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lzma.cpython-310.pyc
o }5h3 @ s d Z g dZddlZddlZddlZddlT ddlmZmZ ddlZdZ dZ dZ G dd d ej Z ddd dddddd d dZed ddfddZeddfddZdS )aS Interface to the liblzma compression library. This module provides a class for reading and writing compressed files, classes for incremental (de)compression, and convenience functions for one-shot (de)compression. These classes and functions support both the XZ and legacy LZMA container formats, as well as raw compressed data streams. )$ CHECK_NONE CHECK_CRC32 CHECK_CRC64 CHECK_SHA256 CHECK_ID_MAX CHECK_UNKNOWN FILTER_LZMA1 FILTER_LZMA2 FILTER_DELTA FILTER_X86 FILTER_IA64 FILTER_ARMFILTER_ARMTHUMBFILTER_POWERPC FILTER_SPARC FORMAT_AUTO FORMAT_XZ FORMAT_ALONE FORMAT_RAWMF_HC3MF_HC4MF_BT2MF_BT3MF_BT4 MODE_FAST MODE_NORMALPRESET_DEFAULTPRESET_EXTREMELZMACompressorLZMADecompressorLZMAFile LZMAErroropencompress decompressis_check_supported N)*)_encode_filter_properties_decode_filter_properties c @ s e Zd ZdZd"dddddddZdd Zed d Zd d Zdd Z dd Z dd Z d#ddZ d#ddZ d#ddZd#ddZd d Zejfd d Zd d! ZdS )$r a@ A file object providing transparent LZMA (de)compression. An LZMAFile can act as a wrapper for an existing file object, or refer directly to a named file on disk. Note that LZMAFile provides a *binary* file interface - data read is returned as bytes, and data to be written must be given as bytes. Nrformatcheckpresetfiltersc C s( d| _ d| _t| _|dv r&|dkrtd|dur td|du r#t}t}n |dv r?|du r0t}t}t ||||d| _ d | _ ntd |t |tttjfred |vrW|d 7 }t||| _ d | _|| _nt|d sot|drv|| _ || _ntd| jtkrtj| j tt||d}t|| _ dS dS )a Open an LZMA-compressed file in binary mode. filename can be either an actual file name (given as a str, bytes, or PathLike object), in which case the named file is opened, or it can be an existing file object to read from or write to. mode can be "r" for reading (default), "w" for (over)writing, "x" for creating exclusively, or "a" for appending. These can equivalently be given as "rb", "wb", "xb" and "ab" respectively. format specifies the container format to use for the file. If mode is "r", this defaults to FORMAT_AUTO. Otherwise, the default is FORMAT_XZ. check specifies the integrity check to use. This argument can only be used when opening a file for writing. For FORMAT_XZ, the default is CHECK_CRC64. FORMAT_ALONE and FORMAT_RAW do not support integrity checks - for these formats, check must be omitted, or be CHECK_NONE. When opening a file for reading, the *preset* argument is not meaningful, and should be omitted. The *filters* argument should also be omitted, except when format is FORMAT_RAW (in which case it is required). When opening a file for writing, the settings used by the compressor can be specified either as a preset compression level (with the *preset* argument), or in detail as a custom filter chain (with the *filters* argument). For FORMAT_XZ and FORMAT_ALONE, the default is to use the PRESET_DEFAULT preset level. For FORMAT_RAW, the caller must always specify a filter chain; the raw compressor does not support preset compression levels. preset (if provided) should be an integer in the range 0-9, optionally OR-ed with the constant PRESET_EXTREME. filters (if provided) should be a sequence of dicts. Each dict should have an entry for "id" indicating ID of the filter, plus additional entries for options to the filter. NF)r+ rbr, zACannot specify an integrity check when opening a file for readingzICannot specify a preset compression level when opening a file for reading)wwbaabxxbr- r% zInvalid mode: {!r}bTreadwritez6filename must be a str, bytes, file or PathLike object)trailing_errorr. r1 ) _fp_closefp _MODE_CLOSED_mode ValueErrorr _MODE_READr _MODE_WRITEr _compressor_posr. isinstancestrbytesosPathLikebuiltinsr! hasattr TypeError _compressionDecompressReaderr r ioBufferedReader_buffer) selffilenamemoder. r/ r0 r1 mode_coderaw rX /usr/lib/python3.10/lzma.py__init__1 sH , zLZMAFile.__init__c C s | j tkrdS zK| j tkr| j d| _n| j tkr'| j| j d| _W z | j r=| j W d| _d| _ t| _ dS W d| _d| _ t| _ dS d| _d| _ t| _ w z | j rg| j W d| _d| _ t| _ w W d| _d| _ t| _ w d| _d| _ t| _ w )zFlush and close the file. May be called more than once without error. Once the file is closed, any other operation on it will raise a ValueError. NF) r@ r? rB rR closerC r= r; rD flushr> rS rX rX rY r[ sH zLZMAFile.closec C s | j tkS )z True if this file is closed.)r@ r? r] rX rX rY closed s zLZMAFile.closedc C s | | j S )z3Return the file descriptor for the underlying file.)_check_not_closedr= filenor] rX rX rY r` zLZMAFile.filenoc C s | o| j S )z)Return whether the file supports seeking.)readablerR seekabler] rX rX rY rc s zLZMAFile.seekablec C | | jtkS )z/Return whether the file was opened for reading.)r_ r@ rB r] rX rX rY rb ra zLZMAFile.readablec C rd )z/Return whether the file was opened for writing.)r_ r@ rC r] rX rX rY writable ra zLZMAFile.writablec C | | j|S )zReturn buffered data without advancing the file position. Always returns at least one byte of data, unless at EOF. The exact number of bytes returned is unspecified. )_check_can_readrR peekrS sizerX rX rY rh s z LZMAFile.peekc C rf )zRead up to size uncompressed bytes from the file. If size is negative or omitted, read until EOF is reached. Returns b"" if the file is already at EOF. )rg rR r: ri rX rX rY r: s z LZMAFile.readc C s" | |dk r tj}| j|S )zRead up to size uncompressed bytes, while trying to avoid making multiple reads from the underlying stream. Reads up to a buffer's worth of data if size is negative. Returns b"" if the file is at EOF. r% )rg rP DEFAULT_BUFFER_SIZErR read1ri rX rX rY rl s zLZMAFile.read1c C rf )a Read a line of uncompressed bytes from the file. The terminating newline (if present) is retained. If size is non-negative, no more than size bytes will be read (in which case the line may be incomplete). Returns b'' if already at EOF. )rg rR readlineri rX rX rY rm s zLZMAFile.readlinec C sX | t|ttfrt|}nt|}|j}| j|}| j | | j |7 _ |S )a Write a bytes object to the file. Returns the number of uncompressed bytes written, which is always the length of data in bytes. Note that due to buffering, the file on disk may not reflect the data written until close() is called. ) _check_can_writerF rH bytearraylen memoryviewnbytesrD r" r= r; rE )rS datalength compressedrX rX rY r; s zLZMAFile.writec C s | | j||S )a Change the file position. The new position is specified by offset, relative to the position indicated by whence. Possible values for whence are: 0: start of stream (default): offset must not be negative 1: current stream position 2: end of stream; offset must not be positive Returns the new file position. Note that seeking is emulated, so depending on the parameters, this operation may be extremely slow. )_check_can_seekrR seek)rS offsetwhencerX rX rY rw s z LZMAFile.seekc C s" | | jtkr| j S | jS )z!Return the current file position.)r_ r@ rB rR tellrE r] rX rX rY rz s z LZMAFile.tell)Nr+ )r, )__name__ __module__ __qualname____doc__rZ r[ propertyr^ r` rc rb re rh r: rl rm r; rP SEEK_SETrw rz rX rX rX rY r & s& U r r2 r, )r. r/ r0 r1 encodingerrorsnewlinec C s d|v rd|v rt d|f n|durt d|dur t d|dur(t d|dd} t| | ||||d } d|v rIt|}t| |||S | S ) a Open an LZMA-compressed file in binary or text mode. filename can be either an actual file name (given as a str, bytes, or PathLike object), in which case the named file is opened, or it can be an existing file object to read from or write to. The mode argument can be "r", "rb" (default), "w", "wb", "x", "xb", "a", or "ab" for binary mode, or "rt", "wt", "xt", or "at" for text mode. The format, check, preset and filters arguments specify the compression settings, as for LZMACompressor, LZMADecompressor and LZMAFile. For binary mode, this function is equivalent to the LZMAFile constructor: LZMAFile(filename, mode, ...). In this case, the encoding, errors and newline arguments must not be provided. For text mode, an LZMAFile object is created, and wrapped in an io.TextIOWrapper instance with the specified encoding, error handling behavior, and line ending(s). tr9 zInvalid mode: %rNz0Argument 'encoding' not supported in binary modez.Argument 'errors' not supported in binary modez/Argument 'newline' not supported in binary mode r- )rA replacer rP text_encoding TextIOWrapper) rT rU r. r/ r0 r1 r r r lz_mode binary_filerX rX rY r! s$ r! c C s t ||||}|| | S )zCompress a block of data. Refer to LZMACompressor's docstring for a description of the optional arguments *format*, *check*, *preset* and *filters*. For incremental compression, use an LZMACompressor instead. )r r" r\ )rs r. r/ r0 r1 comprX rX rY r" ? s r" c C sj g } t |||}z|| }W n ty |rY n w || |js)td|j} | s/nqd|S )zDecompress a block of data. Refer to LZMADecompressor's docstring for a description of the optional arguments *format*, *check* and *filters*. For incremental decompression, use an LZMADecompressor instead. TzACompressed data ended before the end-of-stream marker was reached )r r# r appendeof unused_datajoin)rs r. memlimitr1 resultsdecompresrX rX rY r# K s$ r# )r2 )r~ __all__rK rP rI _lzmar' r( rN r? rB rC BaseStreamr r! r r" r r# rX rX rX rY <module> s& j 0