Mac Developer Library Developer


This manual page is part of Xcode Tools version 5.0

To obtain these tools:

If you are running a version of Xcode Tools other than 5.0, view the documentation locally:

  • In Xcode

  • In Terminal, using the man(1) command

Reading manual pages

Manual pages are intended as a quick reference for people who already understand a technology.

  • To learn how the manual is organized or to learn about command syntax, read the manual page for manpages(5).

  • For more information about this technology, look for other documentation in the Apple Developer Library.

  • For general information about writing shell scripts, read Shell Scripting Primer.

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

     wcswidth, wcswidth_l -- number of column positions in wide-character string

     Standard C Library (libc, -lc)

     #include <wchar.h>

     wcswidth(const wchar_t *pwcs, size_t n);

     #include <wchar.h>
     #include <xlocale.h>

     wcswidth_l(const wchar_t *pwcs, size_t n, locale_t loc);

     The wcswidth() function determines the number of column positions required for the first n characters
     of pwcs, or until a null wide character (L'\0') 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.

     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.

     iswprint(3), wcwidth(3), xlocale(3)

     The wcswidth() function conforms to IEEE Std 1003.1-2001 (``POSIX.1'').

BSD                             August 20, 2002                            BSD

Reporting Problems

The way to report a problem with this manual page depends on the type of problem:

Content errors
Report errors in the content of this documentation with the feedback links below.
Bug reports
Report bugs in the functionality of the described tool or API through Bug Reporter.
Formatting problems
Report formatting mistakes in the online version of these pages with the feedback links below.