btowc(3)                   Library Functions Manual                   btowc(3)

NAME
       btowc - convert single byte to wide character

LIBRARY
       Standard C library (libc, -lc)

SYNOPSIS
       #include <wchar.h>

       wint_t btowc(int c);

DESCRIPTION
       The btowc() function converts c, interpreted as a multibyte sequence of
       length 1, starting in the initial shift state, to a wide character and
       returns it.  If c is EOF or not a valid multibyte sequence of length 1,
       the btowc() function returns WEOF.

RETURN VALUE
       The btowc() function returns the wide character converted from the
       single byte c.  If c is EOF or not a valid multibyte sequence of length
       1, it returns WEOF.

ATTRIBUTES
       For an explanation of the terms used in this section, see
       attributes(7).

       +--------------------------------------------+---------------+---------+
       |Interface                                   | Attribute     | Value   |
       +--------------------------------------------+---------------+---------+
       |btowc ()                                    | Thread safety | MT-Safe |
       +--------------------------------------------+---------------+---------+
STANDARDS
       C11, POSIX.1-2008.

HISTORY
       C99, POSIX.1-2001.

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

       This function should never be used.  It does not work for encodings
       which have state, and unnecessarily treats single bytes differently
       from multibyte sequences.  Use either mbtowc(3) or the thread-safe
       mbrtowc(3) instead.

SEE ALSO
       mbrtowc(3), mbtowc(3), wctob(3)

Linux man-pages 6.7               2023-10-31                          btowc(3)