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 /* Copyright (c) 1988 AT&T */ 287c478bd9Sstevel@tonic-gate /* All Rights Reserved */ 297c478bd9Sstevel@tonic-gate 30*7257d1b4Sraf #pragma ident "%Z%%M% %I% %E% SMI" 317c478bd9Sstevel@tonic-gate 32*7257d1b4Sraf #include "lint.h" 337c478bd9Sstevel@tonic-gate #include "file64.h" 347c478bd9Sstevel@tonic-gate #include "mtlib.h" 357c478bd9Sstevel@tonic-gate #include <stdio.h> 367c478bd9Sstevel@tonic-gate #include <stddef.h> 377c478bd9Sstevel@tonic-gate #include <values.h> 387c478bd9Sstevel@tonic-gate #include <memory.h> 397c478bd9Sstevel@tonic-gate #include <thread.h> 407c478bd9Sstevel@tonic-gate #include <synch.h> 417c478bd9Sstevel@tonic-gate #include <errno.h> 427c478bd9Sstevel@tonic-gate #include <sys/types.h> 437c478bd9Sstevel@tonic-gate #include "stdiom.h" 447c478bd9Sstevel@tonic-gate #include "mse.h" 457c478bd9Sstevel@tonic-gate 467c478bd9Sstevel@tonic-gate size_t 477c478bd9Sstevel@tonic-gate fread(void *ptr, size_t size, size_t count, FILE *iop) 487c478bd9Sstevel@tonic-gate { 497c478bd9Sstevel@tonic-gate ssize_t s; 507c478bd9Sstevel@tonic-gate int c; 517c478bd9Sstevel@tonic-gate char *dptr = (char *)ptr; 527c478bd9Sstevel@tonic-gate rmutex_t *lk; 537c478bd9Sstevel@tonic-gate 547c478bd9Sstevel@tonic-gate FLOCKFILE(lk, iop); 557c478bd9Sstevel@tonic-gate 567c478bd9Sstevel@tonic-gate _SET_ORIENTATION_BYTE(iop); 577c478bd9Sstevel@tonic-gate 587c478bd9Sstevel@tonic-gate /* is it a readable stream */ 597c478bd9Sstevel@tonic-gate if (!(iop->_flag & (_IOREAD | _IORW))) { 607c478bd9Sstevel@tonic-gate iop->_flag |= _IOERR; 617c478bd9Sstevel@tonic-gate errno = EBADF; 627c478bd9Sstevel@tonic-gate FUNLOCKFILE(lk); 637c478bd9Sstevel@tonic-gate return (0); 647c478bd9Sstevel@tonic-gate } 657c478bd9Sstevel@tonic-gate 667c478bd9Sstevel@tonic-gate if (iop->_flag & _IOEOF) { 677c478bd9Sstevel@tonic-gate FUNLOCKFILE(lk); 687c478bd9Sstevel@tonic-gate return (0); 697c478bd9Sstevel@tonic-gate } 707c478bd9Sstevel@tonic-gate 717c478bd9Sstevel@tonic-gate /* These checks are here to avoid the multiply */ 727c478bd9Sstevel@tonic-gate if (count == 1) 737c478bd9Sstevel@tonic-gate s = size; 747c478bd9Sstevel@tonic-gate else if (size == 1) 757c478bd9Sstevel@tonic-gate s = count; 767c478bd9Sstevel@tonic-gate else 777c478bd9Sstevel@tonic-gate s = size * count; 787c478bd9Sstevel@tonic-gate 797c478bd9Sstevel@tonic-gate while (s > 0) { 807c478bd9Sstevel@tonic-gate if (iop->_cnt < s) { 817c478bd9Sstevel@tonic-gate if (iop->_cnt > 0) { 827c478bd9Sstevel@tonic-gate (void) memcpy((void*)dptr, iop->_ptr, 837c478bd9Sstevel@tonic-gate iop->_cnt); 847c478bd9Sstevel@tonic-gate dptr += iop->_cnt; 857c478bd9Sstevel@tonic-gate s -= iop->_cnt; 867c478bd9Sstevel@tonic-gate } 877c478bd9Sstevel@tonic-gate /* 887c478bd9Sstevel@tonic-gate * filbuf clobbers _cnt & _ptr, 897c478bd9Sstevel@tonic-gate * so don't waste time setting them. 907c478bd9Sstevel@tonic-gate */ 917c478bd9Sstevel@tonic-gate if ((c = __filbuf(iop)) == EOF) 927c478bd9Sstevel@tonic-gate break; 937c478bd9Sstevel@tonic-gate *dptr++ = (char)c; 947c478bd9Sstevel@tonic-gate s--; 957c478bd9Sstevel@tonic-gate } 967c478bd9Sstevel@tonic-gate if (iop->_cnt >= s) { 977c478bd9Sstevel@tonic-gate char *tmp = (char *)iop->_ptr; 987c478bd9Sstevel@tonic-gate switch (s) { 997c478bd9Sstevel@tonic-gate case 8: 1007c478bd9Sstevel@tonic-gate *dptr++ = *tmp++; 1017c478bd9Sstevel@tonic-gate /*FALLTHRU*/ 1027c478bd9Sstevel@tonic-gate case 7: 1037c478bd9Sstevel@tonic-gate *dptr++ = *tmp++; 1047c478bd9Sstevel@tonic-gate /*FALLTHRU*/ 1057c478bd9Sstevel@tonic-gate case 6: 1067c478bd9Sstevel@tonic-gate *dptr++ = *tmp++; 1077c478bd9Sstevel@tonic-gate /*FALLTHRU*/ 1087c478bd9Sstevel@tonic-gate case 5: 1097c478bd9Sstevel@tonic-gate *dptr++ = *tmp++; 1107c478bd9Sstevel@tonic-gate /*FALLTHRU*/ 1117c478bd9Sstevel@tonic-gate case 4: 1127c478bd9Sstevel@tonic-gate *dptr++ = *tmp++; 1137c478bd9Sstevel@tonic-gate /*FALLTHRU*/ 1147c478bd9Sstevel@tonic-gate case 3: 1157c478bd9Sstevel@tonic-gate *dptr++ = *tmp++; 1167c478bd9Sstevel@tonic-gate /*FALLTHRU*/ 1177c478bd9Sstevel@tonic-gate case 2: 1187c478bd9Sstevel@tonic-gate *dptr++ = *tmp++; 1197c478bd9Sstevel@tonic-gate /*FALLTHRU*/ 1207c478bd9Sstevel@tonic-gate case 1: 1217c478bd9Sstevel@tonic-gate *dptr++ = *tmp++; 1227c478bd9Sstevel@tonic-gate break; 1237c478bd9Sstevel@tonic-gate default: 1247c478bd9Sstevel@tonic-gate (void) memcpy((void*)dptr, iop->_ptr, 1257c478bd9Sstevel@tonic-gate (size_t)s); 1267c478bd9Sstevel@tonic-gate } 1277c478bd9Sstevel@tonic-gate iop->_ptr += s; 1287c478bd9Sstevel@tonic-gate iop->_cnt -= s; 1297c478bd9Sstevel@tonic-gate FUNLOCKFILE(lk); 1307c478bd9Sstevel@tonic-gate return (count); 1317c478bd9Sstevel@tonic-gate } 1327c478bd9Sstevel@tonic-gate } 1337c478bd9Sstevel@tonic-gate FUNLOCKFILE(lk); 1347c478bd9Sstevel@tonic-gate return (size != 0 ? count - ((s + size - 1) / size) : 0); 1357c478bd9Sstevel@tonic-gate } 136