lib_kernel.c revision 50276 
1/****************************************************************************
2 * Copyright (c) 1998 Free Software Foundation, Inc.                        *
3 *                                                                          *
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5 * copy of this software and associated documentation files (the            *
6 * "Software"), to deal in the Software without restriction, including      *
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9 * copies of the Software, and to permit persons to whom the Software is    *
10 * furnished to do so, subject to the following conditions:                 *
11 *                                                                          *
12 * The above copyright notice and this permission notice shall be included  *
13 * in all copies or substantial portions of the Software.                   *
14 *                                                                          *
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.   *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
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21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
22 *                                                                          *
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24 * holders shall not be used in advertising or otherwise to promote the     *
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28
29/****************************************************************************
30 *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
31 *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
32 ****************************************************************************/
33
34
35/*
36 *	lib_kernel.c
37 *
38 *	Misc. low-level routines:
39 *		erasechar()
40 *		killchar()
41 *		flushinp()
42 *
43 * The baudrate() and delay_output() functions could logically live here,
44 * but are in other modules to reduce the static-link size of programs
45 * that use only these facilities.
46 */
47
48#include <curses.priv.h>
49#include <term.h>	/* cur_term */
50
51MODULE_ID("$Id: lib_kernel.c,v 1.19 1998/12/20 00:18:45 tom Exp $")
52
53/*
54 *	erasechar()
55 *
56 *	Return erase character as given in cur_term->Ottyb.
57 *
58 */
59
60char
61erasechar(void)
62{
63	T((T_CALLED("erasechar()")));
64
65	if (cur_term != 0) {
66#ifdef TERMIOS
67		returnCode(cur_term->Ottyb.c_cc[VERASE]);
68#else
69		returnCode(cur_term->Ottyb.sg_erase);
70#endif
71	}
72	returnCode(ERR);
73}
74
75
76
77/*
78 *	killchar()
79 *
80 *	Return kill character as given in cur_term->Ottyb.
81 *
82 */
83
84char
85killchar(void)
86{
87	T((T_CALLED("killchar()")));
88
89	if (cur_term != 0) {
90#ifdef TERMIOS
91		returnCode(cur_term->Ottyb.c_cc[VKILL]);
92#else
93		returnCode(cur_term->Ottyb.sg_kill);
94#endif
95	}
96	returnCode(ERR);
97}
98
99
100
101/*
102 *	flushinp()
103 *
104 *	Flush any input on cur_term->Filedes
105 *
106 */
107
108int flushinp(void)
109{
110	T((T_CALLED("flushinp()")));
111
112	if (cur_term != 0) {
113#ifdef TERMIOS
114		tcflush(cur_term->Filedes, TCIFLUSH);
115#else
116		errno = 0;
117		do {
118		    ioctl(cur_term->Filedes, TIOCFLUSH, 0);
119		} while
120		    (errno == EINTR);
121#endif
122		if (SP) {
123			SP->_fifohead = -1;
124			SP->_fifotail = 0;
125			SP->_fifopeek = 0;
126		}
127		returnCode(OK);
128	}
129	returnCode(ERR);
130}
131