FreeCalypso > hg > freecalypso-hwlab

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