Add the basic code to make othello playable without any rule checks

[Project_algorithmic_C.git] / lib / othello.c

diff --git a/lib/othello.c b/lib/othello.c
index 0cd65a4d0a266e57c6cda3e87bd263877d629ff7..02eac9d82cad3c92011b35f03d4ca30e3e8262fc 100644 (file)
--- a/lib/othello.c
+++ b/lib/othello.c
@@ -16,4 +16,87 @@
  * =====================================================================================
  */
 
+#include <stdlib.h>
+#include <stdbool.h>
 
+#include "othello.h"
+
+unsigned int current_player(unsigned int round_count) {
+   
+    if (round_count % 2 != 0) {
+        return player_two;
+    } else {
+        return player_one;
+    }
+}
+
+/* for consitency with ncurses, the board coordinates are in the following order:
+ * --x-->
+ * |
+ * y
+ * |
+ * v */
+
+unsigned int get_box_value(int y, int x, unsigned int pawn_array[board_size][board_size]) {
+   
+    return pawn_array[y][x];
+}
+
+bool is_box_type(int y, int x, unsigned int pawn_array[board_size][board_size], unsigned int type) {
+
+    if (type > 2) {
+        return NULL;
+    }
+    if (get_box_value(y, x, pawn_array) == type) {
+        return true;
+    } else {
+        return false;
+    }
+}
+
+/* helper function to set a value != empty at the (y, x) in the pawns array */
+int** set_pawn(int y, int x, unsigned int type, unsigned int pawn_array[board_size][board_size]) {
+
+    if (is_box_type(y, x, pawn_array, empty)) {
+        pawn_array[y][x] = type;
+        return pawn_array;
+    } else {
+        return NULL;
+    }
+}
+
+static int** zero_pawns(unsigned int pawn_array[board_size][board_size]) {
+    for (unsigned int i = 0; i < board_size; i++) {
+        for (unsigned int j = 0; j < board_size; j++) {
+            pawn_array = set_pawn(i, j, empty, pawn_array);
+         }
+    }
+    return pawn_array;
+}
+
+/* set the pawns in the start position */
+int** init_pawns(unsigned int pawn_array[board_size][board_size]) {
+
+    pawn_array = zero_pawns(pawn_array);
+    pawn_array = set_pawn(5, 4, black, pawn_array);
+    pawn_array = set_pawn(4, 5, black, pawn_array);
+    pawn_array = set_pawn(4, 4, white, pawn_array);
+    pawn_array = set_pawn(5, 5, white, pawn_array);
+    return pawn_array;
+}
+
+unsigned int count_pawn_type(unsigned int pawn_array[board_size][board_size], unsigned int type) {
+    unsigned int count = 0;
+
+    if (type > 2) {
+        return -1;
+    }
+    for (unsigned int i = 0; i < board_size; i++) {
+        for (unsigned int j = 0; j < board_size; j++) {
+            if (pawn_array[i][j] == type) {
+                count++;
+            }
+        }
+    }
+    return count;
+}