Add mruby-random mrbgem (no activation though)

4 files changed, 399 insertions, 0 deletions

diff --git a/mrbgems/mruby-random/src/mt19937ar.c b/mrbgems/mruby-random/src/mt19937ar.c
new file mode 100644
index 000000000..211aefde9
--- /dev/null
+++ b/mrbgems/mruby-random/src/mt19937ar.c
@@ -0,0 +1,175 @@
+/* 
+   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.                          
+   Copyright (C) 2005, Mutsuo Saito,
+   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)
+*/
+
+#include <stdio.h>
+#include "mt19937ar.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 */
+
+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 */
+    }
+}
+
+/* initialize by an array with array-length */
+/* init_key is the array for initializing keys */
+/* key_length is its length */
+/* slight change for C++, 2004/2/26 */
+void init_by_array(unsigned long init_key[], int key_length)
+{
+    int i, j, k;
+    init_genrand(19650218UL);
+    i=1; j=0;
+    k = (N>key_length ? N : key_length);
+    for (; k; k--) {
+        mt[i] = (mt[i] ^ ((mt[i-1] ^ (mt[i-1] >> 30)) * 1664525UL))
+          + init_key[j] + j; /* non linear */
+        mt[i] &= 0xffffffffUL; /* for WORDSIZE > 32 machines */
+        i++; j++;
+        if (i>=N) { mt[0] = mt[N-1]; i=1; }
+        if (j>=key_length) j=0;
+    }
+    for (k=N-1; k; k--) {
+        mt[i] = (mt[i] ^ ((mt[i-1] ^ (mt[i-1] >> 30)) * 1566083941UL))
+          - i; /* non linear */
+        mt[i] &= 0xffffffffUL; /* for WORDSIZE > 32 machines */
+        i++;
+        if (i>=N) { mt[0] = mt[N-1]; i=1; }
+    }
+
+    mt[0] = 0x80000000UL; /* MSB is 1; assuring non-zero initial array */ 
+}
+
+/* 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 */
diff --git a/mrbgems/mruby-random/src/mt19937ar.h b/mrbgems/mruby-random/src/mt19937ar.h
new file mode 100644
index 000000000..8b98b8a5b
--- /dev/null
+++ b/mrbgems/mruby-random/src/mt19937ar.h
@@ -0,0 +1,72 @@
+/* 
+   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.
+   Copyright (C) 2005, Mutsuo Saito
+   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)
+*/
+
+/* initializes mt[N] with a seed */
+void init_genrand(unsigned long s);
+
+/* initialize by an array with array-length */
+/* init_key is the array for initializing keys */
+/* key_length is its length */
+/* slight change for C++, 2004/2/26 */
+void init_by_array(unsigned long init_key[], int key_length);
+
+/* generates a random number on [0,0xffffffff]-interval */
+unsigned long genrand_int32(void);
+
+/* generates a random number on [0,0x7fffffff]-interval */
+long genrand_int31(void);
+
+/* These real versions are due to Isaku Wada, 2002/01/09 added */
+/* generates a random number on [0,1]-real-interval */
+double genrand_real1(void);
+
+/* generates a random number on [0,1)-real-interval */
+double genrand_real2(void);
+
+/* generates a random number on (0,1)-real-interval */
+double genrand_real3(void);
+
+/* generates a random number on [0,1) with 53-bit resolution*/
+double genrand_res53(void);
diff --git a/mrbgems/mruby-random/src/random.c b/mrbgems/mruby-random/src/random.c
new file mode 100644
index 000000000..9b5858a76
--- /dev/null
+++ b/mrbgems/mruby-random/src/random.c
@@ -0,0 +1,140 @@
+/*
+** random.c - Random module
+**
+** See Copyright Notice in mruby.h
+*/
+
+#include "mruby.h"
+#include "mruby/variable.h"
+#include "mt19937ar.h"
+
+#include <time.h>
+
+#define RAND_SEED_KEY "$mrb_ext_rand_seed"
+ 
+void mt_srand(unsigned long seed)
+{
+  init_genrand(seed);
+}  
+
+unsigned long mt_rand()
+{
+  return genrand_int32();
+}  
+
+double mt_rand_real()
+{
+  return genrand_real1();
+}  
+
+mrb_value mrb_random_mt_srand(mrb_state *mrb, mrb_value seed)
+{ 
+  if (mrb_nil_p(seed)) {
+    seed = mrb_fixnum_value(time(NULL) + mt_rand());
+    if (mrb_fixnum(seed) < 0) {
+      seed = mrb_fixnum_value( 0 - mrb_fixnum(seed));
+    }
+  }
+
+  mt_srand((unsigned) mrb_fixnum(seed));
+
+  return seed;
+}
+
+mrb_value mrb_random_mt_rand(mrb_state *mrb, mrb_value max)
+{ 
+  mrb_value value;
+
+  if (mrb_fixnum(max) == 0) {
+    value = mrb_float_value(mt_rand_real());
+  } else {
+    value = mrb_fixnum_value(mt_rand() % mrb_fixnum(max));
+  }
+
+  return value;
+}
+
+static mrb_value mrb_random_rand(mrb_state *mrb, mrb_value self)
+{
+  mrb_value *argv;
+  mrb_int argc;
+  mrb_value max;
+
+  mrb_get_args(mrb, "*", &argv, &argc);
+
+  if (argc == 0) {
+    max = mrb_fixnum_value(0);
+  } else if (argc == 1) {
+    max = argv[0];
+    if (!mrb_nil_p(max) && !mrb_fixnum_p(max)) {
+      max = mrb_check_convert_type(mrb, max, MRB_TT_FIXNUM, "Fixnum", "to_int");
+    }
+    if (!mrb_nil_p(max) && mrb_fixnum(max) < 0) {
+      max = mrb_fixnum_value(0 - mrb_fixnum(max));
+    }
+
+    if (!mrb_fixnum_p(max)) {
+      mrb_raise(mrb, E_ARGUMENT_ERROR, "invalid argument type");
+      return mrb_nil_value();
+    }
+  } else {
+    mrb_raisef(mrb, E_ARGUMENT_ERROR, "wrong number of arguments (%d for 0..1)", argc);
+    return mrb_nil_value();
+  }
+
+  mrb_value seed = mrb_gv_get(mrb, mrb_intern(mrb, RAND_SEED_KEY));
+  if (mrb_nil_p(seed))
+    mrb_random_mt_srand(mrb, mrb_nil_value());
+
+  return mrb_random_mt_rand(mrb, max);
+}
+
+static mrb_value mrb_random_srand(mrb_state *mrb, mrb_value self)
+{
+  mrb_int argc;
+  mrb_value *argv;
+  mrb_value seed;
+
+  mrb_get_args(mrb, "*", &argv, &argc);
+
+  if (argc == 0) {
+    seed = mrb_nil_value();
+  } else if (argc == 1) {
+    seed = argv[0];
+    if (!mrb_nil_p(seed) && !mrb_fixnum_p(seed)) {
+      seed = mrb_check_convert_type(mrb, seed, MRB_TT_FIXNUM, "Fixnum", "to_int");
+    }
+     if (!mrb_nil_p(seed) && mrb_fixnum(seed) < 0) {
+      seed = mrb_fixnum_value(0 - mrb_fixnum(seed));
+    }
+
+    if (!mrb_fixnum_p(seed)) {
+      mrb_raise(mrb, E_ARGUMENT_ERROR, "invalid argument type");
+      return mrb_nil_value();
+    }
+  } else {
+    mrb_raisef(mrb, E_ARGUMENT_ERROR, "wrong number of arguments (%d for 0..1)", argc);
+    return mrb_nil_value();
+  }
+
+  seed = mrb_random_mt_srand(mrb, seed);
+  mrb_value old_seed = mrb_gv_get(mrb, mrb_intern(mrb, RAND_SEED_KEY));
+  mrb_gv_set(mrb, mrb_intern(mrb, RAND_SEED_KEY), seed);
+
+  return old_seed;
+}
+
+void mrb_mruby_random_gem_init(mrb_state *mrb)
+{
+  struct RClass *random;
+
+  random = mrb_define_module(mrb, "Random");
+
+  mrb_define_class_method(mrb, random, "rand", mrb_random_rand, ARGS_ANY());
+  mrb_define_class_method(mrb, random, "srand", mrb_random_srand, ARGS_ANY());
+}
+
+void mrb_mruby_random_gem_final(mrb_state *mrb)
+{
+}
+
diff --git a/mrbgems/mruby-random/src/random.h b/mrbgems/mruby-random/src/random.h
new file mode 100644
index 000000000..3dc5d4e77
--- /dev/null
+++ b/mrbgems/mruby-random/src/random.h
@@ -0,0 +1,12 @@
+/*
+// random.h - Random module
+//
+// See Copyright Notice in mruby.h
+*/
+
+#ifndef RANDOM_H
+#define RANDOM_H
+
+void mrb_mruby_random_gem_init(mrb_state *mrb);
+
+#endif