3 Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published by
7 the Free Software Foundation; either version 2.1 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 #include "cpp_api/s_base.h"
21 #include "cpp_api/s_internal.h"
22 #include "lua_api/l_object.h"
23 #include "serverobject.h"
29 #include "util/string.h"
48 ModNameStorer(lua_State *L_, const std::string &modname):
51 // Store current modname in registry
52 lua_pushstring(L, modname.c_str());
53 lua_setfield(L, LUA_REGISTRYINDEX, "current_modname");
57 // Clear current modname in registry
59 lua_setfield(L, LUA_REGISTRYINDEX, "current_modname");
68 ScriptApiBase::ScriptApiBase()
70 #ifdef SCRIPTAPI_LOCK_DEBUG
74 m_luastack = luaL_newstate();
77 luaL_openlibs(m_luastack);
79 // Add and save an error handler
80 lua_pushcfunction(m_luastack, script_error_handler);
81 m_errorhandler = lua_gettop(m_luastack);
83 // Make the ScriptApiBase* accessible to ModApiBase
84 lua_pushlightuserdata(m_luastack, this);
85 lua_setfield(m_luastack, LUA_REGISTRYINDEX, "scriptapi");
87 // If we are using LuaJIT add a C++ wrapper function to catch
88 // exceptions thrown in Lua -> C++ calls
90 lua_pushlightuserdata(m_luastack, (void*) script_exception_wrapper);
91 luaJIT_setmode(m_luastack, -1, LUAJIT_MODE_WRAPCFUNC | LUAJIT_MODE_ON);
92 lua_pop(m_luastack, 1);
96 lua_newtable(m_luastack);
97 lua_setglobal(m_luastack, "core");
99 lua_pushstring(m_luastack, DIR_DELIM);
100 lua_setglobal(m_luastack, "DIR_DELIM");
102 lua_pushstring(m_luastack, porting::getPlatformName());
103 lua_setglobal(m_luastack, "PLATFORM");
106 m_environment = NULL;
110 ScriptApiBase::~ScriptApiBase()
112 lua_close(m_luastack);
115 bool ScriptApiBase::loadMod(const std::string &scriptpath,
116 const std::string &modname)
118 ModNameStorer modnamestorer(getStack(), modname);
120 if (!string_allowed(modname, MODNAME_ALLOWED_CHARS)) {
121 errorstream<<"Error loading mod \""<<modname
122 <<"\": modname does not follow naming conventions: "
123 <<"Only chararacters [a-z0-9_] are allowed."<<std::endl;
127 return loadScript(scriptpath);
130 bool ScriptApiBase::loadScript(const std::string &scriptpath)
132 verbosestream<<"Loading and running script from "<<scriptpath<<std::endl;
134 lua_State *L = getStack();
136 int ret = luaL_loadfile(L, scriptpath.c_str()) || lua_pcall(L, 0, 0, m_errorhandler);
138 errorstream << "========== ERROR FROM LUA ===========" << std::endl;
139 errorstream << "Failed to load and run script from " << std::endl;
140 errorstream << scriptpath << ":" << std::endl;
141 errorstream << std::endl;
142 errorstream << lua_tostring(L, -1) << std::endl;
143 errorstream << std::endl;
144 errorstream << "======= END OF ERROR FROM LUA ========" << std::endl;
145 lua_pop(L, 1); // Pop error message from stack
151 void ScriptApiBase::realityCheck()
153 int top = lua_gettop(m_luastack);
155 dstream<<"Stack is over 30:"<<std::endl;
157 std::string traceback = script_get_backtrace(m_luastack);
158 throw LuaError("Stack is over 30 (reality check)\n" + traceback);
162 void ScriptApiBase::scriptError()
164 throw LuaError(lua_tostring(m_luastack, -1));
167 void ScriptApiBase::stackDump(std::ostream &o)
170 int top = lua_gettop(m_luastack);
171 for (i = 1; i <= top; i++) { /* repeat for each level */
172 int t = lua_type(m_luastack, i);
175 case LUA_TSTRING: /* strings */
176 o<<"\""<<lua_tostring(m_luastack, i)<<"\"";
179 case LUA_TBOOLEAN: /* booleans */
180 o<<(lua_toboolean(m_luastack, i) ? "true" : "false");
183 case LUA_TNUMBER: /* numbers */ {
185 snprintf(buf, 10, "%g", lua_tonumber(m_luastack, i));
189 default: /* other values */
190 o<<lua_typename(m_luastack, t);
199 void ScriptApiBase::addObjectReference(ServerActiveObject *cobj)
201 SCRIPTAPI_PRECHECKHEADER
202 //infostream<<"scriptapi_add_object_reference: id="<<cobj->getId()<<std::endl;
204 // Create object on stack
205 ObjectRef::create(L, cobj); // Puts ObjectRef (as userdata) on stack
206 int object = lua_gettop(L);
208 // Get core.object_refs table
209 lua_getglobal(L, "core");
210 lua_getfield(L, -1, "object_refs");
211 luaL_checktype(L, -1, LUA_TTABLE);
212 int objectstable = lua_gettop(L);
214 // object_refs[id] = object
215 lua_pushnumber(L, cobj->getId()); // Push id
216 lua_pushvalue(L, object); // Copy object to top of stack
217 lua_settable(L, objectstable);
220 void ScriptApiBase::removeObjectReference(ServerActiveObject *cobj)
222 SCRIPTAPI_PRECHECKHEADER
223 //infostream<<"scriptapi_rm_object_reference: id="<<cobj->getId()<<std::endl;
225 // Get core.object_refs table
226 lua_getglobal(L, "core");
227 lua_getfield(L, -1, "object_refs");
228 luaL_checktype(L, -1, LUA_TTABLE);
229 int objectstable = lua_gettop(L);
231 // Get object_refs[id]
232 lua_pushnumber(L, cobj->getId()); // Push id
233 lua_gettable(L, objectstable);
234 // Set object reference to NULL
235 ObjectRef::set_null(L);
236 lua_pop(L, 1); // pop object
238 // Set object_refs[id] = nil
239 lua_pushnumber(L, cobj->getId()); // Push id
241 lua_settable(L, objectstable);
244 // Creates a new anonymous reference if cobj=NULL or id=0
245 void ScriptApiBase::objectrefGetOrCreate(lua_State *L,
246 ServerActiveObject *cobj)
248 if(cobj == NULL || cobj->getId() == 0){
249 ObjectRef::create(L, cobj);
251 objectrefGet(L, cobj->getId());
255 void ScriptApiBase::objectrefGet(lua_State *L, u16 id)
257 // Get core.object_refs[i]
258 lua_getglobal(L, "core");
259 lua_getfield(L, -1, "object_refs");
260 luaL_checktype(L, -1, LUA_TTABLE);
261 lua_pushnumber(L, id);
263 lua_remove(L, -2); // object_refs
264 lua_remove(L, -2); // core