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-/* -*- c-basic-offset: 4; indent-tabs-mode: nil -*- */
-/* ====================================================================
- * Copyright (c) 1999-2004 Carnegie Mellon University. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * This work was supported in part by funding from the Defense Advanced
- * Research Projects Agency and the National Science Foundation of the
- * United States of America, and the CMU Sphinx Speech Consortium.
- *
- * THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND
- * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY
- * NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * ====================================================================
- *
- */
-/*
- A C-program for MT19937, with initialization improved 2002/1/26.
- Coded by Takuji Nishimura and Makoto Matsumoto.
-
- Before using, initialize the state by using init_genrand(seed)
- or init_by_array(init_key, key_length).
-
- Copyright (C) 1997 - 2002, Makoto Matsumoto and Takuji Nishimura,
- All rights reserved.
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions
- are met:
-
- 1. Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
-
- 2. Redistributions in binary form must reproduce the above copyright
-` notice, this list of conditions and the following disclaimer in the
- documentation and/or other materials provided with the distribution.
-
- 3. The names of its contributors may not be used to endorse or promote
- products derived from this software without specific prior written
- permission.
-
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
- Any feedback is very welcome.
- http://www.math.keio.ac.jp/matumoto/emt.html
- email: matumoto@math.keio.ac.jp
-*/
-
-
-/*
- * randgen.c : a portable random generator
- *
- *
- * **********************************************
- * CMU ARPA Speech Project
- *
- * Copyright (c) 1999 Carnegie Mellon University.
- * ALL RIGHTS RESERVED.
- * **********************************************
- *
- * HISTORY
- * $Log: genrand.c,v $
- * Revision 1.2 2005/06/22 03:01:50 arthchan2003
- * Added keyword
- *
- * Revision 1.3 2005/03/30 01:22:48 archan
- * Fixed mistakes in last updates. Add
- *
- *
- * 18-Nov-04 ARCHAN (archan@cs.cmu.edu) at Carnegie Mellon University
- * First incorporated from the Mersenne Twister Random
- * Number Generator package. It was chosen because it is
- * in BSD-license and its performance is quite
- * reasonable. Of course if you look at the inventors's
- * page. This random generator can actually gives
- * 19937-bits period. This is already far from we need.
- * This will possibly good enough for the next 10 years.
- *
- * I also downgrade the code a little bit to avoid Sphinx's
- * developers misused it.
- */
-
-
-
-#include <stdio.h>
-
-#include "sphinxbase/genrand.h"
-
-/* Period parameters */
-#define N 624
-#define M 397
-#define MATRIX_A 0x9908b0dfUL /* constant vector a */
-#define UPPER_MASK 0x80000000UL /* most significant w-r bits */
-#define LOWER_MASK 0x7fffffffUL /* least significant r bits */
-
-void init_genrand(unsigned long s);
-
-void
-genrand_seed(unsigned long s)
-{
- init_genrand(s);
-}
-
-
-static unsigned long mt[N]; /* the array for the state vector */
-static int mti = N + 1; /* mti==N+1 means mt[N] is not initialized */
-
-/* initializes mt[N] with a seed */
-void
-init_genrand(unsigned long s)
-{
- mt[0] = s & 0xffffffffUL;
- for (mti = 1; mti < N; mti++) {
- mt[mti] =
- (1812433253UL * (mt[mti - 1] ^ (mt[mti - 1] >> 30)) + mti);
- /* See Knuth TAOCP Vol2. 3rd Ed. P.106 for multiplier. */
- /* In the previous versions, MSBs of the seed affect */
- /* only MSBs of the array mt[]. */
- /* 2002/01/09 modified by Makoto Matsumoto */
- mt[mti] &= 0xffffffffUL;
- /* for >32 bit machines */
- }
-}
-
-/* generates a random number on [0,0xffffffff]-interval */
-unsigned long
-genrand_int32(void)
-{
- unsigned long y;
- static unsigned long mag01[2] = { 0x0UL, MATRIX_A };
- /* mag01[x] = x * MATRIX_A for x=0,1 */
-
- if (mti >= N) { /* generate N words at one time */
- int kk;
-
- if (mti == N + 1) /* if init_genrand() has not been called, */
- init_genrand(5489UL); /* a default initial seed is used */
-
- for (kk = 0; kk < N - M; kk++) {
- y = (mt[kk] & UPPER_MASK) | (mt[kk + 1] & LOWER_MASK);
- mt[kk] = mt[kk + M] ^ (y >> 1) ^ mag01[y & 0x1UL];
- }
- for (; kk < N - 1; kk++) {
- y = (mt[kk] & UPPER_MASK) | (mt[kk + 1] & LOWER_MASK);
- mt[kk] = mt[kk + (M - N)] ^ (y >> 1) ^ mag01[y & 0x1UL];
- }
- y = (mt[N - 1] & UPPER_MASK) | (mt[0] & LOWER_MASK);
- mt[N - 1] = mt[M - 1] ^ (y >> 1) ^ mag01[y & 0x1UL];
-
- mti = 0;
- }
-
- y = mt[mti++];
-
- /* Tempering */
- y ^= (y >> 11);
- y ^= (y << 7) & 0x9d2c5680UL;
- y ^= (y << 15) & 0xefc60000UL;
- y ^= (y >> 18);
-
- return y;
-}
-
-/* generates a random number on [0,0x7fffffff]-interval */
-long
-genrand_int31(void)
-{
- return (long) (genrand_int32() >> 1);
-}
-
-/* generates a random number on [0,1]-real-interval */
-double
-genrand_real1(void)
-{
- return genrand_int32() * (1.0 / 4294967295.0);
- /* divided by 2^32-1 */
-}
-
-/* generates a random number on [0,1)-real-interval */
-double
-genrand_real2(void)
-{
- return genrand_int32() * (1.0 / 4294967296.0);
- /* divided by 2^32 */
-}
-
-/* generates a random number on (0,1)-real-interval */
-double
-genrand_real3(void)
-{
- return (((double) genrand_int32()) + 0.5) * (1.0 / 4294967296.0);
- /* divided by 2^32 */
-}
-
-/* generates a random number on [0,1) with 53-bit resolution*/
-double
-genrand_res53(void)
-{
- unsigned long a = genrand_int32() >> 5, b = genrand_int32() >> 6;
- return (a * 67108864.0 + b) * (1.0 / 9007199254740992.0);
-}
-
-/* These real versions are due to Isaku Wada, 2002/01/09 added */
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