aga: Simple test graphs

[ccan] / ccan / aga / test / error-graph.c

diff --git a/ccan/aga/test/error-graph.c b/ccan/aga/test/error-graph.c
new file mode 100644 (file)
index 0000000..a52544b
--- /dev/null
+++ b/ccan/aga/test/error-graph.c
@@ -0,0 +1,56 @@
+#include "config.h"
+
+#include <assert.h>
+
+#include <ccan/aga/aga.h>
+#include <ccan/container_of/container_of.h>
+#include <ccan/ptrint/ptrint.h>
+
+#include "simple-graph.h"
+
+static ptrint_t *error_first_edge(const struct aga_graph *g,
+                                 const struct aga_node *n)
+{
+       return int2ptr(1);
+}
+
+static ptrint_t *error_next_edge(const struct aga_graph *g,
+                                const struct aga_node *n,
+                                ptrint_t *edge)
+{
+       assert(edge == int2ptr(1));
+
+       return NULL;
+}
+
+static int error_edge_info(const struct aga_graph *g, const struct aga_node *n,
+                          ptrint_t *edge, struct aga_edge_info *ei)
+{
+       struct error_graph *eg = container_of(g, struct error_graph, sg.g);
+       int fromindex = n - eg->sg.nodes;
+
+       switch (fromindex) {
+       case 1:
+               ei->to = &eg->sg.nodes[2];
+               break;
+
+       case 2:
+               ei->to = NULL;
+               break;
+
+       case 3:
+               ei->to = &eg->sg.nodes[4];
+               break;
+
+       default:
+               return -1;
+       }
+
+       return 0;
+}
+
+void error_graph_init(struct error_graph *eg)
+{
+       simple_graph_init(&eg->sg, error_first_edge, error_next_edge,
+                         error_edge_info);
+}