libburnia/libisofs
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Added capability to merge directories of cloned tree with existing

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target tree.
This commit is contained in:
Thomas Schmitt
2011-02-12 13:52:17 +01:00
parent 38483d894e
commit ab0a981814
4 changed files with 49 additions and 18 deletions
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48
libisofs/tree.c
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@ -1015,6 +1015,9 @@ int iso_tree_copy_node_attr(IsoNode *old_node, IsoNode *new_node, int flag)
return ISO_SUCCESS;
}
/*
@param flag bit0= merge directory with *new_node
*/
static
int iso_tree_clone_dir(IsoDir *old_dir,
IsoDir *new_parent, char *new_name, IsoNode **new_node,
@ -1025,12 +1028,15 @@ int iso_tree_clone_dir(IsoDir *old_dir,
IsoDirIter *iter = NULL;
int ret;
*new_node = NULL;
ret = iso_tree_add_new_dir(new_parent, new_name, &new_dir);
if (ret < 0)
return ret;
/* Avoid early grafting of directory to allow cloning of old_dir to a
if (flag & 1) {
new_dir = (IsoDir *) *new_node;
} else {
*new_node = NULL;
ret = iso_tree_add_new_dir(new_parent, new_name, &new_dir);
if (ret < 0)
return ret;
}
/* Avoid traversal of target directory to allow cloning of old_dir to a
subordinate of old_dir.
*/
iso_node_take((IsoNode *) new_dir);
@ -1043,24 +1049,30 @@ int iso_tree_clone_dir(IsoDir *old_dir,
if (ret == 0)
break;
ret = iso_tree_clone(sub_node, new_dir, sub_node->name, &new_sub_node,
0);
flag & 1);
if (ret < 0)
goto ex;
}
/* Now really graft in the new tree */
/* Now graft in the new tree resp. graft back the merged tree */
ret = iso_dir_add_node(new_parent, (IsoNode *) new_dir, 0);
if (ret < 0)
goto ex;
*new_node = (IsoNode *) new_dir;
if (!(flag & 1))
*new_node = (IsoNode *) new_dir;
ret = ISO_SUCCESS;
ex:;
if (iter != NULL)
iso_dir_iter_free(iter);
if (ret < 0 && new_dir != NULL) {
iso_node_remove_tree((IsoNode *) new_dir, NULL);
*new_node = NULL;
if (flag & 1) {
/* graft back the merged tree (eventually with half copy) */
iso_dir_add_node(new_parent, (IsoNode *) new_dir, 0);
} else {
iso_node_remove_tree((IsoNode *) new_dir, NULL);
*new_node = NULL;
}
}
return ret;
}
@ -1141,12 +1153,18 @@ int iso_tree_clone(IsoNode *node,
{
int ret = ISO_SUCCESS;
if (iso_dir_get_node(new_parent, new_name, NULL) == 1)
return ISO_NODE_NAME_NOT_UNIQUE;
if (iso_dir_get_node(new_parent, new_name, new_node) == 1) {
if (! (node->type == LIBISO_DIR && (*new_node)->type == LIBISO_DIR &&
(flag & 1))) {
*new_node = NULL;
return ISO_NODE_NAME_NOT_UNIQUE;
}
} else
flag &= ~1;
if (node->type == LIBISO_DIR) {
ret = iso_tree_clone_dir((IsoDir *) node, new_parent, new_name,
new_node, 0);
new_node, flag & 1);
} else if (node->type == LIBISO_FILE) {
ret = iso_tree_clone_file((IsoFile *) node, new_parent, new_name,
new_node, 0);
@ -1161,6 +1179,8 @@ int iso_tree_clone(IsoNode *node,
}
if (ret < 0)
return ret;
if (flag & 1)
return 2; /* merged two directories, *new_node is not new */
ret = iso_tree_copy_node_attr(node, *new_node, 0);
return ret;
}