basic: define HEXDIGITS

define HEXDIGITS alongside DIGITS, and use it where it's already useful.  We'll
use it again shortly when parsing MAC addresses.

diff --git a/src/basic/string-util.h b/src/basic/string-util.h
index ad0c813761ed9dc81dd9aa254b54421719cc0b20..139cc8c91b42bb551fed22c2215fd4922b272e49 100644 (file)
--- a/src/basic/string-util.h
+++ b/src/basic/string-util.h
@@ -37,6 +37,7 @@
 #define UPPERCASE_LETTERS "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
 #define LETTERS           LOWERCASE_LETTERS UPPERCASE_LETTERS
 #define ALPHANUMERICAL    LETTERS DIGITS
+#define HEXDIGITS         DIGITS "abcdefABCDEF"
 
 #define streq(a,b) (strcmp((a),(b)) == 0)
 #define strneq(a, b, n) (strncmp((a), (b), (n)) == 0)