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RedHat 9 (Linux i386) - man page for wcwidth (redhat section 3)

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

NAME
wcwidth - determine columns needed for a wide character
SYNOPSIS
#include <wchar.h> int wcwidth(wchar_t c);
DESCRIPTION
The wcwidth function returns the number of columns needed to represent the wide character c. If c is a print- able wide character, the value is at least 0. If c is L'\0', the value is 0. Otherwise -1 is returned.
RETURN VALUE
The wcwidth function returns the number of column positions for c.
CONFORMING TO
UNIX98. POSIX.1-2001. Note that glibc before 2.2.5 used the prototype int wcwidth(wint_t c);
SEE ALSO
wcswidth(3), iswprint(3)
NOTES
The behaviour of wcwidth depends on the LC_CTYPE category of the current locale.
GNU
1999-07-25 WCWIDTH(3)


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