X-Git-Url: http://git.marmaro.de/?p=mmh;a=blobdiff_plain;f=sbr%2Fseq_nameok.c;h=54d63eed641bac4d874ced7360c3b8ca95214ff7;hp=6887ac6a309cce6a5e10792f1bfec0173c09418c;hb=18591f8e001ecedbee48a51c1d1f08ebaa1c15c8;hpb=5dd6771b28c257af405d7248639ed0e3bcdce38b

diff --git a/sbr/seq_nameok.c b/sbr/seq_nameok.c
index 6887ac6..54d63ee 100644
--- a/sbr/seq_nameok.c
+++ b/sbr/seq_nameok.c
@@ -1,56 +1,59 @@
-
 /*
- * seq_nameok.c -- check if a sequence name is ok
- *
- * 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.
- */
+** seq_nameok.c -- check if a name is ok for a user-defined sequence
+**
+** 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>
+#include <ctype.h>
 
 
+/*
+** returns true if it is a valid name for a user-defined sequence
+*/
 int
-seq_nameok (unsigned char *s)
+seq_nameok(unsigned char *s)
 {
-    unsigned char *pp;
-
-    if (s == NULL || *s == '\0') {
-	advise (NULL, "empty sequence name");
-	return 0;
-    }
-
-    /*
-     * Make sure sequence name doesn't clash with one
-     * of the `reserved' sequence names.
-     */
-    if (!(strcmp (s, "new") &&
-	  strcmp (s, "all") &&
-	  strcmp (s, "first") &&
-	  strcmp (s, "last") &&
-	  strcmp (s, "prev") &&
-	  strcmp (s, "next"))) {
-	advise (NULL, "illegal sequence name: %s", s);
-	return 0;
-    }
-
-    /*
-     * First character in a sequence name must be
-     * an alphabetic character ...
-     */
-    if (!isalpha (*s)) {
-	advise (NULL, "illegal sequence name: %s", s);
-	return 0;
-    }
-
-    /*
-     * and can be followed by zero or more alphanumeric characters
-     */
-    for (pp = s + 1; *pp; pp++)
-	if (!isalnum (*pp)) {
-	    advise (NULL, "illegal sequence name: %s", s);
-	    return 0;
+	unsigned char *pp;
+
+	if (s == NULL || *s == '\0') {
+		advise(NULL, "empty sequence name");
+		return 0;
+	}
+
+	/*
+	** Make sure sequence name doesn't clash with one
+	** of the `reserved' sequence names.
+	** Note: Accept `cur' here! But why is it treated special? --meillo
+	*/
+	if (strcmp(s, seq_first)==0 || strcmp(s, seq_last)==0 ||
+			strcmp(s, seq_prev)==0 || strcmp(s, seq_next)==0 ||
+			strcmp(s, seq_all)==0 || strcmp(s, seq_beyond)==0) {
+		advise(NULL, "collision with reserved sequence name: `%s'", s);
+		return 0;
+	}
+
+	/*
+	** First character in a sequence name must be
+	** an alphabetic character ...
+	*/
+	if (!isalpha(*s)) {
+		advise(NULL, "sequence name must start with a letter: %s", s);
+		return 0;
+	}
+
+	/*
+	** and can be followed by zero or more alphanumeric characters
+	*/
+	for (pp = s+1; *pp; pp++) {
+		if (!isalnum(*pp)) {
+			advise(NULL, "sequence name must only contain "
+					"letters and digits: %s", s);
+			return 0;
+		}
 	}
 
-    return 1;
+	return 1;
 }