*** UNIX MANUAL PAGE BROWSER ***

UNGETWC(3) FreeBSD Library Functions Manual UNGETWC(3) NAME ungetwc - un-get wide character from input stream 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 a 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), ungetc(3) STANDARDS The ungetwc() function conforms to ISO/IEC 9899:1999 ("ISO C99"). BUGS The current implementation uses a fixed sized ungetwc-buffer. FreeBSD 14.1-RELEASE-p8 February 2, 2021 FreeBSD 14.1-RELEASE-p8