Fixed betting bugs.

src/util/array.c

@@ -123,4 +123,17 @@ void arraySplice(
   // Now copy it back into the original array
   arrayCopy(size, temporary, takeLength, arrayGet(size, array, start));
   free(temporary);
+}
+
+
+int32_t arraySum(
+  size_t size, void *array, int32_t length, arraysumcallback_t *callback
+) {
+  int32_t i, count;
+  count = 0;
+  for(i = 0; i < length; i++) {
+    if(!callback(arrayGet(size, array, i))) continue;
+    count++;
+  }
+  return count;
 }

src/util/array.h

@@ -18,6 +18,13 @@
  */
 typedef int32_t arraysort_t(const void*, const void*);
 
+/**
+ * Callback used when calculating the sum of an array that match a state.
+ * @param item Item within the array.
+ * @return True if counted, otherwise false.
+ */
+typedef bool arraysumcallback_t(void*);
+
 /**
  * Retreive the pointer to an elment within the array of unknown type.
  * 
@@ -149,4 +156,18 @@ void arrayRewind(size_t size, void *source, int32_t length, int32_t start,
  */
 void arraySplice(
   size_t size, void *array, int32_t start, int32_t count, int32_t length
+);
+
+/**
+ * Sums the count of items that match a given filter in an array. The filter
+ * is a callback method that the user can define.
+ * 
+ * @param size Size of each element within the array.
+ * @param array Array itself.
+ * @param length Length of the array.
+ * @param callback Callback that will return true/false when called.
+ * @return The count of items that matched the callback invokation.
+ */
+int32_t arraySum(
+  size_t size, void *array, int32_t length, arraysumcallback_t *callback
 );

src/util/math.h

@@ -73,4 +73,11 @@
  * @param n Number to sign.
  * @returns The signed number.
  */
-#define mathSign(n) (n>=0 ? 1.0f : -1.0f)
+#define mathSign(n) (n>=0 ? 1.0f : -1.0f)
+
+/**
+ * Round a number down to the nearest whole number.
+ * @param n Floating number to round down.
+ * @returns The floor of the input.
+ */
+#define mathFloor(n) (floorf(n))