passed to this function matches the name of the element. If it does not
match, perl's internal bookkeeping will get out of sync.
-C<flags> can be set to C<SVf_UTF8> if C<name> is a UTF8 string, or
+C<flags> can be set to C<SVf_UTF8> if C<name> is a UTF-8 string, or
the return value of SvUTF8(sv). It can also take the
C<GV_ADDMULTI> flag, which means to pretend that the GV has been
seen before (i.e., suppress "Used once" warnings).
=for apidoc gv_init
-The old form of C<gv_init_pvn()>. It does not work with UTF8 strings, as it
+The old form of C<gv_init_pvn()>. It does not work with UTF-8 strings, as it
has no flags parameter. If the C<multi> parameter is set, the
C<GV_ADDMULTI> flag will be passed to C<gv_init_pvn()>.
case SVt_PVIO:
Perl_croak(aTHX_ "Cannot convert a reference to %s to typeglob",
sv_reftype(has_constant, 0));
+ break;
default: NOOP;
}
return NULL;
case KEY_chdir:
case KEY_chomp: case KEY_chop: case KEY_defined: case KEY_delete:
- case KEY_each : case KEY_eof : case KEY_exec : case KEY_exists:
- case KEY_keys:
+ case KEY_eof : case KEY_exec: case KEY_exists :
case KEY_lstat:
- case KEY_pop:
- case KEY_push:
- case KEY_shift:
- case KEY_splice: case KEY_split:
+ case KEY_split:
case KEY_stat:
case KEY_system:
case KEY_truncate: case KEY_unlink:
- case KEY_unshift:
- case KEY_values:
ampable = FALSE;
}
if (!gv) {
)) != NULL) {
assert(GvCV(gv) == orig_cv);
if (opnum != OP_VEC && opnum != OP_SUBSTR && opnum != OP_POS
- && opnum != OP_UNDEF)
+ && opnum != OP_UNDEF && opnum != OP_KEYS)
CvLVALUE_off(cv); /* Now *that* was a neat trick. */
}
LEAVE;
GV *
Perl_gv_fetchmethod_pvn_flags(pTHX_ HV *stash, const char *name, const STRLEN len, U32 flags)
{
- const char *nend;
- const char *nsplit = NULL;
+ const char * const origname = name;
+ const char * const name_end = name + len;
+ const char *last_separator = NULL;
GV* gv;
HV* ostash = stash;
- const char * const origname = name;
SV *const error_report = MUTABLE_SV(stash);
const U32 autoload = flags & GV_AUTOLOAD;
const U32 do_croak = flags & GV_CROAK;
if (SvTYPE(stash) < SVt_PVHV)
stash = NULL;
else {
- /* The only way stash can become NULL later on is if nsplit is set,
+ /* The only way stash can become NULL later on is if last_separator is set,
which in turn means that there is no need for a SVt_PVHV case
the error reporting code. */
}
- for (nend = name; *nend || nend != (origname + len); nend++) {
- if (*nend == '\'') {
- nsplit = nend;
- name = nend + 1;
- }
- else if (*nend == ':' && *(nend + 1) == ':') {
- nsplit = nend++;
- name = nend + 1;
- }
+ {
+ /* check if the method name is fully qualified or
+ * not, and separate the package name from the actual
+ * method name.
+ *
+ * leaves last_separator pointing to the beginning of the
+ * last package separator (either ' or ::) or 0
+ * if none was found.
+ *
+ * leaves name pointing at the beginning of the
+ * method name.
+ */
+ const char *name_cursor = name;
+ const char * const name_em1 = name_end - 1; /* name_end minus 1 */
+ for (name_cursor = name; name_cursor < name_end ; name_cursor++) {
+ if (*name_cursor == '\'') {
+ last_separator = name_cursor;
+ name = name_cursor + 1;
+ }
+ else if (name_cursor < name_em1 && *name_cursor == ':' && name_cursor[1] == ':') {
+ last_separator = name_cursor++;
+ name = name_cursor + 1;
+ }
+ }
}
- if (nsplit) {
- if ((nsplit - origname) == 5 && memEQ(origname, "SUPER", 5)) {
+
+ /* did we find a separator? */
+ if (last_separator) {
+ if ((last_separator - origname) == 5 && memEQ(origname, "SUPER", 5)) {
/* ->SUPER::method should really be looked up in original stash */
stash = CopSTASH(PL_curcop);
flags |= GV_SUPER;
DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n",
origname, HvENAME_get(stash), name) );
}
- else if ((nsplit - origname) >= 7 &&
- strnEQ(nsplit - 7, "::SUPER", 7)) {
+ else if ((last_separator - origname) >= 7 &&
+ strnEQ(last_separator - 7, "::SUPER", 7)) {
/* don't autovifify if ->NoSuchStash::SUPER::method */
- stash = gv_stashpvn(origname, nsplit - origname - 7, is_utf8);
+ stash = gv_stashpvn(origname, last_separator - origname - 7, is_utf8);
if (stash) flags |= GV_SUPER;
}
else {
/* don't autovifify if ->NoSuchStash::method */
- stash = gv_stashpvn(origname, nsplit - origname, is_utf8);
+ stash = gv_stashpvn(origname, last_separator - origname, is_utf8);
}
ostash = stash;
}
- gv = gv_fetchmeth_pvn(stash, name, nend - name, 0, flags);
+ gv = gv_fetchmeth_pvn(stash, name, name_end - name, 0, flags);
if (!gv) {
+ /* This is the special case that exempts Foo->import and
+ Foo->unimport from being an error even if there's no
+ import/unimport subroutine */
if (strEQ(name,"import") || strEQ(name,"unimport"))
gv = MUTABLE_GV(&PL_sv_yes);
else if (autoload)
gv = gv_autoload_pvn(
- ostash, name, nend - name, GV_AUTOLOAD_ISMETHOD|flags
+ ostash, name, name_end - name, GV_AUTOLOAD_ISMETHOD|flags
);
if (!gv && do_croak) {
/* Right now this is exclusively for the benefit of S_method_common
HV_FETCH_ISEXISTS, NULL, 0)
) {
require_pv("IO/File.pm");
- gv = gv_fetchmeth_pvn(stash, name, nend - name, 0, flags);
+ gv = gv_fetchmeth_pvn(stash, name, name_end - name, 0, flags);
if (gv)
return gv;
}
Perl_croak(aTHX_
"Can't locate object method \"%"UTF8f
"\" via package \"%"HEKf"\"",
- UTF8fARG(is_utf8, nend - name, name),
+ UTF8fARG(is_utf8, name_end - name, name),
HEKfARG(HvNAME_HEK(stash)));
}
else {
SV* packnamesv;
- if (nsplit) {
- packnamesv = newSVpvn_flags(origname, nsplit - origname,
+ if (last_separator) {
+ packnamesv = newSVpvn_flags(origname, last_separator - origname,
SVs_TEMP | is_utf8);
} else {
packnamesv = error_report;
"Can't locate object method \"%"UTF8f
"\" via package \"%"SVf"\""
" (perhaps you forgot to load \"%"SVf"\"?)",
- UTF8fARG(is_utf8, nend - name, name),
+ UTF8fARG(is_utf8, name_end - name, name),
SVfARG(packnamesv), SVfARG(packnamesv));
}
}
/* require_tie_mod() internal routine for requiring a module
* that implements the logic of automatic ties like %! and %-
+ * It loads the module and then calls the _tie_it subroutine
+ * with the passed gv as an argument.
*
* The "gv" parameter should be the glob.
- * "varpv" holds the name of the var, used for error messages.
+ * "varname" holds the 1-char name of the var, used for error messages.
* "namesv" holds the module name. Its refcount will be decremented.
- * "methpv" holds the method name to test for to check that things
- * are working reasonably close to as expected.
* "flags": if flag & 1 then save the scalar before loading.
* For the protection of $! to work (it is set by this routine)
* the sv slot must already be magicalized.
*/
-STATIC HV*
-S_require_tie_mod(pTHX_ GV *gv, const char *varpv, SV* namesv, const char *methpv,const U32 flags)
+STATIC void
+S_require_tie_mod(pTHX_ GV *gv, const char varname, const char * name,
+ STRLEN len, const U32 flags)
{
- HV* stash = gv_stashsv(namesv, 0);
+ const SV * const target = varname == '[' ? GvSV(gv) : (SV *)GvHV(gv);
PERL_ARGS_ASSERT_REQUIRE_TIE_MOD;
- if (!stash || !(gv_fetchmethod_autoload(stash, methpv, FALSE))) {
- SV *module = newSVsv(namesv);
- char varname = *varpv; /* varpv might be clobbered by load_module,
- so save it. For the moment it's always
- a single char. */
+ /* If it is not tied */
+ if (!target || !SvRMAGICAL(target)
+ || !mg_find(target,
+ varname == '[' ? PERL_MAGIC_tiedscalar : PERL_MAGIC_tied))
+ {
+ HV *stash;
+ GV **gvp;
+ dSP;
+
+ ENTER;
+
+#define HV_FETCH_TIE_FUNC (GV **)hv_fetch(stash, "_tie_it", 7, 0)
+
+ /* Load the module if it is not loaded. */
+ if (!(stash = gv_stashpvn(name, len, 0))
+ || !(gvp = HV_FETCH_TIE_FUNC) || !*gvp || !GvCV(*gvp))
+ {
+ SV * const module = newSVpvn(name, len);
const char type = varname == '[' ? '$' : '%';
-#ifdef DEBUGGING
- dSP;
-#endif
- ENTER;
- SAVEFREESV(namesv);
if ( flags & 1 )
save_scalar(gv);
Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, module, NULL);
assert(sp == PL_stack_sp);
- stash = gv_stashsv(namesv, 0);
+ stash = gv_stashpvn(name, len, 0);
if (!stash)
- Perl_croak(aTHX_ "panic: Can't use %c%c because %"SVf" is not available",
- type, varname, SVfARG(namesv));
- else if (!gv_fetchmethod(stash, methpv))
- Perl_croak(aTHX_ "panic: Can't use %c%c because %"SVf" does not support method %s",
- type, varname, SVfARG(namesv), methpv);
- LEAVE;
+ Perl_croak(aTHX_ "panic: Can't use %c%c because %s is not available",
+ type, varname, name);
+ else if (!(gvp = HV_FETCH_TIE_FUNC) || !*gvp || !GvCV(*gvp))
+ Perl_croak(aTHX_ "panic: Can't use %c%c because %s does not define _tie_it",
+ type, varname, name);
+ }
+ /* Now call the tie function. It should be in *gvp. */
+ assert(gvp); assert(*gvp); assert(GvCV(*gvp));
+ PUSHMARK(SP);
+ XPUSHs((SV *)gv);
+ PUTBACK;
+ call_sv((SV *)*gvp, G_VOID|G_DISCARD);
+ LEAVE;
}
- else SvREFCNT_dec_NN(namesv);
- return stash;
}
/*
gv_stashsvpvn_cached
Returns a pointer to the stash for a specified package, possibly
-cached. Implements both C<gv_stashpvn> and C<gc_stashsv>.
+cached. Implements both C<gv_stashpvn> and C<gv_stashsv>.
Requires one of either namesv or namepv to be non-null.
* Note that it does not insert the GV into the stash prior to
* magicalization, which some variables require need in order
* to work (like $[, %+, %-, %!), so callers must take care of
- * that beforehand.
+ * that.
*
- * The return value has a specific meaning for gv_fetchpvn_flags:
- * If it returns true, and the gv is empty, it indicates that its
- * refcount should be decreased.
+ * It returns true if the gv did turn out to be magical one; i.e.,
+ * if gv_magicalize actually did something.
*/
PERL_STATIC_INLINE bool
S_gv_magicalize(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len,
- bool addmg, const svtype sv_type)
+ const svtype sv_type)
{
SSize_t paren;
GvMULTI_on(gv);
break;
case 'a':
+ if (stash == PL_debstash && len==4 && strEQ(name2,"rgs")) {
+ GvMULTI_on(gv_AVadd(gv));
+ break;
+ }
case 'b':
if (len == 1 && sv_type == SVt_PV)
GvMULTI_on(gv);
default:
goto try_core;
}
- return addmg;
+ goto ret;
}
try_core:
if (len > 1 /* shortest is uc */ && HvNAMELEN_get(stash) == 4) {
goto magicalize;
break;
case '\005': /* $^ENCODING */
- if (*name2 == '_') {
- name2++;
- }
if (strEQ(name2, "NCODING"))
goto magicalize;
break;
case '\027': /* $^WARNING_BITS */
if (strEQ(name2, "ARNING_BITS"))
goto magicalize;
+#ifdef WIN32
+ else if (strEQ(name2, "IN32_SLOPPY_STAT"))
+ goto magicalize;
+#endif
break;
case '1':
case '2':
this test */
UV uv;
if (!grok_atoUV(name, &uv, NULL) || uv > I32_MAX)
- return addmg;
+ goto ret;
/* XXX why are we using a SSize_t? */
paren = (SSize_t)(I32)uv;
goto storeparen;
/* magicalization must be done before require_tie_mod is called */
if (sv_type == SVt_PVHV || sv_type == SVt_PVGV)
- {
- require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1);
- addmg = FALSE;
- }
+ require_tie_mod(gv, '!', "Errno", 5, 1);
break;
case '-': /* $- */
SvREADONLY_on(av);
if (sv_type == SVt_PVHV || sv_type == SVt_PVGV)
- {
- require_tie_mod(gv, name, newSVpvs("Tie::Hash::NamedCapture"), "TIEHASH", 0);
- addmg = FALSE;
- }
+ require_tie_mod(gv, *name, "Tie::Hash::NamedCapture",23,0);
break;
}
case '[': /* $[ */
if ((sv_type == SVt_PV || sv_type == SVt_PVGV)
&& FEATURE_ARYBASE_IS_ENABLED) {
- require_tie_mod(gv,name,newSVpvs("arybase"),"FETCH",0);
- addmg = FALSE;
+ require_tie_mod(gv,'[',"arybase",7,0);
}
else goto magicalize;
break;
}
}
- return addmg;
+ ret:
+ /* Return true if we actually did something. */
+ return GvAV(gv) || GvHV(gv) || GvIO(gv) || GvCV(gv)
+ || ( GvSV(gv) && (
+ SvOK(GvSV(gv)) || SvMAGICAL(GvSV(gv))
+ )
+ );
}
/* If we do ever start using this later on in the file, we need to make
if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) {
if (*name == '!')
- require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1);
+ require_tie_mod(gv, '!', "Errno", 5, 1);
else if (*name == '-' || *name == '+')
- require_tie_mod(gv, name, newSVpvs("Tie::Hash::NamedCapture"), "TIEHASH", 0);
+ require_tie_mod(gv, *name, "Tie::Hash::NamedCapture", 23, 0);
} else if (sv_type == SVt_PV) {
if (*name == '*' || *name == '#') {
/* diag_listed_as: $* is no longer supported */
if (sv_type==SVt_PV || sv_type==SVt_PVGV) {
switch (*name) {
case '[':
- require_tie_mod(gv,name,newSVpvs("arybase"),"FETCH",0);
+ require_tie_mod(gv,'[',"arybase",7,0);
break;
#ifdef PERL_SAWAMPERSAND
case '`':
if ( isIDFIRST_lazy_if(name, is_utf8) && !ckWARN(WARN_ONCE) )
GvMULTI_on(gv) ;
- /* First, store the gv in the symtab if we're adding magic,
- * but only for non-empty GVs
- */
-#define GvEMPTY(gv) !(GvAV(gv) || GvHV(gv) || GvIO(gv) \
- || GvCV(gv) || (GvSV(gv) && SvOK(GvSV(gv))))
-
- if ( addmg && !GvEMPTY(gv) ) {
- (void)hv_store(stash,name,len,(SV *)gv,0);
- }
-
/* set up magic where warranted */
- if ( gv_magicalize(gv, stash, name, len, addmg, sv_type) ) {
+ if ( gv_magicalize(gv, stash, name, len, sv_type) ) {
/* See 23496c6 */
- if (GvEMPTY(gv)) {
- if ( GvSV(gv) && SvMAGICAL(GvSV(gv)) ) {
- /* The GV was and still is "empty", except that now
- * it has the magic flags turned on, so we want it
+ if (addmg) {
+ /* gv_magicalize magicalised this gv, so we want it
* stored in the symtab.
+ * Effectively the caller is asking, ‘Does this gv exist?’
+ * And we respond, ‘Er, *now* it does!’
*/
(void)hv_store(stash,name,len,(SV *)gv,0);
- }
- else {
- /* Most likely the temporary GV created above */
+ }
+ }
+ else if (addmg) {
+ /* The temporary GV created above */
SvREFCNT_dec_NN(gv);
gv = NULL;
- }
- }
}
if (gv) gv_init_svtype(gv, faking_it ? SVt_PVCV : sv_type);
PERL_ARGS_ASSERT_GV_CHECK;
- if (!HvARRAY(stash))
+ if (!SvOOK(stash))
return;
- assert(SvOOK(stash));
+ assert(HvARRAY(stash));
for (i = 0; i <= (I32) HvMAX(stash); i++) {
const HE *entry;
for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) {
GV *gv;
HV *hv;
- if (HeKEY(entry)[HeKLEN(entry)-1] == ':' &&
+ STRLEN keylen = HeKLEN(entry);
+ const char * const key = HeKEY(entry);
+
+ if (keylen >= 2 && key[keylen-2] == ':' && key[keylen-1] == ':' &&
(gv = MUTABLE_GV(HeVAL(entry))) && isGV(gv) && (hv = GvHV(gv)))
{
if (hv != PL_defstash && hv != stash
SV* res;
const bool oldcatch = CATCH_GET;
I32 oldmark, nret;
- int gimme = force_scalar ? G_SCALAR : GIMME_V;
+ U8 gimme = force_scalar ? G_SCALAR : GIMME_V;
CATCH_SET(TRUE);
Zero(&myop, 1, BINOP);
https://perl5.git.perl.org / perl5.git / blobdiff