VarLong.java

net.minecraft.network.VarLong

信息

• 全限定名：net.minecraft.network.VarLong
• 类型：public class
• 包：net.minecraft.network
• 源码路径：src/main/java/net/minecraft/network/VarLong.java
• 起始行号：L5
• 职责：

  TODO

字段/常量

• MAX_VARLONG_SIZE

  • 类型: int
  • 修饰符: private static final
  • 源码定位: L6
  • 说明:

    TODO

• DATA_BITS_MASK

  • 类型: int
  • 修饰符: private static final
  • 源码定位: L7
  • 说明:

    TODO

• CONTINUATION_BIT_MASK

  • 类型: int
  • 修饰符: private static final
  • 源码定位: L8
  • 说明:

    TODO

• DATA_BITS_PER_BYTE

  • 类型: int
  • 修饰符: private static final
  • 源码定位: L9
  • 说明:

    TODO

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 int getByteSize(long value) @ L11

• 方法名：getByteSize
• 源码定位：L11
• 返回类型：int
• 修饰符：public static

参数:

• value: long

说明:

TODO

public static boolean hasContinuationBit(byte in) @ L21

• 方法名：hasContinuationBit
• 源码定位：L21
• 返回类型：boolean
• 修饰符：public static

参数:

• in: byte

说明:

TODO

public static long read(ByteBuf input) @ L25

• 方法名：read
• 源码定位：L25
• 返回类型：long
• 修饰符：public static

参数:

• input: ByteBuf

说明:

TODO

public static ByteBuf write(ByteBuf output, long value) @ L41

• 方法名：write
• 源码定位：L41
• 返回类型：ByteBuf
• 修饰符：public static

参数:

• output: ByteBuf
• value: long

说明:

TODO

代码

public class VarLong {
    private static final int MAX_VARLONG_SIZE = 10;
    private static final int DATA_BITS_MASK = 127;
    private static final int CONTINUATION_BIT_MASK = 128;
    private static final int DATA_BITS_PER_BYTE = 7;
 
    public static int getByteSize(long value) {
        for (int i = 1; i < 10; i++) {
            if ((value & -1L << i * 7) == 0L) {
                return i;
            }
        }
 
        return 10;
    }
 
    public static boolean hasContinuationBit(byte in) {
        return (in & 128) == 128;
    }
 
    public static long read(ByteBuf input) {
        long out = 0L;
        int bytes = 0;
 
        byte in;
        do {
            in = input.readByte();
            out |= (long)(in & 127) << bytes++ * 7;
            if (bytes > 10) {
                throw new RuntimeException("VarLong too big");
            }
        } while (hasContinuationBit(in));
 
        return out;
    }
 
    public static ByteBuf write(ByteBuf output, long value) {
        while ((value & -128L) != 0L) {
            output.writeByte((int)(value & 127L) | 128);
            value >>>= 7;
        }
 
        output.writeByte((int)value);
        return output;
    }
}

引用的其他类

• 无