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-rw-r--r--src/core/random_func.cpp46
-rw-r--r--src/core/random_func.hpp39
-rw-r--r--src/genworld.cpp2
-rw-r--r--src/misc.cpp4
-rw-r--r--src/network/network.cpp8
-rw-r--r--src/oldloader.cpp2
6 files changed, 61 insertions, 40 deletions
diff --git a/src/core/random_func.cpp b/src/core/random_func.cpp
index b0939229e..f74309a6e 100644
--- a/src/core/random_func.cpp
+++ b/src/core/random_func.cpp
@@ -6,20 +6,26 @@
#include "random_func.hpp"
#include "bitmath_func.hpp"
-uint32 _random_seeds[2][2];
+Randomizer _random, _interactive_random;
-uint32 InteractiveRandom()
+uint32 Randomizer::Next()
{
- const uint32 s = _random_seeds[1][0];
- const uint32 t = _random_seeds[1][1];
+ const uint32 s = this->state[0];
+ const uint32 t = this->state[1];
- _random_seeds[1][0] = s + ROR(t ^ 0x1234567F, 7) + 1;
- return _random_seeds[1][1] = ROR(s, 3) - 1;
+ this->state[0] = s + ROR(t ^ 0x1234567F, 7) + 1;
+ return this->state[1] = ROR(s, 3) - 1;
}
-uint InteractiveRandomRange(uint max)
+uint32 Randomizer::Next(uint16 max)
{
- return GB(InteractiveRandom(), 0, 16) * max >> 16;
+ return GB(this->Next(), 0, 16) * max >> 16;
+}
+
+void Randomizer::SetSeed(uint32 seed)
+{
+ this->state[0] = seed;
+ this->state[1] = seed;
}
#ifdef MERSENNE_TWISTER
@@ -119,28 +125,21 @@ uint32 Random()
#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];
+ _random.SetSeed(seed);
+ _interactive_random.SetSeed(seed * 0x1234567);
}
#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))
+ 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;
+ return _random->Next()
}
+#endif /* RANDOM_DEBUG */
#endif /* MERSENNE_TWISTER */
#if defined(RANDOM_DEBUG) && !defined(MERSENNE_TWISTER)
@@ -148,9 +147,4 @@ 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 */
diff --git a/src/core/random_func.hpp b/src/core/random_func.hpp
index f3d35d987..d941f283c 100644
--- a/src/core/random_func.hpp
+++ b/src/core/random_func.hpp
@@ -27,6 +27,35 @@
// Doesn't work with network yet.
// #define MERSENNE_TWISTER
+/**
+ * Structure to encapsulate the pseudo random number generators.
+ */
+struct Randomizer {
+ /** The state of the randomizer */
+ uint32 state[2];
+
+ /**
+ * Generate the next pseudo random number
+ * @return the random number
+ */
+ uint32 Next();
+
+ /**
+ * Generate the next pseudo random number scaled to max
+ * @param max the maximum value of the returned random number
+ * @return the random number
+ */
+ uint32 Next(uint16 max);
+
+ /**
+ * (Re)set the state of the random number generator.
+ * @param seed the new state
+ */
+ void SetSeed(uint32 seed);
+};
+extern Randomizer _random; ///< Random used in the game state calculations
+extern Randomizer _interactive_random; ///< Random used every else where is does not (directly) influence the game state
+
void SetRandomSeed(uint32 seed);
#ifdef RANDOM_DEBUG
#define Random() DoRandom(__LINE__, __FILE__)
@@ -34,12 +63,12 @@ void SetRandomSeed(uint32 seed);
#define RandomRange(max) DoRandomRange(max, __LINE__, __FILE__)
uint DoRandomRange(uint max, int line, const char *file);
#else
- uint32 Random();
- uint RandomRange(uint max);
+ static inline uint32 Random() { return _random.Next(); }
+ static inline uint32 RandomRange(uint16 max) { return _random.Next(max); }
#endif
-uint32 InteractiveRandom(); // Used for random sequences that are not the same on the other end of the multiplayer link
-uint InteractiveRandomRange(uint max);
+static inline uint32 InteractiveRandom() { return _interactive_random.Next(); }
+static inline uint32 InteractiveRandomRange(uint16 max) { return _interactive_random.Next(max); }
/**
* Checks if a given randomize-number is below a given probability.
@@ -100,6 +129,4 @@ static inline bool Chance16R(const uint a, const uint b, uint32 &r)
return Chance16I(a, b, r);
}
-extern uint32 _random_seeds[2][2];
-
#endif /* RANDOM_FUNC_HPP */
diff --git a/src/genworld.cpp b/src/genworld.cpp
index f33df1a25..08768e024 100644
--- a/src/genworld.cpp
+++ b/src/genworld.cpp
@@ -90,7 +90,7 @@ static void *_GenerateWorld(void *arg)
if (_network_dedicated) DEBUG(net, 0, "Generating map, please wait...");
/* Set the Random() seed to generation_seed so we produce the same map with the same seed */
if (_patches.generation_seed == GENERATE_NEW_SEED) _patches.generation_seed = _patches_newgame.generation_seed = InteractiveRandom();
- _random_seeds[0][0] = _random_seeds[0][1] = _patches.generation_seed;
+ _random.SetSeed(_patches.generation_seed);
SetGeneratingWorldProgress(GWP_MAP_INIT, 2);
SetObjectToPlace(SPR_CURSOR_ZZZ, PAL_NONE, VHM_NONE, WC_MAIN_WINDOW, 0);
diff --git a/src/misc.cpp b/src/misc.cpp
index 599a3563d..4d828c9b7 100644
--- a/src/misc.cpp
+++ b/src/misc.cpp
@@ -205,8 +205,8 @@ static const SaveLoadGlobVarList _date_desc[] = {
SLEG_CONDVAR(_cur_tileloop_tile, SLE_UINT32, 6, SL_MAX_VERSION),
SLEG_VAR(_disaster_delay, SLE_UINT16),
SLEG_VAR(_station_tick_ctr, SLE_UINT16),
- SLEG_VAR(_random_seeds[0][0], SLE_UINT32),
- SLEG_VAR(_random_seeds[0][1], SLE_UINT32),
+ SLEG_VAR(_random.state[0], SLE_UINT32),
+ SLEG_VAR(_random.state[1], SLE_UINT32),
SLEG_CONDVAR(_cur_town_ctr, SLE_FILE_U8 | SLE_VAR_U32, 0, 9),
SLEG_CONDVAR(_cur_town_ctr, SLE_UINT32, 10, SL_MAX_VERSION),
SLEG_VAR(_cur_player_tick_index, SLE_FILE_U8 | SLE_VAR_U32),
diff --git a/src/network/network.cpp b/src/network/network.cpp
index 1cd128181..b8a53feb5 100644
--- a/src/network/network.cpp
+++ b/src/network/network.cpp
@@ -1235,9 +1235,9 @@ static bool NetworkDoClientLoop()
if (_sync_frame != 0) {
if (_sync_frame == _frame_counter) {
#ifdef NETWORK_SEND_DOUBLE_SEED
- if (_sync_seed_1 != _random_seeds[0][0] || _sync_seed_2 != _random_seeds[0][1]) {
+ if (_sync_seed_1 != _random.state[0] || _sync_seed_2 != _random.state[1]) {
#else
- if (_sync_seed_1 != _random_seeds[0][0]) {
+ if (_sync_seed_1 != _random.state[0]) {
#endif
NetworkError(STR_NETWORK_ERR_DESYNC);
DebugDumpCommands("ddc:serr:%d;%d\n", _date, _date_fract);
@@ -1332,9 +1332,9 @@ void NetworkGameLoop()
// Then we make the frame
StateGameLoop();
- _sync_seed_1 = _random_seeds[0][0];
+ _sync_seed_1 = _random.state[0];
#ifdef NETWORK_SEND_DOUBLE_SEED
- _sync_seed_2 = _random_seeds[0][1];
+ _sync_seed_2 = _random.state[1];
#endif
NetworkServer_Tick(send_frame);
diff --git a/src/oldloader.cpp b/src/oldloader.cpp
index e5606f65f..ec5f7b9e0 100644
--- a/src/oldloader.cpp
+++ b/src/oldloader.cpp
@@ -1456,7 +1456,7 @@ static const OldChunks main_chunk[] = {
OCL_VAR ( OC_FILE_U16 | OC_VAR_U32, 1, &_date ),
OCL_VAR ( OC_UINT16, 1, &_date_fract ),
OCL_NULL( 600 ), ///< TextEffects
- OCL_VAR ( OC_UINT32, 2, &_random_seeds[0] ),
+ OCL_VAR ( OC_UINT32, 2, &_random.state ),
OCL_ASSERT( 0x264 ),
OCL_CHUNK( 70, LoadOldTown ),
generated by cgit v1.2.3-70-g09d2 (git 2.47.1) at 2024-12-21 10:42:09 +0000