NAME

wctype, 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(int 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

wctype(), 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. 

Sun Microsystems  —  Last change: 7 Apr 1993