312 lines
8.1 KiB
C++
312 lines
8.1 KiB
C++
/* Plugin for exporting C++11 random number functionality
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*Exports functions for random number generation
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*Functions:
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- seedRNG(seed)
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- rollInt(min, max)
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- rollDouble(min, max)
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- rollNormal(mean, std_deviation)
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- rollBool(chance_for_true)
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- resetIndexRolls(string, array_length) --String identifies the instance of SimpleNumDistribution to reset
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- rollIndex(string, array_length) --String identifies the instance of SimpleNumDistribution to use
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--(Shuffles a vector of indices, Next() increments through then reshuffles when end() is reached)
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Author: Josh Cooper
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Created: Dec. 13 2017
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Updated: Dec. 21 2017
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*/
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#include <random>
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#include <chrono>
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#include <unordered_map>
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#include <vector>
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#include <algorithm>
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#include <cstdint>
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#include <stdio.h>
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#include <stdlib.h>
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#include "Error.h"
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#include "Core.h"
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#include "DataFuncs.h"
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#include <Console.h>
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#include <Export.h>
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#include <PluginManager.h>
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/*
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typedef unsigned short uint16_t;
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typedef unsigned long long uint64_t;
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typedef long long int64_t;
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using uint16_t = unsigned short;
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using uint64_t = unsigned long long;
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using int64_t = long long;*/
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using namespace DFHack;
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DFHACK_PLUGIN("cxxrandom");
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#define PLUGIN_VERSION 2.0
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color_ostream *cout = nullptr;
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//command_result cxxrandom (color_ostream &out, std::vector <std::string> & parameters);
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DFhackCExport command_result plugin_init (color_ostream &out, std::vector <PluginCommand> &commands)
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{
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cout = &out;
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/*
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commands.push_back(PluginCommand(
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"cxxrandom", "C++xx Random Numbers", cxxrandom, false,
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" This plugin cannot be used on the commandline.\n"
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" Import into a lua script to have access to exported RNG functions:\n"
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" local rng = require('plugins.cxxrandom')\n\n"
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" Exported Functions:\n"
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" rng.ResetIndexRolls(string_ref, total_indices)\n"
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" rng.RollIndex(string_ref, total_indices)\n"
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" rng.RollInt(min, max)\n"
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" rng.RollDouble(min, max)\n"
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" rng.RollNormal(mean, std_deviation)\n"
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" rng.RollBool(chance_of_true)\n"
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" rng.BlastDistributions()\n\n"
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));*/
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return CR_OK;
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}
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DFhackCExport command_result plugin_shutdown (color_ostream &out)
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{
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return CR_OK;
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}
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DFhackCExport command_result plugin_onstatechange(color_ostream &out, state_change_event event)
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{
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return CR_OK;
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}
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#pragma region "EnginesKeeper Stuff"
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class EnginesKeeper
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{
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private:
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EnginesKeeper() {}
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std::unordered_map<uint16_t, std::mt19937_64> m_engines;
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uint16_t counter = 0;
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public:
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static EnginesKeeper& Instance()
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{
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static EnginesKeeper instance;
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return instance;
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}
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uint16_t NewEngine( uint64_t seed )
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{
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std::mt19937_64 engine( seed != 0 ? seed : std::chrono::system_clock::now().time_since_epoch().count() );
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m_engines[++counter] = engine;
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return counter;
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}
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void DestroyEngine( uint16_t id )
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{
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m_engines.erase( id );
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}
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void NewSeed( uint16_t id, uint64_t seed )
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{
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CHECK_INVALID_ARGUMENT( m_engines.find( id ) != m_engines.end() );
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m_engines[id].seed( seed != 0 ? seed : std::chrono::system_clock::now().time_since_epoch().count() );
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}
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std::mt19937_64& RNG( uint16_t id )
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{
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CHECK_INVALID_ARGUMENT( m_engines.find( id ) != m_engines.end() );
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return m_engines[id];
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}
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};
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#pragma endregion
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#pragma region "EngineKeeper Wrappers"
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uint16_t GenerateEngine( uint64_t seed )
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{
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return EnginesKeeper::Instance().NewEngine( seed );
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}
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void DestroyEngine( uint16_t id )
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{
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EnginesKeeper::Instance().DestroyEngine( id );
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}
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void NewSeed( uint16_t id, uint64_t seed )
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{
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EnginesKeeper::Instance().NewSeed( id, seed );
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}
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#pragma endregion
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#pragma region "std Distribution Rollers"
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int rollInt(uint16_t id, int min, int max)
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{
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std::uniform_int_distribution<int> ND(min, max);
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return ND(EnginesKeeper::Instance().RNG(id));
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}
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double rollDouble(uint16_t id, double min, double max)
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{
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std::uniform_real_distribution<double> ND(min, max);
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return ND(EnginesKeeper::Instance().RNG(id));
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}
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double rollNormal(uint16_t id, double mean, double stddev)
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{
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std::normal_distribution<double> ND(mean, stddev);
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return ND(EnginesKeeper::Instance().RNG(id));
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}
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bool rollBool(uint16_t id, float p)
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{
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std::bernoulli_distribution ND(p);
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return ND(EnginesKeeper::Instance().RNG(id));
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}
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#pragma endregion
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#pragma region "Number Sequence Stuff"
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class NumberSequence
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{
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private:
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unsigned short m_position = 0;
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std::vector<int64_t> m_numbers;
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public:
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NumberSequence(){}
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NumberSequence( int64_t start, int64_t end )
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{
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for( int64_t i = start; i <= end; ++i )
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{
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m_numbers.push_back( i );
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}
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}
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void Add( int64_t num ) { m_numbers.push_back( num ); }
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void Reset() { m_numbers.clear(); }
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int64_t Next()
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{
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if(m_position >= m_numbers.size())
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{
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m_position = 0;
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}
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return m_numbers[m_position++];
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}
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void Shuffle( uint16_t id )
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{
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std::shuffle( std::begin( m_numbers ), std::end( m_numbers ), EnginesKeeper::Instance().RNG( id ) );
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}
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void Print()
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{
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char buffer1[256] = {0};
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char buffer2[256] = {0};
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for( auto v : m_numbers )
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{
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sprintf( buffer2, "%s%d", buffer1, v );
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sprintf( buffer1, "%s ", buffer2 );
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}
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cout->print( buffer1 );
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}
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};
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class SequenceKeeper
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{
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private:
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SequenceKeeper() {}
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std::unordered_map<uint16_t, NumberSequence> m_sequences;
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uint16_t counter = 0;
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public:
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static SequenceKeeper& Instance()
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{
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static SequenceKeeper instance;
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return instance;
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}
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uint16_t MakeNumSequence( int64_t start, int64_t end )
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{
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m_sequences[++counter] = NumberSequence( start, end );
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return counter;
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}
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uint16_t MakeNumSequence()
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{
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m_sequences[++counter] = NumberSequence();
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return counter;
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}
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void DestroySequence( uint16_t id )
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{
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m_sequences.erase( id );
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}
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void AddToSequence( uint16_t id, int64_t num )
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{
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CHECK_INVALID_ARGUMENT( m_sequences.find( id ) != m_sequences.end() );
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m_sequences[id].Add( num );
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}
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void Shuffle( uint16_t id, uint16_t rng_id )
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{
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CHECK_INVALID_ARGUMENT( m_sequences.find( id ) != m_sequences.end() );
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m_sequences[id].Shuffle( rng_id );
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}
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int64_t NextInSequence( uint16_t id )
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{
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CHECK_INVALID_ARGUMENT( m_sequences.find( id ) != m_sequences.end() );
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return m_sequences[id].Next();
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}
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void PrintSequence( uint16_t id )
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{
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CHECK_INVALID_ARGUMENT( m_sequences.find( id ) != m_sequences.end() );
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auto seq = m_sequences[id];
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seq.Print();
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}
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};
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#pragma endregion
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#pragma region "Sequence Wrappers"
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uint16_t MakeNumSequence( int64_t start, int64_t end )
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{
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if( start == end )
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{
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return SequenceKeeper::Instance().MakeNumSequence();
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}
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return SequenceKeeper::Instance().MakeNumSequence( start, end );
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}
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void DestroyNumSequence( uint16_t id )
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{
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SequenceKeeper::Instance().DestroySequence( id );
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}
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void AddToSequence( uint16_t id, int64_t num )
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{
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SequenceKeeper::Instance().AddToSequence( id, num );
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}
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void ShuffleSequence( uint16_t rngID, uint16_t id )
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{
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SequenceKeeper::Instance().Shuffle( id, rngID );
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}
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int64_t NextInSequence( uint16_t id )
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{
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return SequenceKeeper::Instance().NextInSequence( id );
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}
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void DebugSequence( uint16_t id )
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{
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SequenceKeeper::Instance().PrintSequence( id );
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}
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#pragma endregion
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DFHACK_PLUGIN_LUA_FUNCTIONS {
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DFHACK_LUA_FUNCTION(GenerateEngine),
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DFHACK_LUA_FUNCTION(DestroyEngine),
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DFHACK_LUA_FUNCTION(NewSeed),
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DFHACK_LUA_FUNCTION(rollInt),
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DFHACK_LUA_FUNCTION(rollDouble),
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DFHACK_LUA_FUNCTION(rollNormal),
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DFHACK_LUA_FUNCTION(rollBool),
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DFHACK_LUA_FUNCTION(MakeNumSequence),
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DFHACK_LUA_FUNCTION(DestroyNumSequence),
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DFHACK_LUA_FUNCTION(AddToSequence),
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DFHACK_LUA_FUNCTION(ShuffleSequence),
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DFHACK_LUA_FUNCTION(NextInSequence),
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DFHACK_LUA_FUNCTION(DebugSequence),
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DFHACK_LUA_END
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};
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