yes, I'm pretty sure it does. When you look at the LibraryLink examples, you see that LibraryLink uses UTF8 strings as well. In the example code you find
char *instring = MArgument_getUTF8String(Args); char *substring = MArgument_getUTF8String(Args); mint i, n = strlen(instring); mint slen = strlen(substring);
which doesn't uses the length but calls strlen instead. If the string is not null-terminated, strlen would fail, because how should it know whether the string is over if not by the final \0.
When MathLink and LibraryLink share the same Wolfram type (what they hopefully do), you should be on the safe side.
On Feb 18, 2013, at 12:02 PM, Szabolcs Horv=E1t <firstname.lastname@example.org> wrote:
> > Does the C MathLink function MLGetUTF8String() return a null-terminated > string? The documentation does not say that it does and it returns the > length of the string as well. But if it did, it would spare me some > copying, as my target requires a null-terminated UTF-8 string. > >