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Lucene example source code file (SmallFloat.java)
The Lucene SmallFloat.java source codepackage org.apache.lucene.util; /** * Copyright 2005 The Apache Software Foundation * * 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. */ /** Floating point numbers smaller than 32 bits. * * @lucene.internal */ public class SmallFloat { /** Converts a 32 bit float to an 8 bit float. * <br>Values less than zero are all mapped to zero. * <br>Values are truncated (rounded down) to the nearest 8 bit value. * <br>Values between zero and the smallest representable value * are rounded up. * * @param f the 32 bit float to be converted to an 8 bit float (byte) * @param numMantissaBits the number of mantissa bits to use in the byte, with the remainder to be used in the exponent * @param zeroExp the zero-point in the range of exponent values * @return the 8 bit float representation */ public static byte floatToByte(float f, int numMantissaBits, int zeroExp) { // Adjustment from a float zero exponent to our zero exponent, // shifted over to our exponent position. int fzero = (63-zeroExp)< Other Lucene examples (source code examples)Here is a short list of links related to this Lucene SmallFloat.java source code file: |
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