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RandomAccessFile

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This commit is contained in:
Alexey Pelykh
2013-01-22 21:10:16 +02:00
parent d6aff87ef9
commit f1b2b3f78d
2 changed files with 90 additions and 136 deletions
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73
classpath/java/io/RandomAccessFile.java
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@ -10,6 +10,8 @@
package java.io;
import java.lang.IllegalArgumentException;
public class RandomAccessFile {
private long peer;
private File file;
@ -61,27 +63,62 @@ public class RandomAccessFile {
this.position = position + count;
return count;
}
public void readFully(byte[] buffer, int offset, int length)
throws IOException
{
if (peer == 0) throw new IOException();
if (length == 0) return;
if (position + length > this.length) {
if (position + length > length()) throw new EOFException();
}
if (offset < 0 || offset + length > buffer.length)
public int read(byte b[], int off, int len) throws IOException {
if(b == null)
throw new IllegalArgumentException();
if (peer == 0)
throw new IOException();
if(len == 0)
return 0;
if (position + len > this.length)
throw new EOFException();
if (off < 0 || off + len > b.length)
throw new ArrayIndexOutOfBoundsException();
copy(peer, position, buffer, offset, length);
position += length;
int bytesRead = readBytes(peer, position, b, off, len);
position += bytesRead;
return bytesRead;
}
public int read(byte b[]) throws IOException {
if(b == null)
throw new IllegalArgumentException();
if (peer == 0)
throw new IOException();
if(b.length == 0)
return 0;
if (position + b.length > this.length)
throw new EOFException();
int bytesRead = readBytes(peer, position, b, 0, b.length);
position += bytesRead;
return bytesRead;
}
private static native void copy(long peer, long position, byte[] buffer,
public void readFully(byte b[], int off, int len) throws IOException {
if(b == null)
throw new IllegalArgumentException();
if (peer == 0)
throw new IOException();
if(len == 0)
return;
if (position + len > this.length)
throw new EOFException();
if (off < 0 || off + len > b.length)
throw new ArrayIndexOutOfBoundsException();
int n = 0;
do {
int count = readBytes(peer, position, b, off + n, len - n);
if (count < 0)
throw new EOFException();
n += count;
} while (n < len);
}
public void readFully(byte b[]) throws IOException {
readFully(b, 0, b.length);
}
private static native int readBytes(long peer, long position, byte[] buffer,
int offset, int length);
public void close() throws IOException {