X-Git-Url: http://git.ozlabs.org/?a=blobdiff_plain;f=ccan%2Fagar%2Ftest%2Fnegacycle.c;fp=ccan%2Fagar%2Ftest%2Fnegacycle.c;h=7d3daa963bcb6a16c9a0fc6af2cf983fa6ead085;hb=318edb2466a24a2eadcfd05fa83ae29c0e8aae03;hp=0000000000000000000000000000000000000000;hpb=eedf1079f38efb2b8dc4fd3f516cce8ac1272c06;p=ccan

diff --git a/ccan/agar/test/negacycle.c b/ccan/agar/test/negacycle.c
new file mode 100644
index 00000000..7d3daa96
--- /dev/null
+++ b/ccan/agar/test/negacycle.c
@@ -0,0 +1,42 @@
+#include "config.h"
+
+#include <assert.h>
+
+#include <ccan/container_of/container_of.h>
+#include <ccan/ptrint/ptrint.h>
+
+#include <ccan/agar/agar.h>
+
+#include "simple-graphr.h"
+
+static const void *negacycle_first_edge_r(const struct agar_graph *gr,
+					  const void *nr)
+{
+	return int2ptr(1);
+}
+
+static const void *negacycle_next_edge_r(const struct agar_graph *gr,
+					 const void *nr, const void *e)
+{
+	assert(ptr2int(e) == 1);
+	return NULL;
+}
+
+static int negacycle_edge_info_r(const struct agar_graph *gr,
+				 const void *nr, const void *e,
+				 struct agar_edge_info *eir)
+{
+	int ni = ptr2int(nr);
+
+	assert(ptr2int(e) == 1);
+	eir->to = int2ptr((ni % 3) + 1);
+	if (ni == 3)
+		eir->icost = -3;
+	return 0;
+}
+
+struct negacycle_graphr negacycle_graphr = {
+	AGAR_INIT_GRAPH(negacycle_first_edge_r,
+			negacycle_next_edge_r,
+			negacycle_edge_info_r),
+};