[libc] Add isxdigit()

Signed-off-by: Piotr Jaroszyński <p.jaroszynski@gmail.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>

diff --git a/src/include/ctype.h b/src/include/ctype.h
index ed4d884697f7180346e817243e1725fb819b0d69..9f5127bf1cdf7ef49c54a12f4e6eb4e477dec579 100644 (file)
--- a/src/include/ctype.h
+++ b/src/include/ctype.h
@@ -11,6 +11,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
 #define isdigit(c)     ((c) >= '0' && (c) <= '9')
 #define islower(c)     ((c) >= 'a' && (c) <= 'z')
 #define isupper(c)     ((c) >= 'A' && (c) <= 'Z')
+#define isxdigit(c)    (isdigit(c) || ((c) >= 'A' && (c) <= 'F') || ((c) >= 'a' && (c) <= 'f'))
 
 static inline unsigned char tolower(unsigned char c)
 {