wcswidth(3) Library Functions Manual wcswidth(3) NAME wcswidth - determine columns needed for a fixed-size wide-character string LIBRARY Standard C library (libc, -lc) SYNOPSIS #define _XOPEN_SOURCE /* See feature_test_macros(7) */ #include <wchar.h> int wcswidth(const wchar_t *s, size_t n); DESCRIPTION The wcswidth() function returns the number of columns needed to repre- sent the wide-character string pointed to by s, but at most n wide characters. If a nonprintable wide character occurs among these char- acters, -1 is returned. RETURN VALUE The wcswidth() function returns the number of column positions for the wide-character string s, truncated to at most length n. ATTRIBUTES For an explanation of the terms used in this section, see at- tributes(7). ┌─────────────────────────────────────┬───────────────┬────────────────┐ │Interface │ Attribute │ Value │ ├─────────────────────────────────────┼───────────────┼────────────────┤ │wcswidth() │ Thread safety │ MT-Safe locale │ └─────────────────────────────────────┴───────────────┴────────────────┘ STANDARDS POSIX.1-2001, POSIX.1-2008. NOTES The behavior of wcswidth() depends on the LC_CTYPE category of the cur- rent locale. SEE ALSO iswprint(3), wcwidth(3) Linux man-pages 6.03 2022-12-15 wcswidth(3)
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