NAME
wcwidth - determine columns needed for a wide character SYNOPSIS
#define XOPENSOURCE /* See featuretestmacros(7) */
#include
int wcwidth(wchart 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 attributes(7). ┌──────────┬───────────────┬────────────────┐ │Interface │ Attribute │ Value │ ├──────────┼───────────────┼────────────────┤
│wcwidth() │ Thread safety │ MT-Safe locale │ └──────────┴───────────────┴────────────────┘ CONFORMING TO
POSIX.1-2001. Note that glibc before 2.2.5 used the prototype int wcwidth(wintt c); NOTES The behavior of wcwidth() depends on the LCCTYPE category of the cur‐ rent locale. SEE ALSO iswprint(3), wcswidth(3) COLOPHON
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GNU 2011-09-28 WCWIDTH(3)