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package com.artifex.mupdf.fitz;
import java.io.IOException;
import java.io.InputStream;
public class BufferInputStream extends InputStream
{
protected Buffer buffer;
protected int position;
protected int resetPosition;
public BufferInputStream(Buffer buffer) {
super();
this.buffer = buffer;
this.position = 0;
this.resetPosition = -1;
}
public int available() {
return buffer.getLength();
}
public void mark(int readlimit) {
resetPosition = position;
}
public boolean markSupported() {
return true;
}
public int read() {
int c = buffer.readByte(position);
if (c >= 0)
position++;
return c;
}
public int read(byte[] b) {
int n = buffer.readBytes(position, b);
if (n >= 0)
position += n;
return n;
}
public int read(byte[] b, int off, int len) {
int n = buffer.readBytesInto(position, b, off, len);
if (n >= 0)
position += n;
return n;
}
public void reset() throws IOException {
if (resetPosition < 0)
throw new IOException("cannot reset because mark never set");
if (resetPosition >= buffer.getLength())
throw new IOException("cannot reset because mark set outside of buffer");
position = resetPosition;
}
}
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