1/* 2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26#include <fcntl.h> 27#include <limits.h> 28 29#include "jni.h" 30#include "jni_util.h" 31#include "jlong.h" 32#include "io_util.h" 33 34#include "jvm.h" 35 36#include "java_io_FileInputStream.h" 37 38#include "io_util_md.h" 39 40/*******************************************************************/ 41/* BEGIN JNI ********* BEGIN JNI *********** BEGIN JNI ************/ 42/*******************************************************************/ 43 44jfieldID fis_fd; /* id for jobject 'fd' in java.io.FileInputStream */ 45 46/************************************************************** 47 * static methods to store field ID's in initializers 48 */ 49 50JNIEXPORT void JNICALL 51Java_java_io_FileInputStream_initIDs(JNIEnv *env, jclass fdClass) { 52 fis_fd = (*env)->GetFieldID(env, fdClass, "fd", "Ljava/io/FileDescriptor;"); 53} 54 55/************************************************************** 56 * Input stream 57 */ 58 59JNIEXPORT void JNICALL 60Java_java_io_FileInputStream_open0(JNIEnv *env, jobject this, jstring path) { 61 fileOpen(env, this, path, fis_fd, O_RDONLY); 62} 63 64JNIEXPORT jint JNICALL 65Java_java_io_FileInputStream_read0(JNIEnv *env, jobject this) { 66 return readSingle(env, this, fis_fd); 67} 68 69JNIEXPORT jint JNICALL 70Java_java_io_FileInputStream_readBytes(JNIEnv *env, jobject this, 71 jbyteArray bytes, jint off, jint len) { 72 return readBytes(env, this, bytes, off, len, fis_fd); 73} 74 75JNIEXPORT jlong JNICALL 76Java_java_io_FileInputStream_skip0(JNIEnv *env, jobject this, jlong toSkip) { 77 jlong cur = jlong_zero; 78 jlong end = jlong_zero; 79 FD fd = GET_FD(this, fis_fd); 80 if (fd == -1) { 81 JNU_ThrowIOException (env, "Stream Closed"); 82 return 0; 83 } 84 if ((cur = IO_Lseek(fd, (jlong)0, (jint)SEEK_CUR)) == -1) { 85 JNU_ThrowIOExceptionWithLastError(env, "Seek error"); 86 } else if ((end = IO_Lseek(fd, toSkip, (jint)SEEK_CUR)) == -1) { 87 JNU_ThrowIOExceptionWithLastError(env, "Seek error"); 88 } 89 return (end - cur); 90} 91 92JNIEXPORT jint JNICALL 93Java_java_io_FileInputStream_available0(JNIEnv *env, jobject this) { 94 jlong ret; 95 FD fd = GET_FD(this, fis_fd); 96 if (fd == -1) { 97 JNU_ThrowIOException (env, "Stream Closed"); 98 return 0; 99 } 100 if (IO_Available(fd, &ret)) { 101 if (ret > INT_MAX) { 102 ret = (jlong) INT_MAX; 103 } else if (ret < 0) { 104 ret = 0; 105 } 106 return jlong_to_jint(ret); 107 } 108 JNU_ThrowIOExceptionWithLastError(env, NULL); 109 return 0; 110} 111