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o �hwJ � @ sL d dl mZ d dlmZmZmZmZmZ d dlm Z m Z G dd� de �Z dS )� )�BytesIO)�linefeed_byte_value�crlf�cr_byte� linefeed_byte� cr_byte_value)�ClosingContextManager�uc @ s e Zd ZdZdZdZdZdZdZdZ dZ dZ dZ d Z d Zd d � Zd d� Zdd� Zdd� Zdd� Zdd� Zdd� Zdd� Zdd � Zd d � Zd@d d!�Zd@d"d#�Zd@d$d%�ZdAd&d'�Z d(d)� Z d*d+� Z d,d-� Z d.d/� Z e!d0d1� �Z"d2d3� Z#d4d5� Z$d6d7� Z%dBd:d;�Z&d<d=� Z'd>d?� Z(d S )C� BufferedFilezc Reusable base class to implement Python-style file buffering around a simpler stream. i r � � � � � �@ � c C sF d | _ d| _| j| _t� | _t� | _d| _d| _ d | _ | _ d| _ d S )Nr F) �newlines�_flags�_DEFAULT_BUFSIZE�_bufsizer �_wbuffer�bytes�_rbuffer�_at_trailing_cr�_closed�_pos�_realpos�_size��self� r �C/usr/local/CyberPanel/lib/python3.10/site-packages/paramiko/file.py�__init__3 s zBufferedFile.__init__c C s | � � d S �N)�closer r r r! �__del__B s zBufferedFile.__del__c C s | j rtd��| S )z� Returns an iterator that can be used to iterate over the lines in this file. This iterator happens to return the file itself, since a file is its own iterator. :raises: ``ValueError`` -- if the file is closed. z I/O operation on closed file)r � ValueErrorr r r r! �__iter__E s zBufferedFile.__iter__c C s | � � d| _dS )zN Close the file. Future read and write operations will fail. TN)�flushr r r r r! r$ Q s zBufferedFile.closec C s | � | j�� � t� | _dS )z{ Write out any data in the write buffer. This may do nothing if write buffering is not turned on. N)� _write_allr �getvaluer r r r r! r( X s zBufferedFile.flushc C s | � � }|st�|S )a� Returns the next line from the input, or raises ``StopIteration`` when EOF is hit. Unlike python file objects, it's okay to mix calls to `.next` and `.readline`. :raises: ``StopIteration`` -- when the end of the file is reached. :returns: a line (`str`, or `bytes` if the file was opened in binary mode) read from the file. )�readline� StopIteration)r �liner r r! �__next__a s zBufferedFile.__next__c C � | j | j@ | jkS )z� Check if the file can be read from. :returns: `True` if the file can be read from. If `False`, `read` will raise an exception. )r � FLAG_READr r r r! �readabler � zBufferedFile.readablec C r/ )z� Check if the file can be written to. :returns: `True` if the file can be written to. If `False`, `write` will raise an exception. )r � FLAG_WRITEr r r r! �writable| r2 zBufferedFile.writablec C � dS )z� Check if the file supports random access. :returns: `True` if the file supports random access. If `False`, `seek` will raise an exception. Fr r r r r! �seekable� s zBufferedFile.seekablec C s& | � t|��}||dt|��< t|�S )z� Read up to ``len(buff)`` bytes into ``bytearray`` *buff* and return the number of bytes read. :returns: The number of bytes read. N)�read�len)r �buff�datar r r! �readinto� s zBufferedFile.readintoNc C s� | j rtd��| j| j@ std��|du s|dk rgt| j�}t� | _| jt|�7 _ z| � | j �}W n t y? d}Y nw |du sJt|�dkrO t|�S |� |� | j t|�7 _ | jt|�7 _q,|t| j�kr�| jd|� }| j|d� | _| jt|�7 _|S t| j�|k r�|t| j� }| j| j@ r�t| j|�}z| � |�}W n t y� d}Y nw |du s�t|�dkr�n| j|7 _| j t|�7 _ t| j�|k s�| jd|� }| j|d� | _| jt|�7 _|S )a� Read at most ``size`` bytes from the file (less if we hit the end of the file first). If the ``size`` argument is negative or omitted, read all the remaining data in the file. .. note:: ``'b'`` mode flag is ignored (``self.FLAG_BINARY`` in ``self._flags``), because SSH treats all files as binary, since we have no idea what encoding the file is in, or even if the file is text data. :param int size: maximum number of bytes to read :returns: data read from the file (as bytes), or an empty string if EOF was encountered immediately �File is closedz File is not open for readingNr )r �IOErrorr r0 � bytearrayr r r r8 �_readr �EOFError�extendr � FLAG_BUFFERED�maxr )r �size�result�new_data� read_sizer r r! r7 � sX � �� �� zBufferedFile.readc C s� | j rtd��| j| j@ std��| j}d} | jr@| j| j@ r@t|�dkr@|d tkr8|dd� }| � t � n| � t � d| _|dure|dkret|�|kr^||d� | _|d|� }d}n]|t|� }n| j }t |v sv| j| j@ rwt |v rwnDz| �|�}W n ty� d}Y nw |du s�t|�dkr�t� | _| jt|�7 _| j| j@ r�|S t|�S ||7 }| jt|�7 _q|�t �}| j| j@ r�|�t �}|dkr�||k s�|dk r�|}|dkr�| jt|�7 _| j| j@ r�|S t|�S |d }|| tk�r|t|�k �r|| tk�r|d7 }|�r ||d� | j | _n||d� | _|||� } |d|� t }t| j�dk�rC| t k�rCd| _n| � | � | jt|�7 _| j| j@ �rZ|S t|�S ) a� Read one entire line from the file. A trailing newline character is kept in the string (but may be absent when a file ends with an incomplete line). If the size argument is present and non-negative, it is a maximum byte count (including the trailing newline) and an incomplete line may be returned. An empty string is returned only when EOF is encountered immediately. .. note:: Unlike stdio's ``fgets``, the returned string contains null characters (``'\0'``) if they occurred in the input. :param int size: maximum length of returned string. :returns: next line of the file, or an empty string if the end of the file has been reached. If the file was opened in binary (``'b'``) mode: bytes are returned Else: the encoding of the file is assumed to be UTF-8 and character strings (`str`) are returned r< zFile not open for readingFTr r N���)r r= r r0 r r �FLAG_UNIVERSAL_NEWLINEr8 r �_record_newliner r r r r? r@ r r � FLAG_BINARYr r �findr ) r rD r- � truncated�nrF �pos�rpos�xpos�lfr r r! r+ � s� � � � �� ) zBufferedFile.readlinec C sR g }d} | � � }t|�dkr |S |�|� |t|�7 }|dur(||kr( |S q)a� Read all remaining lines using `readline` and return them as a list. If the optional ``sizehint`` argument is present, instead of reading up to EOF, whole lines totalling approximately sizehint bytes (possibly after rounding up to an internal buffer size) are read. :param int sizehint: desired maximum number of bytes to read. :returns: list of lines read from the file. r TN)r+ r8 �append)r �sizehint�lines� byte_countr- r r r! � readlines@ s � �zBufferedFile.readlinesc C � t d��)a� Set the file's current position, like stdio's ``fseek``. Not all file objects support seeking. .. note:: If a file is opened in append mode (``'a'`` or ``'a+'``), any seek operations will be undone at the next write (as the file position will move back to the end of the file). :param int offset: position to move to within the file, relative to ``whence``. :param int whence: type of movement: 0 = absolute; 1 = relative to the current position; 2 = relative to the end of the file. :raises: ``IOError`` -- if the file doesn't support random access. z File does not support seeking.�r= )r �offset�whencer r r! �seekV s zBufferedFile.seekc C � | j S )z� Return the file's current position. This may not be accurate or useful if the underlying file doesn't support random access, or was opened in append mode. :returns: file position (`number <int>` of bytes). )r r r r r! �tellj s zBufferedFile.tellc C s� t |t�r |�d�}| jrtd��| j| j@ std��| j| j@ s(| �|� dS | j � |� | j| j @ ri|� t �}|dkrg| j �� }|t|�t|� 7 }| �|d|d � � t� | _ | j � ||d d� � dS | j �� | jkru| �� dS )a8 Write data to the file. If write buffering is on (``bufsize`` was specified and non-zero), some or all of the data may not actually be written yet. (Use `flush` or `close` to force buffered data to be written out.) :param data: ``str``/``bytes`` data to write zutf-8r< zFile not open for writingNr r )� isinstance�str�encoder r= r r3 rB r) r �write�FLAG_LINE_BUFFERED�rfindr r* r8 r r^ r r( )r r: �last_newline_pos�wbufr r r! rb t s, zBufferedFile.writec C s |D ]}| � |� qdS )a? Write a sequence of strings to the file. The sequence can be any iterable object producing strings, typically a list of strings. (The name is intended to match `readlines`; `writelines` does not add line separators.) :param sequence: an iterable sequence of strings. N)rb )r �sequencer- r r r! � writelines� s zBufferedFile.writelinesc C s | S )z Identical to ``iter(f)``. This is a deprecated file interface that predates Python iterator support. r r r r r! � xreadlines� s zBufferedFile.xreadlinesc C r] r# )r r r r r! �closed� s zBufferedFile.closedc C s t � �)z� (subclass override) Read data from the stream. Return ``None`` or raise ``EOFError`` to indicate EOF. )r@ )r rD r r r! r? � s zBufferedFile._readc C rX )zI (subclass override) Write data into the stream. zwrite not implementedrY )r r: r r r! �_write� s zBufferedFile._writec C r5 )ai (subclass override) Return the size of the file. This is called from within `_set_mode` if the file is opened in append mode, so the file position can be tracked and `seek` and `tell` will work correctly. If the file is a stream that can't be randomly accessed, you don't need to override this method, r r r r r r! � _get_size� s zBufferedFile._get_size�rrH c C s: | j | _|dk r d}|dkr| j| j| jB O _n)|dkr3|| _| j| jO _| j| j M _n|dkrC| j| j| jB M _d|v sKd|v rS| j| jO _d|v s[d|v rc| j| jO _d|v r~| j| j| jB O _| �� | _ | j | _ | _ d|v r�| j| j O _d|v r�| j| j O _d | _d S d S ) zM Subclasses call this method to initialize the BufferedFile. r r rm �+�w�a�b�UN)r r r rB rc r0 r3 � FLAG_APPENDrl r r r rK rI r )r �mode�bufsizer r r! � _set_mode� s2 �zBufferedFile._set_modec C s� t |�}t|�dkr>| �|�}||d � }| j| j@ r*| j|7 _| j | _| _n| j|7 _| j|7 _t|�dks d S )Nr )� memoryviewr8 rk r rs r r r )r �raw_datar: �countr r r! r) � s � zBufferedFile._write_allc C sl | j | j@ sd S | jd u r|| _d S | j|kr%t| jt�r%| j|f| _d S || jvr4| j|f7 _d S d S r# )r rI r r_ r )r �newliner r r! rJ s �z BufferedFile._record_newliner# )r )rm rH ))�__name__� __module__� __qualname__�__doc__r �SEEK_SET�SEEK_CUR�SEEK_ENDr0 r3 rs rK rB rc rI r" r% r' r$ r( r. r1 r4 r6 r; r7 r+ rW r\ r^ rb rh ri �propertyrj r? rk rl rv r) rJ r r r r! r sN ; i $ ( r N) �ior �paramiko.commonr r r r r � paramiko.utilr r r r r r r! �<module> s
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