wctomb, wcrtomb: guard slow/trap path with MB_LEN_MAX

This allows the compiler to optimize out the slow/trap path at all
for the typical correct code:

char buf[MB_LEN_MAX];
r = wctomb(buf, c);

The change tries to keep the "unknown object size" case handling in
wcrtomb() as is even if it seems redundant and not helping (we copy
__buf to possibly undersized __s in any case) and inconsistent with
wctomb() (where we let the original library method itself overwrite
the possibly undersized __s).

0 files changed, 0 insertions, 0 deletions