FAQ sync.

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

diff --git a/sv.c b/sv.c
index 83e2973..21de7ed 100644 (file)
--- a/sv.c
+++ b/sv.c
@@ -1226,13 +1226,13 @@ You generally want to use the C<SvUPGRADE> macro wrapper. See also C<svtype>.
 bool
 Perl_sv_upgrade(pTHX_ register SV *sv, U32 mt)
 {
-    char*      pv;
-    U32                cur;
-    U32                len;
-    IV         iv;
-    NV         nv;
-    MAGIC*     magic;
-    HV*                stash;
+    char*      pv = NULL;
+    U32                cur = 0;
+    U32                len = 0;
+    IV         iv = 0;
+    NV         nv = 0.0;
+    MAGIC*     magic = NULL;
+    HV*                stash = Nullhv;
 
     if (mt != SVt_PV && SvREADONLY(sv) && SvFAKE(sv)) {
        sv_force_normal(sv);
@@ -1540,6 +1540,8 @@ Perl_sv_grow(pTHX_ register SV *sv, register STRLEN newlen)
 {
     register char *s;
 
+
+
 #ifdef HAS_64K_LIMIT
     if (newlen >= 0x10000) {
        PerlIO_printf(Perl_debug_log,
@@ -1565,6 +1567,7 @@ Perl_sv_grow(pTHX_ register SV *sv, register STRLEN newlen)
     }
     else
        s = SvPVX(sv);
+
     if (newlen > SvLEN(sv)) {          /* need more room? */
        if (SvLEN(sv) && s) {
 #if defined(MYMALLOC) && !defined(LEAKTEST)
@@ -1585,7 +1588,7 @@ Perl_sv_grow(pTHX_ register SV *sv, register STRLEN newlen)
            }
            New(703, s, newlen, char);
            if (SvPVX(sv) && SvCUR(sv)) {
-               Move(SvPVX(sv), s, SvCUR(sv), char);
+               Move(SvPVX(sv), s, (newlen < SvCUR(sv)) ? newlen : SvCUR(sv), char);
            }
        }
        SvPV_set(sv, s);
@@ -3152,10 +3155,10 @@ Perl_sv_2pv_flags(pTHX_ register SV *sv, STRLEN *lp, I32 flags)
 
 Copies a stringified representation of the source SV into the
 destination SV.  Automatically performs any necessary mg_get and
-coercion of numeric values into strings.  Guaranteed to preserve 
+coercion of numeric values into strings.  Guaranteed to preserve
 UTF-8 flag even from overloaded objects.  Similar in nature to
-sv_2pv[_flags] but operates directly on an SV instead of just the 
-string.  Mostly uses sv_2pv_flags to do its work, except when that 
+sv_2pv[_flags] but operates directly on an SV instead of just the
+string.  Mostly uses sv_2pv_flags to do its work, except when that
 would lose the UTF-8'ness of the PV.
 
 =cut
@@ -3917,7 +3920,6 @@ Perl_sv_setsv_flags(pTHX_ SV *dstr, register SV *sstr, I32 flags)
        }
        else {                          /* have to copy actual string */
            STRLEN len = SvCUR(sstr);
-
            SvGROW(dstr, len + 1);      /* inlined from sv_setpvn */
            Move(SvPVX(sstr),SvPVX(dstr),len,char);
            SvCUR_set(dstr, len);
@@ -4780,7 +4782,7 @@ S_sv_del_backref(pTHX_ SV *sv)
     SV **svp;
     I32 i;
     SV *tsv = SvRV(sv);
-    MAGIC *mg;
+    MAGIC *mg = NULL;
     if (!SvMAGICAL(tsv) || !(mg = mg_find(tsv, PERL_MAGIC_backref)))
        Perl_croak(aTHX_ "panic: del_backref");
     av = (AV *)mg->mg_obj;
@@ -6680,8 +6682,8 @@ possible to set C<*st> and C<*gvp> to the stash and GV associated with it.
 CV *
 Perl_sv_2cv(pTHX_ SV *sv, HV **st, GV **gvp, I32 lref)
 {
-    GV *gv;
-    CV *cv;
+    GV *gv = Nullgv;
+    CV *cv = Nullcv;
     STRLEN n_a;
 
     if (!sv)
@@ -6926,7 +6928,7 @@ C<SvPV_force> and C<SvPV_force_nomg>
 char *
 Perl_sv_pvn_force_flags(pTHX_ SV *sv, STRLEN *lp, I32 flags)
 {
-    char *s;
+    char *s = NULL;
 
     if (SvTHINKFIRST(sv) && !SvROK(sv))
        sv_force_normal(sv);
@@ -8590,6 +8592,7 @@ Perl_re_dup(pTHX_ REGEXP *r, CLONE_PARAMS *param)
        s->min_offset = r->substrs->data[i].min_offset;
        s->max_offset = r->substrs->data[i].max_offset;
        s->substr     = sv_dup_inc(r->substrs->data[i].substr, param);
+       s->utf8_substr = sv_dup_inc(r->substrs->data[i].utf8_substr, param);
     }
 
     ret->regstclass = NULL;
@@ -9986,6 +9989,12 @@ perl_clone_using(PerlInterpreter *proto_perl, UV flags,
 #endif
     PL_encoding                = sv_dup(proto_perl->Iencoding, param);
 
+#ifdef DEBUGGING
+    sv_setpvn(PERL_DEBUG_PAD(0), "", 0);       /* For regex debugging. */
+    sv_setpvn(PERL_DEBUG_PAD(1), "", 0);
+    sv_setpvn(PERL_DEBUG_PAD(2), "", 0);
+#endif
+
     /* Clone the regex array */
     PL_regex_padav = newAV();
     {