Annotation of /trunk/mkinitrd-magellan/busybox/shell/random.h
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Revision 984 -
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Sun May 30 11:32:42 2010 UTC (14 years ago) by niro
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Sun May 30 11:32:42 2010 UTC (14 years ago) by niro
File MIME type: text/plain
File size: 741 byte(s)
-updated to busybox-1.16.1 and enabled blkid/uuid support in default config
1 | niro | 984 | /* vi: set sw=4 ts=4: */ |
2 | /* | ||
3 | * $RANDOM support. | ||
4 | * | ||
5 | * Copyright (C) 2009 Denys Vlasenko | ||
6 | * | ||
7 | * Licensed under GPLv2, see file LICENSE in this tarball for details. | ||
8 | */ | ||
9 | #ifndef SHELL_RANDOM_H | ||
10 | #define SHELL_RANDOM_H 1 | ||
11 | |||
12 | PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN | ||
13 | |||
14 | typedef struct random_t { | ||
15 | /* Random number generators */ | ||
16 | int32_t galois_LFSR; /* Galois LFSR (fast but weak). signed! */ | ||
17 | uint32_t LCG; /* LCG (fast but weak) */ | ||
18 | } random_t; | ||
19 | |||
20 | #define UNINITED_RANDOM_T(rnd) \ | ||
21 | ((rnd)->galois_LFSR == 0) | ||
22 | |||
23 | #define INIT_RANDOM_T(rnd, nonzero, v) \ | ||
24 | ((rnd)->galois_LFSR = (nonzero), (rnd)->LCG = (v)) | ||
25 | |||
26 | #define CLEAR_RANDOM_T(rnd) \ | ||
27 | ((rnd)->galois_LFSR = 0) | ||
28 | |||
29 | uint32_t next_random(random_t *rnd) FAST_FUNC; | ||
30 | |||
31 | POP_SAVED_FUNCTION_VISIBILITY | ||
32 | |||
33 | #endif |