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file_part.cpython-39.pyc
a +(Wg� � @ sZ d Z ddlmZ ddlmZ ddlmZ ddlmZ ddlZddlZG dd� dej�Z dS ) z8FilePart implementation for representing part of a file.� )�absolute_import)�print_function)�division)�unicode_literalsNc @ s� e Zd ZdZdd� Zdd� Zdd� Zdd � Zd&d d �Ze j fd d�Z dd� Z d'dd�Z d(dd�Zd)dd�Zd*dd�Zd+dd�Zd,d d �Zd-d d �Zd.d d!�Zd/d"d#�Zd0d$d%�ZdS )1�FileParta Subclass of the file API for representing part of a file. This class behaves as a contiguous subset of a given file (e.g., this object will behave as though the desired part of the file was written to another file, and the second file was opened). c C s8 t |d�| _|| _|| _| j| j | _| j�| j� dS )aF Initializes the FilePart. Args: filename: The name of the existing file, of which this object represents a part. offset: The position (in bytes) in the original file that corresponds to the first byte of the FilePart. length: The total number of bytes in the FilePart. �rbN)�open�_fp�length�_start�_end�seek)�self�filename�offsetr � r � /opt/gsutil/gslib/file_part.py�__init__# s zFilePart.__init__c C s d S �Nr �r r r r � __enter__3 s zFilePart.__enter__c C s | � � d S r )�close)r �type�value� tracebackr r r �__exit__7 s zFilePart.__exit__c C s | j �� | j S r )r �tellr r r r r r : s z FilePart.tell���c C s6 |dk r| j }t|| j| j�� �}| j�td|��S )Nr )r �minr r r �read�max�r �sizer r r r = s z FilePart.readc C sJ |t jkr | j�|| j �S |t jkr4| j�||�S | j�| j| �S d S r )�os�SEEK_ENDr r r �SEEK_CURr )r r �whencer r r r C s z FilePart.seekc C s | j �� d S r )r r r r r r r K s zFilePart.closeNc C s t d��d S )Nz%flush is not implemented in FilePart.��NotImplementedErrorr! r r r �flushN s zFilePart.flushc C s t d��d S )Nz&fileno is not implemented in FilePart.r' r! r r r �filenoQ s zFilePart.filenoc C s t d��d S )Nz&isatty is not implemented in FilePart.r' r! r r r �isattyT s zFilePart.isattyc C s t d��d S )Nz$next is not implemented in FilePart.r' r! r r r �nextW s z FilePart.nextc C s t d��d S )Nz(readline is not implemented in FilePart.r' r! r r r �readlineZ s zFilePart.readlinec C s t d��d S )Nz)readlines is not implemented in FilePart.r' r! r r r � readlines] s zFilePart.readlinesc C s t d��d S )Nz*xreadlines is not implemented in FilePart.r' r! r r r � xreadlines` s zFilePart.xreadlinesc C s t d��d S )Nz(truncate is not implemented in FilePart.r' r! r r r �truncatec s zFilePart.truncatec C s t d��d S )Nz%write is not implemented in FilePart.r' r! r r r �writef s zFilePart.writec C s t d��d S )Nz*writelines is not implemented in FilePart.r' r! r r r � writelinesi s zFilePart.writelines)r )N)N)N)N)N)N)N)N)N)N)�__name__� __module__� __qualname__�__doc__r r r r r r# �SEEK_SETr r r) r* r+ r, r- r. r/ r0 r1 r2 r r r r r s$ r ) r6 � __future__r r r r r# �io�IOBaser r r r r �<module> s
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