[jira] Updated: (XERCESC-1385) UTF8 parse failure when there's a bom in the utf8 header

["Miklos Fazekas (JIRA)" <xe...@xml.apache.org>]

     [ http://issues.apache.org/jira/browse/XERCESC-1385?page=history ]

Miklos Fazekas updated XERCESC-1385:
------------------------------------

    Attachment: test.cpp

Attached a simple test app showing the issue. The second parse failes with the bom.

> UTF8 parse failure when there's a bom in the utf8 header
> --------------------------------------------------------
>
>          Key: XERCESC-1385
>          URL: http://issues.apache.org/jira/browse/XERCESC-1385
>      Project: Xerces-C++
>         Type: Bug
>   Components: SAX/SAX2
>     Versions: 2.6.0
>  Environment: OSX, CodeWarrior 9.4
>     Reporter: Miklos Fazekas
>  Attachments: test.cpp
>
> This issue probably related to 1284. (Or a duplicate of it)
> The attached sample code failes with Xerces2.6. 
> The problem seems to be that there's double checing for the utf8 bom. Bellow is a patch to XMLParser.cpp that resolves this issue. [ The bug is that we've already detected utf8 bom and modified fRawBufIndex, but the seconds check doesn't takes it into accout. ]
> src/xercesc/internal/XMLReader.cpp
> @@ -544,7 +544,7 @@
>              }
>              // If there's a utf-8 BOM  (0xEF 0xBB 0xBF), skip past it.
>              else {
> -                const char* asChars = (const char*)fRawByteBuf;
> +                const char* asChars = (const char*)(fRawByteBuf + fRawBufIndex);
>                  if ((fRawBytesAvail > XMLRecognizer::fgUTF8BOMLen )&&
>                      (XMLString::compareNString(  asChars
>                      , XMLRecognizer::fgUTF8BOM
> It's also possible that we should check if we detected an utf8 bom already as the following code would probably allow a double utf8 bom.

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