519 lines
12 KiB
Lua
519 lines
12 KiB
Lua
-- flags
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local disable_virtual_hooks = true
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local enable_pure_virtual = true
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local default_private_access = false
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local access = {public = 0, protected = 1, private = 2}
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function preparse_hook(p)
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if default_private_access then
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-- we need to make all structs 'public' by default
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p.code = string.gsub(p.code, "(struct[^;]*{)", "%1\npublic:\n")
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end
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end
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function parser_hook(s)
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local container = classContainer.curr -- get the current container
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if default_private_access then
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if not container.curr_member_access and container.classtype == 'class' then
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-- default access for classes is private
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container.curr_member_access = access.private
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end
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end
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-- try labels (public, private, etc)
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do
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local b,e,label = string.find(s, "^%s*(%w*)%s*:[^:]") -- we need to check for [^:], otherwise it would match 'namespace::type'
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if b then
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-- found a label, get the new access value from the global 'access' table
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if access[label] then
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container.curr_member_access = access[label]
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end -- else ?
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return strsub(s, e) -- normally we would use 'e+1', but we need to preserve the [^:]
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end
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end
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local ret = nil
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if disable_virtual_hooks then
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return ret
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end
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local b,e,decl,arg = string.find(s, "^%s*virtual%s+([^%({~]+)(%b())")
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local const
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if b then
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local ret = string.sub(s, e+1)
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if string.find(ret, "^%s*const") then
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const = "const"
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ret = string.gsub(ret, "^%s*const", "")
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end
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local purev = false
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if string.find(ret, "^%s*=%s*0") then
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purev = true
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ret = string.gsub(ret, "^%s*=%s*0", "")
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end
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ret = string.gsub(ret, "^%s*%b{}", "")
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local func = Function(decl, arg, const)
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func.pure_virtual = purev
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--func.access = access
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func.original_sig = decl
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local curflags = classContainer.curr.flags
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if not curflags.virtual_class then
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curflags.virtual_class = VirtualClass()
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end
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curflags.virtual_class:add(func)
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curflags.pure_virtual = curflags.pure_virtual or purev
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return ret
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end
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return ret
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end
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-- class VirtualClass
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classVirtualClass = {
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classtype = 'class',
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name = '',
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base = '',
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type = '',
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btype = '',
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ctype = '',
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}
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classVirtualClass.__index = classVirtualClass
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setmetatable(classVirtualClass,classClass)
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function classVirtualClass:add(f)
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local parent = classContainer.curr
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pop()
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table.insert(self.methods, {f=f})
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local name,sig
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-- doble negative means positive
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if f.name == 'new' and ((not self.flags.parent_object.flags.pure_virtual) or (enable_pure_virtual)) then
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name = self.original_name
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elseif f.name == 'delete' then
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name = '~'..self.original_name
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else
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if f.access ~= 2 and (not f.pure_virtual) and f.name ~= 'new' and f.name ~= 'delete' then
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name = f.mod.." "..f.type..f.ptr.." "..self.flags.parent_object.lname.."__"..f.name
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end
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end
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if name then
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sig = name..self:get_arg_list(f, true)..";\n"
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push(self)
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sig = preprocess(sig)
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self:parse(sig)
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pop()
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end
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push(parent)
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end
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function preprocess(sig)
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sig = gsub(sig,"([^%w_])void%s*%*","%1_userdata ") -- substitute 'void*'
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sig = gsub(sig,"([^%w_])void%s*%*","%1_userdata ") -- substitute 'void*'
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sig = gsub(sig,"([^%w_])char%s*%*","%1_cstring ") -- substitute 'char*'
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sig = gsub(sig,"([^%w_])lua_State%s*%*","%1_lstate ") -- substitute 'lua_State*'
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return sig
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end
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function classVirtualClass:get_arg_list(f, decl)
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local ret = ""
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local sep = ""
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local i=1
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while f.args[i] do
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local arg = f.args[i]
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if decl then
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local ptr
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if arg.ret ~= '' then
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ptr = arg.ret
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else
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ptr = arg.ptr
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end
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local def = ""
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if arg.def and arg.def ~= "" then
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def = " = "..arg.def
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end
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ret = ret..sep..arg.mod.." "..arg.type..ptr.." "..arg.name..def
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else
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ret = ret..sep..arg.name
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end
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sep = ","
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i = i+1
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end
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return "("..ret..")"
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end
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function classVirtualClass:add_parent_virtual_methods(parent)
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parent = parent or _global_classes[self.flags.parent_object.btype]
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if not parent then return end
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if parent.flags.virtual_class then
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local vclass = parent.flags.virtual_class
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for k,v in ipairs(vclass.methods) do
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if v.f.name ~= 'new' and v.f.name ~= 'delete' and (not self:has_method(v.f)) then
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table.insert(self.methods, {f=v.f})
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end
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end
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end
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parent = _global_classes[parent.btype]
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if parent then
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self:add_parent_virtual_methods(parent)
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end
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end
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function classVirtualClass:has_method(f)
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for k,v in pairs(self.methods) do
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-- just match name for now
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if v.f.name == f.name then
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return true
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end
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end
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return false
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end
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function classVirtualClass:add_constructors()
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local i=1
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while self.flags.parent_object[i] do
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local v = self.flags.parent_object[i]
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if getmetatable(v) == classFunction and (v.name == 'new' or v.name == 'delete') then
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self:add(v)
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end
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i = i+1
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end
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end
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--[[
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function classVirtualClass:requirecollection(t)
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self:add_constructors()
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local req = classClass.requirecollection(self, t)
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if req then
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output('class ',self.name,";")
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end
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return req
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end
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--]]
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function classVirtualClass:supcode()
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-- pure virtual classes can have no default constructors on gcc 4
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if self.flags.parent_object.flags.pure_virtual and not enable_pure_virtual then
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output('#if (__GNUC__ == 4) || (__GNUC__ > 4 ) // I hope this works on Microsoft Visual studio .net server 2003 XP Compiler\n')
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end
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local ns
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if self.prox.classtype == 'namespace' then
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output('namespace ',self.prox.name, " {")
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ns = true
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end
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output("class "..self.original_name.." : public "..self.btype..", public ToluaBase {")
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output("public:\n")
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self:add_parent_virtual_methods()
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self:output_methods(self.btype)
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self:output_parent_methods()
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self:add_constructors()
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-- no constructor for pure virtual classes
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if (not self.flags.parent_object.flags.pure_virtual) or enable_pure_virtual then
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self:output_constructors()
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end
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output("};\n\n")
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if ns then
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output("};")
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end
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classClass.supcode(self)
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if self.flags.parent_object.flags.pure_virtual and not enable_pure_virtual then
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output('#endif // __GNUC__ >= 4\n')
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end
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-- output collector for custom class if required
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if self:requirecollection(_collect) and _collect[self.type] then
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output('\n')
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output('/* function to release collected object via destructor */')
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output('#ifdef __cplusplus\n')
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--for i,v in pairs(collect) do
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i,v = self.type, _collect[self.type]
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output('\nstatic int '..v..' (lua_State* tolua_S)')
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output('{')
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output(' '..i..'* self = ('..i..'*) tolua_tousertype(tolua_S,1,0);')
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output(' delete self;')
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output(' return 0;')
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output('}')
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--end
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output('#endif\n\n')
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end
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end
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function classVirtualClass:register(pre)
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-- pure virtual classes can have no default constructors on gcc 4
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if self.flags.parent_object.flags.pure_virtual and not enable_pure_virtual then
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output('#if (__GNUC__ == 4) || (__GNUC__ > 4 )\n')
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end
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classClass.register(self, pre)
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if self.flags.parent_object.flags.pure_virtual and not enable_pure_virtual then
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output('#endif // __GNUC__ >= 4\n')
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end
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end
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--function classVirtualClass:requirecollection(_c)
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-- if self.flags.parent_object.flags.pure_virtual then
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-- return false
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-- end
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-- return classClass.requirecollection(self, _c)
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--end
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function classVirtualClass:output_parent_methods()
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for k,v in ipairs(self.methods) do
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if v.f.access ~= 2 and (not v.f.pure_virtual) and v.f.name ~= 'new' and v.f.name ~= 'delete' then
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local rettype = v.f.mod.." "..v.f.type..v.f.ptr.." "
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local parent_name = rettype..self.btype.."__"..v.f.name
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local par_list = self:get_arg_list(v.f, true)
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local var_list = self:get_arg_list(v.f, false)
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-- the parent's virtual function
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output("\t"..parent_name..par_list.." {")
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output("\t\treturn (",rettype,")"..self.btype.."::"..v.f.name..var_list..";")
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output("\t};")
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end
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end
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end
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function classVirtualClass:output_methods(btype)
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for k,v in ipairs(self.methods) do
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if v.f.name ~= 'new' and v.f.name ~= 'delete' then
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self:output_method(v.f, btype)
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end
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end
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output("\n")
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end
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function classVirtualClass:output_constructors()
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for k,v in ipairs(self.methods) do
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if v.f.name == 'new' then
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local par_list = self:get_arg_list(v.f, true)
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local var_list = self:get_arg_list(v.f, false)
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output("\t",self.original_name,par_list,":",self.btype,var_list,"{};")
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end
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end
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end
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function classVirtualClass:output_method(f, btype)
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if f.access == 2 then -- private
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return
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end
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local ptr
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if f.ret ~= '' then
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ptr = f.ret
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else
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ptr = f.ptr
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end
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local rettype = f.mod.." "..f.type..f.ptr.." "
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local par_list = self:get_arg_list(f, true)
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local var_list = self:get_arg_list(f, false)
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if string.find(rettype, "%s*LuaQtGenericFlags%s*") then
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_,_,rettype = string.find(f.original_sig, "^%s*([^%s]+)%s+")
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end
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-- the caller of the lua method
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output("\t"..rettype.." "..f.name..par_list..f.const.." {")
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local fn = f.cname
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if f.access == 1 then
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fn = "NULL"
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end
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output('\t\tif (push_method("',f.lname,'", ',fn,')) {')
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--if f.type ~= 'void' then
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-- output("\t\t\tint top = lua_gettop(lua_state)-1;")
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--end
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-- push the parameters
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local argn = 0
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for i,arg in ipairs(f.args) do
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if arg.type ~= 'void' then
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local t,ct = isbasic(arg.type)
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if t and t ~= '' then
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if arg.ret == "*" then
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t = 'userdata'
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ct = 'void*'
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end
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output("\t\t\ttolua_push"..t.."(lua_state, ("..ct..")"..arg.name..");");
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else
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local m = arg.ptr
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if m and m~= "" then
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if m == "*" then m = "" end
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output("\t\t\ttolua_pushusertype(lua_state, (void*)"..m..arg.name..", \""..arg.type.."\");")
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else
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output("\t\t\tvoid* tolua_obj" .. argn .." = (void*)new "..arg.type.."("..arg.name..");\n")
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output('\t\t\ttolua_pushusertype_and_takeownership(lua_state, tolua_obj' .. argn .. ', "'..arg.type..'");\n')
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end
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end
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argn = argn+1
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end
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end
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-- call the function
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output("\t\t\tToluaBase::dbcall(lua_state, ",argn+1,", ")
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-- return value
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if f.type ~= 'void' then
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output("1);")
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local t,ct = isbasic(f.type)
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if t and t ~= '' then
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--output("\t\t\treturn ("..rettype..")tolua_to"..t.."(lua_state, top, 0);")
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output("\t\t\t",rettype,"tolua_ret = ("..rettype..")tolua_to"..t.."(lua_state, -1, 0);")
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else
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local mod = ""
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if f.ptr ~= "*" then
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mod = "*("..f.type.."*)"
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end
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--output("\t\t\treturn ("..rettype..")"..mod.."tolua_tousertype(lua_state, top, 0);")
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output("\t\t\t",rettype,"tolua_ret = ("..rettype..")"..mod.."tolua_tousertype(lua_state, -1, 0);")
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end
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output("\t\t\tlua_pop(lua_state, 1);")
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output("\t\t\treturn tolua_ret;")
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else
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output("0);")
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end
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-- handle non-implemeted function
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output("\t\t} else {")
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if f.pure_virtual then
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output('\t\t\tif (lua_state)')
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--output('\t\t\t\ttolua_error(lua_state, "pure-virtual method '..btype.."::"..f.name..' not implemented.", NULL);')
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output('\t\t\t\tLOG("pure-virtual method '..btype.."::"..f.name..' not implemented.");')
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output('\t\t\telse {')
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output('\t\t\t\tLOG("pure-virtual method '..btype.."::"..f.name..' called with no lua_state. Aborting");')
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output('\t\t\t\t::abort();')
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output('\t\t\t};')
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if( rettype == " std::string " ) then
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output('\t\t\treturn "";')
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else
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output('\t\t\treturn (',rettype,')0;')
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end
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else
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output('\t\t\treturn (',rettype,')',btype,'::',f.name,var_list,';')
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end
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output("\t\t};")
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output("\t};")
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end
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function VirtualClass()
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local parent = classContainer.curr
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pop()
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local name = "Lua__"..parent.original_name
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local c = _Class(_Container{name=name, base=parent.name, extra_bases=nil})
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setmetatable(c, classVirtualClass)
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local ft = getnamespace(c.parent)..c.original_name
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append_global_type(ft, c)
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push(parent)
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c.flags.parent_object = parent
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c.methods = {}
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push(c)
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c:parse("\nvoid tolua__set_instance(_lstate L, lua_Object lo);\n")
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pop()
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return c
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end
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function post_output_hook()
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print("Bindings have been generated.")
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end
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