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- /**
- * @file lv_ufs.c
- * Implementation of RAM file system which do NOT support directories.
- * The API is compatible with the lv_fs_int module.
- */
- /*********************
- * INCLUDES
- *********************/
- #include "lv_ufs.h"
- #if USE_LV_FILESYSTEM
- #include "lv_ll.h"
- #include <string.h>
- #include <stdio.h>
- #include <errno.h>
- /*********************
- * DEFINES
- *********************/
- /**********************
- * TYPEDEFS
- **********************/
- /**********************
- * STATIC PROTOTYPES
- **********************/
- static lv_ufs_ent_t* lv_ufs_ent_get(const char * fn);
- static lv_ufs_ent_t* lv_ufs_ent_new(const char * fn);
- /**********************
- * STATIC VARIABLES
- **********************/
- static lv_ll_t file_ll;
- static bool inited = false;
-
- /**********************
- * MACROS
- **********************/
- /**********************
- * GLOBAL FUNCTIONS
- **********************/
- /**
- * Create a driver for ufs and initialize it.
- */
- void lv_ufs_init(void)
- {
- lv_ll_init(&file_ll, sizeof(lv_ufs_ent_t));
- lv_fs_drv_t ufs_drv;
- memset(&ufs_drv, 0, sizeof(lv_fs_drv_t)); /*Initialization*/
-
- ufs_drv.file_size = sizeof(lv_ufs_file_t);
- ufs_drv.rddir_size = sizeof(lv_ufs_dir_t);
- ufs_drv.letter = UFS_LETTER;
- ufs_drv.ready = lv_ufs_ready;
-
- ufs_drv.open = lv_ufs_open;
- ufs_drv.close = lv_ufs_close;
- ufs_drv.remove = lv_ufs_remove;
- ufs_drv.read = lv_ufs_read;
- ufs_drv.write = lv_ufs_write;
- ufs_drv.seek = lv_ufs_seek;
- ufs_drv.tell = lv_ufs_tell;
- ufs_drv.size = lv_ufs_size;
- ufs_drv.trunc = lv_ufs_trunc;
- ufs_drv.free = lv_ufs_free;
-
- ufs_drv.dir_open = lv_ufs_dir_open;
- ufs_drv.dir_read = lv_ufs_dir_read;
- ufs_drv.dir_close = lv_ufs_dir_close;
-
- lv_fs_add_drv(&ufs_drv);
-
- inited = true;
- }
- /**
- * Give the state of the ufs
- * @return true if ufs is initialized and can be used else false
- */
- bool lv_ufs_ready(void)
- {
- return inited;
- }
- /**
- * Open a file in ufs
- * @param file_p pointer to a lv_ufs_file_t variable
- * @param fn name of the file. There are no directories so e.g. "myfile.txt"
- * @param mode element of 'fs_mode_t' enum or its 'OR' connection (e.g. FS_MODE_WR | FS_MODE_RD)
- * @return LV_FS_RES_OK: no error, the file is opened
- * any error from lv__fs_res_t enum
- */
- lv_fs_res_t lv_ufs_open (void * file_p, const char * fn, lv_fs_mode_t mode)
- {
- lv_ufs_file_t * fp = file_p; /*Convert type*/
- lv_ufs_ent_t* ent = lv_ufs_ent_get(fn);
-
- fp->ent = NULL;
-
- /*If the file not exists ...*/
- if( ent == NULL) {
- if((mode & LV_FS_MODE_WR) != 0) { /*Create the file if opened for write*/
- ent = lv_ufs_ent_new(fn);
- if(ent == NULL) return LV_FS_RES_FULL; /*No space for the new file*/
- } else {
- return LV_FS_RES_NOT_EX; /*Can not read not existing file*/
- }
- }
-
- /*Can not write already opened and const data files*/
- if((mode & LV_FS_MODE_WR) != 0) {
- if(ent->oc != 0) return LV_FS_RES_LOCKED;
- if(ent->const_data != 0) return LV_FS_RES_DENIED;
- }
-
- /*No error, the file can be opened*/
- fp->ent = ent;
- fp->ar = mode & LV_FS_MODE_RD ? 1 : 0;
- fp->aw = mode & LV_FS_MODE_WR ? 1 : 0;
- fp->rwp = 0;
- ent->oc ++;
-
- return LV_FS_RES_OK;
- }
- /**
- * Create a file with a constant data
- * @param fn name of the file (directories are not supported)
- * @param const_p pointer to a constant data
- * @param len length of the data pointed by 'const_p' in bytes
- * @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_create_const(const char * fn, const void * const_p, uint32_t len)
- {
- lv_ufs_file_t file;
- lv_fs_res_t res;
-
- /*Error if the file already exists*/
- res = lv_ufs_open(&file, fn, LV_FS_MODE_RD);
- if(res == LV_FS_RES_OK) {
- lv_ufs_close(&file);
- return LV_FS_RES_DENIED;
- }
-
- lv_ufs_close(&file);
-
- res = lv_ufs_open(&file, fn, LV_FS_MODE_WR);
- if(res != LV_FS_RES_OK) return res;
-
- lv_ufs_ent_t* ent = file.ent;
-
- if(ent->data_d != NULL) return LV_FS_RES_DENIED;
-
- ent->data_d = (void *) const_p;
- ent->size = len;
- ent->const_data = 1;
-
- res = lv_ufs_close(&file);
- if(res != LV_FS_RES_OK) return res;
-
- return LV_FS_RES_OK;
- }
- /**
- * Close an opened file
- * @param file_p pointer to an 'ufs_file_t' variable. (opened with lv_ufs_open)
- * @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_close (void * file_p)
- {
- lv_ufs_file_t * fp = file_p; /*Convert type*/
-
- if(fp->ent == NULL) return LV_FS_RES_OK;
-
- /*Decrement the Open counter*/
- if(fp->ent->oc > 0) {
- fp->ent->oc--;
- }
-
- return LV_FS_RES_OK;
- }
- /**
- * Remove a file. The file can not be opened.
- * @param fn '\0' terminated string
- * @return LV_FS_RES_OK: no error, the file is removed
- * LV_FS_RES_DENIED: the file was opened, remove failed
- */
- lv_fs_res_t lv_ufs_remove(const char * fn)
- {
- lv_ufs_ent_t* ent = lv_ufs_ent_get(fn);
- if(ent == NULL) return LV_FS_RES_DENIED; /*File not exists*/
-
- /*Can not be deleted is opened*/
- if(ent->oc != 0) return LV_FS_RES_DENIED;
- lv_ll_rem(&file_ll, ent);
- lv_mem_free(ent->fn_d);
- ent->fn_d = NULL;
- if(ent->const_data == 0){
- lv_mem_free(ent->data_d);
- ent->data_d = NULL;
- }
-
- lv_mem_free(ent);
-
- return LV_FS_RES_OK;
- }
- /**
- * Read data from an opened file
- * @param file_p pointer to an 'ufs_file_t' variable. (opened with lv_ufs_open )
- * @param buf pointer to a memory block where to store the read data
- * @param btr number of Bytes To Read
- * @param br the real number of read bytes (Byte Read)
- * @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_read (void * file_p, void * buf, uint32_t btr, uint32_t * br)
- {
- lv_ufs_file_t * fp = file_p; /*Convert type*/
-
- lv_ufs_ent_t* ent = fp->ent;
- *br = 0;
-
- if(ent->data_d == NULL || ent->size == 0) { /*Don't read empty files*/
- return LV_FS_RES_OK;
- } else if(fp->ar == 0) { /*The file is not opened for read*/
- return LV_FS_RES_DENIED;
- }
- /*No error, read the file*/
- if(fp->rwp + btr > ent->size) { /*Check too much bytes read*/
- *br = ent->size - fp->rwp;
- } else {
- *br = btr;
- }
- /*Read the data*/
- uint8_t * data8_p;
- if(ent->const_data == 0) {
- data8_p = (uint8_t*) ent->data_d;
- } else {
- data8_p = ent->data_d;
- }
-
- data8_p += fp->rwp;
- memcpy(buf, data8_p, *br);
- fp->rwp += *br; /*Refresh the read write pointer*/
-
- return LV_FS_RES_OK;
- }
- /**
- * Write data to an opened file
- * @param file_p pointer to an 'ufs_file_t' variable. (opened with lv_ufs_open)
- * @param buf pointer to a memory block which content will be written
- * @param btw the number Bytes To Write
- * @param bw The real number of written bytes (Byte Written)
- * @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_write (void * file_p, const void * buf, uint32_t btw, uint32_t * bw)
- {
- lv_ufs_file_t * fp = file_p; /*Convert type*/
- *bw = 0;
-
- if(fp->aw == 0) return LV_FS_RES_DENIED; /*Not opened for write*/
-
- lv_ufs_ent_t* ent = fp->ent;
-
- /*Reallocate data array if it necessary*/
- uint32_t new_size = fp->rwp + btw;
- if(new_size > ent->size) {
- uint8_t* new_data = lv_mem_realloc(ent->data_d, new_size);
- if(new_data == NULL) return LV_FS_RES_FULL; /*Cannot allocate the new memory*/
-
- ent->data_d = new_data;
- ent->size = new_size;
- }
-
- /*Write the file*/
- uint8_t * data8_p = (uint8_t*) ent->data_d;
- data8_p += fp->rwp;
- memcpy(data8_p, buf, btw);
- *bw = btw;
- fp->rwp += *bw;
-
- return LV_FS_RES_OK;
- }
- /**
- * Set the read write pointer. Also expand the file size if necessary.
- * @param file_p pointer to an 'ufs_file_t' variable. (opened with lv_ufs_open )
- * @param pos the new position of read write pointer
- * @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_seek (void * file_p, uint32_t pos)
- {
- lv_ufs_file_t * fp = file_p; /*Convert type*/
- lv_ufs_ent_t* ent = fp->ent;
- /*Simply move the rwp before EOF*/
- if(pos < ent->size) {
- fp->rwp = pos;
- } else { /*Expand the file size*/
- if(fp->aw == 0) return LV_FS_RES_DENIED; /*Not opened for write*/
-
- uint8_t* new_data = lv_mem_realloc(ent->data_d, pos);
- if(new_data == NULL) return LV_FS_RES_FULL; /*Out of memory*/
-
- ent->data_d = new_data;
- ent->size = pos;
- fp->rwp = pos;
- }
-
- return LV_FS_RES_OK;
- }
- /**
- * Give the position of the read write pointer
- * @param file_p pointer to an 'ufs_file_t' variable. (opened with lv_ufs_open )
- * @param pos_p pointer to to store the result
- * @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_tell (void * file_p, uint32_t * pos_p)
- {
- lv_ufs_file_t * fp = file_p; /*Convert type*/
-
- *pos_p = fp->rwp;
-
- return LV_FS_RES_OK;
- }
- /**
- * Truncate the file size to the current position of the read write pointer
- * @param file_p pointer to an 'ufs_file_t' variable. (opened with lv_ufs_open )
- * @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_trunc (void * file_p)
- {
- 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);
- 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(&file_ll);
- } else {
- ufs_dir_p->last_ent = lv_ll_get_next(&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(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(&file_ll); /*Create a new file*/
- if(new_ent == NULL) {
- return NULL;
- }
-
- new_ent->fn_d = lv_mem_alloc(strlen(fn) + 1); /*Save the name*/
- 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*/
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