From 83601671c7b6aca820b3d55ced8ba30d0c82b4b5 Mon Sep 17 00:00:00 2001 From: skidd13 Date: Wed, 21 Nov 2007 19:13:38 +0000 Subject: (svn r11488) -Codechange: Spilt the random functions out to seperate file -Codechange: Make the mersenne twister more readable -Codechange: Unify the seeding process of random --- src/core/random_func.cpp | 930 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 930 insertions(+) create mode 100644 src/core/random_func.cpp (limited to 'src/core/random_func.cpp') diff --git a/src/core/random_func.cpp b/src/core/random_func.cpp new file mode 100644 index 000000000..be22e376d --- /dev/null +++ b/src/core/random_func.cpp @@ -0,0 +1,930 @@ +/* $Id$ */ + +/** @file random_func.cpp */ + +#include "../stdafx.h" +#include "../macros.h" +#include "../variables.h" +#include "random_func.hpp" + +uint32 InteractiveRandom() +{ + const uint32 s = _random_seeds[1][0]; + const uint32 t = _random_seeds[1][1]; + + _random_seeds[1][0] = s + ROR(t ^ 0x1234567F, 7) + 1; + return _random_seeds[1][1] = ROR(s, 3) - 1; +} + +uint InteractiveRandomRange(uint max) +{ + return GB(InteractiveRandom(), 0, 16) * max >> 16; +} + +#ifdef MERSENNE_TWISTER +// Source code for Mersenne Twister. +// A Random number generator with much higher quality random numbers. + +#define N (624) // length of _mt_state vector +#define M (397) // a period parameter +#define K (0x9908B0DFU) // a magic constant +#define hiBit(u) ((u) & 0x80000000U) // mask all but highest bit of u +#define loBit(u) ((u) & 0x00000001U) // mask all but lowest bit of u +#define loBits(u) ((u) & 0x7FFFFFFFU) // mask the highest bit of u +#define mixBits(u, v) (hiBit(u)|loBits(v)) // move hi bit of u to hi bit of v + +static uint32 _mt_state[N+1]; // _mt_state vector + 1 extra to not violate ANSI C +static uint32 *_mt_next; // _mt_next random value is computed from here +static int _mt_left = -1; // can *_mt_next++ this many times before reloading + +void SetRandomSeed(register uint32 seed) +{ + register uint32 *s = _mt_state; + _mt_left = 0; + + seed |= 1U; + seed &= 0xFFFFFFFFU; + + *s = seed; + + for (register uint i = N; i != 0; i--) { + seed *= 69069U; + *s++; + *s = seed & 0xFFFFFFFFU; + } +} + +static uint32 ReloadRandom() +{ + if (_mt_left < -1) SetRandomSeed(4357U); + + _mt_left = N - 1; + _mt_next = _mt_state + 1; + + register uint32 *p0 = _mt_state; + register uint32 *p2 = _mt_state + 2; + register uint32 *pM = _mt_state + M; + + register uint32 s0 = _mt_state[0]; + register uint32 s1 = _mt_state[1]; + + register uint i = 0; + + for (i = (N - M + 1); i != 0; i--) { + s0 = s1; + s1 = *p2; + *p0 = *pM ^ (mixBits(s0, s1) >> 1) ^ (loBit(s1) ? K : 0U); + *p0++; + *p2++; + *pM++; + } + + pM = _mt_state; + + for (i = M; i != 0; i--) { + s0 = s1; + s1 = *p2; + *p0 = *pM ^ (mixBits(s0, s1) >> 1) ^ (loBit(s1) ? K : 0U); + *p0++; + *p2++; + *pM++; + } + + s1 = _mt_state[0]; + *p0 = *pM ^ (mixBits(s0, s1) >> 1) ^ (loBit(s1) ? K : 0U); + + s1 ^= (s1 >> 11); + s1 ^= (s1 << 7) & 0x9D2C5680U; + s1 ^= (s1 << 15) & 0xEFC60000U; + s1 ^= (s1 >> 18); + return s1; +} + +uint32 Random() +{ + _mt_left--; + if (_mt_left < 0) return ReloadRandom(); + + uint32 y = *_mt_next; + *_mt_next++; + + y ^= (y >> 11); + y ^= (y << 7) & 0x9D2C5680U; + y ^= (y << 15) & 0xEFC60000U; + y ^= (y >> 18); + return y; +} + +#else /* MERSENNE_TWISTER */ +void SetRandomSeed(uint32 seed) +{ + _random_seeds[0][0] = seed; + _random_seeds[0][1] = seed; + _random_seeds[1][0] = seed * 0x1234567; + _random_seeds[1][1] = _random_seeds[1][0]; +} + +#ifdef RANDOM_DEBUG +#include "network/network_data.h" +uint32 DoRandom(int line, const char *file) +{ + if (_networking && (DEREF_CLIENT(0)->status != STATUS_INACTIVE || !_network_server)) + printf("Random [%d/%d] %s:%d\n",_frame_counter, (byte)_current_player, file, line); +#else /* RANDOM_DEBUG */ +uint32 Random() +{ +#endif /* RANDOM_DEBUG */ + const uint32 s = _random_seeds[0][0]; + const uint32 t = _random_seeds[0][1]; + + _random_seeds[0][0] = s + ROR(t ^ 0x1234567F, 7) + 1; + return _random_seeds[0][1] = ROR(s, 3) - 1; +} +#endif /* MERSENNE_TWISTER */ + +#if defined(RANDOM_DEBUG) && !defined(MERSENNE_TWISTER) +uint DoRandomRange(uint max, int line, const char *file) +{ + return GB(DoRandom(line, file), 0, 16) * max >> 16; +} +#else /* RANDOM_DEBUG & !MERSENNE_TWISTER */ +uint RandomRange(uint max) +{ + return GB(Random(), 0, 16) * max >> 16; +} +#endif /* RANDOM_DEBUG & !MERSENNE_TWISTER */ +/* $Id$ */ + +/** @file random_func.cpp */ + +#include "../stdafx.h" +#include "../macros.h" +#include "../variables.h" +#include "random_func.hpp" + +uint32 InteractiveRandom() +{ + const uint32 s = _random_seeds[1][0]; + const uint32 t = _random_seeds[1][1]; + + _random_seeds[1][0] = s + ROR(t ^ 0x1234567F, 7) + 1; + return _random_seeds[1][1] = ROR(s, 3) - 1; +} + +uint InteractiveRandomRange(uint max) +{ + return GB(InteractiveRandom(), 0, 16) * max >> 16; +} + +#ifdef MERSENNE_TWISTER +// Source code for Mersenne Twister. +// A Random number generator with much higher quality random numbers. + +#define N (624) // length of _mt_state vector +#define M (397) // a period parameter +#define K (0x9908B0DFU) // a magic constant +#define hiBit(u) ((u) & 0x80000000U) // mask all but highest bit of u +#define loBit(u) ((u) & 0x00000001U) // mask all but lowest bit of u +#define loBits(u) ((u) & 0x7FFFFFFFU) // mask the highest bit of u +#define mixBits(u, v) (hiBit(u)|loBits(v)) // move hi bit of u to hi bit of v + +static uint32 _mt_state[N+1]; // _mt_state vector + 1 extra to not violate ANSI C +static uint32 *_mt_next; // _mt_next random value is computed from here +static int _mt_left = -1; // can *_mt_next++ this many times before reloading + +void SetRandomSeed(register uint32 seed) +{ + register uint32 *s = _mt_state; + _mt_left = 0; + + seed |= 1U; + seed &= 0xFFFFFFFFU; + + *s = seed; + + for (register uint i = N; i != 0; i--) { + seed *= 69069U; + *s++; + *s = seed & 0xFFFFFFFFU; + } +} + +static uint32 ReloadRandom() +{ + if (_mt_left < -1) SetRandomSeed(4357U); + + _mt_left = N - 1; + _mt_next = _mt_state + 1; + + register uint32 *p0 = _mt_state; + register uint32 *p2 = _mt_state + 2; + register uint32 *pM = _mt_state + M; + + register uint32 s0 = _mt_state[0]; + register uint32 s1 = _mt_state[1]; + + register uint i = 0; + + for (i = (N - M + 1); i != 0; i--) { + s0 = s1; + s1 = *p2; + *p0 = *pM ^ (mixBits(s0, s1) >> 1) ^ (loBit(s1) ? K : 0U); + *p0++; + *p2++; + *pM++; + } + + pM = _mt_state; + + for (i = M; i != 0; i--) { + s0 = s1; + s1 = *p2; + *p0 = *pM ^ (mixBits(s0, s1) >> 1) ^ (loBit(s1) ? K : 0U); + *p0++; + *p2++; + *pM++; + } + + s1 = _mt_state[0]; + *p0 = *pM ^ (mixBits(s0, s1) >> 1) ^ (loBit(s1) ? K : 0U); + + s1 ^= (s1 >> 11); + s1 ^= (s1 << 7) & 0x9D2C5680U; + s1 ^= (s1 << 15) & 0xEFC60000U; + s1 ^= (s1 >> 18); + return s1; +} + +uint32 Random() +{ + _mt_left--; + if (_mt_left < 0) return ReloadRandom(); + + uint32 y = *_mt_next; + *_mt_next++; + + y ^= (y >> 11); + y ^= (y << 7) & 0x9D2C5680U; + y ^= (y << 15) & 0xEFC60000U; + y ^= (y >> 18); + return y; +} + +#else /* MERSENNE_TWISTER */ +void SetRandomSeed(uint32 seed) +{ + _random_seeds[0][0] = seed; + _random_seeds[0][1] = seed; + _random_seeds[1][0] = seed * 0x1234567; + _random_seeds[1][1] = _random_seeds[1][0]; +} + +#ifdef RANDOM_DEBUG +#include "network/network_data.h" +uint32 DoRandom(int line, const char *file) +{ + if (_networking && (DEREF_CLIENT(0)->status != STATUS_INACTIVE || !_network_server)) + printf("Random [%d/%d] %s:%d\n",_frame_counter, (byte)_current_player, file, line); +#else /* RANDOM_DEBUG */ +uint32 Random() +{ +#endif /* RANDOM_DEBUG */ + const uint32 s = _random_seeds[0][0]; + const uint32 t = _random_seeds[0][1]; + + _random_seeds[0][0] = s + ROR(t ^ 0x1234567F, 7) + 1; + return _random_seeds[0][1] = ROR(s, 3) - 1; +} +#endif /* MERSENNE_TWISTER */ + +#if defined(RANDOM_DEBUG) && !defined(MERSENNE_TWISTER) +uint DoRandomRange(uint max, int line, const char *file) +{ + return GB(DoRandom(line, file), 0, 16) * max >> 16; +} +#else /* RANDOM_DEBUG & !MERSENNE_TWISTER */ +uint RandomRange(uint max) +{ + return GB(Random(), 0, 16) * max >> 16; +} +#endif /* RANDOM_DEBUG & !MERSENNE_TWISTER */ +/* $Id$ */ + +/** @file random_func.cpp */ + +#include "../stdafx.h" +#include "../macros.h" +#include "../variables.h" +#include "random_func.hpp" + +uint32 InteractiveRandom() +{ + const uint32 s = _random_seeds[1][0]; + const uint32 t = _random_seeds[1][1]; + + _random_seeds[1][0] = s + ROR(t ^ 0x1234567F, 7) + 1; + return _random_seeds[1][1] = ROR(s, 3) - 1; +} + +uint InteractiveRandomRange(uint max) +{ + return GB(InteractiveRandom(), 0, 16) * max >> 16; +} + +#ifdef MERSENNE_TWISTER +// Source code for Mersenne Twister. +// A Random number generator with much higher quality random numbers. + +#define N (624) // length of _mt_state vector +#define M (397) // a period parameter +#define K (0x9908B0DFU) // a magic constant +#define hiBit(u) ((u) & 0x80000000U) // mask all but highest bit of u +#define loBit(u) ((u) & 0x00000001U) // mask all but lowest bit of u +#define loBits(u) ((u) & 0x7FFFFFFFU) // mask the highest bit of u +#define mixBits(u, v) (hiBit(u)|loBits(v)) // move hi bit of u to hi bit of v + +static uint32 _mt_state[N+1]; // _mt_state vector + 1 extra to not violate ANSI C +static uint32 *_mt_next; // _mt_next random value is computed from here +static int _mt_left = -1; // can *_mt_next++ this many times before reloading + +void SetRandomSeed(register uint32 seed) +{ + register uint32 *s = _mt_state; + _mt_left = 0; + + seed |= 1U; + seed &= 0xFFFFFFFFU; + + *s = seed; + + for (register uint i = N; i != 0; i--) { + seed *= 69069U; + *s++; + *s = seed & 0xFFFFFFFFU; + } +} + +static uint32 ReloadRandom() +{ + if (_mt_left < -1) SetRandomSeed(4357U); + + _mt_left = N - 1; + _mt_next = _mt_state + 1; + + register uint32 *p0 = _mt_state; + register uint32 *p2 = _mt_state + 2; + register uint32 *pM = _mt_state + M; + + register uint32 s0 = _mt_state[0]; + register uint32 s1 = _mt_state[1]; + + register uint i = 0; + + for (i = (N - M + 1); i != 0; i--) { + s0 = s1; + s1 = *p2; + *p0 = *pM ^ (mixBits(s0, s1) >> 1) ^ (loBit(s1) ? K : 0U); + *p0++; + *p2++; + *pM++; + } + + pM = _mt_state; + + for (i = M; i != 0; i--) { + s0 = s1; + s1 = *p2; + *p0 = *pM ^ (mixBits(s0, s1) >> 1) ^ (loBit(s1) ? K : 0U); + *p0++; + *p2++; + *pM++; + } + + s1 = _mt_state[0]; + *p0 = *pM ^ (mixBits(s0, s1) >> 1) ^ (loBit(s1) ? K : 0U); + + s1 ^= (s1 >> 11); + s1 ^= (s1 << 7) & 0x9D2C5680U; + s1 ^= (s1 << 15) & 0xEFC60000U; + s1 ^= (s1 >> 18); + return s1; +} + +uint32 Random() +{ + _mt_left--; + if (_mt_left < 0) return ReloadRandom(); + + uint32 y = *_mt_next; + *_mt_next++; + + y ^= (y >> 11); + y ^= (y << 7) & 0x9D2C5680U; + y ^= (y << 15) & 0xEFC60000U; + y ^= (y >> 18); + return y; +} + +#else /* MERSENNE_TWISTER */ +void SetRandomSeed(uint32 seed) +{ + _random_seeds[0][0] = seed; + _random_seeds[0][1] = seed; + _random_seeds[1][0] = seed * 0x1234567; + _random_seeds[1][1] = _random_seeds[1][0]; +} + +#ifdef RANDOM_DEBUG +#include "network/network_data.h" +uint32 DoRandom(int line, const char *file) +{ + if (_networking && (DEREF_CLIENT(0)->status != STATUS_INACTIVE || !_network_server)) + printf("Random [%d/%d] %s:%d\n",_frame_counter, (byte)_current_player, file, line); +#else /* RANDOM_DEBUG */ +uint32 Random() +{ +#endif /* RANDOM_DEBUG */ + const uint32 s = _random_seeds[0][0]; + const uint32 t = _random_seeds[0][1]; + + _random_seeds[0][0] = s + ROR(t ^ 0x1234567F, 7) + 1; + return _random_seeds[0][1] = ROR(s, 3) - 1; +} +#endif /* MERSENNE_TWISTER */ + +#if defined(RANDOM_DEBUG) && !defined(MERSENNE_TWISTER) +uint DoRandomRange(uint max, int line, const char *file) +{ + return GB(DoRandom(line, file), 0, 16) * max >> 16; +} +#else /* RANDOM_DEBUG & !MERSENNE_TWISTER */ +uint RandomRange(uint max) +{ + return GB(Random(), 0, 16) * max >> 16; +} +#endif /* RANDOM_DEBUG & !MERSENNE_TWISTER */ +/* $Id$ */ + +/** @file random_func.cpp */ + +#include "../stdafx.h" +#include "../macros.h" +#include "../variables.h" +#include "random_func.hpp" + +uint32 InteractiveRandom() +{ + const uint32 s = _random_seeds[1][0]; + const uint32 t = _random_seeds[1][1]; + + _random_seeds[1][0] = s + ROR(t ^ 0x1234567F, 7) + 1; + return _random_seeds[1][1] = ROR(s, 3) - 1; +} + +uint InteractiveRandomRange(uint max) +{ + return GB(InteractiveRandom(), 0, 16) * max >> 16; +} + +#ifdef MERSENNE_TWISTER +// Source code for Mersenne Twister. +// A Random number generator with much higher quality random numbers. + +#define N (624) // length of _mt_state vector +#define M (397) // a period parameter +#define K (0x9908B0DFU) // a magic constant +#define hiBit(u) ((u) & 0x80000000U) // mask all but highest bit of u +#define loBit(u) ((u) & 0x00000001U) // mask all but lowest bit of u +#define loBits(u) ((u) & 0x7FFFFFFFU) // mask the highest bit of u +#define mixBits(u, v) (hiBit(u)|loBits(v)) // move hi bit of u to hi bit of v + +static uint32 _mt_state[N+1]; // _mt_state vector + 1 extra to not violate ANSI C +static uint32 *_mt_next; // _mt_next random value is computed from here +static int _mt_left = -1; // can *_mt_next++ this many times before reloading + +void SetRandomSeed(register uint32 seed) +{ + register uint32 *s = _mt_state; + _mt_left = 0; + + seed |= 1U; + seed &= 0xFFFFFFFFU; + + *s = seed; + + for (register uint i = N; i != 0; i--) { + seed *= 69069U; + *s++; + *s = seed & 0xFFFFFFFFU; + } +} + +static uint32 ReloadRandom() +{ + if (_mt_left < -1) SetRandomSeed(4357U); + + _mt_left = N - 1; + _mt_next = _mt_state + 1; + + register uint32 *p0 = _mt_state; + register uint32 *p2 = _mt_state + 2; + register uint32 *pM = _mt_state + M; + + register uint32 s0 = _mt_state[0]; + register uint32 s1 = _mt_state[1]; + + register uint i = 0; + + for (i = (N - M + 1); i != 0; i--) { + s0 = s1; + s1 = *p2; + *p0 = *pM ^ (mixBits(s0, s1) >> 1) ^ (loBit(s1) ? K : 0U); + *p0++; + *p2++; + *pM++; + } + + pM = _mt_state; + + for (i = M; i != 0; i--) { + s0 = s1; + s1 = *p2; + *p0 = *pM ^ (mixBits(s0, s1) >> 1) ^ (loBit(s1) ? K : 0U); + *p0++; + *p2++; + *pM++; + } + + s1 = _mt_state[0]; + *p0 = *pM ^ (mixBits(s0, s1) >> 1) ^ (loBit(s1) ? K : 0U); + + s1 ^= (s1 >> 11); + s1 ^= (s1 << 7) & 0x9D2C5680U; + s1 ^= (s1 << 15) & 0xEFC60000U; + s1 ^= (s1 >> 18); + return s1; +} + +uint32 Random() +{ + _mt_left--; + if (_mt_left < 0) return ReloadRandom(); + + uint32 y = *_mt_next; + *_mt_next++; + + y ^= (y >> 11); + y ^= (y << 7) & 0x9D2C5680U; + y ^= (y << 15) & 0xEFC60000U; + y ^= (y >> 18); + return y; +} + +#else /* MERSENNE_TWISTER */ +void SetRandomSeed(uint32 seed) +{ + _random_seeds[0][0] = seed; + _random_seeds[0][1] = seed; + _random_seeds[1][0] = seed * 0x1234567; + _random_seeds[1][1] = _random_seeds[1][0]; +} + +#ifdef RANDOM_DEBUG +#include "network/network_data.h" +uint32 DoRandom(int line, const char *file) +{ + if (_networking && (DEREF_CLIENT(0)->status != STATUS_INACTIVE || !_network_server)) + printf("Random [%d/%d] %s:%d\n",_frame_counter, (byte)_current_player, file, line); +#else /* RANDOM_DEBUG */ +uint32 Random() +{ +#endif /* RANDOM_DEBUG */ + const uint32 s = _random_seeds[0][0]; + const uint32 t = _random_seeds[0][1]; + + _random_seeds[0][0] = s + ROR(t ^ 0x1234567F, 7) + 1; + return _random_seeds[0][1] = ROR(s, 3) - 1; +} +#endif /* MERSENNE_TWISTER */ + +#if defined(RANDOM_DEBUG) && !defined(MERSENNE_TWISTER) +uint DoRandomRange(uint max, int line, const char *file) +{ + return GB(DoRandom(line, file), 0, 16) * max >> 16; +} +#else /* RANDOM_DEBUG & !MERSENNE_TWISTER */ +uint RandomRange(uint max) +{ + return GB(Random(), 0, 16) * max >> 16; +} +#endif /* RANDOM_DEBUG & !MERSENNE_TWISTER */ +/* $Id$ */ + +/** @file random_func.cpp */ + +#include "../stdafx.h" +#include "../macros.h" +#include "../variables.h" +#include "random_func.hpp" + +uint32 InteractiveRandom() +{ + const uint32 s = _random_seeds[1][0]; + const uint32 t = _random_seeds[1][1]; + + _random_seeds[1][0] = s + ROR(t ^ 0x1234567F, 7) + 1; + return _random_seeds[1][1] = ROR(s, 3) - 1; +} + +uint InteractiveRandomRange(uint max) +{ + return GB(InteractiveRandom(), 0, 16) * max >> 16; +} + +#ifdef MERSENNE_TWISTER +// Source code for Mersenne Twister. +// A Random number generator with much higher quality random numbers. + +#define N (624) // length of _mt_state vector +#define M (397) // a period parameter +#define K (0x9908B0DFU) // a magic constant +#define hiBit(u) ((u) & 0x80000000U) // mask all but highest bit of u +#define loBit(u) ((u) & 0x00000001U) // mask all but lowest bit of u +#define loBits(u) ((u) & 0x7FFFFFFFU) // mask the highest bit of u +#define mixBits(u, v) (hiBit(u)|loBits(v)) // move hi bit of u to hi bit of v + +static uint32 _mt_state[N+1]; // _mt_state vector + 1 extra to not violate ANSI C +static uint32 *_mt_next; // _mt_next random value is computed from here +static int _mt_left = -1; // can *_mt_next++ this many times before reloading + +void SetRandomSeed(register uint32 seed) +{ + register uint32 *s = _mt_state; + _mt_left = 0; + + seed |= 1U; + seed &= 0xFFFFFFFFU; + + *s = seed; + + for (register uint i = N; i != 0; i--) { + seed *= 69069U; + *s++; + *s = seed & 0xFFFFFFFFU; + } +} + +static uint32 ReloadRandom() +{ + if (_mt_left < -1) SetRandomSeed(4357U); + + _mt_left = N - 1; + _mt_next = _mt_state + 1; + + register uint32 *p0 = _mt_state; + register uint32 *p2 = _mt_state + 2; + register uint32 *pM = _mt_state + M; + + register uint32 s0 = _mt_state[0]; + register uint32 s1 = _mt_state[1]; + + register uint i = 0; + + for (i = (N - M + 1); i != 0; i--) { + s0 = s1; + s1 = *p2; + *p0 = *pM ^ (mixBits(s0, s1) >> 1) ^ (loBit(s1) ? K : 0U); + *p0++; + *p2++; + *pM++; + } + + pM = _mt_state; + + for (i = M; i != 0; i--) { + s0 = s1; + s1 = *p2; + *p0 = *pM ^ (mixBits(s0, s1) >> 1) ^ (loBit(s1) ? K : 0U); + *p0++; + *p2++; + *pM++; + } + + s1 = _mt_state[0]; + *p0 = *pM ^ (mixBits(s0, s1) >> 1) ^ (loBit(s1) ? K : 0U); + + s1 ^= (s1 >> 11); + s1 ^= (s1 << 7) & 0x9D2C5680U; + s1 ^= (s1 << 15) & 0xEFC60000U; + s1 ^= (s1 >> 18); + return s1; +} + +uint32 Random() +{ + _mt_left--; + if (_mt_left < 0) return ReloadRandom(); + + uint32 y = *_mt_next; + *_mt_next++; + + y ^= (y >> 11); + y ^= (y << 7) & 0x9D2C5680U; + y ^= (y << 15) & 0xEFC60000U; + y ^= (y >> 18); + return y; +} + +#else /* MERSENNE_TWISTER */ +void SetRandomSeed(uint32 seed) +{ + _random_seeds[0][0] = seed; + _random_seeds[0][1] = seed; + _random_seeds[1][0] = seed * 0x1234567; + _random_seeds[1][1] = _random_seeds[1][0]; +} + +#ifdef RANDOM_DEBUG +#include "network/network_data.h" +uint32 DoRandom(int line, const char *file) +{ + if (_networking && (DEREF_CLIENT(0)->status != STATUS_INACTIVE || !_network_server)) + printf("Random [%d/%d] %s:%d\n",_frame_counter, (byte)_current_player, file, line); +#else /* RANDOM_DEBUG */ +uint32 Random() +{ +#endif /* RANDOM_DEBUG */ + const uint32 s = _random_seeds[0][0]; + const uint32 t = _random_seeds[0][1]; + + _random_seeds[0][0] = s + ROR(t ^ 0x1234567F, 7) + 1; + return _random_seeds[0][1] = ROR(s, 3) - 1; +} +#endif /* MERSENNE_TWISTER */ + +#if defined(RANDOM_DEBUG) && !defined(MERSENNE_TWISTER) +uint DoRandomRange(uint max, int line, const char *file) +{ + return GB(DoRandom(line, file), 0, 16) * max >> 16; +} +#else /* RANDOM_DEBUG & !MERSENNE_TWISTER */ +uint RandomRange(uint max) +{ + return GB(Random(), 0, 16) * max >> 16; +} +#endif /* RANDOM_DEBUG & !MERSENNE_TWISTER */ +/* $Id$ */ + +/** @file random_func.cpp */ + +#include "../stdafx.h" +#include "../macros.h" +#include "../variables.h" +#include "random_func.hpp" + +uint32 InteractiveRandom() +{ + const uint32 s = _random_seeds[1][0]; + const uint32 t = _random_seeds[1][1]; + + _random_seeds[1][0] = s + ROR(t ^ 0x1234567F, 7) + 1; + return _random_seeds[1][1] = ROR(s, 3) - 1; +} + +uint InteractiveRandomRange(uint max) +{ + return GB(InteractiveRandom(), 0, 16) * max >> 16; +} + +#ifdef MERSENNE_TWISTER +// Source code for Mersenne Twister. +// A Random number generator with much higher quality random numbers. + +#define N (624) // length of _mt_state vector +#define M (397) // a period parameter +#define K (0x9908B0DFU) // a magic constant +#define hiBit(u) ((u) & 0x80000000U) // mask all but highest bit of u +#define loBit(u) ((u) & 0x00000001U) // mask all but lowest bit of u +#define loBits(u) ((u) & 0x7FFFFFFFU) // mask the highest bit of u +#define mixBits(u, v) (hiBit(u)|loBits(v)) // move hi bit of u to hi bit of v + +static uint32 _mt_state[N+1]; // _mt_state vector + 1 extra to not violate ANSI C +static uint32 *_mt_next; // _mt_next random value is computed from here +static int _mt_left = -1; // can *_mt_next++ this many times before reloading + +void SetRandomSeed(register uint32 seed) +{ + register uint32 *s = _mt_state; + _mt_left = 0; + + seed |= 1U; + seed &= 0xFFFFFFFFU; + + *s = seed; + + for (register uint i = N; i != 0; i--) { + seed *= 69069U; + *s++; + *s = seed & 0xFFFFFFFFU; + } +} + +static uint32 ReloadRandom() +{ + if (_mt_left < -1) SetRandomSeed(4357U); + + _mt_left = N - 1; + _mt_next = _mt_state + 1; + + register uint32 *p0 = _mt_state; + register uint32 *p2 = _mt_state + 2; + register uint32 *pM = _mt_state + M; + + register uint32 s0 = _mt_state[0]; + register uint32 s1 = _mt_state[1]; + + register uint i = 0; + + for (i = (N - M + 1); i != 0; i--) { + s0 = s1; + s1 = *p2; + *p0 = *pM ^ (mixBits(s0, s1) >> 1) ^ (loBit(s1) ? K : 0U); + *p0++; + *p2++; + *pM++; + } + + pM = _mt_state; + + for (i = M; i != 0; i--) { + s0 = s1; + s1 = *p2; + *p0 = *pM ^ (mixBits(s0, s1) >> 1) ^ (loBit(s1) ? K : 0U); + *p0++; + *p2++; + *pM++; + } + + s1 = _mt_state[0]; + *p0 = *pM ^ (mixBits(s0, s1) >> 1) ^ (loBit(s1) ? K : 0U); + + s1 ^= (s1 >> 11); + s1 ^= (s1 << 7) & 0x9D2C5680U; + s1 ^= (s1 << 15) & 0xEFC60000U; + s1 ^= (s1 >> 18); + return s1; +} + +uint32 Random() +{ + _mt_left--; + if (_mt_left < 0) return ReloadRandom(); + + uint32 y = *_mt_next; + *_mt_next++; + + y ^= (y >> 11); + y ^= (y << 7) & 0x9D2C5680U; + y ^= (y << 15) & 0xEFC60000U; + y ^= (y >> 18); + return y; +} + +#else /* MERSENNE_TWISTER */ +void SetRandomSeed(uint32 seed) +{ + _random_seeds[0][0] = seed; + _random_seeds[0][1] = seed; + _random_seeds[1][0] = seed * 0x1234567; + _random_seeds[1][1] = _random_seeds[1][0]; +} + +#ifdef RANDOM_DEBUG +#include "network/network_data.h" +uint32 DoRandom(int line, const char *file) +{ + if (_networking && (DEREF_CLIENT(0)->status != STATUS_INACTIVE || !_network_server)) + printf("Random [%d/%d] %s:%d\n",_frame_counter, (byte)_current_player, file, line); +#else /* RANDOM_DEBUG */ +uint32 Random() +{ +#endif /* RANDOM_DEBUG */ + const uint32 s = _random_seeds[0][0]; + const uint32 t = _random_seeds[0][1]; + + _random_seeds[0][0] = s + ROR(t ^ 0x1234567F, 7) + 1; + return _random_seeds[0][1] = ROR(s, 3) - 1; +} +#endif /* MERSENNE_TWISTER */ + +#if defined(RANDOM_DEBUG) && !defined(MERSENNE_TWISTER) +uint DoRandomRange(uint max, int line, const char *file) +{ + return GB(DoRandom(line, file), 0, 16) * max >> 16; +} +#else /* RANDOM_DEBUG & !MERSENNE_TWISTER */ +uint RandomRange(uint max) +{ + return GB(Random(), 0, 16) * max >> 16; +} +#endif /* RANDOM_DEBUG & !MERSENNE_TWISTER */ -- cgit v1.2.3-54-g00ecf