Refactored for ISO C standard

include/limits.h

@@ -12,6 +12,8 @@
 #ifndef _FLC_LIMITS
 #define _FLC_LIMITS
 
+
+#if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE)
 /* 
   Minimum values (POSIX)
   Included in case anyone wants/needs 'em.
@@ -110,7 +112,20 @@
 /* Maximum values */
 #define _POSIX_CLOCKRES_MIN 20000000
 
-/* Numerical limits */
+/* ssize_t size limit*/
+#define SSIZE_MAX 32767
+
+/* Miscellaneous invariants */
+#define NL_ARGMAX 9
+#define NL_LANGMAX 14
+#define NL_MSGMAX 65535
+#define NL_SETMAX 255
+#define NL_TEXTMAX 8192
+#define NZERO 20
+
+#endif
+
+/* Numerical limits as defined in the ISO C standard */
 /* Shorts (Defined as 16-bit) */
 #define SHRT_MAX 32767
 #define SHRT_MIN -32767
@@ -131,21 +146,20 @@
 #define ULLONG_MAX 18446744073709551615ULL
 /* Characters (Defined as 8 bit) */
 #define CHAR_BIT 8
+#if '\xff' > 0
+#define CHAR_MAX 255
+#define CHAR_MIN 0
+#else
 #define CHAR_MAX 127
 #define CHAR_MIN -128
+#endif
 #define SCHAR_MAX 127
 #define SCHAR_MIN -128
 #define UCHAR_MAX 255
+#if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE)
 #define MB_LEN_MAX 4
-/* ssize_t */
-#define SSIZE_MAX 32767
-
-/* Miscellaneous invariants */
-#define NL_ARGMAX 9
-#define NL_LANGMAX 14
-#define NL_MSGMAX 65535
-#define NL_SETMAX 255
-#define NL_TEXTMAX 8192
-#define NZERO 20
+#else
+#define MB_LEN_MAX 1
+#endif
 
 #endif /* ndef _FLC_LIMITS */