Re: [xml] xmlOutputBufferCreateFile VS2015 I/O error : Bad file descriptor

[Sylvain Pointeau <sylvain pointeau gmail com>]

Hello,

It works if I link (statically) to libxml2_a_dll.lib or libxml2_a.lib

what is the difference between the two libs?

for reference I compile libxml this way: 

cscript.exe configure.js iconv=no ftp=no http=no compiler=msvc cruntime=/MT  debug=yes  prefix="build_debug_static_mt" static=yes

I am not sure about the flag static=yes... it seems there is no effect, do you confirm?

additionally I removed iconv (iconv=no), do you confirm that reading UTF-8 and UTF-16 will still work?

do you have any idea why the dynamic linking is not working?

Best regards,

Sylvain

 

On Sat, Apr 16, 2016 at 5:44 PM, Sylvain Pointeau <sylvain pointeau gmail com> wrote:

Hello,

it also fails when creating the FILE *f = (FILE*) xmlFileOpen("C:\\test_data\\testxml.xml");

or using the file descriptor:

int fd = _open("C:\\test_data\\testxml.xml", _O_CREAT | _O_RDWR);

xmlOutputBufferPtr output = xmlOutputBufferCreateFd(fd, NULL);

Does anyone have an idea on where the issue could be?

Best regards,

Sylvain

On Sat, Apr 16, 2016 at 11:59 AM, Sylvain Pointeau <sylvain pointeau gmail com> wrote:

hello again,

I investigated a bit more with my own compiled libxml2 in debug mode, the stack trace is:

  libxml2.dll!_invalid_parameter(const wchar_t * const _expression_, const wchar_t * const function_name, const wchar_t * const file_name, const unsigned int line_number, const unsigned int reserved) Line 91 C++

  libxml2.dll!_invalid_parameter_noinfo() Line 97 C++

  libxml2.dll!_write(int fh, const void * buffer, unsigned int size) Line 48 C++

> libxml2.dll!__acrt_stdio_flush_nolock(_iobuf * public_stream) Line 152 C++

  libxml2.dll!_fflush_nolock(_iobuf * public_stream) Line 114 C++

  libxml2.dll!fflush(_iobuf * stream) Line 94 C++

  libxml2.dll!xmlFileFlush(void * context) Line 1104 C

  libxml2.dll!xmlOutputBufferClose(_xmlOutputBuffer * out) Line 2606 C

Best regards,

Sylvain

On Sat, Apr 16, 2016 at 11:25 AM, Sylvain Pointeau <sylvain pointeau gmail com> wrote:

Hello,

using 

xmlOutputBufferPtr output = xmlOutputBufferCreateFilename("C:\\myfolder\testdata.xml", 0, 0);

works...

what can be wrong with xmlOutputBufferCreateFile?

Best regards,

Sylvain

On Sat, Apr 16, 2016 at 10:23 AM, Sylvain Pointeau <sylvain pointeau gmail com> wrote:

Hello,

porting my program on windows, I noticed that xmlOutputBufferCreateFile raised a message  I/O error : Bad file descriptor. Below is the sample program that crashes for me:

FILE *f = fopen("C:\\myfolder\testdata.xml", "w");

xmlOutputBufferPtr output = xmlOutputBufferCreateFile(f, NULL);

xmlOutputBufferWriteString(output, "WHY DO YOU CRASH?");

xmlOutputBufferClose(output); <- at this moment it displays I/O error : Bad file descriptor

fclose(f);

I linked on libs pre-compiled for win32,

I also tried with the lib I compiled myself, it even crashes in this case (it does not display IO error)

Please note that the parsing (SAX) runs well.

Do you have any idea? is it a bug or something I am not doing well?

Best regards,

Sylvain