Use more plausible argument for 'cd' in example.

[perl5.git] / sv.c

diff --git a/sv.c b/sv.c
index ed7047e..826228b 100644 (file)
--- a/sv.c
+++ b/sv.c
@@ -131,6 +131,7 @@ static const char S_destroy[] = "DESTROY";
 /* ============================================================================
 
 =head1 Allocation and deallocation of SVs.
+
 An SV (or AV, HV, etc.) is allocated in two parts: the head (struct
 sv, av, hv...) contains type and reference count information, and for
 many types, a pointer to the body (struct xrv, xpv, xpviv...), which
@@ -769,7 +770,7 @@ Perl_sv_free_arenas(pTHX)
 
 /*
   Here are mid-level routines that manage the allocation of bodies out
-  of the various arenas.  There are 5 kinds of arenas:
+  of the various arenas.  There are 4 kinds of arenas:
 
   1. SV-head arenas, which are discussed and handled above
   2. regular body arenas
@@ -782,7 +783,7 @@ Perl_sv_free_arenas(pTHX)
   unused block of them is wasteful.  Also, several svtypes dont have
   bodies; the data fits into the sv-head itself.  The arena-root
   pointer thus has a few unused root-pointers (which may be hijacked
-  later for arena types 4,5)
+  later for arena type 4)
 
   3 differs from 2 as an optimization; some body types have several
   unused fields in the front of the structure (which are kept in-place
@@ -791,11 +792,6 @@ Perl_sv_free_arenas(pTHX)
   are decremented to point at the unused 'ghost' memory, knowing that
   the pointers are used with offsets to the real memory.
 
-
-=head1 SV-Body Allocation
-
-=cut
-
 Allocation of SV-bodies is similar to SV-heads, differing as follows;
 the allocation mechanism is used for many body types, so is somewhat
 more complicated, it uses arena-sets, and has no need for still-live
@@ -2872,7 +2868,7 @@ S_uiv_2buf(char *const buf, const IV iv, UV uv, const int is_uv, char **const pe
        uv = iv;
        sign = 0;
     } else {
-        uv = (iv == IV_MIN) ? (UV)iv : (UV)(-iv);
+        uv = -(UV)iv;
        sign = 1;
     }
     do {
@@ -4335,6 +4331,10 @@ Perl_sv_setsv_flags(pTHX_ SV *dstr, SV* sstr, const I32 flags)
        if (dtype < SVt_PVNV)
            sv_upgrade(dstr, SVt_PVNV);
        break;
+
+    case SVt_INVLIST:
+        invlist_clone(sstr, dstr);
+        break;
     default:
        {
        const char * const type = sv_reftype(sstr,0);
@@ -4352,7 +4352,6 @@ Perl_sv_setsv_flags(pTHX_ SV *dstr, SV* sstr, const I32 flags)
            sv_upgrade(dstr, SVt_REGEXP);
        break;
 
-       case SVt_INVLIST:
     case SVt_PVLV:
     case SVt_PVGV:
     case SVt_PVMG:
@@ -5165,9 +5164,8 @@ S_sv_uncow(pTHX_ SV * const sv, const U32 flags)
                 SvCUR_set(sv, cur);
                 *SvEND(sv) = '\0';
             }
-           if (len) {
-           } else {
-               unshare_hek(SvSHARED_HEK_FROM_PV(pvx));
+           if (! len) {
+                       unshare_hek(SvSHARED_HEK_FROM_PV(pvx));
            }
 #ifdef DEBUGGING
             if (DEBUG_C_TEST)
@@ -12597,7 +12595,7 @@ Perl_sv_vcatpvfn_flags(pTHX_ SV *const sv, const char *const pat, const STRLEN p
                             esignbuf[esignlen++] = plus;
                     }
                     else {
-                        uv = (iv == IV_MIN) ? (UV)iv : (UV)(-iv);
+                        uv = -(UV)iv;
                         esignbuf[esignlen++] = '-';
                     }
                 }