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<?php const INT_SIGNED = 1; const INT_LE = 2; function is32Bit() { $test = unpack('N', "\xFF\xFF\xFF\xFF"); return $test[1] === -1; } function unpack_int32($str, $flags = 0) { $length = strlen($str); if ($length < 4) { return false; } else if ($length > 4) { $str = substr($str, 0, 4); } if ($flags & INT_LE) { $str = strrev($str); } $result = unpack('N', $str); $result = current($result); $signBit = (bool) ($result & 0x80000000); $isSigned = (bool) ($flags & INT_SIGNED); $is32bit = is32Bit(); if ($signBit && $isSigned && !$is32bit) { $result = 0xFFFFFFFF00000000 | $result; } else if ($signBit && !$isSigned && $is32bit) { $result = (($result & 0x7FFFFFFF) * 2) + ~$result + 1; } return $result; } function unpack_int64($str, $flags = 0) { $length = strlen($str); if ($length < 8) { return false; } else if ($length > 8) { $str = substr($str, 0, 8); } $is32bit = is32Bit(); if ($flags & INT_LE) { $str = strrev($str); } $longs = array_values(unpack('NN', substr($str, 0, 4), substr($str, 4, 4))); $signBit = (bool) ($longs[0] & 0x80000000); if (PHP_INT_MAX > 0x7FFFFFFF) { $result = ($longs[0] << 32) | $longs[1]; if ($signBit) { $result = (($result & 0x7FFFFFFFFFFFFFFF) * 2) + ~$result + 1; } } return $result; } var_dump(unpack_int32("\x81\x00\x00\x80", INT_SIGNED | INT_LE));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/RkV43
function name:  (null)
number of ops:  13
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   DECLARE_CONST                                            'INT_SIGNED', 1
    4     1        DECLARE_CONST                                            'INT_LE', 2
   65     2        INIT_FCALL                                               'var_dump'
          3        INIT_FCALL                                               'unpack_int32'
          4        SEND_VAL                                                 '%81%00%00%80'
          5        FETCH_CONSTANT                                   ~0      'INT_SIGNED'
          6        FETCH_CONSTANT                                   ~1      'INT_LE'
          7        BW_OR                                            ~2      ~0, ~1
          8        SEND_VAL                                                 ~2
          9        DO_FCALL                                      0  $3      
         10        SEND_VAR                                                 $3
         11        DO_ICALL                                                 
         12      > RETURN                                                   1

Function is32bit:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/RkV43
function name:  is32Bit
number of ops:  9
compiled vars:  !0 = $test
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    7     0  E >   INIT_FCALL                                               'unpack'
          1        SEND_VAL                                                 'N'
          2        SEND_VAL                                                 '%FF%FF%FF%FF'
          3        DO_ICALL                                         $1      
          4        ASSIGN                                                   !0, $1
    8     5        FETCH_DIM_R                                      ~3      !0, 1
          6        IS_IDENTICAL                                     ~4      ~3, -1
          7      > RETURN                                                   ~4
    9     8*     > RETURN                                                   null

End of function is32bit

Function unpack_int32:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 6, Position 2 = 8
Branch analysis from position: 6
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 8
2 jumps found. (Code = 43) Position 1 = 10, Position 2 = 16
Branch analysis from position: 10
2 jumps found. (Code = 43) Position 1 = 19, Position 2 = 23
Branch analysis from position: 19
2 jumps found. (Code = 46) Position 1 = 43, Position 2 = 44
Branch analysis from position: 43
2 jumps found. (Code = 46) Position 1 = 45, Position 2 = 47
Branch analysis from position: 45
2 jumps found. (Code = 43) Position 1 = 48, Position 2 = 51
Branch analysis from position: 48
1 jumps found. (Code = 42) Position 1 = 63
Branch analysis from position: 63
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 51
2 jumps found. (Code = 46) Position 1 = 52, Position 2 = 54
Branch analysis from position: 52
2 jumps found. (Code = 46) Position 1 = 55, Position 2 = 56
Branch analysis from position: 55
2 jumps found. (Code = 43) Position 1 = 57, Position 2 = 63
Branch analysis from position: 57
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 63
Branch analysis from position: 56
Branch analysis from position: 54
Branch analysis from position: 47
Branch analysis from position: 44
Branch analysis from position: 23
Branch analysis from position: 16
filename:       /in/RkV43
function name:  unpack_int32
number of ops:  65
compiled vars:  !0 = $str, !1 = $flags, !2 = $length, !3 = $result, !4 = $signBit, !5 = $isSigned, !6 = $is32bit
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   11     0  E >   RECV                                             !0      
          1        RECV_INIT                                        !1      0
   12     2        STRLEN                                           ~7      !0
          3        ASSIGN                                                   !2, ~7
   13     4        IS_SMALLER                                               !2, 4
          5      > JMPZ                                                     ~9, ->8
   14     6    > > RETURN                                                   <false>
          7*       JMP                                                      ->16
   15     8    >   IS_SMALLER                                               4, !2
          9      > JMPZ                                                     ~10, ->16
   16    10    >   INIT_FCALL                                               'substr'
         11        SEND_VAR                                                 !0
         12        SEND_VAL                                                 0
         13        SEND_VAL                                                 4
         14        DO_ICALL                                         $11     
         15        ASSIGN                                                   !0, $11
   19    16    >   FETCH_CONSTANT                                   ~13     'INT_LE'
         17        BW_AND                                           ~14     !1, ~13
         18      > JMPZ                                                     ~14, ->23
   20    19    >   INIT_FCALL                                               'strrev'
         20        SEND_VAR                                                 !0
         21        DO_ICALL                                         $15     
         22        ASSIGN                                                   !0, $15
   22    23    >   INIT_FCALL                                               'unpack'
         24        SEND_VAL                                                 'N'
         25        SEND_VAR                                                 !0
         26        DO_ICALL                                         $17     
         27        ASSIGN                                                   !3, $17
   23    28        INIT_FCALL                                               'current'
         29        SEND_VAR                                                 !3
         30        DO_ICALL                                         $19     
         31        ASSIGN                                                   !3, $19
   25    32        BW_AND                                           ~21     !3, 2147483648
         33        BOOL                                             ~22     ~21
         34        ASSIGN                                                   !4, ~22
   26    35        FETCH_CONSTANT                                   ~24     'INT_SIGNED'
         36        BW_AND                                           ~25     !1, ~24
         37        BOOL                                             ~26     ~25
         38        ASSIGN                                                   !5, ~26
   27    39        INIT_FCALL                                               'is32bit'
         40        DO_FCALL                                      0  $28     
         41        ASSIGN                                                   !6, $28
   29    42      > JMPZ_EX                                          ~30     !4, ->44
         43    >   BOOL                                             ~30     !5
         44    > > JMPZ_EX                                          ~30     ~30, ->47
         45    >   BOOL_NOT                                         ~31     !6
         46        BOOL                                             ~30     ~31
         47    > > JMPZ                                                     ~30, ->51
   30    48    >   BW_OR                                            ~32     !3, 1.84467e+19
         49        ASSIGN                                                   !3, ~32
         50      > JMP                                                      ->63
   31    51    > > JMPZ_EX                                          ~34     !4, ->54
         52    >   BOOL_NOT                                         ~35     !5
         53        BOOL                                             ~34     ~35
         54    > > JMPZ_EX                                          ~34     ~34, ->56
         55    >   BOOL                                             ~34     !6
         56    > > JMPZ                                                     ~34, ->63
   32    57    >   BW_AND                                           ~36     !3, 2147483647
         58        MUL                                              ~37     ~36, 2
         59        BW_NOT                                           ~38     !3
         60        ADD                                              ~39     ~37, ~38
         61        ADD                                              ~40     ~39, 1
         62        ASSIGN                                                   !3, ~40
   35    63    > > RETURN                                                   !3
   36    64*     > RETURN                                                   null

End of function unpack_int32

Function unpack_int64:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 6, Position 2 = 8
Branch analysis from position: 6
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 8
2 jumps found. (Code = 43) Position 1 = 10, Position 2 = 16
Branch analysis from position: 10
2 jumps found. (Code = 43) Position 1 = 22, Position 2 = 26
Branch analysis from position: 22
2 jumps found. (Code = 43) Position 1 = 50, Position 2 = 62
Branch analysis from position: 50
2 jumps found. (Code = 43) Position 1 = 56, Position 2 = 62
Branch analysis from position: 56
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 62
Branch analysis from position: 62
Branch analysis from position: 26
Branch analysis from position: 16
filename:       /in/RkV43
function name:  unpack_int64
number of ops:  64
compiled vars:  !0 = $str, !1 = $flags, !2 = $length, !3 = $is32bit, !4 = $longs, !5 = $signBit, !6 = $result
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   38     0  E >   RECV                                             !0      
          1        RECV_INIT                                        !1      0
   39     2        STRLEN                                           ~7      !0
          3        ASSIGN                                                   !2, ~7
   40     4        IS_SMALLER                                               !2, 8
          5      > JMPZ                                                     ~9, ->8
   41     6    > > RETURN                                                   <false>
          7*       JMP                                                      ->16
   42     8    >   IS_SMALLER                                               8, !2
          9      > JMPZ                                                     ~10, ->16
   43    10    >   INIT_FCALL                                               'substr'
         11        SEND_VAR                                                 !0
         12        SEND_VAL                                                 0
         13        SEND_VAL                                                 8
         14        DO_ICALL                                         $11     
         15        ASSIGN                                                   !0, $11
   46    16    >   INIT_FCALL                                               'is32bit'
         17        DO_FCALL                                      0  $13     
         18        ASSIGN                                                   !3, $13
   48    19        FETCH_CONSTANT                                   ~15     'INT_LE'
         20        BW_AND                                           ~16     !1, ~15
         21      > JMPZ                                                     ~16, ->26
   49    22    >   INIT_FCALL                                               'strrev'
         23        SEND_VAR                                                 !0
         24        DO_ICALL                                         $17     
         25        ASSIGN                                                   !0, $17
   51    26    >   INIT_FCALL                                               'array_values'
         27        INIT_FCALL                                               'unpack'
         28        SEND_VAL                                                 'NN'
         29        INIT_FCALL                                               'substr'
         30        SEND_VAR                                                 !0
         31        SEND_VAL                                                 0
         32        SEND_VAL                                                 4
         33        DO_ICALL                                         $19     
         34        SEND_VAR                                                 $19
         35        INIT_FCALL                                               'substr'
         36        SEND_VAR                                                 !0
         37        SEND_VAL                                                 4
         38        SEND_VAL                                                 4
         39        DO_ICALL                                         $20     
         40        SEND_VAR                                                 $20
         41        DO_ICALL                                         $21     
         42        SEND_VAR                                                 $21
         43        DO_ICALL                                         $22     
         44        ASSIGN                                                   !4, $22
   53    45        FETCH_DIM_R                                      ~24     !4, 0
         46        BW_AND                                           ~25     ~24, 2147483648
         47        BOOL                                             ~26     ~25
         48        ASSIGN                                                   !5, ~26
   55    49      > JMPZ                                                     <true>, ->62
   56    50    >   FETCH_DIM_R                                      ~28     !4, 0
         51        SL                                               ~29     ~28, 32
         52        FETCH_DIM_R                                      ~30     !4, 1
         53        BW_OR                                            ~31     ~29, ~30
         54        ASSIGN                                                   !6, ~31
   57    55      > JMPZ                                                     !5, ->62
   58    56    >   BW_AND                                           ~33     !6, 9223372036854775807
         57        MUL                                              ~34     ~33, 2
         58        BW_NOT                                           ~35     !6
         59        ADD                                              ~36     ~34, ~35
         60        ADD                                              ~37     ~36, 1
         61        ASSIGN                                                   !6, ~37
   62    62    > > RETURN                                                   !6
   63    63*     > RETURN                                                   null

End of function unpack_int64

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
155.3 ms | 1402 KiB | 28 Q