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1 /*
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2 A C-program for MT19937, with initialization improved 2002/1/26.
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3 Coded by Takuji Nishimura and Makoto Matsumoto.
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4
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5 Before using, initialize the state by using init_genrand(seed)
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6 or init_by_array(init_key, key_length).
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7
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8 Copyright (C) 1997 - 2002, Makoto Matsumoto and Takuji Nishimura,
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9 All rights reserved.
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10 Copyright (C) 2005, Mutsuo Saito
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11 All rights reserved.
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12
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13 Redistribution and use in source and binary forms, with or without
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14 modification, are permitted provided that the following conditions
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15 are met:
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16
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17 1. Redistributions of source code must retain the above copyright
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18 notice, this list of conditions and the following disclaimer.
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19
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20 2. Redistributions in binary form must reproduce the above copyright
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21 notice, this list of conditions and the following disclaimer in the
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22 documentation and/or other materials provided with the distribution.
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23
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24 3. The names of its contributors may not be used to endorse or promote
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25 products derived from this software without specific prior written
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26 permission.
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27
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28 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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29 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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30 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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31 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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32 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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33 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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34 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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35 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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36 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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37 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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38 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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39
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40
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41 Any feedback is very welcome.
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42 http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/emt.html
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43 email: m-mat @ math.sci.hiroshima-u.ac.jp (remove space)
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44 */
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45
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46 /* initializes mt[N] with a seed */
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47 void init_genrand(unsigned long s);
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48
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49 /* initialize by an array with array-length */
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50 /* init_key is the array for initializing keys */
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51 /* key_length is its length */
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52 /* slight change for C++, 2004/2/26 */
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53 void init_by_array(unsigned long init_key[], int key_length);
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54
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55 /* generates a random number on [0,0xffffffff]-interval */
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56 unsigned long genrand_int32(void);
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57
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58 /* generates a random number on [0,0x7fffffff]-interval */
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59 long genrand_int31(void);
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60
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61 /* These real versions are due to Isaku Wada, 2002/01/09 added */
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62 /* generates a random number on [0,1]-real-interval */
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63 double genrand_real1(void);
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64
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65 /* generates a random number on [0,1)-real-interval */
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66 double genrand_real2(void);
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67
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68 /* generates a random number on (0,1)-real-interval */
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69 double genrand_real3(void);
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70
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71 /* generates a random number on [0,1) with 53-bit resolution*/
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72 double genrand_res53(void);
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