delnode.c

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00001 /* LIBDGL -- a Directed Graph Library implementation
00002  * Copyright (C) 2002 Roberto Micarelli
00003  *
00004  * This program is free software; you can redistribute it and/or modify
00005  * it under the terms of the GNU General Public License as published by
00006  * the Free Software Foundation; either version 2 of the License, or
00007  * (at your option) any later version.
00008  *
00009  * This program is distributed in the hope that it will be useful,
00010  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012  * GNU General Public License for more details.
00013  *
00014  * You should have received a copy of the GNU General Public License
00015  * along with this program; if not, write to the Free Software
00016  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
00017  */
00018 
00019 /*
00020  * Source best viewed with tabstop=4
00021  */
00022 
00023 #include <stdio.h>
00024 #include <sys/types.h>
00025 #include <sys/stat.h>
00026 #include <unistd.h>
00027 #include <stdlib.h>
00028 #include <fcntl.h>
00029 #include <time.h>
00030 #include <errno.h>
00031 #include <math.h>
00032 
00033 #include "../type.h"
00034 #include "../graph.h"
00035 
00036 #include "opt.h"
00037 
00038 int main(int argc, char **argv)
00039 {
00040     dglGraph_s graph;
00041     dglInt32_t nNode;
00042     int nret, fd;
00043 
00044     /* program options
00045      */
00046     char *pszGraph;
00047     char *pszGraphOut;
00048     char *pszNode;
00049 
00050     GNO_BEGIN                   /* short   long                default     variable        help */
00051         GNO_OPTION("g", "graph", NULL, &pszGraph, "Input Graph file")
00052         GNO_OPTION("o", "graphout", NULL, &pszGraphOut, "Output Graph file")
00053         GNO_OPTION("n", "node", NULL, &pszNode, "Node Id to cancel")
00054     GNO_END if (GNO_PARSE(argc, argv) < 0)
00055     {
00056         return 1;
00057     }
00058     /*
00059      * options parsed
00060      */
00061 
00062     if (pszNode == NULL) {
00063         GNO_HELP("delnode usage");
00064         return 1;
00065     }
00066     nNode = atol(pszNode);
00067 
00068     printf("Graph read:\n");
00069     if ((fd = open(pszGraph, O_RDONLY)) < 0) {
00070         perror("open");
00071         return 1;
00072     }
00073     nret = dglRead(&graph, fd);
00074     if (nret < 0) {
00075         fprintf(stderr, "dglRead error: %s\n", dglStrerror(&graph));
00076         return 1;
00077     }
00078     close(fd);
00079     printf("Done.\n");
00080 
00081     printf("Graph unflatten:\n");
00082     nret = dglUnflatten(&graph);
00083     if (nret < 0) {
00084         fprintf(stderr, "dglUnflatten error: %s\n", dglStrerror(&graph));
00085         return 1;
00086     }
00087     printf("Done.\n");
00088 
00089     nret = dglDelNode(&graph, nNode);
00090     if (nret < 0) {
00091         fprintf(stderr, "dglDelNode error: %s\n", dglStrerror(&graph));
00092         return 1;
00093     }
00094 
00095     printf("Graph flatten:\n");
00096     nret = dglFlatten(&graph);
00097     printf("Done.\n");
00098 
00099     if (pszGraphOut) {
00100         printf("Graph write: %s\n", pszGraphOut);
00101         if ((fd = open(pszGraphOut, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0) {
00102             perror("open");
00103             return 1;
00104         }
00105         nret = dglWrite(&graph, fd);
00106         if (nret < 0) {
00107             fprintf(stderr, "dglWrite error: %s\n", dglStrerror(&graph));
00108             return 1;
00109         }
00110         close(fd);
00111         printf("Done.\n");
00112     }
00113 
00114     dglRelease(&graph);
00115     return 0;
00116 }

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