org.wildfly.common.iteration.LittleEndianBase64DecodingByteIterator Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
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/*
* JBoss, Home of Professional Open Source.
* Copyright 2017 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.wildfly.common.iteration;
import static org.wildfly.common._private.CommonMessages.msg;
import org.wildfly.common.codec.Base64Alphabet;
/**
*/
final class LittleEndianBase64DecodingByteIterator extends Base64DecodingByteIterator {
private final Base64Alphabet alphabet;
LittleEndianBase64DecodingByteIterator(final CodePointIterator iter, final boolean requirePadding, final Base64Alphabet alphabet) {
super(iter, requirePadding);
this.alphabet = alphabet;
}
int calc0(final int b0, final int b1) {
final int d0 = alphabet.decode(b0);
final int d1 = alphabet.decode(b1);
// d0 = r0[5..0]
// d1 = r1[3..0] + r0[7..6]
if (d0 == - 1 || d1 == - 1) throw msg.invalidBase64Character();
return (d0 | d1 << 6) & 0xff;
}
int calc1(final int b1, final int b2) {
final int d1 = alphabet.decode(b1);
final int d2 = alphabet.decode(b2);
// d1 = r1[3..0] + r0[7..6]
// d2 = r2[1..0] + r1[7..4]
if (d1 == - 1 || d2 == - 1) throw msg.invalidBase64Character();
return (d1 >> 2 | d2 << 4) & 0xff;
}
int calc2(final int b2, final int b3) {
final int d2 = alphabet.decode(b2);
final int d3 = alphabet.decode(b3);
// d2 = r2[1..0] + r1[7..4]
// d3 = r2[7..2]
if (d2 == - 1 || d3 == - 1) throw msg.invalidBase64Character();
return (d2 >> 4 | d3 << 2) & 0xff;
}
}