org.wildfly.common.iteration.BigEndianBase32EncodingIterator Maven / Gradle / Ivy
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* 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 org.wildfly.common.codec.Base32Alphabet;
/**
*/
final class BigEndianBase32EncodingIterator extends Base32EncodingCodePointIterator {
private final Base32Alphabet alphabet;
BigEndianBase32EncodingIterator(final ByteIterator iter, final boolean addPadding, final Base32Alphabet alphabet) {
super(iter, addPadding);
this.alphabet = alphabet;
}
int calc0(final int b0) {
// d0 = r0[7..3]
return alphabet.encode((b0 >> 3) & 0x1f);
}
int calc1(final int b0, final int b1) {
// d1 = r0[2..0] + r1[7..6]
return alphabet.encode((b0 << 2 | b1 >> 6) & 0x1f);
}
int calc2(final int b1) {
// d2 = r1[5..1]
return alphabet.encode((b1 >> 1) & 0x1f);
}
int calc3(final int b1, final int b2) {
// d3 = r1[0] + r2[7..4]
return alphabet.encode((b1 << 4 | b2 >> 4) & 0x1f);
}
int calc4(final int b2, final int b3) {
// d4 = r2[3..0] + r3[7]
return alphabet.encode((b2 << 1 | b3 >> 7) & 0x1f);
}
int calc5(final int b3) {
// d5 = r3[6..2]
return alphabet.encode((b3 >> 2) & 0x1f);
}
int calc6(final int b3, final int b4) {
// d6 = r3[1..0] + r4[7..5]
return alphabet.encode((b3 << 3 | b4 >> 5) & 0x1f);
}
int calc7(final int b4) {
// d7 = r4[4..0]
return alphabet.encode(b4 & 0x1f);
}
}