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wcswidth(3) Library Functions Manual wcswidth(3)
wcswidth - determine columns needed for a fixed-size wide- character string
Standard C library (libc, -lc)
#define _XOPEN_SOURCE /* See feature_test_macros(7) */ #include <wchar.h> int wcswidth(const wchar_t *s, size_t n);
The wcswidth() function returns the number of columns needed to represent the wide-character string pointed to by s, but at most n wide characters. If a nonprintable wide character occurs among these characters, -1 is returned.
The wcswidth() function returns the number of column positions for the wide-character string s, truncated to at most length n.
For an explanation of the terms used in this section, see attributes(7). ┌──────────────────────────────┬───────────────┬────────────────┐ │ Interface │ Attribute │ Value │ ├──────────────────────────────┼───────────────┼────────────────┤ │ wcswidth() │ Thread safety │ MT-Safe locale │ └──────────────────────────────┴───────────────┴────────────────┘
POSIX.1-2008.
POSIX.1-2001.
The behavior of wcswidth() depends on the LC_CTYPE category of the current locale.
iswprint(3), wcwidth(3)
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Linux man-pages 6.9.1 2024-05-02 wcswidth(3)
Pages that refer to this page: wcwidth(3), utf-8(7)