FreeCalypso > hg > fc-pcm-if

annotate sw/mcsi-rxtx/usercmd.c @ 7:8a386263dd51

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fc-mcsi-rxtx skeleton put together
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 28 Oct 2024 01:44:28 +0000
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children c1d9b5d128f5
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7
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1 /*
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2 * This module implements fc-mcsi-rxtx user command dispatch.
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3 */
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4
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5 #include <sys/types.h>
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6 #include <ctype.h>
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7 #include <stdio.h>
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8 #include <string.h>
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9 #include <strings.h>
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10 #include <stdlib.h>
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11
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12 extern char usercmd[];
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13
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14 static void
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15 cmd_exit()
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16 {
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17 tty_cleanup();
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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 void (*func)();
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26 } cmdtab[] = {
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27 {"exit", 0, 0, cmd_exit},
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28 {"quit", 0, 0, cmd_exit},
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29 {0, 0, 0, 0}
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30 };
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31
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32 void
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33 dispatch_user_cmd()
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34 {
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35 char *argv[10];
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36 char *cp, **ap;
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37 struct cmdtab *tp;
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38
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39 for (cp = usercmd; isspace(*cp); cp++)
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40 ;
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41 if (!*cp || *cp == '#')
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42 return;
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43 argv[0] = cp;
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44 while (*cp && !isspace(*cp))
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45 cp++;
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46 if (*cp)
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47 *cp++ = '\0';
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48 for (tp = cmdtab; tp->cmd; tp++)
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49 if (!strcmp(tp->cmd, argv[0]))
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50 break;
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51 if (!tp->func) {
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52 printf("error: no such command\n");
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53 return;
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54 }
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55 for (ap = argv + 1; ; ) {
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56 while (isspace(*cp))
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57 cp++;
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58 if (!*cp || *cp == '#')
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59 break;
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60 if (ap - argv - 1 >= tp->maxargs) {
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61 printf("error: too many arguments\n");
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62 return;
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63 }
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64 if (*cp == '"') {
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65 *ap++ = ++cp;
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66 while (*cp && *cp != '"')
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67 cp++;
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68 if (*cp != '"') {
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69 printf("error: unterminated quoted string\n");
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70 return;
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71 }
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72 *cp++ = '\0';
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73 } else {
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74 *ap++ = cp;
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75 while (*cp && !isspace(*cp))
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76 cp++;
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77 if (*cp)
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78 *cp++ = '\0';
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79 }
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80 }
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81 if (ap - argv - 1 < tp->minargs) {
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82 printf("error: too few arguments\n");
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83 return;
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84 }
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85 *ap = 0;
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86 tp->func(ap - argv, argv);
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87 }