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-- tolua: basic utility functions
-- Written by Waldemar Celes
-- TeCGraf/PUC-Rio
-- Jul 1998
-- $Id: basic.lua,v 1.2 2001/11/26 23:00:23 darkgod 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.
-- Basic C types and their corresponding Lua types
-- All occurrences of "char*" will be replaced by "_cstring",
-- and all occurrences of "void*" will be replaced by "_userdata"
_basic = {
['void'] = '',
['char'] = 'number',
['int'] = 'number',
['short'] = 'number',
['long'] = 'number',
['_cstring'] = 'string',
['_userdata'] = 'userdata',
['char*'] = 'string',
['void*'] = 'userdata',
['bool'] = 'bool',
['LUA_VALUE'] = 'value',
['byte'] = 'number',
['s16b'] = 'number',
['u16b'] = 'number',
['s32b'] = 'number',
['u32b'] = 'number',
}
_basic_tag = {
['void'] = '',
['char'] = 'LUA_TNUMBER',
['int'] = 'LUA_TNUMBER',
['short'] = 'LUA_TNUMBER',
['long'] = 'LUA_TNUMBER',
['_cstring'] = 'LUA_TSTRING',
['_userdata'] = 'LUA_TUSERDATA',
['char*'] = 'LUA_TSTRING',
['void*'] = 'LUA_TUSERDATA',
['bool'] = 'tolua_tag(tolua_S,"bool")',
['byte'] = 'LUA_TNUMBER',
['s16b'] = 'LUA_TNUMBER',
['u16b'] = 'LUA_TNUMBER',
['s32b'] = 'LUA_TNUMBER',
['u32b'] = 'LUA_TNUMBER',
}
_basic_ctype = {
number = "long",
string = "const char*",
userdata = "void*",
bool = "int",
}
-- List of user defined types
-- Each type corresponds to a variable name that stores its tag value.
_usertype = {}
-- Tag method to provide inheritance
function tolua_index (t,f)
if f == '_base' then -- to avoid loop
return tolua_old_index(t,f)
else
return t._base[f]
end
end
tolua_tag = newtag()
tolua_old_index = settagmethod(tolua_tag,"index",tolua_index)
-- Error handler
function tolua_error (s)
local out = _OUTPUT
_OUTPUT = _STDERR
if strsub(s,1,1) == '#' then
write("\n** tolua: "..strsub(s,2)..".\n\n")
else
write("\n** tolua internal error: "..s..".\n\n")
return
end
if _curr_code then
local _,_,s = strfind(_curr_code,"^%s*(.-\n)") -- extract first line
if s==nil then s = _curr_code end
s = gsub(s,"_userdata","void*") -- return with 'void*'
s = gsub(s,"_cstring","char*") -- return with 'char*'
write("Code being processed:\n"..s.."\n")
end
_OUTPUT = out
end
_ERRORMESSAGE = tolua_error
-- register an user defined type
function regtype (t)
if not istype(t) then
_usertype[t] = t
end
return t
end
-- return tag name
function tagvar(type,const)
if type == '' or type == 'void' then
return type,0
else
local m,t = findtypedef(type)
if isbasic(t) then
return t, _basic_tag[t]
end
if strfind(m,'const') then const = 'const' end
regtype(t)
if const and const ~= '' then
t = 'const '..t
end
return t,'tolua_tag(tolua_S,"'..t..'")'
end
end
-- check if basic type
function isbasic (type)
local m,t = findtypedef(type)
local b = _basic[t]
if b then
return b,_basic_ctype[b]
end
return nil
end
-- check if type
function istype (t)
return _basic[t] or _usertype[t] or istypedef(t)
end
-- split string using a token
function split (s,t)
local l = {n=0}
local f = function (s)
%l.n = %l.n + 1
%l[%l.n] = s
end
local p = "%s*(.-)%s*"..t.."%s*"
s = gsub(s,"^%s+","")
s = gsub(s,"%s+$","")
s = gsub(s,p,f)
l.n = l.n + 1
l[l.n] = gsub(s,"(%s%s*)$","")
return l
end
-- concatenate strings of a table
function concat (t,f,l)
local s = ''
local i=f
while i<=l do
s = s..t[i]
i = i+1
if i <= l then s = s..' ' end
end
return s
end
-- output line
function output (...)
local i=1
while i<=arg.n do
if _cont and not strfind(_cont,'[%(,"]') and
strfind(arg[i],"^[%a_~]") then
write(' ')
end
write(arg[i])
if arg[i] ~= '' then
_cont = strsub(arg[i],-1,-1)
end
i = i+1
end
if strfind(arg[arg.n],"[%/%)%;%{%}]$") then
_cont=nil write('\n')
end
end
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