Move CGI sources to their own subdirectory

[onak.git] / keyarray.h

diff --git a/keyarray.h b/keyarray.h
index a3e288aae656da90d0416f1aa0efa2bd9ab07857..e50a030c4ec2dd576d0040ad62e85b54484d9701 100644 (file)
--- a/keyarray.h
+++ b/keyarray.h
@@ -14,8 +14,7 @@
  * more details.
  *
  * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef __KEYARRAY_H__
@@ -65,4 +64,20 @@ void array_free(struct keyarray *array);
  */
 bool array_add(struct keyarray *array, struct openpgp_fingerprint *fp);
 
+/**
+ * @brief Compare two OpenPGP fingerprints
+ * @param a Fingerprint 1
+ * @param b Fingerprint 2
+ *
+ * Compares 2 OpenPGP fingerprints, returning an integer less than, equal to,
+ * or greater than zero depending on whether a is less than, matches, or is
+ * greater than b.
+ *
+ * For the purposes of comparison shorter fingerprints sort earlier than
+ * longer fingerprints (i.e. v3 < v4 < v5) and comparison of same-length
+ * fingerprints treats them as a numberical value.
+ */
+int fingerprint_cmp(struct openpgp_fingerprint *a,
+               struct openpgp_fingerprint *b);
+
 #endif /* __KEYARRAY_H__ */