main.cpp File Reference

Benchmark driver comparing BitBully against Pascal Pons' Connect-4 solver. More...

#include <chrono>
#include <fstream>
#include <iomanip>
#include <iostream>
#include <numeric>
#include <sstream>
#include <string>
#include <thirdParty/connect4/Solver.hpp>
#include <tuple>
#include <unordered_map>
#include <vector>
#include "BitBully.h"
#include "Board.h"

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Typedefs
using	Clock = std::chrono::high_resolution_clock
	Wall-clock used for the per-call timing measurements.

Functions
void	writeToCSV (const std::vector< std::tuple< float, float > > &data, const std::string &filename)
	Persist per-position timing pairs to a CSV file.
std::unordered_map< std::string, std::string >	parseArgs (const int argc, const char *const argv[])
	Parse --key value pairs from the program command line.
int	main (const int argc, const char *const argv[])
	Entry point of the benchmark binary.

Detailed Description

Benchmark driver comparing BitBully against Pascal Pons' Connect-4 solver.

Generates a stream of random positions, asks both solvers to evaluate them with full perfect-play depth and compares the resulting scores. Per-call solve times are dumped to a CSV for offline analysis.

Command-line flags:

• --nply N : number of stones in each generated position (default 8)
• --nrepeats N : number of positions to evaluate (default 1000)
• --filename PATH : output CSV file
• --reset_tt N : reset both transposition tables every N positions

Definition in file main.cpp.

Typedef Documentation

Clock

using Clock = std::chrono::high_resolution_clock

Wall-clock used for the per-call timing measurements.

Resolves to std::chrono::steady_clock on Windows (because high_resolution_clock is not actually high-resolution there) and to std::chrono::high_resolution_clock everywhere else.

Definition at line 42 of file main.cpp.

Function Documentation

main()

int main	(	const int	argc,
		const char *const	argv[] )

Entry point of the benchmark binary.

Parameters

argc	Number of CLI arguments (as forwarded by the OS).
argv	CLI arguments.

Returns

0 on success, EXIT_FAILURE if the two solvers disagree on any position or on argument-parsing errors.

Examples

quick_solve.cpp, score_all_moves.cpp, and with_opening_book.cpp.

Definition at line 108 of file main.cpp.

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parseArgs()

std::unordered_map< std::string, std::string > parseArgs	(	const int	argc,
		const char *const	argv[] )

Parse --key value pairs from the program command line.

Exits with EXIT_FAILURE if a key is missing its value.

Parameters

argc	Number of CLI tokens (as received by main).
argv	CLI tokens.

Returns

Map from each --key token to its associated value.

Definition at line 84 of file main.cpp.

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writeToCSV()

void writeToCSV	(	const std::vector< std::tuple< float, float > > &	data,
		const std::string &	filename )

Persist per-position timing pairs to a CSV file.

The file is written with header Bitbully,Pons-C4 and one row per (BitBully, Pons-C4) timing tuple, with five-digit fixed precision.

Parameters

data	Pairs of (time_bitbully, time_pons_c4) in seconds.
filename	Destination CSV path.

Definition at line 54 of file main.cpp.

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