summaryrefslogtreecommitdiff
path: root/libc/stdio/_stdio.h
blob: acc6068c750edf1bed3b029841f15675d64e25e1 (plain)
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
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
/* Copyright (C) 2004-2005 Manuel Novoa III    <mjn3@codepoet.org>
 *
 * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
 *
 * Dedicated to Toni.  See uClibc/DEDICATION.mjn3 for details.
 */

#define _GNU_SOURCE

#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <signal.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <features.h>

#ifdef __UCLIBC_HAS_WCHAR__
#include <wchar.h>
#endif

#ifdef __UCLIBC_HAS_THREADS__
#include <pthread.h>

#define __STDIO_THREADLOCK_OPENLIST \
	__pthread_mutex_lock(&_stdio_openlist_lock)

#define __STDIO_THREADUNLOCK_OPENLIST \
	__pthread_mutex_unlock(&_stdio_openlist_lock)

#define __STDIO_THREADTRYLOCK_OPENLIST \
	__pthread_mutex_trylock(&_stdio_openlist_lock)

#else

#define	__STDIO_THREADLOCK_OPENLIST     ((void)0)
#define	__STDIO_THREADUNLOCK_OPENLIST   ((void)0)

#endif

#define __UNDEFINED_OR_NONPORTABLE ((void)0)

/**********************************************************************/
#ifdef __UCLIBC_HAS_GLIBC_CUSTOM_STREAMS__

extern __ssize_t _cs_read(void *cookie, char *buf, size_t bufsize) attribute_hidden;
extern __ssize_t _cs_write(void *cookie, const char *buf, size_t bufsize) attribute_hidden;
extern int _cs_seek(void *cookie, __offmax_t *pos, int whence) attribute_hidden;
extern int _cs_close(void *cookie) attribute_hidden;

#define __STDIO_STREAM_RESET_GCS(S) \
	(S)->__cookie = &((S)->__filedes); \
	(S)->__gcs.read = _cs_read; \
	(S)->__gcs.write = _cs_write; \
	(S)->__gcs.seek = _cs_seek; \
	(S)->__gcs.close = _cs_close


#define __READ(STREAMPTR,BUF,SIZE) \
	((((STREAMPTR)->__gcs.read) == NULL) ? -1 : \
	(((STREAMPTR)->__gcs.read)((STREAMPTR)->__cookie,(BUF),(SIZE))))
#define __WRITE(STREAMPTR,BUF,SIZE) \
	((((STREAMPTR)->__gcs.write) == NULL) ? -1 : \
	(((STREAMPTR)->__gcs.write)((STREAMPTR)->__cookie,(BUF),(SIZE))))
#define __SEEK(STREAMPTR,PPOS,WHENCE) \
	((((STREAMPTR)->__gcs.seek) == NULL) ? -1 : \
	(((STREAMPTR)->__gcs.seek)((STREAMPTR)->__cookie,(PPOS),(WHENCE))))
#define __CLOSE(STREAMPTR) \
	((((STREAMPTR)->__gcs.close) == NULL) ? 0 : \
	(((STREAMPTR)->__gcs.close)((STREAMPTR)->__cookie)))

#else  /* __UCLIBC_HAS_GLIBC_CUSTOM_STREAMS__ */

extern int __stdio_seek(FILE *stream, register __offmax_t *pos, int whence) attribute_hidden;

#define __STDIO_STREAM_RESET_GCS(S) ((void)0)

#define __READ(STREAMPTR,BUF,SIZE) \
	(read((STREAMPTR)->__filedes,(BUF),(SIZE)))
#define __WRITE(STREAMPTR,BUF,SIZE) \
	(write((STREAMPTR)->__filedes,(BUF),(SIZE)))
#define __SEEK(STREAMPTR,PPOS,WHENCE) \
	(__stdio_seek((STREAMPTR),(PPOS),(WHENCE)))
#define __CLOSE(STREAMPTR) \
	(close((STREAMPTR)->__filedes))

#endif /* __UCLIBC_HAS_GLIBC_CUSTOM_STREAMS__ */

/**********************************************************************/
#ifdef __UCLIBC_HAS_WCHAR__

#define __STDIO_STREAM_TRANS_TO_WRITE(S,O)	__stdio_trans2w_o((S), (O))
#define __STDIO_STREAM_TRANS_TO_READ(S,O)	__stdio_trans2r_o((S), (O))

#else

#define __STDIO_STREAM_TRANS_TO_WRITE(S,O)	__stdio_trans2w((S))
#define __STDIO_STREAM_TRANS_TO_READ(S,O)	__stdio_trans2r((S))

#endif
/**********************************************************************/

#define __STDIO_STREAM_IS_READING(S) ((S)->__modeflags & __MASK_READING)
#define __STDIO_STREAM_IS_WRITING(S) ((S)->__modeflags & __FLAG_WRITING)

#define __STDIO_STREAM_SET_READING(S) ((S)->__modeflags |= __FLAG_READING)
#define __STDIO_STREAM_SET_WRITING(S) ((S)->__modeflags |= __FLAG_WRITING)

#define __STDIO_STREAM_IS_READING_OR_READONLY(S) \
	((S)->__modeflags & (__MASK_READING|__FLAG_READONLY))

#define __STDIO_STREAM_IS_WRITING_OR_WRITEONLY(S) \
	((S)->__modeflags & (__FLAG_WRITING|__FLAG_WRITEONLY))

#define __STDIO_STREAM_IS_READONLY(S) ((S)->__modeflags & __FLAG_READONLY)
#define __STDIO_STREAM_IS_WRITEONLY(S) ((S)->__modeflags & __FLAG_WRITEONLY)


/**********************************************************************/
#ifdef __UCLIBC_HAS_WCHAR__

#define __STDIO_STREAM_IS_NARROW_WRITING(S)   \
	(((S)->__modeflags & (__FLAG_WRITING|__FLAG_NARROW)) \
	 == (__FLAG_WRITING|__FLAG_NARROW))

#define __STDIO_STREAM_IS_WIDE_WRITING(S)   \
	(((S)->__modeflags & (__FLAG_WRITING|__FLAG_WIDE)) \
	 == (__FLAG_WRITING|__FLAG_WIDE))

#if (__FLAG_NARROW <= __MASK_READING)
#error assumption violated regarding __FLAG_NARROW
#endif

#define __STDIO_STREAM_IS_NARROW_READING(S)   \
	(((S)->__modeflags & (__MASK_READING|__FLAG_NARROW)) > __FLAG_NARROW)

#define __STDIO_STREAM_IS_WIDE_READING(S)   \
	(((S)->__modeflags & (__MASK_READING|__FLAG_WIDE)) > __FLAG_WIDE)

#define __STDIO_STREAM_IS_NARROW(S)		((S)->__modeflags & __FLAG_NARROW)
#define __STDIO_STREAM_IS_WIDE(S)		((S)->__modeflags & __FLAG_WIDE)

#define __STDIO_STREAM_SET_NARROW(S) \
	((void)((S)->__modeflags |= __FLAG_NARROW))
#define __STDIO_STREAM_SET_WIDE(S) \
	((void)((S)->__modeflags |= __FLAG_WIDE))

#else

#define __STDIO_STREAM_IS_NARROW_WRITING(S)  __STDIO_STREAM_IS_WRITING(S)

#define __STDIO_STREAM_IS_NARROW_READING(S)  __STDIO_STREAM_IS_READING(S)

#define __STDIO_STREAM_IS_NARROW(S)		(1)
#define __STDIO_STREAM_IS_WIDE(S)		(0)

#define __STDIO_STREAM_SET_NARROW(S)	((void)0)
#define __STDIO_STREAM_SET_WIDE(S)		((void)0)

#endif
/**********************************************************************/

#define __STDIO_STREAM_SET_EOF(S) \
	((void)((S)->__modeflags |= __FLAG_EOF))
#define __STDIO_STREAM_SET_ERROR(S) \
	((void)((S)->__modeflags |= __FLAG_ERROR))

#define __STDIO_STREAM_CLEAR_EOF(S) \
	((void)((S)->__modeflags &= ~__FLAG_EOF))
#define __STDIO_STREAM_CLEAR_ERROR(S) \
	((void)((S)->__modeflags &= ~__FLAG_ERROR))

#define __STDIO_STREAM_CLEAR_READING_AND_UNGOTS(S) \
	((void)((S)->__modeflags &= ~__MASK_READING))
#define __STDIO_STREAM_CLEAR_WRITING(S) \
	((void)((S)->__modeflags &= ~__FLAG_WRITING))

#ifdef __UCLIBC_HAS_STDIO_GETC_MACRO__
# define __STDIO_STREAM_DISABLE_GETC(S) \
	((void)((S)->__bufgetc_u = (S)->__bufstart))
# define __STDIO_STREAM_ENABLE_GETC(S) \
	((void)((S)->__bufgetc_u = (S)->__bufread))
# define __STDIO_STREAM_CAN_USE_BUFFER_GET(S) \
	((S)->__bufpos < (S)->__bufgetc_u)
#else
# define __STDIO_STREAM_DISABLE_GETC(S)			((void)0)
# define __STDIO_STREAM_ENABLE_GETC(S)			((void)0)
# define __STDIO_STREAM_CAN_USE_BUFFER_GET(S)	(0)
#endif

#ifdef __UCLIBC_HAS_STDIO_PUTC_MACRO__
# define __STDIO_STREAM_DISABLE_PUTC(S) \
	((void)((S)->__bufputc_u = (S)->__bufstart))
# define __STDIO_STREAM_ENABLE_PUTC(S) \
	((void)((S)->__bufputc_u = (S)->__bufend))
# define __STDIO_STREAM_CAN_USE_BUFFER_ADD(S) \
	((S)->__bufpos < (S)->__bufputc_u)
#else
# define __STDIO_STREAM_DISABLE_PUTC(S)			((void)0)
# define __STDIO_STREAM_ENABLE_PUTC(S)			((void)0)
# define __STDIO_STREAM_CAN_USE_BUFFER_ADD(S)	(0)
#endif

#ifdef __UCLIBC_HAS_GLIBC_CUSTOM_STREAMS__
#define __STDIO_STREAM_IS_CUSTOM(S)		((S)->__cookie != &((S)->__filedes))
#else
#define __STDIO_STREAM_IS_CUSTOM(S)		(0)
#endif

/**********************************************************************/

#ifdef __STDIO_BUFFERS
#define __STDIO_STREAM_FREE_BUFFER(S) \
	do { if ((S)->__modeflags & __FLAG_FREEBUF) free((S)->__bufstart); } while (0)
#else
#define __STDIO_STREAM_FREE_BUFFER(S) ((void)0)
#endif

#define __STDIO_STREAM_FREE_FILE(S) \
	do { if ((S)->__modeflags & __FLAG_FREEFILE) free((S)); } while (0)


#ifdef __UCLIBC_HAS_LFS__
#define __STDIO_WHEN_LFS(E) E
#else
#define __STDIO_WHEN_LFS(E) ((void)0)
#endif

/**********************************************************************/
/* The following return 0 on success. */

#ifdef __STDIO_BUFFERS
/* Assume stream in valid writing state.  Do not reset writing flag
 * or disble putc macro unless error. */
/* Should we assume that buffer is not empty to avoid a check? */
extern size_t __stdio_wcommit(FILE *__restrict stream) attribute_hidden;

/* Remember to fail if at EOF! */
extern size_t __stdio_rfill(FILE *__restrict stream) attribute_hidden;

extern size_t __stdio_fwrite(const unsigned char *__restrict buffer,
				 size_t bytes, FILE *__restrict stream) attribute_hidden;
#else

#define __stdio_fwrite(B,N,S)  __stdio_WRITE((S),(B),(N))

#endif

extern size_t __stdio_WRITE(FILE *stream, const unsigned char *buf,
							size_t bufsize) attribute_hidden;
extern size_t __stdio_READ(FILE *stream, unsigned char *buf, size_t bufsize) attribute_hidden;

extern int __stdio_trans2r(FILE *__restrict stream) attribute_hidden;
extern int __stdio_trans2w(FILE *__restrict stream) attribute_hidden;

extern int __stdio_trans2r_o(FILE *__restrict stream, int oflag) attribute_hidden;
extern int __stdio_trans2w_o(FILE *__restrict stream, int oflag) attribute_hidden;

/**********************************************************************/
#ifdef __STDIO_BUFFERS

#define __STDIO_STREAM_IS_FBF(S)		(!((S)->__modeflags & __MASK_BUFMODE))
#define __STDIO_STREAM_IS_LBF(S)		((S)->__modeflags & __FLAG_LBF)
#define __STDIO_STREAM_IS_NBF(S)		((S)->__modeflags & __FLAG_NBF)

#define __STDIO_STREAM_BUFFER_SIZE(S)		((S)->__bufend - (S)->__bufstart)

/* Valid when writing... */
#define __STDIO_STREAM_BUFFER_ADD(S,C)		(*(S)->__bufpos++ = (C))
#define __STDIO_STREAM_BUFFER_UNADD(S)		(--(S)->__bufpos)
#define __STDIO_STREAM_BUFFER_WAVAIL(S)		((S)->__bufend - (S)->__bufpos)
#define __STDIO_STREAM_BUFFER_WUSED(S)		((S)->__bufpos - (S)->__bufstart)
#define __STDIO_COMMIT_WRITE_BUFFER(S)		__stdio_wcommit((S))
#ifdef __UCLIBC_HAS_WCHAR__
#define __STDIO_STREAM_IS_NARROW_FBF(S) \
	(!((S)->__modeflags & (__MASK_BUFMODE|__FLAG_WIDE)))
#else
#define __STDIO_STREAM_IS_NARROW_FBF(S)		__STDIO_STREAM_IS_FBF((S))
#endif

/* Valid when reading... */
#define __STDIO_STREAM_BUFFER_RAVAIL(S)		((S)->__bufread - (S)->__bufpos)
#define __STDIO_STREAM_BUFFER_GET(S)		(*(S)->__bufpos++)
#define __STDIO_FILL_READ_BUFFER(S)			__stdio_rfill((S))

#define __STDIO_STREAM_INIT_BUFREAD_BUFPOS(S) \
	(S)->__bufread = (S)->__bufpos = (S)->__bufstart


#define __STDIO_STREAM_FAKE_VSNPRINTF_FILEDES		(-2)
#define __STDIO_STREAM_FAKE_VSSCANF_FILEDES			(-2)
#define __STDIO_STREAM_FAKE_VSWPRINTF_FILEDES		(-3)
#define __STDIO_STREAM_FAKE_VSWSCANF_FILEDES		(-3)

#define __STDIO_STREAM_IS_FAKE_VSNPRINTF(S) \
	((S)->__filedes == __STDIO_STREAM_FAKE_VSNPRINTF_FILEDES)
#define __STDIO_STREAM_IS_FAKE_VSSCANF(S) \
	((S)->__filedes == __STDIO_STREAM_FAKE_VSSCANF_FILEDES)
#define __STDIO_STREAM_IS_FAKE_VSWPRINTF(S) \
	((S)->__filedes == __STDIO_STREAM_FAKE_VSWPRINTF_FILEDES)
#define __STDIO_STREAM_IS_FAKE_VSWSCANF(S) \
	((S)->__filedes == __STDIO_STREAM_FAKE_VSWSCANF_FILEDES)

#else  /* __STDIO_BUFFERS */

#define __STDIO_STREAM_IS_FBF(S)					(0)
#define __STDIO_STREAM_IS_LBF(S)					(0)
#define __STDIO_STREAM_IS_NBF(S)					(1)

#define __STDIO_STREAM_BUFFER_SIZE(S)				(0)
#define __STDIO_STREAM_BUFFER_ADD(S,C)				((void)0)
#define __STDIO_STREAM_BUFFER_UNADD(S)				((void)0)
#define __STDIO_STREAM_BUFFER_WAVAIL(S)				(0)
#define __STDIO_STREAM_BUFFER_WUSED(S)				(0)
#define __STDIO_COMMIT_WRITE_BUFFER(S)				(0)
#define __STDIO_STREAM_IS_NARROW_FBF(S)				(0)

#define __STDIO_STREAM_BUFFER_RAVAIL(S)				(0)
#define __STDIO_STREAM_BUFFER_GET(S)				(EOF)
#define __STDIO_FILL_READ_BUFFER(S)					(0)
#define __STDIO_STREAM_INIT_BUFREAD_BUFPOS(S)		((void)0)

#undef __STDIO_STREAM_FAKE_VSNPRINTF_FILEDES
#undef __STDIO_STREAM_FAKE_VSSCANF_FILEDES
#undef __STDIO_STREAM_FAKE_VSWPRINTF_FILEDES

#define __STDIO_STREAM_IS_FAKE_VSNPRINTF(S)			(0)
#define __STDIO_STREAM_IS_FAKE_VSSCANF(S)			(0)
#undef __STDIO_STREAM_IS_FAKE_VSWPRINTF

# ifdef __USE_OLD_VFPRINTF__
#  define __STDIO_STREAM_FAKE_VSNPRINTF_FILEDES_NB	(-2)
#  define __STDIO_STREAM_IS_FAKE_VSNPRINTF_NB(S) \
	((S)->__filedes == __STDIO_STREAM_FAKE_VSNPRINTF_FILEDES_NB)
# endif

# ifndef __UCLIBC_HAS_WCHAR__
#  define __STDIO_STREAM_FAKE_VSSCANF_FILEDES_NB	(-2)
#  define __STDIO_STREAM_IS_FAKE_VSSCANF_NB(S) \
	((S)->__filedes == __STDIO_STREAM_FAKE_VSSCANF_FILEDES_NB)
# endif

#endif /* __STDIO_BUFFERS */
/**********************************************************************/

extern int __fputs_unlocked(const char *__restrict s, FILE *__restrict stream) attribute_hidden;

extern int __putchar_unlocked(int c);


extern size_t __fwrite_unlocked(const void *__restrict ptr, size_t size,
						size_t nmemb, FILE *__restrict stream) attribute_hidden;

extern size_t __fread_unlocked(void *__restrict ptr, size_t size,
						size_t nmemb, FILE *__restrict stream) attribute_hidden;

extern int __libc_fputc_unlocked(int c, FILE *stream) attribute_hidden;

extern int __fflush_unlocked(FILE *stream) attribute_hidden;

extern int __stdio_adjust_position(FILE *__restrict stream, __offmax_t *pos) attribute_hidden;

extern void __clearerr_unlocked(FILE *stream);
extern int __feof_unlocked(FILE *stream);
extern int __ferror_unlocked(FILE *stream);

extern int __libc_fgetc_unlocked(FILE *stream) attribute_hidden;
extern char *__fgets_unlocked(char *__restrict s, int n,
					FILE * __restrict stream) attribute_hidden;

extern int __fileno_unlocked(FILE *stream) attribute_hidden;

extern int __getchar_unlocked(void) attribute_hidden;

extern int __fseek(FILE *stream, long int offset, int whence) attribute_hidden;
extern long int __ftell(FILE *stream) attribute_hidden;
#ifdef __UCLIBC_HAS_LFS__
extern int __fseeko64(FILE *stream, __off64_t offset, int whence) attribute_hidden;
extern __off64_t __ftello64(FILE *stream) attribute_hidden;
#endif

#ifdef __STDIO_HAS_OPENLIST
	/* Uses an implementation hack!!! */
#define __STDIO_FLUSH_LBF_STREAMS  __fflush_unlocked((FILE *) &_stdio_openlist)
#else
#define __STDIO_FLUSH_LBF_STREAMS		((void)0)
#endif

#ifdef NDEBUG
#define __STDIO_STREAM_VALIDATE(S)		((void)0)
#else
extern void _stdio_validate_FILE(const FILE *stream);
#define __STDIO_STREAM_VALIDATE(S)		_stdio_validate_FILE((S))
#endif

#ifdef __STDIO_MBSTATE
#define __COPY_MBSTATE(dest,src) \
	((void)((dest)->__mask = (src)->__mask, (dest)->__wc = (src)->__wc))
#define __INIT_MBSTATE(dest)			((void)((dest)->__mask = 0))
#else
#define __COPY_MBSTATE(dest,src)		((void)0)
#define __INIT_MBSTATE(dest)			((void)0)
#endif

/**********************************************************************/

extern int _stdio_adjpos(FILE *__restrict stream, __offmax_t * pos);
extern int _stdio_lseek(FILE *stream, __offmax_t *pos, int whence);

extern size_t _stdio_fwrite(const unsigned char *buffer, size_t bytes,
							FILE *stream);
extern size_t _stdio_fread(unsigned char *buffer, size_t bytes,
						   FILE *stream);

extern FILE *_stdio_fopen(intptr_t fname_or_mode,
				  const char *__restrict mode,
				  FILE *__restrict stream, int filedes) attribute_hidden;

#ifdef __UCLIBC_HAS_WCHAR__
extern size_t _wstdio_fwrite(const wchar_t *__restrict ws, size_t n,
						 FILE *__restrict stream) attribute_hidden;

extern wint_t __fgetwc_unlocked(register FILE *stream) attribute_hidden;
extern wint_t __fputwc_unlocked(wchar_t wc, FILE *stream) attribute_hidden;
#endif

/**********************************************************************/
/* Only use the macro below if you know fp is a valid FILE for a valid fd.
 * This is _not_ true for custom streams! */
#define __FILENO_UNLOCKED(fp)	((fp)->__filedes)

#define __FEOF_OR_FERROR_UNLOCKED(stream) \
	((stream)->__modeflags & (__FLAG_EOF|__FLAG_ERROR))

#if defined(__STDIO_BUFFERS) || defined(__USE_OLD_VFPRINTF__) || defined(__UCLIBC_HAS_GLIBC_CUSTOM_STREAMS__)
#define __STDIO_HAS_VSNPRINTF 1
#endif