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RedHat 9 (Linux i386) - man page for btowc (redhat section 3)

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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.

CONFORMING TO
       ISO/ANSI C, UNIX98

SEE ALSO
       mbtowc(3)

NOTES
       The behaviour 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 the function
       mbtowc instead.

GNU					    1999-07-25					 BTOWC(3)
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