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o }5hYU @ s d Z ddlZddlZddlZddlZddlZddlZddlZddlZg dZ d\Z Z Z Z Zd\ZZdZdZdZd edddfd d Zd d ZG dd dZG dd deZG dd dejZG dd dejZ efddddZ dd Z dd Z e d kre dS dS ) zFunctions that read and write gzipped files. The user of the file doesn't have to worry about the compression, but random access is not allowed. N) BadGzipFileGzipFileopencompress decompress) )r r r rbc C s d|v rd|v rt d|f n|durt d|dur t d|dur(t d|dd}t| tttjfr>t| ||}nt| d sHt| d rPtd||| }nt d d|v ret |}t ||||S |S ) a Open a gzip-compressed file in binary or text mode. The filename argument can be an actual filename (a str or bytes object), or an existing file object to read from or write to. The mode argument can be "r", "rb", "w", "wb", "x", "xb", "a" or "ab" for binary mode, or "rt", "wt", "xt" or "at" for text mode. The default mode is "rb", and the default compresslevel is 9. For binary mode, this function is equivalent to the GzipFile constructor: GzipFile(filename, mode, compresslevel). In this case, the encoding, errors and newline arguments must not be provided. For text mode, a GzipFile object is created, and wrapped in an io.TextIOWrapper instance with the specified encoding, error handling behavior, and line ending(s). tbzInvalid mode: %rNz0Argument 'encoding' not supported in binary modez.Argument 'errors' not supported in binary modez/Argument 'newline' not supported in binary mode readwritez1filename must be a str or bytes object, or a file) ValueErrorreplace isinstancestrbytesosPathLiker hasattr TypeErrorio text_encoding TextIOWrapper)filenamemode compresslevelencodingerrorsnewlinegz_mode binary_file r( /usr/lib/python3.10/gzip.pyr s( r c C s | td| d S )Nz<L)r structpack)outputvaluer( r( r) write32uF s r. c @ s< e Zd ZdZdddZdd ZdddZd d Zd d Zd S ) _PaddedFilezMinimal read-only file object that prepends a string to the contents of an actual file. Shouldn't be used outside of gzip.py, as it lacks essential functionality. c C s || _ t|| _|| _d| _d S Nr )_bufferlen_lengthfile_read)selffprependr( r( r) __init__P s z_PaddedFile.__init__c C sz | j d u r | j|S | j | | jkr%| j }| j |7 _ | j|| j S | j }d | _ | j|d | j|| j | S N)r6 r5 r r4 r2 )r7 sizer r( r( r) r V s z_PaddedFile.readc C s> | j d u r || _n | j t|8 _ d S t| j| _d| _ d S r1 )r6 r2 r3 r4 )r7 r9 r( r( r) r9 c s z_PaddedFile.prependc C s d | _ d | _| j|S r; )r6 r2 r5 seek)r7 offr( r( r) r= l s z_PaddedFile.seekc C dS NTr( r7 r( r( r) seekableq z_PaddedFile.seekableN)r0 ) __name__ __module__ __qualname____doc__r: r r9 r= rB r( r( r( r) r/ K s r/ c @ s e Zd ZdZdS )r z6Exception raised in some cases for invalid gzip files.N)rD rE rF rG r( r( r( r) r u s r c @ s e Zd ZdZdZddeddfddZedd Zedd Z d d Z d d Z d d Z dd Z d,ddZd,ddZdd Zedd Zdd Zejfd d Zd d Zd d! Zd"d# Zd$d% Zd&d' Zej fd(d)Z d,d*d+Z dS )-r a The GzipFile class simulates most of the methods of a file object with the exception of the truncate() method. This class only supports opening files in binary mode. If you need to open a compressed file in text mode, use the gzip.open() function. Nc C sV |rd|v s d|v rt d||rd|vr|d7 }|du r*t||p%d }| _|du r>t|dd}t|ttfs=d}nt |}|}|du rOt|d d}| d ret | _ t|}t|| _|| _n5| d r|du ryd dl}|d td t| _ | | t|tjtj tj d | _ || _ nt d||| _ | j tkr| | dS dS )aG Constructor for the GzipFile class. At least one of fileobj and filename must be given a non-trivial value. The new class instance is based on fileobj, which can be a regular file, an io.BytesIO object, or any other object which simulates a file. It defaults to None, in which case filename is opened to provide a file object. When fileobj is not None, the filename argument is only used to be included in the gzip file header, which may include the original filename of the uncompressed file. It defaults to the filename of fileobj, if discernible; otherwise, it defaults to the empty string, and in this case the original filename is not included in the header. The mode argument can be any of 'r', 'rb', 'a', 'ab', 'w', 'wb', 'x', or 'xb' depending on whether the file will be read or written. The default is the mode of fileobj if discernible; otherwise, the default is 'rb'. A mode of 'r' is equivalent to one of 'rb', and similarly for 'w' and 'wb', 'a' and 'ab', and 'x' and 'xb'. The compresslevel argument is an integer from 0 to 9 controlling the level of compression; 1 is fastest and produces the least compression, and 9 is slowest and produces the most compression. 0 is no compression at all. The default is 9. The mtime argument is an optional numeric timestamp to be written to the last modification time field in the stream when compressing. If omitted or None, the current time is used. r UzInvalid mode: {!r}r Nr namer r! r)waxr zGzipFile was opened for writing, but this will change in future Python releases. Specify the mode argument for opening it for writing.r )!r formatbuiltinsr myfileobjgetattrr r r r fspath startswithREADr! _GzipReaderr BufferedReaderr2 rI warningswarn FutureWarningWRITE _init_writezlib compressobjDEFLATED MAX_WBITS DEF_MEM_LEVELr _write_mtimefileobj_write_gzip_header) r7 r r! r" rb mtimeorigmoderawrW r( r( r) r: sR # zGzipFile.__init__c C sB dd l }|dtd | jtkr | jdd dkr | jd S | jS )Nr zuse the name attributer .gz)rW rX DeprecationWarningr! rZ rI )r7 rW r( r( r) r s zGzipFile.filenamec C s | j jjS )z0Last modification time read from stream, or None)r2 rf _last_mtimerA r( r( r) rd s zGzipFile.mtimec C s. t | j}d|dd d tt| d S )Nz<gzip r >)reprrb hexid)r7 sr( r( r) __repr__ s $zGzipFile.__repr__c C s. || _ td| _d| _g | _d| _d| _d S Nr0 r )rI r\ crc32crcr< writebufbufsizeoffset)r7 r r( r( r) r[ s zGzipFile._init_writec C s | j d | j d z tj| j}t|ts |d}| dr)|d d }W n t y5 d}Y nw d}|r<t }| j t |d | j }|d u rRt }t| j t| |tkrad}n |tkrhd }nd }| j | | j d |r| j |d d S d S ) N zlatin-1s .gzrg r0 r )rb r r pathbasenamerI r r encodeendswithUnicodeEncodeErrorFNAMEchrra timer. int_COMPRESS_LEVEL_BEST_COMPRESS_LEVEL_FAST)r7 r" fnameflagsrd xflr( r( r) rc s< zGzipFile._write_gzip_headerc C s | | jtkrdd l}t|jd| jd u r tdt|t t fr(t |}nt |}|j }|dkrS| j| j| | j|7 _t|| j| _| j|7 _|S )Nr z$write() on read-only GzipFile objectz!write() on closed GzipFile object)_check_not_closedr! rZ errnoOSErrorEBADFrb r r r bytearrayr3 memoryviewnbytesr r r< r\ rt ru rx )r7 datar lengthr( r( r) r s zGzipFile.writerk c C 2 | | jtkrdd l}t|jd| j|S )Nr z$read() on write-only GzipFile object)r r! rT r r r r2 r r7 r< r r( r( r) r ( z GzipFile.readc C s@ | | jtkrddl}t|jd|dk rtj}| j |S )zdImplements BufferedIOBase.read1() Reads up to a buffer's worth of data if size is negative.r Nz%read1() on write-only GzipFile object) r r! rT r r r r DEFAULT_BUFFER_SIZEr2 read1r r( r( r) r / s zGzipFile.read1c C r )Nr z$peek() on write-only GzipFile object)r r! rT r r r r2 peek)r7 nr r( r( r) r < r z GzipFile.peekc C s | j d u S r; rb rA r( r( r) closedC s zGzipFile.closedc C s | j }|d u r d S d | _ z7| jtkr)|| j t|| j t|| jd@ n | jt kr3| j W | j }|rBd | _ | d S d S | j }|rQd | _ | w w )N ) rb r! rZ r r flushr. ru r< rT r2 closerP )r7 rb rP r( r( r) r G s, zGzipFile.closec C s8 | | jtkr| j| j| | j d S d S r; )r r! rZ rb r r r )r7 zlib_moder( r( r) r Z s zGzipFile.flushc C s | j S )zInvoke the underlying file object's fileno() method. This will raise AttributeError if the underlying file object doesn't support fileno(). )rb filenorA r( r( r) r a s zGzipFile.filenoc C s" | j tkr td| jd dS )z[Return the uncompressed stream file position indicator to the beginning of the filezCan't rewind in write moder N)r! rT r r2 r= rA r( r( r) rewindi s zGzipFile.rewindc C | j tkS r; )r! rT rA r( r( r) readablep zGzipFile.readablec C r r; )r! rZ rA r( r( r) writables r zGzipFile.writablec C r? r@ r( rA r( r( r) rB v rC zGzipFile.seekablec C s | j tkrC|tjkr|tjkr| j| }ntd|| jk r"td|| j }d}t|d D ]}| | q/| d|d | jS | j t krS| | j ||S | jS )NzSeek from end not supportedzNegative seek in write modes i r} )r! rZ r SEEK_SETSEEK_CURrx r r ranger rT r r2 r= )r7 rx whencecountchunkir( r( r) r= y s" z GzipFile.seekc C s | | j|S r; )r r2 readline)r7 r< r( r( r) r s zGzipFile.readlinerk ) rD rE rF rG rP r r: propertyr rd rr r[ rc r r r r r r r\ Z_SYNC_FLUSHr r r r r rB r r r= r r( r( r( r) r y s8 Q r c sZ e Zd Z fddZdd Zdd Zdd Zdd d Zd d Zdd Z fddZ Z S )rU c s, t jt|tjtj d d| _d | _d S )N)wbitsT)superr: r/ r\ decompressobjr_ _new_memberrj )r7 fp __class__r( r) r: s z_GzipReader.__init__c C s t d| _d| _d S rs )r\ rt _crc _stream_sizerA r( r( r) _init_read s z_GzipReader._init_readc C sP | j |}t||k r&| j |t| }|s td||7 }t||k s |S )zRead exactly *n* bytes from `self._fp` This method is required because self._fp may be unbuffered, i.e. return short reads. ACompressed file ended before the end-of-stream marker was reached)_fpr r3 EOFError)r7 r r r r( r( r) _read_exact s z_GzipReader._read_exactc C s | j d}|dkr dS |dkrtd| td| d\}}| _|dkr+td|t@ r>td | d\}| | |t@ rQ | j d }|rO|d krPnqC|t @ rd | j d }|rb|d krcnqV|t @ rm| d d S ) Nr r0 Fry zNot a gzipped file (%r)z<BBIxxr zUnknown compression methodz<HTr r} ) r r r r* unpackr rj FEXTRAr FCOMMENTFHCRC)r7 magicmethodflag extra_lenrq r( r( r) _read_gzip_header s8 z _GzipReader._read_gzip_headerrk c C s |dk r| S |s dS | jjr"| d| _| jdi | j| _| jr6| | s3| j | _ dS d| _| j t j}| j||}| jjdkrS| j | jj n| jjdkra| j | jj |dkrfn |dkrntdq | | | j t|7 _ |S )Nr r0 TFr r( )readall _decompressoreof _read_eofr _decomp_factory _decomp_argsr r _pos_sizer r r r r unconsumed_tailr9 unused_datar _add_read_datar3 )r7 r< buf uncompressr( r( r) r s> %z_GzipReader.readc C s$ t || j| _| jt| | _d S r; )r\ rt r r r3 )r7 r r( r( r) r s z_GzipReader._add_read_datac C s t d| d\}}|| jkr tdt|t| jf || jd@ kr(tdd}|dkr8| jd}|dks.|rB| j | d S d S )Nz<IIr zCRC check failed %s != %sr z!Incorrect length of data producedr} r ) r* r r r r ro r r r r9 )r7 rt isizecr( r( r) r s z_GzipReader._read_eofc s t d| _d S r@ )r _rewindr rA r r( r) r s z_GzipReader._rewindr ) rD rE rF r: r r r r r r r __classcell__r( r( r r) rU s !3rU )rd c C sP t }t|d||d}|| W d | S 1 s w Y | S )zCompress data in one shot and return the compressed string. Optional argument is the compression level, in range of 0-9. wb)rb r! r" rd N)r BytesIOr r getvalue)r r" rd r r8 r( r( r) r s r c C s< t t| d }| W d S 1 sw Y dS )zYDecompress a gzip compressed string in one shot. Return the decompressed string. r N)r r r r )r r8 r( r( r) r ( s $r c C s ddl m} | dd}| }|jdddd |jd dd d |jd d dd d |jdddgdd | }t}|jr>t}n|jrCt }|j D ]{}|j r}|dkr]t ddt jjd}t jj}n@|dd dkrmt d| t|d}t|d d d}n |dkrt jj}t ddt jj|d}n t|d}t|d d} |tj}|sn|| q|t jjur| |t jjur| qFd S )Nr )ArgumentParserzeA simple command line interface for the gzip module: act like gzip, but do not delete the input file.) descriptionz--fast store_truezcompress faster)actionhelpz--bestzcompress betterz-dz --decompressz act like gunzip instead of gzipargs*-r5 )nargsdefaultmetavarr r )r r! rb rg rh z filename doesn't end in .gz: r )r r! rb r" )argparser add_mutually_exclusive_group add_argument parse_args_COMPRESS_LEVEL_TRADEOFFfastr bestr r r r sysstdinbufferstdoutexitr rO r r r r r ) r parsergroupr r" argr8 gr r( r( r) main0 sZ r __main__)!rG r* r r r r\ rO r _compression__all__FTEXTr r r r rT rZ r r r r r. r/ r r BaseStreamr DecompressReaderrU r r r rD r( r( r( r) <module> s: -* 0