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 /******************************************************************************/
21 /******************************************************************************/
22 /* WARNING!!!! do NOT add this header in any include file or any code file */
23 /* not being a modapi file!!!!!!!! */
24 /******************************************************************************/
25 /******************************************************************************/
35 #include "common/c_types.h"
39 Define our custom indices into the Lua registry table.
41 Lua 5.2 and above define the LUA_RIDX_LAST macro. Only numbers above that
42 may be used for custom indices, anything else is reserved.
44 Lua 5.1 / LuaJIT do not use any numeric indices (only string indices),
45 so we can use numeric indices freely.
49 CUSTOM_RIDX_BEFORE_ = LUA_RIDX_LAST,
51 CUSTOM_RIDX_BEFORE_ = 0,
54 CUSTOM_RIDX_SCRIPTAPI,
55 CUSTOM_RIDX_GLOBALS_BACKUP,
56 CUSTOM_RIDX_CURRENT_MOD_NAME,
57 CUSTOM_RIDX_ERROR_HANDLER,
58 CUSTOM_RIDX_HTTP_API_LUA,
59 CUSTOM_RIDX_METATABLE_MAP,
61 // The following four functions are implemented in Lua because LuaJIT can
62 // trace them and optimize tables/string better than from the C API.
63 CUSTOM_RIDX_READ_VECTOR,
64 CUSTOM_RIDX_PUSH_VECTOR,
65 CUSTOM_RIDX_READ_NODE,
66 CUSTOM_RIDX_PUSH_NODE,
70 // Determine if CUSTOM_RIDX_SCRIPTAPI will hold a light or full userdata
71 #if defined(__aarch64__) && USE_LUAJIT
72 /* LuaJIT has a 47-bit limit for lightuserdata on this platform and we cannot
73 * assume that the ScriptApi class was allocated at a fitting address. */
74 #define INDIRECT_SCRIPTAPI_RIDX 1
76 #define INDIRECT_SCRIPTAPI_RIDX 0
79 // Pushes the error handler onto the stack and returns its index
80 #define PUSH_ERROR_HANDLER(L) \
81 (lua_rawgeti((L), LUA_REGISTRYINDEX, CUSTOM_RIDX_ERROR_HANDLER), lua_gettop((L)))
83 #define PCALL_RESL(L, RES) { \
84 int result_ = (RES); \
86 script_error((L), result_, NULL, __FUNCTION__); \
90 // What script_run_callbacks does with the return values of callbacks.
91 // Regardless of the mode, if only one callback is defined,
92 // its return value is the total return value.
93 // Modes only affect the case where 0 or >= 2 callbacks are defined.
96 // Returns the return value of the first callback
97 // Returns nil if list of callbacks is empty
98 RUN_CALLBACKS_MODE_FIRST,
99 // Returns the return value of the last callback
100 // Returns nil if list of callbacks is empty
101 RUN_CALLBACKS_MODE_LAST,
102 // If any callback returns a false value, the first such is returned
103 // Otherwise, the first callback's return value (trueish) is returned
104 // Returns true if list of callbacks is empty
105 RUN_CALLBACKS_MODE_AND,
106 // Like above, but stops calling callbacks (short circuit)
107 // after seeing the first false value
108 RUN_CALLBACKS_MODE_AND_SC,
109 // If any callback returns a true value, the first such is returned
110 // Otherwise, the first callback's return value (falseish) is returned
111 // Returns false if list of callbacks is empty
112 RUN_CALLBACKS_MODE_OR,
113 // Like above, but stops calling callbacks (short circuit)
114 // after seeing the first true value
115 RUN_CALLBACKS_MODE_OR_SC,
116 // Note: "a true value" and "a false value" refer to values that
117 // are converted by readParam<bool> to true or false, respectively.
120 // Gets a backtrace of the current execution point
121 std::string script_get_backtrace(lua_State *L);
122 // Wrapper for CFunction calls that converts C++ exceptions to Lua errors
123 int script_exception_wrapper(lua_State *L, lua_CFunction f);
124 // Acts as the error handler for lua_pcall
125 int script_error_handler(lua_State *L);
126 // Takes an error from lua_pcall and throws it as a LuaError
127 void script_error(lua_State *L, int pcall_result, const char *mod, const char *fxn);
129 bool script_log_unique(lua_State *L, std::string message, std::ostream &log_to,
130 int stack_depth = 1);
132 enum DeprecatedHandlingMode {
139 * Reads `deprecated_lua_api_handling` in settings, returns cached value.
141 * @return DeprecatedHandlingMode
143 DeprecatedHandlingMode get_deprecated_handling_mode();
146 * Handles a deprecation warning based on user settings
149 * @param message The deprecation method
150 * @param stack_depth How far on the stack to the first user function (ie: not builtin or core)
152 void log_deprecated(lua_State *L, std::string message, int stack_depth = 1);
154 // Safely call string.dump on a function value
155 // (does not pop, leaves one value on stack)
156 void call_string_dump(lua_State *L, int idx);