/**
 * @file		data_struct.h
 * @date		16/09/2022
 * @author		JackCarterSmith
 * @copyright	GPL-v3.0
 * @brief		Data file mapping definition.
 *
 */

#ifndef DATA_STRUCT_H_
#define DATA_STRUCT_H_

#ifndef PACK
#	if defined(_MSC_VER)
#		define PACK
#	elif defined(__GNUC__)
#		define PACK __attribute__((packed))
#	endif
#endif


namespace RDI {

	////////////////////////////////////////////////////////////////////////////
	//                Declaration of Memory Mapped Structure
	//	 Caution: the place of variable is important for correct mapping!
	////////////////////////////////////////////////////////////////////////////

#if defined(_MSC_VER)
#pragma pack(push, 1)
#endif

	/*
	 * DATA.DAT content type
	 */
	typedef struct PACK file_header {
		unsigned int datas_offset;
		unsigned int datas_size;			// If file is directory, equal to sum of it's file.
		unsigned int reserved0;				// 0xFFFFFFFF
		unsigned short flags;
		unsigned short dir_entries_size;	// If directory = sum of files entry size + itself, 0 if standard file.
		char name[16];						// File extension is UPPERCASE, separated of file name by '_'.
	} T_FILE_HEADER;

	typedef struct PACK dat_section {
		unsigned int file_headers_offset;
		unsigned int file_headers_size;
		unsigned char files_datas;			// Should be used as start pointer for memcpy.
	} T_DAT_SECTION;


	/*
	 * DATA.HDR content type
	 * Entries are in a row, test for EOF.
	 */
	typedef struct PACK hdr_entry {
		char section_name[16];
		unsigned int reserved0;				// 12B of zeros
		unsigned int reserved1;
		unsigned int reserved2;
		unsigned int section_offset;
	} T_HDR_ENTRY;

#if defined(_MSC_VER)
#pragma pack(pop)
#endif

}

#endif /* DATA_STRUCT_H_ */