BOUND regex opcodes (\b, \B) could try to scan zero length UTF-8.

[p5sagit/p5-mst-13.2.git] / mg.c

diff --git a/mg.c b/mg.c
index bec0a82..660fa54 100644 (file)
--- a/mg.c
+++ b/mg.c
@@ -16,11 +16,6 @@
 #define PERL_IN_MG_C
 #include "perl.h"
 
-/* XXX If this causes problems, set i_unistd=undef in the hint file.  */
-#ifdef I_UNISTD
-# include <unistd.h>
-#endif
-
 #if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS)
 #  ifndef NGROUPS
 #    define NGROUPS 32
@@ -200,7 +195,7 @@ 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) {
@@ -348,7 +343,7 @@ Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
        else                    /* @- */
            return rx->lastparen;
     }
-    
+
     return (U32)-1;
 }
 
@@ -498,7 +493,7 @@ Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
 #ifdef MACOS_TRADITIONAL
        {
            char msg[256];
-           
+       
            sv_setnv(sv,(double)gMacPerl_OSErr);
            sv_setpv(sv, gMacPerl_OSErr ? GetSysErrText(gMacPerl_OSErr, msg) : "");     
        }
@@ -563,8 +558,16 @@ Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
        else
            sv_setsv(sv, &PL_sv_undef);
        break;
-    case '\017':               /* ^O */
-       sv_setpv(sv, PL_osname);
+    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);
@@ -596,10 +599,10 @@ Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
             }
             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, "\027IDE_SYSTEM_CALLS"))
@@ -936,11 +939,6 @@ Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
            cur += len+1;
     }
     FreeEnvironmentStrings(envv);
-#   else
-#      ifdef __CYGWIN__
-    I32 i;
-    for (i = 0; environ[i]; i++)
-       safesysfree(environ[i]);
 #      else
 #          ifndef PERL_USE_SAFE_PUTENV
     I32 i;
@@ -951,7 +949,6 @@ Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
        for (i = 0; environ[i]; i++)
            safesysfree(environ[i]);
 #          endif /* PERL_USE_SAFE_PUTENV */
-#      endif /* __CYGWIN__ */
 
     environ[0] = Nullch;
 
@@ -1126,7 +1123,7 @@ Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
        hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
     }
     return 0;
-}          
+}
 
 /* caller is responsible for stack switching/cleanup */
 STATIC int
@@ -1137,7 +1134,7 @@ S_magic_methcall(pTHX_ SV *sv, MAGIC *mg, char *meth, I32 flags, int n, SV *val)
     PUSHMARK(SP);
     EXTEND(SP, n);
     PUSHs(SvTIED_obj(sv, mg));
-    if (n > 1) { 
+    if (n > 1) {
        if (mg->mg_ptr) {
            if (mg->mg_len >= 0)
                PUSHs(sv_2mortal(newSVpvn(mg->mg_ptr, mg->mg_len)));
@@ -1205,7 +1202,7 @@ Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
 
 U32
 Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
-{         
+{
     dSP;
     U32 retval = 0;
 
@@ -1267,7 +1264,7 @@ int
 Perl_magic_existspack(pTHX_ SV *sv, MAGIC *mg)
 {
     return magic_methpack(sv,mg,"EXISTS");
-} 
+}
 
 int
 Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
@@ -1308,7 +1305,7 @@ int
 Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
 {
     SV* lsv = LvTARG(sv);
-    
+
     if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
        mg = mg_find(lsv, 'g');
        if (mg && mg->mg_len >= 0) {
@@ -1334,7 +1331,7 @@ Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
     dTHR;
 
     mg = 0;
-    
+
     if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
        mg = mg_find(lsv, 'g');
     if (!mg) {
@@ -1714,12 +1711,20 @@ Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
            PL_inplace = Nullch;
        break;
     case '\017':       /* ^O */
-       if (PL_osname)
-           Safefree(PL_osname);
-       if (SvOK(sv))
-           PL_osname = savepv(SvPV(sv,len));
-       else
-           PL_osname = Nullch;
+       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);
@@ -1737,7 +1742,7 @@ Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
        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) 
+               PL_dowarn = (PL_dowarn & ~G_WARN_ON)
                                | (i ? G_WARN_ON : G_WARN_OFF) ;
            }
        }
@@ -2043,7 +2048,7 @@ Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
                if (PL_origargv[i] == s + 1
 #ifdef OS2
                    || PL_origargv[i] == s + 2
-#endif 
+#endif
                   )
                {
                    ++s;
@@ -2056,7 +2061,7 @@ Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
            if (PL_origenviron && (PL_origenviron[0] == s + 1
 #ifdef OS2
                                || (PL_origenviron[0] == s + 9 && (s += 8))
-#endif 
+#endif
               )) {
                my_setenv("NoNe  SuCh", Nullch);
                                            /* force copy of environment */
@@ -2159,7 +2164,7 @@ Perl_sighandler(int sig)
 #if defined(WIN32) && defined(PERL_IMPLICIT_CONTEXT)
     PERL_SET_THX(aTHXo);       /* fake TLS, see above */
 #endif
-    
+
     if (PL_savestack_ix + 15 <= PL_savestack_max)
        flags |= 1;
     if (PL_markstack_ptr < PL_markstack_max - 2)
@@ -2180,7 +2185,7 @@ Perl_sighandler(int sig)
        o_save_i = PL_savestack_ix;
        SAVEDESTRUCTOR_X(unwind_handler_stack, (void*)&flags);
     }
-    if (flags & 4) 
+    if (flags & 4)
        PL_markstack_ptr++;             /* Protect mark. */
     if (flags & 8) {
        PL_retstack_ix++;
@@ -2189,7 +2194,7 @@ Perl_sighandler(int sig)
     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])) 
+    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);
 
@@ -2223,16 +2228,16 @@ Perl_sighandler(int sig)
 cleanup:
     if (flags & 1)
        PL_savestack_ix -= 8; /* Unprotect save in progress. */
-    if (flags & 4) 
+    if (flags & 4)
        PL_markstack_ptr--;
-    if (flags & 8) 
+    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;