btowc(3) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | CONFORMING TO | NOTES | SEE ALSO | COLOPHON

BTOWC(3)                Linux Programmer's Manual               BTOWC(3)

NAME         top

       btowc - convert single byte to wide character

SYNOPSIS         top

       #include <wchar.h>

       wint_t btowc(int c);

DESCRIPTION         top

       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         top

       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         top

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

       ┌──────────────────────────────────────┬───────────────┬─────────┐
       │Interface                             Attribute     Value   │
       ├──────────────────────────────────────┼───────────────┼─────────┤
       │btowc()                               │ Thread safety │ MT-Safe │
       └──────────────────────────────────────┴───────────────┴─────────┘

CONFORMING TO         top

       POSIX.1-2001, POSIX.1-2008, C99.

NOTES         top

       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         top

       mbrtowc(3), mbtowc(3), wctob(3)

COLOPHON         top

       This page is part of release 5.13 of the Linux man-pages project.
       A description of the project, information about reporting bugs,
       and the latest version of this page, can be found at
       https://www.kernel.org/doc/man-pages/.

GNU                            2021-03-22                       BTOWC(3)

Pages that refer to this page: wctob(3)wprintf(3)