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| 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/Check.cpp | |
| parent | c4431ee90f3f1daac0a12b35bfa3378d5c570eaa (diff) | |
| download | swift-1bb607f96e79845ce30dd5590b0d53cc394ac150.zip swift-1bb607f96e79845ce30dd5590b0d53cc394ac150.tar.bz2 | |
PubSub implementation & Sluift refactoring.
Change-Id: I04ff7111b73565c00bff6db183451774a633344f
Diffstat (limited to 'Sluift/Lua/Check.cpp')
| -rw-r--r-- | Sluift/Lua/Check.cpp | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/Sluift/Lua/Check.cpp b/Sluift/Lua/Check.cpp new file mode 100644 index 0000000..cfb726a --- /dev/null +++ b/Sluift/Lua/Check.cpp @@ -0,0 +1,60 @@ +/* + * Copyright (c) 2013 Remko Tronçon + * Licensed under the GNU General Public License. + * See the COPYING file for more information. + */ + +#include <Sluift/Lua/Check.h> + +#include <boost/numeric/conversion/cast.hpp> +#include <iostream> +#include <sstream> +#include <lua.hpp> + +#include <Sluift/Lua/Exception.h> + +using namespace Swift; + + +static std::string getArgTypeError(lua_State* L, int arg, int tag) { + std::ostringstream s; + s << "Arg " << arg << ": expected " << lua_typename(L, tag) << ", got " << luaL_typename(L, arg); + return s.str(); +} + +void Lua::checkType(lua_State* L, int arg, int type) { + if (lua_type(L, arg) != type) { + throw Lua::Exception(getArgTypeError(L, arg, type)); + } +} + +int Lua::checkIntNumber(lua_State* L, int arg) { + if (!lua_isnumber(L, arg)) { + throw Lua::Exception(getArgTypeError(L, arg, LUA_TNUMBER)); + } + return boost::numeric_cast<int>(lua_tonumber(L, arg)); +} + +std::string Lua::checkString(lua_State* L, int arg) { + const char *s = lua_tolstring(L, arg, NULL); + if (!s) { + throw Lua::Exception(getArgTypeError(L, arg, LUA_TSTRING)); + } + return std::string(s); +} + +void* Lua::checkUserDataRaw(lua_State* L, int arg, const char* tableName) { + void* userData = lua_touserdata(L, arg); + if (!userData) { + throw Lua::Exception(getArgTypeError(L, arg, LUA_TUSERDATA)); + } + if (!lua_getmetatable(L, arg)) { + throw Lua::Exception(getArgTypeError(L, arg, LUA_TUSERDATA)); + } + lua_getfield(L, LUA_REGISTRYINDEX, tableName); + if (!lua_rawequal(L, -1, -2)) { + throw Lua::Exception(getArgTypeError(L, arg, LUA_TUSERDATA)); + } + lua_pop(L, 2); + return userData; +} |