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wcwidth_l(3) [osx man page]

WCWIDTH(3)						   BSD Library Functions Manual 						WCWIDTH(3)

wcwidth, wcwidth_l -- number of column positions of a wide-character code LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <wchar.h> int wcwidth(wchar_t wc); #include <wchar.h> #include <xlocale.h> int wcwidth_l(wchar_t wc, locale_t loc); DESCRIPTION
The wcwidth() function determines the number of column positions required to display the wide character wc. Although the wcwidth() function uses the current locale, the wcwidth_l() function may be passed a locale directly. See xlocale(3) for more information. RETURN VALUES
The wcwidth() function returns 0 if the wc argument is a null wide character (L''), -1 if wc is not printable; otherwise, it returns the number of column positions the character occupies. EXAMPLES
This code fragment reads text from standard input and breaks lines that are more than 20 column positions wide, similar to the fold(1) util- ity: wint_t ch; int column, w; column = 0; while ((ch = getwchar()) != WEOF) { w = wcwidth(ch); if (w > 0 && column + w >= 20) { putwchar(L' '); column = 0; } putwchar(ch); if (ch == L' ') column = 0; else if (w > 0) column += w; } SEE ALSO
iswprint(3), wcswidth(3), xlocale(3) STANDARDS
The wcwidth() function conforms to IEEE Std 1003.1-2001 (``POSIX.1''). BSD
August 17, 2004 BSD

Check Out this Related Man Page

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

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 5.11 14 Aug 2002 wcwidth(3C)
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