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PngImagePlugin.cpython-310.pyc
o Z#at @ s$ d dl Z d dlZd dlZd dlZd dlZd dlZddlmZmZm Z m Z m Z ddl m Z ddl mZ ddl mZ ddl mZ ddl mZ eeZed jZd Z d d d dddddddddddddZ edZ e j Z d e Z! d Z" dZ# d Z$ d Z% dZ& d d Z'dNd d!Z(G d"d# d#Z)G d$d% d%e*Z+G d&d' d'Z,G d(d) d)e)Z-d*d+ Z.G d,d- d-e j Z/d.d/d0d1d2d3d4d4d5d6d7d8d9d:d;Z0d<d= Z1G d>d? d?Z2G d@dA dAZ3dBdC Z4dDdE Z5e1dFfdGdHZ6dIdJ Z7e8e/j9e/e. e:e/j9e6 e;e/j9e5 e<e/j9dKdLg e=e/j9dM dS )O N )Image ImageChops ImageFile ImagePalette ImageSequence)i16be)i32be)o8)o16be)o32bes \w\w\w\ws PNG )1r )LL;2)r L;4)r r )II;16B)RGBr )r zRGB;16B)PP;1)r P;2)r P;4)r r )LAr )RGBAzLA;16B)r r )r zRGBA;16B))r r ) r ) r ) r ) r )r r )r r )r )r r )r r )r r )r r )r r )r )r r s ^* *$@ r c C s& t }|| t}|jrtd|S )NzDecompressed Data Too Large)zlib decompressobj decompressMAX_TEXT_CHUNKunconsumed_tail ValueError)sdobj plaintext r* 4/usr/lib/python3/dist-packages/PIL/PngImagePlugin.py_safe_zlib_decompress s r, c C s t | |d@ S )Nl )r! crc32)dataseedr* r* r+ _crc32 r0 c @ s^ e Zd Zdd Zdd Zdd Zdd Zd d Zd d Zd d Z dd Z dd Z dddZ dS ) ChunkStreamc C s || _ g | _d S N)fpqueueselfr4 r* r* r+ __init__ s zChunkStream.__init__c C s~ d}| j r| j \}}}| j| n| jd}|dd }| j }t|}t|s:tj s:t dt | d|||fS )z.Fetch a new chunk. Returns header information.Nr r zbroken PNG file (chunk )) r5 popr4 seekreadtelli32is_cidr LOAD_TRUNCATED_IMAGES SyntaxErrorrepr)r7 cidposlengthr' r* r* r+ r< s zChunkStream.readc C s | S r3 r* r7 r* r* r+ __enter__ zChunkStream.__enter__c G s | d S r3 )close)r7 argsr* r* r+ __exit__ s zChunkStream.__exit__c C s d | _ | _| _d S r3 )r5 crcr4 rF r* r* r+ rI s zChunkStream.closec C s | j |||f d S r3 )r5 appendr7 rC rD rE r* r* r+ push s zChunkStream.pushc C s* t d||| t| d|d ||S )z"Call the appropriate chunk handlerzSTREAM %r %s %schunk_ascii)loggerdebuggetattrdecoderN r* r* r+ call s zChunkStream.callc C s t jr|d d? d@ r| || dS z t|t|}t| jd}||kr1tdt| dW dS t j yK } z tdt| d|d}~ww ) zRead and verify checksumr r Nr z(broken PNG file (bad header checksum in r9 z(broken PNG file (incomplete checksum in ) r r@ crc_skipr0 r> r4 r< rA rB structerror)r7 rC r. crc1crc2er* r* r+ rL s& zChunkStream.crcc C s | j d dS )z3Read checksum. Used if the C module is not presentr N)r4 r< )r7 rC r. r* r* r+ rX s zChunkStream.crc_skip IENDc C sn g } z | \}}}W n tjy } ztd|d }~ww ||kr& |S | |t| j| || q)NTztruncated PNG file) r< rY rZ OSErrorrL r _safe_readr4 rM )r7 endchunkcidsrC rD rE r] r* r* r+ verify s zChunkStream.verifyN)r^ ) __name__ __module__ __qualname__r8 r< rG rK rI rO rV rL rX rc r* r* r* r+ r2 s r2 c @ s e Zd ZdZedddZdS )iTXtzq Subclass of string to allow iTXt chunks to look like strings while keeping their extra information Nc C s t | |}||_||_|S )z :param cls: the class to use when creating the instance :param text: value for this key :param lang: language code :param tkey: UTF-8 version of the key name )str__new__langtkey)clstextrj rk r7 r* r* r+ ri s z iTXt.__new__)NN)rd re rf __doc__ staticmethodri r* r* r* r+ rg s rg c @ s6 e Zd ZdZdd Zd ddZddd Zd d d Zd S )PngInfoz< PNG chunk container (for use with save(pnginfo=)) c C s g | _ d S r3 )chunksrF r* r* r+ r8 s zPngInfo.__init__Fc C s* ||g}|r | d | j t| dS )a" Appends an arbitrary chunk. Use with caution. :param cid: a byte string, 4 bytes long. :param data: a byte string of the encoded data :param after_idat: for use with private chunks. Whether the chunk should be written after IDAT TN)rM rq tuple)r7 rC r. after_idatchunkr* r* r+ add s z PngInfo.add c C s t |ts |dd}t |ts|dd}t |ts!|dd}t |ts,|dd}|rE| d|d | d | d t| dS | d|d | d | d | dS ) zAppends an iTXt chunk. :param key: latin-1 encodable text key name :param value: value for this key :param lang: language code :param tkey: UTF-8 version of the key name :param zip: compression flag latin-1strictutf-8 iTXts s N) isinstancebytesencoderu r! compress)r7 keyvaluerj rk zipr* r* r+ add_itxt s (zPngInfo.add_itxtc C s t |tr| j|||j|j|dS t |ts0z|dd}W n ty/ | j|||d Y S w t |ts;|dd}|rL| d|d t | dS | d|d | dS ) zAppends a text chunk. :param key: latin-1 encodable text key name :param value: value for this key, text or an :py:class:`PIL.PngImagePlugin.iTXt` instance :param zip: compression flag )r rw rx zTXt tEXtr{ N) r| rg r rj rk r} r~ UnicodeErrorru r! r )r7 r r r r* r* r+ add_text7 s zPngInfo.add_textNF)rv rv F)rd re rf rn r8 ru r r r* r* r* r+ rp s rp c s e Zd Z fddZdd Zdd Zdd Zd d Zd d Zd d Z dd Z dd Z dd Z dd Z dd Zdd Zdd Zd d Zd d Zd!d" Zd#d$ Zd%d& Zd'd( Zd)d* Z ZS )+ PngStreamc sR t | i | _i | _d| _d | _d | _d | _d | _d | _ d | _ d | _ d| _ d S )Nr r r ) superr8 im_infoim_textim_sizeim_modeim_tile im_paletteim_custom_mimetype im_n_frames_seq_num rewind_state text_memoryr6 __class__r* r+ r8 X s zPngStream.__init__c C s. | j |7 _ | j tkrtd| j dd S )Nz%Too much memory used in text chunks: z>MAX_TEXT_MEMORY)r MAX_TEXT_MEMORYr& )r7 chunklenr* r* r+ check_text_memoryi s zPngStream.check_text_memoryc C s | j | j| jd| _d S )N)infotileseq_num)r copyr r r rF r* r* r+ save_rewindq s zPngStream.save_rewindc C s( | j d | _| j d | _| j d | _d S )Nr r r )r r r r rF r* r* r+ rewindx s zPngStream.rewindc C s t | j|}|d}td|d | td|| || }|dkr.td| dz t||d d }W n tyJ t j rGd }n Y n t j yU d }Y nw || j d< |S ) Nr{ ziCCP profile name %rzCompression method %sr Unknown compression method z in iCCP chunkr icc_profile) r r` r4 findrR rS rA r, r& r@ r! rZ r )r7 rD rE r' i comp_methodr r* r* r+ chunk_iCCP} s& zPngStream.chunk_iCCPc C s~ t | j|}t|dt|df| _zt|d |d f \| _| _W n ty+ Y nw |d r5d| j d< |d r=t d |S ) Nr r r r interlace zunknown filter category) r r` r4 r> r _MODESr im_rawmode Exceptionr rA r7 rD rE r' r* r* r+ chunk_IHDR s zPngStream.chunk_IHDRc C s\ d| j v rd| j d || jfg}n| jd urd| j d< dd| j || jfg}|| _|| _t)Nbboxr T default_imager )r r r r r im_idatEOFError)r7 rD rE r r* r* r+ chunk_IDAT s zPngStream.chunk_IDATc C s t r3 )r )r7 rD rE r* r* r+ chunk_IEND zPngStream.chunk_IENDc C s& t | j|}| jdkrd|f| _|S )Nr r )r r` r4 r r r r* r* r+ chunk_PLTE s zPngStream.chunk_PLTEc C s t | j|}| jdkr(t|r!|d}|dkr || jd< |S || jd< |S | jdv r6t|| jd< |S | jdkrKt|t|dt|df| jd< |S ) Nr r{ r transparencyr r r r r r ) r r` r4 r _simple_palettematchr r i16)r7 rD rE r' r r* r* r+ chunk_tRNS s zPngStream.chunk_tRNSc C s$ t | j|}t|d | jd< |S )N j@gammar r` r4 r> r r r* r* r+ chunk_gAMA s zPngStream.chunk_gAMAc C sB t | j|}tdt|d |}tdd |D | jd< |S )Nz>%dIr c s s | ]}|d V qdS )r Nr* ).0eltr* r* r+ <genexpr> s z'PngStream.chunk_cHRM.<locals>.<genexpr> chromaticity)r r` r4 rY unpacklenrr r )r7 rD rE r' raw_valsr* r* r+ chunk_cHRM s zPngStream.chunk_cHRMc C s t | j|}|d | jd< |S )Nr srgbr r` r4 r r r* r* r+ chunk_sRGB s zPngStream.chunk_sRGBc C sl t | j|}t|dt|d}}|d }|dkr)|d |d f}|| jd< |S |dkr4||f| jd< |S )Nr r r r F%u?dpiaspectr )r7 rD rE r' pxpyunitr r* r* r+ chunk_pHYs s zPngStream.chunk_pHYsc C s t | j|}z |dd\}}W n ty |}d}Y nw |rD|dd}|dd}|dkr3|n|| j|< || j|< | t | |S )Nr{ r rw rx replaceexif) r r` r4 splitr& rU r r r r )r7 rD rE r' kvv_strr* r* r+ chunk_tEXt s zPngStream.chunk_tEXtc C s t | j|}z |dd\}}W n ty |}d}Y nw |r&|d }nd}|dkr4td| dz t|dd }W n tyN t jrKd}n Y n tj yY d}Y nw |ry| dd}| dd }| | j |< | j |< | t| |S ) Nr{ r r r r z in zTXt chunkrw rx r )r r` r4 r r& rA r, r@ r! rZ rU r r r r )r7 rD rE r' r r r r* r* r+ chunk_zTXt s8 zPngStream.chunk_zTXtc C sl t | j| }}z |dd\}}W n ty | Y S w t|dk r'|S |d |d |dd }}}z |dd\}} } W n tyM | Y S w |dkry|dkrwzt| } W n tyk t jrj| Y S tj yv | Y S w |S z| dd}| dd}| dd} | dd} W n t y | Y S w t | || | j |< | j|< | t| |S )Nr{ r r r rw rx ry )r r` r4 r r& r r, r@ r! rZ rU r rg r r r ) r7 rD rE rr' r cfcmrj tkr r* r* r+ chunk_iTXt3 sJ zPngStream.chunk_iTXtc C s t | j|}d| | jd< |S )N Exif r r r r* r* r+ chunk_eXIf\ s zPngStream.chunk_eXIfc C sr t | j|}| jd urd | _td |S t|}|dks"|dkr)td |S || _t|d| jd< d| _|S )Nz4Invalid APNG, will use default PNG image if possibler l r loopz image/apng) r r` r4 r warningswarnr> r r )r7 rD rE r' n_framesr* r* r+ chunk_acTLb s zPngStream.chunk_acTLc C s t | j|}t|}| jd u r|dks | jd ur$| j|d kr$td|| _t|dt|d}}t|dt|d}}| j\} } || | ksN|| | krRtd|||| || f| jd < t|d t|d } } | dkrpd } t | t | d | jd< |d | jd< |d | jd< |S )Nr r #APNG contains frame sequence errorsr r r r z APNG contains invalid framesr d duration disposal blend) r r` r4 r> r rA r r r float) r7 rD rE r' seqwidthheightr r im_wim_h delay_num delay_denr* r* r+ chunk_fcTLq s& zPngStream.chunk_fcTLc C sF t | jd}t|}| j|d krtd|| _| |d |d S )Nr r r )r r` r4 r> r rA r )r7 rD rE r' r r* r* r+ chunk_fdAT s zPngStream.chunk_fdAT)rd re rf r8 r r r r r r r r r r r r r r r r r r r r __classcell__r* r* r r+ r W s, ")r c C s | d d t kS )Nr )_MAGIC)prefixr* r* r+ _accept r1 r c s e Zd ZdZdZdd Zedd Zdd Zd d Z d d d Z dd Z dd Z dd Z dd Zdd Z fddZdd Zd d Z ZS ) PngImageFilePNGzPortable network graphicsc C s t | jds td| j| _d| _g | _t| j| _ | j \}}}z | j |||}W n0 t y8 Y n0 t y_ t d||| t| j|}|dd r]| j||f Y nw | j|| q | jj| _| jj| _| jj| _d | _| jj| _| jj | _ | jj pd| _ | j dd | _!| jj"r| jj"\}}t#$||| _%|d kr|d | _&n|| _&| jj d urd | _'| j( | j&| _)| j* | _+| j!r| j d7 _ | ,d | j dk| _-d S ) Nr znot a PNG filer T%r %s %s (unknown)r r r F fdATr ).r r4 r< rA _PngImageFile__fp_PngImageFile__frameprivate_chunksr pngrV r AttributeErrorrR rS r r` islowerrM rL r moder _sizer r _textr r r custom_mimetyper r getr r r rawpalette_PngImageFile__prepare_idat!_close_exclusive_fp_after_loadingr _PngImageFile__rewind_idatr= _PngImageFile__rewind_seek is_animated)r7 rC rD rE r' rawmoder. r* r* r+ _open sX zPngImageFile._openc C sD | j d u r | jr| j}| | jd | | jr | | | j S )Nr )r r r r; r load)r7 framer* r* r+ rm s zPngImageFile.textc C sZ | j du r td| j | jd d d | j | j | jr(| j d| _ dS )zVerify PNG fileNz)verify must be called directly after openr r r )r4 RuntimeErrorr; r r rc rI _exclusive_fprF r* r* r+ rc s zPngImageFile.verifyc C s | |sd S || jk r| dd | j}t| jd |d D ] }z| | W q ty> } z | | td|d }~ww d S )Nr Tr zno more images in APNG file) _seek_checkr r ranger r; )r7 r last_framefr] r* r* r+ r; s zPngImageFile.seekFc C s |dkrT|r-| j | j | j | j| _d | _| jr d | _| jj | _ | jj | _ | j | _ d | _d | _| j dd| _| j d| _| j d| _| j d| _d| _n|| jd krbtd| | | jrr| j| j| j | j | _| j | _ | jrt| j | j d| _d} | j d z | j \}}}W n t j t fy Y n`w |d krt d |d kr|rt dd }z | j!||| W n? t"y Y n8 t y |dkr|d 8 }|r|| _Y n#t| j | Y n t#y t$%d||| t| j | Y nw q|| _| jj | _ | j d| _| j d| _| j d| _| j s,t | jd u r;| jt&kr;t'| _| jt&krR| j | _| (| j| j| _d S | jt'krmt)j*+| j,| j-| _| (| j| j| _d S d | _d S )Nr r Fr r r r zcannot seek to frame Tr r^ zNo more images in APNG file fcTLzAPNG missing frame datar r ).r r; r r r r r impyaccessr r r r r4 _prev_imdisposer r dispose_opblend_opdispose_extentr r& r paster r r` r< rY rZ rA r rV UnicodeDecodeErrorr rR rS APNG_DISPOSE_OP_PREVIOUSAPNG_DISPOSE_OP_BACKGROUND_cropr corefillr size)r7 r r frame_startrC rD rE r* r* r+ r s zPngImageFile._seekc C s | j S r3 )r rF r* r* r+ r= l s zPngImageFile.tellc C s0 | j dr | jd | _| j| _tj| dS )z"internal: prepare to read PNG filer )r N)r r decoderconfigr _PngImageFile__idatr load_preparerF r* r* r+ r7 o s zPngImageFile.load_preparec C s | j dkrG| jd | j \}}}|dvr!| j||| dS |dkr?z | j||| W n ty8 Y nw |d | _ n|| _ | j dks|dkrO| j }nt|| j }| j | | _ | j|S )z internal: read more image datar r ) IDATs DDATr r r )r6 r4 r< r rO rV r min)r7 read_bytesrC rD rE r* r* r+ load_readx s( zPngImageFile.load_readc C s | j dkr | j| j | jd z | j \}}}W n tjtfy) Y nmw |dkr/ng|dkrB| jrBd| _| j ||| nTz | j ||| W nH t yU Y nA t yl |dkrc|d8 }t | j| Y n) ty td||| t | j|}|dd r| j||df Y nw q | jj| _| js| j d | _d S | jr| jtkr| | j | j }| j || j | d | j| _ | j rd | _ d S d S d S d S ) z%internal: finished reading image datar Tr r^ r$ r r r r Nr )!r6 r4 r< r rY rZ rA r r rO rV r- r r r` r rR rS r r rM r r rI r' r* APNG_BLEND_OP_OVERr0 r% r+ r, convertr& )r7 rC rD rE r' updatedr* r* r+ load_end sZ zPngImageFile.load_endc C s6 d| j vr | d| j vrd| j vrd S | S )Nr zRaw profile type exif)r r getexif_get_merged_dictrF r* r* r+ _getexif s zPngImageFile._getexifc s d| j vr | t S )Nr )r r r r@ rF r r* r+ r@ s zPngImageFile.getexifc C s d| j v r | | j d S i S )z Returns a dictionary containing the XMP tags. Requires defusedxml to be installed. :returns: XMP tags in a dictionary. zXML:com.adobe.xmp)r _getxmprF r* r* r+ getxmp s zPngImageFile.getxmpc C sP z#z | j | jkr | j W n ty Y nw W d | _ d S W d | _ d S d | _ w r3 )r r4 rI r rF r* r* r+ _close__fp s zPngImageFile._close__fpr )rd re rf formatformat_descriptionr propertyrm rc r; r r= r7 r; r? rB r@ rD rE r r* r* r r+ r s" D Z !/ r )r )L;1rI )r s )r s )r s )r s )r s )r s )r s )r r )r s )r s )r s )r rJ r r r r r zI;16r r r r r r c G sJ d |}| tt|| | | t|t|}| t| dS )z'Write a PNG chunk (including CRC field)r N)joinwriteo32r r0 r4 rC r. rL r* r* r+ putchunk s rO c @ e Zd Zdd Zdd ZdS )_idatc C s || _ || _d S r3 )r4 rt )r7 r4 rt r* r* r+ r8 s z_idat.__init__c C s | | jd| d S )Nr8 )rt r4 r7 r. r* r* r+ rL z _idat.writeNrd re rf r8 rL r* r* r* r+ rQ s rQ c @ rP )_fdatc C s || _ || _|| _d S r3 )r4 rt r )r7 r4 rt r r* r* r+ r8 s z_fdat.__init__c C s* | | jdt| j| | jd7 _d S )Nr r )rt r4 rM r rR r* r* r+ rL s z _fdat.writeNrT r* r* r* r+ rU s rU c C s. | j d| jd}| j d| jdd}| j d| jdd}| j d| jdt}| j d| jdt}|rHt| j dg } n t| g| j dg } g } d} | D ]} t| D ]} | } | j | j kr| j dkr|| j | j | j d } n| | j } | j }t |ttfr|| |d< t |ttfr|| |d< t |ttfr|| |d< | d 7 } | rE| d }|d d}|d d}|tkrt| d k rt}|tkr|d }tjd| jd}|d }|r||}nd| j }||| n|tkr| d d }n|d }t| d| d}| }|sD||dkrD||dkrDt |ttfrC|d d |d 7 < qand }| | ||d qaqZ||dt t| t | |rtt | t ||dd| j d|fg d}t!| D ]\}}|d } |d sd| j }n |d }| |} | j}|d }t"t#|d|}|d|}|d|} ||dt |t |d t |d t |d t |d t$|t$dt%|t%| |d 7 }|dkr|st | t ||dd| j d|fg qzt&|||} t | | dd| j d|fg | j'}qzd S )Nr r r r r r append_imagesr )r r encoderinfor r% r )r r r r r r r )r% r rX s acTLr r$ r )(rX r r APNG_DISPOSE_OP_NONEAPNG_BLEND_OP_SOURCE itertoolschainr Iteratorr r r= r r| listrr r. r r/ r r1 r2 r3 cropr, r subtract_modulogetbboxrM rM r _saverQ enumerateintroundo16r rU r ) r% r4 rt r r r r r r r] im_frames frame_countim_seqim_framerX previous prev_disposal prev_blendbase_imr( r deltar r frame_datar3 frame_durationframe_disposal frame_blend fdat_chunksr* r* r+ _write_multiple_frames$ s 5 $ rv c C s t | ||dd d S )NT)save_all)rc )r% r4 filenamer* r* r+ _save_all rS ry Fc C sh | j }|dkrId| jv rtd| jd > d}n| jr,ttt| j d d dd}nd}|dkrI|dkr9d}n |dkr@d}nd}| d | }| jd d | jd d | jdd | jddf| _zt | \}}W n t y } z t d| d| d } ~ ww | t ||dt| jd t| jd |ddd g d} | jd| jd} | rd} | d t| } ||d| | d | jd }|rg d }|jD ]=}|d d \}} || v r| | |||| q||v r|||| q|dd r|dd }|s|||| q| j dkr=|d }| jd d | }t||k r7|d7 }t||k s,||d | | jd | jd d }|sQ|dkr| j dkr|}t|trj||d!|d | nxtdtd"|}d#| d }||d!|d | n_| j d$v rtdtd%|}||d!t| nH| j d kr|\}}}||d!t|t| t| n,d | jv rt d&n!| j dkr| j d'kr| jd'd(}|}||d!|d | | jd)}|r||d*tt |d d+ d, tt |d d+ d, d- |r-d.d/g} |jD ]}|d d \}} || v r+| | |||| q| jd0| jd0} | rYt| t j rG| d1} | d2rS| d3d } ||d4| |rdt!| ||| nt"#| t$||d5d6| j d|fg |r|jD ]#}|d d \}} |dd r|dd }|r|||| q|||d7d t%|d8r|& d S d S )9Nr bitsr r r r r ;optimizeFcompress_levelrW compress_type dictionaryr zcannot write mode z as PNGs IHDRr r{ )s cHRMs gAMAs sBIT sRGBs tIMEr s ICC Profiler s iCCPr pnginfo)s sPLTrz r r r s PLTEr s tRNS r i z%cannot use transparency for this moder Ar s pHYsr g ? s bKGDs hISTr r r r s eXIfr r r^ flush)'r rX r9 r maxr getdatar encoderconfig _OUTMODESKeyErrorr_ rL r rM r3 r r! r removerq r r% getpaletter| r} rg getpalettemodere r Exiftobytes startswithrv r rc rQ hasattrr ) r% r4 rx rt rw r colorsrz r r] rq iccnamer. r chunks_multiple_allowed info_chunkrC rs palette_byte_number palette_bytesr alpha_bytesalpharedgreenbluer r r* r* r+ rc s $ " $ rc c K sD G dd d}dd }| }z|| _ t| |d| W | ` |jS | ` w )z4Return a list of PNG chunks representing this image.c @ s e Zd Zg Zdd Zdd ZdS )z getchunks.<locals>.collectorc S s d S r3 r* rR r* r* r+ rL _ rH z"getchunks.<locals>.collector.writec S s | j | d S r3 )r. rM )r7 rt r* r* r+ rM b r1 z#getchunks.<locals>.collector.appendN)rd re rf r. rL rM r* r* r* r+ collector\ s r c W s0 d |}tt|t|}| |||f d S )Nr )rK rM r0 rM rN r* r* r+ rM e s zgetchunks.<locals>.appendN)rX rc r. )r% paramsr rM r4 r* r* r+ getchunksY s r z.pngz.apngz image/png)r )>r\ loggingrerY r r! rv r r r r r _binaryr r r r> r r rg r rM getLoggerrd rR compiler r? r r r SAFEBLOCKr$ r rZ r/ r. r[ r< r, r0 r2 rh rg rp r r r r rO rQ rU rv ry rc r register_openrF register_saveregister_save_allregister_extensions register_mimer* r* r* r+ <module> s ! \T ? 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