simple.c

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/*************************************************************************
 * Copyright (c) 2011 AT&T Intellectual Property
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors: Details at https://graphviz.org
 *************************************************************************/
 
#include <graphviz/gvc.h>
#include <stddef.h>
#include <stdio.h>
 
int main(int argc, char **argv) {
 
  GVC_t *gvc = gvContext();
 
  FILE *fp;
  if (argc > 1)
    fp = fopen(argv[1], "r");
  else
    fp = stdin;
  graph_t *g = agread(fp, NULL);
 
  gvLayout(gvc, g, "dot");
 
  gvRender(gvc, g, "plain", stdout);
 
  gvFreeLayout(gvc, g);
 
  agclose(g);
 
  return gvFreeContext(gvc);
}