Initial Commit / Linux Combined Proof of Concept example

deps_linux/libtcod/random.h

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+/* BSD 3-Clause License
+ *
+ * Copyright © 2008-2022, Jice and the libtcod contributors.
+ * 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. Neither the name of the copyright holder nor the names of its
+ *    contributors may 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 HOLDER 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.
+ */
+#ifndef LIBTCOD_RANDOM_H_
+#define LIBTCOD_RANDOM_H_
+#include <stdint.h>
+
+#include "config.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif  // __cplusplus
+/**
+    Return the next random uint64_t from a SplitMix64 generator.
+
+    `state[1]` is a non-NULL pointer to the internal state of the generator.
+    There is no initializer function because the first value of `state[1]` is
+    itself the seed which can start at any value.
+    `state[1]` will be updated by this call.
+
+    This function is provisional and may change.
+ */
+static inline uint64_t TCOD_rng_splitmix64_next(uint64_t* state) {
+  // Based on http://xoshiro.di.unimi.it/splitmix64.c
+  uint64_t z = (*state += 0x9e3779b97f4a7c15);
+  z = (z ^ (z >> 30)) * 0xbf58476d1ce4e5b9;
+  z = (z ^ (z >> 27)) * 0x94d049bb133111eb;
+  return z ^ (z >> 31);
+}
+#ifdef __cplusplus
+}  // extern "C"
+#endif  // __cplusplus
+#endif  // LIBTCOD_RANDOM_H_