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 |
|
20 |
#define _FILE_OFFSET_BITS 64
|
21 |
#define _LARGEFILE_SOURCE
|
22 |
#define _LARGEFILE64_SOURCE
|
23 |
#include <stdlib.h>
|
24 |
#include "maptool.h"
|
25 |
#include "debug.h"
|
26 |
|
27 |
void
|
28 |
save_buffer(char *filename, struct buffer *b, long long offset)
|
29 |
{
|
30 |
FILE *f;
|
31 |
f=fopen(filename,"rb+");
|
32 |
if (! f)
|
33 |
f=fopen(filename,"wb+");
|
34 |
|
35 |
dbg_assert(f != NULL);
|
36 |
|
37 |
off_t offset_64=(off_t) offset;
|
38 |
|
39 |
fprintf(stderr,"save_buffer:seeking bytes in %s to "LONGLONG_FMT"\n", filename, offset_64);
|
40 |
|
41 |
int ret;
|
42 |
// ret=fseek(f, offset, SEEK_SET);
|
43 |
ret=fseeko(f, offset_64, SEEK_SET);
|
44 |
//fprintf(stderr,"ret.code of seek=%d\n", ret);
|
45 |
size_t ret2;
|
46 |
ret2=fwrite(b->base, b->size, 1, f);
|
47 |
//fprintf(stderr,"ret.code of fwrite=%d\n", ret2);
|
48 |
fclose(f);
|
49 |
}
|
50 |
|
51 |
void
|
52 |
load_buffer(char *filename, struct buffer *b, long long offset, long long size)
|
53 |
{
|
54 |
FILE *f;
|
55 |
long long len;
|
56 |
int ret;
|
57 |
|
58 |
fprintf(stderr,"load_buffer:offset="LONGLONG_FMT" size="LONGLONG_FMT"\n", offset, size);
|
59 |
|
60 |
// fprintf(stderr,"load_buffer 1 buffer ptr=%d\n", b->base);
|
61 |
|
62 |
int reuse_buffer=0;
|
63 |
|
64 |
fprintf(stderr,"load_buffer:info has b->malloced=%d\n", b->malloced);
|
65 |
fprintf(stderr,"load_buffer:info has b->size="LONGLONG_FMT"\n", (size_t)b->size);
|
66 |
fprintf(stderr,"load_buffer:info want size="LONGLONG_FMT"\n", size);
|
67 |
if (b->base)
|
68 |
{
|
69 |
if (size > b->size)
|
70 |
{
|
71 |
fprintf(stderr,"load_buffer:# freeing buffer #\n");
|
72 |
free(b->base);
|
73 |
//fprintf(stderr,"load_buffer 2 buffer ptr=%d\n", b->base);
|
74 |
b->base=NULL;
|
75 |
}
|
76 |
else
|
77 |
{
|
78 |
fprintf(stderr,"load_buffer:@ re-using buffer @\n");
|
79 |
reuse_buffer=1;
|
80 |
}
|
81 |
}
|
82 |
else
|
83 |
{
|
84 |
//fprintf(stderr,"* no buffer to free *\n");
|
85 |
}
|
86 |
//fprintf(stderr,"load_buffer 3 buffer ptr=%d\n", b->base);
|
87 |
|
88 |
if (! reuse_buffer)
|
89 |
{
|
90 |
b->malloced=0;
|
91 |
}
|
92 |
|
93 |
f=fopen(filename,"rb");
|
94 |
fseek(f, 0, SEEK_END);
|
95 |
// len=ftell(f);
|
96 |
len=ftello(f); // 64bit
|
97 |
//fprintf(stderr,"load_buffer ftell="LONGLONG_FMT"\n", len);
|
98 |
if (offset+size > len) {
|
99 |
size=len-offset;
|
100 |
//fprintf(stderr,"load_buffer new size="LONGLONG_FMT"\n", size);
|
101 |
ret=1;
|
102 |
}
|
103 |
|
104 |
b->size=size;
|
105 |
b->malloced=size;
|
106 |
|
107 |
|
108 |
off_t offset_64=(off_t) offset;
|
109 |
fprintf(stderr,"load_buffer:reading "LONGLONG_FMT" bytes from %s at "LONGLONG_FMT"\n", b->size, filename, offset_64);
|
110 |
|
111 |
int ret3;
|
112 |
// ret3=fseek(f, offset, SEEK_SET);
|
113 |
ret3=fseeko(f, offset_64, SEEK_SET); // 64bit
|
114 |
//fprintf(stderr,"ret.code of seek=%d\n", ret3);
|
115 |
|
116 |
if (! reuse_buffer)
|
117 |
{
|
118 |
b->base=malloc((size_t)size);
|
119 |
fprintf(stderr,"load_buffer:ret.code of malloc=%d\n", b->base);
|
120 |
}
|
121 |
|
122 |
dbg_assert(b->base != NULL);
|
123 |
fread(b->base, b->size, 1, f);
|
124 |
fclose(f);
|
125 |
}
|