/* mg.c
*
* Copyright (c) 1991-2002, Larry Wall
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
*
*/
/*
* "Sam sat on the ground and put his head in his hands. 'I wish I had never
* come here, and I don't want to see no more magic,' he said, and fell silent."
*/
/*
=head1 Magical Functions
*/
#include "EXTERN.h"
#define PERL_IN_MG_C
#include "perl.h"
#if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS)
# ifndef NGROUPS
# define NGROUPS 32
# endif
# ifdef I_GRP
# include <grp.h>
# endif
#endif
/* if you only have signal() and it resets on each signal, FAKE_PERSISTENT_SIGNAL_HANDLERS fixes */
#if !defined(HAS_SIGACTION) && defined(VMS)
# define FAKE_PERSISTENT_SIGNAL_HANDLERS
#endif
/* if we're doing kill() with sys$sigprc on VMS, FAKE_DEFAULT_SIGNAL_HANDLERS */
#if defined(KILL_BY_SIGPRC)
# define FAKE_DEFAULT_SIGNAL_HANDLERS
#endif
static void restore_magic(pTHX_ void *p);
static void unwind_handler_stack(pTHX_ void *p);
/*
* Use the "DESTRUCTOR" scope cleanup to reinstate magic.
*/
struct magic_state {
SV* mgs_sv;
U32 mgs_flags;
I32 mgs_ss_ix;
};
/* MGS is typedef'ed to struct magic_state in perl.h */
STATIC void
S_save_magic(pTHX_ I32 mgs_ix, SV *sv)
{
MGS* mgs;
assert(SvMAGICAL(sv));
SAVEDESTRUCTOR_X(restore_magic, INT2PTR(void*, (IV)mgs_ix));
mgs = SSPTR(mgs_ix, MGS*);
mgs->mgs_sv = sv;
mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
SvMAGICAL_off(sv);
SvREADONLY_off(sv);
SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_NOK|SVp_POK)) >> PRIVSHIFT;
}
/*
=for apidoc mg_magical
Turns on the magical status of an SV. See C<sv_magic>.
=cut
*/
void
Perl_mg_magical(pTHX_ SV *sv)
{
MAGIC* mg;
for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
MGVTBL* vtbl = mg->mg_virtual;
if (vtbl) {
if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
SvGMAGICAL_on(sv);
if (vtbl->svt_set)
SvSMAGICAL_on(sv);
if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || vtbl->svt_clear)
SvRMAGICAL_on(sv);
}
}
}
/*
=for apidoc mg_get
Do magic after a value is retrieved from the SV. See C<sv_magic>.
=cut
*/
int
Perl_mg_get(pTHX_ SV *sv)
{
int new = 0;
MAGIC *newmg, *head, *cur, *mg;
I32 mgs_ix = SSNEW(sizeof(MGS));
save_magic(mgs_ix, sv);
/* We must call svt_get(sv, mg) for each valid entry in the linked
list of magic. svt_get() may delete the current entry, add new
magic to the head of the list, or upgrade the SV. AMS 20010810 */
newmg = cur = head = mg = SvMAGIC(sv);
while (mg) {
MGVTBL *vtbl = mg->mg_virtual;
if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
/* Don't restore the flags for this entry if it was deleted. */
if (mg->mg_flags & MGf_GSKIP)
(SSPTR(mgs_ix, MGS *))->mgs_flags = 0;
}
mg = mg->mg_moremagic;
if (new) {
/* Have we finished with the new entries we saw? Start again
where we left off (unless there are more new entries). */
if (mg == head) {
new = 0;
mg = cur;
head = newmg;
}
}
/* Were any new entries added? */
if (!new && (newmg = SvMAGIC(sv)) != head) {
new = 1;
cur = mg;
mg = newmg;
}
}
restore_magic(aTHX_ INT2PTR(void *, (IV)mgs_ix));
return 0;
}
/*
=for apidoc mg_set
Do magic after a value is assigned to the SV. See C<sv_magic>.
=cut
*/
int
Perl_mg_set(pTHX_ SV *sv)
{
I32 mgs_ix;
MAGIC* mg;
MAGIC* nextmg;
mgs_ix = SSNEW(sizeof(MGS));
save_magic(mgs_ix, sv);
for (mg = SvMAGIC(sv); mg; mg = nextmg) {
MGVTBL* vtbl = mg->mg_virtual;
nextmg = mg->mg_moremagic; /* it may delete itself */
if (mg->mg_flags & MGf_GSKIP) {
mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
(SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
}
if (vtbl && vtbl->svt_set)
CALL_FPTR(vtbl->svt_set)(aTHX_ sv, mg);
}
restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
return 0;
}
/*
=for apidoc mg_length
Report on the SV's length. See C<sv_magic>.
=cut
*/
U32
Perl_mg_length(pTHX_ SV *sv)
{
MAGIC* mg;
STRLEN len;
for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
MGVTBL* vtbl = mg->mg_virtual;
if (vtbl && vtbl->svt_len) {
I32 mgs_ix;
mgs_ix = SSNEW(sizeof(MGS));
save_magic(mgs_ix, sv);
/* omit MGf_GSKIP -- not changed here */
len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
return len;
}
}
if (DO_UTF8(sv))
{
U8 *s = (U8*)SvPV(sv, len);
len = Perl_utf8_length(aTHX_ s, s + len);
}
else
(void)SvPV(sv, len);
return len;
}
I32
Perl_mg_size(pTHX_ SV *sv)
{
MAGIC* mg;
I32 len;
for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
MGVTBL* vtbl = mg->mg_virtual;
if (vtbl && vtbl->svt_len) {
I32 mgs_ix;
mgs_ix = SSNEW(sizeof(MGS));
save_magic(mgs_ix, sv);
/* omit MGf_GSKIP -- not changed here */
len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
return len;
}
}
switch(SvTYPE(sv)) {
case SVt_PVAV:
len = AvFILLp((AV *) sv); /* Fallback to non-tied array */
return len;
case SVt_PVHV:
/* FIXME */
default:
Perl_croak(aTHX_ "Size magic not implemented");
break;
}
return 0;
}
/*
=for apidoc mg_clear
Clear something magical that the SV represents. See C<sv_magic>.
=cut
*/
int
Perl_mg_clear(pTHX_ SV *sv)
{
I32 mgs_ix;
MAGIC* mg;
mgs_ix = SSNEW(sizeof(MGS));
save_magic(mgs_ix, sv);
for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
MGVTBL* vtbl = mg->mg_virtual;
/* omit GSKIP -- never set here */
if (vtbl && vtbl->svt_clear)
CALL_FPTR(vtbl->svt_clear)(aTHX_ sv, mg);
}
restore_magic(aTHX_ INT2PTR(void*, (IV)mgs_ix));
return 0;
}
/*
=for apidoc mg_find
Finds the magic pointer for type matching the SV. See C<sv_magic>.
=cut
*/
MAGIC*
Perl_mg_find(pTHX_ SV *sv, int type)
{
MAGIC* mg;
if (!sv)
return 0;
for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
if (mg->mg_type == type)
return mg;
}
return 0;
}
/*
=for apidoc mg_copy
Copies the magic from one SV to another. See C<sv_magic>.
=cut
*/
int
Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
{
int count = 0;
MAGIC* mg;
for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
MGVTBL* vtbl = mg->mg_virtual;
if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){
count += CALL_FPTR(vtbl->svt_copy)(aTHX_ sv, mg, nsv, key, klen);
}
else if (isUPPER(mg->mg_type)) {
sv_magic(nsv,
mg->mg_type == PERL_MAGIC_tied ? SvTIED_obj(sv, mg) :
(mg->mg_type == PERL_MAGIC_regdata && mg->mg_obj)
? sv : mg->mg_obj,
toLOWER(mg->mg_type), key, klen);
count++;
}
}
return count;
}
/*
=for apidoc mg_free
Free any magic storage used by the SV. See C<sv_magic>.
=cut
*/
int
Perl_mg_free(pTHX_ SV *sv)
{
MAGIC* mg;
MAGIC* moremagic;
for (mg = SvMAGIC(sv); mg; mg = moremagic) {
MGVTBL* vtbl = mg->mg_virtual;
moremagic = mg->mg_moremagic;
if (vtbl && vtbl->svt_free)
CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
if (mg->mg_len > 0)
Safefree(mg->mg_ptr);
else if (mg->mg_len == HEf_SVKEY)
SvREFCNT_dec((SV*)mg->mg_ptr);
}
if (mg->mg_flags & MGf_REFCOUNTED)
SvREFCNT_dec(mg->mg_obj);
Safefree(mg);
}
SvMAGIC(sv) = 0;
return 0;
}
#if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
#include <signal.h>
#endif
U32
Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
{
register REGEXP *rx;
if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
if (mg->mg_obj) /* @+ */
return rx->nparens;
else /* @- */
return rx->lastparen;
}
return (U32)-1;
}
int
Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
{
register I32 paren;
register I32 s;
register I32 i;
register REGEXP *rx;
I32 t;
if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
paren = mg->mg_len;
if (paren < 0)
return 0;
if (paren <= (I32)rx->nparens &&
(s = rx->startp[paren]) != -1 &&
(t = rx->endp[paren]) != -1)
{
if (mg->mg_obj) /* @+ */
i = t;
else /* @- */
i = s;
if (i > 0 && PL_reg_match_utf8) {
char *b = rx->subbeg;
if (b)
i = Perl_utf8_length(aTHX_ (U8*)b, (U8*)(b+i));
}
sv_setiv(sv, i);
}
}
return 0;
}
int
Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
{
Perl_croak(aTHX_ PL_no_modify);
/* NOT REACHED */
return 0;
}
U32
Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
{
register I32 paren;
register I32 i;
register REGEXP *rx;
I32 s1, t1;
switch (*mg->mg_ptr) {
case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9': case '&':
if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
paren = atoi(mg->mg_ptr); /* $& is in [0] */
getparen:
if (paren <= (I32)rx->nparens &&
(s1 = rx->startp[paren]) != -1 &&
(t1 = rx->endp[paren]) != -1)
{
i = t1 - s1;
getlen:
if (i > 0 && PL_reg_match_utf8) {
char *s = rx->subbeg + s1;
char *send = rx->subbeg + t1;
i = t1 - s1;
if (is_utf8_string((U8*)s, i))
i = Perl_utf8_length(aTHX_ (U8*)s, (U8*)send);
}
if (i < 0)
Perl_croak(aTHX_ "panic: magic_len: %"IVdf, (IV)i);
return i;
}
else {
if (ckWARN(WARN_UNINITIALIZED))
report_uninit();
}
}
else {
if (ckWARN(WARN_UNINITIALIZED))
report_uninit();
}
return 0;
case '+':
if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
paren = rx->lastparen;
if (paren)
goto getparen;
}
return 0;
case '\016': /* ^N */
if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
paren = rx->lastcloseparen;
if (paren)
goto getparen;
}
return 0;
case '`':
if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
if (rx->startp[0] != -1) {
i = rx->startp[0];
if (i > 0) {
s1 = 0;
t1 = i;
goto getlen;
}
}
}
return 0;
case '\'':
if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
if (rx->endp[0] != -1) {
i = rx->sublen - rx->endp[0];
if (i > 0) {
s1 = rx->endp[0];
t1 = rx->sublen;
goto getlen;
}
}
}
return 0;
}
magic_get(sv,mg);
if (!SvPOK(sv) && SvNIOK(sv)) {
STRLEN n_a;
sv_2pv(sv, &n_a);
}
if (SvPOK(sv))
return SvCUR(sv);
return 0;
}
int
Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
{
register I32 paren;
register char *s;
register I32 i;
register REGEXP *rx;
switch (*mg->mg_ptr) {
case '\001': /* ^A */
sv_setsv(sv, PL_bodytarget);
break;
case '\003': /* ^C */
sv_setiv(sv, (IV)PL_minus_c);
break;
case '\004': /* ^D */
sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
#if defined(YYDEBUG) && defined(DEBUGGING)
PL_yydebug = DEBUG_p_TEST;
#endif
break;
case '\005': /* ^E */
if (*(mg->mg_ptr+1) == '\0') {
#ifdef MACOS_TRADITIONAL
{
char msg[256];
sv_setnv(sv,(double)gMacPerl_OSErr);
sv_setpv(sv, gMacPerl_OSErr ? GetSysErrText(gMacPerl_OSErr, msg) : "");
}
#else
#ifdef VMS
{
# include <descrip.h>
# include <starlet.h>
char msg[255];
$DESCRIPTOR(msgdsc,msg);
sv_setnv(sv,(NV) vaxc$errno);
if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
else
sv_setpv(sv,"");
}
#else
#ifdef OS2
if (!(_emx_env & 0x200)) { /* Under DOS */
sv_setnv(sv, (NV)errno);
sv_setpv(sv, errno ? Strerror(errno) : "");
} else {
if (errno != errno_isOS2) {
int tmp = _syserrno();
if (tmp) /* 2nd call to _syserrno() makes it 0 */
Perl_rc = tmp;
}
sv_setnv(sv, (NV)Perl_rc);
sv_setpv(sv, os2error(Perl_rc));
}
#else
#ifdef WIN32
{
DWORD dwErr = GetLastError();
sv_setnv(sv, (NV)dwErr);
if (dwErr)
{
PerlProc_GetOSError(sv, dwErr);
}
else
sv_setpv(sv, "");
SetLastError(dwErr);
}
#else
sv_setnv(sv, (NV)errno);
sv_setpv(sv, errno ? Strerror(errno) : "");
#endif
#endif
#endif
#endif
SvNOK_on(sv); /* what a wonderful hack! */
}
else if (strEQ(mg->mg_ptr+1, "NCODING"))
sv_setsv(sv, PL_encoding);
break;
case '\006': /* ^F */
sv_setiv(sv, (IV)PL_maxsysfd);
break;
case '\010': /* ^H */
sv_setiv(sv, (IV)PL_hints);
break;
case '\011': /* ^I */ /* NOT \t in EBCDIC */
if (PL_inplace)
sv_setpv(sv, PL_inplace);
else
sv_setsv(sv, &PL_sv_undef);
break;
case '\017': /* ^O & ^OPEN */
if (*(mg->mg_ptr+1) == '\0')
sv_setpv(sv, PL_osname);
else if (strEQ(mg->mg_ptr, "\017PEN")) {
if (!PL_compiling.cop_io)
sv_setsv(sv, &PL_sv_undef);
else {
sv_setsv(sv, PL_compiling.cop_io);
}
}
break;
case '\020': /* ^P */
sv_setiv(sv, (IV)PL_perldb);
break;
case '\023': /* ^S */
{
if (PL_lex_state != LEX_NOTPARSING)
(void)SvOK_off(sv);
else if (PL_in_eval)
sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
else
sv_setiv(sv, 0);
}
break;
case '\024': /* ^T */
if (*(mg->mg_ptr+1) == '\0') {
#ifdef BIG_TIME
sv_setnv(sv, PL_basetime);
#else
sv_setiv(sv, (IV)PL_basetime);
#endif
}
else if (strEQ(mg->mg_ptr, "\024AINT"))
sv_setiv(sv, PL_tainting);
break;
case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
if (*(mg->mg_ptr+1) == '\0')
sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
if (PL_compiling.cop_warnings == pWARN_NONE ||
PL_compiling.cop_warnings == pWARN_STD)
{
sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
}
else if (PL_compiling.cop_warnings == pWARN_ALL) {
sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
}
else {
sv_setsv(sv, PL_compiling.cop_warnings);
}
SvPOK_only(sv);
}
else if (strEQ(mg->mg_ptr+1, "IDE_SYSTEM_CALLS"))
sv_setiv(sv, (IV)PL_widesyscalls);
break;
case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9': case '&':
if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
I32 s1, t1;
/*
* Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
* XXX Does the new way break anything?
*/
paren = atoi(mg->mg_ptr); /* $& is in [0] */
getparen:
if (paren <= (I32)rx->nparens &&
(s1 = rx->startp[paren]) != -1 &&
(t1 = rx->endp[paren]) != -1)
{
i = t1 - s1;
s = rx->subbeg + s1;
if (!rx->subbeg)
break;
getrx:
if (i >= 0) {
bool was_tainted = FALSE;
if (PL_tainting) {
was_tainted = PL_tainted;
PL_tainted = FALSE;
}
sv_setpvn(sv, s, i);
if (PL_reg_match_utf8 && is_utf8_string((U8*)s, i))
SvUTF8_on(sv);
else
SvUTF8_off(sv);
if (PL_tainting)
PL_tainted = (was_tainted || RX_MATCH_TAINTED(rx));
break;
}
}
}
sv_setsv(sv,&PL_sv_undef);
break;
case '+':
if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
paren = rx->lastparen;
if (paren)
goto getparen;
}
sv_setsv(sv,&PL_sv_undef);
break;
case '\016': /* ^N */
if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
paren = rx->lastcloseparen;
if (paren)
goto getparen;
}
sv_setsv(sv,&PL_sv_undef);
break;
case '`':
if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
if ((s = rx->subbeg) && rx->startp[0] != -1) {
i = rx->startp[0];
goto getrx;
}
}
sv_setsv(sv,&PL_sv_undef);
break;
case '\'':
if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
if (rx->subbeg && rx->endp[0] != -1) {
s = rx->subbeg + rx->endp[0];
i = rx->sublen - rx->endp[0];
goto getrx;
}
}
sv_setsv(sv,&PL_sv_undef);
break;
case '.':
#ifndef lint
if (GvIO(PL_last_in_gv)) {
sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
}
#endif
break;
case '?':
{
sv_setiv(sv, (IV)STATUS_CURRENT);
#ifdef COMPLEX_STATUS
LvTARGOFF(sv) = PL_statusvalue;
LvTARGLEN(sv) = PL_statusvalue_vms;
#endif
}
break;
case '^':
s = IoTOP_NAME(GvIOp(PL_defoutgv));
if (s)
sv_setpv(sv,s);
else {
sv_setpv(sv,GvENAME(PL_defoutgv));
sv_catpv(sv,"_TOP");
}
break;
case '~':
s = IoFMT_NAME(GvIOp(PL_defoutgv));
if (!s)
s = GvENAME(PL_defoutgv);
sv_setpv(sv,s);
break;
#ifndef lint
case '=':
sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
break;
case '-':
sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
break;
case '%':
sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
break;
#endif
case ':':
break;
case '/':
break;
case '[':
WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
break;
case '|':
sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
break;
case ',':
break;
case '\\':
if (PL_ors_sv)
sv_setpv(sv,SvPVX(PL_ors_sv));
break;
case '#':
sv_setpv(sv,PL_ofmt);
break;
case '!':
#ifdef VMS
sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
sv_setpv(sv, errno ? Strerror(errno) : "");
#else
{
int saveerrno = errno;
sv_setnv(sv, (NV)errno);
#ifdef OS2
if (errno == errno_isOS2 || errno == errno_isOS2_set)
sv_setpv(sv, os2error(Perl_rc));
else
#endif
sv_setpv(sv, errno ? Strerror(errno) : "");
errno = saveerrno;
}
#endif
SvNOK_on(sv); /* what a wonderful hack! */
break;
case '<':
sv_setiv(sv, (IV)PL_uid);
break;
case '>':
sv_setiv(sv, (IV)PL_euid);
break;
case '(':
sv_setiv(sv, (IV)PL_gid);
#ifdef HAS_GETGROUPS
Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_gid);
#endif
goto add_groups;
case ')':
sv_setiv(sv, (IV)PL_egid);
#ifdef HAS_GETGROUPS
Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_egid);
#endif
add_groups:
#ifdef HAS_GETGROUPS
{
Groups_t gary[NGROUPS];
i = getgroups(NGROUPS,gary);
while (--i >= 0)
Perl_sv_catpvf(aTHX_ sv, " %"Gid_t_f, gary[i]);
}
#endif
(void)SvIOK_on(sv); /* what a wonderful hack! */
break;
case '*':
break;
#ifndef MACOS_TRADITIONAL
case '0':
break;
#endif
#ifdef USE_5005THREADS
case '@':
sv_setsv(sv, thr->errsv);
break;
#endif /* USE_5005THREADS */
}
return 0;
}
int
Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
{
struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
if (uf && uf->uf_val)
(*uf->uf_val)(aTHX_ uf->uf_index, sv);
return 0;
}
int
Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
{
register char *s;
char *ptr;
STRLEN len, klen;
s = SvPV(sv,len);
ptr = MgPV(mg,klen);
my_setenv(ptr, s);
#ifdef DYNAMIC_ENV_FETCH
/* We just undefd an environment var. Is a replacement */
/* waiting in the wings? */
if (!len) {
SV **valp;
if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
s = SvPV(*valp, len);
}
#endif
#if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
/* And you'll never guess what the dog had */
/* in its mouth... */
if (PL_tainting) {
MgTAINTEDDIR_off(mg);
#ifdef VMS
if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
char pathbuf[256], eltbuf[256], *cp, *elt = s;
Stat_t sbuf;
int i = 0, j = 0;
do { /* DCL$PATH may be a search list */
while (1) { /* as may dev portion of any element */
if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
if ( *(cp+1) == '.' || *(cp+1) == '-' ||
cando_by_name(S_IWUSR,0,elt) ) {
MgTAINTEDDIR_on(mg);
return 0;
}
}
if ((cp = strchr(elt, ':')) != Nullch)
*cp = '\0';
if (my_trnlnm(elt, eltbuf, j++))
elt = eltbuf;
else
break;
}
j = 0;
} while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
}
#endif /* VMS */
if (s && klen == 4 && strEQ(ptr,"PATH")) {
char *strend = s + len;
while (s < strend) {
char tmpbuf[256];
Stat_t st;
I32 i;
s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
s, strend, ':', &i);
s++;
if (i >= sizeof tmpbuf /* too long -- assume the worst */
|| *tmpbuf != '/'
|| (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
MgTAINTEDDIR_on(mg);
return 0;
}
}
}
}
#endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
return 0;
}
int
Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
{
STRLEN n_a;
my_setenv(MgPV(mg,n_a),Nullch);
return 0;
}
int
Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
{
#if defined(VMS)
Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
#else
if (PL_localizing) {
HE* entry;
STRLEN n_a;
magic_clear_all_env(sv,mg);
hv_iterinit((HV*)sv);
while ((entry = hv_iternext((HV*)sv))) {
I32 keylen;
my_setenv(hv_iterkey(entry, &keylen),
SvPV(hv_iterval((HV*)sv, entry), n_a));
}
}
#endif
return 0;
}
int
Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
{
#if defined(VMS) || defined(EPOC)
Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
#else
# if defined(PERL_IMPLICIT_SYS) || defined(WIN32)
PerlEnv_clearenv();
# else
# ifdef USE_ENVIRON_ARRAY
# if defined(USE_ITHREADS)
/* only the parent thread can clobber the process environment */
if (PL_curinterp == aTHX)
# endif
{
# ifndef PERL_USE_SAFE_PUTENV
I32 i;
if (environ == PL_origenviron)
environ = (char**)safesysmalloc(sizeof(char*));
else
for (i = 0; environ[i]; i++)
safesysfree(environ[i]);
# endif /* PERL_USE_SAFE_PUTENV */
environ[0] = Nullch;
}
# endif /* USE_ENVIRON_ARRAY */
# endif /* PERL_IMPLICIT_SYS || WIN32 */
#endif /* VMS || EPC */
return 0;
}
#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS)||defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
static int sig_handlers_initted = 0;
#endif
#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
static int sig_ignoring[SIG_SIZE]; /* which signals we are ignoring */
#endif
#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
static int sig_defaulting[SIG_SIZE];
#endif
#ifndef PERL_MICRO
int
Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
{
I32 i;
STRLEN n_a;
/* Are we fetching a signal entry? */
i = whichsig(MgPV(mg,n_a));
if (i) {
if(PL_psig_ptr[i])
sv_setsv(sv,PL_psig_ptr[i]);
else {
Sighandler_t sigstate;
sigstate = rsignal_state(i);
#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
if (sig_handlers_initted && sig_ignoring[i]) sigstate = SIG_IGN;
#endif
#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
if (sig_handlers_initted && sig_defaulting[i]) sigstate = SIG_DFL;
#endif
/* cache state so we don't fetch it again */
if(sigstate == SIG_IGN)
sv_setpv(sv,"IGNORE");
else
sv_setsv(sv,&PL_sv_undef);
PL_psig_ptr[i] = SvREFCNT_inc(sv);
SvTEMP_off(sv);
}
}
return 0;
}
int
Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
{
I32 i;
STRLEN n_a;
/* Are we clearing a signal entry? */
i = whichsig(MgPV(mg,n_a));
if (i) {
if(PL_psig_ptr[i]) {
SvREFCNT_dec(PL_psig_ptr[i]);
PL_psig_ptr[i]=0;
}
if(PL_psig_name[i]) {
SvREFCNT_dec(PL_psig_name[i]);
PL_psig_name[i]=0;
}
}
return 0;
}
void
Perl_raise_signal(pTHX_ int sig)
{
/* Set a flag to say this signal is pending */
PL_psig_pend[sig]++;
/* And one to say _a_ signal is pending */
PL_sig_pending = 1;
}
Signal_t
Perl_csighandler(int sig)
{
#ifdef PERL_GET_SIG_CONTEXT
dTHXa(PERL_GET_SIG_CONTEXT);
#else
dTHX;
#endif
#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
(void) rsignal(sig, &Perl_csighandler);
if (sig_ignoring[sig]) return;
#endif
#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
if (sig_defaulting[sig])
#ifdef KILL_BY_SIGPRC
exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
#else
exit(1);
#endif
#endif
#ifdef PERL_OLD_SIGNALS
/* Call the perl level handler now with risk we may be in malloc() etc. */
(*PL_sighandlerp)(sig);
#else
Perl_raise_signal(aTHX_ sig);
#endif
}
#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
void
Perl_csighandler_init(void)
{
int sig;
if (sig_handlers_initted) return;
for (sig = 1; sig < SIG_SIZE; sig++) {
#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
dTHX;
sig_defaulting[sig] = 1;
(void) rsignal(sig, &Perl_csighandler);
#endif
#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
sig_ignoring[sig] = 0;
#endif
}
sig_handlers_initted = 1;
}
#endif
void
Perl_despatch_signals(pTHX)
{
int sig;
PL_sig_pending = 0;
for (sig = 1; sig < SIG_SIZE; sig++) {
if (PL_psig_pend[sig]) {
PL_psig_pend[sig] = 0;
(*PL_sighandlerp)(sig);
}
}
}
int
Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
{
register char *s;
I32 i;
SV** svp = 0;
STRLEN len;
s = MgPV(mg,len);
if (*s == '_') {
if (strEQ(s,"__DIE__"))
svp = &PL_diehook;
else if (strEQ(s,"__WARN__"))
svp = &PL_warnhook;
else
Perl_croak(aTHX_ "No such hook: %s", s);
i = 0;
if (*svp) {
SvREFCNT_dec(*svp);
*svp = 0;
}
}
else {
i = whichsig(s); /* ...no, a brick */
if (!i) {
if (ckWARN(WARN_SIGNAL))
Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", s);
return 0;
}
#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
if (!sig_handlers_initted) Perl_csighandler_init();
#endif
#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
sig_ignoring[i] = 0;
#endif
#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
sig_defaulting[i] = 0;
#endif
SvREFCNT_dec(PL_psig_name[i]);
SvREFCNT_dec(PL_psig_ptr[i]);
PL_psig_ptr[i] = SvREFCNT_inc(sv);
SvTEMP_off(sv); /* Make sure it doesn't go away on us */
PL_psig_name[i] = newSVpvn(s, len);
SvREADONLY_on(PL_psig_name[i]);
}
if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
if (i)
(void)rsignal(i, &Perl_csighandler);
else
*svp = SvREFCNT_inc(sv);
return 0;
}
s = SvPV_force(sv,len);
if (strEQ(s,"IGNORE")) {
if (i) {
#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
sig_ignoring[i] = 1;
(void)rsignal(i, &Perl_csighandler);
#else
(void)rsignal(i, SIG_IGN);
#endif
} else
*svp = 0;
}
else if (strEQ(s,"DEFAULT") || !*s) {
if (i)
#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
{
sig_defaulting[i] = 1;
(void)rsignal(i, &Perl_csighandler);
}
#else
(void)rsignal(i, SIG_DFL);
#endif
else
*svp = 0;
}
else {
/*
* We should warn if HINT_STRICT_REFS, but without
* access to a known hint bit in a known OP, we can't
* tell whether HINT_STRICT_REFS is in force or not.
*/
if (!strchr(s,':') && !strchr(s,'\''))
sv_insert(sv, 0, 0, "main::", 6);
if (i)
(void)rsignal(i, &Perl_csighandler);
else
*svp = SvREFCNT_inc(sv);
}
return 0;
}
#endif /* !PERL_MICRO */
int
Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
{
PL_sub_generation++;
return 0;
}
int
Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
{
/* HV_badAMAGIC_on(Sv_STASH(sv)); */
PL_amagic_generation++;
return 0;
}
int
Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
{
HV *hv = (HV*)LvTARG(sv);
I32 i = 0;
if (hv) {
(void) hv_iterinit(hv);
if (! SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
i = HvKEYS(hv);
else {
while (hv_iternext(hv))
i++;
}
}
sv_setiv(sv, (IV)i);
return 0;
}
int
Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
{
if (LvTARG(sv)) {
hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
}
return 0;
}
/* caller is responsible for stack switching/cleanup */
STATIC int
S_magic_methcall(pTHX_ SV *sv, MAGIC *mg, char *meth, I32 flags, int n, SV *val)
{
dSP;
PUSHMARK(SP);
EXTEND(SP, n);
PUSHs(SvTIED_obj(sv, mg));
if (n > 1) {
if (mg->mg_ptr) {
if (mg->mg_len >= 0)
PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
else if (mg->mg_len == HEf_SVKEY)
PUSHs((SV*)mg->mg_ptr);
}
else if (mg->mg_type == PERL_MAGIC_tiedelem) {
PUSHs(sv_2mortal(newSViv(mg->mg_len)));
}
}
if (n > 2) {
PUSHs(val);
}
PUTBACK;
return call_method(meth, flags);
}
STATIC int
S_magic_methpack(pTHX_ SV *sv, MAGIC *mg, char *meth)
{
dSP;
ENTER;
SAVETMPS;
PUSHSTACKi(PERLSI_MAGIC);
if (magic_methcall(sv, mg, meth, G_SCALAR, 2, NULL)) {
sv_setsv(sv, *PL_stack_sp--);
}
POPSTACK;
FREETMPS;
LEAVE;
return 0;
}
int
Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
{
magic_methpack(sv,mg,"FETCH");
if (mg->mg_ptr)
mg->mg_flags |= MGf_GSKIP;
return 0;
}
int
Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
{
dSP;
ENTER;
PUSHSTACKi(PERLSI_MAGIC);
magic_methcall(sv, mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
POPSTACK;
LEAVE;
return 0;
}
int
Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
{
return magic_methpack(sv,mg,"DELETE");
}
U32
Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
{
dSP;
U32 retval = 0;
ENTER;
SAVETMPS;
PUSHSTACKi(PERLSI_MAGIC);
if (magic_methcall(sv, mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
sv = *PL_stack_sp--;
retval = (U32) SvIV(sv)-1;
}
POPSTACK;
FREETMPS;
LEAVE;
return retval;
}
int
Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
{
dSP;
ENTER;
PUSHSTACKi(PERLSI_MAGIC);
PUSHMARK(SP);
XPUSHs(SvTIED_obj(sv, mg));
PUTBACK;
call_method("CLEAR", G_SCALAR|G_DISCARD);
POPSTACK;
LEAVE;
return 0;
}
int
Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
{
dSP;
const char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
ENTER;
SAVETMPS;
PUSHSTACKi(PERLSI_MAGIC);
PUSHMARK(SP);
EXTEND(SP, 2);
PUSHs(SvTIED_obj(sv, mg));
if (SvOK(key))
PUSHs(key);
PUTBACK;
if (call_method(meth, G_SCALAR))
sv_setsv(key, *PL_stack_sp--);
POPSTACK;
FREETMPS;
LEAVE;
return 0;
}
int
Perl_magic_existspack(pTHX_ SV *sv, MAGIC *mg)
{
return magic_methpack(sv,mg,"EXISTS");
}
int
Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
{
OP *o;
I32 i;
GV* gv;
SV** svp;
STRLEN n_a;
gv = PL_DBline;
i = SvTRUE(sv);
svp = av_fetch(GvAV(gv),
atoi(MgPV(mg,n_a)), FALSE);
if (svp && SvIOKp(*svp) && (o = INT2PTR(OP*,SvIVX(*svp))))
o->op_private = (U8)i;
return 0;
}
int
Perl_magic_getarylen(pTHX_ SV *sv, MAGIC *mg)
{
sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
return 0;
}
int
Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
{
av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
return 0;
}
int
Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
{
SV* lsv = LvTARG(sv);
if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
mg = mg_find(lsv, PERL_MAGIC_regex_global);
if (mg && mg->mg_len >= 0) {
I32 i = mg->mg_len;
if (DO_UTF8(lsv))
sv_pos_b2u(lsv, &i);
sv_setiv(sv, i + PL_curcop->cop_arybase);
return 0;
}
}
(void)SvOK_off(sv);
return 0;
}
int
Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
{
SV* lsv = LvTARG(sv);
SSize_t pos;
STRLEN len;
STRLEN ulen = 0;
mg = 0;
if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
mg = mg_find(lsv, PERL_MAGIC_regex_global);
if (!mg) {
if (!SvOK(sv))
return 0;
sv_magic(lsv, (SV*)0, PERL_MAGIC_regex_global, Nullch, 0);
mg = mg_find(lsv, PERL_MAGIC_regex_global);
}
else if (!SvOK(sv)) {
mg->mg_len = -1;
return 0;
}
len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
pos = SvIV(sv) - PL_curcop->cop_arybase;
if (DO_UTF8(lsv)) {
ulen = sv_len_utf8(lsv);
if (ulen)
len = ulen;
}
if (pos < 0) {
pos += len;
if (pos < 0)
pos = 0;
}
else if (pos > (SSize_t)len)
pos = len;
if (ulen) {
I32 p = pos;
sv_pos_u2b(lsv, &p, 0);
pos = p;
}
mg->mg_len = pos;
mg->mg_flags &= ~MGf_MINMATCH;
return 0;
}
int
Perl_magic_getglob(pTHX_ SV *sv, MAGIC *mg)
{
if (SvFAKE(sv)) { /* FAKE globs can get coerced */
SvFAKE_off(sv);
gv_efullname3(sv,((GV*)sv), "*");
SvFAKE_on(sv);
}
else
gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
return 0;
}
int
Perl_magic_setglob(pTHX_ SV *sv, MAGIC *mg)
{
register char *s;
GV* gv;
STRLEN n_a;
if (!SvOK(sv))
return 0;
s = SvPV(sv, n_a);
if (*s == '*' && s[1])
s++;
gv = gv_fetchpv(s,TRUE, SVt_PVGV);
if (sv == (SV*)gv)
return 0;
if (GvGP(sv))
gp_free((GV*)sv);
GvGP(sv) = gp_ref(GvGP(gv));
return 0;
}
int
Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
{
STRLEN len;
SV *lsv = LvTARG(sv);
char *tmps = SvPV(lsv,len);
I32 offs = LvTARGOFF(sv);
I32 rem = LvTARGLEN(sv);
if (SvUTF8(lsv))
sv_pos_u2b(lsv, &offs, &rem);
if (offs > (I32)len)
offs = len;
if (rem + offs > (I32)len)
rem = len - offs;
sv_setpvn(sv, tmps + offs, (STRLEN)rem);
if (SvUTF8(lsv))
SvUTF8_on(sv);
return 0;
}
int
Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
{
STRLEN len;
char *tmps = SvPV(sv, len);
SV *lsv = LvTARG(sv);
I32 lvoff = LvTARGOFF(sv);
I32 lvlen = LvTARGLEN(sv);
if (DO_UTF8(sv)) {
sv_utf8_upgrade(lsv);
sv_pos_u2b(lsv, &lvoff, &lvlen);
sv_insert(lsv, lvoff, lvlen, tmps, len);
SvUTF8_on(lsv);
}
else if (lsv && SvUTF8(lsv)) {
sv_pos_u2b(lsv, &lvoff, &lvlen);
tmps = (char*)bytes_to_utf8((U8*)tmps, &len);
sv_insert(lsv, lvoff, lvlen, tmps, len);
Safefree(tmps);
}
else
sv_insert(lsv, lvoff, lvlen, tmps, len);
return 0;
}
int
Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
{
TAINT_IF((mg->mg_len & 1) ||
((mg->mg_len & 2) && mg->mg_obj == sv)); /* kludge */
return 0;
}
int
Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
{
if (PL_localizing) {
if (PL_localizing == 1)
mg->mg_len <<= 1;
else
mg->mg_len >>= 1;
}
else if (PL_tainted)
mg->mg_len |= 1;
else
mg->mg_len &= ~1;
return 0;
}
int
Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
{
SV *lsv = LvTARG(sv);
if (!lsv) {
(void)SvOK_off(sv);
return 0;
}
sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
return 0;
}
int
Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
{
do_vecset(sv); /* XXX slurp this routine */
return 0;
}
int
Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
{
SV *targ = Nullsv;
if (LvTARGLEN(sv)) {
if (mg->mg_obj) {
SV *ahv = LvTARG(sv);
if (SvTYPE(ahv) == SVt_PVHV) {
HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
if (he)
targ = HeVAL(he);
}
else {
SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, FALSE, 0);
if (svp)
targ = *svp;
}
}
else {
AV* av = (AV*)LvTARG(sv);
if ((I32)LvTARGOFF(sv) <= AvFILL(av))
targ = AvARRAY(av)[LvTARGOFF(sv)];
}
if (targ && targ != &PL_sv_undef) {
/* somebody else defined it for us */
SvREFCNT_dec(LvTARG(sv));
LvTARG(sv) = SvREFCNT_inc(targ);
LvTARGLEN(sv) = 0;
SvREFCNT_dec(mg->mg_obj);
mg->mg_obj = Nullsv;
mg->mg_flags &= ~MGf_REFCOUNTED;
}
}
else
targ = LvTARG(sv);
sv_setsv(sv, targ ? targ : &PL_sv_undef);
return 0;
}
int
Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
{
if (LvTARGLEN(sv))
vivify_defelem(sv);
if (LvTARG(sv)) {
sv_setsv(LvTARG(sv), sv);
SvSETMAGIC(LvTARG(sv));
}
return 0;
}
void
Perl_vivify_defelem(pTHX_ SV *sv)
{
MAGIC *mg;
SV *value = Nullsv;
if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
return;
if (mg->mg_obj) {
SV *ahv = LvTARG(sv);
STRLEN n_a;
if (SvTYPE(ahv) == SVt_PVHV) {
HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
if (he)
value = HeVAL(he);
}
else {
SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, TRUE, 0);
if (svp)
value = *svp;
}
if (!value || value == &PL_sv_undef)
Perl_croak(aTHX_ PL_no_helem, SvPV(mg->mg_obj, n_a));
}
else {
AV* av = (AV*)LvTARG(sv);
if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
LvTARG(sv) = Nullsv; /* array can't be extended */
else {
SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
if (!svp || (value = *svp) == &PL_sv_undef)
Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
}
}
(void)SvREFCNT_inc(value);
SvREFCNT_dec(LvTARG(sv));
LvTARG(sv) = value;
LvTARGLEN(sv) = 0;
SvREFCNT_dec(mg->mg_obj);
mg->mg_obj = Nullsv;
mg->mg_flags &= ~MGf_REFCOUNTED;
}
int
Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
{
AV *av = (AV*)mg->mg_obj;
SV **svp = AvARRAY(av);
I32 i = AvFILLp(av);
while (i >= 0) {
if (svp[i] && svp[i] != &PL_sv_undef) {
if (!SvWEAKREF(svp[i]))
Perl_croak(aTHX_ "panic: magic_killbackrefs");
/* XXX Should we check that it hasn't changed? */
SvRV(svp[i]) = 0;
(void)SvOK_off(svp[i]);
SvWEAKREF_off(svp[i]);
svp[i] = &PL_sv_undef;
}
i--;
}
return 0;
}
int
Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
{
mg->mg_len = -1;
SvSCREAM_off(sv);
return 0;
}
int
Perl_magic_setbm(pTHX_ SV *sv, MAGIC *mg)
{
sv_unmagic(sv, PERL_MAGIC_bm);
SvVALID_off(sv);
return 0;
}
int
Perl_magic_setfm(pTHX_ SV *sv, MAGIC *mg)
{
sv_unmagic(sv, PERL_MAGIC_fm);
SvCOMPILED_off(sv);
return 0;
}
int
Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
{
struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
if (uf && uf->uf_set)
(*uf->uf_set)(aTHX_ uf->uf_index, sv);
return 0;
}
int
Perl_magic_freeregexp(pTHX_ SV *sv, MAGIC *mg)
{
regexp *re = (regexp *)mg->mg_obj;
ReREFCNT_dec(re);
return 0;
}
#ifdef USE_LOCALE_COLLATE
int
Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
{
/*
* RenE<eacute> Descartes said "I think not."
* and vanished with a faint plop.
*/
if (mg->mg_ptr) {
Safefree(mg->mg_ptr);
mg->mg_ptr = NULL;
mg->mg_len = -1;
}
return 0;
}
#endif /* USE_LOCALE_COLLATE */
int
Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
{
register char *s;
I32 i;
STRLEN len;
switch (*mg->mg_ptr) {
case '\001': /* ^A */
sv_setsv(PL_bodytarget, sv);
break;
case '\003': /* ^C */
PL_minus_c = (bool)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
break;
case '\004': /* ^D */
PL_debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | DEBUG_TOP_FLAG;
DEBUG_x(dump_all());
break;
case '\005': /* ^E */
if (*(mg->mg_ptr+1) == '\0') {
#ifdef MACOS_TRADITIONAL
gMacPerl_OSErr = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
#else
# ifdef VMS
set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
# else
# ifdef WIN32
SetLastError( SvIV(sv) );
# else
# ifdef OS2
os2_setsyserrno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
# else
/* will anyone ever use this? */
SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
# endif
# endif
# endif
#endif
}
else if (strEQ(mg->mg_ptr+1, "NCODING")) {
if (PL_encoding)
sv_setsv(PL_encoding, sv);
else
PL_encoding = newSVsv(sv);
}
case '\006': /* ^F */
PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
break;
case '\010': /* ^H */
PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
break;
case '\011': /* ^I */ /* NOT \t in EBCDIC */
if (PL_inplace)
Safefree(PL_inplace);
if (SvOK(sv))
PL_inplace = savepv(SvPV(sv,len));
else
PL_inplace = Nullch;
break;
case '\017': /* ^O */
if (*(mg->mg_ptr+1) == '\0') {
if (PL_osname)
Safefree(PL_osname);
if (SvOK(sv))
PL_osname = savepv(SvPV(sv,len));
else
PL_osname = Nullch;
}
else if (strEQ(mg->mg_ptr, "\017PEN")) {
if (!PL_compiling.cop_io)
PL_compiling.cop_io = newSVsv(sv);
else
sv_setsv(PL_compiling.cop_io,sv);
}
break;
case '\020': /* ^P */
PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
if (PL_perldb && !PL_DBsingle)
init_debugger();
break;
case '\024': /* ^T */
#ifdef BIG_TIME
PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
#else
PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
#endif
break;
case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
if (*(mg->mg_ptr+1) == '\0') {
if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
PL_dowarn = (PL_dowarn & ~G_WARN_ON)
| (i ? G_WARN_ON : G_WARN_OFF) ;
}
}
else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
if (!SvPOK(sv) && PL_localizing) {
sv_setpvn(sv, WARN_NONEstring, WARNsize);
PL_compiling.cop_warnings = pWARN_NONE;
break;
}
{
STRLEN len, i;
int accumulate = 0 ;
int any_fatals = 0 ;
char * ptr = (char*)SvPV(sv, len) ;
for (i = 0 ; i < len ; ++i) {
accumulate |= ptr[i] ;
any_fatals |= (ptr[i] & 0xAA) ;
}
if (!accumulate)
PL_compiling.cop_warnings = pWARN_NONE;
else if (isWARN_on(sv, WARN_ALL) && !any_fatals) {
PL_compiling.cop_warnings = pWARN_ALL;
PL_dowarn |= G_WARN_ONCE ;
}
else {
if (specialWARN(PL_compiling.cop_warnings))
PL_compiling.cop_warnings = newSVsv(sv) ;
else
sv_setsv(PL_compiling.cop_warnings, sv);
if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
PL_dowarn |= G_WARN_ONCE ;
}
}
}
}
else if (strEQ(mg->mg_ptr+1, "IDE_SYSTEM_CALLS"))
PL_widesyscalls = (bool)SvTRUE(sv);
break;
case '.':
if (PL_localizing) {
if (PL_localizing == 1)
SAVESPTR(PL_last_in_gv);
}
else if (SvOK(sv) && GvIO(PL_last_in_gv))
IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
break;
case '^':
Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
break;
case '~':
Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,len));
IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
break;
case '=':
IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
break;
case '-':
IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
break;
case '%':
IoPAGE(GvIOp(PL_defoutgv)) = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
break;
case '|':
{
IO *io = GvIOp(PL_defoutgv);
if(!io)
break;
if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
IoFLAGS(io) &= ~IOf_FLUSH;
else {
if (!(IoFLAGS(io) & IOf_FLUSH)) {
PerlIO *ofp = IoOFP(io);
if (ofp)
(void)PerlIO_flush(ofp);
IoFLAGS(io) |= IOf_FLUSH;
}
}
}
break;
case '*':
i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
PL_multiline = (i != 0);
break;
case '/':
SvREFCNT_dec(PL_rs);
PL_rs = newSVsv(sv);
break;
case '\\':
if (PL_ors_sv)
SvREFCNT_dec(PL_ors_sv);
if (SvOK(sv) || SvGMAGICAL(sv)) {
PL_ors_sv = newSVsv(sv);
}
else {
PL_ors_sv = Nullsv;
}
break;
case ',':
if (PL_ofs_sv)
SvREFCNT_dec(PL_ofs_sv);
if (SvOK(sv) || SvGMAGICAL(sv)) {
PL_ofs_sv = newSVsv(sv);
}
else {
PL_ofs_sv = Nullsv;
}
break;
case '#':
if (PL_ofmt)
Safefree(PL_ofmt);
PL_ofmt = savepv(SvPV(sv,len));
break;
case '[':
PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
break;
case '?':
#ifdef COMPLEX_STATUS
if (PL_localizing == 2) {
PL_statusvalue = LvTARGOFF(sv);
PL_statusvalue_vms = LvTARGLEN(sv);
}
else
#endif
#ifdef VMSISH_STATUS
if (VMSISH_STATUS)
STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
else
#endif
STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
break;
case '!':
SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
(SvIV(sv) == EVMSERR) ? 4 : vaxc$errno);
break;
case '<':
PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
if (PL_delaymagic) {
PL_delaymagic |= DM_RUID;
break; /* don't do magic till later */
}
#ifdef HAS_SETRUID
(void)setruid((Uid_t)PL_uid);
#else
#ifdef HAS_SETREUID
(void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
#else
#ifdef HAS_SETRESUID
(void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
#else
if (PL_uid == PL_euid) /* special case $< = $> */
(void)PerlProc_setuid(PL_uid);
else {
PL_uid = PerlProc_getuid();
Perl_croak(aTHX_ "setruid() not implemented");
}
#endif
#endif
#endif
PL_uid = PerlProc_getuid();
PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
break;
case '>':
PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
if (PL_delaymagic) {
PL_delaymagic |= DM_EUID;
break; /* don't do magic till later */
}
#ifdef HAS_SETEUID
(void)seteuid((Uid_t)PL_euid);
#else
#ifdef HAS_SETREUID
(void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
#else
#ifdef HAS_SETRESUID
(void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
#else
if (PL_euid == PL_uid) /* special case $> = $< */
PerlProc_setuid(PL_euid);
else {
PL_euid = PerlProc_geteuid();
Perl_croak(aTHX_ "seteuid() not implemented");
}
#endif
#endif
#endif
PL_euid = PerlProc_geteuid();
PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
break;
case '(':
PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
if (PL_delaymagic) {
PL_delaymagic |= DM_RGID;
break; /* don't do magic till later */
}
#ifdef HAS_SETRGID
(void)setrgid((Gid_t)PL_gid);
#else
#ifdef HAS_SETREGID
(void)setregid((Gid_t)PL_gid, (Gid_t)-1);
#else
#ifdef HAS_SETRESGID
(void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
#else
if (PL_gid == PL_egid) /* special case $( = $) */
(void)PerlProc_setgid(PL_gid);
else {
PL_gid = PerlProc_getgid();
Perl_croak(aTHX_ "setrgid() not implemented");
}
#endif
#endif
#endif
PL_gid = PerlProc_getgid();
PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
break;
case ')':
#ifdef HAS_SETGROUPS
{
char *p = SvPV(sv, len);
Groups_t gary[NGROUPS];
while (isSPACE(*p))
++p;
PL_egid = Atol(p);
for (i = 0; i < NGROUPS; ++i) {
while (*p && !isSPACE(*p))
++p;
while (isSPACE(*p))
++p;
if (!*p)
break;
gary[i] = Atol(p);
}
if (i)
(void)setgroups(i, gary);
}
#else /* HAS_SETGROUPS */
PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
#endif /* HAS_SETGROUPS */
if (PL_delaymagic) {
PL_delaymagic |= DM_EGID;
break; /* don't do magic till later */
}
#ifdef HAS_SETEGID
(void)setegid((Gid_t)PL_egid);
#else
#ifdef HAS_SETREGID
(void)setregid((Gid_t)-1, (Gid_t)PL_egid);
#else
#ifdef HAS_SETRESGID
(void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
#else
if (PL_egid == PL_gid) /* special case $) = $( */
(void)PerlProc_setgid(PL_egid);
else {
PL_egid = PerlProc_getegid();
Perl_croak(aTHX_ "setegid() not implemented");
}
#endif
#endif
#endif
PL_egid = PerlProc_getegid();
PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
break;
case ':':
PL_chopset = SvPV_force(sv,len);
break;
#ifndef MACOS_TRADITIONAL
case '0':
#ifdef HAS_SETPROCTITLE
/* The BSDs don't show the argv[] in ps(1) output, they
* show a string from the process struct and provide
* the setproctitle() routine to manipulate that. */
{
s = SvPV(sv, len);
# if __FreeBSD_version > 410001
/* The leading "-" removes the "perl: " prefix,
* but not the "(perl) suffix from the ps(1)
* output, because that's what ps(1) shows if the
* argv[] is modified. */
setproctitle("-%s", s);
# else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
/* This doesn't really work if you assume that
* $0 = 'foobar'; will wipe out 'perl' from the $0
* because in ps(1) output the result will be like
* sprintf("perl: %s (perl)", s)
* I guess this is a security feature:
* one (a user process) cannot get rid of the original name.
* --jhi */
setproctitle("%s", s);
# endif
}
#endif
if (!PL_origalen) {
s = PL_origargv[0];
s += strlen(s);
/* See if all the arguments are contiguous in memory */
for (i = 1; i < PL_origargc; i++) {
if (PL_origargv[i] == s + 1
#ifdef OS2
|| PL_origargv[i] == s + 2
#endif
)
{
++s;
s += strlen(s); /* this one is ok too */
}
else
break;
}
/* can grab env area too? */
if (PL_origenviron
#ifdef USE_ITHREADS
&& PL_curinterp == aTHX
#endif
&& (PL_origenviron[0] == s + 1))
{
my_setenv("NoNe SuCh", Nullch);
/* force copy of environment */
for (i = 0; PL_origenviron[i]; i++)
if (PL_origenviron[i] == s + 1) {
++s;
s += strlen(s);
}
else
break;
}
PL_origalen = s - PL_origargv[0];
}
s = SvPV_force(sv,len);
i = len;
if (i >= (I32)PL_origalen) {
i = PL_origalen;
/* don't allow system to limit $0 seen by script */
/* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
Copy(s, PL_origargv[0], i, char);
s = PL_origargv[0]+i;
*s = '\0';
}
else {
Copy(s, PL_origargv[0], i, char);
s = PL_origargv[0]+i;
*s++ = '\0';
while (++i < (I32)PL_origalen)
*s++ = '\0';
for (i = 1; i < PL_origargc; i++)
PL_origargv[i] = Nullch;
}
break;
#endif
#ifdef USE_5005THREADS
case '@':
sv_setsv(thr->errsv, sv);
break;
#endif /* USE_5005THREADS */
}
return 0;
}
#ifdef USE_5005THREADS
int
Perl_magic_mutexfree(pTHX_ SV *sv, MAGIC *mg)
{
DEBUG_S(PerlIO_printf(Perl_debug_log,
"0x%"UVxf": magic_mutexfree 0x%"UVxf"\n",
PTR2UV(thr), PTR2UV(sv)));
if (MgOWNER(mg))
Perl_croak(aTHX_ "panic: magic_mutexfree");
MUTEX_DESTROY(MgMUTEXP(mg));
COND_DESTROY(MgCONDP(mg));
return 0;
}
#endif /* USE_5005THREADS */
I32
Perl_whichsig(pTHX_ char *sig)
{
register char **sigv;
for (sigv = PL_sig_name+1; *sigv; sigv++)
if (strEQ(sig,*sigv))
return PL_sig_num[sigv - PL_sig_name];
#ifdef SIGCLD
if (strEQ(sig,"CHLD"))
return SIGCLD;
#endif
#ifdef SIGCHLD
if (strEQ(sig,"CLD"))
return SIGCHLD;
#endif
return 0;
}
#if !defined(PERL_IMPLICIT_CONTEXT)
static SV* sig_sv;
#endif
Signal_t
Perl_sighandler(int sig)
{
#ifdef PERL_GET_SIG_CONTEXT
dTHXa(PERL_GET_SIG_CONTEXT);
#else
dTHX;
#endif
dSP;
GV *gv = Nullgv;
HV *st;
SV *sv = Nullsv, *tSv = PL_Sv;
CV *cv = Nullcv;
OP *myop = PL_op;
U32 flags = 0;
XPV *tXpv = PL_Xpv;
if (PL_savestack_ix + 15 <= PL_savestack_max)
flags |= 1;
if (PL_markstack_ptr < PL_markstack_max - 2)
flags |= 4;
if (PL_retstack_ix < PL_retstack_max - 2)
flags |= 8;
if (PL_scopestack_ix < PL_scopestack_max - 3)
flags |= 16;
if (!PL_psig_ptr[sig]) {
PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
PL_sig_name[sig]);
exit(sig);
}
/* Max number of items pushed there is 3*n or 4. We cannot fix
infinity, so we fix 4 (in fact 5): */
if (flags & 1) {
PL_savestack_ix += 5; /* Protect save in progress. */
SAVEDESTRUCTOR_X(unwind_handler_stack, (void*)&flags);
}
if (flags & 4)
PL_markstack_ptr++; /* Protect mark. */
if (flags & 8) {
PL_retstack_ix++;
PL_retstack[PL_retstack_ix] = NULL;
}
if (flags & 16)
PL_scopestack_ix += 1;
/* sv_2cv is too complicated, try a simpler variant first: */
if (!SvROK(PL_psig_ptr[sig]) || !(cv = (CV*)SvRV(PL_psig_ptr[sig]))
|| SvTYPE(cv) != SVt_PVCV)
cv = sv_2cv(PL_psig_ptr[sig],&st,&gv,TRUE);
if (!cv || !CvROOT(cv)) {
if (ckWARN(WARN_SIGNAL))
Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
PL_sig_name[sig], (gv ? GvENAME(gv)
: ((cv && CvGV(cv))
? GvENAME(CvGV(cv))
: "__ANON__")));
goto cleanup;
}
if(PL_psig_name[sig]) {
sv = SvREFCNT_inc(PL_psig_name[sig]);
flags |= 64;
#if !defined(PERL_IMPLICIT_CONTEXT)
sig_sv = sv;
#endif
} else {
sv = sv_newmortal();
sv_setpv(sv,PL_sig_name[sig]);
}
PUSHSTACKi(PERLSI_SIGNAL);
PUSHMARK(SP);
PUSHs(sv);
PUTBACK;
call_sv((SV*)cv, G_DISCARD|G_EVAL);
POPSTACK;
if (SvTRUE(ERRSV)) {
#ifndef PERL_MICRO
#ifdef HAS_SIGPROCMASK
/* Handler "died", for example to get out of a restart-able read().
* Before we re-do that on its behalf re-enable the signal which was
* blocked by the system when we entered.
*/
sigset_t set;
sigemptyset(&set);
sigaddset(&set,sig);
sigprocmask(SIG_UNBLOCK, &set, NULL);
#else
/* Not clear if this will work */
(void)rsignal(sig, SIG_IGN);
(void)rsignal(sig, &Perl_csighandler);
#endif
#endif /* !PERL_MICRO */
Perl_die(aTHX_ Nullformat);
}
cleanup:
if (flags & 1)
PL_savestack_ix -= 8; /* Unprotect save in progress. */
if (flags & 4)
PL_markstack_ptr--;
if (flags & 8)
PL_retstack_ix--;
if (flags & 16)
PL_scopestack_ix -= 1;
if (flags & 64)
SvREFCNT_dec(sv);
PL_op = myop; /* Apparently not needed... */
PL_Sv = tSv; /* Restore global temporaries. */
PL_Xpv = tXpv;
return;
}
static void
restore_magic(pTHX_ void *p)
{
MGS* mgs = SSPTR(PTR2IV(p), MGS*);
SV* sv = mgs->mgs_sv;
if (!sv)
return;
if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
{
if (mgs->mgs_flags)
SvFLAGS(sv) |= mgs->mgs_flags;
else
mg_magical(sv);
if (SvGMAGICAL(sv))
SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
}
mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
/* If we're still on top of the stack, pop us off. (That condition
* will be satisfied if restore_magic was called explicitly, but *not*
* if it's being called via leave_scope.)
* The reason for doing this is that otherwise, things like sv_2cv()
* may leave alloc gunk on the savestack, and some code
* (e.g. sighandler) doesn't expect that...
*/
if (PL_savestack_ix == mgs->mgs_ss_ix)
{
I32 popval = SSPOPINT;
assert(popval == SAVEt_DESTRUCTOR_X);
PL_savestack_ix -= 2;
popval = SSPOPINT;
assert(popval == SAVEt_ALLOC);
popval = SSPOPINT;
PL_savestack_ix -= popval;
}
}
static void
unwind_handler_stack(pTHX_ void *p)
{
U32 flags = *(U32*)p;
if (flags & 1)
PL_savestack_ix -= 5; /* Unprotect save in progress. */
/* cxstack_ix-- Not needed, die already unwound it. */
#if !defined(PERL_IMPLICIT_CONTEXT)
if (flags & 64)
SvREFCNT_dec(sig_sv);
#endif
}
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