761417898 commented on code in PR #560: URL: https://github.com/apache/tsfile/pull/560#discussion_r2250958200
########## java/tsfile/src/main/java/org/apache/tsfile/encoding/encoder/CamelEncoder.java: ########## @@ -0,0 +1,297 @@ +/* + * 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.tsfile.encoding.encoder; + +import org.apache.tsfile.common.bitStream.BitOutputStream; +import org.apache.tsfile.file.metadata.enums.TSEncoding; +import org.apache.tsfile.utils.ReadWriteForEncodingUtils; + +import java.io.ByteArrayOutputStream; +import java.io.IOException; + +public class CamelEncoder extends Encoder { + private final GorillaEncoder gorillaEncoder; + + // === Constants for encoding === + private static final int BITS_FOR_SIGN = 1; + private static final int BITS_FOR_TYPE = 1; + private static final int BITS_FOR_FIRST_VALUE = 64; + private static final int BITS_FOR_LEADING_ZEROS = 6; + private static final int BITS_FOR_SIGNIFICANT_BITS = 6; + private static final int BITS_FOR_DECIMAL_COUNT = 4; + private static final int DOUBLE_TOTAL_BITS = 64; + private static final int DOUBLE_MANTISSA_BITS = 52; + private static final int DECIMAL_MAX_COUNT = 10; + + // === Camel state === + private long storedVal = 0; + private boolean isFirst = true; + private int decimalCount = 0; + long previousValue = 0; + private boolean hasPending = false; // guard for empty or duplicate flush + + // === Precomputed tables === + public static final long[] powers = new long[DECIMAL_MAX_COUNT]; + public static final long[] threshold = new long[DECIMAL_MAX_COUNT]; + public static final int[] mValueBits = new int[DECIMAL_MAX_COUNT]; + + private final BitOutputStream out; + private final ByteArrayOutputStream baos = new ByteArrayOutputStream(); + + public CamelEncoder() { + super(TSEncoding.CAMEL); + for (int l = 1; l <= DECIMAL_MAX_COUNT; l++) { + int idx = l - 1; + powers[idx] = (long) Math.pow(10, l); + long divisor = 1L << l; + threshold[idx] = powers[idx] / divisor; + mValueBits[idx] = (int) Math.ceil(Math.log(threshold[idx]) / Math.log(2)); + } Review Comment: fixed -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: notifications-unsubscr...@tsfile.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
