1 |
/* Copyright (c) 1987 Regents of the University of California */ |
2 |
|
3 |
#ifndef lint |
4 |
static char SCCSid[] = "$SunId$ LBL"; |
5 |
#endif |
6 |
|
7 |
/* |
8 |
* editline.c - routine for editing raw input for rview. |
9 |
* |
10 |
* 10/5/88 |
11 |
*/ |
12 |
|
13 |
#define iscntrl(c) ((c) < ' ') |
14 |
#define isblank(c) ((c) == ' ') |
15 |
#define iserase(c) ((c) == '\b' || (c) == 127) |
16 |
#define iswerase(c) ((c) == 'W'-'@') |
17 |
#define iskill(c) ((c) == 'U'-'@' || (c) == 'X'-'@') |
18 |
|
19 |
|
20 |
editline(buf, c_get, s_put) /* edit input line */ |
21 |
char *buf; |
22 |
int (*c_get)(), (*s_put)(); |
23 |
{ |
24 |
static char erases[] = "\b \b"; |
25 |
static char obuf[4]; |
26 |
register int i; |
27 |
register int c; |
28 |
|
29 |
i = 0; |
30 |
while ((c = (*c_get)()&0177) != '\n' && c != '\r') |
31 |
if (iserase(c)) { /* single char erase */ |
32 |
if (i > 0) { |
33 |
(*s_put)(erases); |
34 |
--i; |
35 |
} |
36 |
} else if (iswerase(c)) { /* word erase */ |
37 |
while (i > 0 && isblank(buf[i-1])) { |
38 |
(*s_put)(erases); |
39 |
--i; |
40 |
} |
41 |
while (i > 0 && !isblank(buf[i-1])) { |
42 |
(*s_put)(erases); |
43 |
--i; |
44 |
} |
45 |
} else if (iskill(c)) { /* kill line */ |
46 |
while (i > 0) { |
47 |
(*s_put)(erases); |
48 |
--i; |
49 |
} |
50 |
} else if (iscntrl(c)) { /* control char */ |
51 |
i = 0; |
52 |
buf[i++] = c; |
53 |
obuf[0] = '^'; obuf[1] = c|0100; obuf[2] = '\0'; |
54 |
(*s_put)(obuf); |
55 |
break; |
56 |
} else { /* regular char */ |
57 |
buf[i++] = c; |
58 |
obuf[0] = c; obuf[1] = '\0'; |
59 |
(*s_put)(obuf); |
60 |
} |
61 |
buf[i] = '\0'; |
62 |
(*s_put)("\n"); |
63 |
} |
64 |
|
65 |
|
66 |
#include "driver.h" |
67 |
|
68 |
static char mybuf[512]; |
69 |
|
70 |
|
71 |
tocombuf(b, d) /* add command(s) to my buffer */ |
72 |
register char *b; |
73 |
register struct driver *d; |
74 |
{ |
75 |
register char *cp; |
76 |
|
77 |
for (cp = mybuf; *cp; cp++) |
78 |
; |
79 |
while (*cp++ = *b) |
80 |
if (*b++ == '\n') |
81 |
d->inpready++; |
82 |
} |
83 |
|
84 |
|
85 |
fromcombuf(b, d) /* get command from my buffer */ |
86 |
char *b; |
87 |
struct driver *d; |
88 |
{ |
89 |
register char *cp; |
90 |
/* get next command */ |
91 |
for (cp = mybuf; *cp != '\n'; cp++) |
92 |
if (!*cp) |
93 |
return(0); |
94 |
*cp++ = '\0'; |
95 |
#ifdef DEBUG |
96 |
(*d->comout)(mybuf); /* echo my command */ |
97 |
(*d->comout)("\n"); |
98 |
#endif |
99 |
/* send it as reply */ |
100 |
strcpy(b, mybuf); |
101 |
d->inpready--; |
102 |
/* get next command */ |
103 |
strcpy(mybuf, cp); |
104 |
return(1); |
105 |
} |