X-Git-Url: https://git.dogcows.com/gitweb?p=chaz%2Fyoink;a=blobdiff_plain;f=src%2FMoof%2FRandom.cc;fp=src%2FMoof%2FRandom.cc;h=0000000000000000000000000000000000000000;hp=a88100836cd79c749721dcb4eb3fc66da375f510;hb=f0aed8dbdbdd61ac9d0728058ba5eb9693b4b94c;hpb=9303f348325e4b276546d08c11fb4ad45e546765 diff --git a/src/Moof/Random.cc b/src/Moof/Random.cc deleted file mode 100644 index a881008..0000000 --- a/src/Moof/Random.cc +++ /dev/null @@ -1,118 +0,0 @@ - -/******************************************************************************* - - 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. - -*******************************************************************************/ - -#include // ULONG_MAX -#include // log -#include // srand, rand, RAND_MAX -#include // time - -#include "Random.hh" - - -namespace Mf { - - -unsigned setSeed(unsigned theSeed) -{ - srand(theSeed); - return theSeed; -} - -unsigned setSeed() -{ - return setSeed(time(0)); -} - - -template -T getRandom() -{ - const float ln2 = 0.693147; - static const unsigned bitsPerPiece = std::log(float(RAND_MAX)) / ln2; - static const unsigned sizeOfType = sizeof(T) * 8; - static const unsigned pieces = sizeOfType / bitsPerPiece + - ((sizeOfType % bitsPerPiece) ? 1 : 0); - - T bits = 0; - - // we need to call rand() multiple times if it won't provide enough random - // bits to fill the size of the given type - for (unsigned i = 0; i < pieces; i++) - { - long piece = rand(); - bits |= piece << (i * bitsPerPiece); - } - - return bits; -} - - -template <> -bool getRandom() -{ - return rand() % 2; -} - -template -T getRandom(T lower, T upper) -{ - unsigned short randInt = getRandom(); - return lower + T(randInt % (upper - lower + 1)); -} - -template <> -float getRandom(float lower, float upper) -{ - unsigned long randInt = getRandom(); - return (float(randInt) / float(ULONG_MAX)) * (upper - lower) + lower; -} - -template <> -double getRandom(double lower, double upper) -{ - unsigned long long randInt = getRandom(); - return (double(randInt) / double(ULLONG_MAX)) * (upper - lower) + lower; -} - -template <> -float getRandom() -{ - return getRandom(0.0, 1.0); -} - -template <> -double getRandom() -{ - return getRandom(0.0, 1.0); -} - - -}; // namespace Mf - -/** vim: set ts=4 sw=4 tw=80: *************************************************/ -