---
name: "mconv_ungetc"
section: "3m17n"
platform: "linux"
package: "m17n-docs"
version: "1.8.4-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/mconv_ungetc"
---

# mconv\_ungetc(3m17n)

## NAME

mconv\_ungetc -

## SYNOPSIS

int **mconv\_ungetc** (**MConverter** \* *converter*, int *c*)

## DESCRIPTION

Push a character back to a code converter. The **mconv\_ungetc()** function pushes character **c** back to code converter **converter**. Any number of characters can be pushed back. The lastly pushed back character is firstly read by the subsequent **mconv\_getc()** call. The characters pushed back are registered only in **converter**; they are not written to the input source. The internal status of **converter** is updated appropriately.

## RETURN VALUE

If the operation was successful, **mconv\_ungetc()** returns **c**. Otherwise it returns `EOF` and assigns an error code to the external variable **merror\_code**. \

## ERRORS

`MERROR_CODING`, `MERROR_CHAR`

## SEE ALSO

**mconv\_getc()**, **mconv\_putc()**, **mconv\_gets()**\

## COPYRIGHT

Copyright (C) 2001 Information-technology Promotion Agency (IPA)\
 Copyright (C) 2001-2011 National Institute of Advanced Industrial Science and Technology (AIST)\
 Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License  \<http://www.gnu.org/licenses/fdl.html\>.