Added rewind method.

src/util/array.c

@@ -86,4 +86,22 @@ int32_t arrayFindString(char **array, int32_t arrayLength, char *value) {
     if(strcmp(array[i], value) == 0) return i;
   }
   return -1;
+}
+
+void arrayRewind(size_t size, void *source, int32_t length, int32_t start,
+  int32_t count
+) {
+  if(count == -1) count = length - start;
+
+  // Create a temporary new array to house the data.
+  void *temporary = malloc(size * count);
+  
+  // Copy the data from the source to the temporary array.
+  arrayCopy(size, arrayGet(size, source, start), count, temporary);
+
+  // Now copy the data back to the source array.
+  arrayCopy(size, temporary, count, source);
+
+  // Cleanup the temporary array.
+  free(temporary);
 }

src/util/array.h

@@ -99,4 +99,19 @@ int32_t _arraySorterUint8(const void* left, const void* right);
  * @param value The value to search for.
  * @return The index that the strings exists within the array.
  */
-int32_t arrayFindString(char **array, int32_t arrayLength, char *value);
+int32_t arrayFindString(char **array, int32_t arrayLength, char *value);
+
+/**
+ * Rewinds an array backwards. This is used to take an array that has some data
+ * used towards the end of an array, but the data near the start is no longer
+ * used. This will take the end data and put it back at the start.
+ * 
+ * @param size The size of each element within the array.
+ * @param source The array itself.
+ * @param length The total length of the array.
+ * @param start The first index within the array that you want to keep.
+ * @param count Count of items after start to use. Use -1 to take the remaining.
+ */
+void arrayRewind(size_t size, void *source, int32_t length, int32_t start,
+  int32_t end
+);