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편집 파일: utf1632prober.cpython-38.pyc
U ʗRea � @ s, d dl mZ d dlmZ G dd� de�ZdS )� )� CharSetProber)� ProbingStatec s� e Zd ZdZdZdZ� fdd�Z� fdd�Zedd � �Z ed d � �Z d d � Z dd� Z dd� Z dd� Zdd� Zdd� Zdd� Zdd� Zd d � Zed d � �Zd d!� Z� ZS )"� 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. � g�G�z�?c sn t � �� d| _dgd | _dgd | _tj| _ddddg| _d| _ d| _ d| _ d| _ d| _ d| _| �� d S �N� � F)�super�__init__�position� zeros_at_mod�nonzeros_at_modr � DETECTING�_state�quad�invalid_utf16be�invalid_utf16le�invalid_utf32be�invalid_utf32le�'first_half_surrogate_pair_detected_16be�'first_half_surrogate_pair_detected_16le�reset��self�� __class__� ��/builddir/build/BUILDROOT/alt-python38-pip-22.2.1-2.el8.x86_64/opt/alt/python38/lib/python3.8/site-packages/pip/_vendor/chardet/utf1632prober.pyr ' s zUTF1632Prober.__init__c sf t � �� d| _dgd | _dgd | _tj| _d| _d| _ d| _ d| _ d| _ d| _ ddddg| _d S r )r r r r r r r r r r r r r r r r r r r r 6 s zUTF1632Prober.resetc C s4 | � � r dS | �� rdS | �� r$dS | �� r0dS dS )Nzutf-32bezutf-32lezutf-16bezutf-16lezutf-16)�is_likely_utf32be�is_likely_utf32le�is_likely_utf16be�is_likely_utf16ler r r r � charset_nameD s zUTF1632Prober.charset_namec C s dS )N� r r r r r �languageQ s zUTF1632Prober.languagec C s t d| jd �S )N� �?g @��maxr r r r r �approx_32bit_charsU s z UTF1632Prober.approx_32bit_charsc C s t d| jd �S )Nr% g @r& r r r r �approx_16bit_charsX s z UTF1632Prober.approx_16bit_charsc C sj | � � }|| jkoh| jd | | jkoh| jd | | jkoh| jd | | jkoh| jd | | jkoh| j S �Nr r � � )r( �MIN_CHARS_FOR_DETECTIONr �EXPECTED_RATIOr r �r � approx_charsr r r r [ s ����z UTF1632Prober.is_likely_utf32bec C sj | � � }|| jkoh| jd | | jkoh| jd | | jkoh| jd | | jkoh| jd | | jkoh| j S r* )r( r- r r. r r r/ r r r r e s ����z UTF1632Prober.is_likely_utf32lec C sV | � � }|| jkoT| jd | jd | | jkoT| jd | jd | | jkoT| j S )Nr r, r r+ )r) r- r r. r r r/ r r r r o s ����z UTF1632Prober.is_likely_utf16bec C sV | � � }|| jkoT| jd | jd | | jkoT| jd | jd | | jkoT| j S )Nr r+ r r, )r) r- r r. r r r/ r r r r! y s ����z UTF1632Prober.is_likely_utf16lec C s� |d dksL|d dksL|d dkrR|d dkrRd|d krHdkrRn nd| _ |d dks�|d dks�|d dkr�|d dkr�d|d kr�dkr�n nd| _d S ) 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 � �� r+ �� Tr, N)r r )r r r r r �validate_utf32_characters� s8 � � � � �� � � � � �� z'UTF1632Prober.validate_utf32_charactersc C s� | j sNd|d kr dkr*n nd| _ qxd|d krBdkrxn qxd| _n*d|d krfdkrrn nd| _ nd| _| js�d|d kr�dkr�n nd| _q�d|d kr�dkr�n q�d| _n*d|d kr�dkr�n nd| _nd| _d S ) 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 r2 r �� T�� r3 Fr N)r r r r )r �pairr r r �validate_utf16_characters� s z'UTF1632Prober.validate_utf16_charactersc C s� |D ]�}| j d }|| j|< |dkrX| �| j� | �| jdd� � | �| jdd� � |dkrt| j| d7 < n| j| d7 < | j d7 _ q| jS )Nr r, r r+ r )r r r4 r8 r r �state)r �byte_str�c�mod4r r r �feed� s zUTF1632Prober.feedc C sF | j tjtjhkr| j S | �� dkr.tj| _ n| jdkr@tj| _ | j S )Ng�������?i )r r �NOT_ME�FOUND_IT�get_confidencer r r r r r9 � s zUTF1632Prober.statec C s( | � � s | �� s | �� s | �� r$dS dS )Ng333333�?g )r! r r r r r r r r@ � s �����z UTF1632Prober.get_confidence)�__name__� __module__� __qualname__�__doc__r- r. r r �propertyr" r$ r( r) r r r r! r4 r8 r= r9 r@ � __classcell__r r r r r s* r N)� charsetproberr �enumsr r r r r r �<module> s