This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
arrange for next() to resume at the unstack op rather than the
[perl5.git] / pp_ctl.c
index feec363..d2e795f 100644 (file)
--- a/pp_ctl.c
+++ b/pp_ctl.c
@@ -1,6 +1,6 @@
 /*    pp_ctl.c
  *
- *    Copyright (c) 1991-1999, Larry Wall
+ *    Copyright (c) 1991-2000, Larry Wall
  *
  *    You may distribute under the terms of either the GNU General Public
  *    License or the Artistic License, as specified in the README file.
@@ -114,6 +114,8 @@ PP(pp_regcomp)
                PL_reginterp_cnt = I32_MAX; /* Mark as safe.  */
 
            pm->op_pmflags = pm->op_pmpermflags;        /* reset case sensitivity */
+           if (DO_UTF8(tmpstr))
+               pm->op_pmdynflags |= PMdf_UTF8;
            pm->op_pmregexp = CALLREGCOMP(aTHX_ t, t + len, pm);
            PL_reginterp_cnt = 0;               /* XXXX Be extra paranoid - needed
                                           inside tie/overload accessors.  */
@@ -134,9 +136,13 @@ PP(pp_regcomp)
     else if (strEQ("\\s+", pm->op_pmregexp->precomp))
        pm->op_pmflags |= PMf_WHITE;
 
+    /* XXX runtime compiled output needs to move to the pad */
     if (pm->op_pmflags & PMf_KEEP) {
        pm->op_private &= ~OPpRUNTIME;  /* no point compiling again */
+#if !defined(USE_ITHREADS) && !defined(USE_THREADS)
+       /* XXX can't change the optree at runtime either */
        cLOGOP->op_first->op_next = PL_op->op_next;
+#endif
     }
     RETURN;
 }
@@ -292,11 +298,17 @@ PP(pp_formline)
     NV value;
     bool gotsome;
     STRLEN len;
-    STRLEN fudge = SvCUR(tmpForm) * (IN_UTF8 ? 3 : 1) + 1;
+    STRLEN fudge = SvCUR(tmpForm) * (IN_BYTE ? 1 : 3) + 1;
+    bool item_is_utf = FALSE;
 
     if (!SvMAGICAL(tmpForm) || !SvCOMPILED(tmpForm)) {
-       SvREADONLY_off(tmpForm);
-       doparseform(tmpForm);
+       if (SvREADONLY(tmpForm)) {
+           SvREADONLY_off(tmpForm);
+           doparseform(tmpForm);
+           SvREADONLY_on(tmpForm);
+       }
+       else
+           doparseform(tmpForm);
     }
 
     SvPV_force(PL_formtarget, len);
@@ -370,7 +382,7 @@ PP(pp_formline)
        case FF_CHECKNL:
            item = s = SvPV(sv, len);
            itemsize = len;
-           if (IN_UTF8) {
+           if (DO_UTF8(sv)) {
                itemsize = sv_len_utf8(sv);
                if (itemsize != len) {
                    I32 itembytes;
@@ -389,11 +401,13 @@ PP(pp_formline)
                            break;
                        s++;
                    }
+                   item_is_utf = TRUE;
                    itemsize = s - item;
                    sv_pos_b2u(sv, &itemsize);
                    break;
                }
            }
+           item_is_utf = FALSE;
            if (itemsize > fieldsize)
                itemsize = fieldsize;
            send = chophere = s + itemsize;
@@ -410,7 +424,7 @@ PP(pp_formline)
        case FF_CHECKCHOP:
            item = s = SvPV(sv, len);
            itemsize = len;
-           if (IN_UTF8) {
+           if (DO_UTF8(sv)) {
                itemsize = sv_len_utf8(sv);
                if (itemsize != len) {
                    I32 itembytes;
@@ -448,9 +462,11 @@ PP(pp_formline)
                        itemsize = chophere - item;
                        sv_pos_b2u(sv, &itemsize);
                    }
+                   item_is_utf = TRUE;
                    break;
                }
            }
+           item_is_utf = FALSE;
            if (itemsize <= fieldsize) {
                send = chophere = s + itemsize;
                while (s < send) {
@@ -506,7 +522,7 @@ PP(pp_formline)
        case FF_ITEM:
            arg = itemsize;
            s = item;
-           if (IN_UTF8) {
+           if (item_is_utf) {
                while (arg--) {
                    if (*s & 0x80) {
                        switch (UTF8SKIP(s)) {
@@ -549,6 +565,7 @@ PP(pp_formline)
        case FF_LINEGLOB:
            item = s = SvPV(sv, len);
            itemsize = len;
+           item_is_utf = FALSE;                /* XXX is this correct? */
            if (itemsize) {
                gotsome = TRUE;
                send = s + itemsize;
@@ -842,7 +859,7 @@ PP(pp_sort)
     up = myorigmark + 1;
     while (MARK < SP) {        /* This may or may not shift down one here. */
        /*SUPPRESS 560*/
-       if (*up = *++MARK) {                    /* Weed out nulls. */
+       if ((*up = *++MARK)) {                  /* Weed out nulls. */
            SvTEMP_off(*up);
            if (!PL_sortcop && !SvPOK(*up)) {
                STRLEN n_a;
@@ -993,7 +1010,9 @@ PP(pp_flop)
            mg_get(right);
 
        if (SvNIOKp(left) || !SvPOKp(left) ||
-         (looks_like_number(left) && *SvPVX(left) != '0') )
+           SvNIOKp(right) || !SvPOKp(right) ||
+           (looks_like_number(left) && *SvPVX(left) != '0' &&
+            looks_like_number(right) && *SvPVX(right) != '0'))
        {
            if (SvNV(left) < IV_MIN || SvNV(right) > IV_MAX)
                DIE(aTHX_ "Range iterator outside integer range");
@@ -1056,28 +1075,28 @@ S_dopoptolabel(pTHX_ char *label)
        cx = &cxstack[i];
        switch (CxTYPE(cx)) {
        case CXt_SUBST:
-           if (ckWARN(WARN_UNSAFE))
-               Perl_warner(aTHX_ WARN_UNSAFE, "Exiting substitution via %s", 
+           if (ckWARN(WARN_EXITING))
+               Perl_warner(aTHX_ WARN_EXITING, "Exiting substitution via %s", 
                        PL_op_name[PL_op->op_type]);
            break;
        case CXt_SUB:
-           if (ckWARN(WARN_UNSAFE))
-               Perl_warner(aTHX_ WARN_UNSAFE, "Exiting subroutine via %s", 
+           if (ckWARN(WARN_EXITING))
+               Perl_warner(aTHX_ WARN_EXITING, "Exiting subroutine via %s", 
                        PL_op_name[PL_op->op_type]);
            break;
        case CXt_FORMAT:
-           if (ckWARN(WARN_UNSAFE))
-               Perl_warner(aTHX_ WARN_UNSAFE, "Exiting format via %s", 
+           if (ckWARN(WARN_EXITING))
+               Perl_warner(aTHX_ WARN_EXITING, "Exiting format via %s", 
                        PL_op_name[PL_op->op_type]);
            break;
        case CXt_EVAL:
-           if (ckWARN(WARN_UNSAFE))
-               Perl_warner(aTHX_ WARN_UNSAFE, "Exiting eval via %s", 
+           if (ckWARN(WARN_EXITING))
+               Perl_warner(aTHX_ WARN_EXITING, "Exiting eval via %s", 
                        PL_op_name[PL_op->op_type]);
            break;
        case CXt_NULL:
-           if (ckWARN(WARN_UNSAFE))
-               Perl_warner(aTHX_ WARN_UNSAFE, "Exiting pseudo-block via %s", 
+           if (ckWARN(WARN_EXITING))
+               Perl_warner(aTHX_ WARN_EXITING, "Exiting pseudo-block via %s", 
                        PL_op_name[PL_op->op_type]);
            return -1;
        case CXt_LOOP:
@@ -1182,28 +1201,28 @@ S_dopoptoloop(pTHX_ I32 startingblock)
        cx = &cxstack[i];
        switch (CxTYPE(cx)) {
        case CXt_SUBST:
-           if (ckWARN(WARN_UNSAFE))
-               Perl_warner(aTHX_ WARN_UNSAFE, "Exiting substitution via %s", 
+           if (ckWARN(WARN_EXITING))
+               Perl_warner(aTHX_ WARN_EXITING, "Exiting substitution via %s", 
                        PL_op_name[PL_op->op_type]);
            break;
        case CXt_SUB:
-           if (ckWARN(WARN_UNSAFE))
-               Perl_warner(aTHX_ WARN_UNSAFE, "Exiting subroutine via %s", 
+           if (ckWARN(WARN_EXITING))
+               Perl_warner(aTHX_ WARN_EXITING, "Exiting subroutine via %s", 
                        PL_op_name[PL_op->op_type]);
            break;
        case CXt_FORMAT:
-           if (ckWARN(WARN_UNSAFE))
-               Perl_warner(aTHX_ WARN_UNSAFE, "Exiting format via %s", 
+           if (ckWARN(WARN_EXITING))
+               Perl_warner(aTHX_ WARN_EXITING, "Exiting format via %s", 
                        PL_op_name[PL_op->op_type]);
            break;
        case CXt_EVAL:
-           if (ckWARN(WARN_UNSAFE))
-               Perl_warner(aTHX_ WARN_UNSAFE, "Exiting eval via %s", 
+           if (ckWARN(WARN_EXITING))
+               Perl_warner(aTHX_ WARN_EXITING, "Exiting eval via %s", 
                        PL_op_name[PL_op->op_type]);
            break;
        case CXt_NULL:
-           if (ckWARN(WARN_UNSAFE))
-               Perl_warner(aTHX_ WARN_UNSAFE, "Exiting pseudo-block via %s", 
+           if (ckWARN(WARN_EXITING))
+               Perl_warner(aTHX_ WARN_EXITING, "Exiting pseudo-block via %s", 
                        PL_op_name[PL_op->op_type]);
            return -1;
        case CXt_LOOP:
@@ -1219,7 +1238,6 @@ Perl_dounwind(pTHX_ I32 cxix)
 {
     dTHR;
     register PERL_CONTEXT *cx;
-    SV **newsp;
     I32 optype;
 
     while (cxstack_ix > cxix) {
@@ -1296,14 +1314,13 @@ Perl_qerror(pTHX_ SV *err)
     else if (PL_errors)
        sv_catsv(PL_errors, err);
     else
-       Perl_warn(aTHX_ "%_", err);
+       Perl_warn(aTHX_ "%"SVf, err);
     ++PL_error_count;
 }
 
 OP *
 Perl_die_where(pTHX_ char *message, STRLEN msglen)
 {
-    dSP;
     STRLEN n_a;
     if (PL_in_eval) {
        I32 cxix;
@@ -1328,9 +1345,9 @@ Perl_die_where(pTHX_ char *message, STRLEN msglen)
                    SvGROW(err, SvCUR(err)+sizeof(prefix)+msglen);
                    sv_catpvn(err, prefix, sizeof(prefix)-1);
                    sv_catpvn(err, message, msglen);
-                   if (ckWARN(WARN_UNSAFE)) {
+                   if (ckWARN(WARN_MISC)) {
                        STRLEN start = SvCUR(err)-msglen-sizeof(prefix)+1;
-                       Perl_warner(aTHX_ WARN_UNSAFE, SvPVX(err)+start);
+                       Perl_warner(aTHX_ WARN_MISC, SvPVX(err)+start);
                    }
                }
            }
@@ -1437,7 +1454,7 @@ PP(pp_caller)
 
     if (MAXARG)
        count = POPi;
-    EXTEND(SP, 7);
+    EXTEND(SP, 10);
     for (;;) {
        /* we may be in a higher stacklevel, so dig down deeper */
        while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
@@ -1504,15 +1521,21 @@ PP(pp_caller)
     else
        PUSHs(sv_2mortal(newSViv(gimme & G_ARRAY)));
     if (CxTYPE(cx) == CXt_EVAL) {
+       /* eval STRING */
        if (cx->blk_eval.old_op_type == OP_ENTEREVAL) {
            PUSHs(cx->blk_eval.cur_text);
            PUSHs(&PL_sv_no);
-       } 
-       else if (cx->blk_eval.old_name) { /* Try blocks have old_name == 0. */
-           /* Require, put the name. */
-           PUSHs(sv_2mortal(newSVpv(cx->blk_eval.old_name, 0)));
+       }
+       /* require */
+       else if (cx->blk_eval.old_namesv) {
+           PUSHs(sv_2mortal(newSVsv(cx->blk_eval.old_namesv)));
            PUSHs(&PL_sv_yes);
        }
+       /* eval BLOCK (try blocks have old_namesv == 0) */
+       else {
+           PUSHs(&PL_sv_undef);
+           PUSHs(&PL_sv_undef);
+       }
     }
     else {
        PUSHs(&PL_sv_undef);
@@ -1542,6 +1565,17 @@ PP(pp_caller)
      * use the global PL_hints) */
     PUSHs(sv_2mortal(newSViv((I32)cx->blk_oldcop->op_private &
                             HINT_PRIVATE_MASK)));
+    {
+       SV * mask ;
+       SV * old_warnings = cx->blk_oldcop->cop_warnings ;
+       if  (old_warnings == pWARN_NONE || old_warnings == pWARN_STD)
+            mask = newSVpvn(WARN_NONEstring, WARNsize) ;
+        else if (old_warnings == pWARN_ALL)
+            mask = newSVpvn(WARN_ALLstring, WARNsize) ;
+        else
+            mask = newSVsv(old_warnings);
+        PUSHs(sv_2mortal(mask));
+    }
     RETURN;
 }
 
@@ -1670,7 +1704,11 @@ PP(pp_enteriter)
        if (SvTYPE(cx->blk_loop.iterary) != SVt_PVAV) {
            dPOPss;
            if (SvNIOKp(sv) || !SvPOKp(sv) ||
-               (looks_like_number(sv) && *SvPVX(sv) != '0')) {
+               SvNIOKp(cx->blk_loop.iterary) || !SvPOKp(cx->blk_loop.iterary) ||
+               (looks_like_number(sv) && *SvPVX(sv) != '0' &&
+                looks_like_number((SV*)cx->blk_loop.iterary) &&
+                *SvPVX(cx->blk_loop.iterary) != '0'))
+           {
                 if (SvNV(sv) < IV_MIN ||
                     SvNV((SV*)cx->blk_loop.iterary) >= IV_MAX)
                     DIE(aTHX_ "Range iterator outside integer range");
@@ -1752,6 +1790,7 @@ PP(pp_return)
     I32 cxix;
     register PERL_CONTEXT *cx;
     bool popsub2 = FALSE;
+    bool clear_errsv = FALSE;
     I32 gimme;
     SV **newsp;
     PMOP *newpm;
@@ -1782,7 +1821,11 @@ PP(pp_return)
        popsub2 = TRUE;
        break;
     case CXt_EVAL:
+       if (!(PL_in_eval & EVAL_KEEPERR))
+           clear_errsv = TRUE;
        POPEVAL(cx);
+       if (CxTRYBLOCK(cx))
+           break;
        if (AvFILLp(PL_comppad_name) >= 0)
            free_closures();
        lex_end();
@@ -1790,9 +1833,9 @@ PP(pp_return)
            (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
        {
            /* Unassume the success we assumed earlier. */
-           char *name = cx->blk_eval.old_name;
-           (void)hv_delete(GvHVn(PL_incgv), name, strlen(name), G_DISCARD);
-           DIE(aTHX_ "%s did not return a true value", name);
+           SV *nsv = cx->blk_eval.old_namesv;
+           (void)hv_delete(GvHVn(PL_incgv), SvPVX(nsv), SvCUR(nsv), G_DISCARD);
+           DIE(aTHX_ "%s did not return a true value", SvPVX(nsv));
        }
        break;
     case CXt_FORMAT:
@@ -1811,15 +1854,21 @@ PP(pp_return)
                        *++newsp = SvREFCNT_inc(*SP);
                        FREETMPS;
                        sv_2mortal(*newsp);
-                   } else {
+                   }
+                   else {
+                       sv = SvREFCNT_inc(*SP); /* FREETMPS could clobber it */
                        FREETMPS;
-                       *++newsp = sv_mortalcopy(*SP);
+                       *++newsp = sv_mortalcopy(sv);
+                       SvREFCNT_dec(sv);
                    }
-               } else
+               }
+               else
                    *++newsp = (SvTEMP(*SP)) ? *SP : sv_mortalcopy(*SP);
-           } else
+           }
+           else
                *++newsp = sv_mortalcopy(*SP);
-       } else
+       }
+       else
            *++newsp = &PL_sv_undef;
     }
     else if (gimme == G_ARRAY) {
@@ -1841,6 +1890,8 @@ PP(pp_return)
 
     LEAVE;
     LEAVESUB(sv);
+    if (clear_errsv)
+       sv_setpv(ERRSV,"");
     return pop_return();
 }
 
@@ -1934,7 +1985,7 @@ PP(pp_next)
 {
     I32 cxix;
     register PERL_CONTEXT *cx;
-    I32 oldsave;
+    I32 inner;
 
     if (PL_op->op_flags & OPf_SPECIAL) {
        cxix = dopoptoloop(cxstack_ix);
@@ -1949,9 +2000,12 @@ PP(pp_next)
     if (cxix < cxstack_ix)
        dounwind(cxix);
 
+    /* clear off anything above the scope we're re-entering, but
+     * save the rest until after a possible continue block */
+    inner = PL_scopestack_ix;
     TOPBLOCK(cx);
-    oldsave = PL_scopestack[PL_scopestack_ix - 1];
-    LEAVE_SCOPE(oldsave);
+    if (PL_scopestack_ix < inner)
+       leave_scope(PL_scopestack[PL_scopestack_ix]);
     return cx->blk_loop.next_op;
 }
 
@@ -2015,7 +2069,7 @@ S_dofindlabel(pTHX_ OP *o, char *label, OP **opstack, OP **oplimit)
                 (ops[-1]->op_type != OP_NEXTSTATE &&
                  ops[-1]->op_type != OP_DBSTATE)))
                *ops++ = kid;
-           if (o = dofindlabel(kid, label, ops, oplimit))
+           if ((o = dofindlabel(kid, label, ops, oplimit)))
                return o;
        }
     }
@@ -2109,7 +2163,6 @@ PP(pp_goto)
            }
            else if (CvXSUB(cv)) {      /* put GvAV(defgv) back onto stack */
                AV* av;
-               int i;
 #ifdef USE_THREADS
                av = (AV*)PL_curpad[0];
 #else
@@ -2350,10 +2403,12 @@ PP(pp_goto)
                gotoprobe = PL_main_root;
                break;
            }
-           retop = dofindlabel(gotoprobe, label,
-                               enterops, enterops + GOTO_DEPTH);
-           if (retop)
-               break;
+           if (gotoprobe) {
+               retop = dofindlabel(gotoprobe, label,
+                                   enterops, enterops + GOTO_DEPTH);
+               if (retop)
+                   break;
+           }
            PL_lastgotoprobe = gotoprobe;
        }
        if (!retop)
@@ -2381,8 +2436,7 @@ PP(pp_goto)
                /* Eventually we may want to stack the needed arguments
                 * for each op.  For now, we punt on the hard ones. */
                if (PL_op->op_type == OP_ENTERITER)
-                   DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop",
-                       label);
+                   DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
                CALL_FPTR(PL_op->op_ppaddr)(aTHX);
            }
            PL_op = oldop;
@@ -2414,8 +2468,8 @@ PP(pp_exit)
        anum = 0;
     else {
        anum = SvIVx(POPs);
-#ifdef VMSISH_EXIT
-       if (anum == 1 && VMSISH_EXIT)
+#ifdef VMS
+        if (anum == 1 && (PL_op->op_private & OPpEXIT_VMSISH))
            anum = 0;
 #endif
     }
@@ -2492,9 +2546,17 @@ S_save_lines(pTHX_ AV *array, SV *sv)
     }
 }
 
+#ifdef PERL_FLEXIBLE_EXCEPTIONS
 STATIC void *
 S_docatch_body(pTHX_ va_list args)
 {
+    return docatch_body();
+}
+#endif
+
+STATIC void *
+S_docatch_body(pTHX)
+{
     CALLRUNOPS(aTHX);
     return NULL;
 }
@@ -2512,10 +2574,18 @@ S_docatch(pTHX_ OP *o)
     assert(CATCH_GET == TRUE);
 #endif
     PL_op = o;
+#ifdef PERL_FLEXIBLE_EXCEPTIONS
  redo_body:
     CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_docatch_body));
+#else
+    JMPENV_PUSH(ret);
+#endif
     switch (ret) {
     case 0:
+#ifndef PERL_FLEXIBLE_EXCEPTIONS
+ redo_body:
+       docatch_body();
+#endif
        break;
     case 3:
        if (PL_restartop && cursi == PL_curstackinfo) {
@@ -2525,10 +2595,12 @@ S_docatch(pTHX_ OP *o)
        }
        /* FALL THROUGH */
     default:
+       JMPENV_POP;
        PL_op = oldop;
        JMPENV_JUMP(ret);
        /* NOTREACHED */
     }
+    JMPENV_POP;
     PL_op = oldop;
     return Nullop;
 }
@@ -2545,8 +2617,9 @@ Perl_sv_compile_2op(pTHX_ SV *sv, OP** startop, char *code, AV** avp)
     I32 gimme = 0;   /* SUSPECT - INITIALZE TO WHAT?  NI-S */
     I32 optype;
     OP dummy;
-    OP *oop = PL_op, *rop;
-    char tmpbuf[TYPE_DIGITS(long) + 12 + 10];
+    OP *rop;
+    char tbuf[TYPE_DIGITS(long) + 12 + 10];
+    char *tmpbuf = tbuf;
     char *safestr;
 
     ENTER;
@@ -2560,7 +2633,15 @@ Perl_sv_compile_2op(pTHX_ SV *sv, OP** startop, char *code, AV** avp)
     }
     SAVECOPFILE(&PL_compiling);
     SAVECOPLINE(&PL_compiling);
-    sprintf(tmpbuf, "_<(%.10s_eval %lu)", code, (unsigned long)++PL_evalseq);
+    if (PERLDB_NAMEEVAL && CopLINE(PL_curcop)) {
+       SV *sv = sv_newmortal();
+       Perl_sv_setpvf(aTHX_ sv, "_<(%.10seval %lu)[%s:%"IVdf"]",
+                      code, (unsigned long)++PL_evalseq,
+                      CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
+       tmpbuf = SvPVX(sv);
+    }
+    else
+       sprintf(tmpbuf, "_<(%.10s_eval %lu)", code, (unsigned long)++PL_evalseq);
     CopFILE_set(&PL_compiling, tmpbuf+2);
     CopLINE_set(&PL_compiling, 1);
     /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
@@ -2664,8 +2745,11 @@ S_doeval(pTHX_ int gimme, OP** startop)
     av_store(comppadlist, 1, (SV*)PL_comppad);
     CvPADLIST(PL_compcv) = comppadlist;
 
-    if (!saveop || saveop->op_type != OP_REQUIRE)
+    if (!saveop ||
+       (saveop->op_type != OP_REQUIRE && saveop->op_type != OP_DOFILE))
+    {
        CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc(caller);
+    }
 
     SAVEFREESV(PL_compcv);
 
@@ -2830,11 +2914,63 @@ PP(pp_require)
     SV *filter_sub = 0;
 
     sv = POPs;
-    if (SvNIOKp(sv) && !SvPOKp(sv)) {
-       if (Atof(PL_patchlevel) + 0.00000999 < SvNV(sv))
-           DIE(aTHX_ "Perl %s required--this is only version %s, stopped",
-               SvPV(sv,n_a),PL_patchlevel);
-       RETPUSHYES;
+    if (SvNIOKp(sv)) {
+       if (SvPOK(sv) && SvNOK(sv)) {           /* require v5.6.1 */
+           UV rev = 0, ver = 0, sver = 0;
+           I32 len;
+           U8 *s = (U8*)SvPVX(sv);
+           U8 *end = (U8*)SvPVX(sv) + SvCUR(sv);
+           if (s < end) {
+               rev = utf8_to_uv(s, &len);
+               s += len;
+               if (s < end) {
+                   ver = utf8_to_uv(s, &len);
+                   s += len;
+                   if (s < end)
+                       sver = utf8_to_uv(s, &len);
+               }
+           }
+           if (PERL_REVISION < rev
+               || (PERL_REVISION == rev
+                   && (PERL_VERSION < ver
+                       || (PERL_VERSION == ver
+                           && PERL_SUBVERSION < sver))))
+           {
+               DIE(aTHX_ "Perl v%"UVuf".%"UVuf".%"UVuf" required--this is only "
+                   "v%d.%d.%d, stopped", rev, ver, sver, PERL_REVISION,
+                   PERL_VERSION, PERL_SUBVERSION);
+           }
+           RETPUSHYES;
+       }
+       else if (!SvPOKp(sv)) {                 /* require 5.005_03 */
+           if ((NV)PERL_REVISION + ((NV)PERL_VERSION/(NV)1000)
+               + ((NV)PERL_SUBVERSION/(NV)1000000)
+               + 0.00000099 < SvNV(sv))
+           {
+               NV nrev = SvNV(sv);
+               UV rev = (UV)nrev;
+               NV nver = (nrev - rev) * 1000;
+               UV ver = (UV)(nver + 0.0009);
+               NV nsver = (nver - ver) * 1000;
+               UV sver = (UV)(nsver + 0.0009);
+
+               /* help out with the "use 5.6" confusion */
+               if (sver == 0 && (rev > 5 || (rev == 5 && ver >= 100))) {
+                   DIE(aTHX_ "Perl v%"UVuf".%"UVuf".%"UVuf" required--"
+                       "this is only v%d.%d.%d, stopped"
+                       " (did you mean v%"UVuf".%"UVuf".0?)",
+                       rev, ver, sver, PERL_REVISION, PERL_VERSION,
+                       PERL_SUBVERSION, rev, ver/100);
+               }
+               else {
+                   DIE(aTHX_ "Perl v%"UVuf".%"UVuf".%"UVuf" required--"
+                       "this is only v%d.%d.%d, stopped",
+                       rev, ver, sver, PERL_REVISION, PERL_VERSION,
+                       PERL_SUBVERSION);
+               }
+           }
+           RETPUSHYES;
+       }
     }
     name = SvPV(sv, len);
     if (!(name && len > 0 && *name))
@@ -3042,11 +3178,11 @@ PP(pp_require)
     PL_hints = 0;
     SAVESPTR(PL_compiling.cop_warnings);
     if (PL_dowarn & G_WARN_ALL_ON)
-        PL_compiling.cop_warnings = WARN_ALL ;
+        PL_compiling.cop_warnings = pWARN_ALL ;
     else if (PL_dowarn & G_WARN_ALL_OFF)
-        PL_compiling.cop_warnings = WARN_NONE ;
+        PL_compiling.cop_warnings = pWARN_NONE ;
     else 
-        PL_compiling.cop_warnings = WARN_STD ;
+        PL_compiling.cop_warnings = pWARN_STD ;
 
     if (filter_sub || filter_child_proc) {
        SV *datasv = filter_add(run_user_filter, Nullsv);
@@ -3087,7 +3223,8 @@ PP(pp_entereval)
     register PERL_CONTEXT *cx;
     dPOPss;
     I32 gimme = GIMME_V, was = PL_sub_generation;
-    char tmpbuf[TYPE_DIGITS(long) + 12];
+    char tbuf[TYPE_DIGITS(long) + 12];
+    char *tmpbuf = tbuf;
     char *safestr;
     STRLEN len;
     OP *ret;
@@ -3103,7 +3240,15 @@ PP(pp_entereval)
     /* switch to eval mode */
 
     SAVECOPFILE(&PL_compiling);
-    sprintf(tmpbuf, "_<(eval %lu)", (unsigned long)++PL_evalseq);
+    if (PERLDB_NAMEEVAL && CopLINE(PL_curcop)) {
+       SV *sv = sv_newmortal();
+       Perl_sv_setpvf(aTHX_ sv, "_<(eval %lu)[%s:%"IVdf"]",
+                      (unsigned long)++PL_evalseq,
+                      CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
+       tmpbuf = SvPVX(sv);
+    }
+    else
+       sprintf(tmpbuf, "_<(eval %lu)", (unsigned long)++PL_evalseq);
     CopFILE_set(&PL_compiling, tmpbuf+2);
     CopLINE_set(&PL_compiling, 1);
     /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
@@ -3203,9 +3348,9 @@ PP(pp_leaveeval)
        !(gimme == G_SCALAR ? SvTRUE(*SP) : SP > newsp))
     {
        /* Unassume the success we assumed earlier. */
-       char *name = cx->blk_eval.old_name;
-       (void)hv_delete(GvHVn(PL_incgv), name, strlen(name), G_DISCARD);
-       retop = Perl_die(aTHX_ "%s did not return a true value", name);
+       SV *nsv = cx->blk_eval.old_namesv;
+       (void)hv_delete(GvHVn(PL_incgv), SvPVX(nsv), SvCUR(nsv), G_DISCARD);
+       retop = Perl_die(aTHX_ "%s did not return a true value", SvPVX(nsv));
        /* die_where() did LEAVE, or we won't be here */
     }
     else {
@@ -3227,7 +3372,7 @@ PP(pp_entertry)
     SAVETMPS;
 
     push_return(cLOGOP->op_other->op_next);
-    PUSHBLOCK(cx, CXt_EVAL, SP);
+    PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), SP);
     PUSHEVAL(cx, 0, 0);
     PL_eval_root = PL_op;              /* Only needed so that goto works right. */
 
@@ -3878,7 +4023,7 @@ S_qsortsv(pTHX_ SV ** array, size_t num_elts, SVCOMPARE_t compare)
                on the correct side of the partition. If I find a greater
                value, then stop the scan.
             */
-            while (still_work_on_left = (u_right >= part_left)) {
+            while ((still_work_on_left = (u_right >= part_left))) {
                s = qsort_cmp(u_right, pc_left);
                if (s < 0) {
                   --u_right;
@@ -3899,7 +4044,7 @@ S_qsortsv(pTHX_ SV ** array, size_t num_elts, SVCOMPARE_t compare)
 
             /* Do a mirror image scan of uncompared values on the right
             */
-            while (still_work_on_right = (u_left <= part_right)) {
+            while ((still_work_on_right = (u_left <= part_right))) {
                s = qsort_cmp(pc_right, u_left);
                if (s < 0) {
                   ++u_left;