Add is_xdigit() predicate.

git-svn-id: svn+ssh://svn.openpam.org/svn/openpam/trunk@759 185d5e19-27fe-0310-9dcf-9bff6b9f3609
2014-01-24 13:44:34 +00:00 · 2014-01-24 13:44:34 +00:00 · 9e9207fd5d
parent 3d0d4da447
commit 9e9207fd5d
1 changed files with 8 additions and 0 deletions
--- a/lib/libpam/openpam_ctype.h
+++ b/lib/libpam/openpam_ctype.h
@ -38,6 +38,14 @@
 #define is_digit(ch)				\
 	(ch >= '0' && ch <= '9')

+/*
+ * Evaluates to non-zero if the argument is a hex digit.
+ */
+#define is_xdigit(ch)				\
+	((ch >= '0' && ch <= '9') ||		\
+	 (ch >= 'a' && ch <= 'f') ||		\
+	 (ch >= 'A' && ch <= 'F'))
+
 /*
 * Evaluates to non-zero if the argument is an uppercase letter.
 */