glibc/stdlib/msort.c

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/* An alternative to qsort, with an identical interface.
update from main archive 970209 1997-02-09 02:59 Ulrich Drepper <drepper@cygnus.com> * version.h (VERSION): Bump to 2.0.2. * posix/Makefile (routines): Add getopt_init. * posix/getopt.c: Don't get environment variable with nonoption flags here. Depend on __getopt_nonoption_flags variable filled somewhere else. This is necessary since the variable must be removed even when getopt isn't used in case exec(2) gets called. * posix/getopt_init.c: New file. Initialize __getopt_nonoption_flags and remove environment variable. * sysdeps/i386/init-first.c: Call __getopt_clean_environment. * sysdeps/mach/hurd/i386/init-first.c: Likewise. * sysdeps/stub/init-first.c: Likewise. * sysdeps/unix/sysv/linux/init-first.c: Likewise. * sysdeps/generic/dl-sysdep.c (_dl_sysdep_start): Recognize AT_PAGESZ entry in auxiliary vector and store value in _dl_pagesize. * sysdeps/generic/crypt-entry.h: Return EOPNOTSUPP when DES encryption is wanted. * libio/vsnprintf.c: If MAXLEN is 0 return 0. * stdio/vsnprintf.c: Likewise. Reported by Philip Blundell <pjb27@cam.ac.uk>. 1997-02-07 17:43 Ulrich Drepper <drepper@cygnus.com> * sysdeps/generic/sysd-stdio.c: Include <errno.h>. Change PTR to void *. * sysdeps/posix/vdprintf.c: Change PTR to void *. Reported by Brian Oxley <boxley%dev.cm.ssb.com@clipper.ssb.com>. 1997-02-07 17:41 Philip Blundell <pjb27@cam.ac.uk> * sysdeps/unix/sysv/linux/socketbits.h: Fix typo. 1997-02-06 13:49 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * rellns-sh: No need to check for existance of first parameter. 1997-02-06 14:50 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/posix/getcwd.c (__getcwd): Fix resource leaks. Reported by David Holland <dholland@eecs.harvard.edu>. 1997-02-06 14:38 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sunrpc/clnt_tcp.c (readtcp): Pass copy of timeout value to select, in case it is modified by the latter. * sunrpc/clnt_udp.c (clntudp_call): Likewise. * sunrpc/pmap_rmt.c (clnt_broadcast): Likewise. * sunrpc/svc_tcp.c (readtcp): Likewise. * sunrpc/svc_authux.c (_svcauth_unix): Fix type of area_gids array. * sunrpc/authuxprot.c (xdr_authunix_parms): Check size of uid_t and gid_t. * sunrpc/auth_unix.c (authunix_validate): Fix type of second argument. 1997-02-06 14:29 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * elf/Makefile (extra-objs): Don't zap previous value. * Makefile (before-compile): Likewise. Don't add gnu/lib-names.h twice. 1997-02-06 14:19 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/unix/sysv/linux/m68k/brk.c: Add workaround for braindamage (sigh!). 1997-02-06 17:10 Jim Meyering <meyering@asic.sc.ti.com> * manual/memory.texi: Correct `copystring' example for obstacks. 1997-02-06 14:10 Ulrich Drepper <drepper@cygnus.com> * Makeconfig: Don't use [:lower:] and [:upper:] in tr since old GNU tr don't grok it. 1997-02-03 21:13 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/unix/sysv/linux/socketbits.h [__GNUC__<2] (struct cmsghdr): Don't use GNU C extensions. (CMSG_DATA): Use portable definition. 1997-02-05 05:58 Ulrich Drepper <drepper@cygnus.com> * elf/ldd.bash.in: Add test for read permission and print appropriate message. Change warning and error messages to print "ldd: " at start. * elf/ldd.sh.in: Likewise. * stdlib/Makefile (routines): Add atoll. * stdlib/atoll.c: New file. * stdlib/stdlib.h: Add prototype and optimization for atoll. * stdlib/a64l.c: Update copyright. * stdlib/abs.c: Likewise. * stdlib/atof.c: Likewise. * stdlib/atoi.c: Likewise. * stdlib/atol.c: Likewise. * stdlib/bsearch.c: Likewise. * stdlib/exit.c: Likewise. * stdlib/fpioconst.c: Likewise. * stdlib/fpioconst.h: Likewise. * stdlib/jrand48.c: Likewise. * stdlib/jrand48_r.c: Likewise. * stdlib/labs.c: Likewise. * stdlib/lcong48.c: Likewise. * stdlib/lcong48_r.c: Likewise. * stdlib/llabs.c: Likewise. * stdlib/lrand48.c: Likewise. * stdlib/lrand48_r.c: Likewise. * stdlib/mblen.c: Likewise. * stdlib/mbstowcs.c: Likewise. * stdlib/mbtowc.c: Likewise. * stdlib/mp_clz_tab.c: Likewise. * stdlib/mrand48.c: Likewise. * stdlib/mrand48_r.c: Likewise. * stdlib/msort.c: Likewise. * stdlib/nrand48.c: Likewise. * stdlib/nrand48_r.c: Likewise. * stdlib/qsort.c: Likewise. * stdlib/rpmatch.c: Likewise. * stdlib/seed48.c: Likewise. * stdlib/seed48_r.c: Likewise. * stdlib/srand48.c: Likewise. * stdlib/srand48_r.c: Likewise. * stdlib/strtod.c: Likewise. * stdlib/wcstombs.c: Likewise. * stdlib/wctomb.c: Likewise. 1997-02-05 05:08 Ulrich Drepper <drepper@cygnus.com> * stdlib/mp_clz_tab.c (__clz_tab): Follow change in GMP and define as const. 1997-02-04 23:57 Fila Kolodny <fila@ibi.com> * sysdeps/unix/sysv/linux/socketbits.h: Define __need_NULL before including <stddef.h>. 1997-02-03 20:01 H.J. Lu <hjl@gnu.ai.mit.edu> * time/Makefile (tzbases, tzlinks): New. (tzfiles): Changed to $(tzbases) $(tzlinks). ($(tzfiles:%=$(objpfx)z.%): Make $(tzlinks) depend on $(tzbases). 1997-02-02 12:13 H.J. Lu <hjl@gnu.ai.mit.edu> * Makefile (install): Ignore error from ldconfig. * time/zic.c (mkdirs): Double check the error return of mkdir (). 1997-02-04 22:01 Ulrich Drepper <drepper@cygnus.com> * stdio-common/vfprintf.c: Prepare to use __va_copy for architectures like PPC where va_list is no integral type. 1997-02-04 15:27 Roma Ekzhanov <ekzhanov@paragraph.com> * posix/getopt.c (exchange): Don't allocate nonoption_flags array if nonoption_flags_len == -1.
1997-02-10 04:19:57 +01:00
This file is part of the GNU C Library.
Copyright (C) 1992,95-97,99,2000,01,02,04,07 Free Software Foundation, Inc.
Written by Mike Haertel, September 1988.
1995-02-18 02:27:10 +01:00
update from main archive 970209 1997-02-09 02:59 Ulrich Drepper <drepper@cygnus.com> * version.h (VERSION): Bump to 2.0.2. * posix/Makefile (routines): Add getopt_init. * posix/getopt.c: Don't get environment variable with nonoption flags here. Depend on __getopt_nonoption_flags variable filled somewhere else. This is necessary since the variable must be removed even when getopt isn't used in case exec(2) gets called. * posix/getopt_init.c: New file. Initialize __getopt_nonoption_flags and remove environment variable. * sysdeps/i386/init-first.c: Call __getopt_clean_environment. * sysdeps/mach/hurd/i386/init-first.c: Likewise. * sysdeps/stub/init-first.c: Likewise. * sysdeps/unix/sysv/linux/init-first.c: Likewise. * sysdeps/generic/dl-sysdep.c (_dl_sysdep_start): Recognize AT_PAGESZ entry in auxiliary vector and store value in _dl_pagesize. * sysdeps/generic/crypt-entry.h: Return EOPNOTSUPP when DES encryption is wanted. * libio/vsnprintf.c: If MAXLEN is 0 return 0. * stdio/vsnprintf.c: Likewise. Reported by Philip Blundell <pjb27@cam.ac.uk>. 1997-02-07 17:43 Ulrich Drepper <drepper@cygnus.com> * sysdeps/generic/sysd-stdio.c: Include <errno.h>. Change PTR to void *. * sysdeps/posix/vdprintf.c: Change PTR to void *. Reported by Brian Oxley <boxley%dev.cm.ssb.com@clipper.ssb.com>. 1997-02-07 17:41 Philip Blundell <pjb27@cam.ac.uk> * sysdeps/unix/sysv/linux/socketbits.h: Fix typo. 1997-02-06 13:49 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * rellns-sh: No need to check for existance of first parameter. 1997-02-06 14:50 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/posix/getcwd.c (__getcwd): Fix resource leaks. Reported by David Holland <dholland@eecs.harvard.edu>. 1997-02-06 14:38 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sunrpc/clnt_tcp.c (readtcp): Pass copy of timeout value to select, in case it is modified by the latter. * sunrpc/clnt_udp.c (clntudp_call): Likewise. * sunrpc/pmap_rmt.c (clnt_broadcast): Likewise. * sunrpc/svc_tcp.c (readtcp): Likewise. * sunrpc/svc_authux.c (_svcauth_unix): Fix type of area_gids array. * sunrpc/authuxprot.c (xdr_authunix_parms): Check size of uid_t and gid_t. * sunrpc/auth_unix.c (authunix_validate): Fix type of second argument. 1997-02-06 14:29 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * elf/Makefile (extra-objs): Don't zap previous value. * Makefile (before-compile): Likewise. Don't add gnu/lib-names.h twice. 1997-02-06 14:19 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/unix/sysv/linux/m68k/brk.c: Add workaround for braindamage (sigh!). 1997-02-06 17:10 Jim Meyering <meyering@asic.sc.ti.com> * manual/memory.texi: Correct `copystring' example for obstacks. 1997-02-06 14:10 Ulrich Drepper <drepper@cygnus.com> * Makeconfig: Don't use [:lower:] and [:upper:] in tr since old GNU tr don't grok it. 1997-02-03 21:13 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/unix/sysv/linux/socketbits.h [__GNUC__<2] (struct cmsghdr): Don't use GNU C extensions. (CMSG_DATA): Use portable definition. 1997-02-05 05:58 Ulrich Drepper <drepper@cygnus.com> * elf/ldd.bash.in: Add test for read permission and print appropriate message. Change warning and error messages to print "ldd: " at start. * elf/ldd.sh.in: Likewise. * stdlib/Makefile (routines): Add atoll. * stdlib/atoll.c: New file. * stdlib/stdlib.h: Add prototype and optimization for atoll. * stdlib/a64l.c: Update copyright. * stdlib/abs.c: Likewise. * stdlib/atof.c: Likewise. * stdlib/atoi.c: Likewise. * stdlib/atol.c: Likewise. * stdlib/bsearch.c: Likewise. * stdlib/exit.c: Likewise. * stdlib/fpioconst.c: Likewise. * stdlib/fpioconst.h: Likewise. * stdlib/jrand48.c: Likewise. * stdlib/jrand48_r.c: Likewise. * stdlib/labs.c: Likewise. * stdlib/lcong48.c: Likewise. * stdlib/lcong48_r.c: Likewise. * stdlib/llabs.c: Likewise. * stdlib/lrand48.c: Likewise. * stdlib/lrand48_r.c: Likewise. * stdlib/mblen.c: Likewise. * stdlib/mbstowcs.c: Likewise. * stdlib/mbtowc.c: Likewise. * stdlib/mp_clz_tab.c: Likewise. * stdlib/mrand48.c: Likewise. * stdlib/mrand48_r.c: Likewise. * stdlib/msort.c: Likewise. * stdlib/nrand48.c: Likewise. * stdlib/nrand48_r.c: Likewise. * stdlib/qsort.c: Likewise. * stdlib/rpmatch.c: Likewise. * stdlib/seed48.c: Likewise. * stdlib/seed48_r.c: Likewise. * stdlib/srand48.c: Likewise. * stdlib/srand48_r.c: Likewise. * stdlib/strtod.c: Likewise. * stdlib/wcstombs.c: Likewise. * stdlib/wctomb.c: Likewise. 1997-02-05 05:08 Ulrich Drepper <drepper@cygnus.com> * stdlib/mp_clz_tab.c (__clz_tab): Follow change in GMP and define as const. 1997-02-04 23:57 Fila Kolodny <fila@ibi.com> * sysdeps/unix/sysv/linux/socketbits.h: Define __need_NULL before including <stddef.h>. 1997-02-03 20:01 H.J. Lu <hjl@gnu.ai.mit.edu> * time/Makefile (tzbases, tzlinks): New. (tzfiles): Changed to $(tzbases) $(tzlinks). ($(tzfiles:%=$(objpfx)z.%): Make $(tzlinks) depend on $(tzbases). 1997-02-02 12:13 H.J. Lu <hjl@gnu.ai.mit.edu> * Makefile (install): Ignore error from ldconfig. * time/zic.c (mkdirs): Double check the error return of mkdir (). 1997-02-04 22:01 Ulrich Drepper <drepper@cygnus.com> * stdio-common/vfprintf.c: Prepare to use __va_copy for architectures like PPC where va_list is no integral type. 1997-02-04 15:27 Roma Ekzhanov <ekzhanov@paragraph.com> * posix/getopt.c (exchange): Don't allocate nonoption_flags array if nonoption_flags_len == -1.
1997-02-10 04:19:57 +01:00
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
1995-02-18 02:27:10 +01:00
update from main archive 970209 1997-02-09 02:59 Ulrich Drepper <drepper@cygnus.com> * version.h (VERSION): Bump to 2.0.2. * posix/Makefile (routines): Add getopt_init. * posix/getopt.c: Don't get environment variable with nonoption flags here. Depend on __getopt_nonoption_flags variable filled somewhere else. This is necessary since the variable must be removed even when getopt isn't used in case exec(2) gets called. * posix/getopt_init.c: New file. Initialize __getopt_nonoption_flags and remove environment variable. * sysdeps/i386/init-first.c: Call __getopt_clean_environment. * sysdeps/mach/hurd/i386/init-first.c: Likewise. * sysdeps/stub/init-first.c: Likewise. * sysdeps/unix/sysv/linux/init-first.c: Likewise. * sysdeps/generic/dl-sysdep.c (_dl_sysdep_start): Recognize AT_PAGESZ entry in auxiliary vector and store value in _dl_pagesize. * sysdeps/generic/crypt-entry.h: Return EOPNOTSUPP when DES encryption is wanted. * libio/vsnprintf.c: If MAXLEN is 0 return 0. * stdio/vsnprintf.c: Likewise. Reported by Philip Blundell <pjb27@cam.ac.uk>. 1997-02-07 17:43 Ulrich Drepper <drepper@cygnus.com> * sysdeps/generic/sysd-stdio.c: Include <errno.h>. Change PTR to void *. * sysdeps/posix/vdprintf.c: Change PTR to void *. Reported by Brian Oxley <boxley%dev.cm.ssb.com@clipper.ssb.com>. 1997-02-07 17:41 Philip Blundell <pjb27@cam.ac.uk> * sysdeps/unix/sysv/linux/socketbits.h: Fix typo. 1997-02-06 13:49 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * rellns-sh: No need to check for existance of first parameter. 1997-02-06 14:50 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/posix/getcwd.c (__getcwd): Fix resource leaks. Reported by David Holland <dholland@eecs.harvard.edu>. 1997-02-06 14:38 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sunrpc/clnt_tcp.c (readtcp): Pass copy of timeout value to select, in case it is modified by the latter. * sunrpc/clnt_udp.c (clntudp_call): Likewise. * sunrpc/pmap_rmt.c (clnt_broadcast): Likewise. * sunrpc/svc_tcp.c (readtcp): Likewise. * sunrpc/svc_authux.c (_svcauth_unix): Fix type of area_gids array. * sunrpc/authuxprot.c (xdr_authunix_parms): Check size of uid_t and gid_t. * sunrpc/auth_unix.c (authunix_validate): Fix type of second argument. 1997-02-06 14:29 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * elf/Makefile (extra-objs): Don't zap previous value. * Makefile (before-compile): Likewise. Don't add gnu/lib-names.h twice. 1997-02-06 14:19 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/unix/sysv/linux/m68k/brk.c: Add workaround for braindamage (sigh!). 1997-02-06 17:10 Jim Meyering <meyering@asic.sc.ti.com> * manual/memory.texi: Correct `copystring' example for obstacks. 1997-02-06 14:10 Ulrich Drepper <drepper@cygnus.com> * Makeconfig: Don't use [:lower:] and [:upper:] in tr since old GNU tr don't grok it. 1997-02-03 21:13 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/unix/sysv/linux/socketbits.h [__GNUC__<2] (struct cmsghdr): Don't use GNU C extensions. (CMSG_DATA): Use portable definition. 1997-02-05 05:58 Ulrich Drepper <drepper@cygnus.com> * elf/ldd.bash.in: Add test for read permission and print appropriate message. Change warning and error messages to print "ldd: " at start. * elf/ldd.sh.in: Likewise. * stdlib/Makefile (routines): Add atoll. * stdlib/atoll.c: New file. * stdlib/stdlib.h: Add prototype and optimization for atoll. * stdlib/a64l.c: Update copyright. * stdlib/abs.c: Likewise. * stdlib/atof.c: Likewise. * stdlib/atoi.c: Likewise. * stdlib/atol.c: Likewise. * stdlib/bsearch.c: Likewise. * stdlib/exit.c: Likewise. * stdlib/fpioconst.c: Likewise. * stdlib/fpioconst.h: Likewise. * stdlib/jrand48.c: Likewise. * stdlib/jrand48_r.c: Likewise. * stdlib/labs.c: Likewise. * stdlib/lcong48.c: Likewise. * stdlib/lcong48_r.c: Likewise. * stdlib/llabs.c: Likewise. * stdlib/lrand48.c: Likewise. * stdlib/lrand48_r.c: Likewise. * stdlib/mblen.c: Likewise. * stdlib/mbstowcs.c: Likewise. * stdlib/mbtowc.c: Likewise. * stdlib/mp_clz_tab.c: Likewise. * stdlib/mrand48.c: Likewise. * stdlib/mrand48_r.c: Likewise. * stdlib/msort.c: Likewise. * stdlib/nrand48.c: Likewise. * stdlib/nrand48_r.c: Likewise. * stdlib/qsort.c: Likewise. * stdlib/rpmatch.c: Likewise. * stdlib/seed48.c: Likewise. * stdlib/seed48_r.c: Likewise. * stdlib/srand48.c: Likewise. * stdlib/srand48_r.c: Likewise. * stdlib/strtod.c: Likewise. * stdlib/wcstombs.c: Likewise. * stdlib/wctomb.c: Likewise. 1997-02-05 05:08 Ulrich Drepper <drepper@cygnus.com> * stdlib/mp_clz_tab.c (__clz_tab): Follow change in GMP and define as const. 1997-02-04 23:57 Fila Kolodny <fila@ibi.com> * sysdeps/unix/sysv/linux/socketbits.h: Define __need_NULL before including <stddef.h>. 1997-02-03 20:01 H.J. Lu <hjl@gnu.ai.mit.edu> * time/Makefile (tzbases, tzlinks): New. (tzfiles): Changed to $(tzbases) $(tzlinks). ($(tzfiles:%=$(objpfx)z.%): Make $(tzlinks) depend on $(tzbases). 1997-02-02 12:13 H.J. Lu <hjl@gnu.ai.mit.edu> * Makefile (install): Ignore error from ldconfig. * time/zic.c (mkdirs): Double check the error return of mkdir (). 1997-02-04 22:01 Ulrich Drepper <drepper@cygnus.com> * stdio-common/vfprintf.c: Prepare to use __va_copy for architectures like PPC where va_list is no integral type. 1997-02-04 15:27 Roma Ekzhanov <ekzhanov@paragraph.com> * posix/getopt.c (exchange): Don't allocate nonoption_flags array if nonoption_flags_len == -1.
1997-02-10 04:19:57 +01:00
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
1995-02-18 02:27:10 +01:00
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
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#include <alloca.h>
#include <stdint.h>
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#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <memcopy.h>
#include <errno.h>
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struct msort_param
{
size_t s;
size_t var;
__compar_fn_t cmp;
char *t;
};
static void msort_with_tmp (const struct msort_param *p, void *b, size_t n);
static void
msort_with_tmp (const struct msort_param *p, void *b, size_t n)
{
char *b1, *b2;
size_t n1, n2;
if (n <= 1)
return;
n1 = n / 2;
n2 = n - n1;
b1 = b;
b2 = (char *) b + (n1 * p->s);
msort_with_tmp (p, b1, n1);
msort_with_tmp (p, b2, n2);
char *tmp = p->t;
const size_t s = p->s;
__compar_fn_t cmp = p->cmp;
switch (p->var)
{
case 0:
while (n1 > 0 && n2 > 0)
{
if ((*cmp) (b1, b2) <= 0)
{
*(uint32_t *) tmp = *(uint32_t *) b1;
b1 += sizeof (uint32_t);
--n1;
}
else
{
*(uint32_t *) tmp = *(uint32_t *) b2;
b2 += sizeof (uint32_t);
--n2;
}
tmp += sizeof (uint32_t);
}
break;
case 1:
while (n1 > 0 && n2 > 0)
{
if ((*cmp) (b1, b2) <= 0)
{
*(uint64_t *) tmp = *(uint64_t *) b1;
b1 += sizeof (uint64_t);
--n1;
}
else
{
*(uint64_t *) tmp = *(uint64_t *) b2;
b2 += sizeof (uint64_t);
--n2;
}
tmp += sizeof (uint64_t);
}
break;
case 2:
while (n1 > 0 && n2 > 0)
{
unsigned long *tmpl = (unsigned long *) tmp;
unsigned long *bl;
tmp += s;
if ((*cmp) (b1, b2) <= 0)
{
bl = (unsigned long *) b1;
b1 += s;
--n1;
}
else
{
bl = (unsigned long *) b2;
b2 += s;
--n2;
}
while (tmpl < (unsigned long *) tmp)
*tmpl++ = *bl++;
}
break;
case 3:
while (n1 > 0 && n2 > 0)
{
if ((*cmp) (*(const void **) b1, *(const void **) b2) <= 0)
{
*(void **) tmp = *(void **) b1;
b1 += sizeof (void *);
--n1;
}
else
{
*(void **) tmp = *(void **) b2;
b2 += sizeof (void *);
--n2;
}
tmp += sizeof (void *);
}
break;
default:
while (n1 > 0 && n2 > 0)
{
if ((*cmp) (b1, b2) <= 0)
{
tmp = (char *) __mempcpy (tmp, b1, s);
b1 += s;
--n1;
}
else
{
tmp = (char *) __mempcpy (tmp, b2, s);
b2 += s;
--n2;
}
}
break;
}
if (n1 > 0)
memcpy (tmp, b1, n1 * s);
memcpy (b, p->t, (n - n2) * s);
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}
void
qsort (void *b, size_t n, size_t s, __compar_fn_t cmp)
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{
size_t size = n * s;
char *tmp = NULL;
struct msort_param p;
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/* For large object sizes use indirect sorting. */
if (s > 32)
size = 2 * n * sizeof (void *) + s;
if (size < 1024)
/* The temporary array is small, so put it on the stack. */
p.t = __alloca (size);
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else
{
/* We should avoid allocating too much memory since this might
have to be backed up by swap space. */
static long int phys_pages;
static int pagesize;
if (phys_pages == 0)
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{
phys_pages = __sysconf (_SC_PHYS_PAGES);
if (phys_pages == -1)
/* Error while determining the memory size. So let's
assume there is enough memory. Otherwise the
implementer should provide a complete implementation of
the `sysconf' function. */
phys_pages = (long int) (~0ul >> 1);
/* The following determines that we will never use more than
a quarter of the physical memory. */
phys_pages /= 4;
pagesize = __sysconf (_SC_PAGESIZE);
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}
/* Just a comment here. We cannot compute
phys_pages * pagesize
and compare the needed amount of memory against this value.
The problem is that some systems might have more physical
memory then can be represented with a `size_t' value (when
measured in bytes. */
/* If the memory requirements are too high don't allocate memory. */
* catgets/open_catalog.c (__open_catalog): Don't use a value type as the __builtin_expect expression, just the Boolean value. * sysdeps/generic/wordexp.c (parse_glob): int -> size_t for counter. * sysdeps/unix/sysv/linux/opensock.c (__opensock): Likewise. * resolv/res_hconf.c (arg_service_list, parse_line): Likewise. * iconvdata/tst-loading.c (main): Likewise. * catgets/tst-catgets.c (main): Likewise. * stdlib/tst-xpg-basename.c (main): Likewise. * stdlib/tst-bsearch.c (main): Likewise. * stdio-common/test-vfprintf.c (main): Likewise. * stdio-common/tst-rndseek.c (do_test): Likewise. * libio/tst_swprintf.c (main): Likewise. * libio/tst-fgetws.c (main): Likewise. * wcsmbs/tst-mbrtowc.c (check_ascii): Likewise. * time/tst-posixtz.c (main): Likewise. * time/tst-strptime.c (test_tm): Likewise. * time/tst-strptime.c (main): Likewise. * time/tst-getdate.c (main): Likewise. * posix/tst-mmap.c (main): Likewise. * posix/tst-getaddrinfo.c (do_test): Likewise. * io/tst-getcwd.c (do_test): Likewise. * resolv/tst-aton.c (main): Likewise. * inet/tst-network.c (main): Likewise. * libio/tst-fgetws.c (main): Likewise. * sysdeps/posix/sprofil.c (add_region): int -> unsigned int for I. * sysdeps/unix/sysv/linux/ptsname.c (__ptsname_r): int -> unsigned int for PTYNO. * stdlib/msort.c (qsort): Add a cast to silence warning. * stdio-common/vfprintf.c (process_string_arg): Likewise. * libio/oldfileops.c (_IO_old_do_write): Likewise. * sysdeps/unix/sysv/linux/getcwd.c (__getcwd): Likewise. * sysdeps/unix/sysv/linux/ttyname.c (ttyname): Likewise. * sysdeps/unix/sysv/linux/gethostid.c (gethostid): Likewise. * argp/argp-fmtstream.c (__argp_fmtstream_printf): Likewise. * nscd/nscd_getgr_r.c (nscd_getgr_r): Likewise. * sysdeps/unix/grantpt.c (grantpt): Likewise. * libio/tst-widetext.c (main): Likewise. * libio/tst-mmap2-eofsync.c (do_test): Likewise. * rt/tst-aio.c (test_file): Likewise. * rt/tst-aio64.c (test_file): Likewise. * resolv/tst-aton.c (main): Likewise. * catgets/catgetsinfo.h (CATGETS_MAGIC): Use U suffix on the constant. * ctype/ctype.c (__ctype_tolower, __ctype_toupper): Cast to int32_t instead of uint32_t in these macros.
2002-09-24 06:24:25 +02:00
if (size / pagesize > (size_t) phys_pages)
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{
_quicksort (b, n, s, cmp);
return;
}
/* It's somewhat large, so malloc it. */
int save = errno;
tmp = malloc (size);
__set_errno (save);
if (tmp == NULL)
{
/* Couldn't get space, so use the slower algorithm
that doesn't need a temporary array. */
_quicksort (b, n, s, cmp);
return;
}
p.t = tmp;
}
p.s = s;
p.cmp = cmp;
p.var = 4;
if (s > 32)
{
/* Indirect sorting. */
char *ip = (char *) b;
void **tp = (void **) (p.t + n * sizeof (void *));
void **t = tp;
void *tmp_storage = (void *) (tp + n);
while ((void *) t < tmp_storage)
{
*t++ = ip;
ip += s;
}
p.s = sizeof (void *);
p.var = 3;
msort_with_tmp (&p, p.t + n * sizeof (void *), n);
/* tp[0] .. tp[n - 1] is now sorted, copy around entries of
the original array. Knuth vol. 3 (2nd ed.) exercise 5.2-10. */
char *kp;
size_t i;
for (i = 0, ip = (char *) b; i < n; i++, ip += s)
if ((kp = tp[i]) != ip)
{
size_t j = i;
char *jp = ip;
memcpy (tmp_storage, ip, s);
do
{
size_t k = (kp - (char *) b) / s;
tp[j] = jp;
memcpy (jp, kp, s);
j = k;
jp = kp;
kp = tp[k];
}
while (kp != ip);
tp[j] = jp;
memcpy (jp, tmp_storage, s);
}
}
else
{
if ((s & (sizeof (uint32_t) - 1)) == 0
&& ((char *) b - (char *) 0) % __alignof__ (uint32_t) == 0)
{
if (s == sizeof (uint32_t))
p.var = 0;
else if (s == sizeof (uint64_t)
&& ((char *) b - (char *) 0) % __alignof__ (uint64_t) == 0)
p.var = 1;
else if ((s & (sizeof (unsigned long) - 1)) == 0
&& ((char *) b - (char *) 0)
% __alignof__ (unsigned long) == 0)
p.var = 2;
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}
msort_with_tmp (&p, b, n);
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}
free (tmp);
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}
libc_hidden_def (qsort)