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long policy

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@5946 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jean-Philippe Bernardy 2005-02-15 11:13:00 +00:00
parent 74f941e75c
commit a161ef490f
1 changed files with 9 additions and 9 deletions
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18
firmware/common/random.c
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@ -56,11 +56,11 @@
#define mixBits(u, v) (hiBit(u)|loBits(v)) /* move highest bit of u to #define mixBits(u, v) (hiBit(u)|loBits(v)) /* move highest bit of u to
highest bit of v */ highest bit of v */
static unsigned int state[N+1]; /* state vector + 1 to not violate ANSI C */ static unsigned long state[N+1]; /* state vector + 1 to not violate ANSI C */
static unsigned int *next; /* next random value is computed from here */ static unsigned long *next; /* next random value is computed from here */
static int left = -1; /* can *next++ this many times before reloading */ static int left = -1; /* can *next++ this many times before reloading */
void srand(unsigned int seed) void srand(unsigned long seed)
{ {
/* /*
* We initialize state[0..(N-1)] via the generator * We initialize state[0..(N-1)] via the generator
@ -108,16 +108,16 @@ void srand(unsigned int seed)
* so-- that's why the only change I made is to restrict to odd seeds. * so-- that's why the only change I made is to restrict to odd seeds.
*/ */
unsigned int x = (seed | 1U) & 0xFFFFFFFFU, *s = state; unsigned long x = (seed | 1U) & 0xFFFFFFFFU, *s = state;
int j; int j;
for(left=0, *s++=x, j=N; --j; for(left=0, *s++=x, j=N; --j;
*s++ = (x*=69069U) & 0xFFFFFFFFU); *s++ = (x*=69069U) & 0xFFFFFFFFU);
} }
static int rand_reload(void) static long rand_reload(void)
{ {
unsigned int *p0=state, *p2=state+2, *pM=state+M, s0, s1; unsigned long *p0=state, *p2=state+2, *pM=state+M, s0, s1;
int j; int j;
if(left < -1) if(left < -1)
@ -135,12 +135,12 @@ static int rand_reload(void)
s1 ^= (s1 >> 11); s1 ^= (s1 >> 11);
s1 ^= (s1 << 7) & 0x9D2C5680U; s1 ^= (s1 << 7) & 0x9D2C5680U;
s1 ^= (s1 << 15) & 0xEFC60000U; s1 ^= (s1 << 15) & 0xEFC60000U;
return (int)s1 ^ (s1 >> 18); return (long)s1 ^ (s1 >> 18);
} }
int rand(void) long rand(void)
{ {
unsigned int y; unsigned long y;
if(--left < 0) { if(--left < 0) {
y = rand_reload(); y = rand_reload();