ra8_fs_fat_lfn_write_internal.h

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#pragma once
 
#include "ra8_attributes.h"
#include "ra8_fs_fat_types_internal.h"
 
/* ===========================================================================
 * The name domain: what shape a leaf needs, and what alias it is filed under.
 * ===========================================================================
 */

RA8_PRIV
ra8_fs_name_kind_t priv_name_classify(const char* leaf,
                                      uint16_t*   out_units,
                                      uint32_t*   out_nunits,
                                      uint8_t*    out83,
                                      uint8_t*    out_ntres);

RA8_PRIV
void priv_lfn_alias_basis(const uint16_t* leaf, uint32_t n, uint32_t tail, uint8_t* out11);
 
/* ===========================================================================
 * The entry domain: one long-name slot, and the checksum that binds the chain.
 * ===========================================================================
 */

RA8_PRIV
uint8_t priv_sfn_checksum(const uint8_t* name83);

RA8_PRIV
void priv_lfn_fill_slot(uint8_t*        ent,
                        const uint16_t* name,
                        uint32_t        nlen,
                        uint32_t        order,
                        uint8_t         is_last,
                        uint8_t         csum);
 
/* ===========================================================================
 * The directory domain: reserve, commit, look up, erase.
 * ===========================================================================
 */

RA8_PRIV
ra8_err_t priv_dir_find_free_run(const ra8_fs_mount_t* m,
                                 const dir_loc_t*      loc,
                                 uint32_t              need,
                                 dir_slot_t*           out);

RA8_PRIV
ra8_err_t priv_dir_reserve(const ra8_fs_mount_t* m,
                           const dir_loc_t*      loc,
                           const char*           leaf,
                           dir_insert_t*         out);

RA8_PRIV
ra8_err_t priv_dir_commit(const ra8_fs_mount_t* m,
                          const dir_insert_t*   plan,
                          const uint8_t*        tmpl,
                          uint64_t*             out_lba,
                          uint32_t*             out_off);

RA8_PRIV
ra8_err_t priv_dir_lookup_any(const ra8_fs_mount_t* m,
                              const dir_loc_t*      loc,
                              const char*           leaf,
                              uint64_t*             out_lba,
                              uint32_t*             out_off,
                              uint8_t               out_entry[k_ra8_fs_dir_entry_bytes]);

RA8_PRIV
ra8_err_t priv_dir_erase_chain(const ra8_fs_mount_t* m,
                               const dir_loc_t*      loc,
                               uint64_t              lba,
                               uint32_t              off,
                               const uint8_t*        name83);