X-Git-Url: https://git.dogcows.com/gitweb?p=chaz%2Fyoink;a=blobdiff_plain;f=src%2Frandom.hh;fp=src%2Frandom.hh;h=5a342295776200c63c2979855478ad3cb0c2dc1d;hp=0000000000000000000000000000000000000000;hb=79b5f738f2e38acb60cda7e09f54802933a17105;hpb=a891a2dcbbb63d9e771da6efff00a33da614e737

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+
+/*******************************************************************************
+
+ Copyright (c) 2009, Charles McGarvey
+ All rights reserved.
+ 
+ Redistribution   and   use  in  source  and  binary  forms,  with  or  without
+ modification, are permitted provided that the following conditions are met:
+ 
+   * Redistributions  of  source  code  must retain the above copyright notice,
+     this list of conditions and the following disclaimer.
+   * 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  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 _RNG_RANDOM_HH_
+#define _RNG_RANDOM_HH_
+
+/**
+ * @file random.hh
+ * Simple pseudo-random number generators.
+ */
+
+
+namespace rng {
+
+/**
+ * Provide the RNG with a seed.
+ * @param theSeed
+ * @return theSeed
+ */
+
+unsigned seed(unsigned theSeed);
+
+/**
+ * Seed the RNG with the current time. This is good enough in most cases.
+ * @return The seed used.
+ */
+
+unsigned seed();
+
+
+/**
+ * The most generic generator gets enough random bits to fill the integer type.
+ * @return Random value of maximum domain for type T.
+ */
+
+template <typename T>
+T get();
+
+
+/**
+ * Get a random boolean value.
+ * @return True or false.
+ */
+
+template <>
+bool get<bool>();
+
+
+/**
+ * Get a random integer value with a limited domain.
+ * @param lower Smallest possible value.
+ * @param upper Largest possible value.
+ * @return Integer between lower and upper, inclusive.
+ */
+
+template <typename T>
+T get(T lower, T upper);
+
+
+/**
+ * Get a random float with a limited domain.
+ * @param lower Smallest possible value.
+ * @param upper Largest possible value.
+ * @return Float between lower and upper, inclusive.
+ */
+
+template <>
+float get(float lower, float upper);
+
+/**
+ * Get a random double with a limited domain.
+ * @param lower Smallest possible value.
+ * @param upper Largest possible value.
+ * @return Double between lower and upper, inclusive.
+ */
+
+template <>
+double get(double lower, double upper);
+
+/**
+ * Get a random float with a domain limited to [0.0, 1.0].
+ * @return Float between 0.0 and 1.0, inclusive.
+ */
+
+template <>
+float get();
+
+/**
+ * Get a random double with a domain limited to [0.0, 1.0].
+ * @return Double between 0.0 and 1.0, inclusive.
+ */
+
+template <>
+double get();
+
+
+}; // namespace rng
+
+
+#endif // _RNG_RANDOM_HH_
+