80 lines
3.2 KiB
Java
80 lines
3.2 KiB
Java
/*
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* This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
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* Copyright (C) 2016-2023 ViaVersion and contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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package com.viaversion.viaversion.api.type.types;
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import com.google.common.base.Preconditions;
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import com.viaversion.viaversion.api.type.OptionalType;
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import com.viaversion.viaversion.api.type.Type;
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import io.netty.buffer.ByteBuf;
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import java.nio.charset.StandardCharsets;
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public class StringType extends Type<String> {
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// String#length() (used to limit the string in Minecraft source code) uses char[]#length
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private static final int MAX_CHAR_UTF_8_LENGTH = Character.toString(Character.MAX_VALUE)
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.getBytes(StandardCharsets.UTF_8).length;
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private final int maxLength;
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public StringType() {
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this(Short.MAX_VALUE);
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}
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public StringType(int maxLength) {
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super(String.class);
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this.maxLength = maxLength;
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}
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@Override
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public String read(ByteBuf buffer) throws Exception {
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int len = Type.VAR_INT.readPrimitive(buffer);
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Preconditions.checkArgument(len <= maxLength * MAX_CHAR_UTF_8_LENGTH,
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"Cannot receive string longer than Short.MAX_VALUE * " + MAX_CHAR_UTF_8_LENGTH + " bytes (got %s bytes)", len);
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String string = buffer.toString(buffer.readerIndex(), len, StandardCharsets.UTF_8);
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buffer.skipBytes(len);
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Preconditions.checkArgument(string.length() <= maxLength,
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"Cannot receive string longer than Short.MAX_VALUE characters (got %s bytes)", string.length());
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return string;
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}
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@Override
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public void write(ByteBuf buffer, String object) throws Exception {
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if (object.length() > maxLength) {
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throw new IllegalArgumentException("Cannot send string longer than Short.MAX_VALUE characters (got " + object.length() + " characters)");
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}
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byte[] b = object.getBytes(StandardCharsets.UTF_8);
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Type.VAR_INT.writePrimitive(buffer, b.length);
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buffer.writeBytes(b);
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}
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public static final class OptionalStringType extends OptionalType<String> {
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public OptionalStringType() {
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super(Type.STRING);
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}
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}
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}
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