î
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d d d
d d d d d d d d d d d d d d d d d d d d! d" d# d$ g$ Z d% d& l Z d% d& l Z d% d' l Td% d( l m Z m Z d% Z d) Z d* Z d+ Z
d, Z Gd- d „ d e j ƒ Z
d. d/ d& d0 d) d1 d& d2 d& d3 d& d4 d& d5 d& d6 d! „Z e d) d& d& d7 d" „ Z e d& d& d8 d# „ Z d& S)9aS 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.
Z
CHECK_NONEZ CHECK_CRC32Z CHECK_CRC64Z CHECK_SHA256Z CHECK_ID_MAXZ
CHECK_UNKNOWNZ FILTER_LZMA1Z FILTER_LZMA2Z FILTER_DELTAZ
FILTER_X86Z FILTER_IA64Z
FILTER_ARMZFILTER_ARMTHUMBZFILTER_POWERPCZ FILTER_SPARCÚ FORMAT_AUTOÚ FORMAT_XZZ FORMAT_ALONEZ
FORMAT_RAWZMF_HC3ZMF_HC4ZMF_BT2ZMF_BT3ZMF_BT4Z MODE_FASTZ MODE_NORMALZPRESET_DEFAULTZPRESET_EXTREMEÚLZMACompressorÚLZMADecompressorÚLZMAFileÚ LZMAErrorÚopenÚcompressÚ
decompressZis_check_supportedé N)Ú*)Ú_encode_filter_propertiesÚ_decode_filter_propertiesé é é i c @ sW e Z d Z d Z d d d d d d7 d d d d d d
„Z d d „ Z e d
d „ ƒ Z d d „ Z d d „ Z d d „ Z
d d „ Z d d „ Z d d „ Z
d d „ Z d d „ Z d d „ Z d! d" d# „ Z d! d$ d% „ Z d8 d& d' „ Z d9 d( d) „ Z d: d* d+ „ Z d; d, d- „ Z d. d/ „ Z d0 d1 „ Z d2 d3 d4 „ Z d5 d6 „ Z d S) ˆ s zLZMAFile.closec C s
| j t k S)z True if this file is closed.)r% r$ )r6 r9 r9 r: Úclosed s zLZMAFile.closedc C s | j ƒ | j j ƒ S)z3Return the file descriptor for the underlying file.)Ú_check_not_closedr" Úfileno)r6 r9 r9 r: rA ¥ s
zLZMAFile.filenoc C s | j ƒ o | j j ƒ S)z)Return whether the file supports seeking.)Úreadabler" Úseekable)r6 r9 r9 r: rC ª s zLZMAFile.seekablec C s | j ƒ | j t t f k S)z/Return whether the file was opened for reading.)r@ r% r) r< )r6 r9 r9 r: rB ® s
zLZMAFile.readablec C s | j ƒ | j t k S)z/Return whether the file was opened for writing.)r@ r% r. )r6 r9 r9 r: Úwritable³ s
zLZMAFile.writablec C s | j r t d ƒ ‚ n d S)Nz I/O operation on closed file)r? r( )r6 r9 r9 r: r@ º s zLZMAFile._check_not_closedc C s5 | j t t f k r1 | j ƒ t j d ƒ ‚ n d S)NzFile not open for reading)r% r) r< r@ ÚioÚUnsupportedOperation)r6 r9 r9 r: Ú_check_can_read¾ s
zLZMAFile._check_can_readc C s/ | j t k r+ | j ƒ t j d ƒ ‚ n d S)NzFile not open for writing)r% r. r@ rE rF )r6 r9 r9 r: Ú_check_can_writeà s
zLZMAFile._check_can_writec C sV | j t t f k r1 | j ƒ t j d ƒ ‚ n | j j ƒ sR t j d ƒ ‚ n d S)Nz3Seeking is only supported on files open for readingz3The underlying file object does not support seeking)r% r) r< r@ rE rF r" rC )r6 r9 r9 r: Ú_check_can_seekÈ s
zLZMAFile._check_can_seekc C s | j t k r d Sxú | j t | j ƒ k r| j j pI | j j t ƒ } | s† | j j
rw t | _ | j | _ d St
d ƒ ‚ n | j j
rî t | j | _ y | j j | ƒ | _ Wqt k
rê t | _ | j | _ d SYqXn | j j | ƒ | _ d | _ q Wd S)NFzACompressed file ended before the end-of-stream marker was reachedr
T)r% r< r- Úlenr, r+ Ú unused_datar" r Ú _BUFFER_SIZEÚeofr& r' ÚEOFErrorr r* r r )r6 Zrawblockr9 r9 r: Ú _fill_bufferÒ s,
zLZMAFile._fill_bufferTc C sŒ | j | j d … | _ d | _ g } xJ | j ƒ rt | rP | j | j ƒ n | j t | j ƒ 7_ d | _ q+ W| rˆ d j | ƒ Sd S)Nr
r )r, r- rO Úappendr& rJ Újoin)r6 Ú return_dataÚblocksr9 r9 r: Ú _read_allõ s
zLZMAFile._read_allc C sC | j | } | t | j ƒ k rd | j | j | … } | | _ | j t | ƒ 7_ | r` | Sd S| j | j d … | _ d | _ g } x | d k r+| j ƒ r+| t | j ƒ k rÛ | j d | … } | | _ n | j } d | _ | r| j | ƒ n | j t | ƒ 7_ | t | ƒ 8} q W| r?d j | ƒ Sd S)Nr
r )r- rJ r, r& rO rP rQ )r6 ÚnrR ÚendÚdatarS r9 r9 r: Ú _read_block s*
zLZMAFile._read_blockc C s. | j ƒ | j ƒ s d S| j | j d … S)z¿Return 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.
r N)rG rO r, r- )r6 Úsizer9 r9 r: Úpeek! s
z
LZMAFile.peekc C sA | j ƒ | d k r d S| d k r0 | j ƒ S| j | ƒ Sd S)z±Read 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.
r
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z
LZMAFile.readc C sÁ | j ƒ | d k s; | j t | j ƒ k r? | j ƒ r? d S| d k r€ | j | j | j | … } | j t | ƒ 7_ n( | j | j d … } d | _ d | _ | j t | ƒ 7_ | S)z¨Read up to size uncompressed bytes, while trying to avoid
making multiple reads from the underlying stream.
Returns b"" if the file is at EOF.
r
r N)rG r- rJ r, rO r& )r6 rY rW r9 r9 r: Úread1: s
% zLZMAFile.read1c C sŒ | j ƒ | d k ry | j j d | j ƒ d } | d k ry | j | j | … } | | _ | j t | ƒ 7_ | Sn t j j | | ƒ S)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.
r
s
r ) rG r, Úfindr- r& rJ rE ÚBufferedIOBaseÚreadline)r6 rY rV Úliner9 r9 r: r^ T s
zLZMAFile.readlinec C sK | j ƒ | j j | ƒ } | j j | ƒ | j t | ƒ 7_ t | ƒ S)z÷Write a bytes object to the file.
Returns the number of uncompressed bytes written, which is
always len(data). Note that due to buffering, the file on disk
may not reflect the data written until close() is called.
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compressedr9 r9 r: r f s
zLZMAFile.writec C sM | j j d d ƒ t | _ d | _ t | j | _ d | _ d | _ d S)Nr
r )
r" Úseekr) r% r& r r* r+ r, r- )r6 r9 r9 r: Ú_rewindt s zLZMAFile._rewindr
c C sË | j ƒ | d k r no | d k r5 | j | } nS | d k rs | j d k rc | j d d ƒ n | j | } n t d j | ƒ ƒ ‚ | | j k r¤ | j ƒ n
| | j 8} | j | d d ƒ| j S)að 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, sp depending on the parameters,
this operation may be extremely slow.
r
r r rR Fz Invalid value for whence: {})rI r& r' rT r( r ra rX )r6 ÚoffsetÚwhencer9 r9 r: r` | s
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LZMAFile.seekc C s | j ƒ | j S)z!Return the current file position.)r@ r& )r6 r9 r9 r: Útell¥ s
z
LZMAFile.tellr! r! r! r! r! )Ú__name__Ú
__module__Ú __qualname__Ú__doc__r; r> Úpropertyr? rA rC rB rD r@ rG rH rI rO rT rX rZ r r[ r^ r ra r` rd r9 r9 r9 r: r & s0 !V
# )r r r r r ÚencodingÚerrorsÚnewlinec C så d | k r1 d | k r‚ t d | f ƒ ‚ q‚ nQ | d k rL t d ƒ ‚ n | d k rg t d ƒ ‚ n | d k r‚ t d ƒ ‚ n | j d d ƒ } t | | d | d
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Sd S)
a Open an LZMA-compressed file in binary or text mode.
filename can be either an actual file name (given as a str or bytes
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, a LZMAFile object is created, and wrapped in an
io.TextIOWrapper instance with the specified encoding, error
handling behavior, and line ending(s).
Útr zInvalid mode: %rNz0Argument 'encoding' not supported in binary modez.Argument 'errors' not supported in binary modez/Argument 'newline' not supported in binary modeÚ r r r r )r( Úreplacer rE Ú
TextIOWrapper) r7 r8 r r r r rj rk rl Zlz_modeZ binary_filer9 r9 r: r « s c C s, t | | | | ƒ } | j | ƒ | j ƒ S)zãCompress 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= )rW r r r r Úcompr9 r9 r: r Ú s c C s™ g } xƒ t | | | ƒ } y | j | ƒ } Wn t k
rO | rH Pn ‚ Yn X| j | ƒ | j su t d ƒ ‚ n | j } | s Pq q Wd j | ƒ S)záDecompress 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.
zACompressed data ended before the end-of-stream marker was reachedr )r r r rP rM rK rQ )rW r Zmemlimitr ZresultsZdecompÚresr9 r9 r: r æ s
)rh Ú__all__r3 rE Z_lzmar r
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