Re: [xml] Strange validation errors in libxml 2.9.0 with MSVC 2010

[Zoltán Ördögh (GMail) <csimbi gmail com>]

I saw this code in xmllint.c (removed conditionals that do not apply):

static void streamFile(char *filename) {
    xmlTextReaderPtr reader;
    int ret;
    reader = xmlReaderForFile(filename, NULL, options);

    if (reader != NULL) {
    if (valid)
        xmlTextReaderSetParserProp(reader, XML_PARSER_VALIDATE, 1);
    else
        xmlTextReaderSetParserProp(reader, XML_PARSER_LOADDTD, 1);

    /*
     * Process all nodes in sequence
     */
    if ((timing) && (!repeat)) {
        startTimer();
    }
    ret = xmlTextReaderRead(reader);
    while (ret == 1) {
        if ((debug)
           )
        processNode(reader);
        ret = xmlTextReaderRead(reader);
    }
    if ((timing) && (!repeat)) {
        if (valid)
        endTimer("Parsing and validating");
        else
        endTimer("Parsing");
    }

    if (valid) {
        if (xmlTextReaderIsValid(reader) != 1) {
        xmlGenericError(xmlGenericErrorContext,
            "Document %s does not validate\n", filename);
        progresult = XMLLINT_ERR_VALID;
        }
    }
    /*
     * Done, cleanup and status
     */
    xmlFreeTextReader(reader);
    if (ret != 0) {
        fprintf(stderr, "%s : failed to parse\n", filename);
        progresult = XMLLINT_ERR_UNCLASS;
    }
    } else {
    fprintf(stderr, "Unable to open %s\n", filename);
    progresult = XMLLINT_ERR_UNCLASS;
    }
}

I tried using the exact same code but I still get the same validation errors on the first call to xmlTextReaderRead...
It is vexing me...
Any thoughts?

Thank you!

Best regards: Zoltán Ördögh

On Sat, Apr 6, 2013 at 2:00 AM, Zoltán Ördögh (GMail) <csimbi gmail com> wrote:

Hi all,
I've been using libxml 2.7.7 in the past with BCB6 and it was working fine.
Now I use libxml 2.9.0 with MSVC 2010 (_MSC_VER = 1600) and I get strange validation errors when I try to read the file back that I wrote out before.

I am getting a bit frustrated because I am using the exact same code as I did in BCB6 and despite all my efforts, it always fails.
When I validate the XML with a third-party tool, it all checks out just fine.
When I run: "xmllint.exe --valid testme.xml", it simply dumps the XML back without any validation errors.
For some reason, libxml 2.9.0 on MSVC 2010 won't validate it (even though it's from the same build as xmllint.exe itself).

This is the code that opens the file:

#include "libxml/xmlreader.h"
.
.
.
m_pxmlTextReader=xmlReaderForFile(sXML.c_str(), NULL, XML_PARSE_COMPACT | XML_PARSE_BIG_LINES | XML_PARSE_DTDVALID);

if(m_pxmlTextReader)
{
    if(xmlTextReaderRead(m_pxmlTextReader)==1 && xmlTextReaderIsValid(m_pxmlTextReader)==1)
    {
        // processing
    }
...


"// processing" is never reached due to the validation errors.
I attached a simple XML with the DTD that can be used to test it in case you're willing to give it a go.
I captured the errors I see in output.txt, please find it attached.
As you can see from the output, the DTD is found but for some reason, libxml can't match it vs. the XML file.

I don't think it's relevant but this is the libxml config that I use at the moment:

Config command:
cscript configure.js iconv=no static=yes debug=yes compiler=msvc prefix=..\..\..\libxml2

Build commands:
call "C:\Program Files (x86)\MSVS10\VC\vcvarsall.bat"
nmake /f Makefile.msvc
nmake /f Makefile.msvc install

Config output:
Microsoft (R) Windows Script Host Version 5.8
Copyright (C) Microsoft Corporation. All rights reserved.

libxml2 version: 2.9.0
Created Makefile.
Created config.h.

XML processor configuration
---------------------------
              Trio: no
     Thread safety: native
        FTP client: yes
       HTTP client: yes
    HTML processor: yes
      C14N support: yes
   Catalog support: yes
   DocBook support: yes
     XPath support: yes
  XPointer support: yes
  XInclude support: yes
     iconv support: no
     icu   support: no
  iso8859x support: no
      zlib support: no
      lzma support: no
  Debugging module: yes
  Memory debugging: no
 Runtime debugging: no
    Regexp support: yes
    Module support: yes
      Tree support: yes
    Reader support: yes
    Writer support: yes
    Walker support: yes
   Pattern support: yes
      Push support: yes
Validation support: yes
      SAX1 support: yes
    Legacy support: yes
    Output support: yes
XML Schema support: yes
Schematron support: yes
   Python bindings: no

Win32 build configuration
-------------------------
          Compiler: msvc
  C-Runtime option: /MD
    Embed Manifest: no
     Debug symbols: yes
    Static xmllint: yes
    Install prefix: ..\..\..\libxml2
      Put tools in: $(PREFIX)\bin
    Put headers in: $(PREFIX)\include
Put static libs in: $(PREFIX)\lib
Put shared libs in: $(PREFIX)\bin
      Include path: .
          Lib path: .

I guess it must be something I have overlooked.
Thank you!

Best regards: Zoltán Ördögh