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annotate sw/mcsi-rxtx/usercmd.c @ 16:f422d19c0118 default tip

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fc-mcsi-rxtx: fix bug in PCM sample Rx
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 29 Oct 2024 01:41:33 +0000
parents 315428573a25
children
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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
12
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14 extern void cmd_pcm_fill();
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15 extern void cmd_print_rx();
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16 extern void cmd_record();
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17 extern void cmd_record_stop();
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18
7
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19 static void
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20 cmd_exit()
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21 {
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22 tty_cleanup();
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23 exit(0);
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24 }
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25
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26 static struct cmdtab {
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27 char *cmd;
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28 int minargs;
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29 int maxargs;
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30 void (*func)();
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31 } cmdtab[] = {
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32 {"exit", 0, 0, cmd_exit},
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33 {"pcm-fill", 0, 1, cmd_pcm_fill},
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34 {"print-rx", 0, 0, cmd_print_rx},
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35 {"quit", 0, 0, cmd_exit},
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36 {"record", 1, 1, cmd_record},
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37 {"record-stop", 0, 0, cmd_record_stop},
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38 /* table search terminator */
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39 {0, 0, 0, 0}
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40 };
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41
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42 void
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43 dispatch_user_cmd()
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44 {
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45 char *argv[10];
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46 char *cp, **ap;
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47 struct cmdtab *tp;
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48
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49 for (cp = usercmd; isspace(*cp); cp++)
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50 ;
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51 if (!*cp || *cp == '#')
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52 return;
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53 argv[0] = cp;
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54 while (*cp && !isspace(*cp))
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55 cp++;
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56 if (*cp)
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57 *cp++ = '\0';
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58 for (tp = cmdtab; tp->cmd; tp++)
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59 if (!strcmp(tp->cmd, argv[0]))
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60 break;
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61 if (!tp->func) {
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62 printf("error: no such command\n");
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63 return;
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64 }
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65 for (ap = argv + 1; ; ) {
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66 while (isspace(*cp))
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67 cp++;
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68 if (!*cp || *cp == '#')
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69 break;
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70 if (ap - argv - 1 >= tp->maxargs) {
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71 printf("error: too many arguments\n");
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72 return;
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73 }
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74 if (*cp == '"') {
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75 *ap++ = ++cp;
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76 while (*cp && *cp != '"')
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77 cp++;
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78 if (*cp != '"') {
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79 printf("error: unterminated quoted string\n");
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80 return;
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81 }
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82 *cp++ = '\0';
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83 } else {
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84 *ap++ = cp;
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85 while (*cp && !isspace(*cp))
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86 cp++;
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87 if (*cp)
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88 *cp++ = '\0';
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89 }
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90 }
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91 if (ap - argv - 1 < tp->minargs) {
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92 printf("error: too few arguments\n");
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93 return;
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94 }
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95 *ap = 0;
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96 tp->func(ap - argv, argv);
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97 }