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source: code/branches/SuperOrxoBros_HS18/src/external/tolua/lua/variable.lua @ 12177

Last change on this file since 12177 was 12177, checked in by siramesh, 5 years ago

Super Orxo Bros Final (Sidharth Ramesh, Nisa Balta, Jeff Ren)

File size: 8.7 KB
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1-- tolua: variable class
2-- Written by Waldemar Celes
3-- TeCGraf/PUC-Rio
4-- Jul 1998
5-- $Id: $
6
7-- This code is free software; you can redistribute it and/or modify it.
8-- The software provided hereunder is on an "as is" basis, and
9-- the author has no obligation to provide maintenance, support, updates,
10-- enhancements, or modifications.
11
12
13-- Variable class
14-- Represents a extern variable or a public member of a class.
15-- Stores all fields present in a declaration.
16classVariable = {
17    _get = {},   -- mapped get functions
18    _set = {},   -- mapped set functions
19}
20classVariable.__index = classVariable
21setmetatable(classVariable,classDeclaration)
22
23-- Print method
24function classVariable:print (ident,close)
25    print(ident.."Variable{")
26    print(ident.." mod  = '"..self.mod.."',")
27    print(ident.." type = '"..self.type.."',")
28    print(ident.." ptr  = '"..self.ptr.."',")
29    print(ident.." name = '"..self.name.."',")
30    if self.dim then print(ident.." dim = '"..self.dim.."',") end
31    print(ident.." def  = '"..self.def.."',")
32    print(ident.." ret  = '"..self.ret.."',")
33    print(ident.."}"..close)
34end
35
36-- Generates C function name
37function classVariable:cfuncname (prefix)
38    local parent = ""
39    local unsigned = ""
40    local ptr = ""
41
42    local p = self:inmodule() or self:innamespace() or self:inclass()
43
44    if p then
45        if self.parent.classtype == 'class' then
46            parent = "_" .. self.parent.type
47        else
48            parent = "_" .. p
49        end
50    end
51
52    if strfind(self.mod,"(unsigned)") then
53        unsigned = "_unsigned"
54    end
55
56    if self.ptr == "*" then ptr = "_ptr"
57    elseif self.ptr == "&" then ptr = "_ref"
58    end
59
60    local name =  prefix .. parent .. unsigned .. "_" .. gsub(self.lname or self.name,".*::","") .. ptr
61
62    name = clean_template(name)
63    return name
64
65end
66
67-- check if it is a variable
68function classVariable:isvariable ()
69    return true
70end
71
72-- get variable value
73function classVariable:getvalue (class,static, prop_get)
74
75    local name
76    if prop_get then
77
78        name = prop_get.."()"
79    else
80        name = self.name
81    end
82
83    if class and static then
84        return self.parent.type..'::'..name
85    elseif class then
86        return 'self->'..name
87    else
88        return name
89    end
90end
91
92-- get variable pointer value
93function classVariable:getpointervalue (class,static)
94    if class and static then
95        return class..'::p'
96    elseif class then
97        return 'self->p'
98    else
99        return 'p'
100    end
101end
102
103-- Write binding functions
104function classVariable:supcode ()
105
106 local class = self:inclass()
107
108    local prop_get,prop_set
109    if string.find(self.mod, 'tolua_property') then
110
111        _,_,type = string.find(self.mod, "tolua_property__([^%s]*)")
112        type = type or "default"
113        prop_get,prop_set = get_property_methods(type, self.name)
114        self.mod = string.gsub(self.mod, "tolua_property[^%s]*", "")
115    end
116
117    -- get function ------------------------------------------------
118    if class then
119        output("/* get function:",self.name," of class ",class," */")
120    else
121        output("/* get function:",self.name," */")
122    end
123    self.cgetname = self:cfuncname("tolua_get")
124    output("#ifndef TOLUA_DISABLE_"..self.cgetname)
125    output("\nstatic int",self.cgetname,"(lua_State* tolua_S)")
126    output("{")
127
128    -- declare self, if the case
129    local _,_,static = strfind(self.mod,'^%s*(static)')
130    if class and static==nil then
131        output(' ',self.parent.type,'*','self = ')
132        output('(',self.parent.type,'*) ')
133        output('tolua_tousertype(tolua_S,1,0);')
134    elseif static then
135        _,_,self.mod = strfind(self.mod,'^%s*static%s%s*(.*)')
136    end
137
138
139    -- check self value
140    if class and static==nil then
141        output('#ifndef TOLUA_RELEASE\n')
142        output('  if (!self) tolua_error(tolua_S,"invalid \'self\' in accessing variable \''..self.name..'\'",NULL);');
143        output('#endif\n')
144    end
145
146    -- return value
147    if string.find(self.mod, 'tolua_inherits') then
148        output('#ifdef __cplusplus\n')
149        output('  tolua_pushusertype(tolua_S,(void*)static_cast<'..self.type..'*>(self), "',self.type,'");')
150        output('#else\n')
151        output('  tolua_pushusertype(tolua_S,(void*)(('..self.type..'*)self), "',self.type,'");')
152        output('#endif\n')
153    else
154        local t,ct = isbasic(self.type)
155        if t then
156            output('  tolua_push'..t..'(tolua_S,(',ct,')'..self:getvalue(class,static,prop_get)..');')
157        else
158            t = self.type
159            if self.ptr == '&' or self.ptr == '' then
160                output('  tolua_pushusertype(tolua_S,(void*)&'..self:getvalue(class,static,prop_get)..',"',t,'");')
161            else
162                output('  tolua_pushusertype(tolua_S,(void*)'..self:getvalue(class,static,prop_get)..',"',t,'");')
163            end
164        end
165    end
166    output(' return 1;')
167    output('}')
168    output('#endif //#ifndef TOLUA_DISABLE\n')
169    output('\n')
170
171    -- set function ------------------------------------------------
172    if not (strfind(self.type,'const%s+') or string.find(self.mod, 'tolua_readonly') or string.find(self.mod, 'tolua_inherits'))  then
173    if class then
174        output("/* set function:",self.name," of class ",class," */")
175    else
176        output("/* set function:",self.name," */")
177    end
178    self.csetname = self:cfuncname("tolua_set")
179    output("#ifndef TOLUA_DISABLE_"..self.csetname)
180    output("\nstatic int",self.csetname,"(lua_State* tolua_S)")
181    output("{")
182
183    -- declare self, if the case
184    if class and static==nil then
185        output(' ',self.parent.type,'*','self = ')
186        output('(',self.parent.type,'*) ')
187        output('tolua_tousertype(tolua_S,1,0);')
188        -- check self value
189    end
190    -- check types
191    output('#ifndef TOLUA_RELEASE\n')
192    output('  tolua_Error tolua_err;')
193    if class and static==nil then
194        output('  if (!self) tolua_error(tolua_S,"invalid \'self\' in accessing variable \''..self.name..'\'",NULL);');
195    elseif static then
196        _,_,self.mod = strfind(self.mod,'^%s*static%s%s*(.*)')
197    end
198
199    -- check variable type
200    output('  if (!'..self:outchecktype(2)..')')
201    output('   tolua_error(tolua_S,"#vinvalid type in variable assignment.",&tolua_err);')
202    output('#endif\n')
203
204    -- assign value
205    local def = 0
206    if self.def ~= '' then def = self.def end
207    if self.type == 'char*' and self.dim ~= '' then -- is string
208        output(' strncpy(')
209        if class and static then
210            output(self.parent.type..'::'..self.name)
211            elseif class then
212                output('self->'..self.name)
213            else
214                output(self.name)
215            end
216            output(',tolua_tostring(tolua_S,2,',def,'),',self.dim,'-1);')
217        else
218            local ptr = ''
219            if self.ptr~='' then ptr = '*' end
220            output(' ')
221            local name = prop_set or self.name
222            if class and static then
223                output(self.parent.type..'::'..name)
224            elseif class then
225                output('self->'..name)
226            else
227                output(name)
228            end
229            local t = isbasic(self.type)
230            if prop_set then
231                output('(')
232            else
233                output(' = ')
234            end
235            if not t and ptr=='' then output('*') end
236            output('((',self.mod,self.type)
237            if not t then
238                output('*')
239            end
240            output(') ')
241            if t then
242                if isenum(self.type) then
243                    output('(int) ')
244                end
245                output('tolua_to'..t,'(tolua_S,2,',def,'))')
246            else
247                output('tolua_tousertype(tolua_S,2,',def,'))')
248            end
249            if prop_set then
250                output(")")
251            end
252            output(";")
253        end
254        output(' return 0;')
255        output('}')
256        output('#endif //#ifndef TOLUA_DISABLE\n')
257        output('\n')
258    end
259
260end
261
262function classVariable:register (pre)
263
264    if not self:check_public_access() then
265        return
266    end
267    pre = pre or ''
268    local parent = self:inmodule() or self:innamespace() or self:inclass()
269    if not parent then
270        if classVariable._warning==nil then
271            warning("Mapping variable to global may degrade performance")
272            classVariable._warning = 1
273        end
274    end
275    if self.csetname then
276        output(pre..'tolua_variable(tolua_S,"'..self.lname..'",'..self.cgetname..','..self.csetname..');')
277    else
278        output(pre..'tolua_variable(tolua_S,"'..self.lname..'",'..self.cgetname..',NULL);')
279    end
280end
281
282-- Internal constructor
283function _Variable (t)
284    setmetatable(t,classVariable)
285    append(t)
286    return t
287end
288
289-- Constructor
290-- Expects a string representing the variable declaration.
291function Variable (s)
292    return _Variable (Declaration(s,'var'))
293end
294
295
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