FreeCalypso > hg > freecalypso-tools

annotate rvinterf/old/g23sh/usercmd.c @ 461:10e168596dfd

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doc/SIM-hardware-debugging: article written
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 10 Feb 2019 20:40:56 +0000
parents e7502631a0f9
children
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Mychaela Falconia <falcon@freecalypso.org>
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1 /*
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2 * This module implements g23sh 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 extern void cmd_sendsp();
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15
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16 void
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17 cmd_exit()
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18 {
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19 tty_cleanup();
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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 void (*func)();
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28 } cmdtab[] = {
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29 {"exit", 0, 0, cmd_exit},
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30 {"quit", 0, 0, cmd_exit},
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31 {"sp", 2, 2, cmd_sendsp},
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32 {0, 0, 0, 0}
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33 };
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34
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35 void
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36 dispatch_user_cmd()
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37 {
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38 char *argv[10];
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39 char *cp, **ap;
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40 struct cmdtab *tp;
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41
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42 for (cp = usercmd; isspace(*cp); cp++)
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43 ;
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44 if (!*cp || *cp == '#')
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45 return;
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46 argv[0] = cp;
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47 while (*cp && !isspace(*cp))
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48 cp++;
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49 if (*cp)
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50 *cp++ = '\0';
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51 for (tp = cmdtab; tp->cmd; tp++)
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52 if (!strcmp(tp->cmd, argv[0]))
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53 break;
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54 if (!tp->func) {
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55 printf("error: no such command\n");
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56 return;
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57 }
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58 for (ap = argv + 1; ; ) {
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59 while (isspace(*cp))
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60 cp++;
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61 if (!*cp || *cp == '#')
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62 break;
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63 if (ap - argv - 1 >= tp->maxargs) {
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64 printf("error: too many arguments\n");
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65 return;
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66 }
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67 if (*cp == '"') {
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68 *ap++ = ++cp;
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69 while (*cp && *cp != '"')
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70 cp++;
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71 if (*cp != '"') {
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72 printf("error: unterminated quoted string\n");
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73 return;
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74 }
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75 *cp++ = '\0';
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76 } else {
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77 *ap++ = cp;
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78 while (*cp && !isspace(*cp))
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79 cp++;
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80 if (*cp)
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81 *cp++ = '\0';
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82 }
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83 }
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84 if (ap - argv - 1 < tp->minargs) {
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85 printf("error: too few arguments\n");
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86 return;
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87 }
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88 *ap = 0;
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89 tp->func(ap - argv, argv);
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90 }