mdl_storage_vfs.h

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#pragma once
 
#ifdef __cplusplus
extern "C" {
#endif
 
#include <stdint.h>
 
#include "ra8_c6link_mdl_transfer.h"
#include "ra8_io_vfs.h"

typedef enum : uint16_t {
  k_mdl_storage_vfs_path_capacity       = 768, 
  k_mdl_storage_vfs_stage_leaf_capacity = 32,  
} mdl_storage_vfs_limits_t;

typedef ra8_err_t (*mdl_storage_vfs_validate_fn)(void*         ctx,
                                                 const char*   staging_path,
                                                 uint64_t      total_bytes,
                                                 const uint8_t sha256[k_ra8_mdl_sha256_bytes]);

typedef struct {
  const char*                 stage_leaf;   
  mdl_storage_vfs_validate_fn validate;     
  void*                       validate_ctx; 
} mdl_storage_vfs_config_t;

typedef enum : uint8_t {
  k_mdl_storage_vfs_idle      = 0, 
  k_mdl_storage_vfs_writing   = 1, 
  k_mdl_storage_vfs_staged    = 2, 
  k_mdl_storage_vfs_ready     = 3, 
  k_mdl_storage_vfs_committed = 4, 
} mdl_storage_vfs_state_t;

typedef struct {
  ra8_io_vfs_file_t* file;
  mdl_storage_vfs_validate_fn validate;
  void* validate_ctx;
  uint64_t bytes_written;
  mdl_storage_vfs_state_t state;
  char stage_leaf[k_mdl_storage_vfs_stage_leaf_capacity];
  char destination[k_mdl_storage_vfs_path_capacity];
  char staging_path[k_mdl_storage_vfs_path_capacity];
} mdl_storage_vfs_t;

[[nodiscard]] ra8_err_t mdl_storage_vfs_init(mdl_storage_vfs_t*              storage,
                                             const mdl_storage_vfs_config_t* config,
                                             ra8_mdl_storage_iface_t*        out_iface);
 
#ifdef __cplusplus
}
#endif