[VFS] Port new BlockToOffsetSTFS algo from stfs-headers
65ca664fdb
This should give better compatibility with CON packages - ie. profiles taken from actual consoles should hopefully extract properly without errors, now there's shouldn't be any need for extracting them with Velocity/Horizon first.
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@ -591,10 +591,43 @@ StfsContainerDevice::Error StfsContainerDevice::ReadSTFS() {
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}
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}
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if (all_entries.size() > 0) {
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return Error::kSuccess;
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}
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// Failed to load any entries, try with old algo if we haven't already
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if (!use_old_algorithm_) {
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use_old_algorithm_ = true;
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return ReadSTFS();
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}
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// Tried with old algo and still no entries... return failure
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return Error::kErrorReadError;
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}
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size_t StfsContainerDevice::BlockToOffsetSTFS(uint64_t block_index) {
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if (use_old_algorithm_) {
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return BlockToOffsetSTFS_Old(block_index);
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}
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uint32_t num_tables = 1; // num hashtables per block? or maybe backingblocks?
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if (((header_.header_size + 0xFFF) & 0xB000) == 0xB000 ||
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(header_.stfs_volume_descriptor.flags & 0x1) == 0x0) {
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num_tables++;
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}
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uint64_t dataBlock = block_index + num_tables * ((block_index + 0xAA) / 0xAA);
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if (block_index >= 170) {
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dataBlock += num_tables * ((block_index + 0x70E4) / 0x70E4);
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if (block_index >= 28900) {
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dataBlock += num_tables * ((block_index + 0x4AF768) / 0x4AF768);
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}
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}
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return xe::round_up(header_.header_size, 0x1000) + (dataBlock * 0x1000);
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}
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size_t StfsContainerDevice::BlockToOffsetSTFS_Old(uint64_t block_index) {
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uint64_t block;
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uint32_t block_shift = 0;
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if (((header_.header_size + 0x0FFF) & 0xB000) == 0xB000 ||
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@ -217,6 +217,7 @@ class StfsContainerDevice : public Device {
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Error ReadSTFS();
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size_t BlockToOffsetSTFS(uint64_t block);
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size_t BlockToOffsetSTFS_Old(uint64_t block);
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BlockHash GetBlockHash(const uint8_t* map_ptr, uint32_t block_index,
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uint32_t table_offset);
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@ -231,6 +232,8 @@ class StfsContainerDevice : public Device {
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StfsPackageType package_type_;
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StfsHeader header_;
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uint32_t table_size_shift_;
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bool use_old_algorithm_ = false;
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};
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} // namespace vfs
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