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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;
#define MY_MAX_COMPONENTS 1024
dglGraph_s agraphComponents[MY_MAX_COMPONENTS];
int nret, fd, i, cComponents;
char szGraphOutFilename[1024];
/* program options
*/
char *pszGraph;
char *pszGraphOut;
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_END
if (GNO_PARSE(argc, argv) < 0) {
return 1;
}
/*
* options parsed
*/
if (pszGraph == NULL || pszGraphOut == NULL) {
GNO_HELP("components usage");
return 1;
}
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 depth components spanning:\n");
cComponents = dglDepthComponents(&graph, agraphComponents,
MY_MAX_COMPONENTS, _clipper, NULL);
if (cComponents < 0) {
fprintf(stderr, "dglDepthSpanning error: %s\n", dglStrerror(&graph));
return 1;
}
printf("Done.\n");
printf("Connected Component(s) Found: %d\n", cComponents);
for (i = 0; i < cComponents; i++) {
printf("Component %d of %d: ", i + 1, cComponents);
fflush(stdout);
printf("[flatten...");
fflush(stdout);
nret = dglFlatten(&agraphComponents[i]);
printf("done] ");
fflush(stdout);
if (dglGet_EdgeCount(&agraphComponents[i]) > 0) {
if (pszGraphOut) {
snprintf(szGraphOutFilename, sizeof(szGraphOutFilename),
"%s-component-%d", pszGraphOut, i);
printf("[write <%s>...", szGraphOutFilename);
fflush(stdout);
if ((fd = open(szGraphOutFilename, O_WRONLY | O_CREAT | O_TRUNC,
0666)) < 0) {
perror("open");
return 1;
}
dglWrite(&agraphComponents[i], fd);
if (nret < 0) {
fprintf(stderr, "dglWrite error: %s\n",
dglStrerror(&graph));
return 1;
}
close(fd);
printf("done] ");
fflush(stdout);
}
}
else {
printf("component is empty. No output produced.\n");
}
printf("[release...");
dglRelease(&agraphComponents[i]);
printf("done]\n");
}
dglRelease(&graph);
return 0;
}
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