cflow の出力を Graphviz で可視化

programming

cflow の出力を graphviz で可視化するためのスクリプトを作ってみた．

#!/usr/bin/awk -f

function parse(parent, nest)
{
  if (getline == 0)
    return -1;
  
  N=2;
  while ($N == "")
    N++;
  
  while (N>nest) {
    FUNC=gensub(/^(.+) {(.*)}$/, "\\1", "g", $N);
    print parent " -> " FUNC;
    N = parse(FUNC, nest+1);
  }
  return N;
}

BEGIN{
  FS="\t";

  print "digraph G {";
  print "node [shape=box]";
  while (0 < parse("global", 1))
    ;
  print "}";
}

実行

$ cflow a.c |./cflow2dot.awk | dot -Tpng | display