/*
 * Copyright (c) 2003, 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 <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>

#include "jni.h"
#include "jni_util.h"
#include "jvm.h"
#include "io_util.h"
#include "io_util_md.h"

#include "java_io_RandomAccessFile.h"

extern jfieldID raf_fd; /* id for jobject 'fd' in java.io.RandomAccessFile */
extern jfieldID raf_pgsz; /* id for jobject 'fd' in java.io.RandomAccessFile */

/*********************************************************************
 * Platform specific implementation of input stream native methods
 */

JNIEXPORT void JNICALL
Java_java_io_RandomAccessFile_close0(JNIEnv *env, jobject this) {
    fileClose(env, this, raf_fd);
}

JNIEXPORT void JNICALL
Java_java_io_RandomAccessFile_open0(JNIEnv *env,
                                    jobject this, jstring path, jint mode)
{
    int flags = 0;
    if (mode & java_io_RandomAccessFile_O_RDONLY) {
        flags = O_RDONLY;
        if (mode & java_io_RandomAccessFile_O_DIRECT)
            flags |= O_DIRECT;
    }
    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;
        else if (mode & java_io_RandomAccessFile_O_DIRECT)
            flags |= O_DIRECT;
    }
    fileOpen(env, this, path, raf_fd, flags);
}

JNIEXPORT jlong JNICALL
Java_java_io_RandomAccessFile_getCurrentLocation0(JNIEnv *env, jobject this) {

    FD fd;

    fd = GET_FD(this, raf_fd);
    if (fd == -1) {
        JNU_ThrowIOException(env, "Stream Closed");
        return -1;
    }
    jlong currentLocation = IO_Lseek(fd, 0, SEEK_CUR);
    if (currentLocation == -1) {
        JNU_ThrowIOExceptionWithLastError(env, "Seek failed");
    }
    return currentLocation;
}

JNIEXPORT jint JNICALL
Java_java_io_RandomAccessFile_getPageSize0(JNIEnv *env, jobject this) {
    return getpagesize();
}

JNIEXPORT jint JNICALL
Java_java_io_RandomAccessFile_readBytesD(JNIEnv *env,
    jobject this, jbyteArray bytes, jint off, jint len) {
    return readBytesD(env, this, bytes, off, len, raf_fd, raf_pgsz);
}

JNIEXPORT void JNICALL
Java_java_io_RandomAccessFile_writeBytesD(JNIEnv *env,
    jobject this, jbyteArray bytes, jint off, jint len) {
    writeBytesD(env, this, bytes, off, len, JNI_FALSE, raf_fd, raf_pgsz);
}