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Kernel/FileSystem/FATFS: Support FAT12 file system clusters

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Taj Morton 2023-07-30 17:31:28 -07:00 • committed by Andrew Kaster
parent 1f70a728f0
commit 2995ee5858
2 changed files with 40 additions and 19 deletions
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5
Kernel/FileSystem/FATFS/Inode.h
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@ -30,8 +30,7 @@ public:
private:
FATInode(FATFS&, FATEntry, NonnullOwnPtr<KString> filename);
// Number of bytes used to store a cluster within the table.
size_t cluster_size() const;
size_t fat_offset_for_cluster(u32 cluster) const;
// Returns cluster number value that indicates the end of the chain
// has been reached. Any cluster value >= this value indicates this
@ -39,7 +38,7 @@ private:
u32 end_of_chain_marker() const;
// Reads the cluster number located at the offset within the table.
u32 cluster_number(KBuffer const& fat_sector, u32 entry_offset) const;
u32 cluster_number(KBuffer const& fat_sector, u32 entry_cluster_number, u32 entry_offset) const;
static constexpr u8 end_entry_byte = 0x00;
static constexpr u8 unused_entry_byte = 0xE5;