determines whether the state object is
in initial state
determines whether the state object pointed to by ps
is in initial conversion state, or not.
ps may be a
NULL pointer. In this case,
will always return non-zero.
- The current state is not in initial state.
- The current state is in initial state or ps is a
No errors are defined.
mbsinit() function conforms to ISO/IEC
9899/AMD1:1995 (“ISO C90, Amendment 1”).