mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-26 06:50:07 +00:00
1d8dc4293f
* sysdeps/posix/getcwd.c [__GNU_LIBRARY__]: Include unistd.h. * io/fts.h (FTSENT): Define fts_compar member with prototype. * hurd/hurd.h: Use prototype in getcttyid decl. * stdlib/l64a.c: Fix typo in last change. * stdlib/drand48-iter.c: Test limits.h macros instead of sizeof for determining size of types. * stdlib/srand48_r.c: Likewise. * misc/utmp.h: Declare login, logout, logwtmp. * misc/logout.c: Declare argument as pointer to const. * misc/login.c: Likewise. * misc/logwtmp.c: Likewise. Include time.h, string.h. * misc/efgcvt_r.c: Include stdlib.h. * io/mknod.c: Include sys/types.h. * gmon/sys/gmon.h: Declare monstartup, _mcleanup. * csu/gmon-start.c (_start, etext): Declare with prototypes. * stdio-common/vfscanf.c (%[): Fix range handling.
101 lines
2.9 KiB
C
101 lines
2.9 KiB
C
/* Copyright (C) 1995, 1996 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
|
|
|
|
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., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <errno.h>
|
|
#include <stdlib.h>
|
|
#include <limits.h>
|
|
|
|
|
|
/* Global state for non-reentrent functions. */
|
|
struct drand48_data __libc_drand48_data;
|
|
|
|
|
|
int
|
|
__drand48_iterate (xsubi, buffer)
|
|
unsigned short int xsubi[3];
|
|
struct drand48_data *buffer;
|
|
{
|
|
/* Be generous for the arguments, detect some errors. */
|
|
if (xsubi == NULL || buffer == NULL)
|
|
{
|
|
errno = EFAULT;
|
|
return -1;
|
|
}
|
|
|
|
/* Initialize buffer, if not yet done. */
|
|
if (!buffer->init)
|
|
{
|
|
#if (USHRT_MAX == 0xffffU)
|
|
buffer->a[2] = 0x5;
|
|
buffer->a[1] = 0xdeec;
|
|
buffer->a[0] = 0xe66d;
|
|
#else
|
|
buffer->a[2] = 0x5deecUL;
|
|
buffer->a[1] = 0xe66d0000UL;
|
|
buffer->a[0] = 0;
|
|
#endif
|
|
buffer->c = 0xb;
|
|
buffer->init = 1;
|
|
}
|
|
|
|
/* Do the real work. We choose a data type which contains at least
|
|
48 bits. Because we compute the modulus it does not care how
|
|
many bits really are computed. */
|
|
|
|
if (sizeof (long int) >= 6)
|
|
{
|
|
/* The `long' data type is sufficent. */
|
|
unsigned long int X, a, result;
|
|
|
|
#define ONE_STEP \
|
|
if (sizeof (unsigned short int) == 2) \
|
|
{ \
|
|
X = (xsubi[2] << 16 | xsubi[1]) << 16 | xsubi[0]; \
|
|
a = (buffer->a[2] << 16 | buffer->a[1]) << 16 | buffer->a[0]; \
|
|
\
|
|
result = X * a + buffer->c; \
|
|
\
|
|
xsubi[0] = result & 0xffff; \
|
|
result >>= 16; \
|
|
xsubi[1] = result & 0xffff; \
|
|
result >>= 16; \
|
|
xsubi[2] = result & 0xffff; \
|
|
} \
|
|
else \
|
|
{ \
|
|
X = xsubi[2] << 16 | xsubi[1] >> 16; \
|
|
a = buffer->a[2] << 16 | buffer->a[1] >> 16; \
|
|
\
|
|
result = X * a + buffer->c; \
|
|
\
|
|
xsubi[0] = result >> 16 & 0xffffffffl; \
|
|
xsubi[1] = result << 16 & 0xffff0000l; \
|
|
}
|
|
ONE_STEP;
|
|
}
|
|
else
|
|
{
|
|
/* We have to use the `long long' data type. */
|
|
unsigned long long int X, a, result;
|
|
ONE_STEP;
|
|
}
|
|
|
|
return 0;
|
|
}
|