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
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
/*
* libmm-fileinfo
*
* Copyright (c) 2000 - 2011 Samsung Electronics Co., Ltd. All rights reserved.
*
* Contact: Haejeong Kim <backto.kim@samsung.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "mm_debug.h"
#include "mm_file_utils.h"
typedef struct mmfileiodata
{
int fd;
long long offset;
} tMMFORMAT_FILEIO_DATA;
static int file_open(MMFileIOHandle *handle, const char *filename, int flags)
{
tMMFORMAT_FILEIO_DATA *privateData = NULL;
int access = 0;
int fd = 0;
if (!handle || !filename)
{
debug_error ("invalid param\n");
return MMFILE_IO_FAILED;
}
filename += strlen(handle->iofunc->handleName) + 3; /* :// */
if (flags & MMFILE_RDWR)
{
access = O_CREAT | O_TRUNC | O_RDWR;
}
else if (flags & MMFILE_WRONLY)
{
access = O_CREAT | O_TRUNC | O_WRONLY;
}
else
{
access = O_RDONLY;
}
#ifdef O_BINARY
access |= O_BINARY;
#endif
fd = open(filename, access, 0666);
if (fd < 0)
{
debug_error ("open error\n");
return MMFILE_IO_FAILED;
}
privateData = mmfile_malloc (sizeof(tMMFORMAT_FILEIO_DATA));
if (!privateData)
{
debug_error ("calloc privateData\n");
return MMFILE_IO_FAILED;
}
privateData->fd = fd;
privateData->offset = 0;
handle->privateData = (void *)privateData;
return MMFILE_IO_SUCCESS;
}
static int file_read(MMFileIOHandle *handle, unsigned char *buf, int size)
{
tMMFORMAT_FILEIO_DATA *privateData = handle->privateData;
int readSize = 0;
readSize = read(privateData->fd, buf, size);
if (readSize < 0)
{
debug_error ("read\n");
return MMFILE_IO_FAILED;
}
privateData->offset += readSize;
return readSize;
}
static int file_write(MMFileIOHandle *handle, unsigned char *buf, int size)
{
tMMFORMAT_FILEIO_DATA *privateData = handle->privateData;
int writtenSize = 0;
writtenSize = write(privateData->fd, buf, size);
if (writtenSize < 0)
{
debug_error ("write\n");
return MMFILE_IO_FAILED;
}
privateData->offset += writtenSize;
return writtenSize;
}
static long long file_seek(MMFileIOHandle *handle, long long pos, int whence)
{
tMMFORMAT_FILEIO_DATA *privateData = handle->privateData;
privateData->offset = lseek(privateData->fd, pos, whence);
return privateData->offset;
}
static long long file_tell(MMFileIOHandle *handle)
{
tMMFORMAT_FILEIO_DATA *privateData = handle->privateData;
return privateData->offset;
}
static int file_close(MMFileIOHandle *handle)
{
tMMFORMAT_FILEIO_DATA *privateData = handle->privateData;
int ret = 0;
if (privateData)
{
ret = close(privateData->fd);
mmfile_free (privateData);
handle->privateData = NULL;
return MMFILE_IO_SUCCESS;
}
return MMFILE_IO_FAILED;
}
MMFileIOFunc mmfile_file_io_handler = {
"file",
file_open,
file_read,
file_write,
file_seek,
file_tell,
file_close,
};
|
