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   2 .\" Copyright 2014 Garrett D'Amore <garrett@damore.org>
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  12 .TH WCWIDTH 3C "Jun 25, 2014"
  13 .SH NAME
  14 wcwidth, wcwidth_l \- number of column positions of a wide-character code
  15 .SH SYNOPSIS
  16 .LP
  17 .nf
  18 #include <wchar.h>
  19 
  20 \fBint\fR \fBwcwidth\fR(\fBwchar_t\fR \fIwc\fR);
  21 .fi
  22 .LP
  23 .nf
  24 #include <wchar.h>
  25 #include <xlocale.h>
  26 
  27 \fBint\fR \fBwcwidth_l\fR(\fBwchar_t\fR \fIwc\fR, \fBlocale_t\fR \fIloc\fR);
  28 .fi
  29 .SH DESCRIPTION
  30 .LP
  31 The \fBwcwidth()\fR function determines the number of column positions required
  32 for the wide character \fIwc\fR. The value of \fIwc\fR must be a character
  33 representable as a \fBwchar_t\fR, and must be a wide-character code
  34 corresponding to a valid character in the current locale.
  35 .LP
  36 The function \fBwcwidth_l()\fR behaves identically to \fBwcwidth()\fR, except
  37 instead of operating in the current locale, it operates in the locale
  38 specified by \fIloc\fR.
  39 .SH RETURN VALUES
  40 .LP
  41 These functions either return \fB0\fR (if \fIwc\fR is a null
  42 wide-character code), or the number of column positions to be occupied
  43 by the wide-character code \fIwc\fR, or \fB\(mi1\fR (if \fIwc\fR does
  44 not correspond to a printing wide-character code).
  45 .SH ERRORS
  46 .LP
  47 No errors are defined.
  48 .SH ATTRIBUTES
  49 .LP
  50 See \fBattributes\fR(5) for descriptions of the following attributes:
  51 .TS
  52 box;
  53 c | c
  54 l | l .
  55 ATTRIBUTE TYPE  ATTRIBUTE VALUE
  56 _
  57 CSI     Enabled
  58 _
  59 Interface Stability     See below.
  60 _
  61 MT-Level        MT-Safe
  62 .TE
  63 
  64 .LP
  65 The \fBwcwidth()\fR function is Standard.  The \fBwcwidth_l()\fR function
  66 is Uncommitted.
  67 .SH SEE ALSO
  68 .LP
  69 \fBnewlocale\fR(3C), \fBsetlocale\fR(3C), \fBuselocale\fR(3C),
  70 \fBwcswidth\fR(3C), \fBattributes\fR(5),
  71 \fBstandards\fR(5)