| 1 | /* |
| 2 | * ===================================================================================== |
| 3 | * |
| 4 | * Filename: othello.c |
| 5 | * |
| 6 | * Description: Handle the othello board content |
| 7 | * |
| 8 | * Version: 1.0 |
| 9 | * Created: 25/04/2017 15:16:08 |
| 10 | * Revision: none |
| 11 | * Compiler: gcc |
| 12 | * |
| 13 | * Author: Jerome Benoit (fraggle), jerome.benoit@piment-noir.org |
| 14 | * Organization: Piment Noir |
| 15 | * |
| 16 | * ===================================================================================== |
| 17 | */ |
| 18 | |
| 19 | #include <stdlib.h> |
| 20 | #include <stdbool.h> |
| 21 | |
| 22 | #include "othello.h" |
| 23 | |
| 24 | unsigned int current_player(unsigned int round_count) { |
| 25 | |
| 26 | if (round_count % 2 != 0) { |
| 27 | return player_two; |
| 28 | } else { |
| 29 | return player_one; |
| 30 | } |
| 31 | } |
| 32 | |
| 33 | /* for consitency with ncurses, the board coordinates are in the following order: |
| 34 | * --x--> |
| 35 | * | |
| 36 | * y |
| 37 | * | |
| 38 | * v */ |
| 39 | |
| 40 | unsigned int get_box_value(int y, int x, unsigned int pawn_array[board_size][board_size]) { |
| 41 | |
| 42 | return pawn_array[y][x]; |
| 43 | } |
| 44 | |
| 45 | bool is_box_type(int y, int x, unsigned int pawn_array[board_size][board_size], unsigned int type) { |
| 46 | |
| 47 | if (type > 2) { |
| 48 | return NULL; |
| 49 | } |
| 50 | if (get_box_value(y, x, pawn_array) == type) { |
| 51 | return true; |
| 52 | } else { |
| 53 | return false; |
| 54 | } |
| 55 | } |
| 56 | |
| 57 | /* helper function to set a value != empty at the (y, x) in the pawns array */ |
| 58 | int** set_pawn(int y, int x, unsigned int type, unsigned int pawn_array[board_size][board_size]) { |
| 59 | |
| 60 | if (is_box_type(y, x, pawn_array, empty)) { |
| 61 | pawn_array[y][x] = type; |
| 62 | return pawn_array; |
| 63 | } else { |
| 64 | return NULL; |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | static int** zero_pawns(unsigned int pawn_array[board_size][board_size]) { |
| 69 | for (unsigned int i = 0; i < board_size; i++) { |
| 70 | for (unsigned int j = 0; j < board_size; j++) { |
| 71 | pawn_array = set_pawn(i, j, empty, pawn_array); |
| 72 | } |
| 73 | } |
| 74 | return pawn_array; |
| 75 | } |
| 76 | |
| 77 | /* set the pawns in the start position */ |
| 78 | int** init_pawns(unsigned int pawn_array[board_size][board_size]) { |
| 79 | |
| 80 | pawn_array = zero_pawns(pawn_array); |
| 81 | pawn_array = set_pawn(5, 4, black, pawn_array); |
| 82 | pawn_array = set_pawn(4, 5, black, pawn_array); |
| 83 | pawn_array = set_pawn(4, 4, white, pawn_array); |
| 84 | pawn_array = set_pawn(5, 5, white, pawn_array); |
| 85 | return pawn_array; |
| 86 | } |
| 87 | |
| 88 | unsigned int count_pawn_type(unsigned int pawn_array[board_size][board_size], unsigned int type) { |
| 89 | unsigned int count = 0; |
| 90 | |
| 91 | if (type > 2) { |
| 92 | return -1; |
| 93 | } |
| 94 | for (unsigned int i = 0; i < board_size; i++) { |
| 95 | for (unsigned int j = 0; j < board_size; j++) { |
| 96 | if (pawn_array[i][j] == type) { |
| 97 | count++; |
| 98 | } |
| 99 | } |
| 100 | } |
| 101 | return count; |
| 102 | } |