wcwidth(3) [php man page]
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 represent the wide character c. If c is a printable wide character, the value is at least 0. If c is null wide character (L' '), the value is 0. Otherwise, -1 is returned. RETURN VALUE
The wcwidth() function returns the number of column positions for c. ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7). +----------+---------------+----------------+ |Interface | Attribute | Value | +----------+---------------+----------------+ |wcwidth() | Thread safety | MT-Safe locale | +----------+---------------+----------------+ CONFORMING TO
POSIX.1-2001, POSIX.1-2008. 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 current locale. SEE ALSO
iswprint(3), wcswidth(3) COLOPHON
This page is part of release 4.15 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 https://www.kernel.org/doc/man-pages/. GNU
2017-09-15 WCWIDTH(3)
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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 represent the wide character c. If c is a printable wide character, the value is at least 0. If c is null wide character (L' '), the value is 0. Otherwise, -1 is returned. RETURN VALUE
The wcwidth() function returns the number of column positions for c. ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7). +----------+---------------+----------------+ |Interface | Attribute | Value | +----------+---------------+----------------+ |wcwidth() | Thread safety | MT-Safe locale | +----------+---------------+----------------+ CONFORMING TO
POSIX.1-2001, POSIX.1-2008. 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 current locale. SEE ALSO
iswprint(3), wcswidth(3) COLOPHON
This page is part of release 4.15 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 https://www.kernel.org/doc/man-pages/. GNU 2017-09-15 WCWIDTH(3)