Man Ungetwc en anglais
UNGETWC(3)                 Linux Programmer's Manual                UNGETWC(3)



 

NAME


       ungetwc - push back a wide character onto a FILE stream

 

SYNOPSIS


       #include 

       wint_t ungetwc(wint_t wc, FILE *stream);

 

DESCRIPTION






       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.

 

RETURN VALUE


       The  ungetwc()  function returns wc when successful, or WEOF upon fail-
       ure.

 

CONFORMING TO


       C99.

 

NOTES


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

 

SEE ALSO


       fgetwc(3)

 

COLOPHON


       This  page  is  part of release 3.05 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)