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Parameters for construction: error_func: Called with (msg, line, column) on lexing errors. on_lbrace_func: Called when an LBRACE token is produced (used for scope tracking). on_rbrace_func: Called when an RBRACE token is produced (used for scope tracking). type_lookup_func: Called with an identifier name; expected to return True if it is a typedef name and should be tokenized as TYPEID. Call input(text) to initialize lexing, and then keep calling token() to get the next token, until it returns None (at end of input). � error_funcN�on_lbrace_func�on_rbrace_func�type_lookup_func�returnc C s$ || _ || _|| _|| _| �� d S �N)r r r r � _init_state)�selfr r r r r r r �__init__) s zCLexer.__init__� �text�filenamec C s | � � || _|| _dS )z�Initialize the lexer to the given input text. filename is an optional name identifying the file from which the input comes. The lexer can modify it if #line directives are encountered. N)r �_lexdata� _filename)r r" r# r r r �input6 s z CLexer.inputc C s( d| _ d| _d| _d| _d | _d| _d S )Nr! r � )r$ r% �_pos� _line_start� _pending_tok�_lineno�r r r r r @ s zCLexer._init_statec C s | j S r )r% r, r r r r# H s zCLexer.filenamec C sd | j }t|�}| jd ur| j}d | _|S | j|k r�|| j dkr#n dkr(n n | jd7 _nu dkrL | jd7 _| jd7 _| j| _n]dkr�t�|| jd �rd| jd7 _| �� qt �|| jd �r�| jd7 _| � � }t|�dkr�|d | _t|�dkr�|d S q| � dd| j�}| jd7 _|S | � � }r�|S q| j|k sd S d S )N� � r' � �#r ZPPHASH) r$ �lenr* r( r+ r) � _line_pattern�match�_handle_ppline�_pragma_pattern�_handle_pppragma� _make_token� _match_token)r r" �n�tok�toksr r r �tokenL sF �z CLexer.tokenc C s� | j }| j}d}t�||� }r/|j}|dusJ �|�|�}t|�}t| \}} ||||| f}t� || � } r_| D ]$} |� | j |�r^t| j �}|du sR||d kr\|| j | j t jdf} nq:|du r{dt|| �� �} | �| |� | jd7 _dS |\}}}}} |t jkr�|dkr�d|� �} | dus�J �| �| |� | jtd|�7 _dS |t jkr�t� |d�}|dkr�| �|�r�d}| �|||�} | j|7 _| jd kr�| �� | S | jd kr�| �� | S ) z�Match one token at the current position. Returns a Token on success, or None if no token could be matched and an error was reported. This method always advances _pos by the matched length, or by 1 on error/no-match. Nr zIllegal character r' �BAD_CHAR_CONSTzInvalid char constant �IDZTYPEID�LBRACE�RBRACE)r$ r( � _regex_masterr3 � lastgroup�groupr1 �_regex_actions�_fixed_tokens_by_first�get� startswith�literal�tok_type� _RegexAction�TOKEN�repr�_error�ERROR�maxr> � _keyword_mapr r7 r r r ) r r" �posZbest�mrI r �length�action�msgZbucket�entryr: r r r r8 � s` �� �zCLexer._match_tokenrI r rQ c C s" || j d }t||| j|�}|S )a# Create a Token at an absolute input position. Expects tok_type/value and the absolute byte offset pos in the current input. Does not advance lexer state; callers manage _pos themselves. Returns a Token with lineno/column computed from current line tracking. r' )r) r r+ )r rI r rQ r r: r r r r7 � s zCLexer._make_tokenrU c C s" || j d }| �|| j|� d S �Nr' )r) r r+ )r rU rQ r r r r rM � s z CLexer._errorc s �j }t|�}|�d�j���dkr|�|�j�� � d�t� ��d� ��fdd� }|� � �d��r7�d7 �d tt d tt dd f���fd d � }d tdtdd f��fdd� }|� ��krf|d d � d S � � dkrs|d�� d S t� t � �d � �}|s�|d�� d S |� d�}�t|�7 �|� ��kr�||d � d S � � dkr�|d�� d S t� t � �d � �}|s�|d�� d S |� d�� d��d�}�t|� d��7 � |� ��kr�n t� t � �d � �}|s�|d�� d S �t|� d��7 �q�|||� d S )Nr/ ���r r c s@ ��k r� � dv r �d7 ���k r � � dv s d S d S d S d S )N� r' r r )�line�line_lenrQ r r �skip_ws s $�z&CLexer._handle_ppline.<locals>.skip_wsrZ � �pp_line� pp_filenamec sJ | d u r�� d�j� � n t| ��_|d ur|�_� d �_�j�_d S )Nz line number missing in #liner' )rM r( r r+ r% r) )r^ r_ )�line_endr[ r r r �success s z&CLexer._handle_ppline.<locals>.successrU �offsetc s( �� | �j| � � d �_�j�_d S rW )rM r( r) )rU rb )r` r r r �fail s z#CLexer._handle_ppline.<locals>.fail�"z$filename before line number in #linezinvalid #line directiveT�r N)r$ r1 �findr( rG r r r �rer3 �_decimal_constantrC �_string_literal�lstrip�rstrip) r r" r9 r\ ra rc rR r^ r_ r )rZ r` r[ rQ r r r4 � sf & � zCLexer._handle_pplinec C s^ | j }t|�}| j}||k r"|| dv r"|d7 }||k r"|| dv s||kr+|| _g S |�d|�s>| �d|� |d | _g S |}|td�7 }| �dd|�g}||k rf|| dv rf|d7 }||k rf|| dv sX|}||k r�|| dkr�|d7 }||k r�|| dksr||kr�|�| �d|||� |�� ||k r�|| dkr�| jd7 _|d7 }|| _|| _|S )NrY r' Zpragmazinvalid #pragma directiveZPPPRAGMAr/ Z PPPRAGMASTR) r$ r1 r( rG rM r7 �appendr+ r) )r r" r9 rQ Z pragma_posr; �startr r r r6 K s> � �� zCLexer._handle_pppragma)r! re )r r r �__doc__r r r �boolr r& r �propertyr# r r r< r8 r7 rM r4 r r6 r r r r r s. � � � � � AM br )-ZAUTOZBREAKZCASEZCHARZCONST�CONTINUEZDEFAULTZDOZDOUBLE�ELSEZENUMZEXTERNZFLOATZFORZGOTOZIFZINLINEZINTZLONGZREGISTERZOFFSETOFZRESTRICTZRETURNZSHORTZSIGNEDZSIZEOFZSTATICZSTRUCTZSWITCHZTYPEDEFZUNIONZUNSIGNEDZVOIDZVOLATILEZWHILEZ__INT128Z_BOOLZ_COMPLEXZ _NORETURNZ _THREAD_LOCALZ_STATIC_ASSERTZ_ATOMICZ_ALIGNOFZ_ALIGNASZ_PRAGMA.� _keywordsrP �_r' � z[a-zA-Z_$][0-9a-zA-Z_$]*z0[xX]z [0-9a-fA-F]+z0[bB]z[01]+zD(([uU]ll)|([uU]LL)|(ll[uU]?)|(LL[uU]?)|([uU][lL])|([lL][uU]?)|[uU])?z(0z)|([1-9][0-9]*�)z0[0-7]*z 0[0-7]*[89]z\/\*z\/\/z,([a-wyzA-Z._~!=&\^\-\\?'"]|x(?![0-9a-fA-F]))z (\d+)(?!\d)z (x[0-9a-fA-F]+)(?![0-9a-fA-F])z#([\\][^a-zA-Z._~^!=&\^\-\\?'"x0-9])z(\\(�|z))z (\\[0-9a-zA-Z._~!=&\^\-\\?'"])z ([^'\\\n]|�'�L�u8�u�Uz{2,4}'z('z*\n)|('z*$)z[^' ]+')|('')|('z [^'\n]*')z ([^"\\\n]|rd z*"�*z([eE][-+]?[0-9]+)z([0-9]*\.[0-9]+)|([0-9]+\.)z((((z ?)|([0-9]+z ))[FfLl]?)z([pP][+-]?[0-9]+)z(((z)?\.z)|(z\.))�(z[FfLl]?)c @ s e Zd ZdZdZdZdS )rJ r r' ru N)r r r rK r> rN r r r r rJ 2 s rJ )�frozenc @ s2 e Zd ZU eed< eed< eed< ee ed< dS )� _RegexRulerI � regex_patternrT � error_messageN)r r r r r rJ r r r r r r� 8 s r� ZUNSUPPORTED_C_STYLE_COMMENTzKComments are not supported, see https://github.com/eliben/pycparser#3using.Z UNSUPPORTED_CXX_STYLE_COMMENTZBAD_STRING_LITERALz#String contains invalid escape codeZWSTRING_LITERALZU8STRING_LITERALZU16STRING_LITERALZU32STRING_LITERALZSTRING_LITERALZHEX_FLOAT_CONSTZ FLOAT_CONSTZ INT_CONST_HEXZ INT_CONST_BINZ BAD_CONST_OCTzInvalid octal constantZ INT_CONST_OCTZ INT_CONST_DECZINT_CONST_CHARZ CHAR_CONSTZ WCHAR_CONSTZ U8CHAR_CONSTZ U16CHAR_CONSTZ U32CHAR_CONSTZUNMATCHED_QUOTEz Unmatched 'r= r> � _regex_rulesrD �_regex_pattern_partsz(?P<�>rA c @ s e Zd ZU eed< eed< dS )� _FixedTokenrI rH N)r r r r r r r r r r� s r� �ELLIPSISz...Z LSHIFTEQUALz<<=Z RSHIFTEQUALz>>=ZPLUSPLUSz++Z MINUSMINUSz--ZARROWz->ZLANDz&&ZLORz||ZLSHIFTz<<ZRSHIFTz>>ZLEz<=ZGEz>=ZEQz==ZNEz!=Z TIMESEQUALz*=ZDIVEQUALz/=ZMODEQUALz%=� PLUSEQUALz+=Z MINUSEQUALz-=ZANDEQUALz&=ZOREQUALz|=ZXOREQUALz^=ZEQUALS�=�PLUS�+�MINUS�-ZTIMESZDIVIDE�/ZMOD�%�ORZAND�&ZNOT�~ZXOR�^ZLNOT�!ZLT�<ZGTZCONDOP�?ZLPARENZRPARENZLBRACKET�[ZRBRACKET�]r? 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