| /* |
| * Copyright 1994-2007 Sun Microsystems, Inc. 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. Sun designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| */ |
| |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "jni.h" |
| #include "jni_util.h" |
| #include "jvm.h" |
| #include "io_util.h" |
| #include "io_util_md.h" |
| |
| /* IO helper functions */ |
| |
| int |
| readSingle(JNIEnv *env, jobject this, jfieldID fid) { |
| int nread; |
| char ret; |
| FD fd = GET_FD(this, fid); |
| if (fd == -1) { |
| JNU_ThrowIOException (env, "Stream Closed"); |
| return -1; |
| } |
| nread = IO_Read(fd, &ret, 1); |
| if (nread == 0) { /* EOF */ |
| return -1; |
| } else if (nread == JVM_IO_ERR) { /* error */ |
| JNU_ThrowIOExceptionWithLastError(env, "Read error"); |
| } else if (nread == JVM_IO_INTR) { |
| JNU_ThrowByName(env, "java/io/InterruptedIOException", 0); |
| } |
| return ret & 0xFF; |
| } |
| |
| /* The maximum size of a stack-allocated buffer. |
| */ |
| #define BUF_SIZE 8192 |
| |
| |
| int |
| readBytes(JNIEnv *env, jobject this, jbyteArray bytes, |
| jint off, jint len, jfieldID fid) |
| { |
| int nread, datalen; |
| char stackBuf[BUF_SIZE]; |
| char *buf = 0; |
| FD fd; |
| |
| if (IS_NULL(bytes)) { |
| JNU_ThrowNullPointerException(env, 0); |
| return -1; |
| } |
| datalen = (*env)->GetArrayLength(env, bytes); |
| |
| if ((off < 0) || (off > datalen) || |
| (len < 0) || ((off + len) > datalen) || ((off + len) < 0)) { |
| JNU_ThrowByName(env, "java/lang/IndexOutOfBoundsException", 0); |
| return -1; |
| } |
| |
| if (len == 0) { |
| return 0; |
| } else if (len > BUF_SIZE) { |
| buf = malloc(len); |
| if (buf == 0) { |
| JNU_ThrowOutOfMemoryError(env, 0); |
| return 0; |
| } |
| } else { |
| buf = stackBuf; |
| } |
| |
| fd = GET_FD(this, fid); |
| if (fd == -1) { |
| JNU_ThrowIOException (env, "Stream Closed"); |
| return -1; |
| } |
| |
| nread = IO_Read(fd, buf, len); |
| if (nread > 0) { |
| (*env)->SetByteArrayRegion(env, bytes, off, nread, (jbyte *)buf); |
| } else if (nread == JVM_IO_ERR) { |
| JNU_ThrowIOExceptionWithLastError(env, "Read error"); |
| } else if (nread == JVM_IO_INTR) { /* EOF */ |
| JNU_ThrowByName(env, "java/io/InterruptedIOException", 0); |
| } else { /* EOF */ |
| nread = -1; |
| } |
| |
| if (buf != stackBuf) { |
| free(buf); |
| } |
| return nread; |
| } |
| |
| void |
| writeSingle(JNIEnv *env, jobject this, jint byte, jfieldID fid) { |
| char c = byte; |
| int n; |
| FD fd = GET_FD(this, fid); |
| if (fd == -1) { |
| JNU_ThrowIOException (env, "Stream Closed"); |
| return; |
| } |
| n = IO_Write(fd, &c, 1); |
| if (n == JVM_IO_ERR) { |
| JNU_ThrowIOExceptionWithLastError(env, "Write error"); |
| } else if (n == JVM_IO_INTR) { |
| JNU_ThrowByName(env, "java/io/InterruptedIOException", 0); |
| } |
| } |
| |
| void |
| writeBytes(JNIEnv *env, jobject this, jbyteArray bytes, |
| jint off, jint len, jfieldID fid) |
| { |
| int n, datalen; |
| char stackBuf[BUF_SIZE]; |
| char *buf = 0; |
| FD fd; |
| |
| if (IS_NULL(bytes)) { |
| JNU_ThrowNullPointerException(env, 0); |
| return; |
| } |
| datalen = (*env)->GetArrayLength(env, bytes); |
| |
| if ((off < 0) || (off > datalen) || |
| (len < 0) || ((off + len) > datalen) || ((off + len) < 0)) { |
| JNU_ThrowByName(env, "java/lang/IndexOutOfBoundsException", 0); |
| return; |
| } |
| |
| if (len == 0) { |
| return; |
| } else if (len > BUF_SIZE) { |
| buf = malloc(len); |
| if (buf == 0) { |
| JNU_ThrowOutOfMemoryError(env, 0); |
| return; |
| } |
| } else { |
| buf = stackBuf; |
| } |
| |
| (*env)->GetByteArrayRegion(env, bytes, off, len, (jbyte *)buf); |
| |
| if (!(*env)->ExceptionOccurred(env)) { |
| off = 0; |
| while (len > 0) { |
| fd = GET_FD(this, fid); |
| if (fd == -1) { |
| JNU_ThrowIOException (env, "Stream Closed"); |
| return; |
| } |
| n = IO_Write(fd, buf+off, len); |
| if (n == JVM_IO_ERR) { |
| JNU_ThrowIOExceptionWithLastError(env, "Write error"); |
| break; |
| } else if (n == JVM_IO_INTR) { |
| JNU_ThrowByName(env, "java/io/InterruptedIOException", 0); |
| break; |
| } |
| off += n; |
| len -= n; |
| } |
| } |
| if (buf != stackBuf) { |
| free(buf); |
| } |
| } |
| |
| void |
| throwFileNotFoundException(JNIEnv *env, jstring path) |
| { |
| char buf[256]; |
| int n; |
| jobject x; |
| jstring why = NULL; |
| |
| n = JVM_GetLastErrorString(buf, sizeof(buf)); |
| if (n > 0) { |
| why = JNU_NewStringPlatform(env, buf); |
| } |
| x = JNU_NewObjectByName(env, |
| "java/io/FileNotFoundException", |
| "(Ljava/lang/String;Ljava/lang/String;)V", |
| path, why); |
| if (x != NULL) { |
| (*env)->Throw(env, x); |
| } |
| } |