src/lua/compat.h

   1 /*
   2         libloc - A library to determine the location of someone on the Internet
   3
   4         Copyright (C) 2024 IPFire Development Team <info@ipfire.org>
   5
   6         This library is free software; you can redistribute it and/or
   7         modify it under the terms of the GNU Lesser General Public
   8         License as published by the Free Software Foundation; either
   9         version 2.1 of the License, or (at your option) any later version.
  10
  11         This library is distributed in the hope that it will be useful,
  12         but WITHOUT ANY WARRANTY; without even the implied warranty of
  13         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14         Lesser General Public License for more details.
  15 */
  16
  17 #ifndef LUA_LOCATION_COMPAT_H
  18 #define LUA_LOCATION_COMPAT_H
  19
  20 #include <lua.h>
  21 #include <lauxlib.h>
  22
  23 #if LUA_VERSION_RELEASE_NUM < 502
  24
  25 static inline void luaL_setmetatable(lua_State* L, const char* name) {
  26         luaL_checkstack(L, 1, "not enough stack slots");
  27         luaL_getmetatable(L, name);
  28         lua_setmetatable(L, -2);
  29 }
  30
  31 static inline void luaL_setfuncs(lua_State* L, const luaL_Reg* l, int nup) {
  32         int i;
  33
  34         luaL_checkstack(L, nup+1, "too many upvalues");
  35
  36         for (; l->name != NULL; l++) {
  37                 lua_pushstring(L, l->name);
  38
  39                 for (i = 0; i < nup; i++)
  40                         lua_pushvalue(L, -(nup + 1));
  41
  42                 lua_pushcclosure(L, l->func, nup);
  43                 lua_settable(L, -(nup + 3));
  44   }
  45
  46   lua_pop(L, nup);
  47 }
  48
  49 static inline void luaL_newlib(lua_State* L, const luaL_Reg* l) {
  50   lua_newtable(L);
  51   luaL_setfuncs(L, l, 0);
  52 }
  53
  54 #endif /* Lua < 5.2 */
  55
  56 #endif /* LUA_LOCATION_COMPAT_H */