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UNGETWC(3)		   Linux Programmer's Manual		    UNGETWC(3)

       ungetwc - push back a wide character onto a FILE stream

       #include <wchar.h>

       wint_t ungetwc(wint_t wc, FILE *stream);

       The   ungetwc()	function  is  the  wide-character  equivalent  of  the
       ungetc(3) function.  It pushes back a wide character  onto  stream  and
       returns it.

       If wc is WEOF, it returns WEOF.	If wc is an invalid wide character, it
       sets errno to EILSEQ and returns WEOF.

       If wc is a valid wide character, it is pushed back onto the stream  and
       thus  becomes available for future wide-character read operations.  The
       file-position indicator is decremented by one or more.  The end-of-file
       indicator is cleared.  The backing storage of the file is not affected.

       Note:  wc  need not be the last wide-character read from the stream; it
       can be any other valid wide character.

       If the implementation supports multiple push-back operations in a  row,
       the pushed-back wide characters will be read in reverse order; however,
       only one level of push-back is guaranteed.

       The ungetwc() function returns wc when successful, or WEOF  upon	 fail‐


       The  behavior of ungetwc() depends on the LC_CTYPE category of the cur‐
       rent locale.


       This page is part of release 3.22 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				  1999-09-19			    UNGETWC(3)

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