Package.hpp

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/*
Copyright (C) 2013,2018,2021,2025,2026 Rodrigo Jose Hernandez Cordoba
 
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
 
http://www.apache.org/licenses/LICENSE-2.0
 
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#ifndef AEONGAMES_PACKAGE_H
#define AEONGAMES_PACKAGE_H
#include <cstdint>
#include <cstdio>
#include <vector>
#include <unordered_map>
#include <string>
#include <filesystem>
#include "aeongames/Platform.hpp"
namespace AeonGames
{
    enum PKGCompressionTypes
    {
        NONE = 0, 
        ZLIB      
    };

    struct PKGHeader
    {
        char id[8];
        uint16_t version[2];
        uint32_t file_size;
        uint32_t file_count;
        uint32_t string_table_offset;
    };

    struct PKGDirectoryEntry
    {
        uint32_t path;               
        uint32_t offset;             
        uint64_t extension_offset;   
        uint64_t compressed_size;    
        uint64_t uncompressed_size;  
        uint64_t compression_type;   
    };

    class Package
    {
    public:
        DLL Package ( const std::string& aPath );
        DLL ~Package();
        Package ( const Package& ) = delete;
        Package& operator= ( const Package& ) = delete;
        Package ( Package&& aPackage ) noexcept;
        Package& operator= ( Package&& ) = delete;
        DLL const std::filesystem::path& GetPath() const;
        DLL size_t GetFileSize ( uint32_t crc ) const;
        DLL size_t GetFileSize ( const std::string& aFileName ) const;
        DLL const std::unordered_map<uint32_t, std::string>& GetIndexTable() const;
        DLL void LoadFile ( uint32_t crc, void* buffer, size_t buffer_size ) const;
        DLL void LoadFile ( const std::string& aFileName, void* buffer, size_t buffer_size ) const;
    private:
        const std::filesystem::path mPath;
        std::unordered_map<uint32_t, std::string> mIndexTable;
    };
}
#endif