/* pp_ctl.c
*
- * Copyright (c) 1991-2000, Larry Wall
+ * Copyright (c) 1991-2001, 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.
#define DOCATCH(o) ((CATCH_GET == TRUE) ? docatch(o) : (o))
-static I32 sortcv(pTHXo_ SV *a, SV *b);
-static I32 sortcv_stacked(pTHXo_ SV *a, SV *b);
-static I32 sortcv_xsub(pTHXo_ SV *a, SV *b);
-static I32 sv_ncmp(pTHXo_ SV *a, SV *b);
-static I32 sv_i_ncmp(pTHXo_ SV *a, SV *b);
-static I32 amagic_ncmp(pTHXo_ SV *a, SV *b);
-static I32 amagic_i_ncmp(pTHXo_ SV *a, SV *b);
-static I32 amagic_cmp(pTHXo_ SV *a, SV *b);
-static I32 amagic_cmp_locale(pTHXo_ SV *a, SV *b);
-static I32 run_user_filter(pTHXo_ int idx, SV *buf_sv, int maxlen);
-
-#ifdef PERL_OBJECT
-static I32 sv_cmp_static(pTHXo_ SV *a, SV *b);
-static I32 sv_cmp_locale_static(pTHXo_ SV *a, SV *b);
-#else
+static I32 sortcv(pTHX_ SV *a, SV *b);
+static I32 sortcv_stacked(pTHX_ SV *a, SV *b);
+static I32 sortcv_xsub(pTHX_ SV *a, SV *b);
+static I32 sv_ncmp(pTHX_ SV *a, SV *b);
+static I32 sv_i_ncmp(pTHX_ SV *a, SV *b);
+static I32 amagic_ncmp(pTHX_ SV *a, SV *b);
+static I32 amagic_i_ncmp(pTHX_ SV *a, SV *b);
+static I32 amagic_cmp(pTHX_ SV *a, SV *b);
+static I32 amagic_cmp_locale(pTHX_ SV *a, SV *b);
+static I32 run_user_filter(pTHX_ int idx, SV *buf_sv, int maxlen);
+
#define sv_cmp_static Perl_sv_cmp
#define sv_cmp_locale_static Perl_sv_cmp_locale
-#endif
PP(pp_wantarray)
{
- djSP;
+ dSP;
I32 cxix;
EXTEND(SP, 1);
PP(pp_regcomp)
{
- djSP;
+ dSP;
register PMOP *pm = (PMOP*)cLOGOP->op_other;
register char *t;
SV *tmpstr;
STRLEN len;
MAGIC *mg = Null(MAGIC*);
-
+
tmpstr = POPs;
+
+ /* prevent recompiling under /o and ithreads. */
+#if defined(USE_ITHREADS) || defined(USE_5005THREADS)
+ if (pm->op_pmflags & PMf_KEEP && PM_GETRE(pm))
+ RETURN;
+#endif
+
if (SvROK(tmpstr)) {
SV *sv = SvRV(tmpstr);
if(SvMAGICAL(sv))
- mg = mg_find(sv, 'r');
+ mg = mg_find(sv, PERL_MAGIC_qr);
}
if (mg) {
regexp *re = (regexp *)mg->mg_obj;
- ReREFCNT_dec(pm->op_pmregexp);
- pm->op_pmregexp = ReREFCNT_inc(re);
+ ReREFCNT_dec(PM_GETRE(pm));
+ PM_SETRE(pm, ReREFCNT_inc(re));
}
else {
t = SvPV(tmpstr, len);
/* Check against the last compiled regexp. */
- if (!pm->op_pmregexp || !pm->op_pmregexp->precomp ||
- pm->op_pmregexp->prelen != len ||
- memNE(pm->op_pmregexp->precomp, t, len))
+ if (!PM_GETRE(pm) || !PM_GETRE(pm)->precomp ||
+ PM_GETRE(pm)->prelen != len ||
+ memNE(PM_GETRE(pm)->precomp, t, len))
{
- if (pm->op_pmregexp) {
- ReREFCNT_dec(pm->op_pmregexp);
- pm->op_pmregexp = Null(REGEXP*); /* crucial if regcomp aborts */
+ if (PM_GETRE(pm)) {
+ ReREFCNT_dec(PM_GETRE(pm));
+ PM_SETRE(pm, Null(REGEXP*)); /* crucial if regcomp aborts */
}
if (PL_op->op_flags & OPf_SPECIAL)
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
+ pm->op_pmdynflags |= PMdf_DYN_UTF8;
+ else {
+ pm->op_pmdynflags &= ~PMdf_DYN_UTF8;
+ if (pm->op_pmdynflags & PMdf_UTF8)
+ t = (char*)bytes_to_utf8((U8*)t, &len);
+ }
+ PM_SETRE(pm, CALLREGCOMP(aTHX_ t, t + len, pm));
+ if (!DO_UTF8(tmpstr) && (pm->op_pmdynflags & PMdf_UTF8))
+ Safefree(t);
+ PL_reginterp_cnt = 0; /* XXXX Be extra paranoid - needed
inside tie/overload accessors. */
}
}
}
#endif
- if (!pm->op_pmregexp->prelen && PL_curpm)
+ if (!PM_GETRE(pm)->prelen && PL_curpm)
pm = PL_curpm;
- else if (strEQ("\\s+", pm->op_pmregexp->precomp))
+ else if (strEQ("\\s+", PM_GETRE(pm)->precomp))
pm->op_pmflags |= PMf_WHITE;
+ else
+ 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)
+#if !defined(USE_ITHREADS) && !defined(USE_5005THREADS)
/* XXX can't change the optree at runtime either */
cLOGOP->op_first->op_next = PL_op->op_next;
#endif
PP(pp_substcont)
{
- djSP;
+ dSP;
register PMOP *pm = (PMOP*) cLOGOP->op_other;
register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
register SV *dstr = cx->sb_dstr;
: (REXEC_COPY_STR|REXEC_IGNOREPOS|REXEC_NOT_FIRST))))
{
SV *targ = cx->sb_targ;
- sv_catpvn(dstr, s, cx->sb_strend - s);
+ sv_catpvn(dstr, s, cx->sb_strend - s);
cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
(void)SvOOK_off(targ);
SvPVX(targ) = SvPVX(dstr);
SvCUR_set(targ, SvCUR(dstr));
SvLEN_set(targ, SvLEN(dstr));
+ if (DO_UTF8(dstr))
+ SvUTF8_on(targ);
SvPVX(dstr) = 0;
sv_free(dstr);
TAINT_IF(cx->sb_rxtainted & 1);
PUSHs(sv_2mortal(newSViv((I32)cx->sb_iters - 1)));
- (void)SvPOK_only(targ);
+ (void)SvPOK_only_UTF8(targ);
TAINT_IF(cx->sb_rxtainted);
SvSETMAGIC(targ);
SvTAINT(targ);
cx->sb_strend = s + (cx->sb_strend - m);
}
cx->sb_m = m = rx->startp[0] + orig;
- sv_catpvn(dstr, s, m-s);
+ if (m > s)
+ sv_catpvn(dstr, s, m-s);
cx->sb_s = rx->endp[0] + orig;
+ { /* Update the pos() information. */
+ SV *sv = cx->sb_targ;
+ MAGIC *mg;
+ I32 i;
+ if (SvTYPE(sv) < SVt_PVMG)
+ (void)SvUPGRADE(sv, SVt_PVMG);
+ if (!(mg = mg_find(sv, PERL_MAGIC_regex_global))) {
+ sv_magic(sv, Nullsv, PERL_MAGIC_regex_global, Nullch, 0);
+ mg = mg_find(sv, PERL_MAGIC_regex_global);
+ }
+ i = m - orig;
+ if (DO_UTF8(sv))
+ sv_pos_b2u(sv, &i);
+ mg->mg_len = i;
+ }
cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
rxres_save(&cx->sb_rxres, rx);
RETURNOP(pm->op_pmreplstart);
PP(pp_formline)
{
- djSP; dMARK; dORIGMARK;
+ dSP; dMARK; dORIGMARK;
register SV *tmpForm = *++MARK;
register U16 *fpc;
register char *t;
register char *s;
register char *send;
register I32 arg;
- register SV *sv;
- char *item;
- I32 itemsize;
- I32 fieldsize;
+ register SV *sv = Nullsv;
+ char *item = Nullch;
+ I32 itemsize = 0;
+ I32 fieldsize = 0;
I32 lines = 0;
bool chopspace = (strchr(PL_chopset, ' ') != Nullch);
- char *chophere;
- char *linemark;
+ char *chophere = Nullch;
+ char *linemark = Nullch;
NV value;
- bool gotsome;
+ bool gotsome = FALSE;
STRLEN len;
- STRLEN fudge = SvCUR(tmpForm) * (IN_BYTE ? 1 : 3) + 1;
+ STRLEN fudge = SvCUR(tmpForm) * (IN_BYTES ? 1 : 3) + 1;
bool item_is_utf = FALSE;
if (!SvMAGICAL(tmpForm) || !SvCOMPILED(tmpForm)) {
case FF_MORE: name = "MORE"; break;
case FF_LINEMARK: name = "LINEMARK"; break;
case FF_END: name = "END"; break;
+ case FF_0DECIMAL: name = "0DECIMAL"; break;
}
if (arg >= 0)
PerlIO_printf(Perl_debug_log, "%-16s%ld\n", name, (long) arg);
else
PerlIO_printf(Perl_debug_log, "%-16s\n", name);
- } )
+ } );
switch (*fpc++) {
case FF_LINEMARK:
linemark = t;
s = item;
if (item_is_utf) {
while (arg--) {
- if (*s & 0x80) {
- switch (UTF8SKIP(s)) {
+ if (UTF8_IS_CONTINUED(*s)) {
+ STRLEN skip = UTF8SKIP(s);
+ switch (skip) {
+ default:
+ Move(s,t,skip,char);
+ s += skip;
+ t += skip;
+ break;
case 7: *t++ = *s++;
case 6: *t++ = *s++;
case 5: *t++ = *s++;
value = SvNV(sv);
/* Formats aren't yet marked for locales, so assume "yes". */
{
- RESTORE_NUMERIC_LOCAL();
+ STORE_NUMERIC_STANDARD_SET_LOCAL();
#if defined(USE_LONG_DOUBLE)
if (arg & 256) {
sprintf(t, "%#*.*" PERL_PRIfldbl,
t += fieldsize;
break;
+ case FF_0DECIMAL:
+ /* If the field is marked with ^ and the value is undefined,
+ blank it out. */
+ arg = *fpc++;
+ if ((arg & 512) && !SvOK(sv)) {
+ arg = fieldsize;
+ while (arg--)
+ *t++ = ' ';
+ break;
+ }
+ gotsome = TRUE;
+ value = SvNV(sv);
+ /* Formats aren't yet marked for locales, so assume "yes". */
+ {
+ STORE_NUMERIC_STANDARD_SET_LOCAL();
+#if defined(USE_LONG_DOUBLE)
+ if (arg & 256) {
+ sprintf(t, "%#0*.*" PERL_PRIfldbl,
+ (int) fieldsize, (int) arg & 255, value);
+/* is this legal? I don't have long doubles */
+ } else {
+ sprintf(t, "%0*.0" PERL_PRIfldbl, (int) fieldsize, value);
+ }
+#else
+ if (arg & 256) {
+ sprintf(t, "%#0*.*f",
+ (int) fieldsize, (int) arg & 255, value);
+ } else {
+ sprintf(t, "%0*.0f",
+ (int) fieldsize, value);
+ }
+#endif
+ RESTORE_NUMERIC_STANDARD();
+ }
+ t += fieldsize;
+ break;
+
case FF_NEWLINE:
f++;
while (t-- > linemark && *t == ' ') ;
PP(pp_grepstart)
{
- djSP;
+ dSP;
SV *src;
if (PL_stack_base + *PL_markstack_ptr == SP) {
ENTER; /* enter outer scope */
SAVETMPS;
- /* SAVE_DEFSV does *not* suffice here for USE_THREADS */
+ /* SAVE_DEFSV does *not* suffice here for USE_5005THREADS */
SAVESPTR(DEFSV);
ENTER; /* enter inner scope */
SAVEVPTR(PL_curpm);
PP(pp_mapwhile)
{
- djSP;
- I32 diff = (SP - PL_stack_base) - *PL_markstack_ptr;
+ dSP;
+ I32 items = (SP - PL_stack_base) - *PL_markstack_ptr; /* how many new items */
I32 count;
I32 shift;
SV** src;
- SV** dst;
+ SV** dst;
+ /* first, move source pointer to the next item in the source list */
++PL_markstack_ptr[-1];
- if (diff) {
- if (diff > PL_markstack_ptr[-1] - PL_markstack_ptr[-2]) {
- shift = diff - (PL_markstack_ptr[-1] - PL_markstack_ptr[-2]);
- count = (SP - PL_stack_base) - PL_markstack_ptr[-1] + 2;
-
+
+ /* if there are new items, push them into the destination list */
+ if (items) {
+ /* might need to make room back there first */
+ if (items > PL_markstack_ptr[-1] - PL_markstack_ptr[-2]) {
+ /* XXX this implementation is very pessimal because the stack
+ * is repeatedly extended for every set of items. Is possible
+ * to do this without any stack extension or copying at all
+ * by maintaining a separate list over which the map iterates
+ * (like foreach does). --gsar */
+
+ /* everything in the stack after the destination list moves
+ * towards the end the stack by the amount of room needed */
+ shift = items - (PL_markstack_ptr[-1] - PL_markstack_ptr[-2]);
+
+ /* items to shift up (accounting for the moved source pointer) */
+ count = (SP - PL_stack_base) - (PL_markstack_ptr[-1] - 1);
+
+ /* This optimization is by Ben Tilly and it does
+ * things differently from what Sarathy (gsar)
+ * is describing. The downside of this optimization is
+ * that leaves "holes" (uninitialized and hopefully unused areas)
+ * to the Perl stack, but on the other hand this
+ * shouldn't be a problem. If Sarathy's idea gets
+ * implemented, this optimization should become
+ * irrelevant. --jhi */
+ if (shift < count)
+ shift = count; /* Avoid shifting too often --Ben Tilly */
+
EXTEND(SP,shift);
src = SP;
dst = (SP += shift);
PL_markstack_ptr[-1] += shift;
*PL_markstack_ptr += shift;
- while (--count)
+ while (count--)
*dst-- = *src--;
}
- dst = PL_stack_base + (PL_markstack_ptr[-2] += diff) - 1;
- ++diff;
- while (--diff)
- *dst-- = SvTEMP(TOPs) ? POPs : sv_mortalcopy(POPs);
+ /* copy the new items down to the destination list */
+ dst = PL_stack_base + (PL_markstack_ptr[-2] += items) - 1;
+ while (items--)
+ *dst-- = SvTEMP(TOPs) ? POPs : sv_mortalcopy(POPs);
}
LEAVE; /* exit inner scope */
/* All done yet? */
if (PL_markstack_ptr[-1] > *PL_markstack_ptr) {
- I32 items;
I32 gimme = GIMME_V;
(void)POPMARK; /* pop top */
ENTER; /* enter inner scope */
SAVEVPTR(PL_curpm);
+ /* set $_ to the new source item */
src = PL_stack_base[PL_markstack_ptr[-1]];
SvTEMP_off(src);
DEFSV = src;
PP(pp_sort)
{
- djSP; dMARK; dORIGMARK;
+ dSP; dMARK; dORIGMARK;
register SV **up;
SV **myorigmark = ORIGMARK;
register I32 max;
HV *stash;
GV *gv;
- CV *cv;
+ CV *cv = 0;
I32 gimme = GIMME;
OP* nextop = PL_op->op_next;
I32 overloading = 0;
PL_secondgv = gv_fetchpv("b", TRUE, SVt_PV);
PL_sortstash = stash;
}
+#ifdef USE_5005THREADS
+ sv_lock((SV *)PL_firstgv);
+ sv_lock((SV *)PL_secondgv);
+#endif
SAVESPTR(GvSV(PL_firstgv));
SAVESPTR(GvSV(PL_secondgv));
}
/* This is mostly copied from pp_entersub */
AV *av = (AV*)PL_curpad[0];
-#ifndef USE_THREADS
+#ifndef USE_5005THREADS
cx->blk_sub.savearray = GvAV(PL_defgv);
GvAV(PL_defgv) = (AV*)SvREFCNT_inc(av);
-#endif /* USE_THREADS */
+#endif /* USE_5005THREADS */
+ cx->blk_sub.oldcurpad = PL_curpad;
cx->blk_sub.argarray = av;
}
qsortsv((myorigmark+1), max,
? ( (PL_op->op_private & OPpSORT_INTEGER)
? ( overloading ? amagic_i_ncmp : sv_i_ncmp)
: ( overloading ? amagic_ncmp : sv_ncmp))
- : ( (PL_op->op_private & OPpLOCALE)
+ : ( IN_LOCALE_RUNTIME
? ( overloading
? amagic_cmp_locale
: sv_cmp_locale_static)
PP(pp_flip)
{
- djSP;
+ dSP;
if (GIMME == G_ARRAY) {
RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
else {
dTOPss;
SV *targ = PAD_SV(PL_op->op_targ);
-
- if ((PL_op->op_private & OPpFLIP_LINENUM)
- ? (PL_last_in_gv && SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv)))
- : SvTRUE(sv) ) {
+ int flip;
+
+ if (PL_op->op_private & OPpFLIP_LINENUM) {
+ struct io *gp_io;
+ flip = PL_last_in_gv
+ && (gp_io = GvIO(PL_last_in_gv))
+ && SvIV(sv) == (IV)IoLINES(gp_io);
+ } else {
+ flip = SvTRUE(sv);
+ }
+ if (flip) {
sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
if (PL_op->op_flags & OPf_SPECIAL) {
sv_setiv(targ, 1);
PP(pp_flop)
{
- djSP;
+ dSP;
if (GIMME == G_ARRAY) {
dPOPPOPssrl;
SV *targ = PAD_SV(cUNOP->op_first->op_targ);
sv_inc(targ);
if ((PL_op->op_private & OPpFLIP_LINENUM)
- ? (PL_last_in_gv && SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv)))
+ ? (GvIO(PL_last_in_gv)
+ && SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv)))
: SvTRUE(sv) ) {
sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
sv_catpv(targ, "E0");
STATIC I32
S_dopoptolabel(pTHX_ char *label)
{
- dTHR;
register I32 i;
register PERL_CONTEXT *cx;
switch (CxTYPE(cx)) {
case CXt_SUBST:
if (ckWARN(WARN_EXITING))
- Perl_warner(aTHX_ WARN_EXITING, "Exiting substitution via %s",
- PL_op_name[PL_op->op_type]);
+ Perl_warner(aTHX_ WARN_EXITING, "Exiting substitution via %s",
+ OP_NAME(PL_op));
break;
case CXt_SUB:
if (ckWARN(WARN_EXITING))
- Perl_warner(aTHX_ WARN_EXITING, "Exiting subroutine via %s",
- PL_op_name[PL_op->op_type]);
+ Perl_warner(aTHX_ WARN_EXITING, "Exiting subroutine via %s",
+ OP_NAME(PL_op));
break;
case CXt_FORMAT:
if (ckWARN(WARN_EXITING))
- Perl_warner(aTHX_ WARN_EXITING, "Exiting format via %s",
- PL_op_name[PL_op->op_type]);
+ Perl_warner(aTHX_ WARN_EXITING, "Exiting format via %s",
+ OP_NAME(PL_op));
break;
case CXt_EVAL:
if (ckWARN(WARN_EXITING))
- Perl_warner(aTHX_ WARN_EXITING, "Exiting eval via %s",
- PL_op_name[PL_op->op_type]);
+ Perl_warner(aTHX_ WARN_EXITING, "Exiting eval via %s",
+ OP_NAME(PL_op));
break;
case CXt_NULL:
if (ckWARN(WARN_EXITING))
- Perl_warner(aTHX_ WARN_EXITING, "Exiting pseudo-block via %s",
- PL_op_name[PL_op->op_type]);
+ Perl_warner(aTHX_ WARN_EXITING, "Exiting pseudo-block via %s",
+ OP_NAME(PL_op));
return -1;
case CXt_LOOP:
if (!cx->blk_loop.label ||
I32
Perl_block_gimme(pTHX)
{
- dTHR;
I32 cxix;
cxix = dopoptosub(cxstack_ix);
}
}
+I32
+Perl_is_lvalue_sub(pTHX)
+{
+ I32 cxix;
+
+ cxix = dopoptosub(cxstack_ix);
+ assert(cxix >= 0); /* We should only be called from inside subs */
+
+ if (cxstack[cxix].blk_sub.lval && CvLVALUE(cxstack[cxix].blk_sub.cv))
+ return cxstack[cxix].blk_sub.lval;
+ else
+ return 0;
+}
+
STATIC I32
S_dopoptosub(pTHX_ I32 startingblock)
{
- dTHR;
return dopoptosub_at(cxstack, startingblock);
}
STATIC I32
S_dopoptosub_at(pTHX_ PERL_CONTEXT *cxstk, I32 startingblock)
{
- dTHR;
I32 i;
register PERL_CONTEXT *cx;
for (i = startingblock; i >= 0; i--) {
STATIC I32
S_dopoptoeval(pTHX_ I32 startingblock)
{
- dTHR;
I32 i;
register PERL_CONTEXT *cx;
for (i = startingblock; i >= 0; i--) {
STATIC I32
S_dopoptoloop(pTHX_ I32 startingblock)
{
- dTHR;
I32 i;
register PERL_CONTEXT *cx;
for (i = startingblock; i >= 0; i--) {
switch (CxTYPE(cx)) {
case CXt_SUBST:
if (ckWARN(WARN_EXITING))
- Perl_warner(aTHX_ WARN_EXITING, "Exiting substitution via %s",
- PL_op_name[PL_op->op_type]);
+ Perl_warner(aTHX_ WARN_EXITING, "Exiting substitution via %s",
+ OP_NAME(PL_op));
break;
case CXt_SUB:
if (ckWARN(WARN_EXITING))
- Perl_warner(aTHX_ WARN_EXITING, "Exiting subroutine via %s",
- PL_op_name[PL_op->op_type]);
+ Perl_warner(aTHX_ WARN_EXITING, "Exiting subroutine via %s",
+ OP_NAME(PL_op));
break;
case CXt_FORMAT:
if (ckWARN(WARN_EXITING))
- Perl_warner(aTHX_ WARN_EXITING, "Exiting format via %s",
- PL_op_name[PL_op->op_type]);
+ Perl_warner(aTHX_ WARN_EXITING, "Exiting format via %s",
+ OP_NAME(PL_op));
break;
case CXt_EVAL:
if (ckWARN(WARN_EXITING))
- Perl_warner(aTHX_ WARN_EXITING, "Exiting eval via %s",
- PL_op_name[PL_op->op_type]);
+ Perl_warner(aTHX_ WARN_EXITING, "Exiting eval via %s",
+ OP_NAME(PL_op));
break;
case CXt_NULL:
if (ckWARN(WARN_EXITING))
- Perl_warner(aTHX_ WARN_EXITING, "Exiting pseudo-block via %s",
- PL_op_name[PL_op->op_type]);
+ Perl_warner(aTHX_ WARN_EXITING, "Exiting pseudo-block via %s",
+ OP_NAME(PL_op));
return -1;
case CXt_LOOP:
DEBUG_l( Perl_deb(aTHX_ "(Found loop #%ld)\n", (long)i));
void
Perl_dounwind(pTHX_ I32 cxix)
{
- dTHR;
register PERL_CONTEXT *cx;
I32 optype;
}
}
-/*
- * Closures mentioned at top level of eval cannot be referenced
- * again, and their presence indirectly causes a memory leak.
- * (Note that the fact that compcv and friends are still set here
- * is, AFAIK, an accident.) --Chip
- *
- * XXX need to get comppad et al from eval's cv rather than
- * relying on the incidental global values.
- */
-STATIC void
-S_free_closures(pTHX)
-{
- dTHR;
- SV **svp = AvARRAY(PL_comppad_name);
- I32 ix;
- for (ix = AvFILLp(PL_comppad_name); ix >= 0; ix--) {
- SV *sv = svp[ix];
- if (sv && sv != &PL_sv_undef && *SvPVX(sv) == '&') {
- SvREFCNT_dec(sv);
- svp[ix] = &PL_sv_undef;
-
- sv = PL_curpad[ix];
- if (CvCLONE(sv)) {
- SvREFCNT_dec(CvOUTSIDE(sv));
- CvOUTSIDE(sv) = Nullcv;
- }
- else {
- SvREFCNT_dec(sv);
- sv = NEWSV(0,0);
- SvPADTMP_on(sv);
- PL_curpad[ix] = sv;
- }
- }
- }
-}
-
void
Perl_qerror(pTHX_ SV *err)
{
}
}
}
- else
+ else {
sv_setpvn(ERRSV, message, msglen);
+ }
}
else
message = SvPVx(ERRSV, msglen);
LEAVE;
+ /* LEAVE could clobber PL_curcop (see save_re_context())
+ * XXX it might be better to find a way to avoid messing with
+ * PL_curcop in save_re_context() instead, but this is a more
+ * minimal fix --GSAR */
+ PL_curcop = cx->blk_oldcop;
+
if (optype == OP_REQUIRE) {
char* msg = SvPVx(ERRSV, n_a);
DIE(aTHX_ "%sCompilation failed in require",
#endif
PerlIO *serr = Perl_error_log;
- PerlIO_write(serr, message, msglen);
+ PERL_WRITE_MSG_TO_CONSOLE(serr, message, msglen);
(void)PerlIO_flush(serr);
#ifdef USE_SFIO
errno = e;
PP(pp_xor)
{
- djSP; dPOPTOPssrl;
+ dSP; dPOPTOPssrl;
if (SvTRUE(left) != SvTRUE(right))
RETSETYES;
else
PP(pp_andassign)
{
- djSP;
+ dSP;
if (!SvTRUE(TOPs))
RETURN;
else
PP(pp_orassign)
{
- djSP;
+ dSP;
if (SvTRUE(TOPs))
RETURN;
else
PP(pp_caller)
{
- djSP;
+ dSP;
register I32 cxix = dopoptosub(cxstack_ix);
register PERL_CONTEXT *cx;
register PERL_CONTEXT *ccstack = cxstack;
if (MAXARG)
count = POPi;
- EXTEND(SP, 10);
+
for (;;) {
/* we may be in a higher stacklevel, so dig down deeper */
while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
cxix = dopoptosub_at(ccstack, top_si->si_cxix);
}
if (cxix < 0) {
- if (GIMME != G_ARRAY)
+ if (GIMME != G_ARRAY) {
+ EXTEND(SP, 1);
RETPUSHUNDEF;
+ }
RETURN;
}
if (PL_DBsub && cxix >= 0 &&
stashname = CopSTASHPV(cx->blk_oldcop);
if (GIMME != G_ARRAY) {
+ EXTEND(SP, 1);
if (!stashname)
PUSHs(&PL_sv_undef);
else {
RETURN;
}
+ EXTEND(SP, 10);
+
if (!stashname)
PUSHs(&PL_sv_undef);
else
PL_dbargs = GvAV(gv_AVadd(tmpgv = gv_fetchpv("DB::args", TRUE,
SVt_PVAV)));
GvMULTI_on(tmpgv);
- AvREAL_off(PL_dbargs); /* XXX Should be REIFY */
+ AvREAL_off(PL_dbargs); /* XXX should be REIFY (see av.h) */
}
if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
SV * mask ;
SV * old_warnings = cx->blk_oldcop->cop_warnings ;
- if (old_warnings == pWARN_NONE ||
+ if (old_warnings == pWARN_NONE ||
(old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0))
mask = newSVpvn(WARN_NONEstring, WARNsize) ;
- else if (old_warnings == pWARN_ALL ||
+ else if (old_warnings == pWARN_ALL ||
(old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON))
mask = newSVpvn(WARN_ALLstring, WARNsize) ;
else
PP(pp_reset)
{
- djSP;
+ dSP;
char *tmps;
STRLEN n_a;
if (PL_op->op_private || SvIV(PL_DBsingle) || SvIV(PL_DBsignal) || SvIV(PL_DBtrace))
{
- djSP;
+ dSP;
register CV *cv;
register PERL_CONTEXT *cx;
I32 gimme = G_ARRAY;
if (!cv)
DIE(aTHX_ "No DB::DB routine defined");
- if (CvDEPTH(cv) >= 1 && !(PL_debug & (1<<30))) /* don't do recursive DB::DB call */
+ if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG))
+ /* don't do recursive DB::DB call */
return NORMAL;
ENTER;
PP(pp_enteriter)
{
- djSP; dMARK;
+ dSP; dMARK;
register PERL_CONTEXT *cx;
I32 gimme = GIMME_V;
SV **svp;
ENTER;
SAVETMPS;
-#ifdef USE_THREADS
+#ifdef USE_5005THREADS
if (PL_op->op_flags & OPf_SPECIAL) {
- dTHR;
svp = &THREADSV(PL_op->op_targ); /* per-thread variable */
SAVEGENERICSV(*svp);
*svp = NEWSV(0,0);
}
else
-#endif /* USE_THREADS */
+#endif /* USE_5005THREADS */
if (PL_op->op_targ) {
+#ifndef USE_ITHREADS
svp = &PL_curpad[PL_op->op_targ]; /* "my" variable */
SAVESPTR(*svp);
-#ifdef USE_ITHREADS
- iterdata = (void*)PL_op->op_targ;
+#else
+ SAVEPADSV(PL_op->op_targ);
+ iterdata = INT2PTR(void*, PL_op->op_targ);
cxtype |= CXp_PADVAR;
#endif
}
PP(pp_enterloop)
{
- djSP;
+ dSP;
register PERL_CONTEXT *cx;
I32 gimme = GIMME_V;
PP(pp_leaveloop)
{
- djSP;
+ dSP;
register PERL_CONTEXT *cx;
I32 gimme;
SV **newsp;
PP(pp_return)
{
- djSP; dMARK;
+ dSP; dMARK;
I32 cxix;
register PERL_CONTEXT *cx;
bool popsub2 = FALSE;
POPEVAL(cx);
if (CxTRYBLOCK(cx))
break;
- if (AvFILLp(PL_comppad_name) >= 0)
- free_closures();
lex_end();
if (optype == OP_REQUIRE &&
(MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
PP(pp_last)
{
- djSP;
+ dSP;
I32 cxix;
register PERL_CONTEXT *cx;
I32 pop2 = 0;
}
*ops = 0;
if (o->op_flags & OPf_KIDS) {
- dTHR;
/* First try all the kids at this level, since that's likeliest. */
for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
PP(pp_goto)
{
- djSP;
+ dSP;
OP *retop = 0;
I32 ix;
register PERL_CONTEXT *cx;
if (cxix < cxstack_ix)
dounwind(cxix);
TOPBLOCK(cx);
- if (CxTYPE(cx) == CXt_EVAL && cx->blk_eval.old_op_type == OP_ENTEREVAL)
+ if (CxREALEVAL(cx))
DIE(aTHX_ "Can't goto subroutine from an eval-string");
mark = PL_stack_sp;
if (CxTYPE(cx) == CXt_SUB && cx->blk_sub.hasargs) {
EXTEND(PL_stack_sp, items); /* @_ could have been extended. */
Copy(AvARRAY(av), PL_stack_sp, items, SV*);
PL_stack_sp += items;
-#ifndef USE_THREADS
+#ifndef USE_5005THREADS
SvREFCNT_dec(GvAV(PL_defgv));
GvAV(PL_defgv) = cx->blk_sub.savearray;
-#endif /* USE_THREADS */
+#endif /* USE_5005THREADS */
/* abandon @_ if it got reified */
if (AvREAL(av)) {
(void)sv_2mortal((SV*)av); /* delay until return */
}
else if (CvXSUB(cv)) { /* put GvAV(defgv) back onto stack */
AV* av;
-#ifdef USE_THREADS
+#ifdef USE_5005THREADS
av = (AV*)PL_curpad[0];
#else
av = GvAV(PL_defgv);
PL_stack_sp--; /* There is no cv arg. */
/* Push a mark for the start of arglist */
- PUSHMARK(mark);
- (void)(*CvXSUB(cv))(aTHXo_ cv);
+ PUSHMARK(mark);
+ (void)(*CvXSUB(cv))(aTHX_ cv);
/* Pop the current context like a decent sub should */
POPBLOCK(cx, PL_curpm);
/* Do _not_ use PUTBACK, keep the XSUB's return stack! */
svp = AvARRAY(padlist);
}
}
-#ifdef USE_THREADS
+#ifdef USE_5005THREADS
if (!cx->blk_sub.hasargs) {
AV* av = (AV*)PL_curpad[0];
-
+
items = AvFILLp(av) + 1;
if (items) {
/* Mark is at the end of the stack. */
EXTEND(SP, items);
Copy(AvARRAY(av), SP + 1, items, SV*);
SP += items;
- PUTBACK ;
+ PUTBACK ;
}
}
-#endif /* USE_THREADS */
+#endif /* USE_5005THREADS */
SAVEVPTR(PL_curpad);
PL_curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
-#ifndef USE_THREADS
+#ifndef USE_5005THREADS
if (cx->blk_sub.hasargs)
-#endif /* USE_THREADS */
+#endif /* USE_5005THREADS */
{
AV* av = (AV*)PL_curpad[0];
SV** ary;
-#ifndef USE_THREADS
+#ifndef USE_5005THREADS
cx->blk_sub.savearray = GvAV(PL_defgv);
GvAV(PL_defgv) = (AV*)SvREFCNT_inc(av);
-#endif /* USE_THREADS */
+#endif /* USE_5005THREADS */
+ cx->blk_sub.oldcurpad = PL_curpad;
cx->blk_sub.argarray = av;
++mark;
*/
SV *sv = GvSV(PL_DBsub);
CV *gotocv;
-
+
if (PERLDB_SUB_NN) {
SvIVX(sv) = PTR2IV(cv); /* Already upgraded, saved */
} else {
if (label && *label) {
OP *gotoprobe = 0;
+ bool leaving_eval = FALSE;
+ PERL_CONTEXT *last_eval_cx = 0;
/* find label */
cx = &cxstack[ix];
switch (CxTYPE(cx)) {
case CXt_EVAL:
- gotoprobe = PL_eval_root; /* XXX not good for nested eval */
- break;
+ leaving_eval = TRUE;
+ if (CxREALEVAL(cx)) {
+ gotoprobe = (last_eval_cx ?
+ last_eval_cx->blk_eval.old_eval_root :
+ PL_eval_root);
+ last_eval_cx = cx;
+ break;
+ }
+ /* else fall through */
case CXt_LOOP:
gotoprobe = cx->blk_oldcop->op_sibling;
break;
if (!retop)
DIE(aTHX_ "Can't find label %s", label);
+ /* if we're leaving an eval, check before we pop any frames
+ that we're not going to punt, otherwise the error
+ won't be caught */
+
+ if (leaving_eval && *enterops && enterops[1]) {
+ I32 i;
+ for (i = 1; enterops[i]; i++)
+ if (enterops[i]->op_type == OP_ENTERITER)
+ DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
+ }
+
/* pop unwanted frames */
if (ix < cxstack_ix) {
PP(pp_exit)
{
- djSP;
+ dSP;
I32 anum;
if (MAXARG < 1)
#ifdef NOTYET
PP(pp_nswitch)
{
- djSP;
+ dSP;
NV value = SvNVx(GvSV(cCOP->cop_gv));
register I32 match = I_32(value);
PP(pp_cswitch)
{
- djSP;
+ dSP;
register I32 match;
if (PL_multiline)
STATIC OP *
S_docatch(pTHX_ OP *o)
{
- dTHR;
int ret;
OP *oldop = PL_op;
volatile PERL_SI *cursi = PL_curstackinfo;
/* switch to eval mode */
if (PL_curcop == &PL_compiling) {
- SAVECOPSTASH(&PL_compiling);
+ SAVECOPSTASH_FREE(&PL_compiling);
CopSTASH_set(&PL_compiling, PL_curstash);
}
- SAVECOPFILE(&PL_compiling);
- SAVECOPLINE(&PL_compiling);
if (PERLDB_NAMEEVAL && CopLINE(PL_curcop)) {
SV *sv = sv_newmortal();
Perl_sv_setpvf(aTHX_ sv, "_<(%.10seval %lu)[%s:%"IVdf"]",
}
else
sprintf(tmpbuf, "_<(%.10s_eval %lu)", code, (unsigned long)++PL_evalseq);
+ SAVECOPFILE_FREE(&PL_compiling);
CopFILE_set(&PL_compiling, tmpbuf+2);
+ SAVECOPLINE(&PL_compiling);
CopLINE_set(&PL_compiling, 1);
/* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
deleting the eval's FILEGV from the stash before gv_check() runs
#else
SAVEVPTR(PL_op);
#endif
- PL_hints = 0;
+ PL_hints &= HINT_UTF8;
PL_op = &dummy;
PL_op->op_type = OP_ENTEREVAL;
PL_op->op_flags = 0; /* Avoid uninit warning. */
- PUSHBLOCK(cx, CXt_EVAL, SP);
+ PUSHBLOCK(cx, CXt_EVAL|(PL_curcop == &PL_compiling ? 0 : CXp_REAL), SP);
PUSHEVAL(cx, 0, Nullgv);
rop = doeval(G_SCALAR, startop);
POPBLOCK(cx,PL_curpm);
return rop;
}
-/* With USE_THREADS, eval_owner must be held on entry to doeval */
+/* With USE_5005THREADS, eval_owner must be held on entry to doeval */
STATIC OP *
S_doeval(pTHX_ int gimme, OP** startop)
{
AV* comppadlist;
I32 i;
- PL_in_eval = EVAL_INEVAL;
+ PL_in_eval = ((saveop && saveop->op_type == OP_REQUIRE)
+ ? (EVAL_INREQUIRE | (PL_in_eval & EVAL_INEVAL))
+ : EVAL_INEVAL);
PUSHMARK(SP);
PL_compcv = (CV*)NEWSV(1104,0);
sv_upgrade((SV *)PL_compcv, SVt_PVCV);
CvEVAL_on(PL_compcv);
-#ifdef USE_THREADS
+ assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
+ cxstack[cxstack_ix].blk_eval.cv = PL_compcv;
+
+#ifdef USE_5005THREADS
CvOWNER(PL_compcv) = 0;
New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
MUTEX_INIT(CvMUTEXP(PL_compcv));
-#endif /* USE_THREADS */
+#endif /* USE_5005THREADS */
PL_comppad = newAV();
av_push(PL_comppad, Nullsv);
PL_comppad_name_fill = 0;
PL_min_intro_pending = 0;
PL_padix = 0;
-#ifdef USE_THREADS
+#ifdef USE_5005THREADS
av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
PL_curpad[0] = (SV*)newAV();
SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
-#endif /* USE_THREADS */
+#endif /* USE_5005THREADS */
comppadlist = newAV();
AvREAL_off(comppadlist);
CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc(caller);
}
- SAVEFREESV(PL_compcv);
+ SAVEMORTALIZESV(PL_compcv); /* must remain until end of current statement */
/* make sure we compile in the right package */
PL_error_count = 0;
PL_curcop = &PL_compiling;
PL_curcop->cop_arybase = 0;
- SvREFCNT_dec(PL_rs);
- PL_rs = newSVpvn("\n", 1);
if (saveop && saveop->op_flags & OPf_SPECIAL)
PL_in_eval |= EVAL_KEEPERR;
else
Perl_croak(aTHX_ "%sCompilation failed in regexp",
(*msg ? msg : "Unknown error\n"));
}
- SvREFCNT_dec(PL_rs);
- PL_rs = SvREFCNT_inc(PL_nrs);
-#ifdef USE_THREADS
+#ifdef USE_5005THREADS
MUTEX_LOCK(&PL_eval_mutex);
PL_eval_owner = 0;
COND_SIGNAL(&PL_eval_cond);
MUTEX_UNLOCK(&PL_eval_mutex);
-#endif /* USE_THREADS */
+#endif /* USE_5005THREADS */
RETPUSHUNDEF;
}
- SvREFCNT_dec(PL_rs);
- PL_rs = SvREFCNT_inc(PL_nrs);
CopLINE_set(&PL_compiling, 0);
if (startop) {
*startop = PL_eval_root;
CvDEPTH(PL_compcv) = 1;
SP = PL_stack_base + POPMARK; /* pop original mark */
PL_op = saveop; /* The caller may need it. */
-#ifdef USE_THREADS
+ PL_lex_state = LEX_NOTPARSING; /* $^S needs this. */
+#ifdef USE_5005THREADS
MUTEX_LOCK(&PL_eval_mutex);
PL_eval_owner = 0;
COND_SIGNAL(&PL_eval_cond);
MUTEX_UNLOCK(&PL_eval_mutex);
-#endif /* USE_THREADS */
+#endif /* USE_5005THREADS */
RETURNOP(PL_eval_start);
}
PP(pp_require)
{
- djSP;
+ dSP;
register PERL_CONTEXT *cx;
SV *sv;
char *name;
STRLEN len;
- char *tryname;
+ char *tryname = Nullch;
SV *namesv = Nullsv;
SV** svp;
- I32 gimme = G_SCALAR;
+ I32 gimme = GIMME_V;
PerlIO *tryrsfp = 0;
STRLEN n_a;
int filter_has_file = 0;
GV *filter_child_proc = 0;
SV *filter_state = 0;
SV *filter_sub = 0;
+ SV *hook_sv = 0;
sv = POPs;
if (SvNIOKp(sv)) {
- if (SvPOK(sv) && SvNOK(sv)) { /* require v5.6.1 */
+ if (SvPOK(sv) && SvNOK(sv) && SvNV(sv)) { /* require v5.6.1 */
UV rev = 0, ver = 0, sver = 0;
- I32 len;
+ STRLEN len;
U8 *s = (U8*)SvPVX(sv);
U8 *end = (U8*)SvPVX(sv) + SvCUR(sv);
if (s < end) {
- rev = utf8_to_uv(s, &len);
+ rev = utf8n_to_uvchr(s, end - s, &len, 0);
s += len;
if (s < end) {
- ver = utf8_to_uv(s, &len);
+ ver = utf8n_to_uvchr(s, end - s, &len, 0);
s += len;
if (s < end)
- sver = utf8_to_uv(s, &len);
+ sver = utf8n_to_uvchr(s, end - s, &len, 0);
}
}
if (PERL_REVISION < rev
"v%d.%d.%d, stopped", rev, ver, sver, PERL_REVISION,
PERL_VERSION, PERL_SUBVERSION);
}
+ if (ckWARN(WARN_PORTABLE))
+ Perl_warner(aTHX_ WARN_PORTABLE,
+ "v-string in use/require non-portable");
RETPUSHYES;
}
else if (!SvPOKp(sv)) { /* require 5.005_03 */
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?)",
+ " (did you mean v%"UVuf".%03"UVuf"?)",
rev, ver, sver, PERL_REVISION, PERL_VERSION,
PERL_SUBVERSION, rev, ver/100);
}
/* prepare to compile file */
+#ifdef MACOS_TRADITIONAL
if (PERL_FILE_IS_ABSOLUTE(name)
- || (*name == '.' && (name[1] == '/' ||
- (name[1] == '.' && name[2] == '/'))))
+ || (*name == ':' && name[1] != ':' && strchr(name+2, ':')))
{
tryname = name;
tryrsfp = doopen_pmc(name,PERL_SCRIPT_MODE);
-#ifdef MACOS_TRADITIONAL
/* We consider paths of the form :a:b ambiguous and interpret them first
as global then as local
*/
- if (!tryrsfp && name[0] == ':' && name[1] != ':' && strchr(name+2, ':'))
+ if (!tryrsfp && *name == ':' && name[1] != ':' && strchr(name+2, ':'))
goto trylocal;
}
- else
+ else
trylocal: {
#else
+ if (PERL_FILE_IS_ABSOLUTE(name)
+ || (*name == '.' && (name[1] == '/' ||
+ (name[1] == '.' && name[2] == '/'))))
+ {
+ tryname = name;
+ tryrsfp = doopen_pmc(name,PERL_SCRIPT_MODE);
}
else {
#endif
int count;
SV *loader = dirsv;
- if (SvTYPE(SvRV(loader)) == SVt_PVAV) {
+ if (SvTYPE(SvRV(loader)) == SVt_PVAV
+ && !sv_isobject(loader))
+ {
loader = *av_fetch((AV *)SvRV(loader), 0, TRUE);
}
Perl_sv_setpvf(aTHX_ namesv, "/loader/0x%"UVxf"/%s",
- PTR2UV(SvANY(loader)), name);
+ PTR2UV(SvRV(dirsv)), name);
tryname = SvPVX(namesv);
tryrsfp = 0;
PUSHs(dirsv);
PUSHs(sv);
PUTBACK;
- count = call_sv(loader, G_ARRAY);
+ if (sv_isobject(loader))
+ count = call_method("INC", G_ARRAY);
+ else
+ count = call_sv(loader, G_ARRAY);
SPAGAIN;
if (count > 0) {
if (io) {
tryrsfp = IoIFP(io);
- if (IoTYPE(io) == '|') {
+ if (IoTYPE(io) == IoTYPE_PIPE) {
/* reading from a child process doesn't
nest -- when returning from reading
the inner module, the outer one is
LEAVE;
if (tryrsfp) {
+ hook_sv = dirsv;
break;
}
else {
char *dir = SvPVx(dirsv, n_a);
#ifdef MACOS_TRADITIONAL
- /* We have ensured in incpush that library ends with ':' */
- Perl_sv_setpvf(aTHX_ namesv, "%s%s", dir, name+(name[0] == ':'));
+ char buf[256];
+ Perl_sv_setpvf(aTHX_ namesv, "%s%s", MacPerl_CanonDir(dir, buf), name+(name[0] == ':'));
#else
#ifdef VMS
char *unixdir;
}
}
}
- SAVECOPFILE(&PL_compiling);
+ SAVECOPFILE_FREE(&PL_compiling);
CopFILE_set(&PL_compiling, tryrsfp ? tryname : name);
SvREFCNT_dec(namesv);
if (!tryrsfp) {
/* Assume success here to prevent recursive requirement. */
(void)hv_store(GvHVn(PL_incgv), name, strlen(name),
- newSVpv(CopFILE(&PL_compiling), 0), 0 );
+ (hook_sv ? SvREFCNT_inc(hook_sv)
+ : newSVpv(CopFILE(&PL_compiling), 0)),
+ 0 );
ENTER;
SAVETMPS;
PL_compiling.cop_warnings = pWARN_ALL ;
else if (PL_dowarn & G_WARN_ALL_OFF)
PL_compiling.cop_warnings = pWARN_NONE ;
- else
+ else
PL_compiling.cop_warnings = pWARN_STD ;
+ SAVESPTR(PL_compiling.cop_io);
+ PL_compiling.cop_io = Nullsv;
if (filter_sub || filter_child_proc) {
SV *datasv = filter_add(run_user_filter, Nullsv);
CopLINE_set(&PL_compiling, 0);
PUTBACK;
-#ifdef USE_THREADS
+#ifdef USE_5005THREADS
MUTEX_LOCK(&PL_eval_mutex);
if (PL_eval_owner && PL_eval_owner != thr)
while (PL_eval_owner)
COND_WAIT(&PL_eval_cond, &PL_eval_mutex);
PL_eval_owner = thr;
MUTEX_UNLOCK(&PL_eval_mutex);
-#endif /* USE_THREADS */
- return DOCATCH(doeval(G_SCALAR, NULL));
+#endif /* USE_5005THREADS */
+ return DOCATCH(doeval(gimme, NULL));
}
PP(pp_dofile)
PP(pp_entereval)
{
- djSP;
+ dSP;
register PERL_CONTEXT *cx;
dPOPss;
I32 gimme = GIMME_V, was = PL_sub_generation;
ENTER;
lex_start(sv);
SAVETMPS;
-
+
/* switch to eval mode */
- SAVECOPFILE(&PL_compiling);
if (PERLDB_NAMEEVAL && CopLINE(PL_curcop)) {
SV *sv = sv_newmortal();
Perl_sv_setpvf(aTHX_ sv, "_<(eval %lu)[%s:%"IVdf"]",
}
else
sprintf(tmpbuf, "_<(eval %lu)", (unsigned long)++PL_evalseq);
+ SAVECOPFILE_FREE(&PL_compiling);
CopFILE_set(&PL_compiling, tmpbuf+2);
+ SAVECOPLINE(&PL_compiling);
CopLINE_set(&PL_compiling, 1);
/* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
deleting the eval's FILEGV from the stash before gv_check() runs
PL_compiling.cop_warnings = newSVsv(PL_curcop->cop_warnings);
SAVEFREESV(PL_compiling.cop_warnings);
}
+ SAVESPTR(PL_compiling.cop_io);
+ if (specialCopIO(PL_curcop->cop_io))
+ PL_compiling.cop_io = PL_curcop->cop_io;
+ else {
+ PL_compiling.cop_io = newSVsv(PL_curcop->cop_io);
+ SAVEFREESV(PL_compiling.cop_io);
+ }
push_return(PL_op->op_next);
PUSHBLOCK(cx, (CXt_EVAL|CXp_REAL), SP);
if (PERLDB_LINE && PL_curstash != PL_debstash)
save_lines(CopFILEAV(&PL_compiling), PL_linestr);
PUTBACK;
-#ifdef USE_THREADS
+#ifdef USE_5005THREADS
MUTEX_LOCK(&PL_eval_mutex);
if (PL_eval_owner && PL_eval_owner != thr)
while (PL_eval_owner)
COND_WAIT(&PL_eval_cond, &PL_eval_mutex);
PL_eval_owner = thr;
MUTEX_UNLOCK(&PL_eval_mutex);
-#endif /* USE_THREADS */
+#endif /* USE_5005THREADS */
ret = doeval(gimme, NULL);
if (PERLDB_INTER && was != PL_sub_generation /* Some subs defined here. */
&& ret != PL_op->op_next) { /* Successive compilation. */
PP(pp_leaveeval)
{
- djSP;
+ dSP;
register SV **mark;
SV **newsp;
PMOP *newpm;
}
PL_curpm = newpm; /* Don't pop $1 et al till now */
- if (AvFILLp(PL_comppad_name) >= 0)
- free_closures();
-
#ifdef DEBUGGING
assert(CvDEPTH(PL_compcv) == 1);
#endif
PP(pp_entertry)
{
- djSP;
+ dSP;
register PERL_CONTEXT *cx;
I32 gimme = GIMME_V;
push_return(cLOGOP->op_other->op_next);
PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), SP);
PUSHEVAL(cx, 0, 0);
- PL_eval_root = PL_op; /* Only needed so that goto works right. */
PL_in_eval = EVAL_INEVAL;
sv_setpv(ERRSV,"");
PP(pp_leavetry)
{
- djSP;
+ dSP;
register SV **mark;
SV **newsp;
PMOP *newpm;
STRLEN len;
register char *s = SvPV_force(sv, len);
register char *send = s + len;
- register char *base;
+ register char *base = Nullch;
register I32 skipspaces = 0;
- bool noblank;
- bool repeat;
+ bool noblank = FALSE;
+ bool repeat = FALSE;
bool postspace = FALSE;
U16 *fops;
register U16 *fpc;
- U16 *linepc;
+ U16 *linepc = 0;
register I32 arg;
bool ischop;
if (len == 0)
Perl_croak(aTHX_ "Null picture in formline");
-
+
New(804, fops, (send - s)*3+10, U16); /* Almost certainly too long... */
fpc = fops;
case ' ': case '\t':
skipspaces++;
continue;
-
+
case '\n': case 0:
arg = s - base;
skipspaces++;
}
*fpc++ = s - base; /* fieldsize for FETCH */
*fpc++ = FF_DECIMAL;
+ *fpc++ = arg;
+ }
+ else if (*s == '0' && s[1] == '#') { /* Zero padded decimals */
+ arg = ischop ? 512 : 0;
+ base = s - 1;
+ s++; /* skip the '0' first */
+ while (*s == '#')
+ s++;
+ if (*s == '.') {
+ char *f;
+ s++;
+ f = s;
+ while (*s == '#')
+ s++;
+ arg |= 256 + (s - f);
+ }
+ *fpc++ = s - base; /* fieldsize for FETCH */
+ *fpc++ = FF_0DECIMAL;
*fpc++ = arg;
}
else {
}
Copy(fops, s, arg, U16);
Safefree(fops);
- sv_magic(sv, Nullsv, 'f', Nullch, 0);
+ sv_magic(sv, Nullsv, PERL_MAGIC_fm, Nullch, 0);
SvCOMPILED_on(sv);
}
/*
- * The rest of this file was derived from source code contributed
- * by Tom Horsley.
+ * The mergesort implementation is by Peter M. Mcilroy <pmcilroy@lucent.com>.
+ *
+ * The original code was written in conjunction with BSD Computer Software
+ * Research Group at University of California, Berkeley.
+ *
+ * See also: "Optimistic Merge Sort" (SODA '92)
+ *
+ * The integration to Perl is by John P. Linderman <jpl@research.att.com>.
+ *
+ * The code can be distributed under the same terms as Perl itself.
*
- * NOTE: this code was derived from Tom Horsley's qsort replacement
- * and should not be confused with the original code.
*/
-/* Copyright (C) Tom Horsley, 1997. All rights reserved.
-
- Permission granted to distribute under the same terms as perl which are
- (briefly):
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of either:
-
- a) the GNU General Public License as published by the Free
- Software Foundation; either version 1, or (at your option) any
- later version, or
-
- b) the "Artistic License" which comes with this Kit.
-
- Details on the perl license can be found in the perl source code which
- may be located via the www.perl.com web page.
-
- This is the most wonderfulest possible qsort I can come up with (and
- still be mostly portable) My (limited) tests indicate it consistently
- does about 20% fewer calls to compare than does the qsort in the Visual
- C++ library, other vendors may vary.
+#ifdef TESTHARNESS
+#include <sys/types.h>
+typedef void SV;
+#define pTHX_
+#define STATIC
+#define New(ID,VAR,N,TYPE) VAR=(TYPE *)malloc((N)*sizeof(TYPE))
+#define Safefree(VAR) free(VAR)
+typedef int (*SVCOMPARE_t) (pTHX_ SV*, SV*);
+#endif /* TESTHARNESS */
+
+typedef char * aptr; /* pointer for arithmetic on sizes */
+typedef SV * gptr; /* pointers in our lists */
+
+/* Binary merge internal sort, with a few special mods
+** for the special perl environment it now finds itself in.
+**
+** Things that were once options have been hotwired
+** to values suitable for this use. In particular, we'll always
+** initialize looking for natural runs, we'll always produce stable
+** output, and we'll always do Peter McIlroy's binary merge.
+*/
- Some of the ideas in here can be found in "Algorithms" by Sedgewick,
- others I invented myself (or more likely re-invented since they seemed
- pretty obvious once I watched the algorithm operate for a while).
+/* Pointer types for arithmetic and storage and convenience casts */
- Most of this code was written while watching the Marlins sweep the Giants
- in the 1997 National League Playoffs - no Braves fans allowed to use this
- code (just kidding :-).
+#define APTR(P) ((aptr)(P))
+#define GPTP(P) ((gptr *)(P))
+#define GPPP(P) ((gptr **)(P))
- I realize that if I wanted to be true to the perl tradition, the only
- comment in this file would be something like:
- ...they shuffled back towards the rear of the line. 'No, not at the
- rear!' the slave-driver shouted. 'Three files up. And stay there...
+/* byte offset from pointer P to (larger) pointer Q */
+#define BYTEOFF(P, Q) (APTR(Q) - APTR(P))
- However, I really needed to violate that tradition just so I could keep
- track of what happens myself, not to mention some poor fool trying to
- understand this years from now :-).
-*/
+#define PSIZE sizeof(gptr)
-/* ********************************************************** Configuration */
+/* If PSIZE is power of 2, make PSHIFT that power, if that helps */
-#ifndef QSORT_ORDER_GUESS
-#define QSORT_ORDER_GUESS 2 /* Select doubling version of the netBSD trick */
+#ifdef PSHIFT
+#define PNELEM(P, Q) (BYTEOFF(P,Q) >> (PSHIFT))
+#define PNBYTE(N) ((N) << (PSHIFT))
+#define PINDEX(P, N) (GPTP(APTR(P) + PNBYTE(N)))
+#else
+/* Leave optimization to compiler */
+#define PNELEM(P, Q) (GPTP(Q) - GPTP(P))
+#define PNBYTE(N) ((N) * (PSIZE))
+#define PINDEX(P, N) (GPTP(P) + (N))
#endif
-/* QSORT_MAX_STACK is the largest number of partitions that can be stacked up for
- future processing - a good max upper bound is log base 2 of memory size
- (32 on 32 bit machines, 64 on 64 bit machines, etc). In reality can
- safely be smaller than that since the program is taking up some space and
- most operating systems only let you grab some subset of contiguous
- memory (not to mention that you are normally sorting data larger than
- 1 byte element size :-).
-*/
-#ifndef QSORT_MAX_STACK
-#define QSORT_MAX_STACK 32
-#endif
+/* Pointer into other corresponding to pointer into this */
+#define POTHER(P, THIS, OTHER) GPTP(APTR(OTHER) + BYTEOFF(THIS,P))
-/* QSORT_BREAK_EVEN is the size of the largest partition we should insertion sort.
- Anything bigger and we use qsort. If you make this too small, the qsort
- will probably break (or become less efficient), because it doesn't expect
- the middle element of a partition to be the same as the right or left -
- you have been warned).
-*/
-#ifndef QSORT_BREAK_EVEN
-#define QSORT_BREAK_EVEN 6
-#endif
+#define FROMTOUPTO(src, dst, lim) do *dst++ = *src++; while(src<lim)
-/* ************************************************************* Data Types */
-/* hold left and right index values of a partition waiting to be sorted (the
- partition includes both left and right - right is NOT one past the end or
- anything like that).
+/* Runs are identified by a pointer in the auxilliary list.
+** The pointer is at the start of the list,
+** and it points to the start of the next list.
+** NEXT is used as an lvalue, too.
*/
-struct partition_stack_entry {
- int left;
- int right;
-#ifdef QSORT_ORDER_GUESS
- int qsort_break_even;
-#endif
-};
-
-/* ******************************************************* Shorthand Macros */
-/* Note that these macros will be used from inside the qsort function where
- we happen to know that the variable 'elt_size' contains the size of an
- array element and the variable 'temp' points to enough space to hold a
- temp element and the variable 'array' points to the array being sorted
- and 'compare' is the pointer to the compare routine.
+#define NEXT(P) (*GPPP(P))
- Also note that there are very many highly architecture specific ways
- these might be sped up, but this is simply the most generally portable
- code I could think of.
-*/
-/* Return < 0 == 0 or > 0 as the value of elt1 is < elt2, == elt2, > elt2
+/* PTHRESH is the minimum number of pairs with the same sense to justify
+** checking for a run and extending it. Note that PTHRESH counts PAIRS,
+** not just elements, so PTHRESH == 8 means a run of 16.
*/
-#define qsort_cmp(elt1, elt2) \
- ((*compare)(aTHXo_ array[elt1], array[elt2]))
-#ifdef QSORT_ORDER_GUESS
-#define QSORT_NOTICE_SWAP swapped++;
-#else
-#define QSORT_NOTICE_SWAP
-#endif
+#define PTHRESH (8)
-/* swaps contents of array elements elt1, elt2.
+/* RTHRESH is the number of elements in a run that must compare low
+** to the low element from the opposing run before we justify
+** doing a binary rampup instead of single stepping.
+** In random input, N in a row low should only happen with
+** probability 2^(1-N), so we can risk that we are dealing
+** with orderly input without paying much when we aren't.
*/
-#define qsort_swap(elt1, elt2) \
- STMT_START { \
- QSORT_NOTICE_SWAP \
- temp = array[elt1]; \
- array[elt1] = array[elt2]; \
- array[elt2] = temp; \
- } STMT_END
-
-/* rotate contents of elt1, elt2, elt3 such that elt1 gets elt2, elt2 gets
- elt3 and elt3 gets elt1.
-*/
-#define qsort_rotate(elt1, elt2, elt3) \
- STMT_START { \
- QSORT_NOTICE_SWAP \
- temp = array[elt1]; \
- array[elt1] = array[elt2]; \
- array[elt2] = array[elt3]; \
- array[elt3] = temp; \
- } STMT_END
-/* ************************************************************ Debug stuff */
+#define RTHRESH (6)
-#ifdef QSORT_DEBUG
-static void
-break_here()
-{
- return; /* good place to set a breakpoint */
-}
+/*
+** Overview of algorithm and variables.
+** The array of elements at list1 will be organized into runs of length 2,
+** or runs of length >= 2 * PTHRESH. We only try to form long runs when
+** PTHRESH adjacent pairs compare in the same way, suggesting overall order.
+**
+** Unless otherwise specified, pair pointers address the first of two elements.
+**
+** b and b+1 are a pair that compare with sense ``sense''.
+** b is the ``bottom'' of adjacent pairs that might form a longer run.
+**
+** p2 parallels b in the list2 array, where runs are defined by
+** a pointer chain.
+**
+** t represents the ``top'' of the adjacent pairs that might extend
+** the run beginning at b. Usually, t addresses a pair
+** that compares with opposite sense from (b,b+1).
+** However, it may also address a singleton element at the end of list1,
+** or it may be equal to ``last'', the first element beyond list1.
+**
+** r addresses the Nth pair following b. If this would be beyond t,
+** we back it off to t. Only when r is less than t do we consider the
+** run long enough to consider checking.
+**
+** q addresses a pair such that the pairs at b through q already form a run.
+** Often, q will equal b, indicating we only are sure of the pair itself.
+** However, a search on the previous cycle may have revealed a longer run,
+** so q may be greater than b.
+**
+** p is used to work back from a candidate r, trying to reach q,
+** which would mean b through r would be a run. If we discover such a run,
+** we start q at r and try to push it further towards t.
+** If b through r is NOT a run, we detect the wrong order at (p-1,p).
+** In any event, after the check (if any), we have two main cases.
+**
+** 1) Short run. b <= q < p <= r <= t.
+** b through q is a run (perhaps trivial)
+** q through p are uninteresting pairs
+** p through r is a run
+**
+** 2) Long run. b < r <= q < t.
+** b through q is a run (of length >= 2 * PTHRESH)
+**
+** Note that degenerate cases are not only possible, but likely.
+** For example, if the pair following b compares with opposite sense,
+** then b == q < p == r == t.
+*/
-#define qsort_assert(t) (void)( (t) || (break_here(), 0) )
static void
-doqsort_all_asserts(
- void * array,
- size_t num_elts,
- size_t elt_size,
- int (*compare)(const void * elt1, const void * elt2),
- int pc_left, int pc_right, int u_left, int u_right)
+dynprep(pTHX_ gptr *list1, gptr *list2, size_t nmemb, SVCOMPARE_t cmp)
{
- int i;
-
- qsort_assert(pc_left <= pc_right);
- qsort_assert(u_right < pc_left);
- qsort_assert(pc_right < u_left);
- for (i = u_right + 1; i < pc_left; ++i) {
- qsort_assert(qsort_cmp(i, pc_left) < 0);
- }
- for (i = pc_left; i < pc_right; ++i) {
- qsort_assert(qsort_cmp(i, pc_right) == 0);
- }
- for (i = pc_right + 1; i < u_left; ++i) {
- qsort_assert(qsort_cmp(pc_right, i) < 0);
- }
+ int sense;
+ register gptr *b, *p, *q, *t, *p2;
+ register gptr c, *last, *r;
+ gptr *savep;
+
+ b = list1;
+ last = PINDEX(b, nmemb);
+ sense = (cmp(aTHX_ *b, *(b+1)) > 0);
+ for (p2 = list2; b < last; ) {
+ /* We just started, or just reversed sense.
+ ** Set t at end of pairs with the prevailing sense.
+ */
+ for (p = b+2, t = p; ++p < last; t = ++p) {
+ if ((cmp(aTHX_ *t, *p) > 0) != sense) break;
+ }
+ q = b;
+ /* Having laid out the playing field, look for long runs */
+ do {
+ p = r = b + (2 * PTHRESH);
+ if (r >= t) p = r = t; /* too short to care about */
+ else {
+ while (((cmp(aTHX_ *(p-1), *p) > 0) == sense) &&
+ ((p -= 2) > q));
+ if (p <= q) {
+ /* b through r is a (long) run.
+ ** Extend it as far as possible.
+ */
+ p = q = r;
+ while (((p += 2) < t) &&
+ ((cmp(aTHX_ *(p-1), *p) > 0) == sense)) q = p;
+ r = p = q + 2; /* no simple pairs, no after-run */
+ }
+ }
+ if (q > b) { /* run of greater than 2 at b */
+ savep = p;
+ p = q += 2;
+ /* pick up singleton, if possible */
+ if ((p == t) &&
+ ((t + 1) == last) &&
+ ((cmp(aTHX_ *(p-1), *p) > 0) == sense))
+ savep = r = p = q = last;
+ p2 = NEXT(p2) = p2 + (p - b);
+ if (sense) while (b < --p) {
+ c = *b;
+ *b++ = *p;
+ *p = c;
+ }
+ p = savep;
+ }
+ while (q < p) { /* simple pairs */
+ p2 = NEXT(p2) = p2 + 2;
+ if (sense) {
+ c = *q++;
+ *(q-1) = *q;
+ *q++ = c;
+ } else q += 2;
+ }
+ if (((b = p) == t) && ((t+1) == last)) {
+ NEXT(p2) = p2 + 1;
+ b++;
+ }
+ q = r;
+ } while (b < t);
+ sense = !sense;
+ }
+ return;
}
-#define qsort_all_asserts(PC_LEFT, PC_RIGHT, U_LEFT, U_RIGHT) \
- doqsort_all_asserts(array, num_elts, elt_size, compare, \
- PC_LEFT, PC_RIGHT, U_LEFT, U_RIGHT)
-
-#else
-
-#define qsort_assert(t) ((void)0)
-#define qsort_all_asserts(PC_LEFT, PC_RIGHT, U_LEFT, U_RIGHT) ((void)0)
-
-#endif
-
-/* ****************************************************************** qsort */
+/* Overview of bmerge variables:
+**
+** list1 and list2 address the main and auxiliary arrays.
+** They swap identities after each merge pass.
+** Base points to the original list1, so we can tell if
+** the pointers ended up where they belonged (or must be copied).
+**
+** When we are merging two lists, f1 and f2 are the next elements
+** on the respective lists. l1 and l2 mark the end of the lists.
+** tp2 is the current location in the merged list.
+**
+** p1 records where f1 started.
+** After the merge, a new descriptor is built there.
+**
+** p2 is a ``parallel'' pointer in (what starts as) descriptor space.
+** It is used to identify and delimit the runs.
+**
+** In the heat of determining where q, the greater of the f1/f2 elements,
+** belongs in the other list, b, t and p, represent bottom, top and probe
+** locations, respectively, in the other list.
+** They make convenient temporary pointers in other places.
+*/
STATIC void
-S_qsortsv(pTHX_ SV ** array, size_t num_elts, SVCOMPARE_t compare)
+S_qsortsv(pTHX_ gptr *list1, size_t nmemb, SVCOMPARE_t cmp)
{
- register SV * temp;
+ int i, run;
+ int sense;
+ register gptr *f1, *f2, *t, *b, *p, *tp2, *l1, *l2, *q;
+ gptr *aux, *list2, *p2, *last;
+ gptr *base = list1;
+ gptr *p1;
+
+ if (nmemb <= 1) return; /* sorted trivially */
+ New(799,list2,nmemb,gptr); /* allocate auxilliary array */
+ aux = list2;
+ dynprep(aTHX_ list1, list2, nmemb, cmp);
+ last = PINDEX(list2, nmemb);
+ while (NEXT(list2) != last) {
+ /* More than one run remains. Do some merging to reduce runs. */
+ l2 = p1 = list1;
+ for (tp2 = p2 = list2; p2 != last;) {
+ /* The new first run begins where the old second list ended.
+ ** Use the p2 ``parallel'' pointer to identify the end of the run.
+ */
+ f1 = l2;
+ t = NEXT(p2);
+ f2 = l1 = POTHER(t, list2, list1);
+ if (t != last) t = NEXT(t);
+ l2 = POTHER(t, list2, list1);
+ p2 = t;
+ while (f1 < l1 && f2 < l2) {
+ /* If head 1 is larger than head 2, find ALL the elements
+ ** in list 2 strictly less than head1, write them all,
+ ** then head 1. Then compare the new heads, and repeat,
+ ** until one or both lists are exhausted.
+ **
+ ** In all comparisons (after establishing
+ ** which head to merge) the item to merge
+ ** (at pointer q) is the first operand of
+ ** the comparison. When we want to know
+ ** if ``q is strictly less than the other'',
+ ** we can't just do
+ ** cmp(q, other) < 0
+ ** because stability demands that we treat equality
+ ** as high when q comes from l2, and as low when
+ ** q was from l1. So we ask the question by doing
+ ** cmp(q, other) <= sense
+ ** and make sense == 0 when equality should look low,
+ ** and -1 when equality should look high.
+ */
+
+
+ if (cmp(aTHX_ *f1, *f2) <= 0) {
+ q = f2; b = f1; t = l1;
+ sense = -1;
+ } else {
+ q = f1; b = f2; t = l2;
+ sense = 0;
+ }
- struct partition_stack_entry partition_stack[QSORT_MAX_STACK];
- int next_stack_entry = 0;
- int part_left;
- int part_right;
-#ifdef QSORT_ORDER_GUESS
- int qsort_break_even;
- int swapped;
-#endif
+ /* ramp up
+ **
+ ** Leave t at something strictly
+ ** greater than q (or at the end of the list),
+ ** and b at something strictly less than q.
+ */
+ for (i = 1, run = 0 ;;) {
+ if ((p = PINDEX(b, i)) >= t) {
+ /* off the end */
+ if (((p = PINDEX(t, -1)) > b) &&
+ (cmp(aTHX_ *q, *p) <= sense))
+ t = p;
+ else b = p;
+ break;
+ } else if (cmp(aTHX_ *q, *p) <= sense) {
+ t = p;
+ break;
+ } else b = p;
+ if (++run >= RTHRESH) i += i;
+ }
- /* Make sure we actually have work to do.
- */
- if (num_elts <= 1) {
- return;
- }
-
- /* Setup the initial partition definition and fall into the sorting loop
- */
- part_left = 0;
- part_right = (int)(num_elts - 1);
-#ifdef QSORT_ORDER_GUESS
- qsort_break_even = QSORT_BREAK_EVEN;
-#else
-#define qsort_break_even QSORT_BREAK_EVEN
-#endif
- for ( ; ; ) {
- if ((part_right - part_left) >= qsort_break_even) {
- /* OK, this is gonna get hairy, so lets try to document all the
- concepts and abbreviations and variables and what they keep
- track of:
-
- pc: pivot chunk - the set of array elements we accumulate in the
- middle of the partition, all equal in value to the original
- pivot element selected. The pc is defined by:
-
- pc_left - the leftmost array index of the pc
- pc_right - the rightmost array index of the pc
-
- we start with pc_left == pc_right and only one element
- in the pivot chunk (but it can grow during the scan).
-
- u: uncompared elements - the set of elements in the partition
- we have not yet compared to the pivot value. There are two
- uncompared sets during the scan - one to the left of the pc
- and one to the right.
-
- u_right - the rightmost index of the left side's uncompared set
- u_left - the leftmost index of the right side's uncompared set
-
- The leftmost index of the left sides's uncompared set
- doesn't need its own variable because it is always defined
- by the leftmost edge of the whole partition (part_left). The
- same goes for the rightmost edge of the right partition
- (part_right).
-
- We know there are no uncompared elements on the left once we
- get u_right < part_left and no uncompared elements on the
- right once u_left > part_right. When both these conditions
- are met, we have completed the scan of the partition.
-
- Any elements which are between the pivot chunk and the
- uncompared elements should be less than the pivot value on
- the left side and greater than the pivot value on the right
- side (in fact, the goal of the whole algorithm is to arrange
- for that to be true and make the groups of less-than and
- greater-then elements into new partitions to sort again).
-
- As you marvel at the complexity of the code and wonder why it
- has to be so confusing. Consider some of the things this level
- of confusion brings:
-
- Once I do a compare, I squeeze every ounce of juice out of it. I
- never do compare calls I don't have to do, and I certainly never
- do redundant calls.
-
- I also never swap any elements unless I can prove there is a
- good reason. Many sort algorithms will swap a known value with
- an uncompared value just to get things in the right place (or
- avoid complexity :-), but that uncompared value, once it gets
- compared, may then have to be swapped again. A lot of the
- complexity of this code is due to the fact that it never swaps
- anything except compared values, and it only swaps them when the
- compare shows they are out of position.
- */
- int pc_left, pc_right;
- int u_right, u_left;
-
- int s;
-
- pc_left = ((part_left + part_right) / 2);
- pc_right = pc_left;
- u_right = pc_left - 1;
- u_left = pc_right + 1;
-
- /* Qsort works best when the pivot value is also the median value
- in the partition (unfortunately you can't find the median value
- without first sorting :-), so to give the algorithm a helping
- hand, we pick 3 elements and sort them and use the median value
- of that tiny set as the pivot value.
-
- Some versions of qsort like to use the left middle and right as
- the 3 elements to sort so they can insure the ends of the
- partition will contain values which will stop the scan in the
- compare loop, but when you have to call an arbitrarily complex
- routine to do a compare, its really better to just keep track of
- array index values to know when you hit the edge of the
- partition and avoid the extra compare. An even better reason to
- avoid using a compare call is the fact that you can drop off the
- edge of the array if someone foolishly provides you with an
- unstable compare function that doesn't always provide consistent
- results.
-
- So, since it is simpler for us to compare the three adjacent
- elements in the middle of the partition, those are the ones we
- pick here (conveniently pointed at by u_right, pc_left, and
- u_left). The values of the left, center, and right elements
- are refered to as l c and r in the following comments.
- */
-
-#ifdef QSORT_ORDER_GUESS
- swapped = 0;
-#endif
- s = qsort_cmp(u_right, pc_left);
- if (s < 0) {
- /* l < c */
- s = qsort_cmp(pc_left, u_left);
- /* if l < c, c < r - already in order - nothing to do */
- if (s == 0) {
- /* l < c, c == r - already in order, pc grows */
- ++pc_right;
- qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
- } else if (s > 0) {
- /* l < c, c > r - need to know more */
- s = qsort_cmp(u_right, u_left);
- if (s < 0) {
- /* l < c, c > r, l < r - swap c & r to get ordered */
- qsort_swap(pc_left, u_left);
- qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
- } else if (s == 0) {
- /* l < c, c > r, l == r - swap c&r, grow pc */
- qsort_swap(pc_left, u_left);
- --pc_left;
- qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
- } else {
- /* l < c, c > r, l > r - make lcr into rlc to get ordered */
- qsort_rotate(pc_left, u_right, u_left);
- qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
- }
- }
- } else if (s == 0) {
- /* l == c */
- s = qsort_cmp(pc_left, u_left);
- if (s < 0) {
- /* l == c, c < r - already in order, grow pc */
- --pc_left;
- qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
- } else if (s == 0) {
- /* l == c, c == r - already in order, grow pc both ways */
- --pc_left;
- ++pc_right;
- qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
- } else {
- /* l == c, c > r - swap l & r, grow pc */
- qsort_swap(u_right, u_left);
- ++pc_right;
- qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
- }
- } else {
- /* l > c */
- s = qsort_cmp(pc_left, u_left);
- if (s < 0) {
- /* l > c, c < r - need to know more */
- s = qsort_cmp(u_right, u_left);
- if (s < 0) {
- /* l > c, c < r, l < r - swap l & c to get ordered */
- qsort_swap(u_right, pc_left);
- qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
- } else if (s == 0) {
- /* l > c, c < r, l == r - swap l & c, grow pc */
- qsort_swap(u_right, pc_left);
- ++pc_right;
- qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
- } else {
- /* l > c, c < r, l > r - rotate lcr into crl to order */
- qsort_rotate(u_right, pc_left, u_left);
- qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
- }
- } else if (s == 0) {
- /* l > c, c == r - swap ends, grow pc */
- qsort_swap(u_right, u_left);
- --pc_left;
- qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
- } else {
- /* l > c, c > r - swap ends to get in order */
- qsort_swap(u_right, u_left);
- qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
- }
- }
- /* We now know the 3 middle elements have been compared and
- arranged in the desired order, so we can shrink the uncompared
- sets on both sides
- */
- --u_right;
- ++u_left;
- qsort_all_asserts(pc_left, pc_right, u_left, u_right);
-
- /* The above massive nested if was the simple part :-). We now have
- the middle 3 elements ordered and we need to scan through the
- uncompared sets on either side, swapping elements that are on
- the wrong side or simply shuffling equal elements around to get
- all equal elements into the pivot chunk.
- */
-
- for ( ; ; ) {
- int still_work_on_left;
- int still_work_on_right;
-
- /* Scan the uncompared values on the left. If I find a value
- equal to the pivot value, move it over so it is adjacent to
- the pivot chunk and expand the pivot chunk. If I find a value
- less than the pivot value, then just leave it - its already
- 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))) {
- s = qsort_cmp(u_right, pc_left);
- if (s < 0) {
- --u_right;
- } else if (s == 0) {
- --pc_left;
- if (pc_left != u_right) {
- qsort_swap(u_right, pc_left);
- }
- --u_right;
- } else {
- break;
- }
- qsort_assert(u_right < pc_left);
- qsort_assert(pc_left <= pc_right);
- qsort_assert(qsort_cmp(u_right + 1, pc_left) <= 0);
- qsort_assert(qsort_cmp(pc_left, pc_right) == 0);
- }
- /* Do a mirror image scan of uncompared values on the right
- */
- while ((still_work_on_right = (u_left <= part_right))) {
- s = qsort_cmp(pc_right, u_left);
- if (s < 0) {
- ++u_left;
- } else if (s == 0) {
- ++pc_right;
- if (pc_right != u_left) {
- qsort_swap(pc_right, u_left);
- }
- ++u_left;
- } else {
- break;
- }
- qsort_assert(u_left > pc_right);
- qsort_assert(pc_left <= pc_right);
- qsort_assert(qsort_cmp(pc_right, u_left - 1) <= 0);
- qsort_assert(qsort_cmp(pc_left, pc_right) == 0);
- }
+ /* q is known to follow b and must be inserted before t.
+ ** Increment b, so the range of possibilities is [b,t).
+ ** Round binary split down, to favor early appearance.
+ ** Adjust b and t until q belongs just before t.
+ */
- if (still_work_on_left) {
- /* I know I have a value on the left side which needs to be
- on the right side, but I need to know more to decide
- exactly the best thing to do with it.
- */
- if (still_work_on_right) {
- /* I know I have values on both side which are out of
- position. This is a big win because I kill two birds
- with one swap (so to speak). I can advance the
- uncompared pointers on both sides after swapping both
- of them into the right place.
- */
- qsort_swap(u_right, u_left);
- --u_right;
- ++u_left;
- qsort_all_asserts(pc_left, pc_right, u_left, u_right);
- } else {
- /* I have an out of position value on the left, but the
- right is fully scanned, so I "slide" the pivot chunk
- and any less-than values left one to make room for the
- greater value over on the right. If the out of position
- value is immediately adjacent to the pivot chunk (there
- are no less-than values), I can do that with a swap,
- otherwise, I have to rotate one of the less than values
- into the former position of the out of position value
- and the right end of the pivot chunk into the left end
- (got all that?).
- */
- --pc_left;
- if (pc_left == u_right) {
- qsort_swap(u_right, pc_right);
- qsort_all_asserts(pc_left, pc_right-1, u_left, u_right-1);
- } else {
- qsort_rotate(u_right, pc_left, pc_right);
- qsort_all_asserts(pc_left, pc_right-1, u_left, u_right-1);
- }
- --pc_right;
- --u_right;
- }
- } else if (still_work_on_right) {
- /* Mirror image of complex case above: I have an out of
- position value on the right, but the left is fully
- scanned, so I need to shuffle things around to make room
- for the right value on the left.
- */
- ++pc_right;
- if (pc_right == u_left) {
- qsort_swap(u_left, pc_left);
- qsort_all_asserts(pc_left+1, pc_right, u_left+1, u_right);
- } else {
- qsort_rotate(pc_right, pc_left, u_left);
- qsort_all_asserts(pc_left+1, pc_right, u_left+1, u_right);
- }
- ++pc_left;
- ++u_left;
- } else {
- /* No more scanning required on either side of partition,
- break out of loop and figure out next set of partitions
- */
- break;
- }
- }
-
- /* The elements in the pivot chunk are now in the right place. They
- will never move or be compared again. All I have to do is decide
- what to do with the stuff to the left and right of the pivot
- chunk.
-
- Notes on the QSORT_ORDER_GUESS ifdef code:
-
- 1. If I just built these partitions without swapping any (or
- very many) elements, there is a chance that the elements are
- already ordered properly (being properly ordered will
- certainly result in no swapping, but the converse can't be
- proved :-).
-
- 2. A (properly written) insertion sort will run faster on
- already ordered data than qsort will.
-
- 3. Perhaps there is some way to make a good guess about
- switching to an insertion sort earlier than partition size 6
- (for instance - we could save the partition size on the stack
- and increase the size each time we find we didn't swap, thus
- switching to insertion sort earlier for partitions with a
- history of not swapping).
-
- 4. Naturally, if I just switch right away, it will make
- artificial benchmarks with pure ascending (or descending)
- data look really good, but is that a good reason in general?
- Hard to say...
- */
-
-#ifdef QSORT_ORDER_GUESS
- if (swapped < 3) {
-#if QSORT_ORDER_GUESS == 1
- qsort_break_even = (part_right - part_left) + 1;
-#endif
-#if QSORT_ORDER_GUESS == 2
- qsort_break_even *= 2;
-#endif
-#if QSORT_ORDER_GUESS == 3
- int prev_break = qsort_break_even;
- qsort_break_even *= qsort_break_even;
- if (qsort_break_even < prev_break) {
- qsort_break_even = (part_right - part_left) + 1;
- }
-#endif
- } else {
- qsort_break_even = QSORT_BREAK_EVEN;
- }
-#endif
+ b++;
+ while (b < t) {
+ p = PINDEX(b, (PNELEM(b, t) - 1) / 2);
+ if (cmp(aTHX_ *q, *p) <= sense) {
+ t = p;
+ } else b = p + 1;
+ }
- if (part_left < pc_left) {
- /* There are elements on the left which need more processing.
- Check the right as well before deciding what to do.
- */
- if (pc_right < part_right) {
- /* We have two partitions to be sorted. Stack the biggest one
- and process the smallest one on the next iteration. This
- minimizes the stack height by insuring that any additional
- stack entries must come from the smallest partition which
- (because it is smallest) will have the fewest
- opportunities to generate additional stack entries.
- */
- if ((part_right - pc_right) > (pc_left - part_left)) {
- /* stack the right partition, process the left */
- partition_stack[next_stack_entry].left = pc_right + 1;
- partition_stack[next_stack_entry].right = part_right;
-#ifdef QSORT_ORDER_GUESS
- partition_stack[next_stack_entry].qsort_break_even = qsort_break_even;
-#endif
- part_right = pc_left - 1;
- } else {
- /* stack the left partition, process the right */
- partition_stack[next_stack_entry].left = part_left;
- partition_stack[next_stack_entry].right = pc_left - 1;
-#ifdef QSORT_ORDER_GUESS
- partition_stack[next_stack_entry].qsort_break_even = qsort_break_even;
-#endif
- part_left = pc_right + 1;
- }
- qsort_assert(next_stack_entry < QSORT_MAX_STACK);
- ++next_stack_entry;
- } else {
- /* The elements on the left are the only remaining elements
- that need sorting, arrange for them to be processed as the
- next partition.
- */
- part_right = pc_left - 1;
- }
- } else if (pc_right < part_right) {
- /* There is only one chunk on the right to be sorted, make it
- the new partition and loop back around.
- */
- part_left = pc_right + 1;
- } else {
- /* This whole partition wound up in the pivot chunk, so
- we need to get a new partition off the stack.
- */
- if (next_stack_entry == 0) {
- /* the stack is empty - we are done */
- break;
- }
- --next_stack_entry;
- part_left = partition_stack[next_stack_entry].left;
- part_right = partition_stack[next_stack_entry].right;
-#ifdef QSORT_ORDER_GUESS
- qsort_break_even = partition_stack[next_stack_entry].qsort_break_even;
-#endif
- }
- } else {
- /* This partition is too small to fool with qsort complexity, just
- do an ordinary insertion sort to minimize overhead.
- */
- int i;
- /* Assume 1st element is in right place already, and start checking
- at 2nd element to see where it should be inserted.
- */
- for (i = part_left + 1; i <= part_right; ++i) {
- int j;
- /* Scan (backwards - just in case 'i' is already in right place)
- through the elements already sorted to see if the ith element
- belongs ahead of one of them.
- */
- for (j = i - 1; j >= part_left; --j) {
- if (qsort_cmp(i, j) >= 0) {
- /* i belongs right after j
- */
- break;
- }
- }
- ++j;
- if (j != i) {
- /* Looks like we really need to move some things
- */
- int k;
- temp = array[i];
- for (k = i - 1; k >= j; --k)
- array[k + 1] = array[k];
- array[j] = temp;
- }
- }
-
- /* That partition is now sorted, grab the next one, or get out
- of the loop if there aren't any more.
- */
-
- if (next_stack_entry == 0) {
- /* the stack is empty - we are done */
- break;
- }
- --next_stack_entry;
- part_left = partition_stack[next_stack_entry].left;
- part_right = partition_stack[next_stack_entry].right;
-#ifdef QSORT_ORDER_GUESS
- qsort_break_even = partition_stack[next_stack_entry].qsort_break_even;
-#endif
- }
- }
- /* Believe it or not, the array is sorted at this point! */
-}
+ /* Copy all the strictly low elements */
+ if (q == f1) {
+ FROMTOUPTO(f2, tp2, t);
+ *tp2++ = *f1++;
+ } else {
+ FROMTOUPTO(f1, tp2, t);
+ *tp2++ = *f2++;
+ }
+ }
-#ifdef PERL_OBJECT
-#undef this
-#define this pPerl
-#include "XSUB.h"
-#endif
+ /* Run out remaining list */
+ if (f1 == l1) {
+ if (f2 < l2) FROMTOUPTO(f2, tp2, l2);
+ } else FROMTOUPTO(f1, tp2, l1);
+ p1 = NEXT(p1) = POTHER(tp2, list2, list1);
+ }
+ t = list1;
+ list1 = list2;
+ list2 = t;
+ last = PINDEX(list2, nmemb);
+ }
+ if (base == list2) {
+ last = PINDEX(list1, nmemb);
+ FROMTOUPTO(list1, list2, last);
+ }
+ Safefree(aux);
+ return;
+}
static I32
-sortcv(pTHXo_ SV *a, SV *b)
+sortcv(pTHX_ SV *a, SV *b)
{
- dTHR;
I32 oldsaveix = PL_savestack_ix;
I32 oldscopeix = PL_scopestack_ix;
I32 result;
}
static I32
-sortcv_stacked(pTHXo_ SV *a, SV *b)
+sortcv_stacked(pTHX_ SV *a, SV *b)
{
- dTHR;
I32 oldsaveix = PL_savestack_ix;
I32 oldscopeix = PL_scopestack_ix;
I32 result;
AV *av;
-#ifdef USE_THREADS
+#ifdef USE_5005THREADS
av = (AV*)PL_curpad[0];
#else
av = GvAV(PL_defgv);
}
static I32
-sortcv_xsub(pTHXo_ SV *a, SV *b)
+sortcv_xsub(pTHX_ SV *a, SV *b)
{
dSP;
I32 oldsaveix = PL_savestack_ix;
*++SP = a;
*++SP = b;
PUTBACK;
- (void)(*CvXSUB(cv))(aTHXo_ cv);
+ (void)(*CvXSUB(cv))(aTHX_ cv);
if (PL_stack_sp != PL_stack_base + 1)
Perl_croak(aTHX_ "Sort subroutine didn't return single value");
if (!SvNIOKp(*PL_stack_sp))
static I32
-sv_ncmp(pTHXo_ SV *a, SV *b)
+sv_ncmp(pTHX_ SV *a, SV *b)
{
NV nv1 = SvNV(a);
NV nv2 = SvNV(b);
}
static I32
-sv_i_ncmp(pTHXo_ SV *a, SV *b)
+sv_i_ncmp(pTHX_ SV *a, SV *b)
{
IV iv1 = SvIV(a);
IV iv2 = SvIV(b);
} STMT_END
static I32
-amagic_ncmp(pTHXo_ register SV *a, register SV *b)
+amagic_ncmp(pTHX_ register SV *a, register SV *b)
{
SV *tmpsv;
tryCALL_AMAGICbin(a,b,ncmp,&tmpsv);
return 1;
return d? -1 : 0;
}
- return sv_ncmp(aTHXo_ a, b);
+ return sv_ncmp(aTHX_ a, b);
}
static I32
-amagic_i_ncmp(pTHXo_ register SV *a, register SV *b)
+amagic_i_ncmp(pTHX_ register SV *a, register SV *b)
{
SV *tmpsv;
tryCALL_AMAGICbin(a,b,ncmp,&tmpsv);
return 1;
return d? -1 : 0;
}
- return sv_i_ncmp(aTHXo_ a, b);
+ return sv_i_ncmp(aTHX_ a, b);
}
static I32
-amagic_cmp(pTHXo_ register SV *str1, register SV *str2)
+amagic_cmp(pTHX_ register SV *str1, register SV *str2)
{
SV *tmpsv;
tryCALL_AMAGICbin(str1,str2,scmp,&tmpsv);
}
static I32
-amagic_cmp_locale(pTHXo_ register SV *str1, register SV *str2)
+amagic_cmp_locale(pTHX_ register SV *str1, register SV *str2)
{
SV *tmpsv;
tryCALL_AMAGICbin(str1,str2,scmp,&tmpsv);
}
static I32
-run_user_filter(pTHXo_ int idx, SV *buf_sv, int maxlen)
+run_user_filter(pTHX_ int idx, SV *buf_sv, int maxlen)
{
SV *datasv = FILTER_DATA(idx);
int filter_has_file = IoLINES(datasv);
}
if (filter_sub && len >= 0) {
- djSP;
+ dSP;
int count;
ENTER;
return len;
}
-
-#ifdef PERL_OBJECT
-
-static I32
-sv_cmp_locale_static(pTHXo_ register SV *str1, register SV *str2)
-{
- return sv_cmp_locale(str1, str2);
-}
-
-static I32
-sv_cmp_static(pTHXo_ register SV *str1, register SV *str2)
-{
- return sv_cmp(str1, str2);
-}
-
-#endif /* PERL_OBJECT */