mirror of
https://github.com/sheumann/hush.git
synced 2024-06-28 14:29:51 +00:00
34 lines
741 B
C
34 lines
741 B
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* $RANDOM support.
|
|
*
|
|
* Copyright (C) 2009 Denys Vlasenko
|
|
*
|
|
* Licensed under GPLv2, see file LICENSE in this tarball for details.
|
|
*/
|
|
#ifndef SHELL_RANDOM_H
|
|
#define SHELL_RANDOM_H 1
|
|
|
|
PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
|
|
|
|
typedef struct random_t {
|
|
/* Random number generators */
|
|
int32_t galois_LFSR; /* Galois LFSR (fast but weak). signed! */
|
|
uint32_t LCG; /* LCG (fast but weak) */
|
|
} random_t;
|
|
|
|
#define UNINITED_RANDOM_T(rnd) \
|
|
((rnd)->galois_LFSR == 0)
|
|
|
|
#define INIT_RANDOM_T(rnd, nonzero, v) \
|
|
((rnd)->galois_LFSR = (nonzero), (rnd)->LCG = (v))
|
|
|
|
#define CLEAR_RANDOM_T(rnd) \
|
|
((rnd)->galois_LFSR = 0)
|
|
|
|
uint32_t next_random(random_t *rnd) FAST_FUNC;
|
|
|
|
POP_SAVED_FUNCTION_VISIBILITY
|
|
|
|
#endif
|