46. wctype.h (C99)

Macro:

WEOF

Types:

wctrans_t, wctype_t, wint_t

Functions:

iswalnum, iswalpha, iswblank, iswcntrl, iswctype, iswdigit, iswgraph, iswlower, iswprint, iswpunct, iswspace, iswupper, iswxdigit, towctrans, towlower, towupper, wctrans, wctype