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34 .\" @(#)isalnum.3 5.2 (Berkeley) 6/29/91
52 .Nd wide character classification utilities
58 .Fn iswalnum "wint_t wc"
60 .Fn iswalpha "wint_t wc"
62 .Fn iswblank "wint_t wc"
64 .Fn iswcntrl "wint_t wc"
66 .Fn iswdigit "wint_t wc"
68 .Fn iswgraph "wint_t wc"
70 .Fn iswlower "wint_t wc"
72 .Fn iswprint "wint_t wc"
74 .Fn iswpunct "wint_t wc"
76 .Fn iswspace "wint_t wc"
78 .Fn iswupper "wint_t wc"
80 .Fn iswxdigit "wint_t wc"
82 The functions are character classification utility functions,
83 for use with wide characters
89 See the description of singlebyte classification functions, like
93 The functions return zero if the character tests false and
94 return non-zero if the character tests true.
109 The functions conform to
112 The argument to these functions must be
116 value with the current locale; otherwise, the result is undefined.