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/**
* @file
* @brief adjust directed graphs to improve layout aspect ratio
*/
/*************************************************************************
* 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
* Updated by Emden Gansner
*/
#include "config.h"
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <cgraph/cgraph.h>
#include <cgraph/ingraphs.h>
#include <getopt.h>
#include "openFile.h"
#include <util/exit.h>
#include <util/unreachable.h>
typedef graphviz_unflatten_options_t opts_t;
static FILE *outFile;
static char *cmd;
static char *useString =
"Usage: %s [-f?] [-l <M>] [-c <N>] [-o <outfile>] <files>\n\
-o <outfile> - put output in <outfile>\n\
-f - adjust immediate fanout chains\n\
-l <M> - stagger length of leaf edges between [1,<M>]\n\
-c <N> - put disconnected nodes in chains of length <N>\n\
-? - print usage\n";
static void usage(int v)
{
fprintf(stderr, useString, cmd);
graphviz_exit(v);
}
static char **scanargs(opts_t *opts, int argc, char **argv) {
int c, ival;
cmd = argv[0];
opterr = 0;
while ((c = getopt(argc, argv, ":fl:c:o:")) != -1) {
switch (c) {
case 'f':
opts->Do_fans = true;
break;
case 'l':
ival = atoi(optarg);
if (ival > 0)
opts->MaxMinlen = ival;
break;
case 'c':
ival = atoi(optarg);
if (ival > 0)
opts->ChainLimit = ival;
break;
case 'o':
if (outFile != NULL)
fclose(outFile);
outFile = openFile(cmd, optarg, "w");
break;
case '?':
if (optopt == '?')
usage(0);
else {
fprintf(stderr, "%s: option -%c unrecognized\n", cmd,
optopt);
usage(-1);
}
break;
case ':':
fprintf(stderr, "%s: missing argument for option -%c\n",
cmd, optopt);
usage(-1);
break;
default:
UNREACHABLE();
}
}
if (opts->Do_fans && opts->MaxMinlen < 1)
fprintf(stderr, "%s: Warning: -f requires -l flag\n", cmd);
argv += optind;
argc -= optind;
if (!outFile)
outFile = stdout;
if (argc)
return argv;
else
return 0;
}
int main(int argc, char **argv)
{
Agraph_t *g;
ingraph_state ig;
char **files;
opts_t opts = {0};
files = scanargs(&opts, argc, argv);
newIngraph(&ig, files);
while ((g = nextGraph(&ig))) {
graphviz_unflatten(g, &opts);
agwrite(g, outFile);
}
graphviz_exit(0);
}
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