146 lines
3.5 KiB
C++
146 lines
3.5 KiB
C++
// Copyright (c) 2003 Daniel Wallin and Arvid Norberg
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
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// ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
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// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
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// SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
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// ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
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// OR OTHER DEALINGS IN THE SOFTWARE.
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#define LUABIND_BUILDING
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#include <luabind/lua_include.hpp>
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#include <luabind/luabind.hpp>
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#if LUA_VERSION_NUM < 502
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# define lua_compare(L, index1, index2, fn) fn(L, index1, index2)
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# define LUA_OPEQ lua_equal
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# define lua_rawlen lua_objlen
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#endif
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namespace luabind { namespace detail
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{
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namespace
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{
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// expects two tables on the lua stack:
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// 1: destination
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// 2: source
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void copy_member_table(lua_State* L)
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{
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lua_pushnil(L);
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while (lua_next(L, -2))
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{
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lua_pushstring(L, "__init");
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if (lua_compare(L, -1, -3, LUA_OPEQ))
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{
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lua_pop(L, 2);
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continue;
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}
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else lua_pop(L, 1); // __init string
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lua_pushstring(L, "__finalize");
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if (lua_compare(L, -1, -3, LUA_OPEQ))
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{
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lua_pop(L, 2);
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continue;
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}
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else lua_pop(L, 1); // __finalize string
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lua_pushvalue(L, -2); // copy key
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lua_insert(L, -2);
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lua_settable(L, -5);
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}
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}
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}
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int create_class::stage2(lua_State* L)
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{
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class_rep* crep = static_cast<class_rep*>(lua_touserdata(L, lua_upvalueindex(1)));
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assert((crep != 0) && "internal error, please report");
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assert((is_class_rep(L, lua_upvalueindex(1))) && "internal error, please report");
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#ifndef LUABIND_NO_ERROR_CHECKING
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if (!is_class_rep(L, 1))
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{
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lua_pushstring(L, "expected class to derive from or a newline");
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lua_error(L);
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}
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#endif
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class_rep* base = static_cast<class_rep*>(lua_touserdata(L, 1));
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class_rep::base_info binfo;
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binfo.pointer_offset = 0;
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binfo.base = base;
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crep->add_base_class(binfo);
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// copy base class members
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crep->get_table(L);
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base->get_table(L);
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copy_member_table(L);
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crep->get_default_table(L);
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base->get_default_table(L);
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copy_member_table(L);
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crep->set_type(base->type());
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return 0;
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}
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int create_class::stage1(lua_State* L)
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{
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#ifndef LUABIND_NO_ERROR_CHECKING
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if (lua_gettop(L) != 1 || lua_type(L, 1) != LUA_TSTRING || lua_isnumber(L, 1))
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{
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lua_pushstring(L, "invalid construct, expected class name");
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lua_error(L);
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}
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if (std::strlen(lua_tostring(L, 1)) != lua_rawlen(L, 1))
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{
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lua_pushstring(L, "luabind does not support class names with extra nulls");
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lua_error(L);
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}
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#endif
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const char* name = lua_tostring(L, 1);
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void* c = lua_newuserdata(L, sizeof(class_rep));
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new(c) class_rep(L, name);
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// make the class globally available
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lua_pushvalue(L, -1);
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lua_setglobal(L, name);
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// also add it to the closure as return value
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lua_pushcclosure(L, &stage2, 1);
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return 1;
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}
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}}
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