/**
* create a new object and open it if success
*/
URET uffs_CreateObject(uffs_Object *obj, const char *fullname, int oflag)
{
oflag |= UO_CREATE;
if (uffs_ParseObject(obj, fullname) == U_SUCC)
uffs_CreateObjectEx(obj, obj->dev, obj->parent, obj->name, obj->name_len, oflag);
return (obj->err == UENOERR ? U_SUCC : U_FAIL);
}
/**
* create a new object and open it if success
*/
URET uffs_CreateObject(uffs_Object *obj, const char *fullname, int oflag)
{
URET ret = U_FAIL;
oflag |= UO_CREATE;
if (uffs_ParseObject(obj, fullname) == U_SUCC)
uffs_CreateObjectEx(obj, obj->dev, obj->parent,
obj->name, obj->name_len, oflag);
if (obj->err == UENOERR) {
ret = U_SUCC;
}
else {
if (obj->dev) {
uffs_PutDevice(obj->dev);
obj->dev = NULL;
}
ret = U_FAIL;
}
return ret;
}
/**
* Open object under the given dir.
*
* \param[in|out] obj to be open, obj is returned from uffs_GetObject()
* \param[in] dev uffs device
* \param[in] dir object parent dir serial NO.
* \param[in] name point to the object name
* \param[in] name_len object name length
* \param[in] oflag open flag. UO_DIR should be passed for an dir object.
*
* \return U_SUCC or U_FAIL (error code in obj->err).
*/
URET uffs_OpenObjectEx(uffs_Object *obj, uffs_Device *dev,
int dir, const char *name, int name_len, int oflag)
{
obj->err = UENOERR;
obj->open_succ = U_FALSE;
if (dev == NULL) {
obj->err = UEINVAL;
goto ext;
}
if ((oflag & (UO_WRONLY | UO_RDWR)) == (UO_WRONLY | UO_RDWR)) {
/* UO_WRONLY and UO_RDWR can't appear together */
uffs_Perror(UFFS_MSG_NOISY,
"UO_WRONLY and UO_RDWR can't appear together");
obj->err = UEINVAL;
goto ext;
}
obj->oflag = oflag;
obj->parent = dir;
obj->type = (oflag & UO_DIR ? UFFS_TYPE_DIR : UFFS_TYPE_FILE);
obj->pos = 0;
obj->dev = dev;
obj->name = name;
obj->name_len = name_len;
// adjust the name length
if (obj->type == UFFS_TYPE_DIR) {
if (obj->name_len > 0 && name[obj->name_len - 1] == '/')
obj->name_len--; // truncate the ending '/' for dir
}
obj->sum = (obj->name_len > 0 ? uffs_MakeSum16(name, obj->name_len) : 0);
obj->head_pages = obj->dev->attr->pages_per_block - 1;
if (obj->type == UFFS_TYPE_DIR) {
if (obj->name_len == 0) {
if (dir != PARENT_OF_ROOT) {
uffs_Perror(UFFS_MSG_SERIOUS, "Bad parent for root dir!");
obj->err = UEINVAL;
}
else {
obj->serial = ROOT_DIR_SERIAL;
}
goto ext;
}
}
else {
if (obj->name_len == 0 || name[obj->name_len - 1] == '/') {
uffs_Perror(UFFS_MSG_SERIOUS, "Bad file name.");
obj->err = UEINVAL;
}
}
uffs_ObjectDevLock(obj);
if (obj->type == UFFS_TYPE_DIR) {
obj->node = uffs_TreeFindDirNodeByName(obj->dev, obj->name,
obj->name_len, obj->sum,
obj->parent);
}
else {
obj->node = uffs_TreeFindFileNodeByName(obj->dev, obj->name,
obj->name_len, obj->sum,
obj->parent);
}
if (obj->node == NULL) { // dir or file not exist
if (obj->oflag & UO_CREATE) { // expect to create a new one
uffs_ObjectDevUnLock(obj);
if (obj->name == NULL || obj->name_len == 0)
obj->err = UEEXIST;
else
uffs_CreateObjectEx(obj, dev, dir, obj->name, obj->name_len, oflag);
goto ext;
}
else {
obj->err = UENOENT;
goto ext_1;
}
}
if ((obj->oflag & (UO_CREATE | UO_EXCL)) == (UO_CREATE | UO_EXCL)){
obj->err = UEEXIST;
goto ext_1;
}
obj->serial = GET_OBJ_NODE_SERIAL(obj);
obj->open_succ = U_TRUE;
if (obj->oflag & UO_TRUNC)
if (do_TruncateObject(obj, 0, eDRY_RUN) == U_SUCC) {
//NOTE: obj->err will be set in do_TruncateObject() if failed.
do_TruncateObject(obj, 0, eREAL_RUN);
}
ext_1:
uffs_ObjectDevUnLock(obj);
ext:
obj->open_succ = (obj->err == UENOERR ? U_TRUE : U_FALSE);
return (obj->err == UENOERR ? U_SUCC : U_FAIL);
}
