spark MathUtils 源码

spark MathUtils 代码

文件路径：/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/MathUtils.scala

/*
 * 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.spark.sql.catalyst.util

import org.apache.spark.sql.catalyst.trees.SQLQueryContext
import org.apache.spark.sql.errors.QueryExecutionErrors

/**
 * Helper functions for arithmetic operations with overflow.
 */
object MathUtils {

  def addExact(a: Int, b: Int): Int = withOverflow(Math.addExact(a, b))

  def addExact(a: Int, b: Int, context: SQLQueryContext): Int = {
    withOverflow(Math.addExact(a, b), hint = "try_add", context)
  }

  def addExact(a: Long, b: Long): Long = withOverflow(Math.addExact(a, b))

  def addExact(a: Long, b: Long, context: SQLQueryContext): Long = {
    withOverflow(Math.addExact(a, b), hint = "try_add", context)
  }

  def subtractExact(a: Int, b: Int): Int = withOverflow(Math.subtractExact(a, b))

  def subtractExact(a: Int, b: Int, context: SQLQueryContext): Int = {
    withOverflow(Math.subtractExact(a, b), hint = "try_subtract", context)
  }

  def subtractExact(a: Long, b: Long): Long = withOverflow(Math.subtractExact(a, b))

  def subtractExact(a: Long, b: Long, context: SQLQueryContext): Long = {
    withOverflow(Math.subtractExact(a, b), hint = "try_subtract", context)
  }

  def multiplyExact(a: Int, b: Int): Int = withOverflow(Math.multiplyExact(a, b))

  def multiplyExact(a: Int, b: Int, context: SQLQueryContext): Int = {
    withOverflow(Math.multiplyExact(a, b), hint = "try_multiply", context)
  }

  def multiplyExact(a: Long, b: Long): Long = withOverflow(Math.multiplyExact(a, b))

  def multiplyExact(a: Long, b: Long, context: SQLQueryContext): Long = {
    withOverflow(Math.multiplyExact(a, b), hint = "try_multiply", context)
  }

  def negateExact(a: Int): Int = withOverflow(Math.negateExact(a))

  def negateExact(a: Long): Long = withOverflow(Math.negateExact(a))

  def toIntExact(a: Long): Int = withOverflow(Math.toIntExact(a))

  def floorDiv(a: Int, b: Int): Int = withOverflow(Math.floorDiv(a, b), hint = "try_divide")

  def floorDiv(a: Long, b: Long): Long = withOverflow(Math.floorDiv(a, b), hint = "try_divide")

  def floorMod(a: Int, b: Int): Int = withOverflow(Math.floorMod(a, b))

  def floorMod(a: Long, b: Long): Long = withOverflow(Math.floorMod(a, b))

  private def withOverflow[A](
      f: => A,
      hint: String = "",
      context: SQLQueryContext = null): A = {
    try {
      f
    } catch {
      case e: ArithmeticException =>
        throw QueryExecutionErrors.arithmeticOverflowError(e.getMessage, hint, context)
    }
  }
}

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