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Posted to c-dev@xerces.apache.org by "Heeg, Michael" <He...@fev.de> on 2004/04/15 09:07:55 UTC
Strange problem with pattern (Xerces 2.5.0 crashes)
Hi,
I am using Xerces-C 2.5.0 in my MS Visual C++ application. When validating
XML files against a specified schema, the parser sometimes crashes with an
"unexpected exception". I found out that the reason for the crashes is the
following restriction of the schema (see "Body" element):
<xsd:complexType name="InputFileType">
<xsd:sequence>
<xsd:element name="Head" type="HeadType"/>
<xsd:element name="Body">
<xsd:simpleType>
<xsd:restriction base="xsd:string">
<xsd:pattern
value="(\n*[0-9]*,[0-9]*,(\-*[0-9]*\.*[0-9]*,)*\-*[0-9]+\.*[0-9]*;\n*)*"/>
</xsd:restriction>
</xsd:simpleType>
</xsd:element>
</xsd:sequence>
</xsd:complexType>
The restriction is defined to validate <Body> tags like the following:
<Body>
0,10,0.199,10.199,0.008;
1,20,0.389,20.389,0.059;
2,30,0.565,30.565,0.180;
3,40,0.717,40.717,0.369;
4,50,0.841,50.841,0.596;
5,60,0.932,60.932,0.810;
....
</Body>
The strange thing is: when the <Body> tag contains a large amount of data,
the validation of the restriction leads to the unexpected exception. But:
with a small amount of data, everything works fine. (Also: when I delete the
restriction from the schema, everything works fine.)
For me this looks like a Xerces bug?! Am I wrong? Any suggestions or
comments?
Best regards,
Michael
P.S.: I know that the way we use this <Body> tag is not the best way to
handle csv-like data, but I had to do this because of an existing file
format.
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Re: Strange problem with pattern (Xerces 2.5.0 crashes)
Posted by Gareth Reakes <ga...@parthenoncomputing.com>.
Hi,
can you post a working schema and instance file (preferably small)
and I will take a look.
Cheers,
Garth
On Thu, 15 Apr 2004, Heeg, Michael wrote:
> Hi,
>
> I am using Xerces-C 2.5.0 in my MS Visual C++ application. When validating
> XML files against a specified schema, the parser sometimes crashes with an
> "unexpected exception". I found out that the reason for the crashes is the
> following restriction of the schema (see "Body" element):
>
> <xsd:complexType name="InputFileType">
> <xsd:sequence>
> <xsd:element name="Head" type="HeadType"/>
> <xsd:element name="Body">
> <xsd:simpleType>
> <xsd:restriction base="xsd:string">
> <xsd:pattern
> value="(\n*[0-9]*,[0-9]*,(\-*[0-9]*\.*[0-9]*,)*\-*[0-9]+\.*[0-9]*;\n*)*"/>
> </xsd:restriction>
> </xsd:simpleType>
> </xsd:element>
> </xsd:sequence>
> </xsd:complexType>
>
> The restriction is defined to validate <Body> tags like the following:
>
> <Body>
> 0,10,0.199,10.199,0.008;
> 1,20,0.389,20.389,0.059;
> 2,30,0.565,30.565,0.180;
> 3,40,0.717,40.717,0.369;
> 4,50,0.841,50.841,0.596;
> 5,60,0.932,60.932,0.810;
> ....
> </Body>
>
> The strange thing is: when the <Body> tag contains a large amount of data,
> the validation of the restriction leads to the unexpected exception. But:
> with a small amount of data, everything works fine. (Also: when I delete the
> restriction from the schema, everything works fine.)
>
> For me this looks like a Xerces bug?! Am I wrong? Any suggestions or
> comments?
>
> Best regards,
> Michael
>
>
> P.S.: I know that the way we use this <Body> tag is not the best way to
> handle csv-like data, but I had to do this because of an existing file
> format.
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: xerces-c-dev-unsubscribe@xml.apache.org
> For additional commands, e-mail: xerces-c-dev-help@xml.apache.org
>
--
Gareth Reakes, Managing Director Parthenon Computing
+44-1865-811184 http://www.parthcomp.com
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