EQStream abstraction layer

libs/luabind/src/create_class.cpp

@@ -0,0 +1,139 @@
+// Copyright (c) 2003 Daniel Wallin and Arvid Norberg
+
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the "Software"),
+// to deal in the Software without restriction, including without limitation
+// the rights to use, copy, modify, merge, publish, distribute, sublicense,
+// and/or sell copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following conditions:
+
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+// ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+// SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+// ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
+// OR OTHER DEALINGS IN THE SOFTWARE.
+
+#define LUABIND_BUILDING
+
+#include <luabind/lua_include.hpp>
+
+#include <luabind/luabind.hpp>
+
+namespace luabind { namespace detail
+{
+	namespace
+	{
+		// expects two tables on the lua stack:
+		// 1: destination
+		// 2: source
+		void copy_member_table(lua_State* L)
+		{
+			lua_pushnil(L);
+
+			while (lua_next(L, -2))
+			{
+				lua_pushstring(L, "__init");
+				if (lua_equal(L, -1, -3))
+				{
+					lua_pop(L, 2);
+					continue;
+				}
+				else lua_pop(L, 1); // __init string
+
+				lua_pushstring(L, "__finalize");
+				if (lua_equal(L, -1, -3))
+				{
+					lua_pop(L, 2);
+					continue;
+				}
+				else lua_pop(L, 1); // __finalize string
+
+				lua_pushvalue(L, -2); // copy key
+				lua_insert(L, -2);
+				lua_settable(L, -5);
+			}
+		}
+	}
+
+
+	int create_class::stage2(lua_State* L)
+	{
+		class_rep* crep = static_cast<class_rep*>(lua_touserdata(L, lua_upvalueindex(1)));
+		assert((crep != 0) && "internal error, please report");
+		assert((is_class_rep(L, lua_upvalueindex(1))) && "internal error, please report");
+
+	#ifndef LUABIND_NO_ERROR_CHECKING
+
+		if (!is_class_rep(L, 1))
+		{
+			lua_pushstring(L, "expected class to derive from or a newline");
+			lua_error(L);
+		}
+
+	#endif
+
+		class_rep* base = static_cast<class_rep*>(lua_touserdata(L, 1));
+		class_rep::base_info binfo;
+
+		binfo.pointer_offset = 0;
+		binfo.base = base;
+		crep->add_base_class(binfo);
+
+		// copy base class members
+
+		crep->get_table(L);
+		base->get_table(L);
+		copy_member_table(L);
+
+		crep->get_default_table(L);
+		base->get_default_table(L);
+		copy_member_table(L);
+
+		crep->set_type(base->type());
+
+		return 0;
+	}
+
+	int create_class::stage1(lua_State* L)
+	{
+
+	#ifndef LUABIND_NO_ERROR_CHECKING
+
+		if (lua_gettop(L) != 1 || lua_type(L, 1) != LUA_TSTRING || lua_isnumber(L, 1))
+		{
+			lua_pushstring(L, "invalid construct, expected class name");
+			lua_error(L);
+		}
+
+		if (std::strlen(lua_tostring(L, 1)) != lua_strlen(L, 1))
+		{
+			lua_pushstring(L, "luabind does not support class names with extra nulls");
+			lua_error(L);
+		}
+
+	#endif
+
+		const char* name = lua_tostring(L, 1);
+
+		void* c = lua_newuserdata(L, sizeof(class_rep));
+		new(c) class_rep(L, name);
+
+		// make the class globally available
+		lua_pushvalue(L, -1);
+		lua_setglobal(L, name);
+
+		// also add it to the closure as return value
+		lua_pushcclosure(L, &stage2, 1);
+
+		return 1;
+	}
+
+}}
+