/* pp_sort.c
*
* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- * 2000, 2001, 2002, 2003, 2004, 2005, by Larry Wall and others
+ * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 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.
#define sv_cmp_static Perl_sv_cmp
#define sv_cmp_locale_static Perl_sv_cmp_locale
-#define dSORTHINTS SV *hintsv = GvSV(gv_fetchpv("sort::hints", GV_ADDMULTI, SVt_IV))
-#define SORTHINTS (SvIOK(hintsv) ? ((I32)SvIV(hintsv)) : 0)
-
#ifndef SMALLSORT
#define SMALLSORT (200)
#endif
+/* Flags for qsortsv and mergesortsv */
+#define SORTf_DESC 1
+#define SORTf_STABLE 2
+#define SORTf_QSORT 4
+
/*
* The mergesort implementation is by Peter M. Mcilroy <pmcilroy@lucent.com>.
*
static I32
cmp_desc(pTHX_ gptr a, gptr b)
{
+ dVAR;
return -PL_sort_RealCmp(aTHX_ a, b);
}
STATIC void
S_mergesortsv(pTHX_ gptr *base, size_t nmemb, SVCOMPARE_t cmp, U32 flags)
{
+ dVAR;
IV i, run, offset;
I32 sense, level;
register gptr *f1, *f2, *t, *b, *p;
static I32
cmpindir(pTHX_ gptr a, gptr b)
{
+ dVAR;
gptr * const ap = (gptr *)a;
gptr * const bp = (gptr *)b;
const I32 sense = PL_sort_RealCmp(aTHX_ *ap, *bp);
static I32
cmpindir_desc(pTHX_ gptr a, gptr b)
{
+ dVAR;
gptr * const ap = (gptr *)a;
gptr * const bp = (gptr *)b;
const I32 sense = PL_sort_RealCmp(aTHX_ *ap, *bp);
STATIC void
S_qsortsv(pTHX_ gptr *list1, size_t nmemb, SVCOMPARE_t cmp, U32 flags)
{
-
- dSORTHINTS;
-
- if (SORTHINTS & HINT_SORT_STABLE) {
+ dVAR;
+ if ((flags & SORTf_STABLE) != 0) {
register gptr **pp, *q;
register size_t n, j, i;
gptr *small[SMALLSORT], **indir, tmp;
/* sort, with indirection */
S_qsortsvu(aTHX_ (gptr *)indir, nmemb,
- flags ? cmpindir_desc : cmpindir);
+ ((flags & SORTf_DESC) != 0 ? cmpindir_desc : cmpindir));
pp = indir;
q = list1;
if (indir != small) { Safefree(indir); }
/* restore prevailing comparison routine */
PL_sort_RealCmp = savecmp;
- } else if (flags) {
+ } else if ((flags & SORTf_DESC) != 0) {
SVCOMPARE_t savecmp = PL_sort_RealCmp; /* Save current comparison routine, if any */
PL_sort_RealCmp = cmp; /* Put comparison routine where cmp_desc can find it */
cmp = cmp_desc;
sortsv(AvARRAY(av), av_len(av)+1, Perl_sv_cmp_locale);
-See lib/sort.pm for details about controlling the sorting algorithm.
+Currently this always uses mergesort. See sortsv_flags for a more
+flexible routine.
=cut
*/
void
Perl_sortsv(pTHX_ SV **array, size_t nmemb, SVCOMPARE_t cmp)
{
- void (*sortsvp)(pTHX_ SV **array, size_t nmemb, SVCOMPARE_t cmp, U32 flags)
- = S_mergesortsv;
- dSORTHINTS;
- const I32 hints = SORTHINTS;
- if (hints & HINT_SORT_QUICKSORT) {
- sortsvp = S_qsortsv;
- }
- else {
- /* The default as of 5.8.0 is mergesort */
- sortsvp = S_mergesortsv;
- }
-
- sortsvp(aTHX_ array, nmemb, cmp, 0);
+ sortsv_flags(array, nmemb, cmp, 0);
}
+/*
+=for apidoc sortsv_flags
-static void
-S_sortsv_desc(pTHX_ SV **array, size_t nmemb, SVCOMPARE_t cmp)
+Sort an array, with various options.
+
+=cut
+*/
+void
+Perl_sortsv_flags(pTHX_ SV **array, size_t nmemb, SVCOMPARE_t cmp, U32 flags)
{
void (*sortsvp)(pTHX_ SV **array, size_t nmemb, SVCOMPARE_t cmp, U32 flags)
- = S_mergesortsv;
- dSORTHINTS;
- const I32 hints = SORTHINTS;
- if (hints & HINT_SORT_QUICKSORT) {
- sortsvp = S_qsortsv;
- }
- else {
- /* The default as of 5.8.0 is mergesort */
- sortsvp = S_mergesortsv;
- }
+ = ((flags & SORTf_QSORT) != 0 ? S_qsortsv : S_mergesortsv);
- sortsvp(aTHX_ array, nmemb, cmp, 1);
+ sortsvp(aTHX_ array, nmemb, cmp, flags);
}
#define SvNSIOK(sv) ((SvFLAGS(sv) & SVf_NOK) || ((SvFLAGS(sv) & (SVf_IOK|SVf_IVisUV)) == SVf_IOK))
dVAR; dSP; dMARK; dORIGMARK;
register SV **p1 = ORIGMARK+1, **p2;
register I32 max, i;
- AV* av = Nullav;
+ AV* av = NULL;
HV *stash;
GV *gv;
- CV *cv = 0;
+ CV *cv = NULL;
I32 gimme = GIMME;
OP* const nextop = PL_op->op_next;
I32 overloading = 0;
I32 sorting_av = 0;
const U8 priv = PL_op->op_private;
const U8 flags = PL_op->op_flags;
- void (*sortsvp)(pTHX_ SV **array, size_t nmemb, SVCOMPARE_t cmp)
- = Perl_sortsv;
+ U32 sort_flags = 0;
+ void (*sortsvp)(pTHX_ SV **array, size_t nmemb, SVCOMPARE_t cmp, U32 flags)
+ = Perl_sortsv_flags;
I32 all_SIVs = 1;
+ if ((priv & OPpSORT_DESCEND) != 0)
+ sort_flags |= SORTf_DESC;
+ if ((priv & OPpSORT_QSORT) != 0)
+ sort_flags |= SORTf_QSORT;
+ if ((priv & OPpSORT_STABLE) != 0)
+ sort_flags |= SORTf_STABLE;
+
if (gimme != G_ARRAY) {
SP = MARK;
EXTEND(SP,1);
max = SP - MARK;
}
- if (priv & OPpSORT_DESCEND) {
- sortsvp = S_sortsv_desc;
- }
-
/* shuffle stack down, removing optional initial cv (p1!=p2), plus
* any nulls; also stringify or converting to integer or number as
* required any args */
SAVESPTR(PL_firstgv);
SAVESPTR(PL_secondgv);
SAVESPTR(PL_sortstash);
- PL_firstgv = gv_fetchpv("a", TRUE, SVt_PV);
- PL_secondgv = gv_fetchpv("b", TRUE, SVt_PV);
+ PL_firstgv = gv_fetchpvs("a", TRUE, SVt_PV);
+ PL_secondgv = gv_fetchpvs("b", TRUE, SVt_PV);
PL_sortstash = stash;
SAVESPTR(GvSV(PL_firstgv));
SAVESPTR(GvSV(PL_secondgv));
start = p1 - max;
sortsvp(aTHX_ start, max,
- is_xsub ? S_sortcv_xsub : hasargs ? S_sortcv_stacked : S_sortcv);
+ (is_xsub ? S_sortcv_xsub : hasargs ? S_sortcv_stacked : S_sortcv),
+ sort_flags);
if (!(flags & OPf_SPECIAL)) {
LEAVESUB(cv);
PL_stack_sp = newsp;
POPSTACK;
CATCH_SET(oldcatch);
- FREETMPS;
}
else {
MEXTEND(SP, 20); /* Can't afford stack realloc on signal. */
? ( overloading
? S_amagic_cmp_locale
: sv_cmp_locale_static)
- : ( overloading ? S_amagic_cmp : sv_cmp_static)));
+ : ( overloading ? S_amagic_cmp : sv_cmp_static)),
+ sort_flags);
}
- if (priv & OPpSORT_REVERSE) {
+ if ((priv & OPpSORT_REVERSE) != 0) {
SV **q = start+max-1;
while (start < q) {
SV * const tmp = *start;
static I32
S_amagic_ncmp(pTHX_ register SV *a, register SV *b)
{
+ dVAR;
SV * const tmpsv = tryCALL_AMAGICbin(a,b,ncmp);
if (tmpsv) {
if (SvIOK(tmpsv)) {
static I32
S_amagic_i_ncmp(pTHX_ register SV *a, register SV *b)
{
+ dVAR;
SV * const tmpsv = tryCALL_AMAGICbin(a,b,ncmp);
if (tmpsv) {
if (SvIOK(tmpsv)) {
static I32
S_amagic_cmp(pTHX_ register SV *str1, register SV *str2)
{
+ dVAR;
SV * const tmpsv = tryCALL_AMAGICbin(str1,str2,scmp);
if (tmpsv) {
if (SvIOK(tmpsv)) {
static I32
S_amagic_cmp_locale(pTHX_ register SV *str1, register SV *str2)
{
+ dVAR;
SV * const tmpsv = tryCALL_AMAGICbin(str1,str2,scmp);
if (tmpsv) {
if (SvIOK(tmpsv)) {
https://perl5.git.perl.org / perl5.git / blobdiff