2004-11-03 13:51:07 +00:00
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.\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
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.\"
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.\" This is free documentation; you can redistribute it and/or
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.\" modify it under the terms of the GNU General Public License as
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.\" published by the Free Software Foundation; either version 2 of
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.\" the License, or (at your option) any later version.
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.\"
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.\" References consulted:
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.\" GNU glibc-2 source code and manual
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.\" Dinkumware C library reference http://www.dinkumware.com/
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intro.1, time.1, accept.2, bind.2, connect.2, execve.2, flock.2, getdents.2, getpriority.2, getuid.2, intro.2, ioctl.2, mincore.2, mknod.2, personality.2, ptrace.2, read.2, recv.2, select_tut.2, send.2, sendfile.2, shmctl.2, sigaction.2, signal.2, stat.2, times.2, truncate.2, umask.2, wait.2, MB_CUR_MAX.3, MB_LEN_MAX.3, argz_add.3, btowc.3, clearenv.3, clock.3, cmsg.3, end.3, endian.3, errno.3, exit.3, fgetwc.3, fgetws.3, fopen.3, fputwc.3, fputws.3, fseek.3, fwide.3, getfsent.3, getgrnam.3, gethostid.3, getipnodebyname.3, getmntent.3, getpwnam.3, getwchar.3, grantpt.3, iconv.3, iconv_close.3, iconv_open.3, insque.3, intro.3, iswalnum.3, iswalpha.3, iswblank.3, iswcntrl.3, iswctype.3, iswdigit.3, iswgraph.3, iswlower.3, iswprint.3, iswpunct.3, iswspace.3, iswupper.3, iswxdigit.3, malloc.3, mblen.3, mbrlen.3, mbrtowc.3, mbsinit.3, mbsnrtowcs.3, mbsrtowcs.3, mbstowcs.3, mbtowc.3, mkstemp.3, mktemp.3, nl_langinfo.3, openpty.3, posix_openpt.3, printf.3, ptsname.3, putwchar.3, qecvt.3, rcmd.3, readdir.3, rexec.3, rpc.3, setnetgrent.3, shm_open.3, sigpause.3, stdin.3, stpcpy.3, strftime.3, strptime.3, syslog.3, towctrans.3, towlower.3, towupper.3, ttyslot.3, ungetwc.3, unlocked_stdio.3, wcpcpy.3, wcpncpy.3, wcrtomb.3, wcscasecmp.3, wcscat.3, wcschr.3, wcscmp.3, wcscpy.3, wcscspn.3, wcsdup.3, wcslen.3, wcsncasecmp.3, wcsncat.3, wcsncmp.3, wcsncpy.3, wcsnlen.3, wcsnrtombs.3, wcspbrk.3, wcsrchr.3, wcsrtombs.3, wcsspn.3, wcsstr.3, wcstok.3, wcstombs.3, wcswidth.3, wctob.3, wctomb.3, wctrans.3, wctype.3, wcwidth.3, wmemchr.3, wmemcmp.3, wmemcpy.3, wmemmove.3, wmemset.3, wprintf.3, console_ioctl.4, pts.4, elf.5, filesystems.5, hosts.5, proc.5, ttytype.5, boot.7, capabilities.7, credentials.7, epoll.7, glob.7, koi8-r.7, path_resolution.7, pty.7, signal.7, suffixes.7, time.7, unicode.7, unix.7, uri.7, utf-8.7: global fix: s/Unix/UNIX/
The man pages were rather inconsistent in the use of "Unix"
versus "UNIX". Let's go with the trademark usage.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2010-10-12 04:45:38 +00:00
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.\" OpenGroup's Single UNIX specification http://www.UNIX-systems.org/online.html
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2004-11-03 13:51:07 +00:00
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.\" ISO/IEC 9899:1999
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.\"
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.TH UNGETWC 3 1999-09-19 "GNU" "Linux Programmer's Manual"
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.SH NAME
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ungetwc \- push back a wide character onto a FILE stream
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.SH SYNOPSIS
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.nf
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.B #include <wchar.h>
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.sp
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.BI "wint_t ungetwc(wint_t " wc ", FILE *" stream );
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.fi
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.SH DESCRIPTION
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2007-05-12 09:06:04 +00:00
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The
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.BR ungetwc ()
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function is the wide-character equivalent of the
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2007-06-14 06:25:37 +00:00
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.BR ungetc (3)
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2007-04-12 22:42:49 +00:00
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function.
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It pushes back a wide character onto \fIstream\fP and returns it.
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2004-11-03 13:51:07 +00:00
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.PP
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2007-07-10 19:50:57 +00:00
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If \fIwc\fP is \fBWEOF\fP, it returns \fBWEOF\fP.
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2007-04-12 22:42:49 +00:00
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If \fIwc\fP is an invalid wide character,
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2007-07-10 19:50:57 +00:00
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it sets \fIerrno\fP to \fBEILSEQ\fP and returns \fBWEOF\fP.
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2004-11-03 13:51:07 +00:00
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.PP
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If \fIwc\fP is a valid wide character, it is pushed back onto the stream
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2007-04-24 19:40:35 +00:00
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and thus becomes available for future wide-character read operations.
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2007-04-12 22:42:49 +00:00
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The file-position indicator is decremented by one or more.
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The end-of-file
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indicator is cleared.
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The backing storage of the file is not affected.
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2004-11-03 13:51:07 +00:00
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.PP
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2007-04-24 19:40:35 +00:00
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Note: \fIwc\fP need not be the last wide-character read from the stream;
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2004-11-03 13:51:07 +00:00
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it can be any other valid wide character.
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.PP
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If the implementation supports multiple push-back operations in a row, the
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pushed-back wide characters will be read in reverse order; however, only one
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level of push-back is guaranteed.
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.SH "RETURN VALUE"
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2007-05-12 09:06:04 +00:00
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The
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.BR ungetwc ()
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2007-07-10 19:50:57 +00:00
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function returns \fIwc\fP when successful, or \fBWEOF\fP upon
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2004-11-03 13:51:07 +00:00
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failure.
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.SH "CONFORMING TO"
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2006-12-16 22:11:08 +00:00
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C99.
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2004-11-03 13:51:07 +00:00
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.SH NOTES
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2007-06-08 09:56:56 +00:00
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The behavior of
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2007-05-12 09:06:04 +00:00
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.BR ungetwc ()
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2007-06-22 18:25:23 +00:00
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depends on the
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.B LC_CTYPE
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category of the
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current locale.
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2007-05-16 18:25:50 +00:00
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.SH "SEE ALSO"
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.BR fgetwc (3)
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