freebsd man page for ungetwc

UNGETWC(3)						   BSD Library Functions Manual 						UNGETWC(3)

NAME
     ungetwc -- un-get wide character from input stream

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <stdio.h>
     #include <wchar.h>

     wint_t
     ungetwc(wint_t wc, FILE *stream);

DESCRIPTION
     The ungetwc() function pushes the wide character wc (converted to an wchar_t) back onto the input stream pointed to by stream.  The pushed-
     backed wide characters will be returned by subsequent reads on the stream (in reverse order).  A successful intervening call, using the same
     stream, to one of the file positioning functions fseek(3), fsetpos(3), or rewind(3) will discard the pushed back wide characters.

     One wide character of push-back is guaranteed, but as long as there is sufficient memory, an effectively infinite amount of pushback is
     allowed.

     If a character is successfully pushed-back, the end-of-file indicator for the stream is cleared.

RETURN VALUES
     The ungetwc() function returns the wide character pushed-back after the conversion, or WEOF if the operation fails.  If the value of the
     argument c character equals WEOF, the operation will fail and the stream will remain unchanged.

SEE ALSO
     fseek(3), getwc(3)

STANDARDS
     The ungetwc() function conforms to ISO/IEC 9899:1999 (``ISO C99'').

BSD
								   March 3, 2004							       BSD