git.ozlabs.org Git - ccan/blob - ccan/aga/test/error-graph.c

   1 #include "config.h"
   2
   3 #include <assert.h>
   4
   5 #include <ccan/aga/aga.h>
   6 #include <ccan/container_of/container_of.h>
   7 #include <ccan/ptrint/ptrint.h>
   8
   9 #include "simple-graph.h"
  10
  11 static ptrint_t *error_first_edge(const struct aga_graph *g,
  12                                   const struct aga_node *n)
  13 {
  14         return int2ptr(1);
  15 }
  16
  17 static ptrint_t *error_next_edge(const struct aga_graph *g,
  18                                  const struct aga_node *n,
  19                                  ptrint_t *edge)
  20 {
  21         assert(edge == int2ptr(1));
  22
  23         return NULL;
  24 }
  25
  26 static int error_edge_info(const struct aga_graph *g, const struct aga_node *n,
  27                            ptrint_t *edge, struct aga_edge_info *ei)
  28 {
  29         struct error_graph *eg = container_of(g, struct error_graph, sg.g);
  30         int fromindex = n - eg->sg.nodes;
  31
  32         switch (fromindex) {
  33         case 1:
  34                 ei->to = &eg->sg.nodes[2];
  35                 break;
  36
  37         case 2:
  38                 ei->to = NULL;
  39                 break;
  40
  41         case 3:
  42                 ei->to = &eg->sg.nodes[4];
  43                 break;
  44
  45         default:
  46                 return -1;
  47         }
  48
  49         return 0;
  50 }
  51
  52 void error_graph_init(struct error_graph *eg)
  53 {
  54         simple_graph_init(&eg->sg, error_first_edge, error_next_edge,
  55                           error_edge_info);
  56 }