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comparison lcdtest/dispatch.c @ 12:5eaf832d57d0

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lcdtest program started, skeleton compiles
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 06 Apr 2018 06:15:11 +0000
parents
children 238a77db4134
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11:03017bfeb3ce 12:5eaf832d57d0
1 #include <ctype.h>
2 #include <stdio.h>
3 #include <string.h>
4 #include <strings.h>
5 #include <stdlib.h>
6
7 extern int cmd_wd();
8 extern int cmd_wi();
9 extern int cmd_wr();
10
11 extern int reset_pulse();
12
13 cmd_exit()
14 {
15 exit(0);
16 }
17
18 static struct cmdtab {
19 char *cmd;
20 int minargs;
21 int maxargs;
22 int (*func)();
23 } cmdtab[] = {
24 {"exit", 0, 0, cmd_exit},
25 {"quit", 0, 0, cmd_exit},
26 {"reset", 0, 0, reset_pulse},
27 {"wd", 1, 1, cmd_wd},
28 {"wi", 1, 1, cmd_wi},
29 {"wr", 2, 2, cmd_wr},
30 {0, 0, 0, 0}
31 };
32
33 dispatch_cmd(cmd)
34 char *cmd;
35 {
36 char *argv[10];
37 char *cp, **ap;
38 struct cmdtab *tp;
39
40 for (cp = cmd; isspace(*cp); cp++)
41 ;
42 if (!*cp || *cp == '#')
43 return(0);
44 argv[0] = cp;
45 while (*cp && !isspace(*cp))
46 cp++;
47 if (*cp)
48 *cp++ = '\0';
49 for (tp = cmdtab; tp->cmd; tp++)
50 if (!strcmp(tp->cmd, argv[0]))
51 break;
52 if (!tp->func) {
53 fprintf(stderr, "error: no such command\n");
54 return(-1);
55 }
56 for (ap = argv + 1; ; ) {
57 while (isspace(*cp))
58 cp++;
59 if (!*cp || *cp == '#')
60 break;
61 if (ap - argv - 1 >= tp->maxargs) {
62 fprintf(stderr, "error: too many arguments\n");
63 return(-1);
64 }
65 *ap++ = cp;
66 while (*cp && !isspace(*cp))
67 cp++;
68 if (*cp)
69 *cp++ = '\0';
70 }
71 if (ap - argv - 1 < tp->minargs) {
72 fprintf(stderr, "error: too few arguments\n");
73 return(-1);
74 }
75 *ap = 0;
76 return tp->func(ap - argv, argv);
77 }