520 lines
16 KiB
C
520 lines
16 KiB
C
/* Copyright (C) 2002-2004 Manuel Novoa III <mjn3@codepoet.org>
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*
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* GNU Library General Public License (LGPL) version 2 or later.
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*
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* Dedicated to Toni. See uClibc/DEDICATION.mjn3 for details.
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*/
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#ifndef _STDIO_H
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#error Always include <stdio.h> rather than <bits/uClibc_stdio.h>
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#endif
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/**********************************************************************/
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#define __STDIO_BUFFERS
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/* ANSI/ISO mandate at least 256. */
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#if defined(__UCLIBC_HAS_STDIO_BUFSIZ_NONE__)
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/* Fake this because some apps use stdio.h BUFSIZ. */
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#define __STDIO_BUFSIZ 256
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#undef __STDIO_BUFFERS
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#elif defined(__UCLIBC_HAS_STDIO_BUFSIZ_256__)
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#define __STDIO_BUFSIZ 256
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#elif defined(__UCLIBC_HAS_STDIO_BUFSIZ_512__)
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#define __STDIO_BUFSIZ 512
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#elif defined(__UCLIBC_HAS_STDIO_BUFSIZ_1024__)
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#define __STDIO_BUFSIZ 1024
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#elif defined(__UCLIBC_HAS_STDIO_BUFSIZ_2048__)
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#define __STDIO_BUFSIZ 2048
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#elif defined(__UCLIBC_HAS_STDIO_BUFSIZ_4096__)
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#define __STDIO_BUFSIZ 4096
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#elif defined(__UCLIBC_HAS_STDIO_BUFSIZ_8192__)
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#define __STDIO_BUFSIZ 8192
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#else
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#error config seems to be out of sync regarding bufsiz options
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#endif
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#ifdef __UCLIBC_HAS_STDIO_BUFSIZ_NONE__
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#define __STDIO_BUILTIN_BUF_SIZE 0
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#else /* __UCLIBC_HAS_STDIO_BUFSIZ_NONE__ */
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#if defined(__UCLIBC_HAS_STDIO_BUILTIN_BUFFER_NONE__)
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#define __STDIO_BUILTIN_BUF_SIZE 0
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#elif defined(__UCLIBC_HAS_STDIO_BUILTIN_BUFFER_4__)
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#define __STDIO_BUILTIN_BUF_SIZE 4
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#elif defined(__UCLIBC_HAS_STDIO_BUILTIN_BUFFER_8__)
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#define __STDIO_BUILTIN_BUF_SIZE 8
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#else
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#error config seems to be out of sync regarding builtin buffer size
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#endif
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#endif
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#if defined(__STDIO_BUFFERS) || defined(__UCLIBC_HAS_GLIBC_CUSTOM_STREAMS__) || defined(__UCLIBC_HAS_THREADS__)
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#define __STDIO_HAS_OPENLIST 1
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#else
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#undef __STDIO_HAS_OPENLIST
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#endif
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/**********************************************************************/
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/* Make sure defines related to large files are consistent. */
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#ifdef _LIBC
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#ifdef __UCLIBC_HAS_LFS__
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#undef __USE_LARGEFILE
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#undef __USE_LARGEFILE64
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#undef __USE_FILE_OFFSET64
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/* If we're actually building uClibc with large file support, only define... */
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#define __USE_LARGEFILE64 1
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#endif /* __UCLIBC_HAS_LFS__ */
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#else /* not _LIBC */
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#ifndef __UCLIBC_HAS_LFS__
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#if defined(__LARGEFILE64_SOURCE) || defined(__USE_LARGEFILE64) || defined(__USE_FILE_OFFSET64)
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#error Sorry... uClibc was built without large file support!
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#endif
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#endif /* __UCLIBC_HAS_LFS__ */
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#endif /* _LIBC */
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/**********************************************************************/
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#ifdef __UCLIBC_HAS_WCHAR__
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#define __need_wchar_t
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#include <stddef.h>
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/* Note: we don't really need mbstate for 8-bit locales. We do for UTF-8.
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* For now, always use it. */
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#define __STDIO_MBSTATE
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#define __need_mbstate_t
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#include <wchar.h>
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#endif
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/**********************************************************************/
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/* Currently unimplemented/untested */
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/* #define __STDIO_FLEXIBLE_SETVBUF */
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#ifdef __UCLIBC_HAS_STDIO_GETC_MACRO__
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#define __STDIO_GETC_MACRO
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#endif
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#ifdef __UCLIBC_HAS_STDIO_PUTC_MACRO__
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#define __STDIO_PUTC_MACRO
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#endif
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/* These are consistency checks on the different options */
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#ifndef __STDIO_BUFFERS
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#undef __STDIO_GETC_MACRO
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#undef __STDIO_PUTC_MACRO
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#endif
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#ifdef __BCC__
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#undef __UCLIBC_HAS_LFS__
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#endif
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#ifndef __UCLIBC_HAS_LFS__
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#undef __UCLIBC_HAS_FOPEN_LARGEFILE_MODE__
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#endif
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/**********************************************************************/
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#ifdef __UCLIBC_HAS_THREADS__
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/* Need this for pthread_mutex_t. */
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#include <bits/pthreadtypes.h>
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/* user_locking
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* 0 : do auto locking/unlocking
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* 1 : user does locking/unlocking
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* 2 : initial state prior to thread initialization
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* with no auto locking/unlocking
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*
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* When threading is initialized, walk the stdio open stream list
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* and do "if (user_locking == 2) user_locking = 0;".
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*
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* This way, we avoid calling the weak lock/unlock functions.
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*/
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#define __STDIO_AUTO_THREADLOCK_VAR int __infunc_user_locking
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#define __STDIO_AUTO_THREADLOCK(__stream) \
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if ((__infunc_user_locking = (__stream)->__user_locking) == 0) { \
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__pthread_mutex_lock(&(__stream)->__lock); \
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}
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#define __STDIO_AUTO_THREADUNLOCK(__stream) \
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if (__infunc_user_locking == 0) { \
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__pthread_mutex_unlock(&(__stream)->__lock); \
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}
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#define __STDIO_SET_USER_LOCKING(__stream) ((__stream)->__user_locking = 1)
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#define __STDIO_ALWAYS_THREADLOCK(__stream) \
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__pthread_mutex_lock(&(__stream)->__lock)
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#define __STDIO_ALWAYS_THREADTRYLOCK(__stream) \
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__pthread_mutex_trylock(&(__stream)->__lock)
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#define __STDIO_ALWAYS_THREADUNLOCK(__stream) \
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__pthread_mutex_unlock(&(__stream)->__lock)
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#else /* __UCLIBC_HAS_THREADS__ */
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#define __STDIO_AUTO_THREADLOCK_VAR ((void)0)
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#define __STDIO_AUTO_THREADLOCK(__stream) ((void)0)
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#define __STDIO_AUTO_THREADUNLOCK(__stream) ((void)0)
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#define __STDIO_SET_USER_LOCKING(__stream) ((void)0)
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#define __STDIO_ALWAYS_THREADLOCK(__stream) ((void)0)
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#define __STDIO_ALWAYS_THREADTRYLOCK(__stream) (0) /* Always succeed. */
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#define __STDIO_ALWAYS_THREADUNLOCK(__stream) ((void)0)
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#endif /* __UCLIBC_HAS_THREADS__ */
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/**********************************************************************/
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#define __STDIO_IOFBF 0 /* Fully buffered. */
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#define __STDIO_IOLBF 1 /* Line buffered. */
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#define __STDIO_IONBF 2 /* No buffering. */
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typedef struct {
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__off_t __pos;
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#ifdef __STDIO_MBSTATE
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__mbstate_t __mbstate;
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#endif
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#ifdef __UCLIBC_HAS_WCHAR__
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int __mblen_pending;
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#endif
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} __STDIO_fpos_t;
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#ifdef __UCLIBC_HAS_LFS__
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typedef struct {
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__off64_t __pos;
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#ifdef __STDIO_MBSTATE
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__mbstate_t __mbstate;
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#endif
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#ifdef __UCLIBC_HAS_WCHAR__
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int __mblen_pending;
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#endif
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} __STDIO_fpos64_t;
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#endif
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/**********************************************************************/
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#ifdef __UCLIBC_HAS_LFS__
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typedef __off64_t __offmax_t; /* TODO -- rename this? */
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#else
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typedef __off_t __offmax_t; /* TODO -- rename this? */
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#endif
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/**********************************************************************/
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#ifdef __UCLIBC_HAS_GLIBC_CUSTOM_STREAMS__
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typedef __ssize_t __io_read_fn(void *__cookie, char *__buf, size_t __bufsize);
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typedef __ssize_t __io_write_fn(void *__cookie,
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__const char *__buf, size_t __bufsize);
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/* NOTE: GLIBC difference!!! -- fopencookie seek function
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* For glibc, the type of pos is always (__off64_t *) but in our case
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* it is type (__off_t *) when the lib is built without large file support.
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*/
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typedef int __io_seek_fn(void *__cookie, __offmax_t *__pos, int __whence);
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typedef int __io_close_fn(void *__cookie);
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typedef struct {
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__io_read_fn *read;
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__io_write_fn *write;
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__io_seek_fn *seek;
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__io_close_fn *close;
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} _IO_cookie_io_functions_t;
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#if defined(_LIBC) || defined(_GNU_SOURCE)
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typedef __io_read_fn cookie_read_function_t;
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typedef __io_write_fn cookie_write_function_t;
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typedef __io_seek_fn cookie_seek_function_t;
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typedef __io_close_fn cookie_close_function_t;
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typedef _IO_cookie_io_functions_t cookie_io_functions_t;
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#endif
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#endif
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/**********************************************************************/
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struct __STDIO_FILE_STRUCT {
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unsigned short __modeflags;
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/* There could be a hole here, but modeflags is used most.*/
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#ifdef __UCLIBC_HAS_WCHAR__
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unsigned char __ungot_width[2]; /* 0: current (building) char; 1: scanf */
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/* Move the following futher down to avoid problems with getc/putc
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* macros breaking shared apps when wchar config support is changed. */
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/* wchar_t ungot[2]; */
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#else /* __UCLIBC_HAS_WCHAR__ */
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unsigned char __ungot[2];
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#endif /* __UCLIBC_HAS_WCHAR__ */
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int __filedes;
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#ifdef __STDIO_BUFFERS
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unsigned char *__bufstart; /* pointer to buffer */
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unsigned char *__bufend; /* pointer to 1 past end of buffer */
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unsigned char *__bufpos;
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unsigned char *__bufread; /* pointer to 1 past last buffered read char */
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#ifdef __STDIO_GETC_MACRO
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unsigned char *__bufgetc_u; /* 1 past last readable by getc_unlocked */
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#endif /* __STDIO_GETC_MACRO */
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#ifdef __STDIO_PUTC_MACRO
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unsigned char *__bufputc_u; /* 1 past last writeable by putc_unlocked */
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#endif /* __STDIO_PUTC_MACRO */
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#endif /* __STDIO_BUFFERS */
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#ifdef __STDIO_HAS_OPENLIST
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struct __STDIO_FILE_STRUCT *__nextopen;
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#endif
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#ifdef __UCLIBC_HAS_GLIBC_CUSTOM_STREAMS__
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void *__cookie;
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_IO_cookie_io_functions_t __gcs;
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#endif
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#ifdef __UCLIBC_HAS_WCHAR__
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wchar_t __ungot[2];
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#endif
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#ifdef __STDIO_MBSTATE
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__mbstate_t __state;
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#endif
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#ifdef __UCLIBC_HAS_XLOCALE__
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void *__unused; /* Placeholder for codeset binding. */
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#endif
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#ifdef __UCLIBC_HAS_THREADS__
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int __user_locking;
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pthread_mutex_t __lock;
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#endif
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/* Everything after this is unimplemented... and may be trashed. */
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#if __STDIO_BUILTIN_BUF_SIZE > 0
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unsigned char __builtinbuf[__STDIO_BUILTIN_BUF_SIZE];
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#endif /* __STDIO_BUILTIN_BUF_SIZE > 0 */
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};
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/***********************************************************************/
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/* Having ungotten characters implies the stream is reading.
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* The scheme used here treats the least significant 2 bits of
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* the stream's modeflags member as follows:
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* 0 0 Not currently reading.
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* 0 1 Reading, but no ungetc() or scanf() push back chars.
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* 1 0 Reading with one ungetc() char (ungot[1] is 1)
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* or one scanf() pushed back char (ungot[1] is 0).
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* 1 1 Reading with both an ungetc() char and a scanf()
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* pushed back char. Note that this must be the result
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* of a scanf() push back (in ungot[0]) _followed_ by
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* an ungetc() call (in ungot[1]).
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*
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* Notes:
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* scanf() can NOT use ungetc() to push back characters.
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* (See section 7.19.6.2 of the C9X rationale -- WG14/N897.)
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*/
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#define __MASK_READING 0x0003U /* (0x0001 | 0x0002) */
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#define __FLAG_READING 0x0001U
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#define __FLAG_UNGOT 0x0002U
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#define __FLAG_EOF 0x0004U
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#define __FLAG_ERROR 0x0008U
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#define __FLAG_WRITEONLY 0x0010U
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#define __FLAG_READONLY 0x0020U /* (__FLAG_WRITEONLY << 1) */
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#define __FLAG_WRITING 0x0040U
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#define __FLAG_NARROW 0x0080U
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#define __FLAG_FBF 0x0000U /* must be 0 */
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#define __FLAG_LBF 0x0100U
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#define __FLAG_NBF 0x0200U /* (__FLAG_LBF << 1) */
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#define __MASK_BUFMODE 0x0300U /* (__FLAG_LBF|__FLAG_NBF) */
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#define __FLAG_APPEND 0x0400U /* fixed! == O_APPEND for linux */
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#define __FLAG_WIDE 0x0800U
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/* available slot 0x1000U */
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#define __FLAG_FREEFILE 0x2000U
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#define __FLAG_FREEBUF 0x4000U
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#define __FLAG_LARGEFILE 0x8000U /* fixed! == 0_LARGEFILE for linux */
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/* Note: In no-buffer mode, it would be possible to pack the necessary
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* flags into one byte. Since we wouldn't be buffering and there would
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* be no support for wchar, the only flags we would need would be:
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* 2 bits : ungot count
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* 2 bits : eof + error
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* 2 bits : readonly + writeonly
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* 1 bit : freefile
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* 1 bit : appending
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* So, for a very small system (< 128 files) we might have a
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* 4-byte FILE struct of:
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* unsigned char flags;
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* signed char filedes;
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* unsigned char ungot[2];
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*/
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/**********************************************************************
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* PROTOTYPES OF INTERNAL FUNCTIONS
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**********************************************************************/
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#ifdef _LIBC
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extern void _stdio_init(void);
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extern void _stdio_term(void);
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#ifdef __STDIO_HAS_OPENLIST
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extern struct __STDIO_FILE_STRUCT *_stdio_openlist;
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#ifdef __UCLIBC_HAS_THREADS__
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extern pthread_mutex_t _stdio_openlist_lock;
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extern int _stdio_openlist_delflag;
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extern int _stdio_user_locking;
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extern void __stdio_init_mutex(pthread_mutex_t *m);
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#endif
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#endif
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#endif
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/**********************************************************************/
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#define __CLEARERR_UNLOCKED(__stream) \
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((void)((__stream)->__modeflags &= ~(__FLAG_EOF|__FLAG_ERROR)))
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#define __FEOF_UNLOCKED(__stream) ((__stream)->__modeflags & __FLAG_EOF)
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#define __FERROR_UNLOCKED(__stream) ((__stream)->__modeflags & __FLAG_ERROR)
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#ifdef __UCLIBC_HAS_THREADS__
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# define __CLEARERR(__stream) (clearerr)(__stream)
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# define __FERROR(__stream) (ferror)(__stream)
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# define __FEOF(__stream) (feof)(__stream)
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#else
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# define __CLEARERR(__stream) __CLEARERR_UNLOCKED(__stream)
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# define __FERROR(__stream) __FERROR_UNLOCKED(__stream)
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# define __FEOF(__stream) __FEOF_UNLOCKED(__stream)
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#endif
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extern int __fgetc_unlocked(FILE *__stream);
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extern int __fputc_unlocked(int __c, FILE *__stream);
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/* First define the default definitions. They overriden below as necessary. */
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#define __FGETC_UNLOCKED(__stream) (__fgetc_unlocked)((__stream))
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#define __FGETC(__stream) (fgetc)((__stream))
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#define __GETC_UNLOCKED_MACRO(__stream) (__fgetc_unlocked)((__stream))
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#define __GETC_UNLOCKED(__stream) (__fgetc_unlocked)((__stream))
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#define __GETC(__stream) (fgetc)((__stream))
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#define __FPUTC_UNLOCKED(__c, __stream) (__fputc_unlocked)((__c),(__stream))
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#define __FPUTC(__c, __stream) (fputc)((__c),(__stream))
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#define __PUTC_UNLOCKED_MACRO(__c, __stream) (__fputc_unlocked)((__c),(__stream))
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#define __PUTC_UNLOCKED(__c, __stream) (__fputc_unlocked)((__c),(__stream))
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#define __PUTC(__c, __stream) (fputc)((__c),(__stream))
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#ifdef __STDIO_GETC_MACRO
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extern FILE *__stdin; /* For getchar() macro. */
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# undef __GETC_UNLOCKED_MACRO
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# define __GETC_UNLOCKED_MACRO(__stream) \
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( ((__stream)->__bufpos < (__stream)->__bufgetc_u) \
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? (*(__stream)->__bufpos++) \
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: __fgetc_unlocked(__stream) )
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# if 0
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/* Classic macro approach. getc{_unlocked} can have side effects. */
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# undef __GETC_UNLOCKED
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# define __GETC_UNLOCKED(__stream) __GETC_UNLOCKED_MACRO((__stream))
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# ifndef __UCLIBC_HAS_THREADS__
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# undef __GETC
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# define __GETC(__stream) __GETC_UNLOCKED_MACRO((__stream))
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# endif
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# else
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/* Using gcc extension for safety and additional inlining. */
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# undef __FGETC_UNLOCKED
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# define __FGETC_UNLOCKED(__stream) \
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(__extension__ ({ \
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FILE *__S = (__stream); \
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__GETC_UNLOCKED_MACRO(__S); \
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}) )
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# undef __GETC_UNLOCKED
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# define __GETC_UNLOCKED(__stream) __FGETC_UNLOCKED((__stream))
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# ifdef __UCLIBC_HAS_THREADS__
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# undef __FGETC
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# define __FGETC(__stream) \
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(__extension__ ({ \
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FILE *__S = (__stream); \
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((__S->__user_locking ) \
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? __GETC_UNLOCKED_MACRO(__S) \
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: (fgetc)(__S)); \
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}) )
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# undef __GETC
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# define __GETC(__stream) __FGETC((__stream))
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# else
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# undef __FGETC
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# define __FGETC(__stream) __FGETC_UNLOCKED((__stream))
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# undef __GETC
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# define __GETC(__stream) __FGETC_UNLOCKED((__stream))
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# endif
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# endif
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#else
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#endif /* __STDIO_GETC_MACRO */
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#ifdef __STDIO_PUTC_MACRO
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extern FILE *__stdout; /* For putchar() macro. */
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# undef __PUTC_UNLOCKED_MACRO
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# define __PUTC_UNLOCKED_MACRO(__c, __stream) \
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( ((__stream)->__bufpos < (__stream)->__bufputc_u) \
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? (*(__stream)->__bufpos++) = (__c) \
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|
: __fputc_unlocked((__c),(__stream)) )
|
|
|
|
# if 0
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|
/* Classic macro approach. putc{_unlocked} can have side effects.*/
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|
# undef __PUTC_UNLOCKED
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|
# define __PUTC_UNLOCKED(__c, __stream) \
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|
__PUTC_UNLOCKED_MACRO((__c), (__stream))
|
|
# ifndef __UCLIBC_HAS_THREADS__
|
|
# undef __PUTC
|
|
# define __PUTC(__c, __stream) __PUTC_UNLOCKED_MACRO((__c), (__stream))
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|
# endif
|
|
|
|
# else
|
|
/* Using gcc extension for safety and additional inlining. */
|
|
|
|
# undef __FPUTC_UNLOCKED
|
|
# define __FPUTC_UNLOCKED(__c, __stream) \
|
|
(__extension__ ({ \
|
|
FILE *__S = (__stream); \
|
|
__PUTC_UNLOCKED_MACRO((__c),__S); \
|
|
}) )
|
|
|
|
# undef __PUTC_UNLOCKED
|
|
# define __PUTC_UNLOCKED(__c, __stream) __FPUTC_UNLOCKED((__c), (__stream))
|
|
|
|
# ifdef __UCLIBC_HAS_THREADS__
|
|
# undef __FPUTC
|
|
# define __FPUTC(__c, __stream) \
|
|
(__extension__ ({ \
|
|
FILE *__S = (__stream); \
|
|
((__S->__user_locking) \
|
|
? __PUTC_UNLOCKED_MACRO((__c),__S) \
|
|
: (fputc)((__c),__S)); \
|
|
}) )
|
|
|
|
# undef __PUTC
|
|
# define __PUTC(__c, __stream) __FPUTC((__c), (__stream))
|
|
|
|
# else
|
|
|
|
# undef __FPUTC
|
|
# define __FPUTC(__c, __stream) __FPUTC_UNLOCKED((__c),(__stream))
|
|
# undef __PUTC
|
|
# define __PUTC(__c, __stream) __FPUTC_UNLOCKED((__c),(__stream))
|
|
|
|
# endif
|
|
# endif
|
|
|
|
#endif /* __STDIO_PUTC_MACRO */
|