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regen/regcharclass.pl: Comment, white-space only
[perl5.git] / pp_ctl.c
index 95727f2..0260a87 100644 (file)
--- a/pp_ctl.c
+++ b/pp_ctl.c
@@ -153,7 +153,7 @@ PP(pp_regcomp)
               modified by get-magic), to avoid incorrectly setting the
               RXf_TAINTED flag with RX_TAINT_on further down. */
            TAINT_set(was_tainted);
-#if NO_TAINT_SUPPORT
+#ifdef NO_TAINT_SUPPORT
             PERL_UNUSED_VAR(was_tainted);
 #endif
        }
@@ -696,6 +696,7 @@ PP(pp_formline)
 
        case FF_LINESNGL: /* process ^*  */
            chopspace = 0;
+            /* FALLTHROUGH */
 
        case FF_LINEGLOB: /* process @*  */
            {
@@ -836,10 +837,13 @@ PP(pp_formline)
            }
            /* Formats aren't yet marked for locales, so assume "yes". */
            {
-               STORE_NUMERIC_STANDARD_SET_LOCAL();
+                DECLARE_STORE_LC_NUMERIC_SET_TO_NEEDED();
                arg &= ~(FORM_NUM_POINT|FORM_NUM_BLANK);
+                /* we generate fmt ourselves so it is safe */
+                GCC_DIAG_IGNORE(-Wformat-nonliteral);
                my_snprintf(t, SvLEN(PL_formtarget) - (t - SvPVX(PL_formtarget)), fmt, (int) fieldsize, (int) arg, value);
-               RESTORE_NUMERIC_STANDARD();
+                GCC_DIAG_RESTORE;
+                RESTORE_LC_NUMERIC();
            }
            t += fieldsize;
            break;
@@ -935,7 +939,8 @@ PP(pp_grepstart)
     SAVEVPTR(PL_curpm);
 
     src = PL_stack_base[*PL_markstack_ptr];
-    if (SvPADTMP(src) && !IS_PADGV(src)) {
+    if (SvPADTMP(src)) {
+        assert(!IS_PADGV(src));
        src = PL_stack_base[*PL_markstack_ptr] = sv_mortalcopy(src);
        PL_tmps_floor++;
     }
@@ -1087,7 +1092,10 @@ PP(pp_mapwhile)
 
        /* set $_ to the new source item */
        src = PL_stack_base[PL_markstack_ptr[-1]];
-       if (SvPADTMP(src) && !IS_PADGV(src)) src = sv_mortalcopy(src);
+       if (SvPADTMP(src)) {
+            assert(!IS_PADGV(src));
+            src = sv_mortalcopy(src);
+        }
        SvTEMP_off(src);
        if (PL_op->op_private & OPpGREP_LEX)
            PAD_SVl(PL_op->op_targ) = src;
@@ -1177,25 +1185,33 @@ PP(pp_flop)
        SvGETMAGIC(right);
 
        if (RANGE_IS_NUMERIC(left,right)) {
-           IV i, j;
-           IV max;
+           IV i, j, n;
            if ((SvOK(left) && !SvIOK(left) && SvNV_nomg(left) < IV_MIN) ||
                (SvOK(right) && (SvIOK(right)
                                 ? SvIsUV(right) && SvUV(right) > IV_MAX
                                 : SvNV_nomg(right) > IV_MAX)))
                DIE(aTHX_ "Range iterator outside integer range");
            i = SvIV_nomg(left);
-           max = SvIV_nomg(right);
-           if (max >= i) {
-               j = max - i + 1;
-               if (j > SSize_t_MAX)
-                   Perl_croak(aTHX_ "Out of memory during list extend");
-               EXTEND_MORTAL(j);
-               EXTEND(SP, j);
+           j = SvIV_nomg(right);
+           if (j >= i) {
+                /* Dance carefully around signed max. */
+                bool overflow = (i <= 0 && j > SSize_t_MAX + i - 1);
+                if (!overflow) {
+                    n = j - i + 1;
+                    /* The wraparound of signed integers is undefined
+                     * behavior, but here we aim for count >=1, and
+                     * negative count is just wrong. */
+                    if (n < 1)
+                        overflow = TRUE;
+                }
+                if (overflow)
+                    Perl_croak(aTHX_ "Out of memory during list extend");
+               EXTEND_MORTAL(n);
+               EXTEND(SP, n);
            }
            else
-               j = 0;
-           while (j--) {
+               n = 0;
+           while (n--) {
                SV * const sv = sv_2mortal(newSViv(i++));
                PUSHs(sv);
            }
@@ -1393,6 +1409,7 @@ S_dopoptosub_at(pTHX_ const PERL_CONTEXT *cxstk, I32 startingblock)
              * code block. Hide this faked entry from the world. */
             if (cx->cx_type & CXp_SUB_RE_FAKE)
                 continue;
+            /* FALLTHROUGH */
        case CXt_EVAL:
        case CXt_FORMAT:
            DEBUG_l( Perl_deb(aTHX_ "(dopoptosub_at(): found sub at cx=%ld)\n", (long)i));
@@ -1696,17 +1713,17 @@ PP(pp_xor)
 /*
 =for apidoc caller_cx
 
-The XSUB-writer's equivalent of L<caller()|perlfunc/caller>. The
+The XSUB-writer's equivalent of L<caller()|perlfunc/caller>.  The
 returned C<PERL_CONTEXT> structure can be interrogated to find all the
-information returned to Perl by C<caller>. Note that XSUBs don't get a
+information returned to Perl by C<caller>.  Note that XSUBs don't get a
 stack frame, so C<caller_cx(0, NULL)> will return information for the
 immediately-surrounding Perl code.
 
 This function skips over the automatic calls to C<&DB::sub> made on the
-behalf of the debugger. If the stack frame requested was a sub called by
+behalf of the debugger.  If the stack frame requested was a sub called by
 C<DB::sub>, the return value will be the frame for the call to
 C<DB::sub>, since that has the correct line number/etc. for the call
-site. If I<dbcxp> is non-C<NULL>, it will be set to a pointer to the
+site.  If I<dbcxp> is non-C<NULL>, it will be set to a pointer to the
 frame for the sub call itself.
 
 =cut
@@ -1840,9 +1857,16 @@ PP(pp_caller)
     if (CxTYPE(cx) == CXt_EVAL) {
        /* eval STRING */
        if (CxOLD_OP_TYPE(cx) == OP_ENTEREVAL) {
-           PUSHs(newSVpvn_flags(SvPVX(cx->blk_eval.cur_text),
-                                SvCUR(cx->blk_eval.cur_text)-2,
-                                SvUTF8(cx->blk_eval.cur_text)|SVs_TEMP));
+            SV *cur_text = cx->blk_eval.cur_text;
+            if (SvCUR(cur_text) >= 2) {
+                PUSHs(newSVpvn_flags(SvPVX(cur_text), SvCUR(cur_text)-2,
+                                     SvUTF8(cur_text)|SVs_TEMP));
+            }
+            else {
+                /* I think this is will always be "", but be sure */
+                PUSHs(sv_2mortal(newSVsv(cur_text)));
+            }
+
            PUSHs(&PL_sv_no);
        }
        /* require */
@@ -2929,8 +2953,10 @@ PP(pp_goto) /* also pp_dump */
                       to freed memory as the result of undef *_.  So put
                       it in the calleeā€™s pad, donating our refer-
                       ence count. */
-                   SvREFCNT_dec(PAD_SVl(0));
-                   PAD_SVl(0) = (SV *)(cx->blk_sub.argarray = arg);
+                   if (arg) {
+                       SvREFCNT_dec(PAD_SVl(0));
+                       PAD_SVl(0) = (SV *)(cx->blk_sub.argarray = arg);
+                   }
 
                    /* GvAV(PL_defgv) might have been modified on scope
                       exit, so restore it. */
@@ -3017,7 +3043,7 @@ PP(pp_goto) /* also pp_dump */
                    gotoprobe = CvROOT(cx->blk_sub.cv);
                    break;
                }
-               /* FALL THROUGH */
+               /* FALLTHROUGH */
            case CXt_FORMAT:
            case CXt_NULL:
                DIE(aTHX_ "Can't \"goto\" out of a pseudo block");
@@ -3072,7 +3098,7 @@ PP(pp_goto) /* also pp_dump */
            I32 oldsave;
 
            if (ix < 0)
-               ix = 0;
+               DIE(aTHX_ "panic: docatch: illegal ix=%ld", (long)ix);
            dounwind(ix);
            TOPBLOCK(cx);
            oldsave = PL_scopestack[PL_scopestack_ix];
@@ -3217,7 +3243,7 @@ S_docatch(pTHX_ OP *o)
            PL_restartop = 0;
            goto redo_body;
        }
-       /* FALL THROUGH */
+       /* FALLTHROUGH */
     default:
        JMPENV_POP;
        PL_op = oldop;
@@ -3236,8 +3262,8 @@ S_docatch(pTHX_ OP *o)
 Locate the CV corresponding to the currently executing sub or eval.
 If db_seqp is non_null, skip CVs that are in the DB package and populate
 *db_seqp with the cop sequence number at the point that the DB:: code was
-entered. (allows debuggers to eval in the scope of the breakpoint rather
-than in the scope of the debugger itself).
+entered.  (This allows debuggers to eval in the scope of the breakpoint
+rather than in the scope of the debugger itself.)
 
 =cut
 */
@@ -3592,7 +3618,7 @@ S_check_type_and_open(pTHX_ SV *name)
        return NULL;
     }
 
-#if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
+#if !defined(PERLIO_IS_STDIO)
     return PerlIO_openn(aTHX_ ":", PERL_SCRIPT_MODE, -1, 0, 0, NULL, 1, &name);
 #else
     return PerlIO_open(p, PERL_SCRIPT_MODE);
@@ -3668,9 +3694,7 @@ PP(pp_require)
     STRLEN unixlen;
 #ifdef VMS
     int vms_unixname = 0;
-    char *unixnamebuf;
     char *unixdir;
-    char *unixdirbuf;
 #endif
     const char *tryname = NULL;
     SV *namesv = NULL;
@@ -3711,7 +3735,7 @@ PP(pp_require)
                first  = SvIV(*av_fetch(lav,0,0));
                if (   first > (int)PERL_REVISION    /* probably 'use 6.0' */
                    || hv_exists(MUTABLE_HV(req), "qv", 2 ) /* qv style */
-                   || av_len(lav) > 1               /* FP with > 3 digits */
+                   || av_tindex(lav) > 1            /* FP with > 3 digits */
                    || strstr(SvPVX(pv),".0")        /* FP with leading 0 */
                   ) {
                    DIE(aTHX_ "Perl %"SVf" required--this is only "
@@ -3724,7 +3748,7 @@ PP(pp_require)
                    SV *hintsv;
                    I32 second = 0;
 
-                   if (av_len(lav)>=1) 
+                   if (av_tindex(lav)>=1)
                        second = SvIV(*av_fetch(lav,1,0));
 
                    second /= second >= 600  ? 100 : 10;
@@ -3765,8 +3789,9 @@ PP(pp_require)
      * name can be translated to UNIX.
      */
     
-    if ((unixnamebuf = SvPVX(sv_2mortal(newSVpv("", VMS_MAXRSS-1))))
-        && (unixname = tounixspec(name, unixnamebuf)) != NULL) {
+    if ((unixname =
+         tounixspec(name, SvPVX(sv_2mortal(newSVpv("", VMS_MAXRSS-1)))))
+        != NULL) {
        unixlen = strlen(unixname);
        vms_unixname = 1;
     }
@@ -3807,21 +3832,22 @@ PP(pp_require)
        if (vms_unixname)
 #endif
        {
+           SV *nsv = sv;
            namesv = newSV_type(SVt_PV);
            for (i = 0; i <= AvFILL(ar); i++) {
                SV * const dirsv = *av_fetch(ar, i, TRUE);
 
-               if (SvTIED_mg((const SV *)ar, PERL_MAGIC_tied))
-                   mg_get(dirsv);
+               SvGETMAGIC(dirsv);
                if (SvROK(dirsv)) {
                    int count;
                    SV **svp;
                    SV *loader = dirsv;
 
                    if (SvTYPE(SvRV(loader)) == SVt_PVAV
-                       && !sv_isobject(loader))
+                       && !SvOBJECT(SvRV(loader)))
                    {
                        loader = *av_fetch(MUTABLE_AV(SvRV(loader)), 0, TRUE);
+                       SvGETMAGIC(loader);
                    }
 
                    Perl_sv_setpvf(aTHX_ namesv, "/loader/0x%"UVxf"/%s",
@@ -3829,14 +3855,24 @@ PP(pp_require)
                    tryname = SvPVX_const(namesv);
                    tryrsfp = NULL;
 
+                   if (SvPADTMP(nsv)) {
+                       nsv = sv_newmortal();
+                       SvSetSV_nosteal(nsv,sv);
+                   }
+
                    ENTER_with_name("call_INC");
                    SAVETMPS;
                    EXTEND(SP, 2);
 
                    PUSHMARK(SP);
                    PUSHs(dirsv);
-                   PUSHs(sv);
+                   PUSHs(nsv);
                    PUTBACK;
+                   if (SvGMAGICAL(loader)) {
+                       SV *l = sv_newmortal();
+                       sv_setsv_nomg(l, loader);
+                       loader = l;
+                   }
                    if (sv_isobject(loader))
                        count = call_method("INC", G_ARRAY);
                    else
@@ -3937,7 +3973,7 @@ PP(pp_require)
                    STRLEN dirlen;
 
                    if (SvOK(dirsv)) {
-                       dir = SvPV_const(dirsv, dirlen);
+                       dir = SvPV_nomg_const(dirsv, dirlen);
                    } else {
                        dir = "";
                        dirlen = 0;
@@ -3946,8 +3982,9 @@ PP(pp_require)
                    if (!IS_SAFE_SYSCALL(dir, dirlen, "@INC entry", "require"))
                        continue;
 #ifdef VMS
-                   if (((unixdirbuf = SvPVX(sv_2mortal(newSVpv("", VMS_MAXRSS-1)))) == NULL)
-                       || ((unixdir = tounixpath(dir, unixdirbuf)) == NULL))
+                   if ((unixdir =
+                         tounixpath(dir, SvPVX(sv_2mortal(newSVpv("", VMS_MAXRSS-1)))))
+                        == NULL)
                        continue;
                    sv_setpv(namesv, unixdir);
                    sv_catpv(namesv, unixname);
@@ -3979,6 +4016,9 @@ PP(pp_require)
                        /* Avoid '<dir>//<file>' */
                        if (!dirlen || *(tmp-1) != '/') {
                            *tmp++ = '/';
+                       } else {
+                           /* So SvCUR_set reports the correct length below */
+                           dirlen--;
                        }
 
                        /* name came from an SV, so it will have a '\0' at the
@@ -4595,7 +4635,7 @@ S_do_smartmatch(pTHX_ HV *seen_this, HV *seen_other, const bool copied)
            SSize_t i;
            bool andedresults = TRUE;
            AV *av = (AV*) SvRV(d);
-           const I32 len = av_len(av);
+           const I32 len = av_tindex(av);
            DEBUG_M(Perl_deb(aTHX_ "    applying rule Array-CodeRef\n"));
            if (len == -1)
                RETPUSHYES;
@@ -4654,28 +4694,28 @@ S_do_smartmatch(pTHX_ HV *seen_this, HV *seen_other, const bool copied)
            /* Check that the key-sets are identical */
            HE *he;
            HV *other_hv = MUTABLE_HV(SvRV(d));
-           bool tied = FALSE;
-           bool other_tied = FALSE;
+           bool tied;
+           bool other_tied;
            U32 this_key_count  = 0,
                other_key_count = 0;
            HV *hv = MUTABLE_HV(SvRV(e));
 
            DEBUG_M(Perl_deb(aTHX_ "    applying rule Hash-Hash\n"));
            /* Tied hashes don't know how many keys they have. */
-           if (SvTIED_mg((SV*)hv, PERL_MAGIC_tied)) {
-               tied = TRUE;
-           }
-           else if (SvTIED_mg((const SV *)other_hv, PERL_MAGIC_tied)) {
-               HV * const temp = other_hv;
-               other_hv = hv;
-               hv = temp;
-               tied = TRUE;
+           tied = cBOOL(SvTIED_mg((SV*)hv, PERL_MAGIC_tied));
+           other_tied = cBOOL(SvTIED_mg((const SV *)other_hv, PERL_MAGIC_tied));
+           if (!tied ) {
+               if(other_tied) {
+                   /* swap HV sides */
+                   HV * const temp = other_hv;
+                   other_hv = hv;
+                   hv = temp;
+                   tied = TRUE;
+                   other_tied = FALSE;
+               }
+               else if(HvUSEDKEYS((const HV *) hv) != HvUSEDKEYS(other_hv))
+                   RETPUSHNO;
            }
-           if (SvTIED_mg((const SV *)other_hv, PERL_MAGIC_tied))
-               other_tied = TRUE;
-           
-           if (!tied && HvUSEDKEYS((const HV *) hv) != HvUSEDKEYS(other_hv))
-               RETPUSHNO;
 
            /* The hashes have the same number of keys, so it suffices
               to check that one is a subset of the other. */
@@ -4707,7 +4747,7 @@ S_do_smartmatch(pTHX_ HV *seen_this, HV *seen_other, const bool copied)
        }
        else if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVAV) {
            AV * const other_av = MUTABLE_AV(SvRV(d));
-           const SSize_t other_len = av_len(other_av) + 1;
+           const SSize_t other_len = av_tindex(other_av) + 1;
            SSize_t i;
            HV *hv = MUTABLE_HV(SvRV(e));
 
@@ -4759,7 +4799,7 @@ S_do_smartmatch(pTHX_ HV *seen_this, HV *seen_other, const bool copied)
        }
        else if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVHV) {
            AV * const other_av = MUTABLE_AV(SvRV(e));
-           const SSize_t other_len = av_len(other_av) + 1;
+           const SSize_t other_len = av_tindex(other_av) + 1;
            SSize_t i;
 
            DEBUG_M(Perl_deb(aTHX_ "    applying rule Hash-Array\n"));
@@ -4777,11 +4817,11 @@ S_do_smartmatch(pTHX_ HV *seen_this, HV *seen_other, const bool copied)
        if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVAV) {
            AV *other_av = MUTABLE_AV(SvRV(d));
            DEBUG_M(Perl_deb(aTHX_ "    applying rule Array-Array\n"));
-           if (av_len(MUTABLE_AV(SvRV(e))) != av_len(other_av))
+           if (av_tindex(MUTABLE_AV(SvRV(e))) != av_tindex(other_av))
                RETPUSHNO;
            else {
                SSize_t i;
-               const SSize_t other_len = av_len(other_av);
+                const SSize_t other_len = av_tindex(other_av);
 
                if (NULL == seen_this) {
                    seen_this = newHV();
@@ -4836,7 +4876,7 @@ S_do_smartmatch(pTHX_ HV *seen_this, HV *seen_other, const bool copied)
          sm_regex_array:
            {
                PMOP * const matcher = make_matcher((REGEXP*) SvRV(d));
-               const SSize_t this_len = av_len(MUTABLE_AV(SvRV(e)));
+               const SSize_t this_len = av_tindex(MUTABLE_AV(SvRV(e)));
                SSize_t i;
 
                for(i = 0; i <= this_len; ++i) {
@@ -4853,7 +4893,7 @@ S_do_smartmatch(pTHX_ HV *seen_this, HV *seen_other, const bool copied)
        }
        else if (!SvOK(d)) {
            /* undef ~~ array */
-           const SSize_t this_len = av_len(MUTABLE_AV(SvRV(e)));
+           const SSize_t this_len = av_tindex(MUTABLE_AV(SvRV(e)));
            SSize_t i;
 
            DEBUG_M(Perl_deb(aTHX_ "    applying rule Undef-Array\n"));
@@ -4869,7 +4909,7 @@ S_do_smartmatch(pTHX_ HV *seen_this, HV *seen_other, const bool copied)
          sm_any_array:
            {
                SSize_t i;
-               const SSize_t this_len = av_len(MUTABLE_AV(SvRV(e)));
+               const SSize_t this_len = av_tindex(MUTABLE_AV(SvRV(e)));
 
                DEBUG_M(Perl_deb(aTHX_ "    applying rule Any-Array\n"));
                for (i = 0; i <= this_len; ++i) {
@@ -5183,7 +5223,7 @@ S_doparseform(pTHX_ SV *sv)
                s++;
            }
            noblank = TRUE;
-           /* FALL THROUGH */
+           /* FALLTHROUGH */
        case ' ': case '\t':
            skipspaces++;
            continue;