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/**
* 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 "navit_lfs.h"
#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);
fseeko(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;
dbg_assert(size>=0);
dbg_assert(offset>=0);
if (b->base)
free(b->base);
b->malloced=0;
f=fopen(filename,"rb");
fseeko(f, 0, SEEK_END);
len=ftello(f);
dbg_assert(len>=0);
if (offset+size > len) {
size=len-offset;
}
b->size=b->malloced=size;
dbg_assert(b->size>0);
#if 0
fprintf(stderr,"reading "LONGLONG_FMT" bytes from %s of "LONGLONG_FMT" bytes at "LONGLONG_FMT"\n", b->size, filename, len, offset);
#endif
fseeko(f, offset, SEEK_SET);
b->base=malloc(b->size);
dbg_assert(b->base != NULL);
fread(b->base, b->size, 1, f);
fclose(f);
}
long long
sizeof_buffer(char *filename)
{
long long ret;
FILE *f=fopen(filename,"rb");
fseeko(f, 0, SEEK_END);
ret=ftello(f);
fclose(f);
return ret;
}
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