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Factors out boilerplate around full-device sector images.

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This commit is contained in:
Thomas Harte 2021-05-01 21:10:46 -04:00
parent c906dc3c0a
commit 20c814a4dd
4 changed files with 64 additions and 38 deletions
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2
OSBindings/Mac/Clock Signal.xcodeproj/project.pbxproj
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@ -1524,6 +1524,7 @@
4B9378E322A199C600973513 /* Audio.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = Audio.hpp; sourceTree = "<group>"; };
4B95FA9C1F11893B0008E395 /* ZX8081OptionsPanel.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ZX8081OptionsPanel.swift; sourceTree = "<group>"; };
4B961408222760E0001A7BF2 /* Screenshot.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = Screenshot.hpp; sourceTree = "<group>"; };
4B96F7CB263E30B00092AEE1 /* RawSectorDump.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = RawSectorDump.hpp; sourceTree = "<group>"; };
4B98A05C1FFAD3F600ADF63B /* CSROMFetcher.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = CSROMFetcher.hpp; sourceTree = "<group>"; };
4B98A05D1FFAD3F600ADF63B /* CSROMFetcher.mm */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.objcpp; path = CSROMFetcher.mm; sourceTree = "<group>"; };
4B98A0601FFADCDE00ADF63B /* MSXStaticAnalyserTests.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = MSXStaticAnalyserTests.mm; sourceTree = "<group>"; };
@ -2973,6 +2974,7 @@
4B74CF802312FA9C00500CE8 /* HFV.cpp */,
4BE8EB6425C750B50040BC40 /* DAT.cpp */,
4BE8EB6525C750B50040BC40 /* DAT.hpp */,
4B96F7CB263E30B00092AEE1 /* RawSectorDump.hpp */,
);
path = Formats;
sourceTree = "<group>";

33
Storage/MassStorage/Formats/DAT.cpp
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@ -10,32 +10,13 @@
using namespace Storage::MassStorage;
DAT::DAT(const std::string &file_name) : file_(file_name) {
// Is the file a multiple of 256 bytes in size?
const auto file_size = file_.stats().st_size;
if(file_size & 255) throw std::exception();
// Does it contain the 'Hugo' signature?
file_.seek(0x201, SEEK_SET);
if(!file_.check_signature("Hugo")) {
DAT::DAT(const std::string &file_name) : RawSectorDump(file_name) {
// Does the third sector contain the 'Hugo' signature?
const auto sector3 = get_block(2);
if(sector3.size() != 256) {
throw std::exception();
}
if(sector3[1] != 'H' || sector3[2] != 'u' || sector3[3] != 'g' || sector3[4] != 'o') {
throw std::exception();
}
}
size_t DAT::get_block_size() {
return 256;
}
size_t DAT::get_number_of_blocks() {
return size_t(file_.stats().st_size) / 256;
}
std::vector<uint8_t> DAT::get_block(size_t address) {
file_.seek(long(address * 256), SEEK_SET);
return file_.read(256);
}
void DAT::set_block(size_t address, const std::vector<uint8_t> &contents) {
file_.seek(long(address * 256), SEEK_SET);
file_.write(contents);
}

14
Storage/MassStorage/Formats/DAT.hpp
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@ -9,8 +9,7 @@
#ifndef MassStorage_DAT_hpp
#define MassStorage_DAT_hpp
#include "../MassStorageDevice.hpp"
#include "../../FileHolder.hpp"
#include "RawSectorDump.hpp"
namespace Storage {
namespace MassStorage {
@ -20,18 +19,9 @@ namespace MassStorage {
sector dump of an ADFS volume. It will be validated for an ADFS catalogue and communicate
in 256-byte blocks.
*/
class DAT: public MassStorageDevice {
class DAT: public RawSectorDump<256> {
public:
DAT(const std::string &file_name);
private:
FileHolder file_;
/* MassStorageDevices overrides. */
size_t get_block_size() final;
size_t get_number_of_blocks() final;
std::vector<uint8_t> get_block(size_t address) final;
void set_block(size_t address, const std::vector<uint8_t> &) final;
};
}

53
Storage/MassStorage/Formats/RawSectorDump.hpp Normal file
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@ -0,0 +1,53 @@
//
// RawSectorDump.hpp
// Clock Signal
//
// Created by Thomas Harte on 01/05/2021.
// Copyright © 2021 Thomas Harte. All rights reserved.
//
#ifndef RawSectorDump_h
#define RawSectorDump_h
#include "../MassStorageDevice.hpp"
#include "../../FileHolder.hpp"
namespace Storage {
namespace MassStorage {
template <size_t sector_size> class RawSectorDump: public MassStorageDevice {
public:
RawSectorDump(const std::string &file_name) : file_(file_name) {
// Is the file a multiple of sector_size bytes in size?
const auto file_size = size_t(file_.stats().st_size);
if(file_size % sector_size) throw std::exception();
}
/* MassStorageDevices overrides. */
size_t get_block_size() final {
return sector_size;
}
size_t get_number_of_blocks() final {
return size_t(file_.stats().st_size) / sector_size;
}
std::vector<uint8_t> get_block(size_t address) final {
file_.seek(long(address * sector_size), SEEK_SET);
return file_.read(sector_size);
}
void set_block(size_t address, const std::vector<uint8_t> &contents) final {
assert(contents.size() == sector_size);
file_.seek(long(address * sector_size), SEEK_SET);
file_.write(contents);
}
private:
FileHolder file_;
};
}
}
#endif /* RawSectorDump_h */