init
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aixianling
295
sdk/tolua++/lua/variable.lua
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295
sdk/tolua++/lua/variable.lua
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-- tolua: variable class
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-- Written by Waldemar Celes
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-- TeCGraf/PUC-Rio
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-- Jul 1998
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-- $Id: variable.lua 1004 2006-02-27 13:03:20Z lindquist $
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-- This code is free software; you can redistribute it and/or modify it.
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-- The software provided hereunder is on an "as is" basis, and
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-- the author has no obligation to provide maintenance, support, updates,
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-- enhancements, or modifications.
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-- Variable class
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-- Represents a extern variable or a public member of a class.
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-- Stores all fields present in a declaration.
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classVariable = {
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_get = {}, -- mapped get functions
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_set = {}, -- mapped set functions
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}
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classVariable.__index = classVariable
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setmetatable(classVariable,classDeclaration)
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-- Print method
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function classVariable:print (ident,close)
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print(ident.."Variable{")
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print(ident.." mod = '"..self.mod.."',")
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print(ident.." type = '"..self.type.."',")
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print(ident.." ptr = '"..self.ptr.."',")
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print(ident.." name = '"..self.name.."',")
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if self.dim then print(ident.." dim = '"..self.dim.."',") end
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print(ident.." def = '"..self.def.."',")
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print(ident.." ret = '"..self.ret.."',")
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print(ident.."}"..close)
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end
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-- Generates C function name
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function classVariable:cfuncname (prefix)
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local parent = ""
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local unsigned = ""
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local ptr = ""
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local p = self:inmodule() or self:innamespace() or self:inclass()
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if p then
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if self.parent.classtype == 'class' then
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parent = "_" .. self.parent.type
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else
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parent = "_" .. p
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end
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end
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if strfind(self.mod,"(unsigned)") then
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unsigned = "_unsigned"
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end
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if self.ptr == "*" then ptr = "_ptr"
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elseif self.ptr == "&" then ptr = "_ref"
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end
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local name = prefix .. parent .. unsigned .. "_" .. gsub(self.lname or self.name,".*::","") .. ptr
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name = clean_template(name)
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return name
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end
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-- check if it is a variable
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function classVariable:isvariable ()
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return true
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end
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-- get variable value
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function classVariable:getvalue (class,static, prop_get)
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local name
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if prop_get then
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name = prop_get.."()"
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else
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name = self.name
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end
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if class and static then
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return self.parent.type..'::'..name
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elseif class then
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return 'self->'..name
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else
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return name
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end
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end
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-- get variable pointer value
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function classVariable:getpointervalue (class,static)
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if class and static then
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return class..'::p'
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elseif class then
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return 'self->p'
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else
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return 'p'
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end
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end
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-- Write binding functions
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function classVariable:supcode ()
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local class = self:inclass()
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local prop_get,prop_set
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if string.find(self.mod, 'tolua_property') then
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_,_,type = string.find(self.mod, "tolua_property__([^%s]*)")
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type = type or "default"
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prop_get,prop_set = get_property_methods(type, self.name)
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self.mod = string.gsub(self.mod, "tolua_property[^%s]*", "")
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end
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-- get function ------------------------------------------------
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if class then
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output("/* get function:",self.name," of class ",class," */")
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else
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output("/* get function:",self.name," */")
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end
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self.cgetname = self:cfuncname("tolua_get")
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output("#ifndef TOLUA_DISABLE_"..self.cgetname)
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output("\nstatic int",self.cgetname,"(lua_State* tolua_S)")
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output("{")
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-- declare self, if the case
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local _,_,static = strfind(self.mod,'^%s*(static)')
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if class and static==nil then
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output(' ',self.parent.type,'*','self = ')
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output('(',self.parent.type,'*) ')
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output('tolua_tousertype(tolua_S,1,0);')
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elseif static then
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_,_,self.mod = strfind(self.mod,'^%s*static%s%s*(.*)')
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end
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-- check self value
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if class and static==nil then
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output('#ifndef TOLUA_RELEASE\n')
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output(' if (!self) tolua_error(tolua_S,"invalid \'self\' in accessing variable \''..self.name..'\'",NULL);');
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output('#endif\n')
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end
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-- return value
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if string.find(self.mod, 'tolua_inherits') then
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output('#ifdef __cplusplus\n')
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output(' tolua_pushusertype(tolua_S,(void*)static_cast<'..self.type..'*>(self), "',self.type,'");')
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output('#else\n')
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output(' tolua_pushusertype(tolua_S,(void*)(('..self.type..'*)self), "',self.type,'");')
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output('#endif\n')
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else
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local t,ct = isbasic(self.type)
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if t then
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output(' tolua_push'..t..'(tolua_S,(',ct,')'..self:getvalue(class,static,prop_get)..');')
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else
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t = self.type
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if self.ptr == '&' or self.ptr == '' then
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output(' tolua_pushusertype(tolua_S,(void*)&'..self:getvalue(class,static,prop_get)..',"',t,'");')
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else
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output(' tolua_pushusertype(tolua_S,(void*)'..self:getvalue(class,static,prop_get)..',"',t,'");')
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end
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end
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end
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output(' return 1;')
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output('}')
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output('#endif //#ifndef TOLUA_DISABLE\n')
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output('\n')
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-- set function ------------------------------------------------
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if not (strfind(self.type,'const%s+') or string.find(self.mod, 'tolua_readonly') or string.find(self.mod, 'tolua_inherits')) then
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if class then
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output("/* set function:",self.name," of class ",class," */")
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else
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output("/* set function:",self.name," */")
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end
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self.csetname = self:cfuncname("tolua_set")
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output("#ifndef TOLUA_DISABLE_"..self.csetname)
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output("\nstatic int",self.csetname,"(lua_State* tolua_S)")
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output("{")
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-- declare self, if the case
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if class and static==nil then
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output(' ',self.parent.type,'*','self = ')
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output('(',self.parent.type,'*) ')
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output('tolua_tousertype(tolua_S,1,0);')
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-- check self value
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end
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-- check types
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output('#ifndef TOLUA_RELEASE\n')
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output(' tolua_Error tolua_err;')
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if class and static==nil then
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output(' if (!self) tolua_error(tolua_S,"invalid \'self\' in accessing variable \''..self.name..'\'",NULL);');
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elseif static then
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_,_,self.mod = strfind(self.mod,'^%s*static%s%s*(.*)')
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end
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-- check variable type
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output(' if (!'..self:outchecktype(2)..')')
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output(' tolua_error(tolua_S,"#vinvalid type in variable assignment.",&tolua_err);')
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output('#endif\n')
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-- assign value
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local def = 0
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if self.def ~= '' then def = self.def end
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if self.type == 'char*' and self.dim ~= '' then -- is string
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output(' strncpy(')
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if class and static then
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output(self.parent.type..'::'..self.name)
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elseif class then
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output('self->'..self.name)
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else
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output(self.name)
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end
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output(',tolua_tostring(tolua_S,2,',def,'),',self.dim,'-1);')
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else
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local ptr = ''
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if self.ptr~='' then ptr = '*' end
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output(' ')
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local name = prop_set or self.name
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if class and static then
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output(self.parent.type..'::'..name)
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elseif class then
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output('self->'..name)
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else
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output(name)
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end
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local t = isbasic(self.type)
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if prop_set then
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output('(')
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else
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output(' = ')
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end
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if not t and ptr=='' then output('*') end
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output('((',self.mod,self.type)
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if not t then
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output('*')
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end
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output(') ')
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if t then
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if isenum(self.type) then
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output('(int) ')
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end
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output('tolua_to'..t,'(tolua_S,2,',def,'))')
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else
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output('tolua_tousertype(tolua_S,2,',def,'))')
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end
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if prop_set then
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output(")")
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end
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output(";")
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end
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output(' return 0;')
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output('}')
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output('#endif //#ifndef TOLUA_DISABLE\n')
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output('\n')
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end
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end
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function classVariable:register (pre)
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if not self:check_public_access() then
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return
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end
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pre = pre or ''
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local parent = self:inmodule() or self:innamespace() or self:inclass()
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if not parent then
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if classVariable._warning==nil then
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warning("Mapping variable to global may degrade performance")
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classVariable._warning = 1
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end
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end
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if self.csetname then
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output(pre..'tolua_variable(tolua_S,"'..self.lname..'",'..self.cgetname..','..self.csetname..');')
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else
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output(pre..'tolua_variable(tolua_S,"'..self.lname..'",'..self.cgetname..',NULL);')
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end
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end
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-- Internal constructor
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function _Variable (t)
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setmetatable(t,classVariable)
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append(t)
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return t
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end
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-- Constructor
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-- Expects a string representing the variable declaration.
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function Variable (s)
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return _Variable (Declaration(s,'var'))
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end
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