io.questdb.griffin.engine.functions.cast.CastSymbolToLong256FunctionFactory Maven / Gradle / Ivy

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 *  Copyright (c) 2014-2019 Appsicle
 *  Copyright (c) 2019-2023 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
 *
 *  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.std.*;
import io.questdb.std.str.CharSink;

public class CastSymbolToLong256FunctionFactory implements FunctionFactory {
    @Override
    public String getSignature() {
        return "cast(Kh)";
    }

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

    static void appendLong256(CharSequence value, Long256Impl long256Builder, CharSink sink) {
        if (Numbers.extractLong256(value, value.length(), long256Builder)) {
            Numbers.appendLong256(
                    long256Builder.getLong0(),
                    long256Builder.getLong1(),
                    long256Builder.getLong2(),
                    long256Builder.getLong3(),
                    sink
            );
        }
    }

    private static class Func extends AbstractCastToLong256Function {
        private final Long256Impl long256a = new Long256Impl();
        private final Long256Impl long256b = new Long256Impl();
        private final Long256Impl long256builder = new Long256Impl();

        public Func(Function arg) {
            super(arg);
        }

        @Override
        public void getLong256(Record rec, CharSink sink) {
            final CharSequence value = arg.getSymbol(rec);
            if (value != null) {
                appendLong256(value, long256builder, sink);
            }
        }

        @Override
        public Long256 getLong256A(Record rec) {
            final CharSequence value = arg.getSymbol(rec);
            if (value == null) {
                return Long256Impl.NULL_LONG256;
            }
            return Numbers.parseLong256(value, value.length(), long256a);
        }

        @Override
        public Long256 getLong256B(Record rec) {
            final CharSequence value = arg.getSymbol(rec);
            if (value == null) {
                return Long256Impl.NULL_LONG256;
            }
            return Numbers.parseLong256(value, value.length(), long256b);
        }
    }
}