[Freeciv-Dev] [PATCH] Attribute block management

[Raimar Falke <hawk@xxxxxxxxxxxxxxxxxxxxxxx>]

The attached patch implements the network and server part of the
proposed attribute design. Each player in the client and server can
have an attribute block (void * and length) attached. Such an
attribute block has no hard limit. In the patch however the size is
limited to 64k.

Since packets can have arbitrary length up to a maximum of 4k the
attribute block have to be split into parts (called attribute chunks)
for the transfer. The splitting and assembling is done by high level
methods (send_attribute_block() and generic_handle_attribute_chunk())
so there is no need to touch such a chunk.

The client can send a request for its attribute block. The server
responds with a set (can also be empty) of attribute chunks. They will
get assembled at the client in its player struct.

The client may send its attribute block for example each turn.

The server saves the block of each player it the savegame.

The patch works but currently there is no user. Code is missing which
maps relations like (object-type, object-id, subkey) -> (value) into a
bytestream (the attribute block) and back.

        Raimar

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 email: rf13@xxxxxxxxxxxxxxxxx
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attribute_block.diff
Description: Text document