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-rw-r--r--readline/chardefs.h8
1 files changed, 7 insertions, 1 deletions
diff --git a/readline/chardefs.h b/readline/chardefs.h
index a537be2..def3a11 100644
--- a/readline/chardefs.h
+++ b/readline/chardefs.h
@@ -77,11 +77,17 @@
# define isxdigit(c) (isdigit((c)) || ((c) >= 'a' && (c) <= 'f') || ((c) >= 'A' && (c) <= 'F'))
#endif
-#define NON_NEGATIVE(c) ((unsigned char)(c) == (c))
+#if defined (CTYPE_NON_ASCII)
+# define NON_NEGATIVE(c) 1
+#else
+# define NON_NEGATIVE(c) ((unsigned char)(c) == (c))
+#endif
/* Some systems define these; we want our definitions. */
#undef ISPRINT
+/* Beware: these only work with single-byte ASCII characters. */
+
#define ISALNUM(c) (IN_CTYPE_DOMAIN (c) && isalnum (c))
#define ISALPHA(c) (IN_CTYPE_DOMAIN (c) && isalpha (c))
#define ISDIGIT(c) (IN_CTYPE_DOMAIN (c) && isdigit (c))