table of contents
other sections
wcwidth(3) | Library Functions Manual | wcwidth(3) |
NAME¶
wcwidth - determine columns needed for a wide character
LIBRARY¶
Standard C library (libc, -lc)
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'\0'), 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 |
STANDARDS¶
POSIX.1-2008.
HISTORY¶
POSIX.1-2001.
Note that before glibc 2.2.5, glibc 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¶
2023-03-30 | Linux man-pages 6.04 |