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wcswidth_l(3) [osx man page]

WCSWIDTH(3)						   BSD Library Functions Manual 					       WCSWIDTH(3)

NAME
wcswidth, wcswidth_l -- number of column positions in wide-character string LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <wchar.h> int wcswidth(const wchar_t *pwcs, size_t n); #include <wchar.h> #include <xlocale.h> int wcswidth_l(const wchar_t *pwcs, size_t n, locale_t loc); DESCRIPTION
The wcswidth() function determines the number of column positions required for the first n characters of pwcs, or until a null wide character (L'') is encountered. Although the wcswidth() function uses the current locale, the wcswidth_l() function may be passed a locale directly. See xlocale(3) for more information. RETURN VALUES
The wcswidth() function returns 0 if pwcs is an empty string (L""), -1 if a non-printing wide character is encountered; otherwise, it returns the number of column positions occupied. SEE ALSO
iswprint(3), wcwidth(3), xlocale(3) STANDARDS
The wcswidth() function conforms to IEEE Std 1003.1-2001 (``POSIX.1''). BSD
August 20, 2002 BSD

Check Out this Related Man Page

wcswidth(3)						     Library Functions Manual						       wcswidth(3)

NAME
wcswidth - Determines the display width of wide-character strings LIBRARY
Standard C Library (libc) SYNOPSIS
#include <wchar.h> int wcswidth( const wchar_t *pwcs, size_t n); STANDARDS
Interfaces documented on this reference page conform to industry standards as follows: wcswidth(): XSH5.0 Refer to the standards(5) reference page for more information about industry standards and associated tags. PARAMETERS
Contains a pointer to the wide-character string. Specifies the maximum number of wide characters whose display width is to be determined. DESCRIPTION
The wcswidth() function determines the number of display columns to be occupied by the number of wide characters specified by the n parame- ter in the string pointed to by the pwcs parameter. The behavior of the wcswidth() function is affected by the LC_CTYPE category. Fewer than the number of wide characters specified by the n parameter are counted if a null wide character is encountered first. EXAMPLES
The following example finds the display column width of a wide-character string: #include <wchar.h> #include <locale.h> main() { wchar_t *pwcs; int retval, n ; (void)setlocale(LC_ALL, ""); /* Let pwcs point to a wide-character null-terminated ** string. Let n be the number of wide characters whose ** display column width is to be determined. */ retval= wcswidth( pwcs, n ); if(retval == -1){ /* Error handling. Invalid wide-character code ** encountered in the wide-character string pwcs. */ } } RETURN VALUES
The wcswidth() function returns the number of display columns to be occupied by the specified number of wide characters or (if a null wide character is encountered first) by the number of wide characters encountered before the null. The function returns a value of 0 (zero) if the pwcs parameter is a null pointer or a pointer to a null pointer (that is, if either pwcs or *pwcs is null. The function returns -1 if the pwcs parameter points to a nonprinting wide character. RELATED INFORMATION
Functions: mblen(3), wcslen(3), wcwidth(3) Standards: standards(5) delim off wcswidth(3)
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