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 * index stays unaltered, while the internal FAT "physical tree address"
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 * index stays unaltered, while the internal FAT "physical tree address"
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 * changes.  The unlink case is also handled this way thanks to an in-core node
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 * changes.  The unlink case is also handled this way thanks to an in-core node
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 * pointer embedded in the index structure.
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 * pointer embedded in the index structure.
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 */
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 */
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typedef struct {
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typedef struct {
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    /** Used indices (position) hash table link. */
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    link_t      uph_link;
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    /** Used indices hash table link. */
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    /** Used indices (index) hash table link. */
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    link_t      uh_link;
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    link_t      uih_link;
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    dev_handle_t    dev_handle;
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    dev_handle_t    dev_handle;
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    fs_index_t  index;
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    fs_index_t  index;
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    /**
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    /**
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     * Parent node's first cluster.
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     * Parent node's first cluster.
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extern fs_reg_t fat_reg;
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extern fs_reg_t fat_reg;
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extern void fat_lookup(ipc_callid_t, ipc_call_t *);
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extern void fat_lookup(ipc_callid_t, ipc_call_t *);
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extern fat_idx_t *fat_idx_map(dev_handle_t, fat_cluster_t, unsigned);
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extern fat_idx_t *fat_idx_get_by_pos(dev_handle_t, fat_cluster_t, unsigned);
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extern fat_idx_t *fat_idx_get_by_index(dev_handle_t, fs_index_t);
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#endif
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#endif
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/**
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/**
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 * @}
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 * @}