Manpage of WCSWIDTH
WCSWIDTHSection: Linux Programmer's Manual (3)
NAMEwcswidth - 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);
DESCRIPTIONThe wcswidth() function returns the number of columns needed to represent the wide-character string pointed to by s, but at most nwide characters. If a nonprintable wide character occurs among these characters, -1 is returned.
RETURN VALUEThe wcswidth() function returns the number of column positions for the wide-character string s, truncated to at most length n.
ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7).
|wcswidth()||Thread safety||MT-Safe locale|
CONFORMING TOPOSIX.1-2001, POSIX.1-2008.
NOTESThe behavior of wcswidth() depends on the LC_CTYPEcategory of the current locale.
SEE ALSOiswprint(3), wcwidth(3)
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