/*
* 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.facebook.presto.type;
import com.facebook.presto.operator.scalar.MathFunctions;
import com.facebook.presto.spi.PrestoException;
import com.facebook.presto.spi.function.IsNull;
import com.facebook.presto.spi.function.LiteralParameters;
import com.facebook.presto.spi.function.ScalarOperator;
import com.facebook.presto.spi.function.SqlType;
import com.facebook.presto.spi.type.AbstractIntType;
import com.facebook.presto.spi.type.StandardTypes;
import com.google.common.math.DoubleMath;
import com.google.common.primitives.Shorts;
import com.google.common.primitives.SignedBytes;
import io.airlift.slice.Slice;
import static com.facebook.presto.spi.StandardErrorCode.NUMERIC_VALUE_OUT_OF_RANGE;
import static com.facebook.presto.spi.function.OperatorType.ADD;
import static com.facebook.presto.spi.function.OperatorType.BETWEEN;
import static com.facebook.presto.spi.function.OperatorType.CAST;
import static com.facebook.presto.spi.function.OperatorType.DIVIDE;
import static com.facebook.presto.spi.function.OperatorType.EQUAL;
import static com.facebook.presto.spi.function.OperatorType.GREATER_THAN;
import static com.facebook.presto.spi.function.OperatorType.GREATER_THAN_OR_EQUAL;
import static com.facebook.presto.spi.function.OperatorType.HASH_CODE;
import static com.facebook.presto.spi.function.OperatorType.IS_DISTINCT_FROM;
import static com.facebook.presto.spi.function.OperatorType.LESS_THAN;
import static com.facebook.presto.spi.function.OperatorType.LESS_THAN_OR_EQUAL;
import static com.facebook.presto.spi.function.OperatorType.MODULUS;
import static com.facebook.presto.spi.function.OperatorType.MULTIPLY;
import static com.facebook.presto.spi.function.OperatorType.NEGATION;
import static com.facebook.presto.spi.function.OperatorType.NOT_EQUAL;
import static com.facebook.presto.spi.function.OperatorType.SATURATED_FLOOR_CAST;
import static com.facebook.presto.spi.function.OperatorType.SUBTRACT;
import static io.airlift.slice.Slices.utf8Slice;
import static java.lang.Float.floatToRawIntBits;
import static java.lang.Float.intBitsToFloat;
import static java.lang.Math.toIntExact;
import static java.lang.String.valueOf;
import static java.math.RoundingMode.FLOOR;
public final class RealOperators
{
private static final float MIN_LONG_AS_FLOAT = -0x1p63f;
private static final float MAX_LONG_PLUS_ONE_AS_FLOAT = 0x1p63f;
private static final float MIN_INTEGER_AS_FLOAT = -0x1p31f;
private static final float MAX_INTEGER_PLUS_ONE_AS_FLOAT = 0x1p31f;
private static final float MIN_SHORT_AS_FLOAT = -0x1p15f;
private static final float MAX_SHORT_PLUS_ONE_AS_FLOAT = 0x1p15f;
private static final float MIN_BYTE_AS_FLOAT = -0x1p7f;
private static final float MAX_BYTE_PLUS_ONE_AS_FLOAT = 0x1p7f;
private RealOperators()
{
}
@ScalarOperator(ADD)
@SqlType(StandardTypes.REAL)
public static long add(@SqlType(StandardTypes.REAL) long left, @SqlType(StandardTypes.REAL) long right)
{
return floatToRawIntBits(intBitsToFloat((int) left) + intBitsToFloat((int) right));
}
@ScalarOperator(SUBTRACT)
@SqlType(StandardTypes.REAL)
public static long subtract(@SqlType(StandardTypes.REAL) long left, @SqlType(StandardTypes.REAL) long right)
{
return floatToRawIntBits(intBitsToFloat((int) left) - intBitsToFloat((int) right));
}
@ScalarOperator(MULTIPLY)
@SqlType(StandardTypes.REAL)
public static long multiply(@SqlType(StandardTypes.REAL) long left, @SqlType(StandardTypes.REAL) long right)
{
return floatToRawIntBits(intBitsToFloat((int) left) * intBitsToFloat((int) right));
}
@ScalarOperator(DIVIDE)
@SqlType(StandardTypes.REAL)
public static long divide(@SqlType(StandardTypes.REAL) long left, @SqlType(StandardTypes.REAL) long right)
{
return floatToRawIntBits(intBitsToFloat((int) left) / intBitsToFloat((int) right));
}
@ScalarOperator(MODULUS)
@SqlType(StandardTypes.REAL)
public static long modulus(@SqlType(StandardTypes.REAL) long left, @SqlType(StandardTypes.REAL) long right)
{
return floatToRawIntBits(intBitsToFloat((int) left) % intBitsToFloat((int) right));
}
@ScalarOperator(NEGATION)
@SqlType(StandardTypes.REAL)
public static long negate(@SqlType(StandardTypes.REAL) long value)
{
return floatToRawIntBits(-intBitsToFloat((int) value));
}
@ScalarOperator(EQUAL)
@SqlType(StandardTypes.BOOLEAN)
public static boolean equal(@SqlType(StandardTypes.REAL) long left, @SqlType(StandardTypes.REAL) long right)
{
return intBitsToFloat((int) left) == intBitsToFloat((int) right);
}
@ScalarOperator(NOT_EQUAL)
@SqlType(StandardTypes.BOOLEAN)
public static boolean notEqual(@SqlType(StandardTypes.REAL) long left, @SqlType(StandardTypes.REAL) long right)
{
return intBitsToFloat((int) left) != intBitsToFloat((int) right);
}
@ScalarOperator(LESS_THAN)
@SqlType(StandardTypes.BOOLEAN)
public static boolean lessThan(@SqlType(StandardTypes.REAL) long left, @SqlType(StandardTypes.REAL) long right)
{
return intBitsToFloat((int) left) < intBitsToFloat((int) right);
}
@ScalarOperator(LESS_THAN_OR_EQUAL)
@SqlType(StandardTypes.BOOLEAN)
public static boolean lessThanOrEqual(@SqlType(StandardTypes.REAL) long left, @SqlType(StandardTypes.REAL) long right)
{
return intBitsToFloat((int) left) <= intBitsToFloat((int) right);
}
@ScalarOperator(GREATER_THAN)
@SqlType(StandardTypes.BOOLEAN)
public static boolean greaterThan(@SqlType(StandardTypes.REAL) long left, @SqlType(StandardTypes.REAL) long right)
{
return intBitsToFloat((int) left) > intBitsToFloat((int) right);
}
@ScalarOperator(GREATER_THAN_OR_EQUAL)
@SqlType(StandardTypes.BOOLEAN)
public static boolean greaterThanOrEqual(@SqlType(StandardTypes.REAL) long left, @SqlType(StandardTypes.REAL) long right)
{
return intBitsToFloat((int) left) >= intBitsToFloat((int) right);
}
@ScalarOperator(BETWEEN)
@SqlType(StandardTypes.BOOLEAN)
public static boolean between(@SqlType(StandardTypes.REAL) long value, @SqlType(StandardTypes.REAL) long min, @SqlType(StandardTypes.REAL) long max)
{
return intBitsToFloat((int) min) <= intBitsToFloat((int) value) &&
intBitsToFloat((int) value) <= intBitsToFloat((int) max);
}
@ScalarOperator(HASH_CODE)
@SqlType(StandardTypes.BIGINT)
public static long hashCode(@SqlType(StandardTypes.REAL) long value)
{
return AbstractIntType.hash((int) value);
}
@ScalarOperator(CAST)
@LiteralParameters("x")
@SqlType("varchar(x)")
public static Slice castToVarchar(@SqlType(StandardTypes.REAL) long value)
{
return utf8Slice(valueOf(intBitsToFloat((int) value)));
}
@ScalarOperator(CAST)
@SqlType(StandardTypes.BIGINT)
public static long castToLong(@SqlType(StandardTypes.REAL) long value)
{
return (long) MathFunctions.round((double) intBitsToFloat((int) value));
}
@ScalarOperator(CAST)
@SqlType(StandardTypes.INTEGER)
public static long castToInteger(@SqlType(StandardTypes.REAL) long value)
{
try {
return toIntExact((long) MathFunctions.round((double) intBitsToFloat((int) value)));
}
catch (ArithmeticException e) {
throw new PrestoException(NUMERIC_VALUE_OUT_OF_RANGE, "Out of range for integer: " + value, e);
}
}
@ScalarOperator(CAST)
@SqlType(StandardTypes.SMALLINT)
public static long castToSmallint(@SqlType(StandardTypes.REAL) long value)
{
try {
return Shorts.checkedCast((long) MathFunctions.round((double) intBitsToFloat((int) value)));
}
catch (IllegalArgumentException e) {
throw new PrestoException(NUMERIC_VALUE_OUT_OF_RANGE, "Out of range for smallint: " + value, e);
}
}
@ScalarOperator(CAST)
@SqlType(StandardTypes.TINYINT)
public static long castToTinyint(@SqlType(StandardTypes.REAL) long value)
{
try {
return SignedBytes.checkedCast((long) MathFunctions.round((double) intBitsToFloat((int) value)));
}
catch (IllegalArgumentException e) {
throw new PrestoException(NUMERIC_VALUE_OUT_OF_RANGE, "Out of range for tinyint: " + value, e);
}
}
@ScalarOperator(CAST)
@SqlType(StandardTypes.DOUBLE)
public static double castToDouble(@SqlType(StandardTypes.REAL) long value)
{
return (double) intBitsToFloat((int) value);
}
@ScalarOperator(CAST)
@SqlType(StandardTypes.BOOLEAN)
public static boolean castToBoolean(@SqlType(StandardTypes.REAL) long value)
{
return intBitsToFloat((int) value) != 0.0f;
}
@ScalarOperator(IS_DISTINCT_FROM)
@SqlType(StandardTypes.BOOLEAN)
public static boolean isDistinctFrom(
@SqlType(StandardTypes.REAL) long left,
@IsNull boolean leftNull,
@SqlType(StandardTypes.REAL) long right,
@IsNull boolean rightNull)
{
if (leftNull != rightNull) {
return true;
}
if (leftNull) {
return false;
}
return notEqual(left, right);
}
@ScalarOperator(SATURATED_FLOOR_CAST)
@SqlType(StandardTypes.BIGINT)
public static long saturatedFloorCastToBigint(@SqlType(StandardTypes.REAL) long value)
{
return saturatedFloorCastToLong(value, Long.MIN_VALUE, MIN_LONG_AS_FLOAT, Long.MAX_VALUE, MAX_LONG_PLUS_ONE_AS_FLOAT);
}
@ScalarOperator(SATURATED_FLOOR_CAST)
@SqlType(StandardTypes.INTEGER)
public static long saturatedFloorCastToInteger(@SqlType(StandardTypes.REAL) long value)
{
return saturatedFloorCastToLong(value, Integer.MIN_VALUE, MIN_INTEGER_AS_FLOAT, Integer.MAX_VALUE, MAX_INTEGER_PLUS_ONE_AS_FLOAT);
}
@ScalarOperator(SATURATED_FLOOR_CAST)
@SqlType(StandardTypes.SMALLINT)
public static long saturatedFloorCastToSmallint(@SqlType(StandardTypes.REAL) long value)
{
return saturatedFloorCastToLong(value, Short.MIN_VALUE, MIN_SHORT_AS_FLOAT, Short.MAX_VALUE, MAX_SHORT_PLUS_ONE_AS_FLOAT);
}
@ScalarOperator(SATURATED_FLOOR_CAST)
@SqlType(StandardTypes.TINYINT)
public static long saturatedFloorCastToTinyint(@SqlType(StandardTypes.REAL) long value)
{
return saturatedFloorCastToLong(value, Byte.MIN_VALUE, MIN_BYTE_AS_FLOAT, Byte.MAX_VALUE, MAX_BYTE_PLUS_ONE_AS_FLOAT);
}
private static long saturatedFloorCastToLong(long valueBits, long minValue, float minValueAsDouble, long maxValue, float maxValuePlusOneAsDouble)
{
float value = intBitsToFloat((int) valueBits);
if (value <= minValueAsDouble) {
return minValue;
}
if (value + 1 >= maxValuePlusOneAsDouble) {
return maxValue;
}
return DoubleMath.roundToLong(value, FLOOR);
}
}