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authorHanspeter Portner <dev@open-music-kontrollers.ch>2018-01-14 09:12:46 +0100
committerHanspeter Portner <dev@open-music-kontrollers.ch>2018-01-14 09:12:46 +0100
commita3a1598f23fad78c92c70884696fe9988f079383 (patch)
tree0d889f00a86fcec300fd44994eb0aea9d841860d /mapper.lv2/test
parent0c438ba3e8b2cb8802440ff23c577f45b64be406 (diff)
parente8158f617e0ab86410fd62932488cd1810d44181 (diff)
downloadsynthpod-a3a1598f23fad78c92c70884696fe9988f079383.tar.xz
Merge commit 'e8158f617e0ab86410fd62932488cd1810d44181'
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diff --git a/mapper.lv2/test/random.c b/mapper.lv2/test/random.c
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+/*
+* random.c
+* Mersenne Twister random number generator
+* Luiz Henrique de Figueiredo <lhf@tecgraf.puc-rio.br>
+* 18 Nov 2010 19:10:52
+* slightly modified from mt19937ar.c available at
+* http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/MT2002/emt19937ar.html
+*/
+
+/*
+ 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.sci.hiroshima-u.ac.jp/~m-mat/MT/emt.html
+ email: m-mat @ math.sci.hiroshima-u.ac.jp (remove space)
+*/
+
+/* 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 */
+
+typedef struct {
+ unsigned long v[N]; /* the array for the state vector */
+ int i;
+} MT;
+
+#define mt (o->v)
+#define mti (o->i)
+
+/* initializes mt[N] with a seed */
+static void init_genrand(MT *o, 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 */
+static unsigned long genrand_int32(MT *o)
+{
+ 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(o,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;
+}
+
+/* These real versions are due to Isaku Wada, 2002/01/09 added */
+
+#ifdef GENRAND32
+/* generates a random number on [0,1)-real-interval */
+static double genrand_real2(MT *o)
+{
+ return genrand_int32(o)*(1.0/4294967296.0);
+ /* divided by 2^32 */
+}
+#define genrand genrand_real2
+#else
+/* generates a random number on [0,1) with 53-bit resolution*/
+static double genrand_res53(MT *o)
+{
+ unsigned long a=genrand_int32(o)>>5, b=genrand_int32(o)>>6;
+ return(a*67108864.0+b)*(1.0/9007199254740992.0);
+}
+#define genrand genrand_res53
+#endif
+
+#define AUTHOR "Mersenne Twister"