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src/share/jaxws_classes/com/sun/xml/internal/org/jvnet/staxex/Base64Encoder.java@7166269ef0f1 (annotated)

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

Sat, 07 Nov 2020 10:30:02 +0800

author

aoqi

date

Sat, 07 Nov 2020 10:30:02 +0800

changeset 1921

7166269ef0f1

parent 637

9c07ef4934dd

permissions

-rw-r--r--

Added tag mips-jdk8u275-b01 for changeset fdbe50121f48

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation. Oracle designates this
aoqi@0	8	* particular file as subject to the "Classpath" exception as provided
aoqi@0	9	* by Oracle in the LICENSE file that accompanied this code.
aoqi@0	10	*
aoqi@0	11	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	12	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	13	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	14	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	15	* accompanied this code).
aoqi@0	16	*
aoqi@0	17	* You should have received a copy of the GNU General Public License version
aoqi@0	18	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	19	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	20	*
aoqi@0	21	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	22	* or visit www.oracle.com if you need additional information or have any
aoqi@0	23	* questions.
aoqi@0	24	*/
aoqi@0	25
aoqi@0	26	package com.sun.xml.internal.org.jvnet.staxex;
aoqi@0	27
aoqi@0	28	/**
aoqi@0	29	* @author Kohsuke Kawaguchi
aoqi@0	30	*/
aoqi@0	31	class Base64Encoder {
aoqi@0	32	private static final char[] encodeMap = initEncodeMap();
aoqi@0	33
aoqi@0	34	private static char[] initEncodeMap() {
aoqi@0	35	char[] map = new char[64];
aoqi@0	36	int i;
aoqi@0	37	for( i= 0; i<26; i++ ) map[i] = (char)('A'+i);
aoqi@0	38	for( i=26; i<52; i++ ) map[i] = (char)('a'+(i-26));
aoqi@0	39	for( i=52; i<62; i++ ) map[i] = (char)('0'+(i-52));
aoqi@0	40	map[62] = '+';
aoqi@0	41	map[63] = '/';
aoqi@0	42
aoqi@0	43	return map;
aoqi@0	44	}
aoqi@0	45
aoqi@0	46	public static char encode( int i ) {
aoqi@0	47	return encodeMap[i&0x3F];
aoqi@0	48	}
aoqi@0	49
aoqi@0	50	public static byte encodeByte( int i ) {
aoqi@0	51	return (byte)encodeMap[i&0x3F];
aoqi@0	52	}
aoqi@0	53
aoqi@0	54	public static String print(byte[] input, int offset, int len) {
aoqi@0	55	char[] buf = new char[((len+2)/3)*4];
aoqi@0	56	int ptr = print(input,offset,len,buf,0);
aoqi@0	57	assert ptr==buf.length;
aoqi@0	58	return new String(buf);
aoqi@0	59	}
aoqi@0	60
aoqi@0	61	/**
aoqi@0	62	* Encodes a byte array into a char array by doing base64 encoding.
aoqi@0	63	*
aoqi@0	64	* The caller must supply a big enough buffer.
aoqi@0	65	*
aoqi@0	66	* @return
aoqi@0	67	* the value of {@code ptr+((len+2)/3)*4}, which is the new offset
aoqi@0	68	* in the output buffer where the further bytes should be placed.
aoqi@0	69	*/
aoqi@0	70	public static int print(byte[] input, int offset, int len, char[] buf, int ptr) {
aoqi@0	71	for( int i=offset; i<len; i+=3 ) {
aoqi@0	72	switch( len-i ) {
aoqi@0	73	case 1:
aoqi@0	74	buf[ptr++] = encode(input[i]>>2);
aoqi@0	75	buf[ptr++] = encode(((input[i])&0x3)<<4);
aoqi@0	76	buf[ptr++] = '=';
aoqi@0	77	buf[ptr++] = '=';
aoqi@0	78	break;
aoqi@0	79	case 2:
aoqi@0	80	buf[ptr++] = encode(input[i]>>2);
aoqi@0	81	buf[ptr++] = encode(
aoqi@0	82	((input[i]&0x3)<<4) |
aoqi@0	83	((input[i+1]>>4)&0xF));
aoqi@0	84	buf[ptr++] = encode((input[i+1]&0xF)<<2);
aoqi@0	85	buf[ptr++] = '=';
aoqi@0	86	break;
aoqi@0	87	default:
aoqi@0	88	buf[ptr++] = encode(input[i]>>2);
aoqi@0	89	buf[ptr++] = encode(
aoqi@0	90	((input[i]&0x3)<<4) |
aoqi@0	91	((input[i+1]>>4)&0xF));
aoqi@0	92	buf[ptr++] = encode(
aoqi@0	93	((input[i+1]&0xF)<<2)|
aoqi@0	94	((input[i+2]>>6)&0x3));
aoqi@0	95	buf[ptr++] = encode(input[i+2]&0x3F);
aoqi@0	96	break;
aoqi@0	97	}
aoqi@0	98	}
aoqi@0	99	return ptr;
aoqi@0	100	}
aoqi@0	101	}