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Compensate for insufficient RAND_MAX values.

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Inuyasha 2016-03-27 15:57:50 -07:00
parent ac03ce39c8
commit a3e940fe65
1 changed files with 7 additions and 1 deletions
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8
src/m_random.c
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@ -32,7 +32,13 @@
*/ */
fixed_t M_RandomFixed(void) fixed_t M_RandomFixed(void)
{ {
#if RAND_MAX < 65535
// Compensate for insufficient randomness.
fixed_t rndv = (rand()&1)<<15;
return rand()^rndv;
#else
return (rand() & 0xFFFF); return (rand() & 0xFFFF);
#endif
} }
/** Provides a random byte. Distribution is uniform. /** Provides a random byte. Distribution is uniform.
@ -246,5 +252,5 @@ void P_SetRandSeedD(const char *rfile, INT32 rline, UINT32 seed)
*/ */
UINT32 M_RandomizedSeed(void) UINT32 M_RandomizedSeed(void)
{ {
return ((totalplaytime & 0xFFFF) << 16)|(rand() & 0xFFFF); return ((totalplaytime & 0xFFFF) << 16)|M_RandomFixed();
} }