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/*
* Copyright (c) 2013-2016 Isode Limited.
* All rights reserved.
* See the COPYING file for more information.
*/
#include <Sluift/Lua/Check.h>
#include <sstream>
#include <boost/numeric/conversion/cast.hpp>
#include <lua.hpp>
#include <Swiften/Base/ByteArray.h>
#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, nullptr);
if (!s) {
throw Lua::Exception(getArgTypeError(L, arg, LUA_TSTRING));
}
return std::string(s);
}
ByteArray Lua::checkByteArray(lua_State* L, int arg) {
size_t len;
const char *s = lua_tolstring(L, arg, &len);
if (!s) {
throw Lua::Exception(getArgTypeError(L, arg, LUA_TSTRING));
}
return createByteArray(s, len);
}
void* Lua::checkUserDataRaw(lua_State* L, int arg) {
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_pop(L, 1);
return userData;
}
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Swift