46 lines
1.4 KiB
C++
46 lines
1.4 KiB
C++
#ifndef LUA_UTIL_HPP
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#define LUA_UTIL_HPP
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extern "C" {
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#include <lua.h>
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#include <lauxlib.h>
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#include <lualib.h>
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}
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#include <boost/filesystem/convenience.hpp>
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#include <luabind/luabind.hpp>
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#include <iostream>
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#include <string>
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namespace osrm
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{
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namespace util
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{
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template <typename T> void LUA_print(T output) { std::cout << "[LUA] " << output << std::endl; }
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// Check if the lua function <name> is defined
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inline bool lua_function_exists(lua_State *lua_state, const char *name)
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{
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luabind::object globals_table = luabind::globals(lua_state);
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luabind::object lua_function = globals_table[name];
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return lua_function && (luabind::type(lua_function) == LUA_TFUNCTION);
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}
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// Add the folder contain the script to the lua load path, so script can easily require() other lua
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// scripts inside that folder, or subfolders.
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// See http://lua-users.org/wiki/PackagePath for details on the package.path syntax.
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inline void luaAddScriptFolderToLoadPath(lua_State *lua_state, const char *file_name)
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{
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boost::filesystem::path profile_path = boost::filesystem::canonical(file_name);
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std::string folder = profile_path.parent_path().string();
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// TODO: This code is most probably not Windows safe since it uses UNIX'ish path delimiters
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const std::string lua_code = "package.path = \"" + folder + "/?.lua;\" .. package.path";
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luaL_dostring(lua_state, lua_code.c_str());
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}
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}
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}
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#endif // LUA_UTIL_HPP
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