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Made an absolutely basic attempt to accommodate some extended disk images.

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This commit is contained in:
Thomas Harte 2017-08-07 11:26:15 -04:00
parent 68c73184b1
commit a294963e98
1 changed files with 16 additions and 17 deletions
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13
Storage/Disk/Formats/CPCDSK.cpp
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@ -83,6 +83,7 @@ std::shared_ptr<Track> CPCDSK::get_uncached_track_at_position(unsigned int head,
size_t length;
uint8_t status1;
uint8_t status2;
size_t actual_length;
};
std::vector<SectorInfo> sector_infos;
while(number_of_sectors--) {
@ -95,24 +96,23 @@ std::shared_ptr<Track> CPCDSK::get_uncached_track_at_position(unsigned int head,
if(new_sector.length == 0x2000) new_sector.length = 0x1800;
new_sector.status1 = (uint8_t)fgetc(file_);
new_sector.status2 = (uint8_t)fgetc(file_);
fseek(file_, 2, SEEK_CUR);
new_sector.actual_length = fgetc16le();
sector_infos.push_back(new_sector);
}
// Get the sectors.
fseek(file_, file_offset + 0x100, SEEK_SET);
if(is_extended_) {
// TODO: everything about extended disk images
} else {
std::vector<Storage::Encodings::MFM::Sector> sectors;
for(auto &sector_info : sector_infos) {
Storage::Encodings::MFM::Sector new_sector;
new_sector.track = sector_info.track;
new_sector.side = sector_info.side;
new_sector.sector = sector_info.sector;
new_sector.data.resize(sector_info.length);
fread(new_sector.data.data(), sizeof(uint8_t), sector_info.length, file_);
size_t data_size = is_extended_ ? sector_info.actual_length : sector_info.length;
new_sector.data.resize(data_size);
fread(new_sector.data.data(), sizeof(uint8_t), data_size, file_);
// TODO: obey the status bytes, somehow (?)
@ -121,7 +121,6 @@ std::shared_ptr<Track> CPCDSK::get_uncached_track_at_position(unsigned int head,
// TODO: supply gay 3 length and filler byte
if(sectors.size()) return Storage::Encodings::MFM::GetMFMTrackWithSectors(sectors);
}
return nullptr;
}