j/2ddlZddlmZddlmZddlmZmZmZm Z m Z m Z ddl m Z ejeZdZde d efd Zde d efd Zde d efd Zde d efd Zded efdZde d efdZddeeded efdZdS)N)BytesIO)IO) WHITESPACESWHITESPACES_AS_BYTESBinaryStreamType StreamTypelogger_warningread_non_whitespace) PdfReadErrori streamreturnct|}||dz }|dd|dddko|dddkp|ddtvS)NrEI)r readseekr)r ei_toks j/var/www/finuniver-perm.ru/html/portfolio/venv/lib/python3.11/site-packages/pypdf/generic/_image_inline.py_check_end_image_markerr1sn  ( (F fkk!nnF KKA "1":  UF1Q3K3$6$T&1+:TUrct} t||tz}|st d|d}|dkr;||d|dzz }|t| |zdzdn|d}|dkr|t| |zdz d|d}|tvr9|dd|d}|dz}|tv9||d|z }nLt|d kr||z }t d||ddz }|ddt|st d t|S) z` Extract HexEncoded stream from inline image. The stream will be moved onto the EI. TUnexpected end of stream>rNrrrEI stream not found) bytearrayr r BUFFER_SIZEr findrlenrrbytes)r data_out data_bufferedpos_tokpos_eics r extract_inline__ascii_hex_decoder)8s {{H+F33fkk+6N6NN  ;9:: :$$T** a<<  m! m4 4H KK]+++g591 = = = ##E** Q;; KK]+++f4q8! < < < AA{"" B"""KKNN! {""  gvg. .H  }   " "  %H9:: :M#2#&& B14 #6 * *20111 ??rc2t} t||tz}|st d|d}|dkr;||d|dzz }|t| |zdzdnKt|dkr||z }t d||ddz }|ddt|st d t|S) zY Extract A85 stream from inline image. The stream will be moved onto the EI. Trs~>rNrrrr) rr rr r r!rr"rr#)r r$r%r&s rextract_inline__ascii85_decoder+^s2 {{H+F33fkk+6N6NN  ;9:: :$$U++ a<<  m! m4 4H KK]+++g591 = = =  }   " "  %H9:: :M RC    B" #6 * *20111 ??rct} |t}|std|d}|dkr||dz|dz}|ds|dr;||d|dzz }|t| |zdzdngtd t|d}|dkr7||d|z }|t| |zdz dn||z }*t|std t|S) zj Extract RL (RunLengthDecode) stream from inline image. The stream will be moved onto the EI. TrrrrNz=Early EOD in RunLengthDecode of inline image, using fallback.r) rrr r r! startswithendswithrr"r __name__rr#)r r$r%r& after_token ei_markers r!extract_inline__run_length_decoder4{s {{H" K00  ;9:: :$$W-- a<<(! gk(ABK%%e,, H 0D0DU0K0K HM-GaK-88 S///'9A=qAAAA^`hiii)..u55 q== k k ::HKK]!3!3 3i ?! CQGGG M!3"6 #6 * *20111 ??rcdtdtffd }t}d} |d}|s|dkr||z }|dkr d}|d}||z }|dkrddnG|d krn@|d krn:|d vr5|d }||z }|d dz|dz}|||d z z }t st dt|S)z` Extract DCT (JPEG) stream from inline image. The stream will be moved onto the EI. lengthrcz|}|t||krtd|S)Nr)rr"r )r6_resultr s rrz(extract_inline__dct_decode..reads?++f%% ?c'llf449:: :rFTrs&rrr)intr#rrrr )r rr$ not_firstr(szs` rextract_inline__dct_decoderAsT SU{{HI% DGG  g MH <<  DGGA  << KKA     '\\  '\\   T  QA MH1ad"B R!V $H/%2 #6 * *20111 ??rct} |t}|std|d}|dkr||n||d|dz|dz }||dzt|z d|}|d}|dkr||d|d}|tvr||d;|tvr|d}|tv||dz |tvr|dvr||dt|r||d||dz d| |n| S) zLegacy method, used by defaultTrEr:rrI>rCQ) rrr r r!writetellrr"ris_followed_by_binary_datatruncategetvalue)r stream_outr%r' sav_pos_ei saved_postok2tok3s rextract_inline_defaultrPsJ+ K00  ;9:: :##    R<<   ] + + + +   ]1vz>: ; ; ;#**Q.J KK S%7%77 ; ; ; I;;q>>Dt|| Iq)));;q>>D;&& Iq)))+%%{{1~~+%%VaZ&01DDVJJ Iq))))&11  Iq))) KK A q ) ) )    + + + W+Z     r r6c|}||}|||sdSd}d}t|D].\}}|dkr |tvrdS|tv}||s|}||r|}n/|dS||}||z } |||} | dr| dkrdS| ddrdS| d krdSdS) a Check if the next bytes of the stream look like binary image data or regular page content. This is just some heuristics due to the PDF specification being too imprecise about inline images containing the `EI` marker which would end an image. Starting with PDF 2.0, we finally get a mandatory length field, but with (proper) PDF 2.0 support being very limited everywhere, we should not expect to be able to remove such hacks in the near future - especially considering legacy documents as well. The actual implementation draws some inspiration from https://github.com/itext/itext-java/blob/9.1.0/kernel/src/main/java/com/itextpdf/kernel/pdf/canvas/parser/util/InlineImageParsingUtils.java FN T/r.rr)rGrr enumeraterr/replaceisdigit) r r6positiondataoperator_start operator_endindexbyte is_whitespaceoperator_lengthoperators rrHrHsH{{}}H ;;v  D KK uNL    t "99%99944 44  !- !"N  %- %!L Eu "^3ON</0H4  _q%8%8uc""**,,ut 5r)rQ)loggingiortypingr_utilsrrrr r r errorsr getLoggerr1loggerr boolrr#r)r+r4rArPr>rHrrrks8"!!!!!  8 $ $ VJV4VVVV#Z#E####L:%:$j$U$$$$N,'7,E,,,,^1!:1!%1!1!1!1!h66r%y6#6t666666r