Deference char pointer to test for empty string instead of strlen(3).

[nmh] / sbr / seq_nameok.c

diff --git a/sbr/seq_nameok.c b/sbr/seq_nameok.c
index 66319b5ef4368ffcb8701416f1d1a13722192d59..328bd5c2633027a5fb94efdf20b3a563815fdf26 100644 (file)
--- a/sbr/seq_nameok.c
+++ b/sbr/seq_nameok.c
@@ -2,7 +2,9 @@
 /*
  * seq_nameok.c -- check if a sequence name is ok
  *
- * $Id$
+ * This code is Copyright (c) 2002, by the authors of nmh.  See the
+ * COPYRIGHT file in the root directory of the nmh distribution for
+ * complete copyright information.
  */
 
 #include <h/mh.h>
@@ -36,7 +38,7 @@ seq_nameok (char *s)
      * First character in a sequence name must be
      * an alphabetic character ...
      */
-    if (!isalpha (*s)) {
+    if (!isalpha ((unsigned char) *s)) {
        advise (NULL, "illegal sequence name: %s", s);
        return 0;
     }
@@ -45,7 +47,7 @@ seq_nameok (char *s)
      * and can be followed by zero or more alphanumeric characters
      */
     for (pp = s + 1; *pp; pp++)
-       if (!isalnum (*pp)) {
+       if (!isalnum ((unsigned char) *pp)) {
            advise (NULL, "illegal sequence name: %s", s);
            return 0;
        }