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utf1632prober.cpython-312.pyc
d9! B d dl mZmZ ddlmZ ddlmZ G d de Zy) )ListUnion ) CharSetProber) ProbingStatec e Zd ZdZdZdZd fd Zd fd Zede fd Z ede fd Z de fd Z de fd Zdefd Zdefd ZdefdZdefdZdee ddfdZdee ddfdZdeeef defdZ edefd Z de fdZ xZ S ) UTF1632Proberad This class simply looks for occurrences of zero bytes, and infers whether the file is UTF16 or UTF32 (low-endian or big-endian) For instance, files looking like ( [nonzero] )+ have a good probability to be UTF32BE. Files looking like ( [nonzero] )+ may be guessed to be UTF16BE, and inversely for little-endian varieties. gGz?returnNc t | d| _ dgdz | _ dgdz | _ t j | _ g d| _ d| _ d| _ d| _ d| _ d| _ d| _ | j y )Nr r r r r F)super__init__position zeros_at_modnonzeros_at_modr DETECTING_statequadinvalid_utf16beinvalid_utf16leinvalid_utf32beinvalid_utf32le'first_half_surrogate_pair_detected_16be'first_half_surrogate_pair_detected_16leresetself __class__s 7/usr/lib/python3/dist-packages/chardet/utf1632prober.pyr zUTF1632Prober.__init__) s~ C!G !sQw ",, $ $ $ $ 7<47<4 c t | d| _ dgdz | _ dgdz | _ t j | _ d| _ d| _ d| _ d| _ d| _ d| _ g d| _ y )Nr r Fr )r r r r r r r r r r r r r r r r s r! r zUTF1632Prober.reset8 ss C!G !sQw ",, $ $ $ $ 7<47<4 r" c | j ry| j ry| j ry| j ryy)Nzutf-32bezutf-32lezutf-16bezutf-16lezutf-16)is_likely_utf32beis_likely_utf32leis_likely_utf16beis_likely_utf16ler s r! charset_namezUTF1632Prober.charset_nameF sA ! ! # ! ! # ! ! # ! ! # r" c y)N r) s r! languagezUTF1632Prober.languageS s r" c 4 t d| j dz S )N ?g @maxr r) s r! approx_32bit_charsz UTF1632Prober.approx_32bit_charsW 3 +,,r" c 4 t d| j dz S )Nr0 g @r1 r) s r! approx_16bit_charsz UTF1632Prober.approx_16bit_charsZ r4 r" c f | j }|| j k\ xr | j d |z | j kD xrp | j d |z | j kD xrO | j d |z | j kD xr. | j d |z | j kD xr | j S Nr r )r3 MIN_CHARS_FOR_DETECTIONr EXPECTED_RATIOr r r approx_charss r! r% z UTF1632Prober.is_likely_utf32be] s ..0 t ; ;; a < /$2E2E E )!!!$|3d6I6II )!!!$|3d6I6II ) $$Q',69L9LL ) ((( r" c f | j }|| j k\ xr | j d |z | j kD xrp | j d |z | j kD xrO | j d |z | j kD xr. | j d |z | j kD xr | j S r8 )r3 r; r r< r r r= s r! r& z UTF1632Prober.is_likely_utf32leg s ..0 t ; ;; #l 2T5H5H H )!!!$|3d6I6II )!!!$|3d6I6II ) !!!$|3d6I6II ) ((( r" c " | j }|| j k\ xro | j d | j d z |z | j kD xr> | j d | j d z |z | j kD xr | j S )Nr r: r r9 )r6 r; r r< r r r= s r! r' z UTF1632Prober.is_likely_utf16beq ..0 t ; ;; ! !! $t';';A'> >, N!! " )""1%(9(9!(<< L!!" ) ((( r" c " | j }|| j k\ xro | j d | j d z |z | j kD xr> | j d | j d z |z | j kD xr | j S )Nr r9 r r: )r6 r; r r< r r r= s r! r( z UTF1632Prober.is_likely_utf16le{ rA r" r c |d dk7 s)|d dkD s!|d dk( r |d dk( rd|d cxk rdk r n nd| _ |d dk7 s)|d dkD s!|d dk( r#|d dk( rd|d cxk rdk r n y d| _ y y y y ) z Validate if the quad of bytes is valid UTF-32. UTF-32 is valid in the range 0x00000000 - 0x0010FFFF excluding 0x0000D800 - 0x0000DFFF https://en.wikipedia.org/wiki/UTF-32 r r r9 Tr: N)r r )r r s r! validate_utf32_charactersz'UTF1632Prober.validate_utf32_characters s GqLAw~Q1 aA $$q'2IT2I#'D GqLAw~Q1 aA $$q'2IT2I#'D 3J r" pairc z | j s2d|d cxk rdk r n nd| _ n9d|d cxk rdk r+n n(d| _ n d|d cxk rdk r n nd| _ nd| _ | j s3d|d cxk rdk r n nd| _ y d|d cxk rdk r n y d| _ y y d|d cxk r dk r d| _ y d| _ y ) a9 Validate if the pair of bytes is valid UTF-16. UTF-16 is valid in the range 0x0000 - 0xFFFF excluding 0xD800 - 0xFFFF with an exception for surrogate pairs, which must be in the range 0xD800-0xDBFF followed by 0xDC00-0xDFFF https://en.wikipedia.org/wiki/UTF-16 rE r T rF Fr N)r r r r )r rH s r! validate_utf16_charactersz'UTF1632Prober.validate_utf16_characters s ;;tAw&$&?C<a(D('+$tAw&$&?D<'+$;;tAw&$&?C<a(D('+$ ) tAw&$&?D< ' (,$r" byte_strc |D ] }| j dz }|| j |< |dk( rW| j | j | j | j dd | j | j dd |dk( r| j |xx dz cc< n| j |xx dz cc< | xj dz c_ | j S )Nr r: r r9 r )r r rG rL r r state)r rM cmod4s r! feedzUTF1632Prober.feed s A==1$D DIIdOqy..tyy9..tyy1~>..tyy1~>Av!!$'1,'$$T*a/* MMQ M zzr" c : | j t j t j hv r | j S | j dkD r!t j | _ | j S | j dkD rt j | _ | j S )Ng?i )r r NOT_MEFOUND_ITget_confidencer r) s r! rO zUTF1632Prober.state sz ;;<.. 0E0EF F;; 4 '&//DK {{ ]]X % '--DK{{r" c | j s0| j s | j s| j rdS dS )Ng333333?g )r( r' r& r% r) s r! rV z UTF1632Prober.get_confidence sH &&())+))+))+ r" )r N) __name__ __module__ __qualname____doc__r; r< r r propertystrr* r. floatr3 r6 boolr% r& r' r( r intrG rL r bytes bytearrayr rR rO rV __classcell__)r s @r! r r s !N ! c # -E --E - 4 4 4 4 (d3i (D (, ,d3i ,D ,@ U5)#3 4 | r" r N)typingr r charsetproberr enumsr r r- r" r! <module>rg s * ( F M F r"