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SunOS 5.10 - man page for wcwidth (sunos section 3c)

wcwidth(3C)						   Standard C Library Functions 					       wcwidth(3C)

NAME
wcwidth - number of column positions of a wide-character code
SYNOPSIS
#include <wchar.h> int wcwidth(wchar_t wc);
DESCRIPTION
The wcwidth() function determines the number of column positions required for the wide character wc. The value of wc must be a character representable as a wchar_t, and must be a wide-character code corresponding to a valid character in the current locale.
RETURN VALUES
The wcwidth() function either returns 0 (if wc is a null wide-character code), or returns the number of column positions to be occupied by the wide-character code wc, or returns -1 (if wc does not correspond to a printing wide-character code).
ERRORS
No errors are defined.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |CSI |Enabled | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe with exceptions | +-----------------------------+-----------------------------+
SEE ALSO
setlocale(3C), wcswidth(3C), attributes(5), standards(5) SunOS 5.10 14 Aug 2002 wcwidth(3C)