diff options
Diffstat (limited to 'stdlib/drand48-iter.c')
-rw-r--r-- | stdlib/drand48-iter.c | 56 |
1 files changed, 0 insertions, 56 deletions
diff --git a/stdlib/drand48-iter.c b/stdlib/drand48-iter.c deleted file mode 100644 index f59c803138..0000000000 --- a/stdlib/drand48-iter.c +++ /dev/null @@ -1,56 +0,0 @@ -/* Copyright (C) 1995-2017 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 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. - - 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. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -#include <errno.h> -#include <stdlib.h> -#include <limits.h> -#include <stdint.h> -#include <sys/types.h> - -/* Global state for non-reentrant functions. */ -struct drand48_data __libc_drand48_data; - - -int -__drand48_iterate (unsigned short int xsubi[3], struct drand48_data *buffer) -{ - uint64_t X; - uint64_t result; - - /* Initialize buffer, if not yet done. */ - if (__glibc_unlikely (!buffer->__init)) - { - buffer->__a = 0x5deece66dull; - 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. */ - - X = (uint64_t) xsubi[2] << 32 | (uint32_t) xsubi[1] << 16 | xsubi[0]; - - result = X * buffer->__a + buffer->__c; - - xsubi[0] = result & 0xffff; - xsubi[1] = (result >> 16) & 0xffff; - xsubi[2] = (result >> 32) & 0xffff; - - return 0; -} |