1WCWIDTH(P)                 POSIX Programmer's Manual                WCWIDTH(P)
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NAME

6       wcwidth - number of column positions of a wide-character code
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SYNOPSIS

9       #include <wchar.h>
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11       int wcwidth(wchar_t wc);
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DESCRIPTION

15       The  wcwidth()  function shall determine the number of column positions
16       required for the wide character wc. The application shall  ensure  that
17       the  value  of  wc  is a character representable as a wchar_t, and is a
18       wide-character code corresponding to a valid character in  the  current
19       locale.
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RETURN VALUE

22       The  wcwidth()  function  shall  either return 0 (if wc is a null wide-
23       character code), or return the number of column positions to  be  occu‐
24       pied by the wide-character code wc, or return -1 (if wc does not corre‐
25       spond to a printable wide-character code).
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ERRORS

28       No errors are defined.
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30       The following sections are informative.
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EXAMPLES

33       None.
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APPLICATION USAGE

36       This function was removed from  the  final  ISO/IEC 9899:1990/Amendment
37       1:1995  (E), and the return value for a non-printable wide character is
38       not specified.
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RATIONALE

41       None.
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FUTURE DIRECTIONS

44       None.
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SEE ALSO

47       wcswidth() ,  the  Base  Definitions  volume  of  IEEE Std 1003.1-2001,
48       <wchar.h>
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51       Portions  of  this text are reprinted and reproduced in electronic form
52       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
53       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
54       Specifications Issue 6, Copyright (C) 2001-2003  by  the  Institute  of
55       Electrical  and  Electronics  Engineers, Inc and The Open Group. In the
56       event of any discrepancy between this version and the original IEEE and
57       The  Open Group Standard, the original IEEE and The Open Group Standard
58       is the referee document. The original Standard can be  obtained  online
59       at http://www.opengroup.org/unix/online.html .
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63IEEE/The Open Group                  2003                           WCWIDTH(P)
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