001/* 002 * Copyright (C) 2009-2020 the original author(s). 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016package org.fusesource.jansi.io; 017 018import java.io.FilterOutputStream; 019import java.io.IOException; 020import java.io.OutputStream; 021 022/** 023 * A simple buffering output stream with no synchronization. 024 */ 025public class FastBufferedOutputStream extends FilterOutputStream { 026 027 protected final byte buf[] = new byte[8192]; 028 protected int count; 029 030 public FastBufferedOutputStream(OutputStream out) { 031 super(out); 032 } 033 034 @Override 035 public void write(int b) throws IOException { 036 if (count >= buf.length) { 037 flushBuffer(); 038 } 039 buf[count++] = (byte) b; 040 } 041 042 @Override 043 public void write(byte b[], int off, int len) throws IOException { 044 if (len >= buf.length) { 045 flushBuffer(); 046 out.write(b, off, len); 047 return; 048 } 049 if (len > buf.length - count) { 050 flushBuffer(); 051 } 052 System.arraycopy(b, off, buf, count, len); 053 count += len; 054 } 055 056 private void flushBuffer() throws IOException { 057 if (count > 0) { 058 out.write(buf, 0, count); 059 count = 0; 060 } 061 } 062 063 @Override 064 public void flush() throws IOException { 065 flushBuffer(); 066 out.flush(); 067 } 068 069}