WCWIDTH(3) Linux Programmer's Manual WCWIDTH(3) NAME wcwidth - determine columns needed for a wide character SYNOPSIS #define _XOPEN_SOURCE /* See feature_test_macros(7) */ #include <wchar.h> int wcwidth(wchar_t c); DESCRIPTION The wcwidth() function returns the number of columns needed to repre- sent the wide character c. If c is a printable wide character, the value is at least 0. If c is null wide character (L'\0'), the value is 0. Otherwise, -1 is returned. RETURN VALUE The wcwidth() function returns the number of column positions for c. ATTRIBUTES Multithreading (see pthreads(7)) The wcwidth() function is thread-safe with exceptions. It can be safely used in multithreaded applications, as long as setlocale(3) is not called to change the locale during its execution. CONFORMING TO POSIX.1-2001. Note that glibc before 2.2.5 used the prototype int wcwidth(wint_t c); NOTES The behavior of wcwidth() depends on the LC_CTYPE category of the cur- rent locale. SEE ALSO iswprint(3), wcswidth(3) COLOPHON This page is part of release 3.74 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at http://www.kernel.org/doc/man-pages/. GNU 2014-01-22 WCWIDTH(3)
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