FreeCalypso > hg > freecalypso-hwlab
annotate lcdtest/dispatch.c @ 14:5a602e512b12
lcdtest: read ops split into command issuance and FTDI read
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sat, 07 Apr 2018 01:19:14 +0000 |
parents | 238a77db4134 |
children | 1e94c7d4af03 |
rev | line source |
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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_fr(); |
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8 extern int cmd_rd(); |
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9 extern int cmd_ri(); |
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10 extern int cmd_wd(); |
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11 extern int cmd_wi(); |
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12 extern int cmd_wr(); |
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13 |
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14 extern int reset_pulse(); |
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15 |
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16 cmd_exit() |
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17 { |
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18 exit(0); |
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19 } |
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20 |
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21 static struct cmdtab { |
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22 char *cmd; |
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23 int minargs; |
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24 int maxargs; |
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25 int (*func)(); |
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26 } cmdtab[] = { |
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27 {"exit", 0, 0, cmd_exit}, |
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28 {"fr", 1, 1, cmd_fr}, |
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29 {"quit", 0, 0, cmd_exit}, |
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30 {"rd", 0, 0, cmd_rd}, |
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31 {"reset", 0, 0, reset_pulse}, |
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32 {"ri", 0, 0, cmd_ri}, |
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33 {"wd", 1, 1, cmd_wd}, |
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34 {"wi", 1, 1, cmd_wi}, |
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35 {"wr", 2, 2, cmd_wr}, |
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36 {0, 0, 0, 0} |
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37 }; |
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38 |
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39 dispatch_cmd(cmd) |
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40 char *cmd; |
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41 { |
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42 char *argv[10]; |
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43 char *cp, **ap; |
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44 struct cmdtab *tp; |
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45 |
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46 for (cp = cmd; isspace(*cp); cp++) |
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47 ; |
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48 if (!*cp || *cp == '#') |
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49 return(0); |
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50 argv[0] = cp; |
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51 while (*cp && !isspace(*cp)) |
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52 cp++; |
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53 if (*cp) |
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54 *cp++ = '\0'; |
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55 for (tp = cmdtab; tp->cmd; tp++) |
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56 if (!strcmp(tp->cmd, argv[0])) |
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57 break; |
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58 if (!tp->func) { |
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59 fprintf(stderr, "error: no such command\n"); |
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60 return(-1); |
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61 } |
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62 for (ap = argv + 1; ; ) { |
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63 while (isspace(*cp)) |
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64 cp++; |
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65 if (!*cp || *cp == '#') |
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66 break; |
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67 if (ap - argv - 1 >= tp->maxargs) { |
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68 fprintf(stderr, "error: too many arguments\n"); |
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69 return(-1); |
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70 } |
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71 *ap++ = cp; |
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72 while (*cp && !isspace(*cp)) |
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73 cp++; |
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74 if (*cp) |
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75 *cp++ = '\0'; |
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76 } |
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77 if (ap - argv - 1 < tp->minargs) { |
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78 fprintf(stderr, "error: too few arguments\n"); |
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79 return(-1); |
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80 } |
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81 *ap = 0; |
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82 return tp->func(ap - argv, argv); |
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83 } |