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 "common/c_internal.h"
23 std::string script_get_backtrace(lua_State *L)
26 lua_getglobal(L, "debug");
27 if(lua_istable(L, -1)){
28 lua_getfield(L, -1, "traceback");
29 if(lua_isfunction(L, -1)) {
31 if(lua_isstring(L, -1)){
32 s = lua_tostring(L, -1);
41 int script_error_handler(lua_State *L) {
42 lua_getglobal(L, "debug");
43 if (!lua_istable(L, -1)) {
47 lua_getfield(L, -1, "traceback");
48 if (!lua_isfunction(L, -1)) {
53 lua_pushinteger(L, 2);
58 int script_exception_wrapper(lua_State *L, lua_CFunction f)
61 return f(L); // Call wrapped function and return result.
62 } catch (const char *s) { // Catch and convert exceptions.
64 } catch (LuaError& e) {
65 lua_pushstring(L, e.what());
67 return lua_error(L); // Rethrow as a Lua error.
70 void script_error(lua_State *L)
72 const char *s = lua_tostring(L, -1);
73 std::string str(s ? s : "");
77 // Push the list of callbacks (a lua table).
78 // Then push nargs arguments.
79 // Then call this function, which
80 // - runs the callbacks
81 // - replaces the table and arguments with the return value,
82 // computed depending on mode
83 void script_run_callbacks(lua_State *L, int nargs, RunCallbacksMode mode)
85 assert(lua_gettop(L) >= nargs + 1);
87 // Insert error handler
88 lua_pushcfunction(L, script_error_handler);
89 int errorhandler = lua_gettop(L) - nargs - 1;
90 lua_insert(L, errorhandler);
92 // Insert minetest.run_callbacks between error handler and table
93 lua_getglobal(L, "minetest");
94 lua_getfield(L, -1, "run_callbacks");
96 lua_insert(L, errorhandler + 1);
98 // Insert mode after table
99 lua_pushnumber(L, (int) mode);
100 lua_insert(L, errorhandler + 3);
102 // Stack now looks like this:
103 // ... <error handler> <run_callbacks> <table> <mode> <arg#1> <arg#2> ... <arg#n>
105 if (lua_pcall(L, nargs + 2, 1, errorhandler)) {
109 lua_remove(L, -2); // Remove error handler