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