57 lv_fs_res_t lv_fs_open(lv_fs_file_t * file_p, const char * path, lv_fs_mode_t mode)  in lv_fs_open()  argument
91     file_p->drv = drv;  in lv_fs_open()
92     file_p->file_d = file_d;  in lv_fs_open()
95         file_p->cache = lv_mem_alloc(sizeof(lv_fs_file_cache_t));  in lv_fs_open()
96         LV_ASSERT_MALLOC(file_p->cache);  in lv_fs_open()
97         lv_memset_00(file_p->cache, sizeof(lv_fs_file_cache_t));  in lv_fs_open()
98         file_p->cache->start = UINT32_MAX;  /*Set an invalid range by default*/  in lv_fs_open()
99         file_p->cache->end = UINT32_MAX - 1;  in lv_fs_open()
105 lv_fs_res_t lv_fs_close(lv_fs_file_t * file_p)  in lv_fs_close()  argument
107     if(file_p->drv == NULL) {  in lv_fs_close()
111     if(file_p->drv->close_cb == NULL) {  in lv_fs_close()
115     lv_fs_res_t res = file_p->drv->close_cb(file_p->drv, file_p->file_d);  in lv_fs_close()
117     if(file_p->drv->cache_size && file_p->cache) {  in lv_fs_close()
118         if(file_p->cache->buffer) {  in lv_fs_close()
119             lv_mem_free(file_p->cache->buffer);  in lv_fs_close()
122         lv_mem_free(file_p->cache);  in lv_fs_close()
125     file_p->file_d = NULL;  in lv_fs_close()
126     file_p->drv    = NULL;  in lv_fs_close()
127     file_p->cache  = NULL;  in lv_fs_close()
132 static lv_fs_res_t lv_fs_read_cached(lv_fs_file_t * file_p, char * buf, uint32_t btr, uint32_t * br)  in lv_fs_read_cached()  argument
135     uint32_t file_position = file_p->cache->file_position;  in lv_fs_read_cached()
136     uint32_t start = file_p->cache->start;  in lv_fs_read_cached()
137     uint32_t end = file_p->cache->end;  in lv_fs_read_cached()
138     char * buffer = file_p->cache->buffer;  in lv_fs_read_cached()
139     uint16_t buffer_size = file_p->drv->cache_size;  in lv_fs_read_cached()
158 …   res = file_p->drv->read_cb(file_p->drv, file_p->file_d, (void *)(buf + buffer_remaining_length),  in lv_fs_read_cached()
163 …res = file_p->drv->read_cb(file_p->drv, file_p->file_d, (void *)buffer, buffer_size, &bytes_read_t…  in lv_fs_read_cached()
164                 file_p->cache->start = file_p->cache->end;  in lv_fs_read_cached()
165                 file_p->cache->end = file_p->cache->start + bytes_read_to_buffer;  in lv_fs_read_cached()
177             res = file_p->drv->read_cb(file_p->drv, file_p->file_d, (void *)buf, btr, br);  in lv_fs_read_cached()
182                 file_p->cache->buffer = lv_mem_alloc(buffer_size);  in lv_fs_read_cached()
183                 LV_ASSERT_MALLOC(file_p->cache->buffer);  in lv_fs_read_cached()
184                 buffer = file_p->cache->buffer;  in lv_fs_read_cached()
188 …res = file_p->drv->read_cb(file_p->drv, file_p->file_d, (void *)buffer, buffer_size, &bytes_read_t…  in lv_fs_read_cached()
189             file_p->cache->start = file_position;  in lv_fs_read_cached()
190             file_p->cache->end = file_p->cache->start + bytes_read_to_buffer;  in lv_fs_read_cached()
199         file_p->cache->file_position += *br;  in lv_fs_read_cached()
205 lv_fs_res_t lv_fs_read(lv_fs_file_t * file_p, void * buf, uint32_t btr, uint32_t * br)  in lv_fs_read()  argument
208     if(file_p->drv == NULL) return LV_FS_RES_INV_PARAM;  in lv_fs_read()
209     if(file_p->drv->read_cb == NULL) return LV_FS_RES_NOT_IMP;  in lv_fs_read()
214     if(file_p->drv->cache_size) {  in lv_fs_read()
215         res = lv_fs_read_cached(file_p, (char *)buf, btr, &br_tmp);  in lv_fs_read()
218         res = file_p->drv->read_cb(file_p->drv, file_p->file_d, buf, btr, &br_tmp);  in lv_fs_read()
226 lv_fs_res_t lv_fs_write(lv_fs_file_t * file_p, const void * buf, uint32_t btw, uint32_t * bw)  in lv_fs_write()  argument
230     if(file_p->drv == NULL) {  in lv_fs_write()
234     if(file_p->drv->write_cb == NULL) {  in lv_fs_write()
239     lv_fs_res_t res = file_p->drv->write_cb(file_p->drv, file_p->file_d, buf, btw, &bw_tmp);  in lv_fs_write()
245 lv_fs_res_t lv_fs_seek(lv_fs_file_t * file_p, uint32_t pos, lv_fs_whence_t whence)  in lv_fs_seek()  argument
247     if(file_p->drv == NULL) {  in lv_fs_seek()
251     if(file_p->drv->seek_cb == NULL) {  in lv_fs_seek()
256     if(file_p->drv->cache_size) {  in lv_fs_seek()
259                     file_p->cache->file_position = pos;  in lv_fs_seek()
262 …if(file_p->cache->file_position < file_p->cache->start || file_p->cache->file_position > file_p->c…  in lv_fs_seek()
263 …res = file_p->drv->seek_cb(file_p->drv, file_p->file_d, file_p->cache->file_position, LV_FS_SEEK_S…  in lv_fs_seek()
269                     file_p->cache->file_position += pos;  in lv_fs_seek()
272 …if(file_p->cache->file_position < file_p->cache->start || file_p->cache->file_position > file_p->c…  in lv_fs_seek()
273 …res = file_p->drv->seek_cb(file_p->drv, file_p->file_d, file_p->cache->file_position, LV_FS_SEEK_S…  in lv_fs_seek()
280                     res = file_p->drv->seek_cb(file_p->drv, file_p->file_d, pos, whence);  in lv_fs_seek()
283                         res = file_p->drv->tell_cb(file_p->drv, file_p->file_d, &tmp_position);  in lv_fs_seek()
286                             file_p->cache->file_position = tmp_position;  in lv_fs_seek()
294         res = file_p->drv->seek_cb(file_p->drv, file_p->file_d, pos, whence);  in lv_fs_seek()
300 lv_fs_res_t lv_fs_tell(lv_fs_file_t * file_p, uint32_t * pos)  in lv_fs_tell()  argument
302     if(file_p->drv == NULL) {  in lv_fs_tell()
307     if(file_p->drv->tell_cb == NULL) {  in lv_fs_tell()
313     if(file_p->drv->cache_size) {  in lv_fs_tell()
314         *pos = file_p->cache->file_position;  in lv_fs_tell()
318         res = file_p->drv->tell_cb(file_p->drv, file_p->file_d, pos);  in lv_fs_tell()