man3/wctype.3

   1 .\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
   2 .\"
   3 .\" This is free documentation; you can redistribute it and/or
   4 .\" modify it under the terms of the GNU General Public License as
   5 .\" published by the Free Software Foundation; either version 2 of
   6 .\" the License, or (at your option) any later version.
   7 .\"
   8 .\" References consulted:
   9 .\"   GNU glibc-2 source code and manual
  10 .\"   Dinkumware C library reference http://www.dinkumware.com/
  11 .\"   OpenGroup's Single Unix specification http://www.UNIX-systems.org/online.html
  12 .\"   ISO/IEC 9899:1999
  13 .\"
  14 .TH WCTYPE 3  1999-07-25 "GNU" "Linux Programmer's Manual"
  15 .SH NAME
  16 wctype \- wide character classification
  17 .SH SYNOPSIS
  18 .nf
  19 .B #include <wctype.h>
  20 .sp
  21 .BI "wctype_t wctype(const char *" name );
  22 .fi
  23 .SH DESCRIPTION
  24 The \fBwctype_t\fP type represents a property which a wide character may or
  25 may not have. In other words, it represents a class of wide characters.
  26 This type's nature is implementation dependent, but the special value
  27 \fI(wctype_t)0\fP denotes an invalid property. Nonzero \fBwctype_t\fP values
  28 can be passed to the \fBiswctype\fP function to actually test whether a given
  29 wide character has the property.
  30 .PP
  31 The \fBwctype\fP function returns a property, given by its name. The set of
  32 valid names depends on the LC_CTYPE category of the current locale, but the
  33 following names are valid in all locales.
  34 .nf
  35   "alnum" \- realizes the \fBisalnum\fP classification function
  36   "alpha" \- realizes the \fBisalpha\fP classification function
  37   "blank" \- realizes the \fBisblank\fP classification function
  38   "cntrl" \- realizes the \fBiscntrl\fP classification function
  39   "digit" \- realizes the \fBisdigit\fP classification function
  40   "graph" \- realizes the \fBisgraph\fP classification function
  41   "lower" \- realizes the \fBislower\fP classification function
  42   "print" \- realizes the \fBisprint\fP classification function
  43   "punct" \- realizes the \fBispunct\fP classification function
  44   "space" \- realizes the \fBisspace\fP classification function
  45   "upper" \- realizes the \fBisupper\fP classification function
  46   "xdigit" \- realizes the \fBisxdigit\fP classification function
  47 .fi
  48 .SH "RETURN VALUE"
  49 The \fBwctype\fP function returns a property descriptor if the \fIname\fP is
  50 valid. Otherwise it returns \fI(wctype_t)0\fP.
  51 .SH "CONFORMING TO"
  52 ISO/ANSI C, UNIX98
  53 .SH "SEE ALSO"
  54 .BR iswctype (3)
  55 .SH NOTES
  56 The behaviour of \fBwctype\fP depends on the LC_CTYPE category of the
  57 current locale.