ISWPRINT(3) Linux Programmers Manual ISWPRINT(3)
iswprint - test for printing wide character
int iswprint(wint_t wc);
The iswprint() function is the wide-character equivalent of the
isprint(3) function. It tests whether wc is a wide character belonging
to the wide-character class "print".
The wide-character class "print" is disjoint from the wide-character
The wide-character class "print" contains the wide-character class
The iswprint() function returns non-zero if wc is a wide character
belonging to the wide-character class "print". Otherwise it returns
The behavior of iswprint() depends on the LC_CTYPE category of the cur
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GNU 1999-07-25 ISWPRINT(3)