xref: /dflybsd-src/usr.bin/window/wwgets.c (revision 86d7f5d305c6adaa56ff4582ece9859d73106103)
1*86d7f5d3SJohn Marino /*	@(#)wwgets.c	8.1 (Berkeley) 6/6/93	*/
2*86d7f5d3SJohn Marino /*	$NetBSD: wwgets.c,v 1.9 2003/08/07 11:17:40 agc Exp $	*/
3*86d7f5d3SJohn Marino 
4*86d7f5d3SJohn Marino /*
5*86d7f5d3SJohn Marino  * Copyright (c) 1983, 1993
6*86d7f5d3SJohn Marino  *	The Regents of the University of California.  All rights reserved.
7*86d7f5d3SJohn Marino  *
8*86d7f5d3SJohn Marino  * This code is derived from software contributed to Berkeley by
9*86d7f5d3SJohn Marino  * Edward Wang at The University of California, Berkeley.
10*86d7f5d3SJohn Marino  *
11*86d7f5d3SJohn Marino  * Redistribution and use in source and binary forms, with or without
12*86d7f5d3SJohn Marino  * modification, are permitted provided that the following conditions
13*86d7f5d3SJohn Marino  * are met:
14*86d7f5d3SJohn Marino  * 1. Redistributions of source code must retain the above copyright
15*86d7f5d3SJohn Marino  *    notice, this list of conditions and the following disclaimer.
16*86d7f5d3SJohn Marino  * 2. Redistributions in binary form must reproduce the above copyright
17*86d7f5d3SJohn Marino  *    notice, this list of conditions and the following disclaimer in the
18*86d7f5d3SJohn Marino  *    documentation and/or other materials provided with the distribution.
19*86d7f5d3SJohn Marino  * 3. Neither the name of the University nor the names of its contributors
20*86d7f5d3SJohn Marino  *    may be used to endorse or promote products derived from this software
21*86d7f5d3SJohn Marino  *    without specific prior written permission.
22*86d7f5d3SJohn Marino  *
23*86d7f5d3SJohn Marino  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24*86d7f5d3SJohn Marino  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25*86d7f5d3SJohn Marino  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26*86d7f5d3SJohn Marino  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27*86d7f5d3SJohn Marino  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28*86d7f5d3SJohn Marino  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29*86d7f5d3SJohn Marino  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30*86d7f5d3SJohn Marino  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31*86d7f5d3SJohn Marino  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32*86d7f5d3SJohn Marino  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33*86d7f5d3SJohn Marino  * SUCH DAMAGE.
34*86d7f5d3SJohn Marino  */
35*86d7f5d3SJohn Marino 
36*86d7f5d3SJohn Marino #include <string.h>
37*86d7f5d3SJohn Marino #include "ww.h"
38*86d7f5d3SJohn Marino #include "char.h"
39*86d7f5d3SJohn Marino 
40*86d7f5d3SJohn Marino static void rub(int, struct ww *);
41*86d7f5d3SJohn Marino 
42*86d7f5d3SJohn Marino void
wwgets(char * buf,int n,struct ww * w)43*86d7f5d3SJohn Marino wwgets(char *buf, int n, struct ww *w)
44*86d7f5d3SJohn Marino {
45*86d7f5d3SJohn Marino 	char *p = buf;
46*86d7f5d3SJohn Marino 	int c;
47*86d7f5d3SJohn Marino 	int uc = ISSET(w->ww_wflags, WWW_UNCTRL);
48*86d7f5d3SJohn Marino 
49*86d7f5d3SJohn Marino 	CLR(w->ww_wflags, WWW_UNCTRL);
50*86d7f5d3SJohn Marino 	for (;;) {
51*86d7f5d3SJohn Marino 		wwcurtowin(w);
52*86d7f5d3SJohn Marino 		while ((c = wwgetc()) < 0)
53*86d7f5d3SJohn Marino 			wwiomux();
54*86d7f5d3SJohn Marino #ifdef OLD_TTY
55*86d7f5d3SJohn Marino 		if (c == wwoldtty.ww_sgttyb.sg_erase)
56*86d7f5d3SJohn Marino #else
57*86d7f5d3SJohn Marino 		if (c == wwoldtty.ww_termios.c_cc[VERASE])
58*86d7f5d3SJohn Marino #endif
59*86d7f5d3SJohn Marino 		{
60*86d7f5d3SJohn Marino 			if (p > buf)
61*86d7f5d3SJohn Marino 				rub(*--p, w);
62*86d7f5d3SJohn Marino 		} else
63*86d7f5d3SJohn Marino #ifdef OLD_TTY
64*86d7f5d3SJohn Marino 		if (c == wwoldtty.ww_sgttyb.sg_kill)
65*86d7f5d3SJohn Marino #else
66*86d7f5d3SJohn Marino 		if (c == wwoldtty.ww_termios.c_cc[VKILL])
67*86d7f5d3SJohn Marino #endif
68*86d7f5d3SJohn Marino 		{
69*86d7f5d3SJohn Marino 			while (p > buf)
70*86d7f5d3SJohn Marino 				rub(*--p, w);
71*86d7f5d3SJohn Marino 		} else
72*86d7f5d3SJohn Marino #ifdef OLD_TTY
73*86d7f5d3SJohn Marino 		if (c == wwoldtty.ww_ltchars.t_werasc)
74*86d7f5d3SJohn Marino #else
75*86d7f5d3SJohn Marino 		if (c == wwoldtty.ww_termios.c_cc[VWERASE])
76*86d7f5d3SJohn Marino #endif
77*86d7f5d3SJohn Marino 		{
78*86d7f5d3SJohn Marino 			while (--p >= buf && (*p == ' ' || *p == '\t'))
79*86d7f5d3SJohn Marino 				rub(*p, w);
80*86d7f5d3SJohn Marino 			while (p >= buf && *p != ' ' && *p != '\t')
81*86d7f5d3SJohn Marino 				rub(*p--, w);
82*86d7f5d3SJohn Marino 			p++;
83*86d7f5d3SJohn Marino 		} else if (c == '\r' || c == '\n') {
84*86d7f5d3SJohn Marino 			break;
85*86d7f5d3SJohn Marino 		} else {
86*86d7f5d3SJohn Marino 			if (p >= buf + n - 1)
87*86d7f5d3SJohn Marino 				wwputc(ctrl('g'), w);
88*86d7f5d3SJohn Marino 			else
89*86d7f5d3SJohn Marino 				wwputs(unctrl(*p++ = c), w);
90*86d7f5d3SJohn Marino 		}
91*86d7f5d3SJohn Marino 	}
92*86d7f5d3SJohn Marino 	*p = 0;
93*86d7f5d3SJohn Marino 	SET(w->ww_wflags, uc);
94*86d7f5d3SJohn Marino }
95*86d7f5d3SJohn Marino 
96*86d7f5d3SJohn Marino static void
rub(int c,struct ww * w)97*86d7f5d3SJohn Marino rub(int c, struct ww *w)
98*86d7f5d3SJohn Marino {
99*86d7f5d3SJohn Marino 	int i;
100*86d7f5d3SJohn Marino 
101*86d7f5d3SJohn Marino 	for (i = strlen(unctrl(c)); --i >= 0;)
102*86d7f5d3SJohn Marino 		(void) wwwrite(w, "\b \b", 3);
103*86d7f5d3SJohn Marino }
104