zakero::messagepack::Ext Struct Reference

Extension Data. More...

Public Attributes
std::vector< uint8_t >	data
	Extension binary data.
int8_t	type
	A unique identifier for the extension.

Detailed Description

The MessagePack specification defines a structure to hold new data-types and this structure implements that feature. To add a new data-type, set the Ext::type to a positive value and then fill the Ext::data with the information to be stored.

Note

Negative Ext::type value are reserved for use by the MessagePack specification.

As an example, to add a GIF data-type, define the type value then fill the Ext::data with the GIF.

Example

#define TYPE_GIF    2
#define INDEX_NAME  0
#define INDEX_FILE  1
#define INDEX_IMAGE 2
 
zakero::messagepack::Array array = {};
array.append({std::string_view("Super-Sonic Scooter")});
array.append({std::string_view("super_sonic_scooter.gif")});
 
zakero::messagepack::Ext gif = {};
gif.type = TYPE_GIF;
gif.data = loadGif("super_sonic_scooter.gif");
array.append(gif);
 
auto data = zakero::messagepack::serialize(array);
 
// ...somewhere later...
 
zakero::messagepack::Object object = zakero::messagepack::deserialize(data);
zakero::messagepack::Array image = object.asArray();
 
std::string image_name = image.object(INDEX_NAME).asString();
std::string image_file = image.object(INDEX_FILE).asString();
 
zakero::messagepack::Ext raw_data = image.object(INDEX_IMAGE).asExt();
Image image;
if(raw_data.type == TYPE_GIF)
{
        image = parseGif(raw_data.data);
}

Member Data Documentation

data

zakero::messagepack::Ext::data

type

zakero::messagepack::Ext::type

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The documentation for this struct was generated from the following file:

• Zakero_MessagePack.h