FileInputStream.c revision 51b1b6997fd3f980076b8081f7f1165ccc2a4008
151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski/* 251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Copyright (c) 1997, 2007, Oracle and/or its affiliates. All rights reserved. 351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * This code is free software; you can redistribute it and/or modify it 651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * under the terms of the GNU General Public License version 2 only, as 751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * published by the Free Software Foundation. Oracle designates this 851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * particular file as subject to the "Classpath" exception as provided 951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * by Oracle in the LICENSE file that accompanied this code. 1051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 1151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * This code is distributed in the hope that it will be useful, but WITHOUT 1251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * version 2 for more details (a copy is included in the LICENSE file that 1551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * accompanied this code). 1651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 1751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * You should have received a copy of the GNU General Public License version 1851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 2 along with this work; if not, write to the Free Software Foundation, 1951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 2051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 2151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 2251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * or visit www.oracle.com if you need additional information or have any 2351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * questions. 2451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 2551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 2651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski#include "jni.h" 2751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski#include "jni_util.h" 2851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski#include "jlong.h" 2951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski#include "io_util.h" 3051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 3151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski#include "jvm.h" 3251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 3351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski#include "java_io_FileInputStream.h" 3451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 3551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski#include <fcntl.h> 3651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski#include <limits.h> 3751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 3851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski#include "io_util_md.h" 3951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 4051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski/*******************************************************************/ 4151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski/* BEGIN JNI ********* BEGIN JNI *********** BEGIN JNI ************/ 4251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski/*******************************************************************/ 4351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 4451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr JastrzebskijfieldID fis_fd; /* id for jobject 'fd' in java.io.FileInputStream */ 4551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 4651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski/************************************************************** 4751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * static methods to store field ID's in initializers 4851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 4951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 5051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr JastrzebskiJNIEXPORT void JNICALL 5151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr JastrzebskiJava_java_io_FileInputStream_initIDs(JNIEnv *env, jclass fdClass) { 5251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski fis_fd = (*env)->GetFieldID(env, fdClass, "fd", "Ljava/io/FileDescriptor;"); 5351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski} 5451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 5551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski/************************************************************** 5651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Input stream 5751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 5851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 5951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr JastrzebskiJNIEXPORT void JNICALL 6051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr JastrzebskiJava_java_io_FileInputStream_open(JNIEnv *env, jobject this, jstring path) { 6151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski fileOpen(env, this, path, fis_fd, O_RDONLY); 6251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski} 6351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 6451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr JastrzebskiJNIEXPORT jint JNICALL 6551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr JastrzebskiJava_java_io_FileInputStream_read0(JNIEnv *env, jobject this) { 6651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return readSingle(env, this, fis_fd); 6751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski} 6851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 6951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr JastrzebskiJNIEXPORT jint JNICALL 7051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr JastrzebskiJava_java_io_FileInputStream_readBytes(JNIEnv *env, jobject this, 7151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski jbyteArray bytes, jint off, jint len) { 7251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return readBytes(env, this, bytes, off, len, fis_fd); 7351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski} 7451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 7551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr JastrzebskiJNIEXPORT jlong JNICALL 7651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr JastrzebskiJava_java_io_FileInputStream_skip(JNIEnv *env, jobject this, jlong toSkip) { 7751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski jlong cur = jlong_zero; 7851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski jlong end = jlong_zero; 7951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski FD fd = GET_FD(this, fis_fd); 8051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski if (fd == -1) { 8151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski JNU_ThrowIOException (env, "Stream Closed"); 8251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return 0; 8351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 8451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski if ((cur = IO_Lseek(fd, (jlong)0, (jint)SEEK_CUR)) == -1) { 8551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski JNU_ThrowIOExceptionWithLastError(env, "Seek error"); 8651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } else if ((end = IO_Lseek(fd, toSkip, (jint)SEEK_CUR)) == -1) { 8751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski JNU_ThrowIOExceptionWithLastError(env, "Seek error"); 8851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 8951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return (end - cur); 9051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski} 9151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 9251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr JastrzebskiJNIEXPORT jint JNICALL 9351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr JastrzebskiJava_java_io_FileInputStream_available(JNIEnv *env, jobject this) { 9451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski jlong ret; 9551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski FD fd = GET_FD(this, fis_fd); 9651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski if (fd == -1) { 9751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski JNU_ThrowIOException (env, "Stream Closed"); 9851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return 0; 9951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 10051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski if (IO_Available(fd, &ret)) { 10151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski if (ret > INT_MAX) { 10251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski ret = (jlong) INT_MAX; 10351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 10451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return jlong_to_jint(ret); 10551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 10651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski JNU_ThrowIOExceptionWithLastError(env, NULL); 10751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski return 0; 10851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski} 109