| /* |
| * UncompressedLZMA2OutputStream |
| * |
| * Author: Lasse Collin <lasse.collin@tukaani.org> |
| * |
| * This file has been put into the public domain. |
| * You can do whatever you want with this file. |
| */ |
| |
| package org.tukaani.xz; |
| |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| |
| class UncompressedLZMA2OutputStream extends FinishableOutputStream { |
| private FinishableOutputStream out; |
| private final DataOutputStream outData; |
| |
| private final byte[] uncompBuf |
| = new byte[LZMA2OutputStream.COMPRESSED_SIZE_MAX]; |
| private int uncompPos = 0; |
| private boolean dictResetNeeded = true; |
| |
| private boolean finished = false; |
| private IOException exception = null; |
| |
| private final byte[] tempBuf = new byte[1]; |
| |
| static int getMemoryUsage() { |
| // uncompBuf + a little extra |
| return 70; |
| } |
| |
| UncompressedLZMA2OutputStream(FinishableOutputStream out) { |
| if (out == null) |
| throw new NullPointerException(); |
| |
| this.out = out; |
| outData = new DataOutputStream(out); |
| } |
| |
| public void write(int b) throws IOException { |
| tempBuf[0] = (byte)b; |
| write(tempBuf, 0, 1); |
| } |
| |
| public void write(byte[] buf, int off, int len) throws IOException { |
| if (off < 0 || len < 0 || off + len < 0 || off + len > buf.length) |
| throw new IndexOutOfBoundsException(); |
| |
| if (exception != null) |
| throw exception; |
| |
| if (finished) |
| throw new XZIOException("Stream finished or closed"); |
| |
| try { |
| while (len > 0) { |
| int copySize = Math.min(uncompBuf.length - uncompPos, len); |
| System.arraycopy(buf, off, uncompBuf, uncompPos, copySize); |
| len -= copySize; |
| uncompPos += copySize; |
| |
| if (uncompPos == uncompBuf.length) |
| writeChunk(); |
| } |
| } catch (IOException e) { |
| exception = e; |
| throw e; |
| } |
| } |
| |
| private void writeChunk() throws IOException { |
| outData.writeByte(dictResetNeeded ? 0x01 : 0x02); |
| outData.writeShort(uncompPos - 1); |
| outData.write(uncompBuf, 0, uncompPos); |
| uncompPos = 0; |
| dictResetNeeded = false; |
| } |
| |
| private void writeEndMarker() throws IOException { |
| if (exception != null) |
| throw exception; |
| |
| if (finished) |
| throw new XZIOException("Stream finished or closed"); |
| |
| try { |
| if (uncompPos > 0) |
| writeChunk(); |
| |
| out.write(0x00); |
| } catch (IOException e) { |
| exception = e; |
| throw e; |
| } |
| } |
| |
| public void flush() throws IOException { |
| if (exception != null) |
| throw exception; |
| |
| if (finished) |
| throw new XZIOException("Stream finished or closed"); |
| |
| try { |
| if (uncompPos > 0) |
| writeChunk(); |
| |
| out.flush(); |
| } catch (IOException e) { |
| exception = e; |
| throw e; |
| } |
| } |
| |
| public void finish() throws IOException { |
| if (!finished) { |
| writeEndMarker(); |
| |
| try { |
| out.finish(); |
| } catch (IOException e) { |
| exception = e; |
| throw e; |
| } |
| |
| finished = true; |
| } |
| } |
| |
| public void close() throws IOException { |
| if (out != null) { |
| if (!finished) { |
| try { |
| writeEndMarker(); |
| } catch (IOException e) {} |
| } |
| |
| try { |
| out.close(); |
| } catch (IOException e) { |
| if (exception == null) |
| exception = e; |
| } |
| |
| out = null; |
| } |
| |
| if (exception != null) |
| throw exception; |
| } |
| } |