type21.h

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/*
 * SPDX-License-Identifier: LGPL-2.1-or-later
 *
 * This file is part of lazybios.
 *
 * lazybios is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * lazybios is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with lazybios. If not, see <https://www.gnu.org/licenses/>.
 */
/**
 * @file type21.h
 * @brief Public API for SMBIOS Type 21 Built-in Pointing Device.
 * @author LazySeldi
 */
 
#ifndef LAZYBIOS_TYPE21_H
#define LAZYBIOS_TYPE21_H
 
#ifndef LAZYBIOS_SHARED_API_H
#define LAZYBIOS_TYPE_HEADER_ONLY
#include "lazybios/lazybios.h"
#undef LAZYBIOS_TYPE_HEADER_ONLY
#endif
 
#ifdef __cplusplus
extern "C" {
#endif
 
/** @brief Availability metadata for SMBIOS Type 21 fields. */
typedef struct {
    lazybiosFieldStatus_t pointing_device_type;
    lazybiosFieldStatus_t interface;
    lazybiosFieldStatus_t number_of_buttons;
} lazybiosType21FieldStatus_t;
 
/**
 * @brief Decoded forms of the Type 21 encoded fields.
 *
 * Each member holds the decoded form of the raw field it is named for.
 * Consult the matching `field_status` member before using one.
 */
typedef struct {
    const char* interface;
    const char* pointing_device_type;
} lazybiosType21Decoded_t;
 
/**
 * @brief Parsed SMBIOS Type 21 Built-in Pointing Device.
 * @ingroup api_type21
 */
typedef struct {
    uint16_t handle;
    uint8_t length;
    uint8_t pointing_device_type;
    uint8_t interface;
    uint8_t number_of_buttons;
    lazybiosType21Decoded_t decoded;
    lazybiosType21FieldStatus_t field_status;
} lazybiosType21_t;
 
/**
 * @brief A parsed set of SMBIOS Type 21 structures.
 * @ingroup api_type21
 */
typedef struct {
    lazybiosType21_t* entries;
    size_t count;
} lazybiosType21Array_t;
 
/** @addtogroup api_type21
 * @{
 */
 
/**
 * @brief Parses all SMBIOS Type 21 structures.
 * @param DMIData Raw DMI table container to parse.
 * @return Newly allocated set, empty when the table holds no Type 21 structure,
 *         or NULL when the arguments are unusable or an allocation fails.
 */
LAZYBIOS_WARN_UNUSED lazybiosType21Array_t* lazybiosGetType21(const lazybiosDMI_t* DMIData);
 
/**
 * @brief Releases a parsed set of SMBIOS Type 21 structures.
 * @param Type21 Set to release; may be NULL.
 */
void lazybiosFreeType21(lazybiosType21Array_t* Type21);
 
/** @} */
 
#ifdef __cplusplus
}
#endif
 
#endif