Implementing basic_string::substr in msvcp90

[Daniel Mierswa]

Hey list,
I was wondering how to implement substr in msvcp90/string.c. I followed
the already existing code when implementing some operators and other
things my application needed but I'm not sure how to construct a new
string (rather allocate) and return it as it's the case with substr.
Any ideas on this?

Thanks in advance.