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//===========================================================================
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//
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// ungetc.cxx
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//
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// ANSI Stdio ungetc() function
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//
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//===========================================================================
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//####ECOSGPLCOPYRIGHTBEGIN####
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// -------------------------------------------
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// This file is part of eCos, the Embedded Configurable Operating System.
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// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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//
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// eCos is free software; you can redistribute it and/or modify it under
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// the terms of the GNU General Public License as published by the Free
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// Software Foundation; either version 2 or (at your option) any later version.
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//
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// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with eCos; if not, write to the Free Software Foundation, Inc.,
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// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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//
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// As a special exception, if other files instantiate templates or use macros
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// or inline functions from this file, or you compile this file and link it
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// with other works to produce a work based on this file, this file does not
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// by itself cause the resulting work to be covered by the GNU General Public
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// License. However the source code for this file must still be made available
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// in accordance with section (3) of the GNU General Public License.
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//
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// This exception does not invalidate any other reasons why a work based on
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// this file might be covered by the GNU General Public License.
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//
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// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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// at http://sources.redhat.com/ecos/ecos-license/
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// -------------------------------------------
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//####ECOSGPLCOPYRIGHTEND####
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//===========================================================================
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//#####DESCRIPTIONBEGIN####
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//
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// Author(s): jlarmour
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// Contributors:
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// Date: 2000-04-20
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// Purpose:
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// Description:
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// Usage:
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//
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//####DESCRIPTIONEND####
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//
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//===========================================================================
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// CONFIGURATION
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#include <pkgconf/libc_stdio.h> // Configuration header
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// INCLUDES
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#include <cyg/infra/cyg_type.h> // Common project-wide type definitions
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#include <stddef.h> // NULL and size_t from compiler
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#include <stdio.h> // header for this file
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#include <errno.h> // error codes
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#include <cyg/libc/stdio/stream.hxx> // Cyg_StdioStream
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// FUNCTIONS
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externC int
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ungetc( int c, FILE *stream )
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{
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Cyg_StdioStream *real_stream = (Cyg_StdioStream *)stream;
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Cyg_ErrNo err;
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cyg_uint8 real_c;
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if (c == EOF)
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return EOF;
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real_c = (cyg_uint8) c;
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err = real_stream->unread_byte( real_c );
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if (err)
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{
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errno = err;
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return EOF;
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} // if
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return (int)real_c;
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} // ungetc()
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// EOF ungetc.cxx
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