diff options
Diffstat (limited to 'random_bytes.c')
-rw-r--r-- | random_bytes.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/random_bytes.c b/random_bytes.c new file mode 100644 index 0000000..cd7416f --- /dev/null +++ b/random_bytes.c @@ -0,0 +1,39 @@ +/* See LICENSE file for copyright and license details. */ +#include "common.h" +#ifndef TEST + + +void * +libsimple_random_bytes(uintmax_t (*rng)(size_t bits, void *user), void *user, void *buffer, size_t bytes) +{ + char *buf = buffer; + uintmax_t rnd; + + while (bytes >= sizeof(uintmax_t)) { + *(uintmax_t *)buf = (*rng)(sizeof(uintmax_t) * 8U, user); + bytes -= sizeof(uintmax_t); + buf = &buf[sizeof(uintmax_t)]; + } + + if (bytes) { + rnd = (*rng)(bytes * 8U, user); + while (bytes) { + *buf++ = (char)(rnd & 255U); + rnd >>= 8; + } + } + + return buf; +} + + +#else +#include "test.h" + +int +main(void) +{ + return 0; +} + +#endif |