Add ncurses 6.4

third_party/ncurses/fifo_defs.h

@@ -0,0 +1,86 @@
+/****************************************************************************
+ * Copyright 2020 Thomas E. Dickey                                          *
+ * Copyright 1998-2012,2016 Free Software Foundation, Inc.                  *
+ *                                                                          *
+ * Permission is hereby granted, free of charge, to any person obtaining a  *
+ * copy of this software and associated documentation files (the            *
+ * "Software"), to deal in the Software without restriction, including      *
+ * without limitation the rights to use, copy, modify, merge, publish,      *
+ * distribute, distribute with modifications, sublicense, and/or sell       *
+ * copies of the Software, and to permit persons to whom the Software is    *
+ * furnished to do so, subject to the following conditions:                 *
+ *                                                                          *
+ * The above copyright notice and this permission notice shall be included  *
+ * in all copies or substantial portions of the Software.                   *
+ *                                                                          *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
+ * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
+ * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
+ *                                                                          *
+ * Except as contained in this notice, the name(s) of the above copyright   *
+ * holders shall not be used in advertising or otherwise to promote the     *
+ * sale, use or other dealings in this Software without prior written       *
+ * authorization.                                                           *
+ ****************************************************************************/
+
+/****************************************************************************
+ *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
+ *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
+ ****************************************************************************/
+
+/*
+ * Common macros for lib_getch.c, lib_ungetch.c
+ *
+ * $Id: fifo_defs.h,v 1.9 2020/02/02 23:34:34 tom Exp $
+ */
+
+#ifndef FIFO_DEFS_H
+#define FIFO_DEFS_H 1
+
+#define head	sp->_fifohead
+#define tail	sp->_fifotail
+/* peek points to next uninterpreted character */
+#define peek	sp->_fifopeek
+
+#define h_inc() { \
+	    (head >= FIFO_SIZE-1) \
+		? head = 0 \
+		: head++; \
+	    if (head == tail) \
+		head = -1, tail = 0; \
+	}
+#define h_dec() { \
+	    (head <= 0) \
+		? head = FIFO_SIZE-1 \
+		: head--; \
+	    if (head == tail) \
+		tail = -1; \
+	}
+#define t_inc() { \
+	    (tail >= FIFO_SIZE-1) \
+		? tail = 0 \
+		: tail++; \
+	    if (tail == head) \
+		tail = -1; \
+	    }
+#define t_dec() { \
+	    (tail <= 0) \
+		? tail = FIFO_SIZE-1 \
+		: tail--; \
+	    if (head == tail) \
+		fifo_clear(sp); \
+	    }
+#define p_inc() { \
+	    (peek >= FIFO_SIZE-1) \
+		? peek = 0 \
+		: peek++; \
+	    }
+
+#define cooked_key_in_fifo()	((head >= 0) && (peek != head))
+#define raw_key_in_fifo()	((head >= 0) && (peek != tail))
+
+#endif /* FIFO_DEFS_H */