/* av.c
*
- * Copyright (c) 1991-1997, Larry Wall
+ * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
+ * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 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.
* meant that things should remain where they had set them)." --Treebeard
*/
+/*
+=head1 Array Manipulation Functions
+*/
+
#include "EXTERN.h"
+#define PERL_IN_AV_C
#include "perl.h"
void
-av_reify(AV *av)
+Perl_av_reify(pTHX_ AV *av)
{
+ dVAR;
I32 key;
- SV* sv;
+
+ assert(av);
if (AvREAL(av))
return;
#ifdef DEBUGGING
- if (SvTIED_mg((SV*)av, 'P'))
- warn("av_reify called on tied array");
+ if (SvTIED_mg((SV*)av, PERL_MAGIC_tied) && ckWARN_d(WARN_DEBUGGING))
+ Perl_warner(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) {
- dTHR;
+ if (sv != &PL_sv_undef)
(void)SvREFCNT_inc(sv);
- }
}
key = AvARRAY(av) - AvALLOC(av);
while (key)
AvREAL_on(av);
}
+/*
+=for apidoc av_extend
+
+Pre-extend an array. The C<key> is the index to which the array should be
+extended.
+
+=cut
+*/
+
void
-av_extend(AV *av, I32 key)
+Perl_av_extend(pTHX_ AV *av, I32 key)
{
- dTHR; /* only necessary if we have to extend stack */
+ dVAR;
MAGIC *mg;
- if (mg = SvTIED_mg((SV*)av, 'P')) {
+
+ assert(av);
+
+ mg = SvTIED_mg((SV*)av, PERL_MAGIC_tied);
+ if (mg) {
dSP;
ENTER;
SAVETMPS;
PUSHs(SvTIED_obj((SV*)av, mg));
PUSHs(sv_2mortal(newSViv(key+1)));
PUTBACK;
- perl_call_method("EXTEND", G_SCALAR|G_DISCARD);
+ call_method("EXTEND", G_SCALAR|G_DISCARD);
POPSTACK;
FREETMPS;
LEAVE;
tmp = AvARRAY(av) - AvALLOC(av);
Move(AvARRAY(av), AvALLOC(av), AvFILLp(av)+1, SV*);
AvMAX(av) += tmp;
- SvPVX(av) = (char*)AvALLOC(av);
+ SvPV_set(av, (char*)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
- U32 bytes;
+#if !defined(STRANGE_MALLOC) && !defined(MYMALLOC)
+ MEM_SIZE bytes;
+ IV itmp;
#endif
-#if defined(MYMALLOC) && !defined(PURIFY) && !defined(LEAKTEST)
+#ifdef MYMALLOC
newmax = malloced_size((void*)AvALLOC(av))/sizeof(SV*) - 1;
if (key <= newmax)
#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*);
#define MALLOC_OVERHEAD 16
- tmp = MALLOC_OVERHEAD;
- while (tmp - MALLOC_OVERHEAD < bytes)
- tmp += tmp;
- tmp -= MALLOC_OVERHEAD;
- tmp /= sizeof(SV*);
- assert(tmp > newmax);
- newmax = tmp - 1;
- New(2,ary, newmax+1, SV*);
+ itmp = MALLOC_OVERHEAD;
+ while ((MEM_SIZE)(itmp - MALLOC_OVERHEAD) < bytes)
+ itmp += itmp;
+ itmp -= MALLOC_OVERHEAD;
+ itmp /= sizeof(SV*);
+ assert(itmp > newmax);
+ newmax = itmp - 1;
+ assert(newmax >= AvMAX(av));
+ 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*));
Safefree(AvALLOC(av));
AvALLOC(av) = ary;
#endif
+#ifdef MYMALLOC
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);
+ SvPV_set(av, (char*)AvALLOC(av));
AvMAX(av) = newmax;
}
}
}
+/*
+=for apidoc av_fetch
+
+Returns the SV at the specified index in the array. The C<key> is the
+index. If C<lval> is set then the fetch will be part of a store. Check
+that the return value is non-null before dereferencing it to a C<SV*>.
+
+See L<perlguts/"Understanding the Magic of Tied Hashes and Arrays"> for
+more information on how to use this function on tied arrays.
+
+=cut
+*/
+
SV**
-av_fetch(register AV *av, I32 key, I32 lval)
+Perl_av_fetch(pTHX_ register AV *av, I32 key, I32 lval)
{
+ dVAR;
SV *sv;
- if (!av)
- return 0;
+ assert(av);
+
+ if (SvRMAGICAL(av)) {
+ const MAGIC * const tied_magic = mg_find((SV*)av, PERL_MAGIC_tied);
+ if (tied_magic || mg_find((SV*)av, PERL_MAGIC_regdata)) {
+ U32 adjust_index = 1;
+
+ if (tied_magic && key < 0) {
+ /* Handle negative array indices 20020222 MJD */
+ SV * const * const negative_indices_glob =
+ hv_fetch(SvSTASH(SvRV(SvTIED_obj((SV *)av,
+ tied_magic))),
+ NEGATIVE_INDICES_VAR, 16, 0);
+
+ if (negative_indices_glob
+ && SvTRUE(GvSV(*negative_indices_glob)))
+ adjust_index = 0;
+ }
+
+ if (key < 0 && adjust_index) {
+ key += AvFILL(av) + 1;
+ if (key < 0)
+ return 0;
+ }
+
+ sv = sv_newmortal();
+ sv_upgrade(sv, SVt_PVLV);
+ mg_copy((SV*)av, sv, 0, key);
+ LvTYPE(sv) = 't';
+ LvTARG(sv) = sv; /* fake (SV**) */
+ return &(LvTARG(sv));
+ }
+ }
if (key < 0) {
key += AvFILL(av) + 1;
return 0;
}
- if (SvRMAGICAL(av)) {
- if (mg_find((SV*)av,'P') || mg_find((SV*)av,'D')) {
- dTHR;
- sv = sv_newmortal();
- mg_copy((SV*)av, sv, 0, key);
- PL_av_fetch_sv = sv;
- return &PL_av_fetch_sv;
- }
- }
-
if (key > AvFILLp(av)) {
if (!lval)
return 0;
- if (AvREALISH(av))
- sv = NEWSV(5,0);
- else
- sv = sv_newmortal();
+ sv = newSV(0);
return av_store(av,key,sv);
}
if (AvARRAY(av)[key] == &PL_sv_undef) {
emptyness:
if (lval) {
- sv = NEWSV(6,0);
+ sv = newSV(0);
return av_store(av,key,sv);
}
return 0;
}
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;
}
return &AvARRAY(av)[key];
}
+/*
+=for apidoc av_store
+
+Stores an SV in an array. The array index is specified as C<key>. The
+return value will be NULL if the operation failed or if the value did not
+need to be actually stored within the array (as in the case of tied
+arrays). Otherwise it can be dereferenced to get the original C<SV*>. Note
+that the caller is responsible for suitably incrementing the reference
+count of C<val> before the call, and decrementing it if the function
+returned NULL.
+
+See L<perlguts/"Understanding the Magic of Tied Hashes and Arrays"> for
+more information on how to use this function on tied arrays.
+
+=cut
+*/
+
SV**
-av_store(register AV *av, I32 key, SV *val)
+Perl_av_store(pTHX_ register AV *av, I32 key, SV *val)
{
+ dVAR;
SV** ary;
- U32 fill;
+ assert(av);
- if (!av)
- return 0;
if (!val)
val = &PL_sv_undef;
+ if (SvRMAGICAL(av)) {
+ const MAGIC * const tied_magic = mg_find((SV*)av, PERL_MAGIC_tied);
+ if (tied_magic) {
+ /* Handle negative array indices 20020222 MJD */
+ if (key < 0) {
+ unsigned adjust_index = 1;
+ SV * const * const negative_indices_glob =
+ hv_fetch(SvSTASH(SvRV(SvTIED_obj((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((SV*)av, val, 0, key);
+ }
+ return 0;
+ }
+ }
+
+
if (key < 0) {
key += AvFILL(av) + 1;
if (key < 0)
}
if (SvREADONLY(av) && key >= AvFILL(av))
- croak(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_ PL_no_modify);
if (!AvREAL(av) && AvREIFY(av))
av_reify(av);
ary = AvARRAY(av);
if (AvFILLp(av) < key) {
if (!AvREAL(av)) {
- dTHR;
if (av == PL_curstack && key > PL_stack_sp - PL_stack_base)
PL_stack_sp = PL_stack_base + key; /* XPUSH in disguise */
do
ary[key] = val;
if (SvSMAGICAL(av)) {
if (val != &PL_sv_undef) {
- MAGIC* mg = SvMAGIC(av);
+ const MAGIC* const mg = SvMAGIC(av);
sv_magic(val, (SV*)av, toLOWER(mg->mg_type), 0, key);
}
mg_set((SV*)av);
return &ary[key];
}
+/*
+=for apidoc newAV
+
+Creates a new AV. The reference count is set to 1.
+
+=cut
+*/
+
AV *
-newAV(void)
+Perl_newAV(pTHX)
{
- register AV *av;
+ register AV * const av = (AV*)newSV(0);
- av = (AV*)NEWSV(3,0);
sv_upgrade((SV *)av, SVt_PVAV);
- AvREAL_on(av);
+ /* sv_upgrade does AvREAL_only() */
AvALLOC(av) = 0;
- SvPVX(av) = 0;
+ SvPV_set(av, NULL);
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
+into the array, so they may be freed after the call to av_make. The new AV
+will have a reference count of 1.
+
+=cut
+*/
+
AV *
-av_make(register I32 size, register SV **strp)
+Perl_av_make(pTHX_ register I32 size, register SV **strp)
{
- register AV *av;
- register I32 i;
- register SV** ary;
+ register AV * const av = (AV*)newSV(0);
- 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*);
+ /* sv_upgrade does AvREAL_only() */
+ 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;
+ SvPV_set(av, (char*)ary);
AvFILLp(av) = size - 1;
AvMAX(av) = size - 1;
for (i = 0; i < size; i++) {
assert (*strp);
- ary[i] = NEWSV(7,0);
+ ary[i] = newSV(0);
sv_setsv(ary[i], *strp);
strp++;
}
return av;
}
-AV *
-av_fake(register I32 size, register SV **strp)
-{
- register AV *av;
- register SV** ary;
+/*
+=for apidoc av_clear
- 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;
-}
+Clears an array, making it empty. Does not free the memory used by the
+array itself.
+
+=cut
+*/
void
-av_clear(register AV *av)
+Perl_av_clear(pTHX_ register AV *av)
{
+ dVAR;
register I32 key;
- SV** ary;
+ assert(av);
#ifdef DEBUGGING
- if (SvREFCNT(av) <= 0) {
- warn("Attempt to clear deleted array");
+ if (SvREFCNT(av) == 0 && ckWARN_d(WARN_DEBUGGING)) {
+ Perl_warner(aTHX_ packWARN(WARN_DEBUGGING), "Attempt to clear deleted array");
}
#endif
- if (!av)
- return;
- /*SUPPRESS 560*/
if (SvREADONLY(av))
- croak(no_modify);
+ Perl_croak(aTHX_ PL_no_modify);
/* Give any tie a chance to cleanup first */
if (SvRMAGICAL(av))
return;
if (AvREAL(av)) {
- ary = AvARRAY(av);
+ SV** const ary = AvARRAY(av);
key = AvFILLp(av) + 1;
while (key) {
- SvREFCNT_dec(ary[--key]);
+ SV * const sv = ary[--key];
+ /* undef the slot before freeing the value, because a
+ * destructor might try to modify this arrray */
ary[key] = &PL_sv_undef;
+ SvREFCNT_dec(sv);
}
}
- if (key = AvARRAY(av) - AvALLOC(av)) {
+ if ((key = AvARRAY(av) - AvALLOC(av))) {
AvMAX(av) += key;
- SvPVX(av) = (char*)AvALLOC(av);
+ SvPV_set(av, (char*)AvALLOC(av));
}
AvFILLp(av) = -1;
}
+/*
+=for apidoc av_undef
+
+Undefines the array. Frees the memory used by the array itself.
+
+=cut
+*/
+
void
-av_undef(register AV *av)
+Perl_av_undef(pTHX_ register AV *av)
{
- register I32 key;
-
- if (!av)
- return;
- /*SUPPRESS 560*/
+ assert(av);
/* Give any tie a chance to cleanup first */
- if (SvTIED_mg((SV*)av, 'P'))
+ if (SvTIED_mg((SV*)av, PERL_MAGIC_tied))
av_fill(av, -1); /* mg_clear() ? */
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;
+ SvPV_set(av, NULL);
AvMAX(av) = AvFILLp(av) = -1;
- if (AvARYLEN(av)) {
- SvREFCNT_dec(AvARYLEN(av));
- AvARYLEN(av) = 0;
- }
}
+/*
+=for apidoc av_push
+
+Pushes an SV onto the end of the array. The array will grow automatically
+to accommodate the addition.
+
+=cut
+*/
+
void
-av_push(register AV *av, SV *val)
+Perl_av_push(pTHX_ register AV *av, SV *val)
{
+ dVAR;
MAGIC *mg;
- if (!av)
- return;
+ assert(av);
+
if (SvREADONLY(av))
- croak(no_modify);
+ Perl_croak(aTHX_ PL_no_modify);
- if (mg = SvTIED_mg((SV*)av, 'P')) {
+ if ((mg = SvTIED_mg((SV*)av, PERL_MAGIC_tied))) {
dSP;
PUSHSTACKi(PERLSI_MAGIC);
PUSHMARK(SP);
PUSHs(val);
PUTBACK;
ENTER;
- perl_call_method("PUSH", G_SCALAR|G_DISCARD);
+ call_method("PUSH", G_SCALAR|G_DISCARD);
LEAVE;
POPSTACK;
return;
av_store(av,AvFILLp(av)+1,val);
}
+/*
+=for apidoc av_pop
+
+Pops an SV off the end of the array. Returns C<&PL_sv_undef> if the array
+is empty.
+
+=cut
+*/
+
SV *
-av_pop(register AV *av)
+Perl_av_pop(pTHX_ register AV *av)
{
+ dVAR;
SV *retval;
MAGIC* mg;
- if (!av || AvFILL(av) < 0)
- return &PL_sv_undef;
+ assert(av);
+
if (SvREADONLY(av))
- croak(no_modify);
- if (mg = SvTIED_mg((SV*)av, 'P')) {
+ Perl_croak(aTHX_ PL_no_modify);
+ if ((mg = SvTIED_mg((SV*)av, PERL_MAGIC_tied))) {
dSP;
PUSHSTACKi(PERLSI_MAGIC);
PUSHMARK(SP);
XPUSHs(SvTIED_obj((SV*)av, mg));
PUTBACK;
ENTER;
- if (perl_call_method("POP", G_SCALAR)) {
+ if (call_method("POP", G_SCALAR)) {
retval = newSVsv(*PL_stack_sp--);
} else {
retval = &PL_sv_undef;
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))
return retval;
}
+/*
+=for apidoc av_unshift
+
+Unshift the given number of C<undef> values onto the beginning of the
+array. The array will grow automatically to accommodate the addition. You
+must then use C<av_store> to assign values to these new elements.
+
+=cut
+*/
+
void
-av_unshift(register AV *av, register I32 num)
+Perl_av_unshift(pTHX_ register AV *av, register I32 num)
{
+ dVAR;
register I32 i;
- register SV **ary;
MAGIC* mg;
- if (!av || num <= 0)
- return;
+ assert(av);
+
if (SvREADONLY(av))
- croak(no_modify);
+ Perl_croak(aTHX_ PL_no_modify);
- if (mg = SvTIED_mg((SV*)av, 'P')) {
+ if ((mg = SvTIED_mg((SV*)av, PERL_MAGIC_tied))) {
dSP;
PUSHSTACKi(PERLSI_MAGIC);
PUSHMARK(SP);
}
PUTBACK;
ENTER;
- perl_call_method("UNSHIFT", G_SCALAR|G_DISCARD);
+ call_method("UNSHIFT", G_SCALAR|G_DISCARD);
LEAVE;
POPSTACK;
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);
+ SvPV_set(av, (char*)(AvARRAY(av) - i));
}
if (num) {
+ register SV **ary;
+ I32 slide;
i = AvFILLp(av);
+ /* Create extra elements */
+ slide = i > 0 ? i : 0;
+ num += slide;
av_extend(av, i + num);
AvFILLp(av) += num;
ary = AvARRAY(av);
do {
ary[--num] = &PL_sv_undef;
} while (num);
+ /* Make extra elements into a buffer */
+ AvMAX(av) -= slide;
+ AvFILLp(av) -= slide;
+ SvPV_set(av, (char*)(AvARRAY(av) + slide));
}
}
+/*
+=for apidoc av_shift
+
+Shifts an SV off the beginning of the array.
+
+=cut
+*/
+
SV *
-av_shift(register AV *av)
+Perl_av_shift(pTHX_ register AV *av)
{
+ dVAR;
SV *retval;
MAGIC* mg;
- if (!av || AvFILL(av) < 0)
- return &PL_sv_undef;
+ assert(av);
+
if (SvREADONLY(av))
- croak(no_modify);
- if (mg = SvTIED_mg((SV*)av, 'P')) {
+ Perl_croak(aTHX_ PL_no_modify);
+ if ((mg = SvTIED_mg((SV*)av, PERL_MAGIC_tied))) {
dSP;
PUSHSTACKi(PERLSI_MAGIC);
PUSHMARK(SP);
XPUSHs(SvTIED_obj((SV*)av, mg));
PUTBACK;
ENTER;
- if (perl_call_method("SHIFT", G_SCALAR)) {
+ if (call_method("SHIFT", G_SCALAR)) {
retval = newSVsv(*PL_stack_sp--);
} else {
retval = &PL_sv_undef;
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);
+ SvPV_set(av, (char*)(AvARRAY(av) + 1));
AvMAX(av)--;
AvFILLp(av)--;
if (SvSMAGICAL(av))
return retval;
}
+/*
+=for apidoc av_len
+
+Returns the highest index in the array. Returns -1 if the array is
+empty.
+
+=cut
+*/
+
I32
-av_len(register AV *av)
+Perl_av_len(pTHX_ register const AV *av)
{
+ assert(av);
return AvFILL(av);
}
+/*
+=for apidoc av_fill
+
+Ensure than an array has a given number of elements, equivalent to
+Perl's C<$#array = $fill;>.
+
+=cut
+*/
void
-av_fill(register AV *av, I32 fill)
+Perl_av_fill(pTHX_ register AV *av, I32 fill)
{
+ dVAR;
MAGIC *mg;
- if (!av)
- croak("panic: null array");
+
+ assert(av);
+
if (fill < 0)
fill = -1;
- if (mg = SvTIED_mg((SV*)av, 'P')) {
+ if ((mg = SvTIED_mg((SV*)av, PERL_MAGIC_tied))) {
dSP;
ENTER;
SAVETMPS;
PUSHs(SvTIED_obj((SV*)av, mg));
PUSHs(sv_2mortal(newSViv(fill+1)));
PUTBACK;
- perl_call_method("STORESIZE", G_SCALAR|G_DISCARD);
+ call_method("STORESIZE", G_SCALAR|G_DISCARD);
POPSTACK;
FREETMPS;
LEAVE;
}
if (fill <= AvMAX(av)) {
I32 key = AvFILLp(av);
- SV** ary = AvARRAY(av);
+ SV** const ary = AvARRAY(av);
if (AvREAL(av)) {
while (key > fill) {
(void)av_store(av,fill,&PL_sv_undef);
}
+/*
+=for apidoc av_delete
-/* 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.
- */
+Deletes the element indexed by C<key> from the array. Returns the
+deleted element. If C<flags> equals C<G_DISCARD>, the element is freed
+and null is returned.
-STATIC I32
-avhv_index_sv(SV* sv)
+=cut
+*/
+SV *
+Perl_av_delete(pTHX_ AV *av, I32 key, I32 flags)
{
- I32 index = SvIV(sv);
- if (index < 1)
- croak("Bad index while coercing array into hash");
- return index;
-}
+ dVAR;
+ SV *sv;
-HV*
-avhv_keys(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;
+ assert(av);
+
+ if (SvREADONLY(av))
+ Perl_croak(aTHX_ PL_no_modify);
+
+ if (SvRMAGICAL(av)) {
+ const MAGIC * const tied_magic = mg_find((SV*)av, PERL_MAGIC_tied);
+ if ((tied_magic || mg_find((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((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 NULL;
+ }
+
+ if (key > AvFILLp(av))
+ 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);
+ }
+ if (flags & G_DISCARD) {
+ SvREFCNT_dec(sv);
+ sv = NULL;
}
- croak("Can't coerce array into hash");
- return Nullhv;
+ else if (AvREAL(av))
+ sv = sv_2mortal(sv);
+ return sv;
}
-SV**
-avhv_fetch_ent(AV *av, SV *keysv, I32 lval, U32 hash)
-{
- SV **indsvp;
- HV *keys = avhv_keys(av);
- HE *he;
-
- he = hv_fetch_ent(keys, keysv, FALSE, hash);
- if (!he)
- croak("No such array field");
- return av_fetch(av, avhv_index_sv(HeVAL(he)), lval);
-}
+/*
+=for apidoc av_exists
+
+Returns true if the element indexed by C<key> has been initialized.
+
+This relies on the fact that uninitialized array elements are set to
+C<&PL_sv_undef>.
+=cut
+*/
bool
-avhv_exists_ent(AV *av, SV *keysv, U32 hash)
+Perl_av_exists(pTHX_ AV *av, I32 key)
{
- HV *keys = avhv_keys(av);
- return hv_exists_ent(keys, keysv, hash);
-}
+ dVAR;
+ assert(av);
-HE *
-avhv_iternext(AV *av)
-{
- HV *keys = avhv_keys(av);
- return hv_iternext(keys);
+ if (SvRMAGICAL(av)) {
+ const MAGIC * const tied_magic = mg_find((SV*)av, PERL_MAGIC_tied);
+ if (tied_magic || mg_find((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((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((SV*)av, sv, 0, key);
+ mg = mg_find(sv, PERL_MAGIC_tiedelem);
+ if (mg) {
+ magic_existspack(sv, mg);
+ return (bool)SvTRUE(sv);
+ }
+
+ }
+ }
+
+ if (key < 0) {
+ key += AvFILL(av) + 1;
+ if (key < 0)
+ return FALSE;
+ }
+
+ if (key <= AvFILLp(av) && AvARRAY(av)[key] != &PL_sv_undef
+ && AvARRAY(av)[key])
+ {
+ return TRUE;
+ }
+ else
+ return FALSE;
}
-SV *
-avhv_iterval(AV *av, register HE *entry)
-{
- SV *sv = hv_iterval(avhv_keys(av), entry);
- return *av_fetch(av, avhv_index_sv(sv), TRUE);
+SV **
+Perl_av_arylen_p(pTHX_ AV *av) {
+ dVAR;
+ MAGIC *mg;
+
+ assert(av);
+
+ mg = mg_find((SV*)av, PERL_MAGIC_arylen_p);
+
+ if (!mg) {
+ mg = sv_magicext((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;
+ }
+ return &(mg->mg_obj);
}
+
+/*
+ * 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