517 lines
14 KiB
C
517 lines
14 KiB
C
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/**
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* @file lv_ufs.c
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* Implementation of RAM file system which do NOT support directories.
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* The API is compatible with the lv_fs_int module.
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*/
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/*********************
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* INCLUDES
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*********************/
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#include "lv_ufs.h"
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#if USE_LV_FILESYSTEM
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#include "lv_ll.h"
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#include <string.h>
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#include <stdio.h>
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#include <errno.h>
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#include "lv_gc.h"
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#if defined(LV_GC_INCLUDE)
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# include LV_GC_INCLUDE
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#endif /* LV_ENABLE_GC */
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/*********************
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* DEFINES
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*********************/
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/**********************
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* TYPEDEFS
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**********************/
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/**********************
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* STATIC PROTOTYPES
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**********************/
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static lv_ufs_ent_t * lv_ufs_ent_get(const char * fn);
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static lv_ufs_ent_t * lv_ufs_ent_new(const char * fn);
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/**********************
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* STATIC VARIABLES
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**********************/
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static bool inited = false;
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/**********************
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* MACROS
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**********************/
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/**********************
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* GLOBAL FUNCTIONS
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**********************/
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/**
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* Create a driver for ufs and initialize it.
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*/
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void lv_ufs_init(void)
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{
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lv_ll_init(&LV_GC_ROOT(_lv_file_ll), sizeof(lv_ufs_ent_t));
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lv_fs_drv_t ufs_drv;
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memset(&ufs_drv, 0, sizeof(lv_fs_drv_t)); /*Initialization*/
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ufs_drv.file_size = sizeof(lv_ufs_file_t);
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ufs_drv.rddir_size = sizeof(lv_ufs_dir_t);
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ufs_drv.letter = UFS_LETTER;
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ufs_drv.ready = lv_ufs_ready;
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ufs_drv.open = lv_ufs_open;
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ufs_drv.close = lv_ufs_close;
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ufs_drv.remove = lv_ufs_remove;
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ufs_drv.read = lv_ufs_read;
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ufs_drv.write = lv_ufs_write;
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ufs_drv.seek = lv_ufs_seek;
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ufs_drv.tell = lv_ufs_tell;
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ufs_drv.size = lv_ufs_size;
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ufs_drv.trunc = lv_ufs_trunc;
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ufs_drv.free = lv_ufs_free;
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ufs_drv.dir_open = lv_ufs_dir_open;
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ufs_drv.dir_read = lv_ufs_dir_read;
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ufs_drv.dir_close = lv_ufs_dir_close;
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lv_fs_add_drv(&ufs_drv);
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inited = true;
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}
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/**
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* Give the state of the ufs
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* @return true if ufs is initialized and can be used else false
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*/
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bool lv_ufs_ready(void)
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{
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return inited;
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}
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/**
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* Open a file in ufs
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* @param file_p pointer to a lv_ufs_file_t variable
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* @param fn name of the file. There are no directories so e.g. "myfile.txt"
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* @param mode element of 'fs_mode_t' enum or its 'OR' connection (e.g. FS_MODE_WR | FS_MODE_RD)
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* @return LV_FS_RES_OK: no error, the file is opened
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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_ufs_open(void * file_p, const char * fn, lv_fs_mode_t mode)
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{
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lv_ufs_file_t * fp = file_p; /*Convert type*/
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lv_ufs_ent_t * ent = lv_ufs_ent_get(fn);
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fp->ent = NULL;
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/*If the file not exists ...*/
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if(ent == NULL) {
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if((mode & LV_FS_MODE_WR) != 0) { /*Create the file if opened for write*/
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ent = lv_ufs_ent_new(fn);
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if(ent == NULL) return LV_FS_RES_FULL; /*No space for the new file*/
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} else {
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return LV_FS_RES_NOT_EX; /*Can not read not existing file*/
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}
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}
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/*Can not write already opened and const data files*/
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if((mode & LV_FS_MODE_WR) != 0) {
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if(ent->oc != 0) return LV_FS_RES_LOCKED;
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if(ent->const_data != 0) return LV_FS_RES_DENIED;
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}
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/*No error, the file can be opened*/
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fp->ent = ent;
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fp->ar = mode & LV_FS_MODE_RD ? 1 : 0;
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fp->aw = mode & LV_FS_MODE_WR ? 1 : 0;
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fp->rwp = 0;
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ent->oc ++;
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return LV_FS_RES_OK;
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}
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/**
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* Create a file with a constant data
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* @param fn name of the file (directories are not supported)
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* @param const_p pointer to a constant data
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* @param len length of the data pointed by 'const_p' in bytes
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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_ufs_create_const(const char * fn, const void * const_p, uint32_t len)
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{
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lv_ufs_file_t file;
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lv_fs_res_t res;
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/*Error if the file already exists*/
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res = lv_ufs_open(&file, fn, LV_FS_MODE_RD);
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if(res == LV_FS_RES_OK) {
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lv_ufs_close(&file);
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return LV_FS_RES_DENIED;
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}
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lv_ufs_close(&file);
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res = lv_ufs_open(&file, fn, LV_FS_MODE_WR);
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if(res != LV_FS_RES_OK) return res;
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lv_ufs_ent_t * ent = file.ent;
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if(ent->data_d != NULL) return LV_FS_RES_DENIED;
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ent->data_d = (void *) const_p;
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ent->size = len;
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ent->const_data = 1;
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res = lv_ufs_close(&file);
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if(res != LV_FS_RES_OK) return res;
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return LV_FS_RES_OK;
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}
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/**
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* Close an opened file
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* @param file_p pointer to an 'ufs_file_t' variable. (opened with lv_ufs_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_ufs_close(void * file_p)
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{
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lv_ufs_file_t * fp = file_p; /*Convert type*/
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if(fp->ent == NULL) return LV_FS_RES_OK;
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/*Decrement the Open counter*/
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if(fp->ent->oc > 0) {
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fp->ent->oc--;
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}
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return LV_FS_RES_OK;
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}
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/**
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* Remove a file. The file can not be opened.
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* @param fn '\0' terminated string
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* @return LV_FS_RES_OK: no error, the file is removed
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* LV_FS_RES_DENIED: the file was opened, remove failed
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*/
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lv_fs_res_t lv_ufs_remove(const char * fn)
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{
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lv_ufs_ent_t * ent = lv_ufs_ent_get(fn);
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if(ent == NULL) return LV_FS_RES_DENIED; /*File not exists*/
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/*Can not be deleted is opened*/
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if(ent->oc != 0) return LV_FS_RES_DENIED;
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lv_ll_rem(&LV_GC_ROOT(_lv_file_ll), ent);
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lv_mem_free(ent->fn_d);
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ent->fn_d = NULL;
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if(ent->const_data == 0) {
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lv_mem_free(ent->data_d);
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ent->data_d = NULL;
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}
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lv_mem_free(ent);
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return LV_FS_RES_OK;
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}
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/**
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* Read data from an opened file
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* @param file_p pointer to an 'ufs_file_t' variable. (opened with lv_ufs_open )
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* @param buf pointer to a memory block where to store the read data
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* @param btr number of Bytes To Read
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* @param br the real number of read bytes (Byte Read)
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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_ufs_read(void * file_p, void * buf, uint32_t btr, uint32_t * br)
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{
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lv_ufs_file_t * fp = file_p; /*Convert type*/
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lv_ufs_ent_t * ent = fp->ent;
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*br = 0;
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if(ent->data_d == NULL || ent->size == 0) { /*Don't read empty files*/
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return LV_FS_RES_OK;
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} else if(fp->ar == 0) { /*The file is not opened for read*/
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return LV_FS_RES_DENIED;
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}
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/*No error, read the file*/
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if(fp->rwp + btr > ent->size) { /*Check too much bytes read*/
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*br = ent->size - fp->rwp;
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} else {
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*br = btr;
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}
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/*Read the data*/
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uint8_t * data8_p;
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if(ent->const_data == 0) {
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data8_p = (uint8_t *) ent->data_d;
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} else {
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data8_p = ent->data_d;
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}
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data8_p += fp->rwp;
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memcpy(buf, data8_p, *br);
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fp->rwp += *br; /*Refresh the read write pointer*/
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return LV_FS_RES_OK;
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}
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/**
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* Write data to an opened file
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* @param file_p pointer to an 'ufs_file_t' variable. (opened with lv_ufs_open)
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* @param buf pointer to a memory block which content will be written
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* @param btw the number Bytes To Write
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* @param bw The real number of written bytes (Byte Written)
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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_ufs_write(void * file_p, const void * buf, uint32_t btw, uint32_t * bw)
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{
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lv_ufs_file_t * fp = file_p; /*Convert type*/
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*bw = 0;
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if(fp->aw == 0) return LV_FS_RES_DENIED; /*Not opened for write*/
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lv_ufs_ent_t * ent = fp->ent;
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/*Reallocate data array if it necessary*/
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uint32_t new_size = fp->rwp + btw;
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if(new_size > ent->size) {
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uint8_t * new_data = lv_mem_realloc(ent->data_d, new_size);
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lv_mem_assert(new_data);
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if(new_data == NULL) return LV_FS_RES_FULL; /*Cannot allocate the new memory*/
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ent->data_d = new_data;
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ent->size = new_size;
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}
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/*Write the file*/
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uint8_t * data8_p = (uint8_t *) ent->data_d;
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data8_p += fp->rwp;
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memcpy(data8_p, buf, btw);
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*bw = btw;
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fp->rwp += *bw;
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return LV_FS_RES_OK;
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}
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/**
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* Set the read write pointer. Also expand the file size if necessary.
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* @param file_p pointer to an 'ufs_file_t' variable. (opened with lv_ufs_open )
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* @param pos the new position of read write pointer
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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_ufs_seek(void * file_p, uint32_t pos)
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{
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lv_ufs_file_t * fp = file_p; /*Convert type*/
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lv_ufs_ent_t * ent = fp->ent;
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/*Simply move the rwp before EOF*/
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if(pos < ent->size) {
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fp->rwp = pos;
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} else { /*Expand the file size*/
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if(fp->aw == 0) return LV_FS_RES_DENIED; /*Not opened for write*/
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uint8_t * new_data = lv_mem_realloc(ent->data_d, pos);
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lv_mem_assert(new_data);
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if(new_data == NULL) return LV_FS_RES_FULL; /*Out of memory*/
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ent->data_d = new_data;
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ent->size = pos;
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fp->rwp = pos;
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}
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return LV_FS_RES_OK;
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}
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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 an 'ufs_file_t' variable. (opened with lv_ufs_open )
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* @param pos_p pointer to to store the result
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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_ufs_tell(void * file_p, uint32_t * pos_p)
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{
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lv_ufs_file_t * fp = file_p; /*Convert type*/
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*pos_p = fp->rwp;
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return LV_FS_RES_OK;
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}
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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_ufs_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_ufs_trunc(void * file_p)
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{
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lv_ufs_file_t * fp = file_p; /*Convert type*/
|
||
|
|
lv_ufs_ent_t * ent = fp->ent;
|
||
|
|
|
||
|
|
if(fp->aw == 0) return LV_FS_RES_DENIED; /*Not opened for write*/
|
||
|
|
|
||
|
|
void * new_data = lv_mem_realloc(ent->data_d, fp->rwp);
|
||
|
|
lv_mem_assert(new_data);
|
||
|
|
if(new_data == NULL) return LV_FS_RES_FULL; /*Out of memory*/
|
||
|
|
|
||
|
|
ent->data_d = new_data;
|
||
|
|
ent->size = fp->rwp;
|
||
|
|
|
||
|
|
return LV_FS_RES_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Give the size of the file in bytes
|
||
|
|
* @param file_p file_p pointer to an 'ufs_file_t' variable. (opened with lv_ufs_open )
|
||
|
|
* @param size_p pointer to store the size
|
||
|
|
* @return LV_FS_RES_OK: no error, the file is read
|
||
|
|
* any error from lv__fs_res_t enum
|
||
|
|
*/
|
||
|
|
lv_fs_res_t lv_ufs_size(void * file_p, uint32_t * size_p)
|
||
|
|
{
|
||
|
|
lv_ufs_file_t * fp = file_p; /*Convert type*/
|
||
|
|
lv_ufs_ent_t * ent = fp->ent;
|
||
|
|
|
||
|
|
*size_p = ent->size;
|
||
|
|
|
||
|
|
return LV_FS_RES_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Initialize a lv_ufs_read_dir_t variable to directory reading
|
||
|
|
* @param rddir_p pointer to a 'ufs_dir_t' variable
|
||
|
|
* @param path uFS doesn't support folders so it has to be ""
|
||
|
|
* @return LV_FS_RES_OK or any error from lv__fs_res_t enum
|
||
|
|
*/
|
||
|
|
lv_fs_res_t lv_ufs_dir_open(void * rddir_p, const char * path)
|
||
|
|
{
|
||
|
|
lv_ufs_dir_t * lv_ufs_rddir_p = rddir_p;
|
||
|
|
|
||
|
|
lv_ufs_rddir_p->last_ent = NULL;
|
||
|
|
|
||
|
|
if(path[0] != '\0') return LV_FS_RES_NOT_EX; /*Must be "" */
|
||
|
|
else return LV_FS_RES_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Read the next file name
|
||
|
|
* @param dir_p pointer to an initialized 'ufs_dir_t' variable
|
||
|
|
* @param fn pointer to buffer to sore the file name
|
||
|
|
* @return LV_FS_RES_OK or any error from lv__fs_res_t enum
|
||
|
|
*/
|
||
|
|
lv_fs_res_t lv_ufs_dir_read(void * dir_p, char * fn)
|
||
|
|
{
|
||
|
|
lv_ufs_dir_t * ufs_dir_p = dir_p;
|
||
|
|
|
||
|
|
if(ufs_dir_p->last_ent == NULL) {
|
||
|
|
ufs_dir_p->last_ent = lv_ll_get_head(&LV_GC_ROOT(_lv_file_ll));
|
||
|
|
} else {
|
||
|
|
ufs_dir_p->last_ent = lv_ll_get_next(&LV_GC_ROOT(_lv_file_ll), ufs_dir_p->last_ent);
|
||
|
|
}
|
||
|
|
|
||
|
|
if(ufs_dir_p->last_ent != NULL) {
|
||
|
|
strcpy(fn, ufs_dir_p->last_ent->fn_d);
|
||
|
|
} else {
|
||
|
|
fn[0] = '\0';
|
||
|
|
}
|
||
|
|
|
||
|
|
return LV_FS_RES_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Close the directory reading
|
||
|
|
* @param rddir_p pointer to an initialized 'ufs_dir_t' variable
|
||
|
|
* @return LV_FS_RES_OK or any error from lv__fs_res_t enum
|
||
|
|
*/
|
||
|
|
lv_fs_res_t lv_ufs_dir_close(void * rddir_p)
|
||
|
|
{
|
||
|
|
(void)rddir_p;
|
||
|
|
return LV_FS_RES_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Give the size of a drive
|
||
|
|
* @param total_p pointer to store the total size [kB]
|
||
|
|
* @param free_p pointer to store the free site [kB]
|
||
|
|
* @return LV_FS_RES_OK or any error from 'lv_fs_res_t'
|
||
|
|
*/
|
||
|
|
lv_fs_res_t lv_ufs_free(uint32_t * total_p, uint32_t * free_p)
|
||
|
|
{
|
||
|
|
|
||
|
|
#if LV_MEM_CUSTOM == 0
|
||
|
|
lv_mem_monitor_t mon;
|
||
|
|
|
||
|
|
lv_mem_monitor(&mon);
|
||
|
|
*total_p = LV_MEM_SIZE >> 10; /*Convert bytes to kB*/
|
||
|
|
*free_p = mon.free_size >> 10;
|
||
|
|
#else
|
||
|
|
*free_p = 0;
|
||
|
|
#endif
|
||
|
|
return LV_FS_RES_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**********************
|
||
|
|
* STATIC FUNCTIONS
|
||
|
|
**********************/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Gives the lv_ufs_entry from a filename
|
||
|
|
* @param fn filename ('\0' terminated string)
|
||
|
|
* @return pointer to the dynamically allocated entry with 'fn' filename.
|
||
|
|
* NULL if no entry found with that name.
|
||
|
|
*/
|
||
|
|
static lv_ufs_ent_t * lv_ufs_ent_get(const char * fn)
|
||
|
|
{
|
||
|
|
lv_ufs_ent_t * fp;
|
||
|
|
|
||
|
|
LL_READ(LV_GC_ROOT(_lv_file_ll), fp) {
|
||
|
|
if(strcmp(fp->fn_d, fn) == 0) {
|
||
|
|
return fp;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Create a new entry with 'fn' filename
|
||
|
|
* @param fn filename ('\0' terminated string)
|
||
|
|
* @return pointer to the dynamically allocated new entry.
|
||
|
|
* NULL if no space for the entry.
|
||
|
|
*/
|
||
|
|
static lv_ufs_ent_t * lv_ufs_ent_new(const char * fn)
|
||
|
|
{
|
||
|
|
lv_ufs_ent_t * new_ent = NULL;
|
||
|
|
new_ent = lv_ll_ins_head(&LV_GC_ROOT(_lv_file_ll)); /*Create a new file*/
|
||
|
|
lv_mem_assert(new_ent);
|
||
|
|
if(new_ent == NULL) return NULL;
|
||
|
|
|
||
|
|
new_ent->fn_d = lv_mem_alloc(strlen(fn) + 1); /*Save the name*/
|
||
|
|
lv_mem_assert(new_ent->fn_d);
|
||
|
|
if(new_ent->fn_d == NULL) return NULL;
|
||
|
|
|
||
|
|
strcpy(new_ent->fn_d, fn);
|
||
|
|
new_ent->data_d = NULL;
|
||
|
|
new_ent->size = 0;
|
||
|
|
new_ent->oc = 0;
|
||
|
|
new_ent->const_data = 0;
|
||
|
|
|
||
|
|
return new_ent;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /*USE_LV_FILESYSTEM*/
|
||
|
|
|