Konstantin 4ab499fe26 Alternative export method of arrays from C to Lua ... The patch is mainly to export client_array_t object to Lua, but can be used to export any ..._array_t object. The idea: export to Lua not a table, but userdata with metamethods to get/set/define length of ..._array_t object directly. Now when I get clients field from tag object C code creates full copy of client_array_t structure into Lua table. It takes traversing a whole array of data. I did it in other way: userdata is exported, with __index, __newindex, and __len meta-methods defined, and Lua script gains direct access to client_array_t C-array: it can get client object, get length of array and assign client objects to some index in C-array. Pros: No overhead of creation a copy of C-structure into Lua-table: if I want just to test a number of clients for a tag, I don't need a whole loop to build table, I just want to read clients->len field, and I do so via __len meta-method. Also if I want to get some client from tags.clients, I don't need to create ALL clients Lua-objects, I just get client_t C-struct and create Lua-object from it. Just in place. So Lua-loop enuming all tag.clients is not 2 loops internally (first create copy of tag.clients into Lua-table, then enum this table), but only one, and if I break out of loop in the middle, I create only some client Lua-objects, not all of them from tag.clients. Contras: As far as clients field is not a table, I cant use pairs/ipairs and other table functions for it. But it can be implemented in other way: for k,c pairs(tag.clients) => for k = 1, #tag.clients, table.insert(tag.clients, client) => tag.clients[#tag.clients+1] = client etc. One more Pro now: As far as tag.clients in current implementation returns copy of data table.insert doesn't do what's expected: it doesn't really add client into tag.clients "array". With my implementation client is added as expected, as we work with client_array_t structure directly. Signed-off-by: Julien Danjou <julien@danjou.info>		2008-08-10 16:18:59 +02:00
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awful.lua.in	Alternative export method of arrays from C to Lua	2008-08-10 16:18:59 +02:00
beautiful.lua	beautiful: fix luadoc module name	2008-08-08 19:07:42 +02:00
tabulous.lua	libs: fix callback call and untab	2008-08-10 08:04:09 +02:00