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  11 .TH WCWIDTH 3C "Aug 14, 2002"
  12 .SH NAME
  13 wcwidth, wcwidth_l \- number of column positions of a wide-character code
  14 .SH SYNOPSIS
  15 .LP
  16 .nf
  17 #include <wchar.h>
  18 
  19 \fBint\fR \fBwcwidth\fR(\fBwchar_t\fR \fIwc\fR);
  20 \fBint\fR \fBwcwidth_l\fR(\fBwchar_t\fR \fIwc\fR, \fBlocale_t\fR \fIloc\fR);
  21 .fi
  22 
  23 .SH DESCRIPTION
  24 .sp
  25 .LP
  26 The \fBwcwidth()\fR function determines the number of column positions required
  27 for the wide character \fIwc\fR. The value of \fIwc\fR must be a character
  28 representable as a \fBwchar_t\fR, and must be a wide-character code
  29 corresponding to a valid character in the current locale.
  30 .sp
  31 .LP
  32 The function \fBwcwidth_l()\fR behaves identically to \fBwcwidth()\fR, except
  33 instead of operating in the current environemtn, it operates in the environment
  34 specified by \fIloc\fR.
  35 .SH RETURN VALUES
  36 .SH RETURN VALUES
  37 .sp
  38 .LP
  39 The \fBwcwidth()\fR function either returns \fB0\fR (if \fIwc\fR is a null
  40 wide-character code), or returns the number of column positions to be occupied
  41 by the wide-character code \fIwc\fR, or returns \fB\(mi1\fR (if \fIwc\fR does
  42 not correspond to a printing wide-character code).
  43 .SH ERRORS
  44 .sp
  45 .LP
  46 No errors are defined.
  47 .SH ATTRIBUTES
  48 .sp
  49 .LP
  50 See \fBattributes\fR(5) for descriptions of the following attributes:
  51 .sp
  52 
  53 .sp
  54 .TS
  55 box;
  56 c | c
  57 l | l .
  58 ATTRIBUTE TYPE  ATTRIBUTE VALUE
  59 _
  60 CSI     Enabled
  61 _
  62 Interface Stability     Standard
  63 _
  64 MT-Level        MT-Safe with exceptions
  65 .TE
  66 
  67 .SH SEE ALSO
  68 .sp
  69 .LP
  70 \fBsetlocale\fR(3C), \fBwcswidth\fR(3C), \fBattributes\fR(5),
  71 \fBstandards\fR(5)