-
Notifications
You must be signed in to change notification settings - Fork 994
/
stdio.cpp
382 lines (322 loc) · 9.47 KB
/
stdio.cpp
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
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
/* mbed Microcontroller Library
* Copyright (c) 2006-2013 ARM Limited
*
* 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 "platform.h"
#include "FileHandle.h"
#include "FileSystemLike.h"
#include "FilePath.h"
#include "serial_api.h"
#include <errno.h>
#if defined(__ARMCC_VERSION)
# include <rt_sys.h>
# define PREFIX(x) _sys##x
# define OPEN_MAX _SYS_OPEN
# ifdef __MICROLIB
# pragma import(__use_full_stdio)
# endif
#elif defined(__ICCARM__)
# include <yfuns.h>
# define PREFIX(x) _##x
# define OPEN_MAX 16
# define STDIN_FILENO 0
# define STDOUT_FILENO 1
# define STDERR_FILENO 2
#else
# include <sys/stat.h>
# include <sys/unistd.h>
# include <sys/syslimits.h>
# define PREFIX(x) x
#endif
using namespace mbed;
extern const char __stdin_name[] = "/stdin";
extern const char __stdout_name[] = "/stdout";
extern const char __stderr_name[] = "/stderr";
/* newlib has the filehandle field in the FILE struct as a short, so
* we can't just return a Filehandle* from _open and instead have to
* put it in a filehandles array and return the index into that array
* (or rather index+3, as filehandles 0-2 are stdin/out/err).
*/
static FileHandle *filehandles[OPEN_MAX];
FileHandle::~FileHandle() {
/* Remove all open filehandles for this */
for (unsigned int fh_i = 0; fh_i < sizeof(filehandles)/sizeof(*filehandles); fh_i++) {
if (filehandles[fh_i] == this) {
filehandles[fh_i] = NULL;
}
}
}
#if DEVICE_SERIAL
extern int stdio_uart_inited;
extern serial_t stdio_uart;
#endif
static void init_serial() {
#if DEVICE_SERIAL
if (stdio_uart_inited) return;
serial_init(&stdio_uart, STDIO_UART_TX, STDIO_UART_RX);
serial_format(&stdio_uart, 8, ParityNone, 1);
serial_baud(&stdio_uart, 9600);
#endif
}
static inline int openmode_to_posix(int openmode) {
int posix = openmode;
#ifdef __ARMCC_VERSION
if (openmode & OPEN_PLUS) {
posix = O_RDWR;
} else if(openmode & OPEN_W) {
posix = O_WRONLY;
} else if(openmode & OPEN_A) {
posix = O_WRONLY|O_APPEND;
} else {
posix = O_RDONLY;
}
/* a, w, a+, w+ all create if file does not already exist */
if (openmode & (OPEN_A|OPEN_W)) {
posix |= O_CREAT;
}
/* w and w+ truncate */
if (openmode & OPEN_W) {
posix |= O_TRUNC;
}
#elif defined(__ICCARM__)
switch (openmode & _LLIO_RDWRMASK) {
case _LLIO_RDONLY: posix = O_RDONLY; break;
case _LLIO_WRONLY: posix = O_WRONLY; break;
case _LLIO_RDWR : posix = O_RDWR ; break;
}
if (openmode & _LLIO_CREAT ) posix |= O_CREAT;
if (openmode & _LLIO_APPEND) posix |= O_APPEND;
if (openmode & _LLIO_TRUNC ) posix |= O_TRUNC;
#endif
return posix;
}
extern "C" FILEHANDLE PREFIX(_open)(const char* name, int openmode) {
/* Use the posix convention that stdin,out,err are filehandles 0,1,2.
*/
if (std::strcmp(name, __stdin_name) == 0) {
init_serial();
return 0;
} else if (std::strcmp(name, __stdout_name) == 0) {
init_serial();
return 1;
} else if (std::strcmp(name,__stderr_name) == 0) {
init_serial();
return 2;
}
// find the first empty slot in filehandles
unsigned int fh_i;
for (fh_i = 0; fh_i < sizeof(filehandles)/sizeof(*filehandles); fh_i++) {
if (filehandles[fh_i] == NULL) break;
}
if (fh_i >= sizeof(filehandles)/sizeof(*filehandles)) {
return -1;
}
FileHandle *res;
/* FILENAME: ":0x12345678" describes a FileLike* */
if (name[0] == ':') {
void *p;
sscanf(name, ":%p", &p);
res = (FileHandle*)p;
/* FILENAME: "/file_system/file_name" */
} else {
FilePath path(name);
if (path.isFile()) {
res = path.file();
} else {
FileSystemLike *fs = path.fileSystem();
if (fs == NULL) return -1;
int posix_mode = openmode_to_posix(openmode);
res = fs->open(path.fileName(), posix_mode); /* NULL if fails */
}
}
if (res == NULL) return -1;
filehandles[fh_i] = res;
return fh_i + 3; // +3 as filehandles 0-2 are stdin/out/err
}
extern "C" int PREFIX(_close)(FILEHANDLE fh) {
if (fh < 3) return 0;
FileHandle* fhc = filehandles[fh-3];
filehandles[fh-3] = NULL;
if (fhc == NULL) return -1;
return fhc->close();
}
#if defined(__ICCARM__)
extern "C" size_t __write (int fh, const unsigned char *buffer, size_t length) {
#else
extern "C" int PREFIX(_write)(FILEHANDLE fh, const unsigned char *buffer, unsigned int length, int mode) {
#endif
int n; // n is the number of bytes written
if (fh < 3) {
#if DEVICE_SERIAL
if (!stdio_uart_inited) init_serial();
for (unsigned int i = 0; i < length; i++) {
serial_putc(&stdio_uart, buffer[i]);
}
#endif
n = length;
} else {
FileHandle* fhc = filehandles[fh-3];
if (fhc == NULL) return -1;
n = fhc->write(buffer, length);
}
#ifdef __ARMCC_VERSION
return length-n;
#else
return n;
#endif
}
#if defined(__ICCARM__)
extern "C" size_t __read (int fh, unsigned char *buffer, size_t length) {
#else
extern "C" int PREFIX(_read)(FILEHANDLE fh, unsigned char *buffer, unsigned int length, int mode) {
#endif
int n; // n is the number of bytes read
if (fh < 3) {
// only read a character at a time from stdin
#if DEVICE_SERIAL
*buffer = serial_getc(&stdio_uart);
#endif
n = 1;
} else {
FileHandle* fhc = filehandles[fh-3];
if (fhc == NULL) return -1;
n = fhc->read(buffer, length);
}
#ifdef __ARMCC_VERSION
return length-n;
#else
return n;
#endif
}
#ifdef __ARMCC_VERSION
extern "C" int PREFIX(_istty)(FILEHANDLE fh)
#else
extern "C" int _isatty(FILEHANDLE fh)
#endif
{
/* stdin, stdout and stderr should be tty */
if (fh < 3) return 1;
FileHandle* fhc = filehandles[fh-3];
if (fhc == NULL) return -1;
return fhc->isatty();
}
extern "C"
#if defined(__ARMCC_VERSION)
int _sys_seek(FILEHANDLE fh, long position)
#elif defined(__ICCARM__)
long __lseek(int fh, long offset, int whence)
#else
int _lseek(FILEHANDLE fh, int offset, int whence)
#endif
{
if (fh < 3) return 0;
FileHandle* fhc = filehandles[fh-3];
if (fhc == NULL) return -1;
#if defined(__ARMCC_VERSION)
return fhc->lseek(position, SEEK_SET);
#else
return fhc->lseek(offset, whence);
#endif
}
#ifdef __ARMCC_VERSION
extern "C" int PREFIX(_ensure)(FILEHANDLE fh) {
if (fh < 3) return 0;
FileHandle* fhc = filehandles[fh-3];
if (fhc == NULL) return -1;
return fhc->fsync();
}
extern "C" long PREFIX(_flen)(FILEHANDLE fh) {
if (fh < 3) return 0;
FileHandle* fhc = filehandles[fh-3];
if (fhc == NULL) return -1;
return fhc->flen();
}
#endif
#if !defined(__ARMCC_VERSION) && !defined(__ICCARM__)
extern "C" int _fstat(int fd, struct stat *st) {
if ((STDOUT_FILENO == fd) || (STDERR_FILENO == fd) || (STDIN_FILENO == fd)) {
st->st_mode = S_IFCHR;
return 0;
}
errno = EBADF;
return -1;
}
#endif
namespace std {
extern "C" int remove(const char *path) {
FilePath fp(path);
FileSystemLike *fs = fp.fileSystem();
if (fs == NULL) return -1;
return fs->remove(fp.fileName());
}
extern "C" int rename(const char *oldname, const char *newname) {
FilePath a(oldname);
FilePath b(newname);
if (!a.fileSystem() || a.fileSystem() != b.fileSystem()) return -1;
return a.fileSystem()->rename(a.fileName(), b.fileName());
}
extern "C" char *tmpnam(char *s) {
return NULL;
}
extern "C" FILE *tmpfile() {
return NULL;
}
} // namespace std
#ifdef __ARMCC_VERSION
extern "C" char *_sys_command_string(char *cmd, int len) {
return NULL;
}
#endif
extern "C" DIR *opendir(const char *path) {
/* root dir is FileSystemLike */
if (path[0] == '/' && path[1] == 0) {
return FileSystemLike::opendir();
}
FilePath fp(path);
FileSystemLike* fs = fp.fileSystem();
if (fs == NULL) return NULL;
return fs->opendir(fp.fileName());
}
extern "C" struct dirent *readdir(DIR *dir) {
return dir->readdir();
}
extern "C" int closedir(DIR *dir) {
return dir->closedir();
}
extern "C" void rewinddir(DIR *dir) {
dir->rewinddir();
}
extern "C" off_t telldir(DIR *dir) {
return dir->telldir();
}
extern "C" void seekdir(DIR *dir, off_t off) {
dir->seekdir(off);
}
extern "C" int mkdir(const char *path, mode_t mode) {
FilePath fp(path);
FileSystemLike *fs = fp.fileSystem();
if (fs == NULL) return -1;
return fs->mkdir(fp.fileName(), mode);
}
#if defined(TOOLCHAIN_GCC_CR) || defined(TOOLCHAIN_GCC_CS) || defined(TOOLCHAIN_GCC_ARM)
/* prevents the exception handling name demangling code getting pulled in */
#include "error.h"
namespace __gnu_cxx {
void __verbose_terminate_handler() {
error("Exception");
}
}
#endif
// Make sure we are pulling in the retargeting module at link time
volatile int stdio_retargeting_module;