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perl 5.003_06: pod/perlmod.pod
[p5sagit/p5-mst-13.2.git] / scope.c
diff --git a/scope.c b/scope.c
index 44713e1..03cdddd 100644 (file)
--- a/scope.c
+++ b/scope.c
@@ -22,7 +22,7 @@ SV** p;
 int n;
 {
     stack_sp = sp;
-    av_extend(stack, (p - stack_base) + (n) + 128);
+    av_extend(curstack, (p - stack_base) + (n) + 128);
     return stack_sp;
 }
 
@@ -30,7 +30,7 @@ I32
 cxinc()
 {
     cxstack_max = cxstack_max * 3 / 2;
-    Renew(cxstack, cxstack_max, CONTEXT);
+    Renew(cxstack, cxstack_max + 1, CONTEXT);  /* XXX should fix CXINC macro */
     return cxstack_ix + 1;
 }
 
@@ -152,7 +152,7 @@ GV *gv;
     GP *ogp = GvGP(gv);
 
     SSCHECK(3);
-    SSPUSHPTR(gv);
+    SSPUSHPTR(SvREFCNT_inc(gv));
     SSPUSHPTR(ogp);
     SSPUSHINT(SAVEt_GP);
 
@@ -276,7 +276,7 @@ save_iv(ivp)
 IV *ivp;
 {
     SSCHECK(3);
-    SSPUSHINT(*ivp);
+    SSPUSHIV(*ivp);
     SSPUSHPTR(ivp);
     SSPUSHINT(SAVEt_IV);
 }
@@ -365,7 +365,7 @@ save_clearsv(svp)
 SV** svp;
 {
     SSCHECK(2);
-    SSPUSHPTR(svp);
+    SSPUSHLONG((long)(svp-curpad));
     SSPUSHINT(SAVEt_CLEARSV);
 }
 
@@ -518,13 +518,14 @@ I32 base;
            break;
        case SAVEt_NSTAB:
            gv = (GV*)SSPOPPTR;
-           (void)sv_clear(gv);
+           (void)sv_clear((SV*)gv);
            break;
         case SAVEt_GP:                         /* scalar reference */
            ptr = SSPOPPTR;
            gv = (GV*)SSPOPPTR;
             gp_free(gv);
             GvGP(gv) = (GP*)ptr;
+           SvREFCNT_dec(gv);
             break;
        case SAVEt_FREESV:
            ptr = SSPOPPTR;
@@ -540,7 +541,7 @@ I32 base;
            Safefree((char*)ptr);
            break;
        case SAVEt_CLEARSV:
-           ptr = SSPOPPTR;
+           ptr = (void*)&curpad[SSPOPLONG];
            sv = *(SV**)ptr;
            if (SvREFCNT(sv) <= 1) { /* Can clear pad variable in place. */
                if (SvTHINKFIRST(sv)) {
@@ -573,12 +574,14 @@ I32 base;
                }
            }
            else {      /* Someone has a claim on this, so abandon it. */
+               U32 padflags = SvFLAGS(sv) & (SVs_PADBUSY|SVs_PADMY|SVs_PADTMP);
                SvREFCNT_dec(sv);       /* Cast current value to the winds. */
                switch (SvTYPE(sv)) {   /* Console ourselves with a new value */
                case SVt_PVAV:  *(SV**)ptr = (SV*)newAV();      break;
                case SVt_PVHV:  *(SV**)ptr = (SV*)newHV();      break;
                default:        *(SV**)ptr = NEWSV(0,0);        break;
                }
+               SvFLAGS(*(SV**)ptr) |= padflags; /* preserve pad nature */
            }
            break;
        case SAVEt_DELETE:
@@ -593,7 +596,10 @@ I32 base;
            (*SSPOPDPTR)(ptr);
            break;
        case SAVEt_REGCONTEXT:
-           savestack_ix -= SSPOPINT;   /* regexp must have croaked */
+           {
+               I32 delta = SSPOPINT;
+               savestack_ix -= delta;  /* regexp must have croaked */
+           }
            break;
        default:
            croak("panic: leave_scope inconsistency");
@@ -602,91 +608,93 @@ I32 base;
 }
 
 #ifdef DEBUGGING
+
 void
 cx_dump(cx)
 CONTEXT* cx;
 {
-    fprintf(stderr, "CX %d = %s\n", cx - cxstack, block_type[cx->cx_type]);
+    PerlIO_printf(Perl_debug_log, "CX %d = %s\n", cx - cxstack, block_type[cx->cx_type]);
     if (cx->cx_type != CXt_SUBST) {
-       fprintf(stderr, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
-       fprintf(stderr, "BLK_OLDCOP = 0x%lx\n", (long)cx->blk_oldcop);
-       fprintf(stderr, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
-       fprintf(stderr, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
-       fprintf(stderr, "BLK_OLDRETSP = %ld\n", (long)cx->blk_oldretsp);
-       fprintf(stderr, "BLK_OLDPM = 0x%lx\n", (long)cx->blk_oldpm);
-       fprintf(stderr, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
+       PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
+       PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%lx\n", (long)cx->blk_oldcop);
+       PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
+       PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
+       PerlIO_printf(Perl_debug_log, "BLK_OLDRETSP = %ld\n", (long)cx->blk_oldretsp);
+       PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%lx\n", (long)cx->blk_oldpm);
+       PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
     }
     switch (cx->cx_type) {
     case CXt_NULL:
     case CXt_BLOCK:
        break;
     case CXt_SUB:
-       fprintf(stderr, "BLK_SUB.CV = 0x%lx\n",
+       PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%lx\n",
                (long)cx->blk_sub.cv);
-       fprintf(stderr, "BLK_SUB.GV = 0x%lx\n",
+       PerlIO_printf(Perl_debug_log, "BLK_SUB.GV = 0x%lx\n",
                (long)cx->blk_sub.gv);
-       fprintf(stderr, "BLK_SUB.DFOUTGV = 0x%lx\n",
+       PerlIO_printf(Perl_debug_log, "BLK_SUB.DFOUTGV = 0x%lx\n",
                (long)cx->blk_sub.dfoutgv);
-       fprintf(stderr, "BLK_SUB.OLDDEPTH = %ld\n",
+       PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
                (long)cx->blk_sub.olddepth);
-       fprintf(stderr, "BLK_SUB.HASARGS = %d\n",
+       PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
                (int)cx->blk_sub.hasargs);
        break;
     case CXt_EVAL:
-       fprintf(stderr, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
+       PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
                (long)cx->blk_eval.old_in_eval);
-       fprintf(stderr, "BLK_EVAL.OLD_OP_TYPE = %s\n",
-               op_name[cx->blk_eval.old_op_type]);
-       fprintf(stderr, "BLK_EVAL.OLD_NAME = %s\n",
+       PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
+               op_name[cx->blk_eval.old_op_type],
+               op_desc[cx->blk_eval.old_op_type]);
+       PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
                cx->blk_eval.old_name);
-       fprintf(stderr, "BLK_EVAL.OLD_EVAL_ROOT = 0x%lx\n",
+       PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%lx\n",
                (long)cx->blk_eval.old_eval_root);
        break;
 
     case CXt_LOOP:
-       fprintf(stderr, "BLK_LOOP.LABEL = %s\n",
+       PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n",
                cx->blk_loop.label);
-       fprintf(stderr, "BLK_LOOP.RESETSP = %ld\n",
+       PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
                (long)cx->blk_loop.resetsp);
-       fprintf(stderr, "BLK_LOOP.REDO_OP = 0x%lx\n",
+       PerlIO_printf(Perl_debug_log, "BLK_LOOP.REDO_OP = 0x%lx\n",
                (long)cx->blk_loop.redo_op);
-       fprintf(stderr, "BLK_LOOP.NEXT_OP = 0x%lx\n",
+       PerlIO_printf(Perl_debug_log, "BLK_LOOP.NEXT_OP = 0x%lx\n",
                (long)cx->blk_loop.next_op);
-       fprintf(stderr, "BLK_LOOP.LAST_OP = 0x%lx\n",
+       PerlIO_printf(Perl_debug_log, "BLK_LOOP.LAST_OP = 0x%lx\n",
                (long)cx->blk_loop.last_op);
-       fprintf(stderr, "BLK_LOOP.ITERIX = %ld\n",
+       PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
                (long)cx->blk_loop.iterix);
-       fprintf(stderr, "BLK_LOOP.ITERARY = 0x%lx\n",
+       PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%lx\n",
                (long)cx->blk_loop.iterary);
-       fprintf(stderr, "BLK_LOOP.ITERVAR = 0x%lx\n",
+       PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%lx\n",
                (long)cx->blk_loop.itervar);
        if (cx->blk_loop.itervar)
-           fprintf(stderr, "BLK_LOOP.ITERSAVE = 0x%lx\n",
+           PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERSAVE = 0x%lx\n",
                (long)cx->blk_loop.itersave);
        break;
 
     case CXt_SUBST:
-       fprintf(stderr, "SB_ITERS = %ld\n",
+       PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
                (long)cx->sb_iters);
-       fprintf(stderr, "SB_MAXITERS = %ld\n",
+       PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
                (long)cx->sb_maxiters);
-       fprintf(stderr, "SB_SAFEBASE = %ld\n",
+       PerlIO_printf(Perl_debug_log, "SB_SAFEBASE = %ld\n",
                (long)cx->sb_safebase);
-       fprintf(stderr, "SB_ONCE = %ld\n",
+       PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
                (long)cx->sb_once);
-       fprintf(stderr, "SB_ORIG = %s\n",
+       PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
                cx->sb_orig);
-       fprintf(stderr, "SB_DSTR = 0x%lx\n",
+       PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%lx\n",
                (long)cx->sb_dstr);
-       fprintf(stderr, "SB_TARG = 0x%lx\n",
+       PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%lx\n",
                (long)cx->sb_targ);
-       fprintf(stderr, "SB_S = 0x%lx\n",
+       PerlIO_printf(Perl_debug_log, "SB_S = 0x%lx\n",
                (long)cx->sb_s);
-       fprintf(stderr, "SB_M = 0x%lx\n",
+       PerlIO_printf(Perl_debug_log, "SB_M = 0x%lx\n",
                (long)cx->sb_m);
-       fprintf(stderr, "SB_STREND = 0x%lx\n",
+       PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%lx\n",
                (long)cx->sb_strend);
-       fprintf(stderr, "SB_SUBBASE = 0x%lx\n",
+       PerlIO_printf(Perl_debug_log, "SB_SUBBASE = 0x%lx\n",
                (long)cx->sb_subbase);
        break;
     }
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