git.ozlabs.org Git - ccan/blob - ccan/agar/test/chain.c

   1 #include "config.h"
   2
   3 #include <stdlib.h>
   4
   5 #include <ccan/container_of/container_of.h>
   6 #include <ccan/ptrint/ptrint.h>
   7
   8 #include <ccan/agar/agar.h>
   9
  10 #include "simple-graphr.h"
  11
  12 static int chain_edge_info_r(const struct agar_graph *gr,
  13                              const void *nr, const void *e,
  14                              struct agar_edge_info *eir)
  15 {
  16         int fromi = ptr2int(nr);
  17         int toi = ptr2int(e);
  18
  19         if ((toi == fromi + 1) || (fromi == toi + 1))
  20                 eir->to = int2ptr(toi);
  21
  22         return 0;
  23 }
  24
  25 void chain_graphr_init(struct chain_graphr *cgr, int nnodes)
  26 {
  27         cgr->fgr.nnodes = nnodes;
  28         agar_init_graph(&cgr->fgr.gr, full_first_edge_r, full_next_edge_r,
  29                         chain_edge_info_r);
  30 }