Swiftdiff options
| author | Remko Tronçon <git@el-tramo.be> | 2013-08-25 16:39:06 (GMT) |
|---|---|---|
| committer | Remko Tronçon <git@el-tramo.be> | 2013-08-27 19:47:48 (GMT) |
| commit | 1bb607f96e79845ce30dd5590b0d53cc394ac150 (patch) | |
| tree | 6156622ddd1b3238aec73536e0dc25b632965a71 /Sluift/Lua/LuaUtils.cpp | |
| parent | c4431ee90f3f1daac0a12b35bfa3378d5c570eaa (diff) | |
| download | swift-1bb607f96e79845ce30dd5590b0d53cc394ac150.zip swift-1bb607f96e79845ce30dd5590b0d53cc394ac150.tar.bz2 | |
PubSub implementation & Sluift refactoring.
Change-Id: I04ff7111b73565c00bff6db183451774a633344f
Diffstat (limited to 'Sluift/Lua/LuaUtils.cpp')
| -rw-r--r-- | Sluift/Lua/LuaUtils.cpp | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/Sluift/Lua/LuaUtils.cpp b/Sluift/Lua/LuaUtils.cpp new file mode 100644 index 0000000..7052abe --- /dev/null +++ b/Sluift/Lua/LuaUtils.cpp @@ -0,0 +1,79 @@ +/* + * Copyright (c) 2013 Remko Tronçon + * Licensed under the GNU General Public License. + * See the COPYING file for more information. + */ + +#include <Sluift/Lua/LuaUtils.h> + +#include <lua.hpp> + +#include <boost/scope_exit.hpp> +#include <Sluift/Lua/Exception.h> +#include <iostream> +#include <cassert> +#include <sstream> +#include <boost/numeric/conversion/cast.hpp> +#include <Sluift/globals.h> + +using namespace Swift::Lua; + +static const std::string INDENT = " "; + +void Swift::Lua::registerTableToString(lua_State* L, int index) { + index = Lua::absoluteOffset(L, index); + lua_rawgeti(L, LUA_REGISTRYINDEX, Sluift::globals.bootIndex); + lua_getfield(L, -1, "register_table_tostring"); + lua_pushvalue(L, index); + if (lua_pcall(L, 1, 0, 0) != 0) { + throw Lua::Exception(lua_tostring(L, -1)); + } + lua_pop(L, 1); +} + +void Swift::Lua::registerGetByTypeIndex(lua_State* L, int index) { + index = Lua::absoluteOffset(L, index); + lua_rawgeti(L, LUA_REGISTRYINDEX, Sluift::globals.bootIndex); + lua_getfield(L, -1, "register_get_by_type_index"); + lua_pushvalue(L, index); + if (lua_pcall(L, 1, 0, 0) != 0) { + throw Lua::Exception(lua_tostring(L, -1)); + } + lua_pop(L, 1); +} + +boost::optional<std::string> Swift::Lua::getStringField(lua_State* L, int index, const std::string& field) { + lua_getfield(L, index, field.c_str()); + // Seems to generate warnings with some versions of CLang that i can't turn off. + // Leaving the more elegant code here, hoping we can re-enable it later (newer boost? c++11?). + // The same applies to the other get*Field functions. + //BOOST_SCOPE_EXIT(&L) { lua_pop(L,1); } BOOST_SCOPE_EXIT_END + //return lua_isstring(L, -1) ? std::string(lua_tostring(L, -1)) : boost::optional<std::string>(); + + boost::optional<std::string> result; + if (lua_isstring(L, -1)) { + result = std::string(lua_tostring(L, -1)); + } + lua_pop(L, 1); + return result; +} + +boost::optional<bool> Swift::Lua::getBooleanField(lua_State* L, int index, const std::string& field) { + lua_getfield(L, index, field.c_str()); + boost::optional<bool> result; + if (lua_isboolean(L, -1)) { + result = lua_toboolean(L, -1); + } + lua_pop(L, 1); + return result; +} + +boost::optional<int> Swift::Lua::getIntField(lua_State* L, int index, const std::string& field) { + lua_getfield(L, index, field.c_str()); + boost::optional<int> result; + if (lua_isnumber(L, -1)) { + result = boost::numeric_cast<int>(lua_tonumber(L, -1)); + } + lua_pop(L, 1); + return result; +} |