Bug in surrogate handling in internal UCS4 transcoder
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Key: XERCESC-1654
URL: http://issues.apache.org/jira/browse/XERCESC-1654
Project: Xerces-C++
Issue Type: Bug
Components: Utilities
Affects Versions: 2.7.0
Environment: any
Reporter: Boris Kolpackov
In util/XMLUCSTranscoder.cpp there is the following code which handles
surrogates (line 110):
const XMLCh ch1 = XMLCh(((nextVal - 0x10000) >> 10) + 0xD800);
const XMLCh ch2 = XMLCh(((nextVal - 0x10000) & 0x3FF) + 0xDC00);
I believe the second line should be:
const XMLCh ch2 = XMLCh((nextVal & 0x3FF) + 0xDC00);
See http://unicode.org/unicode/faq/utf_bom.html#35 for confirmation. Also,
while at it, I would suggest renaming XMLUCSTranscoder.cpp to
XMLUCST4ranscoder.cpp so that it is consistent with XMLUCS4Transcoder.hpp.
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