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-- tolua: package class
-- Written by Waldemar Celes
-- TeCGraf/PUC-Rio
-- Jul 1998
-- $Id: package.lua,v 1.4 2002/01/03 13:45:08 takkaria Exp $
-- This code is free software; you can redistribute it and/or modify it.
-- The software provided hereunder is on an "as is" basis, and
-- the author has no obligation to provide maintenance, support, updates,
-- enhancements, or modifications.
-- Package class
-- Represents the whole package being bound.
-- The following fields are stored:
-- {i} = list of objects in the package.
classPackage = {
_base = classContainer,
type = 'package'
}
settag(classPackage,tolua_tag)
-- Print method
function classPackage:print ()
print("Package: "..self.name)
local i=1
while self[i] do
self[i]:print("","")
i = i+1
end
end
function classPackage:preprocess ()
self.code = "\n"..self.code -- add a blank sentinel line
-- avoid preprocessing verbatim lines
local V = {}
self.code = gsub(self.code,"\n(%s*%$[^%[%]][^\n]*)",function (v)
tinsert(%V,v)
return "\n$"..getn(%V).."$"
end)
-- avoid preprocessing embedded lua code
local C = {}
self.code = gsub(self.code,"\n%s*%$%[","\1") -- deal with embedded Lua code
self.code = gsub(self.code,"\n%s*%$%]","\2")
self.code = gsub(self.code,"(%b\1\2)", function (c)
tinsert(%C,c)
return "\n$["..getn(%C).."]$"
end)
-- perform global substitution
self.code = gsub(self.code,"(//[^\n]*)","") -- eliminate C++ comments
self.code = gsub(self.code,"/%*","\1")
self.code = gsub(self.code,"%*/","\2")
self.code = gsub(self.code,"%b\1\2","")
self.code = gsub(self.code,"\1","/%*")
self.code = gsub(self.code,"\2","%*/")
self.code = gsub(self.code,"%s*@%s*","@") -- eliminate spaces beside @
self.code = gsub(self.code,"%s?inline(%s)","%1") -- eliminate 'inline' keyword
self.code = gsub(self.code,"%s?extern(%s)","%1") -- eliminate 'extern' keyword
self.code = gsub(self.code,"%s?virtual(%s)","%1") -- eliminate 'virtual' keyword
self.code = gsub(self.code,"public:","") -- eliminate 'public:' keyword
self.code = gsub(self.code,"([^%w_])void%s*%*","%1_userdata ") -- substitute 'void*'
self.code = gsub(self.code,"([^%w_])void%s*%*","%1_userdata ") -- substitute 'void*'
self.code = gsub(self.code,"([^%w_])char%s*%*","%1_cstring ") -- substitute 'char*'
-- restore embedded code
self.code = gsub(self.code,"%$%[(%d+)%]%$",function (n)
return %C[tonumber(n)]
end)
-- restore verbatim lines
self.code = gsub(self.code,"%$(%d+)%$",function (n)
return %V[tonumber(n)]
end)
end
-- translate verbatim
function classPackage:preamble ()
output('/*\n')
output('** Lua binding: '..self.name..'\n')
output('** Generated automatically by '..TOLUA_VERSION..'\n')
output('*/\n\n')
output('#include "lua/tolua.h"\n\n')
if not flags.h then
output('/* Exported function */')
output('int tolua_'..self.name..'_open (lua_State* tolua_S);')
output('void tolua_'..self.name..'_close (lua_State* tolua_S);')
output('\n')
end
local i=1
while self[i] do
self[i]:preamble()
i = i+1
end
output('\n')
output('/* function to register type */')
output('static void toluaI_reg_types (lua_State* tolua_S)')
output('{')
foreach(_usertype,function(n,v) output(' tolua_usertype(tolua_S,"',v,'");') end)
output('}')
output('\n')
output('/* error messages */')
output('#define TOLUA_ERR_SELF tolua_error(tolua_S,\"invalid \'self\'\")')
output('#define TOLUA_ERR_ASSIGN tolua_error(tolua_S,\"#vinvalid type in variable assignment.\")')
output('\n')
end
-- register package
-- write package open function
function classPackage:register ()
output("/* Open function */")
output("int tolua_"..self.name.."_open (lua_State* tolua_S)")
output("{")
output(" tolua_open(tolua_S);")
output(" toluaI_reg_types(tolua_S);")
local i=1
while self[i] do
self[i]:register()
i = i+1
end
output(" return 1;")
output("}")
end
-- unregister package
-- write package close function
function classPackage:unregister ()
output("/* Close function */")
output("void tolua_"..self.name.."_close (lua_State* tolua_S)")
output("{")
local i=1
while self[i] do
self[i]:unregister()
i = i+1
end
output("}")
end
-- write header file
function classPackage:header ()
output('/*\n') output('** Lua binding: '..self.name..'\n')
output('** Generated automatically by '..TOLUA_VERSION..'.\n')
output('*/\n\n')
if not flags.h then
output('/* Exported function */')
output('int tolua_'..self.name..'_open (lua_State* tolua_S);')
output('void tolua_'..self.name..'_close (lua_State* tolua_S);')
output('\n')
end
end
-- Internal constructor
function _Package (t)
t._base = classPackage
settag(t,tolua_tag)
return t
end
-- Constructor
-- Expects the base file name.
-- It assumes the file has extension ".pkg".
function Package (name)
-- read file
local code = read("*a")
code = "\n" .. code -- add sentinel
-- deal with include directive
local nsubst
repeat
code,nsubst = gsub(code,"\n%s*%$<(.-)>%s*\n",function (fn)
local fp,msg = openfile(fn,'r')
if not fp then
error('#'..msg..': '..fn)
end
local s = read(fp,'*a')
closefile(fp)
return "\n" .. s
end)
until nsubst==0
-- deal with include directive for C/C++ header files
local nsubst
repeat
code,nsubst =
gsub(code,"\n%s*%${(.-)}%s*\n",
function (fn)
local fp,msg = openfile(fn,'r')
if not fp then
error('#'..msg..': '..fn)
end
local s = read(fp,'*a')
closefile(fp)
-- extract marked code
local T = {code="\n"}
s= "\n" .. s .. "\n" -- add blank lines as sentinels
-- extract one-line statments
gsub(s,"\n(.-)[Tt][Oo][Ll][Uu][Aa]_[Ee][Xx][Pp][Oo][Rr][Tt][^\n]*\n",
function (c) %T.code = %T.code .. c .. "\n" end
)
-- extract multiline statments
gsub(s,"\n[^\n]*[Tt][Oo][Ll][Uu][Aa]_[Bb][Ee][Gg][Ii][Nn][^\n]*"..
"(.-)" ..
"\n[^\n]*[Tt][Oo][Ll][Uu][Aa]_[Ee][Nn][Dd][^\n]*\n",
function (c) %T.code = %T.code .. c .. "\n" end
)
return T.code
end)
until nsubst==0
local t = _Package(_Container{name=name, code=code})
push(t)
t:preprocess()
t:parse(t.code)
pop()
return t
end
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