1 /****************************************************************************
2 * Copyright (c) 1998-2008,2012 Free Software Foundation, Inc. *
4 * Permission is hereby granted, free of charge, to any person obtaining a *
5 * copy of this software and associated documentation files (the *
6 * "Software"), to deal in the Software without restriction, including *
7 * without limitation the rights to use, copy, modify, merge, publish, *
8 * distribute, distribute with modifications, sublicense, and/or sell *
9 * copies of the Software, and to permit persons to whom the Software is *
10 * furnished to do so, subject to the following conditions: *
12 * The above copyright notice and this permission notice shall be included *
13 * in all copies or substantial portions of the Software. *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
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27 ****************************************************************************/
29 /****************************************************************************
30 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
31 * and: Eric S. Raymond <esr@snark.thyrsus.com> *
32 ****************************************************************************/
35 * Common macros for lib_getch.c, lib_ungetch.c
37 * $Id: fifo_defs.h,v 1.7 2012/08/04 15:59:17 tom Exp $
43 #define head sp->_fifohead
44 #define tail sp->_fifotail
45 /* peek points to next uninterpreted character */
46 #define peek sp->_fifopeek
49 (head >= FIFO_SIZE-1) \
53 head = -1, tail = 0; \
57 ? head = FIFO_SIZE-1 \
63 (tail >= FIFO_SIZE-1) \
71 ? tail = FIFO_SIZE-1 \
77 (peek >= FIFO_SIZE-1) \
82 #define cooked_key_in_fifo() ((head >= 0) && (peek != head))
83 #define raw_key_in_fifo() ((head >= 0) && (peek != tail))
87 #endif /* FIFO_DEFS_H */