diff options
Diffstat (limited to 'contrib/libg++/libg++/src/MLCG.cc')
-rw-r--r-- | contrib/libg++/libg++/src/MLCG.cc | 103 |
1 files changed, 0 insertions, 103 deletions
diff --git a/contrib/libg++/libg++/src/MLCG.cc b/contrib/libg++/libg++/src/MLCG.cc deleted file mode 100644 index 8e624772f34df..0000000000000 --- a/contrib/libg++/libg++/src/MLCG.cc +++ /dev/null @@ -1,103 +0,0 @@ -// This may look like C code, but it is really -*- C++ -*- -/* -Copyright (C) 1989 Free Software Foundation - -This file is part of the GNU C++ Library. This library is free -software; you can redistribute it and/or modify it under the terms of -the GNU Library General Public License as published by the Free -Software Foundation; either version 2 of the License, or (at your -option) any later version. This library is distributed in the hope -that it will be useful, but WITHOUT ANY WARRANTY; without even the -implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR -PURPOSE. See the GNU Library General Public License for more details. -You should have received a copy of the GNU Library General Public -License along with this library; if not, write to the Free Software -Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. -*/ -#ifdef __GNUG__ -#pragma implementation -#endif -#include <MLCG.h> -// -// SEED_TABLE_SIZE must be a power of 2 -// - - -#define SEED_TABLE_SIZE 32 - -static _G_int32_t seedTable[SEED_TABLE_SIZE] = { -0xbdcc47e5, 0x54aea45d, 0xec0df859, 0xda84637b, -0xc8c6cb4f, 0x35574b01, 0x28260b7d, 0x0d07fdbf, -0x9faaeeb0, 0x613dd169, 0x5ce2d818, 0x85b9e706, -0xab2469db, 0xda02b0dc, 0x45c60d6e, 0xffe49d10, -0x7224fea3, 0xf9684fc9, 0xfc7ee074, 0x326ce92a, -0x366d13b5, 0x17aaa731, 0xeb83a675, 0x7781cb32, -0x4ec7c92d, 0x7f187521, 0x2cf346b4, 0xad13310f, -0xb89cff2b, 0x12164de1, 0xa865168d, 0x32b56cdf -}; - -MLCG::MLCG(_G_int32_t seed1, _G_int32_t seed2) -{ - initialSeedOne = seed1; - initialSeedTwo = seed2; - reset(); -} - -void -MLCG::reset() -{ - _G_int32_t seed1 = initialSeedOne; - _G_int32_t seed2 = initialSeedTwo; - - // - // Most people pick stupid seed numbers that do not have enough - // bits. In this case, if they pick a small seed number, we - // map that to a specific seed. - // - if (seed1 < 0) { - seed1 = (seed1 + 2147483561); - seed1 = (seed1 < 0) ? -seed1 : seed1; - } - - if (seed2 < 0) { - seed2 = (seed2 + 2147483561); - seed2 = (seed2 < 0) ? -seed2 : seed2; - } - - if (seed1 > -1 && seed1 < SEED_TABLE_SIZE) { - seedOne = seedTable[seed1]; - } else { - seedOne = seed1 ^ seedTable[seed1 & (SEED_TABLE_SIZE-1)]; - } - - if (seed2 > -1 && seed2 < SEED_TABLE_SIZE) { - seedTwo = seedTable[seed2]; - } else { - seedTwo = seed2 ^ seedTable[ seed2 & (SEED_TABLE_SIZE-1) ]; - } - seedOne = (seedOne % 2147483561) + 1; - seedTwo = (seedTwo % 2147483397) + 1; -} - -_G_uint32_t MLCG::asLong() -{ - _G_int32_t k = seedOne % 53668; - - seedOne = 40014 * (seedOne-k * 53668) - k * 12211; - if (seedOne < 0) { - seedOne += 2147483563; - } - - k = seedTwo % 52774; - seedTwo = 40692 * (seedTwo - k * 52774) - k * 3791; - if (seedTwo < 0) { - seedTwo += 2147483399; - } - - _G_int32_t z = seedOne - seedTwo; - if (z < 1) { - z += 2147483562; - } - return( (unsigned long) z); -} - |