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author | Gwenolé Beauchesne <gbeauchesne@mandriva.org> | 2003-02-18 16:48:11 +0000 |
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committer | Gwenolé Beauchesne <gbeauchesne@mandriva.org> | 2003-02-18 16:48:11 +0000 |
commit | 8182e7cfe7d9c60567e48b876282594395062530 (patch) | |
tree | bb743948c6e926539b030102b804b5708222e8d4 /mdk-stage1/dietlibc/lib/rand_r.c | |
parent | c93f95560d3fde9eaefcc62c454c67b8b5626fa7 (diff) | |
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Merge in CVS dietlibc 0.21 for IA-64 and X86-64 support. However, drop the
following architectures we currently don't support: arm, mips, mipsel, parisc,
s390, sparc64.
Diffstat (limited to 'mdk-stage1/dietlibc/lib/rand_r.c')
-rw-r--r-- | mdk-stage1/dietlibc/lib/rand_r.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/lib/rand_r.c b/mdk-stage1/dietlibc/lib/rand_r.c new file mode 100644 index 000000000..55f8303bc --- /dev/null +++ b/mdk-stage1/dietlibc/lib/rand_r.c @@ -0,0 +1,30 @@ +/* + Copyright (C) 2002 Luc Van Oostenryck + + This is free software. You can redistribute and + modify it under the terms of the GNU General Public + Public License. +*/ + +#include <stdlib.h> +#include <stdint.h> + +/* Knuth's TAOCP section 3.6 */ +#define M ((1U<<31) -1) +#define A 48271 +#define Q 44488 // M/A +#define R 3399 // M%A; R < Q !!! + +// FIXME: ISO C/SuS want a longer period + +int rand_r(unsigned int* seed) +{ int32_t X; + + X = *seed; + X = A*(X%Q) - R * (int32_t) (X/Q); + if (X < 0) + X += M; + + *seed = X; + return X; +} |