/[zanavi_public1]/navit/navit/maptool/buffer.c
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Contents of /navit/navit/maptool/buffer.c

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Revision 8 - (show annotations) (download)
Fri Oct 28 21:39:42 2011 UTC (9 years, 4 months ago) by zoff99
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import
1 /**
2 * Navit, a modular navigation system.
3 * Copyright (C) 2005-2011 Navit Team
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * version 2 as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the
16 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 */
19 #include <stdlib.h>
20 #include "maptool.h"
21 #include "debug.h"
22
23 void
24 save_buffer(char *filename, struct buffer *b, long long offset)
25 {
26 FILE *f;
27 f=fopen(filename,"rb+");
28 if (! f)
29 f=fopen(filename,"wb+");
30
31 dbg_assert(f != NULL);
32 fseek(f, offset, SEEK_SET);
33 fwrite(b->base, b->size, 1, f);
34 fclose(f);
35 }
36
37 void
38 load_buffer(char *filename, struct buffer *b, long long offset, long long size)
39 {
40 FILE *f;
41 long long len;
42 int ret;
43 if (b->base)
44 free(b->base);
45 b->malloced=0;
46 f=fopen(filename,"rb");
47 fseek(f, 0, SEEK_END);
48 len=ftell(f);
49 if (offset+size > len) {
50 size=len-offset;
51 ret=1;
52 }
53 b->size=b->malloced=size;
54 fprintf(stderr,"reading "LONGLONG_FMT" bytes from %s at "LONGLONG_FMT"\n", b->size, filename, offset);
55 fseek(f, offset, SEEK_SET);
56 b->base=malloc(b->size);
57 dbg_assert(b->base != NULL);
58 fread(b->base, b->size, 1, f);
59 fclose(f);
60 }

   
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