[Lua] Add support for Lua 5.2 (patch SF#3514593 from Miles Bader)

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@12968 626c5289-ae23-0410-ae9c-e8d60b6d4f22

CHANGES.current

@@ -5,6 +5,9 @@ See the RELEASENOTES file for a summary of changes in each release.
 Version 2.0.5 (in progress)
 ===========================
 
+2012-04-05: olly
+	    [Lua] Add support for Lua 5.2 (patch SF#3514593 from Miles Bader)
+
 2012-03-26: xavier98
 	    [octave] Apply patch #3425993 from jgillis: add extra logic to the octave_swig_type::dims(void) method: it checks if the user has defined a __dims__ method and uses this in stead of returning (1,1)
 	    [octave] Apply patch #3424833 from jgillis: make is_object return true for swig types

Examples/test-suite/lua/abstract_access_runme.lua

@@ -2,7 +2,9 @@ require("import")	-- the import fn
 import("abstract_access")	-- import code
 
 -- catch "undefined" global variables
-setmetatable(getfenv(),{__index=function (t,i) error("undefined global variable `"..i.."'",2) end})
+local env = _ENV -- Lua 5.2
+if not env then env = getfenv () end -- Lua 5.1
+setmetatable(env, {__index=function (t,i) error("undefined global variable `"..i.."'",2) end})
 
 -- trying to instantiate pure virual classes
 -- should fail

Examples/test-suite/lua/cpp_basic_runme.lua

@@ -3,7 +3,9 @@ import("cpp_basic")	-- import code
 cb=cpp_basic    -- renaming import
 
 -- catch "undefined" global variables
-setmetatable(getfenv(),{__index=function (t,i) error("undefined global variable `"..i.."'",2) end})
+local env = _ENV -- Lua 5.2
+if not env then env = getfenv () end -- Lua 5.1
+setmetatable(env, {__index=function (t,i) error("undefined global variable `"..i.."'",2) end})
 
 f=cb.Foo(4)
 assert(f.num==4)

Examples/test-suite/lua/disown_runme.lua

@@ -2,7 +2,9 @@ require("import")	-- the import fn
 import("disown")	-- import code
 
 -- catch "undefined" global variables
-setmetatable(getfenv(),{__index=function (t,i) error("undefined global variable `"..i.."'",2) end})
+local env = _ENV -- Lua 5.2
+if not env then env = getfenv () end -- Lua 5.1
+setmetatable(env, {__index=function (t,i) error("undefined global variable `"..i.."'",2) end})
 
 for x=0,100 do
     a=disown.A()

Examples/test-suite/lua/enums_runme.lua

@@ -2,7 +2,9 @@ require("import")	-- the import fn
 import("enums")	-- import lib
 
 -- catch "undefined" global variables
-setmetatable(getfenv(),{__index=function (t,i) error("undefined global variable `"..i.."'",2) end})
+local env = _ENV -- Lua 5.2
+if not env then env = getfenv () end -- Lua 5.1
+setmetatable(env, {__index=function (t,i) error("undefined global variable `"..i.."'",2) end})
 
 -- check values
 assert(enums.CSP_ITERATION_FWD==0)

Examples/test-suite/lua/exception_order_runme.lua

@@ -4,7 +4,9 @@ import("exception_order")	-- import lib into global
 eo=exception_order --alias
 
 -- catching undefined variables
-setmetatable(getfenv(),{__index=function (t,i) error("undefined global variable `"..i.."'",2) end})
+local env = _ENV -- Lua 5.2
+if not env then env = getfenv () end -- Lua 5.1
+setmetatable(env, {__index=function (t,i) error("undefined global variable `"..i.."'",2) end})
 
 a = eo.A()
 

Examples/test-suite/lua/import_nomodule_runme.lua

@@ -2,7 +2,9 @@ require("import")	-- the import fn
 import("import_nomodule")	-- import code
 
 -- catch "undefined" global variables
-setmetatable(getfenv(),{__index=function (t,i) error("undefined global variable `"..i.."'",2) end})
+local env = _ENV -- Lua 5.2
+if not env then env = getfenv () end -- Lua 5.1
+setmetatable(env, {__index=function (t,i) error("undefined global variable `"..i.."'",2) end})
 
 f = import_nomodule.create_Foo()
 import_nomodule.test1(f,42)

Examples/test-suite/lua/li_carrays_runme.lua

@@ -5,7 +5,9 @@ import("li_carrays")	-- import code
 for k,v in pairs(li_carrays) do _G[k]=v end
 
 -- catch "undefined" global variables
-setmetatable(getfenv(),{__index=function (t,i) error("undefined global variable `"..i.."'",2) end})
+local env = _ENV -- Lua 5.2
+if not env then env = getfenv () end -- Lua 5.1
+setmetatable(env, {__index=function (t,i) error("undefined global variable `"..i.."'",2) end})
 
 -- Testing for %array_functions(int,intArray)
 ary = new_intArray(2)

Examples/test-suite/lua/li_std_string_runme.lua

@@ -4,7 +4,9 @@ import("li_std_string")	-- import lib
 for k,v in pairs(li_std_string) do _G[k]=v end -- move to global
 
 -- catch "undefined" global variables
-setmetatable(getfenv(),{__index=function (t,i) error("undefined global variable `"..i.."'",2) end})
+local env = _ENV -- Lua 5.2
+if not env then env = getfenv () end -- Lua 5.1
+setmetatable(env, {__index=function (t,i) error("undefined global variable `"..i.."'",2) end})
 
 -- helper to check type
 function is_std_string(s) 

Examples/test-suite/lua/li_typemaps_runme.lua

@@ -2,7 +2,9 @@ require("import")	-- the import fn
 import("li_typemaps")	-- import code
 
 -- catch "undefined" global variables
-setmetatable(getfenv(),{__index=function (t,i) error("undefined global variable `"..i.."'",2) end})
+local env = _ENV -- Lua 5.2
+if not env then env = getfenv () end -- Lua 5.1
+setmetatable(env, {__index=function (t,i) error("undefined global variable `"..i.."'",2) end})
 
 -- Check double INPUT typemaps
 assert(li_typemaps.in_double(22.22) == 22.22)

Examples/test-suite/lua/operator_overload_runme.lua

@@ -8,7 +8,9 @@ for k,v in pairs(operator_overload) do _G[k]=v end -- move to global
 Op_sanity_check()
 
 -- catching undefined variables
-setmetatable(getfenv(),{__index=function (t,i) error("undefined global variable `"..i.."'",2) end})
+local env = _ENV -- Lua 5.2
+if not env then env = getfenv () end -- Lua 5.1
+setmetatable(env, {__index=function (t,i) error("undefined global variable `"..i.."'",2) end})
 
 -- test routine:
 a=Op()

Lib/lua/luarun.swg

@@ -15,6 +15,24 @@ extern "C" {
 #include <stdlib.h>  /* for malloc */
 #include <assert.h>  /* for a few sanity tests */
 
+/* -----------------------------------------------------------------------------
+ * compatibility defines
+ * ----------------------------------------------------------------------------- */
+
+/* History of Lua C API length functions:  In Lua 5.0 (and before?)
+   there was "lua_strlen".  In Lua 5.1, this was renamed "lua_objlen",
+   but a compatibility define of "lua_strlen" was added.  In Lua 5.2,
+   this function was again renamed, to "lua_rawlen" (to emphasize that
+   it doesn't call the "__len" metamethod), and the compatibility
+   define of lua_strlen was removed.  All SWIG uses have been updated
+   to "lua_rawlen", and we add our own defines of that here for older
+   versions of Lua.  */
+#if !defined(LUA_VERSION_NUM) || LUA_VERSION_NUM < 501
+# define lua_rawlen lua_strlen
+#elif LUA_VERSION_NUM == 501
+# define lua_rawlen lua_objlen
+#endif
+
 /* -----------------------------------------------------------------------------
  * global swig types
  * ----------------------------------------------------------------------------- */

Lib/lua/luaruntime.swg

@@ -30,7 +30,11 @@ SWIGEXPORT int SWIG_init(lua_State* L) /* default Lua action */
 #if (SWIG_LUA_TARGET != SWIG_LUA_FLAVOR_ELUAC) /* valid for both Lua and eLua */
   int i;
   /* start with global table */
+#ifdef LUA_RIDX_GLOBALS
+  lua_rawgeti(L, LUA_REGISTRYINDEX, LUA_RIDX_GLOBALS);
+#else
   lua_pushvalue(L,LUA_GLOBALSINDEX);
+#endif
   /* SWIG's internal initalisation */
   SWIG_InitializeModule((void*)L);
   SWIG_PropagateClientData();

Lib/lua/luatypemaps.swg

@@ -298,7 +298,7 @@ parmeters match which function
 
 // special check for a char (string of length 1)
 %typecheck(SWIG_TYPECHECK_CHAR,fragment="SWIG_lua_isnilstring") char, const char& {
-  $1 = SWIG_lua_isnilstring(L,$input) && (lua_strlen(L,$input)==1);
+  $1 = SWIG_lua_isnilstring(L,$input) && (lua_rawlen(L,$input)==1);
 }
 
 %typecheck(SWIG_TYPECHECK_STRING,fragment="SWIG_lua_isnilstring") char *, char[] {

Lib/lua/std_string.i

@@ -41,18 +41,18 @@ but
 Similarly for getting the string
   $1 = (char*)lua_tostring(L, $input);
 becomes
-  $1.assign(lua_tostring(L,$input),lua_strlen(L,$input));
+  $1.assign(lua_tostring(L,$input),lua_rawlen(L,$input));
   
 Not using: lua_tolstring() as this is only found in Lua 5.1 & not 5.0.2
 */
 
 %typemap(in,checkfn="lua_isstring") std::string
-%{$1.assign(lua_tostring(L,$input),lua_strlen(L,$input));%}
+%{$1.assign(lua_tostring(L,$input),lua_rawlen(L,$input));%}
 %typemap(out) std::string
 %{ lua_pushlstring(L,$1.data(),$1.size()); SWIG_arg++;%}
 
 %typemap(in,checkfn="lua_isstring")	const std::string& (std::string temp)
-%{temp.assign(lua_tostring(L,$input),lua_strlen(L,$input)); $1=&temp;%}
+%{temp.assign(lua_tostring(L,$input),lua_rawlen(L,$input)); $1=&temp;%}
 
 %typemap(out) const std::string&
 %{ lua_pushlstring(L,$1->data(),$1->size()); SWIG_arg++;%}

Lib/lua/wchar.i

@@ -30,7 +30,7 @@ wchar_t* str2wstr(const char *str, int len)
 
 %typemap(in, checkfn="SWIG_lua_isnilstring", fragment="SWIG_lua_isnilstring") wchar_t *
 %{
-$1 = str2wstr(lua_tostring( L, $input ),lua_strlen( L, $input ));
+$1 = str2wstr(lua_tostring( L, $input ),lua_rawlen( L, $input ));
 if ($1==0) {lua_pushfstring(L,"Error in converting to wchar (arg %d)",$input);goto fail;}
 %}
 

Source/Modules/lua.cxx

@@ -331,7 +331,7 @@ public:
         Printf(s_dot_set, "\nconst LUA_REG_TYPE dot_set[] = {\n");
       }
     } else {
-      Printf(s_cmd_tab, "\nstatic const struct luaL_reg swig_commands[] = {\n");
+      Printf(s_cmd_tab, "\nstatic const struct luaL_Reg swig_commands[] = {\n");
       Printf(s_var_tab, "\nstatic swig_lua_var_info swig_variables[] = {\n");
       Printf(s_const_tab, "\nstatic swig_lua_const_info swig_constants[] = {\n");
       Printf(f_wrappers, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n");

configure.in

@@ -1890,7 +1890,12 @@ else
 
 # can we find lua?
 if test "x$LUABIN" = xyes; then
-   AC_PATH_PROG(LUABIN, lua)
+   # We look for a versioned Lua binary first, as there can be
+   # multiple versions of Lua installed on some systems (like Debian).
+   # The search order should match the include-file and library search
+   # orders below (a Lua shared library built for one version may not
+   # work with a Lua binary of a different version).
+   AC_PATH_PROGS(LUABIN, [lua5.2 lua5.1 lua])
 fi
 
 # check version: we need Lua 5.x
@@ -1938,8 +1943,11 @@ else
   # if we didn't get it, going to have to look elsewhere (the hard way)
   if test -z "$LUA_OK"; then
     AC_MSG_CHECKING(for lua.h in other locations)
-    # note: ubuntu seems to like /usr/include/lua5.1/lua.h
-    dirs="/usr/include/lua* /usr/local/include"
+    # note: Debian/Ubuntu seem to like /usr/include/lua5.1/lua.h
+    # The ordering of the include directories to search should match
+    # the ordering of libraries to search in the library test below.
+    inc=/usr/include
+    dirs="$inc/lua5.2 $inc/lua5.1 $inc/lua51 $inc/lua5.0 $inc/lua50 /usr/local/include"
     for i in $dirs; do
       #echo "$i"
       if test -r $i/lua.h; then
@@ -1962,7 +1970,7 @@ lua_save_LIBS=$LIBS # the code seems to disrupt LIBS, so saving
 if test -n "$LUALIB"; then
   AC_CHECK_FILE($LUALIB/liblua.a,[LUALINK="-L$LUALIB -llua"],[LUABIN=])
 else
-  AC_SEARCH_LIBS(lua_close, [lua lua51 lua5.1 lua50 lua5.0], [LUALINK="-l$ac_lib"],[LUABIN=])
+  AC_SEARCH_LIBS(lua_close, [lua lua5.2 lua5.1 lua51 lua5.0 lua50], [LUALINK="-l$ac_lib"],[LUABIN=])
 fi
 
 # adding lualib for lua 5.0