#define FORMAT_VERSION 131
#define NEW_FLOAT_EXT 'F'      // 70  [Float64:IEEE float]
#define BIT_BINARY_EXT 'M'     // 77  [UInt32:Len, UInt8:Bits, Len:Data]
#define SMALL_INTEGER_EXT 'a'  // 97  [UInt8:Int]
#define INTEGER_EXT 'b'        // 98  [Int32:Int]
#define FLOAT_EXT 'c'          // 99  [31:Float String] Float in string format (formatted "%.20e", sscanf "%lf"). Superseded by NEW_FLOAT_EXT
#define ATOM_EXT 'd'           // 100 [UInt16:Len, Len:AtomName] max Len is 255
#define REFERENCE_EXT 'e'      // 101 [atom:Node, UInt32:ID, UInt8:Creation]
#define PORT_EXT 'f'           // 102 [atom:Node, UInt32:ID, UInt8:Creation]
#define PID_EXT 'g'            // 103 [atom:Node, UInt32:ID, UInt32:Serial, UInt8:Creation]
#define SMALL_TUPLE_EXT 'h'    // 104 [UInt8:Arity, N:Elements]
#define LARGE_TUPLE_EXT 'i'    // 105 [UInt32:Arity, N:Elements]
#define NIL_EXT 'j'            // 106 empty list
#define STRING_EXT 'k'         // 107 [UInt16:Len, Len:Characters]
#define LIST_EXT 'l'           // 108 [UInt32:Len, Elements, Tail]
#define BINARY_EXT 'm'         // 109 [UInt32:Len, Len:Data]
#define SMALL_BIG_EXT 'n'      // 110 [UInt8:n, UInt8:Sign, n:nums]
#define LARGE_BIG_EXT 'o'      // 111 [UInt32:n, UInt8:Sign, n:nums]
#define NEW_FUN_EXT 'p'        // 112 [UInt32:Size, UInt8:Arity, 16*Uint6-MD5:Uniq, UInt32:Index, UInt32:NumFree, atom:Module, int:OldIndex, int:OldUniq, pid:Pid, NunFree*ext:FreeVars]
#define EXPORT_EXT 'q'         // 113 [atom:Module, atom:Function, smallint:Arity]
#define NEW_REFERENCE_EXT 'r'  // 114 [UInt16:Len, atom:Node, UInt8:Creation, Len*UInt32:ID]
#define SMALL_ATOM_EXT 's'     // 115 [UInt8:Len, Len:AtomName]
#define MAP_EXT 't'            // 116 [UInt32:Airty, N:Pairs]
#define FUN_EXT 'u'            // 117 [UInt4:NumFree, pid:Pid, atom:Module, int:Index, int:Uniq, NumFree*ext:FreeVars]
#define COMPRESSED 'P'         // 80  [UInt4:UncompressedSize, N:ZlibCompressedData]