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 sin- gle 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 at- tributes(7). ┌────────────────────────────────────────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├────────────────────────────────────────────┼───────────────┼─────────┤ │btowc() │ Thread safety │ MT-Safe │ └────────────────────────────────────────────┴───────────────┴─────────┘ STANDARDS 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 mbr- towc(3) instead. SEE ALSO mbrtowc(3), mbtowc(3), wctob(3) Linux man-pages 6.03 2022-12-15 btowc(3)
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