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 2004 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 #pragma ident "%Z%%M% %I% %E% SMI" 28*7c478bd9Sstevel@tonic-gate 29*7c478bd9Sstevel@tonic-gate #include "synonyms.h" 30*7c478bd9Sstevel@tonic-gate #include "file64.h" 31*7c478bd9Sstevel@tonic-gate #include <sys/types.h> 32*7c478bd9Sstevel@tonic-gate #include <stdio.h> 33*7c478bd9Sstevel@tonic-gate #include <mtlib.h> 34*7c478bd9Sstevel@tonic-gate #include "stdiom.h" 35*7c478bd9Sstevel@tonic-gate #include <stdio_ext.h> 36*7c478bd9Sstevel@tonic-gate 37*7c478bd9Sstevel@tonic-gate /* 38*7c478bd9Sstevel@tonic-gate * Returns non-zero if the file is open readonly, or if the last operation 39*7c478bd9Sstevel@tonic-gate * on the stream was a read e.g. fread() or fgetc(). Otherwise returns 0. 40*7c478bd9Sstevel@tonic-gate */ 41*7c478bd9Sstevel@tonic-gate int 42*7c478bd9Sstevel@tonic-gate __freading(FILE *stream) 43*7c478bd9Sstevel@tonic-gate { 44*7c478bd9Sstevel@tonic-gate return (stream->_flag & _IOREAD); 45*7c478bd9Sstevel@tonic-gate } 46*7c478bd9Sstevel@tonic-gate 47*7c478bd9Sstevel@tonic-gate /* 48*7c478bd9Sstevel@tonic-gate * Returns non-zero if the file is open write-only or append-only, or if 49*7c478bd9Sstevel@tonic-gate * the last operation on the stream was a write e.g. fwrite() or fputc(). 50*7c478bd9Sstevel@tonic-gate * Otherwise returns 0. 51*7c478bd9Sstevel@tonic-gate */ 52*7c478bd9Sstevel@tonic-gate int 53*7c478bd9Sstevel@tonic-gate __fwriting(FILE *stream) 54*7c478bd9Sstevel@tonic-gate { 55*7c478bd9Sstevel@tonic-gate return (stream->_flag & _IOWRT); 56*7c478bd9Sstevel@tonic-gate } 57*7c478bd9Sstevel@tonic-gate 58*7c478bd9Sstevel@tonic-gate /* 59*7c478bd9Sstevel@tonic-gate * Returns non-zero if it is possible to read from a stream. 60*7c478bd9Sstevel@tonic-gate */ 61*7c478bd9Sstevel@tonic-gate int 62*7c478bd9Sstevel@tonic-gate __freadable(FILE *stream) 63*7c478bd9Sstevel@tonic-gate { 64*7c478bd9Sstevel@tonic-gate return (stream->_flag & (_IOREAD|_IORW)); 65*7c478bd9Sstevel@tonic-gate } 66*7c478bd9Sstevel@tonic-gate 67*7c478bd9Sstevel@tonic-gate /* 68*7c478bd9Sstevel@tonic-gate * Returns non-zero if it is possible to write on a stream. 69*7c478bd9Sstevel@tonic-gate */ 70*7c478bd9Sstevel@tonic-gate int 71*7c478bd9Sstevel@tonic-gate __fwritable(FILE *stream) 72*7c478bd9Sstevel@tonic-gate { 73*7c478bd9Sstevel@tonic-gate return (stream->_flag & (_IOWRT|_IORW)); 74*7c478bd9Sstevel@tonic-gate } 75*7c478bd9Sstevel@tonic-gate 76*7c478bd9Sstevel@tonic-gate /* 77*7c478bd9Sstevel@tonic-gate * Returns non-zero if the stream is line buffered. 78*7c478bd9Sstevel@tonic-gate */ 79*7c478bd9Sstevel@tonic-gate int 80*7c478bd9Sstevel@tonic-gate __flbf(FILE *stream) 81*7c478bd9Sstevel@tonic-gate { 82*7c478bd9Sstevel@tonic-gate return (stream->_flag & _IOLBF); 83*7c478bd9Sstevel@tonic-gate } 84*7c478bd9Sstevel@tonic-gate 85*7c478bd9Sstevel@tonic-gate /* 86*7c478bd9Sstevel@tonic-gate * Discard any pending buffered I/O. 87*7c478bd9Sstevel@tonic-gate */ 88*7c478bd9Sstevel@tonic-gate void 89*7c478bd9Sstevel@tonic-gate __fpurge(FILE *stream) 90*7c478bd9Sstevel@tonic-gate { 91*7c478bd9Sstevel@tonic-gate rmutex_t *lk; 92*7c478bd9Sstevel@tonic-gate 93*7c478bd9Sstevel@tonic-gate FLOCKFILE(lk, stream); 94*7c478bd9Sstevel@tonic-gate if ((stream->_ptr = stream->_base) != NULL) 95*7c478bd9Sstevel@tonic-gate stream->_cnt = 0; 96*7c478bd9Sstevel@tonic-gate FUNLOCKFILE(lk); 97*7c478bd9Sstevel@tonic-gate } 98*7c478bd9Sstevel@tonic-gate 99*7c478bd9Sstevel@tonic-gate /* 100*7c478bd9Sstevel@tonic-gate * Return the amount of output pending on a stream (in bytes). 101*7c478bd9Sstevel@tonic-gate */ 102*7c478bd9Sstevel@tonic-gate size_t 103*7c478bd9Sstevel@tonic-gate __fpending(FILE *stream) 104*7c478bd9Sstevel@tonic-gate { 105*7c478bd9Sstevel@tonic-gate size_t amount; 106*7c478bd9Sstevel@tonic-gate rmutex_t *lk; 107*7c478bd9Sstevel@tonic-gate 108*7c478bd9Sstevel@tonic-gate FLOCKFILE(lk, stream); 109*7c478bd9Sstevel@tonic-gate amount = stream->_ptr - stream->_base; 110*7c478bd9Sstevel@tonic-gate FUNLOCKFILE(lk); 111*7c478bd9Sstevel@tonic-gate return (amount); 112*7c478bd9Sstevel@tonic-gate } 113*7c478bd9Sstevel@tonic-gate 114*7c478bd9Sstevel@tonic-gate /* 115*7c478bd9Sstevel@tonic-gate * Returns the buffer size (in bytes) currently in use by the given stream. 116*7c478bd9Sstevel@tonic-gate */ 117*7c478bd9Sstevel@tonic-gate size_t 118*7c478bd9Sstevel@tonic-gate __fbufsize(FILE *stream) 119*7c478bd9Sstevel@tonic-gate { 120*7c478bd9Sstevel@tonic-gate size_t size; 121*7c478bd9Sstevel@tonic-gate rmutex_t *lk; 122*7c478bd9Sstevel@tonic-gate 123*7c478bd9Sstevel@tonic-gate FLOCKFILE(lk, stream); 124*7c478bd9Sstevel@tonic-gate size = _bufend(stream) - stream->_base; 125*7c478bd9Sstevel@tonic-gate FUNLOCKFILE(lk); 126*7c478bd9Sstevel@tonic-gate return (size); 127*7c478bd9Sstevel@tonic-gate } 128