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OpenSolaris 2009.06 - man page for wcswidth (opensolaris section 3c)

wcswidth(3C)						   Standard C Library Functions 					      wcswidth(3C)

NAME
wcswidth - number of column positions of a wide-character string
SYNOPSIS
#include <wchar.h> int wcswidth(const wchar_t *pwcs, size_t n);
DESCRIPTION
The wcswidth() function determines the number of column positions required for n wide-character codes (or fewer than n wide-character codes if a null wide-character code is encountered before n wide-character codes are exhausted) in the string pointed to by pwcs.
RETURN VALUES
The wcswidth() function either returns 0 (if pwcs points to a null wide-character code), or returns the number of column positions to be occupied by the wide-character string pointed to by pwcs, or returns -1 (if any of the first n wide-character codes in the wide-character string pointed to by pwcs is not 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), wcwidth(3C), attributes(5), standards(5) SunOS 5.11 14 Aug 2002 wcswidth(3C)