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Name

iswalpha, iswupper, iswlower, iswdigit, iswxdigit, iswalnum, iswspace, iswpunct, iswprint, iswcntrl, iswascii, iswgraph, isphonogram, isideogram, isenglish, isnumber, isspecial - Process Code character classification macros and functions

Synopsis

cc [ flag ... ] file ... -lw [ library ... ] 


#include <widec.h>
#include <wctype.h>

int iswalpha(wint_t c);

MT-Level

MT-Safe with exceptions

Wide Character Classification

These functions classify Process Code characters ( wchar_t ) from the primary and supplementary codesets by table lookup. Each is a predicate returning nonzero for true, zero for false. The lookup table, generated by wchrtbl(), contains values for both ASCII and supplementary codesets.

iswalpha(c)
c is a Latin alphabet Process Code character, from either the primary or supplementary codesets.
iswupper(c)
c is an upper case Latin alphabet Process Code character, from either the primary or supplementary codesets.
iswlower(c)
c is a lower case Latin alphabet Process Code character, from either the primary or supplementary codesets.
iswdigit(c)
c is a Process Code digit [0-9], from either the primary or supplementary codesets.
iswxdigit(c)
c is an ASCII hexadecimal Process Code digit [0-9], [A-F], or [a-f].
iswalnum(c)
c is a Process Code Latin letter or a digit, from either the primary or supplementary codesets.
iswspace(c)
c is a Process Code space, tab, carriage return, newline, vertical tab, or formfeed, from either the primary or supplementary codesets.
iswpunct(c)
c is an ASCII Process Code punctuation character (neither control nor alphanumeric).
iswprint(c)
c is a Process Code printing character, from either the primary or supplementary codesets. It includes the space character.
iswgraph(c)
c is a Process Code visible graphic character, from the primary or supplementary codesets. It does not include the space character.
iswcntrl(c)
c is a Process Code ASCII delete character or ordinary control character, or a control character from a supplementary codeset.
iswascii(c)
c is a Process Code ASCII character.
isphonogram(c)
c is a Process Code phonetic language character from a supplementary codeset.
isideogram(c)
c is a Process Code ideographic language character from a supplementary codeset.
isenglish(c)
c is a Process Code English language character from a supplementary codeset.
isnumber(c)
c is a Process Code digit [0-9] from a supplementary codeset.
isspecial(c)
c is a Process Code special language character from a supplementary codeset.

See Also

setlocale(3C) , stdio(3S) , wconv(3I) , ascii(5)

Notes

iswalpha(), iswupper(), iswlower(), iswdigit(), iswxdigit(), iswalnum(), iswspace(), iswpunct(), iswprint(), iswcntrl(), iswascii(), iswgraph(), isphonogram(), isideogram(), isenglish(), isnumber() and isspecial() can be used safely in a multi-thread application, as long as setlocale(3C) is not being called to change the locale.

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