https://github.com/FasterXML/jackson-core: Core Jackson processing abstractions (aka Streaming API), implementation for JSON (FasterXML)
  • Tatu Saloranta 
public final class com.fasterxml.jackson.core.io.BigDecimalParser
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: com.fasterxml.jackson.core.io.BigDecimalParser
  super_class: java.lang.Object
{
  private final char[] chars;
    descriptor: [C
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  void <init>(char[]);
    descriptor: ([C)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.fasterxml.jackson.core.io.BigDecimalParser this
        start local 1 // char[] chars
         0: .line 26
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 27
            aload 0 /* this */
            aload 1 /* chars */
            putfield com.fasterxml.jackson.core.io.BigDecimalParser.chars:[C
         2: .line 28
            return
        end local 1 // char[] chars
        end local 0 // com.fasterxml.jackson.core.io.BigDecimalParser this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    3     0   this  Lcom/fasterxml/jackson/core/io/BigDecimalParser;
            0    3     1  chars  [C
    MethodParameters:
       Name  Flags
      chars  

  public static java.math.BigDecimal parse(java.lang.String);
    descriptor: (Ljava/lang/String;)Ljava/math/BigDecimal;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // java.lang.String valueStr
         0: .line 31
            aload 0 /* valueStr */
            invokevirtual java.lang.String.toCharArray:()[C
            invokestatic com.fasterxml.jackson.core.io.BigDecimalParser.parse:([C)Ljava/math/BigDecimal;
            areturn
        end local 0 // java.lang.String valueStr
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    1     0  valueStr  Ljava/lang/String;
    MethodParameters:
          Name  Flags
      valueStr  

  public static java.math.BigDecimal parse(char[], int, int);
    descriptor: ([CII)Ljava/math/BigDecimal;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=4, locals=3, args_size=3
        start local 0 // char[] chars
        start local 1 // int off
        start local 2 // int len
         0: .line 35
            iload 1 /* off */
            ifgt 1
            iload 2 /* len */
            aload 0 /* chars */
            arraylength
            if_icmpeq 2
         1: .line 36
      StackMap locals:
      StackMap stack:
            aload 0 /* chars */
            iload 1 /* off */
            iload 1 /* off */
            iload 2 /* len */
            iadd
            invokestatic java.util.Arrays.copyOfRange:([CII)[C
            astore 0 /* chars */
         2: .line 38
      StackMap locals:
      StackMap stack:
            aload 0 /* chars */
            invokestatic com.fasterxml.jackson.core.io.BigDecimalParser.parse:([C)Ljava/math/BigDecimal;
            areturn
        end local 2 // int len
        end local 1 // int off
        end local 0 // char[] chars
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    3     0  chars  [C
            0    3     1    off  I
            0    3     2    len  I
    MethodParameters:
       Name  Flags
      chars  
      off    
      len    

  public static java.math.BigDecimal parse(char[]);
    descriptor: ([C)Ljava/math/BigDecimal;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=6, locals=4, args_size=1
        start local 0 // char[] chars
         0: .line 42
            aload 0 /* chars */
            arraylength
            istore 1 /* len */
        start local 1 // int len
         1: .line 44
            iload 1 /* len */
            sipush 500
            if_icmpge 4
         2: .line 45
            new java.math.BigDecimal
            dup
            aload 0 /* chars */
            invokespecial java.math.BigDecimal.<init>:([C)V
         3: areturn
         4: .line 47
      StackMap locals: int
      StackMap stack:
            new com.fasterxml.jackson.core.io.BigDecimalParser
            dup
            aload 0 /* chars */
            invokespecial com.fasterxml.jackson.core.io.BigDecimalParser.<init>:([C)V
            iload 1 /* len */
            bipush 10
            idiv
            invokevirtual com.fasterxml.jackson.core.io.BigDecimalParser.parseBigDecimal:(I)Ljava/math/BigDecimal;
         5: areturn
         6: .line 48
      StackMap locals:
      StackMap stack: java.lang.NumberFormatException
            astore 2 /* e */
        start local 2 // java.lang.NumberFormatException e
         7: .line 49
            aload 2 /* e */
            invokevirtual java.lang.NumberFormatException.getMessage:()Ljava/lang/String;
            astore 3 /* desc */
        start local 3 // java.lang.String desc
         8: .line 51
            aload 3 /* desc */
            ifnonnull 10
         9: .line 52
            ldc "Not a valid number representation"
            astore 3 /* desc */
        10: .line 54
      StackMap locals: java.lang.NumberFormatException java.lang.String
      StackMap stack:
            new java.lang.NumberFormatException
            dup
            new java.lang.StringBuilder
            dup
            ldc "Value \""
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            new java.lang.String
            dup
            aload 0 /* chars */
            invokespecial java.lang.String.<init>:([C)V
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
        11: .line 55
            ldc "\" can not be represented as `java.math.BigDecimal`, reason: "
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            aload 3 /* desc */
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
        12: .line 54
            invokespecial java.lang.NumberFormatException.<init>:(Ljava/lang/String;)V
            athrow
        end local 3 // java.lang.String desc
        end local 2 // java.lang.NumberFormatException e
        end local 1 // int len
        end local 0 // char[] chars
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0   13     0  chars  [C
            1   13     1    len  I
            7   13     2      e  Ljava/lang/NumberFormatException;
            8   13     3   desc  Ljava/lang/String;
      Exception table:
        from    to  target  type
           1     3       6  Class java.lang.NumberFormatException
           4     5       6  Class java.lang.NumberFormatException
    MethodParameters:
       Name  Flags
      chars  

  private java.math.BigDecimal parseBigDecimal(int);
    descriptor: (I)Ljava/math/BigDecimal;
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=6, locals=17, args_size=2
        start local 0 // com.fasterxml.jackson.core.io.BigDecimalParser this
        start local 1 // int splitLen
         0: .line 60
            iconst_0
            istore 2 /* numHasSign */
        start local 2 // boolean numHasSign
         1: .line 61
            iconst_0
            istore 3 /* expHasSign */
        start local 3 // boolean expHasSign
         2: .line 62
            iconst_0
            istore 4 /* neg */
        start local 4 // boolean neg
         3: .line 63
            iconst_0
            istore 5 /* numIdx */
        start local 5 // int numIdx
         4: .line 64
            iconst_m1
            istore 6 /* expIdx */
        start local 6 // int expIdx
         5: .line 65
            iconst_m1
            istore 7 /* dotIdx */
        start local 7 // int dotIdx
         6: .line 66
            iconst_0
            istore 8 /* scale */
        start local 8 // int scale
         7: .line 67
            aload 0 /* this */
            getfield com.fasterxml.jackson.core.io.BigDecimalParser.chars:[C
            arraylength
            istore 9 /* len */
        start local 9 // int len
         8: .line 69
            iconst_0
            istore 10 /* i */
        start local 10 // int i
         9: goto 44
        10: .line 70
      StackMap locals: com.fasterxml.jackson.core.io.BigDecimalParser int int int int int int int int int int
      StackMap stack:
            aload 0 /* this */
            getfield com.fasterxml.jackson.core.io.BigDecimalParser.chars:[C
            iload 10 /* i */
            caload
            istore 11 /* c */
        start local 11 // char c
        11: .line 71
            iload 11 /* c */
            lookupswitch { // 5
                   43: 12
                   45: 22
                   46: 37
                   69: 33
                  101: 33
              default: 41
          }
        12: .line 73
      StackMap locals: int
      StackMap stack:
            iload 6 /* expIdx */
            iflt 17
        13: .line 74
            iload 3 /* expHasSign */
            ifeq 15
        14: .line 75
            new java.lang.NumberFormatException
            dup
            ldc "Multiple signs in exponent"
            invokespecial java.lang.NumberFormatException.<init>:(Ljava/lang/String;)V
            athrow
        15: .line 77
      StackMap locals:
      StackMap stack:
            iconst_1
            istore 3 /* expHasSign */
        16: .line 78
            goto 43
        17: .line 79
      StackMap locals:
      StackMap stack:
            iload 2 /* numHasSign */
            ifeq 19
        18: .line 80
            new java.lang.NumberFormatException
            dup
            ldc "Multiple signs in number"
            invokespecial java.lang.NumberFormatException.<init>:(Ljava/lang/String;)V
            athrow
        19: .line 82
      StackMap locals:
      StackMap stack:
            iconst_1
            istore 2 /* numHasSign */
        20: .line 83
            iload 10 /* i */
            iconst_1
            iadd
            istore 5 /* numIdx */
        21: .line 85
            goto 43
        22: .line 87
      StackMap locals:
      StackMap stack:
            iload 6 /* expIdx */
            iflt 27
        23: .line 88
            iload 3 /* expHasSign */
            ifeq 25
        24: .line 89
            new java.lang.NumberFormatException
            dup
            ldc "Multiple signs in exponent"
            invokespecial java.lang.NumberFormatException.<init>:(Ljava/lang/String;)V
            athrow
        25: .line 91
      StackMap locals:
      StackMap stack:
            iconst_1
            istore 3 /* expHasSign */
        26: .line 92
            goto 43
        27: .line 93
      StackMap locals:
      StackMap stack:
            iload 2 /* numHasSign */
            ifeq 29
        28: .line 94
            new java.lang.NumberFormatException
            dup
            ldc "Multiple signs in number"
            invokespecial java.lang.NumberFormatException.<init>:(Ljava/lang/String;)V
            athrow
        29: .line 96
      StackMap locals:
      StackMap stack:
            iconst_1
            istore 2 /* numHasSign */
        30: .line 97
            iconst_1
            istore 4 /* neg */
        31: .line 98
            iload 10 /* i */
            iconst_1
            iadd
            istore 5 /* numIdx */
        32: .line 100
            goto 43
        33: .line 103
      StackMap locals:
      StackMap stack:
            iload 6 /* expIdx */
            iflt 35
        34: .line 104
            new java.lang.NumberFormatException
            dup
            ldc "Multiple exponent markers"
            invokespecial java.lang.NumberFormatException.<init>:(Ljava/lang/String;)V
            athrow
        35: .line 106
      StackMap locals:
      StackMap stack:
            iload 10 /* i */
            istore 6 /* expIdx */
        36: .line 107
            goto 43
        37: .line 109
      StackMap locals:
      StackMap stack:
            iload 7 /* dotIdx */
            iflt 39
        38: .line 110
            new java.lang.NumberFormatException
            dup
            ldc "Multiple decimal points"
            invokespecial java.lang.NumberFormatException.<init>:(Ljava/lang/String;)V
            athrow
        39: .line 112
      StackMap locals:
      StackMap stack:
            iload 10 /* i */
            istore 7 /* dotIdx */
        40: .line 113
            goto 43
        41: .line 115
      StackMap locals:
      StackMap stack:
            iload 7 /* dotIdx */
            iflt 43
            iload 6 /* expIdx */
            iconst_m1
            if_icmpne 43
        42: .line 116
            iinc 8 /* scale */ 1
        end local 11 // char c
        43: .line 69
      StackMap locals:
      StackMap stack:
            iinc 10 /* i */ 1
      StackMap locals:
      StackMap stack:
        44: iload 10 /* i */
            iload 9 /* len */
            if_icmplt 10
        end local 10 // int i
        45: .line 122
            iconst_0
            istore 11 /* exp */
        start local 11 // int exp
        46: .line 123
            iload 6 /* expIdx */
            iflt 52
        47: .line 124
            iload 6 /* expIdx */
            istore 10 /* numEndIdx */
        start local 10 // int numEndIdx
        48: .line 125
            new java.lang.String
            dup
            aload 0 /* this */
            getfield com.fasterxml.jackson.core.io.BigDecimalParser.chars:[C
            iload 6 /* expIdx */
            iconst_1
            iadd
            iload 9 /* len */
            iload 6 /* expIdx */
            isub
            iconst_1
            isub
            invokespecial java.lang.String.<init>:([CII)V
            astore 12 /* expStr */
        start local 12 // java.lang.String expStr
        49: .line 126
            aload 12 /* expStr */
            invokestatic java.lang.Integer.parseInt:(Ljava/lang/String;)I
            istore 11 /* exp */
        50: .line 127
            aload 0 /* this */
            iload 8 /* scale */
            iload 11 /* exp */
            i2l
            invokevirtual com.fasterxml.jackson.core.io.BigDecimalParser.adjustScale:(IJ)I
            istore 8 /* scale */
        end local 12 // java.lang.String expStr
        51: .line 128
            goto 53
        end local 10 // int numEndIdx
        52: .line 129
      StackMap locals: com.fasterxml.jackson.core.io.BigDecimalParser int int int int int int int int int top int
      StackMap stack:
            iload 9 /* len */
            istore 10 /* numEndIdx */
        start local 10 // int numEndIdx
        53: .line 134
      StackMap locals: com.fasterxml.jackson.core.io.BigDecimalParser int int int int int int int int int int int
      StackMap stack:
            iload 7 /* dotIdx */
            iflt 60
        54: .line 135
            iload 7 /* dotIdx */
            iload 5 /* numIdx */
            isub
            istore 13 /* leftLen */
        start local 13 // int leftLen
        55: .line 136
            aload 0 /* this */
            iload 5 /* numIdx */
            iload 13 /* leftLen */
            iload 11 /* exp */
            iload 1 /* splitLen */
            invokevirtual com.fasterxml.jackson.core.io.BigDecimalParser.toBigDecimalRec:(IIII)Ljava/math/BigDecimal;
            astore 14 /* left */
        start local 14 // java.math.BigDecimal left
        56: .line 138
            iload 10 /* numEndIdx */
            iload 7 /* dotIdx */
            isub
            iconst_1
            isub
            istore 15 /* rightLen */
        start local 15 // int rightLen
        57: .line 139
            aload 0 /* this */
            iload 7 /* dotIdx */
            iconst_1
            iadd
            iload 15 /* rightLen */
            iload 11 /* exp */
            iload 15 /* rightLen */
            isub
            iload 1 /* splitLen */
            invokevirtual com.fasterxml.jackson.core.io.BigDecimalParser.toBigDecimalRec:(IIII)Ljava/math/BigDecimal;
            astore 16 /* right */
        start local 16 // java.math.BigDecimal right
        58: .line 141
            aload 14 /* left */
            aload 16 /* right */
            invokevirtual java.math.BigDecimal.add:(Ljava/math/BigDecimal;)Ljava/math/BigDecimal;
            astore 12 /* res */
        end local 16 // java.math.BigDecimal right
        end local 15 // int rightLen
        end local 14 // java.math.BigDecimal left
        end local 13 // int leftLen
        start local 12 // java.math.BigDecimal res
        59: .line 142
            goto 61
        end local 12 // java.math.BigDecimal res
        60: .line 143
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            iload 5 /* numIdx */
            iload 10 /* numEndIdx */
            iload 5 /* numIdx */
            isub
            iload 11 /* exp */
            iload 1 /* splitLen */
            invokevirtual com.fasterxml.jackson.core.io.BigDecimalParser.toBigDecimalRec:(IIII)Ljava/math/BigDecimal;
            astore 12 /* res */
        start local 12 // java.math.BigDecimal res
        61: .line 146
      StackMap locals: java.math.BigDecimal
      StackMap stack:
            iload 8 /* scale */
            ifeq 63
        62: .line 147
            aload 12 /* res */
            iload 8 /* scale */
            invokevirtual java.math.BigDecimal.setScale:(I)Ljava/math/BigDecimal;
            astore 12 /* res */
        63: .line 150
      StackMap locals:
      StackMap stack:
            iload 4 /* neg */
            ifeq 65
        64: .line 151
            aload 12 /* res */
            invokevirtual java.math.BigDecimal.negate:()Ljava/math/BigDecimal;
            astore 12 /* res */
        65: .line 154
      StackMap locals:
      StackMap stack:
            aload 12 /* res */
            areturn
        end local 12 // java.math.BigDecimal res
        end local 11 // int exp
        end local 10 // int numEndIdx
        end local 9 // int len
        end local 8 // int scale
        end local 7 // int dotIdx
        end local 6 // int expIdx
        end local 5 // int numIdx
        end local 4 // boolean neg
        end local 3 // boolean expHasSign
        end local 2 // boolean numHasSign
        end local 1 // int splitLen
        end local 0 // com.fasterxml.jackson.core.io.BigDecimalParser this
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0   66     0        this  Lcom/fasterxml/jackson/core/io/BigDecimalParser;
            0   66     1    splitLen  I
            1   66     2  numHasSign  Z
            2   66     3  expHasSign  Z
            3   66     4         neg  Z
            4   66     5      numIdx  I
            5   66     6      expIdx  I
            6   66     7      dotIdx  I
            7   66     8       scale  I
            8   66     9         len  I
            9   45    10           i  I
           11   43    11           c  C
           48   52    10   numEndIdx  I
           53   66    10   numEndIdx  I
           46   66    11         exp  I
           49   51    12      expStr  Ljava/lang/String;
           59   60    12         res  Ljava/math/BigDecimal;
           61   66    12         res  Ljava/math/BigDecimal;
           55   59    13     leftLen  I
           56   59    14        left  Ljava/math/BigDecimal;
           57   59    15    rightLen  I
           58   59    16       right  Ljava/math/BigDecimal;
    MethodParameters:
          Name  Flags
      splitLen  final

  private int adjustScale(int, long);
    descriptor: (IJ)I
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=5, locals=6, args_size=3
        start local 0 // com.fasterxml.jackson.core.io.BigDecimalParser this
        start local 1 // int scale
        start local 2 // long exp
         0: .line 158
            iload 1 /* scale */
            i2l
            lload 2 /* exp */
            lsub
            lstore 4 /* adjScale */
        start local 4 // long adjScale
         1: .line 159
            lload 4 /* adjScale */
            ldc 2147483647
            lcmp
            ifgt 2
            lload 4 /* adjScale */
            ldc -2147483648
            lcmp
            ifge 5
         2: .line 160
      StackMap locals: long
      StackMap stack:
            new java.lang.NumberFormatException
            dup
         3: .line 161
            new java.lang.StringBuilder
            dup
            ldc "Scale out of range: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            lload 4 /* adjScale */
            invokevirtual java.lang.StringBuilder.append:(J)Ljava/lang/StringBuilder;
            ldc " while adjusting scale "
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            iload 1 /* scale */
            invokevirtual java.lang.StringBuilder.append:(I)Ljava/lang/StringBuilder;
            ldc " to exponent "
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            lload 2 /* exp */
            invokevirtual java.lang.StringBuilder.append:(J)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
         4: .line 160
            invokespecial java.lang.NumberFormatException.<init>:(Ljava/lang/String;)V
            athrow
         5: .line 164
      StackMap locals:
      StackMap stack:
            lload 4 /* adjScale */
            l2i
            ireturn
        end local 4 // long adjScale
        end local 2 // long exp
        end local 1 // int scale
        end local 0 // com.fasterxml.jackson.core.io.BigDecimalParser this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    6     0      this  Lcom/fasterxml/jackson/core/io/BigDecimalParser;
            0    6     1     scale  I
            0    6     2       exp  J
            1    6     4  adjScale  J
    MethodParameters:
       Name  Flags
      scale  
      exp    

  private java.math.BigDecimal toBigDecimalRec(int, int, int, int);
    descriptor: (IIII)Ljava/math/BigDecimal;
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=5, locals=8, args_size=5
        start local 0 // com.fasterxml.jackson.core.io.BigDecimalParser this
        start local 1 // int off
        start local 2 // int len
        start local 3 // int scale
        start local 4 // int splitLen
         0: .line 168
            iload 2 /* len */
            iload 4 /* splitLen */
            if_icmple 5
         1: .line 169
            iload 2 /* len */
            iconst_2
            idiv
            istore 5 /* mid */
        start local 5 // int mid
         2: .line 170
            aload 0 /* this */
            iload 1 /* off */
            iload 5 /* mid */
            iload 3 /* scale */
            iload 2 /* len */
            iadd
            iload 5 /* mid */
            isub
            iload 4 /* splitLen */
            invokevirtual com.fasterxml.jackson.core.io.BigDecimalParser.toBigDecimalRec:(IIII)Ljava/math/BigDecimal;
            astore 6 /* left */
        start local 6 // java.math.BigDecimal left
         3: .line 171
            aload 0 /* this */
            iload 1 /* off */
            iload 5 /* mid */
            iadd
            iload 2 /* len */
            iload 5 /* mid */
            isub
            iload 3 /* scale */
            iload 4 /* splitLen */
            invokevirtual com.fasterxml.jackson.core.io.BigDecimalParser.toBigDecimalRec:(IIII)Ljava/math/BigDecimal;
            astore 7 /* right */
        start local 7 // java.math.BigDecimal right
         4: .line 173
            aload 6 /* left */
            aload 7 /* right */
            invokevirtual java.math.BigDecimal.add:(Ljava/math/BigDecimal;)Ljava/math/BigDecimal;
            areturn
        end local 7 // java.math.BigDecimal right
        end local 6 // java.math.BigDecimal left
        end local 5 // int mid
         5: .line 176
      StackMap locals:
      StackMap stack:
            iload 2 /* len */
            ifne 6
            getstatic java.math.BigDecimal.ZERO:Ljava/math/BigDecimal;
            goto 7
      StackMap locals:
      StackMap stack:
         6: new java.math.BigDecimal
            dup
            aload 0 /* this */
            getfield com.fasterxml.jackson.core.io.BigDecimalParser.chars:[C
            iload 1 /* off */
            iload 2 /* len */
            invokespecial java.math.BigDecimal.<init>:([CII)V
            iload 3 /* scale */
            invokevirtual java.math.BigDecimal.movePointRight:(I)Ljava/math/BigDecimal;
      StackMap locals:
      StackMap stack: java.math.BigDecimal
         7: areturn
        end local 4 // int splitLen
        end local 3 // int scale
        end local 2 // int len
        end local 1 // int off
        end local 0 // com.fasterxml.jackson.core.io.BigDecimalParser this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    8     0      this  Lcom/fasterxml/jackson/core/io/BigDecimalParser;
            0    8     1       off  I
            0    8     2       len  I
            0    8     3     scale  I
            0    8     4  splitLen  I
            2    5     5       mid  I
            3    5     6      left  Ljava/math/BigDecimal;
            4    5     7     right  Ljava/math/BigDecimal;
    MethodParameters:
          Name  Flags
      off       
      len       
      scale     
      splitLen  
}
SourceFile: "BigDecimalParser.java"