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Made reading of data optional.

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This commit is contained in:
Thomas Harte 2024-10-09 12:27:51 -04:00
parent 9acc80260f
commit 704495ff42
4 changed files with 22 additions and 18 deletions
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4
Analyser/Static/AmstradCPC/StaticAnalyser.cpp
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@ -233,7 +233,7 @@ Analyser::Static::TargetList Analyser::Static::AmstradCPC::GetTargets(const Medi
for(auto &disk: media.disks) {
// Check for an ordinary catalogue, making sure this isn't actually a ZX Spectrum disk.
std::unique_ptr<Storage::Disk::CPM::Catalogue> data_catalogue = Storage::Disk::CPM::GetCatalogue(disk, data_format);
std::unique_ptr<Storage::Disk::CPM::Catalogue> data_catalogue = Storage::Disk::CPM::GetCatalogue(disk, data_format, false);
if(data_catalogue && !data_catalogue->is_zx_spectrum_booter()) {
InspectCatalogue(*data_catalogue, target);
target->media.disks.push_back(disk);
@ -247,7 +247,7 @@ Analyser::Static::TargetList Analyser::Static::AmstradCPC::GetTargets(const Medi
}
// Failing that check for a system catalogue.
std::unique_ptr<Storage::Disk::CPM::Catalogue> system_catalogue = Storage::Disk::CPM::GetCatalogue(disk, system_format);
std::unique_ptr<Storage::Disk::CPM::Catalogue> system_catalogue = Storage::Disk::CPM::GetCatalogue(disk, system_format, false);
if(system_catalogue && !system_catalogue->is_zx_spectrum_booter()) {
InspectCatalogue(*system_catalogue, target);
target->media.disks.push_back(disk);

2
Analyser/Static/ZXSpectrum/StaticAnalyser.cpp
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@ -97,7 +97,7 @@ bool IsSpectrumDisk(const std::shared_ptr<Storage::Disk::Disk> &disk) {
}
// ... otherwise read a CPM directory and look for a BASIC program called "DISK".
const auto catalogue = Storage::Disk::CPM::GetCatalogue(disk, cpm_format);
const auto catalogue = Storage::Disk::CPM::GetCatalogue(disk, cpm_format, false);
return catalogue && catalogue->is_zx_spectrum_booter();
}

32
Storage/Disk/Parsers/CPM.cpp
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@ -15,7 +15,7 @@
using namespace Storage::Disk::CPM;
std::unique_ptr<Storage::Disk::CPM::Catalogue> Storage::Disk::CPM::GetCatalogue(const std::shared_ptr<Storage::Disk::Disk> &disk, const ParameterBlock &parameters) {
std::unique_ptr<Storage::Disk::CPM::Catalogue> Storage::Disk::CPM::GetCatalogue(const std::shared_ptr<Storage::Disk::Disk> &disk, const ParameterBlock &parameters, bool with_contents) {
Storage::Encodings::MFM::Parser parser(Encodings::MFM::Density::Double, disk);
// Assemble the actual bytes of the catalogue.
@ -87,38 +87,42 @@ std::unique_ptr<Storage::Disk::CPM::Catalogue> Storage::Disk::CPM::GetCatalogue(
// Sort the catalogue entries and then map to files.
std::sort(catalogue_entries.begin(), catalogue_entries.end());
std::unique_ptr<Catalogue> result(new Catalogue);
auto result = std::make_unique<Catalogue>();
bool has_long_allocation_units = (parameters.tracks * parameters.sectors_per_track * int(sector_size) / parameters.block_size) >= 256;
std::size_t bytes_per_catalogue_entry = (has_long_allocation_units ? 8 : 16) * size_t(parameters.block_size);
int sectors_per_block = parameters.block_size / int(sector_size);
int records_per_sector = int(sector_size) / 128;
result->files.reserve(catalogue_entries.size());
auto entry = catalogue_entries.begin();
while(entry != catalogue_entries.end()) {
// Find final catalogue entry that relates to the same file.
auto final_entry = entry + 1;
while(final_entry != catalogue_entries.end() && final_entry->is_same_file(*entry)) {
final_entry++;
}
final_entry--;
// Find first catalogue entry that relates to a different file.
auto final_entry = entry;
do {
++final_entry;
} while(final_entry != catalogue_entries.end() && final_entry->is_same_file(*entry));
// Create file.
result->files.emplace_back();
File &new_file = result->files.back();
File &new_file = result->files.emplace_back();
new_file.user_number = entry->user_number;
new_file.name = std::move(entry->name);
new_file.type = std::move(entry->type);
new_file.read_only = entry->read_only;
new_file.system = entry->system;
// Skip contents if not required.
if(!with_contents) {
entry = final_entry;
continue;
}
// Create storage for data.
std::size_t required_size = final_entry->extent * bytes_per_catalogue_entry + size_t(final_entry->number_of_records) * 128;
new_file.data.resize(required_size);
// Accumulate all data.
while(entry <= final_entry) {
while(entry != final_entry) {
int record = 0;
int number_of_records = (entry->number_of_records != 0x80) ? entry->number_of_records : (has_long_allocation_units ? 8 : 16);
for(std::size_t block = 0; block < (has_long_allocation_units ? 8 : 16) && record < number_of_records; block++) {
@ -152,7 +156,7 @@ std::unique_ptr<Storage::Disk::CPM::Catalogue> Storage::Disk::CPM::GetCatalogue(
}
}
entry++;
++entry;
}
}
@ -164,7 +168,7 @@ bool Catalogue::is_zx_spectrum_booter() {
const auto file = std::find_if(files.begin(), files.end(), [](const auto &file) { return file.name == "DISK "; });
if(file == files.end()) return false;
// TODO: check the file is valid ZX Spectrum BASIC.
// TODO: check the file is valid ZX Spectrum BASIC if it has contents.
return true;
}

2
Storage/Disk/Parsers/CPM.hpp
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@ -64,6 +64,6 @@ struct Catalogue {
bool is_zx_spectrum_booter();
};
std::unique_ptr<Catalogue> GetCatalogue(const std::shared_ptr<Storage::Disk::Disk> &disk, const ParameterBlock &parameters);
std::unique_ptr<Catalogue> GetCatalogue(const std::shared_ptr<Storage::Disk::Disk> &disk, const ParameterBlock &parameters, bool with_contents);
}