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/* LIBDGL -- a Directed Graph Library implementation
* Copyright (C) 2002 Roberto Micarelli
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* Source best viewed with tabstop=4
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <time.h>
#include <errno.h>
#include <math.h>
#include "../type.h"
#include "../graph.h"
#include "opt.h"
static int _clipper(dglGraph_s * pgraphIn,
dglGraph_s * pgraphOut,
dglSpanClipInput_s * pArgIn,
dglSpanClipOutput_s * pArgOut, void *pvArg)
{
return 0;
}
int main(int argc, char **argv)
{
dglGraph_s graph, graphOut;
dglInt32_t nVertex;
int nret, fd;
/* program options
*/
char *pszGraph;
char *pszGraphOut;
char *pszVertex;
GNO_BEGIN /* short long default variable help */
GNO_OPTION("g", "graph", NULL, &pszGraph, "Input Graph file")
GNO_OPTION("o", "graphout", NULL, &pszGraphOut, "Output Graph file")
GNO_OPTION("v", "vertex", NULL, &pszVertex, "Vertex Node Id")
GNO_END if (GNO_PARSE(argc, argv) < 0)
{
return 1;
}
/*
* options parsed
*/
if (pszVertex == NULL) {
GNO_HELP("minspan usage");
return 1;
}
nVertex = atol(pszVertex);
printf("Graph read:\n");
if ((fd = open(pszGraph, O_RDONLY)) < 0) {
perror("open");
return 1;
}
nret = dglRead(&graph, fd);
if (nret < 0) {
fprintf(stderr, "dglRead error: %s\n", dglStrerror(&graph));
return 1;
}
close(fd);
printf("Done.\n");
printf("Graph minimum spanning:\n");
nret = dglMinimumSpanning(&graph, &graphOut, nVertex, _clipper, NULL);
if (nret < 0) {
fprintf(stderr, "dglMinimumSpanning error: %s\n",
dglStrerror(&graph));
return 1;
}
printf("Done.\n");
printf("Graph flatten:\n");
nret = dglFlatten(&graphOut);
printf("Done.\n");
if (dglGet_EdgeCount(&graphOut) > 0) {
if (pszGraphOut) {
printf("Graph write:\n");
if ((fd =
open(pszGraphOut, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0) {
perror("open");
return 1;
}
dglWrite(&graphOut, fd);
if (nret < 0) {
fprintf(stderr, "dglWrite error: %s\n",
dglStrerror(&graphOut));
return 1;
}
close(fd);
printf("Done.\n");
}
}
else {
printf("Empty span. No output produced.\n");
}
dglRelease(&graph);
dglRelease(&graphOut);
return 0;
}
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