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root/radiance/ray/src/rt/editline.c
Revision: 2.8
Committed: Tue Mar 30 16:13:01 2004 UTC (20 years ago) by schorsch
Content type: text/plain
Branch: MAIN
CVS Tags: rad3R7P2, rad3R7P1, rad4R1, rad4R0, rad3R6, rad3R6P1, rad3R8, rad3R9
Changes since 2.7: +8 -6 lines
Log Message:
Continued ANSIfication. There are only bits and pieces left now.

File Contents

# Content
1 #ifndef lint
2 static const char RCSid[] = "$Id: editline.c,v 2.7 2003/07/27 22:12:03 schorsch Exp $";
3 #endif
4 /*
5 * editline.c - routine for editing raw input for rview.
6 *
7 * External symbols declared in driver.h
8 */
9
10 #include "copyright.h"
11
12 #include <stdio.h>
13 #include <string.h>
14
15 #include "color.h"
16
17 #include "driver.h"
18
19 #define iscntrl(c) ((c) < ' ')
20 #define isblank(c) ((c) == ' ')
21 #define iserase(c) ((c) == '\b' || (c) == 127)
22 #define iswerase(c) ((c) == 'W'-'@')
23 #define iskill(c) ((c) == 'U'-'@' || (c) == 'X'-'@')
24
25
26 extern void
27 editline( /* edit input line */
28 char *buf,
29 dr_getchf_t *c_get,
30 dr_comoutf_t *s_put
31 )
32 {
33 static char erases[] = "\b \b";
34 static char obuf[4];
35 register int i;
36 register int c;
37
38 i = 0;
39 while ((c = (*c_get)()&0177) != '\n' && c != '\r')
40 if (iserase(c)) { /* single char erase */
41 if (i > 0) {
42 (*s_put)(erases);
43 --i;
44 }
45 } else if (iswerase(c)) { /* word erase */
46 while (i > 0 && isblank(buf[i-1])) {
47 (*s_put)(erases);
48 --i;
49 }
50 while (i > 0 && !isblank(buf[i-1])) {
51 (*s_put)(erases);
52 --i;
53 }
54 } else if (iskill(c)) { /* kill line */
55 while (i > 0) {
56 (*s_put)(erases);
57 --i;
58 }
59 } else if (iscntrl(c)) { /* control char */
60 i = 0;
61 buf[i++] = c;
62 obuf[0] = '^'; obuf[1] = c|0100; obuf[2] = '\0';
63 (*s_put)(obuf);
64 break;
65 } else { /* regular char */
66 buf[i++] = c;
67 obuf[0] = c; obuf[1] = '\0';
68 (*s_put)(obuf);
69 }
70 buf[i] = '\0';
71 (*s_put)("\n");
72 }
73
74
75 static char mybuf[512];
76
77
78 void
79 tocombuf(b, d) /* add command(s) to my buffer */
80 register char *b;
81 register struct driver *d;
82 {
83 register char *cp;
84 char *comstart;
85
86 for (cp = mybuf; *cp; cp++)
87 ;
88 comstart = cp;
89 while ( (*cp++ = *b) )
90 if (cp >= mybuf+sizeof(mybuf)) {
91 *comstart = '\0';
92 return; /* what should I do about this? */
93 } else if (*b++ == '\n') {
94 d->inpready++;
95 comstart = cp;
96 }
97 }
98
99
100 int
101 fromcombuf(b, d) /* get command from my buffer */
102 char *b;
103 struct driver *d;
104 {
105 register char *cp;
106 /* get next command */
107 for (cp = mybuf; *cp != '\n'; cp++)
108 if (!*cp)
109 return(0);
110 *cp++ = '\0';
111 #ifdef DEBUG
112 (*d->comout)(mybuf); /* echo my command */
113 (*d->comout)("\n");
114 #endif
115 /* send it as reply */
116 strcpy(b, mybuf);
117 d->inpready--;
118 /* advance commands */
119 strcpy(mybuf, cp);
120 return(1);
121 }