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diff --git a/web/server/h2o/libh2o/deps/mruby/mrbgems/mruby-random/src/mt19937ar.h b/web/server/h2o/libh2o/deps/mruby/mrbgems/mruby-random/src/mt19937ar.h
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+++ b/web/server/h2o/libh2o/deps/mruby/mrbgems/mruby-random/src/mt19937ar.h
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+/*
+** mt19937ar.h - MT Random functions
+**
+** Copyright (C) 1997 - 2016, Makoto Matsumoto and Takuji Nishimura,
+** All rights reserved.
+**
+** Permission is hereby granted, free of charge, to any person obtaining
+** a copy of this software and associated documentation files (the
+** "Software"), to deal in the Software without restriction, including
+** without limitation the rights to use, copy, modify, merge, publish,
+** distribute, sublicense, and/or sell copies of the Software, and to
+** permit persons to whom the Software is furnished to do so, subject to
+** the following conditions:
+**
+** The above copyright notice and this permission notice shall be
+** included in all copies or substantial portions of the Software.
+**
+** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+** SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+**
+** [ MIT license: http://www.opensource.org/licenses/mit-license.php ]
+**
+** 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)
+**
+** This version is modified by mruby developers. If you see any problem,
+** contact us first at https://github.com/mruby/mruby/issues
+*/
+
+#define N 624
+
+typedef struct {
+  unsigned long mt[N];
+  int mti;
+  union {
+    unsigned long int_;
+    double double_;
+  } gen;
+
+  mrb_int seed;
+  mrb_bool has_seed : 1;
+} mt_state;
+
+void mrb_random_init_genrand(mt_state *, unsigned long);
+unsigned long mrb_random_genrand_int32(mt_state *);
+double mrb_random_genrand_real1(mt_state *t);
+
+/* 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);