typedef signed long int32_t;
typedef signed long long int64_t;
-#if __LP64__
+#ifdef __LP64__
typedef uint64_t intptr_t;
typedef uint64_t uintptr_t;
+typedef int64_t ptrdiff_t;
#else
typedef uint32_t intptr_t;
typedef uint32_t uintptr_t;
+typedef int32_t ptrdiff_t;
#endif
#if 0
# error "Unknown pointer size"
#endif
+
#endif