FreeCalypso > hg > freecalypso-hwlab

annotate lcdtest/dispatch.c @ 17:43cc53581975

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lcdtest: PPM image display implemented
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 07 Apr 2018 21:57:54 +0000
parents 1e94c7d4af03
children f3671d3ad953
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12
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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_fc();
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8 extern int cmd_fr();
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9 extern int cmd_rd();
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10 extern int cmd_ri();
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11 extern int cmd_show();
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12 extern int cmd_wd();
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13 extern int cmd_wi();
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14 extern int cmd_wr();
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15
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16 extern int reset_pulse();
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17
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18 cmd_exit()
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19 {
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20 exit(0);
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21 }
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22
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23 static struct cmdtab {
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24 char *cmd;
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25 int minargs;
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26 int maxargs;
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27 int (*func)();
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28 } cmdtab[] = {
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29 {"exit", 0, 0, cmd_exit},
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30 {"fc", 1, 16, cmd_fc},
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31 {"fr", 1, 1, cmd_fr},
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32 {"quit", 0, 0, cmd_exit},
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33 {"rd", 0, 0, cmd_rd},
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34 {"reset", 0, 0, reset_pulse},
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35 {"ri", 0, 0, cmd_ri},
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36 {"show", 1, 1, cmd_show},
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37 {"wd", 1, 1, cmd_wd},
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38 {"wi", 1, 1, cmd_wi},
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39 {"wr", 2, 2, cmd_wr},
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40 {0, 0, 0, 0}
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41 };
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42
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43 dispatch_cmd(cmd)
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44 char *cmd;
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45 {
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46 char *argv[18];
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47 char *cp, **ap;
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48 struct cmdtab *tp;
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49
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50 for (cp = cmd; isspace(*cp); cp++)
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51 ;
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52 if (!*cp || *cp == '#')
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53 return(0);
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54 argv[0] = cp;
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55 while (*cp && !isspace(*cp))
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56 cp++;
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57 if (*cp)
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58 *cp++ = '\0';
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59 for (tp = cmdtab; tp->cmd; tp++)
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60 if (!strcmp(tp->cmd, argv[0]))
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61 break;
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62 if (!tp->func) {
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63 fprintf(stderr, "error: no such command\n");
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64 return(-1);
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65 }
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66 for (ap = argv + 1; ; ) {
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67 while (isspace(*cp))
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68 cp++;
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69 if (!*cp || *cp == '#')
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70 break;
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71 if (ap - argv - 1 >= tp->maxargs) {
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72 fprintf(stderr, "error: too many arguments\n");
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73 return(-1);
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74 }
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75 *ap++ = cp;
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76 while (*cp && !isspace(*cp))
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77 cp++;
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78 if (*cp)
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79 *cp++ = '\0';
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80 }
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81 if (ap - argv - 1 < tp->minargs) {
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82 fprintf(stderr, "error: too few arguments\n");
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83 return(-1);
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84 }
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85 *ap = 0;
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86 return tp->func(ap - argv, argv);
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87 }