About the conversion of plist and Objective-C object

[AiXanadu]

In the instrument service, the Selector and Auxiliaries used for communication are Object-C objects, and the structure includes $top, $objects and $archiver
Can we add a packing and unpacking operation?

An example of a string is as follows:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
	<string>example</string>
</plist>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
	<key>$archiver</key>
	<string>NSKeyedArchiver</string>
	<key>$objects</key>
	<array>
		<string>$null</string>
		<string>example</string>
	</array>
	<key>$top</key>
	<dict>
		<key>root</key>
		<uid>1</uid>
	</dict>
	<key>$version</key>
	<integer>100000</integer>
</plist>

An example of an empty array is as follows

	auto		vObject = plist_new_array();
	if(vObject)
	{
		plist_array_append_item(vObject, plist_new_string("$null"));			// 0

		auto		vNode1 = plist_new_dict();					// 1
		if(vNode1)
		{
			// <key>$class</key>
			plist_dict_set_item(vNode1, "$class", plist_new_uid(2));

			// <key>NS.objects</key>
			auto		vNS_Objects = plist_new_array();
			if(vNS_Objects)
			{
				plist_dict_set_item(vNode1, "NS.objects", vNS_Objects);
			}
			plist_array_append_item(vObject, vNode1);
		}

		auto		vNode2 = plist_new_dict();					// 2
		if(vNode2)
		{
			// <key>$classes</key>
			auto		vNS_Classes = plist_new_array();
			if(vNS_Classes)
			{
				plist_array_append_item(vNS_Classes, plist_new_string("NSArray"));
				plist_array_append_item(vNS_Classes, plist_new_string("NSObject"));

				plist_dict_set_item(vNode2, "$classes", vNS_Classes);
			}
			// <key>$classname</key>
			plist_dict_set_item(vNode2, "$classname", plist_new_string("NSArray"));

			plist_array_append_item(vObject, vNode2);
		}
	}

An example of an empty object is as follows

auto		vObject = plist_new_array();
	if(vObject)
	{
		plist_array_append_item(vObject, plist_new_string("$null"));			// 0

		auto		vNode1 = plist_new_dict();					// 1
		if(vNode1)
		{
			// <key>$class</key>
			plist_dict_set_item(vNode1, "$class", plist_new_uid(2));

			// <key>NS.keys</key>
			auto		vNS_Keys = plist_new_array();
			if(vNS_Keys)
			{
				plist_dict_set_item(vNode1, "NS.keys", vNS_Keys);
			}

			// <key>NS.objects</key>
			auto		vNS_Objects = plist_new_array();
			if(vNS_Objects)
			{
				plist_dict_set_item(vNode1, "NS.objects", vNS_Objects);
			}
			plist_array_append_item(vObject, vNode1);
		}

		auto		vNode2 = plist_new_dict();					// 2
		if(vNode2)
		{
			// <key>$classes</key>
			auto		vNS_Classes = plist_new_array();
			if(vNS_Classes)
			{
				plist_array_append_item(vNS_Classes, plist_new_string("NSDictionary"));
				plist_array_append_item(vNS_Classes, plist_new_string("NSObject"));

				plist_dict_set_item(vNode2, "$classes", vNS_Classes);
			}
			// <key>$classname</key>
			plist_dict_set_item(vNode2, "$classname", plist_new_string("NSDictionary"));

			plist_array_append_item(vObject, vNode2);
		}
	}

[AiXanadu]

Comes with some other samples:

<This is setting 1> >> 1
<This is setting 2> >> 2

	auto		vObject = plist_new_array();
	if(vObject)
	{
		plist_array_append_item(vObject, plist_new_string("$null"));			// 0

		auto		vNode1 = plist_new_dict();					// 1
		if(vNode1)
		{
			// <key>$class</key>
			plist_dict_set_item(vNode1, "$class", plist_new_uid(6));

			// <key>NS.keys</key>
			auto		vNS_Keys = plist_new_array();
			if(vNS_Keys)
			{
				plist_array_append_item(vNS_Keys, plist_new_uid(2));
				plist_array_append_item(vNS_Keys, plist_new_uid(3));
				plist_dict_set_item(vNode1, "NS.keys", vNS_Keys);
			}

			// <key>NS.objects</key>
			auto		vNS_Objects = plist_new_array();
			if(vNS_Objects)
			{
				plist_array_append_item(vNS_Objects, plist_new_uid(4));
				plist_array_append_item(vNS_Objects, plist_new_uid(5));
				plist_dict_set_item(vNode1, "NS.objects", vNS_Objects);
			}
			plist_array_append_item(vObject, vNode1);
		}

		plist_array_append_item(vObject, plist_new_string("This is setting 1"));	// 2
		plist_array_append_item(vObject, plist_new_string("This is setting 2"));	// 3
		plist_array_append_item(vObject, plist_new_int(1));				// 4
		plist_array_append_item(vObject, plist_new_int(2));				// 5

		auto		vNode2 = plist_new_dict();					// 6
		if(vNode2)
		{
			// <key>$classes</key>
			auto		vNS_Classes = plist_new_array();
			if(vNS_Classes)
			{
				plist_array_append_item(vNS_Classes, plist_new_string("NSDictionary"));
				plist_array_append_item(vNS_Classes, plist_new_string("NSObject"));

				plist_dict_set_item(vNode2, "$classes", vNS_Classes);
			}
			// <key>$classname</key>
			plist_dict_set_item(vNode2, "$classname", plist_new_string("NSDictionary"));

			plist_array_append_item(vObject, vNode2);
		}
	}

[AiXanadu]

These transfers belong to DTXMessage dependencies, which can provide preparations for us to add the instrument interface in the future.

These transfers belong to DTXMessage dependencies, which can provide preparations for us to add the instrument interface in the future.

See the format: https://github.com/troybowman/dtxmsg
and:
https://recon.cx/2018/montreal/schedule/system/event_attachments/attachments/000/000/043/original/RECON-MTL-2018-Discovering_the_iOS_Instruments_Server.pdf

[AiXanadu]

like this

static plist_err_t plist_node_from_objc(plist_t objc, plist_t *plist)
{
	return PLIST_ERR_UNKNOWN;
}

static plist_err_t plist_node_to_objc(plist_t node, plist_t *objc)
{
	plist_t		objc_array = plist_new_array();
	if(NULL == objc_array)
	{
		return PLIST_ERR_NO_MEM;
	}
	plist_type	type = plist_get_node_type(node);
	plist_array_append_item(objc_array, plist_new_string("$null"));
	if (type == PLIST_ARRAY)
	{
		uint32_t	vSize = plist_array_get_size(objc_array);

		// Add child information
		plist_t		node_desc_i = plist_new_dict();				// 1
		if(node_desc_i)
		{
			// <key>$class</key>
			plist_dict_set_item(node_desc_i, "$class", plist_new_uid(2));

			// <key>NS.objects</key>
			plist_t		vNS_Objects = plist_new_array();
			if(vNS_Objects)
			{
				for(uint32_t vIndex = 0; vIndex < vSize; ++vIndex)
				{
					plist_array_append_item(vNS_Objects, plist_new_uid(vIndex + 2));
				}
				plist_dict_set_item(node_desc_i, "NS.objects", vNS_Objects);
			}
			plist_array_append_item(objc_array, node_desc_i);
		}

		// Add object information
		plist_t		node_desc_o = plist_new_dict();				// 2
		if(vNode2)
		{
			// <key>$classes</key>
			plist_t		vNS_Classes = plist_new_array();
			if(vNS_Classes)
			{
				plist_array_append_item(vNS_Classes, plist_new_string("NSArray"));
				plist_array_append_item(vNS_Classes, plist_new_string("NSObject"));

				plist_dict_set_item(node_desc_o, "$classes", vNS_Classes);
			}
			// <key>$classname</key>
			plist_dict_set_item(node_desc_o, "$classname", plist_new_string("NSArray"));

			plist_array_append_item(objc_array, node_desc_o);
		}

		// Add child information
		for(uint32_t vIndex = 0; vIndex < vSize; ++vIndex)
		{
			plist_t		child_node = plist_array_get_item(objc_array, vIndex);
			plist_type	child_type = plist_get_node_type(child_node);
			if(child_type == PLIST_ARRAY || child_type == PLIST_DICT)
			{
				plist_t		node_objc = NULL;
				plist_node_to_objc(child_node, &node_objc);
				plist_array_append_item(objc_array, node_objc);
			}
			else
			{
				plist_array_append_item(objc_array, plist_copy(child_node));
			}
		}
	}
	else if (type == PLIST_DICT)
	{
	}
	else
	{
		plist_array_append_item(objc_array, plist_copy(node));

		*objc = objc_array;
		return PLIST_ERR_SUCCESS;
	}
	plist_free(objc_array);
	return PLIST_ERR_UNKNOWN;
}

plist_err_t plist_from_objc(plist_t objc, plist_t *plist)
{
	return PLIST_ERR_UNKNOWN;
}

plist_err_t plist_to_objc(plist_t plist, plist_t *objc)
{
	if(NULL == plist || NULL == objc)
	{
		return PLIST_ERR_INVALID_ARG;
	}

	plist_err_t	err = plist_node_to_objc(plist, objc);
	if(PLIST_ERR_SUCCESS == err)
	{
		plist_t		root = plist_new_dict();
		if(NULL == root)
		{
			plist_free(*objc);
			*objc = NULL;
			return PLIST_ERR_NO_MEM;
		}
		plist_dict_set_item(root, "$archiver", plist_new_string("NSKeyedArchiver"));
		plist_dict_set_item(root, "$objects", *objc);
		auto		top = plist_new_dict();
		if(NULL == top)
		{
			plist_free(root);
			plist_free(*objc);
			*objc = NULL;
			return PLIST_ERR_NO_MEM;
		}
		plist_dict_set_item(top, "root", plist_new_uid(1));
		plist_dict_set_item(root, "$top", top);

		plist_dict_set_item(root, "$version", plist_new_uint(100000));

		*objc = root;
	}
	return err;
}