| /* |
| * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| #include "jni.h" |
| #include "jni_util.h" |
| #include "jlong.h" |
| #include "jvm.h" |
| |
| #include "io_util.h" |
| #include "io_util_md.h" |
| #include "java_io_RandomAccessFile.h" |
| |
| #include <fcntl.h> |
| |
| /* |
| * static method to store field ID's in initializers |
| */ |
| |
| jfieldID raf_fd; /* id for jobject 'fd' in java.io.RandomAccessFile */ |
| |
| JNIEXPORT void JNICALL |
| Java_java_io_RandomAccessFile_initIDs(JNIEnv *env, jclass fdClass) { |
| raf_fd = (*env)->GetFieldID(env, fdClass, "fd", "Ljava/io/FileDescriptor;"); |
| } |
| |
| |
| JNIEXPORT void JNICALL |
| Java_java_io_RandomAccessFile_open(JNIEnv *env, |
| jobject this, jstring path, jint mode) |
| { |
| int flags = 0; |
| if (mode & java_io_RandomAccessFile_O_RDONLY) |
| flags = O_RDONLY; |
| else if (mode & java_io_RandomAccessFile_O_RDWR) { |
| flags = O_RDWR | O_CREAT; |
| if (mode & java_io_RandomAccessFile_O_SYNC) |
| flags |= O_SYNC; |
| else if (mode & java_io_RandomAccessFile_O_DSYNC) |
| flags |= O_DSYNC; |
| } |
| fileOpen(env, this, path, raf_fd, flags); |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_java_io_RandomAccessFile_read(JNIEnv *env, jobject this) { |
| return readSingle(env, this, raf_fd); |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_java_io_RandomAccessFile_readBytes(JNIEnv *env, |
| jobject this, jbyteArray bytes, jint off, jint len) { |
| return readBytes(env, this, bytes, off, len, raf_fd); |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_java_io_RandomAccessFile_write(JNIEnv *env, jobject this, jint byte) { |
| writeSingle(env, this, byte, JNI_FALSE, raf_fd); |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_java_io_RandomAccessFile_writeBytes(JNIEnv *env, |
| jobject this, jbyteArray bytes, jint off, jint len) { |
| writeBytes(env, this, bytes, off, len, JNI_FALSE, raf_fd); |
| } |
| |
| JNIEXPORT jlong JNICALL |
| Java_java_io_RandomAccessFile_getFilePointer(JNIEnv *env, jobject this) { |
| FD fd; |
| jlong ret; |
| |
| fd = GET_FD(this, raf_fd); |
| if (fd == -1) { |
| JNU_ThrowIOException(env, "Stream Closed"); |
| return -1; |
| } |
| if ((ret = IO_Lseek(fd, 0L, SEEK_CUR)) == -1) { |
| JNU_ThrowIOExceptionWithLastError(env, "Seek failed"); |
| } |
| return ret; |
| } |
| |
| JNIEXPORT jlong JNICALL |
| Java_java_io_RandomAccessFile_length(JNIEnv *env, jobject this) { |
| FD fd; |
| jlong cur = jlong_zero; |
| jlong end = jlong_zero; |
| |
| fd = GET_FD(this, raf_fd); |
| if (fd == -1) { |
| JNU_ThrowIOException(env, "Stream Closed"); |
| return -1; |
| } |
| if ((cur = IO_Lseek(fd, 0L, SEEK_CUR)) == -1) { |
| JNU_ThrowIOExceptionWithLastError(env, "Seek failed"); |
| } else if ((end = IO_Lseek(fd, 0L, SEEK_END)) == -1) { |
| JNU_ThrowIOExceptionWithLastError(env, "Seek failed"); |
| } else if (IO_Lseek(fd, cur, SEEK_SET) == -1) { |
| JNU_ThrowIOExceptionWithLastError(env, "Seek failed"); |
| } |
| return end; |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_java_io_RandomAccessFile_seek0(JNIEnv *env, |
| jobject this, jlong pos) { |
| |
| FD fd; |
| |
| fd = GET_FD(this, raf_fd); |
| if (fd == -1) { |
| JNU_ThrowIOException(env, "Stream Closed"); |
| return; |
| } |
| if (pos < jlong_zero) { |
| JNU_ThrowIOException(env, "Negative seek offset"); |
| } else if (IO_Lseek(fd, pos, SEEK_SET) == -1) { |
| JNU_ThrowIOExceptionWithLastError(env, "Seek failed"); |
| } |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_java_io_RandomAccessFile_setLength(JNIEnv *env, jobject this, |
| jlong newLength) |
| { |
| FD fd; |
| jlong cur; |
| |
| fd = GET_FD(this, raf_fd); |
| if (fd == -1) { |
| JNU_ThrowIOException(env, "Stream Closed"); |
| return; |
| } |
| if ((cur = IO_Lseek(fd, 0L, SEEK_CUR)) == -1) goto fail; |
| if (IO_SetLength(fd, newLength) == -1) goto fail; |
| if (cur > newLength) { |
| if (IO_Lseek(fd, 0L, SEEK_END) == -1) goto fail; |
| } else { |
| if (IO_Lseek(fd, cur, SEEK_SET) == -1) goto fail; |
| } |
| return; |
| |
| fail: |
| JNU_ThrowIOExceptionWithLastError(env, "setLength failed"); |
| } |