Add: lua tests

tests/Lua.Tests/FileHelper.cs

@@ -0,0 +1,9 @@
+using System.Runtime.CompilerServices;
+
+public static class FileHelper
+{
+    public static string GetAbsolutePath(string relativePath, [CallerFilePath] string callerFilePath = "")
+    {
+        return Path.Combine(Path.GetDirectoryName(callerFilePath)!, relativePath);
+    }
+}

tests/Lua.Tests/Lua.Tests.csproj

@@ -17,8 +17,8 @@
     <PackageReference Include="coverlet.collector" Version="6.0.0" />
   </ItemGroup>
 
-  <ItemGroup>
-    <ProjectReference Include="..\..\src\Lua\Lua.csproj" />
+  <ItemGroup>
+    <ProjectReference Include="..\..\src\Lua\Lua.csproj" />
   </ItemGroup>
 
 </Project>

tests/Lua.Tests/LuaTests.cs

@@ -0,0 +1,10 @@
+namespace Lua.Tests;
+
+public class LuaTests
+{
+    [Test]
+    public async Task Test_Closure()
+    {
+        await LuaState.Create().DoFileAsync(FileHelper.GetAbsolutePath("tests-lua/closure.lua"));
+    }
+}

tests/Lua.Tests/tests-lua/all.lua

@@ -0,0 +1,259 @@
+#!../lua
+
+local version = "Lua 5.2"
+if _VERSION ~= version then
+  io.stderr:write("\nThis test suite is for ", version, ", not for ", _VERSION,
+    "\nExiting tests\n")
+  return
+end
+
+
+-- next variables control the execution of some tests
+-- true means no test (so an undefined variable does not skip a test)
+-- defaults are for Linux; test everything
+
+_soft = false      -- true to avoid long or memory consuming tests
+_port = false      -- true to avoid non-portable tests
+_no32 = false      -- true to avoid tests that assume 32 bits
+_nomsg = false     -- true to avoid messages about tests not performed
+_noposix = false   -- false assumes LUA_USE_POSIX
+_nolonglong = false  -- false assumes LUA_USE_LONGLONG
+_noformatA = false   -- false assumes LUA_USE_AFORMAT
+
+
+local usertests = rawget(_G, "_U")
+
+if usertests then
+  -- tests for sissies ;)  Avoid problems
+  _soft = true
+  _port = true
+  _no32 = true
+  _nomsg = true
+  _noposix = true
+  _nolonglong = true
+  _noformatA = true; 
+end
+
+-- no "internal" tests for user tests
+if usertests then T = nil end
+
+T = rawget(_G, "T")  -- avoid problems with 'strict' module
+
+package.path = "?;./?.lua" .. package.path
+
+math.randomseed(0)
+
+collectgarbage("setstepmul", 200)
+collectgarbage("setpause", 200)
+
+
+--[=[
+  example of a long [comment],
+  [[spanning several [lines]]]
+
+]=]
+
+print("current path:\n****" .. package.path .. "****\n")
+
+
+local c = os.clock()
+
+local collectgarbage = collectgarbage
+
+do   -- (
+
+-- track messages for tests not performed
+local msgs = {}
+function Message (m)
+  if not _nomsg then
+    print(m)
+    msgs[#msgs+1] = string.sub(m, 3, -3)
+  end
+end
+
+assert(os.setlocale"C")
+
+local T,print,format,write,assert,type,unpack,floor =
+      T,print,string.format,io.write,assert,type,table.unpack,math.floor
+
+-- use K for 1000 and M for 1000000 (not 2^10 -- 2^20)
+local function F (m)
+  local function round (m)
+    m = m + 0.04999
+    return m - (m % 0.1)     -- keep one decimal digit
+  end
+  if m < 1000 then return m
+  else
+    m = m / 1000
+    if m < 1000 then return round(m).."K"
+    else
+      return round(m/1000).."M"
+    end
+  end
+end
+
+local showmem
+if not T then
+  local max = 0
+  showmem = function ()
+    local m = collectgarbage("count") * 1024
+    max = (m > max) and m or max
+    print(format("    ---- total memory: %s, max memory: %s ----\n",
+          F(m), F(max)))
+  end
+else
+  showmem = function ()
+    T.checkmemory()
+    local total, numblocks, maxmem = T.totalmem()
+    local count = collectgarbage("count")
+    print(format(
+      "\n    ---- total memory: %s (%.0fK), max use: %s,  blocks: %d\n",
+      F(total), count, F(maxmem), numblocks))
+    print(format("\t(strings:  %d, tables: %d, functions: %d, "..
+                 "\n\tudata: %d, threads: %d)",
+                 T.totalmem"string", T.totalmem"table", T.totalmem"function",
+                 T.totalmem"userdata", T.totalmem"thread"))
+  end
+end
+
+
+--
+-- redefine dofile to run files through dump/undump
+--
+local function report (n) print("\n***** FILE '"..n.."'*****") end
+local olddofile = dofile
+dofile = function (n)
+  showmem()
+  report(n)
+  local f = assert(loadfile(n))
+  local b = string.dump(f)
+  f = assert(load(b))
+  return f()
+end
+
+dofile('main.lua')
+
+do
+  local next, setmetatable, stderr = next, setmetatable, io.stderr
+  local mt = {}
+  -- each time a table is collected, create a new one to be
+  -- collected next cycle
+  mt.__gc = function (o)
+    stderr:write'.'    -- mark progress
+    local n = setmetatable({}, mt)   -- replicate object
+    o = nil
+    local a,b,c,d,e = nil    -- erase 'o' from the stack
+  end
+  local n = setmetatable({}, mt)   -- replicate object
+end
+
+report"gc.lua"
+local f = assert(loadfile('gc.lua'))
+f()
+
+collectgarbage("generational")
+dofile('db.lua')
+assert(dofile('calls.lua') == deep and deep)
+olddofile('strings.lua')
+olddofile('literals.lua')
+assert(dofile('attrib.lua') == 27)
+
+collectgarbage("incremental")   -- redo some tests in incremental mode
+olddofile('strings.lua')
+olddofile('literals.lua')
+dofile('constructs.lua')
+dofile('api.lua')
+
+collectgarbage("generational")   -- back to generational mode
+collectgarbage("setpause", 200)
+collectgarbage("setmajorinc", 500)
+assert(dofile('locals.lua') == 5)
+dofile('constructs.lua')
+dofile('code.lua')
+if not _G._soft then
+  report('big.lua')
+  local f = coroutine.wrap(assert(loadfile('big.lua')))
+  assert(f() == 'b')
+  assert(f() == 'a')
+end
+dofile('nextvar.lua')
+dofile('pm.lua')
+dofile('api.lua')
+assert(dofile('events.lua') == 12)
+dofile('vararg.lua')
+dofile('closure.lua')
+dofile('coroutine.lua')
+dofile('goto.lua')
+dofile('errors.lua')
+dofile('math.lua')
+dofile('sort.lua')
+dofile('bitwise.lua')
+assert(dofile('verybig.lua') == 10); collectgarbage()
+dofile('files.lua')
+
+if #msgs > 0 then
+  print("\ntests not performed:")
+  for i=1,#msgs do
+    print(msgs[i])
+  end
+  print()
+end
+
+print("final OK !!!")
+
+local debug = require "debug"
+
+debug.sethook(function (a) assert(type(a) == 'string') end, "cr")
+
+-- to survive outside block
+_G.showmem = showmem
+
+end   --)
+
+local _G, showmem, print, format, clock, assert, open =
+      _G, showmem, print, string.format, os.clock, assert, io.open
+
+-- file with time of last performed test
+local fname = T and "time-debug.txt" or "time.txt"
+local lasttime
+
+if not usertests then
+  -- open file with time of last performed test
+  local f = io.open(fname)
+  if f then
+    lasttime = assert(tonumber(f:read'*a'))
+    f:close();
+  else   -- no such file; assume it is recording time for first time
+    lasttime = nil
+  end
+end
+
+-- erase (almost) all globals
+print('cleaning all!!!!')
+for n in pairs(_G) do
+  if not ({___Glob = 1, tostring = 1})[n] then
+    _G[n] = nil
+  end
+end
+
+
+collectgarbage()
+collectgarbage()
+collectgarbage()
+collectgarbage()
+collectgarbage()
+collectgarbage();showmem()
+
+local time = clock() - c
+
+print(format("\n\ntotal time: %.2f\n", time))
+
+if not usertests then
+  lasttime = lasttime or time    -- if there is no last time, ignore difference
+  -- check whether current test time differs more than 5% from last time
+  local diff = (time - lasttime) / time
+  local tolerance = 0.05    -- 5%
+  assert(diff < tolerance and diff > -tolerance)
+  assert(open(fname, "w")):write(time):close()
+end
+

tests/Lua.Tests/tests-lua/api.lua

@@ -0,0 +1,1009 @@
+
+if T==nil then
+  (Message or print)('\a\n >>> testC not active: skipping API tests <<<\n\a')
+  return
+end
+
+local debug = require "debug"
+
+local pack = table.pack
+
+
+function tcheck (t1, t2)
+  assert(t1.n == (t2.n or #t2) + 1)
+  for i = 2, t1.n do assert(t1[i] == t2[i - 1]) end
+end
+
+
+print('testing C API')
+
+a = T.testC("pushvalue R; return 1")
+assert(a == debug.getregistry())
+
+
+-- absindex
+assert(T.testC("settop 10; absindex -1; return 1") == 10)
+assert(T.testC("settop 5; absindex -5; return 1") == 1)
+assert(T.testC("settop 10; absindex 1; return 1") == 1)
+assert(T.testC("settop 10; absindex R; return 1") < -10)
+
+-- testing allignment
+a = T.d2s(12458954321123)
+assert(string.len(a) == 8)   -- sizeof(double)
+assert(T.s2d(a) == 12458954321123)
+
+a,b,c = T.testC("pushnum 1; pushnum 2; pushnum 3; return 2")
+assert(a == 2 and b == 3 and not c)
+
+f = T.makeCfunc("pushnum 1; pushnum 2; pushnum 3; return 2")
+a,b,c = f()
+assert(a == 2 and b == 3 and not c)
+
+-- test that all trues are equal
+a,b,c = T.testC("pushbool 1; pushbool 2; pushbool 0; return 3")
+assert(a == b and a == true and c == false)
+a,b,c = T.testC"pushbool 0; pushbool 10; pushnil;\
+                      tobool -3; tobool -3; tobool -3; return 3"
+assert(a==false and b==true and c==false)
+
+
+a,b,c = T.testC("gettop; return 2", 10, 20, 30, 40)
+assert(a == 40 and b == 5 and not c)
+
+t = pack(T.testC("settop 5; gettop; return .", 2, 3))
+tcheck(t, {n=4,2,3})
+
+t = pack(T.testC("settop 0; settop 15; return 10", 3, 1, 23))
+assert(t.n == 10 and t[1] == nil and t[10] == nil)
+
+t = pack(T.testC("remove -2; gettop; return .", 2, 3, 4))
+tcheck(t, {n=2,2,4})
+
+t = pack(T.testC("insert -1; gettop; return .", 2, 3))
+tcheck(t, {n=2,2,3})
+
+t = pack(T.testC("insert 3; gettop; return .", 2, 3, 4, 5))
+tcheck(t, {n=4,2,5,3,4})
+
+t = pack(T.testC("replace 2; gettop; return .", 2, 3, 4, 5))
+tcheck(t, {n=3,5,3,4})
+
+t = pack(T.testC("replace -2; gettop; return .", 2, 3, 4, 5))
+tcheck(t, {n=3,2,3,5})
+
+t = pack(T.testC("remove 3; gettop; return .", 2, 3, 4, 5))
+tcheck(t, {n=3,2,4,5})
+
+t = pack(T.testC("copy 3 4; gettop; return .", 2, 3, 4, 5))
+tcheck(t, {n=4,2,3,3,5})
+
+t = pack(T.testC("copy -3 -1; gettop; return .", 2, 3, 4, 5))
+tcheck(t, {n=4,2,3,4,3})
+
+
+
+
+t = pack(T.testC("insert 3; pushvalue 3; remove 3; pushvalue 2; remove 2; \
+                  insert 2; pushvalue 1; remove 1; insert 1; \
+      insert -2; pushvalue -2; remove -3; gettop; return .",
+      2, 3, 4, 5, 10, 40, 90))
+tcheck(t, {n=7,2,3,4,5,10,40,90})
+
+t = pack(T.testC("concat 5; gettop; return .", "alo", 2, 3, "joao", 12))
+tcheck(t, {n=1,"alo23joao12"})
+
+-- testing MULTRET
+t = pack(T.testC("call 2,-1; gettop; return .",
+     function (a,b) return 1,2,3,4,a,b end, "alo", "joao"))
+tcheck(t, {n=6,1,2,3,4,"alo", "joao"})
+
+do  -- test returning more results than fit in the caller stack
+  local a = {}
+  for i=1,1000 do a[i] = true end; a[999] = 10
+  local b = T.testC([[pcall 1 -1; pop 1; tostring -1; return 1]],
+                    table.unpack, a)
+  assert(b == "10")
+end
+
+
+-- testing globals
+_G.a = 14; _G.b = "a31"
+local a = {T.testC[[
+  getglobal a;
+  getglobal b;
+  getglobal b;
+  setglobal a;
+  gettop;
+  return .
+]]}
+assert(a[2] == 14 and a[3] == "a31" and a[4] == nil and _G.a == "a31")
+
+
+-- testing arith
+assert(T.testC("pushnum 10; pushnum 20; arith /; return 1") == 0.5)
+assert(T.testC("pushnum 10; pushnum 20; arith -; return 1") == -10)
+assert(T.testC("pushnum 10; pushnum -20; arith *; return 1") == -200)
+assert(T.testC("pushnum 10; pushnum 3; arith ^; return 1") == 1000)
+assert(T.testC("pushnum 10; pushstring 20; arith /; return 1") == 0.5)
+assert(T.testC("pushstring 10; pushnum 20; arith -; return 1") == -10)
+assert(T.testC("pushstring 10; pushstring -20; arith *; return 1") == -200)
+assert(T.testC("pushstring 10; pushstring 3; arith ^; return 1") == 1000)
+a,b,c = T.testC([[pushnum 1;
+                  pushstring 10; arith _;
+                  pushstring 5; return 3]])
+assert(a == 1 and b == -10 and c == "5")
+mt = {__add = function (a,b) return setmetatable({a[1] + b[1]}, mt) end,
+      __mod = function (a,b) return setmetatable({a[1] % b[1]}, mt) end,
+      __unm = function (a) return setmetatable({a[1]* 2}, mt) end}
+a,b,c = setmetatable({4}, mt),
+        setmetatable({8}, mt),
+        setmetatable({-3}, mt)
+x,y,z = T.testC("arith +; return 2", 10, a, b)
+assert(x == 10 and y[1] == 12 and z == nil)
+assert(T.testC("arith %; return 1", a, c)[1] == 4%-3)
+assert(T.testC("arith _; arith +; arith %; return 1", b, a, c)[1] ==
+               8 % (4 + (-3)*2))
+
+
+-- testing compare
+-- EQ = 0; LT = 1; LE = 2
+
+-- testing lessthan and lessequal
+assert(T.testC("compare 2 5 1, return 1", 3, 2, 2, 4, 2, 2))
+assert(T.testC("compare 2 5 2, return 1", 3, 2, 2, 4, 2, 2))
+assert(not T.testC("compare 3 4 1, return 1", 3, 2, 2, 4, 2, 2))
+assert(T.testC("compare 3 4 2, return 1", 3, 2, 2, 4, 2, 2))
+assert(T.testC("compare 5 2 1, return 1", 4, 2, 2, 3, 2, 2))
+assert(not T.testC("compare 2 -3 1, return 1", "4", "2", "2", "3", "2", "2"))
+assert(not T.testC("compare -3 2 1, return 1", "3", "2", "2", "4", "2", "2"))
+
+-- non-valid indices produce false
+assert(not T.testC("compare 1 4 1, return 1"))
+assert(not T.testC("compare 9 1 2, return 1"))
+assert(not T.testC("compare 9 9 0, return 1"))
+
+local b = {__lt = function (a,b) return a[1] < b[1] end}
+local a1,a3,a4 = setmetatable({1}, b),
+                 setmetatable({3}, b),
+                 setmetatable({4}, b)
+assert(T.testC("compare 2 5 1, return 1", a3, 2, 2, a4, 2, 2))
+assert(T.testC("compare 2 5 2, return 1", a3, 2, 2, a4, 2, 2))
+assert(T.testC("compare 5 -6 1, return 1", a4, 2, 2, a3, 2, 2))
+a,b = T.testC("compare 5 -6 1, return 2", a1, 2, 2, a3, 2, 20)
+assert(a == 20 and b == false)
+a,b = T.testC("compare 5 -6 2, return 2", a1, 2, 2, a3, 2, 20)
+assert(a == 20 and b == false)
+a,b = T.testC("compare 5 -6 2, return 2", a1, 2, 2, a1, 2, 20)
+assert(a == 20 and b == true)
+
+-- testing length
+local t = setmetatable({x = 20}, {__len = function (t) return t.x end})
+a,b,c = T.testC([[
+   len 2;
+   Llen 2;
+   objsize 2;
+   return 3
+]], t)
+assert(a == 20 and b == 20 and c == 0)
+
+t.x = "234"; t[1] = 20
+a,b,c = T.testC([[
+   len 2;
+   Llen 2;
+   objsize 2;
+   return 3
+]], t)
+assert(a == "234" and b == 234 and c == 1)
+
+t.x = print; t[1] = 20
+a,c = T.testC([[
+   len 2;
+   objsize 2;
+   return 2
+]], t)
+assert(a == print and c == 1)
+
+
+-- testing __concat
+
+a = setmetatable({x="u"}, {__concat = function (a,b) return a.x..'.'..b.x end})
+x,y = T.testC([[
+  pushnum 5
+  pushvalue 2;
+  pushvalue 2;
+  concat 2;
+  pushvalue -2;
+  return 2;
+]], a, a)
+assert(x == a..a and y == 5)
+
+-- concat with 0 elements
+assert(T.testC("concat 0; return 1") == "")
+
+-- concat with 1 element
+assert(T.testC("concat 1; return 1", "xuxu") == "xuxu")
+
+
+
+-- testing lua_is
+
+function B(x) return x and 1 or 0 end
+
+function count (x, n)
+  n = n or 2
+  local prog = [[
+    isnumber %d;
+    isstring %d;
+    isfunction %d;
+    iscfunction %d;
+    istable %d;
+    isuserdata %d;
+    isnil %d;
+    isnull %d;
+    return 8
+  ]]
+  prog = string.format(prog, n, n, n, n, n, n, n, n)
+  local a,b,c,d,e,f,g,h = T.testC(prog, x)
+  return B(a)+B(b)+B(c)+B(d)+B(e)+B(f)+B(g)+(100*B(h))
+end
+
+assert(count(3) == 2)
+assert(count('alo') == 1)
+assert(count('32') == 2)
+assert(count({}) == 1)
+assert(count(print) == 2)
+assert(count(function () end) == 1)
+assert(count(nil) == 1)
+assert(count(io.stdin) == 1)
+assert(count(nil, 15) == 100)
+
+
+-- testing lua_to...
+
+function to (s, x, n)
+  n = n or 2
+  return T.testC(string.format("%s %d; return 1", s, n), x)
+end
+
+assert(to("tostring", {}) == nil)
+assert(to("tostring", "alo") == "alo")
+assert(to("tostring", 12) == "12")
+assert(to("tostring", 12, 3) == nil)
+assert(to("objsize", {}) == 0)
+assert(to("objsize", {1,2,3}) == 3)
+assert(to("objsize", "alo\0\0a") == 6)
+assert(to("objsize", T.newuserdata(0)) == 0)
+assert(to("objsize", T.newuserdata(101)) == 101)
+assert(to("objsize", 124) == 0)
+assert(to("objsize", true) == 0)
+assert(to("tonumber", {}) == 0)
+assert(to("tonumber", "12") == 12)
+assert(to("tonumber", "s2") == 0)
+assert(to("tonumber", 1, 20) == 0)
+assert(to("topointer", 10) == 0)
+assert(to("topointer", true) == 0)
+assert(to("topointer", T.pushuserdata(20)) == 20)
+assert(to("topointer", io.read) ~= 0)
+assert(to("func2num", 20) == 0)
+assert(to("func2num", T.pushuserdata(10)) == 0)
+assert(to("func2num", io.read) ~= 0)
+a = to("tocfunction", math.deg)
+assert(a(3) == math.deg(3) and a == math.deg)
+
+
+
+-- testing deep C stack
+do
+  collectgarbage("stop")
+  local s, msg = pcall(T.testC, "checkstack 1000023 XXXX")   -- too deep
+  assert(not s and string.find(msg, "XXXX"))
+  s = string.rep("pushnil;checkstack 1 XX;", 1000000)
+  s, msg = pcall(T.testC, s)
+  assert(not s and string.find(msg, "XX"))
+  collectgarbage("restart")
+end
+
+local prog = {"checkstack 30000 msg", "newtable"}
+for i = 1,12000 do
+  prog[#prog + 1] = "pushnum " .. i
+  prog[#prog + 1] = "pushnum " .. i * 10
+end
+
+prog[#prog + 1] = "rawgeti R 2"   -- get global table in registry
+prog[#prog + 1] = "insert " .. -(2*12000 + 2)
+
+for i = 1,12000 do
+  prog[#prog + 1] = "settable " .. -(2*(12000 - i + 1) + 1)
+end
+
+prog[#prog + 1] = "return 2"
+
+prog = table.concat(prog, ";")
+local g, t = T.testC(prog)
+assert(g == _G)
+for i = 1,12000 do assert(t[i] == i*10); t[i] = nil end
+assert(next(t) == nil)
+prog, g, t = nil
+
+-- testing errors
+
+a = T.testC([[
+  loadstring 2; pcall 0,1;
+  pushvalue 3; insert -2; pcall 1, 1;
+  pcall 0, 0;
+  return 1
+]], "x=150", function (a) assert(a==nil); return 3 end)
+
+assert(type(a) == 'string' and x == 150)
+
+function check3(p, ...)
+  local arg = {...}
+  assert(#arg == 3)
+  assert(string.find(arg[3], p))
+end
+check3(":1:", T.testC("loadstring 2; gettop; return .", "x="))
+check3("cannot read", T.testC("loadfile 2; gettop; return .", "."))
+check3("cannot open xxxx", T.testC("loadfile 2; gettop; return .", "xxxx"))
+
+-- test errors in non protected threads
+function checkerrnopro (code, msg)
+  L = coroutine.create(function () end)
+  local stt, err = pcall(T.testC, code)
+  assert(not stt and string.find(err, msg))
+end
+
+checkerrnopro("pushnum 3; call 0 0", "attempt to call")
+function f () f() end
+checkerrnopro("getglobal 'f'; call 0 0;", "stack overflow")
+
+
+-- testing table access
+
+a = {x=0, y=12}
+x, y = T.testC("gettable 2; pushvalue 4; gettable 2; return 2",
+                a, 3, "y", 4, "x")
+assert(x == 0 and y == 12)
+T.testC("settable -5", a, 3, 4, "x", 15)
+assert(a.x == 15)
+a[a] = print
+x = T.testC("gettable 2; return 1", a)  -- table and key are the same object!
+assert(x == print)
+T.testC("settable 2", a, "x")    -- table and key are the same object!
+assert(a[a] == "x")
+
+b = setmetatable({p = a}, {})
+getmetatable(b).__index = function (t, i) return t.p[i] end
+k, x = T.testC("gettable 3, return 2", 4, b, 20, 35, "x")
+assert(x == 15 and k == 35)
+getmetatable(b).__index = function (t, i) return a[i] end
+getmetatable(b).__newindex = function (t, i,v ) a[i] = v end
+y = T.testC("insert 2; gettable -5; return 1", 2, 3, 4, "y", b)
+assert(y == 12)
+k = T.testC("settable -5, return 1", b, 3, 4, "x", 16)
+assert(a.x == 16 and k == 4)
+a[b] = 'xuxu'
+y = T.testC("gettable 2, return 1", b)
+assert(y == 'xuxu')
+T.testC("settable 2", b, 19)
+assert(a[b] == 19)
+
+-- testing next
+a = {}
+t = pack(T.testC("next; gettop; return .", a, nil))
+tcheck(t, {n=1,a})
+a = {a=3}
+t = pack(T.testC("next; gettop; return .", a, nil))
+tcheck(t, {n=3,a,'a',3})
+t = pack(T.testC("next; pop 1; next; gettop; return .", a, nil))
+tcheck(t, {n=1,a})
+
+
+
+-- testing upvalues
+
+do
+  local A = T.testC[[ pushnum 10; pushnum 20; pushcclosure 2; return 1]]
+  t, b, c = A([[pushvalue U0; pushvalue U1; pushvalue U2; return 3]])
+  assert(b == 10 and c == 20 and type(t) == 'table')
+  a, b = A([[tostring U3; tonumber U4; return 2]])
+  assert(a == nil and b == 0)
+  A([[pushnum 100; pushnum 200; replace U2; replace U1]])
+  b, c = A([[pushvalue U1; pushvalue U2; return 2]])
+  assert(b == 100 and c == 200)
+  A([[replace U2; replace U1]], {x=1}, {x=2})
+  b, c = A([[pushvalue U1; pushvalue U2; return 2]])
+  assert(b.x == 1 and c.x == 2)
+  T.checkmemory()
+end
+
+
+-- testing absent upvalues from C-function pointers
+assert(T.testC[[isnull U1; return 1]] == true)
+assert(T.testC[[isnull U100; return 1]] == true)
+assert(T.testC[[pushvalue U1; return 1]] == nil)
+
+local f = T.testC[[ pushnum 10; pushnum 20; pushcclosure 2; return 1]]
+assert(T.upvalue(f, 1) == 10 and
+       T.upvalue(f, 2) == 20 and
+       T.upvalue(f, 3) == nil)
+T.upvalue(f, 2, "xuxu")
+assert(T.upvalue(f, 2) == "xuxu")
+
+
+-- large closures
+do
+  local A = "checkstack 300 msg;" ..
+            string.rep("pushnum 10;", 255) ..
+            "pushcclosure 255; return 1"
+  A = T.testC(A)
+  for i=1,255 do
+    assert(A(("pushvalue U%d; return 1"):format(i)) == 10)
+  end
+  assert(A("isnull U256; return 1"))
+  assert(not A("isnil U256; return 1"))
+end
+  
+
+
+-- bug in 5.1.2
+assert(not pcall(debug.setuservalue, 3, {}))
+assert(not pcall(debug.setuservalue, nil, {}))
+assert(not pcall(debug.setuservalue, T.pushuserdata(1), {}))
+
+local b = T.newuserdata(0)
+local a = {}
+assert(debug.getuservalue(b) == nil)
+assert(debug.setuservalue(b, a))
+assert(debug.getuservalue(b) == a)
+assert(debug.setuservalue(b, nil))
+assert(debug.getuservalue(b) == nil)
+
+assert(debug.getuservalue(4) == nil)
+
+
+
+-- testing locks (refs)
+
+-- reuse of references
+local i = T.ref{}
+T.unref(i)
+assert(T.ref{} == i)
+
+Arr = {}
+Lim = 100
+for i=1,Lim do   -- lock many objects
+  Arr[i] = T.ref({})
+end
+
+assert(T.ref(nil) == -1 and T.getref(-1) == nil)
+T.unref(-1); T.unref(-1)
+
+for i=1,Lim do   -- unlock all them
+  T.unref(Arr[i])
+end
+
+function printlocks ()
+  local f = T.makeCfunc("gettable R; return 1")
+  local n = f("n")
+  print("n", n)
+  for i=0,n do
+    print(i, f(i))
+  end
+end
+
+
+for i=1,Lim do   -- lock many objects
+  Arr[i] = T.ref({})
+end
+
+for i=1,Lim,2 do   -- unlock half of them
+  T.unref(Arr[i])
+end
+
+assert(type(T.getref(Arr[2])) == 'table')
+
+
+assert(T.getref(-1) == nil)
+
+
+a = T.ref({})
+
+collectgarbage()
+
+assert(type(T.getref(a)) == 'table')
+
+
+-- colect in cl the `val' of all collected userdata
+tt = {}
+cl = {n=0}
+A = nil; B = nil
+local F
+F = function (x)
+  local udval = T.udataval(x)
+  table.insert(cl, udval)
+  local d = T.newuserdata(100)   -- cria lixo
+  d = nil
+  assert(debug.getmetatable(x).__gc == F)
+  assert(load("table.insert({}, {})"))()   -- cria mais lixo
+  collectgarbage()   -- forca coleta de lixo durante coleta!
+  assert(debug.getmetatable(x).__gc == F)   -- coleta anterior nao melou isso?
+  local dummy = {}    -- cria lixo durante coleta
+  if A ~= nil then
+    assert(type(A) == "userdata")
+    assert(T.udataval(A) == B)
+    debug.getmetatable(A)    -- just acess it
+  end
+  A = x   -- ressucita userdata
+  B = udval
+  return 1,2,3
+end
+tt.__gc = F
+
+-- test whether udate collection frees memory in the right time
+do
+  collectgarbage();
+  collectgarbage();
+  local x = collectgarbage("count");
+  local a = T.newuserdata(5001)
+  assert(T.testC("objsize 2; return 1", a) == 5001)
+  assert(collectgarbage("count") >= x+4) 
+  a = nil
+  collectgarbage();
+  assert(collectgarbage("count") <= x+1)
+  -- udata without finalizer
+  x = collectgarbage("count")
+  collectgarbage("stop")
+  for i=1,1000 do T.newuserdata(0) end
+  assert(collectgarbage("count") > x+10)
+  collectgarbage()
+  assert(collectgarbage("count") <= x+1)
+  -- udata with finalizer
+  x = collectgarbage("count")
+  collectgarbage()
+  collectgarbage("stop")
+  a = {__gc = function () end}
+  for i=1,1000 do debug.setmetatable(T.newuserdata(0), a) end
+  assert(collectgarbage("count") >= x+10)
+  collectgarbage()  -- this collection only calls TM, without freeing memory
+  assert(collectgarbage("count") >= x+10)
+  collectgarbage()  -- now frees memory
+  assert(collectgarbage("count") <= x+1)
+  collectgarbage("restart")
+end
+
+
+collectgarbage("stop")
+
+-- create 3 userdatas with tag `tt'
+a = T.newuserdata(0); debug.setmetatable(a, tt); na = T.udataval(a)
+b = T.newuserdata(0); debug.setmetatable(b, tt); nb = T.udataval(b)
+c = T.newuserdata(0); debug.setmetatable(c, tt); nc = T.udataval(c)
+
+-- create userdata without meta table
+x = T.newuserdata(4)
+y = T.newuserdata(0)
+
+assert(not pcall(io.input, a))
+assert(not pcall(io.input, x))
+
+assert(debug.getmetatable(x) == nil and debug.getmetatable(y) == nil)
+
+d=T.ref(a);
+e=T.ref(b);
+f=T.ref(c);
+t = {T.getref(d), T.getref(e), T.getref(f)}
+assert(t[1] == a and t[2] == b and t[3] == c)
+
+t=nil; a=nil; c=nil;
+T.unref(e); T.unref(f)
+
+collectgarbage()
+
+-- check that unref objects have been collected
+assert(#cl == 1 and cl[1] == nc)
+
+x = T.getref(d)
+assert(type(x) == 'userdata' and debug.getmetatable(x) == tt)
+x =nil
+tt.b = b  -- create cycle
+tt=nil    -- frees tt for GC
+A = nil
+b = nil
+T.unref(d);
+n5 = T.newuserdata(0)
+debug.setmetatable(n5, {__gc=F})
+n5 = T.udataval(n5)
+collectgarbage()
+assert(#cl == 4)
+-- check order of collection
+assert(cl[2] == n5 and cl[3] == nb and cl[4] == na)
+
+collectgarbage"restart"
+
+
+a, na = {}, {}
+for i=30,1,-1 do
+  a[i] = T.newuserdata(0)
+  debug.setmetatable(a[i], {__gc=F})
+  na[i] = T.udataval(a[i])
+end
+cl = {}
+a = nil; collectgarbage()
+assert(#cl == 30)
+for i=1,30 do assert(cl[i] == na[i]) end
+na = nil
+
+
+for i=2,Lim,2 do   -- unlock the other half
+  T.unref(Arr[i])
+end
+
+x = T.newuserdata(41); debug.setmetatable(x, {__gc=F})
+assert(T.testC("objsize 2; return 1", x) == 41)
+cl = {}
+a = {[x] = 1}
+x = T.udataval(x)
+collectgarbage()
+-- old `x' cannot be collected (`a' still uses it)
+assert(#cl == 0)
+for n in pairs(a) do a[n] = nil end
+collectgarbage()
+assert(#cl == 1 and cl[1] == x)   -- old `x' must be collected
+
+-- testing lua_equal
+assert(T.testC("compare 2 4 0; return 1", print, 1, print, 20))
+assert(T.testC("compare 3 2 0; return 1", 'alo', "alo"))
+assert(T.testC("compare 2 3 0; return 1", nil, nil))
+assert(not T.testC("compare 2 3 0; return 1", {}, {}))
+assert(not T.testC("compare 2 3 0; return 1"))
+assert(not T.testC("compare 2 3 0; return 1", 3))
+
+-- testing lua_equal with fallbacks
+do
+  local map = {}
+  local t = {__eq = function (a,b) return map[a] == map[b] end}
+  local function f(x)
+    local u = T.newuserdata(0)
+    debug.setmetatable(u, t)
+    map[u] = x
+    return u
+  end
+  assert(f(10) == f(10))
+  assert(f(10) ~= f(11))
+  assert(T.testC("compare 2 3 0; return 1", f(10), f(10)))
+  assert(not T.testC("compare 2 3 0; return 1", f(10), f(20)))
+  t.__eq = nil
+  assert(f(10) ~= f(10))
+end
+
+print'+'
+
+
+
+-- testing changing hooks during hooks
+_G.t = {}
+T.sethook([[
+  # set a line hook after 3 count hooks
+  sethook 4 0 '
+    getglobal t;
+    pushvalue -3; append -2
+    pushvalue -2; append -2
+  ']], "c", 3)
+local a = 1   -- counting
+a = 1   -- counting
+a = 1   -- count hook (set line hook)
+a = 1   -- line hook
+a = 1   -- line hook
+debug.sethook()
+t = _G.t
+assert(t[1] == "line")
+line = t[2]
+assert(t[3] == "line" and t[4] == line + 1)
+assert(t[5] == "line" and t[6] == line + 2)
+assert(t[7] == nil)
+
+
+-------------------------------------------------------------------------
+do   -- testing errors during GC
+  local a = {}
+  for i=1,20 do
+    a[i] = T.newuserdata(i)   -- creates several udata
+  end
+  for i=1,20,2 do   -- mark half of them to raise errors during GC
+    debug.setmetatable(a[i], {__gc = function (x) error("error inside gc") end})
+  end
+  for i=2,20,2 do   -- mark the other half to count and to create more garbage
+    debug.setmetatable(a[i], {__gc = function (x) load("A=A+1")() end})
+  end
+  _G.A = 0
+  a = 0
+  while 1 do
+    local stat, msg = pcall(collectgarbage)
+    if stat then
+      break   -- stop when no more errors
+    else
+      a = a + 1
+      assert(string.find(msg, "__gc"))
+    end
+  end
+  assert(a == 10)  -- number of errors
+
+  assert(A == 10)  -- number of normal collections
+end
+-------------------------------------------------------------------------
+-- test for userdata vals
+do
+  local a = {}; local lim = 30
+  for i=0,lim do a[i] = T.pushuserdata(i) end
+  for i=0,lim do assert(T.udataval(a[i]) == i) end
+  for i=0,lim do assert(T.pushuserdata(i) == a[i]) end
+  for i=0,lim do a[a[i]] = i end
+  for i=0,lim do a[T.pushuserdata(i)] = i end
+  assert(type(tostring(a[1])) == "string")
+end
+
+
+-------------------------------------------------------------------------
+-- testing multiple states
+T.closestate(T.newstate());
+L1 = T.newstate()
+assert(L1)
+
+assert(T.doremote(L1, "X='a'; return 'a'") == 'a')
+
+
+assert(#pack(T.doremote(L1, "function f () return 'alo', 3 end; f()")) == 0)
+
+a, b = T.doremote(L1, "return f()")
+assert(a == 'alo' and b == '3')
+
+T.doremote(L1, "_ERRORMESSAGE = nil")
+-- error: `sin' is not defined
+a, _, b = T.doremote(L1, "return sin(1)")
+assert(a == nil and b == 2)   -- 2 == run-time error
+
+-- error: syntax error
+a, b, c = T.doremote(L1, "return a+")
+assert(a == nil and c == 3 and type(b) == "string")   -- 3 == syntax error
+
+T.loadlib(L1)
+a, b, c = T.doremote(L1, [[
+  string = require'string'
+  a = require'_G'; assert(a == _G and require("_G") == a)
+  io = require'io'; assert(type(io.read) == "function")
+  assert(require("io") == io)
+  a = require'table'; assert(type(a.insert) == "function")
+  a = require'debug'; assert(type(a.getlocal) == "function")
+  a = require'math'; assert(type(a.sin) == "function")
+  return string.sub('okinama', 1, 2)
+]])
+assert(a == "ok")
+
+T.closestate(L1);
+
+
+L1 = T.newstate()
+T.loadlib(L1)
+T.doremote(L1, "a = {}")
+T.testC(L1, [[getglobal "a"; pushstring "x"; pushnum 1;
+             settable -3]])
+assert(T.doremote(L1, "return a.x") == "1")
+
+T.closestate(L1)
+
+L1 = nil
+
+print('+')
+
+-------------------------------------------------------------------------
+-- testing memory limits
+-------------------------------------------------------------------------
+assert(not pcall(T.newuserdata, 2^32-4))
+collectgarbage()
+T.totalmem(T.totalmem()+5000)   -- set low memory limit (+5k)
+assert(not pcall(load"local a={}; for i=1,100000 do a[i]=i end"))
+T.totalmem(1000000000)          -- restore high limit
+
+-- test memory errors; increase memory limit in small steps, so that
+-- we get memory errors in different parts of a given task, up to there
+-- is enough memory to complete the task without errors
+function testamem (s, f)
+  collectgarbage(); collectgarbage()
+  local M = T.totalmem()
+  local oldM = M
+  local a,b = nil
+  while 1 do
+    M = M+7   -- increase memory limit in small steps
+    T.totalmem(M)
+    a, b = pcall(f)
+    T.totalmem(1000000000)  -- restore high limit
+    if a and b then break end       -- stop when no more errors
+    collectgarbage()
+    if not a and not    -- `real' error?
+      (string.find(b, "memory") or string.find(b, "overflow")) then
+      error(b, 0)   -- propagate it
+    end
+  end
+  print("\nlimit for " .. s .. ": " .. M-oldM)
+  return b
+end
+
+
+-- testing memory errors when creating a new state
+
+b = testamem("state creation", T.newstate)
+T.closestate(b);  -- close new state
+
+
+-- testing threads
+
+-- get main thread from registry (at index LUA_RIDX_MAINTHREAD == 1)
+mt = T.testC("rawgeti R 1; return 1")
+assert(type(mt) == "thread" and coroutine.running() == mt)
+
+
+
+function expand (n,s)
+  if n==0 then return "" end
+  local e = string.rep("=", n)
+  return string.format("T.doonnewstack([%s[ %s;\n collectgarbage(); %s]%s])\n",
+                              e, s, expand(n-1,s), e)
+end
+
+G=0; collectgarbage(); a =collectgarbage("count")
+load(expand(20,"G=G+1"))()
+assert(G==20); collectgarbage();  -- assert(gcinfo() <= a+1)
+
+testamem("thread creation", function ()
+  return T.doonnewstack("x=1") == 0  -- try to create thread
+end)
+
+
+-- testing memory x compiler
+
+testamem("loadstring", function ()
+  return load("x=1")  -- try to do load a string
+end)
+
+
+local testprog = [[
+local function foo () return end
+local t = {"x"}
+a = "aaa"
+for i = 1, #t do a=a..t[i] end
+return true
+]]
+
+-- testing memory x dofile
+_G.a = nil
+local t =os.tmpname()
+local f = assert(io.open(t, "w"))
+f:write(testprog)
+f:close()
+testamem("dofile", function ()
+  local a = loadfile(t)
+  return a and a()
+end)
+assert(os.remove(t))
+assert(_G.a == "aaax")
+
+
+-- other generic tests
+
+testamem("string creation", function ()
+  local a, b = string.gsub("alo alo", "(a)", function (x) return x..'b' end)
+  return (a == 'ablo ablo')
+end)
+
+testamem("dump/undump", function ()
+  local a = load(testprog)
+  local b = a and string.dump(a)
+  a = b and load(b)
+  return a and a()
+end)
+
+local t = os.tmpname()
+testamem("file creation", function ()
+  local f = assert(io.open(t, 'w'))
+  assert (not io.open"nomenaoexistente")
+  io.close(f);
+  return not loadfile'nomenaoexistente'
+end)
+assert(os.remove(t))
+
+testamem("table creation", function ()
+  local a, lim = {}, 10
+  for i=1,lim do a[i] = i; a[i..'a'] = {} end
+  return (type(a[lim..'a']) == 'table' and a[lim] == lim)
+end)
+
+testamem("constructors", function ()
+  local a = {10, 20, 30, 40, 50; a=1, b=2, c=3, d=4, e=5}
+  return (type(a) == 'table' and a.e == 5)
+end)
+
+local a = 1
+close = nil
+testamem("closure creation", function ()
+  function close (b,c)
+   return function (x) return a+b+c+x end
+  end
+  return (close(2,3)(4) == 10)
+end)
+
+testamem("coroutines", function ()
+  local a = coroutine.wrap(function ()
+              coroutine.yield(string.rep("a", 10))
+              return {}
+            end)
+  assert(string.len(a()) == 10)
+  return a()
+end)
+
+print'+'
+
+-- testing some auxlib functions
+local function gsub (a, b, c)
+  a, b = T.testC("gsub 2 3 4; gettop; return 2", a, b, c)
+  assert(b == 5)
+  return a
+end
+
+assert(gsub("alo.alo.uhuh.", ".", "//") == "alo//alo//uhuh//")
+assert(gsub("alo.alo.uhuh.", "alo", "//") == "//.//.uhuh.")
+assert(gsub("", "alo", "//") == "")
+assert(gsub("...", ".", "/.") == "/././.")
+assert(gsub("...", "...", "") == "")
+
+
+-- testing luaL_newmetatable
+local mt_xuxu, res, top = T.testC("newmetatable xuxu; gettop; return 3")
+assert(type(mt_xuxu) == "table" and res and top == 3)
+local d, res, top = T.testC("newmetatable xuxu; gettop; return 3")
+assert(mt_xuxu == d and not res and top == 3)
+d, res, top = T.testC("newmetatable xuxu1; gettop; return 3")
+assert(mt_xuxu ~= d and res and top == 3)
+
+x = T.newuserdata(0);
+y = T.newuserdata(0);
+T.testC("pushstring xuxu; gettable R; setmetatable 2", x)
+assert(getmetatable(x) == mt_xuxu)
+
+-- testing luaL_testudata
+-- correct metatable
+local res1, res2, top = T.testC([[testudata -1 xuxu
+   	 			  testudata 2 xuxu
+				  gettop
+				  return 3]], x)
+assert(res1 and res2 and top == 4)
+
+-- wrong metatable
+res1, res2, top = T.testC([[testudata -1 xuxu1
+			    testudata 2 xuxu1
+			    gettop
+			    return 3]], x)
+assert(not res1 and not res2 and top == 4)
+
+-- non-existent type
+res1, res2, top = T.testC([[testudata -1 xuxu2
+			    testudata 2 xuxu2
+			    gettop
+			    return 3]], x)
+assert(not res1 and not res2 and top == 4)
+
+-- userdata has no metatable
+res1, res2, top = T.testC([[testudata -1 xuxu
+			    testudata 2 xuxu
+			    gettop
+			    return 3]], y)
+assert(not res1 and not res2 and top == 4)
+
+-- erase metatables
+do
+  local r = debug.getregistry()
+  assert(r.xuxu == mt_xuxu and r.xuxu1 == d)
+  r.xuxu = nil; r.xuxu1 = nil
+end
+
+print'OK'
+

tests/Lua.Tests/tests-lua/attrib.lua

@@ -0,0 +1,421 @@
+-- The tests for 'require' assume some specific directories and libraries;
+-- better to avoid them in generic machines
+
+if not _port then --[
+
+print "testing require"
+
+assert(require"string" == string)
+assert(require"math" == math)
+assert(require"table" == table)
+assert(require"io" == io)
+assert(require"os" == os)
+assert(require"coroutine" == coroutine)
+
+assert(type(package.path) == "string")
+assert(type(package.cpath) == "string")
+assert(type(package.loaded) == "table")
+assert(type(package.preload) == "table")
+
+assert(type(package.config) == "string")
+print("package config: "..string.gsub(package.config, "\n", "|"))
+
+do
+  -- create a path with 'max' templates,
+  -- each with 1-10 repetitions of '?'
+  local max = 2000
+  local t = {}
+  for i = 1,max do t[i] = string.rep("?", i%10 + 1) end
+  t[#t + 1] = ";"    -- empty template
+  local path = table.concat(t, ";")
+  -- use that path in a search
+  local s, err = package.searchpath("xuxu", path)
+  -- search fails; check that message has an occurence of
+  -- '??????????' with ? replaced by xuxu and at least 'max' lines
+  assert(not s and
+         string.find(err, string.rep("xuxu", 10)) and
+         #string.gsub(err, "[^\n]", "") >= max)
+  -- path with one very long template
+  local path = string.rep("?", max)
+  local s, err = package.searchpath("xuxu", path)
+  assert(not s and string.find(err, string.rep('xuxu', max)))
+end
+
+do
+  local oldpath = package.path
+  package.path = {}
+  local s, err = pcall(require, "no-such-file")
+  assert(not s and string.find(err, "package.path"))
+  package.path = oldpath
+end
+
+print('+')
+
+-- auxiliary directory with C modules and temporary files
+local DIR = "libs/"
+
+-- prepend DIR to a name
+local function D (x) return DIR .. x end
+
+
+local function createfiles (files, preextras, posextras)
+  for n,c in pairs(files) do
+    io.output(D(n))
+    io.write(string.format(preextras, n))
+    io.write(c)
+    io.write(string.format(posextras, n))
+    io.close(io.output())
+  end
+end
+
+function removefiles (files)
+  for n in pairs(files) do
+    os.remove(D(n))
+  end
+end
+
+local files = {
+  ["names.lua"] = "do return {...} end\n",
+  ["err.lua"] = "B = 15; a = a + 1;",
+  ["A.lua"] = "",
+  ["B.lua"] = "assert(...=='B');require 'A'",
+  ["A.lc"] = "",
+  ["A"] = "",
+  ["L"] = "",
+  ["XXxX"] = "",
+  ["C.lua"] = "package.loaded[...] = 25; require'C'"
+}
+
+AA = nil
+local extras = [[
+NAME = '%s'
+REQUIRED = ...
+return AA]]
+
+createfiles(files, "", extras)
+
+-- testing explicit "dir" separator in 'searchpath'
+assert(package.searchpath("C.lua", D"?", "", "") == D"C.lua")
+assert(package.searchpath("C.lua", D"?", ".", ".") == D"C.lua")
+assert(package.searchpath("--x-", D"?", "-", "X") == D"XXxX")
+assert(package.searchpath("---xX", D"?", "---", "XX") == D"XXxX")
+assert(package.searchpath(D"C.lua", "?", "/") == D"C.lua")
+assert(package.searchpath(".\\C.lua", D"?", "\\") == D"./C.lua")
+
+local oldpath = package.path
+
+package.path = string.gsub("D/?.lua;D/?.lc;D/?;D/??x?;D/L", "D/", DIR)
+
+local try = function (p, n, r)
+  NAME = nil
+  local rr = require(p)
+  assert(NAME == n)
+  assert(REQUIRED == p)
+  assert(rr == r)
+end
+
+a = require"names"
+assert(a[1] == "names" and a[2] == D"names.lua")
+
+_G.a = nil
+assert(not pcall(require, "err"))
+assert(B == 15)
+
+assert(package.searchpath("C", package.path) == D"C.lua")
+assert(require"C" == 25)
+assert(require"C" == 25)
+AA = nil
+try('B', 'B.lua', true)
+assert(package.loaded.B)
+assert(require"B" == true)
+assert(package.loaded.A)
+assert(require"C" == 25)
+package.loaded.A = nil
+try('B', nil, true)   -- should not reload package
+try('A', 'A.lua', true)
+package.loaded.A = nil
+os.remove(D'A.lua')
+AA = {}
+try('A', 'A.lc', AA)  -- now must find second option
+assert(package.searchpath("A", package.path) == D"A.lc")
+assert(require("A") == AA)
+AA = false
+try('K', 'L', false)     -- default option
+try('K', 'L', false)     -- default option (should reload it)
+assert(rawget(_G, "_REQUIREDNAME") == nil)
+
+AA = "x"
+try("X", "XXxX", AA)
+
+
+removefiles(files)
+
+
+-- testing require of sub-packages
+
+local _G = _G
+
+package.path = string.gsub("D/?.lua;D/?/init.lua", "D/", DIR)
+
+files = {
+  ["P1/init.lua"] = "AA = 10",
+  ["P1/xuxu.lua"] = "AA = 20",
+}
+
+createfiles(files, "_ENV = {}\n", "\nreturn _ENV\n")
+AA = 0
+
+local m = assert(require"P1")
+assert(AA == 0 and m.AA == 10)
+assert(require"P1" == m)
+assert(require"P1" == m)
+
+assert(package.searchpath("P1.xuxu", package.path) == D"P1/xuxu.lua")
+m.xuxu = assert(require"P1.xuxu")
+assert(AA == 0 and m.xuxu.AA == 20)
+assert(require"P1.xuxu" == m.xuxu)
+assert(require"P1.xuxu" == m.xuxu)
+assert(require"P1" == m and m.AA == 10)
+
+
+removefiles(files)
+
+
+package.path = ""
+assert(not pcall(require, "file_does_not_exist"))
+package.path = "??\0?"
+assert(not pcall(require, "file_does_not_exist1"))
+
+package.path = oldpath
+
+-- check 'require' error message
+local fname = "file_does_not_exist2"
+local m, err = pcall(require, fname)
+for t in string.gmatch(package.path..";"..package.cpath, "[^;]+") do
+  t = string.gsub(t, "?", fname)
+  assert(string.find(err, t, 1, true))
+end
+
+
+local function import(...)
+  local f = {...}
+  return function (m)
+    for i=1, #f do m[f[i]] = _G[f[i]] end
+  end
+end
+
+-- cannot change environment of a C function
+assert(not pcall(module, 'XUXU'))
+
+
+
+-- testing require of C libraries
+
+
+local p = ""   -- On Mac OS X, redefine this to "_"
+
+-- check whether loadlib works in this system
+local st, err, when = package.loadlib(D"lib1.so", "*")
+if not st then
+  local f, err, when = package.loadlib("donotexist", p.."xuxu")
+  assert(not f and type(err) == "string" and when == "absent")
+  ;(Message or print)('\a\n >>> cannot load dynamic library <<<\n\a')
+  print(err, when)
+else
+  -- tests for loadlib
+  local f = assert(package.loadlib(D"lib1.so", p.."onefunction"))
+  local a, b = f(15, 25)
+  assert(a == 25 and b == 15)
+
+  f = assert(package.loadlib(D"lib1.so", p.."anotherfunc"))
+  assert(f(10, 20) == "1020\n")
+
+  -- check error messages
+  local f, err, when = package.loadlib(D"lib1.so", p.."xuxu")
+  assert(not f and type(err) == "string" and when == "init")
+  f, err, when = package.loadlib("donotexist", p.."xuxu")
+  assert(not f and type(err) == "string" and when == "open")
+
+  -- symbols from 'lib1' must be visible to other libraries
+  f = assert(package.loadlib(D"lib11.so", p.."luaopen_lib11"))
+  assert(f() == "exported")
+
+  -- test C modules with prefixes in names
+  package.cpath = D"?.so"
+  local lib2 = require"v-lib2"
+  -- check correct access to global environment and correct
+  -- parameters
+  assert(_ENV.x == "v-lib2" and _ENV.y == D"v-lib2.so")
+  assert(lib2.id("x") == "x")
+
+  -- test C submodules
+  local fs = require"lib1.sub"
+  assert(_ENV.x == "lib1.sub" and _ENV.y == D"lib1.so")
+  assert(fs.id(45) == 45)
+end
+
+_ENV = _G
+
+
+-- testing preload
+
+do
+  local p = package
+  package = {}
+  p.preload.pl = function (...)
+    local _ENV = {...}
+    function xuxu (x) return x+20 end
+    return _ENV
+  end
+
+  local pl = require"pl"
+  assert(require"pl" == pl)
+  assert(pl.xuxu(10) == 30)
+  assert(pl[1] == "pl" and pl[2] == nil)
+
+  package = p
+  assert(type(package.path) == "string")
+end
+
+print('+')
+
+end  --]
+
+print("testing assignments, logical operators, and constructors")
+
+local res, res2 = 27
+
+a, b = 1, 2+3
+assert(a==1 and b==5)
+a={}
+function f() return 10, 11, 12 end
+a.x, b, a[1] = 1, 2, f()
+assert(a.x==1 and b==2 and a[1]==10)
+a[f()], b, a[f()+3] = f(), a, 'x'
+assert(a[10] == 10 and b == a and a[13] == 'x')
+
+do
+  local f = function (n) local x = {}; for i=1,n do x[i]=i end;
+                         return table.unpack(x) end;
+  local a,b,c
+  a,b = 0, f(1)
+  assert(a == 0 and b == 1)
+  A,b = 0, f(1)
+  assert(A == 0 and b == 1)
+  a,b,c = 0,5,f(4)
+  assert(a==0 and b==5 and c==1)
+  a,b,c = 0,5,f(0)
+  assert(a==0 and b==5 and c==nil)
+end
+
+a, b, c, d = 1 and nil, 1 or nil, (1 and (nil or 1)), 6
+assert(not a and b and c and d==6)
+
+d = 20
+a, b, c, d = f()
+assert(a==10 and b==11 and c==12 and d==nil)
+a,b = f(), 1, 2, 3, f()
+assert(a==10 and b==1)
+
+assert(a<b == false and a>b == true)
+assert((10 and 2) == 2)
+assert((10 or 2) == 10)
+assert((10 or assert(nil)) == 10)
+assert(not (nil and assert(nil)))
+assert((nil or "alo") == "alo")
+assert((nil and 10) == nil)
+assert((false and 10) == false)
+assert((true or 10) == true)
+assert((false or 10) == 10)
+assert(false ~= nil)
+assert(nil ~= false)
+assert(not nil == true)
+assert(not not nil == false)
+assert(not not 1 == true)
+assert(not not a == true)
+assert(not not (6 or nil) == true)
+assert(not not (nil and 56) == false)
+assert(not not (nil and true) == false)
+
+assert({} ~= {})
+print('+')
+
+a = {}
+a[true] = 20
+a[false] = 10
+assert(a[1<2] == 20 and a[1>2] == 10)
+
+function f(a) return a end
+
+local a = {}
+for i=3000,-3000,-1 do a[i] = i; end
+a[10e30] = "alo"; a[true] = 10; a[false] = 20
+assert(a[10e30] == 'alo' and a[not 1] == 20 and a[10<20] == 10)
+for i=3000,-3000,-1 do assert(a[i] == i); end
+a[print] = assert
+a[f] = print
+a[a] = a
+assert(a[a][a][a][a][print] == assert)
+a[print](a[a[f]] == a[print])
+assert(not pcall(function () local a = {}; a[nil] = 10 end))
+assert(not pcall(function () local a = {[nil] = 10} end))
+assert(a[nil] == nil)
+a = nil
+
+a = {10,9,8,7,6,5,4,3,2; [-3]='a', [f]=print, a='a', b='ab'}
+a, a.x, a.y = a, a[-3]
+assert(a[1]==10 and a[-3]==a.a and a[f]==print and a.x=='a' and not a.y)
+a[1], f(a)[2], b, c = {['alo']=assert}, 10, a[1], a[f], 6, 10, 23, f(a), 2
+a[1].alo(a[2]==10 and b==10 and c==print)
+
+a[2^31] = 10; a[2^31+1] = 11; a[-2^31] = 12;
+a[2^32] = 13; a[-2^32] = 14; a[2^32+1] = 15; a[10^33] = 16;
+
+assert(a[2^31] == 10 and a[2^31+1] == 11 and a[-2^31] == 12 and
+       a[2^32] == 13 and a[-2^32] == 14 and a[2^32+1] == 15 and
+       a[10^33] == 16)
+
+a = nil
+
+
+-- test conflicts in multiple assignment
+do
+  local a,i,j,b
+  a = {'a', 'b'}; i=1; j=2; b=a
+  i, a[i], a, j, a[j], a[i+j] = j, i, i, b, j, i
+  assert(i == 2 and b[1] == 1 and a == 1 and j == b and b[2] == 2 and
+         b[3] == 1)
+end
+
+-- repeat test with upvalues
+do
+  local a,i,j,b
+  a = {'a', 'b'}; i=1; j=2; b=a
+  local function foo ()
+    i, a[i], a, j, a[j], a[i+j] = j, i, i, b, j, i
+  end
+  foo()
+  assert(i == 2 and b[1] == 1 and a == 1 and j == b and b[2] == 2 and
+         b[3] == 1)
+  local t = {}
+  (function (a) t[a], a = 10, 20  end)(1);
+  assert(t[1] == 10)
+end
+
+-- bug in 5.2 beta
+local function foo ()
+  local a
+  return function ()
+    local b
+    a, b = 3, 14    -- local and upvalue have same index
+    return a, b
+  end
+end
+
+local a, b = foo()()
+assert(a == 3 and b == 14)
+
+print('OK')
+
+return res
+

tests/Lua.Tests/tests-lua/big.lua

@@ -0,0 +1,79 @@
+if _soft then
+  return 'a'
+end
+
+print "testing large tables"
+
+local debug = require"debug" 
+
+local lim = 2^18 + 1000
+local prog = { "local y = {0" }
+for i = 1, lim do prog[#prog + 1] = i  end
+prog[#prog + 1] = "}\n"
+prog[#prog + 1] = "X = y\n"
+prog[#prog + 1] = ("assert(X[%d] == %d)"):format(lim - 1, lim - 2)
+prog[#prog + 1] = "return 0"
+prog = table.concat(prog, ";")
+
+local env = {string = string, assert = assert}
+local f = assert(load(prog, nil, nil, env))
+
+f()
+assert(env.X[lim] == lim - 1 and env.X[lim + 1] == lim)
+for k in pairs(env) do env[k] = nil end
+
+-- yields during accesses larger than K (in RK)
+setmetatable(env, {
+  __index = function (t, n) coroutine.yield('g'); return _G[n] end,
+  __newindex = function (t, n, v) coroutine.yield('s'); _G[n] = v end,
+})
+
+X = nil
+co = coroutine.wrap(f)
+assert(co() == 's')
+assert(co() == 'g')
+assert(co() == 'g')
+assert(co() == 0)
+
+assert(X[lim] == lim - 1 and X[lim + 1] == lim)
+
+-- errors in accesses larger than K (in RK)
+getmetatable(env).__index = function () end
+getmetatable(env).__newindex = function () end
+local e, m = pcall(f)
+assert(not e and m:find("global 'X'"))
+
+-- errors in metamethods 
+getmetatable(env).__newindex = function () error("hi") end
+local e, m = xpcall(f, debug.traceback)
+assert(not e and m:find("'__newindex'"))
+
+f, X = nil
+
+coroutine.yield'b'
+
+if not _no32 then   -- {
+
+print "testing string length overflow"
+
+local repstrings = 192          -- number of strings to be concatenated
+local ssize = math.ceil(2^32 / repstrings) + 1   -- size of each string
+
+assert(repstrings * ssize > 2^32)  -- this should be larger than maximum size_t
+
+local longs = string.rep("\0", ssize)   -- create one long string
+
+-- create function to concatentate 'repstrings' copies of its argument
+local rep = assert(load(
+  "local a = ...; return " .. string.rep("a", repstrings, "..")))
+
+local a, b = pcall(rep, longs)   -- call that function
+
+-- it should fail without creating string (result would be too large)
+assert(not a and string.find(b, "overflow"))
+
+end   -- }
+
+print'OK'
+
+return 'a'

tests/Lua.Tests/tests-lua/bitwise.lua

@@ -0,0 +1,115 @@
+print("testing bitwise operations")
+
+assert(bit32.band() == bit32.bnot(0))
+assert(bit32.btest() == true)
+assert(bit32.bor() == 0)
+assert(bit32.bxor() == 0)
+
+assert(bit32.band() == bit32.band(0xffffffff))
+assert(bit32.band(1,2) == 0)
+
+
+-- out-of-range numbers
+assert(bit32.band(-1) == 0xffffffff)
+assert(bit32.band(2^33 - 1) == 0xffffffff)
+assert(bit32.band(-2^33 - 1) == 0xffffffff)
+assert(bit32.band(2^33 + 1) == 1)
+assert(bit32.band(-2^33 + 1) == 1)
+assert(bit32.band(-2^40) == 0)
+assert(bit32.band(2^40) == 0)
+assert(bit32.band(-2^40 - 2) == 0xfffffffe)
+assert(bit32.band(2^40 - 4) == 0xfffffffc)
+
+assert(bit32.lrotate(0, -1) == 0)
+assert(bit32.lrotate(0, 7) == 0)
+assert(bit32.lrotate(0x12345678, 4) == 0x23456781)
+assert(bit32.rrotate(0x12345678, -4) == 0x23456781)
+assert(bit32.lrotate(0x12345678, -8) == 0x78123456)
+assert(bit32.rrotate(0x12345678, 8) == 0x78123456)
+assert(bit32.lrotate(0xaaaaaaaa, 2) == 0xaaaaaaaa)
+assert(bit32.lrotate(0xaaaaaaaa, -2) == 0xaaaaaaaa)
+for i = -50, 50 do
+  assert(bit32.lrotate(0x89abcdef, i) == bit32.lrotate(0x89abcdef, i%32))
+end
+
+assert(bit32.lshift(0x12345678, 4) == 0x23456780)
+assert(bit32.lshift(0x12345678, 8) == 0x34567800)
+assert(bit32.lshift(0x12345678, -4) == 0x01234567)
+assert(bit32.lshift(0x12345678, -8) == 0x00123456)
+assert(bit32.lshift(0x12345678, 32) == 0)
+assert(bit32.lshift(0x12345678, -32) == 0)
+assert(bit32.rshift(0x12345678, 4) == 0x01234567)
+assert(bit32.rshift(0x12345678, 8) == 0x00123456)
+assert(bit32.rshift(0x12345678, 32) == 0)
+assert(bit32.rshift(0x12345678, -32) == 0)
+assert(bit32.arshift(0x12345678, 0) == 0x12345678)
+assert(bit32.arshift(0x12345678, 1) == 0x12345678 / 2)
+assert(bit32.arshift(0x12345678, -1) == 0x12345678 * 2)
+assert(bit32.arshift(-1, 1) == 0xffffffff)
+assert(bit32.arshift(-1, 24) == 0xffffffff)
+assert(bit32.arshift(-1, 32) == 0xffffffff)
+assert(bit32.arshift(-1, -1) == (-1 * 2) % 2^32)
+
+print("+")
+-- some special cases
+local c = {0, 1, 2, 3, 10, 0x80000000, 0xaaaaaaaa, 0x55555555,
+           0xffffffff, 0x7fffffff}
+
+for _, b in pairs(c) do
+  assert(bit32.band(b) == b)
+  assert(bit32.band(b, b) == b)
+  assert(bit32.btest(b, b) == (b ~= 0))
+  assert(bit32.band(b, b, b) == b)
+  assert(bit32.btest(b, b, b) == (b ~= 0))
+  assert(bit32.band(b, bit32.bnot(b)) == 0)
+  assert(bit32.bor(b, bit32.bnot(b)) == bit32.bnot(0))
+  assert(bit32.bor(b) == b)
+  assert(bit32.bor(b, b) == b)
+  assert(bit32.bor(b, b, b) == b)
+  assert(bit32.bxor(b) == b)
+  assert(bit32.bxor(b, b) == 0)
+  assert(bit32.bxor(b, 0) == b)
+  assert(bit32.bnot(b) ~= b)
+  assert(bit32.bnot(bit32.bnot(b)) == b)
+  assert(bit32.bnot(b) == 2^32 - 1 - b)
+  assert(bit32.lrotate(b, 32) == b)
+  assert(bit32.rrotate(b, 32) == b)
+  assert(bit32.lshift(bit32.lshift(b, -4), 4) == bit32.band(b, bit32.bnot(0xf)))
+  assert(bit32.rshift(bit32.rshift(b, 4), -4) == bit32.band(b, bit32.bnot(0xf)))
+  for i = -40, 40 do
+    assert(bit32.lshift(b, i) == math.floor((b * 2^i) % 2^32))
+  end
+end
+
+assert(not pcall(bit32.band, {}))
+assert(not pcall(bit32.bnot, "a"))
+assert(not pcall(bit32.lshift, 45))
+assert(not pcall(bit32.lshift, 45, print))
+assert(not pcall(bit32.rshift, 45, print))
+
+print("+")
+
+
+-- testing extract/replace
+
+assert(bit32.extract(0x12345678, 0, 4) == 8)
+assert(bit32.extract(0x12345678, 4, 4) == 7)
+assert(bit32.extract(0xa0001111, 28, 4) == 0xa)
+assert(bit32.extract(0xa0001111, 31, 1) == 1)
+assert(bit32.extract(0x50000111, 31, 1) == 0)
+assert(bit32.extract(0xf2345679, 0, 32) == 0xf2345679)
+
+assert(not pcall(bit32.extract, 0, -1))
+assert(not pcall(bit32.extract, 0, 32))
+assert(not pcall(bit32.extract, 0, 0, 33))
+assert(not pcall(bit32.extract, 0, 31, 2))
+
+assert(bit32.replace(0x12345678, 5, 28, 4) == 0x52345678)
+assert(bit32.replace(0x12345678, 0x87654321, 0, 32) == 0x87654321)
+assert(bit32.replace(0, 1, 2) == 2^2)
+assert(bit32.replace(0, -1, 4) == 2^4)
+assert(bit32.replace(-1, 0, 31) == 2^31 - 1)
+assert(bit32.replace(-1, 0, 1, 2) == 2^32 - 7)
+
+
+print'OK'

tests/Lua.Tests/tests-lua/calls.lua

@@ -0,0 +1,310 @@
+print("testing functions and calls")
+
+local debug = require "debug"
+
+-- get the opportunity to test 'type' too ;)
+
+assert(type(1<2) == 'boolean')
+assert(type(true) == 'boolean' and type(false) == 'boolean')
+assert(type(nil) == 'nil' and type(-3) == 'number' and type'x' == 'string' and
+       type{} == 'table' and type(type) == 'function')
+
+assert(type(assert) == type(print))
+f = nil
+function f (x) return a:x (x) end
+assert(type(f) == 'function')
+
+
+-- testing local-function recursion
+fact = false
+do
+  local res = 1
+  local function fact (n)
+    if n==0 then return res
+    else return n*fact(n-1)
+    end
+  end
+  assert(fact(5) == 120)
+end
+assert(fact == false)
+
+-- testing declarations
+a = {i = 10}
+self = 20
+function a:x (x) return x+self.i end
+function a.y (x) return x+self end
+
+assert(a:x(1)+10 == a.y(1))
+
+a.t = {i=-100}
+a["t"].x = function (self, a,b) return self.i+a+b end
+
+assert(a.t:x(2,3) == -95)
+
+do
+  local a = {x=0}
+  function a:add (x) self.x, a.y = self.x+x, 20; return self end
+  assert(a:add(10):add(20):add(30).x == 60 and a.y == 20)
+end
+
+local a = {b={c={}}}
+
+function a.b.c.f1 (x) return x+1 end
+function a.b.c:f2 (x,y) self[x] = y end
+assert(a.b.c.f1(4) == 5)
+a.b.c:f2('k', 12); assert(a.b.c.k == 12)
+
+print('+')
+
+t = nil   -- 'declare' t
+function f(a,b,c) local d = 'a'; t={a,b,c,d} end
+
+f(      -- this line change must be valid
+  1,2)
+assert(t[1] == 1 and t[2] == 2 and t[3] == nil and t[4] == 'a')
+f(1,2,   -- this one too
+      3,4)
+assert(t[1] == 1 and t[2] == 2 and t[3] == 3 and t[4] == 'a')
+
+function fat(x)
+  if x <= 1 then return 1
+  else return x*load("return fat(" .. x-1 .. ")")()
+  end
+end
+
+assert(load "load 'assert(fat(6)==720)' () ")()
+a = load('return fat(5), 3')
+a,b = a()
+assert(a == 120 and b == 3)
+print('+')
+
+function err_on_n (n)
+  if n==0 then error(); exit(1);
+  else err_on_n (n-1); exit(1);
+  end
+end
+
+do
+  function dummy (n)
+    if n > 0 then
+      assert(not pcall(err_on_n, n))
+      dummy(n-1)
+    end
+  end
+end
+
+dummy(10)
+
+function deep (n)
+  if n>0 then deep(n-1) end
+end
+deep(10)
+deep(200)
+
+-- testing tail call
+function deep (n) if n>0 then return deep(n-1) else return 101 end end
+assert(deep(30000) == 101)
+a = {}
+function a:deep (n) if n>0 then return self:deep(n-1) else return 101 end end
+assert(a:deep(30000) == 101)
+
+print('+')
+
+
+a = nil
+(function (x) a=x end)(23)
+assert(a == 23 and (function (x) return x*2 end)(20) == 40)
+
+
+-- testing closures
+
+-- fixed-point operator
+Z = function (le)
+      local function a (f)
+        return le(function (x) return f(f)(x) end)
+      end
+      return a(a)
+    end
+
+
+-- non-recursive factorial
+
+F = function (f)
+      return function (n)
+               if n == 0 then return 1
+               else return n*f(n-1) end
+             end
+    end
+
+fat = Z(F)
+
+assert(fat(0) == 1 and fat(4) == 24 and Z(F)(5)==5*Z(F)(4))
+
+local function g (z)
+  local function f (a,b,c,d)
+    return function (x,y) return a+b+c+d+a+x+y+z end
+  end
+  return f(z,z+1,z+2,z+3)
+end
+
+f = g(10)
+assert(f(9, 16) == 10+11+12+13+10+9+16+10)
+
+Z, F, f = nil
+print('+')
+
+-- testing multiple returns
+
+function unlpack (t, i)
+  i = i or 1
+  if (i <= #t) then
+    return t[i], unlpack(t, i+1)
+  end
+end
+
+function equaltab (t1, t2)
+  assert(#t1 == #t2)
+  for i = 1, #t1 do
+    assert(t1[i] == t2[i])
+  end
+end
+
+local pack = function (...) return (table.pack(...)) end
+
+function f() return 1,2,30,4 end
+function ret2 (a,b) return a,b end
+
+local a,b,c,d = unlpack{1,2,3}
+assert(a==1 and b==2 and c==3 and d==nil)
+a = {1,2,3,4,false,10,'alo',false,assert}
+equaltab(pack(unlpack(a)), a)
+equaltab(pack(unlpack(a), -1), {1,-1})
+a,b,c,d = ret2(f()), ret2(f())
+assert(a==1 and b==1 and c==2 and d==nil)
+a,b,c,d = unlpack(pack(ret2(f()), ret2(f())))
+assert(a==1 and b==1 and c==2 and d==nil)
+a,b,c,d = unlpack(pack(ret2(f()), (ret2(f()))))
+assert(a==1 and b==1 and c==nil and d==nil)
+
+a = ret2{ unlpack{1,2,3}, unlpack{3,2,1}, unlpack{"a", "b"}}
+assert(a[1] == 1 and a[2] == 3 and a[3] == "a" and a[4] == "b")
+
+
+-- testing calls with 'incorrect' arguments
+rawget({}, "x", 1)
+rawset({}, "x", 1, 2)
+assert(math.sin(1,2) == math.sin(1))
+table.sort({10,9,8,4,19,23,0,0}, function (a,b) return a<b end, "extra arg")
+
+
+-- test for generic load
+local x = "-- a comment\0\0\0\n  x = 10 + \n23; \
+     local a = function () x = 'hi' end; \
+     return '\0'"
+function read1 (x)
+  local i = 0
+  return function ()
+    collectgarbage()
+    i=i+1
+    return string.sub(x, i, i)
+  end
+end
+
+function cannotload (msg, a,b)
+  assert(not a and string.find(b, msg))
+end
+
+a = assert(load(read1(x), "modname", "t", _G))
+assert(a() == "\0" and _G.x == 33)
+assert(debug.getinfo(a).source == "modname")
+-- cannot read text in binary mode
+cannotload("attempt to load a text chunk", load(read1(x), "modname", "b", {}))
+cannotload("attempt to load a text chunk", load(x, "modname", "b"))
+
+a = assert(load(function () return nil end))
+a()  -- empty chunk
+
+assert(not load(function () return true end))
+
+
+-- small bug
+local t = {nil, "return ", "3"}
+f, msg = load(function () return table.remove(t, 1) end)
+assert(f() == nil)   -- should read the empty chunk
+
+-- another small bug (in 5.2.1)
+f = load(string.dump(function () return 1 end), nil, "b", {})
+assert(type(f) == "function" and f() == 1)
+
+
+x = string.dump(load("x = 1; return x"))
+a = assert(load(read1(x), nil, "b"))
+assert(a() == 1 and _G.x == 1)
+cannotload("attempt to load a binary chunk", load(read1(x), nil, "t"))
+cannotload("attempt to load a binary chunk", load(x, nil, "t"))
+
+assert(not pcall(string.dump, print))  -- no dump of C functions
+
+cannotload("unexpected symbol", load(read1("*a = 123")))
+cannotload("unexpected symbol", load("*a = 123"))
+cannotload("hhi", load(function () error("hhi") end))
+
+-- any value is valid for _ENV
+assert(load("return _ENV", nil, nil, 123)() == 123)
+
+
+-- load when _ENV is not first upvalue
+local x; XX = 123
+local function h ()
+  local y=x   -- use 'x', so that it becomes 1st upvalue
+  return XX   -- global name
+end
+local d = string.dump(h)
+x = load(d, "", "b")
+assert(debug.getupvalue(x, 2) == '_ENV')
+debug.setupvalue(x, 2, _G)
+assert(x() == 123)
+
+assert(assert(load("return XX + ...", nil, nil, {XX = 13}))(4) == 17)
+
+
+-- test generic load with nested functions
+x = [[
+  return function (x)
+    return function (y)
+     return function (z)
+       return x+y+z
+     end
+   end
+  end
+]]
+
+a = assert(load(read1(x)))
+assert(a()(2)(3)(10) == 15)
+
+
+-- test for dump/undump with upvalues
+local a, b = 20, 30
+x = load(string.dump(function (x)
+  if x == "set" then a = 10+b; b = b+1 else
+  return a
+  end
+end))
+assert(x() == nil)
+assert(debug.setupvalue(x, 1, "hi") == "a")
+assert(x() == "hi")
+assert(debug.setupvalue(x, 2, 13) == "b")
+assert(not debug.setupvalue(x, 3, 10))   -- only 2 upvalues
+x("set")
+assert(x() == 23)
+x("set")
+assert(x() == 24)
+
+
+-- test for bug in parameter adjustment
+assert((function () return nil end)(4) == nil)
+assert((function () local a; return a end)(4) == nil)
+assert((function (a) return a end)() == nil)
+
+print('OK')
+return deep

tests/Lua.Tests/tests-lua/closure.lua

@@ -0,0 +1,244 @@
+print ("testing closures")
+
+local A,B = 0,{g=10}
+function f(x)
+  local a = {}
+  for i=1,1000 do
+    local y = 0
+    do
+      a[i] = function () B.g = B.g+1; y = y+x; return y+A end
+    end
+  end
+  local dummy = function () return a[A] end
+  collectgarbage()
+  A = 1; assert(dummy() == a[1]); A = 0;
+  assert(a[1]() == x)
+  assert(a[3]() == x)
+  collectgarbage()
+  assert(B.g == 12)
+  return a
+end
+
+local a = f(10)
+-- force a GC in this level
+local x = {[1] = {}}   -- to detect a GC
+setmetatable(x, {__mode = 'kv'})
+while x[1] do   -- repeat until GC
+  local a = A..A..A..A  -- create garbage
+  A = A+1
+end
+assert(a[1]() == 20+A)
+assert(a[1]() == 30+A)
+assert(a[2]() == 10+A)
+collectgarbage()
+assert(a[2]() == 20+A)
+assert(a[2]() == 30+A)
+assert(a[3]() == 20+A)
+assert(a[8]() == 10+A)
+assert(getmetatable(x).__mode == 'kv')
+assert(B.g == 19)
+
+
+-- testing equality
+a = {}
+for i = 1, 5 do  a[i] = function (x) return x + a + _ENV end  end
+assert(a[3] == a[4] and a[4] == a[5])
+
+for i = 1, 5 do  a[i] = function (x) return i + a + _ENV end  end
+assert(a[3] ~= a[4] and a[4] ~= a[5])
+
+local function f()
+  return function (x)  return math.sin(_ENV[x])  end
+end
+assert(f() == f())
+
+
+-- testing closures with 'for' control variable
+a = {}
+for i=1,10 do
+  a[i] = {set = function(x) i=x end, get = function () return i end}
+  if i == 3 then break end
+end
+assert(a[4] == nil)
+a[1].set(10)
+assert(a[2].get() == 2)
+a[2].set('a')
+assert(a[3].get() == 3)
+assert(a[2].get() == 'a')
+
+a = {}
+local t = {"a", "b"}
+for i = 1, #t do
+  local k = t[i]
+  a[i] = {set = function(x, y) i=x; k=y end,
+          get = function () return i, k end}
+  if i == 2 then break end
+end
+a[1].set(10, 20)
+local r,s = a[2].get()
+assert(r == 2 and s == 'b')
+r,s = a[1].get()
+assert(r == 10 and s == 20)
+a[2].set('a', 'b')
+r,s = a[2].get()
+assert(r == "a" and s == "b")
+
+
+-- testing closures with 'for' control variable x break
+for i=1,3 do
+  f = function () return i end
+  break
+end
+assert(f() == 1)
+
+for k = 1, #t do
+  local v = t[k]
+  f = function () return k, v end
+  break
+end
+assert(({f()})[1] == 1)
+assert(({f()})[2] == "a")
+
+
+-- testing closure x break x return x errors
+
+local b
+function f(x)
+  local first = 1
+  while 1 do
+    if x == 3 and not first then return end
+    local a = 'xuxu'
+    b = function (op, y)
+          if op == 'set' then
+            a = x+y
+          else
+            return a
+          end
+        end
+    if x == 1 then do break end
+    elseif x == 2 then return
+    else if x ~= 3 then error() end
+    end
+    first = nil
+  end
+end
+
+for i=1,3 do
+  f(i)
+  assert(b('get') == 'xuxu')
+  b('set', 10); assert(b('get') == 10+i)
+  b = nil
+end
+
+pcall(f, 4);
+assert(b('get') == 'xuxu')
+b('set', 10); assert(b('get') == 14)
+
+
+local w
+-- testing multi-level closure
+function f(x)
+  return function (y)
+    return function (z) return w+x+y+z end
+  end
+end
+
+y = f(10)
+w = 1.345
+assert(y(20)(30) == 60+w)
+
+-- testing closures x repeat-until
+
+local a = {}
+local i = 1
+repeat
+  local x = i
+  a[i] = function () i = x+1; return x end
+until i > 10 or a[i]() ~= x
+assert(i == 11 and a[1]() == 1 and a[3]() == 3 and i == 4)
+
+
+-- testing closures created in 'then' and 'else' parts of 'if's
+a = {}
+for i = 1, 10 do
+  if i % 3 == 0 then
+    local y = 0
+    a[i] = function (x) local t = y; y = x; return t end
+  elseif i % 3 == 1 then
+    goto L1
+    error'not here'
+  ::L1::
+    local y = 1
+    a[i] = function (x) local t = y; y = x; return t end
+  elseif i % 3 == 2 then
+    local t
+    goto l4
+    ::l4a:: a[i] = t; goto l4b
+    error("should never be here!")
+    ::l4::
+    local y = 2
+    t = function (x) local t = y; y = x; return t end
+    goto l4a
+    error("should never be here!")
+    ::l4b::
+  end
+end
+
+for i = 1, 10 do
+  assert(a[i](i * 10) == i % 3 and a[i]() == i * 10)
+end
+
+print'+'
+
+
+-- test for correctly closing upvalues in tail calls of vararg functions
+local function t ()
+  local function c(a,b) assert(a=="test" and b=="OK") end
+  local function v(f, ...) c("test", f() ~= 1 and "FAILED" or "OK") end
+  local x = 1
+  return v(function() return x end)
+end
+t()
+
+
+-- test for debug manipulation of upvalues
+local debug = require'debug'
+
+do
+  local a , b, c = 3, 5, 7
+  foo1 = function () return a+b end;
+  foo2 = function () return b+a end;
+  do
+    local a = 10
+    foo3 = function () return a+b end;
+  end
+end
+
+assert(debug.upvalueid(foo1, 1))
+assert(debug.upvalueid(foo1, 2))
+assert(not pcall(debug.upvalueid, foo1, 3))
+assert(debug.upvalueid(foo1, 1) == debug.upvalueid(foo2, 2))
+assert(debug.upvalueid(foo1, 2) == debug.upvalueid(foo2, 1))
+assert(debug.upvalueid(foo3, 1))
+assert(debug.upvalueid(foo1, 1) ~= debug.upvalueid(foo3, 1))
+assert(debug.upvalueid(foo1, 2) == debug.upvalueid(foo3, 2))
+
+assert(debug.upvalueid(string.gmatch("x", "x"), 1) ~= nil)
+
+assert(foo1() == 3 + 5 and foo2() == 5 + 3)
+debug.upvaluejoin(foo1, 2, foo2, 2)
+assert(foo1() == 3 + 3 and foo2() == 5 + 3)
+assert(foo3() == 10 + 5)
+debug.upvaluejoin(foo3, 2, foo2, 1)
+assert(foo3() == 10 + 5)
+debug.upvaluejoin(foo3, 2, foo2, 2)
+assert(foo3() == 10 + 3)
+
+assert(not pcall(debug.upvaluejoin, foo1, 3, foo2, 1))
+assert(not pcall(debug.upvaluejoin, foo1, 1, foo2, 3))
+assert(not pcall(debug.upvaluejoin, foo1, 0, foo2, 1))
+assert(not pcall(debug.upvaluejoin, print, 1, foo2, 1))
+assert(not pcall(debug.upvaluejoin, {}, 1, foo2, 1))
+assert(not pcall(debug.upvaluejoin, foo1, 1, print, 1))
+
+print('OK')

tests/Lua.Tests/tests-lua/code.lua

@@ -0,0 +1,182 @@
+if T==nil then
+  (Message or print)('\a\n >>> testC not active: skipping opcode tests <<<\n\a')
+  return
+end
+print "testing code generation and optimizations"
+
+
+-- this code gave an error for the code checker
+do
+  local function f (a)
+  for k,v,w in a do end
+  end
+end
+
+
+function check (f, ...)
+  local arg = {...}
+  local c = T.listcode(f)
+  for i=1, #arg do
+    -- print(arg[i], c[i])
+    assert(string.find(c[i], '- '..arg[i]..' *%d'))
+  end
+  assert(c[#arg+2] == nil)
+end
+
+
+function checkequal (a, b)
+  a = T.listcode(a)
+  b = T.listcode(b)
+  for i = 1, #a do
+    a[i] = string.gsub(a[i], '%b()', '')   -- remove line number
+    b[i] = string.gsub(b[i], '%b()', '')   -- remove line number
+    assert(a[i] == b[i])
+  end
+end
+
+
+-- some basic instructions
+check(function ()
+  (function () end){f()}
+end, 'CLOSURE', 'NEWTABLE', 'GETTABUP', 'CALL', 'SETLIST', 'CALL', 'RETURN')
+
+
+-- sequence of LOADNILs
+check(function ()
+  local a,b,c
+  local d; local e;
+  local f,g,h;
+  d = nil; d=nil; b=nil; a=nil; c=nil;
+end, 'LOADNIL', 'RETURN')
+
+check(function ()
+  local a,b,c,d = 1,1,1,1
+  d=nil;c=nil;b=nil;a=nil
+end, 'LOADK', 'LOADK', 'LOADK', 'LOADK', 'LOADNIL', 'RETURN')
+
+do
+  local a,b,c,d = 1,1,1,1
+  d=nil;c=nil;b=nil;a=nil
+  assert(a == nil and b == nil and c == nil and d == nil)
+end
+
+
+-- single return
+check (function (a,b,c) return a end, 'RETURN')
+
+
+-- infinite loops
+check(function () while true do local a = -1 end end,
+'LOADK', 'JMP', 'RETURN')
+
+check(function () while 1 do local a = -1 end end,
+'LOADK', 'JMP', 'RETURN')
+
+check(function () repeat local x = 1 until true end,
+'LOADK', 'RETURN')
+
+
+-- concat optimization
+check(function (a,b,c,d) return a..b..c..d end,
+  'MOVE', 'MOVE', 'MOVE', 'MOVE', 'CONCAT', 'RETURN')
+
+-- not
+check(function () return not not nil end, 'LOADBOOL', 'RETURN')
+check(function () return not not false end, 'LOADBOOL', 'RETURN')
+check(function () return not not true end, 'LOADBOOL', 'RETURN')
+check(function () return not not 1 end, 'LOADBOOL', 'RETURN')
+
+-- direct access to locals
+check(function ()
+  local a,b,c,d
+  a = b*2
+  c[4], a[b] = -((a + d/-20.5 - a[b]) ^ a.x), b
+end,
+  'LOADNIL',
+  'MUL',
+  'DIV', 'ADD', 'GETTABLE', 'SUB', 'GETTABLE', 'POW',
+    'UNM', 'SETTABLE', 'SETTABLE', 'RETURN')
+
+
+-- direct access to constants
+check(function ()
+  local a,b
+  a.x = 0
+  a.x = b
+  a[b] = 'y'
+  a = 1 - a
+  b = 1/a
+  b = 5+4
+  a[true] = false
+end,
+  'LOADNIL',
+  'SETTABLE', 'SETTABLE', 'SETTABLE', 'SUB', 'DIV', 'LOADK',
+  'SETTABLE', 'RETURN')
+
+-- constant folding
+local function f () return -((2^8 + -(-1)) % 8)/2 * 4 - 3 end
+
+check(f, 'LOADK', 'RETURN')
+assert(f() == -5)
+
+
+-- bug in constant folding for 5.1
+check(function () return -nil end,
+  'LOADNIL', 'UNM', 'RETURN')
+
+
+check(function ()
+  local a,b,c
+  b[c], a = c, b
+  b[a], a = c, b
+  a, b = c, a
+  a = a
+end, 
+  'LOADNIL',
+  'MOVE', 'MOVE', 'SETTABLE',
+  'MOVE', 'MOVE', 'MOVE', 'SETTABLE',
+  'MOVE', 'MOVE', 'MOVE',
+  -- no code for a = a
+  'RETURN')
+
+
+-- x == nil , x ~= nil
+checkequal(function () if (a==nil) then a=1 end; if a~=nil then a=1 end end,
+           function () if (a==9) then a=1 end; if a~=9 then a=1 end end)
+
+check(function () if a==nil then a=1 end end,
+'GETTABUP', 'EQ', 'JMP', 'SETTABUP', 'RETURN')
+
+-- de morgan
+checkequal(function () local a; if not (a or b) then b=a end end,
+           function () local a; if (not a and not b) then b=a end end)
+
+checkequal(function (l) local a; return 0 <= a and a <= l end,
+           function (l) local a; return not (not(a >= 0) or not(a <= l)) end)
+
+
+-- if-goto optimizations
+check(function (a)
+        if a == 1 then goto l1
+        elseif a == 2 then goto l2
+        elseif a == 3 then goto l2
+        else if a == 4 then goto l3
+             else goto l3
+             end
+        end
+        ::l1:: ::l2:: ::l3:: ::l4:: 
+end, 'EQ', 'JMP', 'EQ', 'JMP', 'EQ', 'JMP', 'EQ', 'JMP', 'JMP', 'RETURN')
+
+checkequal(
+function (a) while a < 10 do a = a + 1 end end,
+function (a) ::L2:: if not(a < 10) then goto L1 end; a = a + 1;
+                goto L2; ::L1:: end
+)
+
+checkequal(
+function (a) while a < 10 do a = a + 1 end end,
+function (a) while true do if not(a < 10) then break end; a = a + 1; end end
+)
+
+print 'OK'
+

tests/Lua.Tests/tests-lua/constructs.lua

@@ -0,0 +1,310 @@
+;;print "testing syntax";;
+
+local debug = require "debug"
+
+-- testing semicollons
+do ;;; end
+; do ; a = 3; assert(a == 3) end;
+;
+
+
+-- testing priorities
+
+assert(2^3^2 == 2^(3^2));
+assert(2^3*4 == (2^3)*4);
+assert(2^-2 == 1/4 and -2^- -2 == - - -4);
+assert(not nil and 2 and not(2>3 or 3<2));
+assert(-3-1-5 == 0+0-9);
+assert(-2^2 == -4 and (-2)^2 == 4 and 2*2-3-1 == 0);
+assert(2*1+3/3 == 3 and 1+2 .. 3*1 == "33");
+assert(not(2+1 > 3*1) and "a".."b" > "a");
+
+assert(not ((true or false) and nil))
+assert(      true or false  and nil)
+
+-- old bug
+assert((((1 or false) and true) or false) == true)
+assert((((nil and true) or false) and true) == false)
+
+local a,b = 1,nil;
+assert(-(1 or 2) == -1 and (1 and 2)+(-1.25 or -4) == 0.75);
+x = ((b or a)+1 == 2 and (10 or a)+1 == 11); assert(x);
+x = (((2<3) or 1) == true and (2<3 and 4) == 4); assert(x);
+
+x,y=1,2;
+assert((x>y) and x or y == 2);
+x,y=2,1;
+assert((x>y) and x or y == 2);
+
+assert(1234567890 == tonumber('1234567890') and 1234567890+1 == 1234567891)
+
+
+-- silly loops
+repeat until 1; repeat until true;
+while false do end; while nil do end;
+
+do  -- test old bug (first name could not be an `upvalue')
+ local a; function f(x) x={a=1}; x={x=1}; x={G=1} end
+end
+
+function f (i)
+  if type(i) ~= 'number' then return i,'jojo'; end;
+  if i > 0 then return i, f(i-1); end;
+end
+
+x = {f(3), f(5), f(10);};
+assert(x[1] == 3 and x[2] == 5 and x[3] == 10 and x[4] == 9 and x[12] == 1);
+assert(x[nil] == nil)
+x = {f'alo', f'xixi', nil};
+assert(x[1] == 'alo' and x[2] == 'xixi' and x[3] == nil);
+x = {f'alo'..'xixi'};
+assert(x[1] == 'aloxixi')
+x = {f{}}
+assert(x[2] == 'jojo' and type(x[1]) == 'table')
+
+
+local f = function (i)
+  if i < 10 then return 'a';
+  elseif i < 20 then return 'b';
+  elseif i < 30 then return 'c';
+  end;
+end
+
+assert(f(3) == 'a' and f(12) == 'b' and f(26) == 'c' and f(100) == nil)
+
+for i=1,1000 do break; end;
+n=100;
+i=3;
+t = {};
+a=nil
+while not a do
+  a=0; for i=1,n do for i=i,1,-1 do a=a+1; t[i]=1; end; end;
+end
+assert(a == n*(n+1)/2 and i==3);
+assert(t[1] and t[n] and not t[0] and not t[n+1])
+
+function f(b)
+  local x = 1;
+  repeat
+    local a;
+    if b==1 then local b=1; x=10; break
+    elseif b==2 then x=20; break;
+    elseif b==3 then x=30;
+    else local a,b,c,d=math.sin(1); x=x+1;
+    end
+  until x>=12;
+  return x;
+end;
+
+assert(f(1) == 10 and f(2) == 20 and f(3) == 30 and f(4)==12)
+
+
+local f = function (i)
+  if i < 10 then return 'a'
+  elseif i < 20 then return 'b'
+  elseif i < 30 then return 'c'
+  else return 8
+  end
+end
+
+assert(f(3) == 'a' and f(12) == 'b' and f(26) == 'c' and f(100) == 8)
+
+local a, b = nil, 23
+x = {f(100)*2+3 or a, a or b+2}
+assert(x[1] == 19 and x[2] == 25)
+x = {f=2+3 or a, a = b+2}
+assert(x.f == 5 and x.a == 25)
+
+a={y=1}
+x = {a.y}
+assert(x[1] == 1)
+
+function f(i)
+  while 1 do
+    if i>0 then i=i-1;
+    else return; end;
+  end;
+end;
+
+function g(i)
+  while 1 do
+    if i>0 then i=i-1
+    else return end
+  end
+end
+
+f(10); g(10);
+
+do
+  function f () return 1,2,3; end
+  local a, b, c = f();
+  assert(a==1 and b==2 and c==3)
+  a, b, c = (f());
+  assert(a==1 and b==nil and c==nil)
+end
+
+local a,b = 3 and f();
+assert(a==1 and b==nil)
+
+function g() f(); return; end;
+assert(g() == nil)
+function g() return nil or f() end
+a,b = g()
+assert(a==1 and b==nil)
+
+print'+';
+
+
+f = [[
+return function ( a , b , c , d , e )
+  local x = a >= b or c or ( d and e ) or nil
+  return x
+end , { a = 1 , b = 2 >= 1 , } or { 1 };
+]]
+f = string.gsub(f, "%s+", "\n");   -- force a SETLINE between opcodes
+f,a = load(f)();
+assert(a.a == 1 and a.b)
+
+function g (a,b,c,d,e)
+  if not (a>=b or c or d and e or nil) then return 0; else return 1; end;
+end
+
+function h (a,b,c,d,e)
+  while (a>=b or c or (d and e) or nil) do return 1; end;
+  return 0;
+end;
+
+assert(f(2,1) == true and g(2,1) == 1 and h(2,1) == 1)
+assert(f(1,2,'a') == 'a' and g(1,2,'a') == 1 and h(1,2,'a') == 1)
+assert(f(1,2,'a')
+~=          -- force SETLINE before nil
+nil, "")
+assert(f(1,2,'a') == 'a' and g(1,2,'a') == 1 and h(1,2,'a') == 1)
+assert(f(1,2,nil,1,'x') == 'x' and g(1,2,nil,1,'x') == 1 and
+                                   h(1,2,nil,1,'x') == 1)
+assert(f(1,2,nil,nil,'x') == nil and g(1,2,nil,nil,'x') == 0 and
+                                     h(1,2,nil,nil,'x') == 0)
+assert(f(1,2,nil,1,nil) == nil and g(1,2,nil,1,nil) == 0 and
+                                   h(1,2,nil,1,nil) == 0)
+
+assert(1 and 2<3 == true and 2<3 and 'a'<'b' == true)
+x = 2<3 and not 3; assert(x==false)
+x = 2<1 or (2>1 and 'a'); assert(x=='a')
+
+
+do
+  local a; if nil then a=1; else a=2; end;    -- this nil comes as PUSHNIL 2
+  assert(a==2)
+end
+
+function F(a)
+  assert(debug.getinfo(1, "n").name == 'F')
+  return a,2,3
+end
+
+a,b = F(1)~=nil; assert(a == true and b == nil);
+a,b = F(nil)==nil; assert(a == true and b == nil)
+
+----------------------------------------------------------------
+-- creates all combinations of 
+-- [not] ([not] arg op [not] (arg op [not] arg ))
+-- and tests each one
+
+function ID(x) return x end
+
+function f(t, i)
+  local b = t.n
+  local res = math.fmod(math.floor(i/c), b)+1
+  c = c*b
+  return t[res]
+end
+
+local arg = {" ( 1 < 2 ) ", " ( 1 >= 2 ) ", " F ( ) ", "  nil "; n=4}
+
+local op = {" and ", " or ", " == ", " ~= "; n=4}
+
+local neg = {" ", " not "; n=2}
+
+local i = 0
+repeat
+  c = 1
+  local s = f(neg, i)..'ID('..f(neg, i)..f(arg, i)..f(op, i)..
+            f(neg, i)..'ID('..f(arg, i)..f(op, i)..f(neg, i)..f(arg, i)..'))'
+  local s1 = string.gsub(s, 'ID', '')
+  K,X,NX,WX1,WX2 = nil
+  s = string.format([[
+      local a = %s
+      local b = not %s
+      K = b
+      local xxx; 
+      if %s then X = a  else X = b end
+      if %s then NX = b  else NX = a end
+      while %s do WX1 = a; break end
+      while %s do WX2 = a; break end
+      repeat if (%s) then break end; assert(b)  until not(%s)
+  ]], s1, s, s1, s, s1, s, s1, s, s)
+  assert(load(s))()
+  assert(X and not NX and not WX1 == K and not WX2 == K)
+  if math.fmod(i,4000) == 0 then print('+') end
+  i = i+1
+until i==c
+
+print '+'
+
+------------------------------------------------------------------
+print 'testing short-circuit optimizations'
+
+_ENV.GLOB1 = 1
+_ENV.GLOB2 = 2
+
+local basiccases = {
+  {"nil", nil},
+  {"false", false},
+  {"true", true},
+  {"10", 10},
+  {"(_ENV.GLOB1 < _ENV.GLOB2)", true},
+  {"(_ENV.GLOB2 < _ENV.GLOB1)", false},
+}
+
+
+local binops = {
+  {" and ", function (a,b) if not a then return a else return b end end},
+  {" or ", function (a,b) if a then return a else return b end end},
+}
+
+local mem = {basiccases}    -- for memoization
+
+local function allcases (n)
+  if mem[n] then return mem[n] end
+  local res = {}
+  -- include all smaller cases
+  for _, v in ipairs(allcases(n - 1)) do
+    res[#res + 1] = v
+  end
+  for i = 1, n - 1 do
+    for _, v1 in ipairs(allcases(i)) do
+      for _, v2 in ipairs(allcases(n - i)) do
+        for _, op in ipairs(binops) do
+            res[#res + 1] = {
+              "(" .. v1[1] .. op[1] .. v2[1] .. ")",
+              op[2](v1[2], v2[2])
+            }
+        end
+      end
+    end
+    print('+')
+  end
+  mem[n] = res   -- memoize
+  return res
+end
+
+-- do not do too many combinations for soft tests
+local level = _soft and 3 or 4
+
+for _, v in pairs(allcases(level)) do
+  local res = load("return " .. v[1])()
+  assert(res == v[2])
+end
+------------------------------------------------------------------
+
+print'OK'

tests/Lua.Tests/tests-lua/coroutine.lua

@@ -0,0 +1,728 @@
+print "testing coroutines"
+
+local debug = require'debug'
+
+local f
+
+local main, ismain = coroutine.running()
+assert(type(main) == "thread" and ismain)
+assert(not coroutine.resume(main))
+assert(not pcall(coroutine.yield))
+
+
+
+-- tests for multiple yield/resume arguments
+
+local function eqtab (t1, t2)
+  assert(#t1 == #t2)
+  for i = 1, #t1 do
+    local v = t1[i]
+    assert(t2[i] == v)
+  end
+end
+
+_G.x = nil   -- declare x
+function foo (a, ...)
+  local x, y = coroutine.running()
+  assert(x == f and y == false)
+  assert(coroutine.status(f) == "running")
+  local arg = {...}
+  for i=1,#arg do
+    _G.x = {coroutine.yield(table.unpack(arg[i]))}
+  end
+  return table.unpack(a)
+end
+
+f = coroutine.create(foo)
+assert(type(f) == "thread" and coroutine.status(f) == "suspended")
+assert(string.find(tostring(f), "thread"))
+local s,a,b,c,d
+s,a,b,c,d = coroutine.resume(f, {1,2,3}, {}, {1}, {'a', 'b', 'c'})
+assert(s and a == nil and coroutine.status(f) == "suspended")
+s,a,b,c,d = coroutine.resume(f)
+eqtab(_G.x, {})
+assert(s and a == 1 and b == nil)
+s,a,b,c,d = coroutine.resume(f, 1, 2, 3)
+eqtab(_G.x, {1, 2, 3})
+assert(s and a == 'a' and b == 'b' and c == 'c' and d == nil)
+s,a,b,c,d = coroutine.resume(f, "xuxu")
+eqtab(_G.x, {"xuxu"})
+assert(s and a == 1 and b == 2 and c == 3 and d == nil)
+assert(coroutine.status(f) == "dead")
+s, a = coroutine.resume(f, "xuxu")
+assert(not s and string.find(a, "dead") and coroutine.status(f) == "dead")
+
+
+-- yields in tail calls
+local function foo (i) return coroutine.yield(i) end
+f = coroutine.wrap(function ()
+  for i=1,10 do
+    assert(foo(i) == _G.x)
+  end
+  return 'a'
+end)
+for i=1,10 do _G.x = i; assert(f(i) == i) end
+_G.x = 'xuxu'; assert(f('xuxu') == 'a')
+
+-- recursive
+function pf (n, i)
+  coroutine.yield(n)
+  pf(n*i, i+1)
+end
+
+f = coroutine.wrap(pf)
+local s=1
+for i=1,10 do
+  assert(f(1, 1) == s)
+  s = s*i
+end
+
+-- sieve
+function gen (n)
+  return coroutine.wrap(function ()
+    for i=2,n do coroutine.yield(i) end
+  end)
+end
+
+
+function filter (p, g)
+  return coroutine.wrap(function ()
+    while 1 do
+      local n = g()
+      if n == nil then return end
+      if math.fmod(n, p) ~= 0 then coroutine.yield(n) end
+    end
+  end)
+end
+
+local x = gen(100)
+local a = {}
+while 1 do
+  local n = x()
+  if n == nil then break end
+  table.insert(a, n)
+  x = filter(n, x)
+end
+
+assert(#a == 25 and a[#a] == 97)
+
+
+-- yielding across C boundaries
+
+co = coroutine.wrap(function()
+       assert(not pcall(table.sort,{1,2,3}, coroutine.yield))
+       coroutine.yield(20)
+       return 30
+     end)
+
+assert(co() == 20)
+assert(co() == 30)
+
+
+local f = function (s, i) return coroutine.yield(i) end
+
+local f1 = coroutine.wrap(function ()
+             return xpcall(pcall, function (...) return ... end,
+               function ()
+                 local s = 0
+                 for i in f, nil, 1 do pcall(function () s = s + i end) end
+                 error({s})
+               end)
+           end)
+
+f1()
+for i = 1, 10 do assert(f1(i) == i) end
+local r1, r2, v = f1(nil)
+assert(r1 and not r2 and v[1] ==  (10 + 1)*10/2)
+
+
+function f (a, b) a = coroutine.yield(a);  error{a + b} end
+function g(x) return x[1]*2 end
+
+co = coroutine.wrap(function ()
+       coroutine.yield(xpcall(f, g, 10, 20))
+     end)
+
+assert(co() == 10)
+r, msg = co(100)
+assert(not r and msg == 240)
+
+
+-- errors in coroutines
+function foo ()
+  assert(debug.getinfo(1).currentline == debug.getinfo(foo).linedefined + 1)
+  assert(debug.getinfo(2).currentline == debug.getinfo(goo).linedefined)
+  coroutine.yield(3)
+  error(foo)
+end
+
+function goo() foo() end
+x = coroutine.wrap(goo)
+assert(x() == 3)
+local a,b = pcall(x)
+assert(not a and b == foo)
+
+x = coroutine.create(goo)
+a,b = coroutine.resume(x)
+assert(a and b == 3)
+a,b = coroutine.resume(x)
+assert(not a and b == foo and coroutine.status(x) == "dead")
+a,b = coroutine.resume(x)
+assert(not a and string.find(b, "dead") and coroutine.status(x) == "dead")
+
+
+-- co-routines x for loop
+function all (a, n, k)
+  if k == 0 then coroutine.yield(a)
+  else
+    for i=1,n do
+      a[k] = i
+      all(a, n, k-1)
+    end
+  end
+end
+
+local a = 0
+for t in coroutine.wrap(function () all({}, 5, 4) end) do
+  a = a+1
+end
+assert(a == 5^4)
+
+
+-- access to locals of collected corroutines
+local C = {}; setmetatable(C, {__mode = "kv"})
+local x = coroutine.wrap (function ()
+            local a = 10
+            local function f () a = a+10; return a end
+            while true do
+              a = a+1
+              coroutine.yield(f)
+            end
+          end)
+
+C[1] = x;
+
+local f = x()
+assert(f() == 21 and x()() == 32 and x() == f)
+x = nil
+collectgarbage()
+assert(C[1] == nil)
+assert(f() == 43 and f() == 53)
+
+
+-- old bug: attempt to resume itself
+
+function co_func (current_co)
+  assert(coroutine.running() == current_co)
+  assert(coroutine.resume(current_co) == false)
+  assert(coroutine.resume(current_co) == false)
+  return 10
+end
+
+local co = coroutine.create(co_func)
+local a,b = coroutine.resume(co, co)
+assert(a == true and b == 10)
+assert(coroutine.resume(co, co) == false)
+assert(coroutine.resume(co, co) == false)
+
+
+-- attempt to resume 'normal' coroutine
+co1 = coroutine.create(function () return co2() end)
+co2 = coroutine.wrap(function ()
+        assert(coroutine.status(co1) == 'normal')
+        assert(not coroutine.resume(co1))
+        coroutine.yield(3)
+      end)
+
+a,b = coroutine.resume(co1)
+assert(a and b == 3)
+assert(coroutine.status(co1) == 'dead')
+
+-- infinite recursion of coroutines
+a = function(a) coroutine.wrap(a)(a) end
+assert(not pcall(a, a))
+
+
+-- access to locals of erroneous coroutines
+local x = coroutine.create (function ()
+            local a = 10
+            _G.f = function () a=a+1; return a end
+            error('x')
+          end)
+
+assert(not coroutine.resume(x))
+-- overwrite previous position of local `a'
+assert(not coroutine.resume(x, 1, 1, 1, 1, 1, 1, 1))
+assert(_G.f() == 11)
+assert(_G.f() == 12)
+
+
+if not T then
+  (Message or print)('\a\n >>> testC not active: skipping yield/hook tests <<<\n\a')
+else
+  print "testing yields inside hooks"
+
+  local turn
+  
+  function fact (t, x)
+    assert(turn == t)
+    if x == 0 then return 1
+    else return x*fact(t, x-1)
+    end
+  end
+
+  local A,B,a,b = 0,0,0,0
+
+  local x = coroutine.create(function ()
+    T.sethook("yield 0", "", 2)
+    A = fact("A", 10)
+  end)
+
+  local y = coroutine.create(function ()
+    T.sethook("yield 0", "", 3)
+    B = fact("B", 11)
+  end)
+
+  while A==0 or B==0 do
+    if A==0 then turn = "A"; assert(T.resume(x)) end
+    if B==0 then turn = "B"; assert(T.resume(y)) end
+  end
+
+  assert(B/A == 11)
+
+  local line = debug.getinfo(1, "l").currentline + 2    -- get line number
+  local function foo ()
+    local x = 10    --<< this line is 'line'
+    x = x + 10
+    _G.XX = x
+  end
+
+  -- testing yields in line hook
+  local co = coroutine.wrap(function ()
+    T.sethook("setglobal X; yield 0", "l", 0); foo(); return 10 end)
+
+  _G.XX = nil;
+  _G.X = nil; co(); assert(_G.X == line)
+  _G.X = nil; co(); assert(_G.X == line + 1)
+  _G.X = nil; co(); assert(_G.X == line + 2 and _G.XX == nil)
+  _G.X = nil; co(); assert(_G.X == line + 3 and _G.XX == 20)
+  assert(co() == 10)
+
+  -- testing yields in count hook
+  co = coroutine.wrap(function ()
+    T.sethook("yield 0", "", 1); foo(); return 10 end)
+
+  _G.XX = nil;
+  local c = 0
+  repeat c = c + 1; local a = co() until a == 10
+  assert(_G.XX == 20 and c == 10)
+
+  co = coroutine.wrap(function ()
+    T.sethook("yield 0", "", 2); foo(); return 10 end)
+
+  _G.XX = nil;
+  local c = 0
+  repeat c = c + 1; local a = co() until a == 10
+  assert(_G.XX == 20 and c == 5)
+  _G.X = nil; _G.XX = nil
+
+
+  print "testing coroutine API"
+  
+  -- reusing a thread
+  assert(T.testC([[
+    newthread      # create thread
+    pushvalue 2    # push body
+    pushstring 'a a a'  # push argument
+    xmove 0 3 2   # move values to new thread
+    resume -1, 1    # call it first time
+    pushstatus
+    xmove 3 0 0   # move results back to stack
+    setglobal X    # result
+    setglobal Y    # status
+    pushvalue 2     # push body (to call it again)
+    pushstring 'b b b'
+    xmove 0 3 2
+    resume -1, 1    # call it again
+    pushstatus
+    xmove 3 0 0
+    return 1        # return result
+  ]], function (...) return ... end) == 'b b b')
+
+  assert(X == 'a a a' and Y == 'OK')
+
+
+  -- resuming running coroutine
+  C = coroutine.create(function ()
+        return T.testC([[
+                 pushnum 10;
+                 pushnum 20;
+                 resume -3 2;
+                 pushstatus
+                 gettop;
+                 return 3]], C)
+      end)
+  local a, b, c, d = coroutine.resume(C)
+  assert(a == true and string.find(b, "non%-suspended") and
+         c == "ERRRUN" and d == 4)
+
+  a, b, c, d = T.testC([[
+    rawgeti R 1    # get main thread
+    pushnum 10;
+    pushnum 20;
+    resume -3 2;
+    pushstatus
+    gettop;
+    return 4]])
+  assert(a == coroutine.running() and string.find(b, "non%-suspended") and
+         c == "ERRRUN" and d == 4)
+
+
+  -- using a main thread as a coroutine
+  local state = T.newstate()
+  T.loadlib(state)
+
+  assert(T.doremote(state, [[
+    coroutine = require'coroutine';
+    X = function (x) coroutine.yield(x, 'BB'); return 'CC' end;
+    return 'ok']]))
+
+  t = table.pack(T.testC(state, [[
+    rawgeti R 1     # get main thread
+    pushstring 'XX'
+    getglobal X    # get function for body
+    pushstring AA      # arg
+    resume 1 1      # 'resume' shadows previous stack!
+    gettop
+    setglobal T    # top
+    setglobal B    # second yielded value
+    setglobal A    # fist yielded value
+    rawgeti R 1     # get main thread
+    pushnum 5       # arg (noise)
+    resume 1 1      # after coroutine ends, previous stack is back
+    pushstatus
+    gettop
+    return .
+  ]]))
+  assert(t.n == 4 and t[2] == 'XX' and t[3] == 'CC' and t[4] == 'OK')
+  assert(T.doremote(state, "return T") == '2')
+  assert(T.doremote(state, "return A") == 'AA')
+  assert(T.doremote(state, "return B") == 'BB')
+
+  T.closestate(state)
+
+  print'+'
+
+end
+
+
+-- leaving a pending coroutine open
+_X = coroutine.wrap(function ()
+      local a = 10
+      local x = function () a = a+1 end
+      coroutine.yield()
+    end)
+
+_X()
+
+
+if not _soft then
+  -- bug (stack overflow)
+  local j = 2^9
+  local lim = 1000000    -- (C stack limit; assume 32-bit machine)
+  local t = {lim - 10, lim - 5, lim - 1, lim, lim + 1}
+  for i = 1, #t do
+    local j = t[i]
+    co = coroutine.create(function()
+           local t = {}
+           for i = 1, j do t[i] = i end
+           return table.unpack(t)
+         end)
+    local r, msg = coroutine.resume(co)
+    assert(not r)
+  end
+end
+
+
+assert(coroutine.running() == main)
+
+print"+"
+
+
+print"testing yields inside metamethods"
+
+local mt = {
+  __eq = function(a,b) coroutine.yield(nil, "eq"); return a.x == b.x end,
+  __lt = function(a,b) coroutine.yield(nil, "lt"); return a.x < b.x end,
+  __le = function(a,b) coroutine.yield(nil, "le"); return a - b <= 0 end,
+  __add = function(a,b) coroutine.yield(nil, "add"); return a.x + b.x end,
+  __sub = function(a,b) coroutine.yield(nil, "sub"); return a.x - b.x end,
+  __concat = function(a,b)
+               coroutine.yield(nil, "concat");
+               a = type(a) == "table" and a.x or a
+               b = type(b) == "table" and b.x or b
+               return a .. b
+             end,
+  __index = function (t,k) coroutine.yield(nil, "idx"); return t.k[k] end,
+  __newindex = function (t,k,v) coroutine.yield(nil, "nidx"); t.k[k] = v end,
+}
+
+
+local function new (x)
+  return setmetatable({x = x, k = {}}, mt)
+end
+
+
+local a = new(10)
+local b = new(12)
+local c = new"hello"
+
+local function run (f, t)
+  local i = 1
+  local c = coroutine.wrap(f)
+  while true do
+    local res, stat = c()
+    if res then assert(t[i] == nil); return res, t end
+    assert(stat == t[i])
+    i = i + 1
+  end
+end
+
+
+assert(run(function () if (a>=b) then return '>=' else return '<' end end,
+       {"le", "sub"}) == "<")
+-- '<=' using '<'
+mt.__le = nil
+assert(run(function () if (a<=b) then return '<=' else return '>' end end,
+       {"lt"}) == "<=")
+assert(run(function () if (a==b) then return '==' else return '~=' end end,
+       {"eq"}) == "~=")
+
+assert(run(function () return a..b end, {"concat"}) == "1012")
+
+assert(run(function() return a .. b .. c .. a end,
+       {"concat", "concat", "concat"}) == "1012hello10")
+
+assert(run(function() return "a" .. "b" .. a .. "c" .. c .. b .. "x" end,
+       {"concat", "concat", "concat"}) == "ab10chello12x")
+
+assert(run(function ()
+             a.BB = print
+             return a.BB
+           end, {"nidx", "idx"}) == print)
+
+-- getuptable & setuptable
+do local _ENV = _ENV
+  f = function () AAA = BBB + 1; return AAA end
+end
+g = new(10); g.k.BBB = 10;
+debug.setupvalue(f, 1, g)
+assert(run(f, {"idx", "nidx", "idx"}) == 11)
+assert(g.k.AAA == 11)
+
+print"+"
+
+print"testing yields inside 'for' iterators"
+
+local f = function (s, i)
+      if i%2 == 0 then coroutine.yield(nil, "for") end
+      if i < s then return i + 1 end
+    end
+
+assert(run(function ()
+             local s = 0
+             for i in f, 4, 0 do s = s + i end
+             return s
+           end, {"for", "for", "for"}) == 10)
+
+
+
+-- tests for coroutine API
+if T==nil then
+  (Message or print)('\a\n >>> testC not active: skipping coroutine API tests <<<\n\a')
+  return
+end
+
+print('testing coroutine API')
+
+local function apico (...)
+  local x = {...}
+  return coroutine.wrap(function ()
+    return T.testC(table.unpack(x))
+  end)
+end
+
+local a = {apico(
+[[
+  pushstring errorcode
+  pcallk 1 0 2;
+  invalid command (should not arrive here)
+]],
+[[getctx; gettop; return .]],
+"stackmark",
+error
+)()}
+assert(#a == 6 and
+       a[3] == "stackmark" and
+       a[4] == "errorcode" and
+       a[5] == "ERRRUN" and
+       a[6] == 2)       -- 'ctx' to pcallk
+
+local co = apico(
+  "pushvalue 2; pushnum 10; pcallk 1 2 3; invalid command;",
+  coroutine.yield,
+  "getctx; pushvalue 2; pushstring a; pcallk 1 0 4; invalid command",
+  "getctx; gettop; return .")
+
+assert(co() == 10)
+assert(co(20, 30) == 'a')
+a = {co()}
+assert(#a == 10 and
+       a[2] == coroutine.yield and
+       a[5] == 20 and a[6] == 30 and
+       a[7] == "YIELD" and a[8] == 3 and
+       a[9] == "YIELD" and a[10] == 4)
+assert(not pcall(co))   -- coroutine is dead now
+
+
+f = T.makeCfunc("pushnum 3; pushnum 5; yield 1;")
+co = coroutine.wrap(function ()
+  assert(f() == 23); assert(f() == 23); return 10
+end)
+assert(co(23,16) == 5)
+assert(co(23,16) == 5)
+assert(co(23,16) == 10)
+
+
+-- testing coroutines with C bodies
+f = T.makeCfunc([[
+        pushnum 102
+	yieldk	1 U2
+	return 2
+]],
+[[
+	pushnum 23   # continuation
+	gettop
+	return .
+]])
+
+x = coroutine.wrap(f)
+assert(x() == 102)
+assert(x() == 23)
+
+
+f = T.makeCfunc[[pushstring 'a'; pushnum 102; yield 2; ]]
+
+a, b, c, d = T.testC([[newthread; pushvalue 2; xmove 0 3 1; resume 3 0;
+                       pushstatus; xmove 3 0 0;  resume 3 0; pushstatus;
+                       return 4; ]], f)
+
+assert(a == 'YIELD' and b == 'a' and c == 102 and d == 'OK')
+
+
+-- testing chain of suspendable C calls
+
+local count = 3   -- number of levels
+
+f = T.makeCfunc([[
+  remove 1;             # remove argument
+  pushvalue U3;         # get selection function
+  call 0 1;             # call it  (result is 'f' or 'yield')
+  pushstring hello      # single argument for selected function
+  pushupvalueindex 2;   # index of continuation program
+  callk 1 -1 .;		# call selected function
+  errorerror		# should never arrive here
+]],
+[[
+  # continuation program
+  pushnum 34	# return value
+  gettop
+  return .     # return all results
+]],
+function ()     -- selection function
+  count = count - 1
+  if count == 0 then return coroutine.yield
+  else return f
+  end
+end
+)
+
+co = coroutine.wrap(function () return f(nil) end)
+assert(co() == "hello")   -- argument to 'yield'
+a = {co()}
+-- three '34's (one from each pending C call)
+assert(#a == 3 and a[1] == a[2] and a[2] == a[3] and a[3] == 34)
+
+
+-- testing yields with continuations
+
+co = coroutine.wrap(function (...) return
+       T.testC([[
+          getctx
+          yieldk 3 2
+          nonexec error
+       ]],
+       [[  # continuation
+         getctx
+         yieldk 2 3 
+       ]],
+       [[  # continuation
+         getctx
+         yieldk 2 4 
+       ]],
+       [[  # continuation
+          pushvalue 6; pushnum 10; pushnum 20;
+          pcall 2 0     # call should throw an error and execution continues
+          pop 1		# remove error message
+          pushvalue 6
+          getctx
+          pcallk 2 2 5  # call should throw an error and jump to continuation
+          cannot be here!
+       ]],
+       [[  # continuation
+         gettop
+         return .
+       ]],
+       function (a,b)  x=a; y=b; error("errmsg") end,
+       ...
+)
+end)
+
+local a = {co(3,4,6)}; assert(a[1] == 6 and a[2] == "OK" and a[3] == 0)
+a = {co()}; assert(a[1] == "YIELD" and a[2] == 2)
+a = {co()}; assert(a[1] == "YIELD" and a[2] == 3)
+a = {co(7,8)};
+-- original arguments
+assert(type(a[1]) == 'string' and type(a[2]) == 'string' and
+     type(a[3]) == 'string' and type(a[4]) == 'string' and
+     type(a[5]) == 'string' and type(a[6]) == 'function')
+-- arguments left from fist resume
+assert(a[7] == 3 and a[8] == 4)
+-- arguments to last resume
+assert(a[9] == 7 and a[10] == 8)
+-- error message and nothing more
+assert(a[11]:find("errmsg") and #a == 11)
+-- check arguments to pcallk
+assert(x == "YIELD" and y == 4)
+
+assert(not pcall(co))   -- coroutine should be dead
+
+-- testing ctx
+
+a,b = T.testC(
+       [[ pushstring print; pcallk 0 0 12    # error
+          getctx; return 2 ]])
+assert(a == "OK" and b == 0)   -- no ctx outside continuations
+
+
+-- bug in nCcalls
+local co = coroutine.wrap(function ()
+  local a = {pcall(pcall,pcall,pcall,pcall,pcall,pcall,pcall,error,"hi")}
+  return pcall(assert, table.unpack(a))
+end)
+
+local a = {co()}
+assert(a[10] == "hi")
+
+
+print'OK'

tests/Lua.Tests/tests-lua/db.lua

@@ -0,0 +1,631 @@
+-- testing debug library
+
+debug = require "debug"
+
+local function dostring(s) return assert(load(s))() end
+
+print"testing debug library and debug information"
+
+do
+local a=1
+end
+
+function test (s, l, p)
+  collectgarbage()   -- avoid gc during trace
+  local function f (event, line)
+    assert(event == 'line')
+    local l = table.remove(l, 1)
+    if p then print(l, line) end
+    assert(l == line, "wrong trace!!")
+  end
+  debug.sethook(f,"l"); load(s)(); debug.sethook()
+  assert(#l == 0)
+end
+
+
+do
+  assert(not pcall(debug.getinfo, print, "X"))   -- invalid option
+  assert(debug.getinfo(1000) == nil)   -- out of range level
+  assert(debug.getinfo(-1) == nil)     -- out of range level
+  local a = debug.getinfo(print)
+  assert(a.what == "C" and a.short_src == "[C]")
+  a = debug.getinfo(print, "L")
+  assert(a.activelines == nil)
+  local b = debug.getinfo(test, "SfL")
+  assert(b.name == nil and b.what == "Lua" and b.linedefined == 13 and
+         b.lastlinedefined == b.linedefined + 10 and
+         b.func == test and not string.find(b.short_src, "%["))
+  assert(b.activelines[b.linedefined + 1] and
+         b.activelines[b.lastlinedefined])
+  assert(not b.activelines[b.linedefined] and
+         not b.activelines[b.lastlinedefined + 1])
+end
+
+
+-- test file and string names truncation
+a = "function f () end"
+local function dostring (s, x) return load(s, x)() end
+dostring(a)
+assert(debug.getinfo(f).short_src == string.format('[string "%s"]', a))
+dostring(a..string.format("; %s\n=1", string.rep('p', 400)))
+assert(string.find(debug.getinfo(f).short_src, '^%[string [^\n]*%.%.%."%]$'))
+dostring(a..string.format("; %s=1", string.rep('p', 400)))
+assert(string.find(debug.getinfo(f).short_src, '^%[string [^\n]*%.%.%."%]$'))
+dostring("\n"..a)
+assert(debug.getinfo(f).short_src == '[string "..."]')
+dostring(a, "")
+assert(debug.getinfo(f).short_src == '[string ""]')
+dostring(a, "@xuxu")
+assert(debug.getinfo(f).short_src == "xuxu")
+dostring(a, "@"..string.rep('p', 1000)..'t')
+assert(string.find(debug.getinfo(f).short_src, "^%.%.%.p*t$"))
+dostring(a, "=xuxu")
+assert(debug.getinfo(f).short_src == "xuxu")
+dostring(a, string.format("=%s", string.rep('x', 500)))
+assert(string.find(debug.getinfo(f).short_src, "^x*$"))
+dostring(a, "=")
+assert(debug.getinfo(f).short_src == "")
+a = nil; f = nil;
+
+
+repeat
+  local g = {x = function ()
+    local a = debug.getinfo(2)
+    assert(a.name == 'f' and a.namewhat == 'local')
+    a = debug.getinfo(1)
+    assert(a.name == 'x' and a.namewhat == 'field')
+    return 'xixi'
+  end}
+  local f = function () return 1+1 and (not 1 or g.x()) end
+  assert(f() == 'xixi')
+  g = debug.getinfo(f)
+  assert(g.what == "Lua" and g.func == f and g.namewhat == "" and not g.name)
+
+  function f (x, name)   -- local!
+    name = name or 'f'
+    local a = debug.getinfo(1)
+    assert(a.name == name and a.namewhat == 'local')
+    return x
+  end
+
+  -- breaks in different conditions
+  if 3>4 then break end; f()
+  if 3<4 then a=1 else break end; f()
+  while 1 do local x=10; break end; f()
+  local b = 1
+  if 3>4 then return math.sin(1) end; f()
+  a = 3<4; f()
+  a = 3<4 or 1; f()
+  repeat local x=20; if 4>3 then f() else break end; f() until 1
+  g = {}
+  f(g).x = f(2) and f(10)+f(9)
+  assert(g.x == f(19))
+  function g(x) if not x then return 3 end return (x('a', 'x')) end
+  assert(g(f) == 'a')
+until 1
+
+test([[if
+math.sin(1)
+then
+  a=1
+else
+  a=2
+end
+]], {2,3,4,7})
+
+test([[--
+if nil then
+  a=1
+else
+  a=2
+end
+]], {2,5,6})
+
+test([[a=1
+repeat
+  a=a+1
+until a==3
+]], {1,3,4,3,4})
+
+test([[ do
+  return
+end
+]], {2})
+
+test([[local a
+a=1
+while a<=3 do
+  a=a+1
+end
+]], {1,2,3,4,3,4,3,4,3,5})
+
+test([[while math.sin(1) do
+  if math.sin(1)
+  then break
+  end
+end
+a=1]], {1,2,3,6})
+
+test([[for i=1,3 do
+  a=i
+end
+]], {1,2,1,2,1,2,1,3})
+
+test([[for i,v in pairs{'a','b'} do
+  a=i..v
+end
+]], {1,2,1,2,1,3})
+
+test([[for i=1,4 do a=1 end]], {1,1,1,1,1})
+
+
+
+print'+'
+
+-- invalid levels in [gs]etlocal
+assert(not pcall(debug.getlocal, 20, 1))
+assert(not pcall(debug.setlocal, -1, 1, 10))
+
+
+-- parameter names
+local function foo (a,b,...) local d, e end
+local co = coroutine.create(foo)
+
+assert(debug.getlocal(foo, 1) == 'a')
+assert(debug.getlocal(foo, 2) == 'b')
+assert(debug.getlocal(foo, 3) == nil)
+assert(debug.getlocal(co, foo, 1) == 'a')
+assert(debug.getlocal(co, foo, 2) == 'b')
+assert(debug.getlocal(co, foo, 3) == nil)
+
+assert(debug.getlocal(print, 1) == nil)
+
+
+-- varargs
+local function foo (a, ...)
+  local t = table.pack(...)
+  for i = 1, t.n do
+    local n, v = debug.getlocal(1, -i)
+    assert(n == "(*vararg)" and v == t[i])
+  end
+  assert(not debug.getlocal(1, -(t.n + 1)))
+  assert(not debug.setlocal(1, -(t.n + 1), 30))
+  if t.n > 0 then
+    (function (x)
+      assert(debug.setlocal(2, -1, x) == "(*vararg)")
+      assert(debug.setlocal(2, -t.n, x) == "(*vararg)")
+     end)(430)
+     assert(... == 430)
+  end
+end
+
+foo()
+foo(print)
+foo(200, 3, 4)
+local a = {}
+for i = 1,1000 do a[i] = i end
+foo(table.unpack(a))
+a = nil
+
+-- access to vararg in non-vararg function
+local function foo () return debug.getlocal(1, -1) end
+assert(foo(10) == nil)
+
+
+a = {}; L = nil
+local glob = 1
+local oldglob = glob
+debug.sethook(function (e,l)
+  collectgarbage()   -- force GC during a hook
+  local f, m, c = debug.gethook()
+  assert(m == 'crl' and c == 0)
+  if e == "line" then
+    if glob ~= oldglob then
+      L = l-1   -- get the first line where "glob" has changed
+      oldglob = glob
+    end
+  elseif e == "call" then
+      local f = debug.getinfo(2, "f").func
+      a[f] = 1
+  else assert(e == "return")
+  end
+end, "crl")
+
+
+function f(a,b)
+  collectgarbage()
+  local _, x = debug.getlocal(1, 1)
+  local _, y = debug.getlocal(1, 2)
+  assert(x == a and y == b)
+  assert(debug.setlocal(2, 3, "pera") == "AA".."AA")
+  assert(debug.setlocal(2, 4, "maçã") == "B")
+  x = debug.getinfo(2)
+  assert(x.func == g and x.what == "Lua" and x.name == 'g' and
+         x.nups == 1 and string.find(x.source, "^@.*db%.lua$"))
+  glob = glob+1
+  assert(debug.getinfo(1, "l").currentline == L+1)
+  assert(debug.getinfo(1, "l").currentline == L+2)
+end
+
+function foo()
+  glob = glob+1
+  assert(debug.getinfo(1, "l").currentline == L+1)
+end; foo()  -- set L
+-- check line counting inside strings and empty lines
+
+_ = 'alo\
+alo' .. [[
+
+]]
+--[[
+]]
+assert(debug.getinfo(1, "l").currentline == L+11)  -- check count of lines
+
+
+function g(...)
+  local arg = {...}
+  do local a,b,c; a=math.sin(40); end
+  local feijao
+  local AAAA,B = "xuxu", "mamão"
+  f(AAAA,B)
+  assert(AAAA == "pera" and B == "maçã")
+  do
+     local B = 13
+     local x,y = debug.getlocal(1,5)
+     assert(x == 'B' and y == 13)
+  end
+end
+
+g()
+
+
+assert(a[f] and a[g] and a[assert] and a[debug.getlocal] and not a[print])
+
+
+-- tests for manipulating non-registered locals (C and Lua temporaries)
+
+local n, v = debug.getlocal(0, 1)
+assert(v == 0 and n == "(*temporary)")
+local n, v = debug.getlocal(0, 2)
+assert(v == 2 and n == "(*temporary)")
+assert(not debug.getlocal(0, 3))
+assert(not debug.getlocal(0, 0))
+
+function f()
+  assert(select(2, debug.getlocal(2,3)) == 1)
+  assert(not debug.getlocal(2,4))
+  debug.setlocal(2, 3, 10)
+  return 20
+end
+
+function g(a,b) return (a+1) + f() end
+
+assert(g(0,0) == 30)
+ 
+
+debug.sethook(nil);
+assert(debug.gethook() == nil)
+
+
+-- testing access to function arguments
+
+X = nil
+a = {}
+function a:f (a, b, ...) local arg = {...}; local c = 13 end
+debug.sethook(function (e)
+  assert(e == "call")
+  dostring("XX = 12")  -- test dostring inside hooks
+  -- testing errors inside hooks
+  assert(not pcall(load("a='joao'+1")))
+  debug.sethook(function (e, l) 
+    assert(debug.getinfo(2, "l").currentline == l)
+    local f,m,c = debug.gethook()
+    assert(e == "line")
+    assert(m == 'l' and c == 0)
+    debug.sethook(nil)  -- hook is called only once
+    assert(not X)       -- check that
+    X = {}; local i = 1
+    local x,y
+    while 1 do
+      x,y = debug.getlocal(2, i)
+      if x==nil then break end
+      X[x] = y
+      i = i+1
+    end
+  end, "l")
+end, "c")
+
+a:f(1,2,3,4,5)
+assert(X.self == a and X.a == 1   and X.b == 2 and X.c == nil)
+assert(XX == 12)
+assert(debug.gethook() == nil)
+
+
+-- testing upvalue access
+local function getupvalues (f)
+  local t = {}
+  local i = 1
+  while true do
+    local name, value = debug.getupvalue(f, i)
+    if not name then break end
+    assert(not t[name])
+    t[name] = value
+    i = i + 1
+  end
+  return t
+end
+
+local a,b,c = 1,2,3
+local function foo1 (a) b = a; return c end
+local function foo2 (x) a = x; return c+b end
+assert(debug.getupvalue(foo1, 3) == nil)
+assert(debug.getupvalue(foo1, 0) == nil)
+assert(debug.setupvalue(foo1, 3, "xuxu") == nil)
+local t = getupvalues(foo1)
+assert(t.a == nil and t.b == 2 and t.c == 3)
+t = getupvalues(foo2)
+assert(t.a == 1 and t.b == 2 and t.c == 3)
+assert(debug.setupvalue(foo1, 1, "xuxu") == "b")
+assert(({debug.getupvalue(foo2, 3)})[2] == "xuxu")
+-- upvalues of C functions are allways "called" "" (the empty string)
+assert(debug.getupvalue(string.gmatch("x", "x"), 1) == "")  
+
+
+-- testing count hooks
+local a=0
+debug.sethook(function (e) a=a+1 end, "", 1)
+a=0; for i=1,1000 do end; assert(1000 < a and a < 1012)
+debug.sethook(function (e) a=a+1 end, "", 4)
+a=0; for i=1,1000 do end; assert(250 < a and a < 255)
+local f,m,c = debug.gethook()
+assert(m == "" and c == 4)
+debug.sethook(function (e) a=a+1 end, "", 4000)
+a=0; for i=1,1000 do end; assert(a == 0)
+
+if not _no32 then
+  debug.sethook(print, "", 2^24 - 1)   -- count upperbound
+  local f,m,c = debug.gethook()
+  assert(({debug.gethook()})[3] == 2^24 - 1)
+end
+
+debug.sethook()
+
+
+-- tests for tail calls
+local function f (x)
+  if x then
+    assert(debug.getinfo(1, "S").what == "Lua")
+    assert(debug.getinfo(1, "t").istailcall == true)
+    local tail = debug.getinfo(2)
+    assert(tail.func == g1 and tail.istailcall == true)
+    assert(debug.getinfo(3, "S").what == "main")
+    print"+"
+    end
+end
+
+function g(x) return f(x) end
+
+function g1(x) g(x) end
+
+local function h (x) local f=g1; return f(x) end
+
+h(true)
+
+local b = {}
+debug.sethook(function (e) table.insert(b, e) end, "cr")
+h(false)
+debug.sethook()
+local res = {"return",   -- first return (from sethook)
+  "call", "tail call", "call", "tail call",
+  "return", "return",
+  "call",    -- last call (to sethook)
+}
+for i = 1, #res do assert(res[i] == table.remove(b, 1)) end
+
+b = 0
+debug.sethook(function (e)
+                if e == "tail call" then
+                  b = b + 1
+                  assert(debug.getinfo(2, "t").istailcall == true)
+                else
+                  assert(debug.getinfo(2, "t").istailcall == false)
+                end
+              end, "c")
+h(false)
+debug.sethook()
+assert(b == 2)   -- two tail calls
+
+lim = 30000
+if _soft then limit = 3000 end
+local function foo (x)
+  if x==0 then
+    assert(debug.getinfo(2).what == "main")
+    local info = debug.getinfo(1)
+    assert(info.istailcall == true and info.func == foo)
+  else return foo(x-1)
+  end
+end
+
+foo(lim)
+
+
+print"+"
+
+
+-- testing local function information
+co = load[[
+  local A = function ()
+    return x
+  end
+  return
+]]
+
+local a = 0
+-- 'A' should be visible to debugger only after its complete definition
+debug.sethook(function (e, l)
+  if l == 3 then a = a + 1; assert(debug.getlocal(2, 1) == "(*temporary)")
+  elseif l == 4 then a = a + 1; assert(debug.getlocal(2, 1) == "A")
+  end
+end, "l")
+co()  -- run local function definition
+debug.sethook()  -- turn off hook
+assert(a == 2)   -- ensure all two lines where hooked
+
+-- testing traceback
+
+assert(debug.traceback(print) == print)
+assert(debug.traceback(print, 4) == print)
+assert(string.find(debug.traceback("hi", 4), "^hi\n"))
+assert(string.find(debug.traceback("hi"), "^hi\n"))
+assert(not string.find(debug.traceback("hi"), "'traceback'"))
+assert(string.find(debug.traceback("hi", 0), "'traceback'"))
+assert(string.find(debug.traceback(), "^stack traceback:\n"))
+
+
+-- testing nparams, nups e isvararg
+local t = debug.getinfo(print, "u")
+assert(t.isvararg == true and t.nparams == 0 and t.nups == 0)
+
+t = debug.getinfo(function (a,b,c) end, "u")
+assert(t.isvararg == false and t.nparams == 3 and t.nups == 0)
+
+t = debug.getinfo(function (a,b,...) return t[a] end, "u")
+assert(t.isvararg == true and t.nparams == 2 and t.nups == 1)
+
+t = debug.getinfo(1)   -- main
+assert(t.isvararg == true and t.nparams == 0 and t.nups == 1 and
+       debug.getupvalue(t.func, 1) == "_ENV")
+
+
+-- testing debugging of coroutines
+
+local function checktraceback (co, p, level)
+  local tb = debug.traceback(co, nil, level)
+  local i = 0
+  for l in string.gmatch(tb, "[^\n]+\n?") do
+    assert(i == 0 or string.find(l, p[i]))
+    i = i+1
+  end
+  assert(p[i] == nil)
+end
+
+
+local function f (n)
+  if n > 0 then f(n-1)
+  else coroutine.yield() end
+end
+
+local co = coroutine.create(f)
+coroutine.resume(co, 3)
+checktraceback(co, {"yield", "db.lua", "db.lua", "db.lua", "db.lua"})
+checktraceback(co, {"db.lua", "db.lua", "db.lua", "db.lua"}, 1)
+checktraceback(co, {"db.lua", "db.lua", "db.lua"}, 2)
+checktraceback(co, {"db.lua"}, 4)
+checktraceback(co, {}, 40)
+
+
+co = coroutine.create(function (x)
+       local a = 1
+       coroutine.yield(debug.getinfo(1, "l"))
+       coroutine.yield(debug.getinfo(1, "l").currentline)
+       return a
+     end)
+
+local tr = {}
+local foo = function (e, l) if l then table.insert(tr, l) end end
+debug.sethook(co, foo, "lcr")
+
+local _, l = coroutine.resume(co, 10)
+local x = debug.getinfo(co, 1, "lfLS")
+assert(x.currentline == l.currentline and x.activelines[x.currentline])
+assert(type(x.func) == "function")
+for i=x.linedefined + 1, x.lastlinedefined do
+  assert(x.activelines[i])
+  x.activelines[i] = nil
+end
+assert(next(x.activelines) == nil)   -- no 'extra' elements
+assert(debug.getinfo(co, 2) == nil)
+local a,b = debug.getlocal(co, 1, 1)
+assert(a == "x" and b == 10)
+a,b = debug.getlocal(co, 1, 2)
+assert(a == "a" and b == 1)
+debug.setlocal(co, 1, 2, "hi")
+assert(debug.gethook(co) == foo)
+assert(#tr == 2 and
+       tr[1] == l.currentline-1 and tr[2] == l.currentline)
+
+a,b,c = pcall(coroutine.resume, co)
+assert(a and b and c == l.currentline+1)
+checktraceback(co, {"yield", "in function <"})
+
+a,b = coroutine.resume(co)
+assert(a and b == "hi")
+assert(#tr == 4 and tr[4] == l.currentline+2)
+assert(debug.gethook(co) == foo)
+assert(debug.gethook() == nil)
+checktraceback(co, {})
+
+
+-- check traceback of suspended (or dead with error) coroutines
+
+function f(i) if i==0 then error(i) else coroutine.yield(); f(i-1) end end
+
+co = coroutine.create(function (x) f(x) end)
+a, b = coroutine.resume(co, 3)
+t = {"'yield'", "'f'", "in function <"}
+while coroutine.status(co) == "suspended" do
+  checktraceback(co, t)
+  a, b = coroutine.resume(co)
+  table.insert(t, 2, "'f'")   -- one more recursive call to 'f'
+end
+t[1] = "'error'"
+checktraceback(co, t)
+
+
+-- test acessing line numbers of a coroutine from a resume inside
+-- a C function (this is a known bug in Lua 5.0)
+
+local function g(x)
+    coroutine.yield(x)
+end
+
+local function f (i)
+  debug.sethook(function () end, "l")
+  for j=1,1000 do
+    g(i+j)
+  end
+end
+
+local co = coroutine.wrap(f)
+co(10)
+pcall(co)
+pcall(co)
+
+
+assert(type(debug.getregistry()) == "table")
+
+
+-- test tagmethod information
+local a = {}
+local function f (t)
+  local info = debug.getinfo(1);
+  assert(info.namewhat == "metamethod")
+  a.op = info.name
+  return info.name
+end
+setmetatable(a, {
+  __index = f; __add = f; __div = f; __mod = f; __concat = f; __pow = f;
+  __eq = f; __le = f; __lt = f;
+})
+
+local b = setmetatable({}, getmetatable(a))
+
+assert(a[3] == "__index" and a^3 == "__pow" and a..a == "__concat")
+assert(a/3 == "__div" and 3%a == "__mod")
+assert (a==b and a.op == "__eq")
+assert (a>=b and a.op == "__le")
+assert (a>b and a.op == "__lt")
+
+
+print"OK"
+

tests/Lua.Tests/tests-lua/errors.lua

@@ -0,0 +1,422 @@
+print("testing errors")
+
+local debug = require"debug"
+
+-- avoid problems with 'strict' module (which may generate other error messages)
+local mt = getmetatable(_G) or {}
+local oldmm = mt.__index
+mt.__index = nil
+
+function doit (s)
+  local f, msg = load(s)
+  if f == nil then return msg end
+  local cond, msg = pcall(f)
+  return (not cond) and msg
+end
+
+
+function checkmessage (prog, msg)
+  local m = doit(prog)
+  assert(string.find(m, msg, 1, true))
+end
+
+function checksyntax (prog, extra, token, line)
+  local msg = doit(prog)
+  if not string.find(token, "^<%a") and not string.find(token, "^char%(")
+    then token = "'"..token.."'" end
+  token = string.gsub(token, "(%p)", "%%%1")
+  local pt = string.format([[^%%[string ".*"%%]:%d: .- near %s$]],
+                           line, token)
+  assert(string.find(msg, pt))
+  assert(string.find(msg, msg, 1, true))
+end
+
+
+-- test error message with no extra info
+assert(doit("error('hi', 0)") == 'hi')
+
+-- test error message with no info
+assert(doit("error()") == nil)
+
+
+-- test common errors/errors that crashed in the past
+if not _no32 then
+  assert(doit("table.unpack({}, 1, n=2^30)"))
+end
+assert(doit("a=math.sin()"))
+assert(not doit("tostring(1)") and doit("tostring()"))
+assert(doit"tonumber()")
+assert(doit"repeat until 1; a")
+assert(doit"return;;")
+assert(doit"assert(false)")
+assert(doit"assert(nil)")
+assert(doit("function a (... , ...) end"))
+assert(doit("function a (, ...) end"))
+assert(doit("local t={}; t = t[#t] + 1"))
+
+checksyntax([[
+  local a = {4
+
+]], "'}' expected (to close '{' at line 1)", "<eof>", 3)
+
+
+-- tests for better error messages
+
+checkmessage("a=1; bbbb=2; a=math.sin(3)+bbbb(3)", "global 'bbbb'")
+checkmessage("a=1; local a,bbbb=2,3; a = math.sin(1) and bbbb(3)",
+       "local 'bbbb'")
+checkmessage("a={}; do local a=1 end a:bbbb(3)", "method 'bbbb'")
+checkmessage("local a={}; a.bbbb(3)", "field 'bbbb'")
+assert(not string.find(doit"a={13}; local bbbb=1; a[bbbb](3)", "'bbbb'"))
+checkmessage("a={13}; local bbbb=1; a[bbbb](3)", "number")
+checkmessage("a=(1)..{}", "a table value")
+
+aaa = nil
+checkmessage("aaa.bbb:ddd(9)", "global 'aaa'")
+checkmessage("local aaa={bbb=1}; aaa.bbb:ddd(9)", "field 'bbb'")
+checkmessage("local aaa={bbb={}}; aaa.bbb:ddd(9)", "method 'ddd'")
+checkmessage("local a,b,c; (function () a = b+1 end)()", "upvalue 'b'")
+assert(not doit"local aaa={bbb={ddd=next}}; aaa.bbb:ddd(nil)")
+
+checkmessage("local _ENV = {x={}}; a = a + 1", "global 'a'")
+
+checkmessage("b=1; local aaa='a'; x=aaa+b", "local 'aaa'")
+checkmessage("aaa={}; x=3/aaa", "global 'aaa'")
+checkmessage("aaa='2'; b=nil;x=aaa*b", "global 'b'")
+checkmessage("aaa={}; x=-aaa", "global 'aaa'")
+assert(not string.find(doit"aaa={}; x=(aaa or aaa)+(aaa and aaa)", "'aaa'"))
+assert(not string.find(doit"aaa={}; (aaa or aaa)()", "'aaa'"))
+
+checkmessage("print(print < 10)", "function")
+checkmessage("print(print < print)", "two function")
+
+
+-- passing light userdata instead of full userdata
+_G.D = debug
+checkmessage([[
+  -- create light udata
+  local x = D.upvalueid(function () return debug end, 1)
+  D.setuservalue(x, {})
+]], "light userdata")
+_G.D = nil
+
+
+-- global functions
+checkmessage("(io.write or print){}", "io.write")
+checkmessage("(collectgarbage or print){}", "collectgarbage")
+
+-- tests for field accesses after RK limit
+local t = {}
+for i = 1, 1000 do
+  t[i] = "a = x" .. i
+end
+local s = table.concat(t, "; ")
+t = nil
+checkmessage(s.."; a = bbb + 1", "global 'bbb'")
+checkmessage("local _ENV=_ENV;"..s.."; a = bbb + 1", "global 'bbb'")
+checkmessage(s.."; local t = {}; a = t.bbb + 1", "field 'bbb'")
+checkmessage(s.."; local t = {}; t:bbb()", "method 'bbb'")
+
+checkmessage([[aaa=9
+repeat until 3==3
+local x=math.sin(math.cos(3))
+if math.sin(1) == x then return math.sin(1) end   -- tail call
+local a,b = 1, {
+  {x='a'..'b'..'c', y='b', z=x},
+  {1,2,3,4,5} or 3+3<=3+3,
+  3+1>3+1,
+  {d = x and aaa[x or y]}}
+]], "global 'aaa'")
+
+checkmessage([[
+local x,y = {},1
+if math.sin(1) == 0 then return 3 end    -- return
+x.a()]], "field 'a'")
+
+checkmessage([[
+prefix = nil
+insert = nil
+while 1 do
+  local a
+  if nil then break end
+  insert(prefix, a)
+end]], "global 'insert'")
+
+checkmessage([[  -- tail call
+  return math.sin("a")
+]], "'sin'")
+
+checkmessage([[collectgarbage("nooption")]], "invalid option")
+
+checkmessage([[x = print .. "a"]], "concatenate")
+
+checkmessage("getmetatable(io.stdin).__gc()", "no value")
+
+checkmessage([[
+local Var
+local function main()
+  NoSuchName (function() Var=0 end)
+end
+main()
+]], "global 'NoSuchName'")
+print'+'
+
+a = {}; setmetatable(a, {__index = string})
+checkmessage("a:sub()", "bad self")
+checkmessage("string.sub('a', {})", "#2")
+checkmessage("('a'):sub{}", "#1")
+
+checkmessage("table.sort({1,2,3}, table.sort)", "'table.sort'")
+-- next message may be 'setmetatable' or '_G.setmetatable'
+checkmessage("string.gsub('s', 's', setmetatable)", "setmetatable'")
+
+-- tests for errors in coroutines
+
+function f (n)
+  local c = coroutine.create(f)
+  local a,b = coroutine.resume(c)
+  return b
+end
+assert(string.find(f(), "C stack overflow"))
+
+checkmessage("coroutine.yield()", "outside a coroutine")
+
+f1 = function () table.sort({1,2,3}, coroutine.yield) end
+f = coroutine.wrap(function () return pcall(f1) end)
+assert(string.find(select(2, f()), "yield across"))
+
+
+-- testing size of 'source' info; size of buffer for that info is
+-- LUA_IDSIZE, declared as 60 in luaconf. Get one position for '\0'.
+idsize = 60 - 1
+local function checksize (source)
+  -- syntax error
+  local _, msg = load("x", source)
+  msg = string.match(msg, "^([^:]*):")   -- get source (1st part before ':')
+  assert(msg:len() <= idsize)
+end
+
+for i = 60 - 10, 60 + 10 do   -- check border cases around 60
+  checksize("@" .. string.rep("x", i))   -- file names
+  checksize(string.rep("x", i - 10))     -- string sources
+  checksize("=" .. string.rep("x", i))   -- exact sources
+end
+
+
+-- testing line error
+
+local function lineerror (s, l)
+  local err,msg = pcall(load(s))
+  local line = string.match(msg, ":(%d+):")
+  assert((line and line+0) == l)
+end
+
+lineerror("local a\n for i=1,'a' do \n print(i) \n end", 2)
+lineerror("\n local a \n for k,v in 3 \n do \n print(k) \n end", 3)
+lineerror("\n\n for k,v in \n 3 \n do \n print(k) \n end", 4)
+lineerror("function a.x.y ()\na=a+1\nend", 1)
+
+lineerror("a = \na\n+\n{}", 3)
+lineerror("a = \n3\n+\n(\n4\n/\nprint)", 6)
+lineerror("a = \nprint\n+\n(\n4\n/\n7)", 3)
+
+lineerror("a\n=\n-\n\nprint\n;", 3)
+
+lineerror([[
+a
+(
+23)
+]], 1)
+
+lineerror([[
+local a = {x = 13}
+a
+.
+x
+(
+23
+)
+]], 2)
+
+lineerror([[
+local a = {x = 13}
+a
+.
+x
+(
+23 + a
+)
+]], 6)
+
+local p = [[
+function g() f() end
+function f(x) error('a', X) end
+g()
+]]
+X=3;lineerror((p), 3)
+X=0;lineerror((p), nil)
+X=1;lineerror((p), 2)
+X=2;lineerror((p), 1)
+
+
+if not _soft then
+  -- several tests that exaust the Lua stack
+  C = 0
+  local l = debug.getinfo(1, "l").currentline; function y () C=C+1; y() end
+
+  local function checkstackmessage (m)
+    return (string.find(m, "^.-:%d+: stack overflow"))
+  end
+  -- repeated stack overflows (to check stack recovery)
+  assert(checkstackmessage(doit('y()')))
+  print('+')
+  assert(checkstackmessage(doit('y()')))
+  print('+')
+  assert(checkstackmessage(doit('y()')))
+  print('+')
+
+
+  -- error lines in stack overflow
+  C = 0
+  local l1
+  local function g(x)
+    l1 = debug.getinfo(x, "l").currentline; y()
+  end
+  local _, stackmsg = xpcall(g, debug.traceback, 1)
+  print('+')
+  local stack = {}
+  for line in string.gmatch(stackmsg, "[^\n]*") do
+    local curr = string.match(line, ":(%d+):")
+    if curr then table.insert(stack, tonumber(curr)) end
+  end
+  local i=1
+  while stack[i] ~= l1 do
+    assert(stack[i] == l)
+    i = i+1
+  end
+  assert(i > 15)
+
+
+  -- error in error handling
+  local res, msg = xpcall(error, error)
+  assert(not res and type(msg) == 'string')
+  print('+')
+
+  local function f (x)
+    if x==0 then error('a\n')
+    else
+      local aux = function () return f(x-1) end
+      local a,b = xpcall(aux, aux)
+      return a,b
+    end
+  end
+  f(3)
+
+  local function loop (x,y,z) return 1 + loop(x, y, z) end
+ 
+  local res, msg = xpcall(loop, function (m)
+    assert(string.find(m, "stack overflow"))
+    local res, msg = pcall(loop)
+    assert(string.find(msg, "error handling"))
+    assert(math.sin(0) == 0)
+    return 15
+  end)
+  assert(msg == 15)
+
+  res, msg = pcall(function ()
+    for i = 999900, 1000000, 1 do table.unpack({}, 1, i) end
+  end)
+  assert(string.find(msg, "too many results"))
+
+end
+
+
+-- non string messages
+function f() error{msg='x'} end
+res, msg = xpcall(f, function (r) return {msg=r.msg..'y'} end)
+assert(msg.msg == 'xy')
+
+-- xpcall with arguments
+a, b, c = xpcall(string.find, error, "alo", "al")
+assert(a and b == 1 and c == 2)
+a, b, c = xpcall(string.find, function (x) return {} end, true, "al")
+assert(not a and type(b) == "table" and c == nil)
+
+print('+')
+checksyntax("syntax error", "", "error", 1)
+checksyntax("1.000", "", "1.000", 1)
+checksyntax("[[a]]", "", "[[a]]", 1)
+checksyntax("'aa'", "", "'aa'", 1)
+
+-- test 255 as first char in a chunk
+checksyntax("\255a = 1", "", "char(255)", 1)
+
+doit('I = load("a=9+"); a=3')
+assert(a==3 and I == nil)
+print('+')
+
+lim = 1000
+if _soft then lim = 100 end
+for i=1,lim do
+  doit('a = ')
+  doit('a = 4+nil')
+end
+
+
+-- testing syntax limits
+local function testrep (init, rep)
+  local s = "local a; "..init .. string.rep(rep, 400)
+  local a,b = load(s)
+  assert(not a and string.find(b, "levels"))
+end
+testrep("a=", "{")
+testrep("a=", "(")
+testrep("", "a(")
+testrep("", "do ")
+testrep("", "while a do ")
+testrep("", "if a then else ")
+testrep("", "function foo () ")
+testrep("a=", "a..")
+testrep("a=", "a^")
+
+local s = ("a,"):rep(200).."a=nil"
+local a,b = load(s)
+assert(not a and string.find(b, "levels"))
+
+
+-- testing other limits
+-- upvalues
+local lim = 127
+local  s = "local function fooA ()\n  local "
+for j = 1,lim do
+  s = s.."a"..j..", "
+end
+s = s.."b,c\n"
+s = s.."local function fooB ()\n  local "
+for j = 1,lim do
+  s = s.."b"..j..", "
+end
+s = s.."b\n"
+s = s.."function fooC () return b+c"
+local c = 1+2
+for j = 1,lim do
+  s = s.."+a"..j.."+b"..j
+  c = c + 2
+end
+s = s.."\nend  end end"
+local a,b = load(s)
+assert(c > 255 and string.find(b, "too many upvalues") and
+       string.find(b, "line 5"))
+
+-- local variables
+s = "\nfunction foo ()\n  local "
+for j = 1,300 do
+  s = s.."a"..j..", "
+end
+s = s.."b\n"
+local a,b = load(s)
+assert(string.find(b, "line 2"))
+
+mt.__index = oldmm
+
+print('OK')

tests/Lua.Tests/tests-lua/events.lua

@@ -0,0 +1,388 @@
+print('testing metatables')
+
+X = 20; B = 30
+
+_ENV = setmetatable({}, {__index=_G})
+
+collectgarbage()
+
+X = X+10
+assert(X == 30 and _G.X == 20)
+B = false
+assert(B == false)
+B = nil
+assert(B == 30)
+
+assert(getmetatable{} == nil)
+assert(getmetatable(4) == nil)
+assert(getmetatable(nil) == nil)
+a={}; setmetatable(a, {__metatable = "xuxu",
+                    __tostring=function(x) return x.name end})
+assert(getmetatable(a) == "xuxu")
+assert(tostring(a) == nil)
+-- cannot change a protected metatable
+assert(pcall(setmetatable, a, {}) == false)
+a.name = "gororoba"
+assert(tostring(a) == "gororoba")
+
+local a, t = {10,20,30; x="10", y="20"}, {}
+assert(setmetatable(a,t) == a)
+assert(getmetatable(a) == t)
+assert(setmetatable(a,nil) == a)
+assert(getmetatable(a) == nil)
+assert(setmetatable(a,t) == a)
+
+
+function f (t, i, e)
+  assert(not e)
+  local p = rawget(t, "parent")
+  return (p and p[i]+3), "dummy return"
+end
+
+t.__index = f
+
+a.parent = {z=25, x=12, [4] = 24}
+assert(a[1] == 10 and a.z == 28 and a[4] == 27 and a.x == "10")
+
+collectgarbage()
+
+a = setmetatable({}, t)
+function f(t, i, v) rawset(t, i, v-3) end
+setmetatable(t, t)   -- causes a bug in 5.1 !
+t.__newindex = f
+a[1] = 30; a.x = "101"; a[5] = 200
+assert(a[1] == 27 and a.x == 98 and a[5] == 197)
+
+
+local c = {}
+a = setmetatable({}, t)
+t.__newindex = c
+a[1] = 10; a[2] = 20; a[3] = 90
+assert(c[1] == 10 and c[2] == 20 and c[3] == 90)
+
+
+do
+  local a;
+  a = setmetatable({}, {__index = setmetatable({},
+                     {__index = setmetatable({},
+                     {__index = function (_,n) return a[n-3]+4, "lixo" end})})})
+  a[0] = 20
+  for i=0,10 do
+    assert(a[i*3] == 20 + i*4)
+  end
+end
+
+
+do  -- newindex
+  local foi
+  local a = {}
+  for i=1,10 do a[i] = 0; a['a'..i] = 0; end
+  setmetatable(a, {__newindex = function (t,k,v) foi=true; rawset(t,k,v) end})
+  foi = false; a[1]=0; assert(not foi)
+  foi = false; a['a1']=0; assert(not foi)
+  foi = false; a['a11']=0; assert(foi)
+  foi = false; a[11]=0; assert(foi)
+  foi = false; a[1]=nil; assert(not foi)
+  foi = false; a[1]=nil; assert(foi)
+end
+
+
+setmetatable(t, nil)
+function f (t, ...) return t, {...} end
+t.__call = f
+
+do
+  local x,y = a(table.unpack{'a', 1})
+  assert(x==a and y[1]=='a' and y[2]==1 and y[3]==nil)
+  x,y = a()
+  assert(x==a and y[1]==nil)
+end
+
+
+local b = setmetatable({}, t)
+setmetatable(b,t)
+
+function f(op)
+  return function (...) cap = {[0] = op, ...} ; return (...) end
+end
+t.__add = f("add")
+t.__sub = f("sub")
+t.__mul = f("mul")
+t.__div = f("div")
+t.__mod = f("mod")
+t.__unm = f("unm")
+t.__pow = f("pow")
+t.__len = f("len")
+
+assert(b+5 == b)
+assert(cap[0] == "add" and cap[1] == b and cap[2] == 5 and cap[3]==nil)
+assert(b+'5' == b)
+assert(cap[0] == "add" and cap[1] == b and cap[2] == '5' and cap[3]==nil)
+assert(5+b == 5)
+assert(cap[0] == "add" and cap[1] == 5 and cap[2] == b and cap[3]==nil)
+assert('5'+b == '5')
+assert(cap[0] == "add" and cap[1] == '5' and cap[2] == b and cap[3]==nil)
+b=b-3; assert(getmetatable(b) == t)
+assert(5-a == 5)
+assert(cap[0] == "sub" and cap[1] == 5 and cap[2] == a and cap[3]==nil)
+assert('5'-a == '5')
+assert(cap[0] == "sub" and cap[1] == '5' and cap[2] == a and cap[3]==nil)
+assert(a*a == a)
+assert(cap[0] == "mul" and cap[1] == a and cap[2] == a and cap[3]==nil)
+assert(a/0 == a)
+assert(cap[0] == "div" and cap[1] == a and cap[2] == 0 and cap[3]==nil)
+assert(a%2 == a)
+assert(cap[0] == "mod" and cap[1] == a and cap[2] == 2 and cap[3]==nil)
+assert(-a == a)
+assert(cap[0] == "unm" and cap[1] == a)
+assert(a^4 == a)
+assert(cap[0] == "pow" and cap[1] == a and cap[2] == 4 and cap[3]==nil)
+assert(a^'4' == a)
+assert(cap[0] == "pow" and cap[1] == a and cap[2] == '4' and cap[3]==nil)
+assert(4^a == 4)
+assert(cap[0] == "pow" and cap[1] == 4 and cap[2] == a and cap[3]==nil)
+assert('4'^a == '4')
+assert(cap[0] == "pow" and cap[1] == '4' and cap[2] == a and cap[3]==nil)
+assert(#a == a)
+assert(cap[0] == "len" and cap[1] == a)
+
+
+-- test for rawlen
+t = setmetatable({1,2,3}, {__len = function () return 10 end})
+assert(#t == 10 and rawlen(t) == 3)
+assert(rawlen"abc" == 3)
+assert(not pcall(rawlen, io.stdin))
+assert(not pcall(rawlen, 34))
+assert(not pcall(rawlen))
+
+t = {}
+t.__lt = function (a,b,c)
+  collectgarbage()
+  assert(c == nil)
+  if type(a) == 'table' then a = a.x end
+  if type(b) == 'table' then b = b.x end
+ return a<b, "dummy"
+end
+
+function Op(x) return setmetatable({x=x}, t) end
+
+local function test ()
+  assert(not(Op(1)<Op(1)) and (Op(1)<Op(2)) and not(Op(2)<Op(1)))
+  assert(not(1 < Op(1)) and (Op(1) < 2) and not(2 < Op(1)))
+  assert(not(Op('a')<Op('a')) and (Op('a')<Op('b')) and not(Op('b')<Op('a')))
+  assert(not('a' < Op('a')) and (Op('a') < 'b') and not(Op('b') < Op('a')))
+  assert((Op(1)<=Op(1)) and (Op(1)<=Op(2)) and not(Op(2)<=Op(1)))
+  assert((Op('a')<=Op('a')) and (Op('a')<=Op('b')) and not(Op('b')<=Op('a')))
+  assert(not(Op(1)>Op(1)) and not(Op(1)>Op(2)) and (Op(2)>Op(1)))
+  assert(not(Op('a')>Op('a')) and not(Op('a')>Op('b')) and (Op('b')>Op('a')))
+  assert((Op(1)>=Op(1)) and not(Op(1)>=Op(2)) and (Op(2)>=Op(1)))
+  assert((1 >= Op(1)) and not(1 >= Op(2)) and (Op(2) >= 1))
+  assert((Op('a')>=Op('a')) and not(Op('a')>=Op('b')) and (Op('b')>=Op('a')))
+  assert(('a' >= Op('a')) and not(Op('a') >= 'b') and (Op('b') >= Op('a')))
+end
+
+test()
+
+t.__le = function (a,b,c)
+  assert(c == nil)
+  if type(a) == 'table' then a = a.x end
+  if type(b) == 'table' then b = b.x end
+ return a<=b, "dummy"
+end
+
+test()  -- retest comparisons, now using both `lt' and `le'
+
+
+-- test `partial order'
+
+local function Set(x)
+  local y = {}
+  for _,k in pairs(x) do y[k] = 1 end
+  return setmetatable(y, t)
+end
+
+t.__lt = function (a,b)
+  for k in pairs(a) do
+    if not b[k] then return false end
+    b[k] = nil
+  end
+  return next(b) ~= nil
+end
+
+t.__le = nil
+
+assert(Set{1,2,3} < Set{1,2,3,4})
+assert(not(Set{1,2,3,4} < Set{1,2,3,4}))
+assert((Set{1,2,3,4} <= Set{1,2,3,4}))
+assert((Set{1,2,3,4} >= Set{1,2,3,4}))
+assert((Set{1,3} <= Set{3,5}))   -- wrong!! model needs a `le' method ;-)
+
+t.__le = function (a,b)
+  for k in pairs(a) do
+    if not b[k] then return false end
+  end
+  return true
+end
+
+assert(not (Set{1,3} <= Set{3,5}))   -- now its OK!
+assert(not(Set{1,3} <= Set{3,5}))
+assert(not(Set{1,3} >= Set{3,5}))
+
+t.__eq = function (a,b)
+  for k in pairs(a) do
+    if not b[k] then return false end
+    b[k] = nil
+  end
+  return next(b) == nil
+end
+
+local s = Set{1,3,5}
+assert(s == Set{3,5,1})
+assert(not rawequal(s, Set{3,5,1}))
+assert(rawequal(s, s))
+assert(Set{1,3,5,1} == Set{3,5,1})
+assert(Set{1,3,5} ~= Set{3,5,1,6})
+t[Set{1,3,5}] = 1
+assert(t[Set{1,3,5}] == nil)   -- `__eq' is not valid for table accesses
+
+
+t.__concat = function (a,b,c)
+  assert(c == nil)
+  if type(a) == 'table' then a = a.val end
+  if type(b) == 'table' then b = b.val end
+  if A then return a..b
+  else
+    return setmetatable({val=a..b}, t)
+  end
+end
+
+c = {val="c"}; setmetatable(c, t)
+d = {val="d"}; setmetatable(d, t)
+
+A = true
+assert(c..d == 'cd')
+assert(0 .."a".."b"..c..d.."e".."f"..(5+3).."g" == "0abcdef8g")
+
+A = false
+assert((c..d..c..d).val == 'cdcd')
+x = c..d
+assert(getmetatable(x) == t and x.val == 'cd')
+x = 0 .."a".."b"..c..d.."e".."f".."g"
+assert(x.val == "0abcdefg")
+
+
+-- concat metamethod x numbers (bug in 5.1.1)
+c = {}
+local x
+setmetatable(c, {__concat = function (a,b)
+  assert(type(a) == "number" and b == c or type(b) == "number" and a == c)
+  return c
+end})
+assert(c..5 == c and 5 .. c == c)
+assert(4 .. c .. 5 == c and 4 .. 5 .. 6 .. 7 .. c == c)
+
+
+-- test comparison compatibilities
+local t1, t2, c, d
+t1 = {};  c = {}; setmetatable(c, t1)
+d = {}
+t1.__eq = function () return true end
+t1.__lt = function () return true end
+setmetatable(d, t1)
+assert(c == d and c < d and not(d <= c))
+t2 = {}
+t2.__eq = t1.__eq
+t2.__lt = t1.__lt
+setmetatable(d, t2)
+assert(c == d and c < d and not(d <= c))
+
+
+
+-- test for several levels of calls
+local i
+local tt = {
+  __call = function (t, ...)
+    i = i+1
+    if t.f then return t.f(...)
+    else return {...}
+    end
+  end
+}
+
+local a = setmetatable({}, tt)
+local b = setmetatable({f=a}, tt)
+local c = setmetatable({f=b}, tt)
+
+i = 0
+x = c(3,4,5)
+assert(i == 3 and x[1] == 3 and x[3] == 5)
+
+
+assert(_G.X == 20)
+
+print'+'
+
+local _g = _G
+_ENV = setmetatable({}, {__index=function (_,k) return _g[k] end})
+
+
+a = {}
+rawset(a, "x", 1, 2, 3)
+assert(a.x == 1 and rawget(a, "x", 3) == 1)
+
+print '+'
+
+-- testing metatables for basic types
+local debug = require'debug'
+mt = {}
+debug.setmetatable(10, mt)
+assert(getmetatable(-2) == mt)
+mt.__index = function (a,b) return a+b end
+assert((10)[3] == 13)
+assert((10)["3"] == 13)
+debug.setmetatable(23, nil)
+assert(getmetatable(-2) == nil)
+
+debug.setmetatable(true, mt)
+assert(getmetatable(false) == mt)
+mt.__index = function (a,b) return a or b end
+assert((true)[false] == true)
+assert((false)[false] == false)
+debug.setmetatable(false, nil)
+assert(getmetatable(true) == nil)
+
+debug.setmetatable(nil, mt)
+assert(getmetatable(nil) == mt)
+mt.__add = function (a,b) return (a or 0) + (b or 0) end
+assert(10 + nil == 10)
+assert(nil + 23 == 23)
+assert(nil + nil == 0)
+debug.setmetatable(nil, nil)
+assert(getmetatable(nil) == nil)
+
+debug.setmetatable(nil, {})
+
+
+-- loops in delegation
+a = {}; setmetatable(a, a); a.__index = a; a.__newindex = a
+assert(not pcall(function (a,b) return a[b] end, a, 10))
+assert(not pcall(function (a,b,c) a[b] = c end, a, 10, true))
+
+-- bug in 5.1
+T, K, V = nil
+grandparent = {}
+grandparent.__newindex = function(t,k,v) T=t; K=k; V=v end
+
+parent = {}
+parent.__newindex = parent
+setmetatable(parent, grandparent)
+
+child = setmetatable({}, parent)
+child.foo = 10      --> CRASH (on some machines)
+assert(T == parent and K == "foo" and V == 10)
+
+print 'OK'
+
+return 12
+
+

tests/Lua.Tests/tests-lua/files.lua

@@ -0,0 +1,615 @@
+debug = require "debug"
+
+assert(type(os.getenv"PATH") == "string")
+
+assert(io.input(io.stdin) == io.stdin)
+assert(not pcall(io.input, "non-existent-file"))
+assert(io.output(io.stdout) == io.stdout)
+
+-- cannot close standard files
+assert(not io.close(io.stdin) and
+       not io.stdout:close() and
+       not io.stderr:close())
+
+
+assert(type(io.input()) == "userdata" and io.type(io.output()) == "file")
+assert(type(io.stdin) == "userdata" and io.type(io.stderr) == "file")
+assert(io.type(8) == nil)
+local a = {}; setmetatable(a, {})
+assert(io.type(a) == nil)
+
+local a,b,c = io.open('xuxu_nao_existe')
+assert(not a and type(b) == "string" and type(c) == "number")
+
+a,b,c = io.open('/a/b/c/d', 'w')
+assert(not a and type(b) == "string" and type(c) == "number")
+
+local file = os.tmpname()
+local f, msg = io.open(file, "w")
+if not f then
+  (Message or print)("'os.tmpname' file cannot be open; skipping file tests")
+
+else  --{  most tests here need tmpname
+f:close()
+
+print('testing i/o')
+
+local otherfile = os.tmpname()
+
+assert(not pcall(io.open, file, "rw"))     -- invalid mode
+assert(not pcall(io.open, file, "rb+"))    -- invalid mode
+assert(not pcall(io.open, file, "r+bk"))   -- invalid mode
+assert(not pcall(io.open, file, ""))       -- invalid mode
+assert(not pcall(io.open, file, "+"))      -- invalid mode
+assert(not pcall(io.open, file, "b"))      -- invalid mode
+assert(io.open(file, "r+b")):close()
+assert(io.open(file, "r+")):close()
+assert(io.open(file, "rb")):close()
+
+assert(os.setlocale('C', 'all'))
+
+io.input(io.stdin); io.output(io.stdout);
+
+os.remove(file)
+assert(loadfile(file) == nil)
+assert(io.open(file) == nil)
+io.output(file)
+assert(io.output() ~= io.stdout)
+
+assert(io.output():seek() == 0)
+assert(io.write("alo alo"):seek() == string.len("alo alo"))
+assert(io.output():seek("cur", -3) == string.len("alo alo")-3)
+assert(io.write("joao"))
+assert(io.output():seek("end") == string.len("alo joao"))
+
+assert(io.output():seek("set") == 0)
+
+assert(io.write('"álo"', "{a}\n", "second line\n", "third line \n"))
+assert(io.write('çfourth_line'))
+io.output(io.stdout)
+collectgarbage()  -- file should be closed by GC
+assert(io.input() == io.stdin and rawequal(io.output(), io.stdout))
+print('+')
+
+-- test GC for files
+collectgarbage()
+for i=1,120 do
+  for i=1,5 do
+    io.input(file)
+    assert(io.open(file, 'r'))
+    io.lines(file)
+  end
+  collectgarbage()
+end
+
+io.input():close()
+io.close()
+
+assert(os.rename(file, otherfile))
+assert(os.rename(file, otherfile) == nil)
+
+io.output(io.open(otherfile, "ab"))
+assert(io.write("\n\n\t\t  3450\n"));
+io.close()
+
+-- test line generators
+assert(not pcall(io.lines, "non-existent-file"))
+assert(os.rename(otherfile, file))
+io.output(otherfile)
+local f = io.lines(file)
+while f() do end;
+assert(not pcall(f))  -- read lines after EOF
+assert(not pcall(f))  -- read lines after EOF
+-- copy from file to otherfile
+for l in io.lines(file) do io.write(l, "\n") end
+io.close()
+-- copy from otherfile back to file
+local f = assert(io.open(otherfile))
+assert(io.type(f) == "file")
+io.output(file)
+assert(io.output():read() == nil)
+for l in f:lines() do io.write(l, "\n") end
+assert(tostring(f):sub(1, 5) == "file ")
+assert(f:close()); io.close()
+assert(not pcall(io.close, f))   -- error trying to close again
+assert(tostring(f) == "file (closed)")
+assert(io.type(f) == "closed file")
+io.input(file)
+f = io.open(otherfile):lines()
+for l in io.lines() do assert(l == f()) end
+f = nil; collectgarbage()
+assert(os.remove(otherfile))
+
+io.input(file)
+do  -- test error returns
+  local a,b,c = io.input():write("xuxu")
+  assert(not a and type(b) == "string" and type(c) == "number")
+end
+assert(io.read(0) == "")   -- not eof
+assert(io.read(5, '*l') == '"álo"')
+assert(io.read(0) == "")
+assert(io.read() == "second line")
+local x = io.input():seek()
+assert(io.read() == "third line ")
+assert(io.input():seek("set", x))
+assert(io.read('*L') == "third line \n")
+assert(io.read(1) == "ç")
+assert(io.read(string.len"fourth_line") == "fourth_line")
+assert(io.input():seek("cur", -string.len"fourth_line"))
+assert(io.read() == "fourth_line")
+assert(io.read() == "")  -- empty line
+assert(io.read('*n') == 3450)
+assert(io.read(1) == '\n')
+assert(io.read(0) == nil)  -- end of file
+assert(io.read(1) == nil)  -- end of file
+assert(io.read(30000) == nil)  -- end of file
+assert(({io.read(1)})[2] == nil)
+assert(io.read() == nil)  -- end of file
+assert(({io.read()})[2] == nil)
+assert(io.read('*n') == nil)  -- end of file
+assert(({io.read('*n')})[2] == nil)
+assert(io.read('*a') == '')  -- end of file (OK for `*a')
+assert(io.read('*a') == '')  -- end of file (OK for `*a')
+collectgarbage()
+print('+')
+io.close(io.input())
+assert(not pcall(io.read))
+
+assert(os.remove(file))
+
+local t = '0123456789'
+for i=1,12 do t = t..t; end
+assert(string.len(t) == 10*2^12)
+
+io.output(file)
+io.write("alo"):write("\n")
+io.close()
+assert(not pcall(io.write))
+local f = io.open(file, "a+b")
+io.output(f)
+collectgarbage()
+
+assert(io.write(' ' .. t .. ' '))
+assert(io.write(';', 'end of file\n'))
+f:flush(); io.flush()
+f:close()
+print('+')
+
+io.input(file)
+assert(io.read() == "alo")
+assert(io.read(1) == ' ')
+assert(io.read(string.len(t)) == t)
+assert(io.read(1) == ' ')
+assert(io.read(0))
+assert(io.read('*a') == ';end of file\n')
+assert(io.read(0) == nil)
+assert(io.close(io.input()))
+
+
+-- test errors in read/write
+do
+  local function ismsg (m)
+    -- error message is not a code number
+    return (type(m) == "string" and tonumber(m) == nil)
+  end
+
+  -- read
+  local f = io.open(file, "w")
+  local r, m, c = f:read()
+  assert(r == nil and ismsg(m) and type(c) == "number")
+  assert(f:close())
+  -- write
+  f = io.open(file, "r")
+  r, m, c = f:write("whatever")
+  assert(r == nil and ismsg(m) and type(c) == "number")
+  assert(f:close())
+  -- lines
+  f = io.open(file, "w")
+  r, m = pcall(f:lines())
+  assert(r == false and ismsg(m))
+  assert(f:close())
+end
+
+assert(os.remove(file))
+
+-- test for *L format
+io.output(file); io.write"\n\nline\nother":close()
+io.input(file)
+assert(io.read"*L" == "\n")
+assert(io.read"*L" == "\n")
+assert(io.read"*L" == "line\n")
+assert(io.read"*L" == "other")
+assert(io.read"*L" == nil)
+io.input():close()
+
+local f = assert(io.open(file))
+local s = ""
+for l in f:lines("*L") do s = s .. l end
+assert(s == "\n\nline\nother")
+f:close()
+
+io.input(file)
+s = ""
+for l in io.lines(nil, "*L") do s = s .. l end
+assert(s == "\n\nline\nother")
+io.input():close()
+
+s = ""
+for l in io.lines(file, "*L") do s = s .. l end
+assert(s == "\n\nline\nother")
+
+s = ""
+for l in io.lines(file, "*l") do s = s .. l end
+assert(s == "lineother")
+
+io.output(file); io.write"a = 10 + 34\na = 2*a\na = -a\n":close()
+local t = {}
+load(io.lines(file, "*L"), nil, nil, t)()
+assert(t.a == -((10 + 34) * 2))
+
+
+-- test for multipe arguments in 'lines'
+io.output(file); io.write"0123456789\n":close()
+for a,b in io.lines(file, 1, 1) do
+  if a == "\n" then assert(b == nil)
+  else assert(tonumber(a) == b - 1)
+  end
+end
+
+for a,b,c in io.lines(file, 1, 2, "*a") do
+  assert(a == "0" and b == "12" and c == "3456789\n")
+end
+
+for a,b,c in io.lines(file, "*a", 0, 1) do
+  if a == "" then break end
+  assert(a == "0123456789\n" and b == nil and c == nil)
+end
+collectgarbage()   -- to close file in previous iteration
+
+io.output(file); io.write"00\n10\n20\n30\n40\n":close()
+for a, b in io.lines(file, "*n", "*n") do
+  if a == 40 then assert(b == nil)
+  else assert(a == b - 10)
+  end
+end
+
+
+-- test load x lines
+io.output(file);
+io.write[[
+local y
+= X
+X =
+X *
+2 +
+X;
+X =
+X
+-                                   y;
+]]:close()
+_G.X = 1
+assert(not load(io.lines(file)))
+collectgarbage()   -- to close file in previous iteration
+load(io.lines(file, "*L"))()
+assert(_G.X == 2)
+load(io.lines(file, 1))()
+assert(_G.X == 4)
+load(io.lines(file, 3))()
+assert(_G.X == 8)
+
+print('+')
+
+local x1 = "string\n\n\\com \"\"''coisas [[estranhas]] ]]'"
+io.output(file)
+assert(io.write(string.format("x2 = %q\n-- comment without ending EOS", x1)))
+io.close()
+assert(loadfile(file))()
+assert(x1 == x2)
+print('+')
+assert(os.remove(file))
+assert(os.remove(file) == nil)
+assert(os.remove(otherfile) == nil)
+
+-- testing loadfile
+local function testloadfile (s, expres)
+  io.output(file)
+  if s then io.write(s) end
+  io.close()
+  local res = assert(loadfile(file))()
+  assert(os.remove(file))
+  assert(res == expres)
+end
+
+-- loading empty file
+testloadfile(nil, nil)
+
+-- loading file with initial comment without end of line
+testloadfile("# a non-ending comment", nil)
+
+
+-- checking Unicode BOM in files
+testloadfile("\xEF\xBB\xBF# some comment\nreturn 234", 234)
+testloadfile("\xEF\xBB\xBFreturn 239", 239)
+testloadfile("\xEF\xBB\xBF", nil)   -- empty file with a BOM
+
+
+-- checking line numbers in files with initial comments
+testloadfile("# a comment\nreturn debug.getinfo(1).currentline", 2)
+
+
+-- loading binary file
+io.output(io.open(file, "wb"))
+assert(io.write(string.dump(function () return 10, '\0alo\255', 'hi' end)))
+io.close()
+a, b, c = assert(loadfile(file))()
+assert(a == 10 and b == "\0alo\255" and c == "hi")
+assert(os.remove(file))
+
+-- bug in 5.2.1
+do
+  io.output(io.open(file, "wb"))
+  -- save function with no upvalues
+  assert(io.write(string.dump(function () return 1 end)))
+  io.close()
+  f = assert(loadfile(file, "b", {}))
+  assert(type(f) == "function" and f() == 1)
+  assert(os.remove(file))
+end
+
+-- loading binary file with initial comment
+io.output(io.open(file, "wb"))
+assert(io.write("#this is a comment for a binary file\0\n",
+                string.dump(function () return 20, '\0\0\0' end)))
+io.close()
+a, b, c = assert(loadfile(file))()
+assert(a == 20 and b == "\0\0\0" and c == nil)
+assert(os.remove(file))
+
+
+-- 'loadfile' with 'env'
+do
+  local f = io.open(file, 'w')
+  f:write[[
+    if (...) then a = 15; return b, c, d
+    else return _ENV
+    end
+  ]]
+  f:close()
+  local t = {b = 12, c = "xuxu", d = print}
+  local f = assert(loadfile(file, 't', t))
+  local b, c, d = f(1)
+  assert(t.a == 15 and b == 12 and c == t.c and d == print)
+  assert(f() == t)
+  f = assert(loadfile(file, 't', nil))
+  assert(f() == nil)
+  f = assert(loadfile(file))
+  assert(f() == _G)
+  assert(os.remove(file))
+end
+
+
+-- 'loadfile' x modes
+do
+  io.open(file, 'w'):write("return 10"):close()
+  local s, m = loadfile(file, 'b')
+  assert(not s and string.find(m, "a text chunk"))
+  io.open(file, 'w'):write("\27 return 10"):close()
+  local s, m = loadfile(file, 't')
+  assert(not s and string.find(m, "a binary chunk"))
+  assert(os.remove(file))
+end
+
+
+io.output(file)
+assert(io.write("qualquer coisa\n"))
+assert(io.write("mais qualquer coisa"))
+io.close()
+assert(io.output(assert(io.open(otherfile, 'wb')))
+       :write("outra coisa\0\1\3\0\0\0\0\255\0")
+       :close())
+
+local filehandle = assert(io.open(file, 'r+'))
+local otherfilehandle = assert(io.open(otherfile, 'rb'))
+assert(filehandle ~= otherfilehandle)
+assert(type(filehandle) == "userdata")
+assert(filehandle:read('*l') == "qualquer coisa")
+io.input(otherfilehandle)
+assert(io.read(string.len"outra coisa") == "outra coisa")
+assert(filehandle:read('*l') == "mais qualquer coisa")
+filehandle:close();
+assert(type(filehandle) == "userdata")
+io.input(otherfilehandle)
+assert(io.read(4) == "\0\1\3\0")
+assert(io.read(3) == "\0\0\0")
+assert(io.read(0) == "")        -- 255 is not eof
+assert(io.read(1) == "\255")
+assert(io.read('*a') == "\0")
+assert(not io.read(0))
+assert(otherfilehandle == io.input())
+otherfilehandle:close()
+assert(os.remove(file))
+assert(os.remove(otherfile))
+collectgarbage()
+
+io.output(file)
+  :write[[
+ 123.4	-56e-2  not a number
+second line
+third line
+
+and the rest of the file
+]]
+  :close()
+io.input(file)
+local _,a,b,c,d,e,h,__ = io.read(1, '*n', '*n', '*l', '*l', '*l', '*a', 10)
+assert(io.close(io.input()))
+assert(_ == ' ' and __ == nil)
+assert(type(a) == 'number' and a==123.4 and b==-56e-2)
+assert(d=='second line' and e=='third line')
+assert(h==[[
+
+and the rest of the file
+]])
+assert(os.remove(file))
+collectgarbage()
+
+-- testing buffers
+do
+  local f = assert(io.open(file, "w"))
+  local fr = assert(io.open(file, "r"))
+  assert(f:setvbuf("full", 2000))
+  f:write("x")
+  assert(fr:read("*all") == "")  -- full buffer; output not written yet
+  f:close()
+  fr:seek("set")
+  assert(fr:read("*all") == "x")   -- `close' flushes it
+  f = assert(io.open(file), "w")
+  assert(f:setvbuf("no"))
+  f:write("x")
+  fr:seek("set")
+  assert(fr:read("*all") == "x")  -- no buffer; output is ready
+  f:close()
+  f = assert(io.open(file, "a"))
+  assert(f:setvbuf("line"))
+  f:write("x")
+  fr:seek("set", 1)
+  assert(fr:read("*all") == "")   -- line buffer; no output without `\n'
+  f:write("a\n"):seek("set", 1)
+  assert(fr:read("*all") == "xa\n")  -- now we have a whole line
+  f:close(); fr:close()
+  assert(os.remove(file))
+end
+
+
+if not _soft then
+  print("testing large files (> BUFSIZ)")
+  io.output(file)
+  for i=1,5001 do io.write('0123456789123') end
+  io.write('\n12346'):close()
+  io.input(file)
+  local x = io.read('*a')
+  io.input():seek('set', 0)
+  local y = io.read(30001)..io.read(1005)..io.read(0)..
+            io.read(1)..io.read(100003)
+  assert(x == y and string.len(x) == 5001*13 + 6)
+  io.input():seek('set', 0)
+  y = io.read()  -- huge line
+  assert(x == y..'\n'..io.read())
+  assert(io.read() == nil)
+  io.close(io.input())
+  assert(os.remove(file))
+  x = nil; y = nil
+end
+
+if not _noposix then
+  print("testing popen/pclose and execute")
+  local tests = {
+    -- command,   what,  code
+    {"ls > /dev/null", "ok"},
+    {"not-to-be-found-command", "exit"},
+    {"exit 3", "exit", 3},
+    {"exit 129", "exit", 129},
+    {"kill -s HUP $$", "signal", 1},
+    {"kill -s KILL $$", "signal", 9},
+    {"sh -c 'kill -s HUP $$'", "exit"},
+    {'lua -e "os.exit(20, true)"', "exit", 20},
+  }
+  print("\n(some error messages are expected now)")
+  for _, v in ipairs(tests) do
+    local x, y, z = io.popen(v[1]):close()
+    local x1, y1, z1 = os.execute(v[1])
+    assert(x == x1 and y == y1 and z == z1)
+    if v[2] == "ok" then
+      assert(x == true and y == 'exit' and z == 0)
+    else
+      assert(x == nil and y == v[2])   -- correct status and 'what'
+      -- correct code if known (but always different from 0)
+      assert((v[3] == nil and z > 0) or v[3] == z)
+    end
+  end
+end
+
+
+-- testing tmpfile
+f = io.tmpfile()
+assert(io.type(f) == "file")
+f:write("alo")
+f:seek("set")
+assert(f:read"*a" == "alo")
+
+end --}
+
+print'+'
+
+
+assert(os.date("") == "")
+assert(os.date("!") == "")
+local x = string.rep("a", 10000)
+assert(os.date(x) == x)
+local t = os.time()
+D = os.date("*t", t)
+assert(os.date(string.rep("%d", 1000), t) ==
+       string.rep(os.date("%d", t), 1000))
+assert(os.date(string.rep("%", 200)) == string.rep("%", 100))
+
+local t = os.time()
+D = os.date("*t", t)
+load(os.date([[assert(D.year==%Y and D.month==%m and D.day==%d and
+  D.hour==%H and D.min==%M and D.sec==%S and
+  D.wday==%w+1 and D.yday==%j and type(D.isdst) == 'boolean')]], t))()
+
+assert(not pcall(os.date, "%9"))   -- invalid conversion specifier
+assert(not pcall(os.date, "%"))   -- invalid conversion specifier
+assert(not pcall(os.date, "%O"))   -- invalid conversion specifier
+assert(not pcall(os.date, "%E"))   -- invalid conversion specifier
+assert(not pcall(os.date, "%Ea"))   -- invalid conversion specifier
+
+if not _noposix then
+  assert(type(os.date("%Ex")) == 'string')
+  assert(type(os.date("%Oy")) == 'string')
+end
+
+assert(os.time(D) == t)
+assert(not pcall(os.time, {hour = 12}))
+
+D = os.date("!*t", t)
+load(os.date([[!assert(D.year==%Y and D.month==%m and D.day==%d and
+  D.hour==%H and D.min==%M and D.sec==%S and
+  D.wday==%w+1 and D.yday==%j and type(D.isdst) == 'boolean')]], t))()
+
+do
+  local D = os.date("*t")
+  local t = os.time(D)
+  assert(type(D.isdst) == 'boolean')
+  D.isdst = nil
+  local t1 = os.time(D)
+  assert(t == t1)   -- if isdst is absent uses correct default
+end
+
+t = os.time(D)
+D.year = D.year-1;
+local t1 = os.time(D)
+-- allow for leap years
+assert(math.abs(os.difftime(t,t1)/(24*3600) - 365) < 2)
+
+t = os.time()
+t1 = os.time(os.date("*t"))
+assert(os.difftime(t1,t) <= 2)
+
+local t1 = os.time{year=2000, month=10, day=1, hour=23, min=12}
+local t2 = os.time{year=2000, month=10, day=1, hour=23, min=10, sec=19}
+assert(os.difftime(t1,t2) == 60*2-19)
+
+io.output(io.stdout)
+local d = os.date('%d')
+local m = os.date('%m')
+local a = os.date('%Y')
+local ds = os.date('%w') + 1
+local h = os.date('%H')
+local min = os.date('%M')
+local s = os.date('%S')
+io.write(string.format('test done on %2.2d/%2.2d/%d', d, m, a))
+io.write(string.format(', at %2.2d:%2.2d:%2.2d\n', h, min, s))
+io.write(string.format('%s\n', _VERSION))
+
+

tests/Lua.Tests/tests-lua/gc.lua

@@ -0,0 +1,575 @@
+print('testing garbage collection')
+
+collectgarbage()
+
+assert(collectgarbage("isrunning"))
+
+local function gcinfo () return collectgarbage"count" * 1024 end
+
+
+-- test weird parameters
+do
+  -- save original parameters
+  local a = collectgarbage("setpause", 200)
+  local b = collectgarbage("setstepmul", 200)
+  local t = {0, 2, 10, 90, 500, 5000, 30000, 2^31 - 2}
+  for i = 1, #t do
+    local p = t[i]
+    for j = 1, #t do
+      local m = t[j]
+      collectgarbage("setpause", p)
+      collectgarbage("setstepmul", m)
+      collectgarbage("step", 0)
+      collectgarbage("step", 10000)
+    end
+  end
+  -- restore original parameters
+  collectgarbage("setpause", a)
+  collectgarbage("setstepmul", b)
+  collectgarbage()
+end
+
+
+_G["while"] = 234
+
+limit = 5000
+
+
+local function GC1 ()
+  local u
+  local b     -- must be declared after 'u' (to be above it in the stack)
+  local finish = false
+  u = setmetatable({}, {__gc = function () finish = true end})
+  b = {34}
+  repeat u = {} until finish
+  assert(b[1] == 34)   -- 'u' was collected, but 'b' was not
+
+  finish = false; local i = 1
+  u = setmetatable({}, {__gc = function () finish = true end})
+  repeat i = i + 1; u = i .. i until finish
+  assert(b[1] == 34)   -- 'u' was collected, but 'b' was not
+
+  finish = false
+  u = setmetatable({}, {__gc = function () finish = true end})
+  repeat local i; u = function () return i end until finish
+  assert(b[1] == 34)   -- 'u' was collected, but 'b' was not
+end
+
+local function GC()  GC1(); GC1() end
+
+
+contCreate = 0
+
+print('tables')
+while contCreate <= limit do
+  local a = {}; a = nil
+  contCreate = contCreate+1
+end
+
+a = "a"
+
+contCreate = 0
+print('strings')
+while contCreate <= limit do
+  a = contCreate .. "b";
+  a = string.gsub(a, '(%d%d*)', string.upper)
+  a = "a"
+  contCreate = contCreate+1
+end
+
+
+contCreate = 0
+
+a = {}
+
+print('functions')
+function a:test ()
+  while contCreate <= limit do
+    load(string.format("function temp(a) return 'a%d' end", contCreate))()
+    assert(temp() == string.format('a%d', contCreate))
+    contCreate = contCreate+1
+  end
+end
+
+a:test()
+
+-- collection of functions without locals, globals, etc.
+do local f = function () end end
+
+
+print("functions with errors")
+prog = [[
+do
+  a = 10;
+  function foo(x,y)
+    a = sin(a+0.456-0.23e-12);
+    return function (z) return sin(%x+z) end
+  end
+  local x = function (w) a=a+w; end
+end
+]]
+do
+  local step = 1
+  if _soft then step = 13 end
+  for i=1, string.len(prog), step do
+    for j=i, string.len(prog), step do
+      pcall(load(string.sub(prog, i, j)))
+    end
+  end
+end
+
+foo = nil
+print('long strings')
+x = "01234567890123456789012345678901234567890123456789012345678901234567890123456789"
+assert(string.len(x)==80)
+s = ''
+n = 0
+k = 300
+while n < k do s = s..x; n=n+1; j=tostring(n)  end
+assert(string.len(s) == k*80)
+s = string.sub(s, 1, 20000)
+s, i = string.gsub(s, '(%d%d%d%d)', math.sin)
+assert(i==20000/4)
+s = nil
+x = nil
+
+assert(_G["while"] == 234)
+
+local k,b = collectgarbage("count")
+assert(k*1024 == math.floor(k)*1024 + b)
+
+print("steps")
+
+local bytes = gcinfo()
+while 1 do
+  local nbytes = gcinfo()
+  if nbytes < bytes then break end   -- run until gc
+  bytes = nbytes
+  a = {}
+end
+
+print("steps (2)")
+
+local function dosteps (siz)
+  assert(not collectgarbage("isrunning"))
+  collectgarbage()
+  assert(not collectgarbage("isrunning"))
+  local a = {}
+  for i=1,100 do a[i] = {{}}; local b = {} end
+  local x = gcinfo()
+  local i = 0
+  repeat   -- do steps until it completes a collection cycle
+    i = i+1
+  until collectgarbage("step", siz)
+  assert(gcinfo() < x)
+  return i
+end
+
+collectgarbage"stop"
+
+if not _port then
+  -- test the "size" of basic GC steps (whatever they mean...)
+  assert(dosteps(0) > 10)
+  assert(dosteps(10) < dosteps(2))
+end
+
+-- collector should do a full collection with so many steps
+assert(dosteps(100000) == 1)
+assert(collectgarbage("step", 1000000) == true)
+assert(collectgarbage("step", 1000000) == true)
+
+assert(not collectgarbage("isrunning"))
+collectgarbage"restart"
+assert(collectgarbage("isrunning"))
+
+
+if not _port then
+  -- test the pace of the collector
+  collectgarbage(); collectgarbage()
+  local x = gcinfo()
+  collectgarbage"stop"
+  assert(not collectgarbage("isrunning"))
+  repeat
+    local a = {}
+  until gcinfo() > 3 * x
+  collectgarbage"restart"
+  assert(collectgarbage("isrunning"))
+  repeat
+    local a = {}
+  until gcinfo() <= x * 2
+end
+
+
+print("clearing tables")
+lim = 15
+a = {}
+-- fill a with `collectable' indices
+for i=1,lim do a[{}] = i end
+b = {}
+for k,v in pairs(a) do b[k]=v end
+-- remove all indices and collect them
+for n in pairs(b) do
+  a[n] = nil
+  assert(type(n) == 'table' and next(n) == nil)
+  collectgarbage()
+end
+b = nil
+collectgarbage()
+for n in pairs(a) do error'cannot be here' end
+for i=1,lim do a[i] = i end
+for i=1,lim do assert(a[i] == i) end
+
+
+print('weak tables')
+a = {}; setmetatable(a, {__mode = 'k'});
+-- fill a with some `collectable' indices
+for i=1,lim do a[{}] = i end
+-- and some non-collectable ones
+for i=1,lim do a[i] = i end
+for i=1,lim do local s=string.rep('@', i); a[s] = s..'#' end
+collectgarbage()
+local i = 0
+for k,v in pairs(a) do assert(k==v or k..'#'==v); i=i+1 end
+assert(i == 2*lim)
+
+a = {}; setmetatable(a, {__mode = 'v'});
+a[1] = string.rep('b', 21)
+collectgarbage()
+assert(a[1])   -- strings are *values*
+a[1] = nil
+-- fill a with some `collectable' values (in both parts of the table)
+for i=1,lim do a[i] = {} end
+for i=1,lim do a[i..'x'] = {} end
+-- and some non-collectable ones
+for i=1,lim do local t={}; a[t]=t end
+for i=1,lim do a[i+lim]=i..'x' end
+collectgarbage()
+local i = 0
+for k,v in pairs(a) do assert(k==v or k-lim..'x' == v); i=i+1 end
+assert(i == 2*lim)
+
+a = {}; setmetatable(a, {__mode = 'vk'});
+local x, y, z = {}, {}, {}
+-- keep only some items
+a[1], a[2], a[3] = x, y, z
+a[string.rep('$', 11)] = string.rep('$', 11)
+-- fill a with some `collectable' values
+for i=4,lim do a[i] = {} end
+for i=1,lim do a[{}] = i end
+for i=1,lim do local t={}; a[t]=t end
+collectgarbage()
+assert(next(a) ~= nil)
+local i = 0
+for k,v in pairs(a) do
+  assert((k == 1 and v == x) or
+         (k == 2 and v == y) or
+         (k == 3 and v == z) or k==v);
+  i = i+1
+end
+assert(i == 4)
+x,y,z=nil
+collectgarbage()
+assert(next(a) == string.rep('$', 11))
+
+
+-- 'bug' in 5.1
+a = {}
+local t = {x = 10}
+local C = setmetatable({key = t}, {__mode = 'v'})
+local C1 = setmetatable({[t] = 1}, {__mode = 'k'})
+a.x = t  -- this should not prevent 't' from being removed from
+         -- weak table 'C' by the time 'a' is finalized
+
+setmetatable(a, {__gc = function (u)
+                          assert(C.key == nil)
+                          assert(type(next(C1)) == 'table')
+                          end})
+
+a, t = nil
+collectgarbage()
+collectgarbage()
+assert(next(C) == nil and next(C1) == nil)
+C, C1 = nil
+
+
+-- ephemerons
+local mt = {__mode = 'k'}
+a = {10,20,30,40}; setmetatable(a, mt)
+x = nil
+for i = 1, 100 do local n = {}; a[n] = {k = {x}}; x = n end
+GC()
+local n = x
+local i = 0
+while n do n = a[n].k[1]; i = i + 1 end
+assert(i == 100)
+x = nil
+GC()
+for i = 1, 4 do assert(a[i] == i * 10); a[i] = nil end
+assert(next(a) == nil)
+
+local K = {}
+a[K] = {}
+for i=1,10 do a[K][i] = {}; a[a[K][i]] = setmetatable({}, mt) end
+x = nil
+local k = 1
+for j = 1,100 do
+  local n = {}; local nk = k%10 + 1
+  a[a[K][nk]][n] = {x, k = k}; x = n; k = nk
+end
+GC()
+local n = x
+local i = 0
+while n do local t = a[a[K][k]][n]; n = t[1]; k = t.k; i = i + 1 end
+assert(i == 100)
+K = nil
+GC()
+assert(next(a) == nil)
+
+
+-- testing errors during GC
+do
+collectgarbage("stop")   -- stop collection
+local u = {}
+local s = {}; setmetatable(s, {__mode = 'k'})
+setmetatable(u, {__gc = function (o)
+  local i = s[o]
+  s[i] = true
+  assert(not s[i - 1])   -- check proper finalization order
+  if i == 8 then error("here") end   -- error during GC
+end})
+
+for i = 6, 10 do
+  local n = setmetatable({}, getmetatable(u))
+  s[n] = i
+end
+
+assert(not pcall(collectgarbage))
+for i = 8, 10 do assert(s[i]) end
+
+for i = 1, 5 do
+  local n = setmetatable({}, getmetatable(u))
+  s[n] = i
+end
+
+collectgarbage()
+for i = 1, 10 do assert(s[i]) end
+
+getmetatable(u).__gc = false
+
+
+-- __gc errors with non-string messages
+setmetatable({}, {__gc = function () error{} end})
+local a, b = pcall(collectgarbage)
+assert(not a and type(b) == "string" and string.find(b, "error in __gc"))
+
+end
+print '+'
+
+
+-- testing userdata
+if T==nil then
+  (Message or print)('\a\n >>> testC not active: skipping userdata GC tests <<<\n\a')
+
+else
+
+  local function newproxy(u)
+    return debug.setmetatable(T.newuserdata(0), debug.getmetatable(u))
+  end
+
+  collectgarbage("stop")   -- stop collection
+  local u = newproxy(nil)
+  debug.setmetatable(u, {__gc = true})
+  local s = 0
+  local a = {[u] = 0}; setmetatable(a, {__mode = 'vk'})
+  for i=1,10 do a[newproxy(u)] = i end
+  for k in pairs(a) do assert(getmetatable(k) == getmetatable(u)) end
+  local a1 = {}; for k,v in pairs(a) do a1[k] = v end
+  for k,v in pairs(a1) do a[v] = k end
+  for i =1,10 do assert(a[i]) end
+  getmetatable(u).a = a1
+  getmetatable(u).u = u
+  do
+    local u = u
+    getmetatable(u).__gc = function (o)
+      assert(a[o] == 10-s)
+      assert(a[10-s] == nil) -- udata already removed from weak table
+      assert(getmetatable(o) == getmetatable(u))
+    assert(getmetatable(o).a[o] == 10-s)
+      s=s+1
+    end
+  end
+  a1, u = nil
+  assert(next(a) ~= nil)
+  collectgarbage()
+  assert(s==11)
+  collectgarbage()
+  assert(next(a) == nil)  -- finalized keys are removed in two cycles
+end
+
+
+-- __gc x weak tables
+local u = setmetatable({}, {__gc = true})
+-- __gc metamethod should be collected before running
+setmetatable(getmetatable(u), {__mode = "v"})
+getmetatable(u).__gc = function (o) os.exit(1) end  -- cannot happen
+u = nil
+collectgarbage()
+
+local u = setmetatable({}, {__gc = true})
+local m = getmetatable(u)
+m.x = {[{0}] = 1; [0] = {1}}; setmetatable(m.x, {__mode = "kv"});
+m.__gc = function (o)
+  assert(next(getmetatable(o).x) == nil)
+  m = 10
+end
+u, m = nil
+collectgarbage()
+assert(m==10)
+
+
+-- errors during collection
+u = setmetatable({}, {__gc = function () error "!!!" end})
+u = nil
+assert(not pcall(collectgarbage))
+
+
+if not _soft then
+  print("deep structures")
+  local a = {}
+  for i = 1,200000 do
+    a = {next = a}
+  end
+  collectgarbage()
+end
+
+-- create many threads with self-references and open upvalues
+local thread_id = 0
+local threads = {}
+
+local function fn (thread)
+    local x = {}
+    threads[thread_id] = function()
+                             thread = x
+                         end
+    coroutine.yield()
+end
+
+while thread_id < 1000 do
+    local thread = coroutine.create(fn)
+    coroutine.resume(thread, thread)
+    thread_id = thread_id + 1
+end
+
+do
+  collectgarbage()
+  collectgarbage"stop"
+  local x = gcinfo()
+  repeat
+    for i=1,1000 do _ENV.a = {} end
+    collectgarbage("step", 1)   -- steps should not unblock the collector
+  until gcinfo() > 2 * x
+  collectgarbage"restart"
+end
+
+
+if T then   -- tests for weird cases collecting upvalues
+  local a = 1200
+  local f = function () return a end    -- create upvalue for 'a'
+  assert(f() == 1200)
+
+  -- erase reference to upvalue 'a', mark it as dead, but does not collect it
+  T.gcstate("pause"); collectgarbage("stop")
+  f = nil
+  T.gcstate("sweepstring")
+
+  -- this function will reuse that dead upvalue...
+  f = function () return a end
+  assert(f() == 1200)
+
+  -- create coroutine with local variable 'b'
+  local co = coroutine.wrap(function()
+    local b = 150
+    coroutine.yield(function () return b end)
+  end)
+
+  T.gcstate("pause")
+  assert(co()() == 150)  -- create upvalue for 'b'
+
+  -- mark upvalue 'b' as dead, but does not collect it
+  T.gcstate("sweepstring")
+
+  co()   -- finish coroutine, "closing" that dead upvalue
+
+  assert(f() == 1200)
+  collectgarbage("restart")
+
+  print"+"
+end
+
+
+if T then
+  local debug = require "debug"
+  collectgarbage("generational"); collectgarbage("stop")
+  x = T.newuserdata(0)
+  T.gcstate("propagate")    -- ensure 'x' is old
+  T.gcstate("sweepstring")
+  T.gcstate("propagate")
+  assert(string.find(T.gccolor(x), "/old"))
+  local y = T.newuserdata(0)
+  debug.setmetatable(y, {__gc = true})   -- bless the new udata before...
+  debug.setmetatable(x, {__gc = true})   -- ...the old one
+  assert(string.find(T.gccolor(y), "white"))
+  T.checkmemory()
+  collectgarbage("incremental"); collectgarbage("restart")
+end
+
+
+if T then
+  print("emergency collections")
+  collectgarbage()
+  collectgarbage()
+  T.totalmem(T.totalmem() + 200)
+  for i=1,200 do local a = {} end
+  T.totalmem(1000000000)
+  collectgarbage()
+  local t = T.totalmem("table")
+  local a = {{}, {}, {}}   -- create 4 new tables
+  assert(T.totalmem("table") == t + 4)
+  t = T.totalmem("function")
+  a = function () end   -- create 1 new closure
+  assert(T.totalmem("function") == t + 1)
+  t = T.totalmem("thread")
+  a = coroutine.create(function () end)   -- create 1 new coroutine
+  assert(T.totalmem("thread") == t + 1)
+end
+
+-- create an object to be collected when state is closed
+do
+  local setmetatable,assert,type,print,getmetatable =
+        setmetatable,assert,type,print,getmetatable
+  local tt = {}
+  tt.__gc = function (o)
+    assert(getmetatable(o) == tt)
+    -- create new objects during GC
+    local a = 'xuxu'..(10+3)..'joao', {}
+    ___Glob = o  -- ressurect object!
+    setmetatable({}, tt)  -- creates a new one with same metatable
+    print(">>> closing state " .. "<<<\n")
+  end
+  local u = setmetatable({}, tt)
+  ___Glob = {u}   -- avoid object being collected before program end
+end
+
+-- create several objects to raise errors when collected while closing state
+do
+  local mt = {__gc = function (o) return o + 1 end}
+  for i = 1,10 do
+    -- create object and preserve it until the end
+    table.insert(___Glob, setmetatable({}, mt))
+  end
+end
+
+-- just to make sure
+assert(collectgarbage'isrunning')
+
+print('OK')

tests/Lua.Tests/tests-lua/goto.lua

@@ -0,0 +1,173 @@
+local function errmsg (code, m)
+  local st, msg = load(code)
+  assert(not st and string.find(msg, m))
+end
+
+-- cannot see label inside block
+errmsg([[ goto l1; do ::l1:: end ]], "label 'l1'")
+errmsg([[ do ::l1:: end goto l1; ]], "label 'l1'")
+
+-- repeated label
+errmsg([[ ::l1:: ::l1:: ]], "label 'l1'")
+
+
+-- undefined label
+errmsg([[ goto l1; local aa ::l1:: ::l2:: print(3) ]], "local 'aa'")
+
+-- jumping over variable definition
+errmsg([[
+do local bb, cc; goto l1; end
+local aa
+::l1:: print(3)
+]], "local 'aa'")
+
+-- jumping into a block
+errmsg([[ do ::l1:: end goto l1 ]], "label 'l1'")
+errmsg([[ goto l1 do ::l1:: end ]], "label 'l1'")
+
+-- cannot continue a repeat-until with variables
+errmsg([[
+  repeat
+    if x then goto cont end
+    local xuxu = 10
+    ::cont::
+  until xuxu < x
+]], "local 'xuxu'")
+
+-- simple gotos
+local x
+do
+  local y = 12
+  goto l1
+  ::l2:: x = x + 1; goto l3
+  ::l1:: x = y; goto l2
+end
+::l3:: ::l3_1:: assert(x == 13)
+
+
+-- long labels
+do
+  local prog = [[
+  do
+    local a = 1
+    goto l%sa; a = a + 1
+   ::l%sa:: a = a + 10
+    goto l%sb; a = a + 2
+   ::l%sb:: a = a + 20
+    return a
+  end
+  ]]
+  local label = string.rep("0123456789", 40)
+  prog = string.format(prog, label, label, label, label)
+  assert(assert(load(prog))() == 31)
+end
+
+-- goto to correct label when nested
+do goto l3; ::l3:: end   -- does not loop jumping to previous label 'l3'
+
+-- ok to jump over local dec. to end of block
+do
+  goto l1
+  local a = 23
+  x = a
+  ::l1::;
+end
+
+while true do
+  goto l4
+  goto l1  -- ok to jump over local dec. to end of block
+  goto l1  -- multiple uses of same label
+  local x = 45
+  ::l1:: ;;;
+end
+::l4:: assert(x == 13)
+
+if print then
+  goto l1   -- ok to jump over local dec. to end of block
+  error("should not be here")
+  goto l2   -- ok to jump over local dec. to end of block
+  local x
+  ::l1:: ; ::l2:: ;;
+else end
+
+-- to repeat a label in a different function is OK
+local function foo ()
+  local a = {}
+  goto l3
+  ::l1:: a[#a + 1] = 1; goto l2;
+  ::l2:: a[#a + 1] = 2; goto l5;
+  ::l3::
+  ::l3a:: a[#a + 1] = 3; goto l1;
+  ::l4:: a[#a + 1] = 4; goto l6;
+  ::l5:: a[#a + 1] = 5; goto l4;
+  ::l6:: assert(a[1] == 3 and a[2] == 1 and a[3] == 2 and
+              a[4] == 5 and a[5] == 4)
+  if not a[6] then a[6] = true; goto l3a end   -- do it twice
+end
+
+::l6:: foo()
+
+
+
+--------------------------------------------------------------------------------
+-- testing closing of upvalues
+
+local function foo ()
+  local a = {}
+  do
+  local i = 1
+  local k = 0
+  a[0] = function (y) k = y end
+  ::l1:: do
+    local x
+    if i > 2 then goto l2 end
+    a[i] = function (y) if y then x = y else return x + k end end
+    i = i + 1
+    goto l1
+  end
+  end
+  ::l2:: return a
+end
+
+local a = foo()
+a[1](10); a[2](20)
+assert(a[1]() == 10 and a[2]() == 20 and a[3] == nil)
+a[0](13)
+assert(a[1]() == 23 and a[2]() == 33)
+
+--------------------------------------------------------------------------------
+-- testing if x goto optimizations
+
+local function testG (a)
+  if a == 1 then
+    goto l1
+    error("should never be here!")
+  elseif a == 2 then goto l2
+  elseif a == 3 then goto l3
+  elseif a == 4 then
+    goto l1  -- go to inside the block
+    error("should never be here!")
+    ::l1:: a = a + 1   -- must go to 'if' end
+  else
+    goto l4
+    ::l4a:: a = a * 2; goto l4b
+    error("should never be here!")
+    ::l4:: goto l4a
+    error("should never be here!")
+    ::l4b::
+  end
+  do return a end
+  ::l2:: do return "2" end
+  ::l3:: do return "3" end
+  ::l1:: return "1"
+end
+
+assert(testG(1) == "1")
+assert(testG(2) == "2")
+assert(testG(3) == "3")
+assert(testG(4) == 5)
+assert(testG(5) == 10)
+--------------------------------------------------------------------------------
+
+
+print'OK'

tests/Lua.Tests/tests-lua/literals.lua

@@ -0,0 +1,258 @@
+print('testing scanner')
+
+debug = require "debug"
+
+
+local function dostring (x) return assert(load(x))() end
+
+dostring("x \v\f = \t\r 'a\0a' \v\f\f")
+assert(x == 'a\0a' and string.len(x) == 3)
+
+-- escape sequences
+assert('\n\"\'\\' == [[
+
+"'\]])
+
+assert(string.find("\a\b\f\n\r\t\v", "^%c%c%c%c%c%c%c$"))
+
+-- assume ASCII just for tests:
+assert("\09912" == 'c12')
+assert("\99ab" == 'cab')
+assert("\099" == '\99')
+assert("\099\n" == 'c\10')
+assert('\0\0\0alo' == '\0' .. '\0\0' .. 'alo')
+
+assert(010 .. 020 .. -030 == "1020-30")
+
+-- hexadecimal escapes
+assert("\x00\x05\x10\x1f\x3C\xfF\xe8" == "\0\5\16\31\60\255\232")
+
+local function lexstring (x, y, n)
+  local f = assert(load('return '..x..', debug.getinfo(1).currentline'))
+  local s, l = f()
+  assert(s == y and l == n)
+end
+
+lexstring("'abc\\z  \n   efg'", "abcefg", 2)
+lexstring("'abc\\z  \n\n\n'", "abc", 4)
+lexstring("'\\z  \n\t\f\v\n'",  "", 3)
+lexstring("[[\nalo\nalo\n\n]]", "alo\nalo\n\n", 5)
+lexstring("[[\nalo\ralo\n\n]]", "alo\nalo\n\n", 5)
+lexstring("[[\nalo\ralo\r\n]]", "alo\nalo\n", 4)
+lexstring("[[\ralo\n\ralo\r\n]]", "alo\nalo\n", 4)
+lexstring("[[alo]\n]alo]]", "alo]\n]alo", 2)
+
+assert("abc\z
+        def\z
+        ghi\z
+       " == 'abcdefghi')
+
+-- Error in escape sequences
+local function lexerror (s, err)
+  local st, msg = load('return '..s)
+  if err ~= '<eof>' then err = "'"..err.."'" end
+  assert(not st and string.find(msg, "near "..err, 1, true))
+end
+lexerror([["abc\x"]], [[\x"]])
+lexerror([["abc\x]], [[\x]])
+lexerror([["\x]], [[\x]])
+lexerror([["\x5"]], [[\x5"]])
+lexerror([["\x5]], [[\x5]])
+lexerror([["\xr"]], [[\xr]])
+lexerror([["\xr]], [[\xr]])
+lexerror([["\x.]], [[\x.]])
+lexerror([["\x8%"]], [[\x8%]])
+lexerror([["\xAG]], [[\xAG]])
+lexerror([["\g"]], [[\g]])
+lexerror([["\g]], [[\g]])
+lexerror([["\."]], [[\.]])
+
+lexerror([["\999"]], [[\999]])
+lexerror([["xyz\300"]], [[\300]])
+lexerror([["   \256"]], [[\256]])
+
+
+-- unfinished strings
+lexerror("[=[alo]]", "<eof>")
+lexerror("[=[alo]=", "<eof>")
+lexerror("[=[alo]", "<eof>")
+lexerror("'alo", "<eof>")
+lexerror("'alo \\z  \n\n", "<eof>")
+lexerror("'alo \\z", "<eof>")
+lexerror([['alo \98]], "<eof>")
+
+-- valid characters in variable names
+for i = 0, 255 do
+  local s = string.char(i)
+  assert(not string.find(s, "[a-zA-Z_]") == not load(s .. "=1"))
+  assert(not string.find(s, "[a-zA-Z_0-9]") ==
+         not load("a" .. s .. "1 = 1"))
+end
+
+
+-- long variable names
+
+var = string.rep('a', 15000)
+prog = string.format("%s = 5", var)
+dostring(prog)
+assert(_G[var] == 5)
+var = nil
+print('+')
+
+-- escapes --
+assert("\n\t" == [[
+
+	]])
+assert([[
+
+ $debug]] == "\n $debug")
+assert([[ [ ]] ~= [[ ] ]])
+-- long strings --
+b = "001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789"
+assert(string.len(b) == 960)
+prog = [=[
+print('+')
+
+a1 = [["isto e' um string com várias 'aspas'"]]
+a2 = "'aspas'"
+
+assert(string.find(a1, a2) == 31)
+print('+')
+
+a1 = [==[temp = [[um valor qualquer]]; ]==]
+assert(load(a1))()
+assert(temp == 'um valor qualquer')
+-- long strings --
+b = "001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789"
+assert(string.len(b) == 960)
+print('+')
+
+a = [[00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+00123456789012345678901234567890123456789123456789012345678901234567890123456789
+]]
+assert(string.len(a) == 1863)
+assert(string.sub(a, 1, 40) == string.sub(b, 1, 40))
+x = 1
+]=]
+
+print('+')
+x = nil
+dostring(prog)
+assert(x)
+
+prog = nil
+a = nil
+b = nil
+
+
+-- testing line ends
+prog = [[
+a = 1        -- a comment
+b = 2
+
+
+x = [=[
+hi
+]=]
+y = "\
+hello\r\n\
+"
+return debug.getinfo(1).currentline
+]]
+
+for _, n in pairs{"\n", "\r", "\n\r", "\r\n"} do
+  local prog, nn = string.gsub(prog, "\n", n)
+  assert(dostring(prog) == nn)
+  assert(_G.x == "hi\n" and _G.y == "\nhello\r\n\n")
+end
+
+
+-- testing comments and strings with long brackets
+a = [==[]=]==]
+assert(a == "]=")
+
+a = [==[[===[[=[]]=][====[]]===]===]==]
+assert(a == "[===[[=[]]=][====[]]===]===")
+
+a = [====[[===[[=[]]=][====[]]===]===]====]
+assert(a == "[===[[=[]]=][====[]]===]===")
+
+a = [=[]]]]]]]]]=]
+assert(a == "]]]]]]]]")
+
+
+--[===[
+x y z [==[ blu foo
+]==
+]
+]=]==]
+error error]=]===]
+
+-- generate all strings of four of these chars
+local x = {"=", "[", "]", "\n"}
+local len = 4
+local function gen (c, n)
+  if n==0 then coroutine.yield(c)
+  else
+    for _, a in pairs(x) do
+      gen(c..a, n-1)
+    end
+  end
+end
+
+for s in coroutine.wrap(function () gen("", len) end) do
+  assert(s == load("return [====[\n"..s.."]====]")())
+end
+
+
+-- testing decimal point locale
+if os.setlocale("pt_BR") or os.setlocale("ptb") then
+  assert(not load("á = 3"))  -- parser still works with C locale
+  assert(not load("a = (3,4)"))
+  assert(tonumber("3,4") == 3.4 and tonumber"3.4" == nil)
+  assert(assert(load("return 3.4"))() == 3.4)
+  assert(assert(load("return .4,3"))() == .4)
+  assert(assert(load("return 4."))() == 4.)
+  assert(assert(load("return 4.+.5"))() == 4.5)
+  local a,b = load("return 4.5.")
+  assert(string.find(b, "'4%.5%.'"))
+  assert(os.setlocale("C"))
+else
+  (Message or print)(
+   '\a\n >>> pt_BR locale not available: skipping decimal point tests <<<\n\a')
+end
+
+
+-- testing %q x line ends
+local s = "a string with \r and \n and \r\n and \n\r"
+local c = string.format("return %q", s)
+assert(assert(load(c))() == s)
+
+-- testing errors
+assert(not load"a = 'non-ending string")
+assert(not load"a = 'non-ending string\n'")
+assert(not load"a = '\\345'")
+assert(not load"a = [=x]")
+
+print('OK')

tests/Lua.Tests/tests-lua/locals.lua

@@ -0,0 +1,157 @@
+print('testing local variables and environments')
+
+local debug = require"debug"
+
+
+-- bug in 5.1:
+
+local function f(x) x = nil; return x end
+assert(f(10) == nil)
+
+local function f() local x; return x end
+assert(f(10) == nil)
+
+local function f(x) x = nil; local y; return x, y end
+assert(f(10) == nil and select(2, f(20)) == nil)
+
+do
+  local i = 10
+  do local i = 100; assert(i==100) end
+  do local i = 1000; assert(i==1000) end
+  assert(i == 10)
+  if i ~= 10 then
+    local i = 20
+  else
+    local i = 30
+    assert(i == 30)
+  end
+end
+
+
+
+f = nil
+
+local f
+x = 1
+
+a = nil
+load('local a = {}')()
+assert(a == nil)
+
+function f (a)
+  local _1, _2, _3, _4, _5
+  local _6, _7, _8, _9, _10
+  local x = 3
+  local b = a
+  local c,d = a,b
+  if (d == b) then
+    local x = 'q'
+    x = b
+    assert(x == 2)
+  else
+    assert(nil)
+  end
+  assert(x == 3)
+  local f = 10
+end
+
+local b=10
+local a; repeat local b; a,b=1,2; assert(a+1==b); until a+b==3
+
+
+assert(x == 1)
+
+f(2)
+assert(type(f) == 'function')
+
+
+local function getenv (f)
+  local a,b = debug.getupvalue(f, 1)
+  assert(a == '_ENV')
+  return b
+end
+
+-- test for global table of loaded chunks
+assert(getenv(load"a=3") == _G)
+local c = {}; local f = load("a = 3", nil, nil, c)
+assert(getenv(f) == c)
+assert(c.a == nil)
+f()
+assert(c.a == 3)
+
+-- testing limits for special instructions
+
+if not _soft then
+  local a
+  local p = 4
+  for i=2,31 do
+    for j=-3,3 do
+      assert(load(string.format([[local a=%s;
+                                        a=a+%s;
+                                        assert(a ==2^%s)]], j, p-j, i))) ()
+      assert(load(string.format([[local a=%s;
+                                        a=a-%s;
+                                        assert(a==-2^%s)]], -j, p-j, i))) ()
+      assert(load(string.format([[local a,b=0,%s;
+                                        a=b-%s;
+                                        assert(a==-2^%s)]], -j, p-j, i))) ()
+    end
+    p =2*p
+  end
+end
+
+print'+'
+
+
+if rawget(_G, "querytab") then
+  -- testing clearing of dead elements from tables
+  collectgarbage("stop")   -- stop GC
+  local a = {[{}] = 4, [3] = 0, alo = 1, 
+             a1234567890123456789012345678901234567890 = 10}
+
+  local t = querytab(a)
+
+  for k,_ in pairs(a) do a[k] = nil end
+  collectgarbage()   -- restore GC and collect dead fiels in `a'
+  for i=0,t-1 do
+    local k = querytab(a, i)
+    assert(k == nil or type(k) == 'number' or k == 'alo')
+  end
+end
+
+
+-- testing lexical environments
+
+assert(_ENV == _G)
+
+do local _ENV = (function (...) return ... end)(_G, dummy)
+
+do local _ENV = {assert=assert}; assert(true) end
+mt = {_G = _G}
+local foo,x
+do local _ENV = mt
+  function foo (x)
+    A = x
+    do local _ENV =  _G; A = 1000 end
+    return function (x) return A .. x end
+  end
+end
+assert(getenv(foo) == mt)
+x = foo('hi'); assert(mt.A == 'hi' and A == 1000)
+assert(x('*') == mt.A .. '*')
+
+do local _ENV = {assert=assert, A=10};
+  do local _ENV = {assert=assert, A=20};
+    assert(A==20);x=A
+  end
+  assert(A==10 and x==20)
+end
+assert(x==20)
+
+
+print('OK')
+
+return 5,f
+
+end
+

tests/Lua.Tests/tests-lua/main.lua

@@ -0,0 +1,260 @@
+# testing special comment on first line
+
+-- most (all?) tests here assume a reasonable "Unix-like" shell
+if _port then return end
+
+print ("testing lua.c options")
+
+assert(os.execute())   -- machine has a system command
+
+prog = os.tmpname()
+otherprog = os.tmpname()
+out = os.tmpname()
+
+do
+  local i = 0
+  while arg[i] do i=i-1 end
+  progname = arg[i+1]
+end
+print("progname: "..progname)
+
+local prepfile = function (s, p)
+  p = p or prog
+  io.output(p)
+  io.write(s)
+  assert(io.close())
+end
+
+function getoutput ()
+  io.input(out)
+  local t = io.read("*a")
+  io.input():close()
+  assert(os.remove(out))
+  return t
+end
+
+function checkprogout (s)
+  local t = getoutput()
+  for line in string.gmatch(s, ".-\n") do
+    assert(string.find(t, line, 1, true))
+  end
+end
+
+function checkout (s)
+  local t = getoutput()
+  if s ~= t then print(string.format("'%s' - '%s'\n", s, t)) end
+  assert(s == t)
+  return t
+end
+
+function auxrun (...)
+  local s = string.format(...)
+  s = string.gsub(s, "lua", '"'..progname..'"', 1)
+  return os.execute(s)
+end
+
+function RUN (...)
+  assert(auxrun(...))
+end
+
+function NoRun (...)
+  assert(not auxrun(...))
+end
+
+function NoRunMsg (...)
+  print("\n(the next error is expected by the test)")
+  return NoRun(...)
+end
+
+-- test environment variables used by Lua
+prepfile("print(package.path)")
+
+RUN("env LUA_INIT= LUA_PATH=x lua %s > %s", prog, out)
+checkout("x\n")
+
+RUN("env LUA_INIT= LUA_PATH_5_2=y LUA_PATH=x lua %s > %s", prog, out)
+checkout("y\n")
+
+prepfile("print(package.cpath)")
+
+RUN("env LUA_INIT= LUA_CPATH=xuxu lua %s > %s", prog, out)
+checkout("xuxu\n")
+
+RUN("env LUA_INIT= LUA_CPATH_5_2=yacc LUA_CPATH=x lua %s > %s", prog, out)
+checkout("yacc\n")
+
+prepfile("print(X)")
+RUN('env LUA_INIT="X=3" lua %s > %s', prog, out)
+checkout("3\n")
+
+prepfile("print(X)")
+RUN('env LUA_INIT_5_2="X=10" LUA_INIT="X=3" lua %s > %s', prog, out)
+checkout("10\n")
+
+-- test option '-E'
+prepfile("print(package.path, package.cpath)")
+RUN('env LUA_INIT="error(10)" LUA_PATH=xxx LUA_CPATH=xxx lua -E %s > %s',
+     prog, out)
+local defaultpath = getoutput()
+defaultpath = string.match(defaultpath, "^(.-)\t")   -- remove tab
+assert(not string.find(defaultpath, "xxx") and string.find(defaultpath, "lua"))
+
+
+-- test replacement of ';;' to default path
+local function convert (p)
+  prepfile("print(package.path)")
+  RUN('env LUA_PATH="%s" lua %s > %s', p, prog, out)
+  local expected = getoutput()
+  expected = string.sub(expected, 1, -2)   -- cut final end of line
+  assert(string.gsub(p, ";;", ";"..defaultpath..";") == expected)
+end
+
+convert(";")
+convert(";;")
+convert(";;;")
+convert(";;;;")
+convert(";;;;;")
+convert(";;a;;;bc")
+
+
+-- test 2 files
+prepfile("print(1); a=2; return {x=15}")
+prepfile(("print(a); print(_G['%s'].x)"):format(prog), otherprog)
+RUN('env LUA_PATH="?;;" lua -l %s -l%s -lstring -l io %s > %s', prog, otherprog, otherprog, out)
+checkout("1\n2\n15\n2\n15\n")
+
+local a = [[
+  assert(#arg == 3 and arg[1] == 'a' and
+         arg[2] == 'b' and arg[3] == 'c')
+  assert(arg[-1] == '--' and arg[-2] == "-e " and arg[-3] == '%s')
+  assert(arg[4] == nil and arg[-4] == nil)
+  local a, b, c = ...
+  assert(... == 'a' and a == 'a' and b == 'b' and c == 'c')
+]]
+a = string.format(a, progname)
+prepfile(a)
+RUN('lua "-e " -- %s a b c', prog)
+
+prepfile"assert(arg==nil)"
+prepfile("assert(arg)", otherprog)
+RUN('env LUA_PATH="?;;" lua -l%s - < %s', prog, otherprog)
+
+prepfile""
+RUN("lua - < %s > %s", prog, out)
+checkout("")
+
+-- test many arguments
+prepfile[[print(({...})[30])]]
+RUN("lua %s %s > %s", prog, string.rep(" a", 30), out)
+checkout("a\n")
+
+RUN([[lua "-eprint(1)" -ea=3 -e "print(a)" > %s]], out)
+checkout("1\n3\n")
+
+prepfile[[
+  print(
+1, a
+)
+]]
+RUN("lua - < %s > %s", prog, out)
+checkout("1\tnil\n")
+
+prepfile[[
+= (6*2-6) -- ===
+a 
+= 10
+print(a)
+= a]]
+RUN([[lua -e"_PROMPT='' _PROMPT2=''" -i < %s > %s]], prog, out)
+checkprogout("6\n10\n10\n\n")
+
+prepfile("a = [[b\nc\nd\ne]]\n=a")
+print("temporary program file: "..prog)
+RUN([[lua -e"_PROMPT='' _PROMPT2=''" -i < %s > %s]], prog, out)
+checkprogout("b\nc\nd\ne\n\n")
+
+prompt = "alo"
+prepfile[[ --
+a = 2
+]]
+RUN([[lua "-e_PROMPT='%s'" -i < %s > %s]], prompt, prog, out)
+local t = getoutput()
+assert(string.find(t, prompt .. ".*" .. prompt .. ".*" .. prompt))
+
+-- test for error objects
+prepfile[[
+debug = require "debug"
+m = {x=0}
+setmetatable(m, {__tostring = function(x)
+  return debug.getinfo(4).currentline + x.x
+end})
+error(m)
+]]
+NoRun([[lua %s 2> %s]], prog, out)   -- no message
+checkout(progname..": 6\n")
+
+
+s = [=[ -- 
+function f ( x ) 
+  local a = [[
+xuxu
+]]
+  local b = "\
+xuxu\n"
+  if x == 11 then return 1 , 2 end  --[[ test multiple returns ]]
+  return x + 1 
+  --\\
+end
+=( f( 10 ) )
+assert( a == b )
+=f( 11 )  ]=]
+s = string.gsub(s, ' ', '\n\n')
+prepfile(s)
+RUN([[lua -e"_PROMPT='' _PROMPT2=''" -i < %s > %s]], prog, out)
+checkprogout("11\n1\t2\n\n")
+  
+prepfile[[#comment in 1st line without \n at the end]]
+RUN("lua %s", prog)
+  
+prepfile[[#test line number when file starts with comment line
+debug = require"debug"
+print(debug.getinfo(1).currentline)
+]]
+RUN("lua %s > %s", prog, out)
+checkprogout('3')
+
+-- close Lua with an open file
+prepfile(string.format([[io.output(%q); io.write('alo')]], out))
+RUN("lua %s", prog)
+checkout('alo')
+
+-- bug in 5.2 beta (extra \0 after version line)
+RUN([[lua -v  -e'print"hello"' > %s]], out)
+t = getoutput()
+assert(string.find(t, "PUC%-Rio\nhello"))
+
+
+-- testing os.exit
+prepfile("os.exit(nil, true)")
+RUN("lua %s", prog)
+prepfile("os.exit(0, true)")
+RUN("lua %s", prog)
+prepfile("os.exit(true, true)")
+RUN("lua %s", prog)
+prepfile("os.exit(1, true)")
+NoRun("lua %s", prog)   -- no message
+prepfile("os.exit(false, true)")
+NoRun("lua %s", prog)   -- no message
+
+assert(os.remove(prog))
+assert(os.remove(otherprog))
+assert(not os.remove(out))
+
+RUN("lua -v")
+
+NoRunMsg("lua -h")
+NoRunMsg("lua -e")
+NoRunMsg("lua -e a")
+NoRunMsg("lua -f")
+
+print("OK")

tests/Lua.Tests/tests-lua/math.lua

@@ -0,0 +1,287 @@
+print("testing numbers and math lib")
+
+
+-- basic float notation
+assert(0e12 == 0 and .0 == 0 and 0. == 0 and .2e2 == 20 and 2.E-1 == 0.2)
+
+do
+  local a,b,c = "2", " 3e0 ", " 10  "
+  assert(a+b == 5 and -b == -3 and b+"2" == 5 and "10"-c == 0)
+  assert(type(a) == 'string' and type(b) == 'string' and type(c) == 'string')
+  assert(a == "2" and b == " 3e0 " and c == " 10  " and -c == -"  10 ")
+  assert(c%a == 0 and a^b == 08)
+  a = 0
+  assert(a == -a and 0 == -0)
+end
+
+do
+  local x = -1
+  local mz = 0/x   -- minus zero
+  t = {[0] = 10, 20, 30, 40, 50}
+  assert(t[mz] == t[0] and t[-0] == t[0])
+end
+
+do
+  local a,b = math.modf(3.5)
+  assert(a == 3 and b == 0.5)
+  assert(math.huge > 10e30)
+  assert(-math.huge < -10e30)
+end
+
+function f(...)
+  if select('#', ...) == 1 then
+    return (...)
+  else
+    return "***"
+  end
+end
+
+
+-- testing numeric strings
+
+assert("2" + 1 == 3)
+assert("2 " + 1 == 3)
+assert(" -2 " + 1 == -1)
+assert(" -0xa " + 1 == -9)
+
+
+-- testing 'tonumber'
+assert(tonumber{} == nil)
+assert(tonumber'+0.01' == 1/100 and tonumber'+.01' == 0.01 and
+       tonumber'.01' == 0.01    and tonumber'-1.' == -1 and
+       tonumber'+1.' == 1)
+assert(tonumber'+ 0.01' == nil and tonumber'+.e1' == nil and
+       tonumber'1e' == nil     and tonumber'1.0e+' == nil and
+       tonumber'.' == nil)
+assert(tonumber('-012') == -010-2)
+assert(tonumber('-1.2e2') == - - -120)
+
+assert(tonumber("0xffffffffffff") == 2^(4*12) - 1)
+assert(tonumber("0x"..string.rep("f", 150)) == 2^(4*150) - 1)
+assert(tonumber('0x3.' .. string.rep('0', 100)) == 3)
+assert(tonumber('0x0.' .. string.rep('0', 150).."1") == 2^(-4*151))
+
+-- testing 'tonumber' with base
+assert(tonumber('  001010  ', 2) == 10)
+assert(tonumber('  001010  ', 10) == 001010)
+assert(tonumber('  -1010  ', 2) == -10)
+assert(tonumber('10', 36) == 36)
+assert(tonumber('  -10  ', 36) == -36)
+assert(tonumber('  +1Z  ', 36) == 36 + 35)
+assert(tonumber('  -1z  ', 36) == -36 + -35)
+assert(tonumber('-fFfa', 16) == -(10+(16*(15+(16*(15+(16*15)))))))
+assert(tonumber(string.rep('1', 42), 2) + 1 == 2^42)
+assert(tonumber(string.rep('1', 34), 2) + 1 == 2^34)
+assert(tonumber('ffffFFFF', 16)+1 == 2^32)
+assert(tonumber('0ffffFFFF', 16)+1 == 2^32)
+assert(tonumber('-0ffffffFFFF', 16) - 1 == -2^40)
+for i = 2,36 do
+  assert(tonumber('\t10000000000\t', i) == i^10)
+end
+
+-- testing 'tonumber' fo invalid formats
+assert(f(tonumber('fFfa', 15)) == nil)
+assert(f(tonumber('099', 8)) == nil)
+assert(f(tonumber('1\0', 2)) == nil)
+assert(f(tonumber('', 8)) == nil)
+assert(f(tonumber('  ', 9)) == nil)
+assert(f(tonumber('  ', 9)) == nil)
+assert(f(tonumber('0xf', 10)) == nil)
+
+assert(f(tonumber('inf')) == nil)
+assert(f(tonumber(' INF ')) == nil)
+assert(f(tonumber('Nan')) == nil)
+assert(f(tonumber('nan')) == nil)
+
+assert(f(tonumber('  ')) == nil)
+assert(f(tonumber('')) == nil)
+assert(f(tonumber('1  a')) == nil)
+assert(f(tonumber('1\0')) == nil)
+assert(f(tonumber('1 \0')) == nil)
+assert(f(tonumber('1\0 ')) == nil)
+assert(f(tonumber('e1')) == nil)
+assert(f(tonumber('e  1')) == nil)
+assert(f(tonumber(' 3.4.5 ')) == nil)
+
+
+-- testing 'tonumber' for invalid hexadecimal formats
+
+assert(tonumber('0x') == nil)
+assert(tonumber('x') == nil)
+assert(tonumber('x3') == nil)
+assert(tonumber('00x2') == nil)
+assert(tonumber('0x 2') == nil)
+assert(tonumber('0 x2') == nil)
+assert(tonumber('23x') == nil)
+assert(tonumber('- 0xaa') == nil)
+
+
+-- testing hexadecimal numerals
+
+assert(0x10 == 16 and 0xfff == 2^12 - 1 and 0XFB == 251)
+assert(0x0p12 == 0 and 0x.0p-3 == 0)
+assert(0xFFFFFFFF == 2^32 - 1)
+assert(tonumber('+0x2') == 2)
+assert(tonumber('-0xaA') == -170)
+assert(tonumber('-0xffFFFfff') == -2^32 + 1)
+
+-- possible confusion with decimal exponent
+assert(0E+1 == 0 and 0xE+1 == 15 and 0xe-1 == 13)
+
+
+-- floating hexas
+
+assert(tonumber('  0x2.5  ') == 0x25/16)
+assert(tonumber('  -0x2.5  ') == -0x25/16)
+assert(tonumber('  +0x0.51p+8  ') == 0x51)
+assert(tonumber('0x0.51p') == nil)
+assert(tonumber('0x5p+-2') == nil)
+assert(0x.FfffFFFF == 1 - '0x.00000001')
+assert('0xA.a' + 0 == 10 + 10/16)
+assert(0xa.aP4 == 0XAA)
+assert(0x4P-2 == 1)
+assert(0x1.1 == '0x1.' + '+0x.1')
+
+
+assert(1.1 == 1.+.1)
+assert(100.0 == 1E2 and .01 == 1e-2)
+assert(1111111111111111-1111111111111110== 1000.00e-03)
+--     1234567890123456
+assert(1.1 == '1.'+'.1')
+assert('1111111111111111'-'1111111111111110' == tonumber"  +0.001e+3 \n\t")
+
+function eq (a,b,limit)
+  if not limit then limit = 10E-10 end
+  return math.abs(a-b) <= limit
+end
+
+assert(0.1e-30 > 0.9E-31 and 0.9E30 < 0.1e31)
+
+assert(0.123456 > 0.123455)
+
+assert(tonumber('+1.23E18') == 1.23*10^18)
+
+-- testing order operators
+assert(not(1<1) and (1<2) and not(2<1))
+assert(not('a'<'a') and ('a'<'b') and not('b'<'a'))
+assert((1<=1) and (1<=2) and not(2<=1))
+assert(('a'<='a') and ('a'<='b') and not('b'<='a'))
+assert(not(1>1) and not(1>2) and (2>1))
+assert(not('a'>'a') and not('a'>'b') and ('b'>'a'))
+assert((1>=1) and not(1>=2) and (2>=1))
+assert(('a'>='a') and not('a'>='b') and ('b'>='a'))
+
+-- testing mod operator
+assert(-4%3 == 2)
+assert(4%-3 == -2)
+assert(math.pi - math.pi % 1 == 3)
+assert(math.pi - math.pi % 0.001 == 3.141)
+
+local function testbit(a, n)
+  return a/2^n % 2 >= 1
+end
+
+assert(eq(math.sin(-9.8)^2 + math.cos(-9.8)^2, 1))
+assert(eq(math.tan(math.pi/4), 1))
+assert(eq(math.sin(math.pi/2), 1) and eq(math.cos(math.pi/2), 0))
+assert(eq(math.atan(1), math.pi/4) and eq(math.acos(0), math.pi/2) and
+       eq(math.asin(1), math.pi/2))
+assert(eq(math.deg(math.pi/2), 90) and eq(math.rad(90), math.pi/2))
+assert(math.abs(-10) == 10)
+assert(eq(math.atan2(1,0), math.pi/2))
+assert(math.ceil(4.5) == 5.0)
+assert(math.floor(4.5) == 4.0)
+assert(math.fmod(10,3) == 1)
+assert(eq(math.sqrt(10)^2, 10))
+assert(eq(math.log(2, 10), math.log(2)/math.log(10)))
+assert(eq(math.log(2, 2), 1))
+assert(eq(math.log(9, 3), 2))
+assert(eq(math.exp(0), 1))
+assert(eq(math.sin(10), math.sin(10%(2*math.pi))))
+local v,e = math.frexp(math.pi)
+assert(eq(math.ldexp(v,e), math.pi))
+
+assert(eq(math.tanh(3.5), math.sinh(3.5)/math.cosh(3.5)))
+
+assert(tonumber(' 1.3e-2 ') == 1.3e-2)
+assert(tonumber(' -1.00000000000001 ') == -1.00000000000001)
+
+-- testing constant limits
+-- 2^23 = 8388608
+assert(8388609 + -8388609 == 0)
+assert(8388608 + -8388608 == 0)
+assert(8388607 + -8388607 == 0)
+
+-- testing implicit convertions
+
+local a,b = '10', '20'
+assert(a*b == 200 and a+b == 30 and a-b == -10 and a/b == 0.5 and -b == -20)
+assert(a == '10' and b == '20')
+
+
+if not _port then
+  print("testing -0 and NaN")
+  local mz, z = -0, 0
+  assert(mz == z)
+  assert(1/mz < 0 and 0 < 1/z)
+  local a = {[mz] = 1}
+  assert(a[z] == 1 and a[mz] == 1)
+  local inf = math.huge * 2 + 1
+  mz, z = -1/inf, 1/inf
+  assert(mz == z)
+  assert(1/mz < 0 and 0 < 1/z)
+  local NaN = inf - inf
+  assert(NaN ~= NaN)
+  assert(not (NaN < NaN))
+  assert(not (NaN <= NaN))
+  assert(not (NaN > NaN))
+  assert(not (NaN >= NaN))
+  assert(not (0 < NaN) and not (NaN < 0))
+  local NaN1 = 0/0
+  assert(NaN ~= NaN1 and not (NaN <= NaN1) and not (NaN1 <= NaN))
+  local a = {}
+  assert(not pcall(function () a[NaN] = 1 end))
+  assert(a[NaN] == nil)
+  a[1] = 1
+  assert(not pcall(function () a[NaN] = 1 end))
+  assert(a[NaN] == nil)
+  -- string with same binary representation as 0.0 (may create problems
+  -- for constant manipulation in the pre-compiler)
+  local a1, a2, a3, a4, a5 = 0, 0, "\0\0\0\0\0\0\0\0", 0, "\0\0\0\0\0\0\0\0"
+  assert(a1 == a2 and a2 == a4 and a1 ~= a3)
+  assert(a3 == a5)
+end
+
+
+if not _port then
+  print("testing 'math.random'")
+  math.randomseed(0)
+
+  local function aux (x1, x2, p)
+    local Max = -math.huge
+    local Min = math.huge
+    for i = 0, 20000 do
+      local t = math.random(table.unpack(p))
+      Max = math.max(Max, t)
+      Min = math.min(Min, t)
+      if eq(Max, x2, 0.001) and eq(Min, x1, 0.001) then
+        goto ok
+      end
+    end
+    -- loop ended without satisfing condition
+    assert(false)
+   ::ok::
+    assert(x1 <= Min and Max<=x2)
+  end
+
+  aux(0, 1, {})
+  aux(-10, 0, {-10,0})
+end
+
+for i=1,10 do
+  local t = math.random(5)
+  assert(1 <= t and t <= 5)
+end
+
+
+print('OK')

tests/Lua.Tests/tests-lua/nextvar.lua

@@ -0,0 +1,461 @@
+print('testing tables, next, and for')
+
+local a = {}
+
+-- make sure table has lots of space in hash part
+for i=1,100 do a[i.."+"] = true end
+for i=1,100 do a[i.."+"] = nil end
+-- fill hash part with numeric indices testing size operator
+for i=1,100 do
+  a[i] = true
+  assert(#a == i)
+end
+
+-- testing ipairs
+local x = 0
+for k,v in ipairs{10,20,30;x=12} do
+  x = x + 1
+  assert(k == x and v == x * 10)
+end
+
+for _ in ipairs{x=12, y=24} do assert(nil) end
+
+-- test for 'false' x ipair
+x = false
+local i = 0
+for k,v in ipairs{true,false,true,false} do
+  i = i + 1
+  x = not x
+  assert(x == v)
+end
+assert(i == 4)
+
+-- iterator function is always the same
+assert(type(ipairs{}) == 'function' and ipairs{} == ipairs{})
+
+if T then  --[
+-- testing table sizes
+
+local function log2 (x) return math.log(x, 2) end
+
+local function mp2 (n)   -- minimum power of 2 >= n
+  local mp = 2^math.ceil(log2(n))
+  assert(n == 0 or (mp/2 < n and n <= mp))
+  return mp
+end
+
+local function fb (n)
+  local r, nn = T.int2fb(n)
+  assert(r < 256)
+  return nn
+end
+
+-- test fb function
+local a = 1
+local lim = 2^30
+while a < lim do
+  local n = fb(a)
+  assert(a <= n and n <= a*1.125)
+  a = math.ceil(a*1.3)
+end
+
+ 
+local function check (t, na, nh)
+  local a, h = T.querytab(t)
+  if a ~= na or h ~= nh then
+    print(na, nh, a, h)
+    assert(nil)
+  end
+end
+
+
+-- testing C library sizes
+do
+  local s = 0
+  for _ in pairs(math) do s = s + 1 end
+  check(math, 0, mp2(s))
+end
+
+
+-- testing constructor sizes
+local lim = 40
+local s = 'return {'
+for i=1,lim do
+  s = s..i..','
+  local s = s
+  for k=0,lim do 
+    local t = load(s..'}')()
+    assert(#t == i)
+    check(t, fb(i), mp2(k))
+    s = string.format('%sa%d=%d,', s, k, k)
+  end
+end
+
+
+-- tests with unknown number of elements
+local a = {}
+for i=1,lim do a[i] = i end   -- build auxiliary table
+for k=0,lim do
+  local a = {table.unpack(a,1,k)}
+  assert(#a == k)
+  check(a, k, 0)
+  a = {1,2,3,table.unpack(a,1,k)}
+  check(a, k+3, 0)
+  assert(#a == k + 3)
+end
+
+
+-- testing tables dynamically built
+local lim = 130
+local a = {}; a[2] = 1; check(a, 0, 1)
+a = {}; a[0] = 1; check(a, 0, 1); a[2] = 1; check(a, 0, 2)
+a = {}; a[0] = 1; a[1] = 1; check(a, 1, 1)
+a = {}
+for i = 1,lim do
+  a[i] = 1
+  assert(#a == i)
+  check(a, mp2(i), 0)
+end
+
+a = {}
+for i = 1,lim do
+  a['a'..i] = 1
+  assert(#a == 0)
+  check(a, 0, mp2(i))
+end
+
+a = {}
+for i=1,16 do a[i] = i end
+check(a, 16, 0)
+if not _port then
+  for i=1,11 do a[i] = nil end
+  for i=30,50 do a[i] = nil end   -- force a rehash (?)
+  check(a, 0, 8)   -- only 5 elements in the table
+  a[10] = 1
+  for i=30,50 do a[i] = nil end   -- force a rehash (?)
+  check(a, 0, 8)   -- only 6 elements in the table
+  for i=1,14 do a[i] = nil end
+  for i=18,50 do a[i] = nil end   -- force a rehash (?)
+  check(a, 0, 4)   -- only 2 elements ([15] and [16])
+end
+
+-- reverse filling
+for i=1,lim do
+  local a = {}
+  for i=i,1,-1 do a[i] = i end   -- fill in reverse
+  check(a, mp2(i), 0)
+end
+
+-- size tests for vararg
+lim = 35
+function foo (n, ...)
+  local arg = {...}
+  check(arg, n, 0)
+  assert(select('#', ...) == n)
+  arg[n+1] = true
+  check(arg, mp2(n+1), 0)
+  arg.x = true
+  check(arg, mp2(n+1), 1)
+end
+local a = {}
+for i=1,lim do a[i] = true; foo(i, table.unpack(a)) end
+
+end  --]
+
+
+-- test size operation on empty tables
+assert(#{} == 0)
+assert(#{nil} == 0)
+assert(#{nil, nil} == 0)
+assert(#{nil, nil, nil} == 0)
+assert(#{nil, nil, nil, nil} == 0)
+print'+'
+
+
+local nofind = {}
+
+a,b,c = 1,2,3
+a,b,c = nil
+
+
+-- next uses always the same iteraction function
+assert(next{} == next{})
+
+local function find (name)
+  local n,v
+  while 1 do
+    n,v = next(_G, n)
+    if not n then return nofind end
+    assert(v ~= nil)
+    if n == name then return v end
+  end
+end
+
+local function find1 (name)
+  for n,v in pairs(_G) do
+    if n==name then return v end
+  end
+  return nil  -- not found
+end
+
+
+assert(print==find("print") and print == find1("print"))
+assert(_G["print"]==find("print"))
+assert(assert==find1("assert"))
+assert(nofind==find("return"))
+assert(not find1("return"))
+_G["ret" .. "urn"] = nil
+assert(nofind==find("return"))
+_G["xxx"] = 1
+assert(xxx==find("xxx"))
+
+print('+')
+
+a = {}
+for i=0,10000 do
+  if math.fmod(i,10) ~= 0 then
+    a['x'..i] = i
+  end
+end
+
+n = {n=0}
+for i,v in pairs(a) do
+  n.n = n.n+1
+  assert(i and v and a[i] == v)
+end
+assert(n.n == 9000)
+a = nil
+
+do   -- clear global table
+  local a = {}
+  for n,v in pairs(_G) do a[n]=v end
+  for n,v in pairs(a) do
+    if not package.loaded[n] and type(v) ~= "function" and
+       not string.find(n, "^[%u_]") then
+     _G[n] = nil
+    end
+    collectgarbage()
+  end
+end
+
+
+-- 
+
+local function checknext (a)
+  local b = {}
+  do local k,v = next(a); while k do b[k] = v; k,v = next(a,k) end end
+  for k,v in pairs(b) do assert(a[k] == v) end
+  for k,v in pairs(a) do assert(b[k] == v) end
+end
+
+checknext{1,x=1,y=2,z=3}
+checknext{1,2,x=1,y=2,z=3}
+checknext{1,2,3,x=1,y=2,z=3}
+checknext{1,2,3,4,x=1,y=2,z=3}
+checknext{1,2,3,4,5,x=1,y=2,z=3}
+
+assert(#{} == 0)
+assert(#{[-1] = 2} == 0)
+assert(#{1,2,3,nil,nil} == 3)
+for i=0,40 do
+  local a = {}
+  for j=1,i do a[j]=j end
+  assert(#a == i)
+end
+
+-- 'maxn' is now deprecated, but it is easily defined in Lua
+function table.maxn (t)
+  local max = 0
+  for k in pairs(t) do
+    max = (type(k) == 'number') and math.max(max, k) or max
+  end
+  return max
+end
+
+assert(table.maxn{} == 0)
+assert(table.maxn{["1000"] = true} == 0)
+assert(table.maxn{["1000"] = true, [24.5] = 3} == 24.5)
+assert(table.maxn{[1000] = true} == 1000)
+assert(table.maxn{[10] = true, [100*math.pi] = print} == 100*math.pi)
+
+table.maxn = nil
+
+-- int overflow
+a = {}
+for i=0,50 do a[math.pow(2,i)] = true end
+assert(a[#a])
+
+print('+')
+
+
+-- erasing values
+local t = {[{1}] = 1, [{2}] = 2, [string.rep("x ", 4)] = 3,
+           [100.3] = 4, [4] = 5}
+
+local n = 0
+for k, v in pairs( t ) do
+  n = n+1
+  assert(t[k] == v)
+  t[k] = nil
+  collectgarbage()
+  assert(t[k] == nil)
+end
+assert(n == 5)
+
+
+local function test (a)
+  assert(not pcall(table.insert, a, 2, 20));
+  table.insert(a, 10); table.insert(a, 2, 20);
+  table.insert(a, 1, -1); table.insert(a, 40);
+  table.insert(a, #a+1, 50)
+  table.insert(a, 2, -2)
+  assert(not pcall(table.insert, a, 0, 20));
+  assert(not pcall(table.insert, a, #a + 2, 20));
+  assert(table.remove(a,1) == -1)
+  assert(table.remove(a,1) == -2)
+  assert(table.remove(a,1) == 10)
+  assert(table.remove(a,1) == 20)
+  assert(table.remove(a,1) == 40)
+  assert(table.remove(a,1) == 50)
+  assert(table.remove(a,1) == nil)
+  assert(table.remove(a) == nil)
+  assert(table.remove(a, #a) == nil)
+end
+
+a = {n=0, [-7] = "ban"}
+test(a)
+assert(a.n == 0 and a[-7] == "ban")
+
+a = {[-7] = "ban"};
+test(a)
+assert(a.n == nil and #a == 0 and a[-7] == "ban")
+
+a = {[-1] = "ban"}
+test(a)
+assert(#a == 0 and table.remove(a) == nil and a[-1] == "ban")
+
+a = {[0] = "ban"}
+assert(#a == 0 and table.remove(a) == "ban" and a[0] == nil)
+
+table.insert(a, 1, 10); table.insert(a, 1, 20); table.insert(a, 1, -1)
+assert(table.remove(a) == 10)
+assert(table.remove(a) == 20)
+assert(table.remove(a) == -1)
+assert(table.remove(a) == nil)
+
+a = {'c', 'd'}
+table.insert(a, 3, 'a')
+table.insert(a, 'b')
+assert(table.remove(a, 1) == 'c')
+assert(table.remove(a, 1) == 'd')
+assert(table.remove(a, 1) == 'a')
+assert(table.remove(a, 1) == 'b')
+assert(table.remove(a, 1) == nil)
+assert(#a == 0 and a.n == nil)
+
+a = {10,20,30,40}
+assert(table.remove(a, #a + 1) == nil)
+assert(not pcall(table.remove, a, 0))
+assert(a[#a] == 40)
+assert(table.remove(a, #a) == 40)
+assert(a[#a] == 30)
+assert(table.remove(a, 2) == 20)
+assert(a[#a] == 30 and #a == 2)
+print('+')
+
+a = {}
+for i=1,1000 do
+  a[i] = i; a[i-1] = nil
+end
+assert(next(a,nil) == 1000 and next(a,1000) == nil)
+
+assert(next({}) == nil)
+assert(next({}, nil) == nil)
+
+for a,b in pairs{} do error"not here" end
+for i=1,0 do error'not here' end
+for i=0,1,-1 do error'not here' end
+a = nil; for i=1,1 do assert(not a); a=1 end; assert(a)
+a = nil; for i=1,1,-1 do assert(not a); a=1 end; assert(a)
+
+if not _port then
+  print("testing precision in numeric for")
+  local a = 0; for i=0, 1, 0.1 do a=a+1 end; assert(a==11)
+  a = 0; for i=0, 0.999999999, 0.1 do a=a+1 end; assert(a==10)
+  a = 0; for i=1, 1, 1 do a=a+1 end; assert(a==1)
+  a = 0; for i=1e10, 1e10, -1 do a=a+1 end; assert(a==1)
+  a = 0; for i=1, 0.99999, 1 do a=a+1 end; assert(a==0)
+  a = 0; for i=99999, 1e5, -1 do a=a+1 end; assert(a==0)
+  a = 0; for i=1, 0.99999, -1 do a=a+1 end; assert(a==1)
+end
+
+-- conversion
+a = 0; for i="10","1","-2" do a=a+1 end; assert(a==5)
+
+
+collectgarbage()
+
+
+-- testing generic 'for'
+
+local function f (n, p)
+  local t = {}; for i=1,p do t[i] = i*10 end
+  return function (_,n)
+           if n > 0 then
+             n = n-1
+             return n, table.unpack(t)
+           end
+         end, nil, n
+end
+
+local x = 0
+for n,a,b,c,d in f(5,3) do
+  x = x+1
+  assert(a == 10 and b == 20 and c == 30 and d == nil)
+end
+assert(x == 5)
+
+
+
+-- testing __pairs and __ipairs metamethod
+a = {}
+do
+  local x,y,z = pairs(a)
+  assert(type(x) == 'function' and y == a and z == nil)
+end
+
+local function foo (e,i)
+  assert(e == a)
+  if i <= 10 then return i+1, i+2 end
+end
+
+local function foo1 (e,i)
+  i = i + 1
+  assert(e == a)
+  if i <= e.n then return i,a[i] end
+end
+
+setmetatable(a, {__pairs = function (x) return foo, x, 0 end})
+
+local i = 0
+for k,v in pairs(a) do
+  i = i + 1
+  assert(k == i and v == k+1)
+end
+
+a.n = 5
+a[3] = 30
+
+a = {n=10}
+setmetatable(a, {__len = function (x) return x.n end,
+                 __ipairs = function (x) return function (e,i)
+                             if i < #e then return i+1 end
+                           end, x, 0 end})
+i = 0
+for k,v in ipairs(a) do
+  i = i + 1
+  assert(k == i and v == nil)
+end
+assert(i == a.n)
+
+print"OK"

tests/Lua.Tests/tests-lua/pm.lua

@@ -0,0 +1,344 @@
+print('testing pattern matching')
+
+function f(s, p)
+  local i,e = string.find(s, p)
+  if i then return string.sub(s, i, e) end
+end
+
+function f1(s, p)
+  p = string.gsub(p, "%%([0-9])", function (s) return "%" .. (s+1) end)
+  p = string.gsub(p, "^(^?)", "%1()", 1)
+  p = string.gsub(p, "($?)$", "()%1", 1)
+  local t = {string.match(s, p)}
+  return string.sub(s, t[1], t[#t] - 1)
+end
+
+a,b = string.find('', '')    -- empty patterns are tricky
+assert(a == 1 and b == 0);
+a,b = string.find('alo', '')
+assert(a == 1 and b == 0)
+a,b = string.find('a\0o a\0o a\0o', 'a', 1)   -- first position
+assert(a == 1 and b == 1)
+a,b = string.find('a\0o a\0o a\0o', 'a\0o', 2)   -- starts in the midle
+assert(a == 5 and b == 7)
+a,b = string.find('a\0o a\0o a\0o', 'a\0o', 9)   -- starts in the midle
+assert(a == 9 and b == 11)
+a,b = string.find('a\0a\0a\0a\0\0ab', '\0ab', 2);  -- finds at the end
+assert(a == 9 and b == 11);
+a,b = string.find('a\0a\0a\0a\0\0ab', 'b')    -- last position
+assert(a == 11 and b == 11)
+assert(string.find('a\0a\0a\0a\0\0ab', 'b\0') == nil)   -- check ending
+assert(string.find('', '\0') == nil)
+assert(string.find('alo123alo', '12') == 4)
+assert(string.find('alo123alo', '^12') == nil)
+
+assert(string.match("aaab", ".*b") == "aaab")
+assert(string.match("aaa", ".*a") == "aaa")
+assert(string.match("b", ".*b") == "b")
+
+assert(string.match("aaab", ".+b") == "aaab")
+assert(string.match("aaa", ".+a") == "aaa")
+assert(not string.match("b", ".+b"))
+
+assert(string.match("aaab", ".?b") == "ab")
+assert(string.match("aaa", ".?a") == "aa")
+assert(string.match("b", ".?b") == "b")
+
+assert(f('aloALO', '%l*') == 'alo')
+assert(f('aLo_ALO', '%a*') == 'aLo')
+
+assert(f("  \n\r*&\n\r   xuxu  \n\n", "%g%g%g+") == "xuxu")
+
+assert(f('aaab', 'a*') == 'aaa');
+assert(f('aaa', '^.*$') == 'aaa');
+assert(f('aaa', 'b*') == '');
+assert(f('aaa', 'ab*a') == 'aa')
+assert(f('aba', 'ab*a') == 'aba')
+assert(f('aaab', 'a+') == 'aaa')
+assert(f('aaa', '^.+$') == 'aaa')
+assert(f('aaa', 'b+') == nil)
+assert(f('aaa', 'ab+a') == nil)
+assert(f('aba', 'ab+a') == 'aba')
+assert(f('a$a', '.$') == 'a')
+assert(f('a$a', '.%$') == 'a$')
+assert(f('a$a', '.$.') == 'a$a')
+assert(f('a$a', '$$') == nil)
+assert(f('a$b', 'a$') == nil)
+assert(f('a$a', '$') == '')
+assert(f('', 'b*') == '')
+assert(f('aaa', 'bb*') == nil)
+assert(f('aaab', 'a-') == '')
+assert(f('aaa', '^.-$') == 'aaa')
+assert(f('aabaaabaaabaaaba', 'b.*b') == 'baaabaaabaaab')
+assert(f('aabaaabaaabaaaba', 'b.-b') == 'baaab')
+assert(f('alo xo', '.o$') == 'xo')
+assert(f(' \n isto é assim', '%S%S*') == 'isto')
+assert(f(' \n isto é assim', '%S*$') == 'assim')
+assert(f(' \n isto é assim', '[a-z]*$') == 'assim')
+assert(f('um caracter ? extra', '[^%sa-z]') == '?')
+assert(f('', 'a?') == '')
+assert(f('á', 'á?') == 'á')
+assert(f('ábl', 'á?b?l?') == 'ábl')
+assert(f('  ábl', 'á?b?l?') == '')
+assert(f('aa', '^aa?a?a') == 'aa')
+assert(f(']]]áb', '[^]]') == 'á')
+assert(f("0alo alo", "%x*") == "0a")
+assert(f("alo alo", "%C+") == "alo alo")
+print('+')
+
+assert(f1('alo alx 123 b\0o b\0o', '(..*) %1') == "b\0o b\0o")
+assert(f1('axz123= 4= 4 34', '(.+)=(.*)=%2 %1') == '3= 4= 4 3')
+assert(f1('=======', '^(=*)=%1$') == '=======')
+assert(string.match('==========', '^([=]*)=%1$') == nil)
+
+local function range (i, j)
+  if i <= j then
+    return i, range(i+1, j)
+  end
+end
+
+local abc = string.char(range(0, 255));
+
+assert(string.len(abc) == 256)
+
+function strset (p)
+  local res = {s=''}
+  string.gsub(abc, p, function (c) res.s = res.s .. c end)
+  return res.s
+end;
+
+assert(string.len(strset('[\200-\210]')) == 11)
+
+assert(strset('[a-z]') == "abcdefghijklmnopqrstuvwxyz")
+assert(strset('[a-z%d]') == strset('[%da-uu-z]'))
+assert(strset('[a-]') == "-a")
+assert(strset('[^%W]') == strset('[%w]'))
+assert(strset('[]%%]') == '%]')
+assert(strset('[a%-z]') == '-az')
+assert(strset('[%^%[%-a%]%-b]') == '-[]^ab')
+assert(strset('%Z') == strset('[\1-\255]'))
+assert(strset('.') == strset('[\1-\255%z]'))
+print('+');
+
+assert(string.match("alo xyzK", "(%w+)K") == "xyz")
+assert(string.match("254 K", "(%d*)K") == "")
+assert(string.match("alo ", "(%w*)$") == "")
+assert(string.match("alo ", "(%w+)$") == nil)
+assert(string.find("(álo)", "%(á") == 1)
+local a, b, c, d, e = string.match("âlo alo", "^(((.).).* (%w*))$")
+assert(a == 'âlo alo' and b == 'âl' and c == 'â' and d == 'alo' and e == nil)
+a, b, c, d  = string.match('0123456789', '(.+(.?)())')
+assert(a == '0123456789' and b == '' and c == 11 and d == nil)
+print('+')
+
+assert(string.gsub('ülo ülo', 'ü', 'x') == 'xlo xlo')
+assert(string.gsub('alo úlo  ', ' +$', '') == 'alo úlo')  -- trim
+assert(string.gsub('  alo alo  ', '^%s*(.-)%s*$', '%1') == 'alo alo')  -- double trim
+assert(string.gsub('alo  alo  \n 123\n ', '%s+', ' ') == 'alo alo 123 ')
+t = "abç d"
+a, b = string.gsub(t, '(.)', '%1@')
+assert('@'..a == string.gsub(t, '', '@') and b == 5)
+a, b = string.gsub('abçd', '(.)', '%0@', 2)
+assert(a == 'a@b@çd' and b == 2)
+assert(string.gsub('alo alo', '()[al]', '%1') == '12o 56o')
+assert(string.gsub("abc=xyz", "(%w*)(%p)(%w+)", "%3%2%1-%0") ==
+              "xyz=abc-abc=xyz")
+assert(string.gsub("abc", "%w", "%1%0") == "aabbcc")
+assert(string.gsub("abc", "%w+", "%0%1") == "abcabc")
+assert(string.gsub('áéí', '$', '\0óú') == 'áéí\0óú')
+assert(string.gsub('', '^', 'r') == 'r')
+assert(string.gsub('', '$', 'r') == 'r')
+print('+')
+
+assert(string.gsub("um (dois) tres (quatro)", "(%(%w+%))", string.upper) ==
+            "um (DOIS) tres (QUATRO)")
+
+do
+  local function setglobal (n,v) rawset(_G, n, v) end
+  string.gsub("a=roberto,roberto=a", "(%w+)=(%w%w*)", setglobal)
+  assert(_G.a=="roberto" and _G.roberto=="a")
+end
+
+function f(a,b) return string.gsub(a,'.',b) end
+assert(string.gsub("trocar tudo em |teste|b| é |beleza|al|", "|([^|]*)|([^|]*)|", f) ==
+            "trocar tudo em bbbbb é alalalalalal")
+
+local function dostring (s) return load(s)() or "" end
+assert(string.gsub("alo $a=1$ novamente $return a$", "$([^$]*)%$", dostring) ==
+            "alo  novamente 1")
+
+x = string.gsub("$x=string.gsub('alo', '.', string.upper)$ assim vai para $return x$",
+         "$([^$]*)%$", dostring)
+assert(x == ' assim vai para ALO')
+
+t = {}
+s = 'a alo jose  joao'
+r = string.gsub(s, '()(%w+)()', function (a,w,b)
+      assert(string.len(w) == b-a);
+      t[a] = b-a;
+    end)
+assert(s == r and t[1] == 1 and t[3] == 3 and t[7] == 4 and t[13] == 4)
+
+
+function isbalanced (s)
+  return string.find(string.gsub(s, "%b()", ""), "[()]") == nil
+end
+
+assert(isbalanced("(9 ((8))(\0) 7) \0\0 a b ()(c)() a"))
+assert(not isbalanced("(9 ((8) 7) a b (\0 c) a"))
+assert(string.gsub("alo 'oi' alo", "%b''", '"') == 'alo " alo')
+
+
+local t = {"apple", "orange", "lime"; n=0}
+assert(string.gsub("x and x and x", "x", function () t.n=t.n+1; return t[t.n] end)
+        == "apple and orange and lime")
+
+t = {n=0}
+string.gsub("first second word", "%w%w*", function (w) t.n=t.n+1; t[t.n] = w end)
+assert(t[1] == "first" and t[2] == "second" and t[3] == "word" and t.n == 3)
+
+t = {n=0}
+assert(string.gsub("first second word", "%w+",
+         function (w) t.n=t.n+1; t[t.n] = w end, 2) == "first second word")
+assert(t[1] == "first" and t[2] == "second" and t[3] == nil)
+
+assert(not pcall(string.gsub, "alo", "(.", print))
+assert(not pcall(string.gsub, "alo", ".)", print))
+assert(not pcall(string.gsub, "alo", "(.", {}))
+assert(not pcall(string.gsub, "alo", "(.)", "%2"))
+assert(not pcall(string.gsub, "alo", "(%1)", "a"))
+assert(not pcall(string.gsub, "alo", "(%0)", "a"))
+
+-- bug since 2.5 (C-stack overflow)
+do
+  local function f (size)
+    local s = string.rep("a", size)
+    local p = string.rep(".?", size)
+    return pcall(string.match, s, p)
+  end
+  local r, m = f(80)
+  assert(r and #m == 80)
+  r, m = f(200000)
+  assert(not r and string.find(m, "too complex"))
+end
+
+if not _soft then
+  -- big strings
+  local a = string.rep('a', 300000)
+  assert(string.find(a, '^a*.?$'))
+  assert(not string.find(a, '^a*.?b$'))
+  assert(string.find(a, '^a-.?$'))
+
+  -- bug in 5.1.2
+  a = string.rep('a', 10000) .. string.rep('b', 10000)
+  assert(not pcall(string.gsub, a, 'b'))
+end
+
+-- recursive nest of gsubs
+function rev (s)
+  return string.gsub(s, "(.)(.+)", function (c,s1) return rev(s1)..c end)
+end
+
+local x = "abcdef"
+assert(rev(rev(x)) == x)
+
+
+-- gsub with tables
+assert(string.gsub("alo alo", ".", {}) == "alo alo")
+assert(string.gsub("alo alo", "(.)", {a="AA", l=""}) == "AAo AAo")
+assert(string.gsub("alo alo", "(.).", {a="AA", l="K"}) == "AAo AAo")
+assert(string.gsub("alo alo", "((.)(.?))", {al="AA", o=false}) == "AAo AAo")
+
+assert(string.gsub("alo alo", "().", {2,5,6}) == "256 alo")
+
+t = {}; setmetatable(t, {__index = function (t,s) return string.upper(s) end})
+assert(string.gsub("a alo b hi", "%w%w+", t) == "a ALO b HI")
+
+
+-- tests for gmatch
+local a = 0
+for i in string.gmatch('abcde', '()') do assert(i == a+1); a=i end
+assert(a==6)
+
+t = {n=0}
+for w in string.gmatch("first second word", "%w+") do
+      t.n=t.n+1; t[t.n] = w
+end
+assert(t[1] == "first" and t[2] == "second" and t[3] == "word")
+
+t = {3, 6, 9}
+for i in string.gmatch ("xuxx uu ppar r", "()(.)%2") do
+  assert(i == table.remove(t, 1))
+end
+assert(#t == 0)
+
+t = {}
+for i,j in string.gmatch("13 14 10 = 11, 15= 16, 22=23", "(%d+)%s*=%s*(%d+)") do
+  t[i] = j
+end
+a = 0
+for k,v in pairs(t) do assert(k+1 == v+0); a=a+1 end
+assert(a == 3)
+
+
+-- tests for `%f' (`frontiers')
+
+assert(string.gsub("aaa aa a aaa a", "%f[%w]a", "x") == "xaa xa x xaa x")
+assert(string.gsub("[[]] [][] [[[[", "%f[[].", "x") == "x[]] x]x] x[[[")
+assert(string.gsub("01abc45de3", "%f[%d]", ".") == ".01abc.45de.3")
+assert(string.gsub("01abc45 de3x", "%f[%D]%w", ".") == "01.bc45 de3.")
+assert(string.gsub("function", "%f[\1-\255]%w", ".") == ".unction")
+assert(string.gsub("function", "%f[^\1-\255]", ".") == "function.")
+
+assert(string.find("a", "%f[a]") == 1)
+assert(string.find("a", "%f[^%z]") == 1)
+assert(string.find("a", "%f[^%l]") == 2)
+assert(string.find("aba", "%f[a%z]") == 3)
+assert(string.find("aba", "%f[%z]") == 4)
+assert(not string.find("aba", "%f[%l%z]"))
+assert(not string.find("aba", "%f[^%l%z]"))
+
+local i, e = string.find(" alo aalo allo", "%f[%S].-%f[%s].-%f[%S]")
+assert(i == 2 and e == 5)
+local k = string.match(" alo aalo allo", "%f[%S](.-%f[%s].-%f[%S])")
+assert(k == 'alo ')
+
+local a = {1, 5, 9, 14, 17,}
+for k in string.gmatch("alo alo th02 is 1hat", "()%f[%w%d]") do
+  assert(table.remove(a, 1) == k)
+end
+assert(#a == 0)
+
+
+-- malformed patterns
+local function malform (p, m)
+  m = m or "malformed"
+  local r, msg = pcall(string.find, "a", p)
+  assert(not r and string.find(msg, m))
+end
+
+malform("[a")
+malform("[]")
+malform("[^]")
+malform("[a%]")
+malform("[a%")
+malform("%b")
+malform("%ba")
+malform("%")
+malform("%f", "missing")
+
+-- \0 in patterns
+assert(string.match("ab\0\1\2c", "[\0-\2]+") == "\0\1\2")
+assert(string.match("ab\0\1\2c", "[\0-\0]+") == "\0")
+assert(string.find("b$a", "$\0?") == 2)
+assert(string.find("abc\0efg", "%\0") == 4)
+assert(string.match("abc\0efg\0\1e\1g", "%b\0\1") == "\0efg\0\1e\1")
+assert(string.match("abc\0\0\0", "%\0+") == "\0\0\0")
+assert(string.match("abc\0\0\0", "%\0%\0?") == "\0\0")
+
+-- magic char after \0
+assert(string.find("abc\0\0","\0.") == 4)
+assert(string.find("abcx\0\0abc\0abc","x\0\0abc\0a.") == 4)
+
+print('OK')
+

tests/Lua.Tests/tests-lua/sort.lua

@@ -0,0 +1,167 @@
+print "testing (parts of) table library"
+
+print "testing unpack"
+
+local unpack = table.unpack
+
+local x,y,z,a,n
+a = {}; lim = 2000
+for i=1, lim do a[i]=i end
+assert(select(lim, unpack(a)) == lim and select('#', unpack(a)) == lim)
+x = unpack(a)
+assert(x == 1)
+x = {unpack(a)}
+assert(#x == lim and x[1] == 1 and x[lim] == lim)
+x = {unpack(a, lim-2)}
+assert(#x == 3 and x[1] == lim-2 and x[3] == lim)
+x = {unpack(a, 10, 6)}
+assert(next(x) == nil)   -- no elements
+x = {unpack(a, 11, 10)}
+assert(next(x) == nil)   -- no elements
+x,y = unpack(a, 10, 10)
+assert(x == 10 and y == nil)
+x,y,z = unpack(a, 10, 11)
+assert(x == 10 and y == 11 and z == nil)
+a,x = unpack{1}
+assert(a==1 and x==nil)
+a,x = unpack({1,2}, 1, 1)
+assert(a==1 and x==nil)
+
+if not _no32 then
+  assert(not pcall(unpack, {}, 0, 2^31-1))
+  assert(not pcall(unpack, {}, 1, 2^31-1))
+  assert(not pcall(unpack, {}, -(2^31), 2^31-1))
+  assert(not pcall(unpack, {}, -(2^31 - 1), 2^31-1))
+  assert(pcall(unpack, {}, 2^31-1, 0))
+  assert(pcall(unpack, {}, 2^31-1, 1))
+  pcall(unpack, {}, 1, 2^31)
+  a, b = unpack({[2^31-1] = 20}, 2^31-1, 2^31-1)
+  assert(a == 20 and b == nil)
+  a, b = unpack({[2^31-1] = 20}, 2^31-2, 2^31-1)
+  assert(a == nil and b == 20)
+end
+
+print "testing pack"
+
+a = table.pack()
+assert(a[1] == nil and a.n == 0) 
+
+a = table.pack(table)
+assert(a[1] == table and a.n == 1)
+
+a = table.pack(nil, nil, nil, nil)
+assert(a[1] == nil and a.n == 4)
+
+
+print"testing sort"
+
+
+-- test checks for invalid order functions
+local function check (t)
+  local function f(a, b) assert(a and b); return true end
+  local s, e = pcall(table.sort, t, f)
+  assert(not s and e:find("invalid order function"))
+end
+
+check{1,2,3,4}
+check{1,2,3,4,5}
+check{1,2,3,4,5,6}
+
+
+function check (a, f)
+  f = f or function (x,y) return x<y end;
+  for n = #a, 2, -1 do
+    assert(not f(a[n], a[n-1]))
+  end
+end
+
+a = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep",
+     "Oct", "Nov", "Dec"}
+
+table.sort(a)
+check(a)
+
+function perm (s, n)
+  n = n or #s
+  if n == 1 then
+    local t = {unpack(s)}
+    table.sort(t)
+    check(t)
+  else
+    for i = 1, n do
+      s[i], s[n] = s[n], s[i]
+      perm(s, n - 1)
+      s[i], s[n] = s[n], s[i]
+    end
+  end
+end
+
+perm{}
+perm{1}
+perm{1,2}
+perm{1,2,3}
+perm{1,2,3,4}
+perm{2,2,3,4}
+perm{1,2,3,4,5}
+perm{1,2,3,3,5}
+perm{1,2,3,4,5,6}
+perm{2,2,3,3,5,6}
+
+limit = 30000
+if _soft then limit = 5000 end
+
+a = {}
+for i=1,limit do
+  a[i] = math.random()
+end
+
+local x = os.clock()
+table.sort(a)
+print(string.format("Sorting %d elements in %.2f sec.", limit, os.clock()-x))
+check(a)
+
+x = os.clock()
+table.sort(a)
+print(string.format("Re-sorting %d elements in %.2f sec.", limit, os.clock()-x))
+check(a)
+
+a = {}
+for i=1,limit do
+  a[i] = math.random()
+end
+
+x = os.clock(); i=0
+table.sort(a, function(x,y) i=i+1; return y<x end)
+print(string.format("Invert-sorting other %d elements in %.2f sec., with %i comparisons",
+      limit, os.clock()-x, i))
+check(a, function(x,y) return y<x end)
+
+
+table.sort{}  -- empty array
+
+for i=1,limit do a[i] = false end
+x = os.clock();
+table.sort(a, function(x,y) return nil end)
+print(string.format("Sorting %d equal elements in %.2f sec.", limit, os.clock()-x))
+check(a, function(x,y) return nil end)
+for i,v in pairs(a) do assert(not v or i=='n' and v==limit) end
+
+A = {"álo", "\0first :-)", "alo", "then this one", "45", "and a new"}
+table.sort(A)
+check(A)
+
+table.sort(A, function (x, y)
+          load(string.format("A[%q] = ''", x))()
+          collectgarbage()
+          return x<y
+        end)
+
+
+tt = {__lt = function (a,b) return a.val < b.val end}
+a = {}
+for i=1,10 do  a[i] = {val=math.random(100)}; setmetatable(a[i], tt); end
+table.sort(a)
+check(a, tt.__lt)
+check(a)
+
+print"OK"

tests/Lua.Tests/tests-lua/strings.lua

@@ -0,0 +1,281 @@
+print('testing strings and string library')
+
+assert('alo' < 'alo1')
+assert('' < 'a')
+assert('alo\0alo' < 'alo\0b')
+assert('alo\0alo\0\0' > 'alo\0alo\0')
+assert('alo' < 'alo\0')
+assert('alo\0' > 'alo')
+assert('\0' < '\1')
+assert('\0\0' < '\0\1')
+assert('\1\0a\0a' <= '\1\0a\0a')
+assert(not ('\1\0a\0b' <= '\1\0a\0a'))
+assert('\0\0\0' < '\0\0\0\0')
+assert(not('\0\0\0\0' < '\0\0\0'))
+assert('\0\0\0' <= '\0\0\0\0')
+assert(not('\0\0\0\0' <= '\0\0\0'))
+assert('\0\0\0' <= '\0\0\0')
+assert('\0\0\0' >= '\0\0\0')
+assert(not ('\0\0b' < '\0\0a\0'))
+print('+')
+
+assert(string.sub("123456789",2,4) == "234")
+assert(string.sub("123456789",7) == "789")
+assert(string.sub("123456789",7,6) == "")
+assert(string.sub("123456789",7,7) == "7")
+assert(string.sub("123456789",0,0) == "")
+assert(string.sub("123456789",-10,10) == "123456789")
+assert(string.sub("123456789",1,9) == "123456789")
+assert(string.sub("123456789",-10,-20) == "")
+assert(string.sub("123456789",-1) == "9")
+assert(string.sub("123456789",-4) == "6789")
+assert(string.sub("123456789",-6, -4) == "456")
+if not _no32 then
+  assert(string.sub("123456789",-2^31, -4) == "123456")
+  assert(string.sub("123456789",-2^31, 2^31 - 1) == "123456789")
+  assert(string.sub("123456789",-2^31, -2^31) == "")
+end
+assert(string.sub("\000123456789",3,5) == "234")
+assert(("\000123456789"):sub(8) == "789")
+print('+')
+
+assert(string.find("123456789", "345") == 3)
+a,b = string.find("123456789", "345")
+assert(string.sub("123456789", a, b) == "345")
+assert(string.find("1234567890123456789", "345", 3) == 3)
+assert(string.find("1234567890123456789", "345", 4) == 13)
+assert(string.find("1234567890123456789", "346", 4) == nil)
+assert(string.find("1234567890123456789", ".45", -9) == 13)
+assert(string.find("abcdefg", "\0", 5, 1) == nil)
+assert(string.find("", "") == 1)
+assert(string.find("", "", 1) == 1)
+assert(not string.find("", "", 2))
+assert(string.find('', 'aaa', 1) == nil)
+assert(('alo(.)alo'):find('(.)', 1, 1) == 4)
+print('+')
+
+assert(string.len("") == 0)
+assert(string.len("\0\0\0") == 3)
+assert(string.len("1234567890") == 10)
+
+assert(#"" == 0)
+assert(#"\0\0\0" == 3)
+assert(#"1234567890" == 10)
+
+assert(string.byte("a") == 97)
+assert(string.byte("\xe4") > 127)
+assert(string.byte(string.char(255)) == 255)
+assert(string.byte(string.char(0)) == 0)
+assert(string.byte("\0") == 0)
+assert(string.byte("\0\0alo\0x", -1) == string.byte('x'))
+assert(string.byte("ba", 2) == 97)
+assert(string.byte("\n\n", 2, -1) == 10)
+assert(string.byte("\n\n", 2, 2) == 10)
+assert(string.byte("") == nil)
+assert(string.byte("hi", -3) == nil)
+assert(string.byte("hi", 3) == nil)
+assert(string.byte("hi", 9, 10) == nil)
+assert(string.byte("hi", 2, 1) == nil)
+assert(string.char() == "")
+assert(string.char(0, 255, 0) == "\0\255\0")
+assert(string.char(0, string.byte("\xe4"), 0) == "\0\xe4\0")
+assert(string.char(string.byte("\xe4l\0óu", 1, -1)) == "\xe4l\0óu")
+assert(string.char(string.byte("\xe4l\0óu", 1, 0)) == "")
+assert(string.char(string.byte("\xe4l\0óu", -10, 100)) == "\xe4l\0óu")
+print('+')
+
+assert(string.upper("ab\0c") == "AB\0C")
+assert(string.lower("\0ABCc%$") == "\0abcc%$")
+assert(string.rep('teste', 0) == '')
+assert(string.rep('tés\00tê', 2) == 'tés\0têtés\000tê')
+assert(string.rep('', 10) == '')
+
+-- repetitions with separator
+assert(string.rep('teste', 0, 'xuxu') == '')
+assert(string.rep('teste', 1, 'xuxu') == 'teste')
+assert(string.rep('\1\0\1', 2, '\0\0') == '\1\0\1\0\0\1\0\1')
+assert(string.rep('', 10, '.') == string.rep('.', 9))
+if not _no32 then
+  assert(not pcall(string.rep, "aa", 2^30))
+  assert(not pcall(string.rep, "", 2^30, "aa"))
+end
+
+assert(string.reverse"" == "")
+assert(string.reverse"\0\1\2\3" == "\3\2\1\0")
+assert(string.reverse"\0001234" == "4321\0")
+
+for i=0,30 do assert(string.len(string.rep('a', i)) == i) end
+
+assert(type(tostring(nil)) == 'string')
+assert(type(tostring(12)) == 'string')
+assert(''..12 == '12' and type(12 .. '') == 'string')
+assert(string.find(tostring{}, 'table:'))
+assert(string.find(tostring(print), 'function:'))
+assert(tostring(1234567890123) == '1234567890123')
+assert(#tostring('\0') == 1)
+assert(tostring(true) == "true")
+assert(tostring(false) == "false")
+print('+')
+
+x = '"ílo"\n\\'
+assert(string.format('%q%s', x, x) == '"\\"ílo\\"\\\n\\\\""ílo"\n\\')
+assert(string.format('%q', "\0") == [["\0"]])
+assert(load(string.format('return %q', x))() == x)
+x = "\0\1\0023\5\0009"
+assert(load(string.format('return %q', x))() == x)
+assert(string.format("\0%c\0%c%x\0", string.byte("\xe4"), string.byte("b"), 140) ==
+              "\0\xe4\0b8c\0")
+assert(string.format('') == "")
+assert(string.format("%c",34)..string.format("%c",48)..string.format("%c",90)..string.format("%c",100) ==
+       string.format("%c%c%c%c", 34, 48, 90, 100))
+assert(string.format("%s\0 is not \0%s", 'not be', 'be') == 'not be\0 is not \0be')
+assert(string.format("%%%d %010d", 10, 23) == "%10 0000000023")
+assert(tonumber(string.format("%f", 10.3)) == 10.3)
+x = string.format('"%-50s"', 'a')
+assert(#x == 52)
+assert(string.sub(x, 1, 4) == '"a  ')
+
+assert(string.format("-%.20s.20s", string.rep("%", 2000)) ==
+                     "-"..string.rep("%", 20)..".20s")
+assert(string.format('"-%20s.20s"', string.rep("%", 2000)) ==
+       string.format("%q", "-"..string.rep("%", 2000)..".20s"))
+
+-- format x tostring
+assert(string.format("%s %s", nil, true) == "nil true")
+assert(string.format("%s %.4s", false, true) == "false true")
+assert(string.format("%.3s %.3s", false, true) == "fal tru")
+local m = setmetatable({}, {__tostring = function () return "hello" end})
+assert(string.format("%s %.10s", m, m) == "hello hello")
+
+
+assert(string.format("%x", 0.3) == "0")
+assert(string.format("%02x", 0.1) == "00")
+assert(string.format("%08X", 2^32 - 1) == "FFFFFFFF")
+assert(string.format("%+08d", 2^31 - 1) == "+2147483647")
+assert(string.format("%+08d", -2^31) == "-2147483648")
+
+
+-- longest number that can be formated
+assert(string.len(string.format('%99.99f', -1e308)) >= 100)
+
+
+
+if not _nolonglong then
+  print("testing large numbers for format")
+  assert(string.format("%8x", 2^52 - 1) == "fffffffffffff")
+  assert(string.format("%d", -1) == "-1")
+  assert(tonumber(string.format("%u", 2^62)) == 2^62)
+  assert(string.format("%8x", 0xffffffff) == "ffffffff")
+  assert(string.format("%8x", 0x7fffffff) == "7fffffff")
+  assert(string.format("%d", 2^53) == "9007199254740992")
+  assert(string.format("%d", -2^53) == "-9007199254740992")
+  assert(string.format("0x%8X", 0x8f000003) == "0x8F000003")
+  -- maximum integer that fits both in 64-int and (exact) double
+  local x = 2^64 - 2^(64-53)
+  assert(x == 0xfffffffffffff800)
+  assert(tonumber(string.format("%u", x)) == x)
+  assert(tonumber(string.format("0X%x", x)) == x)
+  assert(string.format("%x", x) == "fffffffffffff800")
+  assert(string.format("%d", x/2) == "9223372036854774784")
+  assert(string.format("%d", -x/2) == "-9223372036854774784")
+  assert(string.format("%d", -2^63) == "-9223372036854775808")
+  assert(string.format("%x", 2^63) == "8000000000000000")
+end
+
+if not _noformatA then
+  print("testing 'format %a %A'")
+  assert(string.format("%.2a", 0.5) == "0x1.00p-1")
+  assert(string.format("%A", 0x1fffffffffffff) == "0X1.FFFFFFFFFFFFFP+52")
+  assert(string.format("%.4a", -3) == "-0x1.8000p+1")
+  assert(tonumber(string.format("%a", -0.1)) == -0.1)
+end
+
+-- errors in format
+
+local function check (fmt, msg)
+  local s, err = pcall(string.format, fmt, 10)
+  assert(not s and string.find(err, msg))
+end
+
+local aux = string.rep('0', 600)
+check("%100.3d", "too long")
+check("%1"..aux..".3d", "too long")
+check("%1.100d", "too long")
+check("%10.1"..aux.."004d", "too long")
+check("%t", "invalid option")
+check("%"..aux.."d", "repeated flags")
+check("%d %d", "no value")
+
+
+-- integers out of range
+assert(not pcall(string.format, "%d", 2^63))
+assert(not pcall(string.format, "%x", 2^64))
+assert(not pcall(string.format, "%x", -2^64))
+assert(not pcall(string.format, "%x", -1))
+
+
+assert(load("return 1\n--comentário sem EOL no final")() == 1)
+
+
+assert(table.concat{} == "")
+assert(table.concat({}, 'x') == "")
+assert(table.concat({'\0', '\0\1', '\0\1\2'}, '.\0.') == "\0.\0.\0\1.\0.\0\1\2")
+local a = {}; for i=1,3000 do a[i] = "xuxu" end
+assert(table.concat(a, "123").."123" == string.rep("xuxu123", 3000))
+assert(table.concat(a, "b", 20, 20) == "xuxu")
+assert(table.concat(a, "", 20, 21) == "xuxuxuxu")
+assert(table.concat(a, "x", 22, 21) == "")
+assert(table.concat(a, "3", 2999) == "xuxu3xuxu")
+if not _no32 then
+  assert(table.concat({}, "x", 2^31-1, 2^31-2) == "")
+  assert(table.concat({}, "x", -2^31+1, -2^31) == "")
+  assert(table.concat({}, "x", 2^31-1, -2^31) == "")
+  assert(table.concat({[2^31-1] = "alo"}, "x", 2^31-1, 2^31-1) == "alo")
+end
+
+assert(not pcall(table.concat, {"a", "b", {}}))
+
+a = {"a","b","c"}
+assert(table.concat(a, ",", 1, 0) == "")
+assert(table.concat(a, ",", 1, 1) == "a")
+assert(table.concat(a, ",", 1, 2) == "a,b")
+assert(table.concat(a, ",", 2) == "b,c")
+assert(table.concat(a, ",", 3) == "c")
+assert(table.concat(a, ",", 4) == "")
+
+if not _port then
+
+local locales = { "ptb", "ISO-8859-1", "pt_BR" }
+local function trylocale (w)
+  for i = 1, #locales do
+    if os.setlocale(locales[i], w) then return true end
+  end
+  return false
+end
+
+if not trylocale("collate")  then
+  print("locale not supported")
+else
+  assert("alo" < "álo" and "álo" < "amo")
+end
+
+if not trylocale("ctype") then
+  print("locale not supported")
+else
+  assert(load("a = 3.4"));  -- parser should not change outside locale
+  assert(not load("á = 3.4"));  -- even with errors
+  assert(string.gsub("áéíóú", "%a", "x") == "xxxxx")
+  assert(string.gsub("áÁéÉ", "%l", "x") == "xÁxÉ")
+  assert(string.gsub("áÁéÉ", "%u", "x") == "áxéx")
+  assert(string.upper"áÁé{xuxu}ção" == "ÁÁÉ{XUXU}ÇÃO")
+end
+
+os.setlocale("C")
+assert(os.setlocale() == 'C')
+assert(os.setlocale(nil, "numeric") == 'C')
+
+end
+
+print('OK')
+
+

tests/Lua.Tests/tests-lua/vararg.lua

@@ -0,0 +1,125 @@
+print('testing vararg')
+
+_G.arg = nil
+
+function f(a, ...)
+  local arg = {n = select('#', ...), ...}
+  for i=1,arg.n do assert(a[i]==arg[i]) end
+  return arg.n
+end
+
+function c12 (...)
+  assert(arg == nil)
+  local x = {...}; x.n = #x
+  local res = (x.n==2 and x[1] == 1 and x[2] == 2)
+  if res then res = 55 end
+  return res, 2
+end
+
+function vararg (...) return {n = select('#', ...), ...} end
+
+local call = function (f, args) return f(table.unpack(args, 1, args.n)) end
+
+assert(f() == 0)
+assert(f({1,2,3}, 1, 2, 3) == 3)
+assert(f({"alo", nil, 45, f, nil}, "alo", nil, 45, f, nil) == 5)
+
+assert(c12(1,2)==55)
+a,b = assert(call(c12, {1,2}))
+assert(a == 55 and b == 2)
+a = call(c12, {1,2;n=2})
+assert(a == 55 and b == 2)
+a = call(c12, {1,2;n=1})
+assert(not a)
+assert(c12(1,2,3) == false)
+local a = vararg(call(next, {_G,nil;n=2}))
+local b,c = next(_G)
+assert(a[1] == b and a[2] == c and a.n == 2)
+a = vararg(call(call, {c12, {1,2}}))
+assert(a.n == 2 and a[1] == 55 and a[2] == 2)
+a = call(print, {'+'})
+assert(a == nil)
+
+local t = {1, 10}
+function t:f (...) local arg = {...}; return self[...]+#arg end
+assert(t:f(1,4) == 3 and t:f(2) == 11)
+print('+')
+
+lim = 20
+local i, a = 1, {}
+while i <= lim do a[i] = i+0.3; i=i+1 end
+
+function f(a, b, c, d, ...)
+  local more = {...}
+  assert(a == 1.3 and more[1] == 5.3 and
+         more[lim-4] == lim+0.3 and not more[lim-3])
+end
+
+function g(a,b,c)
+  assert(a == 1.3 and b == 2.3 and c == 3.3)
+end
+
+call(f, a)
+call(g, a)
+
+a = {}
+i = 1
+while i <= lim do a[i] = i; i=i+1 end
+assert(call(math.max, a) == lim)
+
+print("+")
+
+
+-- new-style varargs
+
+function oneless (a, ...) return ... end
+
+function f (n, a, ...)
+  local b
+  assert(arg == nil)
+  if n == 0 then
+    local b, c, d = ...
+    return a, b, c, d, oneless(oneless(oneless(...)))
+  else
+    n, b, a = n-1, ..., a
+    assert(b == ...)
+    return f(n, a, ...)
+  end
+end
+
+a,b,c,d,e = assert(f(10,5,4,3,2,1))
+assert(a==5 and b==4 and c==3 and d==2 and e==1)
+
+a,b,c,d,e = f(4)
+assert(a==nil and b==nil and c==nil and d==nil and e==nil)
+
+
+-- varargs for main chunks
+f = load[[ return {...} ]]
+x = f(2,3)
+assert(x[1] == 2 and x[2] == 3 and x[3] == nil)
+
+
+f = load[[
+  local x = {...}
+  for i=1,select('#', ...) do assert(x[i] == select(i, ...)) end
+  assert(x[select('#', ...)+1] == nil)
+  return true
+]]
+
+assert(f("a", "b", nil, {}, assert))
+assert(f())
+
+a = {select(3, table.unpack{10,20,30,40})}
+assert(#a == 2 and a[1] == 30 and a[2] == 40)
+a = {select(1)}
+assert(next(a) == nil)
+a = {select(-1, 3, 5, 7)}
+assert(a[1] == 7 and a[2] == nil)
+a = {select(-2, 3, 5, 7)}
+assert(a[1] == 5 and a[2] == 7 and a[3] == nil)
+pcall(select, 10000)
+pcall(select, -10000)
+
+print('OK')
+

tests/Lua.Tests/tests-lua/verybig.lua

@@ -0,0 +1,144 @@
+print "testing RK"
+
+-- testing opcodes with RK arguments larger than K limit
+local function foo ()
+  local dummy = {
+     -- fill first 256 entries in table of constants
+     1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
+     17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32,
+     33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48,
+     49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64,
+     65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80,
+     81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96,
+     97, 98, 99, 100, 101, 102, 103, 104,
+     105, 106, 107, 108, 109, 110, 111, 112,
+     113, 114, 115, 116, 117, 118, 119, 120,
+     121, 122, 123, 124, 125, 126, 127, 128,
+     129, 130, 131, 132, 133, 134, 135, 136,
+     137, 138, 139, 140, 141, 142, 143, 144,
+     145, 146, 147, 148, 149, 150, 151, 152,
+     153, 154, 155, 156, 157, 158, 159, 160,
+     161, 162, 163, 164, 165, 166, 167, 168,
+     169, 170, 171, 172, 173, 174, 175, 176,
+     177, 178, 179, 180, 181, 182, 183, 184,
+     185, 186, 187, 188, 189, 190, 191, 192,
+     193, 194, 195, 196, 197, 198, 199, 200,
+     201, 202, 203, 204, 205, 206, 207, 208,
+     209, 210, 211, 212, 213, 214, 215, 216,
+     217, 218, 219, 220, 221, 222, 223, 224,
+     225, 226, 227, 228, 229, 230, 231, 232,
+     233, 234, 235, 236, 237, 238, 239, 240,
+     241, 242, 243, 244, 245, 246, 247, 248,
+     249, 250, 251, 252, 253, 254, 255, 256,
+  }
+  assert(24.5 + 0.6 == 25.1)
+  local t = {foo = function (self, x) return x + self.x end, x = 10}
+  t.t = t
+  assert(t:foo(1.5) == 11.5)
+  assert(t.t:foo(0.5) == 10.5)   -- bug in 5.2 alpha
+  assert(24.3 == 24.3)
+  assert((function () return t.x end)() == 10)
+end
+
+
+foo()
+foo = nil
+
+if _soft then return 10 end
+
+print "testing large programs (>64k)"
+
+-- template to create a very big test file
+prog = [[$
+
+local a,b
+
+b = {$1$
+  b30009 = 65534,
+  b30010 = 65535,
+  b30011 = 65536,
+  b30012 = 65537,
+  b30013 = 16777214,
+  b30014 = 16777215,
+  b30015 = 16777216,
+  b30016 = 16777217,
+  b30017 = 4294967294,
+  b30018 = 4294967295,
+  b30019 = 4294967296,
+  b30020 = 4294967297,
+  b30021 = -65534,
+  b30022 = -65535,
+  b30023 = -65536,
+  b30024 = -4294967297,
+  b30025 = 15012.5,
+  $2$
+};
+
+assert(b.a50008 == 25004 and b["a11"] == 5.5)
+assert(b.a33007 == 16503.5 and b.a50009 == 25004.5)
+assert(b["b"..30024] == -4294967297)
+
+function b:xxx (a,b) return a+b end
+assert(b:xxx(10, 12) == 22)   -- pushself with non-constant index
+b.xxx = nil
+
+s = 0; n=0
+for a,b in pairs(b) do s=s+b; n=n+1 end
+assert(s==13977183656.5  and n==70001)
+
+
+a = nil; b = nil
+print'+'
+
+function f(x) b=x end
+
+a = f{$3$} or 10
+
+assert(a==10)
+assert(b[1] == "a10" and b[2] == 5 and b[#b-1] == "a50009")
+
+
+function xxxx (x) return b[x] end
+
+assert(xxxx(3) == "a11")
+
+a = nil; b=nil
+xxxx = nil
+
+return 10
+
+]]
+
+-- functions to fill in the $n$
+F = {
+function ()   -- $1$
+  for i=10,50009 do
+    io.write('a', i, ' = ', 5+((i-10)/2), ',\n')
+  end
+end,
+
+function ()   -- $2$
+  for i=30026,50009 do
+    io.write('b', i, ' = ', 15013+((i-30026)/2), ',\n')
+  end
+end,
+
+function ()   -- $3$
+  for i=10,50009 do
+    io.write('"a', i, '", ', 5+((i-10)/2), ',\n')
+  end
+end,
+}
+
+file = os.tmpname()
+io.output(file)
+for s in string.gmatch(prog, "$([^$]+)") do
+  local n = tonumber(s)
+  if not n then io.write(s) else F[n]() end
+end
+io.close()
+result = dofile(file)
+assert(os.remove(file))
+print'OK'
+return result
+