC_sigelem:
4628 vtable = &PL_vtbl_sigelem;
4630 case PERL_MAGIC_taint:
4631 vtable = &PL_vtbl_taint;
4633 case PERL_MAGIC_uvar:
4634 vtable = &PL_vtbl_uvar;
4636 case PERL_MAGIC_vec:
4637 vtable = &PL_vtbl_vec;
4639 case PERL_MAGIC_substr:
4640 vtable = &PL_vtbl_substr;
4642 case PERL_MAGIC_defelem:
4643 vtable = &PL_vtbl_defelem;
4645 case PERL_MAGIC_glob:
4646 vtable = &PL_vtbl_glob;
4648 case PERL_MAGIC_arylen:
4649 vtable = &PL_vtbl_arylen;
4651 case PERL_MAGIC_pos:
4652 vtable = &PL_vtbl_pos;
4654 case PERL_MAGIC_backref:
4655 vtable = &PL_vtbl_backref;
4657 case PERL_MAGIC_ext:
4658 /* Reserved for use by extensions not perl internals. */
4659 /* Useful for attaching extension internal data to perl vars. */
4660 /* Note that multiple extensions may clash if magical scalars */
4661 /* etc holding private data from one are passed to another. */
4664 Perl_croak(aTHX_ "Don't know how to handle magic of type \\%o", how);
4667 /* Rest of work is done else where */
4668 mg = sv_magicext(sv,obj,how,vtable,name,namlen);
4671 case PERL_MAGIC_taint:
4674 case PERL_MAGIC_ext:
4675 case PERL_MAGIC_dbfile:
4682 =for apidoc sv_unmagic
4684 Removes all magic of type C<type> from an SV.
4690 Perl_sv_unmagic(pTHX_ SV *sv, int type)
4694 if (SvTYPE(sv) < SVt_PVMG || !SvMAGIC(sv))
4697 for (mg = *mgp; mg; mg = *mgp) {
4698 if (mg->mg_type == type) {
4699 MGVTBL* vtbl = mg->mg_virtual;
4700 *mgp = mg->mg_moremagic;
4701 if (vtbl && vtbl->svt_free)
4702 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
4703 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
4705 Safefree(mg->mg_ptr);
4706 else if (mg->mg_len == HEf_SVKEY)
4707 SvREFCNT_dec((SV*)mg->mg_ptr);
4709 if (mg->mg_flags & MGf_REFCOUNTED)
4710 SvREFCNT_dec(mg->mg_obj);
4714 mgp = &mg->mg_moremagic;
4718 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_NOK|SVp_POK)) >> PRIVSHIFT;
4725 =for apidoc sv_rvweaken
4727 Weaken a reference: set the C<SvWEAKREF> flag on this RV; give the
4728 referred-to SV C<PERL_MAGIC_backref> magic if it hasn't already; and
4729 push a back-reference to this RV onto the array of backreferences
4730 associated with that magic.
4736 Perl_sv_rvweaken(pTHX_ SV *sv)
4739 if (!SvOK(sv)) /* let undefs pass */
4742 Perl_croak(aTHX_ "Can't weaken a nonreference");
4743 else if (SvWEAKREF(sv)) {
4744 if (ckWARN(WARN_MISC))
4745 Perl_warner(aTHX_ packWARN(WARN_MISC), "Reference is already weak");
4749 sv_add_backref(tsv, sv);
4755 /* Give tsv backref magic if it hasn't already got it, then push a
4756 * back-reference to sv onto the array associated with the backref magic.
4760 S_sv_add_backref(pTHX_ SV *tsv, SV *sv)
4764 if (SvMAGICAL(tsv) && (mg = mg_find(tsv, PERL_MAGIC_backref)))
4765 av = (AV*)mg->mg_obj;
4768 sv_magic(tsv, (SV*)av, PERL_MAGIC_backref, NULL, 0);
4769 SvREFCNT_dec(av); /* for sv_magic */
4774 /* delete a back-reference to ourselves from the backref magic associated
4775 * with the SV we point to.
4779 S_sv_del_backref(pTHX_ SV *sv)
4786 if (!SvMAGICAL(tsv) || !(mg = mg_find(tsv, PERL_MAGIC_backref)))
4787 Perl_croak(aTHX_ "panic: del_backref");
4788 av = (AV *)mg->mg_obj;
4793 svp[i] = &PL_sv_undef; /* XXX */
4800 =for apidoc sv_insert
4802 Inserts a string at the specified offset/length within the SV. Similar to
4803 the Perl substr() function.
4809 Perl_sv_insert(pTHX_ SV *bigstr, STRLEN offset, STRLEN len, char *little, STRLEN littlelen)
4813 register char *midend;
4814 register char *bigend;
4820 Perl_croak(aTHX_ "Can't modify non-existent substring");
4821 SvPV_force(bigstr, curlen);
4822 (void)SvPOK_only_UTF8(bigstr);
4823 if (offset + len > curlen) {
4824 SvGROW(bigstr, offset+len+1);
4825 Zero(SvPVX(bigstr)+curlen, offset+len-curlen, char);
4826 SvCUR_set(bigstr, offset+len);
4830 i = littlelen - len;
4831 if (i > 0) { /* string might grow */
4832 big = SvGROW(bigstr, SvCUR(bigstr) + i + 1);
4833 mid = big + offset + len;
4834 midend = bigend = big + SvCUR(bigstr);
4837 while (midend > mid) /* shove everything down */
4838 *--bigend = *--midend;
4839 Move(little,big+offset,littlelen,char);
4845 Move(little,SvPVX(bigstr)+offset,len,char);
4850 big = SvPVX(bigstr);
4853 bigend = big + SvCUR(bigstr);
4855 if (midend > bigend)
4856 Perl_croak(aTHX_ "panic: sv_insert");
4858 if (mid - big > bigend - midend) { /* faster to shorten from end */
4860 Move(little, mid, littlelen,char);
4863 i = bigend - midend;
4865 Move(midend, mid, i,char);
4869 SvCUR_set(bigstr, mid - big);
4872 else if ((i = mid - big)) { /* faster from front */
4873 midend -= littlelen;
4875 sv_chop(bigstr,midend-i);
4880 Move(little, mid, littlelen,char);
4882 else if (littlelen) {
4883 midend -= littlelen;
4884 sv_chop(bigstr,midend);
4885 Move(little,midend,littlelen,char);
4888 sv_chop(bigstr,midend);
4894 =for apidoc sv_replace
4896 Make the first argument a copy of the second, then delete the original.
4897 The target SV physically takes over ownership of the body of the source SV
4898 and inherits its flags; however, the target keeps any magic it owns,
4899 and any magic in the source is discarded.
4900 Note that this is a rather specialist SV copying operation; most of the
4901 time you'll want to use C<sv_setsv> or one of its many macro front-ends.
4907 Perl_sv_replace(pTHX_ register SV *sv, register SV *nsv)
4909 U32 refcnt = SvREFCNT(sv);
4910 SV_CHECK_THINKFIRST(sv);
4911 if (SvREFCNT(nsv) != 1 && ckWARN_d(WARN_INTERNAL))
4912 Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Reference miscount in sv_replace()");
4913 if (SvMAGICAL(sv)) {
4917 sv_upgrade(nsv, SVt_PVMG);
4918 SvMAGIC(nsv) = SvMAGIC(sv);
4919 SvFLAGS(nsv) |= SvMAGICAL(sv);
4925 assert(!SvREFCNT(sv));
4926 StructCopy(nsv,sv,SV);
4927 SvREFCNT(sv) = refcnt;
4928 SvFLAGS(nsv) |= SVTYPEMASK; /* Mark as freed */
4933 =for apidoc sv_clear
4935 Clear an SV: call any destructors, free up any memory used by the body,
4936 and free the body itself. The SV's head is I<not> freed, although
4937 its type is set to all 1's so that it won't inadvertently be assumed
4938 to be live during global destruction etc.
4939 This function should only be called when REFCNT is zero. Most of the time
4940 you'll want to call C<sv_free()> (or its macro wrapper C<SvREFCNT_dec>)
4947 Perl_sv_clear(pTHX_ register SV *sv)
4951 assert(SvREFCNT(sv) == 0);
4954 if (PL_defstash) { /* Still have a symbol table? */
4959 Zero(&tmpref, 1, SV);
4960 sv_upgrade(&tmpref, SVt_RV);
4962 SvREADONLY_on(&tmpref); /* DESTROY() could be naughty */
4963 SvREFCNT(&tmpref) = 1;
4966 stash = SvSTASH(sv);
4967 destructor = StashHANDLER(stash,DESTROY);
4970 PUSHSTACKi(PERLSI_DESTROY);
4971 SvRV(&tmpref) = SvREFCNT_inc(sv);
4976 call_sv((SV*)destructor, G_DISCARD|G_EVAL|G_KEEPERR);
4982 } while (SvOBJECT(sv) && SvSTASH(sv) != stash);
4984 del_XRV(SvANY(&tmpref));
4987 if (PL_in_clean_objs)
4988 Perl_croak(aTHX_ "DESTROY created new reference to dead object '%s'",
4990 /* DESTROY gave object new lease on life */
4996 SvREFCNT_dec(SvSTASH(sv)); /* possibly of changed persuasion */
4997 SvOBJECT_off(sv); /* Curse the object. */
4998 if (SvTYPE(sv) != SVt_PVIO)
4999 --PL_sv_objcount; /* XXX Might want something more general */
5002 if (SvTYPE(sv) >= SVt_PVMG) {
5005 if (SvFLAGS(sv) & SVpad_TYPED)
5006 SvREFCNT_dec(SvSTASH(sv));
5009 switch (SvTYPE(sv)) {
5012 IoIFP(sv) != PerlIO_stdin() &&
5013 IoIFP(sv) != PerlIO_stdout() &&
5014 IoIFP(sv) != PerlIO_stderr())
5016 io_close((IO*)sv, FALSE);
5018 if (IoDIRP(sv) && !(IoFLAGS(sv) & IOf_FAKE_DIRP))
5019 PerlDir_close(IoDIRP(sv));
5020 IoDIRP(sv) = (DIR*)NULL;
5021 Safefree(IoTOP_NAME(sv));
5022 Safefree(IoFMT_NAME(sv));
5023 Safefree(IoBOTTOM_NAME(sv));
5038 SvREFCNT_dec(LvTARG(sv));
5042 Safefree(GvNAME(sv));
5043 /* cannot decrease stash refcount yet, as we might recursively delete
5044 ourselves when the refcnt drops to zero. Delay SvREFCNT_dec
5045 of stash until current sv is completely gone.
5046 -- JohnPC, 27 Mar 1998 */
5047 stash = GvSTASH(sv);
5053 (void)SvOOK_off(sv);
5061 SvREFCNT_dec(SvRV(sv));
5063 else if (SvPVX(sv) && SvLEN(sv))
5064 Safefree(SvPVX(sv));
5065 else if (SvPVX(sv) && SvREADONLY(sv) && SvFAKE(sv)) {
5066 unsharepvn(SvPVX(sv),
5067 SvUTF8(sv) ? -(I32)SvCUR(sv) : SvCUR(sv),
5080 switch (SvTYPE(sv)) {
5096 del_XPVIV(SvANY(sv));
5099 del_XPVNV(SvANY(sv));
5102 del_XPVMG(SvANY(sv));
5105 del_XPVLV(SvANY(sv));
5108 del_XPVAV(SvANY(sv));
5111 del_XPVHV(SvANY(sv));
5114 del_XPVCV(SvANY(sv));
5117 del_XPVGV(SvANY(sv));
5118 /* code duplication for increased performance. */
5119 SvFLAGS(sv) &= SVf_BREAK;
5120 SvFLAGS(sv) |= SVTYPEMASK;
5121 /* decrease refcount of the stash that owns this GV, if any */
5123 SvREFCNT_dec(stash);
5124 return; /* not break, SvFLAGS reset already happened */
5126 del_XPVBM(SvANY(sv));
5129 del_XPVFM(SvANY(sv));
5132 del_XPVIO(SvANY(sv));
5135 SvFLAGS(sv) &= SVf_BREAK;
5136 SvFLAGS(sv) |= SVTYPEMASK;
5140 =for apidoc sv_newref
5142 Increment an SV's reference count. Use the C<SvREFCNT_inc()> wrapper
5149 Perl_sv_newref(pTHX_ SV *sv)
5152 ATOMIC_INC(SvREFCNT(sv));
5159 Decrement an SV's reference count, and if it drops to zero, call
5160 C<sv_clear> to invoke destructors and free up any memory used by
5161 the body; finally, deallocate the SV's head itself.
5162 Normally called via a wrapper macro C<SvREFCNT_dec>.
5168 Perl_sv_free(pTHX_ SV *sv)
5170 int refcount_is_zero;
5174 if (SvREFCNT(sv) == 0) {
5175 if (SvFLAGS(sv) & SVf_BREAK)
5176 /* this SV's refcnt has been artificially decremented to
5177 * trigger cleanup */
5179 if (PL_in_clean_all) /* All is fair */
5181 if (SvREADONLY(sv) && SvIMMORTAL(sv)) {
5182 /* make sure SvREFCNT(sv)==0 happens very seldom */
5183 SvREFCNT(sv) = (~(U32)0)/2;
5186 if (ckWARN_d(WARN_INTERNAL))
5187 Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Attempt to free unreferenced scalar");
5190 ATOMIC_DEC_AND_TEST(refcount_is_zero, SvREFCNT(sv));
5191 if (!refcount_is_zero)
5195 if (ckWARN_d(WARN_DEBUGGING))
5196 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
5197 "Attempt to free temp prematurely: SV 0x%"UVxf,
5202 if (SvREADONLY(sv) && SvIMMORTAL(sv)) {
5203 /* make sure SvREFCNT(sv)==0 happens very seldom */
5204 SvREFCNT(sv) = (~(U32)0)/2;
5215 Returns the length of the string in the SV. Handles magic and type
5216 coercion. See also C<SvCUR>, which gives raw access to the xpv_cur slot.
5222 Perl_sv_len(pTHX_ register SV *sv)
5230 len = mg_length(sv);
5232 (void)SvPV(sv, len);
5237 =for apidoc sv_len_utf8
5239 Returns the number of characters in the string in an SV, counting wide
5240 UTF8 bytes as a single character. Handles magic and type coercion.
5246 Perl_sv_len_utf8(pTHX_ register SV *sv)
5252 return mg_length(sv);
5256 U8 *s = (U8*)SvPV(sv, len);
5258 return Perl_utf8_length(aTHX_ s, s + len);
5263 =for apidoc sv_pos_u2b
5265 Converts the value pointed to by offsetp from a count of UTF8 chars from
5266 the start of the string, to a count of the equivalent number of bytes; if
5267 lenp is non-zero, it does the same to lenp, but this time starting from
5268 the offset, rather than from the start of the string. Handles magic and
5275 Perl_sv_pos_u2b(pTHX_ register SV *sv, I32* offsetp, I32* lenp)
5280 I32 uoffset = *offsetp;
5286 start = s = (U8*)SvPV(sv, len);
5288 while (s < send && uoffset--)
5292 *offsetp = s - start;
5296 while (s < send && ulen--)
5306 =for apidoc sv_pos_b2u
5308 Converts the value pointed to by offsetp from a count of bytes from the
5309 start of the string, to a count of the equivalent number of UTF8 chars.
5310 Handles magic and type coercion.
5316 Perl_sv_pos_b2u(pTHX_ register SV *sv, I32* offsetp)
5325 s = (U8*)SvPV(sv, len);
5327 Perl_croak(aTHX_ "panic: sv_pos_b2u: bad byte offset");
5328 send = s + *offsetp;
5332 /* Call utf8n_to_uvchr() to validate the sequence */
5333 utf8n_to_uvchr(s, UTF8SKIP(s), &n, 0);
5348 Returns a boolean indicating whether the strings in the two SVs are
5349 identical. Is UTF-8 and 'use bytes' aware, handles get magic, and will
5350 coerce its args to strings if necessary.
5356 Perl_sv_eq(pTHX_ register SV *sv1, register SV *sv2)
5364 SV* svrecode = Nullsv;
5371 pv1 = SvPV(sv1, cur1);
5378 pv2 = SvPV(sv2, cur2);
5380 if (cur1 && cur2 && SvUTF8(sv1) != SvUTF8(sv2) && !IN_BYTES) {
5381 /* Differing utf8ness.
5382 * Do not UTF8size the comparands as a side-effect. */
5385 svrecode = newSVpvn(pv2, cur2);
5386 sv_recode_to_utf8(svrecode, PL_encoding);
5387 pv2 = SvPV(svrecode, cur2);
5390 svrecode = newSVpvn(pv1, cur1);
5391 sv_recode_to_utf8(svrecode, PL_encoding);
5392 pv1 = SvPV(svrecode, cur1);
5394 /* Now both are in UTF-8. */
5399 bool is_utf8 = TRUE;
5402 /* sv1 is the UTF-8 one,
5403 * if is equal it must be downgrade-able */
5404 char *pv = (char*)bytes_from_utf8((U8*)pv1,
5410 /* sv2 is the UTF-8 one,
5411 * if is equal it must be downgrade-able */
5412 char *pv = (char *)bytes_from_utf8((U8*)pv2,
5418 /* Downgrade not possible - cannot be eq */
5425 eq = memEQ(pv1, pv2, cur1);
5428 SvREFCNT_dec(svrecode);
5439 Compares the strings in two SVs. Returns -1, 0, or 1 indicating whether the
5440 string in C<sv1> is less than, equal to, or greater than the string in
5441 C<sv2>. Is UTF-8 and 'use bytes' aware, handles get magic, and will
5442 coerce its args to strings if necessary. See also C<sv_cmp_locale>.
5448 Perl_sv_cmp(pTHX_ register SV *sv1, register SV *sv2)
5451 char *pv1, *pv2, *tpv = Nullch;
5453 SV *svrecode = Nullsv;
5460 pv1 = SvPV(sv1, cur1);
5467 pv2 = SvPV(sv2, cur2);
5469 if (cur1 && cur2 && SvUTF8(sv1) != SvUTF8(sv2) && !IN_BYTES) {
5470 /* Differing utf8ness.
5471 * Do not UTF8size the comparands as a side-effect. */
5474 svrecode = newSVpvn(pv2, cur2);
5475 sv_recode_to_utf8(svrecode, PL_encoding);
5476 pv2 = SvPV(svrecode, cur2);
5479 pv2 = tpv = (char*)bytes_to_utf8((U8*)pv2, &cur2);
5484 svrecode = newSVpvn(pv1, cur1);
5485 sv_recode_to_utf8(svrecode, PL_encoding);
5486 pv1 = SvPV(svrecode, cur1);
5489 pv1 = tpv = (char*)bytes_to_utf8((U8*)pv1, &cur1);
5495 cmp = cur2 ? -1 : 0;
5499 I32 retval = memcmp((void*)pv1, (void*)pv2, cur1 < cur2 ? cur1 : cur2);
5502 cmp = retval < 0 ? -1 : 1;
5503 } else if (cur1 == cur2) {
5506 cmp = cur1 < cur2 ? -1 : 1;
5511 SvREFCNT_dec(svrecode);
5520 =for apidoc sv_cmp_locale
5522 Compares the strings in two SVs in a locale-aware manner. Is UTF-8 and
5523 'use bytes' aware, handles get magic, and will coerce its args to strings
5524 if necessary. See also C<sv_cmp_locale>. See also C<sv_cmp>.
5530 Perl_sv_cmp_locale(pTHX_ register SV *sv1, register SV *sv2)
5532 #ifdef USE_LOCALE_COLLATE
5538 if (PL_collation_standard)
5542 pv1 = sv1 ? sv_collxfrm(sv1, &len1) : (char *) NULL;
5544 pv2 = sv2 ? sv_collxfrm(sv2, &len2) : (char *) NULL;
5546 if (!pv1 || !len1) {
5557 retval = memcmp((void*)pv1, (void*)pv2, len1 < len2 ? len1 : len2);
5560 return retval < 0 ? -1 : 1;
5563 * When the result of collation is equality, that doesn't mean
5564 * that there are no differences -- some locales exclude some
5565 * characters from consideration. So to avoid false equalities,
5566 * we use the raw string as a tiebreaker.
5572 #endif /* USE_LOCALE_COLLATE */
5574 return sv_cmp(sv1, sv2);
5578 #ifdef USE_LOCALE_COLLATE
5581 =for apidoc sv_collxfrm
5583 Add Collate Transform magic to an SV if it doesn't already have it.
5585 Any scalar variable may carry PERL_MAGIC_collxfrm magic that contains the
5586 scalar data of the variable, but transformed to such a format that a normal
5587 memory comparison can be used to compare the data according to the locale
5594 Perl_sv_collxfrm(pTHX_ SV *sv, STRLEN *nxp)
5598 mg = SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_collxfrm) : (MAGIC *) NULL;
5599 if (!mg || !mg->mg_ptr || *(U32*)mg->mg_ptr != PL_collation_ix) {
5604 Safefree(mg->mg_ptr);
5606 if ((xf = mem_collxfrm(s, len, &xlen))) {
5607 if (SvREADONLY(sv)) {
5610 return xf + sizeof(PL_collation_ix);
5613 sv_magic(sv, 0, PERL_MAGIC_collxfrm, 0, 0);
5614 mg = mg_find(sv, PERL_MAGIC_collxfrm);
5627 if (mg && mg->mg_ptr) {
5629 return mg->mg_ptr + sizeof(PL_collation_ix);
5637 #endif /* USE_LOCALE_COLLATE */
5642 Get a line from the filehandle and store it into the SV, optionally
5643 appending to the currently-stored string.
5649 Perl_sv_gets(pTHX_ register SV *sv, register PerlIO *fp, I32 append)
5653 register STDCHAR rslast;
5654 register STDCHAR *bp;
5659 SV_CHECK_THINKFIRST(sv);
5660 (void)SvUPGRADE(sv, SVt_PV);
5664 if (PL_curcop == &PL_compiling) {
5665 /* we always read code in line mode */
5669 else if (RsSNARF(PL_rs)) {
5673 else if (RsRECORD(PL_rs)) {
5674 I32 recsize, bytesread;
5677 /* Grab the size of the record we're getting */
5678 recsize = SvIV(SvRV(PL_rs));
5679 (void)SvPOK_only(sv); /* Validate pointer */
5680 buffer = SvGROW(sv, recsize + 1);
5683 /* VMS wants read instead of fread, because fread doesn't respect */
5684 /* RMS record boundaries. This is not necessarily a good thing to be */
5685 /* doing, but we've got no other real choice */
5686 bytesread = PerlLIO_read(PerlIO_fileno(fp), buffer, recsize);
5688 bytesread = PerlIO_read(fp, buffer, recsize);
5690 SvCUR_set(sv, bytesread);
5691 buffer[bytesread] = '\0';
5692 if (PerlIO_isutf8(fp))
5696 return(SvCUR(sv) ? SvPVX(sv) : Nullch);
5698 else if (RsPARA(PL_rs)) {
5704 /* Get $/ i.e. PL_rs into same encoding as stream wants */
5705 if (PerlIO_isutf8(fp)) {
5706 rsptr = SvPVutf8(PL_rs, rslen);
5709 if (SvUTF8(PL_rs)) {
5710 if (!sv_utf8_downgrade(PL_rs, TRUE)) {
5711 Perl_croak(aTHX_ "Wide character in $/");
5714 rsptr = SvPV(PL_rs, rslen);
5718 rslast = rslen ? rsptr[rslen - 1] : '\0';
5720 if (rspara) { /* have to do this both before and after */
5721 do { /* to make sure file boundaries work right */
5724 i = PerlIO_getc(fp);
5728 PerlIO_ungetc(fp,i);
5734 /* See if we know enough about I/O mechanism to cheat it ! */
5736 /* This used to be #ifdef test - it is made run-time test for ease
5737 of abstracting out stdio interface. One call should be cheap
5738 enough here - and may even be a macro allowing compile
5742 if (PerlIO_fast_gets(fp)) {
5745 * We're going to steal some values from the stdio struct
5746 * and put EVERYTHING in the innermost loop into registers.
5748 register STDCHAR *ptr;
5752 #if defined(VMS) && defined(PERLIO_IS_STDIO)
5753 /* An ungetc()d char is handled separately from the regular
5754 * buffer, so we getc() it back out and stuff it in the buffer.
5756 i = PerlIO_getc(fp);
5757 if (i == EOF) return 0;
5758 *(--((*fp)->_ptr)) = (unsigned char) i;
5762 /* Here is some breathtakingly efficient cheating */
5764 cnt = PerlIO_get_cnt(fp); /* get count into register */
5765 (void)SvPOK_only(sv); /* validate pointer */
5766 if (SvLEN(sv) - append <= cnt + 1) { /* make sure we have the room */
5767 if (cnt > 80 && SvLEN(sv) > append) {
5768 shortbuffered = cnt - SvLEN(sv) + append + 1;
5769 cnt -= shortbuffered;
5773 /* remember that cnt can be negative */
5774 SvGROW(sv, append + (cnt <= 0 ? 2 : (cnt + 1)));
5779 bp = (STDCHAR*)SvPVX(sv) + append; /* move these two too to registers */
5780 ptr = (STDCHAR*)PerlIO_get_ptr(fp);
5781 DEBUG_P(PerlIO_printf(Perl_debug_log,
5782 "Screamer: entering, ptr=%"UVuf", cnt=%ld\n",PTR2UV(ptr),(long)cnt));
5783 DEBUG_P(PerlIO_printf(Perl_debug_log,
5784 "Screamer: entering: PerlIO * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
5785 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
5786 PTR2UV(PerlIO_has_base(fp) ? PerlIO_get_base(fp) : 0)));
5791 while (cnt > 0) { /* this | eat */
5793 if ((*bp++ = *ptr++) == rslast) /* really | dust */
5794 goto thats_all_folks; /* screams | sed :-) */
5798 Copy(ptr, bp, cnt, char); /* this | eat */
5799 bp += cnt; /* screams | dust */
5800 ptr += cnt; /* louder | sed :-) */
5805 if (shortbuffered) { /* oh well, must extend */
5806 cnt = shortbuffered;
5808 bpx = bp - (STDCHAR*)SvPVX(sv); /* box up before relocation */
5810 SvGROW(sv, SvLEN(sv) + append + cnt + 2);
5811 bp = (STDCHAR*)SvPVX(sv) + bpx; /* unbox after relocation */
5815 DEBUG_P(PerlIO_printf(Perl_debug_log,
5816 "Screamer: going to getc, ptr=%"UVuf", cnt=%ld\n",
5817 PTR2UV(ptr),(long)cnt));
5818 PerlIO_set_ptrcnt(fp, (STDCHAR*)ptr, cnt); /* deregisterize cnt and ptr */
5820 DEBUG_P(PerlIO_printf(Perl_debug_log,
5821 "Screamer: pre: FILE * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
5822 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
5823 PTR2UV(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0)));
5825 /* This used to call 'filbuf' in stdio form, but as that behaves like
5826 getc when cnt <= 0 we use PerlIO_getc here to avoid introducing
5827 another abstraction. */
5828 i = PerlIO_getc(fp); /* get more characters */
5830 DEBUG_P(PerlIO_printf(Perl_debug_log,
5831 "Screamer: post: FILE * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
5832 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
5833 PTR2UV(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0)));
5835 cnt = PerlIO_get_cnt(fp);
5836 ptr = (STDCHAR*)PerlIO_get_ptr(fp); /* reregisterize cnt and ptr */
5837 DEBUG_P(PerlIO_printf(Perl_debug_log,
5838 "Screamer: after getc, ptr=%"UVuf", cnt=%ld\n",PTR2UV(ptr),(long)cnt));
5840 if (i == EOF) /* all done for ever? */
5841 goto thats_really_all_folks;
5843 bpx = bp - (STDCHAR*)SvPVX(sv); /* box up before relocation */
5845 SvGROW(sv, bpx + cnt + 2);
5846 bp = (STDCHAR*)SvPVX(sv) + bpx; /* unbox after relocation */
5848 *bp++ = i; /* store character from PerlIO_getc */
5850 if (rslen && (STDCHAR)i == rslast) /* all done for now? */
5851 goto thats_all_folks;
5855 if ((rslen > 1 && (bp - (STDCHAR*)SvPVX(sv) < rslen)) ||
5856 memNE((char*)bp - rslen, rsptr, rslen))
5857 goto screamer; /* go back to the fray */
5858 thats_really_all_folks:
5860 cnt += shortbuffered;
5861 DEBUG_P(PerlIO_printf(Perl_debug_log,
5862 "Screamer: quitting, ptr=%"UVuf", cnt=%ld\n",PTR2UV(ptr),(long)cnt));
5863 PerlIO_set_ptrcnt(fp, (STDCHAR*)ptr, cnt); /* put these back or we're in trouble */
5864 DEBUG_P(PerlIO_printf(Perl_debug_log,
5865 "Screamer: end: FILE * thinks ptr=%"UVuf", cnt=%ld, base=%"UVuf"\n",
5866 PTR2UV(PerlIO_get_ptr(fp)), (long)PerlIO_get_cnt(fp),
5867 PTR2UV(PerlIO_has_base (fp) ? PerlIO_get_base(fp) : 0)));
5869 SvCUR_set(sv, bp - (STDCHAR*)SvPVX(sv)); /* set length */
5870 DEBUG_P(PerlIO_printf(Perl_debug_log,
5871 "Screamer: done, len=%ld, string=|%.*s|\n",
5872 (long)SvCUR(sv),(int)SvCUR(sv),SvPVX(sv)));
5877 /*The big, slow, and stupid way */
5880 /* Need to work around EPOC SDK features */
5881 /* On WINS: MS VC5 generates calls to _chkstk, */
5882 /* if a `large' stack frame is allocated */
5883 /* gcc on MARM does not generate calls like these */
5889 register STDCHAR *bpe = buf + sizeof(buf);
5891 while ((i = PerlIO_getc(fp)) != EOF && (*bp++ = i) != rslast && bp < bpe)
5892 ; /* keep reading */
5896 cnt = PerlIO_read(fp,(char*)buf, sizeof(buf));
5897 /* Accomodate broken VAXC compiler, which applies U8 cast to
5898 * both args of ?: operator, causing EOF to change into 255
5900 if (cnt) { i = (U8)buf[cnt - 1]; } else { i = EOF; }
5904 sv_catpvn(sv, (char *) buf, cnt);
5906 sv_setpvn(sv, (char *) buf, cnt);
5908 if (i != EOF && /* joy */
5910 SvCUR(sv) < rslen ||
5911 memNE(SvPVX(sv) + SvCUR(sv) - rslen, rsptr, rslen)))
5915 * If we're reading from a TTY and we get a short read,
5916 * indicating that the user hit his EOF character, we need
5917 * to notice it now, because if we try to read from the TTY
5918 * again, the EOF condition will disappear.
5920 * The comparison of cnt to sizeof(buf) is an optimization
5921 * that prevents unnecessary calls to feof().
5925 if (!(cnt < sizeof(buf) && PerlIO_eof(fp)))
5930 if (rspara) { /* have to do this both before and after */
5931 while (i != EOF) { /* to make sure file boundaries work right */
5932 i = PerlIO_getc(fp);
5934 PerlIO_ungetc(fp,i);
5940 if (PerlIO_isutf8(fp))
5945 return (SvCUR(sv) - append) ? SvPVX(sv) : Nullch;
5951 Auto-increment of the value in the SV, doing string to numeric conversion
5952 if necessary. Handles 'get' magic.
5958 Perl_sv_inc(pTHX_ register SV *sv)
5967 if (SvTHINKFIRST(sv)) {
5968 if (SvREADONLY(sv) && SvFAKE(sv))
5969 sv_force_normal(sv);
5970 if (SvREADONLY(sv)) {
5971 if (PL_curcop != &PL_compiling)
5972 Perl_croak(aTHX_ PL_no_modify);
5976 if (SvAMAGIC(sv) && AMG_CALLun(sv,inc))
5978 i = PTR2IV(SvRV(sv));
5983 flags = SvFLAGS(sv);
5984 if ((flags & (SVp_NOK|SVp_IOK)) == SVp_NOK) {
5985 /* It's (privately or publicly) a float, but not tested as an
5986 integer, so test it to see. */
5988 flags = SvFLAGS(sv);
5990 if ((flags & SVf_IOK) || ((flags & (SVp_IOK | SVp_NOK)) == SVp_IOK)) {
5991 /* It's publicly an integer, or privately an integer-not-float */
5992 #ifdef PERL_PRESERVE_IVUV
5996 if (SvUVX(sv) == UV_MAX)
5997 sv_setnv(sv, UV_MAX_P1);
5999 (void)SvIOK_only_UV(sv);
6002 if (SvIVX(sv) == IV_MAX)
6003 sv_setuv(sv, (UV)IV_MAX + 1);
6005 (void)SvIOK_only(sv);
6011 if (flags & SVp_NOK) {
6012 (void)SvNOK_only(sv);
6017 if (!(flags & SVp_POK) || !*SvPVX(sv)) {
6018 if ((flags & SVTYPEMASK) < SVt_PVIV)
6019 sv_upgrade(sv, SVt_IV);
6020 (void)SvIOK_only(sv);
6025 while (isALPHA(*d)) d++;
6026 while (isDIGIT(*d)) d++;
6028 #ifdef PERL_PRESERVE_IVUV
6029 /* Got to punt this as an integer if needs be, but we don't issue
6030 warnings. Probably ought to make the sv_iv_please() that does
6031 the conversion if possible, and silently. */
6032 int numtype = grok_number(SvPVX(sv), SvCUR(sv), NULL);
6033 if (numtype && !(numtype & IS_NUMBER_INFINITY)) {
6034 /* Need to try really hard to see if it's an integer.
6035 9.22337203685478e+18 is an integer.
6036 but "9.22337203685478e+18" + 0 is UV=9223372036854779904
6037 so $a="9.22337203685478e+18"; $a+0; $a++
6038 needs to be the same as $a="9.22337203685478e+18"; $a++
6045 /* sv_2iv *should* have made this an NV */
6046 if (flags & SVp_NOK) {
6047 (void)SvNOK_only(sv);
6051 /* I don't think we can get here. Maybe I should assert this
6052 And if we do get here I suspect that sv_setnv will croak. NWC
6054 #if defined(USE_LONG_DOUBLE)
6055 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",
6056 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
6058 DEBUG_c(PerlIO_printf(Perl_debug_log,"sv_inc punt failed to convert '%s' to IOK or NOKp, UV=0x%"UVxf" NV=%"NVgf"\n",
6059 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
6062 #endif /* PERL_PRESERVE_IVUV */
6063 sv_setnv(sv,Atof(SvPVX(sv)) + 1.0);
6067 while (d >= SvPVX(sv)) {
6075 /* MKS: The original code here died if letters weren't consecutive.
6076 * at least it didn't have to worry about non-C locales. The
6077 * new code assumes that ('z'-'a')==('Z'-'A'), letters are
6078 * arranged in order (although not consecutively) and that only
6079 * [A-Za-z] are accepted by isALPHA in the C locale.
6081 if (*d != 'z' && *d != 'Z') {
6082 do { ++*d; } while (!isALPHA(*d));
6085 *(d--) -= 'z' - 'a';
6090 *(d--) -= 'z' - 'a' + 1;
6094 /* oh,oh, the number grew */
6095 SvGROW(sv, SvCUR(sv) + 2);
6097 for (d = SvPVX(sv) + SvCUR(sv); d > SvPVX(sv); d--)
6108 Auto-decrement of the value in the SV, doing string to numeric conversion
6109 if necessary. Handles 'get' magic.
6115 Perl_sv_dec(pTHX_ register SV *sv)
6123 if (SvTHINKFIRST(sv)) {
6124 if (SvREADONLY(sv) && SvFAKE(sv))
6125 sv_force_normal(sv);
6126 if (SvREADONLY(sv)) {
6127 if (PL_curcop != &PL_compiling)
6128 Perl_croak(aTHX_ PL_no_modify);
6132 if (SvAMAGIC(sv) && AMG_CALLun(sv,dec))
6134 i = PTR2IV(SvRV(sv));
6139 /* Unlike sv_inc we don't have to worry about string-never-numbers
6140 and keeping them magic. But we mustn't warn on punting */
6141 flags = SvFLAGS(sv);
6142 if ((flags & SVf_IOK) || ((flags & (SVp_IOK | SVp_NOK)) == SVp_IOK)) {
6143 /* It's publicly an integer, or privately an integer-not-float */
6144 #ifdef PERL_PRESERVE_IVUV
6148 if (SvUVX(sv) == 0) {
6149 (void)SvIOK_only(sv);
6153 (void)SvIOK_only_UV(sv);
6157 if (SvIVX(sv) == IV_MIN)
6158 sv_setnv(sv, (NV)IV_MIN - 1.0);
6160 (void)SvIOK_only(sv);
6166 if (flags & SVp_NOK) {
6168 (void)SvNOK_only(sv);
6171 if (!(flags & SVp_POK)) {
6172 if ((flags & SVTYPEMASK) < SVt_PVNV)
6173 sv_upgrade(sv, SVt_NV);
6175 (void)SvNOK_only(sv);
6178 #ifdef PERL_PRESERVE_IVUV
6180 int numtype = grok_number(SvPVX(sv), SvCUR(sv), NULL);
6181 if (numtype && !(numtype & IS_NUMBER_INFINITY)) {
6182 /* Need to try really hard to see if it's an integer.
6183 9.22337203685478e+18 is an integer.
6184 but "9.22337203685478e+18" + 0 is UV=9223372036854779904
6185 so $a="9.22337203685478e+18"; $a+0; $a--
6186 needs to be the same as $a="9.22337203685478e+18"; $a--
6193 /* sv_2iv *should* have made this an NV */
6194 if (flags & SVp_NOK) {
6195 (void)SvNOK_only(sv);
6199 /* I don't think we can get here. Maybe I should assert this
6200 And if we do get here I suspect that sv_setnv will croak. NWC
6202 #if defined(USE_LONG_DOUBLE)
6203 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",
6204 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
6206 DEBUG_c(PerlIO_printf(Perl_debug_log,"sv_dec punt failed to convert '%s' to IOK or NOKp, UV=0x%"UVxf" NV=%"NVgf"\n",
6207 SvPVX(sv), SvIVX(sv), SvNVX(sv)));
6211 #endif /* PERL_PRESERVE_IVUV */
6212 sv_setnv(sv,Atof(SvPVX(sv)) - 1.0); /* punt */
6216 =for apidoc sv_mortalcopy
6218 Creates a new SV which is a copy of the original SV (using C<sv_setsv>).
6219 The new SV is marked as mortal. It will be destroyed "soon", either by an
6220 explicit call to FREETMPS, or by an implicit call at places such as
6221 statement boundaries. See also C<sv_newmortal> and C<sv_2mortal>.
6226 /* Make a string that will exist for the duration of the expression
6227 * evaluation. Actually, it may have to last longer than that, but
6228 * hopefully we won't free it until it has been assigned to a
6229 * permanent location. */
6232 Perl_sv_mortalcopy(pTHX_ SV *oldstr)
6237 sv_setsv(sv,oldstr);
6239 PL_tmps_stack[++PL_tmps_ix] = sv;
6245 =for apidoc sv_newmortal
6247 Creates a new null SV which is mortal. The reference count of the SV is
6248 set to 1. It will be destroyed "soon", either by an explicit call to
6249 FREETMPS, or by an implicit call at places such as statement boundaries.
6250 See also C<sv_mortalcopy> and C<sv_2mortal>.
6256 Perl_sv_newmortal(pTHX)
6261 SvFLAGS(sv) = SVs_TEMP;
6263 PL_tmps_stack[++PL_tmps_ix] = sv;
6268 =for apidoc sv_2mortal
6270 Marks an existing SV as mortal. The SV will be destroyed "soon", either
6271 by an explicit call to FREETMPS, or by an implicit call at places such as
6272 statement boundaries. See also C<sv_newmortal> and C<sv_mortalcopy>.
6278 Perl_sv_2mortal(pTHX_ register SV *sv)
6282 if (SvREADONLY(sv) && SvIMMORTAL(sv))
6285 PL_tmps_stack[++PL_tmps_ix] = sv;
6293 Creates a new SV and copies a string into it. The reference count for the
6294 SV is set to 1. If C<len> is zero, Perl will compute the length using
6295 strlen(). For efficiency, consider using C<newSVpvn> instead.
6301 Perl_newSVpv(pTHX_ const char *s, STRLEN len)
6308 sv_setpvn(sv,s,len);
6313 =for apidoc newSVpvn
6315 Creates a new SV and copies a string into it. The reference count for the
6316 SV is set to 1. Note that if C<len> is zero, Perl will create a zero length
6317 string. You are responsible for ensuring that the source string is at least
6324 Perl_newSVpvn(pTHX_ const char *s, STRLEN len)
6329 sv_setpvn(sv,s,len);
6334 =for apidoc newSVpvn_share
6336 Creates a new SV with its SvPVX pointing to a shared string in the string
6337 table. If the string does not already exist in the table, it is created
6338 first. Turns on READONLY and FAKE. The string's hash is stored in the UV
6339 slot of the SV; if the C<hash> parameter is non-zero, that value is used;
6340 otherwise the hash is computed. The idea here is that as the string table
6341 is used for shared hash keys these strings will have SvPVX == HeKEY and
6342 hash lookup will avoid string compare.
6348 Perl_newSVpvn_share(pTHX_ const char *src, I32 len, U32 hash)
6351 bool is_utf8 = FALSE;
6353 STRLEN tmplen = -len;
6355 /* See the note in hv.c:hv_fetch() --jhi */
6356 src = (char*)bytes_from_utf8((U8*)src, &tmplen, &is_utf8);
6360 PERL_HASH(hash, src, len);
6362 sv_upgrade(sv, SVt_PVIV);
6363 SvPVX(sv) = sharepvn(src, is_utf8?-len:len, hash);
6376 #if defined(PERL_IMPLICIT_CONTEXT)
6378 /* pTHX_ magic can't cope with varargs, so this is a no-context
6379 * version of the main function, (which may itself be aliased to us).
6380 * Don't access this version directly.
6384 Perl_newSVpvf_nocontext(const char* pat, ...)
6389 va_start(args, pat);
6390 sv = vnewSVpvf(pat, &args);
6397 =for apidoc newSVpvf
6399 Creates a new SV and initializes it with the string formatted like
6406 Perl_newSVpvf(pTHX_ const char* pat, ...)
6410 va_start(args, pat);
6411 sv = vnewSVpvf(pat, &args);
6416 /* backend for newSVpvf() and newSVpvf_nocontext() */
6419 Perl_vnewSVpvf(pTHX_ const char* pat, va_list* args)
6423 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
6430 Creates a new SV and copies a floating point value into it.
6431 The reference count for the SV is set to 1.
6437 Perl_newSVnv(pTHX_ NV n)
6449 Creates a new SV and copies an integer into it. The reference count for the
6456 Perl_newSViv(pTHX_ IV i)
6468 Creates a new SV and copies an unsigned integer into it.
6469 The reference count for the SV is set to 1.
6475 Perl_newSVuv(pTHX_ UV u)
6485 =for apidoc newRV_noinc
6487 Creates an RV wrapper for an SV. The reference count for the original
6488 SV is B<not> incremented.
6494 Perl_newRV_noinc(pTHX_ SV *tmpRef)
6499 sv_upgrade(sv, SVt_RV);
6506 /* newRV_inc is the official function name to use now.
6507 * newRV_inc is in fact #defined to newRV in sv.h
6511 Perl_newRV(pTHX_ SV *tmpRef)
6513 return newRV_noinc(SvREFCNT_inc(tmpRef));
6519 Creates a new SV which is an exact duplicate of the original SV.
6526 Perl_newSVsv(pTHX_ register SV *old)
6532 if (SvTYPE(old) == SVTYPEMASK) {
6533 if (ckWARN_d(WARN_INTERNAL))
6534 Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "semi-panic: attempt to dup freed string");
6549 =for apidoc sv_reset
6551 Underlying implementation for the C<reset> Perl function.
6552 Note that the perl-level function is vaguely deprecated.
6558 Perl_sv_reset(pTHX_ register char *s, HV *stash)
6566 char todo[PERL_UCHAR_MAX+1];
6571 if (!*s) { /* reset ?? searches */
6572 for (pm = HvPMROOT(stash); pm; pm = pm->op_pmnext) {
6573 pm->op_pmdynflags &= ~PMdf_USED;
6578 /* reset variables */
6580 if (!HvARRAY(stash))
6583 Zero(todo, 256, char);
6585 i = (unsigned char)*s;
6589 max = (unsigned char)*s++;
6590 for ( ; i <= max; i++) {
6593 for (i = 0; i <= (I32) HvMAX(stash); i++) {
6594 for (entry = HvARRAY(stash)[i];
6596 entry = HeNEXT(entry))
6598 if (!todo[(U8)*HeKEY(entry)])
6600 gv = (GV*)HeVAL(entry);
6602 if (SvTHINKFIRST(sv)) {
6603 if (!SvREADONLY(sv) && SvROK(sv))
6608 if (SvTYPE(sv) >= SVt_PV) {
6610 if (SvPVX(sv) != Nullch)
6617 if (GvHV(gv) && !HvNAME(GvHV(gv))) {
6619 #ifdef USE_ENVIRON_ARRAY
6621 environ[0] = Nullch;
6632 Using various gambits, try to get an IO from an SV: the IO slot if its a
6633 GV; or the recursive result if we're an RV; or the IO slot of the symbol
6634 named after the PV if we're a string.
6640 Perl_sv_2io(pTHX_ SV *sv)
6646 switch (SvTYPE(sv)) {
6654 Perl_croak(aTHX_ "Bad filehandle: %s", GvNAME(gv));
6658 Perl_croak(aTHX_ PL_no_usym, "filehandle");
6660 return sv_2io(SvRV(sv));
6661 gv = gv_fetchpv(SvPV(sv,n_a), FALSE, SVt_PVIO);
6667 Perl_croak(aTHX_ "Bad filehandle: %s", SvPV(sv,n_a));
6676 Using various gambits, try to get a CV from an SV; in addition, try if
6677 possible to set C<*st> and C<*gvp> to the stash and GV associated with it.
6683 Perl_sv_2cv(pTHX_ SV *sv, HV **st, GV **gvp, I32 lref)
6690 return *gvp = Nullgv, Nullcv;
6691 switch (SvTYPE(sv)) {
6710 SV **sp = &sv; /* Used in tryAMAGICunDEREF macro. */
6711 tryAMAGICunDEREF(to_cv);
6714 if (SvTYPE(sv) == SVt_PVCV) {
6723 Perl_croak(aTHX_ "Not a subroutine reference");
6728 gv = gv_fetchpv(SvPV(sv, n_a), lref, SVt_PVCV);
6734 if (lref && !GvCVu(gv)) {
6737 tmpsv = NEWSV(704,0);
6738 gv_efullname3(tmpsv, gv, Nullch);
6739 /* XXX this is probably not what they think they're getting.
6740 * It has the same effect as "sub name;", i.e. just a forward
6742 newSUB(start_subparse(FALSE, 0),
6743 newSVOP(OP_CONST, 0, tmpsv),
6748 Perl_croak(aTHX_ "Unable to create sub named \"%s\"", SvPV(sv,n_a));
6757 Returns true if the SV has a true value by Perl's rules.
6758 Use the C<SvTRUE> macro instead, which may call C<sv_true()> or may
6759 instead use an in-line version.
6765 Perl_sv_true(pTHX_ register SV *sv)
6771 if ((tXpv = (XPV*)SvANY(sv)) &&
6772 (tXpv->xpv_cur > 1 ||
6773 (tXpv->xpv_cur && *tXpv->xpv_pv != '0')))
6780 return SvIVX(sv) != 0;
6783 return SvNVX(sv) != 0.0;
6785 return sv_2bool(sv);
6793 A private implementation of the C<SvIVx> macro for compilers which can't
6794 cope with complex macro expressions. Always use the macro instead.
6800 Perl_sv_iv(pTHX_ register SV *sv)
6804 return (IV)SvUVX(sv);
6813 A private implementation of the C<SvUVx> macro for compilers which can't
6814 cope with complex macro expressions. Always use the macro instead.
6820 Perl_sv_uv(pTHX_ register SV *sv)
6825 return (UV)SvIVX(sv);
6833 A private implementation of the C<SvNVx> macro for compilers which can't
6834 cope with complex macro expressions. Always use the macro instead.
6840 Perl_sv_nv(pTHX_ register SV *sv)
6850 A private implementation of the C<SvPV_nolen> macro for compilers which can't
6851 cope with complex macro expressions. Always use the macro instead.
6857 Perl_sv_pv(pTHX_ SV *sv)
6864 return sv_2pv(sv, &n_a);
6870 A private implementation of the C<SvPV> macro for compilers which can't
6871 cope with complex macro expressions. Always use the macro instead.
6877 Perl_sv_pvn(pTHX_ SV *sv, STRLEN *lp)
6883 return sv_2pv(sv, lp);
6886 /* For -DCRIPPLED_CC only. See also C<sv_2pv_flags()>.
6890 Perl_sv_pvn_nomg(pTHX_ register SV *sv, STRLEN *lp)
6896 return sv_2pv_flags(sv, lp, 0);
6900 =for apidoc sv_pvn_force
6902 Get a sensible string out of the SV somehow.
6903 A private implementation of the C<SvPV_force> macro for compilers which
6904 can't cope with complex macro expressions. Always use the macro instead.
6910 Perl_sv_pvn_force(pTHX_ SV *sv, STRLEN *lp)
6912 return sv_pvn_force_flags(sv, lp, SV_GMAGIC);
6916 =for apidoc sv_pvn_force_flags
6918 Get a sensible string out of the SV somehow.
6919 If C<flags> has C<SV_GMAGIC> bit set, will C<mg_get> on C<sv> if
6920 appropriate, else not. C<sv_pvn_force> and C<sv_pvn_force_nomg> are
6921 implemented in terms of this function.
6922 You normally want to use the various wrapper macros instead: see
6923 C<SvPV_force> and C<SvPV_force_nomg>
6929 Perl_sv_pvn_force_flags(pTHX_ SV *sv, STRLEN *lp, I32 flags)
6933 if (SvTHINKFIRST(sv) && !SvROK(sv))
6934 sv_force_normal(sv);
6940 if (SvTYPE(sv) > SVt_PVLV && SvTYPE(sv) != SVt_PVFM) {
6941 Perl_croak(aTHX_ "Can't coerce %s to string in %s", sv_reftype(sv,0),
6945 s = sv_2pv_flags(sv, lp, flags);
6946 if (s != SvPVX(sv)) { /* Almost, but not quite, sv_setpvn() */
6951 (void)SvUPGRADE(sv, SVt_PV); /* Never FALSE */
6952 SvGROW(sv, len + 1);
6953 Move(s,SvPVX(sv),len,char);
6958 SvPOK_on(sv); /* validate pointer */
6960 DEBUG_c(PerlIO_printf(Perl_debug_log, "0x%"UVxf" 2pv(%s)\n",
6961 PTR2UV(sv),SvPVX(sv)));
6968 =for apidoc sv_pvbyte
6970 A private implementation of the C<SvPVbyte_nolen> macro for compilers
6971 which can't cope with complex macro expressions. Always use the macro
6978 Perl_sv_pvbyte(pTHX_ SV *sv)
6980 sv_utf8_downgrade(sv,0);
6985 =for apidoc sv_pvbyten
6987 A private implementation of the C<SvPVbyte> macro for compilers
6988 which can't cope with complex macro expressions. Always use the macro
6995 Perl_sv_pvbyten(pTHX_ SV *sv, STRLEN *lp)
6997 sv_utf8_downgrade(sv,0);
6998 return sv_pvn(sv,lp);
7002 =for apidoc sv_pvbyten_force
7004 A private implementation of the C<SvPVbytex_force> macro for compilers
7005 which can't cope with complex macro expressions. Always use the macro
7012 Perl_sv_pvbyten_force(pTHX_ SV *sv, STRLEN *lp)
7014 sv_utf8_downgrade(sv,0);
7015 return sv_pvn_force(sv,lp);
7019 =for apidoc sv_pvutf8
7021 A private implementation of the C<SvPVutf8_nolen> macro for compilers
7022 which can't cope with complex macro expressions. Always use the macro
7029 Perl_sv_pvutf8(pTHX_ SV *sv)
7031 sv_utf8_upgrade(sv);
7036 =for apidoc sv_pvutf8n
7038 A private implementation of the C<SvPVutf8> macro for compilers
7039 which can't cope with complex macro expressions. Always use the macro
7046 Perl_sv_pvutf8n(pTHX_ SV *sv, STRLEN *lp)
7048 sv_utf8_upgrade(sv);
7049 return sv_pvn(sv,lp);
7053 =for apidoc sv_pvutf8n_force
7055 A private implementation of the C<SvPVutf8_force> macro for compilers
7056 which can't cope with complex macro expressions. Always use the macro
7063 Perl_sv_pvutf8n_force(pTHX_ SV *sv, STRLEN *lp)
7065 sv_utf8_upgrade(sv);
7066 return sv_pvn_force(sv,lp);
7070 =for apidoc sv_reftype
7072 Returns a string describing what the SV is a reference to.
7078 Perl_sv_reftype(pTHX_ SV *sv, int ob)
7080 if (ob && SvOBJECT(sv)) {
7081 HV *svs = SvSTASH(sv);
7082 /* [20011101.072] This bandaid for C<package;> should eventually
7083 be removed. AMS 20011103 */
7084 return (svs ? HvNAME(svs) : "<none>");
7087 switch (SvTYPE(sv)) {
7101 case SVt_PVLV: return "LVALUE";
7102 case SVt_PVAV: return "ARRAY";
7103 case SVt_PVHV: return "HASH";
7104 case SVt_PVCV: return "CODE";
7105 case SVt_PVGV: return "GLOB";
7106 case SVt_PVFM: return "FORMAT";
7107 case SVt_PVIO: return "IO";
7108 default: return "UNKNOWN";
7114 =for apidoc sv_isobject
7116 Returns a boolean indicating whether the SV is an RV pointing to a blessed
7117 object. If the SV is not an RV, or if the object is not blessed, then this
7124 Perl_sv_isobject(pTHX_ SV *sv)
7141 Returns a boolean indicating whether the SV is blessed into the specified
7142 class. This does not check for subtypes; use C<sv_derived_from> to verify
7143 an inheritance relationship.
7149 Perl_sv_isa(pTHX_ SV *sv, const char *name)
7161 return strEQ(HvNAME(SvSTASH(sv)), name);
7167 Creates a new SV for the RV, C<rv>, to point to. If C<rv> is not an RV then
7168 it will be upgraded to one. If C<classname> is non-null then the new SV will
7169 be blessed in the specified package. The new SV is returned and its
7170 reference count is 1.
7176 Perl_newSVrv(pTHX_ SV *rv, const char *classname)
7182 SV_CHECK_THINKFIRST(rv);
7185 if (SvTYPE(rv) >= SVt_PVMG) {
7186 U32 refcnt = SvREFCNT(rv);
7190 SvREFCNT(rv) = refcnt;
7193 if (SvTYPE(rv) < SVt_RV)
7194 sv_upgrade(rv, SVt_RV);
7195 else if (SvTYPE(rv) > SVt_RV) {
7196 (void)SvOOK_off(rv);
7197 if (SvPVX(rv) && SvLEN(rv))
7198 Safefree(SvPVX(rv));
7208 HV* stash = gv_stashpv(classname, TRUE);
7209 (void)sv_bless(rv, stash);
7215 =for apidoc sv_setref_pv
7217 Copies a pointer into a new SV, optionally blessing the SV. The C<rv>
7218 argument will be upgraded to an RV. That RV will be modified to point to
7219 the new SV. If the C<pv> argument is NULL then C<PL_sv_undef> will be placed
7220 into the SV. The C<classname> argument indicates the package for the
7221 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
7222 will be returned and will have a reference count of 1.
7224 Do not use with other Perl types such as HV, AV, SV, CV, because those
7225 objects will become corrupted by the pointer copy process.
7227 Note that C<sv_setref_pvn> copies the string while this copies the pointer.
7233 Perl_sv_setref_pv(pTHX_ SV *rv, const char *classname, void *pv)
7236 sv_setsv(rv, &PL_sv_undef);
7240 sv_setiv(newSVrv(rv,classname), PTR2IV(pv));
7245 =for apidoc sv_setref_iv
7247 Copies an integer into a new SV, optionally blessing the SV. The C<rv>
7248 argument will be upgraded to an RV. That RV will be modified to point to
7249 the new SV. The C<classname> argument indicates the package for the
7250 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
7251 will be returned and will have a reference count of 1.
7257 Perl_sv_setref_iv(pTHX_ SV *rv, const char *classname, IV iv)
7259 sv_setiv(newSVrv(rv,classname), iv);
7264 =for apidoc sv_setref_uv
7266 Copies an unsigned integer into a new SV, optionally blessing the SV. The C<rv>
7267 argument will be upgraded to an RV. That RV will be modified to point to
7268 the new SV. The C<classname> argument indicates the package for the
7269 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
7270 will be returned and will have a reference count of 1.
7276 Perl_sv_setref_uv(pTHX_ SV *rv, const char *classname, UV uv)
7278 sv_setuv(newSVrv(rv,classname), uv);
7283 =for apidoc sv_setref_nv
7285 Copies a double into a new SV, optionally blessing the SV. The C<rv>
7286 argument will be upgraded to an RV. That RV will be modified to point to
7287 the new SV. The C<classname> argument indicates the package for the
7288 blessing. Set C<classname> to C<Nullch> to avoid the blessing. The new SV
7289 will be returned and will have a reference count of 1.
7295 Perl_sv_setref_nv(pTHX_ SV *rv, const char *classname, NV nv)
7297 sv_setnv(newSVrv(rv,classname), nv);
7302 =for apidoc sv_setref_pvn
7304 Copies a string into a new SV, optionally blessing the SV. The length of the
7305 string must be specified with C<n>. The C<rv> argument will be upgraded to
7306 an RV. That RV will be modified to point to the new SV. The C<classname>
7307 argument indicates the package for the blessing. Set C<classname> to
7308 C<Nullch> to avoid the blessing. The new SV will be returned and will have
7309 a reference count of 1.
7311 Note that C<sv_setref_pv> copies the pointer while this copies the string.
7317 Perl_sv_setref_pvn(pTHX_ SV *rv, const char *classname, char *pv, STRLEN n)
7319 sv_setpvn(newSVrv(rv,classname), pv, n);
7324 =for apidoc sv_bless
7326 Blesses an SV into a specified package. The SV must be an RV. The package
7327 must be designated by its stash (see C<gv_stashpv()>). The reference count
7328 of the SV is unaffected.
7334 Perl_sv_bless(pTHX_ SV *sv, HV *stash)
7338 Perl_croak(aTHX_ "Can't bless non-reference value");
7340 if (SvFLAGS(tmpRef) & (SVs_OBJECT|SVf_READONLY)) {
7341 if (SvREADONLY(tmpRef))
7342 Perl_croak(aTHX_ PL_no_modify);
7343 if (SvOBJECT(tmpRef)) {
7344 if (SvTYPE(tmpRef) != SVt_PVIO)
7346 SvREFCNT_dec(SvSTASH(tmpRef));
7349 SvOBJECT_on(tmpRef);
7350 if (SvTYPE(tmpRef) != SVt_PVIO)
7352 (void)SvUPGRADE(tmpRef, SVt_PVMG);
7353 SvSTASH(tmpRef) = (HV*)SvREFCNT_inc(stash);
7360 if(SvSMAGICAL(tmpRef))
7361 if(mg_find(tmpRef, PERL_MAGIC_ext) || mg_find(tmpRef, PERL_MAGIC_uvar))
7369 /* Downgrades a PVGV to a PVMG.
7371 * XXX This function doesn't actually appear to be used anywhere
7376 S_sv_unglob(pTHX_ SV *sv)
7380 assert(SvTYPE(sv) == SVt_PVGV);
7385 SvREFCNT_dec(GvSTASH(sv));
7386 GvSTASH(sv) = Nullhv;
7388 sv_unmagic(sv, PERL_MAGIC_glob);
7389 Safefree(GvNAME(sv));
7392 /* need to keep SvANY(sv) in the right arena */
7393 xpvmg = new_XPVMG();
7394 StructCopy(SvANY(sv), xpvmg, XPVMG);
7395 del_XPVGV(SvANY(sv));
7398 SvFLAGS(sv) &= ~SVTYPEMASK;
7399 SvFLAGS(sv) |= SVt_PVMG;
7403 =for apidoc sv_unref_flags
7405 Unsets the RV status of the SV, and decrements the reference count of
7406 whatever was being referenced by the RV. This can almost be thought of
7407 as a reversal of C<newSVrv>. The C<cflags> argument can contain
7408 C<SV_IMMEDIATE_UNREF> to force the reference count to be decremented
7409 (otherwise the decrementing is conditional on the reference count being
7410 different from one or the reference being a readonly SV).
7417 Perl_sv_unref_flags(pTHX_ SV *sv, U32 flags)
7421 if (SvWEAKREF(sv)) {
7429 if (SvREFCNT(rv) != 1 || SvREADONLY(rv) || flags) /* SV_IMMEDIATE_UNREF */
7431 else /* XXX Hack, but hard to make $a=$a->[1] work otherwise */
7432 sv_2mortal(rv); /* Schedule for freeing later */
7436 =for apidoc sv_unref
7438 Unsets the RV status of the SV, and decrements the reference count of
7439 whatever was being referenced by the RV. This can almost be thought of
7440 as a reversal of C<newSVrv>. This is C<sv_unref_flags> with the C<flag>
7441 being zero. See C<SvROK_off>.
7447 Perl_sv_unref(pTHX_ SV *sv)
7449 sv_unref_flags(sv, 0);
7453 =for apidoc sv_taint
7455 Taint an SV. Use C<SvTAINTED_on> instead.
7460 Perl_sv_taint(pTHX_ SV *sv)
7462 sv_magic((sv), Nullsv, PERL_MAGIC_taint, Nullch, 0);
7466 =for apidoc sv_untaint
7468 Untaint an SV. Use C<SvTAINTED_off> instead.
7473 Perl_sv_untaint(pTHX_ SV *sv)
7475 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) {
7476 MAGIC *mg = mg_find(sv, PERL_MAGIC_taint);
7483 =for apidoc sv_tainted
7485 Test an SV for taintedness. Use C<SvTAINTED> instead.
7490 Perl_sv_tainted(pTHX_ SV *sv)
7492 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) {
7493 MAGIC *mg = mg_find(sv, PERL_MAGIC_taint);
7494 if (mg && ((mg->mg_len & 1) || ((mg->mg_len & 2) && mg->mg_obj == sv)))
7501 =for apidoc sv_setpviv
7503 Copies an integer into the given SV, also updating its string value.
7504 Does not handle 'set' magic. See C<sv_setpviv_mg>.
7510 Perl_sv_setpviv(pTHX_ SV *sv, IV iv)
7512 char buf[TYPE_CHARS(UV)];
7514 char *ptr = uiv_2buf(buf, iv, 0, 0, &ebuf);
7516 sv_setpvn(sv, ptr, ebuf - ptr);
7520 =for apidoc sv_setpviv_mg
7522 Like C<sv_setpviv>, but also handles 'set' magic.
7528 Perl_sv_setpviv_mg(pTHX_ SV *sv, IV iv)
7530 char buf[TYPE_CHARS(UV)];
7532 char *ptr = uiv_2buf(buf, iv, 0, 0, &ebuf);
7534 sv_setpvn(sv, ptr, ebuf - ptr);
7538 #if defined(PERL_IMPLICIT_CONTEXT)
7540 /* pTHX_ magic can't cope with varargs, so this is a no-context
7541 * version of the main function, (which may itself be aliased to us).
7542 * Don't access this version directly.
7546 Perl_sv_setpvf_nocontext(SV *sv, const char* pat, ...)
7550 va_start(args, pat);
7551 sv_vsetpvf(sv, pat, &args);
7555 /* pTHX_ magic can't cope with varargs, so this is a no-context
7556 * version of the main function, (which may itself be aliased to us).
7557 * Don't access this version directly.
7561 Perl_sv_setpvf_mg_nocontext(SV *sv, const char* pat, ...)
7565 va_start(args, pat);
7566 sv_vsetpvf_mg(sv, pat, &args);
7572 =for apidoc sv_setpvf
7574 Processes its arguments like C<sprintf> and sets an SV to the formatted
7575 output. Does not handle 'set' magic. See C<sv_setpvf_mg>.
7581 Perl_sv_setpvf(pTHX_ SV *sv, const char* pat, ...)
7584 va_start(args, pat);
7585 sv_vsetpvf(sv, pat, &args);
7589 /* backend for C<sv_setpvf> and C<sv_setpvf_nocontext> */
7592 Perl_sv_vsetpvf(pTHX_ SV *sv, const char* pat, va_list* args)
7594 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
7598 =for apidoc sv_setpvf_mg
7600 Like C<sv_setpvf>, but also handles 'set' magic.
7606 Perl_sv_setpvf_mg(pTHX_ SV *sv, const char* pat, ...)
7609 va_start(args, pat);
7610 sv_vsetpvf_mg(sv, pat, &args);
7614 /* backend for C<sv_setpvf_mg> C<setpvf_mg_nocontext> */
7617 Perl_sv_vsetpvf_mg(pTHX_ SV *sv, const char* pat, va_list* args)
7619 sv_vsetpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
7623 #if defined(PERL_IMPLICIT_CONTEXT)
7625 /* pTHX_ magic can't cope with varargs, so this is a no-context
7626 * version of the main function, (which may itself be aliased to us).
7627 * Don't access this version directly.
7631 Perl_sv_catpvf_nocontext(SV *sv, const char* pat, ...)
7635 va_start(args, pat);
7636 sv_vcatpvf(sv, pat, &args);
7640 /* pTHX_ magic can't cope with varargs, so this is a no-context
7641 * version of the main function, (which may itself be aliased to us).
7642 * Don't access this version directly.
7646 Perl_sv_catpvf_mg_nocontext(SV *sv, const char* pat, ...)
7650 va_start(args, pat);
7651 sv_vcatpvf_mg(sv, pat, &args);
7657 =for apidoc sv_catpvf
7659 Processes its arguments like C<sprintf> and appends the formatted
7660 output to an SV. If the appended data contains "wide" characters
7661 (including, but not limited to, SVs with a UTF-8 PV formatted with %s,
7662 and characters >255 formatted with %c), the original SV might get
7663 upgraded to UTF-8. Handles 'get' magic, but not 'set' magic.
7664 C<SvSETMAGIC()> must typically be called after calling this function
7665 to handle 'set' magic.
7670 Perl_sv_catpvf(pTHX_ SV *sv, const char* pat, ...)
7673 va_start(args, pat);
7674 sv_vcatpvf(sv, pat, &args);
7678 /* backend for C<sv_catpvf> and C<catpvf_mg_nocontext> */
7681 Perl_sv_vcatpvf(pTHX_ SV *sv, const char* pat, va_list* args)
7683 sv_vcatpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
7687 =for apidoc sv_catpvf_mg
7689 Like C<sv_catpvf>, but also handles 'set' magic.
7695 Perl_sv_catpvf_mg(pTHX_ SV *sv, const char* pat, ...)
7698 va_start(args, pat);
7699 sv_vcatpvf_mg(sv, pat, &args);
7703 /* backend for C<catpvf_mg> and C<catpvf_mg_nocontext> */
7706 Perl_sv_vcatpvf_mg(pTHX_ SV *sv, const char* pat, va_list* args)
7708 sv_vcatpvfn(sv, pat, strlen(pat), args, Null(SV**), 0, Null(bool*));
7713 =for apidoc sv_vsetpvfn
7715 Works like C<vcatpvfn> but copies the text into the SV instead of
7718 Usually used via one of its frontends C<sv_setpvf> and C<sv_setpvf_mg>.
7724 Perl_sv_vsetpvfn(pTHX_ SV *sv, const char *pat, STRLEN patlen, va_list *args, SV **svargs, I32 svmax, bool *maybe_tainted)
7726 sv_setpvn(sv, "", 0);
7727 sv_vcatpvfn(sv, pat, patlen, args, svargs, svmax, maybe_tainted);
7730 /* private function for use in sv_vcatpvfn via the EXPECT_NUMBER macro */
7733 S_expect_number(pTHX_ char** pattern)
7736 switch (**pattern) {
7737 case '1': case '2': case '3':
7738 case '4': case '5': case '6':
7739 case '7': case '8': case '9':
7740 while (isDIGIT(**pattern))
7741 var = var * 10 + (*(*pattern)++ - '0');
7745 #define EXPECT_NUMBER(pattern, var) (var = S_expect_number(aTHX_ &pattern))
7748 =for apidoc sv_vcatpvfn
7750 Processes its arguments like C<vsprintf> and appends the formatted output
7751 to an SV. Uses an array of SVs if the C style variable argument list is
7752 missing (NULL). When running with taint checks enabled, indicates via
7753 C<maybe_tainted> if results are untrustworthy (often due to the use of
7756 Usually used via one of its frontends C<sv_catpvf> and C<sv_catpvf_mg>.
7762 Perl_sv_vcatpvfn(pTHX_ SV *sv, const char *pat, STRLEN patlen, va_list *args, SV **svargs, I32 svmax, bool *maybe_tainted)
7769 static char nullstr[] = "(null)";
7771 bool has_utf8 = FALSE; /* has the result utf8? */
7773 /* no matter what, this is a string now */
7774 (void)SvPV_force(sv, origlen);
7776 /* special-case "", "%s", and "%_" */
7779 if (patlen == 2 && pat[0] == '%') {
7783 char *s = va_arg(*args, char*);
7784 sv_catpv(sv, s ? s : nullstr);
7786 else if (svix < svmax) {
7787 sv_catsv(sv, *svargs);
7788 if (DO_UTF8(*svargs))
7794 argsv = va_arg(*args, SV*);
7795 sv_catsv(sv, argsv);
7800 /* See comment on '_' below */
7805 if (!args && svix < svmax && DO_UTF8(*svargs))
7808 patend = (char*)pat + patlen;
7809 for (p = (char*)pat; p < patend; p = q) {
7812 bool vectorize = FALSE;
7813 bool vectorarg = FALSE;
7814 bool vec_utf8 = FALSE;
7820 bool has_precis = FALSE;
7822 bool is_utf8 = FALSE; /* is this item utf8? */
7825 U8 utf8buf[UTF8_MAXLEN+1];
7826 STRLEN esignlen = 0;
7828 char *eptr = Nullch;
7830 /* Times 4: a decimal digit takes more than 3 binary digits.
7831 * NV_DIG: mantissa takes than many decimal digits.
7832 * Plus 32: Playing safe. */
7833 char ebuf[IV_DIG * 4 + NV_DIG + 32];
7834 /* large enough for "%#.#f" --chip */
7835 /* what about long double NVs? --jhi */
7838 U8 *vecstr = Null(U8*);
7850 STRLEN dotstrlen = 1;
7851 I32 efix = 0; /* explicit format parameter index */
7852 I32 ewix = 0; /* explicit width index */
7853 I32 epix = 0; /* explicit precision index */
7854 I32 evix = 0; /* explicit vector index */
7855 bool asterisk = FALSE;
7857 /* echo everything up to the next format specification */
7858 for (q = p; q < patend && *q != '%'; ++q) ;
7860 sv_catpvn(sv, p, q - p);
7867 We allow format specification elements in this order:
7868 \d+\$ explicit format parameter index
7870 \*?(\d+\$)?v vector with optional (optionally specified) arg
7871 \d+|\*(\d+\$)? width using optional (optionally specified) arg
7872 \.(\d*|\*(\d+\$)?) precision using optional (optionally specified) arg
7874 [%bcdefginopsux_DFOUX] format (mandatory)
7876 if (EXPECT_NUMBER(q, width)) {
7917 if (EXPECT_NUMBER(q, ewix))
7926 if ((vectorarg = asterisk)) {
7936 EXPECT_NUMBER(q, width);
7941 vecsv = va_arg(*args, SV*);
7943 vecsv = (evix ? evix <= svmax : svix < svmax) ?
7944 svargs[ewix ? ewix-1 : svix++] : &PL_sv_undef;
7945 dotstr = SvPVx(vecsv, dotstrlen);
7950 vecsv = va_arg(*args, SV*);
7951 vecstr = (U8*)SvPVx(vecsv,veclen);
7952 vec_utf8 = DO_UTF8(vecsv);
7954 else if (efix ? efix <= svmax : svix < svmax) {
7955 vecsv = svargs[efix ? efix-1 : svix++];
7956 vecstr = (U8*)SvPVx(vecsv,veclen);
7957 vec_utf8 = DO_UTF8(vecsv);
7967 i = va_arg(*args, int);
7969 i = (ewix ? ewix <= svmax : svix < svmax) ?
7970 SvIVx(svargs[ewix ? ewix-1 : svix++]) : 0;
7972 width = (i < 0) ? -i : i;
7982 if (EXPECT_NUMBER(q, epix) && *q++ != '$') /* epix currently unused */
7985 i = va_arg(*args, int);
7987 i = (ewix ? ewix <= svmax : svix < svmax)
7988 ? SvIVx(svargs[ewix ? ewix-1 : svix++]) : 0;
7989 precis = (i < 0) ? 0 : i;
7994 precis = precis * 10 + (*q++ - '0');
8002 #if defined(HAS_QUAD) || (defined(HAS_LONG_DOUBLE) && defined(USE_LONG_DOUBLE))
8013 #if defined(HAS_QUAD) || (defined(HAS_LONG_DOUBLE) && defined(USE_LONG_DOUBLE))
8014 if (*(q + 1) == 'l') { /* lld, llf */
8037 argsv = (efix ? efix <= svmax : svix < svmax) ?
8038 svargs[efix ? efix-1 : svix++] : &PL_sv_undef;
8045 uv = args ? va_arg(*args, int) : SvIVx(argsv);
8047 (!UNI_IS_INVARIANT(uv) && SvUTF8(sv)))
8049 eptr = (char*)utf8buf;
8050 elen = uvchr_to_utf8((U8*)eptr, uv) - utf8buf;
8062 eptr = va_arg(*args, char*);
8064 #ifdef MACOS_TRADITIONAL
8065 /* On MacOS, %#s format is used for Pascal strings */
8070 elen = strlen(eptr);
8073 elen = sizeof nullstr - 1;
8077 eptr = SvPVx(argsv, elen);
8078 if (DO_UTF8(argsv)) {
8079 if (has_precis && precis < elen) {
8081 sv_pos_u2b(argsv, &p, 0); /* sticks at end */
8084 if (width) { /* fudge width (can't fudge elen) */
8085 width += elen - sv_len_utf8(argsv);
8094 * The "%_" hack might have to be changed someday,
8095 * if ISO or ANSI decide to use '_' for something.
8096 * So we keep it hidden from users' code.
8100 argsv = va_arg(*args, SV*);
8101 eptr = SvPVx(argsv, elen);
8107 if (has_precis && elen > precis)
8116 uv = PTR2UV(args ? va_arg(*args, void*) : argsv);
8134 uv = utf8n_to_uvchr(vecstr, veclen, &ulen,
8143 esignbuf[esignlen++] = plus;
8147 case 'h': iv = (short)va_arg(*args, int); break;
8148 default: iv = va_arg(*args, int); break;
8149 case 'l': iv = va_arg(*args, long); break;
8150 case 'V': iv = va_arg(*args, IV); break;
8152 case 'q': iv = va_arg(*args, Quad_t); break;
8159 case 'h': iv = (short)iv; break;
8161 case 'l': iv = (long)iv; break;
8164 case 'q': iv = (Quad_t)iv; break;
8168 if ( !vectorize ) /* we already set uv above */
8173 esignbuf[esignlen++] = plus;
8177 esignbuf[esignlen++] = '-';
8220 uv = utf8n_to_uvchr(vecstr, veclen, &ulen,
8231 case 'h': uv = (unsigned short)va_arg(*args, unsigned); break;
8232 default: uv = va_arg(*args, unsigned); break;
8233 case 'l': uv = va_arg(*args, unsigned long); break;
8234 case 'V': uv = va_arg(*args, UV); break;
8236 case 'q': uv = va_arg(*args, Quad_t); break;
8243 case 'h': uv = (unsigned short)uv; break;
8245 case 'l': uv = (unsigned long)uv; break;
8248 case 'q': uv = (Quad_t)uv; break;
8254 eptr = ebuf + sizeof ebuf;
8260 p = (char*)((c == 'X')
8261 ? "0123456789ABCDEF" : "0123456789abcdef");
8267 esignbuf[esignlen++] = '0';
8268 esignbuf[esignlen++] = c; /* 'x' or 'X' */
8274 *--eptr = '0' + dig;
8276 if (alt && *eptr != '0')
8282 *--eptr = '0' + dig;
8285 esignbuf[esignlen++] = '0';
8286 esignbuf[esignlen++] = 'b';
8289 default: /* it had better be ten or less */
8290 #if defined(PERL_Y2KWARN)
8291 if (ckWARN(WARN_Y2K)) {
8293 char *s = SvPV(sv,n);
8294 if (n >= 2 && s[n-2] == '1' && s[n-1] == '9'
8295 && (n == 2 || !isDIGIT(s[n-3])))
8297 Perl_warner(aTHX_ packWARN(WARN_Y2K),
8298 "Possible Y2K bug: %%%c %s",
8299 c, "format string following '19'");
8305 *--eptr = '0' + dig;
8306 } while (uv /= base);
8309 elen = (ebuf + sizeof ebuf) - eptr;
8312 zeros = precis - elen;
8313 else if (precis == 0 && elen == 1 && *eptr == '0')
8318 /* FLOATING POINT */
8321 c = 'f'; /* maybe %F isn't supported here */
8327 /* This is evil, but floating point is even more evil */
8330 nv = args ? va_arg(*args, NV) : SvNVx(argsv);
8333 if (c != 'e' && c != 'E') {
8335 (void)Perl_frexp(nv, &i);
8336 if (i == PERL_INT_MIN)
8337 Perl_die(aTHX_ "panic: frexp");
8339 need = BIT_DIGITS(i);
8341 need += has_precis ? precis : 6; /* known default */
8345 need += 20; /* fudge factor */
8346 if (PL_efloatsize < need) {
8347 Safefree(PL_efloatbuf);
8348 PL_efloatsize = need + 20; /* more fudge */
8349 New(906, PL_efloatbuf, PL_efloatsize, char);
8350 PL_efloatbuf[0] = '\0';
8353 eptr = ebuf + sizeof ebuf;
8356 #if defined(USE_LONG_DOUBLE) && defined(PERL_PRIfldbl)
8358 /* Copy the one or more characters in a long double
8359 * format before the 'base' ([efgEFG]) character to
8360 * the format string. */
8361 static char const prifldbl[] = PERL_PRIfldbl;
8362 char const *p = prifldbl + sizeof(prifldbl) - 3;
8363 while (p >= prifldbl) { *--eptr = *p--; }
8368 do { *--eptr = '0' + (base % 10); } while (base /= 10);
8373 do { *--eptr = '0' + (base % 10); } while (base /= 10);
8385 /* No taint. Otherwise we are in the strange situation
8386 * where printf() taints but print($float) doesn't.
8388 (void)sprintf(PL_efloatbuf, eptr, nv);
8390 eptr = PL_efloatbuf;
8391 elen = strlen(PL_efloatbuf);
8398 i = SvCUR(sv) - origlen;
8401 case 'h': *(va_arg(*args, short*)) = i; break;
8402 default: *(va_arg(*args, int*)) = i; break;
8403 case 'l': *(va_arg(*args, long*)) = i; break;
8404 case 'V': *(va_arg(*args, IV*)) = i; break;
8406 case 'q': *(va_arg(*args, Quad_t*)) = i; break;
8411 sv_setuv_mg(argsv, (UV)i);
8412 continue; /* not "break" */
8419 if (!args && ckWARN(WARN_PRINTF) &&
8420 (PL_op->op_type == OP_PRTF || PL_op->op_type == OP_SPRINTF)) {
8421 SV *msg = sv_newmortal();
8422 Perl_sv_setpvf(aTHX_ msg, "Invalid conversion in %s: ",
8423 (PL_op->op_type == OP_PRTF) ? "printf" : "sprintf");
8426 Perl_sv_catpvf(aTHX_ msg,
8427 "\"%%%c\"", c & 0xFF);
8429 Perl_sv_catpvf(aTHX_ msg,
8430 "\"%%\\%03"UVof"\"",
8433 sv_catpv(msg, "end of string");
8434 Perl_warner(aTHX_ packWARN(WARN_PRINTF), "%"SVf, msg); /* yes, this is reentrant */
8437 /* output mangled stuff ... */
8443 /* ... right here, because formatting flags should not apply */
8444 SvGROW(sv, SvCUR(sv) + elen + 1);
8446 Copy(eptr, p, elen, char);
8449 SvCUR(sv) = p - SvPVX(sv);
8450 continue; /* not "break" */
8453 if (is_utf8 != has_utf8) {
8456 sv_utf8_upgrade(sv);
8459 SV *nsv = sv_2mortal(newSVpvn(eptr, elen));
8460 sv_utf8_upgrade(nsv);
8464 SvGROW(sv, SvCUR(sv) + elen + 1);
8469 have = esignlen + zeros + elen;
8470 need = (have > width ? have : width);
8473 SvGROW(sv, SvCUR(sv) + need + dotstrlen + 1);
8475 if (esignlen && fill == '0') {
8476 for (i = 0; i < esignlen; i++)
8480 memset(p, fill, gap);
8483 if (esignlen && fill != '0') {
8484 for (i = 0; i < esignlen; i++)
8488 for (i = zeros; i; i--)
8492 Copy(eptr, p, elen, char);
8496 memset(p, ' ', gap);
8501 Copy(dotstr, p, dotstrlen, char);
8505 vectorize = FALSE; /* done iterating over vecstr */
8512 SvCUR(sv) = p - SvPVX(sv);
8520 /* =========================================================================
8522 =head1 Cloning an interpreter
8524 All the macros and functions in this section are for the private use of
8525 the main function, perl_clone().
8527 The foo_dup() functions make an exact copy of an existing foo thinngy.
8528 During the course of a cloning, a hash table is used to map old addresses
8529 to new addresses. The table is created and manipulated with the
8530 ptr_table_* functions.
8534 ============================================================================*/
8537 #if defined(USE_ITHREADS)
8539 #if defined(USE_5005THREADS)
8540 # include "error: USE_5005THREADS and USE_ITHREADS are incompatible"
8543 #ifndef GpREFCNT_inc
8544 # define GpREFCNT_inc(gp) ((gp) ? (++(gp)->gp_refcnt, (gp)) : (GP*)NULL)
8548 #define sv_dup_inc(s,t) SvREFCNT_inc(sv_dup(s,t))
8549 #define av_dup(s,t) (AV*)sv_dup((SV*)s,t)
8550 #define av_dup_inc(s,t) (AV*)SvREFCNT_inc(sv_dup((SV*)s,t))
8551 #define hv_dup(s,t) (HV*)sv_dup((SV*)s,t)
8552 #define hv_dup_inc(s,t) (HV*)SvREFCNT_inc(sv_dup((SV*)s,t))
8553 #define cv_dup(s,t) (CV*)sv_dup((SV*)s,t)
8554 #define cv_dup_inc(s,t) (CV*)SvREFCNT_inc(sv_dup((SV*)s,t))
8555 #define io_dup(s,t) (IO*)sv_dup((SV*)s,t)
8556 #define io_dup_inc(s,t) (IO*)SvREFCNT_inc(sv_dup((SV*)s,t))
8557 #define gv_dup(s,t) (GV*)sv_dup((SV*)s,t)
8558 #define gv_dup_inc(s,t) (GV*)SvREFCNT_inc(sv_dup((SV*)s,t))
8559 #define SAVEPV(p) (p ? savepv(p) : Nullch)
8560 #define SAVEPVN(p,n) (p ? savepvn(p,n) : Nullch)
8563 /* Duplicate a regexp. Required reading: pregcomp() and pregfree() in
8564 regcomp.c. AMS 20010712 */
8567 Perl_re_dup(pTHX_ REGEXP *r, CLONE_PARAMS *param)
8571 struct reg_substr_datum *s;
8574 return (REGEXP *)NULL;
8576 if ((ret = (REGEXP *)ptr_table_fetch(PL_ptr_table, r)))
8579 len = r->offsets[0];
8580 npar = r->nparens+1;
8582 Newc(0, ret, sizeof(regexp) + (len+1)*sizeof(regnode), char, regexp);
8583 Copy(r->program, ret->program, len+1, regnode);
8585 New(0, ret->startp, npar, I32);
8586 Copy(r->startp, ret->startp, npar, I32);
8587 New(0, ret->endp, npar, I32);
8588 Copy(r->startp, ret->startp, npar, I32);
8590 New(0, ret->substrs, 1, struct reg_substr_data);
8591 for (s = ret->substrs->data, i = 0; i < 3; i++, s++) {
8592 s->min_offset = r->substrs->data[i].min_offset;
8593 s->max_offset = r->substrs->data[i].max_offset;
8594 s->substr = sv_dup_inc(r->substrs->data[i].substr, param);
8595 s->utf8_substr = sv_dup_inc(r->substrs->data[i].utf8_substr, param);
8598 ret->regstclass = NULL;
8601 int count = r->data->count;
8603 Newc(0, d, sizeof(struct reg_data) + count*sizeof(void *),
8604 char, struct reg_data);
8605 New(0, d->what, count, U8);
8608 for (i = 0; i < count; i++) {
8609 d->what[i] = r->data->what[i];
8610 switch (d->what[i]) {
8612 d->data[i] = sv_dup_inc((SV *)r->data->data[i], param);
8615 d->data[i] = av_dup_inc((AV *)r->data->data[i], param);
8618 /* This is cheating. */
8619 New(0, d->data[i], 1, struct regnode_charclass_class);
8620 StructCopy(r->data->data[i], d->data[i],
8621 struct regnode_charclass_class);
8622 ret->regstclass = (regnode*)d->data[i];
8625 /* Compiled op trees are readonly, and can thus be
8626 shared without duplication. */
8627 d->data[i] = (void*)OpREFCNT_inc((OP*)r->data->data[i]);
8630 d->data[i] = r->data->data[i];
8640 New(0, ret->offsets, 2*len+1, U32);
8641 Copy(r->offsets, ret->offsets, 2*len+1, U32);
8643 ret->precomp = SAVEPV(r->precomp);
8644 ret->refcnt = r->refcnt;
8645 ret->minlen = r->minlen;
8646 ret->prelen = r->prelen;
8647 ret->nparens = r->nparens;
8648 ret->lastparen = r->lastparen;
8649 ret->lastcloseparen = r->lastcloseparen;
8650 ret->reganch = r->reganch;
8652 ret->sublen = r->sublen;
8654 if (RX_MATCH_COPIED(ret))
8655 ret->subbeg = SAVEPV(r->subbeg);
8657 ret->subbeg = Nullch;
8659 ptr_table_store(PL_ptr_table, r, ret);
8663 /* duplicate a file handle */
8666 Perl_fp_dup(pTHX_ PerlIO *fp, char type, CLONE_PARAMS *param)
8670 return (PerlIO*)NULL;
8672 /* look for it in the table first */
8673 ret = (PerlIO*)ptr_table_fetch(PL_ptr_table, fp);
8677 /* create anew and remember what it is */
8678 ret = PerlIO_fdupopen(aTHX_ fp, param, PERLIO_DUP_CLONE);
8679 ptr_table_store(PL_ptr_table, fp, ret);
8683 /* duplicate a directory handle */
8686 Perl_dirp_dup(pTHX_ DIR *dp)
8694 /* duplicate a typeglob */
8697 Perl_gp_dup(pTHX_ GP *gp, CLONE_PARAMS* param)
8702 /* look for it in the table first */
8703 ret = (GP*)ptr_table_fetch(PL_ptr_table, gp);
8707 /* create anew and remember what it is */
8708 Newz(0, ret, 1, GP);
8709 ptr_table_store(PL_ptr_table, gp, ret);
8712 ret->gp_refcnt = 0; /* must be before any other dups! */
8713 ret->gp_sv = sv_dup_inc(gp->gp_sv, param);
8714 ret->gp_io = io_dup_inc(gp->gp_io, param);
8715 ret->gp_form = cv_dup_inc(gp->gp_form, param);
8716 ret->gp_av = av_dup_inc(gp->gp_av, param);
8717 ret->gp_hv = hv_dup_inc(gp->gp_hv, param);
8718 ret->gp_egv = gv_dup(gp->gp_egv, param);/* GvEGV is not refcounted */
8719 ret->gp_cv = cv_dup_inc(gp->gp_cv, param);
8720 ret->gp_cvgen = gp->gp_cvgen;
8721 ret->gp_flags = gp->gp_flags;
8722 ret->gp_line = gp->gp_line;
8723 ret->gp_file = gp->gp_file; /* points to COP.cop_file */
8727 /* duplicate a chain of magic */
8730 Perl_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS* param)
8732 MAGIC *mgprev = (MAGIC*)NULL;
8735 return (MAGIC*)NULL;
8736 /* look for it in the table first */
8737 mgret = (MAGIC*)ptr_table_fetch(PL_ptr_table, mg);
8741 for (; mg; mg = mg->mg_moremagic) {
8743 Newz(0, nmg, 1, MAGIC);
8745 mgprev->mg_moremagic = nmg;
8748 nmg->mg_virtual = mg->mg_virtual; /* XXX copy dynamic vtable? */
8749 nmg->mg_private = mg->mg_private;
8750 nmg->mg_type = mg->mg_type;
8751 nmg->mg_flags = mg->mg_flags;
8752 if (mg->mg_type == PERL_MAGIC_qr) {
8753 nmg->mg_obj = (SV*)re_dup((REGEXP*)mg->mg_obj, param);
8755 else if(mg->mg_type == PERL_MAGIC_backref) {
8756 AV *av = (AV*) mg->mg_obj;
8759 nmg->mg_obj = (SV*)newAV();
8763 av_push((AV*)nmg->mg_obj,sv_dup(svp[i],param));
8768 nmg->mg_obj = (mg->mg_flags & MGf_REFCOUNTED)
8769 ? sv_dup_inc(mg->mg_obj, param)
8770 : sv_dup(mg->mg_obj, param);
8772 nmg->mg_len = mg->mg_len;
8773 nmg->mg_ptr = mg->mg_ptr; /* XXX random ptr? */
8774 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
8775 if (mg->mg_len > 0) {
8776 nmg->mg_ptr = SAVEPVN(mg->mg_ptr, mg->mg_len);
8777 if (mg->mg_type == PERL_MAGIC_overload_table &&
8778 AMT_AMAGIC((AMT*)mg->mg_ptr))
8780 AMT *amtp = (AMT*)mg->mg_ptr;
8781 AMT *namtp = (AMT*)nmg->mg_ptr;
8783 for (i = 1; i < NofAMmeth; i++) {
8784 namtp->table[i] = cv_dup_inc(amtp->table[i], param);
8788 else if (mg->mg_len == HEf_SVKEY)
8789 nmg->mg_ptr = (char*)sv_dup_inc((SV*)mg->mg_ptr, param);
8791 if ((mg->mg_flags & MGf_DUP) && mg->mg_virtual && mg->mg_virtual->svt_dup) {
8792 CALL_FPTR(nmg->mg_virtual->svt_dup)(aTHX_ nmg, param);
8799 /* create a new pointer-mapping table */
8802 Perl_ptr_table_new(pTHX)
8805 Newz(0, tbl, 1, PTR_TBL_t);
8808 Newz(0, tbl->tbl_ary, tbl->tbl_max + 1, PTR_TBL_ENT_t*);
8812 /* map an existing pointer using a table */
8815 Perl_ptr_table_fetch(pTHX_ PTR_TBL_t *tbl, void *sv)
8817 PTR_TBL_ENT_t *tblent;
8818 UV hash = PTR2UV(sv);
8820 tblent = tbl->tbl_ary[hash & tbl->tbl_max];
8821 for (; tblent; tblent = tblent->next) {
8822 if (tblent->oldval == sv)
8823 return tblent->newval;
8828 /* add a new entry to a pointer-mapping table */
8831 Perl_ptr_table_store(pTHX_ PTR_TBL_t *tbl, void *oldv, void *newv)
8833 PTR_TBL_ENT_t *tblent, **otblent;
8834 /* XXX this may be pessimal on platforms where pointers aren't good
8835 * hash values e.g. if they grow faster in the most significant
8837 UV hash = PTR2UV(oldv);
8841 otblent = &tbl->tbl_ary[hash & tbl->tbl_max];
8842 for (tblent = *otblent; tblent; i=0, tblent = tblent->next) {
8843 if (tblent->oldval == oldv) {
8844 tblent->newval = newv;
8849 Newz(0, tblent, 1, PTR_TBL_ENT_t);
8850 tblent->oldval = oldv;
8851 tblent->newval = newv;
8852 tblent->next = *otblent;
8855 if (i && tbl->tbl_items > tbl->tbl_max)
8856 ptr_table_split(tbl);
8859 /* double the hash bucket size of an existing ptr table */
8862 Perl_ptr_table_split(pTHX_ PTR_TBL_t *tbl)
8864 PTR_TBL_ENT_t **ary = tbl->tbl_ary;
8865 UV oldsize = tbl->tbl_max + 1;
8866 UV newsize = oldsize * 2;
8869 Renew(ary, newsize, PTR_TBL_ENT_t*);
8870 Zero(&ary[oldsize], newsize-oldsize, PTR_TBL_ENT_t*);
8871 tbl->tbl_max = --newsize;
8873 for (i=0; i < oldsize; i++, ary++) {
8874 PTR_TBL_ENT_t **curentp, **entp, *ent;
8877 curentp = ary + oldsize;
8878 for (entp = ary, ent = *ary; ent; ent = *entp) {
8879 if ((newsize & PTR2UV(ent->oldval)) != i) {
8881 ent->next = *curentp;
8891 /* remove all the entries from a ptr table */
8894 Perl_ptr_table_clear(pTHX_ PTR_TBL_t *tbl)
8896 register PTR_TBL_ENT_t **array;
8897 register PTR_TBL_ENT_t *entry;
8898 register PTR_TBL_ENT_t *oentry = Null(PTR_TBL_ENT_t*);
8902 if (!tbl || !tbl->tbl_items) {
8906 array = tbl->tbl_ary;
8913 entry = entry->next;
8917 if (++riter > max) {
8920 entry = array[riter];
8927 /* clear and free a ptr table */
8930 Perl_ptr_table_free(pTHX_ PTR_TBL_t *tbl)
8935 ptr_table_clear(tbl);
8936 Safefree(tbl->tbl_ary);
8944 /* attempt to make everything in the typeglob readonly */
8947 S_gv_share(pTHX_ SV *sstr)
8950 SV *sv = &PL_sv_no; /* just need SvREADONLY-ness */
8952 if (GvIO(gv) || GvFORM(gv)) {
8953 GvUNIQUE_off(gv); /* GvIOs cannot be shared. nor can GvFORMs */
8955 else if (!GvCV(gv)) {
8959 /* CvPADLISTs cannot be shared */
8960 if (!CvXSUB(GvCV(gv))) {
8965 if (!GvUNIQUE(gv)) {
8967 PerlIO_printf(Perl_debug_log, "gv_share: unable to share %s::%s\n",
8968 HvNAME(GvSTASH(gv)), GvNAME(gv));
8974 * write attempts will die with
8975 * "Modification of a read-only value attempted"
8981 SvREADONLY_on(GvSV(gv));
8988 SvREADONLY_on(GvAV(gv));
8995 SvREADONLY_on(GvAV(gv));
8998 return sstr; /* he_dup() will SvREFCNT_inc() */
9001 /* duplicate an SV of any type (including AV, HV etc) */
9004 Perl_rvpv_dup(pTHX_ SV *dstr, SV *sstr, CLONE_PARAMS* param)
9007 SvRV(dstr) = SvWEAKREF(sstr)
9008 ? sv_dup(SvRV(sstr), param)
9009 : sv_dup_inc(SvRV(sstr), param);
9011 else if (SvPVX(sstr)) {
9012 /* Has something there */
9014 /* Normal PV - clone whole allocated space */
9015 SvPVX(dstr) = SAVEPVN(SvPVX(sstr), SvLEN(sstr)-1);
9018 /* Special case - not normally malloced for some reason */
9019 if (SvREADONLY(sstr) && SvFAKE(sstr)) {
9020 /* A "shared" PV - clone it as unshared string */
9022 SvREADONLY_off(dstr);
9023 SvPVX(dstr) = SAVEPVN(SvPVX(sstr), SvCUR(sstr));
9026 /* Some other special case - random pointer */
9027 SvPVX(dstr) = SvPVX(sstr);
9033 SvPVX(dstr) = SvPVX(sstr);
9038 Perl_sv_dup(pTHX_ SV *sstr, CLONE_PARAMS* param)
9042 if (!sstr || SvTYPE(sstr) == SVTYPEMASK)
9044 /* look for it in the table first */
9045 dstr = (SV*)ptr_table_fetch(PL_ptr_table, sstr);
9049 /* create anew and remember what it is */
9051 ptr_table_store(PL_ptr_table, sstr, dstr);
9054 SvFLAGS(dstr) = SvFLAGS(sstr);
9055 SvFLAGS(dstr) &= ~SVf_OOK; /* don't propagate OOK hack */
9056 SvREFCNT(dstr) = 0; /* must be before any other dups! */
9059 if (SvANY(sstr) && PL_watch_pvx && SvPVX(sstr) == PL_watch_pvx)
9060 PerlIO_printf(Perl_debug_log, "watch at %p hit, found string \"%s\"\n",
9061 PL_watch_pvx, SvPVX(sstr));
9064 switch (SvTYPE(sstr)) {
9069 SvANY(dstr) = new_XIV();
9070 SvIVX(dstr) = SvIVX(sstr);
9073 SvANY(dstr) = new_XNV();
9074 SvNVX(dstr) = SvNVX(sstr);
9077 SvANY(dstr) = new_XRV();
9078 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9081 SvANY(dstr) = new_XPV();
9082 SvCUR(dstr) = SvCUR(sstr);
9083 SvLEN(dstr) = SvLEN(sstr);
9084 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9087 SvANY(dstr) = new_XPVIV();
9088 SvCUR(dstr) = SvCUR(sstr);
9089 SvLEN(dstr) = SvLEN(sstr);
9090 SvIVX(dstr) = SvIVX(sstr);
9091 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9094 SvANY(dstr) = new_XPVNV();
9095 SvCUR(dstr) = SvCUR(sstr);
9096 SvLEN(dstr) = SvLEN(sstr);
9097 SvIVX(dstr) = SvIVX(sstr);
9098 SvNVX(dstr) = SvNVX(sstr);
9099 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9102 SvANY(dstr) = new_XPVMG();
9103 SvCUR(dstr) = SvCUR(sstr);
9104 SvLEN(dstr) = SvLEN(sstr);
9105 SvIVX(dstr) = SvIVX(sstr);
9106 SvNVX(dstr) = SvNVX(sstr);
9107 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9108 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9109 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9112 SvANY(dstr) = new_XPVBM();
9113 SvCUR(dstr) = SvCUR(sstr);
9114 SvLEN(dstr) = SvLEN(sstr);
9115 SvIVX(dstr) = SvIVX(sstr);
9116 SvNVX(dstr) = SvNVX(sstr);
9117 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9118 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9119 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9120 BmRARE(dstr) = BmRARE(sstr);
9121 BmUSEFUL(dstr) = BmUSEFUL(sstr);
9122 BmPREVIOUS(dstr)= BmPREVIOUS(sstr);
9125 SvANY(dstr) = new_XPVLV();
9126 SvCUR(dstr) = SvCUR(sstr);
9127 SvLEN(dstr) = SvLEN(sstr);
9128 SvIVX(dstr) = SvIVX(sstr);
9129 SvNVX(dstr) = SvNVX(sstr);
9130 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9131 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9132 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9133 LvTARGOFF(dstr) = LvTARGOFF(sstr); /* XXX sometimes holds PMOP* when DEBUGGING */
9134 LvTARGLEN(dstr) = LvTARGLEN(sstr);
9135 LvTARG(dstr) = sv_dup_inc(LvTARG(sstr), param);
9136 LvTYPE(dstr) = LvTYPE(sstr);
9139 if (GvUNIQUE((GV*)sstr)) {
9141 if ((share = gv_share(sstr))) {
9145 PerlIO_printf(Perl_debug_log, "sv_dup: sharing %s::%s\n",
9146 HvNAME(GvSTASH(share)), GvNAME(share));
9151 SvANY(dstr) = new_XPVGV();
9152 SvCUR(dstr) = SvCUR(sstr);
9153 SvLEN(dstr) = SvLEN(sstr);
9154 SvIVX(dstr) = SvIVX(sstr);
9155 SvNVX(dstr) = SvNVX(sstr);
9156 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9157 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9158 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9159 GvNAMELEN(dstr) = GvNAMELEN(sstr);
9160 GvNAME(dstr) = SAVEPVN(GvNAME(sstr), GvNAMELEN(sstr));
9161 GvSTASH(dstr) = hv_dup_inc(GvSTASH(sstr), param);
9162 GvFLAGS(dstr) = GvFLAGS(sstr);
9163 GvGP(dstr) = gp_dup(GvGP(sstr), param);
9164 (void)GpREFCNT_inc(GvGP(dstr));
9167 SvANY(dstr) = new_XPVIO();
9168 SvCUR(dstr) = SvCUR(sstr);
9169 SvLEN(dstr) = SvLEN(sstr);
9170 SvIVX(dstr) = SvIVX(sstr);
9171 SvNVX(dstr) = SvNVX(sstr);
9172 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9173 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9174 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9175 IoIFP(dstr) = fp_dup(IoIFP(sstr), IoTYPE(sstr), param);
9176 if (IoOFP(sstr) == IoIFP(sstr))
9177 IoOFP(dstr) = IoIFP(dstr);
9179 IoOFP(dstr) = fp_dup(IoOFP(sstr), IoTYPE(sstr), param);
9180 /* PL_rsfp_filters entries have fake IoDIRP() */
9181 if (IoDIRP(sstr) && !(IoFLAGS(sstr) & IOf_FAKE_DIRP))
9182 IoDIRP(dstr) = dirp_dup(IoDIRP(sstr));
9184 IoDIRP(dstr) = IoDIRP(sstr);
9185 IoLINES(dstr) = IoLINES(sstr);
9186 IoPAGE(dstr) = IoPAGE(sstr);
9187 IoPAGE_LEN(dstr) = IoPAGE_LEN(sstr);
9188 IoLINES_LEFT(dstr) = IoLINES_LEFT(sstr);
9189 IoTOP_NAME(dstr) = SAVEPV(IoTOP_NAME(sstr));
9190 IoTOP_GV(dstr) = gv_dup(IoTOP_GV(sstr), param);
9191 IoFMT_NAME(dstr) = SAVEPV(IoFMT_NAME(sstr));
9192 IoFMT_GV(dstr) = gv_dup(IoFMT_GV(sstr), param);
9193 IoBOTTOM_NAME(dstr) = SAVEPV(IoBOTTOM_NAME(sstr));
9194 IoBOTTOM_GV(dstr) = gv_dup(IoBOTTOM_GV(sstr), param);
9195 IoSUBPROCESS(dstr) = IoSUBPROCESS(sstr);
9196 IoTYPE(dstr) = IoTYPE(sstr);
9197 IoFLAGS(dstr) = IoFLAGS(sstr);
9200 SvANY(dstr) = new_XPVAV();
9201 SvCUR(dstr) = SvCUR(sstr);
9202 SvLEN(dstr) = SvLEN(sstr);
9203 SvIVX(dstr) = SvIVX(sstr);
9204 SvNVX(dstr) = SvNVX(sstr);
9205 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9206 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9207 AvARYLEN((AV*)dstr) = sv_dup_inc(AvARYLEN((AV*)sstr), param);
9208 AvFLAGS((AV*)dstr) = AvFLAGS((AV*)sstr);
9209 if (AvARRAY((AV*)sstr)) {
9210 SV **dst_ary, **src_ary;
9211 SSize_t items = AvFILLp((AV*)sstr) + 1;
9213 src_ary = AvARRAY((AV*)sstr);
9214 Newz(0, dst_ary, AvMAX((AV*)sstr)+1, SV*);
9215 ptr_table_store(PL_ptr_table, src_ary, dst_ary);
9216 SvPVX(dstr) = (char*)dst_ary;
9217 AvALLOC((AV*)dstr) = dst_ary;
9218 if (AvREAL((AV*)sstr)) {
9220 *dst_ary++ = sv_dup_inc(*src_ary++, param);
9224 *dst_ary++ = sv_dup(*src_ary++, param);
9226 items = AvMAX((AV*)sstr) - AvFILLp((AV*)sstr);
9227 while (items-- > 0) {
9228 *dst_ary++ = &PL_sv_undef;
9232 SvPVX(dstr) = Nullch;
9233 AvALLOC((AV*)dstr) = (SV**)NULL;
9237 SvANY(dstr) = new_XPVHV();
9238 SvCUR(dstr) = SvCUR(sstr);
9239 SvLEN(dstr) = SvLEN(sstr);
9240 SvIVX(dstr) = SvIVX(sstr);
9241 SvNVX(dstr) = SvNVX(sstr);
9242 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9243 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9244 HvRITER((HV*)dstr) = HvRITER((HV*)sstr);
9245 if (HvARRAY((HV*)sstr)) {
9247 XPVHV *dxhv = (XPVHV*)SvANY(dstr);
9248 XPVHV *sxhv = (XPVHV*)SvANY(sstr);
9249 Newz(0, dxhv->xhv_array,
9250 PERL_HV_ARRAY_ALLOC_BYTES(dxhv->xhv_max+1), char);
9251 while (i <= sxhv->xhv_max) {
9252 ((HE**)dxhv->xhv_array)[i] = he_dup(((HE**)sxhv->xhv_array)[i],
9253 !!HvSHAREKEYS(sstr), param);
9256 dxhv->xhv_eiter = he_dup(sxhv->xhv_eiter, !!HvSHAREKEYS(sstr), param);
9259 SvPVX(dstr) = Nullch;
9260 HvEITER((HV*)dstr) = (HE*)NULL;
9262 HvPMROOT((HV*)dstr) = HvPMROOT((HV*)sstr); /* XXX */
9263 HvNAME((HV*)dstr) = SAVEPV(HvNAME((HV*)sstr));
9264 /* Record stashes for possible cloning in Perl_clone(). */
9265 if(HvNAME((HV*)dstr))
9266 av_push(param->stashes, dstr);
9269 SvANY(dstr) = new_XPVFM();
9270 FmLINES(dstr) = FmLINES(sstr);
9274 SvANY(dstr) = new_XPVCV();
9276 SvCUR(dstr) = SvCUR(sstr);
9277 SvLEN(dstr) = SvLEN(sstr);
9278 SvIVX(dstr) = SvIVX(sstr);
9279 SvNVX(dstr) = SvNVX(sstr);
9280 SvMAGIC(dstr) = mg_dup(SvMAGIC(sstr), param);
9281 SvSTASH(dstr) = hv_dup_inc(SvSTASH(sstr), param);
9282 Perl_rvpv_dup(aTHX_ dstr, sstr, param);
9283 CvSTASH(dstr) = hv_dup(CvSTASH(sstr), param); /* NOTE: not refcounted */
9284 CvSTART(dstr) = CvSTART(sstr);
9285 CvROOT(dstr) = OpREFCNT_inc(CvROOT(sstr));
9286 CvXSUB(dstr) = CvXSUB(sstr);
9287 CvXSUBANY(dstr) = CvXSUBANY(sstr);
9288 if (CvCONST(sstr)) {
9289 CvXSUBANY(dstr).any_ptr = GvUNIQUE(CvGV(sstr)) ?
9290 SvREFCNT_inc(CvXSUBANY(sstr).any_ptr) :
9291 sv_dup_inc(CvXSUBANY(sstr).any_ptr, param);
9293 CvGV(dstr) = gv_dup(CvGV(sstr), param);
9294 if (param->flags & CLONEf_COPY_STACKS) {
9295 CvDEPTH(dstr) = CvDEPTH(sstr);
9299 if (CvPADLIST(sstr) && !AvREAL(CvPADLIST(sstr))) {
9300 /* XXX padlists are real, but pretend to be not */
9301 AvREAL_on(CvPADLIST(sstr));
9302 CvPADLIST(dstr) = av_dup_inc(CvPADLIST(sstr), param);
9303 AvREAL_off(CvPADLIST(sstr));
9304 AvREAL_off(CvPADLIST(dstr));
9307 CvPADLIST(dstr) = av_dup_inc(CvPADLIST(sstr), param);
9308 if (!CvANON(sstr) || CvCLONED(sstr))
9309 CvOUTSIDE(dstr) = cv_dup_inc(CvOUTSIDE(sstr), param);
9311 CvOUTSIDE(dstr) = cv_dup(CvOUTSIDE(sstr), param);
9312 CvFLAGS(dstr) = CvFLAGS(sstr);
9313 CvFILE(dstr) = CvXSUB(sstr) ? CvFILE(sstr) : SAVEPV(CvFILE(sstr));
9316 Perl_croak(aTHX_ "Bizarre SvTYPE [%d]", SvTYPE(sstr));
9320 if (SvOBJECT(dstr) && SvTYPE(dstr) != SVt_PVIO)
9326 /* duplicate a context */
9329 Perl_cx_dup(pTHX_ PERL_CONTEXT *cxs, I32 ix, I32 max, CLONE_PARAMS* param)
9334 return (PERL_CONTEXT*)NULL;
9336 /* look for it in the table first */
9337 ncxs = (PERL_CONTEXT*)ptr_table_fetch(PL_ptr_table, cxs);
9341 /* create anew and remember what it is */
9342 Newz(56, ncxs, max + 1, PERL_CONTEXT);
9343 ptr_table_store(PL_ptr_table, cxs, ncxs);
9346 PERL_CONTEXT *cx = &cxs[ix];
9347 PERL_CONTEXT *ncx = &ncxs[ix];
9348 ncx->cx_type = cx->cx_type;
9349 if (CxTYPE(cx) == CXt_SUBST) {
9350 Perl_croak(aTHX_ "Cloning substitution context is unimplemented");
9353 ncx->blk_oldsp = cx->blk_oldsp;
9354 ncx->blk_oldcop = cx->blk_oldcop;
9355 ncx->blk_oldretsp = cx->blk_oldretsp;
9356 ncx->blk_oldmarksp = cx->blk_oldmarksp;
9357 ncx->blk_oldscopesp = cx->blk_oldscopesp;
9358 ncx->blk_oldpm = cx->blk_oldpm;
9359 ncx->blk_gimme = cx->blk_gimme;
9360 switch (CxTYPE(cx)) {
9362 ncx->blk_sub.cv = (cx->blk_sub.olddepth == 0
9363 ? cv_dup_inc(cx->blk_sub.cv, param)
9364 : cv_dup(cx->blk_sub.cv,param));
9365 ncx->blk_sub.argarray = (cx->blk_sub.hasargs
9366 ? av_dup_inc(cx->blk_sub.argarray, param)
9368 ncx->blk_sub.savearray = av_dup_inc(cx->blk_sub.savearray, param);
9369 ncx->blk_sub.olddepth = cx->blk_sub.olddepth;
9370 ncx->blk_sub.hasargs = cx->blk_sub.hasargs;
9371 ncx->blk_sub.lval = cx->blk_sub.lval;
9374 ncx->blk_eval.old_in_eval = cx->blk_eval.old_in_eval;
9375 ncx->blk_eval.old_op_type = cx->blk_eval.old_op_type;
9376 ncx->blk_eval.old_namesv = sv_dup_inc(cx->blk_eval.old_namesv, param);;
9377 ncx->blk_eval.old_eval_root = cx->blk_eval.old_eval_root;
9378 ncx->blk_eval.cur_text = sv_dup(cx->blk_eval.cur_text, param);
9381 ncx->blk_loop.label = cx->blk_loop.label;
9382 ncx->blk_loop.resetsp = cx->blk_loop.resetsp;
9383 ncx->blk_loop.redo_op = cx->blk_loop.redo_op;
9384 ncx->blk_loop.next_op = cx->blk_loop.next_op;
9385 ncx->blk_loop.last_op = cx->blk_loop.last_op;
9386 ncx->blk_loop.iterdata = (CxPADLOOP(cx)
9387 ? cx->blk_loop.iterdata
9388 : gv_dup((GV*)cx->blk_loop.iterdata, param));
9389 ncx->blk_loop.oldcurpad
9390 = (SV**)ptr_table_fetch(PL_ptr_table,
9391 cx->blk_loop.oldcurpad);
9392 ncx->blk_loop.itersave = sv_dup_inc(cx->blk_loop.itersave, param);
9393 ncx->blk_loop.iterlval = sv_dup_inc(cx->blk_loop.iterlval, param);
9394 ncx->blk_loop.iterary = av_dup_inc(cx->blk_loop.iterary, param);
9395 ncx->blk_loop.iterix = cx->blk_loop.iterix;
9396 ncx->blk_loop.itermax = cx->blk_loop.itermax;
9399 ncx->blk_sub.cv = cv_dup(cx->blk_sub.cv, param);
9400 ncx->blk_sub.gv = gv_dup(cx->blk_sub.gv, param);
9401 ncx->blk_sub.dfoutgv = gv_dup_inc(cx->blk_sub.dfoutgv, param);
9402 ncx->blk_sub.hasargs = cx->blk_sub.hasargs;
9414 /* duplicate a stack info structure */
9417 Perl_si_dup(pTHX_ PERL_SI *si, CLONE_PARAMS* param)
9422 return (PERL_SI*)NULL;
9424 /* look for it in the table first */
9425 nsi = (PERL_SI*)ptr_table_fetch(PL_ptr_table, si);
9429 /* create anew and remember what it is */
9430 Newz(56, nsi, 1, PERL_SI);
9431 ptr_table_store(PL_ptr_table, si, nsi);
9433 nsi->si_stack = av_dup_inc(si->si_stack, param);
9434 nsi->si_cxix = si->si_cxix;
9435 nsi->si_cxmax = si->si_cxmax;
9436 nsi->si_cxstack = cx_dup(si->si_cxstack, si->si_cxix, si->si_cxmax, param);
9437 nsi->si_type = si->si_type;
9438 nsi->si_prev = si_dup(si->si_prev, param);
9439 nsi->si_next = si_dup(si->si_next, param);
9440 nsi->si_markoff = si->si_markoff;
9445 #define POPINT(ss,ix) ((ss)[--(ix)].any_i32)
9446 #define TOPINT(ss,ix) ((ss)[ix].any_i32)
9447 #define POPLONG(ss,ix) ((ss)[--(ix)].any_long)
9448 #define TOPLONG(ss,ix) ((ss)[ix].any_long)
9449 #define POPIV(ss,ix) ((ss)[--(ix)].any_iv)
9450 #define TOPIV(ss,ix) ((ss)[ix].any_iv)
9451 #define POPPTR(ss,ix) ((ss)[--(ix)].any_ptr)
9452 #define TOPPTR(ss,ix) ((ss)[ix].any_ptr)
9453 #define POPDPTR(ss,ix) ((ss)[--(ix)].any_dptr)
9454 #define TOPDPTR(ss,ix) ((ss)[ix].any_dptr)
9455 #define POPDXPTR(ss,ix) ((ss)[--(ix)].any_dxptr)
9456 #define TOPDXPTR(ss,ix) ((ss)[ix].any_dxptr)
9459 #define pv_dup_inc(p) SAVEPV(p)
9460 #define pv_dup(p) SAVEPV(p)
9461 #define svp_dup_inc(p,pp) any_dup(p,pp)
9463 /* map any object to the new equivent - either something in the
9464 * ptr table, or something in the interpreter structure
9468 Perl_any_dup(pTHX_ void *v, PerlInterpreter *proto_perl)
9475 /* look for it in the table first */
9476 ret = ptr_table_fetch(PL_ptr_table, v);
9480 /* see if it is part of the interpreter structure */
9481 if (v >= (void*)proto_perl && v < (void*)(proto_perl+1))
9482 ret = (void*)(((char*)aTHX) + (((char*)v) - (char*)proto_perl));
9490 /* duplicate the save stack */
9493 Perl_ss_dup(pTHX_ PerlInterpreter *proto_perl, CLONE_PARAMS* param)
9495 ANY *ss = proto_perl->Tsavestack;
9496 I32 ix = proto_perl->Tsavestack_ix;
9497 I32 max = proto_perl->Tsavestack_max;
9510 void (*dptr) (void*);
9511 void (*dxptr) (pTHX_ void*);
9514 Newz(54, nss, max, ANY);
9520 case SAVEt_ITEM: /* normal string */
9521 sv = (SV*)POPPTR(ss,ix);
9522 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9523 sv = (SV*)POPPTR(ss,ix);
9524 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9526 case SAVEt_SV: /* scalar reference */
9527 sv = (SV*)POPPTR(ss,ix);
9528 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9529 gv = (GV*)POPPTR(ss,ix);
9530 TOPPTR(nss,ix) = gv_dup_inc(gv, param);
9532 case SAVEt_GENERIC_PVREF: /* generic char* */
9533 c = (char*)POPPTR(ss,ix);
9534 TOPPTR(nss,ix) = pv_dup(c);
9535 ptr = POPPTR(ss,ix);
9536 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9538 case SAVEt_SHARED_PVREF: /* char* in shared space */
9539 c = (char*)POPPTR(ss,ix);
9540 TOPPTR(nss,ix) = savesharedpv(c);
9541 ptr = POPPTR(ss,ix);
9542 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9544 case SAVEt_GENERIC_SVREF: /* generic sv */
9545 case SAVEt_SVREF: /* scalar reference */
9546 sv = (SV*)POPPTR(ss,ix);
9547 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9548 ptr = POPPTR(ss,ix);
9549 TOPPTR(nss,ix) = svp_dup_inc((SV**)ptr, proto_perl);/* XXXXX */
9551 case SAVEt_AV: /* array reference */
9552 av = (AV*)POPPTR(ss,ix);
9553 TOPPTR(nss,ix) = av_dup_inc(av, param);
9554 gv = (GV*)POPPTR(ss,ix);
9555 TOPPTR(nss,ix) = gv_dup(gv, param);
9557 case SAVEt_HV: /* hash reference */
9558 hv = (HV*)POPPTR(ss,ix);
9559 TOPPTR(nss,ix) = hv_dup_inc(hv, param);
9560 gv = (GV*)POPPTR(ss,ix);
9561 TOPPTR(nss,ix) = gv_dup(gv, param);
9563 case SAVEt_INT: /* int reference */
9564 ptr = POPPTR(ss,ix);
9565 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9566 intval = (int)POPINT(ss,ix);
9567 TOPINT(nss,ix) = intval;
9569 case SAVEt_LONG: /* long reference */
9570 ptr = POPPTR(ss,ix);
9571 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9572 longval = (long)POPLONG(ss,ix);
9573 TOPLONG(nss,ix) = longval;
9575 case SAVEt_I32: /* I32 reference */
9576 case SAVEt_I16: /* I16 reference */
9577 case SAVEt_I8: /* I8 reference */
9578 ptr = POPPTR(ss,ix);
9579 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9583 case SAVEt_IV: /* IV reference */
9584 ptr = POPPTR(ss,ix);
9585 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9589 case SAVEt_SPTR: /* SV* reference */
9590 ptr = POPPTR(ss,ix);
9591 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9592 sv = (SV*)POPPTR(ss,ix);
9593 TOPPTR(nss,ix) = sv_dup(sv, param);
9595 case SAVEt_VPTR: /* random* reference */
9596 ptr = POPPTR(ss,ix);
9597 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9598 ptr = POPPTR(ss,ix);
9599 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9601 case SAVEt_PPTR: /* char* reference */
9602 ptr = POPPTR(ss,ix);
9603 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9604 c = (char*)POPPTR(ss,ix);
9605 TOPPTR(nss,ix) = pv_dup(c);
9607 case SAVEt_HPTR: /* HV* reference */
9608 ptr = POPPTR(ss,ix);
9609 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9610 hv = (HV*)POPPTR(ss,ix);
9611 TOPPTR(nss,ix) = hv_dup(hv, param);
9613 case SAVEt_APTR: /* AV* reference */
9614 ptr = POPPTR(ss,ix);
9615 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9616 av = (AV*)POPPTR(ss,ix);
9617 TOPPTR(nss,ix) = av_dup(av, param);
9620 gv = (GV*)POPPTR(ss,ix);
9621 TOPPTR(nss,ix) = gv_dup(gv, param);
9623 case SAVEt_GP: /* scalar reference */
9624 gp = (GP*)POPPTR(ss,ix);
9625 TOPPTR(nss,ix) = gp = gp_dup(gp, param);
9626 (void)GpREFCNT_inc(gp);
9627 gv = (GV*)POPPTR(ss,ix);
9628 TOPPTR(nss,ix) = gv_dup_inc(gv, param);
9629 c = (char*)POPPTR(ss,ix);
9630 TOPPTR(nss,ix) = pv_dup(c);
9637 case SAVEt_MORTALIZESV:
9638 sv = (SV*)POPPTR(ss,ix);
9639 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9642 ptr = POPPTR(ss,ix);
9643 if (ptr && (((OP*)ptr)->op_private & OPpREFCOUNTED)) {
9644 /* these are assumed to be refcounted properly */
9645 switch (((OP*)ptr)->op_type) {
9652 TOPPTR(nss,ix) = ptr;
9657 TOPPTR(nss,ix) = Nullop;
9662 TOPPTR(nss,ix) = Nullop;
9665 c = (char*)POPPTR(ss,ix);
9666 TOPPTR(nss,ix) = pv_dup_inc(c);
9669 longval = POPLONG(ss,ix);
9670 TOPLONG(nss,ix) = longval;
9673 hv = (HV*)POPPTR(ss,ix);
9674 TOPPTR(nss,ix) = hv_dup_inc(hv, param);
9675 c = (char*)POPPTR(ss,ix);
9676 TOPPTR(nss,ix) = pv_dup_inc(c);
9680 case SAVEt_DESTRUCTOR:
9681 ptr = POPPTR(ss,ix);
9682 TOPPTR(nss,ix) = any_dup(ptr, proto_perl); /* XXX quite arbitrary */
9683 dptr = POPDPTR(ss,ix);
9684 TOPDPTR(nss,ix) = (void (*)(void*))any_dup((void *)dptr, proto_perl);
9686 case SAVEt_DESTRUCTOR_X:
9687 ptr = POPPTR(ss,ix);
9688 TOPPTR(nss,ix) = any_dup(ptr, proto_perl); /* XXX quite arbitrary */
9689 dxptr = POPDXPTR(ss,ix);
9690 TOPDXPTR(nss,ix) = (void (*)(pTHX_ void*))any_dup((void *)dxptr, proto_perl);
9692 case SAVEt_REGCONTEXT:
9698 case SAVEt_STACK_POS: /* Position on Perl stack */
9702 case SAVEt_AELEM: /* array element */
9703 sv = (SV*)POPPTR(ss,ix);
9704 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9707 av = (AV*)POPPTR(ss,ix);
9708 TOPPTR(nss,ix) = av_dup_inc(av, param);
9710 case SAVEt_HELEM: /* hash element */
9711 sv = (SV*)POPPTR(ss,ix);
9712 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9713 sv = (SV*)POPPTR(ss,ix);
9714 TOPPTR(nss,ix) = sv_dup_inc(sv, param);
9715 hv = (HV*)POPPTR(ss,ix);
9716 TOPPTR(nss,ix) = hv_dup_inc(hv, param);
9719 ptr = POPPTR(ss,ix);
9720 TOPPTR(nss,ix) = ptr;
9727 av = (AV*)POPPTR(ss,ix);
9728 TOPPTR(nss,ix) = av_dup(av, param);
9731 longval = (long)POPLONG(ss,ix);
9732 TOPLONG(nss,ix) = longval;
9733 ptr = POPPTR(ss,ix);
9734 TOPPTR(nss,ix) = any_dup(ptr, proto_perl);
9735 sv = (SV*)POPPTR(ss,ix);
9736 TOPPTR(nss,ix) = sv_dup(sv, param);
9739 Perl_croak(aTHX_ "panic: ss_dup inconsistency");
9747 =for apidoc perl_clone
9749 Create and return a new interpreter by cloning the current one.
9754 /* XXX the above needs expanding by someone who actually understands it ! */
9755 EXTERN_C PerlInterpreter *
9756 perl_clone_host(PerlInterpreter* proto_perl, UV flags);
9759 perl_clone(PerlInterpreter *proto_perl, UV flags)
9761 #ifdef PERL_IMPLICIT_SYS
9763 /* perlhost.h so we need to call into it
9764 to clone the host, CPerlHost should have a c interface, sky */
9766 if (flags & CLONEf_CLONE_HOST) {
9767 return perl_clone_host(proto_perl,flags);
9769 return perl_clone_using(proto_perl, flags,
9771 proto_perl->IMemShared,
9772 proto_perl->IMemParse,
9782 perl_clone_using(PerlInterpreter *proto_perl, UV flags,
9783 struct IPerlMem* ipM, struct IPerlMem* ipMS,
9784 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
9785 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
9786 struct IPerlDir* ipD, struct IPerlSock* ipS,
9787 struct IPerlProc* ipP)
9789 /* XXX many of the string copies here can be optimized if they're
9790 * constants; they need to be allocated as common memory and just
9791 * their pointers copied. */
9794 CLONE_PARAMS clone_params;
9795 CLONE_PARAMS* param = &clone_params;
9797 PerlInterpreter *my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
9798 PERL_SET_THX(my_perl);
9801 memset(my_perl, 0xab, sizeof(PerlInterpreter));
9807 Zero(&PL_debug_pad, 1, struct perl_debug_pad);
9808 # else /* !DEBUGGING */
9809 Zero(my_perl, 1, PerlInterpreter);
9810 # endif /* DEBUGGING */
9814 PL_MemShared = ipMS;
9822 #else /* !PERL_IMPLICIT_SYS */
9824 CLONE_PARAMS clone_params;
9825 CLONE_PARAMS* param = &clone_params;
9826 PerlInterpreter *my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
9827 PERL_SET_THX(my_perl);
9832 memset(my_perl, 0xab, sizeof(PerlInterpreter));
9838 Zero(&PL_debug_pad, 1, struct perl_debug_pad);
9839 # else /* !DEBUGGING */
9840 Zero(my_perl, 1, PerlInterpreter);
9841 # endif /* DEBUGGING */
9842 #endif /* PERL_IMPLICIT_SYS */
9843 param->flags = flags;
9846 PL_xiv_arenaroot = NULL;
9848 PL_xnv_arenaroot = NULL;
9850 PL_xrv_arenaroot = NULL;
9852 PL_xpv_arenaroot = NULL;
9854 PL_xpviv_arenaroot = NULL;
9855 PL_xpviv_root = NULL;
9856 PL_xpvnv_arenaroot = NULL;
9857 PL_xpvnv_root = NULL;
9858 PL_xpvcv_arenaroot = NULL;
9859 PL_xpvcv_root = NULL;
9860 PL_xpvav_arenaroot = NULL;
9861 PL_xpvav_root = NULL;
9862 PL_xpvhv_arenaroot = NULL;
9863 PL_xpvhv_root = NULL;
9864 PL_xpvmg_arenaroot = NULL;
9865 PL_xpvmg_root = NULL;
9866 PL_xpvlv_arenaroot = NULL;
9867 PL_xpvlv_root = NULL;
9868 PL_xpvbm_arenaroot = NULL;
9869 PL_xpvbm_root = NULL;
9870 PL_he_arenaroot = NULL;
9872 PL_nice_chunk = NULL;
9873 PL_nice_chunk_size = 0;
9876 PL_sv_root = Nullsv;
9877 PL_sv_arenaroot = Nullsv;
9879 PL_debug = proto_perl->Idebug;
9881 #ifdef USE_REENTRANT_API
9882 Perl_reentrant_init(aTHX);
9885 /* create SV map for pointer relocation */
9886 PL_ptr_table = ptr_table_new();
9888 /* initialize these special pointers as early as possible */
9889 SvANY(&PL_sv_undef) = NULL;
9890 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
9891 SvFLAGS(&PL_sv_undef) = SVf_READONLY|SVt_NULL;
9892 ptr_table_store(PL_ptr_table, &proto_perl->Isv_undef, &PL_sv_undef);
9894 SvANY(&PL_sv_no) = new_XPVNV();
9895 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
9896 SvFLAGS(&PL_sv_no) = SVp_NOK|SVf_NOK|SVp_POK|SVf_POK|SVf_READONLY|SVt_PVNV;
9897 SvPVX(&PL_sv_no) = SAVEPVN(PL_No, 0);
9898 SvCUR(&PL_sv_no) = 0;
9899 SvLEN(&PL_sv_no) = 1;
9900 SvNVX(&PL_sv_no) = 0;
9901 ptr_table_store(PL_ptr_table, &proto_perl->Isv_no, &PL_sv_no);
9903 SvANY(&PL_sv_yes) = new_XPVNV();
9904 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
9905 SvFLAGS(&PL_sv_yes) = SVp_NOK|SVf_NOK|SVp_POK|SVf_POK|SVf_READONLY|SVt_PVNV;
9906 SvPVX(&PL_sv_yes) = SAVEPVN(PL_Yes, 1);
9907 SvCUR(&PL_sv_yes) = 1;
9908 SvLEN(&PL_sv_yes) = 2;
9909 SvNVX(&PL_sv_yes) = 1;
9910 ptr_table_store(PL_ptr_table, &proto_perl->Isv_yes, &PL_sv_yes);
9912 /* create (a non-shared!) shared string table */
9913 PL_strtab = newHV();
9914 HvSHAREKEYS_off(PL_strtab);
9915 hv_ksplit(PL_strtab, 512);
9916 ptr_table_store(PL_ptr_table, proto_perl->Istrtab, PL_strtab);
9918 PL_compiling = proto_perl->Icompiling;
9920 /* These two PVs will be free'd special way so must set them same way op.c does */
9921 PL_compiling.cop_stashpv = savesharedpv(PL_compiling.cop_stashpv);
9922 ptr_table_store(PL_ptr_table, proto_perl->Icompiling.cop_stashpv, PL_compiling.cop_stashpv);
9924 PL_compiling.cop_file = savesharedpv(PL_compiling.cop_file);
9925 ptr_table_store(PL_ptr_table, proto_perl->Icompiling.cop_file, PL_compiling.cop_file);
9927 ptr_table_store(PL_ptr_table, &proto_perl->Icompiling, &PL_compiling);
9928 if (!specialWARN(PL_compiling.cop_warnings))
9929 PL_compiling.cop_warnings = sv_dup_inc(PL_compiling.cop_warnings, param);
9930 if (!specialCopIO(PL_compiling.cop_io))
9931 PL_compiling.cop_io = sv_dup_inc(PL_compiling.cop_io, param);
9932 PL_curcop = (COP*)any_dup(proto_perl->Tcurcop, proto_perl);
9934 /* pseudo environmental stuff */
9935 PL_origargc = proto_perl->Iorigargc;
9937 New(0, PL_origargv, i+1, char*);
9938 PL_origargv[i] = '\0';
9940 PL_origargv[i] = SAVEPV(proto_perl->Iorigargv[i]);
9943 param->stashes = newAV(); /* Setup array of objects to call clone on */
9945 #ifdef PERLIO_LAYERS
9946 /* Clone PerlIO tables as soon as we can handle general xx_dup() */
9947 PerlIO_clone(aTHX_ proto_perl, param);
9950 PL_envgv = gv_dup(proto_perl->Ienvgv, param);
9951 PL_incgv = gv_dup(proto_perl->Iincgv, param);
9952 PL_hintgv = gv_dup(proto_perl->Ihintgv, param);
9953 PL_origfilename = SAVEPV(proto_perl->Iorigfilename);
9954 PL_diehook = sv_dup_inc(proto_perl->Idiehook, param);
9955 PL_warnhook = sv_dup_inc(proto_perl->Iwarnhook, param);
9958 PL_minus_c = proto_perl->Iminus_c;
9959 PL_patchlevel = sv_dup_inc(proto_perl->Ipatchlevel, param);
9960 PL_localpatches = proto_perl->Ilocalpatches;
9961 PL_splitstr = proto_perl->Isplitstr;
9962 PL_preprocess = proto_perl->Ipreprocess;
9963 PL_minus_n = proto_perl->Iminus_n;
9964 PL_minus_p = proto_perl->Iminus_p;
9965 PL_minus_l = proto_perl->Iminus_l;
9966 PL_minus_a = proto_perl->Iminus_a;
9967 PL_minus_F = proto_perl->Iminus_F;
9968 PL_doswitches = proto_perl->Idoswitches;
9969 PL_dowarn = proto_perl->Idowarn;
9970 PL_doextract = proto_perl->Idoextract;
9971 PL_sawampersand = proto_perl->Isawampersand;
9972 PL_unsafe = proto_perl->Iunsafe;
9973 PL_inplace = SAVEPV(proto_perl->Iinplace);
9974 PL_e_script = sv_dup_inc(proto_perl->Ie_script, param);
9975 PL_perldb = proto_perl->Iperldb;
9976 PL_perl_destruct_level = proto_perl->Iperl_destruct_level;
9977 PL_exit_flags = proto_perl->Iexit_flags;
9979 /* magical thingies */
9980 /* XXX time(&PL_basetime) when asked for? */
9981 PL_basetime = proto_perl->Ibasetime;
9982 PL_formfeed = sv_dup(proto_perl->Iformfeed, param);
9984 PL_maxsysfd = proto_perl->Imaxsysfd;
9985 PL_multiline = proto_perl->Imultiline;
9986 PL_statusvalue = proto_perl->Istatusvalue;
9988 PL_statusvalue_vms = proto_perl->Istatusvalue_vms;
9990 PL_encoding = sv_dup(proto_perl->Iencoding, param);
9993 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
9994 sv_setpvn(PERL_DEBUG_PAD(1), "", 0);
9995 sv_setpvn(PERL_DEBUG_PAD(2), "", 0);
9998 /* Clone the regex array */
9999 PL_regex_padav = newAV();
10001 I32 len = av_len((AV*)proto_perl->Iregex_padav);
10002 SV** regexen = AvARRAY((AV*)proto_perl->Iregex_padav);
10003 av_push(PL_regex_padav,
10004 sv_dup_inc(regexen[0],param));
10005 for(i = 1; i <= len; i++) {
10006 if(SvREPADTMP(regexen[i])) {
10007 av_push(PL_regex_padav, sv_dup_inc(regexen[i], param));
10009 av_push(PL_regex_padav,
10011 newSViv(PTR2IV(re_dup(INT2PTR(REGEXP *,
10012 SvIVX(regexen[i])), param)))
10017 PL_regex_pad = AvARRAY(PL_regex_padav);
10019 /* shortcuts to various I/O objects */
10020 PL_stdingv = gv_dup(proto_perl->Istdingv, param);
10021 PL_stderrgv = gv_dup(proto_perl->Istderrgv, param);
10022 PL_defgv = gv_dup(proto_perl->Idefgv, param);
10023 PL_argvgv = gv_dup(proto_perl->Iargvgv, param);
10024 PL_argvoutgv = gv_dup(proto_perl->Iargvoutgv, param);
10025 PL_argvout_stack = av_dup_inc(proto_perl->Iargvout_stack, param);
10027 /* shortcuts to regexp stuff */
10028 PL_replgv = gv_dup(proto_perl->Ireplgv, param);
10030 /* shortcuts to misc objects */
10031 PL_errgv = gv_dup(proto_perl->Ierrgv, param);
10033 /* shortcuts to debugging objects */
10034 PL_DBgv = gv_dup(proto_perl->IDBgv, param);
10035 PL_DBline = gv_dup(proto_perl->IDBline, param);
10036 PL_DBsub = gv_dup(proto_perl->IDBsub, param);
10037 PL_DBsingle = sv_dup(proto_perl->IDBsingle, param);
10038 PL_DBtrace = sv_dup(proto_perl->IDBtrace, param);
10039 PL_DBsignal = sv_dup(proto_perl->IDBsignal, param);
10040 PL_lineary = av_dup(proto_perl->Ilineary, param);
10041 PL_dbargs = av_dup(proto_perl->Idbargs, param);
10043 /* symbol tables */
10044 PL_defstash = hv_dup_inc(proto_perl->Tdefstash, param);
10045 PL_curstash = hv_dup(proto_perl->Tcurstash, param);
10046 PL_nullstash = hv_dup(proto_perl->Inullstash, param);
10047 PL_debstash = hv_dup(proto_perl->Idebstash, param);
10048 PL_globalstash = hv_dup(proto_perl->Iglobalstash, param);
10049 PL_curstname = sv_dup_inc(proto_perl->Icurstname, param);
10051 PL_beginav = av_dup_inc(proto_perl->Ibeginav, param);
10052 PL_beginav_save = av_dup_inc(proto_perl->Ibeginav_save, param);
10053 PL_endav = av_dup_inc(proto_perl->Iendav, param);
10054 PL_checkav = av_dup_inc(proto_perl->Icheckav, param);
10055 PL_initav = av_dup_inc(proto_perl->Iinitav, param);
10057 PL_sub_generation = proto_perl->Isub_generation;
10059 /* funky return mechanisms */
10060 PL_forkprocess = proto_perl->Iforkprocess;
10062 /* subprocess state */
10063 PL_fdpid = av_dup_inc(proto_perl->Ifdpid, param);
10065 /* internal state */
10066 PL_tainting = proto_perl->Itainting;
10067 PL_maxo = proto_perl->Imaxo;
10068 if (proto_perl->Iop_mask)
10069 PL_op_mask = SAVEPVN(proto_perl->Iop_mask, PL_maxo);
10071 PL_op_mask = Nullch;
10073 /* current interpreter roots */
10074 PL_main_cv = cv_dup_inc(proto_perl->Imain_cv, param);
10075 PL_main_root = OpREFCNT_inc(proto_perl->Imain_root);
10076 PL_main_start = proto_perl->Imain_start;
10077 PL_eval_root = proto_perl->Ieval_root;
10078 PL_eval_start = proto_perl->Ieval_start;
10080 /* runtime control stuff */
10081 PL_curcopdb = (COP*)any_dup(proto_perl->Icurcopdb, proto_perl);
10082 PL_copline = proto_perl->Icopline;
10084 PL_filemode = proto_perl->Ifilemode;
10085 PL_lastfd = proto_perl->Ilastfd;
10086 PL_oldname = proto_perl->Ioldname; /* XXX not quite right */
10089 PL_gensym = proto_perl->Igensym;
10090 PL_preambled = proto_perl->Ipreambled;
10091 PL_preambleav = av_dup_inc(proto_perl->Ipreambleav, param);
10092 PL_laststatval = proto_perl->Ilaststatval;
10093 PL_laststype = proto_perl->Ilaststype;
10094 PL_mess_sv = Nullsv;
10096 PL_ors_sv = sv_dup_inc(proto_perl->Iors_sv, param);
10097 PL_ofmt = SAVEPV(proto_perl->Iofmt);
10099 /* interpreter atexit processing */
10100 PL_exitlistlen = proto_perl->Iexitlistlen;
10101 if (PL_exitlistlen) {
10102 New(0, PL_exitlist, PL_exitlistlen, PerlExitListEntry);
10103 Copy(proto_perl->Iexitlist, PL_exitlist, PL_exitlistlen, PerlExitListEntry);
10106 PL_exitlist = (PerlExitListEntry*)NULL;
10107 PL_modglobal = hv_dup_inc(proto_perl->Imodglobal, param);
10108 PL_custom_op_names = hv_dup_inc(proto_perl->Icustom_op_names,param);
10109 PL_custom_op_descs = hv_dup_inc(proto_perl->Icustom_op_descs,param);
10111 PL_profiledata = NULL;
10112 PL_rsfp = fp_dup(proto_perl->Irsfp, '<', param);
10113 /* PL_rsfp_filters entries have fake IoDIRP() */
10114 PL_rsfp_filters = av_dup_inc(proto_perl->Irsfp_filters, param);
10116 PL_compcv = cv_dup(proto_perl->Icompcv, param);
10117 PL_comppad = av_dup(proto_perl->Icomppad, param);
10118 PL_comppad_name = av_dup(proto_perl->Icomppad_name, param);
10119 PL_comppad_name_fill = proto_perl->Icomppad_name_fill;
10120 PL_comppad_name_floor = proto_perl->Icomppad_name_floor;
10121 PL_curpad = (SV**)ptr_table_fetch(PL_ptr_table,
10122 proto_perl->Tcurpad);
10124 #ifdef HAVE_INTERP_INTERN
10125 sys_intern_dup(&proto_perl->Isys_intern, &PL_sys_intern);
10128 /* more statics moved here */
10129 PL_generation = proto_perl->Igeneration;
10130 PL_DBcv = cv_dup(proto_perl->IDBcv, param);
10132 PL_in_clean_objs = proto_perl->Iin_clean_objs;
10133 PL_in_clean_all = proto_perl->Iin_clean_all;
10135 PL_uid = proto_perl->Iuid;
10136 PL_euid = proto_perl->Ieuid;
10137 PL_gid = proto_perl->Igid;
10138 PL_egid = proto_perl->Iegid;
10139 PL_nomemok = proto_perl->Inomemok;
10140 PL_an = proto_perl->Ian;
10141 PL_cop_seqmax = proto_perl->Icop_seqmax;
10142 PL_op_seqmax = proto_perl->Iop_seqmax;
10143 PL_evalseq = proto_perl->Ievalseq;
10144 PL_origenviron = proto_perl->Iorigenviron; /* XXX not quite right */
10145 PL_origalen = proto_perl->Iorigalen;
10146 PL_pidstatus = newHV(); /* XXX flag for cloning? */
10147 PL_osname = SAVEPV(proto_perl->Iosname);
10148 PL_sh_path = proto_perl->Ish_path; /* XXX never deallocated */
10149 PL_sighandlerp = proto_perl->Isighandlerp;
10152 PL_runops = proto_perl->Irunops;
10154 Copy(proto_perl->Itokenbuf, PL_tokenbuf, 256, char);
10157 PL_cshlen = proto_perl->Icshlen;
10158 PL_cshname = proto_perl->Icshname; /* XXX never deallocated */
10161 PL_lex_state = proto_perl->Ilex_state;
10162 PL_lex_defer = proto_perl->Ilex_defer;
10163 PL_lex_expect = proto_perl->Ilex_expect;
10164 PL_lex_formbrack = proto_perl->Ilex_formbrack;
10165 PL_lex_dojoin = proto_perl->Ilex_dojoin;
10166 PL_lex_starts = proto_perl->Ilex_starts;
10167 PL_lex_stuff = sv_dup_inc(proto_perl->Ilex_stuff, param);
10168 PL_lex_repl = sv_dup_inc(proto_perl->Ilex_repl, param);
10169 PL_lex_op = proto_perl->Ilex_op;
10170 PL_lex_inpat = proto_perl->Ilex_inpat;
10171 PL_lex_inwhat = proto_perl->Ilex_inwhat;
10172 PL_lex_brackets = proto_perl->Ilex_brackets;
10173 i = (PL_lex_brackets < 120 ? 120 : PL_lex_brackets);
10174 PL_lex_brackstack = SAVEPVN(proto_perl->Ilex_brackstack,i);
10175 PL_lex_casemods = proto_perl->Ilex_casemods;
10176 i = (PL_lex_casemods < 12 ? 12 : PL_lex_casemods);
10177 PL_lex_casestack = SAVEPVN(proto_perl->Ilex_casestack,i);
10179 Copy(proto_perl->Inextval, PL_nextval, 5, YYSTYPE);
10180 Copy(proto_perl->Inexttype, PL_nexttype, 5, I32);
10181 PL_nexttoke = proto_perl->Inexttoke;
10183 PL_linestr = sv_dup_inc(proto_perl->Ilinestr, param);
10184 i = proto_perl->Ibufptr - SvPVX(proto_perl->Ilinestr);
10185 PL_bufptr = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10186 i = proto_perl->Ioldbufptr - SvPVX(proto_perl->Ilinestr);
10187 PL_oldbufptr = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10188 i = proto_perl->Ioldoldbufptr - SvPVX(proto_perl->Ilinestr);
10189 PL_oldoldbufptr = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10190 PL_bufend = SvPVX(PL_linestr) + SvCUR(PL_linestr);
10191 i = proto_perl->Ilinestart - SvPVX(proto_perl->Ilinestr);
10192 PL_linestart = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10193 PL_pending_ident = proto_perl->Ipending_ident;
10194 PL_sublex_info = proto_perl->Isublex_info; /* XXX not quite right */
10196 PL_expect = proto_perl->Iexpect;
10198 PL_multi_start = proto_perl->Imulti_start;
10199 PL_multi_end = proto_perl->Imulti_end;
10200 PL_multi_open = proto_perl->Imulti_open;
10201 PL_multi_close = proto_perl->Imulti_close;
10203 PL_error_count = proto_perl->Ierror_count;
10204 PL_subline = proto_perl->Isubline;
10205 PL_subname = sv_dup_inc(proto_perl->Isubname, param);
10207 PL_min_intro_pending = proto_perl->Imin_intro_pending;
10208 PL_max_intro_pending = proto_perl->Imax_intro_pending;
10209 PL_padix = proto_perl->Ipadix;
10210 PL_padix_floor = proto_perl->Ipadix_floor;
10211 PL_pad_reset_pending = proto_perl->Ipad_reset_pending;
10213 i = proto_perl->Ilast_uni - SvPVX(proto_perl->Ilinestr);
10214 PL_last_uni = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10215 i = proto_perl->Ilast_lop - SvPVX(proto_perl->Ilinestr);
10216 PL_last_lop = SvPVX(PL_linestr) + (i < 0 ? 0 : i);
10217 PL_last_lop_op = proto_perl->Ilast_lop_op;
10218 PL_in_my = proto_perl->Iin_my;
10219 PL_in_my_stash = hv_dup(proto_perl->Iin_my_stash, param);
10221 PL_cryptseen = proto_perl->Icryptseen;
10224 PL_hints = proto_perl->Ihints;
10226 PL_amagic_generation = proto_perl->Iamagic_generation;
10228 #ifdef USE_LOCALE_COLLATE
10229 PL_collation_ix = proto_perl->Icollation_ix;
10230 PL_collation_name = SAVEPV(proto_perl->Icollation_name);
10231 PL_collation_standard = proto_perl->Icollation_standard;
10232 PL_collxfrm_base = proto_perl->Icollxfrm_base;
10233 PL_collxfrm_mult = proto_perl->Icollxfrm_mult;
10234 #endif /* USE_LOCALE_COLLATE */
10236 #ifdef USE_LOCALE_NUMERIC
10237 PL_numeric_name = SAVEPV(proto_perl->Inumeric_name);
10238 PL_numeric_standard = proto_perl->Inumeric_standard;
10239 PL_numeric_local = proto_perl->Inumeric_local;
10240 PL_numeric_radix_sv = sv_dup_inc(proto_perl->Inumeric_radix_sv, param);
10241 #endif /* !USE_LOCALE_NUMERIC */
10243 /* utf8 character classes */
10244 PL_utf8_alnum = sv_dup_inc(proto_perl->Iutf8_alnum, param);
10245 PL_utf8_alnumc = sv_dup_inc(proto_perl->Iutf8_alnumc, param);
10246 PL_utf8_ascii = sv_dup_inc(proto_perl->Iutf8_ascii, param);
10247 PL_utf8_alpha = sv_dup_inc(proto_perl->Iutf8_alpha, param);
10248 PL_utf8_space = sv_dup_inc(proto_perl->Iutf8_space, param);
10249 PL_utf8_cntrl = sv_dup_inc(proto_perl->Iutf8_cntrl, param);
10250 PL_utf8_graph = sv_dup_inc(proto_perl->Iutf8_graph, param);
10251 PL_utf8_digit = sv_dup_inc(proto_perl->Iutf8_digit, param);
10252 PL_utf8_upper = sv_dup_inc(proto_perl->Iutf8_upper, param);
10253 PL_utf8_lower = sv_dup_inc(proto_perl->Iutf8_lower, param);
10254 PL_utf8_print = sv_dup_inc(proto_perl->Iutf8_print, param);
10255 PL_utf8_punct = sv_dup_inc(proto_perl->Iutf8_punct, param);
10256 PL_utf8_xdigit = sv_dup_inc(proto_perl->Iutf8_xdigit, param);
10257 PL_utf8_mark = sv_dup_inc(proto_perl->Iutf8_mark, param);
10258 PL_utf8_toupper = sv_dup_inc(proto_perl->Iutf8_toupper, param);
10259 PL_utf8_totitle = sv_dup_inc(proto_perl->Iutf8_totitle, param);
10260 PL_utf8_tolower = sv_dup_inc(proto_perl->Iutf8_tolower, param);
10261 PL_utf8_tofold = sv_dup_inc(proto_perl->Iutf8_tofold, param);
10264 PL_last_swash_hv = Nullhv; /* reinits on demand */
10265 PL_last_swash_klen = 0;
10266 PL_last_swash_key[0]= '\0';
10267 PL_last_swash_tmps = (U8*)NULL;
10268 PL_last_swash_slen = 0;
10270 /* perly.c globals */
10271 PL_yydebug = proto_perl->Iyydebug;
10272 PL_yynerrs = proto_perl->Iyynerrs;
10273 PL_yyerrflag = proto_perl->Iyyerrflag;
10274 PL_yychar = proto_perl->Iyychar;
10275 PL_yyval = proto_perl->Iyyval;
10276 PL_yylval = proto_perl->Iyylval;
10278 PL_glob_index = proto_perl->Iglob_index;
10279 PL_srand_called = proto_perl->Isrand_called;
10280 PL_uudmap['M'] = 0; /* reinits on demand */
10281 PL_bitcount = Nullch; /* reinits on demand */
10283 if (proto_perl->Ipsig_pend) {
10284 Newz(0, PL_psig_pend, SIG_SIZE, int);
10287 PL_psig_pend = (int*)NULL;
10290 if (proto_perl->Ipsig_ptr) {
10291 Newz(0, PL_psig_ptr, SIG_SIZE, SV*);
10292 Newz(0, PL_psig_name, SIG_SIZE, SV*);
10293 for (i = 1; i < SIG_SIZE; i++) {
10294 PL_psig_ptr[i] = sv_dup_inc(proto_perl->Ipsig_ptr[i], param);
10295 PL_psig_name[i] = sv_dup_inc(proto_perl->Ipsig_name[i], param);
10299 PL_psig_ptr = (SV**)NULL;
10300 PL_psig_name = (SV**)NULL;
10303 /* thrdvar.h stuff */
10305 if (flags & CLONEf_COPY_STACKS) {
10306 /* next allocation will be PL_tmps_stack[PL_tmps_ix+1] */
10307 PL_tmps_ix = proto_perl->Ttmps_ix;
10308 PL_tmps_max = proto_perl->Ttmps_max;
10309 PL_tmps_floor = proto_perl->Ttmps_floor;
10310 Newz(50, PL_tmps_stack, PL_tmps_max, SV*);
10312 while (i <= PL_tmps_ix) {
10313 PL_tmps_stack[i] = sv_dup_inc(proto_perl->Ttmps_stack[i], param);
10317 /* next PUSHMARK() sets *(PL_markstack_ptr+1) */
10318 i = proto_perl->Tmarkstack_max - proto_perl->Tmarkstack;
10319 Newz(54, PL_markstack, i, I32);
10320 PL_markstack_max = PL_markstack + (proto_perl->Tmarkstack_max
10321 - proto_perl->Tmarkstack);
10322 PL_markstack_ptr = PL_markstack + (proto_perl->Tmarkstack_ptr
10323 - proto_perl->Tmarkstack);
10324 Copy(proto_perl->Tmarkstack, PL_markstack,
10325 PL_markstack_ptr - PL_markstack + 1, I32);
10327 /* next push_scope()/ENTER sets PL_scopestack[PL_scopestack_ix]
10328 * NOTE: unlike the others! */
10329 PL_scopestack_ix = proto_perl->Tscopestack_ix;
10330 PL_scopestack_max = proto_perl->Tscopestack_max;
10331 Newz(54, PL_scopestack, PL_scopestack_max, I32);
10332 Copy(proto_perl->Tscopestack, PL_scopestack, PL_scopestack_ix, I32);
10334 /* next push_return() sets PL_retstack[PL_retstack_ix]
10335 * NOTE: unlike the others! */
10336 PL_retstack_ix = proto_perl->Tretstack_ix;
10337 PL_retstack_max = proto_perl->Tretstack_max;
10338 Newz(54, PL_retstack, PL_retstack_max, OP*);
10339 Copy(proto_perl->Tretstack, PL_retstack, PL_retstack_ix, I32);
10341 /* NOTE: si_dup() looks at PL_markstack */
10342 PL_curstackinfo = si_dup(proto_perl->Tcurstackinfo, param);
10344 /* PL_curstack = PL_curstackinfo->si_stack; */
10345 PL_curstack = av_dup(proto_perl->Tcurstack, param);
10346 PL_mainstack = av_dup(proto_perl->Tmainstack, param);
10348 /* next PUSHs() etc. set *(PL_stack_sp+1) */
10349 PL_stack_base = AvARRAY(PL_curstack);
10350 PL_stack_sp = PL_stack_base + (proto_perl->Tstack_sp
10351 - proto_perl->Tstack_base);
10352 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
10354 /* next SSPUSHFOO() sets PL_savestack[PL_savestack_ix]
10355 * NOTE: unlike the others! */
10356 PL_savestack_ix = proto_perl->Tsavestack_ix;
10357 PL_savestack_max = proto_perl->Tsavestack_max;
10358 /*Newz(54, PL_savestack, PL_savestack_max, ANY);*/
10359 PL_savestack = ss_dup(proto_perl, param);
10363 ENTER; /* perl_destruct() wants to LEAVE; */
10366 PL_start_env = proto_perl->Tstart_env; /* XXXXXX */
10367 PL_top_env = &PL_start_env;
10369 PL_op = proto_perl->Top;
10372 PL_Xpv = (XPV*)NULL;
10373 PL_na = proto_perl->Tna;
10375 PL_statbuf = proto_perl->Tstatbuf;
10376 PL_statcache = proto_perl->Tstatcache;
10377 PL_statgv = gv_dup(proto_perl->Tstatgv, param);
10378 PL_statname = sv_dup_inc(proto_perl->Tstatname, param);
10380 PL_timesbuf = proto_perl->Ttimesbuf;
10383 PL_tainted = proto_perl->Ttainted;
10384 PL_curpm = proto_perl->Tcurpm; /* XXX No PMOP ref count */
10385 PL_rs = sv_dup_inc(proto_perl->Trs, param);
10386 PL_last_in_gv = gv_dup(proto_perl->Tlast_in_gv, param);
10387 PL_ofs_sv = sv_dup_inc(proto_perl->Tofs_sv, param);
10388 PL_defoutgv = gv_dup_inc(proto_perl->Tdefoutgv, param);
10389 PL_chopset = proto_perl->Tchopset; /* XXX never deallocated */
10390 PL_toptarget = sv_dup_inc(proto_perl->Ttoptarget, param);
10391 PL_bodytarget = sv_dup_inc(proto_perl->Tbodytarget, param);
10392 PL_formtarget = sv_dup(proto_perl->Tformtarget, param);
10394 PL_restartop = proto_perl->Trestartop;
10395 PL_in_eval = proto_perl->Tin_eval;
10396 PL_delaymagic = proto_perl->Tdelaymagic;
10397 PL_dirty = proto_perl->Tdirty;
10398 PL_localizing = proto_perl->Tlocalizing;
10400 #ifdef PERL_FLEXIBLE_EXCEPTIONS
10401 PL_protect = proto_perl->Tprotect;
10403 PL_errors = sv_dup_inc(proto_perl->Terrors, param);
10404 PL_av_fetch_sv = Nullsv;
10405 PL_hv_fetch_sv = Nullsv;
10406 Zero(&PL_hv_fetch_ent_mh, 1, HE); /* XXX */
10407 PL_modcount = proto_perl->Tmodcount;
10408 PL_lastgotoprobe = Nullop;
10409 PL_dumpindent = proto_perl->Tdumpindent;
10411 PL_sortcop = (OP*)any_dup(proto_perl->Tsortcop, proto_perl);
10412 PL_sortstash = hv_dup(proto_perl->Tsortstash, param);
10413 PL_firstgv = gv_dup(proto_perl->Tfirstgv, param);
10414 PL_secondgv = gv_dup(proto_perl->Tsecondgv, param);
10415 PL_sortcxix = proto_perl->Tsortcxix;
10416 PL_efloatbuf = Nullch; /* reinits on demand */
10417 PL_efloatsize = 0; /* reinits on demand */
10421 PL_screamfirst = NULL;
10422 PL_screamnext = NULL;
10423 PL_maxscream = -1; /* reinits on demand */
10424 PL_lastscream = Nullsv;
10426 PL_watchaddr = NULL;
10427 PL_watchok = Nullch;
10429 PL_regdummy = proto_perl->Tregdummy;
10430 PL_regcomp_parse = Nullch;
10431 PL_regxend = Nullch;
10432 PL_regcode = (regnode*)NULL;
10435 PL_regprecomp = Nullch;
10440 PL_seen_zerolen = 0;
10442 PL_regcomp_rx = (regexp*)NULL;
10444 PL_colorset = 0; /* reinits PL_colors[] */
10445 /*PL_colors[6] = {0,0,0,0,0,0};*/
10446 PL_reg_whilem_seen = 0;
10447 PL_reginput = Nullch;
10448 PL_regbol = Nullch;
10449 PL_regeol = Nullch;
10450 PL_regstartp = (I32*)NULL;
10451 PL_regendp = (I32*)NULL;
10452 PL_reglastparen = (U32*)NULL;
10453 PL_regtill = Nullch;
10454 PL_reg_start_tmp = (char**)NULL;
10455 PL_reg_start_tmpl = 0;
10456 PL_regdata = (struct reg_data*)NULL;
10459 PL_reg_eval_set = 0;
10461 PL_regprogram = (regnode*)NULL;
10463 PL_regcc = (CURCUR*)NULL;
10464 PL_reg_call_cc = (struct re_cc_state*)NULL;
10465 PL_reg_re = (regexp*)NULL;
10466 PL_reg_ganch = Nullch;
10467 PL_reg_sv = Nullsv;
10468 PL_reg_match_utf8 = FALSE;
10469 PL_reg_magic = (MAGIC*)NULL;
10471 PL_reg_oldcurpm = (PMOP*)NULL;
10472 PL_reg_curpm = (PMOP*)NULL;
10473 PL_reg_oldsaved = Nullch;
10474 PL_reg_oldsavedlen = 0;
10475 PL_reg_maxiter = 0;
10476 PL_reg_leftiter = 0;
10477 PL_reg_poscache = Nullch;
10478 PL_reg_poscache_size= 0;
10480 /* RE engine - function pointers */
10481 PL_regcompp = proto_perl->Tregcompp;
10482 PL_regexecp = proto_perl->Tregexecp;
10483 PL_regint_start = proto_perl->Tregint_start;
10484 PL_regint_string = proto_perl->Tregint_string;
10485 PL_regfree = proto_perl->Tregfree;
10487 PL_reginterp_cnt = 0;
10488 PL_reg_starttry = 0;
10490 /* Pluggable optimizer */
10491 PL_peepp = proto_perl->Tpeepp;
10493 if (!(flags & CLONEf_KEEP_PTR_TABLE)) {
10494 ptr_table_free(PL_ptr_table);
10495 PL_ptr_table = NULL;
10498 /* Call the ->CLONE method, if it exists, for each of the stashes
10499 identified by sv_dup() above.
10501 while(av_len(param->stashes) != -1) {
10502 HV* stash = (HV*) av_shift(param->stashes);
10503 GV* cloner = gv_fetchmethod_autoload(stash, "CLONE", 0);
10504 if (cloner && GvCV(cloner)) {
10509 XPUSHs(sv_2mortal(newSVpv(HvNAME(stash), 0)));
10511 call_sv((SV*)GvCV(cloner), G_DISCARD);
10517 SvREFCNT_dec(param->stashes);
10522 #endif /* USE_ITHREADS */
10525 =head1 Unicode Support
10527 =for apidoc sv_recode_to_utf8
10529 The encoding is assumed to be an Encode object, on entry the PV
10530 of the sv is assumed to be octets in that encoding, and the sv
10531 will be converted into Unicode (and UTF-8).
10533 If the sv already is UTF-8 (or if it is not POK), or if the encoding
10534 is not a reference, nothing is done to the sv. If the encoding is not
10535 an C<Encode::XS> Encoding object, bad things will happen.
10536 (See F<lib/encoding.pm> and L<Encode>).
10538 The PV of the sv is returned.
10543 Perl_sv_recode_to_utf8(pTHX_ SV *sv, SV *encoding)
10545 if (SvPOK(sv) && !DO_UTF8(sv) && SvROK(encoding)) {
10556 XPUSHs(&PL_sv_yes);
10558 call_method("decode", G_SCALAR);
10562 s = SvPV(uni, len);
10563 if (s != SvPVX(sv)) {
10565 Move(s, SvPVX(sv), len, char);
10566 SvCUR_set(sv, len);