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prng: make rand_r have 2^32 period instead of 2^31

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this is a minor fix to increase the period of the obsolete rand_r a bit.
an include header in __rand48_step.c is fixed as well.
This commit is contained in:
Szabolcs Nagy 2013-06-08 13:49:12 +00:00
commit 0996faa3d7
2 changed files with 2 additions and 2 deletions
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2
src/prng/__rand48_step.c
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@ -1,5 +1,5 @@
#include <stdlib.h> #include <stdlib.h>
#include <inttypes.h> #include <stdint.h>
uint64_t __rand48_step(unsigned short *xi, unsigned short *lc) uint64_t __rand48_step(unsigned short *xi, unsigned short *lc)
{ {

2
src/prng/rand_r.c
View file

@ -2,5 +2,5 @@
int rand_r(unsigned *seed) int rand_r(unsigned *seed)
{ {
return (*seed = *seed * 1103515245 + 12345) & 0x7fffffff; return (*seed = *seed * 1103515245 + 12345)/2;
} }