dingusppc/devices/storage/blockstoragedevice.h
joevt 3978d0754d CD-ROM: Add max blocks check.
The code does not support more than 2^32 - 2 blocks because of this expression: static_cast<uint32_t>(this->size_blocks + 1)
2024-03-01 08:01:31 -07:00

64 lines
2.2 KiB
C++

/*
DingusPPC - The Experimental PowerPC Macintosh emulator
Copyright (C) 2018-23 divingkatae and maximum
(theweirdo) spatium
(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
This program 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.
This program 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 program. If not, see <https://www.gnu.org/licenses/>.
*/
/** @file Block storage device definitions. */
#ifndef BLOCK_STORAGE_DEVICE_H
#define BLOCK_STORAGE_DEVICE_H
#include <utils/imgfile.h>
#include <cinttypes>
#include <memory>
#include <string>
class BlockStorageDevice {
public:
BlockStorageDevice(const uint32_t cache_blocks, const uint32_t block_size=512, const uint64_t max_blocks=0xffffffffffffffff);
~BlockStorageDevice();
void set_block_size(const int blk_size) { this->block_size = blk_size; };
int set_host_file(std::string file_path);
int set_fpos(const uint32_t lba);
int read_begin(int nblocks, uint32_t max_len);
int data_left() { return this->remain_size; };
int read_more();
int write_begin(char *buf, int nblocks);
protected:
ImgFile img_file;
uint64_t size_bytes = 0; // image file size in bytes
uint64_t size_blocks = 0; // image file size in blocks
uint64_t max_blocks = 0; // maximum number of blocks supported
uint64_t cur_fpos = 0; // current image file pointer position
uint32_t block_size = 512; // physical block size
uint32_t cache_size = 0; // cache size
uint32_t remain_size = 0;
bool is_writeable = false;
bool is_ready = false; // ready for operation
std::unique_ptr<char[]> data_cache;
};
#endif // BLOCK_STORAGE_DEVICE_H