diff options
Diffstat (limited to 'newlib/libc/stdlib/rand.c')
| -rw-r--r-- | newlib/libc/stdlib/rand.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/newlib/libc/stdlib/rand.c b/newlib/libc/stdlib/rand.c index 131e5cf09..42acde4aa 100644 --- a/newlib/libc/stdlib/rand.c +++ b/newlib/libc/stdlib/rand.c @@ -72,20 +72,24 @@ on two different systems. void _DEFUN (srand, (seed), unsigned int seed) { - _REENT_CHECK_RAND48(_REENT); - _REENT_RAND_NEXT(_REENT) = seed; + struct _reent *reent = _REENT; + + _REENT_CHECK_RAND48(reent); + _REENT_RAND_NEXT(reent) = seed; } int _DEFUN_VOID (rand) { + struct _reent *reent = _REENT; + /* This multiplier was obtained from Knuth, D.E., "The Art of Computer Programming," Vol 2, Seminumerical Algorithms, Third Edition, Addison-Wesley, 1998, p. 106 (line 26) & p. 108 */ - _REENT_CHECK_RAND48(_REENT); - _REENT_RAND_NEXT(_REENT) = - _REENT_RAND_NEXT(_REENT) * __extension__ 6364136223846793005LL + 1; - return (int)((_REENT_RAND_NEXT(_REENT) >> 32) & RAND_MAX); + _REENT_CHECK_RAND48(reent); + _REENT_RAND_NEXT(reent) = + _REENT_RAND_NEXT(reent) * __extension__ 6364136223846793005LL + 1; + return (int)((_REENT_RAND_NEXT(reent) >> 32) & RAND_MAX); } #endif /* _REENT_ONLY */ |