[PDFBOX-4032] Handle correctly special characters while writing COSString

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Won't Do
• Affects Version/s: 2.0.8
• Component/s: Writing
• Flags: Patch

Docs Text

Table 3 – Escape sequences in literal strings
Sequence Meaning
\n LINE FEED (0Ah) (LF)
\r CARRIAGE RETURN (0Dh) (CR)
\t HORIZONTAL TAB (09h) (HT)
\b BACKSPACE (08h) (BS)
\f FORM FEED (FF)
\( LEFT PARENTHESIS (28h)
\) RIGHT PARENTHESIS (29h)
\\ REVERSE SOLIDUS (5Ch) (Backslash)

• Assignee: Unassigned
• Reporter: Ladislav Dudáš
• Created: 08/Dec/17 17:55
• Updated: 23/May/20 11:08
• Resolved: 14/Jan/18 16:57

Description

Regarding to case PDFBOX-3107. There was change in CosWritter.java that if string contains characters CR (0x0d) and LF (0x0a) the string is written in hex format. This may be ok, but PDF specification (7.3.4.2 Literal Strings) explicitly defines more characters that should handle specially.

I'm providing another version of the code that handles all special characters without transforming to hex format.

PR #41

Issue Links

• supercedes: PDFBOX-3107 Asterisk character not displaying properly in Adobe Reader
• links to: GitHub Pull Request #41
• links to: GitHub Pull Request #41