1 files changed, 55 insertions, 0 deletions
diff --git a/platform/java/src/com/artifex/mupdf/fitz/BufferInputStream.java b/platform/java/src/com/artifex/mupdf/fitz/BufferInputStream.java
new file mode 100644
index 00000000..6a03dc00
--- /dev/null
+++ b/platform/java/src/com/artifex/mupdf/fitz/BufferInputStream.java
@@ -0,0 +1,55 @@
+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() {
+		return buffer.readByte(position++);
+	}
+
+	public int read(byte[] b) {
+		int n = buffer.readBytes(position, b);
+		position += n;
+		return n;
+	}
+
+	public int read(byte[] b, int off, int len) {
+		int n = buffer.readBytesInto(position, b, off, len);
+		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;
+	}
+}