unipdf/internal/jbig2/decoder/arithmetic/arithmetic.go

//
// Copyright 2020 FoxyUtils ehf. All rights reserved.
//
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//
// DO NOT EDIT: generated by unitwist Go source code obfuscator.
//
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package arithmetic ;import (_da "fmt";_e "github.com/unidoc/unipdf/v3/common";_bc "github.com/unidoc/unipdf/v3/internal/bitwise";_bce "github.com/unidoc/unipdf/v3/internal/jbig2/internal";_c "io";_d "strings";);func New (r *_bc .Reader )(*Decoder ,error ){_cc :=&Decoder {_dd :r ,ContextSize :[]uint32 {16,13,10,10},ReferedToContextSize :[]uint32 {13,10}};
if _fa :=_cc .init ();_fa !=nil {return nil ,_fa ;};return _cc ,nil ;};func (_fc *Decoder )DecodeBit (stats *DecoderStats )(int ,error ){var (_ff int ;_ed =_f [stats .cx ()][0];_ge =int32 (stats .cx ()););defer func (){_fc ._bd ++}();_fc ._dg -=_ed ;if (_fc ._bf >>16)< uint64 (_ed ){_ff =_fc .lpsExchange (stats ,_ge ,_ed );
if _be :=_fc .renormalize ();_be !=nil {return 0,_be ;};}else {_fc ._bf -=uint64 (_ed )<<16;if (_fc ._dg &0x8000)==0{_ff =_fc .mpsExchange (stats ,_ge );if _fg :=_fc .renormalize ();_fg !=nil {return 0,_fg ;};}else {_ff =int (stats .getMps ());};};return _ff ,nil ;
};var (_f =[][4]uint32 {{0x5601,1,1,1},{0x3401,2,6,0},{0x1801,3,9,0},{0x0AC1,4,12,0},{0x0521,5,29,0},{0x0221,38,33,0},{0x5601,7,6,1},{0x5401,8,14,0},{0x4801,9,14,0},{0x3801,10,14,0},{0x3001,11,17,0},{0x2401,12,18,0},{0x1C01,13,20,0},{0x1601,29,21,0},{0x5601,15,14,1},{0x5401,16,14,0},{0x5101,17,15,0},{0x4801,18,16,0},{0x3801,19,17,0},{0x3401,20,18,0},{0x3001,21,19,0},{0x2801,22,19,0},{0x2401,23,20,0},{0x2201,24,21,0},{0x1C01,25,22,0},{0x1801,26,23,0},{0x1601,27,24,0},{0x1401,28,25,0},{0x1201,29,26,0},{0x1101,30,27,0},{0x0AC1,31,28,0},{0x09C1,32,29,0},{0x08A1,33,30,0},{0x0521,34,31,0},{0x0441,35,32,0},{0x02A1,36,33,0},{0x0221,37,34,0},{0x0141,38,35,0},{0x0111,39,36,0},{0x0085,40,37,0},{0x0049,41,38,0},{0x0025,42,39,0},{0x0015,43,40,0},{0x0009,44,41,0},{0x0005,45,42,0},{0x0001,45,43,0},{0x5601,46,46,0}};
);type DecoderStats struct{_gd int32 ;_cad int32 ;_dgf []byte ;_eb []byte ;};func (_cb *Decoder )DecodeInt (stats *DecoderStats )(int32 ,error ){var (_fgg ,_gb int32 ;_fb ,_cg ,_bb int ;_bee error ;);if stats ==nil {stats =NewStats (512,1);};_cb ._g =1;
_cg ,_bee =_cb .decodeIntBit (stats );if _bee !=nil {return 0,_bee ;};_fb ,_bee =_cb .decodeIntBit (stats );if _bee !=nil {return 0,_bee ;};if _fb ==1{_fb ,_bee =_cb .decodeIntBit (stats );if _bee !=nil {return 0,_bee ;};if _fb ==1{_fb ,_bee =_cb .decodeIntBit (stats );
if _bee !=nil {return 0,_bee ;};if _fb ==1{_fb ,_bee =_cb .decodeIntBit (stats );if _bee !=nil {return 0,_bee ;};if _fb ==1{_fb ,_bee =_cb .decodeIntBit (stats );if _bee !=nil {return 0,_bee ;};if _fb ==1{_bb =32;_gb =4436;}else {_bb =12;_gb =340;};}else {_bb =8;
_gb =84;};}else {_bb =6;_gb =20;};}else {_bb =4;_gb =4;};}else {_bb =2;_gb =0;};for _bdg :=0;_bdg < _bb ;_bdg ++{_fb ,_bee =_cb .decodeIntBit (stats );if _bee !=nil {return 0,_bee ;};_fgg =(_fgg <<1)|int32 (_fb );};_fgg +=_gb ;if _cg ==0{return _fgg ,nil ;
}else if _cg ==1&&_fgg > 0{return -_fgg ,nil ;};return 0,_bce .ErrOOB ;};func (_cd *Decoder )readByte ()error {if _cd ._dd .AbsolutePosition ()> _cd ._cf {if _ ,_ad :=_cd ._dd .Seek (-1,_c .SeekCurrent );_ad !=nil {return _ad ;};};_fd ,_ca :=_cd ._dd .ReadByte ();
if _ca !=nil {return _ca ;};_cd ._bg =_fd ;if _cd ._bg ==0xFF{_gc ,_df :=_cd ._dd .ReadByte ();if _df !=nil {return _df ;};if _gc > 0x8F{_cd ._bf +=0xFF00;_cd ._ce =8;if _ ,_daf :=_cd ._dd .Seek (-2,_c .SeekCurrent );_daf !=nil {return _daf ;};}else {_cd ._bf +=uint64 (_gc )<<9;
_cd ._ce =7;};}else {_fd ,_ca =_cd ._dd .ReadByte ();if _ca !=nil {return _ca ;};_cd ._bg =_fd ;_cd ._bf +=uint64 (_cd ._bg )<<8;_cd ._ce =8;};_cd ._bf &=0xFFFFFFFFFF;return nil ;};func (_db *Decoder )init ()error {_db ._cf =_db ._dd .AbsolutePosition ();
_dc ,_dgb :=_db ._dd .ReadByte ();if _dgb !=nil {_e .Log .Debug ("B\u0075\u0066\u0066\u0065\u0072\u0030 \u0072\u0065\u0061\u0064\u0042\u0079\u0074\u0065\u0020f\u0061\u0069\u006ce\u0064.\u0020\u0025\u0076",_dgb );return _dgb ;};_db ._bg =_dc ;_db ._bf =uint64 (_dc )<<16;
if _dgb =_db .readByte ();_dgb !=nil {return _dgb ;};_db ._bf <<=7;_db ._ce -=7;_db ._dg =0x8000;_db ._bd ++;return nil ;};func (_bbg *DecoderStats )SetIndex (index int32 ){_bbg ._gd =index };type Decoder struct{ContextSize []uint32 ;ReferedToContextSize []uint32 ;
_dd *_bc .Reader ;_bg uint8 ;_bf uint64 ;_dg uint32 ;_g int64 ;_ce int32 ;_bd int32 ;_cf int64 ;};func (_ccd *Decoder )decodeIntBit (_dbc *DecoderStats )(int ,error ){_dbc .SetIndex (int32 (_ccd ._g ));_bdf ,_fcc :=_ccd .DecodeBit (_dbc );if _fcc !=nil {_e .Log .Debug ("\u0041\u0072\u0069\u0074\u0068\u006d\u0065t\u0069\u0063\u0044e\u0063\u006f\u0064e\u0072\u0020'\u0064\u0065\u0063\u006f\u0064\u0065I\u006etB\u0069\u0074\u0027\u002d\u003e\u0020\u0044\u0065\u0063\u006f\u0064\u0065\u0042\u0069\u0074\u0020\u0066\u0061\u0069\u006c\u0065\u0064\u002e\u0020\u0025\u0076",_fcc );
return _bdf ,_fcc ;};if _ccd ._g < 256{_ccd ._g =((_ccd ._g <<uint64 (1))|int64 (_bdf ))&0x1ff;}else {_ccd ._g =(((_ccd ._g <<uint64 (1)|int64 (_bdf ))&511)|256)&0x1ff;};return _bdf ,nil ;};func (_fga *DecoderStats )Reset (){for _egc :=0;_egc < len (_fga ._dgf );
_egc ++{_fga ._dgf [_egc ]=0;_fga ._eb [_egc ]=0;};};func (_beg *DecoderStats )Copy ()*DecoderStats {_ebd :=&DecoderStats {_cad :_beg ._cad ,_dgf :make ([]byte ,_beg ._cad )};copy (_ebd ._dgf ,_beg ._dgf );return _ebd ;};func (_gg *DecoderStats )cx ()byte {return _gg ._dgf [_gg ._gd ]};
func (_gab *DecoderStats )getMps ()byte {return _gab ._eb [_gab ._gd ]};func (_dfe *DecoderStats )toggleMps (){_dfe ._eb [_dfe ._gd ]^=1};func (_cca *DecoderStats )Overwrite (dNew *DecoderStats ){for _ffd :=0;_ffd < len (_cca ._dgf );_ffd ++{_cca ._dgf [_ffd ]=dNew ._dgf [_ffd ];
_cca ._eb [_ffd ]=dNew ._eb [_ffd ];};};func (_bbc *DecoderStats )setEntry (_ea int ){_bfa :=byte (_ea &0x7f);_bbc ._dgf [_bbc ._gd ]=_bfa };func (_bbd *DecoderStats )String ()string {_ebe :=&_d .Builder {};_ebe .WriteString (_da .Sprintf ("S\u0074\u0061\u0074\u0073\u003a\u0020\u0020\u0025\u0064\u000a",len (_bbd ._dgf )));
for _de ,_cec :=range _bbd ._dgf {if _cec !=0{_ebe .WriteString (_da .Sprintf ("N\u006f\u0074\u0020\u007aer\u006f \u0061\u0074\u003a\u0020\u0025d\u0020\u002d\u0020\u0025\u0064\u000a",_de ,_cec ));};};return _ebe .String ();};func (_gcf *Decoder )renormalize ()error {for {if _gcf ._ce ==0{if _dcf :=_gcf .readByte ();
_dcf !=nil {return _dcf ;};};_gcf ._dg <<=1;_gcf ._bf <<=1;_gcf ._ce --;if (_gcf ._dg &0x8000)!=0{break ;};};_gcf ._bf &=0xffffffff;return nil ;};func (_fdb *Decoder )mpsExchange (_dae *DecoderStats ,_dab int32 )int {_fag :=_dae ._eb [_dae ._gd ];if _fdb ._dg < _f [_dab ][0]{if _f [_dab ][3]==1{_dae .toggleMps ();
};_dae .setEntry (int (_f [_dab ][2]));return int (1-_fag );};_dae .setEntry (int (_f [_dab ][1]));return int (_fag );};func (_ef *Decoder )lpsExchange (_bed *DecoderStats ,_eg int32 ,_fcb uint32 )int {_aa :=_bed .getMps ();if _ef ._dg < _fcb {_bed .setEntry (int (_f [_eg ][1]));
_ef ._dg =_fcb ;return int (_aa );};if _f [_eg ][3]==1{_bed .toggleMps ();};_bed .setEntry (int (_f [_eg ][2]));_ef ._dg =_fcb ;return int (1-_aa );};func (_a *Decoder )DecodeIAID (codeLen uint64 ,stats *DecoderStats )(int64 ,error ){_a ._g =1;var _edc uint64 ;
for _edc =0;_edc < codeLen ;_edc ++{stats .SetIndex (int32 (_a ._g ));_ccf ,_ga :=_a .DecodeBit (stats );if _ga !=nil {return 0,_ga ;};_a ._g =(_a ._g <<1)|int64 (_ccf );};_ccg :=_a ._g -(1<<codeLen );return _ccg ,nil ;};func NewStats (contextSize int32 ,index int32 )*DecoderStats {return &DecoderStats {_gd :index ,_cad :contextSize ,_dgf :make ([]byte ,contextSize ),_eb :make ([]byte ,contextSize )};
};