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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2019-2022 Red Hat, Inc. Daniel Bristot de Oliveira <bristot@kernel.org>
*
* Deterministic automata helper functions, to be used with the automata
* models in C generated by the dot2k tool.
*/
/*
* DECLARE_AUTOMATA_HELPERS - define a set of helper functions for automata
*
* Define a set of helper functions for automata. The 'name' argument is used
* as suffix for the functions and data. These functions will handle automaton
* with data type 'type'.
*/
#define DECLARE_AUTOMATA_HELPERS(name, type) \
\
/* \
* model_get_state_name_##name - return the (string) name of the given state \
*/ \
static char *model_get_state_name_##name(enum states_##name state) \
{ \
if ((state < 0) || (state >= state_max_##name)) \
return "INVALID"; \
\
return automaton_##name.state_names[state]; \
} \
\
/* \
* model_get_event_name_##name - return the (string) name of the given event \
*/ \
static char *model_get_event_name_##name(enum events_##name event) \
{ \
if ((event < 0) || (event >= event_max_##name)) \
return "INVALID"; \
\
return automaton_##name.event_names[event]; \
} \
\
/* \
* model_get_initial_state_##name - return the automaton's initial state \
*/ \
static inline type model_get_initial_state_##name(void) \
{ \
return automaton_##name.initial_state; \
} \
\
/* \
* model_get_next_state_##name - process an automaton event occurrence \
* \
* Given the current state (curr_state) and the event (event), returns \
* the next state, or INVALID_STATE in case of error. \
*/ \
static inline type model_get_next_state_##name(enum states_##name curr_state, \
enum events_##name event) \
{ \
if ((curr_state < 0) || (curr_state >= state_max_##name)) \
return INVALID_STATE; \
\
if ((event < 0) || (event >= event_max_##name)) \
return INVALID_STATE; \
\
return automaton_##name.function[curr_state][event]; \
} \
\
/* \
* model_is_final_state_##name - check if the given state is a final state \
*/ \
static inline bool model_is_final_state_##name(enum states_##name state) \
{ \
if ((state < 0) || (state >= state_max_##name)) \
return 0; \
\
return automaton_##name.final_states[state]; \
}
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