// Copyright 2011 Google Inc.
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//
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#include "c_gate.hpp"
#include "state.ipp"


/// Creates a new gateway to an existing C++ Lua state.
///
/// \param state_ The state to connect to.  This object must remain alive while
///     the newly-constructed state_c_gate is alive.
lutok::state_c_gate::state_c_gate(state& state_) :
    _state(state_)
{
}


/// Destructor.
///
/// Destroying this object has no implications on the life cycle of the Lua
/// state.  Only the corresponding state object controls when the Lua state is
/// closed.
lutok::state_c_gate::~state_c_gate(void)
{
}


/// Creates a C++ state for a C Lua state.
///
/// \warning The created state object does NOT own the C state.  You must take
/// care to properly destroy the input lua_State when you are done with it to
/// not leak resources.
///
/// \param raw_state The raw state to wrap temporarily.
///
/// \return The wrapped state without strong ownership on the input state.
lutok::state
lutok::state_c_gate::connect(lua_State* raw_state)
{
    return state(static_cast< void* >(raw_state));
}


/// Returns the C native Lua state.
///
/// \return A native lua_State object holding the Lua C API state.
lua_State*
lutok::state_c_gate::c_state(void)
{
    return static_cast< lua_State* >(_state.raw_state());
}