sfhdr.h

su 的源代码库

/* Copyright (c) Colorado School of Mines, 2006.*/
/* All rights reserved.                       */

#ifndef _SFHDR_H
#define _SFHDR_H	1
#if !defined(_BLD_sfio) && !defined(_BLD_stdio)
#define _BLD_sfio	1
#endif

/*	Internal definitions for sfio.
**	Written by Kiem-Phong Vo
*/

#define _next		next
#define _endw		endw
#define _endr		endr
#define _endb		endb
#define _push		push
#define _flags		flags
#define _file		file
#define _data		data
#define _size		size
#define _val		val

#include	"FEATURE/sfio"
#include	"FEATURE/mmap"

/* define va_list, etc. before including sfio_t.h (sfio.h) */
#if !_PACKAGE_ast

/* some systems don't know large files */
#if defined(_NO_LARGEFILE64_SOURCE) || _mips == 2 /* || __hppa */
#undef _NO_LARGEFILE64_SOURCE
#define _NO_LARGEFILE64_SOURCE	1
#undef	_LARGEFILE64_SOURCE
#undef	_LARGEFILE_SOURCE
#endif

#if !_NO_LARGEFILE64_SOURCE && _typ_off64_t && _lib_lseek64 && _lib_stat64
#undef	_LARGEFILE64_SOURCE
#undef	_LARGEFILE_SOURCE
#undef	_FILE_OFFSET_BITS
#define _LARGEFILE64_SOURCE	1	/* enabling the *64 stuff */
#define _LARGEFILE_SOURCE	1	
#endif

#if _hdr_stdarg
#include	<stdarg.h>
#else
#include	<varargs.h>
#endif
#include	"FEATURE/common"
#if !__STD_C
#define const	
#endif
#endif /* !_PACKAGE_ast */

#include	"sfio_t.h"

/* note that the macro vt_threaded has effect on vthread.h */
#include	<vthread.h>

/* file system info */
#if _PACKAGE_ast

#include	<ast.h>
#include	<ast_time.h>
#include	<ast_tty.h>
#include	<ls.h>

/* ast always provides multibyte handling */
#undef _hdr_wchar
#undef _lib_mbrtowc
#undef _lib_wcrtomb
#define _hdr_wchar	1
#define _lib_mbrtowc	1
#define _lib_wcrtomb	1

#if _mem_st_blksize_stat
#define _stat_blksize	1
#endif

#if _lib_localeconv && _hdr_locale
#define _lib_locale	1
#endif

#define sfoff_t		off_t
#define sfstat_t	struct stat
#define sysclosef	close
#define syscreatf	creat
#define sysdupf		dup
#define sysfcntlf	fcntl
#define sysfstatf	fstat
#define sysftruncatef	ftruncate
#define syslseekf	lseek
#define sysmmapf	mmap
#define sysmunmapf	munmap
#define sysopenf	open
#define syspipef	pipe
#define sysreadf	read
#define sysremovef	remove
#define sysstatf	stat
#define syswritef	write

#else /*!_PACKAGE_ast*/

/* when building the binary compatibility package, a number of header files
   are not needed and they may get in the way so we remove them here.
*/
#if _SFBINARY_H
#undef  _hdr_time
#undef  _sys_time
#undef  _sys_stat
#undef  _hdr_stat
#undef  _hdr_filio
#undef  _sys_filio
#undef  _lib_poll
#undef  _stream_peek
#undef  _socket_peek
#undef  _hdr_vfork
#undef  _sys_vfork
#undef  _lib_vfork
#undef  _hdr_values
#undef  _hdr_math
#undef  _sys_mman
#undef  _hdr_mman
#undef  _sys_ioctl
#endif

#if _hdr_stdlib
#include	<stdlib.h>
#endif

#if _hdr_string
#include	<string.h>
#endif

#if _hdr_time
#include	<time.h>
#endif
#if _sys_time
#include	<sys/time.h>
#endif

#if _sys_stat
#include	<sys/stat.h>
#else
#if _hdr_stat
#include	<stat.h>
#ifndef _sys_stat
#define	_sys_stat	1
#endif
#endif
#endif /*_sys_stat*/

#ifndef _sys_stat
#define _sys_stat	0
#endif

#include	<fcntl.h>

#ifndef F_SETFD
#ifndef FIOCLEX
#if _hdr_filio
#include	<filio.h>
#else
#if _sys_filio
#include	<sys/filio.h>
#endif /*_sys_filio*/
#endif /*_hdr_filio*/
#endif /*_FIOCLEX*/
#endif /*F_SETFD*/

#if _hdr_unistd
#include	<unistd.h>
#endif

#if !_LARGEFILE64_SOURCE	/* turn off the *64 stuff */
#undef	_typ_off64_t
#undef	_typ_struct_stat64
#undef	_lib_creat64
#undef	_lib_open64
#undef	_lib_close64
#undef	_lib_stat64
#undef	_lib_fstat64
#undef	_lib_ftruncate64
#undef	_lib_lseek64
#undef	_lib_mmap64
#undef	_lib_munmap64
#endif /*!_LARGEFILE64_SOURCE */

/* see if we can use memory mapping for io */
#if _LARGEFILE64_SOURCE && !_lib_mmap64
#undef _mmap_worthy
#endif
#if !_mmap_worthy
#undef _hdr_mman
#undef _sys_mman
#endif
#if _hdr_mman
#include	<mman.h>
#endif
#if _sys_mman
#include	<sys/mman.h>
#endif

/* standardize system calls and types dealing with files */
#if _typ_off64_t
#define sfoff_t		off64_t
#else
#define sfoff_t		off_t
#endif
#if _typ_struct_stat64
#define sfstat_t	struct stat64
#else
#define sfstat_t	struct stat
#endif
#if _lib_lseek64
#define syslseekf	lseek64
#else
#define syslseekf	lseek
#endif
#if _lib_stat64
#define sysstatf	stat64
#else
#define sysstatf	stat
#endif
#if _lib_fstat64
#define sysfstatf	fstat64
#else
#define sysfstatf	fstat
#endif
#if _lib_mmap64
#define sysmmapf	mmap64
#else
#define sysmmapf	mmap
#endif
#if _lib_munmap64
#define sysmunmapf	munmap64
#else
#define sysmunmapf	munmap
#endif
#if _lib_open64
#define sysopenf	open64
#else
#define sysopenf	open
#endif
#if _lib_creat64
#define syscreatf	creat64
#else
#define syscreatf	creat
#endif
#if _lib_close64
#define sysclosef	close64
#else
#define sysclosef	close
#endif
#if _lib_ftruncate64
#undef _lib_ftruncate
#define _lib_ftruncate	1
#define sysftruncatef	ftruncate64
#endif
#if !_lib_ftruncate64 && _lib_ftruncate
#define sysftruncatef	ftruncate
#endif
#if _lib_remove
#define sysremovef	remove
#else
#define sysremovef	unlink
#endif

#define sysreadf	read
#define syswritef	write
#define syspipef	pipe
#define sysdupf		dup
#define sysfcntlf	fcntl

#endif /*_PACKAGE_ast*/

#if !_mmap_worthy
#undef MAP_TYPE
#endif

#include	"FEATURE/float"

#include	<errno.h>
#include	<ctype.h>

/* deal with multi-byte character and string conversions */
#if _PACKAGE_ast

#include	<wchar.h>

#define _has_multibyte		1

#define SFMBMAX			mbmax()
#define SFMBCPY(to,fr)		memcpy((to), (fr), sizeof(mbstate_t))
#define SFMBCLR(mb)		memset((mb), 0,  sizeof(mbstate_t))
#define SFMBSET(lhs,v)		(lhs = (v))
#define SFMBLEN(s,mb)		mbsize(s)
#define SFMBDCL(ms)		mbstate_t ms;

#else

#if _hdr_wchar && _typ_mbstate_t && _lib_wcrtomb && _lib_mbrtowc
#define _has_multibyte		1	/* Xopen-compliant	*/
#include	<wchar.h>
#define SFMBCPY(to,fr)		memcpy((to), (fr), sizeof(mbstate_t))
#define SFMBCLR(mb)		memset((mb), 0,  sizeof(mbstate_t))
#define SFMBSET(lhs,v)		(lhs = (v))
#define SFMBDCL(mb)		mbstate_t mb;
#define SFMBLEN(s,mb)		mbrtowc(NIL(wchar_t*), (s), SFMBMAX, (mb) )
#endif /*_hdr_wchar && _typ_mbstate_t && _lib_wcrtomb && _lib_mbrtowc*/

#if !_has_multibyte && _hdr_wchar && _lib_mbtowc && _lib_wctomb
#define _has_multibyte		2	/* no shift states	*/
#include	<wchar.h>
#undef mbrtowc
#define mbrtowc(wp,s,n,mb)	mbtowc(wp, s, n)
#undef wcrtomb
#define wcrtomb(s,wc,mb)	wctomb(s, wc)
#define SFMBCPY(to,fr)
#define SFMBCLR(mb)
#define SFMBSET(lhs,v)
#define SFMBDCL(mb)
#define SFMBLEN(s,mb)		mbrtowc(NIL(wchar_t*), (s), SFMBMAX, (mb) )
#endif /*!_has_multibyte && _hdr_wchar && _lib_mbtowc && _lib_wctomb*/

#ifdef MB_CUR_MAX
#define SFMBMAX			MB_CUR_MAX
#else
#define SFMBMAX			sizeof(Sflong_t)
#endif

#endif /* _PACKAGE_ast */

#if !_has_multibyte
#define _has_multibyte		0	/* no multibyte support	*/
#define SFMBCPY(to,fr)
#define SFMBCLR(mb)
#define SFMBSET(lhs,v)
#define SFMBLEN(s,mb)		(*(s) ? 1 : 0)
#define SFMBDCL(mb)
#endif /* _has_multibyte */

#if vt_threaded

/* initialization */
#define SFONCE()	(_Sfdone ? 0 : vtonce(_Sfonce,_Sfoncef))

/* to lock/unlock a stream on entering and returning from some function */
#define SFMTXLOCK(f)	 (((f)->flags&SF_MTSAFE) ? sfmutex(f,SFMTX_LOCK) : 0)
#define SFMTXUNLOCK(f)	 (((f)->flags&SF_MTSAFE) ? sfmutex(f,SFMTX_UNLOCK) : 0)
#define SFMTXSTART(f,v)  { if(!f || SFMTXLOCK(f) != 0) return(v); }
#define SFMTXRETURN(f,v) { SFMTXUNLOCK(f); return(v); }

/* start and end critical region for a pool */
#define POOLMTXLOCK(p)		( vtmtxlock(&(p)->mutex) )
#define POOLMTXUNLOCK(p)	( vtmtxunlock(&(p)->mutex) )
#define POOLMTXSTART(p)		{ POOLMTXLOCK(p); }
#define POOLMTXRETURN(p,v)	{ POOLMTXUNLOCK(p); return(v); }

#else /*!vt_threaded*/

#undef SF_MTSAFE /* no need to worry about thread-safety */
#define SF_MTSAFE		0

#define SFONCE()		/*(0)*/

#define SFMTXLOCK(f)		/*(0)*/
#define SFMTXUNLOCK(f)		/*(0)*/
#define SFMTXSTART(f,v)		{ if(!f) return(v); }
#define SFMTXRETURN(f,v)	{ return(v); }

#define POOLMTXLOCK(p)
#define POOLMTXUNLOCK(p)
#define POOLMTXSTART(p)
#define POOLMTXRETURN(p,v)	{ return(v); }

#endif /*vt_threaded*/


/* functions for polling readiness of streams */
#if _lib_select
#undef _lib_poll
#else
#if _lib_poll_fd_1 || _lib_poll_fd_2
#define _lib_poll	1
#endif
#endif /*_lib_select_*/

#if _lib_poll
#include	<poll.h>

#if _lib_poll_fd_1
#define SFPOLL(pfd,n,tm)	poll((pfd),(ulong)(n),(tm))
#else
#define SFPOLL(pfd,n,tm)	poll((ulong)(n),(pfd),(tm))
#endif
#endif /*_lib_poll*/

#if _stream_peek
#include	<stropts.h>
#endif

#if _socket_peek
#include	<sys/socket.h>
#endif

/* to test for executable access mode of a file */