diff options
| author | Gwenolé Beauchesne <gbeauchesne@mandriva.org> | 2003-06-04 18:44:09 +0000 |
|---|---|---|
| committer | Gwenolé Beauchesne <gbeauchesne@mandriva.org> | 2003-06-04 18:44:09 +0000 |
| commit | 4cd6a4a5d7e49d54d53dcf4a6f3393d50bd88e8b (patch) | |
| tree | acd4001a266a8713495af7f1b2102b61e67113b0 /mdk-stage1/dietlibc/lib/rand_r.c | |
| parent | 71b111ec6c4671667a19c6fbe0023d33422535d7 (diff) | |
| download | drakx-4cd6a4a5d7e49d54d53dcf4a6f3393d50bd88e8b.tar drakx-4cd6a4a5d7e49d54d53dcf4a6f3393d50bd88e8b.tar.gz drakx-4cd6a4a5d7e49d54d53dcf4a6f3393d50bd88e8b.tar.bz2 drakx-4cd6a4a5d7e49d54d53dcf4a6f3393d50bd88e8b.tar.xz drakx-4cd6a4a5d7e49d54d53dcf4a6f3393d50bd88e8b.zip | |
Import dietlibc 0.22 + other fixes for AMD64
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; +} |