src/sn_{network,stage}.[ch]: Implement sn_{network,stage}_compare.

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

diff --git a/src/sn_stage.c b/src/sn_stage.c
index dc00b44..1584469 100644 (file)
--- a/src/sn_stage.c
+++ b/src/sn_stage.c
@@ -626,20 +626,47 @@ sn_stage_t *sn_stage_unserialize (char **ret_buffer, size_t *ret_buffer_size)
   return (s);
 } /* sn_stage_t *sn_stage_unserialize */
 
-uint32_t sn_stage_get_hashval (const sn_stage_t *s) /* {{{ */
+int sn_stage_compare (const sn_stage_t *s0, const sn_stage_t *s1) /* {{{ */
 {
-  uint32_t hash;
+  int status;
+  int i;
+
+  if (s0 == s1)
+    return (0);
+  else if (s0 == NULL)
+    return (-1);
+  else if (s1 == NULL)
+    return (1);
+
+  if (s0->comparators_num < s1->comparators_num)
+    return (-1);
+  else if (s0->comparators_num > s1->comparators_num)
+    return (1);
+
+  for (i = 0; i < s0->comparators_num; i++)
+  {
+    status = sn_comparator_compare (s0->comparators + i, s1->comparators + i);
+    if (status != 0)
+      return (status);
+  }
+
+  return (0);
+} /* }}} int sn_stage_compare */
+
+uint64_t sn_stage_get_hashval (const sn_stage_t *s) /* {{{ */
+{
+  uint64_t hash;
   int i;
 
   if (s == NULL)
     return (0);
 
-  hash = (uint32_t) s->depth;
+  hash = (uint64_t) s->depth;
 
   for (i = 0; i < s->comparators_num; i++)
     hash = (hash * 99991) + sn_comparator_get_hashval (s->comparators + i);
 
   return (hash);
-} /* }}} uint32_t sn_stage_get_hashval */
+} /* }}} uint64_t sn_stage_get_hashval */
 
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