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D88: Use the data length field to seek past any extra data.

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This will effectively ignore the field length if it is shorter
than the sector size (or 0).
This commit is contained in:
Thomas Daede
2022-08-18 15:21:31 -07:00
parent 0ddfd3bead
commit f8257e697a
1 changed files with 5 additions and 0 deletions
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5
lib/imagereader/d88imagereader.cc
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@@ -115,6 +115,10 @@ public:
int ddam = sectorHeaderReader.seek(7).read_8();
int fddStatusCode = sectorHeaderReader.seek(8).read_8();
int rpm = sectorHeaderReader.seek(13).read_8();
int dataLength = sectorHeaderReader.seek(14).read_le16();
if (dataLength < sectorSize) {
dataLength = sectorSize;
}
// D88 provides much more sector information that is currently
// ignored
if (ddam != 0)
@@ -190,6 +194,7 @@ public:
}
Bytes data(sectorSize);
inputFile.read((char*)data.begin(), data.size());
inputFile.seekg(dataLength-sectorSize, std::ios_base::cur);
physical->add_sector(sectorId);
const auto& sector = image->put(track, head, sectorId);
sector->status = Sector::OK;