*/
/*
- * "...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"]
*/
/*
if (AvREAL(av))
return;
#ifdef DEBUGGING
- if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied) && ckWARN_d(WARN_DEBUGGING))
- Perl_warner(aTHX_ packWARN(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)
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(MUTABLE_SV(av), mg));
- mPUSHi(key + 1);
- PUTBACK;
- call_method("EXTEND", G_SCALAR|G_DISCARD);
- POPSTACK;
- FREETMPS;
- LEAVE;
+ SV *arg1 = sv_newmortal();
+ sv_setiv(arg1, (IV)(key + 1));
+ Perl_magic_methcall(aTHX_ MUTABLE_SV(av), mg, "EXTEND", G_DISCARD, 1,
+ arg1);
return;
}
if (key > AvMAX(av)) {
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(const SV *));
- else
- Safefree(AvALLOC(av));
+ Safefree(AvALLOC(av));
AvALLOC(av) = ary;
#endif
#ifdef Perl_safesysmalloc_size
=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*>.
+index. If lval is true, you are guaranteed to get a real SV back (in case
+it wasn't real before), which you can then modify. 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.
+The rough perl equivalent is C<$myarray[$idx]>.
+
=cut
*/
sv = sv_newmortal();
sv_upgrade(sv, SVt_PVLV);
mg_copy(MUTABLE_SV(av), sv, 0, key);
+ if (!tied_magic) /* for regdata, force leavesub to make copies */
+ SvTEMP_off(sv);
LvTYPE(sv) = 't';
LvTARG(sv) = sv; /* fake (SV**) */
return &(LvTARG(sv));
return NULL;
}
- if (key > AvFILLp(av)) {
- if (!lval)
- return NULL;
- return av_store(av,key,newSV(0));
+ if (key > AvFILLp(av) || AvARRAY(av)[key] == &PL_sv_undef) {
+ emptyness:
+ return lval ? av_store(av,key,newSV(0)) : NULL;
}
- if (AvARRAY(av)[key] == &PL_sv_undef) {
- emptyness:
- if (lval)
- return av_store(av,key,newSV(0));
- return NULL;
- }
- else if (AvREIFY(av)
+
+ if (AvREIFY(av)
&& (!AvARRAY(av)[key] /* eg. @_ could have freed elts */
|| SvIS_FREED(AvARRAY(av)[key]))) {
AvARRAY(av)[key] = &PL_sv_undef; /* 1/2 reify */
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
+arrays). Otherwise, it can be dereferenced
+to get the C<SV*> that was stored
+there (= C<val>)).
+
+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.
+Approximate Perl equivalent: C<$myarray[$key] = $val;>.
+
See L<perlguts/"Understanding the Magic of Tied Hashes and Arrays"> for
more information on how to use this function on tied arrays.
}
if (SvREADONLY(av) && key >= AvFILL(av))
- Perl_croak(aTHX_ "%s", PL_no_modify);
+ Perl_croak_no_modify(aTHX);
if (!AvREAL(av) && AvREIFY(av))
av_reify(av);
SvREFCNT_dec(ary[key]);
ary[key] = val;
if (SvSMAGICAL(av)) {
- const MAGIC* const mg = SvMAGIC(av);
- if (val != &PL_sv_undef) {
+ const MAGIC *mg = SvMAGIC(av);
+ bool set = TRUE;
+ for (; mg; mg = mg->mg_moremagic) {
+ if (!isUPPER(mg->mg_type)) continue;
+ if (val != &PL_sv_undef) {
sv_magic(val, MUTABLE_SV(av), toLOWER(mg->mg_type), 0, key);
+ }
+ if (PL_delaymagic && mg->mg_type == PERL_MAGIC_isa) {
+ PL_delaymagic |= DM_ARRAY_ISA;
+ set = FALSE;
+ }
}
- if (PL_delaymagic && mg->mg_type == PERL_MAGIC_isa)
- PL_delaymagic |= DM_ARRAY;
- else
+ if (set)
mg_set(MUTABLE_SV(av));
}
return &ary[key];
into the array, so they may be freed after the call to av_make. The new AV
will have a reference count of 1.
+Perl equivalent: C<my @new_array = ($scalar1, $scalar2, $scalar3...);>
+
=cut
*/
AvFILLp(av) = AvMAX(av) = size - 1;
for (i = 0; i < size; i++) {
assert (*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(ary[i], *strp);
+ sv_setsv_flags(ary[i], *strp,
+ SV_GMAGIC|SV_DO_COW_SVSETSV|SV_NOSTEAL);
strp++;
}
}
/*
=for apidoc av_clear
-Clears an array, making it empty. Does not free the memory used by the
-array itself.
+Clears an array, making it empty. Does not free the memory the av uses to
+store its list of scalars. If any destructors are triggered as a result,
+the av itself may be freed when this function returns.
+
+Perl equivalent: C<@myarray = ();>.
=cut
*/
{
dVAR;
I32 extra;
+ bool real;
PERL_ARGS_ASSERT_AV_CLEAR;
assert(SvTYPE(av) == SVt_PVAV);
#ifdef DEBUGGING
- if (SvREFCNT(av) == 0 && ckWARN_d(WARN_DEBUGGING)) {
- Perl_warner(aTHX_ packWARN(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 (SvREADONLY(av))
- Perl_croak(aTHX_ "%s", PL_no_modify);
+ Perl_croak_no_modify(aTHX);
/* Give any tie a chance to cleanup first */
if (SvRMAGICAL(av)) {
const MAGIC* const mg = SvMAGIC(av);
if (PL_delaymagic && mg && mg->mg_type == PERL_MAGIC_isa)
- PL_delaymagic |= DM_ARRAY;
+ PL_delaymagic |= DM_ARRAY_ISA;
else
mg_clear(MUTABLE_SV(av));
}
if (AvMAX(av) < 0)
return;
- if (AvREAL(av)) {
+ if ((real = !!AvREAL(av))) {
SV** const ary = AvARRAY(av);
I32 index = AvFILLp(av) + 1;
+ ENTER;
+ SAVEFREESV(SvREFCNT_inc_simple_NN(av));
while (index) {
SV * const sv = ary[--index];
/* undef the slot before freeing the value, because a
AvARRAY(av) = AvALLOC(av);
}
AvFILLp(av) = -1;
-
+ if (real) LEAVE;
}
/*
=for apidoc av_undef
-Undefines the array. Frees the memory used by the array itself.
+Undefines the array. Frees the memory used by the av to store its list of
+scalars. If any destructors are triggered as a result, the av itself may
+be freed.
=cut
*/
void
Perl_av_undef(pTHX_ register AV *av)
{
+ bool real;
+
PERL_ARGS_ASSERT_AV_UNDEF;
assert(SvTYPE(av) == SVt_PVAV);
if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
av_fill(av, -1);
- if (AvREAL(av)) {
+ if ((real = !!AvREAL(av))) {
register I32 key = AvFILLp(av) + 1;
+ ENTER;
+ SAVEFREESV(SvREFCNT_inc_simple_NN(av));
while (key)
SvREFCNT_dec(AvARRAY(av)[--key]);
}
AvMAX(av) = AvFILLp(av) = -1;
if(SvRMAGICAL(av)) mg_clear(MUTABLE_SV(av));
+ if(real) LEAVE;
}
/*
=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. This takes ownership of one reference count.
+
+Perl equivalent: C<push @myarray, $elem;>.
=cut
*/
assert(SvTYPE(av) == SVt_PVAV);
if (SvREADONLY(av))
- Perl_croak(aTHX_ "%s", PL_no_modify);
+ Perl_croak_no_modify(aTHX);
if ((mg = SvTIED_mg((const SV *)av, PERL_MAGIC_tied))) {
- dSP;
- PUSHSTACKi(PERLSI_MAGIC);
- PUSHMARK(SP);
- EXTEND(SP,2);
- PUSHs(SvTIED_obj(MUTABLE_SV(av), mg));
- PUSHs(val);
- PUTBACK;
- ENTER;
- call_method("PUSH", G_SCALAR|G_DISCARD);
- LEAVE;
- POPSTACK;
+ Perl_magic_methcall(aTHX_ MUTABLE_SV(av), mg, "PUSH", G_DISCARD, 1,
+ val);
return;
}
av_store(av,AvFILLp(av)+1,val);
Pops an SV off the end of the array. Returns C<&PL_sv_undef> if the array
is empty.
+Perl equivalent: C<pop(@myarray);>
+
=cut
*/
assert(SvTYPE(av) == SVt_PVAV);
if (SvREADONLY(av))
- Perl_croak(aTHX_ "%s", PL_no_modify);
+ Perl_croak_no_modify(aTHX);
if ((mg = SvTIED_mg((const SV *)av, PERL_MAGIC_tied))) {
- dSP;
- PUSHSTACKi(PERLSI_MAGIC);
- PUSHMARK(SP);
- XPUSHs(SvTIED_obj(MUTABLE_SV(av), mg));
- PUTBACK;
- ENTER;
- if (call_method("POP", G_SCALAR)) {
- retval = newSVsv(*PL_stack_sp--);
- } else {
- retval = &PL_sv_undef;
- }
- LEAVE;
- POPSTACK;
+ retval = Perl_magic_methcall(aTHX_ MUTABLE_SV(av), mg, "POP", 0, 0);
+ if (retval)
+ retval = newSVsv(retval);
return retval;
}
if (AvFILL(av) < 0)
array. The array will grow automatically to accommodate the addition. You
must then use C<av_store> to assign values to these new elements.
+Perl equivalent: C<unshift @myarray, ( (undef) x $n );>
+
=cut
*/
assert(SvTYPE(av) == SVt_PVAV);
if (SvREADONLY(av))
- Perl_croak(aTHX_ "%s", PL_no_modify);
+ Perl_croak_no_modify(aTHX);
if ((mg = SvTIED_mg((const SV *)av, PERL_MAGIC_tied))) {
- dSP;
- PUSHSTACKi(PERLSI_MAGIC);
- PUSHMARK(SP);
- EXTEND(SP,1+num);
- PUSHs(SvTIED_obj(MUTABLE_SV(av), mg));
- while (num-- > 0) {
- PUSHs(&PL_sv_undef);
- }
- PUTBACK;
- ENTER;
- call_method("UNSHIFT", G_SCALAR|G_DISCARD);
- LEAVE;
- POPSTACK;
+ Perl_magic_methcall(aTHX_ MUTABLE_SV(av), mg, "UNSHIFT",
+ G_DISCARD | G_UNDEF_FILL, num);
return;
}
/*
=for apidoc av_shift
-Shifts an SV off the beginning of the array. Returns C<&PL_sv_undef> if the
+Shifts an SV off the beginning of the
+array. Returns C<&PL_sv_undef> if the
array is empty.
+Perl equivalent: C<shift(@myarray);>
+
=cut
*/
assert(SvTYPE(av) == SVt_PVAV);
if (SvREADONLY(av))
- Perl_croak(aTHX_ "%s", PL_no_modify);
+ Perl_croak_no_modify(aTHX);
if ((mg = SvTIED_mg((const SV *)av, PERL_MAGIC_tied))) {
- dSP;
- PUSHSTACKi(PERLSI_MAGIC);
- PUSHMARK(SP);
- XPUSHs(SvTIED_obj(MUTABLE_SV(av), mg));
- PUTBACK;
- ENTER;
- if (call_method("SHIFT", G_SCALAR)) {
- retval = newSVsv(*PL_stack_sp--);
- } else {
- retval = &PL_sv_undef;
- }
- LEAVE;
- POPSTACK;
+ retval = Perl_magic_methcall(aTHX_ MUTABLE_SV(av), mg, "SHIFT", 0, 0);
+ if (retval)
+ retval = newSVsv(retval);
return retval;
}
if (AvFILL(av) < 0)
Returns the highest index in the array. The number of elements in the
array is C<av_len(av) + 1>. Returns -1 if the array is empty.
+The Perl equivalent for this is C<$#myarray>.
+
=cut
*/
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
+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)>.
if (fill < 0)
fill = -1;
if ((mg = SvTIED_mg((const SV *)av, PERL_MAGIC_tied))) {
- dSP;
- ENTER;
- SAVETMPS;
- PUSHSTACKi(PERLSI_MAGIC);
- PUSHMARK(SP);
- EXTEND(SP,2);
- PUSHs(SvTIED_obj(MUTABLE_SV(av), mg));
- mPUSHi(fill + 1);
- PUTBACK;
- call_method("STORESIZE", G_SCALAR|G_DISCARD);
- POPSTACK;
- FREETMPS;
- LEAVE;
+ SV *arg1 = sv_newmortal();
+ sv_setiv(arg1, (IV)(fill + 1));
+ Perl_magic_methcall(aTHX_ MUTABLE_SV(av), mg, "STORESIZE", G_DISCARD,
+ 1, arg1);
return;
}
if (fill <= AvMAX(av)) {
/*
=for apidoc av_delete
-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.
+Deletes the element indexed by C<key> from the array, makes the element mortal,
+and returns it. If C<flags> equals C<G_DISCARD>, the element is freed and null
+is returned. Perl equivalent: C<my $elem = delete($myarray[$idx]);> for the
+non-C<G_DISCARD> version and a void-context C<delete($myarray[$idx]);> for the
+C<G_DISCARD> version.
=cut
*/
assert(SvTYPE(av) == SVt_PVAV);
if (SvREADONLY(av))
- Perl_croak(aTHX_ "%s", PL_no_modify);
+ Perl_croak_no_modify(aTHX);
if (SvRMAGICAL(av)) {
const MAGIC * const tied_magic
This relies on the fact that uninitialized array elements are set to
C<&PL_sv_undef>.
+Perl equivalent: C<exists($myarray[$key])>.
+
=cut
*/
bool
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)) {
+ const MAGIC * const regdata_magic
+ = mg_find((const SV *)av, PERL_MAGIC_regdata);
+ if (tied_magic || regdata_magic) {
SV * const sv = sv_newmortal();
MAGIC *mg;
/* Handle negative array indices 20020222 MJD */
key += AvFILL(av) + 1;
if (key < 0)
return FALSE;
+ else
+ return TRUE;
}
}
+ if(key >= 0 && regdata_magic) {
+ if (key <= AvFILL(av))
+ return TRUE;
+ else
+ return FALSE;
+ }
+
mg_copy(MUTABLE_SV(av), sv, 0, key);
mg = mg_find(sv, PERL_MAGIC_tiedelem);
if (mg) {
magic_existspack(sv, mg);
- return (bool)SvTRUE(sv);
+ return cBOOL(SvTRUE(sv));
}
}
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