$foo .= $bar doesn't warn if $foo is undefined, so simplify code.

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

diff --git a/sv.c b/sv.c
index 8e90234..08d9b6a 100644 (file)
--- a/sv.c
+++ b/sv.c
@@ -1738,7 +1738,11 @@ S_glob_2inpuv(pTHX_ GV *gv, STRLEN *len, bool want_number)
           can tail call us and return true.  */
        return (char *) 1;
     } else {
-       return SvPV(buffer, *len);
+       assert(SvPOK(buffer));
+       if (len) {
+           *len = SvCUR(buffer);
+       }
+       return SvPVX(buffer);
     }
 }
 
@@ -3883,12 +3887,14 @@ Perl_sv_setpv_mg(pTHX_ register SV *sv, register const char *ptr)
 /*
 =for apidoc sv_usepvn
 
-Tells an SV to use C<ptr> to find its string value.  Normally the string is
-stored inside the SV but sv_usepvn allows the SV to use an outside string.
-The C<ptr> should point to memory that was allocated by C<malloc>.  The
-string length, C<len>, must be supplied.  This function will realloc the
-memory pointed to by C<ptr>, so that pointer should not be freed or used by
-the programmer after giving it to sv_usepvn.  Does not handle 'set' magic.
+Tells an SV to use C<ptr> to find its string value.  Normally the
+string is stored inside the SV but sv_usepvn allows the SV to use an
+outside string.  The C<ptr> should point to memory that was allocated
+by C<malloc>.  The string length, C<len>, must be supplied.  This
+function will realloc (i.e. move) the memory pointed to by C<ptr>,
+so that pointer should not be freed or used by the programmer after
+giving it to sv_usepvn, and neither should any pointers from "behind"
+that pointer (e.g. ptr + 1) be used.  Does not handle 'set' magic.
 See C<sv_usepvn_mg>.
 
 =cut
@@ -10675,21 +10681,9 @@ Perl_ss_dup(pTHX_ PerlInterpreter *proto_perl, CLONE_PARAMS* param)
 #endif
                break;
            }
-       case SAVEt_COP_WARNINGS:
-           {
-               void *optr = POPPTR(ss,ix);
-               TOPPTR(nss,ix) = ptr = any_dup(optr, proto_perl);
-               if (ptr != optr) {
-                   /* We duped something in the interpreter structure.  */
-                   ptr = POPPTR(ss,ix);
-                   TOPPTR(nss,ix) = DUP_WARNINGS((STRLEN*)ptr);
-               } else {
-                   /* I don't think that this happens, but it would mean that
-                      we (didn't) dup something shared.  */
-                   ptr = POPPTR(ss,ix);
-                   TOPPTR(nss,ix) = ptr;
-               }
-           }
+       case SAVEt_COMPILE_WARNINGS:
+           ptr = POPPTR(ss,ix);
+           TOPPTR(nss,ix) = DUP_WARNINGS((STRLEN*)ptr);
            break;
        default:
            Perl_croak(aTHX_ "panic: ss_dup inconsistency (%"IVdf")", (IV) i);