mirror of https://github.com/rusefi/bldc.git
82 lines
2.7 KiB
C
82 lines
2.7 KiB
C
/** \file extensions.h */
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/*
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Copyright 2019, 2022 Joel Svensson svenssonjoel@yahoo.se
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2022 Benjamin Vedder
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef EXTENSIONS_H_
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#define EXTENSIONS_H_
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#include "symrepr.h"
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#include "heap.h"
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#include "lbm_types.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define LBM_EXTENSION(name, argv, argn) \
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__attribute__((aligned(LBM_STORABLE_ADDRESS_ALIGNMENT))) lbm_value name(lbm_value *(argv), lbm_uint (argn))
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/** Type representing an extension function.
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* \param Pointer to array of lbm_values.
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* \param Number of arguments.
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* \return Result value.
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*/
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typedef lbm_value (*extension_fptr)(lbm_value*,lbm_uint);
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/** Initialize the extensions subsystem.
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*
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* \param extension_storage Pointer to array of extension_fptr.
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* \param extension_storage_size Size of function pointer array.
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* \return 1 on success and 0 for failure
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*/
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int lbm_extensions_init(extension_fptr *extension_storage, int extension_storage_size);
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/** Look up an extension associated with a key symbol.
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*
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* \param sym Symbol bound to the extension to look for.
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* \return extension_fptr on success or NULL on failure.
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*/
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extension_fptr lbm_get_extension(lbm_uint sym);
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/** Reset an extension back to the default value.
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* Trying to apply the extension after clearing it will result
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* in an eval error.
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*
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* \param sym_id Symbol id of the extension to clear.
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* \return true if successfully cleared an extension otherwise false.
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*/
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bool lbm_clr_extension(lbm_uint sym_id);
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/** Adds a symbol-extension mapping.
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* \param sym_str String representation of symbol to use as key.
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* \param ext The extension function pointer.
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* \return true on success and false on failure.
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*/
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bool lbm_add_extension(char *sym_str, extension_fptr ext);
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/** Check if an lbm_value is a symbol that is bound to an extension.
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* \param exp Key to look up.
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* \return true if the lbm_value respresents an extension otherwise false.
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*/
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static inline bool lbm_is_extension(lbm_value exp) {
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return ((lbm_type_of(exp) == LBM_TYPE_SYMBOL) &&
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(lbm_get_extension(lbm_dec_sym(exp)) != NULL));
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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