test/test_metatile.c

   1 /* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
   2 /*
   3  * viking -- GPS Data and Topo Analyzer, Explorer, and Manager
   4  *
   5  * Copyright (C) 2014, Rob Norris <rw_norris@hotmail.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  *
  21  */
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <unistd.h>
  25 #include <limits.h>
  26 #include <string.h>
  27 #include <sys/types.h>
  28 #include <sys/stat.h>
  29 #include <errno.h>
  30 #include <fcntl.h>
  31
  32 #include <metatile.h>
  33
  34 int main ( int argc, char *argv[] )
  35 {
  36     const int tile_max = METATILE_MAX_SIZE;
  37     char err_msg[PATH_MAX];
  38     char *buf;
  39     int len;
  40     int compressed;
  41
  42     // Could extend to get values from the command-line.
  43     int x = 4051;
  44     int y = 2753;
  45     int z = 13;
  46     //char dir[] = "/var/lib/mod_tile/default";
  47     char dir[] = "metatile_example";
  48     // Example defaults to a metatile that was pre generated using mod_tile
  49     // Equates to 'metatile_example/13/0/0/250/220/0.meta'
  50     //  which is Brownsea Island, Dorset, UK (50.69N, 1.96W)
  51
  52     buf = malloc(tile_max);
  53     if (!buf) {
  54         return 1;
  55     }
  56
  57     err_msg[0] = 0;
  58
  59     if ( argc > 1 )
  60       len = metatile_read(argv[1], x, y, z, buf, tile_max, &compressed, err_msg);
  61     else
  62       len = metatile_read(dir, x, y, z, buf, tile_max, &compressed, err_msg);
  63
  64     if (len > 0) {
  65         // Do something with buf
  66         // Just dump to a file
  67         FILE *fp;
  68         if (compressed)
  69           fp = fopen( "tilefrommeta.gz" , "w" );
  70         else
  71           fp = fopen( "tilefrommeta.png" , "w" );
  72
  73         if ( fp ) {
  74           fwrite(buf, 1 , len, fp);
  75           fclose(fp);
  76         }
  77         else
  78           fprintf(stderr, "Failed to open file because: %s\n", strerror(errno));
  79
  80         free(buf);
  81         return 0;
  82     }
  83     else
  84         fprintf(stderr, "FAILED: %s\n", err_msg);
  85
  86     free(buf);
  87     return 3;
  88 }