rewrite 'unknown' command dispatching in C

[openocd.git] / src / helper / command.c

diff --git a/src/helper/command.c b/src/helper/command.c
index 54bfb964a982bb26f64fc4efaa13718147fc3dde..dd109657069aa349b5f1e874d5577c90aa9e38e7 100644 (file)
--- a/src/helper/command.c
+++ b/src/helper/command.c
@@ -853,6 +853,70 @@ COMMAND_HANDLER(handle_usage_command)
        return CALL_COMMAND_HANDLER(command_help_show, c, 0, false);
 }
 
+static int command_unknown_find(unsigned argc, Jim_Obj *const *argv,
+               struct command *head, struct command **out)
+{
+       if (0 == argc)
+               return argc;
+       struct command *c = command_find(head, Jim_GetString(argv[0], NULL));
+       if (NULL == c)
+               return argc;
+       *out = c;
+       return command_unknown_find(--argc, ++argv, (*out)->children, out);
+}
+
+static int command_unknown(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
+{
+       const char *cmd_name = Jim_GetString(argv[0], NULL);
+       script_debug(interp, cmd_name, argc - 1, argv + 1);
+
+       struct command_context *cmd_ctx = current_command_context();
+       struct command *c = cmd_ctx->commands;
+       int remaining = command_unknown_find(argc - 1, argv + 1, c, &c);
+       // if nothing could be consumed, then it's really an unknown command
+       if (remaining == argc - 1)
+       {
+               const char *cmd = Jim_GetString(argv[1], NULL);
+               LOG_ERROR("Unknown command:\n  %s", cmd);
+               return JIM_OK;
+       }
+
+       bool found = true;
+       Jim_Obj *const *start;
+       unsigned count;
+       if (c->handler)
+       {
+               // include the command name in the list
+               count = remaining + 1;
+               start = argv + (argc - remaining - 1);
+       }
+       else
+       {
+               c = command_find(cmd_ctx->commands, "help");
+               if (NULL == c)
+               {
+                       LOG_ERROR("unknown command, but help is missing too");
+                       return JIM_ERR;
+               }
+               count = argc - remaining;
+               start = argv;
+               found = false;
+       }
+
+       unsigned nwords;
+       const char **words = script_command_args_alloc(count, start, &nwords);
+       if (NULL == words)
+               return JIM_ERR;
+
+       int retval = run_command(cmd_ctx, c, words, nwords);
+
+       script_command_args_free(words, nwords);
+
+       if (!found && ERROR_OK == retval)
+               retval = ERROR_FAIL;
+
+       return retval;
+}
 
 int help_add_command(struct command_context *cmd_ctx, struct command *parent,
                const char *cmd_name, const char *help_text, const char *usage)
@@ -1032,6 +1096,7 @@ struct command_context* command_init(const char *startup_tcl)
        Jim_SetGlobalVariableStr(interp, "ocd_HOSTOS",
                        Jim_NewStringObj(interp, HostOs , strlen(HostOs)));
 
+       Jim_CreateCommand(interp, "unknown", &command_unknown, NULL, NULL);
        Jim_CreateCommand(interp, "ocd_find", jim_find, NULL, NULL);
        Jim_CreateCommand(interp, "echo", jim_echo, NULL, NULL);
        Jim_CreateCommand(interp, "capture", jim_capture, NULL, NULL);