Add more test cases for GptInit() and fixed some bugs

src/platform/vboot_reference/cgptlib/quick_sort.h

+/* Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#ifndef VBOOT_REFERENCE_QSORT_H_
+#define VBOOT_REFERENCE_QSORT_H_
+
+#define MAX_QUICK_SORT_ELEMENT_SIZE 512
+
+/* QuickSort() is an in-place, and unstable quick sort implementation.
+ * Given a compare function, this function sorts elements for you.
+ * 'elements' points to the base of un-sorted array.
+ * 'number_of_elements' indicates the number of elements in array.
+ * 'size' indicates the size (in bytes) of an element unit.
+ * The 'compare_function' should return true if 'a' precedes 'b'.
+ *
+ * NOTE: For performance issue, we reserve a static buffer for swap.
+ *       So that the 'size' cannot exceed the buffer size
+ *       (MAX_QUICK_SORT_ELEMENT_SIZE). */
+void QuickSort(void *elements, int number_of_elements, int size,
+               int (*compare_function)(const void *a, const void *b));
+
+#endif  /* VBOOT_REFERENCE_QSORT_H_ */