games/microballs/mballs.c

   1 /*
   2  * mballs: An amazing micro-balls game!
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  *
  18  * Luiz Fernando N. Capitulino
  19  * <lcapitulino@gmail.com>
  20  */
  21 #include <stdio.h>
  22 #include <string.h>
  23 #include <stdlib.h>
  24 #include "mballs.h"
  25 #include "board.h"
  26 #include "computer.h"
  27 #include "misc.h"
  28
  29 enum game_piece current_player = GAME_PLAYER1;
  30
  31 /* set_next_player(): select who plays next */
  32 static void set_next_player(void)
  33 {
  34         if (current_player == GAME_PLAYER1)
  35                 current_player = GAME_PLAYER2;
  36         else
  37                 current_player = GAME_PLAYER1;
  38 }
  39
  40 /* read_input(): read input from user */
  41 static void read_input(struct user_move *move)
  42 {
  43         char line[32];
  44
  45         move->from_row = move->from_col = 0;
  46         move->to_row = move->to_col = 0;
  47
  48         memset(line, '\0', sizeof(line));
  49         fgets(line, sizeof(line), stdin);
  50         sscanf(line, "%c%d-%c%d\n", (char *) &move->from_row, &move->from_col,
  51                (char *) &move->to_row, &move->to_col);
  52 }
  53
  54 /* get_next_move(): read the next move from the user */
  55 static void get_next_move(const struct game_board *board,
  56                           struct user_move *move)
  57 {
  58         if (is_computer_turn()) {
  59                 computer_move(board, move);
  60                 return;
  61         }
  62
  63         print_message("Player '%c' turn: ", current_player);
  64         read_input(move);
  65
  66         move->from_row -= 'a';
  67         move->from_col--;
  68
  69         move->to_row -= 'a';
  70         move->to_col--;
  71 }
  72
  73 static void usage(void)
  74 {
  75         printf("mballs [ -h ] [ -c ] [ -e<size> ]\n");
  76 }
  77
  78 int main(int argc, char *argv[])
  79 {
  80         enum game_state st;
  81         struct user_move move;
  82         struct game_board board;
  83         int size = BOARD_DEF_SIZE;
  84
  85         if (argc > 3) {
  86                 fprintf(stderr, "ERROR: supports only 3 options\n");
  87                 usage();
  88                 exit(1);
  89         }
  90
  91         if (argc >= 2) {
  92                 if (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help")) {
  93                         usage();
  94                         exit(0);
  95                 }
  96
  97                 if (!strcmp(argv[1], "-c"))
  98                         computer_init();
  99
 100                 if (argc == 3 && !memcmp(argv[2], "-e", 2)) {
 101                         size = (int) strtol(argv[2] + 2, NULL, 10);
 102                         if (size <= BOARD_DEF_SIZE || size > BOARD_MAX_SIZE) {
 103                                 fprintf(stderr,
 104                                         "ERROR: invalid board size: %d\n", size);
 105                                 exit(1);
 106                         }
 107                 }
 108         }
 109
 110         board_init(&board, size);
 111
 112         for (;;) {
 113                 board_draw(&board);
 114
 115                 get_next_move(&board, &move);
 116
 117                 st = board_move(&board, &move);
 118                 if (st == GAME_REST_TURN)
 119                         continue;
 120                 else if (st == GAME_FINISHED)
 121                         break;
 122
 123                 set_next_player();
 124         }
 125
 126         board_draw(&board);
 127         print_message("%c won!!\n\n", current_player);
 128         return 0;
 129 }