How do I convert utf8 to/from utf16 in C?

Question

Is there a library available or do I need to design/code my own? The target platform is very old and the compiler does not provide wchar_t.

No library allowed so plain c/headers will be appropriate

Answer 1

Here is a sample implementation in C

Answer 2

Unicode consortium's sample implementation is here. Look up this FAQ and examples. Or, do you want to try out a library like libidn or libicc?

Answer 3

also You can try iconv(). On some platform it's part of C-runtime.