[PDFBOX-756] Some characters from TeX-created files are mapped into ASCII range 1-31

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.2.0, 2.0.19, 3.0.0 PDFBox
• Fix Version/s: 2.0.20, 3.0.0 PDFBox
• Component/s: Text extraction
• Environment: Mac OS X 10.6.4
• Assignee: Andreas Lehmkühler
• Reporter: Thomas Fischer
• Created: 21/Jun/10 17:31
• Updated: 15/Jun/20 04:54
• Resolved: 05/Apr/20 12:56

Description

For some TeX-created files, some characters are mapped to low ASCII values. Example:
fx 2y − fx − 2y
instead of
(x + 2y) - f(x − 2y) =
With the non-printable characters denote by \xN, PDFBox's result is
f\x3x\x4 2y\x5 − f\x3x − 2y\x5 \x6
This probably cannot be fixed, since in another file the same numbers represent different characters:
Za

{a, a 1, . . .}

instead of
Z(a) =

{a, a + 1,...}

(Z\x4a\x5 \x6

{a, a \x7 1, . . .}

)
in another file.