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 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
For an explanation of the terms used in this section, see at-
tributes(7).
┌─────────────────────────────────────┬───────────────┬────────────────┐
│Interface │ Attribute │ Value │
├─────────────────────────────────────┼───────────────┼────────────────┤
│wcwidth() │ Thread safety │ MT-Safe locale │
└─────────────────────────────────────┴───────────────┴────────────────┘
STANDARDS
POSIX.1-2001, POSIX.1-2008.
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 cur-
rent locale.
SEE ALSO
iswprint(3), wcswidth(3)
Linux man-pages 6.03 2023-02-05 wcwidth(3)
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