fix build and add functions to dll

[Simplxss]

No description provided.

[ihedvall]

Hint: There is a std::string::data() function added so you can write something like:

std::string s(size);
MdfTagGetName(eTag, s.data());

instead

[Simplxss]

Hint: There is a std::string::data() function added so you can write something like:

std::string s(size);
MdfTagGetName(eTag, s.data());

instead

It doesn't work. std::string is not std::vector.

The following code works sometimes, but sometimes it doesn't,

    std::string str;
    str.reserve(MdfAttachmentGetFileType(attachment, nullptr) + 1);
    str.resize(MdfAttachmentGetFileType(attachment, str.data()));
    return str;

[ihedvall]

std::string s(size, '\0'); ?

[ihedvall]

According to the CMake manual, you should add library as a MODULE. If so, you dont't need the Export.cpp file. The -NET have all export function. Well worth a try at least

[Simplxss]

Cannot. src/MdfExport.cpp contains functions that need to be exported. If change SHARED to MODULE, cmake would not export symbols to dll.
As the CMake manual said.
"For example, a Windows resource DLL or a managed C++/CLI DLL that exports no unmanaged symbols would need to be a MODULE library."

[Simplxss]

I tried to change SHARED to MODULE, and cmake complains that Target "mdflibrary" of type MODULE_LIBRARY may not be linked into another target. One may link only to INTERFACE, OBJECT, STATIC or SHARED libraries, or to executables with the ENABLE_EXPORTS property set. when run target_link_libraries(mdflibraryexample PRIVATE mdflibrary).

[ihedvall]

Minor check if the SHARED ->MODULE is a simpler solution