C# marshalling of std::wstring on Linux
2012-07-26 11:11:46 GMT
Hello,
On Linux with Mono I have a SWIG C# wrapper which marshals a C# string method parameter using:
[MarshalAs(UnmanagedType.LPWStr)]
This converts the C# string into a 2 byte native string and passes its address as a wchar_t * to the SWIG generated C wrapper function.
At this point the SWIG generated C function constructs a std::wstring from the wchar_t pointer, however on my Linux system, wchar_t is 4 bytes, therefore the wstring constructor goes ahead blindly thinking the wchar_t pointer contains 4 byte character data, but it in fact contains 2 byte character data.
The same assumption and problem seems to exist in SWIG_csharp_wstring_callback when returning strings.
Is this a bug in SWIG? And is there a way I can use typemaps to provide a custom to/from conversion for Linux (It all works fine on Windows).
Regards,
Andrew Ward.
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