Manpage of BTOWC
BTOWCSection: Linux Programmer's Manual (3)
NAMEbtowc - convert single byte to wide character
#include <wchar.h>wint_t btowc(int c);
DESCRIPTIONThe 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 EOFor not a valid multibyte sequence of length 1, the btowc() function returns WEOF.
RETURN VALUEThe btowc() function returns the wide character converted from the single byte c. If c is EOFor not a valid multibyte sequence of length 1, it returns WEOF.
ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7).
CONFORMING TOPOSIX.1-2001, POSIX.1-2008, C99.
NOTESThe behavior of btowc() depends on the LC_CTYPEcategory 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 ALSOmbrtowc(3), mbtowc(3), wctob(3)
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