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Diego Nehab wrote:
I would suggest two alternatives that don't require changing any C code.
1) using package.preload
Let's say you have packages a, b, c, inside some DLL d. You can do
something like this
-- untested code follows
package.preload.a = rc_loader("a", "d")
package.preload.b = rc_loader("b", "d")
package.preload.b = rc_loader("c", "d")
-- returns a function that when invoked will load the appropriate
-- chunk from the resource and call it
function rc_loader(module, bundle)
return function()
local f = rc_chunk(module, bundle)
f()
end
end
function rc_chunk(module, bundle)
-- somehow obtain the chunk from the resource in the DLL
-- perhaps calling require(bundle) helps find it?
end
you have described by lua prototype almost exactly :)
or for lazy loading:
package.preload.a = function(x) return assert(rcloader("a"))(x) end
2) Alternatively, create a new loader
-- untested code follows
function rc_loader(bundle)
return function(name)
-- somehow obtain the chunk from the resource in the DLL
-- perhaps calling require(bundle) helps find it?
return f
end
end
table.insert(package.loaders, rc_loader("d"))
that is almost exactly how i set up the resource search, to look for "socket.ftp" as a resource in socket.dll.
Thanks - that is very similar to my initial prototype; if i require "socket", it sets up the preloader for "mime", "ltn12", etc.Hope I didn't mess up any details. Regards, Diego.
I'm playing with "package.alias" so i can set up a mapping (eg. via luainit), so that require"ltn12" knows to look in socket.dll, without having to require (and load) socket.
ps no c code need be modified; require"rcloadlib" will insert the new loader etc., it just needs duplicates of several loadlib internal fn's, like findfile() etc.
Adrian