FreeCalypso > hg > freecalypso-hwlab

annotate lcdtest/dispatch.c @ 14:5a602e512b12

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lcdtest: read ops split into command issuance and FTDI read
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 07 Apr 2018 01:19:14 +0000
parents 238a77db4134
children 1e94c7d4af03
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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_fr();
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8 extern int cmd_rd();
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9 extern int cmd_ri();
12
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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 }