AnnaConnect/connect4.c

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * AnnaConnect is a silly little text-based connect 4 game c:
 * Copyright (C) 2025 Anna Snoeijs. anna.snoeijs@hotmail.com
 *
 * This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 2 of the License
 *  (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <limits.h>
#include <string.h>
#include "macros.h"
#include "config.h"
#include "logic.h"
#include "types.h"
#include "ui.h"
#include "commandline.h"

int main(
#ifndef NO_OPTIONS // [[maybe_unused]] is unsupported in C99, so this will do
	int argc, char *argv[]
#endif /* ! NO_OPTIONS */
){
	// Initialise variables
	board_t playboard = {
		.player = 0,
		.rows = BOARD_HEIGHT,
		.columns = BOARD_WIDTH,
		.count0 = {0},
		.count1 = {0},
	};
	wins_t *wins = malloc( sizeof(wins_t) );
#ifndef NO_OPTIONS
	FILE *outputfile = NULL;
	char *filename = NULL;
	bool randomMoves = 0;
	switch(
		parseArgs(
			 argc,
			 argv,
			&playboard,
			&wins,
			&outputfile,
			&filename,
			&randomMoves
		)
	){
		case -1: return -1;
		case 0: break;
		case 1: return 0;
		default: return -1;
	}
#endif /* ! NO_OPTIONS */
	// Start the actual program
	printf(
		VERSIONSTRING
		"AnnaConnect comes with ABSOLUTELY NO WARRANTY\n"
		"This is free software, and you are welcome to redistribute it\n"
		"under certain condtions."
#ifndef NO_OPTIONS
		" See `%s --license`\n", argv[0]
#else  /* NO_OPTIONS */
		"\n"
#endif /* NO_OPTIONS */
	);
	// board, innit?
	// Allocate the board
	playboard.height = calloc( playboard.columns, sizeof(rowsint_t) );
	playboard.column = calloc( playboard.columns, sizeof(column_t)  );
	if( playboard.height == NULL || playboard.column == NULL ){
		fprintf( stderr, "ERROR: COULD NOT ALLOCATE BOARD\n" );
		return 1;
	}
	// Initialize wins struct if used
	if( wins != NULL ){
		wins->win0               = calloc( playboard.columns, sizeof(column_t) );
		wins->win1               = calloc( playboard.columns, sizeof(column_t) );
		wins->same.vertical2     = calloc( playboard.columns, sizeof(column_t) );
		wins->same.horizontal2   = calloc( playboard.columns, sizeof(column_t) );
		wins->same.diagonalUp2   = calloc( playboard.columns, sizeof(column_t) );
		wins->same.diagonalDown2 = calloc( playboard.columns, sizeof(column_t) );
		wins->same.vertical4     = calloc( playboard.columns, sizeof(column_t) );
		wins->same.horizontal4   = calloc( playboard.columns, sizeof(column_t) );
		wins->same.diagonalUp4   = calloc( playboard.columns, sizeof(column_t) );
		wins->same.diagonalDown4 = calloc( playboard.columns, sizeof(column_t) );
	}
	initBoard( playboard );
	// Begin loopin
#ifndef NO_OPTIONS
	if( outputfile != NULL ){
		fprintf(
			outputfile,
			"# File generated by " VERSIONSTRING
			"# Here's the board size\n"
			"--rows %d\n"
			"--columns %d\n"
			"# Now follows the moves taken, zero indexed\n"
			,
			playboard.rows,
			playboard.columns
		);
	}
#endif /* ! NO_OPTIONS */
	for(;; playboard.player = !playboard.player ){
		columnsint_t column;
#ifndef NO_OPTIONS
		if( randomMoves ){
			column = randomColumn( playboard );
		}else{
			column = askColumn( playboard );
		};
#else  /* NO_OPTIONS */
		column = askColumn( playboard );
#endif /* NO_OPTIONS */
		if( column == QUITCOLUMN ) break;
		playMove( &playboard, column );
		calcWins( wins, &playboard, column );
		updateBoard( playboard, column );
#ifndef NO_OPTIONS
		if( outputfile != NULL ){
			fprintf( outputfile, "%d\n", column );
		}
#endif /* ! NO_OPTIONS */
	}
#ifndef NO_OPTIONS
	if( outputfile != NULL ){
		fprintf( outputfile,
			"# Wins\n"
			"{\n"
			"total,%d,%d\n"
			"horizontal,%d,%d\n"
			"vertical,%d,%d\n"
			"diagonalUp,%d,%d\n"
			"diagonalDown,%d,%d\n"
			"}\n",
			playboard.count0.total,        playboard.count1.total,
			playboard.count0.horizontal,   playboard.count1.horizontal,
			playboard.count0.vertical,     playboard.count1.vertical,
			playboard.count0.diagonalUp,   playboard.count1.diagonalUp,
			playboard.count0.diagonalDown, playboard.count1.diagonalDown
		);
		fclose( outputfile );
		printf( "Output is written to %s\n", filename );
	}
#endif /* ! NO_OPTIONS */
	exit_ui();
}