navit/maptool/buffer.c

/**
 * Navit, a modular navigation system.
 * Copyright (C) 2005-2011 Navit Team
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * 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.
 */
#include <stdlib.h>
#include "maptool.h"
#include "debug.h"

void
save_buffer(char *filename, struct buffer *b, long long offset)
{
        FILE *f;
        f=fopen(filename,"rb+");
        if (! f)
                f=fopen(filename,"wb+");
                
        dbg_assert(f != NULL);
        fseek(f, offset, SEEK_SET);
        fwrite(b->base, b->size, 1, f);
        fclose(f);
}

void
load_buffer(char *filename, struct buffer *b, long long offset, long long size)
{
        FILE *f;
        long long len;
        int ret;
        if (b->base)
                free(b->base);
        b->malloced=0;
        f=fopen(filename,"rb");
        fseek(f, 0, SEEK_END);
        len=ftell(f);
        if (offset+size > len) {
                size=len-offset;
                ret=1;
        }
        b->size=b->malloced=size;
        fprintf(stderr,"reading "LONGLONG_FMT" bytes from %s at "LONGLONG_FMT"\n", b->size, filename, offset);
        fseek(f, offset, SEEK_SET);
        b->base=malloc(b->size);
        dbg_assert(b->base != NULL);
        fread(b->base, b->size, 1, f);
        fclose(f);
}
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	}