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BTOWC(3) Linux Programmer's Manual BTOWC(3)
NAME
btowc - convert single byte to wide character
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 │
└──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┴───────────────┴─────────┘
CONFORMING TO
POSIX.1-2001, POSIX.1-2008, C99.
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)
GNU 2021-03-22 BTOWC(3)