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Linux 2.6 - man page for btowc (linux section 3)

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
       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
       This page is part of release 3.55 of the Linux man-pages project.  A  description  of  the
       project,     and    information	  about    reporting	bugs,	 can	be    found    at
       http://www.kernel.org/doc/man-pages/.

GNU					    2011-09-22					 BTOWC(3)


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