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@@ -1,96 +0,0 @@
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-/*
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- A C-program for MT19937, with initialization improved 2002/1/26.
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- Coded by Takuji Nishimura and Makoto Matsumoto.
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-
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- Before using, initialize the state by using init_genrand(seed)
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- or init_by_array(init_key, key_length).
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-
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- Copyright (C) 1997 - 2002, Makoto Matsumoto and Takuji Nishimura,
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- All rights reserved.
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-
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- Redistribution and use in source and binary forms, with or without
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- modification, are permitted provided that the following conditions
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- are met:
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-
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- 1. Redistributions of source code must retain the above copyright
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- notice, this list of conditions and the following disclaimer.
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-
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- 2. Redistributions in binary form must reproduce the above copyright
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- notice, this list of conditions and the following disclaimer in the
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- documentation and/or other materials provided with the distribution.
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-
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- 3. The names of its contributors may not be used to endorse or promote
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- products derived from this software without specific prior written
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- permission.
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-
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- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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- CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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-
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-
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- Any feedback is very welcome.
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- http://www.math.keio.ac.jp/matumoto/emt.html
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- email: [email protected]
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-*/
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-
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-#include "mersenne.h"
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-#include <stdio.h>
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-
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-/* initializes mt[N] with a seed */
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-Mersenne::
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-Mersenne(unsigned long seed) {
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- mt[0]= seed & 0xffffffffUL;
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- for (mti=1; mti<N; mti++) {
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- mt[mti] =
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- (1812433253UL * (mt[mti-1] ^ (mt[mti-1] >> 30)) + mti);
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- /* See Knuth TAOCP Vol2. 3rd Ed. P.106 for multiplier. */
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- /* In the previous versions, MSBs of the seed affect */
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- /* only MSBs of the array mt[]. */
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- /* 2002/01/09 modified by Makoto Matsumoto */
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- mt[mti] &= 0xffffffffUL;
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- /* for >32 bit machines */
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- }
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-}
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-
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-/* generates a random number on [0,0x7fffffff]-interval */
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-unsigned long Mersenne::
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-get_uint31() {
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- unsigned long y;
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- static unsigned long mag01[2]={0x0UL, MATRIX_A};
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- /* mag01[x] = x * MATRIX_A for x=0,1 */
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-
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- if (mti >= N) { /* generate N words at one time */
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- int kk;
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-
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- for (kk=0;kk<N-M;kk++) {
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- y = (mt[kk]&UPPER_MASK)|(mt[kk+1]&LOWER_MASK);
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- mt[kk] = mt[kk+M] ^ (y >> 1) ^ mag01[y & 0x1UL];
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- }
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- for (;kk<N-1;kk++) {
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- y = (mt[kk]&UPPER_MASK)|(mt[kk+1]&LOWER_MASK);
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- mt[kk] = mt[kk+(M-N)] ^ (y >> 1) ^ mag01[y & 0x1UL];
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- }
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- y = (mt[N-1]&UPPER_MASK)|(mt[0]&LOWER_MASK);
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- mt[N-1] = mt[M-1] ^ (y >> 1) ^ mag01[y & 0x1UL];
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-
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- mti = 0;
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- }
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-
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- y = mt[mti++];
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-
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- /* Tempering */
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- y ^= (y >> 11);
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- y ^= (y << 7) & 0x9d2c5680UL;
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- y ^= (y << 15) & 0xefc60000UL;
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- y ^= (y >> 18);
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-
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- return y >> 1;
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-}
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David Rose