[PATCH] msxml3: use XSD regex quantifier format S{0, m} instead of S{, m}

[Damjan Jovanovic]

S{,m} is invalid in libxml2 2.9.11 and later, and was never valid
in the XSD specification or any XML implementation tested.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=51358
Signed-off-by: Damjan Jovanovic 
---
 dlls/msxml3/datatypes.xsd | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

[Nikolay Sivov]

Hi, Damjan.

I'm not very familiar with schema parts. Is it possible to add a test
for this change?

[Damjan Jovanovic]

On Mon, Aug 9, 2021 at 8:34 AM Nikolay Sivov  wrote:
> Hi, Damjan.
>
> I'm not very familiar with schema parts. Is it possible to add a test
> for this change?

Hi Nikolay

We already have the necessary tests for this.

Using an affected libxml2 version (2.9.12, possibly 2.9.11 too):

WINEDEBUG='+msxml' wine msxml3_test.exe schema

With my patch:
0020:schema: 979 tests executed (39 marked as todo, 0 failures), 0 skipped.

Without my patch:
...
regexp error : failed to compile: Improper quantifier
regexp error : failed to compile: xmlFAParseRegExp: extra characters
0024:err:msxml:Schema_parse error code 1756: Element '{
http://www.w3.org/2001/XMLSchema%7Dpattern': The value
'([0-9]{,14})([.][0-9]{,4})?' of the facet 'pattern' is not a valid regular
expression.
regexp error : failed to compile: Improper quantifier
regexp error : failed to compile: xmlFAParseAtom: expecting ')'
regexp error : failed to compile: xmlFAParseRegExp: extra characters
0024:err:msxml:Schema_parse error code 1756: Element '{
http://www.w3.org/2001/XMLSchema%7Dpattern': The value
'([0-9A-Fa-f]{4})([-]{,1}[0-9A-Fa-f]{4})*' of the facet 'pattern' is not a
valid regular expression.
0024:fixme:msxml:cache_entry_from_xdr_doc failed to parse doc
0024:trace:msxml:domdoc_Release (0x260cb8)->(1)
schema.c:526: Test failed: IXMLDOMSchemaCollection_add(cache, NULL,
_variantdoc_(doc)) returned 80004005
0024:trace:msxml:schema_cache_get_length (0x260e08)->(0x21fba4)
schema.c:529: Test failed: got 0
0024:trace:msxml:schema_cache_get_namespaceURI (0x260e08)->(0 0x21fba8)
schema.c:532: Test failed: IXMLDOMSchemaCollection_get_namespaceURI(cache,
0, &str) returned 80004005
schema.c:533: Test failed: got 00000000
0024:trace:msxml:schema_cache_get (0x260e08)->((null) 0x21fbc4)
schema.c:538: Test failed: 00000000
wine: Unhandled page fault on read access to 00000000 at address 6286F028
(thread 0024), starting debugger...
couldn't load main module (2)
Unhandled exception: page fault on read access to 0x00000000 in 32-bit code
(0x6286f028).