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software/libbase: srand and RAND_MAX

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This commit is contained in:
Sebastien Bourdeauducq 2012-05-25 18:57:23 +02:00
parent 88a909e86c
commit 8e0461121f
2 changed files with 11 additions and 3 deletions
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3
software/include/base/stdlib.h
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@ -49,7 +49,10 @@ char *number(char *buf, char *end, unsigned long num, int base, int size, int pr
long strtol(const char *nptr, char **endptr, int base);
float atof(const char *s);
#define RAND_MAX 2147483647
unsigned int rand(void);
void srand(unsigned int seed);
void abort(void);
#endif /* __STDLIB_H */

11
software/libbase/libc.c
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@ -563,11 +563,16 @@ int sprintf(char * buf, const char *fmt, ...)
* rand - Returns a pseudo random number
*/
static unsigned int seed;
static unsigned int randseed;
unsigned int rand(void)
{
seed = 129 * seed + 907633385;
return seed;
randseed = 129 * randseed + 907633385;
return randseed;
}
void srand(unsigned int seed)
{
randseed = seed;
}
void abort(void)