TP 13 exo2: More routine for

[TD_C.git] / TP_13 / exo2 / lib / coordinates.c

diff --git a/TP_13/exo2/lib/coordinates.c b/TP_13/exo2/lib/coordinates.c
new file mode 100644 (file)
index 0000000..f9123e9
--- /dev/null
+++ b/TP_13/exo2/lib/coordinates.c
@@ -0,0 +1,51 @@
+/*
+ * =====================================================================================
+ *
+ *       Filename:  coordinates.c
+ *
+ *    Description:  Data definition and functions to manipulate elements in the grid
+ *
+ *        Version:  1.0
+ *        Created:  16/03/2017 19:05:02
+ *       Revision:  none
+ *       Compiler:  gcc
+ *
+ *         Author:  Jerome Benoit (fraggle), jerome.benoit@piment-noir.org
+ *   Organization:  Piment Noir
+ *
+ * =====================================================================================
+ */
+
+#include "coordinates.h"
+
+void init_coordinates(coordinates_t* coordinates_array) {
+    for (unsigned i = 0; i < MAX_COORDINATES; i++) {
+        coordinates_array[i] = set_coordinates(0, 0, 0);
+    }
+}
+
+coordinates_t set_coordinates(int y, int x, unsigned type) {
+    coordinates_t new_coordinates;
+
+    new_coordinates.y = y;
+    new_coordinates.x = x;
+    new_coordinates.type = type;
+    return new_coordinates;
+}
+
+unsigned add_coordinates(coordinates_t new_coordinates, coordinates_t* coordinates_array) {
+    /* valid coordinates are in the [1-3] range */
+    if (new_coordinates.y < 1 || new_coordinates.y > 3 || new_coordinates.x < 1 || new_coordinates.x > 3) {
+        return 3; /* error value for invalid coordinates */
+    }
+    for (unsigned i = 0; i < MAX_COORDINATES; i++) {
+        /* check if already entered */
+        if (new_coordinates.y == (coordinates_array + i)->y && new_coordinates.x == (coordinates_array + i)->x) {
+            return 2; /* error value for duplicates */
+        } else if ((coordinates_array + i)->y == 0 && (coordinates_array + i)->x == 0) {
+            coordinates_array[i] = new_coordinates;
+            return 0; /* error value when everything if fine */
+        }
+    }
+    return 1; /* error value for full array */
+}