https://commons.apache.org/proper/commons-compress/: Apache Commons Compress software defines an API for working with compression and archive formats. These include: bzip2, gzip, pack200, lzma, xz, Snappy, traditional Unix Compress, DEFLATE, DEFLATE64, LZ4, Brotli, Zstandard and ar, cpio, jar, tar, zip, dump, 7z, arj. (The Apache Software Foundation)
  • Wolfgang Glas
  • Christian Kohlschütte
  • Bear Giles
  • Michael Kuss
  • Lasse Collin
  • John Kodis
  • BELUGA BEHR
  • Simon Spero
  • Michael Hausegger
  • Torsten Curdt
  • Stefan Bodewig
  • Sebastian Bazley
  • Christian Grobmeier
  • Julius Davies
  • Damjan Jovanovic
  • Emmanuel Bourg
  • Gary Gregory
  • Rob Tompkins 
public class org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream extends org.apache.commons.compress.compressors.lz77support.AbstractLZ77CompressorInputStream
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream
  super_class: org.apache.commons.compress.compressors.lz77support.AbstractLZ77CompressorInputStream
{
  static final int WINDOW_SIZE;
    descriptor: I
    flags: (0x0018) ACC_STATIC, ACC_FINAL
    ConstantValue: 65536

  static final int SIZE_BITS;
    descriptor: I
    flags: (0x0018) ACC_STATIC, ACC_FINAL
    ConstantValue: 4

  static final int BACK_REFERENCE_SIZE_MASK;
    descriptor: I
    flags: (0x0018) ACC_STATIC, ACC_FINAL
    ConstantValue: 15

  static final int LITERAL_SIZE_MASK;
    descriptor: I
    flags: (0x0018) ACC_STATIC, ACC_FINAL
    ConstantValue: 240

  private int nextBackReferenceSize;
    descriptor: I
    flags: (0x0002) ACC_PRIVATE

  private org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream$State state;
    descriptor: Lorg/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStream$State;
    flags: (0x0002) ACC_PRIVATE

  private static volatile int[] $SWITCH_TABLE$org$apache$commons$compress$compressors$lz4$BlockLZ4CompressorInputStream$State;
    descriptor: [I
    flags: (0x104a) ACC_PRIVATE, ACC_STATIC, ACC_VOLATILE, ACC_SYNTHETIC

  public void <init>(java.io.InputStream);
    descriptor: (Ljava/io/InputStream;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream this
        start local 1 // java.io.InputStream is
         0: .line 56
            aload 0 /* this */
            aload 1 /* is */
            ldc 65536
            invokespecial org.apache.commons.compress.compressors.lz77support.AbstractLZ77CompressorInputStream.<init>:(Ljava/io/InputStream;I)V
         1: .line 45
            aload 0 /* this */
            getstatic org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream$State.NO_BLOCK:Lorg/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStream$State;
            putfield org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream.state:Lorg/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStream$State;
         2: .line 57
            return
        end local 1 // java.io.InputStream is
        end local 0 // org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lorg/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStream;
            0    3     1    is  Ljava/io/InputStream;
    Exceptions:
      throws java.io.IOException
    MethodParameters:
      Name  Flags
      is    final

  public int read(byte[], int, int);
    descriptor: ([BII)I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=6, args_size=4
        start local 0 // org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream this
        start local 1 // byte[] b
        start local 2 // int off
        start local 3 // int len
         0: .line 64
            invokestatic org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream.$SWITCH_TABLE$org$apache$commons$compress$compressors$lz4$BlockLZ4CompressorInputStream$State:()[I
            aload 0 /* this */
            getfield org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream.state:Lorg/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStream$State;
            invokevirtual org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream$State.ordinal:()I
            iaload
            tableswitch { // 1 - 5
                    1: 2
                    2: 3
                    3: 9
                    4: 12
                    5: 1
              default: 18
          }
         1: .line 66
      StackMap locals:
      StackMap stack:
            iconst_m1
            ireturn
         2: .line 68
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            invokevirtual org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream.readSizes:()V
         3: .line 71
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            aload 1 /* b */
            iload 2 /* off */
            iload 3 /* len */
            invokevirtual org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream.readLiteral:([BII)I
            istore 4 /* litLen */
        start local 4 // int litLen
         4: .line 72
            aload 0 /* this */
            invokevirtual org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream.hasMoreDataInBlock:()Z
            ifne 6
         5: .line 73
            aload 0 /* this */
            getstatic org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream$State.LOOKING_FOR_BACK_REFERENCE:Lorg/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStream$State;
            putfield org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream.state:Lorg/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStream$State;
         6: .line 75
      StackMap locals: int
      StackMap stack:
            iload 4 /* litLen */
            ifle 7
            iload 4 /* litLen */
            goto 8
      StackMap locals:
      StackMap stack:
         7: aload 0 /* this */
            aload 1 /* b */
            iload 2 /* off */
            iload 3 /* len */
            invokevirtual org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream.read:([BII)I
      StackMap locals:
      StackMap stack: int
         8: ireturn
        end local 4 // int litLen
         9: .line 77
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            invokevirtual org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream.initializeBackReference:()Z
            ifne 12
        10: .line 78
            aload 0 /* this */
            getstatic org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream$State.EOF:Lorg/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStream$State;
            putfield org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream.state:Lorg/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStream$State;
        11: .line 79
            iconst_m1
            ireturn
        12: .line 83
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            aload 1 /* b */
            iload 2 /* off */
            iload 3 /* len */
            invokevirtual org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream.readBackReference:([BII)I
            istore 5 /* backReferenceLen */
        start local 5 // int backReferenceLen
        13: .line 84
            aload 0 /* this */
            invokevirtual org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream.hasMoreDataInBlock:()Z
            ifne 15
        14: .line 85
            aload 0 /* this */
            getstatic org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream$State.NO_BLOCK:Lorg/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStream$State;
            putfield org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream.state:Lorg/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStream$State;
        15: .line 87
      StackMap locals: org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream byte[] int int top int
      StackMap stack:
            iload 5 /* backReferenceLen */
            ifle 16
            iload 5 /* backReferenceLen */
            goto 17
      StackMap locals:
      StackMap stack:
        16: aload 0 /* this */
            aload 1 /* b */
            iload 2 /* off */
            iload 3 /* len */
            invokevirtual org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream.read:([BII)I
      StackMap locals:
      StackMap stack: int
        17: ireturn
        end local 5 // int backReferenceLen
        18: .line 89
      StackMap locals: org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream byte[] int int
      StackMap stack:
            new java.io.IOException
            dup
            new java.lang.StringBuilder
            dup
            ldc "Unknown stream state "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* this */
            getfield org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream.state:Lorg/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStream$State;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/Object;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokespecial java.io.IOException.<init>:(Ljava/lang/String;)V
            athrow
        end local 3 // int len
        end local 2 // int off
        end local 1 // byte[] b
        end local 0 // org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream this
      LocalVariableTable:
        Start  End  Slot              Name  Signature
            0   19     0              this  Lorg/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStream;
            0   19     1                 b  [B
            0   19     2               off  I
            0   19     3               len  I
            4    9     4            litLen  I
           13   18     5  backReferenceLen  I
    Exceptions:
      throws java.io.IOException
    MethodParameters:
      Name  Flags
      b     final
      off   final
      len   final

  private void readSizes();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=4, locals=4, args_size=1
        start local 0 // org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream this
         0: .line 94
            aload 0 /* this */
            invokevirtual org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream.readOneByte:()I
            istore 1 /* nextBlock */
        start local 1 // int nextBlock
         1: .line 95
            iload 1 /* nextBlock */
            iconst_m1
            if_icmpne 3
         2: .line 96
            new java.io.IOException
            dup
            ldc "Premature end of stream while looking for next block"
            invokespecial java.io.IOException.<init>:(Ljava/lang/String;)V
            athrow
         3: .line 98
      StackMap locals: int
      StackMap stack:
            aload 0 /* this */
            iload 1 /* nextBlock */
            bipush 15
            iand
            putfield org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream.nextBackReferenceSize:I
         4: .line 99
            iload 1 /* nextBlock */
            sipush 240
            iand
            iconst_4
            ishr
            i2l
            lstore 2 /* literalSizePart */
        start local 2 // long literalSizePart
         5: .line 100
            lload 2 /* literalSizePart */
            ldc 15
            lcmp
            ifne 7
         6: .line 101
            lload 2 /* literalSizePart */
            aload 0 /* this */
            invokevirtual org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream.readSizeBytes:()J
            ladd
            lstore 2 /* literalSizePart */
         7: .line 103
      StackMap locals: long
      StackMap stack:
            aload 0 /* this */
            lload 2 /* literalSizePart */
            invokevirtual org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream.startLiteral:(J)V
         8: .line 104
            aload 0 /* this */
            getstatic org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream$State.IN_LITERAL:Lorg/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStream$State;
            putfield org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream.state:Lorg/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStream$State;
         9: .line 105
            return
        end local 2 // long literalSizePart
        end local 1 // int nextBlock
        end local 0 // org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream this
      LocalVariableTable:
        Start  End  Slot             Name  Signature
            0   10     0             this  Lorg/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStream;
            1   10     1        nextBlock  I
            5   10     2  literalSizePart  J
    Exceptions:
      throws java.io.IOException

  private long readSizeBytes();
    descriptor: ()J
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=4, locals=4, args_size=1
        start local 0 // org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream this
         0: .line 108
            lconst_0
            lstore 1 /* accum */
        start local 1 // long accum
         1: .line 111
      StackMap locals: long
      StackMap stack:
            aload 0 /* this */
            invokevirtual org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream.readOneByte:()I
            istore 3 /* nextByte */
        start local 3 // int nextByte
         2: .line 112
            iload 3 /* nextByte */
            iconst_m1
            if_icmpne 4
         3: .line 113
            new java.io.IOException
            dup
            ldc "Premature end of stream while parsing length"
            invokespecial java.io.IOException.<init>:(Ljava/lang/String;)V
            athrow
         4: .line 115
      StackMap locals: int
      StackMap stack:
            lload 1 /* accum */
            iload 3 /* nextByte */
            i2l
            ladd
            lstore 1 /* accum */
         5: .line 116
            iload 3 /* nextByte */
            sipush 255
            if_icmpeq 1
         6: .line 117
            lload 1 /* accum */
            lreturn
        end local 3 // int nextByte
        end local 1 // long accum
        end local 0 // org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    7     0      this  Lorg/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStream;
            1    7     1     accum  J
            2    7     3  nextByte  I
    Exceptions:
      throws java.io.IOException

  private boolean initializeBackReference();
    descriptor: ()Z
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=6, locals=4, args_size=1
        start local 0 // org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream this
         0: .line 125
            iconst_0
            istore 1 /* backReferenceOffset */
        start local 1 // int backReferenceOffset
         1: .line 127
            aload 0 /* this */
            getfield org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream.supplier:Lorg/apache/commons/compress/utils/ByteUtils$ByteSupplier;
            iconst_2
            invokestatic org.apache.commons.compress.utils.ByteUtils.fromLittleEndian:(Lorg/apache/commons/compress/utils/ByteUtils$ByteSupplier;I)J
            l2i
            istore 1 /* backReferenceOffset */
         2: .line 128
            goto 7
      StackMap locals: org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream int
      StackMap stack: java.io.IOException
         3: astore 2 /* ex */
        start local 2 // java.io.IOException ex
         4: .line 129
            aload 0 /* this */
            getfield org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream.nextBackReferenceSize:I
            ifne 6
         5: .line 130
            iconst_0
            ireturn
         6: .line 132
      StackMap locals: java.io.IOException
      StackMap stack:
            aload 2 /* ex */
            athrow
        end local 2 // java.io.IOException ex
         7: .line 134
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream.nextBackReferenceSize:I
            i2l
            lstore 2 /* backReferenceSize */
        start local 2 // long backReferenceSize
         8: .line 135
            aload 0 /* this */
            getfield org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream.nextBackReferenceSize:I
            bipush 15
            if_icmpne 10
         9: .line 136
            lload 2 /* backReferenceSize */
            aload 0 /* this */
            invokevirtual org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream.readSizeBytes:()J
            ladd
            lstore 2 /* backReferenceSize */
        10: .line 139
      StackMap locals: long
      StackMap stack:
            aload 0 /* this */
            iload 1 /* backReferenceOffset */
            lload 2 /* backReferenceSize */
            ldc 4
            ladd
            invokevirtual org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream.startBackReference:(IJ)V
        11: .line 140
            aload 0 /* this */
            getstatic org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream$State.IN_BACK_REFERENCE:Lorg/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStream$State;
            putfield org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream.state:Lorg/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStream$State;
        12: .line 141
            iconst_1
            ireturn
        end local 2 // long backReferenceSize
        end local 1 // int backReferenceOffset
        end local 0 // org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream this
      LocalVariableTable:
        Start  End  Slot                 Name  Signature
            0   13     0                 this  Lorg/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStream;
            1   13     1  backReferenceOffset  I
            4    7     2                   ex  Ljava/io/IOException;
            8   13     2    backReferenceSize  J
      Exception table:
        from    to  target  type
           1     2       3  Class java.io.IOException
    Exceptions:
      throws java.io.IOException

  static int[] $SWITCH_TABLE$org$apache$commons$compress$compressors$lz4$BlockLZ4CompressorInputStream$State();
    descriptor: ()[I
    flags: (0x1008) ACC_STATIC, ACC_SYNTHETIC
    Code:
      stack=3, locals=1, args_size=0
         0: .line 34
            getstatic org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream.$SWITCH_TABLE$org$apache$commons$compress$compressors$lz4$BlockLZ4CompressorInputStream$State:[I
            dup
            ifnull 1
            areturn
      StackMap locals:
      StackMap stack: int[]
         1: pop
            invokestatic org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream$State.values:()[Lorg/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStream$State;
            arraylength
            newarray 10
            astore 0
         2: aload 0
            getstatic org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream$State.EOF:Lorg/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStream$State;
            invokevirtual org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream$State.ordinal:()I
            iconst_5
            iastore
         3: goto 5
      StackMap locals: int[]
      StackMap stack: java.lang.NoSuchFieldError
         4: pop
      StackMap locals:
      StackMap stack:
         5: aload 0
            getstatic org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream$State.IN_BACK_REFERENCE:Lorg/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStream$State;
            invokevirtual org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream$State.ordinal:()I
            iconst_4
            iastore
         6: goto 8
      StackMap locals:
      StackMap stack: java.lang.NoSuchFieldError
         7: pop
      StackMap locals:
      StackMap stack:
         8: aload 0
            getstatic org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream$State.IN_LITERAL:Lorg/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStream$State;
            invokevirtual org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream$State.ordinal:()I
            iconst_2
            iastore
         9: goto 11
      StackMap locals:
      StackMap stack: java.lang.NoSuchFieldError
        10: pop
      StackMap locals:
      StackMap stack:
        11: aload 0
            getstatic org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream$State.LOOKING_FOR_BACK_REFERENCE:Lorg/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStream$State;
            invokevirtual org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream$State.ordinal:()I
            iconst_3
            iastore
        12: goto 14
      StackMap locals:
      StackMap stack: java.lang.NoSuchFieldError
        13: pop
      StackMap locals:
      StackMap stack:
        14: aload 0
            getstatic org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream$State.NO_BLOCK:Lorg/apache/commons/compress/compressors/lz4/BlockLZ4CompressorInputStream$State;
            invokevirtual org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream$State.ordinal:()I
            iconst_1
            iastore
        15: goto 17
      StackMap locals:
      StackMap stack: java.lang.NoSuchFieldError
        16: pop
      StackMap locals:
      StackMap stack:
        17: aload 0
            dup
            putstatic org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream.$SWITCH_TABLE$org$apache$commons$compress$compressors$lz4$BlockLZ4CompressorInputStream$State:[I
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
      Exception table:
        from    to  target  type
           2     3       4  Class java.lang.NoSuchFieldError
           5     6       7  Class java.lang.NoSuchFieldError
           8     9      10  Class java.lang.NoSuchFieldError
          11    12      13  Class java.lang.NoSuchFieldError
          14    15      16  Class java.lang.NoSuchFieldError
}
SourceFile: "BlockLZ4CompressorInputStream.java"
NestMembers:
  org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream$State
InnerClasses:
  private final State = org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream$State of org.apache.commons.compress.compressors.lz4.BlockLZ4CompressorInputStream
  public abstract ByteSupplier = org.apache.commons.compress.utils.ByteUtils$ByteSupplier of org.apache.commons.compress.utils.ByteUtils