mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-27 21:20:18 +00:00
600927014b
* locale/locale.c: Include errno.h. * locale/localedef.c: Likewise. Tue Sep 19 00:02:06 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu> * Makefile (distclean-1): Remove config.cache, config.log, config.h. (parent-mostlyclean): Remove all flavors of the parent library. * misc/mntent.c (getmntent): Skip multiple whitespace chars between fields. * hurd/hurdstartup.c (_hurd_startup): If RPC returns EXEC_STACK_ARGS flag, get args from stack. If args on stack but have info from RPC, relocate args on stack to make space for struct hurd_startup_data. * elf/dl-object.c: Include errno.h. * posix/execvp.c: Likewise. * dirent/scandir.c: Likewise. * sysdeps/posix/system.c: Likewise. * sysdeps/generic/setenv.c: Likewise. * stdlib/msort.c: Likewise. * stdio/memstream.c: Likewise. * stdio/fclose.c: Likewise. * stdio/getdelim.c: Likewise. * stdio/setvbuf.c: Likewise. * sysdeps/ieee754/ldexp.c: Likewise. * locale/locfile-parse.c: Likewise. * stdlib/lcong48_r.c: Don't check for null argument; let it fault. * stdlib/seed48_r.c: Likewise. * stdlib/srand48_r.c: Likewise. * stdlib/jrand48_r.c: Likewise. * stdlib/nrand48_r.c: Likewise. * misc/search.h: Many decls for hsearch functions.
117 lines
2.7 KiB
C
117 lines
2.7 KiB
C
/* msort -- an alternative to qsort, with an identical interface.
|
|
Copyright (C) 1992, 1995 Free Software Foundation, Inc.
|
|
Written by Mike Haertel, September 1988.
|
|
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If
|
|
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
|
|
Cambridge, MA 02139, USA. */
|
|
|
|
#include <ansidecl.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <memcopy.h>
|
|
#include <errno.h>
|
|
|
|
static void
|
|
DEFUN(msort_with_tmp, (b, n, s, cmp, t),
|
|
PTR b AND size_t n AND size_t s AND __compar_fn_t cmp AND char *t)
|
|
{
|
|
char *tmp;
|
|
char *b1, *b2;
|
|
size_t n1, n2;
|
|
|
|
if (n <= 1)
|
|
return;
|
|
|
|
n1 = n / 2;
|
|
n2 = n - n1;
|
|
b1 = b;
|
|
b2 = (char *) b + (n1 * s);
|
|
|
|
msort_with_tmp (b1, n1, s, cmp, t);
|
|
msort_with_tmp (b2, n2, s, cmp, t);
|
|
|
|
tmp = t;
|
|
|
|
if (s == OPSIZ && (b1 - (char *) 0) % OPSIZ == 0)
|
|
/* We are operating on aligned words. Use direct word stores. */
|
|
while (n1 > 0 && n2 > 0)
|
|
{
|
|
if ((*cmp) (b1, b2) <= 0)
|
|
{
|
|
--n1;
|
|
*((op_t *) tmp)++ = *((op_t *) b1)++;
|
|
}
|
|
else
|
|
{
|
|
--n2;
|
|
*((op_t *) tmp)++ = *((op_t *) b2)++;
|
|
}
|
|
}
|
|
else
|
|
while (n1 > 0 && n2 > 0)
|
|
{
|
|
if ((*cmp) (b1, b2) <= 0)
|
|
{
|
|
memcpy (tmp, b1, s);
|
|
b1 += s;
|
|
--n1;
|
|
}
|
|
else
|
|
{
|
|
memcpy (tmp, b2, s);
|
|
b2 += s;
|
|
--n2;
|
|
}
|
|
tmp += s;
|
|
}
|
|
if (n1 > 0)
|
|
memcpy (tmp, b1, n1 * s);
|
|
memcpy (b, t, (n - n2) * s);
|
|
}
|
|
|
|
void
|
|
DEFUN(qsort, (b, n, s, cmp),
|
|
PTR b AND size_t n AND size_t s AND __compar_fn_t cmp)
|
|
{
|
|
CONST size_t size = n * s;
|
|
|
|
if (size < 1024)
|
|
/* The temporary array is small, so put it on the stack. */
|
|
msort_with_tmp (b, n, s, cmp, __alloca (size));
|
|
else
|
|
{
|
|
/* It's somewhat large, so malloc it. */
|
|
int save = errno;
|
|
char *tmp = malloc (size);
|
|
if (tmp == NULL)
|
|
{
|
|
/* Couldn't get space, so use the slower algorithm
|
|
that doesn't need a temporary array. */
|
|
extern void EXFUN(_quicksort, (PTR __base,
|
|
size_t __nmemb, size_t __size,
|
|
__compar_fn_t __compar));
|
|
_quicksort (b, n, s, cmp);
|
|
}
|
|
else
|
|
{
|
|
msort_with_tmp (b, n, s, cmp, tmp);
|
|
free (tmp);
|
|
}
|
|
errno = save;
|
|
}
|
|
}
|