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B  fe@s<dZddlZddlZddlZddlZddlZddlZddlmZ ej dkrXddl m Z ndZ ddlZddlmZmZmZmZdddhZeed reejeejd ZeZd4ddZGdddZGdddZy ejZWn(ek rGdddee ZYnXGdddej!dZ"ej"#e"Gddde"Z$ej$#e$ddl%m&Z&e$#e&Gddde"Z'ej'#e'Gddde'Z(Gd d!d!e'Z)Gd"d#d#e(Z*Gd$d%d%e(Z+Gd&d'd'e'Z,Gd(d)d)e+e*Z-Gd*d+d+e$Z&Gd,d-d-e"Z.ej.#e.Gd.d/d/ej/Z0Gd0d1d1e.Z1Gd2d3d3e1Z2dS)5z) Python implementation of the io module. N) allocate_lock>win32cygwin)setmode)__all__SEEK_SETSEEK_CURSEEK_END SEEK_HOLEi rTc Cszt|tst|}t|tttfs0td|t|tsFtd|t|ts\td||dk rzt|tsztd||dk rt|tstd|t|}|tdst|t|krt d|d|k} d |k} d |k} d |k} d |k} d |k}d|k}d|krD| s"| s"| s"| r*t dddl }| dt dd} |rX|rXt d| | | | dkrvt d| s| s| s| st d|r|dk rt d|r|dk rt d|r|dk rt dt || rdpd| rd pd| r d pd| rd pd| r,d p.d||d}|}yd}|dksd|dkrl|rld}d}|dkrt}yt|j}Wnttfk rYnX|dkr|}|dkrt d |dkr|r|St d!| rt||}n<| s | s | rt||}n| r(t||}n t d"||}|rB|St|||||}|}||_|S|YnXdS)#aOpen file and return a stream. 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The available modes are: ========= =============================================================== Character Meaning --------- --------------------------------------------------------------- 'r' open for reading (default) 'w' open for writing, truncating the file first 'x' create a new file and open it for writing 'a' open for writing, appending to the end of the file if it exists 'b' binary mode 't' text mode (default) '+' open a disk file for updating (reading and writing) 'U' universal newline mode (deprecated) ========= =============================================================== The default mode is 'rt' (open for reading text). For binary random access, the mode 'w+b' opens and truncates the file to 0 bytes, while 'r+b' opens the file without truncation. The 'x' mode implies 'w' and raises an `FileExistsError` if the file already exists. Python distinguishes between files opened in binary and text modes, even when the underlying operating system doesn't. Files opened in binary mode (appending 'b' to the mode argument) return contents as bytes objects without any decoding. In text mode (the default, or when 't' is appended to the mode argument), the contents of the file are returned as strings, the bytes having been first decoded using a platform-dependent encoding or using the specified encoding if given. 'U' mode is deprecated and will raise an exception in future versions of Python. It has no effect in Python 3. Use newline to control universal newlines mode. buffering is an optional integer used to set the buffering policy. Pass 0 to switch buffering off (only allowed in binary mode), 1 to select line buffering (only usable in text mode), and an integer > 1 to indicate the size of a fixed-size chunk buffer. When no buffering argument is given, the default buffering policy works as follows: * Binary files are buffered in fixed-size chunks; the size of the buffer is chosen using a heuristic trying to determine the underlying device's "block size" and falling back on `io.DEFAULT_BUFFER_SIZE`. On many systems, the buffer will typically be 4096 or 8192 bytes long. * "Interactive" text files (files for which isatty() returns True) use line buffering. Other text files use the policy described above for binary files. encoding is the str name of the encoding used to decode or encode the file. This should only be used in text mode. The default encoding is platform dependent, but any encoding supported by Python can be passed. See the codecs module for the list of supported encodings. errors is an optional string that specifies how encoding errors are to be handled---this argument should not be used in binary mode. Pass 'strict' to raise a ValueError exception if there is an encoding error (the default of None has the same effect), or pass 'ignore' to ignore errors. (Note that ignoring encoding errors can lead to data loss.) See the documentation for codecs.register for a list of the permitted encoding error strings. newline is a string controlling how universal newlines works (it only applies to text mode). It can be None, '', '\n', '\r', and '\r\n'. It works as follows: * On input, if newline is None, universal newlines mode is enabled. Lines in the input can end in '\n', '\r', or '\r\n', and these are translated into '\n' before being returned to the caller. If it is '', universal newline mode is enabled, but line endings are returned to the caller untranslated. If it has any of the other legal values, input lines are only terminated by the given string, and the line ending is returned to the caller untranslated. * On output, if newline is None, any '\n' characters written are translated to the system default line separator, os.linesep. If newline is '', no translation takes place. If newline is any of the other legal values, any '\n' characters written are translated to the given string. closedfd is a bool. If closefd is False, the underlying file descriptor will be kept open when the file is closed. This does not work when a file name is given and must be True in that case. The newly created file is non-inheritable. A custom opener can be used by passing a callable as *opener*. 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A buffered reader object and buffered writer object put together to form a sequential IO object that can read and write. This is typically used with a socket or two-way pipe. reader and writer are RawIOBase objects that are readable and writeable respectively. If the buffer_size is omitted it defaults to DEFAULT_BUFFER_SIZE. cCs<|std|s tdt|||_t|||_dS)zEConstructor. 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If the buffer_size is omitted it defaults to DEFAULT_BUFFER_SIZE. cCs(|t|||t|||dS)N)r_r/rr.)rCr:rr>r>r?rRszBufferedRandom.__init__rc Cs|tkrtd||jrJ|j |j|jt|jdWdQRX|j||}|j| WdQRX|dkrt d|S)Nzinvalid whence valuer rz seek() returned invalid position) rr!rZrrr:rTrr rr+)rCrUrVr>r>r?rTWs$zBufferedRandom.seekcCs|jrt|St|SdS)N)rr.rWr/)rCr>r>r?rWhs zBufferedRandom.tellNcCs|dkr|}t||S)N)rWr.rX)rCrUr>r>r?rXnszBufferedRandom.truncatecCs |dkr d}|t||S)Nr)rZr/rq)rCrlr>r>r?rqtszBufferedRandom.readcCs|t||S)N)rZr/r)rCrr>r>r?rzszBufferedRandom.readintocCs|t||S)N)rZr/rg)rCrlr>r>r?rg~szBufferedRandom.peekrcCs|t||S)N)rZr/r)rCrlr>r>r?rszBufferedRandom.read1cCs|t||S)N)rZr/r)rCrr>r>r?rszBufferedRandom.readinto1c CsF|jr:|j(|j|jt|jd|WdQRXt||S)Nr ) rrr:rTrr rr.r~)rCrr>r>r?r~s zBufferedRandom.write)r)N)N)r)r)rGrHrIrBr'rrTrWrXrqrrgrrr~r>r>r>r?r-Is      r-cseZdZdZdZdZdZdZdZdZ d0ddZ dd Z d d Z d d Z ddZd1ddZd2ddZddZddZddZefddZddZd3ddZfd d!Zd"d#Zd$d%Zd&d'Zd(d)Zd*d+Zed,d-Zed.d/Z Z!S)4r%rFNTr c CsB|jdkr*z|jrt|jWdd|_Xt|tr).0cr>r>r? sz"FileIO.__init__..r rzKMust have exactly one of create/read/write/append mode and at most one plusrTr rrO_BINARYZ O_NOINHERIT O_CLOEXECz'Cannot use closefd=False with file nameizexpected integer from openerzNegative file descriptorFr*)-_fd_closefdrr2rfloatrrr!rrsumcount_created _writableO_EXCLO_CREAT _readableO_TRUNC _appendingO_APPENDO_RDWRO_RDONLYO_WRONLYgetattrr@r+set_inheritabler(statS_ISDIRst_modeIsADirectoryErrorrZEISDIRrr,_blksizer'_setmoderrRlseekr ZESPIPE) rCr3r1r8rfdflagsZnoinherit_flagZowned_fdZfdfstatrr>r>r?rs     $                   zFileIO.__init__cCsB|jdkr>|jr>|js>ddl}|jd|ftd|d|dS)Nrzunclosed file %rr ) stacklevelsource)rrrdr"r#ResourceWarningr2)rCr"r>r>r?r\s  zFileIO.__del__cCstd|jjdS)Nzcannot serialize '%s' object)rrQrG)rCr>r>r?rszFileIO.__getstate__cCsld|jj|jjf}|jr"d|Sy |j}Wn&tk rRd||j|j|jfSXd|||j|jfSdS)Nz%s.%sz <%s [closed]>z<%s fd=%d mode=%r closefd=%r>z<%s name=%r mode=%r closefd=%r>) rQrHrIrdrRr,rr1r)rC class_namerRr>r>r?rs  zFileIO.__repr__cCs|jstddS)NzFile not open for reading)rrO)rCr>r>r?ra-szFileIO._checkReadablecCs|jstddS)NzFile not open for writing)rrO)rCr^r>r>r?rc1szFileIO._checkWritablecCsP|||dks |dkr(|Syt|j|Stk rJdSXdS)zRead at most size bytes, returned as bytes. Only makes one system call, so less data may be returned than requested In non-blocking mode, returns None if no data is available. Return an empty bytes object at EOF. Nr)rYrarrrqrr)rCrlr>r>r?rq5sz FileIO.readcCs||t}y6t|jdt}t|jj}||krH||d}Wnt k r^YnXt }xnt ||krt |}|t |t7}|t |}yt |j|}Wntk r|rPdSX|sP||7}qhWt|S)zRead all data from the file, returned as bytes. In non-blocking mode, returns as much as is immediately available, or None if no data is available. Return an empty bytes object at EOF. rr N)rYrar'rrrrr(st_sizer+rpr rrqrr)rCbufsizerUendr;rkrr>r>r?rEs4   zFileIO.readallcCs4t|d}|t|}t|}||d|<|S)zSame as RawIOBase.readinto().rN)rrrqr )rCrmrrkr>r>r?rhs  zFileIO.readintocCs8||yt|j|Stk r2dSXdS)aWrite bytes b to file, return number written. Only makes one system call, so not all of the data may be written. The number of bytes actually written is returned. In non-blocking mode, returns None if the write would block. N)rYrcrr~rr)rCrr>r>r?r~ps z FileIO.writecCs*t|trtd|t|j||S)aMove to new file position. Argument offset is a byte count. Optional argument whence defaults to SEEK_SET or 0 (offset from start of file, offset should be >= 0); other values are SEEK_CUR or 1 (move relative to current position, positive or negative), and SEEK_END or 2 (move relative to end of file, usually negative, although many platforms allow seeking beyond the end of a file). Note that not all file objects are seekable. zan integer is required)rrrrYrrr)rCrUrVr>r>r?rT~s z FileIO.seekcCs|t|jdtS)zYtell() -> int. Current file position. Can raise OSError for non seekable files.r)rYrrrr)rCr>r>r?rWsz FileIO.tellcCs2|||dkr |}t|j||S)zTruncate the file to at most size bytes. Size defaults to the current file position, as returned by tell(). The current file position is changed to the value of size. N)rYrcrWr ftruncater)rCrlr>r>r?rXs zFileIO.truncatecs.|js*z|jrt|jWdtXdS)zClose the file. 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This class provides a character and line based interface to stream I/O. There is no public constructor. rcCs|ddS)zRead at most size characters from stream, where size is an int. Read from underlying buffer until we have size characters or we hit EOF. If size is negative or omitted, read until EOF. Returns a string. rqN)rS)rCrlr>r>r?rqszTextIOBase.readcCs|ddS)z.Write string s to stream and returning an int.r~N)rS)rCsr>r>r?r~szTextIOBase.writeNcCs|ddS)z*Truncate size to pos, where pos is an int.rXN)rS)rCrUr>r>r?rXszTextIOBase.truncatecCs|ddS)z_Read until newline or EOF. Returns an empty string if EOF is hit immediately. ruN)rS)rCr>r>r?ruszTextIOBase.readlinecCs|ddS)z Separate the underlying buffer from the TextIOBase and return it. After the underlying buffer has been detached, the TextIO is in an unusable state. rN)rS)rCr>r>r?r szTextIOBase.detachcCsdS)zSubclasses should override.Nr>)rCr>r>r?r5szTextIOBase.encodingcCsdS)zLine endings translated so far. Only line endings translated during reading are considered. Subclasses should override. Nr>)rCr>r>r?newlinesszTextIOBase.newlinescCsdS)zMError setting of the decoder or encoder. Subclasses should override.Nr>)rCr>r>r?r6#szTextIOBase.errors)r)N) rGrHrIrBrqr~rXrurrr5rr6r>r>r>r?rs    rc@sTeZdZdZdddZdddZdd Zd d Zd d ZdZ dZ dZ e ddZ dS)IncrementalNewlineDecodera+Codec used when reading a file in universal newlines mode. It wraps another incremental decoder, translating \r\n and \r into \n. It also records the types of newlines encountered. When used with translate=False, it ensures that the newline sequence is returned in one piece. strictcCs,tjj||d||_||_d|_d|_dS)N)r6rF)codecsIncrementalDecoderr translatedecoderseennl pendingcr)rCrrr6r>r>r?r4s z"IncrementalNewlineDecoder.__init__FcCs|jdkr|}n|jj||d}|jr<|s.|rr>r?r;s(   "  z IncrementalNewlineDecoder.decodecCs@|jdkrd}d}n|j\}}|dK}|jr8|dO}||fS)Nrrr )rgetstater)rCrflagr>r>r?rZs z"IncrementalNewlineDecoder.getstatecCs8|\}}t|d@|_|jdk r4|j||d?fdS)Nr )boolrrsetstate)rCstaterrr>r>r?res z"IncrementalNewlineDecoder.setstatecCs$d|_d|_|jdk r |jdS)NrF)rrrreset)rCr>r>r?rks zIncrementalNewlineDecoder.resetr r cCs d|jS)N)Nrr)rrz )rz )rz )rrz )r)rCr>r>r?rusz"IncrementalNewlineDecoder.newlinesN)r)F)rGrHrIrBrrrrrrrrrrr>r>r>r?r-s   rc@sveZdZdZdZdZdOddZddZdPd d Zd d Z e d dZ e ddZ e ddZ e ddZe ddZddedddddZddZddZddZd d!Zd"d#Ze d$d%Ze d&d'Zd(d)Zd*d+Zd,d-Zd.d/Zd0d1Zd2d3ZdQd4d5Zd6d7Z d8d9Z!dRd;d<Z"d=d>Z#d?d@Z$dSdAdBZ%dCdDZ&dTdEdFZ'dUdGdHZ(dIdJZ)dVdKdLZ*e dMdNZ+dS)Wr0aCharacter and line based layer over a BufferedIOBase object, buffer. encoding gives the name of the encoding that the stream will be decoded or encoded with. It defaults to locale.getpreferredencoding(False). errors determines the strictness of encoding and decoding (see the codecs.register) and defaults to "strict". newline can be None, '', '\n', '\r', or '\r\n'. It controls the handling of line endings. If it is None, universal newlines is enabled. With this enabled, on input, the lines endings '\n', '\r', or '\r\n' are translated to '\n' before being returned to the caller. Conversely, on output, '\n' is translated to the system default line separator, os.linesep. If newline is any other of its legal values, that newline becomes the newline when the file is read and it is returned untranslated. On output, '\n' is converted to the newline. If line_buffering is True, a call to flush is implied when a call to write contains a newline character. iNFc Cs|||dkrvyt|}Wnttfk r<YnX|dkrvy ddl}Wntk rjd}Yn X|d}t |t st d|t |jsd}t|||dkrd}nt |t st d|||_d|_d|_d|_|j|_|_t|jd |_||||||dS) NrasciiFzinvalid encoding: %rzG%r is not a text encoding; use codecs.open() to handle arbitrary codecsrzinvalid errors: %rrr)_check_newlinerdevice_encodingr)r,rOlocale ImportErrorZgetpreferredencodingrrr!rlookup_is_text_encoding LookupErrorr_decoded_chars_decoded_chars_used _snapshotr=r]r_tellingrn _has_read1 _configure) rCr=r5r6r7r< write_throughr r^r>r>r?rs:           zTextIOWrapper.__init__cCs>|dk r$t|ts$tdt|f|dkr:td|fdS)Nzillegal newline type: %r)Nrrrz zillegal newline value: %r)rrrtyper!)rCr7r>r>r?r szTextIOWrapper._check_newlinecCs||_||_d|_d|_d|_| |_|dk|_||_|dk|_|pHt j |_ ||_ ||_ |jr|r|j}|dkry|dWntk rYnXdS)Ngrr) _encoding_errors_encoder_decoder _b2cratio_readuniversal_readtranslate_readnl_writetranslaterlinesep_writenl_line_buffering_write_throughrrbr=rW _get_encoderrr)rCr5r6r7r<rpositionr>r>r?rs&    zTextIOWrapper._configurecCsd|jj|jj}y |j}Wntk r2YnX|d|7}y |j}Wntk r`YnX|d|7}|d|jS)Nz<{}.{}z name={0!r}z mode={0!r}z encoding={0!r}>)rrQrHrIrRrr1r5)rCr;rRr1r>r>r?rs    zTextIOWrapper.__repr__cCs|jS)N)r)rCr>r>r?r5szTextIOWrapper.encodingcCs|jS)N)r)rCr>r>r?r6 szTextIOWrapper.errorscCs|jS)N)r#)rCr>r>r?r<szTextIOWrapper.line_bufferingcCs|jS)N)r$)rCr>r>r?rszTextIOWrapper.write_throughcCs|jS)N)r)rCr>r>r?r=szTextIOWrapper.buffer)r5r6r7r<rcCs|jdk r*|dk s"|dk s"|tk r*td|dkrH|dkrB|j}q^d}nt|ts^td||dkrn|j}nt|tstd||tkr|j}| ||dkr|j }|dkr|j }| | |||||dS)z`Reconfigure the text stream with new parameters. 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Nz no decoderg)rr!rrrr=r _CHUNK_SIZErqrr*r rrr)rC dec_buffer dec_flags input_chunkeofZ decoded_charsr>r>r? _read_chunks  zTextIOWrapper._read_chunkrcCs(||d>B|d>B|d>Bt|d>BS)N@)r)rCr&r7 bytes_to_feedneed_eof chars_to_skipr>r>r? _pack_cookieszTextIOWrapper._pack_cookiecCsFt|d\}}t|d\}}t|d\}}t|d\}}|||||fS)Nl)divmod)rCZbigintrestr&r7r?r@rAr>r>r?_unpack_cookies zTextIOWrapper._unpack_cookiec Cs:|jstd|jstd||j}|j}|dksF|jdkrX|j rTt d|S|j\}}|t |8}|j }|dkr| ||S|}zt|j|}d}x|dkr"|d|ft ||d|} | |kr|\} } | s| }|| 8}P|t | 8}d}q||8}|d}qWd}|d|f||} |} |dkrX| | | Sd}d}d}xt|t |D]t}|d7}|t ||||d7}|\}}|s||kr| |7} ||8}|dd} }}||krtPqtW|t |jddd 7}d}||krtd | | | |||S||XdS) Nz!underlying stream is not seekablez(telling position disabled by next() callzpending decoded textrr rr T)rz'can't reconstruct logical file position)rrOrr+rZr=rWrrrr3r rrBrrrrrrange)rCr&rr7Z next_inputrAZ saved_stateZ skip_bytesZ skip_backrkrd start_posZ start_flagsZ bytes_fedr@Z chars_decodedir6r>r>r?rWsv              zTextIOWrapper.tellcCs$||dkr|}|j|S)N)rZrWr=rX)rCrUr>r>r?rXA szTextIOWrapper.truncatecCs*|jdkrtd||j}d|_|S)Nzbuffer is already detached)r=r!rZr)rCr=r>r>r?rG s  zTextIOWrapper.detachc sfdd}jrtdjs(td|dkrL|dkr@tdd}}|dkr|dkrdtd jdd}d d_ j rj |||S|dkrtd |f|dkrtd |f |\}}}}} j|d d_ |dkr(j r(j n@j s<|s<| rhj pJ _ j d |f|d f_ | rj|} j | ||| f_ tj| krtd| _|||S)NcsHyjp}Wntk r&YnX|dkr<|dn|dS)z9Reset the encoder (merely useful for proper BOM handling)rN)rr%rrr)r&r,)rCr>r?_reset_encoderP s z*TextIOWrapper.seek.._reset_encoderztell on closed filez!underlying stream is not seekabler rz#can't do nonzero cur-relative seeksr z#can't do nonzero end-relative seeksrzunsupported whence (%r)znegative seek position %rrz#can't restore logical file position)rdr!rrOrWrZr=rTr*rrrrEr/rrqrr rr+r) rCZcookierVrJr&rHr7r?r@rAr8r>)rCr?rTO s\         zTextIOWrapper.seekcCs||dkrd}n4y |j}Wn"tk rBt|dYnX|}|jpV|}|dkr||j|j dd}| dd|_ |Sd}||}x4t ||kr|s| }|||t |7}qW|SdS)Nrz is not an integerrT)rrF)raror,rrr/r2rr=rqr*rr r:)rCrlrsrr;r9r>r>r?rq s*    zTextIOWrapper.readcCs(d|_|}|s$d|_|j|_t|S)NF)rrurrrw)rCrxr>r>r?ry szTextIOWrapper.__next__c Cs|jrtd|dkrd}n4y |j}Wn"tk rHt|dYnX|}|}d}|jsj|d}}xV|jr| d|}|dkr|d}Pnt |}n|j r>| d|}| d|}|dkr|dkrt |}n |d}PnP|dkr|d}Pn:||kr|d}Pn$||dkr2|d}Pn |d}Pn&| |j }|dkrd|t |j }P|dkrt ||kr|}Px| r|jrPqW|jr||7}qv|d d|_|SqvW|dkr||kr|}|t |||d|S) Nzread from closed filerz is not an integerrrr rr r)rdr!ror,rr2rr/rrir rrr:rr*rr4) rCrlrsrxstartrUendposZnlposZcrposr>r>r?ru sv            zTextIOWrapper.readlinecCs|jr|jjSdS)N)rr)rCr>r>r?r szTextIOWrapper.newlines)NNNFF)NNNFF)N)rrrr)N)r)N)N),rGrHrIrBr5rrr rrrr5r6r<rr=r'r(r]r`rbrZr2rdrRr)r&r~r%r/r*r2r4r:rBrErWrXrrTrqryrurr>r>r>r?r0sV ' #     '    * c  K  ]r0csReZdZdZdfdd ZddZdd Zed d Zed d Z ddZ Z S)StringIOzText I/O implementation using an in-memory buffer. The initial_value argument sets the value of object. The newline argument is like the one of TextIOWrapper's constructor. rrcsftt|jtdd|d|dkr(d|_|dk rbt|tsNtdt |j | || ddS)Nzutf-8 surrogatepass)r5r6r7Fz*initial_value must be str or None, not {0}r) rrMrrr rrrrrrGr~rT)rCZ initial_valuer7)rQr>r?r( s  zStringIO.__init__c CsL||jp|}|}|z|j|jddS||XdS)NT)r) rZrr/rrrr=rr)rCrZ old_stater>r>r?r8 szStringIO.getvaluecCs t|S)N)objectr)rCr>r>r?rB szStringIO.__repr__cCsdS)Nr>)rCr>r>r?r6G szStringIO.errorscCsdS)Nr>)rCr>r>r?r5K szStringIO.encodingcCs|ddS)Nr)rS)rCr>r>r?rO szStringIO.detach)rr) rGrHrIrBrrrrr6r5rrr>r>)rQr?rM! s   rM)r rNNNTN)3rBrabcrrrsys_threadrrplatformZmsvcrtrriorrrr rrnaddr SEEK_DATAr'rr@rArJrOr,r+r!ABCMetarPregisterr_ior%rrrr/r.rr-rrrr0rMr>r>r>r?st       T   =   g iCiIJY@ U$