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https://github.com/CTCaer/hekate.git
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185526d134
BDK will allow developers to use the full collection of drivers, with limited editing, if any, for making payloads for Nintendo Switch. Using a single source for everything will also help decoupling Switch specific code and easily port it to other Tegra X1/X1+ platforms. And maybe even to lower targets. Everything is now centrilized into bdk folder. Every module or project can utilize it by simply including it. This is just the start and it will continue to improve.
276 lines
8.2 KiB
C
276 lines
8.2 KiB
C
/**
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* @file lv_fs.h
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*
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*/
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#ifndef LV_FS_H
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#define LV_FS_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*********************
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* INCLUDES
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*********************/
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#ifdef LV_CONF_INCLUDE_SIMPLE
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#include "lv_conf.h"
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#else
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#include "../../lv_conf.h"
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#endif
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#if USE_LV_FILESYSTEM
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#include <stdint.h>
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#include "lv_mem.h"
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/*********************
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* DEFINES
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*********************/
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#define LV_FS_MAX_FN_LENGTH 64
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/**********************
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* TYPEDEFS
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**********************/
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enum
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{
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LV_FS_RES_OK = 0,
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LV_FS_RES_HW_ERR, /*Low level hardware error*/
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LV_FS_RES_FS_ERR, /*Error in the file system structure */
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LV_FS_RES_NOT_EX, /*Driver, file or directory is not exists*/
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LV_FS_RES_FULL, /*Disk full*/
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LV_FS_RES_LOCKED, /*The file is already opened*/
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LV_FS_RES_DENIED, /*Access denied. Check 'fs_open' modes and write protect*/
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LV_FS_RES_BUSY, /*The file system now can't handle it, try later*/
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LV_FS_RES_TOUT, /*Process time outed*/
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LV_FS_RES_NOT_IMP, /*Requested function is not implemented*/
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LV_FS_RES_OUT_OF_MEM, /*Not enough memory for an internal operation*/
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LV_FS_RES_INV_PARAM, /*Invalid parameter among arguments*/
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LV_FS_RES_UNKNOWN, /*Other unknown error*/
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};
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typedef uint8_t lv_fs_res_t;
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struct __lv_fs_drv_t;
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typedef struct
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{
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void * file_d;
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struct __lv_fs_drv_t* drv;
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} lv_fs_file_t;
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typedef struct
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{
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void * dir_d;
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struct __lv_fs_drv_t * drv;
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} lv_fs_dir_t;
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enum
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{
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LV_FS_MODE_WR = 0x01,
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LV_FS_MODE_RD = 0x02,
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};
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typedef uint8_t lv_fs_mode_t;
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typedef struct __lv_fs_drv_t
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{
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char letter;
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uint16_t file_size;
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uint16_t rddir_size;
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bool (*ready) (void);
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lv_fs_res_t (*open) (void * file_p, const char * path, lv_fs_mode_t mode);
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lv_fs_res_t (*close) (void * file_p);
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lv_fs_res_t (*remove) (const char * fn);
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lv_fs_res_t (*read) (void * file_p, void * buf, uint32_t btr, uint32_t * br);
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lv_fs_res_t (*write) (void * file_p, const void * buf, uint32_t btw, uint32_t * bw);
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lv_fs_res_t (*seek) (void * file_p, uint32_t pos);
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lv_fs_res_t (*tell) (void * file_p, uint32_t * pos_p);
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lv_fs_res_t (*trunc) (void * file_p);
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lv_fs_res_t (*size) (void * file_p, uint32_t * size_p);
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lv_fs_res_t (*rename) (const char * oldname, const char * newname);
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lv_fs_res_t (*free) (uint32_t * total_p, uint32_t * free_p);
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lv_fs_res_t (*dir_open) (void * rddir_p, const char * path);
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lv_fs_res_t (*dir_read) (void * rddir_p, char * fn);
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lv_fs_res_t (*dir_close) (void * rddir_p);
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} lv_fs_drv_t;
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/**********************
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* GLOBAL PROTOTYPES
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**********************/
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/**
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* Initialize the File system interface
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*/
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void lv_fs_init(void);
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/**
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* Add a new drive
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* @param drv_p pointer to an lv_fs_drv_t structure which is inited with the
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* corresponding function pointers. The data will be copied so the variable can be local.
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*/
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void lv_fs_add_drv(lv_fs_drv_t * drv_p);
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/**
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* Test if a drive is rady or not. If the `ready` function was not initialized `true` will be returned.
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* @param letter letter of the drive
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* @return true: drive is ready; false: drive is not ready
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*/
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bool lv_fs_is_ready(char letter);
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/**
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* Open a file
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* @param file_p pointer to a lv_fs_file_t variable
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* @param path path to the file beginning with the driver letter (e.g. S:/folder/file.txt)
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* @param mode read: FS_MODE_RD, write: FS_MODE_WR, both: FS_MODE_RD | FS_MODE_WR
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* @return LV_FS_RES_OK or any error from lv_fs_res_t enum
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*/
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lv_fs_res_t lv_fs_open (lv_fs_file_t * file_p, const char * path, lv_fs_mode_t mode);
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/**
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* Close an already opened file
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* @param file_p pointer to a lv_fs_file_t variable
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* @return LV_FS_RES_OK or any error from lv_fs_res_t enum
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*/
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lv_fs_res_t lv_fs_close (lv_fs_file_t * file_p);
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/**
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* Delete a file
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* @param path path of the file to delete
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* @return LV_FS_RES_OK or any error from lv_fs_res_t enum
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*/
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lv_fs_res_t lv_fs_remove (const char * path);
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/**
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* Read from a file
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* @param file_p pointer to a lv_fs_file_t variable
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* @param buf pointer to a buffer where the read bytes are stored
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* @param btr Bytes To Read
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* @param br the number of real read bytes (Bytes Read). NULL if unused.
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* @return LV_FS_RES_OK or any error from lv_fs_res_t enum
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*/
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lv_fs_res_t lv_fs_read (lv_fs_file_t * file_p, void * buf, uint32_t btr, uint32_t * br);
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/**
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* Write into a file
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* @param file_p pointer to a lv_fs_file_t variable
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* @param buf pointer to a buffer with the bytes to write
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* @param btr Bytes To Write
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* @param br the number of real written bytes (Bytes Written). NULL if unused.
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* @return LV_FS_RES_OK or any error from lv_fs_res_t enum
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*/
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lv_fs_res_t lv_fs_write (lv_fs_file_t * file_p, const void * buf, uint32_t btw, uint32_t * bw);
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/**
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* Set the position of the 'cursor' (read write pointer) in a file
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* @param file_p pointer to a lv_fs_file_t variable
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* @param pos the new position expressed in bytes index (0: start of file)
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* @return LV_FS_RES_OK or any error from lv_fs_res_t enum
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*/
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lv_fs_res_t lv_fs_seek (lv_fs_file_t * file_p, uint32_t pos);
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/**
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* Give the position of the read write pointer
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* @param file_p pointer to a lv_fs_file_t variable
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* @param pos_p pointer to store the position of the read write pointer
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* @return LV_FS_RES_OK or any error from 'fs_res_t'
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*/
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lv_fs_res_t lv_fs_tell (lv_fs_file_t * file_p, uint32_t * pos);
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/**
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* Truncate the file size to the current position of the read write pointer
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* @param file_p pointer to an 'ufs_file_t' variable. (opened with lv_fs_open )
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* @return LV_FS_RES_OK: no error, the file is read
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* any error from lv_fs_res_t enum
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*/
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lv_fs_res_t lv_fs_trunc (lv_fs_file_t * file_p);
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/**
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* Give the size of a file bytes
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* @param file_p pointer to a lv_fs_file_t variable
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* @param size pointer to a variable to store the size
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* @return LV_FS_RES_OK or any error from lv_fs_res_t enum
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*/
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lv_fs_res_t lv_fs_size (lv_fs_file_t * file_p, uint32_t * size);
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/**
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* Rename a file
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* @param oldname path to the file
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* @param newname path with the new name
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* @return LV_FS_RES_OK or any error from 'fs_res_t'
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*/
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lv_fs_res_t lv_fs_rename (const char * oldname, const char * newname);
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/**
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* Initialize a 'fs_dir_t' variable for directory reading
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* @param rddir_p pointer to a 'fs_read_dir_t' variable
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* @param path path to a directory
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* @return LV_FS_RES_OK or any error from lv_fs_res_t enum
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*/
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lv_fs_res_t lv_fs_dir_open(lv_fs_dir_t * rddir_p, const char * path);
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/**
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* Read the next filename form a directory.
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* The name of the directories will begin with '/'
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* @param rddir_p pointer to an initialized 'fs_rdir_t' variable
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* @param fn pointer to a buffer to store the filename
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* @return LV_FS_RES_OK or any error from lv_fs_res_t enum
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*/
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lv_fs_res_t lv_fs_dir_read (lv_fs_dir_t * rddir_p, char * fn);
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/**
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* Close the directory reading
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* @param rddir_p pointer to an initialized 'fs_dir_t' variable
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* @return LV_FS_RES_OK or any error from lv_fs_res_t enum
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*/
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lv_fs_res_t lv_fs_dir_close (lv_fs_dir_t * rddir_p);
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/**
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* Get the free and total size of a driver in kB
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* @param letter the driver letter
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* @param total_p pointer to store the total size [kB]
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* @param free_p pointer to store the free size [kB]
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* @return LV_FS_RES_OK or any error from lv_fs_res_t enum
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*/
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lv_fs_res_t lv_fs_free (char letter, uint32_t * total_p, uint32_t * free_p);
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/**
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* Fill a buffer with the letters of existing drivers
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* @param buf buffer to store the letters ('\0' added after the last letter)
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* @return the buffer
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*/
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char * lv_fs_get_letters(char * buf);
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/**
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* Return with the extension of the filename
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* @param fn string with a filename
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* @return pointer to the beginning extension or empty string if no extension
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*/
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const char * lv_fs_get_ext(const char * fn);
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/**
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* Step up one level
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* @param path pointer to a file name
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* @return the truncated file name
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*/
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char * lv_fs_up(char * path);
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/**
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* Get the last element of a path (e.g. U:/folder/file -> file)
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* @param buf buffer to store the letters ('\0' added after the last letter)
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* @return pointer to the beginning of the last element in the path
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*/
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const char * lv_fs_get_last(const char * path);
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/**********************
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* MACROS
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**********************/
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#endif /*USE_LV_FILESYSTEM*/
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /*LV_FS_H*/
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