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

       For an explanation of the terms used in this section, see attributes(7).
       ┌──────────────────────────────────────────────────────────────────────┬───────────────┬────────────────┐
       │ Interface                                                            │ Attribute     │ Value          │
       ├──────────────────────────────────────────────────────────────────────┼───────────────┼────────────────┤
       │ wcswidth()                                                           │ Thread safety │ MT-Safe locale │
       └──────────────────────────────────────────────────────────────────────┴───────────────┴────────────────┘

       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.

       POSIX.1-2001.

       Standard C library (libc, -lc)

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

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

       The wcswidth() function returns the number of column positions for the wide-character string s, truncated
       to at most length n.

iswprint(3), wcwidth(3)

Linux man-pages 6.9.1                              2024-05-02                                        wcswidth(3)

       POSIX.1-2008.

#define_XOPEN_SOURCE             /* See feature_test_macros(7) */
       #include<wchar.h>intwcswidth(constwchar_t*s,size_tn);