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automata.h
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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]; \ }