btowc(3) — Linux manual page

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)

COLOPHON

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

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

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