forked from KolibriOS/kolibrios
350 lines
13 KiB
C
350 lines
13 KiB
C
/*
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* Copyright (c) 1990, 2007 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that the above copyright notice and this paragraph are
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* duplicated in all such forms and that any documentation,
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* advertising materials, and other materials related to such
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* distribution and use acknowledge that the software was developed
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* by the University of California, Berkeley. The name of the
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* University may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* %W% (UofMD/Berkeley) %G%
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*/
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/*
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* Information local to this implementation of stdio,
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* in particular, macros and private variables.
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*/
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#include <_ansi.h>
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#include <reent.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <stdio.h>
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#ifdef __SCLE
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# include <io.h>
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#endif
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/* The following define determines if the per-reent stdin, stdout and stderr
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streams are closed during _reclaim_reent(). The stdin, stdout and stderr
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streams are initialized to use file descriptors 0, 1 and 2 respectively. In
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case _STDIO_CLOSE_PER_REENT_STD_STREAMS is defined these file descriptors
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will be closed via close() provided the owner of the reent structure
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triggerd the on demand reent initilization, see CHECK_INIT(). */
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#if !defined(__rtems__) && !defined(__tirtos__)
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#define _STDIO_CLOSE_PER_REENT_STD_STREAMS
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#endif
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/* The following macros are supposed to replace calls to _flockfile/_funlockfile
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and __sfp_lock_acquire/__sfp_lock_release. In case of multi-threaded
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environments using pthreads, it's not sufficient to lock the stdio functions
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against concurrent threads accessing the same data, the locking must also be
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secured against thread cancellation.
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The below macros have to be used in pairs. The _newlib_XXX_start macro
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starts with a opening curly brace, the _newlib_XXX_end macro ends with a
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closing curly brace, so the start macro and the end macro mark the code
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start and end of a critical section. In case the code leaves the critical
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section before reaching the end of the critical section's code end, use
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the appropriate _newlib_XXX_exit macro. */
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#if !defined (__SINGLE_THREAD__) && defined (_POSIX_THREADS) \
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&& !defined (__rtems__)
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#define _STDIO_WITH_THREAD_CANCELLATION_SUPPORT
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#endif
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#if defined(__SINGLE_THREAD__) || defined(__IMPL_UNLOCKED__)
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# define _newlib_flockfile_start(_fp)
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# define _newlib_flockfile_exit(_fp)
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# define _newlib_flockfile_end(_fp)
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# define _newlib_sfp_lock_start()
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# define _newlib_sfp_lock_exit()
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# define _newlib_sfp_lock_end()
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#elif defined(_STDIO_WITH_THREAD_CANCELLATION_SUPPORT)
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#include <pthread.h>
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/* Start a stream oriented critical section: */
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# define _newlib_flockfile_start(_fp) \
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{ \
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int __oldfpcancel; \
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pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, &__oldfpcancel); \
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if (!(_fp->_flags2 & __SNLK)) \
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_flockfile (_fp)
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/* Exit from a stream oriented critical section prematurely: */
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# define _newlib_flockfile_exit(_fp) \
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if (!(_fp->_flags2 & __SNLK)) \
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_funlockfile (_fp); \
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pthread_setcancelstate (__oldfpcancel, &__oldfpcancel);
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/* End a stream oriented critical section: */
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# define _newlib_flockfile_end(_fp) \
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if (!(_fp->_flags2 & __SNLK)) \
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_funlockfile (_fp); \
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pthread_setcancelstate (__oldfpcancel, &__oldfpcancel); \
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}
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/* Start a stream list oriented critical section: */
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# define _newlib_sfp_lock_start() \
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{ \
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int __oldsfpcancel; \
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pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, &__oldsfpcancel); \
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__sfp_lock_acquire ()
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/* Exit from a stream list oriented critical section prematurely: */
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# define _newlib_sfp_lock_exit() \
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__sfp_lock_release (); \
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pthread_setcancelstate (__oldsfpcancel, &__oldsfpcancel);
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/* End a stream list oriented critical section: */
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# define _newlib_sfp_lock_end() \
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__sfp_lock_release (); \
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pthread_setcancelstate (__oldsfpcancel, &__oldsfpcancel); \
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}
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#else /* !__SINGLE_THREAD__ && !__IMPL_UNLOCKED__ && !_STDIO_WITH_THREAD_CANCELLATION_SUPPORT */
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# define _newlib_flockfile_start(_fp) \
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{ \
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if (!(_fp->_flags2 & __SNLK)) \
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_flockfile (_fp)
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# define _newlib_flockfile_exit(_fp) \
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if (!(_fp->_flags2 & __SNLK)) \
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_funlockfile(_fp); \
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# define _newlib_flockfile_end(_fp) \
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if (!(_fp->_flags2 & __SNLK)) \
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_funlockfile(_fp); \
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}
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# define _newlib_sfp_lock_start() \
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{ \
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__sfp_lock_acquire ()
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# define _newlib_sfp_lock_exit() \
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__sfp_lock_release ();
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# define _newlib_sfp_lock_end() \
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__sfp_lock_release (); \
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}
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#endif /* __SINGLE_THREAD__ || __IMPL_UNLOCKED__ */
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extern wint_t _EXFUN(__fgetwc, (struct _reent *, FILE *));
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extern wint_t _EXFUN(__fputwc, (struct _reent *, wchar_t, FILE *));
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extern u_char *_EXFUN(__sccl, (char *, u_char *fmt));
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extern int _EXFUN(__svfscanf_r,(struct _reent *,FILE *, _CONST char *,va_list));
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extern int _EXFUN(__ssvfscanf_r,(struct _reent *,FILE *, _CONST char *,va_list));
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extern int _EXFUN(__svfiscanf_r,(struct _reent *,FILE *, _CONST char *,va_list));
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extern int _EXFUN(__ssvfiscanf_r,(struct _reent *,FILE *, _CONST char *,va_list));
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extern int _EXFUN(__svfwscanf_r,(struct _reent *,FILE *, _CONST wchar_t *,va_list));
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extern int _EXFUN(__ssvfwscanf_r,(struct _reent *,FILE *, _CONST wchar_t *,va_list));
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extern int _EXFUN(__svfiwscanf_r,(struct _reent *,FILE *, _CONST wchar_t *,va_list));
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extern int _EXFUN(__ssvfiwscanf_r,(struct _reent *,FILE *, _CONST wchar_t *,va_list));
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int _EXFUN(_svfprintf_r,(struct _reent *, FILE *, const char *,
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va_list)
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_ATTRIBUTE ((__format__ (__printf__, 3, 0))));
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int _EXFUN(_svfiprintf_r,(struct _reent *, FILE *, const char *,
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va_list)
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_ATTRIBUTE ((__format__ (__printf__, 3, 0))));
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int _EXFUN(_svfwprintf_r,(struct _reent *, FILE *, const wchar_t *,
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va_list));
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int _EXFUN(_svfiwprintf_r,(struct _reent *, FILE *, const wchar_t *,
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va_list));
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extern FILE *_EXFUN(__sfp,(struct _reent *));
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extern int _EXFUN(__sflags,(struct _reent *,_CONST char*, int*));
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extern int _EXFUN(__sflush_r,(struct _reent *,FILE *));
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#ifdef _STDIO_BSD_SEMANTICS
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extern int _EXFUN(__sflushw_r,(struct _reent *,FILE *));
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#endif
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extern int _EXFUN(__srefill_r,(struct _reent *,FILE *));
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extern _READ_WRITE_RETURN_TYPE _EXFUN(__sread,(struct _reent *, void *, char *,
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_READ_WRITE_BUFSIZE_TYPE));
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extern _READ_WRITE_RETURN_TYPE _EXFUN(__seofread,(struct _reent *, void *,
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char *,
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_READ_WRITE_BUFSIZE_TYPE));
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extern _READ_WRITE_RETURN_TYPE _EXFUN(__swrite,(struct _reent *, void *,
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const char *,
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_READ_WRITE_BUFSIZE_TYPE));
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extern _fpos_t _EXFUN(__sseek,(struct _reent *, void *, _fpos_t, int));
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extern int _EXFUN(__sclose,(struct _reent *, void *));
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extern int _EXFUN(__stextmode,(int));
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extern _VOID _EXFUN(__sinit,(struct _reent *));
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extern _VOID _EXFUN(_cleanup_r,(struct _reent *));
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extern _VOID _EXFUN(__smakebuf_r,(struct _reent *, FILE *));
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extern int _EXFUN(__swhatbuf_r,(struct _reent *, FILE *, size_t *, int *));
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extern int _EXFUN(_fwalk,(struct _reent *, int (*)(FILE *)));
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extern int _EXFUN(_fwalk_reent,(struct _reent *, int (*)(struct _reent *, FILE *)));
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struct _glue * _EXFUN(__sfmoreglue,(struct _reent *,int n));
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extern int _EXFUN(__submore, (struct _reent *, FILE *));
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#ifdef __LARGE64_FILES
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extern _fpos64_t _EXFUN(__sseek64,(struct _reent *, void *, _fpos64_t, int));
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extern _READ_WRITE_RETURN_TYPE _EXFUN(__swrite64,(struct _reent *, void *,
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const char *,
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_READ_WRITE_BUFSIZE_TYPE));
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#endif
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/* Called by the main entry point fns to ensure stdio has been initialized. */
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#ifdef _REENT_SMALL
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#define CHECK_INIT(ptr, fp) \
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do \
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{ \
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struct _reent *_check_init_ptr = (ptr); \
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if ((_check_init_ptr) && !(_check_init_ptr)->__sdidinit) \
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__sinit (_check_init_ptr); \
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if ((fp) == (FILE *)&__sf_fake_stdin) \
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(fp) = _stdin_r(_check_init_ptr); \
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else if ((fp) == (FILE *)&__sf_fake_stdout) \
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(fp) = _stdout_r(_check_init_ptr); \
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else if ((fp) == (FILE *)&__sf_fake_stderr) \
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(fp) = _stderr_r(_check_init_ptr); \
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} \
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while (0)
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#else /* !_REENT_SMALL */
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#define CHECK_INIT(ptr, fp) \
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do \
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{ \
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struct _reent *_check_init_ptr = (ptr); \
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if ((_check_init_ptr) && !(_check_init_ptr)->__sdidinit) \
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__sinit (_check_init_ptr); \
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} \
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while (0)
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#endif /* !_REENT_SMALL */
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#define CHECK_STD_INIT(ptr) \
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do \
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{ \
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struct _reent *_check_init_ptr = (ptr); \
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if ((_check_init_ptr) && !(_check_init_ptr)->__sdidinit) \
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__sinit (_check_init_ptr); \
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} \
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while (0)
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/* Return true and set errno and stream error flag iff the given FILE
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cannot be written now. */
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#define cantwrite(ptr, fp) \
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((((fp)->_flags & __SWR) == 0 || (fp)->_bf._base == NULL) && \
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__swsetup_r(ptr, fp))
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/* Test whether the given stdio file has an active ungetc buffer;
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release such a buffer, without restoring ordinary unread data. */
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#define HASUB(fp) ((fp)->_ub._base != NULL)
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#define FREEUB(ptr, fp) { \
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if ((fp)->_ub._base != (fp)->_ubuf) \
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_free_r(ptr, (char *)(fp)->_ub._base); \
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(fp)->_ub._base = NULL; \
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}
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/* Test for an fgetline() buffer. */
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#define HASLB(fp) ((fp)->_lb._base != NULL)
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#define FREELB(ptr, fp) { _free_r(ptr,(char *)(fp)->_lb._base); \
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(fp)->_lb._base = NULL; }
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#ifdef _WIDE_ORIENT
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/*
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* Set the orientation for a stream. If o > 0, the stream has wide-
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* orientation. If o < 0, the stream has byte-orientation.
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*/
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#define ORIENT(fp,ori) \
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do \
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{ \
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(fp)->_flags |= __SORD; \
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if (ori > 0) \
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(fp)->_flags2 |= __SWID; \
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else \
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(fp)->_flags2 &= ~__SWID; \
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} \
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while (0)
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#else
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#define ORIENT(fp,ori)
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#endif
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/* WARNING: _dcvt is defined in the stdlib directory, not here! */
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char *_EXFUN(_dcvt,(struct _reent *, char *, double, int, int, char, int));
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char *_EXFUN(_sicvt,(char *, short, char));
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char *_EXFUN(_icvt,(char *, int, char));
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char *_EXFUN(_licvt,(char *, long, char));
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#ifdef __GNUC__
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char *_EXFUN(_llicvt,(char *, long long, char));
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#endif
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#define CVT_BUF_SIZE 128
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#define NDYNAMIC 4 /* add four more whenever necessary */
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#ifdef __SINGLE_THREAD__
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#define __sfp_lock_acquire()
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#define __sfp_lock_release()
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#define __sinit_lock_acquire()
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#define __sinit_lock_release()
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#else
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_VOID _EXFUN(__sfp_lock_acquire,(_VOID));
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_VOID _EXFUN(__sfp_lock_release,(_VOID));
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_VOID _EXFUN(__sinit_lock_acquire,(_VOID));
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_VOID _EXFUN(__sinit_lock_release,(_VOID));
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#endif
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/* Types used in positional argument support in vfprinf/vfwprintf.
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The implementation is char/wchar_t dependent but the class and state
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tables are only defined once in vfprintf.c. */
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typedef enum {
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ZERO, /* '0' */
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DIGIT, /* '1-9' */
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DOLLAR, /* '$' */
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MODFR, /* spec modifier */
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SPEC, /* format specifier */
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DOT, /* '.' */
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STAR, /* '*' */
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FLAG, /* format flag */
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OTHER, /* all other chars */
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MAX_CH_CLASS /* place-holder */
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} __CH_CLASS;
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typedef enum {
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START, /* start */
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SFLAG, /* seen a flag */
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WDIG, /* seen digits in width area */
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WIDTH, /* processed width */
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SMOD, /* seen spec modifier */
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SDOT, /* seen dot */
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VARW, /* have variable width specifier */
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VARP, /* have variable precision specifier */
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PREC, /* processed precision */
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VWDIG, /* have digits in variable width specification */
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VPDIG, /* have digits in variable precision specification */
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DONE, /* done */
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MAX_STATE, /* place-holder */
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} __STATE;
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typedef enum {
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NOOP, /* do nothing */
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NUMBER, /* build a number from digits */
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SKIPNUM, /* skip over digits */
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GETMOD, /* get and process format modifier */
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GETARG, /* get and process argument */
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GETPW, /* get variable precision or width */
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GETPWB, /* get variable precision or width and pushback fmt char */
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GETPOS, /* get positional parameter value */
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PWPOS, /* get positional parameter value for variable width or precision */
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} __ACTION;
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extern _CONST __CH_CLASS __chclass[256];
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extern _CONST __STATE __state_table[MAX_STATE][MAX_CH_CLASS];
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extern _CONST __ACTION __action_table[MAX_STATE][MAX_CH_CLASS];
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