NbtAccounter.java

net.minecraft.nbt.NbtAccounter

信息

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

  TODO

字段/常量

• DEFAULT_NBT_QUOTA

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

    TODO

• UNCOMPRESSED_NBT_QUOTA

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

    TODO

• MAX_STACK_DEPTH

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

    TODO

• quota

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

    TODO

• usage

  • 类型: long
  • 修饰符: private
  • 源码定位: L10
  • 说明:

    TODO

• maxDepth

  • 类型: int
  • 修饰符: private final
  • 源码定位: L11
  • 说明:

    TODO

• depth

  • 类型: int
  • 修饰符: private
  • 源码定位: L12
  • 说明:

    TODO

内部类/嵌套类型

• 无

构造器

public NbtAccounter(long quota, int maxDepth) @ L14

• 构造器名：NbtAccounter
• 源码定位：L14
• 修饰符：public

参数:

• quota: long
• maxDepth: int

说明:

TODO

方法

下面的方法块按源码顺序生成。

public static NbtAccounter create(long quota) @ L19

• 方法名：create
• 源码定位：L19
• 返回类型：NbtAccounter
• 修饰符：public static

参数:

• quota: long

说明:

TODO

public static NbtAccounter defaultQuota() @ L23

• 方法名：defaultQuota
• 源码定位：L23
• 返回类型：NbtAccounter
• 修饰符：public static

参数:

• 无

说明:

TODO

public static NbtAccounter uncompressedQuota() @ L27

• 方法名：uncompressedQuota
• 源码定位：L27
• 返回类型：NbtAccounter
• 修饰符：public static

参数:

• 无

说明:

TODO

public static NbtAccounter unlimitedHeap() @ L31

• 方法名：unlimitedHeap
• 源码定位：L31
• 返回类型：NbtAccounter
• 修饰符：public static

参数:

• 无

说明:

TODO

public void accountBytes(long bytesPerEntry, long count) @ L35

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

参数:

• bytesPerEntry: long
• count: long

说明:

TODO

public void accountBytes(long size) @ L39

• 方法名：accountBytes
• 源码定位：L39
• 返回类型：void
• 修饰符：public

参数:

• size: long

说明:

TODO

public void pushDepth() @ L51

• 方法名：pushDepth
• 源码定位：L51
• 返回类型：void
• 修饰符：public

参数:

• 无

说明:

TODO

public void popDepth() @ L59

• 方法名：popDepth
• 源码定位：L59
• 返回类型：void
• 修饰符：public

参数:

• 无

说明:

TODO

public long getUsage() @ L67

• 方法名：getUsage
• 源码定位：L67
• 返回类型：long
• 修饰符：public

参数:

• 无

说明:

TODO

public int getDepth() @ L72

• 方法名：getDepth
• 源码定位：L72
• 返回类型：int
• 修饰符：public

参数:

• 无

说明:

TODO

代码

public class NbtAccounter {
    public static final int DEFAULT_NBT_QUOTA = 2097152;
    public static final int UNCOMPRESSED_NBT_QUOTA = 104857600;
    private static final int MAX_STACK_DEPTH = 512;
    private final long quota;
    private long usage;
    private final int maxDepth;
    private int depth;
 
    public NbtAccounter(long quota, int maxDepth) {
        this.quota = quota;
        this.maxDepth = maxDepth;
    }
 
    public static NbtAccounter create(long quota) {
        return new NbtAccounter(quota, 512);
    }
 
    public static NbtAccounter defaultQuota() {
        return new NbtAccounter(2097152L, 512);
    }
 
    public static NbtAccounter uncompressedQuota() {
        return new NbtAccounter(104857600L, 512);
    }
 
    public static NbtAccounter unlimitedHeap() {
        return new NbtAccounter(Long.MAX_VALUE, 512);
    }
 
    public void accountBytes(long bytesPerEntry, long count) {
        this.accountBytes(bytesPerEntry * count);
    }
 
    public void accountBytes(long size) {
        if (size < 0L) {
            throw new IllegalArgumentException("Tried to account NBT tag with negative size: " + size);
        } else if (this.usage + size > this.quota) {
            throw new NbtAccounterException(
                "Tried to read NBT tag that was too big; tried to allocate: " + this.usage + " + " + size + " bytes where max allowed: " + this.quota
            );
        } else {
            this.usage += size;
        }
    }
 
    public void pushDepth() {
        if (this.depth >= this.maxDepth) {
            throw new NbtAccounterException("Tried to read NBT tag with too high complexity, depth > " + this.maxDepth);
        } else {
            this.depth++;
        }
    }
 
    public void popDepth() {
        if (this.depth <= 0) {
            throw new NbtAccounterException("NBT-Accounter tried to pop stack-depth at top-level");
        } else {
            this.depth--;
        }
    }
 
    @VisibleForTesting
    public long getUsage() {
        return this.usage;
    }
 
    @VisibleForTesting
    public int getDepth() {
        return this.depth;
    }
}

引用的其他类

• NbtAccounterException
  • 引用位置: 构造调用
  • 关联成员: NbtAccounterException()