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uClibc_stdio.h @ 43

Last change on this file since 43 was 43, checked in by megakiss, 11 years ago
광주방송 OTC 주파수 369Mhz로 변경
Property svn:executable set to ``*
File size: 15.7 KB

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1	/* Copyright (C) 2002-2004 Manuel Novoa III <mjn3@codepoet.org>
2	*
3	* GNU Library General Public License (LGPL) version 2 or later.
4	*
5	* Dedicated to Toni. See uClibc/DEDICATION.mjn3 for details.
6	*/
7
8	#ifndef _STDIO_H
9	#error Always include <stdio.h> rather than <bits/uClibc_stdio.h>
10	#endif
11
12	/**********************************************************************/
13
14	#define __STDIO_BUFFERS
15	/* ANSI/ISO mandate at least 256. */
16	#if defined(__UCLIBC_HAS_STDIO_BUFSIZ_NONE__)
17	/* Fake this because some apps use stdio.h BUFSIZ. */
18	#define __STDIO_BUFSIZ 256
19	#undef __STDIO_BUFFERS
20	#elif defined(__UCLIBC_HAS_STDIO_BUFSIZ_256__)
21	#define __STDIO_BUFSIZ 256
22	#elif defined(__UCLIBC_HAS_STDIO_BUFSIZ_512__)
23	#define __STDIO_BUFSIZ 512
24	#elif defined(__UCLIBC_HAS_STDIO_BUFSIZ_1024__)
25	#define __STDIO_BUFSIZ 1024
26	#elif defined(__UCLIBC_HAS_STDIO_BUFSIZ_2048__)
27	#define __STDIO_BUFSIZ 2048
28	#elif defined(__UCLIBC_HAS_STDIO_BUFSIZ_4096__)
29	#define __STDIO_BUFSIZ 4096
30	#elif defined(__UCLIBC_HAS_STDIO_BUFSIZ_8192__)
31	#define __STDIO_BUFSIZ 8192
32	#else
33	#error config seems to be out of sync regarding bufsiz options
34	#endif
35
36	#ifdef __UCLIBC_HAS_STDIO_BUFSIZ_NONE__
37	#define __STDIO_BUILTIN_BUF_SIZE 0
38	#else /* __UCLIBC_HAS_STDIO_BUFSIZ_NONE__ */
39	#if defined(__UCLIBC_HAS_STDIO_BUILTIN_BUFFER_NONE__)
40	#define __STDIO_BUILTIN_BUF_SIZE 0
41	#elif defined(__UCLIBC_HAS_STDIO_BUILTIN_BUFFER_4__)
42	#define __STDIO_BUILTIN_BUF_SIZE 4
43	#elif defined(__UCLIBC_HAS_STDIO_BUILTIN_BUFFER_8__)
44	#define __STDIO_BUILTIN_BUF_SIZE 8
45	#else
46	#error config seems to be out of sync regarding builtin buffer size
47	#endif
48	#endif
49
50	#if defined(__STDIO_BUFFERS) \|\| defined(__UCLIBC_HAS_GLIBC_CUSTOM_STREAMS__) \|\| defined(__UCLIBC_HAS_THREADS__)
51	#define __STDIO_HAS_OPENLIST 1
52	#else
53	#undef __STDIO_HAS_OPENLIST
54	#endif
55
56	/**********************************************************************/
57	/* Make sure defines related to large files are consistent. */
58	#ifdef _LIBC
59
60	#ifdef __UCLIBC_HAS_LFS__
61	#undef __USE_LARGEFILE
62	#undef __USE_LARGEFILE64
63	#undef __USE_FILE_OFFSET64
64	/* If we're actually building uClibc with large file support, only define... */
65	#define __USE_LARGEFILE64 1
66	#endif /* __UCLIBC_HAS_LFS__ */
67
68	#else /* not _LIBC */
69
70	#ifndef __UCLIBC_HAS_LFS__
71	#if defined(__LARGEFILE64_SOURCE) \|\| defined(__USE_LARGEFILE64) \|\| defined(__USE_FILE_OFFSET64)
72	#error Sorry... uClibc was built without large file support!
73	#endif
74	#endif /* __UCLIBC_HAS_LFS__ */
75
76	#endif /* _LIBC */
77	/**********************************************************************/
78	#ifdef __UCLIBC_HAS_WCHAR__
79
80	#define __need_wchar_t
81	#include <stddef.h>
82
83	/* Note: we don't really need mbstate for 8-bit locales. We do for UTF-8.
84	* For now, always use it. */
85	#define __STDIO_MBSTATE
86	#define __need_mbstate_t
87	#include <wchar.h>
88
89	#endif
90	/**********************************************************************/
91	/* Currently unimplemented/untested */
92	/* #define __STDIO_FLEXIBLE_SETVBUF */
93
94	#ifdef __UCLIBC_HAS_STDIO_GETC_MACRO__
95	#define __STDIO_GETC_MACRO
96	#endif
97
98	#ifdef __UCLIBC_HAS_STDIO_PUTC_MACRO__
99	#define __STDIO_PUTC_MACRO
100	#endif
101
102
103	/* These are consistency checks on the different options */
104
105	#ifndef __STDIO_BUFFERS
106	#undef __STDIO_GETC_MACRO
107	#undef __STDIO_PUTC_MACRO
108	#endif
109
110	#ifdef __BCC__
111	#undef __UCLIBC_HAS_LFS__
112	#endif
113
114	#ifndef __UCLIBC_HAS_LFS__
115	#undef __UCLIBC_HAS_FOPEN_LARGEFILE_MODE__
116	#endif
117
118	/**********************************************************************/
119	#ifdef __UCLIBC_HAS_THREADS__
120	/* Need this for pthread_mutex_t. */
121	#include <bits/pthreadtypes.h>
122
123	/* user_locking
124	* 0 : do auto locking/unlocking
125	* 1 : user does locking/unlocking
126	* 2 : initial state prior to thread initialization
127	* with no auto locking/unlocking
128	*
129	* When threading is initialized, walk the stdio open stream list
130	* and do "if (user_locking == 2) user_locking = 0;".
131	*
132	* This way, we avoid calling the weak lock/unlock functions.
133	*/
134
135	#define __STDIO_AUTO_THREADLOCK_VAR int __infunc_user_locking
136
137	#define __STDIO_AUTO_THREADLOCK(__stream) \
138	if ((__infunc_user_locking = (__stream)->__user_locking) == 0) { \
139	__pthread_mutex_lock(&(__stream)->__lock); \
140	}
141
142	#define __STDIO_AUTO_THREADUNLOCK(__stream) \
143	if (__infunc_user_locking == 0) { \
144	__pthread_mutex_unlock(&(__stream)->__lock); \
145	}
146
147	#define __STDIO_SET_USER_LOCKING(__stream) ((__stream)->__user_locking = 1)
148
149	#define __STDIO_ALWAYS_THREADLOCK(__stream) \
150	__pthread_mutex_lock(&(__stream)->__lock)
151
152	#define __STDIO_ALWAYS_THREADTRYLOCK(__stream) \
153	__pthread_mutex_trylock(&(__stream)->__lock)
154
155	#define __STDIO_ALWAYS_THREADUNLOCK(__stream) \
156	__pthread_mutex_unlock(&(__stream)->__lock)
157
158	#else /* __UCLIBC_HAS_THREADS__ */
159
160	#define __STDIO_AUTO_THREADLOCK_VAR ((void)0)
161
162	#define __STDIO_AUTO_THREADLOCK(__stream) ((void)0)
163	#define __STDIO_AUTO_THREADUNLOCK(__stream) ((void)0)
164
165	#define __STDIO_SET_USER_LOCKING(__stream) ((void)0)
166
167	#define __STDIO_ALWAYS_THREADLOCK(__stream) ((void)0)
168	#define __STDIO_ALWAYS_THREADTRYLOCK(__stream) (0) /* Always succeed. */
169	#define __STDIO_ALWAYS_THREADUNLOCK(__stream) ((void)0)
170
171	#endif /* __UCLIBC_HAS_THREADS__ */
172	/**********************************************************************/
173
174	#define __STDIO_IOFBF 0 /* Fully buffered. */
175	#define __STDIO_IOLBF 1 /* Line buffered. */
176	#define __STDIO_IONBF 2 /* No buffering. */
177
178	typedef struct {
179	__off_t __pos;
180	#ifdef __STDIO_MBSTATE
181	__mbstate_t __mbstate;
182	#endif
183	#ifdef __UCLIBC_HAS_WCHAR__
184	int __mblen_pending;
185	#endif
186	} __STDIO_fpos_t;
187
188	#ifdef __UCLIBC_HAS_LFS__
189	typedef struct {
190	__off64_t __pos;
191	#ifdef __STDIO_MBSTATE
192	__mbstate_t __mbstate;
193	#endif
194	#ifdef __UCLIBC_HAS_WCHAR__
195	int __mblen_pending;
196	#endif
197	} __STDIO_fpos64_t;
198	#endif
199
200	/**********************************************************************/
201	#ifdef __UCLIBC_HAS_LFS__
202	typedef __off64_t __offmax_t; /* TODO -- rename this? */
203	#else
204	typedef __off_t __offmax_t; /* TODO -- rename this? */
205	#endif
206
207	/**********************************************************************/
208	#ifdef __UCLIBC_HAS_GLIBC_CUSTOM_STREAMS__
209
210	typedef __ssize_t __io_read_fn(void __cookie, char __buf, size_t __bufsize);
211	typedef __ssize_t __io_write_fn(void *__cookie,
212	__const char *__buf, size_t __bufsize);
213	/* NOTE: GLIBC difference!!! -- fopencookie seek function
214	* For glibc, the type of pos is always (__off64_t *) but in our case
215	* it is type (__off_t *) when the lib is built without large file support.
216	*/
217	typedef int __io_seek_fn(void __cookie, __offmax_t __pos, int __whence);
218	typedef int __io_close_fn(void *__cookie);
219
220	typedef struct {
221	__io_read_fn *read;
222	__io_write_fn *write;
223	__io_seek_fn *seek;
224	__io_close_fn *close;
225	} _IO_cookie_io_functions_t;
226
227	#if defined(_LIBC) \|\| defined(_GNU_SOURCE)
228
229	typedef __io_read_fn cookie_read_function_t;
230	typedef __io_write_fn cookie_write_function_t;
231	typedef __io_seek_fn cookie_seek_function_t;
232	typedef __io_close_fn cookie_close_function_t;
233
234	typedef _IO_cookie_io_functions_t cookie_io_functions_t;
235
236	#endif
237
238	#endif
239	/**********************************************************************/
240
241	struct __STDIO_FILE_STRUCT {
242	unsigned short __modeflags;
243	/* There could be a hole here, but modeflags is used most.*/
244	#ifdef __UCLIBC_HAS_WCHAR__
245	unsigned char __ungot_width[2]; /* 0: current (building) char; 1: scanf */
246	/* Move the following futher down to avoid problems with getc/putc
247	* macros breaking shared apps when wchar config support is changed. */
248	/* wchar_t ungot[2]; */
249	#else /* __UCLIBC_HAS_WCHAR__ */
250	unsigned char __ungot[2];
251	#endif /* __UCLIBC_HAS_WCHAR__ */
252	int __filedes;
253	#ifdef __STDIO_BUFFERS
254	unsigned char __bufstart; / pointer to buffer */
255	unsigned char __bufend; / pointer to 1 past end of buffer */
256	unsigned char *__bufpos;
257	unsigned char __bufread; / pointer to 1 past last buffered read char */
258
259	#ifdef __STDIO_GETC_MACRO
260	unsigned char __bufgetc_u; / 1 past last readable by getc_unlocked */
261	#endif /* __STDIO_GETC_MACRO */
262	#ifdef __STDIO_PUTC_MACRO
263	unsigned char __bufputc_u; / 1 past last writeable by putc_unlocked */
264	#endif /* __STDIO_PUTC_MACRO */
265
266	#endif /* __STDIO_BUFFERS */
267
268	#ifdef __STDIO_HAS_OPENLIST
269	struct __STDIO_FILE_STRUCT *__nextopen;
270	#endif
271	#ifdef __UCLIBC_HAS_GLIBC_CUSTOM_STREAMS__
272	void *__cookie;
273	_IO_cookie_io_functions_t __gcs;
274	#endif
275	#ifdef __UCLIBC_HAS_WCHAR__
276	wchar_t __ungot[2];
277	#endif
278	#ifdef __STDIO_MBSTATE
279	__mbstate_t __state;
280	#endif
281	#ifdef __UCLIBC_HAS_XLOCALE__
282	void __unused; / Placeholder for codeset binding. */
283	#endif
284	#ifdef __UCLIBC_HAS_THREADS__
285	int __user_locking;
286	pthread_mutex_t __lock;
287	#endif
288	/* Everything after this is unimplemented... and may be trashed. */
289	#if __STDIO_BUILTIN_BUF_SIZE > 0
290	unsigned char __builtinbuf[__STDIO_BUILTIN_BUF_SIZE];
291	#endif /* __STDIO_BUILTIN_BUF_SIZE > 0 */
292	};
293
294
295	/***********************************************************************/
296	/* Having ungotten characters implies the stream is reading.
297	* The scheme used here treats the least significant 2 bits of
298	* the stream's modeflags member as follows:
299	* 0 0 Not currently reading.
300	* 0 1 Reading, but no ungetc() or scanf() push back chars.
301	* 1 0 Reading with one ungetc() char (ungot[1] is 1)
302	* or one scanf() pushed back char (ungot[1] is 0).
303	* 1 1 Reading with both an ungetc() char and a scanf()
304	* pushed back char. Note that this must be the result
305	* of a scanf() push back (in ungot[0]) _followed_ by
306	* an ungetc() call (in ungot[1]).
307	*
308	* Notes:
309	* scanf() can NOT use ungetc() to push back characters.
310	* (See section 7.19.6.2 of the C9X rationale -- WG14/N897.)
311	*/
312
313	#define __MASK_READING 0x0003U /* (0x0001 \| 0x0002) */
314	#define __FLAG_READING 0x0001U
315	#define __FLAG_UNGOT 0x0002U
316	#define __FLAG_EOF 0x0004U
317	#define __FLAG_ERROR 0x0008U
318	#define __FLAG_WRITEONLY 0x0010U
319	#define __FLAG_READONLY 0x0020U /* (__FLAG_WRITEONLY << 1) */
320	#define __FLAG_WRITING 0x0040U
321	#define __FLAG_NARROW 0x0080U
322
323	#define __FLAG_FBF 0x0000U /* must be 0 */
324	#define __FLAG_LBF 0x0100U
325	#define __FLAG_NBF 0x0200U /* (__FLAG_LBF << 1) */
326	#define __MASK_BUFMODE 0x0300U /* (__FLAG_LBF\|__FLAG_NBF) */
327	#define __FLAG_APPEND 0x0400U /* fixed! == O_APPEND for linux */
328	#define __FLAG_WIDE 0x0800U
329	/* available slot 0x1000U */
330	#define __FLAG_FREEFILE 0x2000U
331	#define __FLAG_FREEBUF 0x4000U
332	#define __FLAG_LARGEFILE 0x8000U /* fixed! == 0_LARGEFILE for linux */
333
334	/* Note: In no-buffer mode, it would be possible to pack the necessary
335	* flags into one byte. Since we wouldn't be buffering and there would
336	* be no support for wchar, the only flags we would need would be:
337	* 2 bits : ungot count
338	* 2 bits : eof + error
339	* 2 bits : readonly + writeonly
340	* 1 bit : freefile
341	* 1 bit : appending
342	* So, for a very small system (< 128 files) we might have a
343	* 4-byte FILE struct of:
344	* unsigned char flags;
345	* signed char filedes;
346	* unsigned char ungot[2];
347	*/
348	/**********************************************************************
349	* PROTOTYPES OF INTERNAL FUNCTIONS
350	**********************************************************************/
351	#ifdef _LIBC
352
353	extern void _stdio_init(void);
354	extern void _stdio_term(void);
355
356	#ifdef __STDIO_HAS_OPENLIST
357
358	extern struct __STDIO_FILE_STRUCT *_stdio_openlist;
359
360	#ifdef __UCLIBC_HAS_THREADS__
361	extern pthread_mutex_t _stdio_openlist_lock;
362	extern int _stdio_openlist_delflag;
363	extern int _stdio_user_locking;
364	extern void __stdio_init_mutex(pthread_mutex_t *m);
365	#endif
366
367	#endif
368
369	#endif
370	/**********************************************************************/
371
372	#define __CLEARERR_UNLOCKED(__stream) \
373	((void)((__stream)->__modeflags &= ~(__FLAG_EOF\|__FLAG_ERROR)))
374	#define __FEOF_UNLOCKED(__stream) ((__stream)->__modeflags & __FLAG_EOF)
375	#define __FERROR_UNLOCKED(__stream) ((__stream)->__modeflags & __FLAG_ERROR)
376
377	#ifdef __UCLIBC_HAS_THREADS__
378	# define __CLEARERR(__stream) (clearerr)(__stream)
379	# define __FERROR(__stream) (ferror)(__stream)
380	# define __FEOF(__stream) (feof)(__stream)
381	#else
382	# define __CLEARERR(__stream) __CLEARERR_UNLOCKED(__stream)
383	# define __FERROR(__stream) __FERROR_UNLOCKED(__stream)
384	# define __FEOF(__stream) __FEOF_UNLOCKED(__stream)
385	#endif
386
387	extern int __fgetc_unlocked(FILE *__stream);
388	extern int __fputc_unlocked(int __c, FILE *__stream);
389
390	/* First define the default definitions. They overriden below as necessary. */
391	#define __FGETC_UNLOCKED(__stream) (__fgetc_unlocked)((__stream))
392	#define __FGETC(__stream) (fgetc)((__stream))
393	#define __GETC_UNLOCKED_MACRO(__stream) (__fgetc_unlocked)((__stream))
394	#define __GETC_UNLOCKED(__stream) (__fgetc_unlocked)((__stream))
395	#define __GETC(__stream) (fgetc)((__stream))
396
397	#define __FPUTC_UNLOCKED(__c, __stream) (__fputc_unlocked)((__c),(__stream))
398	#define __FPUTC(__c, __stream) (fputc)((__c),(__stream))
399	#define __PUTC_UNLOCKED_MACRO(__c, __stream) (__fputc_unlocked)((__c),(__stream))
400	#define __PUTC_UNLOCKED(__c, __stream) (__fputc_unlocked)((__c),(__stream))
401	#define __PUTC(__c, __stream) (fputc)((__c),(__stream))
402
403
404	#ifdef __STDIO_GETC_MACRO
405
406	extern FILE __stdin; / For getchar() macro. */
407
408	# undef __GETC_UNLOCKED_MACRO
409	# define __GETC_UNLOCKED_MACRO(__stream) \
410	( ((__stream)->__bufpos < (__stream)->__bufgetc_u) \
411	? (*(__stream)->__bufpos++) \
412	: __fgetc_unlocked(__stream) )
413
414	# if 0
415	/* Classic macro approach. getc{_unlocked} can have side effects. */
416	# undef __GETC_UNLOCKED
417	# define __GETC_UNLOCKED(__stream) __GETC_UNLOCKED_MACRO((__stream))
418	# ifndef __UCLIBC_HAS_THREADS__
419	# undef __GETC
420	# define __GETC(__stream) __GETC_UNLOCKED_MACRO((__stream))
421	# endif
422
423	# else
424	/* Using gcc extension for safety and additional inlining. */
425	# undef __FGETC_UNLOCKED
426	# define __FGETC_UNLOCKED(__stream) \
427	(__extension__ ({ \
428	FILE *__S = (__stream); \
429	__GETC_UNLOCKED_MACRO(__S); \
430	}) )
431
432	# undef __GETC_UNLOCKED
433	# define __GETC_UNLOCKED(__stream) __FGETC_UNLOCKED((__stream))
434
435	# ifdef __UCLIBC_HAS_THREADS__
436	# undef __FGETC
437	# define __FGETC(__stream) \
438	(__extension__ ({ \
439	FILE *__S = (__stream); \
440	((__S->__user_locking ) \
441	? __GETC_UNLOCKED_MACRO(__S) \
442	: (fgetc)(__S)); \
443	}) )
444
445	# undef __GETC
446	# define __GETC(__stream) __FGETC((__stream))
447
448	# else
449
450	# undef __FGETC
451	# define __FGETC(__stream) __FGETC_UNLOCKED((__stream))
452	# undef __GETC
453	# define __GETC(__stream) __FGETC_UNLOCKED((__stream))
454
455	# endif
456	# endif
457
458	#else
459
460	#endif /* __STDIO_GETC_MACRO */
461
462
463	#ifdef __STDIO_PUTC_MACRO
464
465	extern FILE __stdout; / For putchar() macro. */
466
467	# undef __PUTC_UNLOCKED_MACRO
468	# define __PUTC_UNLOCKED_MACRO(__c, __stream) \
469	( ((__stream)->__bufpos < (__stream)->__bufputc_u) \
470	? (*(__stream)->__bufpos++) = (__c) \
471	: __fputc_unlocked((__c),(__stream)) )
472
473	# if 0
474	/* Classic macro approach. putc{_unlocked} can have side effects.*/
475	# undef __PUTC_UNLOCKED
476	# define __PUTC_UNLOCKED(__c, __stream) \
477	__PUTC_UNLOCKED_MACRO((__c), (__stream))
478	# ifndef __UCLIBC_HAS_THREADS__
479	# undef __PUTC
480	# define __PUTC(__c, __stream) __PUTC_UNLOCKED_MACRO((__c), (__stream))
481	# endif
482
483	# else
484	/* Using gcc extension for safety and additional inlining. */
485
486	# undef __FPUTC_UNLOCKED
487	# define __FPUTC_UNLOCKED(__c, __stream) \
488	(__extension__ ({ \
489	FILE *__S = (__stream); \
490	__PUTC_UNLOCKED_MACRO((__c),__S); \
491	}) )
492
493	# undef __PUTC_UNLOCKED
494	# define __PUTC_UNLOCKED(__c, __stream) __FPUTC_UNLOCKED((__c), (__stream))
495
496	# ifdef __UCLIBC_HAS_THREADS__
497	# undef __FPUTC
498	# define __FPUTC(__c, __stream) \
499	(__extension__ ({ \
500	FILE *__S = (__stream); \
501	((__S->__user_locking) \
502	? __PUTC_UNLOCKED_MACRO((__c),__S) \
503	: (fputc)((__c),__S)); \
504	}) )
505
506	# undef __PUTC
507	# define __PUTC(__c, __stream) __FPUTC((__c), (__stream))
508
509	# else
510
511	# undef __FPUTC
512	# define __FPUTC(__c, __stream) __FPUTC_UNLOCKED((__c),(__stream))
513	# undef __PUTC
514	# define __PUTC(__c, __stream) __FPUTC_UNLOCKED((__c),(__stream))
515
516	# endif
517	# endif
518
519	#endif /* __STDIO_PUTC_MACRO */

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