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
|
/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013-2016 Damien P. George
*
* 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 <stdio.h>
#include <assert.h>
#include "py/mperrno.h"
#include "py/reader.h"
#if MICROPY_READER_FATFS
#if MICROPY_FATFS_OO
#include "lib/oofatfs/ff.h"
#else
#include "lib/fatfs/ff.h"
#endif
#include "extmod/fsusermount.h"
#include "extmod/vfs_fat.h"
typedef struct _mp_reader_fatfs_t {
FIL fp;
uint16_t len;
uint16_t pos;
byte buf[20];
} mp_reader_fatfs_t;
STATIC mp_uint_t mp_reader_fatfs_readbyte(void *data) {
mp_reader_fatfs_t *reader = (mp_reader_fatfs_t*)data;
if (reader->pos >= reader->len) {
if (reader->len < sizeof(reader->buf)) {
return MP_READER_EOF;
} else {
UINT n;
f_read(&reader->fp, reader->buf, sizeof(reader->buf), &n);
if (n == 0) {
return MP_READER_EOF;
}
reader->len = n;
reader->pos = 0;
}
}
return reader->buf[reader->pos++];
}
STATIC void mp_reader_fatfs_close(void *data) {
mp_reader_fatfs_t *reader = (mp_reader_fatfs_t*)data;
f_close(&reader->fp);
m_del_obj(mp_reader_fatfs_t, reader);
}
int mp_reader_new_file(mp_reader_t *reader, const char *filename) {
mp_reader_fatfs_t *rf = m_new_obj_maybe(mp_reader_fatfs_t);
if (rf == NULL) {
return MP_ENOMEM;
}
#if MICROPY_FATFS_OO
fs_user_mount_t *vfs = ff_get_vfs(&filename);
if (vfs == NULL) {
return MP_ENOENT;
}
FRESULT res = f_open(&vfs->fatfs, &rf->fp, filename, FA_READ);
#else
FRESULT res = f_open(&rf->fp, filename, FA_READ);
#endif
if (res != FR_OK) {
return fresult_to_errno_table[res];
}
UINT n;
f_read(&rf->fp, rf->buf, sizeof(rf->buf), &n);
rf->len = n;
rf->pos = 0;
reader->data = rf;
reader->readbyte = mp_reader_fatfs_readbyte;
reader->close = mp_reader_fatfs_close;
return 0; // success
}
#endif
|
