cosmopolitan/libc/stdio/lcg.internal.h
Justine Tunney fa20edc44d
Reduce header complexity
- Remove most __ASSEMBLER__ __LINKER__ ifdefs
- Rename libc/intrin/bits.h to libc/serialize.h
- Block pthread cancelation in fchmodat() polyfill
- Remove `clang-format off` statements in third_party
2023-11-28 14:39:42 -08:00

15 lines
499 B
C

#ifndef COSMOPOLITAN_LIBC_LCG_H_
#define COSMOPOLITAN_LIBC_LCG_H_
#ifdef _COSMO_SOURCE
forceinline uint64_t KnuthLinearCongruentialGenerator(uint64_t prev[1]) {
/* Knuth, D.E., "The Art of Computer Programming," Vol 2,
Seminumerical Algorithms, Third Edition, Addison-Wesley, 1998,
p. 106 (line 26) & p. 108 */
prev[0] = prev[0] * 6364136223846793005 + 1442695040888963407;
return prev[0]; /* be sure to shift! */
}
#endif /* _COSMO_SOURCE */
#endif /* COSMOPOLITAN_LIBC_LCG_H_ */