diff options
Diffstat (limited to 'stdlib/srand48_r.c')
-rw-r--r-- | stdlib/srand48_r.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/stdlib/srand48_r.c b/stdlib/srand48_r.c new file mode 100644 index 0000000000..7e77d1675a --- /dev/null +++ b/stdlib/srand48_r.c @@ -0,0 +1,52 @@ +/* Copyright (C) 1995 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 <stdlib.h> + +int +srand48_r (seedval, buffer) + long seedval; + struct drand48_data *buffer; +{ + /* Be generous for the arguments, detect some errors. */ + if (buffer == NULL) + { + errno = EFAULT; + return -1; + } + + /* The standards say we only have 32 bits. */ + if (sizeof (long) > 4) + seedval &= 0xffffffffl; + + if (sizeof (unsigned short int) == 2) + { + buffer->X[2] = seedval >> 16; + buffer->X[1] = seedval & 0xffffl; + buffer->X[0] = 0x330e; + } + else + { + buffer->X[2] = seedval; + buffer->X[1] = 0x330e0000; + buffer->X[0] = 0; + } + + return 0; +} |