/* pp_sort.c
*
* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- * 2000, 2001, 2002, 2003, 2004, by Larry Wall and others
+ * 2000, 2001, 2002, 2003, 2004, 2005, by Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
* rear!' the slave-driver shouted. 'Three files up. And stay there...
*/
+/* This file contains pp ("push/pop") functions that
+ * execute the opcodes that make up a perl program. A typical pp function
+ * expects to find its arguments on the stack, and usually pushes its
+ * results onto the stack, hence the 'pp' terminology. Each OP structure
+ * contains a pointer to the relevant pp_foo() function.
+ *
+ * This particular file just contains pp_sort(), which is complex
+ * enough to merit its own file! See the other pp*.c files for the rest of
+ * the pp_ functions.
+ */
+
#include "EXTERN.h"
#define PERL_IN_PP_SORT_C
#include "perl.h"
gptr small[SMALLSORT];
gptr *which[3];
off_runs stack[60], *stackp;
- SVCOMPARE_t savecmp;
+ SVCOMPARE_t savecmp = 0;
if (nmemb <= 1) return; /* sorted trivially */
}
-void
+static void
S_sortsv_desc(pTHX_ SV **array, size_t nmemb, SVCOMPARE_t cmp)
{
void (*sortsvp)(pTHX_ SV **array, size_t nmemb, SVCOMPARE_t cmp, U32 flags)
PP(pp_sort)
{
- dSP; dMARK; dORIGMARK;
+ dVAR; dSP; dMARK; dORIGMARK;
register SV **p1 = ORIGMARK+1, **p2;
register I32 max, i;
AV* av = Nullav;
bool hasargs = FALSE;
I32 is_xsub = 0;
I32 sorting_av = 0;
+ U8 priv = PL_op->op_private;
+ U8 flags = PL_op->op_flags;
void (*sortsvp)(pTHX_ SV **array, size_t nmemb, SVCOMPARE_t cmp)
= Perl_sortsv;
ENTER;
SAVEVPTR(PL_sortcop);
- if (PL_op->op_flags & OPf_STACKED) {
- if (PL_op->op_flags & OPf_SPECIAL) {
+ if (flags & OPf_STACKED) {
+ if (flags & OPf_SPECIAL) {
OP *kid = cLISTOP->op_first->op_sibling; /* pass pushmark */
kid = kUNOP->op_first; /* pass rv2gv */
kid = kUNOP->op_first; /* pass leave */
/* optimiser converts "@a = sort @a" to "sort \@a";
* in case of tied @a, pessimise: push (@a) onto stack, then assign
* result back to @a at the end of this function */
- if (PL_op->op_private & OPpSORT_INPLACE) {
+ if (priv & OPpSORT_INPLACE) {
assert( MARK+1 == SP && *SP && SvTYPE(*SP) == SVt_PVAV);
(void)POPMARK; /* remove mark associated with ex-OP_AASSIGN */
av = (AV*)(*SP);
if (SvMAGICAL(av)) {
MEXTEND(SP, max);
p2 = SP;
- for (i=0; i < (U32)max; i++) {
+ for (i=0; i < max; i++) {
SV **svp = av_fetch(av, i, FALSE);
*SP++ = (svp) ? *svp : Nullsv;
}
max = SP - MARK;
}
- if (PL_op->op_private & OPpSORT_DESCEND) {
+ if (priv & OPpSORT_DESCEND) {
sortsvp = S_sortsv_desc;
}
AvFILLp(av) = max-1;
if (max > 1) {
+ SV **start;
if (PL_sortcop) {
PERL_CONTEXT *cx;
SV** newsp;
}
PUSHBLOCK(cx, CXt_NULL, PL_stack_base);
- if (!(PL_op->op_flags & OPf_SPECIAL)) {
+ if (!(flags & OPf_SPECIAL)) {
cx->cx_type = CXt_SUB;
cx->blk_gimme = G_SCALAR;
PUSHSUB(cx);
CX_CURPAD_SAVE(cx->blk_sub);
cx->blk_sub.argarray = av;
}
- sortsvp(aTHX_ p1-max, max,
- is_xsub ? sortcv_xsub : hasargs ? sortcv_stacked : sortcv);
+
+ start = p1 - max;
+ sortsvp(aTHX_ start, max,
+ is_xsub ? sortcv_xsub : hasargs ? sortcv_stacked : sortcv);
POPBLOCK(cx,PL_curpm);
PL_stack_sp = newsp;
}
else {
MEXTEND(SP, 20); /* Can't afford stack realloc on signal. */
- sortsvp(aTHX_ sorting_av ? AvARRAY(av) : ORIGMARK+1, max,
- (PL_op->op_private & OPpSORT_NUMERIC)
- ? ( (PL_op->op_private & OPpSORT_INTEGER)
+ start = sorting_av ? AvARRAY(av) : ORIGMARK+1;
+ sortsvp(aTHX_ start, max,
+ (priv & OPpSORT_NUMERIC)
+ ? ( (priv & OPpSORT_INTEGER)
? ( overloading ? amagic_i_ncmp : sv_i_ncmp)
: ( overloading ? amagic_ncmp : sv_ncmp))
: ( IN_LOCALE_RUNTIME
? amagic_cmp_locale
: sv_cmp_locale_static)
: ( overloading ? amagic_cmp : sv_cmp_static)));
- if (PL_op->op_private & OPpSORT_REVERSE) {
- SV **p = sorting_av ? AvARRAY(av) : ORIGMARK+1;
- SV **q = p+max-1;
- while (p < q) {
- SV *tmp = *p;
- *p++ = *q;
- *q-- = tmp;
- }
+ }
+ if (priv & OPpSORT_REVERSE) {
+ SV **q = start+max-1;
+ while (start < q) {
+ SV *tmp = *start;
+ *start++ = *q;
+ *q-- = tmp;
}
}
}
SV *sv;
SV** base, **didstore;
for (base = ORIGMARK+1, i=0; i < max; i++) {
- sv = NEWSV(28,0);
- sv_setsv(sv, base[i]);
+ sv = newSVsv(base[i]);
base[i] = sv;
}
av_clear(av);
static I32
sortcv(pTHX_ SV *a, SV *b)
{
+ dVAR;
I32 oldsaveix = PL_savestack_ix;
I32 oldscopeix = PL_scopestack_ix;
I32 result;
static I32
sortcv_stacked(pTHX_ SV *a, SV *b)
{
+ dVAR;
I32 oldsaveix = PL_savestack_ix;
I32 oldscopeix = PL_scopestack_ix;
I32 result;
SV** ary = AvALLOC(av);
if (AvARRAY(av) != ary) {
AvMAX(av) += AvARRAY(av) - AvALLOC(av);
- SvPVX(av) = (char*)ary;
+ SvPV_set(av, (char*)ary);
}
if (AvMAX(av) < 1) {
AvMAX(av) = 1;
Renew(ary,2,SV*);
- SvPVX(av) = (char*)ary;
+ SvPV_set(av, (char*)ary);
}
}
AvFILLp(av) = 1;
static I32
sortcv_xsub(pTHX_ SV *a, SV *b)
{
- dSP;
+ dVAR; dSP;
I32 oldsaveix = PL_savestack_ix;
I32 oldscopeix = PL_scopestack_ix;
I32 result;
}
return sv_cmp_locale(str1, str2);
}
+
+/*
+ * Local variables:
+ * c-indentation-style: bsd
+ * c-basic-offset: 4
+ * indent-tabs-mode: t
+ * End:
+ *
+ * ex: set ts=8 sts=4 sw=4 noet:
+ */
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