J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1994-2007 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 <stdlib.h> |
| 27 | #include <string.h> |
| 28 | |
| 29 | #include "jni.h" |
| 30 | #include "jni_util.h" |
| 31 | #include "jvm.h" |
| 32 | #include "io_util.h" |
| 33 | #include "io_util_md.h" |
| 34 | |
| 35 | /* IO helper functions */ |
| 36 | |
| 37 | int |
| 38 | readSingle(JNIEnv *env, jobject this, jfieldID fid) { |
| 39 | int nread; |
| 40 | char ret; |
| 41 | FD fd = GET_FD(this, fid); |
| 42 | if (fd == -1) { |
| 43 | JNU_ThrowIOException (env, "Stream Closed"); |
| 44 | return -1; |
| 45 | } |
| 46 | nread = IO_Read(fd, &ret, 1); |
| 47 | if (nread == 0) { /* EOF */ |
| 48 | return -1; |
| 49 | } else if (nread == JVM_IO_ERR) { /* error */ |
| 50 | JNU_ThrowIOExceptionWithLastError(env, "Read error"); |
| 51 | } else if (nread == JVM_IO_INTR) { |
| 52 | JNU_ThrowByName(env, "java/io/InterruptedIOException", 0); |
| 53 | } |
| 54 | return ret & 0xFF; |
| 55 | } |
| 56 | |
| 57 | /* The maximum size of a stack-allocated buffer. |
| 58 | */ |
| 59 | #define BUF_SIZE 8192 |
| 60 | |
| 61 | |
| 62 | int |
| 63 | readBytes(JNIEnv *env, jobject this, jbyteArray bytes, |
| 64 | jint off, jint len, jfieldID fid) |
| 65 | { |
| 66 | int nread, datalen; |
| 67 | char stackBuf[BUF_SIZE]; |
| 68 | char *buf = 0; |
| 69 | FD fd; |
| 70 | |
| 71 | if (IS_NULL(bytes)) { |
| 72 | JNU_ThrowNullPointerException(env, 0); |
| 73 | return -1; |
| 74 | } |
| 75 | datalen = (*env)->GetArrayLength(env, bytes); |
| 76 | |
| 77 | if ((off < 0) || (off > datalen) || |
| 78 | (len < 0) || ((off + len) > datalen) || ((off + len) < 0)) { |
| 79 | JNU_ThrowByName(env, "java/lang/IndexOutOfBoundsException", 0); |
| 80 | return -1; |
| 81 | } |
| 82 | |
| 83 | if (len == 0) { |
| 84 | return 0; |
| 85 | } else if (len > BUF_SIZE) { |
| 86 | buf = malloc(len); |
| 87 | if (buf == 0) { |
| 88 | JNU_ThrowOutOfMemoryError(env, 0); |
| 89 | return 0; |
| 90 | } |
| 91 | } else { |
| 92 | buf = stackBuf; |
| 93 | } |
| 94 | |
| 95 | fd = GET_FD(this, fid); |
| 96 | if (fd == -1) { |
| 97 | JNU_ThrowIOException (env, "Stream Closed"); |
| 98 | return -1; |
| 99 | } |
| 100 | |
| 101 | nread = IO_Read(fd, buf, len); |
| 102 | if (nread > 0) { |
| 103 | (*env)->SetByteArrayRegion(env, bytes, off, nread, (jbyte *)buf); |
| 104 | } else if (nread == JVM_IO_ERR) { |
| 105 | JNU_ThrowIOExceptionWithLastError(env, "Read error"); |
| 106 | } else if (nread == JVM_IO_INTR) { /* EOF */ |
| 107 | JNU_ThrowByName(env, "java/io/InterruptedIOException", 0); |
| 108 | } else { /* EOF */ |
| 109 | nread = -1; |
| 110 | } |
| 111 | |
| 112 | if (buf != stackBuf) { |
| 113 | free(buf); |
| 114 | } |
| 115 | return nread; |
| 116 | } |
| 117 | |
| 118 | void |
| 119 | writeSingle(JNIEnv *env, jobject this, jint byte, jfieldID fid) { |
| 120 | char c = byte; |
| 121 | int n; |
| 122 | FD fd = GET_FD(this, fid); |
| 123 | if (fd == -1) { |
| 124 | JNU_ThrowIOException (env, "Stream Closed"); |
| 125 | return; |
| 126 | } |
| 127 | n = IO_Write(fd, &c, 1); |
| 128 | if (n == JVM_IO_ERR) { |
| 129 | JNU_ThrowIOExceptionWithLastError(env, "Write error"); |
| 130 | } else if (n == JVM_IO_INTR) { |
| 131 | JNU_ThrowByName(env, "java/io/InterruptedIOException", 0); |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | void |
| 136 | writeBytes(JNIEnv *env, jobject this, jbyteArray bytes, |
| 137 | jint off, jint len, jfieldID fid) |
| 138 | { |
| 139 | int n, datalen; |
| 140 | char stackBuf[BUF_SIZE]; |
| 141 | char *buf = 0; |
| 142 | FD fd; |
| 143 | |
| 144 | if (IS_NULL(bytes)) { |
| 145 | JNU_ThrowNullPointerException(env, 0); |
| 146 | return; |
| 147 | } |
| 148 | datalen = (*env)->GetArrayLength(env, bytes); |
| 149 | |
| 150 | if ((off < 0) || (off > datalen) || |
| 151 | (len < 0) || ((off + len) > datalen) || ((off + len) < 0)) { |
| 152 | JNU_ThrowByName(env, "java/lang/IndexOutOfBoundsException", 0); |
| 153 | return; |
| 154 | } |
| 155 | |
| 156 | if (len == 0) { |
| 157 | return; |
| 158 | } else if (len > BUF_SIZE) { |
| 159 | buf = malloc(len); |
| 160 | if (buf == 0) { |
| 161 | JNU_ThrowOutOfMemoryError(env, 0); |
| 162 | return; |
| 163 | } |
| 164 | } else { |
| 165 | buf = stackBuf; |
| 166 | } |
| 167 | |
| 168 | (*env)->GetByteArrayRegion(env, bytes, off, len, (jbyte *)buf); |
| 169 | |
| 170 | if (!(*env)->ExceptionOccurred(env)) { |
| 171 | off = 0; |
| 172 | while (len > 0) { |
| 173 | fd = GET_FD(this, fid); |
| 174 | if (fd == -1) { |
| 175 | JNU_ThrowIOException (env, "Stream Closed"); |
| 176 | return; |
| 177 | } |
| 178 | n = IO_Write(fd, buf+off, len); |
| 179 | if (n == JVM_IO_ERR) { |
| 180 | JNU_ThrowIOExceptionWithLastError(env, "Write error"); |
| 181 | break; |
| 182 | } else if (n == JVM_IO_INTR) { |
| 183 | JNU_ThrowByName(env, "java/io/InterruptedIOException", 0); |
| 184 | break; |
| 185 | } |
| 186 | off += n; |
| 187 | len -= n; |
| 188 | } |
| 189 | } |
| 190 | if (buf != stackBuf) { |
| 191 | free(buf); |
| 192 | } |
| 193 | } |
| 194 | |
| 195 | void |
| 196 | throwFileNotFoundException(JNIEnv *env, jstring path) |
| 197 | { |
| 198 | char buf[256]; |
| 199 | int n; |
| 200 | jobject x; |
| 201 | jstring why = NULL; |
| 202 | |
| 203 | n = JVM_GetLastErrorString(buf, sizeof(buf)); |
| 204 | if (n > 0) { |
| 205 | why = JNU_NewStringPlatform(env, buf); |
| 206 | } |
| 207 | x = JNU_NewObjectByName(env, |
| 208 | "java/io/FileNotFoundException", |
| 209 | "(Ljava/lang/String;Ljava/lang/String;)V", |
| 210 | path, why); |
| 211 | if (x != NULL) { |
| 212 | (*env)->Throw(env, x); |
| 213 | } |
| 214 | } |