PropertyData.h

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/****
 * ConfigDB/PropertyData.h
 *
 * Copyright 2024 mikee47 <mike@sillyhouse.net>
 *
 * This file is part of the ConfigDB Library
 *
 * This library is free software: you can redistribute it and/or modify it under the terms of the
 * GNU General Public License as published by the Free Software Foundation, version 3 or later.
 *
 * This library 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this library.
 * If not, see <https://www.gnu.org/licenses/>.
 *
 ****/
 
#pragma once
 
#include "PropertyInfo.h"
 
namespace ConfigDB
{
struct __attribute__((packed)) ArrayId {
    uint8_t value_[2];
 
    constexpr ArrayId(uint16_t value = 0) : value_{uint8_t(value), uint8_t(value >> 8)}
    {
    }
 
    constexpr operator uint16_t() const
    {
        return value_[0] | (value_[1] << 8);
    }
};
 
union __attribute__((packed)) PropertyData {
    uint8_t uint8;
    uint16_t uint16;
    uint32_t uint32;
    int8_t int8;
    int16_t int16;
    int32_t int32;
    int64_t int64;
    bool boolean;
    Number number;
    ArrayId array;
    StringId string;
 
    String getString(const PropertyInfo& info) const;
 
    bool setValue(const PropertyInfo& prop, int64_t value);
 
    bool setValue(const PropertyInfo& prop, Number value);
 
    bool setValue(const PropertyInfo& prop, const char* value, unsigned valueLength);
 
    static PropertyData* fromStruct(const PropertyInfo& prop, void* data)
    {
        return data ? reinterpret_cast<PropertyData*>(static_cast<uint8_t*>(data) + prop.offset) : nullptr;
    }
 
    static const PropertyData* fromStruct(const PropertyInfo& prop, const void* data)
    {
        return fromStruct(prop, const_cast<void*>(data));
    }
};
 
} // namespace ConfigDB