/* av.c
*
- * Copyright (c) 1991-2000, Larry Wall
+ * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
+ * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
*/
/*
- * "...for the Entwives desired order, and plenty, and peace (by which they
- * meant that things should remain where they had set them)." --Treebeard
+ * '...for the Entwives desired order, and plenty, and peace (by which they
+ * meant that things should remain where they had set them).' --Treebeard
+ *
+ * [p.476 of _The Lord of the Rings_, III/iv: "Treebeard"]
*/
+/*
+=head1 Array Manipulation Functions
+*/
+
#include "EXTERN.h"
#define PERL_IN_AV_C
#include "perl.h"
void
Perl_av_reify(pTHX_ AV *av)
{
+ dVAR;
I32 key;
- SV* sv;
+
+ PERL_ARGS_ASSERT_AV_REIFY;
+ assert(SvTYPE(av) == SVt_PVAV);
if (AvREAL(av))
return;
#ifdef DEBUGGING
- if (SvTIED_mg((SV*)av, 'P') && ckWARN_d(WARN_DEBUGGING))
- Perl_warner(aTHX_ WARN_DEBUGGING, "av_reify called on tied array");
+ if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
+ Perl_ck_warner_d(aTHX_ packWARN(WARN_DEBUGGING), "av_reify called on tied array");
#endif
key = AvMAX(av) + 1;
while (key > AvFILLp(av) + 1)
AvARRAY(av)[--key] = &PL_sv_undef;
while (key) {
- sv = AvARRAY(av)[--key];
+ SV * const sv = AvARRAY(av)[--key];
assert(sv);
if (sv != &PL_sv_undef)
- (void)SvREFCNT_inc(sv);
+ SvREFCNT_inc_simple_void_NN(sv);
}
key = AvARRAY(av) - AvALLOC(av);
while (key)
void
Perl_av_extend(pTHX_ AV *av, I32 key)
{
+ dVAR;
MAGIC *mg;
- if ((mg = SvTIED_mg((SV*)av, 'P'))) {
+
+ PERL_ARGS_ASSERT_AV_EXTEND;
+ assert(SvTYPE(av) == SVt_PVAV);
+
+ mg = SvTIED_mg((const SV *)av, PERL_MAGIC_tied);
+ if (mg) {
dSP;
ENTER;
SAVETMPS;
PUSHSTACKi(PERLSI_MAGIC);
PUSHMARK(SP);
EXTEND(SP,2);
- PUSHs(SvTIED_obj((SV*)av, mg));
- PUSHs(sv_2mortal(newSViv(key+1)));
+ PUSHs(SvTIED_obj(MUTABLE_SV(av), mg));
+ mPUSHi(key + 1);
PUTBACK;
call_method("EXTEND", G_SCALAR|G_DISCARD);
POPSTACK;
tmp = AvARRAY(av) - AvALLOC(av);
Move(AvARRAY(av), AvALLOC(av), AvFILLp(av)+1, SV*);
AvMAX(av) += tmp;
- SvPVX(av) = (char*)AvALLOC(av);
+ AvARRAY(av) = AvALLOC(av);
if (AvREAL(av)) {
while (tmp)
ary[--tmp] = &PL_sv_undef;
}
-
if (key > AvMAX(av) - 10) {
newmax = key + AvMAX(av);
goto resize;
}
}
else {
+#ifdef PERL_MALLOC_WRAP
+ static const char oom_array_extend[] =
+ "Out of memory during array extend"; /* Duplicated in pp_hot.c */
+#endif
+
if (AvALLOC(av)) {
-#ifndef STRANGE_MALLOC
+#if !defined(STRANGE_MALLOC) && !defined(MYMALLOC)
MEM_SIZE bytes;
IV itmp;
#endif
-#if defined(MYMALLOC) && !defined(LEAKTEST)
- newmax = malloced_size((void*)AvALLOC(av))/sizeof(SV*) - 1;
+#ifdef Perl_safesysmalloc_size
+ /* Whilst it would be quite possible to move this logic around
+ (as I did in the SV code), so as to set AvMAX(av) early,
+ based on calling Perl_safesysmalloc_size() immediately after
+ allocation, I'm not convinced that it is a great idea here.
+ In an array we have to loop round setting everything to
+ &PL_sv_undef, which means writing to memory, potentially lots
+ of it, whereas for the SV buffer case we don't touch the
+ "bonus" memory. So there there is no cost in telling the
+ world about it, whereas here we have to do work before we can
+ tell the world about it, and that work involves writing to
+ memory that might never be read. So, I feel, better to keep
+ the current lazy system of only writing to it if our caller
+ has a need for more space. NWC */
+ newmax = Perl_safesysmalloc_size((void*)AvALLOC(av)) /
+ sizeof(const SV *) - 1;
if (key <= newmax)
goto resized;
#endif
newmax = key + AvMAX(av) / 5;
resize:
+ MEM_WRAP_CHECK_1(newmax+1, SV*, oom_array_extend);
#if defined(STRANGE_MALLOC) || defined(MYMALLOC)
Renew(AvALLOC(av),newmax+1, SV*);
#else
- bytes = (newmax + 1) * sizeof(SV*);
+ bytes = (newmax + 1) * sizeof(const SV *);
#define MALLOC_OVERHEAD 16
itmp = MALLOC_OVERHEAD;
- while (itmp - MALLOC_OVERHEAD < bytes)
+ while ((MEM_SIZE)(itmp - MALLOC_OVERHEAD) < bytes)
itmp += itmp;
itmp -= MALLOC_OVERHEAD;
- itmp /= sizeof(SV*);
+ itmp /= sizeof(const SV *);
assert(itmp > newmax);
newmax = itmp - 1;
assert(newmax >= AvMAX(av));
- New(2,ary, newmax+1, SV*);
+ Newx(ary, newmax+1, SV*);
Copy(AvALLOC(av), ary, AvMAX(av)+1, SV*);
if (AvMAX(av) > 64)
- offer_nice_chunk(AvALLOC(av), (AvMAX(av)+1) * sizeof(SV*));
+ offer_nice_chunk(AvALLOC(av),
+ (AvMAX(av)+1) * sizeof(const SV *));
else
Safefree(AvALLOC(av));
AvALLOC(av) = ary;
#endif
+#ifdef Perl_safesysmalloc_size
resized:
+#endif
ary = AvALLOC(av) + AvMAX(av) + 1;
tmp = newmax - AvMAX(av);
if (av == PL_curstack) { /* Oops, grew stack (via av_store()?) */
}
else {
newmax = key < 3 ? 3 : key;
- New(2,AvALLOC(av), newmax+1, SV*);
+ MEM_WRAP_CHECK_1(newmax+1, SV*, oom_array_extend);
+ Newx(AvALLOC(av), newmax+1, SV*);
ary = AvALLOC(av) + 1;
tmp = newmax;
AvALLOC(av)[0] = &PL_sv_undef; /* For the stacks */
ary[--tmp] = &PL_sv_undef;
}
- SvPVX(av) = (char*)AvALLOC(av);
+ AvARRAY(av) = AvALLOC(av);
AvMAX(av) = newmax;
}
}
SV**
Perl_av_fetch(pTHX_ register AV *av, I32 key, I32 lval)
{
- SV *sv;
+ dVAR;
+
+ PERL_ARGS_ASSERT_AV_FETCH;
+ assert(SvTYPE(av) == SVt_PVAV);
+
+ if (SvRMAGICAL(av)) {
+ const MAGIC * const tied_magic
+ = mg_find((const SV *)av, PERL_MAGIC_tied);
+ if (tied_magic || mg_find((const SV *)av, PERL_MAGIC_regdata)) {
+ SV *sv;
+ if (key < 0) {
+ I32 adjust_index = 1;
+ if (tied_magic) {
+ /* Handle negative array indices 20020222 MJD */
+ SV * const * const negative_indices_glob =
+ hv_fetch(SvSTASH(SvRV(SvTIED_obj(MUTABLE_SV(av),
+ tied_magic))),
+ NEGATIVE_INDICES_VAR, 16, 0);
+
+ if (negative_indices_glob && SvTRUE(GvSV(*negative_indices_glob)))
+ adjust_index = 0;
+ }
- if (!av)
- return 0;
+ if (adjust_index) {
+ key += AvFILL(av) + 1;
+ if (key < 0)
+ return NULL;
+ }
+ }
+
+ sv = sv_newmortal();
+ sv_upgrade(sv, SVt_PVLV);
+ mg_copy(MUTABLE_SV(av), sv, 0, key);
+ LvTYPE(sv) = 't';
+ LvTARG(sv) = sv; /* fake (SV**) */
+ return &(LvTARG(sv));
+ }
+ }
if (key < 0) {
key += AvFILL(av) + 1;
if (key < 0)
- return 0;
- }
-
- if (SvRMAGICAL(av)) {
- if (mg_find((SV*)av,'P') || mg_find((SV*)av,'D')) {
- sv = sv_newmortal();
- mg_copy((SV*)av, sv, 0, key);
- PL_av_fetch_sv = sv;
- return &PL_av_fetch_sv;
- }
+ return NULL;
}
if (key > AvFILLp(av)) {
if (!lval)
- return 0;
- sv = NEWSV(5,0);
- return av_store(av,key,sv);
+ return NULL;
+ return av_store(av,key,newSV(0));
}
if (AvARRAY(av)[key] == &PL_sv_undef) {
emptyness:
- if (lval) {
- sv = NEWSV(6,0);
- return av_store(av,key,sv);
- }
- return 0;
+ if (lval)
+ return av_store(av,key,newSV(0));
+ return NULL;
}
else if (AvREIFY(av)
&& (!AvARRAY(av)[key] /* eg. @_ could have freed elts */
- || SvTYPE(AvARRAY(av)[key]) == SVTYPEMASK)) {
+ || SvIS_FREED(AvARRAY(av)[key]))) {
AvARRAY(av)[key] = &PL_sv_undef; /* 1/2 reify */
goto emptyness;
}
SV**
Perl_av_store(pTHX_ register AV *av, I32 key, SV *val)
{
+ dVAR;
SV** ary;
- if (!av)
- return 0;
+ PERL_ARGS_ASSERT_AV_STORE;
+ assert(SvTYPE(av) == SVt_PVAV);
+
+ /* S_regclass relies on being able to pass in a NULL sv
+ (unicode_alternate may be NULL).
+ */
+
if (!val)
val = &PL_sv_undef;
+ if (SvRMAGICAL(av)) {
+ const MAGIC * const tied_magic = mg_find((const SV *)av, PERL_MAGIC_tied);
+ if (tied_magic) {
+ /* Handle negative array indices 20020222 MJD */
+ if (key < 0) {
+ bool adjust_index = 1;
+ SV * const * const negative_indices_glob =
+ hv_fetch(SvSTASH(SvRV(SvTIED_obj(MUTABLE_SV(av),
+ tied_magic))),
+ NEGATIVE_INDICES_VAR, 16, 0);
+ if (negative_indices_glob
+ && SvTRUE(GvSV(*negative_indices_glob)))
+ adjust_index = 0;
+ if (adjust_index) {
+ key += AvFILL(av) + 1;
+ if (key < 0)
+ return 0;
+ }
+ }
+ if (val != &PL_sv_undef) {
+ mg_copy(MUTABLE_SV(av), val, 0, key);
+ }
+ return NULL;
+ }
+ }
+
+
if (key < 0) {
key += AvFILL(av) + 1;
if (key < 0)
- return 0;
+ return NULL;
}
if (SvREADONLY(av) && key >= AvFILL(av))
- Perl_croak(aTHX_ PL_no_modify);
-
- if (SvRMAGICAL(av)) {
- if (mg_find((SV*)av,'P')) {
- if (val != &PL_sv_undef) {
- mg_copy((SV*)av, val, 0, key);
- }
- return 0;
- }
- }
+ Perl_croak(aTHX_ "%s", PL_no_modify);
if (!AvREAL(av) && AvREIFY(av))
av_reify(av);
if (!AvREAL(av)) {
if (av == PL_curstack && key > PL_stack_sp - PL_stack_base)
PL_stack_sp = PL_stack_base + key; /* XPUSH in disguise */
- do
+ do {
ary[++AvFILLp(av)] = &PL_sv_undef;
- while (AvFILLp(av) < key);
+ } while (AvFILLp(av) < key);
}
AvFILLp(av) = key;
}
SvREFCNT_dec(ary[key]);
ary[key] = val;
if (SvSMAGICAL(av)) {
+ const MAGIC* const mg = SvMAGIC(av);
if (val != &PL_sv_undef) {
- MAGIC* mg = SvMAGIC(av);
- sv_magic(val, (SV*)av, toLOWER(mg->mg_type), 0, key);
+ sv_magic(val, MUTABLE_SV(av), toLOWER(mg->mg_type), 0, key);
}
- mg_set((SV*)av);
+ if (PL_delaymagic && mg->mg_type == PERL_MAGIC_isa)
+ PL_delaymagic |= DM_ARRAY;
+ else
+ mg_set(MUTABLE_SV(av));
}
return &ary[key];
}
/*
-=for apidoc newAV
-
-Creates a new AV. The reference count is set to 1.
-
-=cut
-*/
-
-AV *
-Perl_newAV(pTHX)
-{
- register AV *av;
-
- av = (AV*)NEWSV(3,0);
- sv_upgrade((SV *)av, SVt_PVAV);
- AvREAL_on(av);
- AvALLOC(av) = 0;
- SvPVX(av) = 0;
- AvMAX(av) = AvFILLp(av) = -1;
- return av;
-}
-
-/*
=for apidoc av_make
Creates a new AV and populates it with a list of SVs. The SVs are copied
AV *
Perl_av_make(pTHX_ register I32 size, register SV **strp)
{
- register AV *av;
- register I32 i;
- register SV** ary;
-
- av = (AV*)NEWSV(8,0);
- sv_upgrade((SV *) av,SVt_PVAV);
- AvFLAGS(av) = AVf_REAL;
- if (size) { /* `defined' was returning undef for size==0 anyway. */
- New(4,ary,size,SV*);
+ register AV * const av = MUTABLE_AV(newSV_type(SVt_PVAV));
+ /* sv_upgrade does AvREAL_only() */
+ PERL_ARGS_ASSERT_AV_MAKE;
+ assert(SvTYPE(av) == SVt_PVAV);
+
+ if (size) { /* "defined" was returning undef for size==0 anyway. */
+ register SV** ary;
+ register I32 i;
+ Newx(ary,size,SV*);
AvALLOC(av) = ary;
- SvPVX(av) = (char*)ary;
- AvFILLp(av) = size - 1;
- AvMAX(av) = size - 1;
+ AvARRAY(av) = ary;
+ AvFILLp(av) = AvMAX(av) = size - 1;
for (i = 0; i < size; i++) {
assert (*strp);
- ary[i] = NEWSV(7,0);
- sv_setsv(ary[i], *strp);
+
+ /* Don't let sv_setsv swipe, since our source array might
+ have multiple references to the same temp scalar (e.g.
+ from a list slice) */
+
+ ary[i] = newSV(0);
+ sv_setsv_flags(ary[i], *strp,
+ SV_GMAGIC|SV_DO_COW_SVSETSV|SV_NOSTEAL);
strp++;
}
}
return av;
}
-AV *
-Perl_av_fake(pTHX_ register I32 size, register SV **strp)
-{
- register AV *av;
- register SV** ary;
-
- av = (AV*)NEWSV(9,0);
- sv_upgrade((SV *)av, SVt_PVAV);
- New(4,ary,size+1,SV*);
- AvALLOC(av) = ary;
- Copy(strp,ary,size,SV*);
- AvFLAGS(av) = AVf_REIFY;
- SvPVX(av) = (char*)ary;
- AvFILLp(av) = size - 1;
- AvMAX(av) = size - 1;
- while (size--) {
- assert (*strp);
- SvTEMP_off(*strp);
- strp++;
- }
- return av;
-}
-
/*
=for apidoc av_clear
void
Perl_av_clear(pTHX_ register AV *av)
{
- register I32 key;
- SV** ary;
+ dVAR;
+ I32 extra;
+
+ PERL_ARGS_ASSERT_AV_CLEAR;
+ assert(SvTYPE(av) == SVt_PVAV);
#ifdef DEBUGGING
- if (SvREFCNT(av) == 0 && ckWARN_d(WARN_DEBUGGING)) {
- Perl_warner(aTHX_ WARN_DEBUGGING, "Attempt to clear deleted array");
+ if (SvREFCNT(av) == 0) {
+ Perl_ck_warner_d(aTHX_ packWARN(WARN_DEBUGGING), "Attempt to clear deleted array");
}
#endif
- if (!av)
- return;
- /*SUPPRESS 560*/
if (SvREADONLY(av))
- Perl_croak(aTHX_ PL_no_modify);
+ Perl_croak(aTHX_ "%s", PL_no_modify);
/* Give any tie a chance to cleanup first */
- if (SvRMAGICAL(av))
- mg_clear((SV*)av);
+ if (SvRMAGICAL(av)) {
+ const MAGIC* const mg = SvMAGIC(av);
+ if (PL_delaymagic && mg && mg->mg_type == PERL_MAGIC_isa)
+ PL_delaymagic |= DM_ARRAY;
+ else
+ mg_clear(MUTABLE_SV(av));
+ }
if (AvMAX(av) < 0)
return;
if (AvREAL(av)) {
- ary = AvARRAY(av);
- key = AvFILLp(av) + 1;
- while (key) {
- SvREFCNT_dec(ary[--key]);
- ary[key] = &PL_sv_undef;
+ SV** const ary = AvARRAY(av);
+ I32 index = AvFILLp(av) + 1;
+ while (index) {
+ SV * const sv = ary[--index];
+ /* undef the slot before freeing the value, because a
+ * destructor might try to modify this array */
+ ary[index] = &PL_sv_undef;
+ SvREFCNT_dec(sv);
}
}
- if ((key = AvARRAY(av) - AvALLOC(av))) {
- AvMAX(av) += key;
- SvPVX(av) = (char*)AvALLOC(av);
+ extra = AvARRAY(av) - AvALLOC(av);
+ if (extra) {
+ AvMAX(av) += extra;
+ AvARRAY(av) = AvALLOC(av);
}
AvFILLp(av) = -1;
void
Perl_av_undef(pTHX_ register AV *av)
{
- register I32 key;
-
- if (!av)
- return;
- /*SUPPRESS 560*/
+ PERL_ARGS_ASSERT_AV_UNDEF;
+ assert(SvTYPE(av) == SVt_PVAV);
/* Give any tie a chance to cleanup first */
- if (SvTIED_mg((SV*)av, 'P'))
- av_fill(av, -1); /* mg_clear() ? */
+ if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
+ av_fill(av, -1);
if (AvREAL(av)) {
- key = AvFILLp(av) + 1;
+ register I32 key = AvFILLp(av) + 1;
while (key)
SvREFCNT_dec(AvARRAY(av)[--key]);
}
+
Safefree(AvALLOC(av));
- AvALLOC(av) = 0;
- SvPVX(av) = 0;
+ AvALLOC(av) = NULL;
+ AvARRAY(av) = NULL;
AvMAX(av) = AvFILLp(av) = -1;
- if (AvARYLEN(av)) {
- SvREFCNT_dec(AvARYLEN(av));
- AvARYLEN(av) = 0;
- }
+
+ if(SvRMAGICAL(av)) mg_clear(MUTABLE_SV(av));
+}
+
+/*
+
+=for apidoc av_create_and_push
+
+Push an SV onto the end of the array, creating the array if necessary.
+A small internal helper function to remove a commonly duplicated idiom.
+
+=cut
+*/
+
+void
+Perl_av_create_and_push(pTHX_ AV **const avp, SV *const val)
+{
+ PERL_ARGS_ASSERT_AV_CREATE_AND_PUSH;
+
+ if (!*avp)
+ *avp = newAV();
+ av_push(*avp, val);
}
/*
=for apidoc av_push
Pushes an SV onto the end of the array. The array will grow automatically
-to accommodate the addition.
+to accommodate the addition. Like C<av_store>, this takes ownership of one
+reference count.
=cut
*/
void
Perl_av_push(pTHX_ register AV *av, SV *val)
{
+ dVAR;
MAGIC *mg;
- if (!av)
- return;
+
+ PERL_ARGS_ASSERT_AV_PUSH;
+ assert(SvTYPE(av) == SVt_PVAV);
+
if (SvREADONLY(av))
- Perl_croak(aTHX_ PL_no_modify);
+ Perl_croak(aTHX_ "%s", PL_no_modify);
- if ((mg = SvTIED_mg((SV*)av, 'P'))) {
+ if ((mg = SvTIED_mg((const SV *)av, PERL_MAGIC_tied))) {
dSP;
PUSHSTACKi(PERLSI_MAGIC);
PUSHMARK(SP);
EXTEND(SP,2);
- PUSHs(SvTIED_obj((SV*)av, mg));
+ PUSHs(SvTIED_obj(MUTABLE_SV(av), mg));
PUSHs(val);
PUTBACK;
ENTER;
SV *
Perl_av_pop(pTHX_ register AV *av)
{
+ dVAR;
SV *retval;
MAGIC* mg;
- if (!av || AvFILL(av) < 0)
- return &PL_sv_undef;
+ PERL_ARGS_ASSERT_AV_POP;
+ assert(SvTYPE(av) == SVt_PVAV);
+
if (SvREADONLY(av))
- Perl_croak(aTHX_ PL_no_modify);
- if ((mg = SvTIED_mg((SV*)av, 'P'))) {
+ Perl_croak(aTHX_ "%s", PL_no_modify);
+ if ((mg = SvTIED_mg((const SV *)av, PERL_MAGIC_tied))) {
dSP;
PUSHSTACKi(PERLSI_MAGIC);
PUSHMARK(SP);
- XPUSHs(SvTIED_obj((SV*)av, mg));
+ XPUSHs(SvTIED_obj(MUTABLE_SV(av), mg));
PUTBACK;
ENTER;
if (call_method("POP", G_SCALAR)) {
POPSTACK;
return retval;
}
+ if (AvFILL(av) < 0)
+ return &PL_sv_undef;
retval = AvARRAY(av)[AvFILLp(av)];
AvARRAY(av)[AvFILLp(av)--] = &PL_sv_undef;
if (SvSMAGICAL(av))
- mg_set((SV*)av);
+ mg_set(MUTABLE_SV(av));
return retval;
}
/*
+
+=for apidoc av_create_and_unshift_one
+
+Unshifts an SV onto the beginning of the array, creating the array if
+necessary.
+A small internal helper function to remove a commonly duplicated idiom.
+
+=cut
+*/
+
+SV **
+Perl_av_create_and_unshift_one(pTHX_ AV **const avp, SV *const val)
+{
+ PERL_ARGS_ASSERT_AV_CREATE_AND_UNSHIFT_ONE;
+
+ if (!*avp)
+ *avp = newAV();
+ av_unshift(*avp, 1);
+ return av_store(*avp, 0, val);
+}
+
+/*
=for apidoc av_unshift
Unshift the given number of C<undef> values onto the beginning of the
void
Perl_av_unshift(pTHX_ register AV *av, register I32 num)
{
+ dVAR;
register I32 i;
- register SV **ary;
MAGIC* mg;
- I32 slide;
- if (!av || num <= 0)
- return;
+ PERL_ARGS_ASSERT_AV_UNSHIFT;
+ assert(SvTYPE(av) == SVt_PVAV);
+
if (SvREADONLY(av))
- Perl_croak(aTHX_ PL_no_modify);
+ Perl_croak(aTHX_ "%s", PL_no_modify);
- if ((mg = SvTIED_mg((SV*)av, 'P'))) {
+ if ((mg = SvTIED_mg((const SV *)av, PERL_MAGIC_tied))) {
dSP;
PUSHSTACKi(PERLSI_MAGIC);
PUSHMARK(SP);
EXTEND(SP,1+num);
- PUSHs(SvTIED_obj((SV*)av, mg));
+ PUSHs(SvTIED_obj(MUTABLE_SV(av), mg));
while (num-- > 0) {
PUSHs(&PL_sv_undef);
}
return;
}
+ if (num <= 0)
+ return;
if (!AvREAL(av) && AvREIFY(av))
av_reify(av);
i = AvARRAY(av) - AvALLOC(av);
AvMAX(av) += i;
AvFILLp(av) += i;
- SvPVX(av) = (char*)(AvARRAY(av) - i);
+ AvARRAY(av) = AvARRAY(av) - i;
}
if (num) {
- i = AvFILLp(av);
+ register SV **ary;
+ const I32 i = AvFILLp(av);
/* Create extra elements */
- slide = i > 0 ? i : 0;
+ const I32 slide = i > 0 ? i : 0;
num += slide;
av_extend(av, i + num);
AvFILLp(av) += num;
/* Make extra elements into a buffer */
AvMAX(av) -= slide;
AvFILLp(av) -= slide;
- SvPVX(av) = (char*)(AvARRAY(av) + slide);
+ AvARRAY(av) = AvARRAY(av) + slide;
}
}
/*
=for apidoc av_shift
-Shifts an SV off the beginning of the array.
+Shifts an SV off the beginning of the array. Returns C<&PL_sv_undef> if the
+array is empty.
=cut
*/
SV *
Perl_av_shift(pTHX_ register AV *av)
{
+ dVAR;
SV *retval;
MAGIC* mg;
- if (!av || AvFILL(av) < 0)
- return &PL_sv_undef;
+ PERL_ARGS_ASSERT_AV_SHIFT;
+ assert(SvTYPE(av) == SVt_PVAV);
+
if (SvREADONLY(av))
- Perl_croak(aTHX_ PL_no_modify);
- if ((mg = SvTIED_mg((SV*)av, 'P'))) {
+ Perl_croak(aTHX_ "%s", PL_no_modify);
+ if ((mg = SvTIED_mg((const SV *)av, PERL_MAGIC_tied))) {
dSP;
PUSHSTACKi(PERLSI_MAGIC);
PUSHMARK(SP);
- XPUSHs(SvTIED_obj((SV*)av, mg));
+ XPUSHs(SvTIED_obj(MUTABLE_SV(av), mg));
PUTBACK;
ENTER;
if (call_method("SHIFT", G_SCALAR)) {
POPSTACK;
return retval;
}
+ if (AvFILL(av) < 0)
+ return &PL_sv_undef;
retval = *AvARRAY(av);
if (AvREAL(av))
*AvARRAY(av) = &PL_sv_undef;
- SvPVX(av) = (char*)(AvARRAY(av) + 1);
+ AvARRAY(av) = AvARRAY(av) + 1;
AvMAX(av)--;
AvFILLp(av)--;
if (SvSMAGICAL(av))
- mg_set((SV*)av);
+ mg_set(MUTABLE_SV(av));
return retval;
}
/*
=for apidoc av_len
-Returns the highest index in the array. Returns -1 if the array is
-empty.
+Returns the highest index in the array. The number of elements in the
+array is C<av_len(av) + 1>. Returns -1 if the array is empty.
=cut
*/
I32
-Perl_av_len(pTHX_ register AV *av)
+Perl_av_len(pTHX_ AV *av)
{
+ PERL_ARGS_ASSERT_AV_LEN;
+ assert(SvTYPE(av) == SVt_PVAV);
+
return AvFILL(av);
}
/*
=for apidoc av_fill
-Ensure than an array has a given number of elements, equivalent to
+Set the highest index in the array to the given number, equivalent to
Perl's C<$#array = $fill;>.
+The number of elements in the an array will be C<fill + 1> after
+av_fill() returns. If the array was previously shorter then the
+additional elements appended are set to C<PL_sv_undef>. If the array
+was longer, then the excess elements are freed. C<av_fill(av, -1)> is
+the same as C<av_clear(av)>.
+
=cut
*/
void
Perl_av_fill(pTHX_ register AV *av, I32 fill)
{
+ dVAR;
MAGIC *mg;
- if (!av)
- Perl_croak(aTHX_ "panic: null array");
+
+ PERL_ARGS_ASSERT_AV_FILL;
+ assert(SvTYPE(av) == SVt_PVAV);
+
if (fill < 0)
fill = -1;
- if ((mg = SvTIED_mg((SV*)av, 'P'))) {
+ if ((mg = SvTIED_mg((const SV *)av, PERL_MAGIC_tied))) {
dSP;
ENTER;
SAVETMPS;
PUSHSTACKi(PERLSI_MAGIC);
PUSHMARK(SP);
EXTEND(SP,2);
- PUSHs(SvTIED_obj((SV*)av, mg));
- PUSHs(sv_2mortal(newSViv(fill+1)));
+ PUSHs(SvTIED_obj(MUTABLE_SV(av), mg));
+ mPUSHi(fill + 1);
PUTBACK;
call_method("STORESIZE", G_SCALAR|G_DISCARD);
POPSTACK;
}
if (fill <= AvMAX(av)) {
I32 key = AvFILLp(av);
- SV** ary = AvARRAY(av);
+ SV** const ary = AvARRAY(av);
if (AvREAL(av)) {
while (key > fill) {
AvFILLp(av) = fill;
if (SvSMAGICAL(av))
- mg_set((SV*)av);
+ mg_set(MUTABLE_SV(av));
}
else
(void)av_store(av,fill,&PL_sv_undef);
=for apidoc av_delete
Deletes the element indexed by C<key> from the array. Returns the
-deleted element. C<flags> is currently ignored.
+deleted element. If C<flags> equals C<G_DISCARD>, the element is freed
+and null is returned.
=cut
*/
SV *
Perl_av_delete(pTHX_ AV *av, I32 key, I32 flags)
{
+ dVAR;
SV *sv;
- if (!av)
- return Nullsv;
+ PERL_ARGS_ASSERT_AV_DELETE;
+ assert(SvTYPE(av) == SVt_PVAV);
+
if (SvREADONLY(av))
- Perl_croak(aTHX_ PL_no_modify);
+ Perl_croak(aTHX_ "%s", PL_no_modify);
+
+ if (SvRMAGICAL(av)) {
+ const MAGIC * const tied_magic
+ = mg_find((const SV *)av, PERL_MAGIC_tied);
+ if ((tied_magic || mg_find((const SV *)av, PERL_MAGIC_regdata))) {
+ /* Handle negative array indices 20020222 MJD */
+ SV **svp;
+ if (key < 0) {
+ unsigned adjust_index = 1;
+ if (tied_magic) {
+ SV * const * const negative_indices_glob =
+ hv_fetch(SvSTASH(SvRV(SvTIED_obj(MUTABLE_SV(av),
+ tied_magic))),
+ NEGATIVE_INDICES_VAR, 16, 0);
+ if (negative_indices_glob
+ && SvTRUE(GvSV(*negative_indices_glob)))
+ adjust_index = 0;
+ }
+ if (adjust_index) {
+ key += AvFILL(av) + 1;
+ if (key < 0)
+ return NULL;
+ }
+ }
+ svp = av_fetch(av, key, TRUE);
+ if (svp) {
+ sv = *svp;
+ mg_clear(sv);
+ if (mg_find(sv, PERL_MAGIC_tiedelem)) {
+ sv_unmagic(sv, PERL_MAGIC_tiedelem); /* No longer an element */
+ return sv;
+ }
+ return NULL;
+ }
+ }
+ }
+
if (key < 0) {
key += AvFILL(av) + 1;
if (key < 0)
- return Nullsv;
- }
- if (SvRMAGICAL(av)) {
- SV **svp;
- if ((mg_find((SV*)av,'P') || mg_find((SV*)av,'D'))
- && (svp = av_fetch(av, key, TRUE)))
- {
- sv = *svp;
- mg_clear(sv);
- if (mg_find(sv, 'p')) {
- sv_unmagic(sv, 'p'); /* No longer an element */
- return sv;
- }
- return Nullsv; /* element cannot be deleted */
- }
+ return NULL;
}
+
if (key > AvFILLp(av))
- return Nullsv;
+ return NULL;
else {
+ if (!AvREAL(av) && AvREIFY(av))
+ av_reify(av);
sv = AvARRAY(av)[key];
if (key == AvFILLp(av)) {
+ AvARRAY(av)[key] = &PL_sv_undef;
do {
AvFILLp(av)--;
} while (--key >= 0 && AvARRAY(av)[key] == &PL_sv_undef);
else
AvARRAY(av)[key] = &PL_sv_undef;
if (SvSMAGICAL(av))
- mg_set((SV*)av);
+ mg_set(MUTABLE_SV(av));
}
if (flags & G_DISCARD) {
SvREFCNT_dec(sv);
- sv = Nullsv;
+ sv = NULL;
}
+ else if (AvREAL(av))
+ sv = sv_2mortal(sv);
return sv;
}
bool
Perl_av_exists(pTHX_ AV *av, I32 key)
{
- if (!av)
- return FALSE;
+ dVAR;
+ PERL_ARGS_ASSERT_AV_EXISTS;
+ assert(SvTYPE(av) == SVt_PVAV);
+
+ if (SvRMAGICAL(av)) {
+ const MAGIC * const tied_magic
+ = mg_find((const SV *)av, PERL_MAGIC_tied);
+ if (tied_magic || mg_find((const SV *)av, PERL_MAGIC_regdata)) {
+ SV * const sv = sv_newmortal();
+ MAGIC *mg;
+ /* Handle negative array indices 20020222 MJD */
+ if (key < 0) {
+ unsigned adjust_index = 1;
+ if (tied_magic) {
+ SV * const * const negative_indices_glob =
+ hv_fetch(SvSTASH(SvRV(SvTIED_obj(MUTABLE_SV(av),
+ tied_magic))),
+ NEGATIVE_INDICES_VAR, 16, 0);
+ if (negative_indices_glob
+ && SvTRUE(GvSV(*negative_indices_glob)))
+ adjust_index = 0;
+ }
+ if (adjust_index) {
+ key += AvFILL(av) + 1;
+ if (key < 0)
+ return FALSE;
+ }
+ }
+
+ mg_copy(MUTABLE_SV(av), sv, 0, key);
+ mg = mg_find(sv, PERL_MAGIC_tiedelem);
+ if (mg) {
+ magic_existspack(sv, mg);
+ return cBOOL(SvTRUE(sv));
+ }
+
+ }
+ }
+
if (key < 0) {
key += AvFILL(av) + 1;
if (key < 0)
return FALSE;
}
- if (SvRMAGICAL(av)) {
- if (mg_find((SV*)av,'P') || mg_find((SV*)av,'D')) {
- SV *sv = sv_newmortal();
- MAGIC *mg;
-
- mg_copy((SV*)av, sv, 0, key);
- mg = mg_find(sv, 'p');
- if (mg) {
- magic_existspack(sv, mg);
- return SvTRUE(sv);
- }
- }
- }
+
if (key <= AvFILLp(av) && AvARRAY(av)[key] != &PL_sv_undef
&& AvARRAY(av)[key])
{
return FALSE;
}
-/* AVHV: Support for treating arrays as if they were hashes. The
- * first element of the array should be a hash reference that maps
- * hash keys to array indices.
- */
+static MAGIC *
+S_get_aux_mg(pTHX_ AV *av) {
+ dVAR;
+ MAGIC *mg;
-STATIC I32
-S_avhv_index_sv(pTHX_ SV* sv)
-{
- I32 index = SvIV(sv);
- if (index < 1)
- Perl_croak(aTHX_ "Bad index while coercing array into hash");
- return index;
-}
+ PERL_ARGS_ASSERT_GET_AUX_MG;
+ assert(SvTYPE(av) == SVt_PVAV);
-STATIC I32
-S_avhv_index(pTHX_ AV *av, SV *keysv, U32 hash)
-{
- HV *keys;
- HE *he;
- STRLEN n_a;
-
- keys = avhv_keys(av);
- he = hv_fetch_ent(keys, keysv, FALSE, hash);
- if (!he)
- Perl_croak(aTHX_ "No such pseudo-hash field \"%s\"", SvPV(keysv,n_a));
- return avhv_index_sv(HeVAL(he));
-}
+ mg = mg_find((const SV *)av, PERL_MAGIC_arylen_p);
-HV*
-Perl_avhv_keys(pTHX_ AV *av)
-{
- SV **keysp = av_fetch(av, 0, FALSE);
- if (keysp) {
- SV *sv = *keysp;
- if (SvGMAGICAL(sv))
- mg_get(sv);
- if (SvROK(sv)) {
- sv = SvRV(sv);
- if (SvTYPE(sv) == SVt_PVHV)
- return (HV*)sv;
- }
+ if (!mg) {
+ mg = sv_magicext(MUTABLE_SV(av), 0, PERL_MAGIC_arylen_p,
+ &PL_vtbl_arylen_p, 0, 0);
+ assert(mg);
+ /* sv_magicext won't set this for us because we pass in a NULL obj */
+ mg->mg_flags |= MGf_REFCOUNTED;
}
- Perl_croak(aTHX_ "Can't coerce array into hash");
- return Nullhv;
+ return mg;
}
-SV**
-Perl_avhv_store_ent(pTHX_ AV *av, SV *keysv, SV *val, U32 hash)
-{
- return av_store(av, avhv_index(av, keysv, hash), val);
-}
+SV **
+Perl_av_arylen_p(pTHX_ AV *av) {
+ MAGIC *const mg = get_aux_mg(av);
-SV**
-Perl_avhv_fetch_ent(pTHX_ AV *av, SV *keysv, I32 lval, U32 hash)
-{
- return av_fetch(av, avhv_index(av, keysv, hash), lval);
-}
+ PERL_ARGS_ASSERT_AV_ARYLEN_P;
+ assert(SvTYPE(av) == SVt_PVAV);
-SV *
-Perl_avhv_delete_ent(pTHX_ AV *av, SV *keysv, I32 flags, U32 hash)
-{
- HV *keys = avhv_keys(av);
- HE *he;
-
- he = hv_fetch_ent(keys, keysv, FALSE, hash);
- if (!he || !SvOK(HeVAL(he)))
- return Nullsv;
-
- return av_delete(av, avhv_index_sv(HeVAL(he)), flags);
+ return &(mg->mg_obj);
}
-/* Check for the existence of an element named by a given key.
- *
- */
-bool
-Perl_avhv_exists_ent(pTHX_ AV *av, SV *keysv, U32 hash)
-{
- HV *keys = avhv_keys(av);
- HE *he;
-
- he = hv_fetch_ent(keys, keysv, FALSE, hash);
- if (!he || !SvOK(HeVAL(he)))
- return FALSE;
+IV *
+Perl_av_iter_p(pTHX_ AV *av) {
+ MAGIC *const mg = get_aux_mg(av);
- return av_exists(av, avhv_index_sv(HeVAL(he)));
-}
+ PERL_ARGS_ASSERT_AV_ITER_P;
+ assert(SvTYPE(av) == SVt_PVAV);
-HE *
-Perl_avhv_iternext(pTHX_ AV *av)
-{
- HV *keys = avhv_keys(av);
- return hv_iternext(keys);
+#if IVSIZE == I32SIZE
+ return (IV *)&(mg->mg_len);
+#else
+ if (!mg->mg_ptr) {
+ IV *temp;
+ mg->mg_len = IVSIZE;
+ Newxz(temp, 1, IV);
+ mg->mg_ptr = (char *) temp;
+ }
+ return (IV *)mg->mg_ptr;
+#endif
}
-SV *
-Perl_avhv_iterval(pTHX_ AV *av, register HE *entry)
-{
- SV *sv = hv_iterval(avhv_keys(av), entry);
- return *av_fetch(av, avhv_index_sv(sv), TRUE);
-}
+/*
+ * Local variables:
+ * c-indentation-style: bsd
+ * c-basic-offset: 4
+ * indent-tabs-mode: t
+ * End:
+ *
+ * ex: set ts=8 sts=4 sw=4 noet:
+ */
https://perl5.git.perl.org / perl5.git / blobdiff