1 files changed, 133 insertions, 0 deletions
diff --git a/lib/tolua++/src/lib/tolua_to.c b/lib/tolua++/src/lib/tolua_to.c
new file mode 100644
index 000000000..04132e901
--- /dev/null
+++ b/lib/tolua++/src/lib/tolua_to.c
@@ -0,0 +1,133 @@
+/* tolua: funcitons to convert to C types
+** Support code for Lua bindings.
+** Written by Waldemar Celes
+** TeCGraf/PUC-Rio
+** Apr 2003
+** $Id: $
+*/
+
+/* This code is free software; you can redistribute it and/or modify it.
+** The software provided hereunder is on an "as is" basis, and
+** the author has no obligation to provide maintenance, support, updates,
+** enhancements, or modifications.
+*/
+
+#include "../../include/tolua++.h"
+
+#include <string.h>
+#include <stdlib.h>
+
+TOLUA_API lua_Number tolua_tonumber (lua_State* L, int narg, lua_Number def)
+{
+ return lua_gettop(L)<abs(narg) ? def : lua_tonumber(L,narg);
+}
+
+TOLUA_API const char* tolua_tostring (lua_State* L, int narg, const char* def)
+{
+ return lua_gettop(L)<abs(narg) ? def : lua_tostring(L,narg);
+}
+
+TOLUA_API void* tolua_touserdata (lua_State* L, int narg, void* def)
+{
+	
+	/* return lua_gettop(L)<abs(narg) ? def : lua_touserdata(L,narg); */
+
+	if (lua_gettop(L)<abs(narg)) {
+ 		return def;
+	};
+	 
+	if (lua_islightuserdata(L, narg)) {
+	
+		return lua_touserdata(L,narg);
+	};
+	
+	return tolua_tousertype(L, narg, def);
+}
+
+extern int push_table_instance(lua_State* L, int lo);
+
+TOLUA_API void* tolua_tousertype (lua_State* L, int narg, void* def)
+{
+ if (lua_gettop(L)<abs(narg))
+  return def;
+ else
+ {
+  void* u;
+  if (!lua_isuserdata(L, narg)) {
+	  if (!push_table_instance(L, narg)) return NULL;
+  };
+  u = lua_touserdata(L,narg);
+  return (u==NULL) ? NULL : *((void**)u); /* nil represents NULL */
+ }
+}
+
+TOLUA_API int tolua_tovalue (lua_State* L, int narg, int def)
+{
+ return lua_gettop(L)<abs(narg) ? def : narg;
+}
+
+TOLUA_API int tolua_toboolean (lua_State* L, int narg, int def)
+{
+ return lua_gettop(L)<abs(narg) ?  def : lua_toboolean(L,narg);
+}
+
+TOLUA_API lua_Number tolua_tofieldnumber (lua_State* L, int lo, int index, lua_Number def)
+{
+ double v;
+ lua_pushnumber(L,index);
+ lua_gettable(L,lo);
+ v = lua_isnil(L,-1) ? def : lua_tonumber(L,-1);
+ lua_pop(L,1);
+ return v;
+}
+
+TOLUA_API const char* tolua_tofieldstring
+(lua_State* L, int lo, int index, const char* def)
+{
+ const char* v;
+ lua_pushnumber(L,index);
+ lua_gettable(L,lo);
+ v = lua_isnil(L,-1) ? def : lua_tostring(L,-1);
+ lua_pop(L,1);
+ return v;
+}
+
+TOLUA_API void* tolua_tofielduserdata (lua_State* L, int lo, int index, void* def)
+{
+ void* v;
+ lua_pushnumber(L,index);
+ lua_gettable(L,lo);
+ v = lua_isnil(L,-1) ? def : lua_touserdata(L,-1);
+ lua_pop(L,1);
+ return v;
+}
+
+TOLUA_API void* tolua_tofieldusertype (lua_State* L, int lo, int index, void* def)
+{
+ void* v;
+ lua_pushnumber(L,index);
+ lua_gettable(L,lo);
+ v = lua_isnil(L,-1) ? def : (*(void **)(lua_touserdata(L, -1))); /* lua_unboxpointer(L,-1); */
+ lua_pop(L,1);
+ return v;
+}
+
+TOLUA_API int tolua_tofieldvalue (lua_State* L, int lo, int index, int def)
+{
+ int v;
+ lua_pushnumber(L,index);
+ lua_gettable(L,lo);
+ v = lua_isnil(L,-1) ? def : lo;
+ lua_pop(L,1);
+ return v;
+}
+
+TOLUA_API int tolua_getfieldboolean (lua_State* L, int lo, int index, int def)
+{
+ int v;
+ lua_pushnumber(L,index);
+ lua_gettable(L,lo);
+ v = lua_isnil(L,-1) ? 0 : lua_toboolean(L,-1);
+ lua_pop(L,1);
+ return v;
+}