определить столбцы, необходимые для широкого символа (determine columns needed for a wide character)
Имя (Name)
wcwidth - determine columns needed for a wide character
Синопсис (Synopsis)
#define _XOPEN_SOURCE /* See feature_test_macros(7) */
#include <wchar.h>
int wcwidth(wchar_t c);
Описание (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'\0'), the value is 0. Otherwise, -1 is returned.
Возвращаемое значение (Return value)
The wcwidth() function returns the number of column positions for
c.
Атрибуты (Attributes)
For an explanation of the terms used in this section, see
attributes(7).
┌───────────────────────────────┬───────────────┬────────────────┐
│Interface │ Attribute │ Value │
├───────────────────────────────┼───────────────┼────────────────┤
│wcwidth() │ Thread safety │ MT-Safe locale │
└───────────────────────────────┴───────────────┴────────────────┘
Стандарты (Conforming to)
POSIX.1-2001, POSIX.1-2008.
Note that glibc before 2.2.5 used the prototype
int wcwidth(wint_t c);
Примечание (Note)
The behavior of wcwidth() depends on the LC_CTYPE category of the
current locale.
Смотри также (See also)
iswprint(3), wcswidth(3)
