mirror of
https://github.com/RetroDECK/Supermodel.git
synced 2024-11-25 15:15:40 +00:00
121 lines
4.2 KiB
C++
121 lines
4.2 KiB
C++
/**
|
|
** Supermodel
|
|
** A Sega Model 3 Arcade Emulator.
|
|
** Copyright 2011 Bart Trzynadlowski, Nik Henson
|
|
**
|
|
** This file is part of Supermodel.
|
|
**
|
|
** Supermodel 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, either version 3 of the License, or (at your option)
|
|
** any later version.
|
|
**
|
|
** Supermodel 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 Supermodel. If not, see <http://www.gnu.org/licenses/>.
|
|
**/
|
|
|
|
/*
|
|
* ROMLoad.h
|
|
*
|
|
* Header file for ROM loading functions.
|
|
*/
|
|
|
|
#ifndef INCLUDED_ROMLOAD_H
|
|
#define INCLUDED_ROMLOAD_H
|
|
|
|
#include <cstdint>
|
|
|
|
|
|
/******************************************************************************
|
|
Data Structures
|
|
******************************************************************************/
|
|
|
|
/*
|
|
* ROMInfo:
|
|
*
|
|
* Describes a single ROM file.
|
|
*/
|
|
struct ROMInfo
|
|
{
|
|
// Function
|
|
const char *region; // ROM region identifier (used as a key to search ROMMap)
|
|
bool optional; // whether needs to be present or not
|
|
|
|
// Information used to identify files
|
|
const char *fileName; // file name
|
|
uint32_t crc; // CRC-32 checksum (same as zip format)
|
|
unsigned fileSize; // file size in bytes (must be the same as all other ROMs with same region ID)
|
|
|
|
// Interleaving information
|
|
unsigned groupSize; // number of consecutive bytes to fetch each time (groupSize%2 must = 0, must be consistent for region)
|
|
unsigned offset; // starting offset within ROM region
|
|
unsigned stride; // number of bytes to skip before loading next group of bytes from file (must be >= groupSize)
|
|
bool byteSwap; // swap every pair of bytes if true
|
|
};
|
|
|
|
/*
|
|
* ROMMap:
|
|
*
|
|
* Describes how to map ROM regions (where to load them). This structure is
|
|
* assembled after memory allocation is completed and tells the ROM loading
|
|
* functions where to load files by matching region identifiers with memory
|
|
* pointers.
|
|
*
|
|
* Both pointers must be set to NULL to terminate an array of ROM maps.
|
|
*/
|
|
struct ROMMap
|
|
{
|
|
const char *region; // ROM region identifier
|
|
uint8_t *ptr; // pointer to memory region
|
|
};
|
|
|
|
|
|
/******************************************************************************
|
|
Functions
|
|
******************************************************************************/
|
|
|
|
/*
|
|
* CopyRegion(dest, destOffset, destSize, src, srcSize):
|
|
*
|
|
* Repeatedly mirror (copy) to destination from source until destination is
|
|
* filled.
|
|
*
|
|
* Parameters:
|
|
* dest Destination region.
|
|
* destOffset Offset within destination to begin mirroring to.
|
|
* destSize Size in bytes of destination region.
|
|
* src Source region to copy from.
|
|
* srcSize Size of region to copy from.
|
|
*/
|
|
extern void CopyRegion(uint8_t *dest, unsigned destOffset, unsigned destSize, uint8_t *src, unsigned srcSize);
|
|
|
|
/*
|
|
* LoadROMSetFromZIPFile(Map, GameList, zipFile):
|
|
*
|
|
* Loads a complete ROM set from a zip archive. Automatically detects the game.
|
|
* If multiple games exist within the archive, an error will be printed and all
|
|
* but the first detected game will be ignored.
|
|
*
|
|
* Parameters:
|
|
* Map A list of pointers to the memory buffers for each ROM
|
|
* region.
|
|
* GameList List of all supported games and their ROMs.
|
|
* zipFile ZIP file to load from.
|
|
* loadAll If true, will check to ensure all ROMs were loaded.
|
|
* Otherwise, omits this check and loads only specified
|
|
* regions.
|
|
*
|
|
* Returns:
|
|
* Pointer to GameInfo struct for loaded game if successful, NULL
|
|
* otherwise. Prints errors.
|
|
*/
|
|
extern const struct GameInfo * LoadROMSetFromZIPFile(const struct ROMMap *Map, const struct GameInfo *GameList, const char *zipFile, bool loadAll);
|
|
|
|
|
|
#endif // INCLUDED_ROMLOAD_H
|