diff options
author | Norbert Preining <norbert@preining.info> | 2019-09-02 13:46:59 +0900 |
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committer | Norbert Preining <norbert@preining.info> | 2019-09-02 13:46:59 +0900 |
commit | e0c6872cf40896c7be36b11dcc744620f10adf1d (patch) | |
tree | 60335e10d2f4354b0674ec22d7b53f0f8abee672 /support/pstools/cep/uncep.awk |
Initial commit
Diffstat (limited to 'support/pstools/cep/uncep.awk')
-rw-r--r-- | support/pstools/cep/uncep.awk | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/support/pstools/cep/uncep.awk b/support/pstools/cep/uncep.awk new file mode 100644 index 0000000000..c9f79995ed --- /dev/null +++ b/support/pstools/cep/uncep.awk @@ -0,0 +1,140 @@ +# This file belongs to the CEP package | Ten plik nale/zy do pakietu CEP +# This package is public domain | Pakiet stanowi dobro powszechne +# For more info see `0CEP_LIC.ENG' | Wi/ecej informacji w ,,0CEP_LIC.POL'' +# =========================================================================== +# E: "CEP filtered EPS" --> "EPS" converter +# input - input file name +# OUTF - output file name +# TMPSX - temporary PostScript file name +# +# P: Konwerter "CEP filtered EPS" --> "EPS" +# wej/scie - nazwa pliku konwertowanego +# OUTF - nazwa pliku wyj/sciowego +# TMPSX - nazwa tymczasowego pliku PostScriptowego + +BEGIN {# preparing temporary files | przygotowywanie plik/ow tymczasowych + ver_no=1.03 + gs_abort="2 2 .quit" + chop_EOD=1 + if (TMPSX=="") TMPSX="tmp.psx" + flag="begin" +} + + # check carefully whether the file to be processed was created by CEP + # sprawd/xmy staranne czy mamy do czynienia z plikiem stworzonym przez CEP-a + +{l=$0 "\n"} # l is a candidate for a prolog line +flag~"begin" && /^%%Creator: CEP/ {flag="cep"; l=""} # ignore CEP comment +flag~"cep" && /^%UNCEPInfo:/ && NF==5 { + # store CEP data, ignore CEP comment + pre_lines=0+$2; buff_num=0+$3; buff_len=0+$4; pos_lines=0+$5 + flag="uncep"; l="" +} +flag~"uncep" && /^\/_fltrd_file currentfile .+ \/_read_string .+ def$/ { + # store CEP decoding scheme, ignore CEP line + decodeline=$0; flag="good"; l="" +} +{prolog=prolog l} # lengthen prolog +flag!~"uncep|good" && /^[^%]/ {exit} # emergency exit (CEP comment not found + # in DSC comment block) +flag~"uncep|good" && NR==pre_lines {exit} # exit after prolog + +END { + # error handling | obs/luga b/l/ed/ow + if (flag!~"good") errmessage("not a CEP file",1) + if (!is_A85() && !is_HEX()) + errmessage("CEP file was modified (strange coding), can't uncompress",4) + printf "UNCEP ver. " ver_no ", decoding:" + if (is_A85()) printf " A85" + if (is_HEX()) printf " Hex" + if (is_LZW()) printf ", LZW" + if (is_RLE()) printf ", RLE" + if (is_ZIP()) printf ", Flate" + print "" + + # restore preamble of EPS file + # odtworzenie preambu/ly pliku EPS + + if (gsub(/_fltrd_file/,"currentfile",prolog)==0) + errmessage("CEP file was modified, can't uncompress",4) + if (gsub(/_read_string/,"readhexstring",prolog)==0) + errmessage("CEP file was modified, can't uncompress",4) + gsub(/%/,"%%",prolog) # neutralizing printf | podmiana dla printf + + # WRITE PostScript ENCODING PROGRAM | TWORZENIE PROGRAMU Postscript-owego + out_ps("(" ps_fname(OUTF) ") (w) file /w_file exch def") + out_ps("(" ps_fname(FILENAME) ") (r) file /r_file exch def") + out_ps("/l_string 255 string def") + out_ps("/p_string 4096 string def") + out_ps("/b_string " buff_len " string def") + out_ps("/flushclose {dup flushfile closefile} def") + # copy preamble | przepisywanie preambu/ly + out_ps(pre_lines " {r_file l_string readline pop pop} repeat") + out_ps(pre_lines-3 " {currentfile l_string readline pop") + out_ps("w_file exch writestring w_file (\\n) writestring} repeat") + out_ps_block(prolog) + out_ps("%--- PROLOG END | KONIEC PROLOGU") + # prepare decoding | przygotowywanie filtr/ow dekoduj/acych + if (is_A85()) out_ps("r_file /ASCII85Decode filter") + if (is_HEX()) out_ps("r_file /ASCIIHexDecode filter") + if (is_LZW()) out_ps("dup /LZWDecode filter") + if (is_RLE()) out_ps("dup /RunLengthDecode filter") + if (is_ZIP()) out_ps("dup /FlateDecode filter") + out_ps("/d_file exch def") + if (chop_EOD) {# remove EOD mark + out_ps("{not {dup length 1 sub 0 exch getinterval} if") + out_ps(" w_file exch writestring p_string}") + } else out_ps("w_file") + out_ps("/ASCIIHexEncode filter") + # loop decoding the EPS file | p/etla dekoduj/aca plik EPS + out_ps(buff_num " {dup d_file b_string") + out_ps(" readstring pop writestring} repeat") + out_ps("flushclose d_file closefile") + if (is_LZW() || is_RLE() || is_ZIP()) out_ps("closefile") + # copy postamble | przepisanie postambu/ly + out_ps(pos_lines+1 " {r_file l_string readline pop") + out_ps("w_file exch writestring w_file (\\n) writestring} repeat") + out_ps("w_file flushclose r_file closefile quit") + printf "." +} + +function ps_fname(s) {gsub(/\\/,"/",s); return(s)} + +function out_ps(s) {print s > TMPSX} +function out_ps_block(block) {printf block > TMPSX} + +function out_ps_errorhandler() { + out_ps("/errq {" gs_abort "} def") + out_ps("errordict begin ") + out_ps("/ioerror {(\\010!Input/Output error occurred. (Disk full?)\\n\\007)") + out_ps(" print errq} def") + out_ps("/handleerror {$error begin (Something went wrong) print") + out_ps(" (\\n Error: ) print errorname 255 string cvs print") + out_ps(" (\\n\\007) print end errq} def") + out_ps("end") + # + out_ps("systemdict /resourcestatus known not") + out_ps("{(\\010!This version of Ghostscript doesn't support required Level 2 features\\n\\007)") + out_ps(" print quit} if") + if (is_A85()) check_filter("ASCII85Decode", "ASCII85Decode filter") + if (is_HEX()) check_filter("ASCIIHexDecode", "ASCIIHexDecode filter") + if (is_LZW()) check_filter("LZWDecode", "LZWDecode filter") + if (is_RLE()) check_filter("RunLengthDecode", "RunLengthDecode filter") + if (is_ZIP()) check_filter("FlateDecode", "FlateDecode filter") +} + function check_filter(name, expl) { + out_ps("/" name " /Filter resourcestatus {pop pop}") + out_ps("{(\\010!This version of Ghostscript doesn't support " expl "\\n\\007)") + out_ps(" print errq} ifelse") + } + +function errmessage(errname, errnum) { + print "UNCEP ERROR:", errname "\007"; exit(errnum) +} + + # determine file decoding method | ustalanie sposobu dekodowania pliku +function is_A85() {return (decodeline~/\/ASCII85Decode/)} +function is_HEX() {return (decodeline~/\/ASCIIHexDecode/)} +function is_LZW() {return (decodeline~/\/LZWDecode/)} +function is_RLE() {return (decodeline~/\/RunLengthDecode/)} +function is_ZIP() {return (decodeline~/\/FlateDecode/)} |