J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1997-2007 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | #include "jni.h" |
| 27 | #include "jni_util.h" |
| 28 | #include "jlong.h" |
| 29 | #include "jvm.h" |
| 30 | |
| 31 | #include "io_util.h" |
| 32 | #include "io_util_md.h" |
| 33 | #include "java_io_RandomAccessFile.h" |
| 34 | |
| 35 | #include <fcntl.h> |
| 36 | |
| 37 | /* |
| 38 | * static method to store field ID's in initializers |
| 39 | */ |
| 40 | |
| 41 | jfieldID raf_fd; /* id for jobject 'fd' in java.io.RandomAccessFile */ |
| 42 | |
| 43 | JNIEXPORT void JNICALL |
| 44 | Java_java_io_RandomAccessFile_initIDs(JNIEnv *env, jclass fdClass) { |
| 45 | raf_fd = (*env)->GetFieldID(env, fdClass, "fd", "Ljava/io/FileDescriptor;"); |
| 46 | } |
| 47 | |
| 48 | |
| 49 | JNIEXPORT void JNICALL |
| 50 | Java_java_io_RandomAccessFile_open(JNIEnv *env, |
| 51 | jobject this, jstring path, jint mode) |
| 52 | { |
| 53 | int flags = 0; |
| 54 | if (mode & java_io_RandomAccessFile_O_RDONLY) |
| 55 | flags = O_RDONLY; |
| 56 | else if (mode & java_io_RandomAccessFile_O_RDWR) { |
| 57 | flags = O_RDWR | O_CREAT; |
| 58 | if (mode & java_io_RandomAccessFile_O_SYNC) |
| 59 | flags |= O_SYNC; |
| 60 | else if (mode & java_io_RandomAccessFile_O_DSYNC) |
| 61 | flags |= O_DSYNC; |
| 62 | } |
| 63 | fileOpen(env, this, path, raf_fd, flags); |
| 64 | } |
| 65 | |
| 66 | JNIEXPORT jint JNICALL |
| 67 | Java_java_io_RandomAccessFile_read(JNIEnv *env, jobject this) { |
| 68 | return readSingle(env, this, raf_fd); |
| 69 | } |
| 70 | |
| 71 | JNIEXPORT jint JNICALL |
| 72 | Java_java_io_RandomAccessFile_readBytes(JNIEnv *env, |
| 73 | jobject this, jbyteArray bytes, jint off, jint len) { |
| 74 | return readBytes(env, this, bytes, off, len, raf_fd); |
| 75 | } |
| 76 | |
| 77 | JNIEXPORT void JNICALL |
| 78 | Java_java_io_RandomAccessFile_write(JNIEnv *env, jobject this, jint byte) { |
| 79 | writeSingle(env, this, byte, raf_fd); |
| 80 | } |
| 81 | |
| 82 | JNIEXPORT void JNICALL |
| 83 | Java_java_io_RandomAccessFile_writeBytes(JNIEnv *env, |
| 84 | jobject this, jbyteArray bytes, jint off, jint len) { |
| 85 | writeBytes(env, this, bytes, off, len, raf_fd); |
| 86 | } |
| 87 | |
| 88 | JNIEXPORT jlong JNICALL |
| 89 | Java_java_io_RandomAccessFile_getFilePointer(JNIEnv *env, jobject this) { |
| 90 | FD fd; |
| 91 | jlong ret; |
| 92 | |
| 93 | fd = GET_FD(this, raf_fd); |
| 94 | if (fd == -1) { |
| 95 | JNU_ThrowIOException(env, "Stream Closed"); |
| 96 | return -1; |
| 97 | } |
| 98 | if ((ret = IO_Lseek(fd, 0L, SEEK_CUR)) == -1) { |
| 99 | JNU_ThrowIOExceptionWithLastError(env, "Seek failed"); |
| 100 | } |
| 101 | return ret; |
| 102 | } |
| 103 | |
| 104 | JNIEXPORT jlong JNICALL |
| 105 | Java_java_io_RandomAccessFile_length(JNIEnv *env, jobject this) { |
| 106 | FD fd; |
| 107 | jlong cur = jlong_zero; |
| 108 | jlong end = jlong_zero; |
| 109 | |
| 110 | fd = GET_FD(this, raf_fd); |
| 111 | if (fd == -1) { |
| 112 | JNU_ThrowIOException(env, "Stream Closed"); |
| 113 | return -1; |
| 114 | } |
| 115 | if ((cur = IO_Lseek(fd, 0L, SEEK_CUR)) == -1) { |
| 116 | JNU_ThrowIOExceptionWithLastError(env, "Seek failed"); |
| 117 | } else if ((end = IO_Lseek(fd, 0L, SEEK_END)) == -1) { |
| 118 | JNU_ThrowIOExceptionWithLastError(env, "Seek failed"); |
| 119 | } else if (IO_Lseek(fd, cur, SEEK_SET) == -1) { |
| 120 | JNU_ThrowIOExceptionWithLastError(env, "Seek failed"); |
| 121 | } |
| 122 | return end; |
| 123 | } |
| 124 | |
| 125 | JNIEXPORT void JNICALL |
| 126 | Java_java_io_RandomAccessFile_seek(JNIEnv *env, |
| 127 | jobject this, jlong pos) { |
| 128 | |
| 129 | FD fd; |
| 130 | |
| 131 | fd = GET_FD(this, raf_fd); |
| 132 | if (fd == -1) { |
| 133 | JNU_ThrowIOException(env, "Stream Closed"); |
| 134 | return; |
| 135 | } |
| 136 | if (pos < jlong_zero) { |
| 137 | JNU_ThrowIOException(env, "Negative seek offset"); |
| 138 | } else if (IO_Lseek(fd, pos, SEEK_SET) == -1) { |
| 139 | JNU_ThrowIOExceptionWithLastError(env, "Seek failed"); |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | JNIEXPORT void JNICALL |
| 144 | Java_java_io_RandomAccessFile_setLength(JNIEnv *env, jobject this, |
| 145 | jlong newLength) |
| 146 | { |
| 147 | FD fd; |
| 148 | jlong cur; |
| 149 | |
| 150 | fd = GET_FD(this, raf_fd); |
| 151 | if (fd == -1) { |
| 152 | JNU_ThrowIOException(env, "Stream Closed"); |
| 153 | return; |
| 154 | } |
| 155 | if ((cur = IO_Lseek(fd, 0L, SEEK_CUR)) == -1) goto fail; |
| 156 | if (IO_SetLength(fd, newLength) == -1) goto fail; |
| 157 | if (cur > newLength) { |
| 158 | if (IO_Lseek(fd, 0L, SEEK_END) == -1) goto fail; |
| 159 | } else { |
| 160 | if (IO_Lseek(fd, cur, SEEK_SET) == -1) goto fail; |
| 161 | } |
| 162 | return; |
| 163 | |
| 164 | fail: |
| 165 | JNU_ThrowIOExceptionWithLastError(env, "setLength failed"); |
| 166 | } |