io.questdb.griffin.engine.functions.cast.CastFloatToLong256FunctionFactory Maven / Gradle / Ivy

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 *  Copyright (c) 2014-2019 Appsicle
 *  Copyright (c) 2019-2020 QuestDB
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 *  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
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 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
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package io.questdb.griffin.engine.functions.cast;

import io.questdb.cairo.CairoConfiguration;
import io.questdb.cairo.sql.Function;
import io.questdb.cairo.sql.Record;
import io.questdb.griffin.FunctionFactory;
import io.questdb.griffin.SqlExecutionContext;
import io.questdb.griffin.engine.functions.Long256Function;
import io.questdb.griffin.engine.functions.UnaryFunction;
import io.questdb.std.Long256;
import io.questdb.std.Long256Impl;
import io.questdb.std.Numbers;
import io.questdb.std.ObjList;
import io.questdb.std.str.CharSink;

public class CastFloatToLong256FunctionFactory implements FunctionFactory {
    @Override
    public String getSignature() {
        return "cast(Fh)";
    }

    @Override
    public Function newInstance(ObjList args, int position, CairoConfiguration configuration, SqlExecutionContext sqlExecutionContext) {
        return new Func(position, args.getQuick(0));
    }

    private static class Func extends Long256Function implements UnaryFunction {
        private final Function arg;
        private final Long256Impl long256a = new Long256Impl();
        private final Long256Impl long256b = new Long256Impl();

        public Func(int position, Function arg) {
            super(position);
            this.arg = arg;
        }

        @Override
        public Function getArg() {
            return arg;
        }

        @Override
        public Long256 getLong256A(Record rec) {
            final float value = arg.getFloat(rec);
            if (Float.isNaN(value)) {
                return Long256Impl.NULL_LONG256;
            }
            long256a.setLong0((long) value);
            return long256a;
        }

        @Override
        public Long256 getLong256B(Record rec) {
            final float value = arg.getFloat(rec);
            if (Float.isNaN(value)) {
                return Long256Impl.NULL_LONG256;
            }
            long256b.setLong0((long) value);
            return long256b;
        }

        @Override
        public void getLong256(Record rec, CharSink sink) {
            final float value = arg.getFloat(rec);
            if (Float.isNaN(value)) {
                return;
            }
            Numbers.appendLong256((long) value, 0, 0, 0, sink);
        }
    }
}