| 1 | /* ncurses-minesweeper Copyright (c) 2020 Joshua 'joshuas3' Stockin |
| 2 | * <https://joshstock.in> |
| 3 | * <https://github.com/JoshuaS3/ncurses-minesweeper> |
| 4 | * |
| 5 | * This software is licensed and distributed under the terms of the MIT License. |
| 6 | * See the MIT License in the LICENSE file of this project's root folder. |
| 7 | * |
| 8 | * This comment block and its contents, including this disclaimer, MUST be |
| 9 | * preserved in all copies or distributions of this software's source. |
| 10 | */ |
| 11 |
|
| 12 | #include <stdlib.h> |
| 13 |
|
| 14 | #include "../state.h" |
| 15 | #include "kaboom.h" |
| 16 |
|
| 17 | int16_t *list_nearby_cells(game_board *board, uint16_t cell) { |
| 18 | int16_t *cells = (int16_t *)calloc(9, sizeof(int16_t)); |
| 19 | if (cells == NULL) abort(); |
| 20 | uint8_t board_width = board->width; |
| 21 | uint8_t board_height = board->height; |
| 22 | cells[0] = cell - board_width - 1; |
| 23 | cells[1] = cell - board_width; |
| 24 | cells[2] = cell - board_width + 1; |
| 25 | cells[3] = cell - 1; |
| 26 | cells[4] = cell; |
| 27 | cells[5] = cell + 1; |
| 28 | cells[6] = cell + board_width - 1; |
| 29 | cells[7] = cell + board_width; |
| 30 | cells[8] = cell + board_width + 1; |
| 31 | if (cell % board_width == 0) { // left edge |
| 32 | cells[0] = cell; |
| 33 | cells[3] = cell; |
| 34 | cells[6] = cell; |
| 35 | } |
| 36 | if ((cell + 1) % board_width == 0) { // right edge |
| 37 | cells[2] = cell; |
| 38 | cells[5] = cell; |
| 39 | cells[8] = cell; |
| 40 | } |
| 41 | if (cell < board_width) { // top edge |
| 42 | cells[0] = cell; |
| 43 | cells[1] = cell; |
| 44 | cells[2] = cell; |
| 45 | } |
| 46 | if (cell >= board_width * (board_height - 1)) { // bottom edge |
| 47 | cells[6] = cell; |
| 48 | cells[7] = cell; |
| 49 | cells[8] = cell; |
| 50 | } |
| 51 | return cells; |
| 52 | } |
| 53 |
|
| 54 | void recursively_open_nearby_cells(game_board *board, uint16_t cell) { |
| 55 | int16_t *nearby = list_nearby_cells(board, cell); |
| 56 | for (int i = 0; i < 9; i++) { |
| 57 | uint16_t c = nearby[i]; |
| 58 | game_board_cell *x = &board->cells[c]; |
| 59 | if (c != cell && !x->opened && !x->flagged) { |
| 60 | // open unopened cell |
| 61 | x->opened = 1; |
| 62 | if (!x->is_bomb && x->surrounding_bomb_count == 0) |
| 63 | // recursive open if not bomb, 0 surrounding bombs, AND not flagged |
| 64 | recursively_open_nearby_cells(board, c); |
| 65 | else if (x->is_bomb) { |
| 66 | kaboom(board); |
| 67 | return; |
| 68 | } |
| 69 | } |
| 70 | } |
| 71 | free(nearby); |
| 72 | } |
| 73 |
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Index