OpenSolaris_b135/lib/libc/inc/stdiom.h
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
/*
* stdiom.h - shared guts of stdio
*/
#ifndef _STDIOM_H
#define _STDIOM_H
#pragma ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.9 */
#include <thread.h>
#include <synch.h>
#include <mtlib.h>
#include <stdarg.h>
#include "file64.h"
#include <wchar.h>
#include "mse.h"
/*
* The following flags, and the macros that manipulate them, operate upon
* the FILE structure used by stdio. If new flags are required, they should
* be created in this file. The values of the flags must be differnt from
* the currently used values. New macros should be created to use the flags
* so that the compilation mode dependencies can be isolated here.
*/
#ifdef _LP64
#define _BYTE_MODE_FLAG 0400
#define _WC_MODE_FLAG 01000
#define _IONOLOCK 02000
#define _SEEKABLE 04000 /* is it seekable? */
#define SET_IONOLOCK(iop) ((iop)->_flag |= _IONOLOCK)
#define CLEAR_IONOLOCK(iop) ((iop)->_flag &= ~_IONOLOCK)
#define GET_IONOLOCK(iop) ((iop)->_flag & _IONOLOCK)
#define SET_BYTE_MODE(iop) ((iop)->_flag |= _BYTE_MODE_FLAG)
#define CLEAR_BYTE_MODE(iop) ((iop)->_flag &= ~_BYTE_MODE_FLAG)
#define GET_BYTE_MODE(iop) ((iop)->_flag & _BYTE_MODE_FLAG)
#define SET_WC_MODE(iop) ((iop)->_flag |= _WC_MODE_FLAG)
#define CLEAR_WC_MODE(iop) ((iop)->_flag &= ~_WC_MODE_FLAG)
#define GET_WC_MODE(iop) ((iop)->_flag & _WC_MODE_FLAG)
#define GET_NO_MODE(iop) (!((iop)->_flag & \
(_BYTE_MODE_FLAG | _WC_MODE_FLAG)))
#define SET_SEEKABLE(iop) ((iop)->_flag |= _SEEKABLE)
#define CLEAR_SEEKABLE(iop) ((iop)->_flag &= ~_SEEKABLE)
#define GET_SEEKABLE(iop) ((iop)->_flag & _SEEKABLE)
#else
#define _BYTE_MODE_FLAG 0001
#define _WC_MODE_FLAG 0002
#define SET_IONOLOCK(iop) ((iop)->__ionolock = 1)
#define CLEAR_IONOLOCK(iop) ((iop)->__ionolock = 0)
#define GET_IONOLOCK(iop) ((iop)->__ionolock)
#define SET_BYTE_MODE(iop) ((iop)->__orientation |= _BYTE_MODE_FLAG)
#define CLEAR_BYTE_MODE(iop) ((iop)->__orientation &= ~_BYTE_MODE_FLAG)
#define GET_BYTE_MODE(iop) ((iop)->__orientation & _BYTE_MODE_FLAG)
#define SET_WC_MODE(iop) ((iop)->__orientation |= _WC_MODE_FLAG)
#define CLEAR_WC_MODE(iop) ((iop)->__orientation &= ~_WC_MODE_FLAG)
#define GET_WC_MODE(iop) ((iop)->__orientation & _WC_MODE_FLAG)
#define GET_NO_MODE(iop) (!((iop)->__orientation & \
(_BYTE_MODE_FLAG | _WC_MODE_FLAG)))
#define SET_SEEKABLE(iop) ((iop)->__seekable = 1)
#define CLEAR_SEEKABLE(iop) ((iop)->__seekable = 0)
#define GET_SEEKABLE(iop) ((iop)->__seekable)
/* Is iop a member of the _iob array? */
#define STDIOP(iop) ((iop) >= &_iob[0] && (iop) < &_iob[_NFILE])
/* Compute the index of an _iob array member */
#define IOPIND(iop) ((iop) - &_iob[0])
#endif
typedef unsigned char Uchar;
#define _flockrel(rl) cancel_safe_mutex_unlock(rl)
#define MAXVAL (MAXINT - (MAXINT % BUFSIZ))
/*
* The number of actual pushback characters is the value
* of PUSHBACK plus the first byte of the buffer. The FILE buffer must,
* for performance reasons, start on a word aligned boundry so the value
* of PUSHBACK should be a multiple of word.
* At least 4 bytes of PUSHBACK are needed. If sizeof (int) = 1 this breaks.
*/
#define PUSHBACK (((3 + sizeof (int) - 1) / sizeof (int)) * sizeof (int))
/* minimum buffer size must be at least 8 or shared library will break */
#define _SMBFSZ (((PUSHBACK + 4) < 8) ? 8 : (PUSHBACK + 4))
#if BUFSIZ == 1024
#define MULTIBFSZ(SZ) ((SZ) & ~0x3ff)
#elif BUFSIZ == 512
#define MULTIBFSZ(SZ) ((SZ) & ~0x1ff)
#else
#define MULTIBFSZ(SZ) ((SZ) - (SZ % BUFSIZ))
#endif
#undef _bufend
#define _bufend(iop) _realbufend(iop)
/*
* Internal data
*/
extern Uchar _smbuf[][_SMBFSZ];
/*
* Internal routines from flush.c
*/
extern void __cleanup(void);
extern void _flushlbf(void);
extern FILE *_findiop(void);
/*
* this is to be found in <stdio.h> for 32bit mode
*/
#ifdef _LP64
extern int __filbuf(FILE *);
extern int __flsbuf(int, FILE *);
/*
* Not needed as a function in 64 bit mode.
*/
#define _realbufend(iop) ((iop)->_end)
#else
extern Uchar *_realbufend(FILE *iop);
extern rmutex_t *_reallock(FILE *iop);
#endif /* _LP64 */
extern void _setbufend(FILE *iop, Uchar *end);
extern rmutex_t *_flockget(FILE *iop);
extern int _xflsbuf(FILE *iop);
extern int _wrtchk(FILE *iop);
extern void _bufsync(FILE *iop, Uchar *bufend);
extern int _fflush_u(FILE *iop);
extern int close_fd(FILE *iop);
extern int _doscan(FILE *, const char *, va_list);
#ifdef _LP64
extern void close_pid(void);
#endif /* _LP64 */
/*
* Internal routines from flush.c
*/
extern int _file_get(FILE *);
extern int _file_set(FILE *, int, const char *);
/*
* Macros to aid the extended fd FILE work.
* This helps isolate the changes to only the 32-bit code
* since 64-bit Solaris is not affected by this.
*/
#ifdef _LP64
#define GET_FD(iop) ((iop)->_file)
#define SET_FILE(iop, fd) ((iop)->_file = (fd))
#else
#define GET_FD(iop) \
(((iop)->__extendedfd) ? _file_get(iop) : (iop)->_magic)
#define SET_FILE(iop, fd) (iop)->_magic = (fd); (iop)->__extendedfd = 0
#endif
/*
* Maximum size of the file descriptor stored in the FILE structure.
*/
#ifdef _LP64
#define _FILE_FD_MAX INT_MAX
#else
#define _FILE_FD_MAX 255
#endif
/*
* Internal routines from fileno.c
*/
extern int _fileno(FILE *iop);
/*
* Internal routines from _findbuf.c
*/
extern Uchar *_findbuf(FILE *iop);
/*
* Internal routine used by fopen.c
*/
extern FILE *_endopen(const char *, const char *, FILE *, int);
/*
* Internal routine from fwrite.c
*/
extern size_t _fwrite_unlocked(const void *, size_t, size_t, FILE *);
/*
* Internal routine from getc.c
*/
int _getc_unlocked(FILE *);
/*
* Internal routine from put.c
*/
int _putc_unlocked(int, FILE *);
/*
* Internal routine from ungetc.c
*/
int _ungetc_unlocked(int, FILE *);
/*
* The following macros improve performance of the stdio by reducing the
* number of calls to _bufsync and _wrtchk. _needsync checks whether
* or not _bufsync needs to be called. _WRTCHK has the same effect as
* _wrtchk, but often these functions have no effect, and in those cases
* the macros avoid the expense of calling the functions.
*/
#define _needsync(p, bufend) ((bufend - (p)->_ptr) < \
((p)->_cnt < 0 ? 0 : (p)->_cnt))
#define _WRTCHK(iop) ((((iop->_flag & (_IOWRT | _IOEOF)) != _IOWRT) || \
(iop->_base == 0) || \
(iop->_ptr == iop->_base && iop->_cnt == 0 && \
!(iop->_flag & (_IONBF | _IOLBF)))) \
? _wrtchk(iop) : 0)
#ifdef _LP64
#define IOB_LCK(iop) (&((iop)->_lock))
#else
#define IOB_LCK(iop) (STDIOP(iop) ? &_xftab[IOPIND(iop)]._lock \
: _reallock(iop))
extern struct xFILEdata _xftab[];
#endif /* _LP64 */
#endif /* _STDIOM_H */