Function setfield

3rd/lua-5.4.3/src/loslib.c:209–216

** About the overflow check: an overflow cannot occur when time ** is represented by a lua_Integer, because either lua_Integer is ** large enough to represent all int fields or it is not large enough ** to represent a time that cause a field to overflow. However, if ** times are represented as doubles and lua_Integer is int, then the ** time 0x1.e1853b0d184f6p+55 would cause an overflow when addi

** to compute the year.
*/
static void setfield (lua_State *L, const char *key, int value, int delta) {
  #if (defined(LUA_NUMTIME) && LUA_MAXINTEGER <= INT_MAX)
    if (l_unlikely(value > LUA_MAXINTEGER - delta))
      luaL_error(L, "field '%s' is out-of-bound", key);
  #endif
  lua_pushinteger(L, (lua_Integer)value + delta);
  lua_setfield(L, -2, key);
}


static void setboolfield (lua_State *L, const char *key, int value) {