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add 'command type' introspective handler 

Adds the 'command' group handler, with the 'type' command producing
a string that tells whether the given command is 'native' (for Jim-based
command handlers), 'simple' (for simple built-in commands), 'group'
for command group placeholders, and 'unknown' if not found in the
command registration tables (e.g. core built-ins functions).
This commit is contained in:
Zachary T Welch 2009-11-27 18:59:14 -08:00
parent 5f0223423d
commit 37dd5a685a
1 changed files with 43 additions and 0 deletions
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43
src/helper/command.c
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@ -948,6 +948,31 @@ static int command_unknown(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
return script_command_run(interp, count, start, c, found);
}
static int jim_command_type(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
if (1 == argc)
return JIM_ERR;
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, true);
// if nothing could be consumed, then it's an unknown command
if (remaining == argc - 1)
{
Jim_SetResultString(interp, "unknown", -1);
return JIM_OK;
}
if (c->jim_handler)
Jim_SetResultString(interp, "native", -1);
else if (c->handler)
Jim_SetResultString(interp, "simple", -1);
else
Jim_SetResultString(interp, "group", -1);
return JIM_OK;
}
int help_add_command(struct command_context *cmd_ctx, struct command *parent,
const char *cmd_name, const char *help_text, const char *usage)
{
@ -1069,6 +1094,18 @@ COMMAND_HANDLER(handle_sleep_command)
return ERROR_OK;
}
static const struct command_registration command_subcommand_handlers[] = {
{
.name = "type",
.mode = COMMAND_ANY,
.jim_handler = &jim_command_type,
.usage = "<name> ...",
.help = "Returns the type of built-in command:"
"'native', 'simple', 'group', or 'unknown'",
},
COMMAND_REGISTRATION_DONE
};
static const struct command_registration command_builtin_handlers[] = {
{
.name = "add_help_text",
@ -1106,6 +1143,12 @@ static const struct command_registration command_builtin_handlers[] = {
.help = "show basic command usage",
.usage = "[<command> ...]",
},
{
.name = "command",
.mode= COMMAND_ANY,
.help = "core command group (introspection)",
.chain = command_subcommand_handlers,
},
COMMAND_REGISTRATION_DONE
};