src/sn_comparator.h: Add Doxygen documentation.

[sort-networks.git] / src / sn_comparator.c

diff --git a/src/sn_comparator.c b/src/sn_comparator.c
index 6bfc611..18361e4 100644 (file)
--- a/src/sn_comparator.c
+++ b/src/sn_comparator.c
@@ -1,3 +1,31 @@
+/**
+ * libsortnetwork - src/sn_comparator.c
+ * Copyright (C) 2008-2010  Florian octo Forster
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; only version 2 of the License is applicable.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for 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 St, Fifth Floor, Boston, MA  02110-1301 USA
+ *
+ * Authors:
+ *   Florian octo Forster <ff at octo.it>
+ **/
+
+#ifndef _ISOC99_SOURCE
+# define _ISOC99_SOURCE
+#endif
+#ifndef _POSIX_C_SOURCE
+# define _POSIX_C_SOURCE 200112L
+#endif
+
 #include <stdlib.h>
 #include <string.h>
 
@@ -33,6 +61,12 @@ void sn_comparator_invert (sn_comparator_t *c)
   c->max = max;
 } /* void sn_comparator_invert */
 
+void sn_comparator_shift (sn_comparator_t *c, int sw, int inputs_num)
+{
+  c->min = (c->min + sw) % inputs_num;
+  c->max = (c->max + sw) % inputs_num;
+} /* void sn_comparator_shift */
+
 void sn_comparator_swap (sn_comparator_t *c, int con0, int con1)
 {
   if (c->min == con0)
@@ -54,11 +88,9 @@ void sn_comparator_swap (sn_comparator_t *c, int con0, int con1)
   }
 } /* void sn_comparator_swap */
 
-int sn_comparator_compare (const void *v0, const void *v1)
+int sn_comparator_compare (const sn_comparator_t *c0,
+    const sn_comparator_t *c1)
 {
-  sn_comparator_t *c0 = (sn_comparator_t *) v0;
-  sn_comparator_t *c1 = (sn_comparator_t *) v1;
-
   if (SN_COMP_LEFT (c0) < SN_COMP_LEFT (c1))
     return (-1);
   else if (SN_COMP_LEFT (c0) > SN_COMP_LEFT (c1))