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Update DDT entry documentation to indicate 64-bit values

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Natalia Portillo
2025-10-11 01:34:22 +01:00
parent 2e11b05547
commit 61850a9520
6 changed files with 16 additions and 31 deletions
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6
include/aaruformat/structs/ddt.h
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@@ -93,11 +93,11 @@ typedef struct DdtHeader
* secondaryIndex = I % itemsPerPrimaryEntry
* The primary table entry at primaryIndex yields a secondary DDT file offset (scaled by 2^blockAlignmentShift),
* whose table entries are then indexed by secondaryIndex.
* 3. Read raw DDT entry value E (16-bit if sizeType == SmallDdtSizeType, 32-bit if BigDdtSizeType).
* 3. Read raw DDT entry value E (64-bit).
* 4. If E == 0: sector_status = SectorStatusNotDumped; offset=block_offset=0.
* Otherwise extract:
* statusBits = E >> 12 (small) or E >> 28 (big)
* baseBits = E & 0x0FFF (small) or E & 0x0FFFFFFF (big)
* statusBits = E >> 60
* baseBits = E & 0xFFFFFFFFFFFFFFF
* sectorOffsetWithinBlock = baseBits & ((1 << dataShift) - 1)
* blockIndex = baseBits >> dataShift
* block_offset (bytes) = blockIndex << blockAlignmentShift