1*7c478bd9Sstevel@tonic-gate /* 2*7c478bd9Sstevel@tonic-gate * CDDL HEADER START 3*7c478bd9Sstevel@tonic-gate * 4*7c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*7c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*7c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*7c478bd9Sstevel@tonic-gate * with the License. 8*7c478bd9Sstevel@tonic-gate * 9*7c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*7c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*7c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 12*7c478bd9Sstevel@tonic-gate * and limitations under the License. 13*7c478bd9Sstevel@tonic-gate * 14*7c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*7c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*7c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*7c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*7c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*7c478bd9Sstevel@tonic-gate * 20*7c478bd9Sstevel@tonic-gate * CDDL HEADER END 21*7c478bd9Sstevel@tonic-gate */ 22*7c478bd9Sstevel@tonic-gate /* 23*7c478bd9Sstevel@tonic-gate * Copyright 1997 Sun Microsystems, Inc. All rights reserved. 24*7c478bd9Sstevel@tonic-gate * Use is subject to license terms. 25*7c478bd9Sstevel@tonic-gate */ 26*7c478bd9Sstevel@tonic-gate 27*7c478bd9Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28*7c478bd9Sstevel@tonic-gate /* All Rights Reserved */ 29*7c478bd9Sstevel@tonic-gate 30*7c478bd9Sstevel@tonic-gate /* 31*7c478bd9Sstevel@tonic-gate * University Copyright- Copyright (c) 1982, 1986, 1988 32*7c478bd9Sstevel@tonic-gate * The Regents of the University of California 33*7c478bd9Sstevel@tonic-gate * All Rights Reserved 34*7c478bd9Sstevel@tonic-gate * 35*7c478bd9Sstevel@tonic-gate * University Acknowledgment- Portions of this document are derived from 36*7c478bd9Sstevel@tonic-gate * software developed by the University of California, Berkeley, and its 37*7c478bd9Sstevel@tonic-gate * contributors. 38*7c478bd9Sstevel@tonic-gate */ 39*7c478bd9Sstevel@tonic-gate 40*7c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 41*7c478bd9Sstevel@tonic-gate 42*7c478bd9Sstevel@tonic-gate /* 43*7c478bd9Sstevel@tonic-gate * stdiom.h - shared guts of stdio therefore it doesn't need 44*7c478bd9Sstevel@tonic-gate * a surrounding #ifndef 45*7c478bd9Sstevel@tonic-gate */ 46*7c478bd9Sstevel@tonic-gate 47*7c478bd9Sstevel@tonic-gate #ifndef _STDIOM_H 48*7c478bd9Sstevel@tonic-gate #define _STDIOM_H 49*7c478bd9Sstevel@tonic-gate 50*7c478bd9Sstevel@tonic-gate typedef unsigned char Uchar; 51*7c478bd9Sstevel@tonic-gate 52*7c478bd9Sstevel@tonic-gate #define MAXVAL (MAXINT - (MAXINT % BUFSIZ)) 53*7c478bd9Sstevel@tonic-gate 54*7c478bd9Sstevel@tonic-gate /* 55*7c478bd9Sstevel@tonic-gate * The number of actual pushback characters is the value 56*7c478bd9Sstevel@tonic-gate * of PUSHBACK plus the first byte of the buffer. The FILE buffer must, 57*7c478bd9Sstevel@tonic-gate * for performance reasons, start on a word aligned boundry so the value 58*7c478bd9Sstevel@tonic-gate * of PUSHBACK should be a multiple of word. 59*7c478bd9Sstevel@tonic-gate * At least 4 bytes of PUSHBACK are needed. If sizeof(int) = 1 this breaks. 60*7c478bd9Sstevel@tonic-gate */ 61*7c478bd9Sstevel@tonic-gate 62*7c478bd9Sstevel@tonic-gate #define PUSHBACK ((int)(((3 + sizeof (int) - 1) / sizeof (int)) * sizeof (int))) 63*7c478bd9Sstevel@tonic-gate 64*7c478bd9Sstevel@tonic-gate /* minimum buffer size must be at least 8 or shared library will break */ 65*7c478bd9Sstevel@tonic-gate #define _SMBFSZ (((PUSHBACK + 4) < 8) ? 8 : (PUSHBACK + 4)) 66*7c478bd9Sstevel@tonic-gate 67*7c478bd9Sstevel@tonic-gate extern Uchar *_bufendtab[]; 68*7c478bd9Sstevel@tonic-gate 69*7c478bd9Sstevel@tonic-gate #if BUFSIZ == 1024 70*7c478bd9Sstevel@tonic-gate #define MULTIBFSZ(SZ) ((SZ) & ~0x3ff) 71*7c478bd9Sstevel@tonic-gate #elif BUFSIZ == 512 72*7c478bd9Sstevel@tonic-gate #define MULTIBFSZ(SZ) ((SZ) & ~0x1ff) 73*7c478bd9Sstevel@tonic-gate #else 74*7c478bd9Sstevel@tonic-gate #define MULTIBFSZ(SZ) ((SZ) - (SZ % BUFSIZ)) 75*7c478bd9Sstevel@tonic-gate #endif 76*7c478bd9Sstevel@tonic-gate 77*7c478bd9Sstevel@tonic-gate #define _bufend(iop) _realbufend(iop) 78*7c478bd9Sstevel@tonic-gate #define setbufend(iop, end) _setbufend(iop, end) 79*7c478bd9Sstevel@tonic-gate 80*7c478bd9Sstevel@tonic-gate /* 81*7c478bd9Sstevel@tonic-gate * Internal routines from _iob.c 82*7c478bd9Sstevel@tonic-gate */ 83*7c478bd9Sstevel@tonic-gate extern void _cleanup(void); 84*7c478bd9Sstevel@tonic-gate extern void _flushlbf(void); 85*7c478bd9Sstevel@tonic-gate extern FILE *_findiop(void); 86*7c478bd9Sstevel@tonic-gate extern Uchar *_realbufend(FILE *iop); 87*7c478bd9Sstevel@tonic-gate extern void _setbufend(FILE *iop, Uchar *end); 88*7c478bd9Sstevel@tonic-gate extern int _wrtchk(FILE *iop); 89*7c478bd9Sstevel@tonic-gate 90*7c478bd9Sstevel@tonic-gate /* 91*7c478bd9Sstevel@tonic-gate * Internal routines from flush.c 92*7c478bd9Sstevel@tonic-gate */ 93*7c478bd9Sstevel@tonic-gate extern void _bufsync(FILE *iop, Uchar *bufend); 94*7c478bd9Sstevel@tonic-gate extern int _xflsbuf(FILE *iop); 95*7c478bd9Sstevel@tonic-gate 96*7c478bd9Sstevel@tonic-gate /* 97*7c478bd9Sstevel@tonic-gate * Internal routines from _findbuf.c 98*7c478bd9Sstevel@tonic-gate */ 99*7c478bd9Sstevel@tonic-gate extern Uchar *_findbuf(FILE *iop); 100*7c478bd9Sstevel@tonic-gate 101*7c478bd9Sstevel@tonic-gate /* 102*7c478bd9Sstevel@tonic-gate * The following macros improve performance of the stdio by reducing the 103*7c478bd9Sstevel@tonic-gate * number of calls to _bufsync and _wrtchk. _needsync checks whether 104*7c478bd9Sstevel@tonic-gate * or not _bufsync needs to be called. _WRTCHK has the same effect as 105*7c478bd9Sstevel@tonic-gate * _wrtchk, but often these functions have no effect, and in those cases 106*7c478bd9Sstevel@tonic-gate * the macros avoid the expense of calling the functions. 107*7c478bd9Sstevel@tonic-gate */ 108*7c478bd9Sstevel@tonic-gate 109*7c478bd9Sstevel@tonic-gate #define _needsync(p, bufend) ((bufend - (p)->_ptr) < \ 110*7c478bd9Sstevel@tonic-gate ((p)->_cnt < 0 ? 0 : (p)->_cnt)) 111*7c478bd9Sstevel@tonic-gate 112*7c478bd9Sstevel@tonic-gate #define _WRTCHK(iop) ((((iop->_flag & (_IOWRT | _IOEOF)) != _IOWRT) || \ 113*7c478bd9Sstevel@tonic-gate (iop->_base == 0) || \ 114*7c478bd9Sstevel@tonic-gate (iop->_ptr == iop->_base && iop->_cnt == 0 && \ 115*7c478bd9Sstevel@tonic-gate !(iop->_flag & (_IONBF | _IOLBF)))) \ 116*7c478bd9Sstevel@tonic-gate ? _wrtchk(iop) : 0) 117*7c478bd9Sstevel@tonic-gate #endif /* _STDIOM_H */ 118