Utf8String.java

net.minecraft.network.Utf8String

信息

• 全限定名：net.minecraft.network.Utf8String
• 类型：public class
• 包：net.minecraft.network
• 源码路径：src/main/java/net/minecraft/network/Utf8String.java
• 起始行号：L9
• 职责：

  TODO

字段/常量

• 无

内部类/嵌套类型

• 无

构造器

• 无

方法

下面的方法块按源码顺序生成。

public static String read(ByteBuf input, int maxLength) @ L10

• 方法名：read
• 源码定位：L10
• 返回类型：String
• 修饰符：public static

参数:

• input: ByteBuf
• maxLength: int

说明:

TODO

public static void write(ByteBuf output, CharSequence value, int maxLength) @ L35

• 方法名：write
• 源码定位：L35
• 返回类型：void
• 修饰符：public static

参数:

• output: ByteBuf
• value: CharSequence
• maxLength: int

说明:

TODO

代码

public class Utf8String {
    public static String read(ByteBuf input, int maxLength) {
        int maxEncodedLength = ByteBufUtil.utf8MaxBytes(maxLength);
        int bufferLength = VarInt.read(input);
        if (bufferLength > maxEncodedLength) {
            throw new DecoderException(
                "The received encoded string buffer length is longer than maximum allowed (" + bufferLength + " > " + maxEncodedLength + ")"
            );
        } else if (bufferLength < 0) {
            throw new DecoderException("The received encoded string buffer length is less than zero! Weird string!");
        } else {
            int availableBytes = input.readableBytes();
            if (bufferLength > availableBytes) {
                throw new DecoderException("Not enough bytes in buffer, expected " + bufferLength + ", but got " + availableBytes);
            } else {
                String result = input.toString(input.readerIndex(), bufferLength, StandardCharsets.UTF_8);
                input.readerIndex(input.readerIndex() + bufferLength);
                if (result.length() > maxLength) {
                    throw new DecoderException("The received string length is longer than maximum allowed (" + result.length() + " > " + maxLength + ")");
                } else {
                    return result;
                }
            }
        }
    }
 
    public static void write(ByteBuf output, CharSequence value, int maxLength) {
        if (value.length() > maxLength) {
            throw new EncoderException("String too big (was " + value.length() + " characters, max " + maxLength + ")");
        } else {
            int maxEncodedValueLength = ByteBufUtil.utf8MaxBytes(value);
            ByteBuf tmp = output.alloc().buffer(maxEncodedValueLength);
 
            try {
                int bytesWritten = ByteBufUtil.writeUtf8(tmp, value);
                int maxAllowedEncodedLength = ByteBufUtil.utf8MaxBytes(maxLength);
                if (bytesWritten > maxAllowedEncodedLength) {
                    throw new EncoderException("String too big (was " + bytesWritten + " bytes encoded, max " + maxAllowedEncodedLength + ")");
                }
 
                VarInt.write(output, bytesWritten);
                output.writeBytes(tmp);
            } finally {
                tmp.release();
            }
        }
    }
}

引用的其他类

• VarInt
  • 引用位置: 方法调用
  • 关联成员: VarInt.read(), VarInt.write()