/**
Changes the directory to the given path
@param fat_fs FS_Instance to find all the information from
@param current_directory The location of the current directory
@param path The name of the directory we want to change into
@return Location of the new directory we are in
**/
FS_CurrentDir change_dir(FS_Instance *fat_fs, FS_CurrentDir current_directory, char *path){
char *tokens = strtok(path, "/\\");
uint32_t directory = current_directory;
while(NULL != tokens) {
current_directory = directory;
FS_EntryList *list = get_entries(fat_fs, (uint32_t)directory);
uint8_t found = 0;
while(NULL != list) {
FS_Entry *entry = list->node;
if((current_directory == directory) && (check_mask(entry->entry->DIR_Attr, ATTR_DIRECTORY))) {
char *file_name = get_file_name(entry->entry);
if(strcmp(tokens, file_name) == 0) {
found = 1;
directory = (entry->entry->DIR_FstClusHI << 8) + entry->entry->DIR_FstClusLO;
}
free(file_name);
}
FS_EntryList *curr = list;
list = list->next;
entry_list_cleanup(curr);
}
if(!found) {
printf("Couldn't find directory.\n");
directory = current_directory;
break;
}
tokens = strtok(NULL, "/\\");
}
return directory;
}
ssize_t um_consume_one_message(um_parser_t* um_parser,
const uint8_t* buf, size_t nbuf,
uint64_t* reqid_out,
mc_msg_t** msg_out) {
FBI_ASSERT(um_parser && buf && nbuf > 0 && reqid_out && msg_out);
*msg_out = NULL;
ssize_t consumed = entry_list_preparer_read(&um_parser->prep,
(const char*)buf,
nbuf);
if (consumed <= 0) {
goto error;
}
/* Because the rank of the unsigned integer is equal to the rank of the
* signed integer, the signed integer is converted to the type of the
* unsigned integer, and this assertion triggers on error. To get around
* this, we do the cast ourselves.
*/
FBI_ASSERT(consumed <= (ssize_t)nbuf);
if (entry_list_preparer_finished(&um_parser->prep)) {
entry_list_t elist;
if (entry_list_consume_preparer(&elist, &um_parser->prep) < 0) {
goto error;
}
mc_msg_t base;
mc_msg_init_not_refcounted(&base);
_parse_info_t parse_info;
if (_fill_base_msg(&elist, &base, &parse_info) != 0) {
goto error;
}
*reqid_out = parse_info.reqid;
*msg_out = _msg_create(&base, &elist, &parse_info);
if (*msg_out == NULL) {
dbg_error("msg_create failed");
goto error;
}
FBI_ASSERT((*msg_out)->op != mc_op_end);
entry_list_cleanup(&elist);
} else {
FBI_ASSERT(consumed == nbuf);
}
return consumed;
error:
entry_list_preparer_reset_after_failure(&um_parser->prep);
// Function that return an error must have not left any messages around
FBI_ASSERT(*msg_out == NULL);
return -1;
}
void um_backing_msg_cleanup(um_backing_msg_t* bmsg) {
entry_list_cleanup(&bmsg->elist);
bmsg->elist.entries = bmsg->entries_array;
bmsg->elist.entries_size = BMSG_ENTRIES_ARRAY_SIZE;
if (bmsg->msg != NULL) {
mc_msg_decref(bmsg->msg);
bmsg->msg = NULL;
}
bmsg->inuse = 0;
}