001/* 002 * SVG Salamander 003 * Copyright (c) 2004, Mark McKay 004 * All rights reserved. 005 * 006 * Redistribution and use in source and binary forms, with or 007 * without modification, are permitted provided that the following 008 * conditions are met: 009 * 010 * - Redistributions of source code must retain the above 011 * copyright notice, this list of conditions and the following 012 * disclaimer. 013 * - Redistributions in binary form must reproduce the above 014 * copyright notice, this list of conditions and the following 015 * disclaimer in the documentation and/or other materials 016 * provided with the distribution. 017 * 018 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 019 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 020 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 021 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 022 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 023 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 024 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 025 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 026 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 027 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 028 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 029 * OF THE POSSIBILITY OF SUCH DAMAGE. 030 * 031 * Mark McKay can be contacted at mark@kitfox.com. Salamander and other 032 * projects can be found at http://www.kitfox.com 033 */ 034 035package com.kitfox.svg.xml; 036 037import java.io.FilterOutputStream; 038import java.io.IOException; 039import java.io.OutputStream; 040 041/** 042 * 043 * @author kitfox 044 */ 045public class Base64OutputStream extends FilterOutputStream 046{ 047 int buf; 048 int numBytes; 049 int numChunks; 050 051 public Base64OutputStream(OutputStream out) 052 { 053 super(out); 054 } 055 056 public void flush() throws IOException 057 { 058 out.flush(); 059 } 060 061 public void close() throws IOException 062 { 063 switch (numBytes) 064 { 065 case 1: 066 buf <<= 4; 067 out.write(getBase64Byte(1)); 068 out.write(getBase64Byte(0)); 069 out.write('='); 070 out.write('='); 071 break; 072 case 2: 073 buf <<= 2; 074 out.write(getBase64Byte(2)); 075 out.write(getBase64Byte(1)); 076 out.write(getBase64Byte(0)); 077 out.write('='); 078 break; 079 case 3: 080 out.write(getBase64Byte(3)); 081 out.write(getBase64Byte(2)); 082 out.write(getBase64Byte(1)); 083 out.write(getBase64Byte(0)); 084 break; 085 default: 086 assert false; 087 } 088 089 out.close(); 090 } 091 092 public void write(int b) throws IOException 093 { 094 buf = (buf << 8) | (0xff & b); 095 numBytes++; 096 097 if (numBytes == 3) 098 { 099 out.write(getBase64Byte(3)); 100 out.write(getBase64Byte(2)); 101 out.write(getBase64Byte(1)); 102 out.write(getBase64Byte(0)); 103 104 numBytes = 0; 105 numChunks++; 106 if (numChunks == 16) 107 { 108// out.write('\r'); 109// out.write('\n'); 110 numChunks = 0; 111 } 112 } 113 } 114 115 public byte getBase64Byte(int index) 116 { 117 return Base64Util.encodeByte((buf >> (index * 6)) & 0x3f); 118 } 119}