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75 lines
2.5 KiB
75 lines
2.5 KiB
/* 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 <[email protected]> |
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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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