1WCWIDTH(3)                 Linux Programmer's Manual                WCWIDTH(3)
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NAME

6       wcwidth - determine columns needed for a wide character
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SYNOPSIS

9       #define _XOPEN_SOURCE       /* See feature_test_macros(7) */
10       #include <wchar.h>
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12       int wcwidth(wchar_t c);
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DESCRIPTION

15       The  wcwidth()  function returns the number of columns needed to repre‐
16       sent the wide character c.  If c is a  printable  wide  character,  the
17       value is at least 0.  If c is null wide character (L'\0'), the value is
18       0.  Otherwise -1 is returned.
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RETURN VALUE

21       The wcwidth() function returns the number of column positions for c.
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CONFORMING TO

24       POSIX.1-2001.
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26       Note that glibc before 2.2.5 used the prototype
27       int wcwidth(wint_t c);
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NOTES

30       The behavior of wcwidth() depends on the LC_CTYPE category of the  cur‐
31       rent locale.
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SEE ALSO

34       iswprint(3), wcswidth(3)
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COLOPHON

37       This  page  is  part of release 3.53 of the Linux man-pages project.  A
38       description of the project, and information about reporting  bugs,  can
39       be found at http://www.kernel.org/doc/man-pages/.
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43GNU                               2011-09-28                        WCWIDTH(3)
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