JNI: Add BufferInputStream, BufferOutputStream.

These are meant to make it easy to interact with mupdf's Buffer
object in a normal Java fashion.

3 files changed, 145 insertions, 0 deletions

diff --git a/platform/java/mupdf_native.h b/platform/java/mupdf_native.h
index e3902a21..3756eae9 100644
--- a/platform/java/mupdf_native.h
+++ b/platform/java/mupdf_native.h
@@ -184,6 +184,30 @@ JNIEXPORT void JNICALL Java_com_artifex_mupdf_fitz_Buffer_save
 }
 #endif
 #endif
+/* Header for class com_artifex_mupdf_fitz_BufferInputStream */
+
+#ifndef _Included_com_artifex_mupdf_fitz_BufferInputStream
+#define _Included_com_artifex_mupdf_fitz_BufferInputStream
+#ifdef __cplusplus
+extern "C" {
+#endif
+#undef com_artifex_mupdf_fitz_BufferInputStream_MAX_SKIP_BUFFER_SIZE
+#define com_artifex_mupdf_fitz_BufferInputStream_MAX_SKIP_BUFFER_SIZE 2048L
+#ifdef __cplusplus
+}
+#endif
+#endif
+/* Header for class com_artifex_mupdf_fitz_BufferOutputStream */
+
+#ifndef _Included_com_artifex_mupdf_fitz_BufferOutputStream
+#define _Included_com_artifex_mupdf_fitz_BufferOutputStream
+#ifdef __cplusplus
+extern "C" {
+#endif
+#ifdef __cplusplus
+}
+#endif
+#endif
 /* Header for class com_artifex_mupdf_fitz_ColorSpace */
 
 #ifndef _Included_com_artifex_mupdf_fitz_ColorSpace
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;
+	}
+}
diff --git a/platform/java/src/com/artifex/mupdf/fitz/BufferOutputStream.java b/platform/java/src/com/artifex/mupdf/fitz/BufferOutputStream.java
new file mode 100644
index 00000000..ec87db0c
--- /dev/null
+++ b/platform/java/src/com/artifex/mupdf/fitz/BufferOutputStream.java
@@ -0,0 +1,66 @@
+package com.artifex.mupdf.fitz;
+
+import java.io.IOException;
+import java.io.OutputStream;
+
+public class BufferOutputStream extends OutputStream
+{
+	protected Buffer buffer;
+	protected int position;
+	protected int resetPosition;
+
+	public BufferOutputStream(Buffer buffer) {
+		super();
+		this.buffer = buffer;
+		this.position = 0;
+	}
+
+	public void write(byte[] b) {
+		buffer.writeBytes(b);
+	}
+
+	public void write(byte[] b, int off, int len) {
+		buffer.writeBytesFrom(b, off, len);
+	}
+
+	public void write(int b) {
+		buffer.writeByte((byte) b);
+	}
+
+	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;
+	}
+}