.\" Copyright (C) 2001 Information-technology Promotion Agency (IPA)
.\" Copyright (C) 2001-2003
.\"   National Institute of Advanced Industrial Science and Technology (AIST)
.\" This file si aprt of the m17n library documentation.
.\" Permission is granted to copy, distribute and/or modify this document
.\" under the terms of the GNU Free Documentation License, Version 1.2 or
.\" any later version published by the Free Software Foundation; with no
.\" Invariant Section, Front-Cover Texts "The m17n library documentation",
.\" and no Back-Cover Texts.  A copy of the license is included in the
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.TH "mconv_ungetc" 3m17n "14 Jul 2007" "" "Version 1.4.0" "" "The m17n Library" \" -*- nroff -*-
.ad l
.nh
.SH NAME
mconv_ungetc - Push a character back to a code converter. 


.SH SYNOPSIS
int
\fBmconv_ungetc\fP (\fBMConverter\fP *
\fIconverter\fP, int
\fIc\fP)


.SH DESCRIPTION
The
.ft B
mconv_ungetc()
.ft R
function pushes character
.ft B
c
.ft R
back to code converter
.ft B
converter\fP.
.ft R
Any number of characters can be pushed back. The lastly pushed back character is firstly read by the subsequent
.ft B
mconv_getc()
.ft R
call. The characters pushed back are registered only in
.ft B
converter\fP;
.ft R
they are not written to the input source. The internal status of
.ft B
converter
.ft R
is updated appropriately.
.PP
.SH RETURN VALUE
.PP.RS 4
If the operation was successful,
.ft B
mconv_ungetc()
.ft R
returns
.ft B
c\fP.
.ft R
Otherwise it returns
.ft C
EOF
.ft R
and assigns an error code to the external variable
.ft B
merror_code\fP.
.ft R
.RE
.PP
.SH ERRORS
.PP.RS 4
\fCMERROR_CODING\fP,
.ft R
.ft C
MERROR_CHAR
.ft R
.RE
.PP
.SH "SEE ALSO"
.PP.RS 4
\fBmconv_getc()\fP,
.ft R
.ft B
mconv_putc()\fP,
.ft R
.ft B
mconv_gets()
.ft R
.RE
.PP