Repository navigation
Expand file tree
/
Copy pathvfs_posix_file.c
More file actions
243 lines (215 loc) · 8.04 KB
/
Copy pathvfs_posix_file.c
File metadata and controls
243 lines (215 loc) · 8.04 KB
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
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
// SPDX-FileCopyrightText: 2014 MicroPython & CircuitPython contributors (https://github.com/adafruit/circuitpython/graphs/contributors)
// SPDX-FileCopyrightText: Copyright (c) 2013-2018 Damien P. George
//
// SPDX-License-Identifier: MIT
#include "py/runtime.h"
#include "py/stream.h"
#include "extmod/vfs_posix.h"
#include "supervisor/shared/translate.h"
#if defined(MICROPY_VFS_POSIX) && MICROPY_VFS_POSIX
#include <fcntl.h>
#ifdef _WIN32
#define fsync _commit
#endif
typedef struct _mp_obj_vfs_posix_file_t {
mp_obj_base_t base;
int fd;
} mp_obj_vfs_posix_file_t;
#ifdef MICROPY_CPYTHON_COMPAT
STATIC void check_fd_is_open(const mp_obj_vfs_posix_file_t *o) {
if (o->fd < 0) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, translate("I/O operation on closed file")));
}
}
#else
#define check_fd_is_open(o)
#endif
STATIC void vfs_posix_file_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
(void)kind;
mp_obj_vfs_posix_file_t *self = MP_OBJ_TO_PTR(self_in);
mp_printf(print, "<io.%q %d>", mp_obj_get_type_qstr(self_in), self->fd);
}
mp_obj_t mp_vfs_posix_file_open(const mp_obj_type_t *type, mp_obj_t file_in, mp_obj_t mode_in) {
mp_obj_vfs_posix_file_t *o = m_new_obj(mp_obj_vfs_posix_file_t);
const char *mode_s = mp_obj_str_get_str(mode_in);
int mode_rw = 0, mode_x = 0;
while (*mode_s) {
switch (*mode_s++) {
case 'r':
mode_rw = O_RDONLY;
break;
case 'w':
mode_rw = O_WRONLY;
mode_x = O_CREAT | O_TRUNC;
break;
case 'a':
mode_rw = O_WRONLY;
mode_x = O_CREAT | O_APPEND;
break;
case '+':
mode_rw = O_RDWR;
break;
#if MICROPY_PY_IO_FILEIO
// If we don't have io.FileIO, then files are in text mode implicitly
case 'b':
type = &mp_type_vfs_posix_fileio;
break;
case 't':
type = &mp_type_vfs_posix_textio;
break;
#endif
}
}
o->base.type = type;
mp_obj_t fid = file_in;
if (MP_OBJ_IS_SMALL_INT(fid)) {
o->fd = MP_OBJ_SMALL_INT_VALUE(fid);
return MP_OBJ_FROM_PTR(o);
}
const char *fname = mp_obj_str_get_str(fid);
int fd = open(fname, mode_x | mode_rw, 0644);
if (fd == -1) {
mp_raise_OSError(errno);
}
o->fd = fd;
return MP_OBJ_FROM_PTR(o);
}
STATIC mp_obj_t vfs_posix_file_make_new(const mp_obj_type_t *type, size_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_file, MP_ARG_OBJ | MP_ARG_REQUIRED, {.u_rom_obj = MP_ROM_PTR(&mp_const_none_obj)} },
{ MP_QSTR_mode, MP_ARG_OBJ, {.u_rom_obj = MP_ROM_QSTR(MP_QSTR_r)} },
};
mp_arg_val_t arg_vals[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args, args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, arg_vals);
return mp_vfs_posix_file_open(type, arg_vals[0].u_obj, arg_vals[1].u_obj);
}
STATIC mp_obj_t vfs_posix_file_fileno(mp_obj_t self_in) {
mp_obj_vfs_posix_file_t *self = MP_OBJ_TO_PTR(self_in);
check_fd_is_open(self);
return MP_OBJ_NEW_SMALL_INT(self->fd);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(vfs_posix_file_fileno_obj, vfs_posix_file_fileno);
STATIC mp_obj_t vfs_posix_file___exit__(size_t n_args, const mp_obj_t *args) {
(void)n_args;
return mp_stream_close(args[0]);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(vfs_posix_file___exit___obj, 4, 4, vfs_posix_file___exit__);
STATIC mp_uint_t vfs_posix_file_read(mp_obj_t o_in, void *buf, mp_uint_t size, int *errcode) {
mp_obj_vfs_posix_file_t *o = MP_OBJ_TO_PTR(o_in);
check_fd_is_open(o);
mp_int_t r = read(o->fd, buf, size);
if (r == -1) {
*errcode = errno;
return MP_STREAM_ERROR;
}
return r;
}
STATIC mp_uint_t vfs_posix_file_write(mp_obj_t o_in, const void *buf, mp_uint_t size, int *errcode) {
mp_obj_vfs_posix_file_t *o = MP_OBJ_TO_PTR(o_in);
check_fd_is_open(o);
#if MICROPY_PY_OS_DUPTERM
if (o->fd <= STDERR_FILENO) {
mp_hal_stdout_tx_strn(buf, size);
return size;
}
#endif
mp_int_t r = write(o->fd, buf, size);
while (r == -1 && errno == EINTR) {
if (MP_STATE_VM(mp_pending_exception) != MP_OBJ_NULL) {
mp_obj_t obj = MP_STATE_VM(mp_pending_exception);
MP_STATE_VM(mp_pending_exception) = MP_OBJ_NULL;
nlr_raise(obj);
}
r = write(o->fd, buf, size);
}
if (r == -1) {
*errcode = errno;
return MP_STREAM_ERROR;
}
return r;
}
STATIC mp_uint_t vfs_posix_file_ioctl(mp_obj_t o_in, mp_uint_t request, uintptr_t arg, int *errcode) {
mp_obj_vfs_posix_file_t *o = MP_OBJ_TO_PTR(o_in);
check_fd_is_open(o);
switch (request) {
case MP_STREAM_FLUSH:
if (fsync(o->fd) < 0) {
*errcode = errno;
return MP_STREAM_ERROR;
}
return 0;
case MP_STREAM_SEEK: {
struct mp_stream_seek_t *s = (struct mp_stream_seek_t*)arg;
off_t off = lseek(o->fd, s->offset, s->whence);
if (off == (off_t)-1) {
*errcode = errno;
return MP_STREAM_ERROR;
}
s->offset = off;
return 0;
}
case MP_STREAM_CLOSE:
close(o->fd);
#ifdef MICROPY_CPYTHON_COMPAT
o->fd = -1;
#endif
return 0;
default:
*errcode = EINVAL;
return MP_STREAM_ERROR;
}
}
STATIC const mp_rom_map_elem_t rawfile_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_fileno), MP_ROM_PTR(&vfs_posix_file_fileno_obj) },
{ MP_ROM_QSTR(MP_QSTR_read), MP_ROM_PTR(&mp_stream_read_obj) },
{ MP_ROM_QSTR(MP_QSTR_readinto), MP_ROM_PTR(&mp_stream_readinto_obj) },
{ MP_ROM_QSTR(MP_QSTR_readline), MP_ROM_PTR(&mp_stream_unbuffered_readline_obj) },
{ MP_ROM_QSTR(MP_QSTR_readlines), MP_ROM_PTR(&mp_stream_unbuffered_readlines_obj) },
{ MP_ROM_QSTR(MP_QSTR_write), MP_ROM_PTR(&mp_stream_write_obj) },
{ MP_ROM_QSTR(MP_QSTR_seek), MP_ROM_PTR(&mp_stream_seek_obj) },
{ MP_ROM_QSTR(MP_QSTR_tell), MP_ROM_PTR(&mp_stream_tell_obj) },
{ MP_ROM_QSTR(MP_QSTR_flush), MP_ROM_PTR(&mp_stream_flush_obj) },
{ MP_ROM_QSTR(MP_QSTR_close), MP_ROM_PTR(&mp_stream_close_obj) },
{ MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&mp_identity_obj) },
{ MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&vfs_posix_file___exit___obj) },
};
STATIC MP_DEFINE_CONST_DICT(rawfile_locals_dict, rawfile_locals_dict_table);
#if MICROPY_PY_IO_FILEIO
STATIC const mp_stream_p_t fileio_stream_p = {
MP_PROTO_IMPLEMENT(MP_QSTR_protocol_stream)
.read = vfs_posix_file_read,
.write = vfs_posix_file_write,
.ioctl = vfs_posix_file_ioctl,
};
const mp_obj_type_t mp_type_vfs_posix_fileio = {
{ &mp_type_type },
.name = MP_QSTR_FileIO,
.print = vfs_posix_file_print,
.make_new = vfs_posix_file_make_new,
.getiter = mp_identity_getiter,
.iternext = mp_stream_unbuffered_iter,
.protocol = &fileio_stream_p,
.locals_dict = (mp_obj_dict_t*)&rawfile_locals_dict,
};
#endif
STATIC const mp_stream_p_t textio_stream_p = {
MP_PROTO_IMPLEMENT(MP_QSTR_protocol_stream)
.read = vfs_posix_file_read,
.write = vfs_posix_file_write,
.ioctl = vfs_posix_file_ioctl,
.is_text = true,
};
const mp_obj_type_t mp_type_vfs_posix_textio = {
{ &mp_type_type },
.name = MP_QSTR_TextIOWrapper,
.print = vfs_posix_file_print,
.make_new = vfs_posix_file_make_new,
.getiter = mp_identity_getiter,
.iternext = mp_stream_unbuffered_iter,
.protocol = &textio_stream_p,
.locals_dict = (mp_obj_dict_t*)&rawfile_locals_dict,
};
const mp_obj_vfs_posix_file_t mp_sys_stdin_obj = {{&mp_type_textio}, STDIN_FILENO};
const mp_obj_vfs_posix_file_t mp_sys_stdout_obj = {{&mp_type_textio}, STDOUT_FILENO};
const mp_obj_vfs_posix_file_t mp_sys_stderr_obj = {{&mp_type_textio}, STDERR_FILENO};
#endif // MICROPY_VFS_POSIX