1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
/*
* Copyright (c) 2017 rxi
* Copyright (c) 2021 Aidan MacDonald
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include "microtar-stdio.h"
#include <stdio.h>
#include <string.h>
static int file_read(void* stream, void* data, unsigned size)
{
unsigned res = fread(data, 1, size, (FILE*)stream);
return (res == size) ? MTAR_ESUCCESS : MTAR_EREADFAIL;
}
static int file_write(void* stream, const void* data, unsigned size)
{
unsigned res = fwrite(data, 1, size, (FILE*)stream);
return (res == size) ? MTAR_ESUCCESS : MTAR_EWRITEFAIL;
}
static int file_seek(void* stream, unsigned offset)
{
int res = fseek((FILE*)stream, offset, SEEK_SET);
return (res == 0) ? MTAR_ESUCCESS : MTAR_ESEEKFAIL;
}
static int file_close(void* stream)
{
int err = fclose((FILE*)stream);
return (err == 0 ? MTAR_ESUCCESS : MTAR_EFAILURE);
}
static const mtar_ops_t file_ops = {
.read = file_read,
.write = file_write,
.seek = file_seek,
.close = file_close,
};
int mtar_open(mtar_t* tar, const char* filename, const char* mode)
{
/* Determine access mode */
int access;
char* read = strchr(mode, 'r');
char* write = strchr(mode, 'w');
if(read) {
if(write)
return MTAR_EAPI;
access = MTAR_READ;
} else if(write) {
access = MTAR_WRITE;
} else {
return MTAR_EAPI;
}
/* Open file */
FILE* file = fopen(filename, mode);
if(!file)
return MTAR_EOPENFAIL;
mtar_init(tar, access, &file_ops, file);
return MTAR_ESUCCESS;
}
|
