17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*7257d1b4Sraf * Common Development and Distribution License (the "License"). 6*7257d1b4Sraf * You may not use this file except in compliance with the License. 77c478bd9Sstevel@tonic-gate * 87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 117c478bd9Sstevel@tonic-gate * and limitations under the License. 127c478bd9Sstevel@tonic-gate * 137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 187c478bd9Sstevel@tonic-gate * 197c478bd9Sstevel@tonic-gate * CDDL HEADER END 207c478bd9Sstevel@tonic-gate */ 21*7257d1b4Sraf 227c478bd9Sstevel@tonic-gate /* 23*7257d1b4Sraf * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 247c478bd9Sstevel@tonic-gate * Use is subject to license terms. 257c478bd9Sstevel@tonic-gate */ 267c478bd9Sstevel@tonic-gate 277c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 287c478bd9Sstevel@tonic-gate 29*7257d1b4Sraf #include "lint.h" 307c478bd9Sstevel@tonic-gate #include "file64.h" 317c478bd9Sstevel@tonic-gate #include <sys/types.h> 327c478bd9Sstevel@tonic-gate #include <stdio.h> 337c478bd9Sstevel@tonic-gate #include <mtlib.h> 347c478bd9Sstevel@tonic-gate #include "stdiom.h" 357c478bd9Sstevel@tonic-gate #include <stdio_ext.h> 367c478bd9Sstevel@tonic-gate 377c478bd9Sstevel@tonic-gate /* 387c478bd9Sstevel@tonic-gate * Returns non-zero if the file is open readonly, or if the last operation 397c478bd9Sstevel@tonic-gate * on the stream was a read e.g. fread() or fgetc(). Otherwise returns 0. 407c478bd9Sstevel@tonic-gate */ 417c478bd9Sstevel@tonic-gate int 427c478bd9Sstevel@tonic-gate __freading(FILE *stream) 437c478bd9Sstevel@tonic-gate { 447c478bd9Sstevel@tonic-gate return (stream->_flag & _IOREAD); 457c478bd9Sstevel@tonic-gate } 467c478bd9Sstevel@tonic-gate 477c478bd9Sstevel@tonic-gate /* 487c478bd9Sstevel@tonic-gate * Returns non-zero if the file is open write-only or append-only, or if 497c478bd9Sstevel@tonic-gate * the last operation on the stream was a write e.g. fwrite() or fputc(). 507c478bd9Sstevel@tonic-gate * Otherwise returns 0. 517c478bd9Sstevel@tonic-gate */ 527c478bd9Sstevel@tonic-gate int 537c478bd9Sstevel@tonic-gate __fwriting(FILE *stream) 547c478bd9Sstevel@tonic-gate { 557c478bd9Sstevel@tonic-gate return (stream->_flag & _IOWRT); 567c478bd9Sstevel@tonic-gate } 577c478bd9Sstevel@tonic-gate 587c478bd9Sstevel@tonic-gate /* 597c478bd9Sstevel@tonic-gate * Returns non-zero if it is possible to read from a stream. 607c478bd9Sstevel@tonic-gate */ 617c478bd9Sstevel@tonic-gate int 627c478bd9Sstevel@tonic-gate __freadable(FILE *stream) 637c478bd9Sstevel@tonic-gate { 647c478bd9Sstevel@tonic-gate return (stream->_flag & (_IOREAD|_IORW)); 657c478bd9Sstevel@tonic-gate } 667c478bd9Sstevel@tonic-gate 677c478bd9Sstevel@tonic-gate /* 687c478bd9Sstevel@tonic-gate * Returns non-zero if it is possible to write on a stream. 697c478bd9Sstevel@tonic-gate */ 707c478bd9Sstevel@tonic-gate int 717c478bd9Sstevel@tonic-gate __fwritable(FILE *stream) 727c478bd9Sstevel@tonic-gate { 737c478bd9Sstevel@tonic-gate return (stream->_flag & (_IOWRT|_IORW)); 747c478bd9Sstevel@tonic-gate } 757c478bd9Sstevel@tonic-gate 767c478bd9Sstevel@tonic-gate /* 777c478bd9Sstevel@tonic-gate * Returns non-zero if the stream is line buffered. 787c478bd9Sstevel@tonic-gate */ 797c478bd9Sstevel@tonic-gate int 807c478bd9Sstevel@tonic-gate __flbf(FILE *stream) 817c478bd9Sstevel@tonic-gate { 827c478bd9Sstevel@tonic-gate return (stream->_flag & _IOLBF); 837c478bd9Sstevel@tonic-gate } 847c478bd9Sstevel@tonic-gate 857c478bd9Sstevel@tonic-gate /* 867c478bd9Sstevel@tonic-gate * Discard any pending buffered I/O. 877c478bd9Sstevel@tonic-gate */ 887c478bd9Sstevel@tonic-gate void 897c478bd9Sstevel@tonic-gate __fpurge(FILE *stream) 907c478bd9Sstevel@tonic-gate { 917c478bd9Sstevel@tonic-gate rmutex_t *lk; 927c478bd9Sstevel@tonic-gate 937c478bd9Sstevel@tonic-gate FLOCKFILE(lk, stream); 947c478bd9Sstevel@tonic-gate if ((stream->_ptr = stream->_base) != NULL) 957c478bd9Sstevel@tonic-gate stream->_cnt = 0; 967c478bd9Sstevel@tonic-gate FUNLOCKFILE(lk); 977c478bd9Sstevel@tonic-gate } 987c478bd9Sstevel@tonic-gate 997c478bd9Sstevel@tonic-gate /* 1007c478bd9Sstevel@tonic-gate * Return the amount of output pending on a stream (in bytes). 1017c478bd9Sstevel@tonic-gate */ 1027c478bd9Sstevel@tonic-gate size_t 1037c478bd9Sstevel@tonic-gate __fpending(FILE *stream) 1047c478bd9Sstevel@tonic-gate { 1057c478bd9Sstevel@tonic-gate size_t amount; 1067c478bd9Sstevel@tonic-gate rmutex_t *lk; 1077c478bd9Sstevel@tonic-gate 1087c478bd9Sstevel@tonic-gate FLOCKFILE(lk, stream); 1097c478bd9Sstevel@tonic-gate amount = stream->_ptr - stream->_base; 1107c478bd9Sstevel@tonic-gate FUNLOCKFILE(lk); 1117c478bd9Sstevel@tonic-gate return (amount); 1127c478bd9Sstevel@tonic-gate } 1137c478bd9Sstevel@tonic-gate 1147c478bd9Sstevel@tonic-gate /* 1157c478bd9Sstevel@tonic-gate * Returns the buffer size (in bytes) currently in use by the given stream. 1167c478bd9Sstevel@tonic-gate */ 1177c478bd9Sstevel@tonic-gate size_t 1187c478bd9Sstevel@tonic-gate __fbufsize(FILE *stream) 1197c478bd9Sstevel@tonic-gate { 1207c478bd9Sstevel@tonic-gate size_t size; 1217c478bd9Sstevel@tonic-gate rmutex_t *lk; 1227c478bd9Sstevel@tonic-gate 1237c478bd9Sstevel@tonic-gate FLOCKFILE(lk, stream); 1247c478bd9Sstevel@tonic-gate size = _bufend(stream) - stream->_base; 1257c478bd9Sstevel@tonic-gate FUNLOCKFILE(lk); 1267c478bd9Sstevel@tonic-gate return (size); 1277c478bd9Sstevel@tonic-gate } 128