dot.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
 *************************************************************************/
 
/*
 * Written by Stephen North and Eleftherios Koutsofios.
 */
 
#include "config.h"
 
#include <cgraph/cgraph.h>
#include <cgraph/exit.h>
#include <gvc/gvc.h>
#include <gvc/gvio.h>
 
#include <common/globals.h>
 
#include <stdbool.h>
#include <stdlib.h>
#include <time.h>
 
static GVC_t *Gvc;
static graph_t * G;
 
#ifndef _WIN32
#ifndef NO_FPERR
static void fperr(int s)
{
    fprintf(stderr, "caught SIGFPE %d\n", s);
    /* signal (s, SIG_DFL); raise (s); */
    graphviz_exit(1);
}
#endif
#endif
 
int main(int argc, char **argv)
{
    graph_t *prev = NULL;
    int r, rc = 0;
 
    Gvc = gvContextPlugins(lt_preloaded_symbols, DEMAND_LOADING);
    GvExitOnUsage = 1;
    gvParseArgs(Gvc, argc, argv);
#ifndef _WIN32
    signal(SIGUSR1, gvToggle);
#ifndef NO_FPERR
    signal(SIGFPE, fperr);
#endif
#endif
 
    if ((G = gvPluginsGraph(Gvc))) {
            gvLayoutJobs(Gvc, G);  /* take layout engine from command line */
            gvRenderJobs(Gvc, G);
    }
    else {
        while ((G = gvNextInputGraph(Gvc))) {
            if (prev) {
                gvFreeLayout(Gvc, prev);
                agclose(prev);
            }
            gvLayoutJobs(Gvc, G);  /* take layout engine from command line */
            gvRenderJobs(Gvc, G);
            r = agreseterrors();
            rc = MAX(rc,r);
            prev = G;
        }
    }
    gvFinalize(Gvc);
    r = gvFreeContext(Gvc);
    graphviz_exit(MAX(rc,r));
}