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Improves validation of suspected sync regions.

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This commit is contained in:
Thomas Harte 2018-04-27 19:53:35 -04:00
parent 41075356e2
commit 992a99d792
1 changed files with 9 additions and 4 deletions
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7
Storage/Disk/DiskImage/Formats/NIB.cpp
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@ -60,14 +60,19 @@ std::shared_ptr<::Storage::Disk::Track> NIB::get_track_at_position(::Storage::Di
for(size_t index = 0; index < track_data.size(); ++index) { for(size_t index = 0; index < track_data.size(); ++index) {
if(track_data[index] == 0xd5 && track_data[(index+1)%track_data.size()] == 0xaa) { if(track_data[index] == 0xd5 && track_data[(index+1)%track_data.size()] == 0xaa) {
size_t start = index - 1; size_t start = index - 1;
while(track_data[start] == 0xff) size_t length = 0;
while(track_data[start] == 0xff) {
start = (start + track_data.size() - 1) % track_data.size(); start = (start + track_data.size() - 1) % track_data.size();
++length;
}
if(length >= 5) {
sync_starts.insert((start + 1) % track_data.size()); sync_starts.insert((start + 1) % track_data.size());
if(start > index) if(start > index)
start_index = start; start_index = start;
} }
} }
}
if(start_index) if(start_index)
segments.push_back(Encodings::AppleGCR::six_and_two_sync(static_cast<int>(start_index))); segments.push_back(Encodings::AppleGCR::six_and_two_sync(static_cast<int>(start_index)));