github.com/unidoc/unipdf/v3@v3.55.0/internal/jbig2/encoder/arithmetic/arithmetic.go

//
// Copyright 2020 FoxyUtils ehf. All rights reserved.
//
// This is a commercial product and requires a license to operate.
// A trial license can be obtained at https://unidoc.io
//
// DO NOT EDIT: generated by unitwist Go source code obfuscator.
//
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package arithmetic ;import (_f "bytes";_bc "github.com/unidoc/unipdf/v3/common";_ba "github.com/unidoc/unipdf/v3/internal/jbig2/bitmap";_fe "github.com/unidoc/unipdf/v3/internal/jbig2/errors";_fa "io";);type Encoder struct{_bg uint32 ;_gd uint16 ;_ed ,_eb uint8 ;
_cb int ;_fc int ;_bd [][]byte ;_fag []byte ;_cf int ;_cd *codingContext ;_cfa [13]*codingContext ;_fdd *codingContext ;};func (_ff *Encoder )EncodeOOB (proc Class )(_fdad error ){_bc .Log .Trace ("E\u006e\u0063\u006f\u0064\u0065\u0020O\u004f\u0042\u0020\u0077\u0069\u0074\u0068\u0020\u0043l\u0061\u0073\u0073:\u0020'\u0025\u0073\u0027",proc );
if _fdad =_ff .encodeOOB (proc );_fdad !=nil {return _fe .Wrap (_fdad ,"\u0045n\u0063\u006f\u0064\u0065\u004f\u004fB","");};return nil ;};var _ _fa .WriterTo =&Encoder {};func (_ffg *Encoder )encodeInteger (_afe Class ,_cff int )error {const _bagf ="E\u006e\u0063\u006f\u0064er\u002ee\u006e\u0063\u006f\u0064\u0065I\u006e\u0074\u0065\u0067\u0065\u0072";
if _cff > 2000000000||_cff < -2000000000{return _fe .Errorf (_bagf ,"\u0061\u0072\u0069\u0074\u0068\u006d\u0065\u0074i\u0063\u0020\u0065nc\u006f\u0064\u0065\u0072\u0020\u002d \u0069\u006e\u0076\u0061\u006c\u0069\u0064\u0020\u0069\u006e\u0074\u0065\u0067\u0065\u0072 \u0076\u0061\u006c\u0075\u0065\u003a\u0020\u0027%\u0064\u0027",_cff );
};_dccd :=_ffg ._cfa [_afe ];_ce :=uint32 (1);var _gecb int ;for ;;_gecb ++{if _ag [_gecb ]._c <=_cff &&_ag [_gecb ]._a >=_cff {break ;};};if _cff < 0{_cff =-_cff ;};_cff -=int (_ag [_gecb ]._fd );_ceb :=_ag [_gecb ]._fb ;for _ef :=uint8 (0);_ef < _ag [_gecb ]._fac ;
_ef ++{_gbgb :=_ceb &1;if _fddgb :=_ffg .encodeBit (_dccd ,_ce ,_gbgb );_fddgb !=nil {return _fe .Wrap (_fddgb ,_bagf ,"");};_ceb >>=1;if _ce &0x100> 0{_ce =(((_ce <<1)|uint32 (_gbgb ))&0x1ff)|0x100;}else {_ce =(_ce <<1)|uint32 (_gbgb );};};_cff <<=32-_ag [_gecb ]._ac ;
for _badg :=uint8 (0);_badg < _ag [_gecb ]._ac ;_badg ++{_de :=uint8 ((uint32 (_cff )&0x80000000)>>31);if _fddc :=_ffg .encodeBit (_dccd ,_ce ,_de );_fddc !=nil {return _fe .Wrap (_fddc ,_bagf ,"\u006d\u006f\u0076\u0065 \u0064\u0061\u0074\u0061\u0020\u0074\u006f\u0020\u0074\u0068e\u0020t\u006f\u0070\u0020\u006f\u0066\u0020\u0077o\u0072\u0064");
};_cff <<=1;if _ce &0x100!=0{_ce =(((_ce <<1)|uint32 (_de ))&0x1ff)|0x100;}else {_ce =(_ce <<1)|uint32 (_de );};};return nil ;};func (_baf *Encoder )renormalize (){for {_baf ._gd <<=1;_baf ._bg <<=1;_baf ._ed --;if _baf ._ed ==0{_baf .byteOut ();};if (_baf ._gd &0x8000)!=0{break ;
};};};type codingContext struct{_d []byte ;_ca []byte ;};func (_dfd *Encoder )lBlock (){if _dfd ._cb >=0{_dfd .emit ();};_dfd ._cb ++;_dfd ._eb =uint8 (_dfd ._bg >>19);_dfd ._bg &=0x7ffff;_dfd ._ed =8;};func (_ab *Encoder )Init (){_ab ._cd =_ec (_gae );
_ab ._gd =0x8000;_ab ._bg =0;_ab ._ed =12;_ab ._cb =-1;_ab ._eb =0;_ab ._cf =0;_ab ._fag =make ([]byte ,_adae );for _cc :=0;_cc < len (_ab ._cfa );_cc ++{_ab ._cfa [_cc ]=_ec (512);};_ab ._fdd =nil ;};var _ag =[]intEncRangeS {{0,3,0,2,0,2},{-1,-1,9,4,0,0},{-3,-2,5,3,2,1},{4,19,2,3,4,4},{-19,-4,3,3,4,4},{20,83,6,4,20,6},{-83,-20,7,4,20,6},{84,339,14,5,84,8},{-339,-84,15,5,84,8},{340,4435,30,6,340,12},{-4435,-340,31,6,340,12},{4436,2000000000,62,6,4436,32},{-2000000000,-4436,63,6,4436,32}};
func (_ebbd *Encoder )EncodeIAID (symbolCodeLength ,value int )(_edc error ){_bc .Log .Trace ("\u0045\u006e\u0063\u006f\u0064\u0065\u0020\u0049A\u0049\u0044\u002e S\u0079\u006d\u0062\u006f\u006c\u0043o\u0064\u0065\u004c\u0065\u006e\u0067\u0074\u0068\u003a\u0020\u0027\u0025\u0064\u0027\u002c \u0056\u0061\u006c\u0075\u0065\u003a\u0020\u0027%\u0064\u0027",symbolCodeLength ,value );
if _edc =_ebbd .encodeIAID (symbolCodeLength ,value );_edc !=nil {return _fe .Wrap (_edc ,"\u0045\u006e\u0063\u006f\u0064\u0065\u0049\u0041\u0049\u0044","");};return nil ;};const _ebb =0x9b25;func (_ffd *Encoder )setBits (){_daa :=_ffd ._bg +uint32 (_ffd ._gd );
_ffd ._bg |=0xffff;if _ffd ._bg >=_daa {_ffd ._bg -=0x8000;};};type intEncRangeS struct{_c ,_a int ;_fb ,_fac uint8 ;_fd uint16 ;_ac uint8 ;};func (_cde *Encoder )EncodeInteger (proc Class ,value int )(_bad error ){_bc .Log .Trace ("\u0045\u006eco\u0064\u0065\u0020I\u006e\u0074\u0065\u0067er:\u0027%d\u0027\u0020\u0077\u0069\u0074\u0068\u0020Cl\u0061\u0073\u0073\u003a\u0020\u0027\u0025s\u0027",value ,proc );
if _bad =_cde .encodeInteger (proc ,value );_bad !=nil {return _fe .Wrap (_bad ,"\u0045\u006e\u0063\u006f\u0064\u0065\u0049\u006e\u0074\u0065\u0067\u0065\u0072","");};return nil ;};func (_fgb *Encoder )Reset (){_fgb ._gd =0x8000;_fgb ._bg =0;_fgb ._ed =12;
_fgb ._cb =-1;_fgb ._eb =0;_fgb ._fdd =nil ;_fgb ._cd =_ec (_gae );};func (_dge *Encoder )rBlock (){if _dge ._cb >=0{_dge .emit ();};_dge ._cb ++;_dge ._eb =uint8 (_dge ._bg >>20);_dge ._bg &=0xfffff;_dge ._ed =7;};func (_agd *Encoder )EncodeBitmap (bm *_ba .Bitmap ,duplicateLineRemoval bool )error {_bc .Log .Trace ("\u0045n\u0063\u006f\u0064\u0065 \u0042\u0069\u0074\u006d\u0061p\u0020[\u0025d\u0078\u0025\u0064\u005d\u002c\u0020\u0025s",bm .Width ,bm .Height ,bm );
var (_gcd ,_abb uint8 ;_gcc ,_dd ,_bf uint16 ;_dc ,_fea ,_gg byte ;_da ,_ecd ,_bfg int ;_ddd ,_fg []byte ;);for _fed :=0;_fed < bm .Height ;_fed ++{_dc ,_fea =0,0;if _fed >=2{_dc =bm .Data [(_fed -2)*bm .RowStride ];};if _fed >=1{_fea =bm .Data [(_fed -1)*bm .RowStride ];
if duplicateLineRemoval {_ecd =_fed *bm .RowStride ;_ddd =bm .Data [_ecd :_ecd +bm .RowStride ];_bfg =(_fed -1)*bm .RowStride ;_fg =bm .Data [_bfg :_bfg +bm .RowStride ];if _f .Equal (_ddd ,_fg ){_abb =_gcd ^1;_gcd =1;}else {_abb =_gcd ;_gcd =0;};};};if duplicateLineRemoval {if _fda :=_agd .encodeBit (_agd ._cd ,_ebb ,_abb );
_fda !=nil {return _fda ;};if _gcd !=0{continue ;};};_gg =bm .Data [_fed *bm .RowStride ];_gcc =uint16 (_dc >>5);_dd =uint16 (_fea >>4);_dc <<=3;_fea <<=4;_bf =0;for _da =0;_da < bm .Width ;_da ++{_eg :=uint32 (_gcc <<11|_dd <<4|_bf );_acg :=(_gg &0x80)>>7;
_ee :=_agd .encodeBit (_agd ._cd ,_eg ,_acg );if _ee !=nil {return _ee ;};_gcc <<=1;_dd <<=1;_bf <<=1;_gcc |=uint16 ((_dc &0x80)>>7);_dd |=uint16 ((_fea &0x80)>>7);_bf |=uint16 (_acg );_gcdd :=_da %8;_bcb :=_da /8+1;if _gcdd ==4&&_fed >=2{_dc =0;if _bcb < bm .RowStride {_dc =bm .Data [(_fed -2)*bm .RowStride +_bcb ];
};}else {_dc <<=1;};if _gcdd ==3&&_fed >=1{_fea =0;if _bcb < bm .RowStride {_fea =bm .Data [(_fed -1)*bm .RowStride +_bcb ];};}else {_fea <<=1;};if _gcdd ==7{_gg =0;if _bcb < bm .RowStride {_gg =bm .Data [_fed *bm .RowStride +_bcb ];};}else {_gg <<=1;};
_gcc &=31;_dd &=127;_bf &=15;};};return nil ;};func (_cgb *Encoder )codeLPS (_cgbg *codingContext ,_gce uint32 ,_fddg uint16 ,_acgc byte ){_cgb ._gd -=_fddg ;if _cgb ._gd < _fddg {_cgb ._bg +=uint32 (_fddg );}else {_cgb ._gd =_fddg ;};if _ffdd [_acgc ]._ead ==1{_cgbg .flipMps (_gce );
};_cgbg ._d [_gce ]=_ffdd [_acgc ]._acc ;_cgb .renormalize ();};func (_fga *Encoder )Refine (iTemp ,iTarget *_ba .Bitmap ,ox ,oy int )error {for _gf :=0;_gf < iTarget .Height ;_gf ++{var _bge int ;_bgb :=_gf +oy ;var (_gfe ,_fbb ,_aeb ,_cbg ,_df uint16 ;
_dg ,_age ,_dbf ,_abbc ,_gb byte ;);if _bgb >=1&&(_bgb -1)< iTemp .Height {_dg =iTemp .Data [(_bgb -1)*iTemp .RowStride ];};if _bgb >=0&&_bgb < iTemp .Height {_age =iTemp .Data [_bgb *iTemp .RowStride ];};if _bgb >=-1&&_bgb +1< iTemp .Height {_dbf =iTemp .Data [(_bgb +1)*iTemp .RowStride ];
};if _gf >=1{_abbc =iTarget .Data [(_gf -1)*iTarget .RowStride ];};_gb =iTarget .Data [_gf *iTarget .RowStride ];_cgc :=uint (6+ox );_gfe =uint16 (_dg >>_cgc );_fbb =uint16 (_age >>_cgc );_aeb =uint16 (_dbf >>_cgc );_cbg =uint16 (_abbc >>6);_ccf :=uint (2-ox );
_dg <<=_ccf ;_age <<=_ccf ;_dbf <<=_ccf ;_abbc <<=2;for _bge =0;_bge < iTarget .Width ;_bge ++{_dcd :=(_gfe <<10)|(_fbb <<7)|(_aeb <<4)|(_cbg <<1)|_df ;_gba :=_gb >>7;_ad :=_fga .encodeBit (_fga ._cd ,uint32 (_dcd ),_gba );if _ad !=nil {return _ad ;};_gfe <<=1;
_fbb <<=1;_aeb <<=1;_cbg <<=1;_gfe |=uint16 (_dg >>7);_fbb |=uint16 (_age >>7);_aeb |=uint16 (_dbf >>7);_cbg |=uint16 (_abbc >>7);_df =uint16 (_gba );_edf :=_bge %8;_fgd :=_bge /8+1;if _edf ==5+ox {_dg ,_age ,_dbf =0,0,0;if _fgd < iTemp .RowStride &&_bgb >=1&&(_bgb -1)< iTemp .Height {_dg =iTemp .Data [(_bgb -1)*iTemp .RowStride +_fgd ];
};if _fgd < iTemp .RowStride &&_bgb >=0&&_bgb < iTemp .Height {_age =iTemp .Data [_bgb *iTemp .RowStride +_fgd ];};if _fgd < iTemp .RowStride &&_bgb >=-1&&(_bgb +1)< iTemp .Height {_dbf =iTemp .Data [(_bgb +1)*iTemp .RowStride +_fgd ];};}else {_dg <<=1;
_age <<=1;_dbf <<=1;};if _edf ==5&&_gf >=1{_abbc =0;if _fgd < iTarget .RowStride {_abbc =iTarget .Data [(_gf -1)*iTarget .RowStride +_fgd ];};}else {_abbc <<=1;};if _edf ==7{_gb =0;if _fgd < iTarget .RowStride {_gb =iTarget .Data [_gf *iTarget .RowStride +_fgd ];
};}else {_gb <<=1;};_gfe &=7;_fbb &=7;_aeb &=7;_cbg &=7;};};return nil ;};func _ec (_fec int )*codingContext {return &codingContext {_d :make ([]byte ,_fec ),_ca :make ([]byte ,_fec )};};func (_gec *Encoder )byteOut (){if _gec ._eb ==0xff{_gec .rBlock ();
return ;};if _gec ._bg < 0x8000000{_gec .lBlock ();return ;};_gec ._eb ++;if _gec ._eb !=0xff{_gec .lBlock ();return ;};_gec ._bg &=0x7ffffff;_gec .rBlock ();};var _ffdd =[]state {{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}};
func (_dba *Encoder )dataSize ()int {return _adae *len (_dba ._bd )+_dba ._cf };func (_db *Encoder )DataSize ()int {return _db .dataSize ()};func (_adf *Encoder )encodeIAID (_gdde ,_eca int )error {if _adf ._fdd ==nil {_adf ._fdd =_ec (1<<uint (_gdde ));
};_fcf :=uint32 (1<<uint32 (_gdde +1))-1;_eca <<=uint (32-_gdde );_ceg :=uint32 (1);for _fbf :=0;_fbf < _gdde ;_fbf ++{_bbc :=_ceg &_fcf ;_agb :=uint8 ((uint32 (_eca )&0x80000000)>>31);if _bbb :=_adf .encodeBit (_adf ._fdd ,_bbc ,_agb );_bbb !=nil {return _bbb ;
};_ceg =(_ceg <<1)|uint32 (_agb );_eca <<=1;};return nil ;};func (_cg *Encoder )Final (){_cg .flush ()};type Class int ;func (_ebf *Encoder )encodeOOB (_ada Class )error {_ccg :=_ebf ._cfa [_ada ];_edg :=_ebf .encodeBit (_ccg ,1,1);if _edg !=nil {return _edg ;
};_edg =_ebf .encodeBit (_ccg ,3,0);if _edg !=nil {return _edg ;};_edg =_ebf .encodeBit (_ccg ,6,0);if _edg !=nil {return _edg ;};_edg =_ebf .encodeBit (_ccg ,12,0);if _edg !=nil {return _edg ;};return nil ;};func (_edb *Encoder )code1 (_bbf *codingContext ,_ea uint32 ,_aa uint16 ,_bfgb byte ){if _bbf .mps (_ea )==1{_edb .codeMPS (_bbf ,_ea ,_aa ,_bfgb );
}else {_edb .codeLPS (_bbf ,_ea ,_aa ,_bfgb );};};func (_gc *codingContext )flipMps (_ae uint32 ){_gc ._ca [_ae ]=1-_gc ._ca [_ae ]};func (_bb *Encoder )WriteTo (w _fa .Writer )(int64 ,error ){const _cga ="\u0045n\u0063o\u0064\u0065\u0072\u002e\u0057\u0072\u0069\u0074\u0065\u0054\u006f";
var _fagf int64 ;for _dbg ,_dcc :=range _bb ._bd {_af ,_aebd :=w .Write (_dcc );if _aebd !=nil {return 0,_fe .Wrapf (_aebd ,_cga ,"\u0066\u0061\u0069\u006c\u0065\u0064\u0020\u0061\u0074\u0020\u0069'\u0074\u0068\u003a\u0020\u0027\u0025\u0064\u0027\u0020\u0063h\u0075\u006e\u006b",_dbg );
};_fagf +=int64 (_af );};_bb ._fag =_bb ._fag [:_bb ._cf ];_bag ,_egd :=w .Write (_bb ._fag );if _egd !=nil {return 0,_fe .Wrap (_egd ,_cga ,"\u0062u\u0066f\u0065\u0072\u0065\u0064\u0020\u0063\u0068\u0075\u006e\u006b\u0073");};_fagf +=int64 (_bag );return _fagf ,nil ;
};func (_cfaf *Encoder )flush (){_cfaf .setBits ();_cfaf ._bg <<=_cfaf ._ed ;_cfaf .byteOut ();_cfaf ._bg <<=_cfaf ._ed ;_cfaf .byteOut ();_cfaf .emit ();if _cfaf ._eb !=0xff{_cfaf ._cb ++;_cfaf ._eb =0xff;_cfaf .emit ();};_cfaf ._cb ++;_cfaf ._eb =0xac;
_cfaf ._cb ++;_cfaf .emit ();};func (_e Class )String ()string {switch _e {case IAAI :return "\u0049\u0041\u0041\u0049";case IADH :return "\u0049\u0041\u0044\u0048";case IADS :return "\u0049\u0041\u0044\u0053";case IADT :return "\u0049\u0041\u0044\u0054";
case IADW :return "\u0049\u0041\u0044\u0057";case IAEX :return "\u0049\u0041\u0045\u0058";case IAFS :return "\u0049\u0041\u0046\u0053";case IAIT :return "\u0049\u0041\u0049\u0054";case IARDH :return "\u0049\u0041\u0052D\u0048";case IARDW :return "\u0049\u0041\u0052D\u0057";
case IARDX :return "\u0049\u0041\u0052D\u0058";case IARDY :return "\u0049\u0041\u0052D\u0059";case IARI :return "\u0049\u0041\u0052\u0049";default:return "\u0055N\u004b\u004e\u004f\u0057\u004e";};};type state struct{_dgd uint16 ;_dcee ,_acc uint8 ;_ead uint8 ;
};func (_gdd *Encoder )code0 (_ddbf *codingContext ,_ddc uint32 ,_ga uint16 ,_faga byte ){if _ddbf .mps (_ddc )==0{_gdd .codeMPS (_ddbf ,_ddc ,_ga ,_faga );}else {_gdd .codeLPS (_ddbf ,_ddc ,_ga ,_faga );};};func (_g *codingContext )mps (_caa uint32 )int {return int (_g ._ca [_caa ])};
const (IAAI Class =iota ;IADH ;IADS ;IADT ;IADW ;IAEX ;IAFS ;IAIT ;IARDH ;IARDW ;IARDX ;IARDY ;IARI ;);func New ()*Encoder {_ge :=&Encoder {};_ge .Init ();return _ge };func (_fbe *Encoder )codeMPS (_eec *codingContext ,_fgf uint32 ,_agdg uint16 ,_be byte ){_fbe ._gd -=_agdg ;
if _fbe ._gd &0x8000!=0{_fbe ._bg +=uint32 (_agdg );return ;};if _fbe ._gd < _agdg {_fbe ._gd =_agdg ;}else {_fbe ._bg +=uint32 (_agdg );};_eec ._d [_fgf ]=_ffdd [_be ]._dcee ;_fbe .renormalize ();};func (_dce *Encoder )encodeBit (_gbe *codingContext ,_abd uint32 ,_bdc uint8 )error {const _fae ="\u0045\u006e\u0063\u006f\u0064\u0065\u0072\u002e\u0065\u006e\u0063\u006fd\u0065\u0042\u0069\u0074";
_dce ._fc ++;if _abd >=uint32 (len (_gbe ._d )){return _fe .Errorf (_fae ,"\u0061r\u0069\u0074h\u006d\u0065\u0074i\u0063\u0020\u0065\u006e\u0063\u006f\u0064e\u0072\u0020\u002d\u0020\u0069\u006ev\u0061\u006c\u0069\u0064\u0020\u0063\u0074\u0078\u0020\u006e\u0075m\u0062\u0065\u0072\u003a\u0020\u0027\u0025\u0064\u0027",_abd );
};_gfeb :=_gbe ._d [_abd ];_ffb :=_gbe .mps (_abd );_gbg :=_ffdd [_gfeb ]._dgd ;_bc .Log .Trace ("\u0045\u0043\u003a\u0020\u0025d\u0009\u0020D\u003a\u0020\u0025d\u0009\u0020\u0049\u003a\u0020\u0025d\u0009\u0020\u004dPS\u003a \u0025\u0064\u0009\u0020\u0051\u0045\u003a \u0025\u0030\u0034\u0058\u0009\u0020\u0020\u0041\u003a\u0020\u0025\u0030\u0034\u0058\u0009\u0020\u0043\u003a %\u0030\u0038\u0058\u0009\u0020\u0043\u0054\u003a\u0020\u0025\u0064\u0009\u0020\u0042\u003a\u0020\u0025\u0030\u0032\u0058\u0009\u0020\u0042\u0050\u003a\u0020\u0025\u0064",_dce ._fc ,_bdc ,_gfeb ,_ffb ,_gbg ,_dce ._gd ,_dce ._bg ,_dce ._ed ,_dce ._eb ,_dce ._cb );
if _bdc ==0{_dce .code0 (_gbe ,_abd ,_gbg ,_gfeb );}else {_dce .code1 (_gbe ,_abd ,_gbg ,_gfeb );};return nil ;};func (_cac *Encoder )emit (){if _cac ._cf ==_adae {_cac ._bd =append (_cac ._bd ,_cac ._fag );_cac ._fag =make ([]byte ,_adae );_cac ._cf =0;
};_cac ._fag [_cac ._cf ]=_cac ._eb ;_cac ._cf ++;};const (_gae =65536;_adae =20*1024;);func (_ddb *Encoder )Flush (){_ddb ._cf =0;_ddb ._bd =nil ;_ddb ._cb =-1};