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A library for reading, writing and manipulating bits.

There is a newer version: 2.1.0

/*
 * Copyright 2011 Tom Gibara
 *
 * 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 com.tomgibara.bits;

//TODO implement transfer methods that move bits from readers to writers and make public
class BitStreams {

	private BitStreams() {}

	// package scoped

	static boolean isSameBits(BitReader r, BitReader s) {
		int rBit;
		int sBit;
		do {
			try {
				rBit = r.readBit();
			} catch (EndOfBitStreamException e) {
				rBit = -1;
			}
			try {
				sBit = s.readBit();
			} catch (EndOfBitStreamException e) {
				sBit = -1;
			}
			if (rBit != sBit) return false;
		} while (rBit != -1);
		return true;
	}

	static String bitsToString(BitReader reader) {
		StringBuilder sb = new StringBuilder();
		while (true) {
			try {
				sb.append(reader.readBoolean() ? '1' : '0');
			} catch (EndOfBitStreamException e) {
				return sb.toString();
			}
		}
	}

	static long countBits(BitReader reader) {
		return reader.skipBits(Long.MAX_VALUE);
	}

}