52 lines
1003 B
C
52 lines
1003 B
C
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#include <time.h>
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static unsigned long state[16] = {
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0x8C12D566, 0x00C2793E, 0x5016EECF, 0x234869FA,
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0x6E4C8852, 0x32574386, 0x3573DC34, 0x7E4C00F0,
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0xC830516B, 0x085437E9, 0x32478EAC, 0xDEFCDCD0,
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0xFE09BBC2, 0x34EA087D, 0x112F367C, 0x0324EFAA
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};
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static unsigned long index = 0;
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void winitseed(unsigned long seed)
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{
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int i;
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if ( !seed ) seed = (unsigned long)time(NULL);
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for (i=0; i<16; ++i)
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{
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state[i] ^= seed;
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}
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}
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static unsigned long WELLRNG512()
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{
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unsigned long a, b, c, d;
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a = state[index];
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c = state[(index+13) & 15];
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b = a ^ c ^(a << 16) ^ (c << 15);
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c = state[(index+9) & 15];
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c ^= (c >> 11);
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a = state[index] = b ^ c;
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d = a ^ ((a << 5) & 0xDA442D20UL);
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index = (index + 15) & 15;
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a = state[index];
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state[index] = a ^ b ^ d ^ (a << 2) ^ (b << 18) ^ (c << 28);
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return state[index];
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}
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unsigned long wrand(unsigned long max)
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{
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if(max == 0)
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return 0;
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return WELLRNG512() % max + 1;
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}
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//返回一个随机数
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unsigned long wrandvalue()
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{
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return WELLRNG512();
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}
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