diff options
author | pommicket <pommicket@gmail.com> | 2022-02-20 13:18:21 -0800 |
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committer | pommicket <pommicket@gmail.com> | 2022-02-20 13:18:21 -0800 |
commit | 9bc8a11afeed3569736b89754012e3ca22ee10f6 (patch) | |
tree | 5f0ec0d5c05f879b1ee86adfa654ed3ef2178d5f /05/musl-0.6.0/src/prng/drand48.c | |
parent | 0f97a589b800bdb71dda05984192f0f66a52edaa (diff) |
conclusion
Diffstat (limited to '05/musl-0.6.0/src/prng/drand48.c')
-rw-r--r-- | 05/musl-0.6.0/src/prng/drand48.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/05/musl-0.6.0/src/prng/drand48.c b/05/musl-0.6.0/src/prng/drand48.c new file mode 100644 index 0000000..d808353 --- /dev/null +++ b/05/musl-0.6.0/src/prng/drand48.c @@ -0,0 +1,19 @@ +#include <stdlib.h> +#include <inttypes.h> + +uint64_t __rand48_step(unsigned short *xi, unsigned short *lc); +extern unsigned short __seed48[7]; + +double erand48(unsigned short s[3]) +{ + union { + uint64_t u; + double f; + } x = { 0x3ff0000000000000ULL | __rand48_step(s, __seed48+3)<<4 }; + return x.f - 1.0; +} + +double drand48(void) +{ + return erand48(__seed48); +} |