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    1 /*
    2    C++ functions for MT19937, with initialization improved 2002/2/10.
    3    Coded by Takuji Nishimura and Makoto Matsumoto.
    4    This is a faster version by taking Shawn Cokus's optimization,
    5    Matthe Bellew's simplification, Isaku Wada's real version.
    6 
    7    Before using, initialize the state by using init_genrand(seed)
    8    or init_by_array(init_key, key_length).
    9 
   10    Copyright (C) 1997 - 2002, Makoto Matsumoto and Takuji Nishimura,
   11    All rights reserved.
   12 
   13    Redistribution and use in source and binary forms, with or without
   14    modification, are permitted provided that the following conditions
   15    are met:
   16 
   17      1. Redistributions of source code must retain the above copyright
   18         notice, this list of conditions and the following disclaimer.
   19 
   20      2. Redistributions in binary form must reproduce the above copyright
   21         notice, this list of conditions and the following disclaimer in the
   22         documentation and/or other materials provided with the distribution.
   23 
   24      3. The names of its contributors may not be used to endorse or promote
   25         products derived from this software without specific prior written
   26         permission.
   27 
   28    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   29    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   30    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   31    A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
   32    CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   33    EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   34    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   35    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   36    LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   37    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   38    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   39 
   40    Any feedback is very welcome.
   41    http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/emt.html
   42    email: m-mat@math.sci.hiroshima-u.ac.jp
   43 */
   44 
   45 #ifndef MT19937_INCLUDED
   46 #define MT19937_INCLUDED
   47 
   48 // initializes state[N] with a seed
   49 void init_genrand(unsigned long s);
   50 
   51 /* initialize by an array with array-length
   52  * init_key is the array for initializing keys
   53  * key_length is its length */
   54 //void init_by_array(unsigned long init_key[], unsigned long key_length);
   55 
   56 // generates a random number on [0,0x7fffffff]-interval
   57 long genrand_int31(void);
   58 
   59 // generates a random number on [0,0xffffffff]-interval
   60 unsigned long genrand_int32(void);
   61 
   62 // generates a random number on [0,1]-real-interval
   63 double genrand_real1(void);
   64 
   65 // generates a random number on [0,1)-real-interval
   66 //double genrand_real2(void);
   67 
   68 // generates a random number on (0,1)-real-interval
   69 //double genrand_real3(void);
   70 
   71 // generates a random number on [0,1) with 53-bit resolution
   72 //double genrand_res53(void);
   73 
   74 // These real versions are due to Isaku Wada, 2002/01/09 added */
   75 
   76 #endif
   77