[XERCESC-1021] RegularExpression: wrong Match end for fixed string match

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.3.0
• Fix Version/s: 3.1.0
• Component/s: Utilities
• Environment: Operating System: All; Platform: All
• Bugzilla Id: 23707
• Assignee: Alberto Massari
• Reporter: Dave Cohrs
• Created: 10/Oct/03 03:26
• Updated: 12/Mar/18 03:01
• Resolved: 29/Jul/09 16:53

Description

RegularExpression::matches() calls context->fMatch->setEndPos()
with the wrong value when doing a fFixedStringOnly match and not
in XMLSCHEMA_MODE (i.e. a fixed string match using a Perl-like pattern).

The problem is this line of code (line 546 of RegularExpression.cpp in
the 2.3 src distro):
context->fMatch->setEndPos(0, ret + strLength);

strLength is the length of the "expression" parameter passed to matches().
I believe the value really should be the length of fFixedString. As it
currently exists, the call to setEndPos() generally sets a value that is
beyond the end of "expression".

This bug has no effect on XMLSCHEMA_MODE, which never uses this code.