Mercurial > pub > dyncall > bindings
comparison lua/luadyncall/src/dynstruct.lua @ 0:0cfcc391201f
initial from svn dyncall-1745
| author | Daniel Adler |
|---|---|
| date | Thu, 19 Mar 2015 22:26:28 +0100 |
| parents | |
| children |
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| -1:000000000000 | 0:0cfcc391201f |
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| 1 require "ldynstruct" | |
| 2 require "dyntype" | |
| 3 | |
| 4 dynstruct_metatable = { | |
| 5 __index = function(s, f) | |
| 6 local typeinfo = rawget(s, "typeinfo") | |
| 7 local fieldinfo = typeinfo.fields[f] | |
| 8 if not fieldinfo then error("unknown field "..f.." for type "..typeinfo.name) end | |
| 9 return ldynstruct.dynpeek( rawget(s, "pointer"), fieldinfo.offset, fieldinfo.typeinfo.signature ) | |
| 10 end, | |
| 11 __newindex = function(s, f, v) | |
| 12 local typeinfo = rawget(s, "typeinfo") | |
| 13 local fieldinfo = typeinfo.fields[f] | |
| 14 if not fieldinfo then error("unknown field "..f.." for type "..typeinfo.name) end | |
| 15 ldynstruct.dynpoke( rawget(s, "pointer"), fieldinfo.offset, fieldinfo.typeinfo.signature, v ) | |
| 16 end | |
| 17 } | |
| 18 | |
| 19 function newdynstruct(typename) | |
| 20 local typeinfo = gettypeinfo(typename) | |
| 21 local object = { pointer = ldynstruct.newstruct( typeinfo.size ), typeinfo = typeinfo } | |
| 22 setmetatable(object, dynstruct_metatable) | |
| 23 return object | |
| 24 end | |
| 25 | |
| 26 function dyncast(object, typeinfo) | |
| 27 local pointer | |
| 28 if type(object) == "userdata" then | |
| 29 pointer = object | |
| 30 elseif type(object) == "table" then | |
| 31 pointer = rawgeti(object, "pointer") | |
| 32 end | |
| 33 local object = { pointer = pointer, typeinfo = gettypeinfo(typeinfo) } | |
| 34 setmetatable(object, dynstruct_metatable) | |
| 35 return object | |
| 36 end | |
| 37 |