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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.commons.compress.archivers.zip;
import java.io.IOException;
import java.io.InputStream;
import org.apache.commons.compress.utils.BitInputStream;
import java.nio.ByteOrder;
/**
* Iterates over the bits of an InputStream. For each byte the bits
* are read from the right to the left.
*
* @since 1.7
*/
class BitStream extends BitInputStream {
BitStream(final InputStream in) {
super(in, ByteOrder.LITTLE_ENDIAN);
}
/**
* Returns the next bit.
*
* @return The next bit (0 or 1) or -1 if the end of the stream has been reached
*/
int nextBit() throws IOException {
return (int) readBits(1);
}
/**
* Returns the integer value formed by the n next bits (up to 8 bits).
*
* @param n the number of bits read (up to 8)
* @return The value formed by the n bits, or -1 if the end of the stream has been reached
*/
long nextBits(final int n) throws IOException {
return readBits(n);
}
int nextByte() throws IOException {
return (int) readBits(8);
}
}
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