src/settings.cpp

   1 /* $Id$ */
   2
   3 /*
   4  * This file is part of OpenTTD.
   5  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
   6  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
   7  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
   8  */
   9
  10 /**
  11  * @file settings.cpp
  12  * All actions handling saving and loading of the settings/configuration goes on in this file.
  13  * The file consists of three parts:
  14  * <ol>
  15  * <li>Parsing the configuration file (openttd.cfg). This is achieved with the ini_ functions which
  16  *     handle various types, such as normal 'key = value' pairs, lists and value combinations of
  17  *     lists, strings, integers, 'bit'-masks and element selections.
  18  * <li>Handle reading and writing to the setting-structures from inside the game either from
  19  *     the console for example or through the gui with CMD_ functions.
  20  * <li>Handle saving/loading of the PATS chunk inside the savegame.
  21  * </ol>
  22  * @see SettingDesc
  23  * @see SaveLoad
  24  */
  25
  26 #include "stdafx.h"
  27 #include "currency.h"
  28 #include "screenshot.h"
  29 #include "network/network.h"
  30 #include "network/network_func.h"
  31 #include "settings_internal.h"
  32 #include "command_func.h"
  33 #include "console_func.h"
  34 #include "pathfinder/yapf/yapf.h"
  35 #include "genworld.h"
  36 #include "train.h"
  37 #include "news_func.h"
  38 #include "window_func.h"
  39 #include "sound_func.h"
  40 #include "company_func.h"
  41 #include "rev.h"
  42 #ifdef WITH_FREETYPE
  43 #include "fontcache.h"
  44 #endif
  45 #include "textbuf_gui.h"
  46 #include "rail_gui.h"
  47 #include "elrail_func.h"
  48 #include "error.h"
  49 #include "town.h"
  50 #include "video/video_driver.hpp"
  51 #include "sound/sound_driver.hpp"
  52 #include "music/music_driver.hpp"
  53 #include "blitter/factory.hpp"
  54 #include "base_media_base.h"
  55 #include "gamelog.h"
  56 #include "settings_func.h"
  57 #include "ini_type.h"
  58 #include "ai/ai_config.hpp"
  59 #include "ai/ai.hpp"
  60 #include "game/game_config.hpp"
  61 #include "game/game.hpp"
  62 #include "ship.h"
  63 #include "smallmap_gui.h"
  64 #include "roadveh.h"
  65 #include "fios.h"
  66 #include "strings_func.h"
  67
  68 #include "map/ground.h"
  69 #include "station_base.h"
  70 #include "station_func.h"
  71
  72 #include "table/strings.h"
  73 #include "table/settings.h"
  74
  75 ClientSettings _settings_client;
  76 GameSettings _settings_game;     ///< Game settings of a running game or the scenario editor.
  77 GameSettings _settings_newgame;  ///< Game settings for new games (updated from the intro screen).
  78 VehicleDefaultSettings _old_vds; ///< Used for loading default vehicles settings from old savegames
  79 char *_config_file; ///< Configuration file of OpenTTD
  80
  81 typedef std::list<ErrorMessageData> ErrorList;
  82 static ErrorList _settings_error_list; ///< Errors while loading minimal settings.
  83
  84
  85 typedef void SettingDescProc(IniFile *ini, const SettingDesc *desc, const char *grpname, void *object);
  86 typedef void SettingDescProcList(IniFile *ini, const char *grpname, StringList *list);
  87
  88 static bool IsSignedVarMemType(VarType vt);
  89
  90 /**
  91  * Groups in openttd.cfg that are actually lists.
  92  */
  93 static const char * const _list_group_names[] = {
  94         "bans",
  95         "newgrf",
  96         "servers",
  97         "server_bind_addresses",
  98         NULL
  99 };
 100
 101 /**
 102  * Find the index value of a ONEofMANY type in a string separated by |
 103  * @param many full domain of values the ONEofMANY setting can have
 104  * @param one the current value of the setting for which a value needs found
 105  * @param onelen force calculation of the *one parameter
 106  * @return the integer index of the full-list, or -1 if not found
 107  */
 108 static size_t LookupOneOfMany(const char *many, const char *one, size_t onelen = 0)
 109 {
 110         const char *s;
 111         size_t idx;
 112
 113         if (onelen == 0) onelen = strlen(one);
 114
 115         /* check if it's an integer */
 116         if (*one >= '0' && *one <= '9') return strtoul(one, NULL, 0);
 117
 118         idx = 0;
 119         for (;;) {
 120                 /* find end of item */
 121                 s = many;
 122                 while (*s != '|' && *s != 0) s++;
 123                 if ((size_t)(s - many) == onelen && !memcmp(one, many, onelen)) return idx;
 124                 if (*s == 0) return (size_t)-1;
 125                 many = s + 1;
 126                 idx++;
 127         }
 128 }
 129
 130 /**
 131  * Find the set-integer value MANYofMANY type in a string
 132  * @param many full domain of values the MANYofMANY setting can have
 133  * @param str the current string value of the setting, each individual
 134  * of separated by a whitespace,tab or | character
 135  * @return the 'fully' set integer, or -1 if a set is not found
 136  */
 137 static size_t LookupManyOfMany(const char *many, const char *str)
 138 {
 139         const char *s;
 140         size_t r;
 141         size_t res = 0;
 142
 143         for (;;) {
 144                 /* skip "whitespace" */
 145                 while (*str == ' ' || *str == '\t' || *str == '|') str++;
 146                 if (*str == 0) break;
 147
 148                 s = str;
 149                 while (*s != 0 && *s != ' ' && *s != '\t' && *s != '|') s++;
 150
 151                 r = LookupOneOfMany(many, str, s - str);
 152                 if (r == (size_t)-1) return r;
 153
 154                 SetBit(res, (uint8)r); // value found, set it
 155                 if (*s == 0) break;
 156                 str = s + 1;
 157         }
 158         return res;
 159 }
 160
 161 /**
 162  * Parse an integerlist string and set each found value
 163  * @param p the string to be parsed. Each element in the list is separated by a
 164  * comma or a space character
 165  * @param items pointer to the integerlist-array that will be filled with values
 166  * @param maxitems the maximum number of elements the integerlist-array has
 167  * @return returns the number of items found, or -1 on an error
 168  */
 169 static int ParseIntList(const char *p, int *items, int maxitems)
 170 {
 171         int n = 0; // number of items read so far
 172         bool comma = false; // do we accept comma?
 173
 174         while (*p != '\0') {
 175                 switch (*p) {
 176                         case ',':
 177                                 /* Do not accept multiple commas between numbers */
 178                                 if (!comma) return -1;
 179                                 comma = false;
 180                                 /* FALL THROUGH */
 181                         case ' ':
 182                                 p++;
 183                                 break;
 184
 185                         default: {
 186                                 if (n == maxitems) return -1; // we don't accept that many numbers
 187                                 char *end;
 188                                 long v = strtol(p, &end, 0);
 189                                 if (p == end) return -1; // invalid character (not a number)
 190                                 if (sizeof(int) < sizeof(long)) v = ClampToI32(v);
 191                                 items[n++] = v;
 192                                 p = end; // first non-number
 193                                 comma = true; // we accept comma now
 194                                 break;
 195                         }
 196                 }
 197         }
 198
 199         /* If we have read comma but no number after it, fail.
 200          * We have read comma when (n != 0) and comma is not allowed */
 201         if (n != 0 && !comma) return -1;
 202
 203         return n;
 204 }
 205
 206 /**
 207  * Load parsed string-values into an integer-array (intlist)
 208  * @param str the string that contains the values (and will be parsed)
 209  * @param array pointer to the integer-arrays that will be filled
 210  * @param nelems the number of elements the array holds. Maximum is 64 elements
 211  * @param type the type of elements the array holds (eg INT8, UINT16, etc.)
 212  * @return return true on success and false on error
 213  */
 214 static bool LoadIntList(const char *str, void *array, int nelems, VarType type)
 215 {
 216         int items[64];
 217         int i, nitems;
 218
 219         if (str == NULL) {
 220                 memset(items, 0, sizeof(items));
 221                 nitems = nelems;
 222         } else {
 223                 nitems = ParseIntList(str, items, lengthof(items));
 224                 if (nitems != nelems) return false;
 225         }
 226
 227         switch (type) {
 228                 case SLE_VAR_BL:
 229                 case SLE_VAR_I8:
 230                 case SLE_VAR_U8:
 231                         for (i = 0; i != nitems; i++) ((byte*)array)[i] = items[i];
 232                         break;
 233
 234                 case SLE_VAR_I16:
 235                 case SLE_VAR_U16:
 236                         for (i = 0; i != nitems; i++) ((uint16*)array)[i] = items[i];
 237                         break;
 238
 239                 case SLE_VAR_I32:
 240                 case SLE_VAR_U32:
 241                         for (i = 0; i != nitems; i++) ((uint32*)array)[i] = items[i];
 242                         break;
 243
 244                 default: NOT_REACHED();
 245         }
 246
 247         return true;
 248 }
 249
 250 /**
 251  * Convert an integer-array (intlist) to a string representation. Each value
 252  * is separated by a comma or a space character
 253  * @param buf output buffer where the string-representation will be stored
 254  * @param last last item to write to in the output buffer
 255  * @param array pointer to the integer-arrays that is read from
 256  * @param nelems the number of elements the array holds.
 257  * @param type the type of elements the array holds (eg INT8, UINT16, etc.)
 258  */
 259 static void MakeIntList(char *buf, const char *last, const void *array, int nelems, VarType type)
 260 {
 261         int i, v = 0;
 262         const byte *p = (const byte *)array;
 263
 264         for (i = 0; i != nelems; i++) {
 265                 switch (type) {
 266                         case SLE_VAR_BL:
 267                         case SLE_VAR_I8:  v = *(const   int8 *)p; p += 1; break;
 268                         case SLE_VAR_U8:  v = *(const  uint8 *)p; p += 1; break;
 269                         case SLE_VAR_I16: v = *(const  int16 *)p; p += 2; break;
 270                         case SLE_VAR_U16: v = *(const uint16 *)p; p += 2; break;
 271                         case SLE_VAR_I32: v = *(const  int32 *)p; p += 4; break;
 272                         case SLE_VAR_U32: v = *(const uint32 *)p; p += 4; break;
 273                         default: NOT_REACHED();
 274                 }
 275                 buf += seprintf(buf, last, (i == 0) ? "%d" : ",%d", v);
 276         }
 277 }
 278
 279 /**
 280  * Convert a ONEofMANY structure to a string representation.
 281  * @param buf output buffer where the string-representation will be stored
 282  * @param last last item to write to in the output buffer
 283  * @param many the full-domain string of possible values
 284  * @param id the value of the variable and whose string-representation must be found
 285  */
 286 static void MakeOneOfMany(char *buf, const char *last, const char *many, int id)
 287 {
 288         int orig_id = id;
 289
 290         /* Look for the id'th element */
 291         while (--id >= 0) {
 292                 for (; *many != '|'; many++) {
 293                         if (*many == '\0') { // not found
 294                                 seprintf(buf, last, "%d", orig_id);
 295                                 return;
 296                         }
 297                 }
 298                 many++; // pass the |-character
 299         }
 300
 301         /* copy string until next item (|) or the end of the list if this is the last one */
 302         while (*many != '\0' && *many != '|' && buf < last) *buf++ = *many++;
 303         *buf = '\0';
 304 }
 305
 306 /**
 307  * Convert a MANYofMANY structure to a string representation.
 308  * @param buf output buffer where the string-representation will be stored
 309  * @param last last item to write to in the output buffer
 310  * @param many the full-domain string of possible values
 311  * @param x the value of the variable and whose string-representation must
 312  *        be found in the bitmasked many string
 313  */
 314 static void MakeManyOfMany(char *buf, const char *last, const char *many, uint32 x)
 315 {
 316         const char *start;
 317         int i = 0;
 318         bool init = true;
 319
 320         for (; x != 0; x >>= 1, i++) {
 321                 start = many;
 322                 while (*many != 0 && *many != '|') many++; // advance to the next element
 323
 324                 if (HasBit(x, 0)) { // item found, copy it
 325                         if (!init) buf += seprintf(buf, last, "|");
 326                         init = false;
 327                         if (start == many) {
 328                                 buf += seprintf(buf, last, "%d", i);
 329                         } else {
 330                                 memcpy(buf, start, many - start);
 331                                 buf += many - start;
 332                         }
 333                 }
 334
 335                 if (*many == '|') many++;
 336         }
 337
 338         *buf = '\0';
 339 }
 340
 341 /**
 342  * Convert a string representation (external) of a setting to the internal rep.
 343  * @param desc SettingDesc struct that holds all information about the variable
 344  * @param orig_str input string that will be parsed based on the type of desc
 345  * @return return the parsed value of the setting
 346  */
 347 static const void *StringToVal(const SettingDescBase *desc, const char *orig_str)
 348 {
 349         const char *str = orig_str == NULL ? "" : orig_str;
 350
 351         switch (desc->cmd) {
 352                 case SDT_NUMX: {
 353                         char *end;
 354                         size_t val = strtoul(str, &end, 0);
 355                         if (end == str) {
 356                                 ErrorMessageData msg(STR_CONFIG_ERROR, STR_CONFIG_ERROR_INVALID_VALUE);
 357                                 msg.SetDParamStr(0, str);
 358                                 msg.SetDParamStr(1, desc->name);
 359                                 _settings_error_list.push_back(msg);
 360                                 return desc->def;
 361                         }
 362                         if (*end != '\0') {
 363                                 ErrorMessageData msg(STR_CONFIG_ERROR, STR_CONFIG_ERROR_TRAILING_CHARACTERS);
 364                                 msg.SetDParamStr(0, desc->name);
 365                                 _settings_error_list.push_back(msg);
 366                         }
 367                         return (void*)val;
 368                 }
 369
 370                 case SDT_ONEOFMANY: {
 371                         size_t r = LookupOneOfMany(desc->many, str);
 372                         /* if the first attempt of conversion from string to the appropriate value fails,
 373                          * look if we have defined a converter from old value to new value. */
 374                         if (r == (size_t)-1 && desc->proc_cnvt != NULL) r = desc->proc_cnvt(str);
 375                         if (r != (size_t)-1) return (void*)r; // and here goes converted value
 376
 377                         ErrorMessageData msg(STR_CONFIG_ERROR, STR_CONFIG_ERROR_INVALID_VALUE);
 378                         msg.SetDParamStr(0, str);
 379                         msg.SetDParamStr(1, desc->name);
 380                         _settings_error_list.push_back(msg);
 381                         return desc->def;
 382                 }
 383
 384                 case SDT_MANYOFMANY: {
 385                         size_t r = LookupManyOfMany(desc->many, str);
 386                         if (r != (size_t)-1) return (void*)r;
 387                         ErrorMessageData msg(STR_CONFIG_ERROR, STR_CONFIG_ERROR_INVALID_VALUE);
 388                         msg.SetDParamStr(0, str);
 389                         msg.SetDParamStr(1, desc->name);
 390                         _settings_error_list.push_back(msg);
 391                         return desc->def;
 392                 }
 393
 394                 case SDT_BOOLX: {
 395                         if (strcmp(str, "true")  == 0 || strcmp(str, "on")  == 0 || strcmp(str, "1") == 0) return (void*)true;
 396                         if (strcmp(str, "false") == 0 || strcmp(str, "off") == 0 || strcmp(str, "0") == 0) return (void*)false;
 397
 398                         ErrorMessageData msg(STR_CONFIG_ERROR, STR_CONFIG_ERROR_INVALID_VALUE);
 399                         msg.SetDParamStr(0, str);
 400                         msg.SetDParamStr(1, desc->name);
 401                         _settings_error_list.push_back(msg);
 402                         return desc->def;
 403                 }
 404
 405                 case SDT_STRING: return orig_str;
 406                 case SDT_INTLIST: return str;
 407                 default: break;
 408         }
 409
 410         return NULL;
 411 }
 412
 413 /**
 414  * Set the value of a setting and if needed clamp the value to
 415  * the preset minimum and maximum.
 416  * @param ptr the variable itself
 417  * @param sd pointer to the 'information'-database of the variable
 418  * @param val signed long version of the new value
 419  * @pre SettingDesc is of type SDT_BOOLX, SDT_NUMX,
 420  * SDT_ONEOFMANY or SDT_MANYOFMANY. Other types are not supported as of now
 421  */
 422 static void Write_ValidateSetting(void *ptr, const SettingDesc *sd, int32 val)
 423 {
 424         const SettingDescBase *sdb = &sd->desc;
 425
 426         if (sdb->cmd != SDT_BOOLX &&
 427                         sdb->cmd != SDT_NUMX &&
 428                         sdb->cmd != SDT_ONEOFMANY &&
 429                         sdb->cmd != SDT_MANYOFMANY) {
 430                 return;
 431         }
 432
 433         /* We cannot know the maximum value of a bitset variable, so just have faith */
 434         if (sdb->cmd != SDT_MANYOFMANY) {
 435                 assert(sd->save.type == SL_VAR);
 436
 437                 /* We need to take special care of the uint32 type as we receive from the function
 438                  * a signed integer. While here also bail out on 64-bit settings as those are not
 439                  * supported. Unsigned 8 and 16-bit variables are safe since they fit into a signed
 440                  * 32-bit variable
 441                  * TODO: Support 64-bit settings/variables */
 442                 switch (GetVarMemType(sd->save.conv)) {
 443                         case SLE_VAR_NULL: return;
 444                         case SLE_VAR_BL:
 445                         case SLE_VAR_I8:
 446                         case SLE_VAR_U8:
 447                         case SLE_VAR_I16:
 448                         case SLE_VAR_U16:
 449                         case SLE_VAR_I32: {
 450                                 /* Override the minimum value. No value below sdb->min, except special value 0 */
 451                                 if (!(sdb->flags & SGF_0ISDISABLED) || val != 0) val = Clamp(val, sdb->min, sdb->max);
 452                                 break;
 453                         }
 454                         case SLE_VAR_U32: {
 455                                 /* Override the minimum value. No value below sdb->min, except special value 0 */
 456                                 uint min = ((sdb->flags & SGF_0ISDISABLED) && (uint)val <= (uint)sdb->min) ? 0 : sdb->min;
 457                                 WriteValue(ptr, SLE_VAR_U32, (int64)ClampU(val, min, sdb->max));
 458                                 return;
 459                         }
 460                         case SLE_VAR_I64:
 461                         case SLE_VAR_U64:
 462                         default: NOT_REACHED();
 463                 }
 464         }
 465
 466         WriteValue(ptr, sd->save.conv, (int64)val);
 467 }
 468
 469 /**
 470  * Load values from a group of an IniFile structure into the internal representation
 471  * @param ini pointer to IniFile structure that holds administrative information
 472  * @param sd pointer to SettingDesc structure whose internally pointed variables will
 473  *        be given values
 474  * @param grpname the group of the IniFile to search in for the new values
 475  * @param object pointer to the object been loaded
 476  */
 477 static void IniLoadSettings(IniFile *ini, const SettingDesc *sd, const char *grpname, void *object)
 478 {
 479         IniGroup *group;
 480         IniGroup *group_def = ini->GetGroup(grpname);
 481         IniItem *item;
 482         const void *p;
 483         void *ptr;
 484         const char *s;
 485
 486         for (; sd->save.type != SL_END; sd++) {
 487                 const SettingDescBase *sdb = &sd->desc;
 488                 const SaveLoad        *sld = &sd->save;
 489
 490                 if (!SlIsObjectCurrentlyValid(sld)) continue;
 491
 492                 /* For settings.xx.yy load the settings from [xx] yy = ? */
 493                 s = strchr(sdb->name, '.');
 494                 if (s != NULL) {
 495                         group = ini->GetGroup(sdb->name, s - sdb->name);
 496                         s++;
 497                 } else {
 498                         s = sdb->name;
 499                         group = group_def;
 500                 }
 501
 502                 item = group->GetItem(s, false);
 503                 if (item == NULL && group != group_def) {
 504                         /* For settings.xx.yy load the settings from [settingss] yy = ? in case the previous
 505                          * did not exist (e.g. loading old config files with a [settings] section */
 506                         item = group_def->GetItem(s, false);
 507                 }
 508                 if (item == NULL) {
 509                         /* For settings.xx.zz.yy load the settings from [zz] yy = ? in case the previous
 510                          * did not exist (e.g. loading old config files with a [yapf] section */
 511                         const char *sc = strchr(s, '.');
 512                         if (sc != NULL) item = ini->GetGroup(s, sc - s)->GetItem(sc + 1, false);
 513                 }
 514
 515                 p = (item == NULL) ? sdb->def : StringToVal(sdb, item->value);
 516                 ptr = GetVariableAddress(sld, object);
 517
 518                 switch (sdb->cmd) {
 519                         case SDT_BOOLX: // All four are various types of (integer) numbers
 520                         case SDT_NUMX:
 521                         case SDT_ONEOFMANY:
 522                         case SDT_MANYOFMANY:
 523                                 Write_ValidateSetting(ptr, sd, (int32)(size_t)p);
 524                                 break;
 525
 526                         case SDT_STRING:
 527                                 if (sld->type != SL_STR) {
 528                                         assert(sld->type == SL_VAR);
 529                                         assert(GetVarMemType(sld->conv) == SLE_VAR_CHAR);
 530                                         if (p != NULL) *(char *)ptr = *(const char *)p;
 531                                 } else if (sld->conv & SLS_POINTER) {
 532                                         free(*(char**)ptr);
 533                                         *(char**)ptr = p == NULL ? NULL : strdup((const char*)p);
 534                                 } else {
 535                                         if (p != NULL) ttd_strlcpy((char*)ptr, (const char*)p, sld->length);
 536                                 }
 537                                 break;
 538
 539                         case SDT_INTLIST: {
 540                                 if (!LoadIntList((const char*)p, ptr, sld->length, GetVarMemType(sld->conv))) {
 541                                         ErrorMessageData msg(STR_CONFIG_ERROR, STR_CONFIG_ERROR_ARRAY);
 542                                         msg.SetDParamStr(0, sdb->name);
 543                                         _settings_error_list.push_back(msg);
 544
 545                                         /* Use default */
 546                                         LoadIntList((const char*)sdb->def, ptr, sld->length, GetVarMemType(sld->conv));
 547                                 } else if (sd->desc.proc_cnvt != NULL) {
 548                                         sd->desc.proc_cnvt((const char*)p);
 549                                 }
 550                                 break;
 551                         }
 552                         default: NOT_REACHED();
 553                 }
 554         }
 555 }
 556
 557 /**
 558  * Save the values of settings to the inifile.
 559  * @param ini pointer to IniFile structure
 560  * @param sd read-only SettingDesc structure which contains the unmodified,
 561  *        loaded values of the configuration file and various information about it
 562  * @param grpname holds the name of the group (eg. [network]) where these will be saved
 563  * @param object pointer to the object been saved
 564  * The function works as follows: for each item in the SettingDesc structure we
 565  * have a look if the value has changed since we started the game (the original
 566  * values are reloaded when saving). If settings indeed have changed, we get
 567  * these and save them.
 568  */
 569 static void IniSaveSettings(IniFile *ini, const SettingDesc *sd, const char *grpname, void *object)
 570 {
 571         IniGroup *group_def = NULL, *group;
 572         IniItem *item;
 573         char buf[512];
 574         const char *s;
 575         void *ptr;
 576
 577         for (; sd->save.type != SL_END; sd++) {
 578                 const SettingDescBase *sdb = &sd->desc;
 579                 const SaveLoad        *sld = &sd->save;
 580
 581                 /* If the setting is not saved to the configuration
 582                  * file, just continue with the next setting */
 583                 if (!SlIsObjectCurrentlyValid(sld)) continue;
 584                 if (sld->flags & SLF_NOT_IN_CONFIG) continue;
 585
 586                 /* XXX - wtf is this?? (group override?) */
 587                 s = strchr(sdb->name, '.');
 588                 if (s != NULL) {
 589                         group = ini->GetGroup(sdb->name, s - sdb->name);
 590                         s++;
 591                 } else {
 592                         if (group_def == NULL) group_def = ini->GetGroup(grpname);
 593                         s = sdb->name;
 594                         group = group_def;
 595                 }
 596
 597                 item = group->GetItem(s, true);
 598                 ptr = GetVariableAddress(sld, object);
 599
 600                 if (item->value != NULL) {
 601                         /* check if the value is the same as the old value */
 602                         const void *p = StringToVal(sdb, item->value);
 603
 604                         /* The main type of a variable/setting is in bytes 8-15
 605                          * The subtype (what kind of numbers do we have there) is in 0-7 */
 606                         switch (sdb->cmd) {
 607                                 case SDT_BOOLX:
 608                                 case SDT_NUMX:
 609                                 case SDT_ONEOFMANY:
 610                                 case SDT_MANYOFMANY:
 611                                         assert(sld->type == SL_VAR);
 612                                         switch (GetVarMemType(sld->conv)) {
 613                                                 case SLE_VAR_BL:
 614                                                         if (*(bool*)ptr == (p != NULL)) continue;
 615                                                         break;
 616
 617                                                 case SLE_VAR_I8:
 618                                                 case SLE_VAR_U8:
 619                                                         if (*(byte*)ptr == (byte)(size_t)p) continue;
 620                                                         break;
 621
 622                                                 case SLE_VAR_I16:
 623                                                 case SLE_VAR_U16:
 624                                                         if (*(uint16*)ptr == (uint16)(size_t)p) continue;
 625                                                         break;
 626
 627                                                 case SLE_VAR_I32:
 628                                                 case SLE_VAR_U32:
 629                                                         if (*(uint32*)ptr == (uint32)(size_t)p) continue;
 630                                                         break;
 631
 632                                                 default: NOT_REACHED();
 633                                         }
 634                                         break;
 635
 636                                 default: break; // Assume the other types are always changed
 637                         }
 638                 }
 639
 640                 /* Value has changed, get the new value and put it into a buffer */
 641                 switch (sdb->cmd) {
 642                         case SDT_BOOLX:
 643                         case SDT_NUMX:
 644                         case SDT_ONEOFMANY:
 645                         case SDT_MANYOFMANY: {
 646                                 uint32 i = (uint32)ReadValue(ptr, sld->conv);
 647
 648                                 switch (sdb->cmd) {
 649                                         case SDT_BOOLX:      strecpy(buf, (i != 0) ? "true" : "false", lastof(buf)); break;
 650                                         case SDT_NUMX:       seprintf(buf, lastof(buf), IsSignedVarMemType(sld->conv) ? "%d" : "%u", i); break;
 651                                         case SDT_ONEOFMANY:  MakeOneOfMany(buf, lastof(buf), sdb->many, i); break;
 652                                         case SDT_MANYOFMANY: MakeManyOfMany(buf, lastof(buf), sdb->many, i); break;
 653                                         default: NOT_REACHED();
 654                                 }
 655                                 break;
 656                         }
 657
 658                         case SDT_STRING:
 659                                 if (sld->type != SL_STR) {
 660                                         assert(sld->type == SL_VAR);
 661                                         assert(GetVarMemType(sld->conv) == SLE_VAR_CHAR);
 662                                         buf[0] = *(char*)ptr;
 663                                         buf[1] = '\0';
 664                                 } else {
 665                                         const char *s;
 666
 667                                         if (sld->conv & SLS_POINTER) {
 668                                                 s = *(const char *const *)ptr;
 669                                         } else {
 670                                                 s = (const char *)ptr;
 671                                         }
 672
 673                                         if (sld->conv & SLS_QUOTED) {
 674                                                 if (s == NULL) {
 675                                                         buf[0] = '\0';
 676                                                 } else {
 677                                                         seprintf(buf, lastof(buf), "\"%s\"", s);
 678                                                 }
 679                                         } else {
 680                                                 strecpy(buf, s, lastof(buf));
 681                                         }
 682                                 }
 683                                 break;
 684
 685                         case SDT_INTLIST:
 686                                 MakeIntList(buf, lastof(buf), ptr, sld->length, GetVarMemType(sld->conv));
 687                                 break;
 688
 689                         default: NOT_REACHED();
 690                 }
 691
 692                 /* The value is different, that means we have to write it to the ini */
 693                 free(item->value);
 694                 item->value = strdup(buf);
 695         }
 696 }
 697
 698 /**
 699  * Loads all items from a 'grpname' section into a list
 700  * The list parameter can be a NULL pointer, in this case nothing will be
 701  * saved and a callback function should be defined that will take over the
 702  * list-handling and store the data itself somewhere.
 703  * @param ini IniFile handle to the ini file with the source data
 704  * @param grpname character string identifying the section-header of the ini file that will be parsed
 705  * @param list new list with entries of the given section
 706  */
 707 static void IniLoadSettingList(IniFile *ini, const char *grpname, StringList *list)
 708 {
 709         IniGroup *group = ini->GetGroup(grpname);
 710
 711         if (group == NULL || list == NULL) return;
 712
 713         list->Clear();
 714
 715         for (const IniItem *item = group->item; item != NULL; item = item->next) {
 716                 if (item->name != NULL) *list->Append() = strdup(item->name);
 717         }
 718 }
 719
 720 /**
 721  * Saves all items from a list into the 'grpname' section
 722  * The list parameter can be a NULL pointer, in this case a callback function
 723  * should be defined that will provide the source data to be saved.
 724  * @param ini IniFile handle to the ini file where the destination data is saved
 725  * @param grpname character string identifying the section-header of the ini file
 726  * @param list pointer to an string(pointer) array that will be used as the
 727  *             source to be saved into the relevant ini section
 728  */
 729 static void IniSaveSettingList(IniFile *ini, const char *grpname, StringList *list)
 730 {
 731         IniGroup *group = ini->GetGroup(grpname);
 732
 733         if (group == NULL || list == NULL) return;
 734         group->Clear();
 735
 736         for (char **iter = list->Begin(); iter != list->End(); iter++) {
 737                 group->GetItem(*iter, true)->SetValue("");
 738         }
 739 }
 740
 741 /**
 742  * Load a WindowDesc from config.
 743  * @param ini IniFile handle to the ini file with the source data
 744  * @param grpname character string identifying the section-header of the ini file that will be parsed
 745  * @param desc Destination WindowDesc
 746  */
 747 void IniLoadWindowSettings(IniFile *ini, const char *grpname, void *desc)
 748 {
 749         IniLoadSettings(ini, _window_settings, grpname, desc);
 750 }
 751
 752 /**
 753  * Save a WindowDesc to config.
 754  * @param ini IniFile handle to the ini file where the destination data is saved
 755  * @param grpname character string identifying the section-header of the ini file
 756  * @param desc Source WindowDesc
 757  */
 758 void IniSaveWindowSettings(IniFile *ini, const char *grpname, void *desc)
 759 {
 760         IniSaveSettings(ini, _window_settings, grpname, desc);
 761 }
 762
 763 /**
 764  * Check whether the setting is editable in the current gamemode.
 765  * @param do_command true if this is about checking a command from the server.
 766  * @return true if editable.
 767  */
 768 bool SettingDesc::IsEditable(bool do_command) const
 769 {
 770         if (!do_command && !(this->save.flags & SLF_NO_NETWORK_SYNC) && _networking && !_network_server && !(this->desc.flags & SGF_PER_COMPANY)) return false;
 771         if ((this->desc.flags & SGF_NETWORK_ONLY) && !_networking && _game_mode != GM_MENU) return false;
 772         if ((this->desc.flags & SGF_NO_NETWORK) && _networking) return false;
 773         if ((this->desc.flags & SGF_NEWGAME_ONLY) &&
 774                         (_game_mode == GM_NORMAL ||
 775                         (_game_mode == GM_EDITOR && !(this->desc.flags & SGF_SCENEDIT_TOO)))) return false;
 776         return true;
 777 }
 778
 779 /**
 780  * Return the type of the setting.
 781  * @return type of setting
 782  */
 783 SettingType SettingDesc::GetType() const
 784 {
 785         if (this->desc.flags & SGF_PER_COMPANY) return ST_COMPANY;
 786         return (this->save.flags & SLF_NOT_IN_SAVE) ? ST_CLIENT : ST_GAME;
 787 }
 788
 789 /* Begin - Callback Functions for the various settings. */
 790
 791 /** Reposition the main toolbar as the setting changed. */
 792 static bool v_PositionMainToolbar(int32 p1)
 793 {
 794         if (_game_mode != GM_MENU) PositionMainToolbar(NULL);
 795         return true;
 796 }
 797
 798 /** Reposition the statusbar as the setting changed. */
 799 static bool v_PositionStatusbar(int32 p1)
 800 {
 801         if (_game_mode != GM_MENU) {
 802                 PositionStatusbar(NULL);
 803                 PositionNewsMessage(NULL);
 804                 PositionNetworkChatWindow(NULL);
 805         }
 806         return true;
 807 }
 808
 809 static bool PopulationInLabelActive(int32 p1)
 810 {
 811         UpdateAllTownVirtCoords();
 812         return true;
 813 }
 814
 815 static bool RedrawScreen(int32 p1)
 816 {
 817         MarkWholeScreenDirty();
 818         return true;
 819 }
 820
 821 /**
 822  * Redraw the smallmap after a colour scheme change.
 823  * @param p1 Callback parameter.
 824  * @return Always true.
 825  */
 826 static bool RedrawSmallmap(int32 p1)
 827 {
 828         BuildLandLegend();
 829         BuildOwnerLegend();
 830         SetWindowClassesDirty(WC_SMALLMAP);
 831         return true;
 832 }
 833
 834 static bool InvalidateDetailsWindow(int32 p1)
 835 {
 836         SetWindowClassesDirty(WC_VEHICLE_DETAILS);
 837         return true;
 838 }
 839
 840 static bool StationSpreadChanged(int32 p1)
 841 {
 842         InvalidateWindowData(WC_SELECT_STATION, 0);
 843         InvalidateWindowData(WC_BUILD_STATION, 0);
 844         return true;
 845 }
 846
 847 static bool InvalidateBuildIndustryWindow(int32 p1)
 848 {
 849         InvalidateWindowData(WC_BUILD_INDUSTRY, 0);
 850         return true;
 851 }
 852
 853 static bool CloseSignalGUI(int32 p1)
 854 {
 855         if (p1 == 0) {
 856                 DeleteWindowByClass(WC_BUILD_SIGNAL);
 857         }
 858         return true;
 859 }
 860
 861 static bool InvalidateTownViewWindow(int32 p1)
 862 {
 863         InvalidateWindowClassesData(WC_TOWN_VIEW, p1);
 864         return true;
 865 }
 866
 867 static bool DeleteSelectStationWindow(int32 p1)
 868 {
 869         DeleteWindowById(WC_SELECT_STATION, 0);
 870         return true;
 871 }
 872
 873 static bool UpdateConsists(int32 p1)
 874 {
 875         Train *t;
 876         FOR_ALL_TRAINS(t) {
 877                 /* Update the consist of all trains so the maximum speed is set correctly. */
 878                 if (t->IsFrontEngine() || t->IsFreeWagon()) t->ConsistChanged(CCF_TRACK);
 879         }
 880         InvalidateWindowClassesData(WC_BUILD_VEHICLE, 0);
 881         return true;
 882 }
 883
 884 /* Check service intervals of vehicles, p1 is value of % or day based servicing */
 885 static bool CheckInterval(int32 p1)
 886 {
 887         bool update_vehicles;
 888         VehicleDefaultSettings *vds;
 889         if (_game_mode == GM_MENU || !Company::IsValidID(_current_company)) {
 890                 vds = &_settings_client.company.vehicle;
 891                 update_vehicles = false;
 892         } else {
 893                 vds = &Company::Get(_current_company)->settings.vehicle;
 894                 update_vehicles = true;
 895         }
 896
 897         if (p1 != 0) {
 898                 vds->servint_trains   = 50;
 899                 vds->servint_roadveh  = 50;
 900                 vds->servint_aircraft = 50;
 901                 vds->servint_ships    = 50;
 902         } else {
 903                 vds->servint_trains   = 150;
 904                 vds->servint_roadveh  = 150;
 905                 vds->servint_aircraft = 100;
 906                 vds->servint_ships    = 360;
 907         }
 908
 909         if (update_vehicles) {
 910                 const Company *c = Company::Get(_current_company);
 911                 Vehicle *v;
 912                 FOR_ALL_VEHICLES(v) {
 913                         if (v->owner == _current_company && v->IsPrimaryVehicle() && !v->ServiceIntervalIsCustom()) {
 914                                 v->SetServiceInterval(CompanyServiceInterval(c, v->type));
 915                                 v->SetServiceIntervalIsPercent(p1 != 0);
 916                         }
 917                 }
 918         }
 919
 920         InvalidateDetailsWindow(0);
 921
 922         return true;
 923 }
 924
 925 static bool UpdateInterval(VehicleType type, int32 p1)
 926 {
 927         bool update_vehicles;
 928         VehicleDefaultSettings *vds;
 929         if (_game_mode == GM_MENU || !Company::IsValidID(_current_company)) {
 930                 vds = &_settings_client.company.vehicle;
 931                 update_vehicles = false;
 932         } else {
 933                 vds = &Company::Get(_current_company)->settings.vehicle;
 934                 update_vehicles = true;
 935         }
 936
 937         /* Test if the interval is valid */
 938         uint16 interval = GetServiceIntervalClamped(p1, vds->servint_ispercent);
 939         if (interval != p1) return false;
 940
 941         if (update_vehicles) {
 942                 Vehicle *v;
 943                 FOR_ALL_VEHICLES(v) {
 944                         if (v->owner == _current_company && v->type == type && v->IsPrimaryVehicle() && !v->ServiceIntervalIsCustom()) {
 945                                 v->SetServiceInterval(p1);
 946                         }
 947                 }
 948         }
 949
 950         InvalidateDetailsWindow(0);
 951
 952         return true;
 953 }
 954
 955 static bool UpdateIntervalTrains(int32 p1)
 956 {
 957         return UpdateInterval(VEH_TRAIN, p1);
 958 }
 959
 960 static bool UpdateIntervalRoadVeh(int32 p1)
 961 {
 962         return UpdateInterval(VEH_ROAD, p1);
 963 }
 964
 965 static bool UpdateIntervalShips(int32 p1)
 966 {
 967         return UpdateInterval(VEH_SHIP, p1);
 968 }
 969
 970 static bool UpdateIntervalAircraft(int32 p1)
 971 {
 972         return UpdateInterval(VEH_AIRCRAFT, p1);
 973 }
 974
 975 static bool TrainAccelerationModelChanged(int32 p1)
 976 {
 977         Train *t;
 978         FOR_ALL_TRAINS(t) {
 979                 if (t->IsFrontEngine()) {
 980                         t->tcache.cached_max_curve_speed = t->GetCurveSpeedLimit();
 981                         t->UpdateAcceleration();
 982                 }
 983         }
 984
 985         /* These windows show acceleration values only when realistic acceleration is on. They must be redrawn after a setting change. */
 986         SetWindowClassesDirty(WC_ENGINE_PREVIEW);
 987         InvalidateWindowClassesData(WC_BUILD_VEHICLE, 0);
 988         SetWindowClassesDirty(WC_VEHICLE_DETAILS);
 989
 990         return true;
 991 }
 992
 993 /**
 994  * This function updates the train acceleration cache after a steepness change.
 995  * @param p1 Callback parameter.
 996  * @return Always true.
 997  */
 998 static bool TrainSlopeSteepnessChanged(int32 p1)
 999 {
1000         Train *t;
1001         FOR_ALL_TRAINS(t) {
1002                 if (t->IsFrontEngine()) t->CargoChanged();
1003         }
1004
1005         return true;
1006 }
1007
1008 /**
1009  * This function updates realistic acceleration caches when the setting "Road vehicle acceleration model" is set.
1010  * @param p1 Callback parameter
1011  * @return Always true
1012  */
1013 static bool RoadVehAccelerationModelChanged(int32 p1)
1014 {
1015         if (_settings_game.vehicle.roadveh_acceleration_model != AM_ORIGINAL) {
1016                 RoadVehicle *rv;
1017                 FOR_ALL_ROADVEHICLES(rv) {
1018                         if (rv->IsFrontEngine()) {
1019                                 rv->CargoChanged();
1020                         }
1021                 }
1022         }
1023
1024         /* These windows show acceleration values only when realistic acceleration is on. They must be redrawn after a setting change. */
1025         SetWindowClassesDirty(WC_ENGINE_PREVIEW);
1026         InvalidateWindowClassesData(WC_BUILD_VEHICLE, 0);
1027         SetWindowClassesDirty(WC_VEHICLE_DETAILS);
1028
1029         return true;
1030 }
1031
1032 /**
1033  * This function updates the road vehicle acceleration cache after a steepness change.
1034  * @param p1 Callback parameter.
1035  * @return Always true.
1036  */
1037 static bool RoadVehSlopeSteepnessChanged(int32 p1)
1038 {
1039         RoadVehicle *rv;
1040         FOR_ALL_ROADVEHICLES(rv) {
1041                 if (rv->IsFrontEngine()) rv->CargoChanged();
1042         }
1043
1044         return true;
1045 }
1046
1047 static bool DragSignalsDensityChanged(int32)
1048 {
1049         InvalidateWindowData(WC_BUILD_SIGNAL, 0);
1050
1051         return true;
1052 }
1053
1054 static bool TownFoundingChanged(int32 p1)
1055 {
1056         if (_game_mode != GM_EDITOR && _settings_game.economy.found_town == TF_FORBIDDEN) {
1057                 DeleteWindowById(WC_FOUND_TOWN, 0);
1058                 return true;
1059         }
1060         InvalidateWindowData(WC_FOUND_TOWN, 0);
1061         return true;
1062 }
1063
1064 static bool InvalidateVehTimetableWindow(int32 p1)
1065 {
1066         InvalidateWindowClassesData(WC_VEHICLE_TIMETABLE, VIWD_MODIFY_ORDERS);
1067         return true;
1068 }
1069
1070 static bool ZoomMinMaxChanged(int32 p1)
1071 {
1072         extern void ConstrainAllViewportsZoom();
1073         ConstrainAllViewportsZoom();
1074         GfxClearSpriteCache();
1075         return true;
1076 }
1077
1078 /**
1079  * Update any possible saveload window and delete any newgrf dialogue as
1080  * its widget parts might change. Reinit all windows as it allows access to the
1081  * newgrf debug button.
1082  * @param p1 unused.
1083  * @return Always true.
1084  */
1085 static bool InvalidateNewGRFChangeWindows(int32 p1)
1086 {
1087         InvalidateWindowClassesData(WC_SAVELOAD);
1088         DeleteWindowByClass(WC_GAME_OPTIONS);
1089         ReInitAllWindows();
1090         return true;
1091 }
1092
1093 static bool InvalidateCompanyLiveryWindow(int32 p1)
1094 {
1095         InvalidateWindowClassesData(WC_COMPANY_COLOUR);
1096         return RedrawScreen(p1);
1097 }
1098
1099 static bool InvalidateIndustryViewWindow(int32 p1)
1100 {
1101         InvalidateWindowClassesData(WC_INDUSTRY_VIEW);
1102         return true;
1103 }
1104
1105 static bool InvalidateAISettingsWindow(int32 p1)
1106 {
1107         InvalidateWindowClassesData(WC_AI_SETTINGS);
1108         return true;
1109 }
1110
1111 /**
1112  * Update the town authority window after a town authority setting change.
1113  * @param p1 Unused.
1114  * @return Always true.
1115  */
1116 static bool RedrawTownAuthority(int32 p1)
1117 {
1118         SetWindowClassesDirty(WC_TOWN_AUTHORITY);
1119         return true;
1120 }
1121
1122 /**
1123  * Invalidate the company infrastructure details window after a infrastructure maintenance setting change.
1124  * @param p1 Unused.
1125  * @return Always true.
1126  */
1127 static bool InvalidateCompanyInfrastructureWindow(int32 p1)
1128 {
1129         InvalidateWindowClassesData(WC_COMPANY_INFRASTRUCTURE);
1130         return true;
1131 }
1132
1133 /**
1134  * Invalidate the company details window after the shares setting changed.
1135  * @param p1 Unused.
1136  * @return Always true.
1137  */
1138 static bool InvalidateCompanyWindow(int32 p1)
1139 {
1140         InvalidateWindowClassesData(WC_COMPANY);
1141         return true;
1142 }
1143
1144 /** Checks if any settings are set to incorrect values, and sets them to correct values in that case. */
1145 static void ValidateSettings()
1146 {
1147         /* Do not allow a custom sea level with the original land generator. */
1148         if (_settings_newgame.game_creation.land_generator == 0 &&
1149                         _settings_newgame.difficulty.quantity_sea_lakes == CUSTOM_SEA_LEVEL_NUMBER_DIFFICULTY) {
1150                 _settings_newgame.difficulty.quantity_sea_lakes = CUSTOM_SEA_LEVEL_MIN_PERCENTAGE;
1151         }
1152 }
1153
1154 static bool DifficultyNoiseChange(int32 i)
1155 {
1156         if (_game_mode == GM_NORMAL) {
1157                 UpdateAirportsNoise();
1158                 if (_settings_game.economy.station_noise_level) {
1159                         InvalidateWindowClassesData(WC_TOWN_VIEW, 0);
1160                 }
1161         }
1162
1163         return true;
1164 }
1165
1166 static bool MaxNoAIsChange(int32 i)
1167 {
1168         if (GetGameSettings().difficulty.max_no_competitors != 0 &&
1169                         AI::GetInfoList()->size() == 0 &&
1170                         (!_networking || _network_server)) {
1171                 ShowErrorMessage(STR_WARNING_NO_SUITABLE_AI, INVALID_STRING_ID, WL_CRITICAL);
1172         }
1173
1174         return true;
1175 }
1176
1177 /**
1178  * Check whether the road side may be changed.
1179  * @param p1 unused
1180  * @return true if the road side may be changed.
1181  */
1182 static bool CheckRoadSide(int p1)
1183 {
1184         extern bool RoadVehiclesAreBuilt();
1185         return _game_mode == GM_MENU || !RoadVehiclesAreBuilt();
1186 }
1187
1188 /**
1189  * Conversion callback for _gameopt_settings_game.landscape
1190  * It converts (or try) between old values and the new ones,
1191  * without losing initial setting of the user
1192  * @param value that was read from config file
1193  * @return the "hopefully" converted value
1194  */
1195 static size_t ConvertLandscape(const char *value)
1196 {
1197         /* try with the old values */
1198         return LookupOneOfMany("normal|hilly|desert|candy", value);
1199 }
1200
1201 static bool CheckFreeformEdges(int32 p1)
1202 {
1203         if (_game_mode == GM_MENU) return true;
1204         if (p1 != 0) {
1205                 Ship *s;
1206                 FOR_ALL_SHIPS(s) {
1207                         /* Check if there is a ship on the northern border. */
1208                         if (TileX(s->tile) == 0 || TileY(s->tile) == 0) {
1209                                 ShowErrorMessage(STR_CONFIG_SETTING_EDGES_NOT_EMPTY, INVALID_STRING_ID, WL_ERROR);
1210                                 return false;
1211                         }
1212                 }
1213                 BaseStation *st;
1214                 FOR_ALL_BASE_STATIONS(st) {
1215                         /* Check if there is a non-deleted buoy on the northern border. */
1216                         if (st->IsInUse() && (TileX(st->xy) == 0 || TileY(st->xy) == 0)) {
1217                                 ShowErrorMessage(STR_CONFIG_SETTING_EDGES_NOT_EMPTY, INVALID_STRING_ID, WL_ERROR);
1218                                 return false;
1219                         }
1220                 }
1221                 for (uint i = 0; i < MapSizeX(); i++) MakeVoid(TileXY(i, 0));
1222                 for (uint i = 0; i < MapSizeY(); i++) MakeVoid(TileXY(0, i));
1223         } else {
1224                 for (uint i = 0; i < MapMaxX(); i++) {
1225                         if (TileHeight(TileXY(i, 1)) != 0) {
1226                                 ShowErrorMessage(STR_CONFIG_SETTING_EDGES_NOT_WATER, INVALID_STRING_ID, WL_ERROR);
1227                                 return false;
1228                         }
1229                 }
1230                 for (uint i = 1; i < MapMaxX(); i++) {
1231                         if (!IsWaterTile(TileXY(i, MapMaxY() - 1)) || TileHeight(TileXY(1, MapMaxY())) != 0) {
1232                                 ShowErrorMessage(STR_CONFIG_SETTING_EDGES_NOT_WATER, INVALID_STRING_ID, WL_ERROR);
1233                                 return false;
1234                         }
1235                 }
1236                 for (uint i = 0; i < MapMaxY(); i++) {
1237                         if (TileHeight(TileXY(1, i)) != 0) {
1238                                 ShowErrorMessage(STR_CONFIG_SETTING_EDGES_NOT_WATER, INVALID_STRING_ID, WL_ERROR);
1239                                 return false;
1240                         }
1241                 }
1242                 for (uint i = 1; i < MapMaxY(); i++) {
1243                         if (!IsWaterTile(TileXY(MapMaxX() - 1, i)) || TileHeight(TileXY(MapMaxX(), i)) != 0) {
1244                                 ShowErrorMessage(STR_CONFIG_SETTING_EDGES_NOT_WATER, INVALID_STRING_ID, WL_ERROR);
1245                                 return false;
1246                         }
1247                 }
1248                 /* Make tiles at the border water again. */
1249                 for (uint i = 0; i < MapMaxX(); i++) {
1250                         SetTileHeight(TileXY(i, 0), 0);
1251                         MakeSea(TileXY(i, 0));
1252                 }
1253                 for (uint i = 0; i < MapMaxY(); i++) {
1254                         SetTileHeight(TileXY(0, i), 0);
1255                         MakeSea(TileXY(0, i));
1256                 }
1257         }
1258         MarkWholeScreenDirty();
1259         return true;
1260 }
1261
1262 /**
1263  * Changing the setting "allow multiple NewGRF sets" is not allowed
1264  * if there are vehicles.
1265  */
1266 static bool ChangeDynamicEngines(int32 p1)
1267 {
1268         if (_game_mode == GM_MENU) return true;
1269
1270         if (!EngineOverrideManager::ResetToCurrentNewGRFConfig()) {
1271                 ShowErrorMessage(STR_CONFIG_SETTING_DYNAMIC_ENGINES_EXISTING_VEHICLES, INVALID_STRING_ID, WL_ERROR);
1272                 return false;
1273         }
1274
1275         return true;
1276 }
1277
1278 static bool StationCatchmentChanged(int32 p1)
1279 {
1280         Station::RecomputeIndustriesNearForAll();
1281         return true;
1282 }
1283
1284
1285 #ifdef ENABLE_NETWORK
1286
1287 static bool UpdateClientName(int32 p1)
1288 {
1289         NetworkUpdateClientName();
1290         return true;
1291 }
1292
1293 static bool UpdateServerPassword(int32 p1)
1294 {
1295         if (strcmp(_settings_client.network.server_password, "*") == 0) {
1296                 _settings_client.network.server_password[0] = '\0';
1297         }
1298
1299         return true;
1300 }
1301
1302 static bool UpdateRconPassword(int32 p1)
1303 {
1304         if (strcmp(_settings_client.network.rcon_password, "*") == 0) {
1305                 _settings_client.network.rcon_password[0] = '\0';
1306         }
1307
1308         return true;
1309 }
1310
1311 static bool UpdateClientConfigValues(int32 p1)
1312 {
1313         if (_network_server) NetworkServerSendConfigUpdate();
1314
1315         return true;
1316 }
1317
1318 #endif /* ENABLE_NETWORK */
1319
1320
1321 /* End - Callback Functions */
1322
1323 /**
1324  * Prepare for reading and old diff_custom by zero-ing the memory.
1325  */
1326 static void PrepareOldDiffCustom()
1327 {
1328         memset(_old_diff_custom, 0, sizeof(_old_diff_custom));
1329 }
1330
1331 /**
1332  * Reading of the old diff_custom array and transforming it to the new format.
1333  * @param stv Savegame type and version; or NULL if reading from config.
1334  *                 In the former case we are sure there is an array;
1335  *                 in the latter case we have to check that.
1336  */
1337 static void HandleOldDiffCustom(const SavegameTypeVersion *stv)
1338 {
1339         uint options_to_load = GAME_DIFFICULTY_NUM - ((stv != NULL && IsOTTDSavegameVersionBefore(stv, 4)) ? 1 : 0);
1340
1341         if (stv == NULL) {
1342                 /* If we did read to old_diff_custom, then at least one value must be non 0. */
1343                 bool old_diff_custom_used = false;
1344                 for (uint i = 0; i < options_to_load && !old_diff_custom_used; i++) {
1345                         old_diff_custom_used = (_old_diff_custom[i] != 0);
1346                 }
1347
1348                 if (!old_diff_custom_used) return;
1349         }
1350
1351         for (uint i = 0; i < options_to_load; i++) {
1352                 const SettingDesc *sd = &_settings[i];
1353                 /* Skip deprecated options */
1354                 if (!SlIsObjectCurrentlyValid(&sd->save)) continue;
1355                 void *var = GetVariableAddress(&sd->save, stv != NULL ? &_settings_game : &_settings_newgame);
1356                 Write_ValidateSetting(var, sd, (int32)((i == 4 ? 1000 : 1) * _old_diff_custom[i]));
1357         }
1358 }
1359
1360 static void AILoadConfig(IniFile *ini, const char *grpname)
1361 {
1362         IniGroup *group = ini->GetGroup(grpname);
1363         IniItem *item;
1364
1365         /* Clean any configured AI */
1366         for (CompanyID c = COMPANY_FIRST; c < MAX_COMPANIES; c++) {
1367                 AIConfig::GetConfig(c, AIConfig::SSS_FORCE_NEWGAME)->Change(NULL);
1368         }
1369
1370         /* If no group exists, return */
1371         if (group == NULL) return;
1372
1373         CompanyID c = COMPANY_FIRST;
1374         for (item = group->item; c < MAX_COMPANIES && item != NULL; c++, item = item->next) {
1375                 AIConfig *config = AIConfig::GetConfig(c, AIConfig::SSS_FORCE_NEWGAME);
1376
1377                 config->Change(item->name);
1378                 if (!config->HasScript()) {
1379                         if (strcmp(item->name, "none") != 0) {
1380                                 DEBUG(script, 0, "The AI by the name '%s' was no longer found, and removed from the list.", item->name);
1381                                 continue;
1382                         }
1383                 }
1384                 if (item->value != NULL) config->StringToSettings(item->value);
1385         }
1386 }
1387
1388 static void GameLoadConfig(IniFile *ini, const char *grpname)
1389 {
1390         IniGroup *group = ini->GetGroup(grpname);
1391         IniItem *item;
1392
1393         /* Clean any configured GameScript */
1394         GameConfig::GetConfig(GameConfig::SSS_FORCE_NEWGAME)->Change(NULL);
1395
1396         /* If no group exists, return */
1397         if (group == NULL) return;
1398
1399         item = group->item;
1400         if (item == NULL) return;
1401
1402         GameConfig *config = GameConfig::GetConfig(AIConfig::SSS_FORCE_NEWGAME);
1403
1404         config->Change(item->name);
1405         if (!config->HasScript()) {
1406                 if (strcmp(item->name, "none") != 0) {
1407                         DEBUG(script, 0, "The GameScript by the name '%s' was no longer found, and removed from the list.", item->name);
1408                         return;
1409                 }
1410         }
1411         if (item->value != NULL) config->StringToSettings(item->value);
1412 }
1413
1414 /**
1415  * Load a GRF configuration
1416  * @param ini       The configuration to read from.
1417  * @param grpname   Group name containing the configuration of the GRF.
1418  * @param is_static GRF is static.
1419  */
1420 static GRFConfig *GRFLoadConfig(IniFile *ini, const char *grpname, bool is_static)
1421 {
1422         IniGroup *group = ini->GetGroup(grpname);
1423         IniItem *item;
1424         GRFConfig *first = NULL;
1425         GRFConfig **curr = &first;
1426
1427         if (group == NULL) return NULL;
1428
1429         for (item = group->item; item != NULL; item = item->next) {
1430                 GRFConfig *c = new GRFConfig(item->name);
1431
1432                 /* Parse parameters */
1433                 if (!StrEmpty(item->value)) {
1434                         c->num_params = ParseIntList(item->value, (int*)c->param, lengthof(c->param));
1435                         if (c->num_params == (byte)-1) {
1436                                 SetDParamStr(0, item->name);
1437                                 ShowErrorMessage(STR_CONFIG_ERROR, STR_CONFIG_ERROR_ARRAY, WL_CRITICAL);
1438                                 c->num_params = 0;
1439                         }
1440                 }
1441
1442                 /* Check if item is valid */
1443                 if (!FillGRFDetails(c, is_static) || HasBit(c->flags, GCF_INVALID)) {
1444                         if (c->status == GCS_NOT_FOUND) {
1445                                 SetDParam(1, STR_CONFIG_ERROR_INVALID_GRF_NOT_FOUND);
1446                         } else if (HasBit(c->flags, GCF_UNSAFE)) {
1447                                 SetDParam(1, STR_CONFIG_ERROR_INVALID_GRF_UNSAFE);
1448                         } else if (HasBit(c->flags, GCF_SYSTEM)) {
1449                                 SetDParam(1, STR_CONFIG_ERROR_INVALID_GRF_SYSTEM);
1450                         } else if (HasBit(c->flags, GCF_INVALID)) {
1451                                 SetDParam(1, STR_CONFIG_ERROR_INVALID_GRF_INCOMPATIBLE);
1452                         } else {
1453                                 SetDParam(1, STR_CONFIG_ERROR_INVALID_GRF_UNKNOWN);
1454                         }
1455
1456                         SetDParamStr(0, item->name);
1457                         ShowErrorMessage(STR_CONFIG_ERROR, STR_CONFIG_ERROR_INVALID_GRF, WL_CRITICAL);
1458                         delete c;
1459                         continue;
1460                 }
1461
1462                 /* Check for duplicate GRFID (will also check for duplicate filenames) */
1463                 bool duplicate = false;
1464                 for (const GRFConfig *gc = first; gc != NULL; gc = gc->next) {
1465                         if (gc->ident.grfid == c->ident.grfid) {
1466                                 SetDParamStr(0, item->name);
1467                                 SetDParamStr(1, gc->filename);
1468                                 ShowErrorMessage(STR_CONFIG_ERROR, STR_CONFIG_ERROR_DUPLICATE_GRFID, WL_CRITICAL);
1469                                 duplicate = true;
1470                                 break;
1471                         }
1472                 }
1473                 if (duplicate) {
1474                         delete c;
1475                         continue;
1476                 }
1477
1478                 /* Mark file as static to avoid saving in savegame. */
1479                 if (is_static) SetBit(c->flags, GCF_STATIC);
1480
1481                 /* Add item to list */
1482                 *curr = c;
1483                 curr = &c->next;
1484         }
1485
1486         return first;
1487 }
1488
1489 static void AISaveConfig(IniFile *ini, const char *grpname)
1490 {
1491         IniGroup *group = ini->GetGroup(grpname);
1492
1493         if (group == NULL) return;
1494         group->Clear();
1495
1496         for (CompanyID c = COMPANY_FIRST; c < MAX_COMPANIES; c++) {
1497                 AIConfig *config = AIConfig::GetConfig(c, AIConfig::SSS_FORCE_NEWGAME);
1498                 const char *name;
1499                 char value[1024];
1500                 config->SettingsToString(value, lengthof(value));
1501
1502                 if (config->HasScript()) {
1503                         name = config->GetName();
1504                 } else {
1505                         name = "none";
1506                 }
1507
1508                 IniItem *item = new IniItem(group, name, strlen(name));
1509                 item->SetValue(value);
1510         }
1511 }
1512
1513 static void GameSaveConfig(IniFile *ini, const char *grpname)
1514 {
1515         IniGroup *group = ini->GetGroup(grpname);
1516
1517         if (group == NULL) return;
1518         group->Clear();
1519
1520         GameConfig *config = GameConfig::GetConfig(AIConfig::SSS_FORCE_NEWGAME);
1521         const char *name;
1522         char value[1024];
1523         config->SettingsToString(value, lengthof(value));
1524
1525         if (config->HasScript()) {
1526                 name = config->GetName();
1527         } else {
1528                 name = "none";
1529         }
1530
1531         IniItem *item = new IniItem(group, name, strlen(name));
1532         item->SetValue(value);
1533 }
1534
1535 /**
1536  * Save the version of OpenTTD to the ini file.
1537  * @param ini the ini to write to
1538  */
1539 static void SaveVersionInConfig(IniFile *ini)
1540 {
1541         IniGroup *group = ini->GetGroup("version");
1542
1543         char version[9];
1544         snprintf(version, lengthof(version), "%08X", _openttd_newgrf_version);
1545
1546         const char * const versions[][2] = {
1547                 { "version_string", _openttd_revision },
1548                 { "version_number", version }
1549         };
1550
1551         for (uint i = 0; i < lengthof(versions); i++) {
1552                 group->GetItem(versions[i][0], true)->SetValue(versions[i][1]);
1553         }
1554 }
1555
1556 /* Save a GRF configuration to the given group name */
1557 static void GRFSaveConfig(IniFile *ini, const char *grpname, const GRFConfig *list)
1558 {
1559         ini->RemoveGroup(grpname);
1560         IniGroup *group = ini->GetGroup(grpname);
1561         const GRFConfig *c;
1562
1563         for (c = list; c != NULL; c = c->next) {
1564                 char params[512];
1565                 GRFBuildParamList(params, c, lastof(params));
1566
1567                 group->GetItem(c->filename, true)->SetValue(params);
1568         }
1569 }
1570
1571 /* Common handler for saving/loading variables to the configuration file */
1572 static void HandleSettingDescs(IniFile *ini, SettingDescProc *proc, SettingDescProcList *proc_list, bool basic_settings = true, bool other_settings = true)
1573 {
1574         if (basic_settings) {
1575                 proc(ini, (const SettingDesc*)_misc_settings,    "misc",  NULL);
1576 #if defined(WIN32) && !defined(DEDICATED)
1577                 proc(ini, (const SettingDesc*)_win32_settings,   "win32", NULL);
1578 #endif /* WIN32 */
1579         }
1580
1581         if (other_settings) {
1582                 proc(ini, _settings,         "patches",  &_settings_newgame);
1583                 proc(ini, _currency_settings,"currency", &_custom_currency);
1584                 proc(ini, _company_settings, "company",  &_settings_client.company);
1585
1586 #ifdef ENABLE_NETWORK
1587                 proc_list(ini, "server_bind_addresses", &_network_bind_list);
1588                 proc_list(ini, "servers", &_network_host_list);
1589                 proc_list(ini, "bans",    &_network_ban_list);
1590 #endif /* ENABLE_NETWORK */
1591         }
1592 }
1593
1594 static IniFile *IniLoadConfig()
1595 {
1596         IniFile *ini = new IniFile(_list_group_names);
1597         ini->LoadFromDisk(_config_file, BASE_DIR);
1598         return ini;
1599 }
1600
1601 /**
1602  * Load the values from the configuration files
1603  * @param minimal Load the minimal amount of the configuration to "bootstrap" the blitter and such.
1604  */
1605 void LoadFromConfig(bool minimal)
1606 {
1607         IniFile *ini = IniLoadConfig();
1608         if (!minimal) ResetCurrencies(false); // Initialize the array of currencies, without preserving the custom one
1609
1610         /* Load basic settings only during bootstrap, load other settings not during bootstrap */
1611         HandleSettingDescs(ini, IniLoadSettings, IniLoadSettingList, minimal, !minimal);
1612
1613         if (!minimal) {
1614                 _grfconfig_newgame = GRFLoadConfig(ini, "newgrf", false);
1615                 _grfconfig_static  = GRFLoadConfig(ini, "newgrf-static", true);
1616                 AILoadConfig(ini, "ai_players");
1617                 GameLoadConfig(ini, "game_scripts");
1618
1619                 PrepareOldDiffCustom();
1620                 IniLoadSettings(ini, _gameopt_settings, "gameopt", &_settings_newgame);
1621                 HandleOldDiffCustom(NULL);
1622
1623                 ValidateSettings();
1624
1625                 /* Display sheduled errors */
1626                 extern void ScheduleErrorMessage(ErrorList &datas);
1627                 ScheduleErrorMessage(_settings_error_list);
1628                 if (FindWindowById(WC_ERRMSG, 0) == NULL) ShowFirstError();
1629         }
1630
1631         delete ini;
1632 }
1633
1634 /** Save the values to the configuration file */
1635 void SaveToConfig()
1636 {
1637         IniFile *ini = IniLoadConfig();
1638
1639         /* Remove some obsolete groups. These have all been loaded into other groups. */
1640         ini->RemoveGroup("patches");
1641         ini->RemoveGroup("yapf");
1642         ini->RemoveGroup("gameopt");
1643
1644         HandleSettingDescs(ini, IniSaveSettings, IniSaveSettingList);
1645         GRFSaveConfig(ini, "newgrf", _grfconfig_newgame);
1646         GRFSaveConfig(ini, "newgrf-static", _grfconfig_static);
1647         AISaveConfig(ini, "ai_players");
1648         GameSaveConfig(ini, "game_scripts");
1649         SaveVersionInConfig(ini);
1650         ini->SaveToDisk(_config_file);
1651         delete ini;
1652 }
1653
1654 /**
1655  * Get the list of known NewGrf presets.
1656  * @param list[inout] Pointer to list for storing the preset names.
1657  */
1658 void GetGRFPresetList(GRFPresetList *list)
1659 {
1660         list->Clear();
1661
1662         IniFile *ini = IniLoadConfig();
1663         IniGroup *group;
1664         for (group = ini->group; group != NULL; group = group->next) {
1665                 if (strncmp(group->name, "preset-", 7) == 0) {
1666                         *list->Append() = strdup(group->name + 7);
1667                 }
1668         }
1669
1670         delete ini;
1671 }
1672
1673 /**
1674  * Load a NewGRF configuration by preset-name.
1675  * @param config_name Name of the preset.
1676  * @return NewGRF configuration.
1677  * @see GetGRFPresetList
1678  */
1679 GRFConfig *LoadGRFPresetFromConfig(const char *config_name)
1680 {
1681         char *section = (char*)alloca(strlen(config_name) + 8);
1682         sprintf(section, "preset-%s", config_name);
1683
1684         IniFile *ini = IniLoadConfig();
1685         GRFConfig *config = GRFLoadConfig(ini, section, false);
1686         delete ini;
1687
1688         return config;
1689 }
1690
1691 /**
1692  * Save a NewGRF configuration with a preset name.
1693  * @param config_name Name of the preset.
1694  * @param config      NewGRF configuration to save.
1695  * @see GetGRFPresetList
1696  */
1697 void SaveGRFPresetToConfig(const char *config_name, GRFConfig *config)
1698 {
1699         char *section = (char*)alloca(strlen(config_name) + 8);
1700         sprintf(section, "preset-%s", config_name);
1701
1702         IniFile *ini = IniLoadConfig();
1703         GRFSaveConfig(ini, section, config);
1704         ini->SaveToDisk(_config_file);
1705         delete ini;
1706 }
1707
1708 /**
1709  * Delete a NewGRF configuration by preset name.
1710  * @param config_name Name of the preset.
1711  */
1712 void DeleteGRFPresetFromConfig(const char *config_name)
1713 {
1714         char *section = (char*)alloca(strlen(config_name) + 8);
1715         sprintf(section, "preset-%s", config_name);
1716
1717         IniFile *ini = IniLoadConfig();
1718         ini->RemoveGroup(section);
1719         ini->SaveToDisk(_config_file);
1720         delete ini;
1721 }
1722
1723 const SettingDesc *GetSettingDescription(uint index)
1724 {
1725         if (index >= lengthof(_settings)) return NULL;
1726         return &_settings[index];
1727 }
1728
1729 /**
1730  * Network-safe changing of settings (server-only).
1731  * @param tile unused
1732  * @param flags operation to perform
1733  * @param p1 the index of the setting in the SettingDesc array which identifies it
1734  * @param p2 the new value for the setting
1735  * The new value is properly clamped to its minimum/maximum when setting
1736  * @param text unused
1737  * @return the cost of this operation or an error
1738  * @see _settings
1739  */
1740 CommandCost CmdChangeSetting(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
1741 {
1742         const SettingDesc *sd = GetSettingDescription(p1);
1743
1744         if (sd == NULL) return CMD_ERROR;
1745         if (!SlIsObjectCurrentlyValid(&sd->save)) return CMD_ERROR;
1746
1747         if (!sd->IsEditable(true)) return CMD_ERROR;
1748
1749         if (flags & DC_EXEC) {
1750                 void *var = GetVariableAddress(&sd->save, &GetGameSettings());
1751
1752                 int32 oldval = (int32)ReadValue(var, sd->save.conv);
1753                 int32 newval = (int32)p2;
1754
1755                 Write_ValidateSetting(var, sd, newval);
1756                 newval = (int32)ReadValue(var, sd->save.conv);
1757
1758                 if (oldval == newval) return CommandCost();
1759
1760                 if (sd->desc.proc != NULL && !sd->desc.proc(newval)) {
1761                         WriteValue(var, sd->save.conv, (int64)oldval);
1762                         return CommandCost();
1763                 }
1764
1765                 if (sd->desc.flags & SGF_NO_NETWORK) {
1766                         GamelogSetting(sd->desc.name, oldval, newval);
1767                 }
1768
1769                 SetWindowClassesDirty(WC_GAME_OPTIONS);
1770         }
1771
1772         return CommandCost();
1773 }
1774
1775 /**
1776  * Change one of the per-company settings.
1777  * @param tile unused
1778  * @param flags operation to perform
1779  * @param p1 the index of the setting in the _company_settings array which identifies it
1780  * @param p2 the new value for the setting
1781  * The new value is properly clamped to its minimum/maximum when setting
1782  * @param text unused
1783  * @return the cost of this operation or an error
1784  */
1785 CommandCost CmdChangeCompanySetting(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
1786 {
1787         if (p1 >= lengthof(_company_settings)) return CMD_ERROR;
1788         const SettingDesc *sd = &_company_settings[p1];
1789
1790         if (flags & DC_EXEC) {
1791                 void *var = GetVariableAddress(&sd->save, &Company::Get(_current_company)->settings);
1792
1793                 int32 oldval = (int32)ReadValue(var, sd->save.conv);
1794                 int32 newval = (int32)p2;
1795
1796                 Write_ValidateSetting(var, sd, newval);
1797                 newval = (int32)ReadValue(var, sd->save.conv);
1798
1799                 if (oldval == newval) return CommandCost();
1800
1801                 if (sd->desc.proc != NULL && !sd->desc.proc(newval)) {
1802                         WriteValue(var, sd->save.conv, (int64)oldval);
1803                         return CommandCost();
1804                 }
1805
1806                 SetWindowClassesDirty(WC_GAME_OPTIONS);
1807         }
1808
1809         return CommandCost();
1810 }
1811
1812 /**
1813  * Top function to save the new value of an element of the Settings struct
1814  * @param index offset in the SettingDesc array of the Settings struct which
1815  * identifies the setting member we want to change
1816  * @param value new value of the setting
1817  * @param force_newgame force the newgame settings
1818  */
1819 bool SetSettingValue(uint index, int32 value, bool force_newgame)
1820 {
1821         const SettingDesc *sd = &_settings[index];
1822         /* If an item is company-based, we do not send it over the network
1823          * (if any) to change. Also *hack*hack* we update the _newgame version
1824          * of settings because changing a company-based setting in a game also
1825          * changes its defaults. At least that is the convention we have chosen */
1826         if (sd->save.flags & SLF_NO_NETWORK_SYNC) {
1827                 void *var = GetVariableAddress(&sd->save, &GetGameSettings());
1828                 Write_ValidateSetting(var, sd, value);
1829
1830                 if (_game_mode != GM_MENU) {
1831                         void *var2 = GetVariableAddress(&sd->save, &_settings_newgame);
1832                         Write_ValidateSetting(var2, sd, value);
1833                 }
1834                 if (sd->desc.proc != NULL) sd->desc.proc((int32)ReadValue(var, sd->save.conv));
1835
1836                 SetWindowClassesDirty(WC_GAME_OPTIONS);
1837
1838                 return true;
1839         }
1840
1841         if (force_newgame) {
1842                 void *var2 = GetVariableAddress(&sd->save, &_settings_newgame);
1843                 Write_ValidateSetting(var2, sd, value);
1844                 return true;
1845         }
1846
1847         /* send non-company-based settings over the network */
1848         if (!_networking || (_networking && _network_server)) {
1849                 return DoCommandP(0, index, value, CMD_CHANGE_SETTING);
1850         }
1851         return false;
1852 }
1853
1854 /**
1855  * Top function to save the new value of an element of the Settings struct
1856  * @param index offset in the SettingDesc array of the CompanySettings struct
1857  * which identifies the setting member we want to change
1858  * @param value new value of the setting
1859  */
1860 void SetCompanySetting(uint index, int32 value)
1861 {
1862         const SettingDesc *sd = &_company_settings[index];
1863         if (Company::IsValidID(_local_company) && _game_mode != GM_MENU) {
1864                 DoCommandP(0, index, value, CMD_CHANGE_COMPANY_SETTING);
1865         } else {
1866                 void *var = GetVariableAddress(&sd->save, &_settings_client.company);
1867                 Write_ValidateSetting(var, sd, value);
1868                 if (sd->desc.proc != NULL) sd->desc.proc((int32)ReadValue(var, sd->save.conv));
1869         }
1870 }
1871
1872 /**
1873  * Set the company settings for a new company to their default values.
1874  */
1875 void SetDefaultCompanySettings(CompanyID cid)
1876 {
1877         Company *c = Company::Get(cid);
1878         const SettingDesc *sd;
1879         for (sd = _company_settings; sd->save.type != SL_END; sd++) {
1880                 void *var = GetVariableAddress(&sd->save, &c->settings);
1881                 Write_ValidateSetting(var, sd, (int32)(size_t)sd->desc.def);
1882         }
1883 }
1884
1885 #if defined(ENABLE_NETWORK)
1886 /**
1887  * Sync all company settings in a multiplayer game.
1888  */
1889 void SyncCompanySettings()
1890 {
1891         const SettingDesc *sd;
1892         uint i = 0;
1893         for (sd = _company_settings; sd->save.type != SL_END; sd++, i++) {
1894                 const void *old_var = GetVariableAddress(&sd->save, &Company::Get(_current_company)->settings);
1895                 const void *new_var = GetVariableAddress(&sd->save, &_settings_client.company);
1896                 uint32 old_value = (uint32)ReadValue(old_var, sd->save.conv);
1897                 uint32 new_value = (uint32)ReadValue(new_var, sd->save.conv);
1898                 if (old_value != new_value) NetworkSendCommand(0, i, new_value, CMD_CHANGE_COMPANY_SETTING, NULL, NULL, _local_company);
1899         }
1900 }
1901 #endif /* ENABLE_NETWORK */
1902
1903 /**
1904  * Get the index in the _company_settings array of a setting
1905  * @param name The name of the setting
1906  * @return The index in the _company_settings array
1907  */
1908 uint GetCompanySettingIndex(const char *name)
1909 {
1910         uint i;
1911         const SettingDesc *sd = GetSettingFromName(name, &i);
1912         assert(sd != NULL && (sd->desc.flags & SGF_PER_COMPANY) != 0);
1913         return i;
1914 }
1915
1916 /**
1917  * Set a setting value with a string.
1918  * @param index the settings index.
1919  * @param value the value to write
1920  * @param force_newgame force the newgame settings
1921  * @note Strings WILL NOT be synced over the network
1922  */
1923 bool SetSettingValue(uint index, const char *value, bool force_newgame)
1924 {
1925         const SettingDesc *sd = &_settings[index];
1926         assert(sd->save.flags & SLF_NO_NETWORK_SYNC);
1927
1928         if ((sd->save.type == SL_STR) && (sd->save.conv & SLS_POINTER)) {
1929                 char **var = (char**)GetVariableAddress(&sd->save, (_game_mode == GM_MENU || force_newgame) ? &_settings_newgame : &_settings_game);
1930                 free(*var);
1931                 *var = strcmp(value, "(null)") == 0 ? NULL : strdup(value);
1932         } else {
1933                 char *var = (char*)GetVariableAddress(&sd->save);
1934                 ttd_strlcpy(var, value, sd->save.length);
1935         }
1936         if (sd->desc.proc != NULL) sd->desc.proc(0);
1937
1938         return true;
1939 }
1940
1941 /**
1942  * Given a name of setting, return a setting description of it.
1943  * @param name  Name of the setting to return a setting description of
1944  * @param i     Pointer to an integer that will contain the index of the setting after the call, if it is successful.
1945  * @return Pointer to the setting description of setting \a name if it can be found,
1946  *         \c NULL indicates failure to obtain the description
1947  */
1948 const SettingDesc *GetSettingFromName(const char *name, uint *i)
1949 {
1950         const SettingDesc *sd;
1951
1952         /* First check all full names */
1953         for (*i = 0, sd = _settings; sd->save.type != SL_END; sd++, (*i)++) {
1954                 if (!SlIsObjectCurrentlyValid(&sd->save)) continue;
1955                 if (strcmp(sd->desc.name, name) == 0) return sd;
1956         }
1957
1958         /* Then check the shortcut variant of the name. */
1959         for (*i = 0, sd = _settings; sd->save.type != SL_END; sd++, (*i)++) {
1960                 if (!SlIsObjectCurrentlyValid(&sd->save)) continue;
1961                 const char *short_name = strchr(sd->desc.name, '.');
1962                 if (short_name != NULL) {
1963                         short_name++;
1964                         if (strcmp(short_name, name) == 0) return sd;
1965                 }
1966         }
1967
1968         if (strncmp(name, "company.", 8) == 0) name += 8;
1969         /* And finally the company-based settings */
1970         for (*i = 0, sd = _company_settings; sd->save.type != SL_END; sd++, (*i)++) {
1971                 if (!SlIsObjectCurrentlyValid(&sd->save)) continue;
1972                 if (strcmp(sd->desc.name, name) == 0) return sd;
1973         }
1974
1975         return NULL;
1976 }
1977
1978 /* Those 2 functions need to be here, else we have to make some stuff non-static
1979  * and besides, it is also better to keep stuff like this at the same place */
1980 void IConsoleSetSetting(const char *name, const char *value, bool force_newgame)
1981 {
1982         uint index;
1983         const SettingDesc *sd = GetSettingFromName(name, &index);
1984
1985         if (sd == NULL) {
1986                 IConsolePrintF(CC_WARNING, "'%s' is an unknown setting.", name);
1987                 return;
1988         }
1989
1990         bool success;
1991         if (sd->desc.cmd == SDT_STRING) {
1992                 success = SetSettingValue(index, value, force_newgame);
1993         } else {
1994                 uint32 val;
1995                 extern bool GetArgumentInteger(uint32 *value, const char *arg);
1996                 success = GetArgumentInteger(&val, value);
1997                 if (!success) {
1998                         IConsolePrintF(CC_ERROR, "'%s' is not an integer.", value);
1999                         return;
2000                 }
2001
2002                 success = SetSettingValue(index, val, force_newgame);
2003         }
2004
2005         if (!success) {
2006                 if (_network_server) {
2007                         IConsoleError("This command/variable is not available during network games.");
2008                 } else {
2009                         IConsoleError("This command/variable is only available to a network server.");
2010                 }
2011         }
2012 }
2013
2014 void IConsoleSetSetting(const char *name, int value)
2015 {
2016         uint index;
2017         const SettingDesc *sd = GetSettingFromName(name, &index);
2018         assert(sd != NULL);
2019         SetSettingValue(index, value);
2020 }
2021
2022 /**
2023  * Output value of a specific setting to the console
2024  * @param name  Name of the setting to output its value
2025  * @param force_newgame force the newgame settings
2026  */
2027 void IConsoleGetSetting(const char *name, bool force_newgame)
2028 {
2029         char value[20];
2030         uint index;
2031         const SettingDesc *sd = GetSettingFromName(name, &index);
2032         const void *ptr;
2033
2034         if (sd == NULL) {
2035                 IConsolePrintF(CC_WARNING, "'%s' is an unknown setting.", name);
2036                 return;
2037         }
2038
2039         ptr = GetVariableAddress(&sd->save, (_game_mode == GM_MENU || force_newgame) ? &_settings_newgame : &_settings_game);
2040
2041         if (sd->desc.cmd == SDT_STRING) {
2042                 IConsolePrintF(CC_WARNING, "Current value for '%s' is: '%s'", name, (sd->save.conv & SLS_POINTER) ? *(const char * const *)ptr : (const char *)ptr);
2043         } else {
2044                 if (sd->desc.cmd == SDT_BOOLX) {
2045                         snprintf(value, sizeof(value), (*(const bool*)ptr != 0) ? "on" : "off");
2046                 } else {
2047                         snprintf(value, sizeof(value), sd->desc.min < 0 ? "%d" : "%u", (int32)ReadValue(ptr, sd->save.conv));
2048                 }
2049
2050                 IConsolePrintF(CC_WARNING, "Current value for '%s' is: '%s' (min: %s%d, max: %u)",
2051                         name, value, (sd->desc.flags & SGF_0ISDISABLED) ? "(0) " : "", sd->desc.min, sd->desc.max);
2052         }
2053 }
2054
2055 /**
2056  * List all settings and their value to the console
2057  *
2058  * @param prefilter  If not \c NULL, only list settings with names that begin with \a prefilter prefix
2059  */
2060 void IConsoleListSettings(const char *prefilter)
2061 {
2062         IConsolePrintF(CC_WARNING, "All settings with their current value:");
2063
2064         for (const SettingDesc *sd = _settings; sd->save.type != SL_END; sd++) {
2065                 if (!SlIsObjectCurrentlyValid(&sd->save)) continue;
2066                 if (prefilter != NULL && strstr(sd->desc.name, prefilter) == NULL) continue;
2067                 char value[80];
2068                 const void *ptr = GetVariableAddress(&sd->save, &GetGameSettings());
2069
2070                 if (sd->desc.cmd == SDT_BOOLX) {
2071                         snprintf(value, lengthof(value), (*(const bool *)ptr != 0) ? "on" : "off");
2072                 } else if (sd->desc.cmd == SDT_STRING) {
2073                         snprintf(value, sizeof(value), "%s", (sd->save.conv & SLS_POINTER) ? *(const char * const *)ptr : (const char *)ptr);
2074                 } else {
2075                         snprintf(value, lengthof(value), sd->desc.min < 0 ? "%d" : "%u", (int32)ReadValue(ptr, sd->save.conv));
2076                 }
2077                 IConsolePrintF(CC_DEFAULT, "%s = %s", sd->desc.name, value);
2078         }
2079
2080         IConsolePrintF(CC_WARNING, "Use 'setting' command to change a value");
2081 }
2082
2083 /**
2084  * Save and load handler for settings
2085  * @param osd SettingDesc struct containing all information
2086  * @param object can be either NULL in which case we load global variables or
2087  * a pointer to a struct which is getting saved
2088  */
2089 static void LoadSettings(LoadBuffer *reader, const SettingDesc *osd, void *object)
2090 {
2091         for (; osd->save.type != SL_END; osd++) {
2092                 const SaveLoad *sld = &osd->save;
2093                 if (!reader->ReadObjectMember(object, sld)) continue;
2094
2095                 void *ptr = GetVariableAddress(sld, object);
2096                 if ((sld->type == SL_VAR) && IsNumericType(sld->conv)) Write_ValidateSetting(ptr, osd, ReadValue(ptr, sld->conv));
2097         }
2098 }
2099
2100 /**
2101  * Save and load handler for settings
2102  * @param sd SettingDesc struct containing all information
2103  * @param object can be either NULL in which case we load global variables or
2104  * a pointer to a struct which is getting saved
2105  */
2106 static void SaveSettings(SaveDumper *dumper, const SettingDesc *sd, void *object)
2107 {
2108         SaveDumper temp(1024);
2109
2110         for (const SettingDesc *i = sd; i->save.type != SL_END; i++) {
2111                 temp.WriteObjectMember(object, &i->save);
2112         }
2113
2114         dumper->WriteRIFFSize(temp.GetSize());
2115         temp.Dump(dumper);
2116 }
2117
2118 static void Load_OPTS(LoadBuffer *reader)
2119 {
2120         /* Copy over default setting since some might not get loaded in
2121          * a networking environment. This ensures for example that the local
2122          * autosave-frequency stays when joining a network-server */
2123         PrepareOldDiffCustom();
2124         LoadSettings(reader, _gameopt_settings, &_settings_game);
2125         HandleOldDiffCustom(reader->stv);
2126 }
2127
2128 static void Load_PATS(LoadBuffer *reader)
2129 {
2130         /* Copy over default setting since some might not get loaded in
2131          * a networking environment. This ensures for example that the local
2132          * currency setting stays when joining a network-server */
2133         LoadSettings(reader, _settings, &_settings_game);
2134 }
2135
2136 static void Check_PATS(LoadBuffer *reader)
2137 {
2138         LoadSettings(reader, _settings, &_load_check_data.settings);
2139 }
2140
2141 static void Save_PATS(SaveDumper *dumper)
2142 {
2143         SaveSettings(dumper, _settings, &_settings_game);
2144 }
2145
2146 void CheckConfig()
2147 {
2148         /*
2149          * Increase old default values for pf_maxdepth and pf_maxlength
2150          * to support big networks.
2151          */
2152         if (_settings_newgame.pf.opf.pf_maxdepth == 16 && _settings_newgame.pf.opf.pf_maxlength == 512) {
2153                 _settings_newgame.pf.opf.pf_maxdepth = 48;
2154                 _settings_newgame.pf.opf.pf_maxlength = 4096;
2155         }
2156 }
2157
2158 extern const ChunkHandler _setting_chunk_handlers[] = {
2159         { 'OPTS', NULL,      Load_OPTS, NULL, NULL,       CH_RIFF},
2160         { 'PATS', Save_PATS, Load_PATS, NULL, Check_PATS, CH_RIFF | CH_LAST},
2161 };
2162
2163 static bool IsSignedVarMemType(VarType vt)
2164 {
2165         switch (GetVarMemType(vt)) {
2166                 case SLE_VAR_I8:
2167                 case SLE_VAR_I16:
2168                 case SLE_VAR_I32:
2169                 case SLE_VAR_I64:
2170                         return true;
2171         }
2172         return false;
2173 }