Last change
on this file since 3466 was 3320, checked in by Bruno Cornec, 10 years ago |
- Re-add (thanks git BTW) the 2.2.9 branch which had been destroyed in
the move to 3.0
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-
Property svn:eol-style
set to
native
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File size:
733 bytes
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1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * $RANDOM support.
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4 | *
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5 | * Copyright (C) 2009 Denys Vlasenko
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6 | *
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7 | * Licensed under GPLv2, see file LICENSE in this source tree.
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8 | */
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9 | #ifndef SHELL_RANDOM_H
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10 | #define SHELL_RANDOM_H 1
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11 |
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12 | PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
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13 |
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14 | typedef struct random_t {
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15 | /* Random number generators */
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16 | int32_t galois_LFSR; /* Galois LFSR (fast but weak). signed! */
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17 | uint32_t LCG; /* LCG (fast but weak) */
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18 | } random_t;
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19 |
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20 | #define UNINITED_RANDOM_T(rnd) \
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21 | ((rnd)->galois_LFSR == 0)
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22 |
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23 | #define INIT_RANDOM_T(rnd, nonzero, v) \
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24 | ((rnd)->galois_LFSR = (nonzero), (rnd)->LCG = (v))
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25 |
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26 | #define CLEAR_RANDOM_T(rnd) \
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27 | ((rnd)->galois_LFSR = 0)
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28 |
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29 | uint32_t next_random(random_t *rnd) FAST_FUNC;
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30 |
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31 | POP_SAVED_FUNCTION_VISIBILITY
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32 |
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33 | #endif
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