21 lines
346 B
C
21 lines
346 B
C
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#include <random.h>
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#include <sys.h>
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RandGen randinit();
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int64_t randnext(RandGen *g);
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RandGen randinit() {
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RandGen g;
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g.seed = utime();
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return g;
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}
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int64_t randnext(RandGen *g) {
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int64_t ret = g->seed;
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ret = 0x5DEECE66D * ret + 0xB;
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ret &= 0xffffffffffff;
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g->seed = ret;
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ret = ret ^ (ret >> 16) ^ (ret >> 32);
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return ret;
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}
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