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src/share/jaxws_classes/com/sun/xml/internal/org/jvnet/staxex/Base64Encoder.java@f50545b5e2f1 (annotated)

src/share/jaxws_classes/com/sun/xml/internal/org/jvnet/staxex/Base64Encoder.java

Tue, 06 Mar 2012 16:09:35 -0800

author

ohair

date

Tue, 06 Mar 2012 16:09:35 -0800

changeset 286

f50545b5e2f1

child 408

b0610cd08440

permissions

-rw-r--r--

7150322: Stop using drop source bundles in jaxws
Reviewed-by: darcy, ohrstrom

ohair@286	1	/*
ohair@286	2	* Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
ohair@286	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
ohair@286	4	*
ohair@286	5	* This code is free software; you can redistribute it and/or modify it
ohair@286	6	* under the terms of the GNU General Public License version 2 only, as
ohair@286	7	* published by the Free Software Foundation. Oracle designates this
ohair@286	8	* particular file as subject to the "Classpath" exception as provided
ohair@286	9	* by Oracle in the LICENSE file that accompanied this code.
ohair@286	10	*
ohair@286	11	* This code is distributed in the hope that it will be useful, but WITHOUT
ohair@286	12	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
ohair@286	13	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
ohair@286	14	* version 2 for more details (a copy is included in the LICENSE file that
ohair@286	15	* accompanied this code).
ohair@286	16	*
ohair@286	17	* You should have received a copy of the GNU General Public License version
ohair@286	18	* 2 along with this work; if not, write to the Free Software Foundation,
ohair@286	19	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
ohair@286	20	*
ohair@286	21	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
ohair@286	22	* or visit www.oracle.com if you need additional information or have any
ohair@286	23	* questions.
ohair@286	24	*/
ohair@286	25
ohair@286	26	package com.sun.xml.internal.org.jvnet.staxex;
ohair@286	27
ohair@286	28	/**
ohair@286	29	* @author Kohsuke Kawaguchi
ohair@286	30	*/
ohair@286	31	class Base64Encoder {
ohair@286	32	private static final char[] encodeMap = initEncodeMap();
ohair@286	33
ohair@286	34	private static char[] initEncodeMap() {
ohair@286	35	char[] map = new char[64];
ohair@286	36	int i;
ohair@286	37	for( i= 0; i<26; i++ ) map[i] = (char)('A'+i);
ohair@286	38	for( i=26; i<52; i++ ) map[i] = (char)('a'+(i-26));
ohair@286	39	for( i=52; i<62; i++ ) map[i] = (char)('0'+(i-52));
ohair@286	40	map[62] = '+';
ohair@286	41	map[63] = '/';
ohair@286	42
ohair@286	43	return map;
ohair@286	44	}
ohair@286	45
ohair@286	46	public static char encode( int i ) {
ohair@286	47	return encodeMap[i&0x3F];
ohair@286	48	}
ohair@286	49
ohair@286	50	public static byte encodeByte( int i ) {
ohair@286	51	return (byte)encodeMap[i&0x3F];
ohair@286	52	}
ohair@286	53
ohair@286	54	public static String print(byte[] input, int offset, int len) {
ohair@286	55	char[] buf = new char[((len+2)/3)*4];
ohair@286	56	int ptr = print(input,offset,len,buf,0);
ohair@286	57	assert ptr==buf.length;
ohair@286	58	return new String(buf);
ohair@286	59	}
ohair@286	60
ohair@286	61	/**
ohair@286	62	* Encodes a byte array into a char array by doing base64 encoding.
ohair@286	63	*
ohair@286	64	* The caller must supply a big enough buffer.
ohair@286	65	*
ohair@286	66	* @return
ohair@286	67	* the value of {@code ptr+((len+2)/3)*4}, which is the new offset
ohair@286	68	* in the output buffer where the further bytes should be placed.
ohair@286	69	*/
ohair@286	70	public static int print(byte[] input, int offset, int len, char[] buf, int ptr) {
ohair@286	71	for( int i=offset; i<len; i+=3 ) {
ohair@286	72	switch( len-i ) {
ohair@286	73	case 1:
ohair@286	74	buf[ptr++] = encode(input[i]>>2);
ohair@286	75	buf[ptr++] = encode(((input[i])&0x3)<<4);
ohair@286	76	buf[ptr++] = '=';
ohair@286	77	buf[ptr++] = '=';
ohair@286	78	break;
ohair@286	79	case 2:
ohair@286	80	buf[ptr++] = encode(input[i]>>2);
ohair@286	81	buf[ptr++] = encode(
ohair@286	82	((input[i]&0x3)<<4) |
ohair@286	83	((input[i+1]>>4)&0xF));
ohair@286	84	buf[ptr++] = encode((input[i+1]&0xF)<<2);
ohair@286	85	buf[ptr++] = '=';
ohair@286	86	break;
ohair@286	87	default:
ohair@286	88	buf[ptr++] = encode(input[i]>>2);
ohair@286	89	buf[ptr++] = encode(
ohair@286	90	((input[i]&0x3)<<4) |
ohair@286	91	((input[i+1]>>4)&0xF));
ohair@286	92	buf[ptr++] = encode(
ohair@286	93	((input[i+1]&0xF)<<2)|
ohair@286	94	((input[i+2]>>6)&0x3));
ohair@286	95	buf[ptr++] = encode(input[i+2]&0x3F);
ohair@286	96	break;
ohair@286	97	}
ohair@286	98	}
ohair@286	99	return ptr;
ohair@286	100	}
ohair@286	101	}