-typedef signed int ssize_t;
-#define INT8_MAX 127
-#define INT8_MIN -128
-#define UINT8_MAX 255
-#define INT16_MAX 32767
-#define INT16_MIN -32768
-#define UINT16_MAX 65535
-#define INT32_MAX 2147483647
-#define INT32_MIN -2147483648
-#define UINT32_MAX 4294967295U
+typedef short int16_t;
+typedef unsigned short uint16_t;
+typedef signed char int8_t;
+typedef unsigned char uint8_t;
+typedef signed int ssize_t;
+#ifndef INT8_MAX
+# define INT8_MAX 127
+#endif
+#ifndef INT8_MIN
+# define INT8_MIN -128
+#endif
+#ifndef UINT8_MAX
+# define UINT8_MAX 255
+#endif
+#ifndef INT16_MAX
+# define INT16_MAX 32767
+#endif
+#ifndef INT16_MIN
+# define INT16_MIN -32768
+#endif
+#ifndef UINT16_MAX
+# define UINT16_MAX 65535
+#endif
+#ifndef INT32_MAX
+# define INT32_MAX 2147483647
+#endif
+#ifndef INT32_MIN
+/* MSC treats -2147483648 as -(2147483648U). */
+# define INT32_MIN (-INT32_MAX - 1)
+#endif
+#ifndef UINT32_MAX
+# define UINT32_MAX 4294967295U
+#endif
+/* Certain compatibility updates to VC++ introduce the `cstdint'
+ * header, which defines the INT*_C macros. On default installs they
+ * are absent. */
+#ifndef INT8_C
+# define INT8_C(C) C##i8
+#endif
+#ifndef UINT8_C
+# define UINT8_C(C) C##ui8
+#endif
+#ifndef INT16_C
+# define INT16_C(C) C##i16
+#endif
+#ifndef UINT16_C
+# define UINT16_C(C) C##ui16
+#endif
+#ifndef INT32_C
+# define INT32_C(C) C##i32
+#endif
+#ifndef UINT32_C
+# define UINT32_C(C) C##ui32
+#endif
+#ifndef INT64_C
+# define INT64_C(C) C##i64
+#endif
+#ifndef UINT64_C
+# define UINT64_C(C) C##ui64