Manpages - wcswidth.3

wcswidth - determine columns needed for a fixed-size wide-character string

  #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).

POSIX.1-2001, POSIX.1-2008.

The behavior of wcswidth*() depends on the *LC_CTYPE category of the current locale.

*iswprint*(3), *wcwidth*(3)

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