src/settings.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "settings.h"
  21 #include "irrlichttypes_bloated.h"
  22 #include "exceptions.h"
  23 #include "threading/mutex_auto_lock.h"
  24 #include "util/strfnd.h"
  25 #include <iostream>
  26 #include <fstream>
  27 #include <sstream>
  28 #include "debug.h"
  29 #include "log.h"
  30 #include "util/serialize.h"
  31 #include "filesys.h"
  32 #include "noise.h"
  33 #include <cctype>
  34 #include <algorithm>
  35
  36 Settings *g_settings = nullptr;
  37 static SettingsHierarchy g_hierarchy;
  38 std::string g_settings_path;
  39
  40 std::unordered_map<std::string, const FlagDesc *> Settings::s_flags;
  41
  42 /* Settings hierarchy implementation */
  43
  44 SettingsHierarchy::SettingsHierarchy(Settings *fallback)
  45 {
  46         layers.push_back(fallback);
  47 }
  48
  49
  50 Settings *SettingsHierarchy::getLayer(int layer) const
  51 {
  52         if (layer < 0 || layer >= (int)layers.size())
  53                 throw BaseException("Invalid settings layer");
  54         return layers[layer];
  55 }
  56
  57
  58 Settings *SettingsHierarchy::getParent(int layer) const
  59 {
  60         assert(layer >= 0 && layer < (int)layers.size());
  61         // iterate towards the origin (0) to find the next fallback layer
  62         for (int i = layer - 1; i >= 0; --i) {
  63                 if (layers[i])
  64                         return layers[i];
  65         }
  66
  67         return nullptr;
  68 }
  69
  70
  71 void SettingsHierarchy::onLayerCreated(int layer, Settings *obj)
  72 {
  73         if (layer < 0)
  74                 throw BaseException("Invalid settings layer");
  75         if ((int)layers.size() < layer + 1)
  76                 layers.resize(layer + 1);
  77
  78         Settings *&pos = layers[layer];
  79         if (pos)
  80                 throw BaseException("Setting layer " + itos(layer) + " already exists");
  81
  82         pos = obj;
  83         // This feels bad
  84         if (this == &g_hierarchy && layer == (int)SL_GLOBAL)
  85                 g_settings = obj;
  86 }
  87
  88
  89 void SettingsHierarchy::onLayerRemoved(int layer)
  90 {
  91         assert(layer >= 0 && layer < (int)layers.size());
  92         layers[layer] = nullptr;
  93         if (this == &g_hierarchy && layer == (int)SL_GLOBAL)
  94                 g_settings = nullptr;
  95 }
  96
  97 /* Settings implementation */
  98
  99 Settings *Settings::createLayer(SettingsLayer sl, const std::string &end_tag)
 100 {
 101         return new Settings(end_tag, &g_hierarchy, (int)sl);
 102 }
 103
 104
 105 Settings *Settings::getLayer(SettingsLayer sl)
 106 {
 107         return g_hierarchy.getLayer(sl);
 108 }
 109
 110
 111 Settings::Settings(const std::string &end_tag, SettingsHierarchy *h,
 112                 int settings_layer) :
 113         m_end_tag(end_tag),
 114         m_hierarchy(h),
 115         m_settingslayer(settings_layer)
 116 {
 117         if (m_hierarchy)
 118                 m_hierarchy->onLayerCreated(m_settingslayer, this);
 119 }
 120
 121
 122 Settings::~Settings()
 123 {
 124         MutexAutoLock lock(m_mutex);
 125
 126         if (m_hierarchy)
 127                 m_hierarchy->onLayerRemoved(m_settingslayer);
 128
 129         clearNoLock();
 130 }
 131
 132
 133 Settings & Settings::operator = (const Settings &other)
 134 {
 135         if (&other == this)
 136                 return *this;
 137
 138         // TODO: Avoid copying Settings objects. Make this private.
 139         FATAL_ERROR_IF(m_hierarchy || other.m_hierarchy,
 140                 "Cannot copy or overwrite Settings object that belongs to a hierarchy");
 141
 142         MutexAutoLock lock(m_mutex);
 143         MutexAutoLock lock2(other.m_mutex);
 144
 145         clearNoLock();
 146         m_settings = other.m_settings;
 147         m_callbacks = other.m_callbacks;
 148
 149         return *this;
 150 }
 151
 152
 153 bool Settings::checkNameValid(const std::string &name)
 154 {
 155         bool valid = name.find_first_of("=\"{}#") == std::string::npos;
 156         if (valid)
 157                 valid = std::find_if(name.begin(), name.end(), ::isspace) == name.end();
 158
 159         if (!valid) {
 160                 errorstream << "Invalid setting name \"" << name << "\""
 161                         << std::endl;
 162                 return false;
 163         }
 164         return true;
 165 }
 166
 167
 168 bool Settings::checkValueValid(const std::string &value)
 169 {
 170         if (value.substr(0, 3) == "\"\"\"" ||
 171                 value.find("\n\"\"\"") != std::string::npos) {
 172                 errorstream << "Invalid character sequence '\"\"\"' found in"
 173                         " setting value!" << std::endl;
 174                 return false;
 175         }
 176         return true;
 177 }
 178
 179 std::string Settings::getMultiline(std::istream &is, size_t *num_lines)
 180 {
 181         size_t lines = 1;
 182         std::string value;
 183         std::string line;
 184
 185         while (is.good()) {
 186                 lines++;
 187                 std::getline(is, line);
 188                 if (line == "\"\"\"")
 189                         break;
 190                 value += line;
 191                 value.push_back('\n');
 192         }
 193
 194         size_t len = value.size();
 195         if (len)
 196                 value.erase(len - 1);
 197
 198         if (num_lines)
 199                 *num_lines = lines;
 200
 201         return value;
 202 }
 203
 204
 205 bool Settings::readConfigFile(const char *filename)
 206 {
 207         std::ifstream is(filename);
 208         if (!is.good())
 209                 return false;
 210
 211         return parseConfigLines(is);
 212 }
 213
 214
 215 bool Settings::parseConfigLines(std::istream &is)
 216 {
 217         MutexAutoLock lock(m_mutex);
 218
 219         std::string line, name, value;
 220
 221         while (is.good()) {
 222                 std::getline(is, line);
 223                 SettingsParseEvent event = parseConfigObject(line, name, value);
 224
 225                 switch (event) {
 226                 case SPE_NONE:
 227                 case SPE_INVALID:
 228                 case SPE_COMMENT:
 229                         break;
 230                 case SPE_KVPAIR:
 231                         m_settings[name] = SettingsEntry(value);
 232                         break;
 233                 case SPE_END:
 234                         return true;
 235                 case SPE_GROUP: {
 236                         Settings *group = new Settings("}");
 237                         if (!group->parseConfigLines(is)) {
 238                                 delete group;
 239                                 return false;
 240                         }
 241                         m_settings[name] = SettingsEntry(group);
 242                         break;
 243                 }
 244                 case SPE_MULTILINE:
 245                         m_settings[name] = SettingsEntry(getMultiline(is));
 246                         break;
 247                 }
 248         }
 249
 250         // false (failure) if end tag not found
 251         return m_end_tag.empty();
 252 }
 253
 254
 255 void Settings::writeLines(std::ostream &os, u32 tab_depth) const
 256 {
 257         MutexAutoLock lock(m_mutex);
 258
 259         for (const auto &setting_it : m_settings)
 260                 printEntry(os, setting_it.first, setting_it.second, tab_depth);
 261
 262         // For groups this must be "}" !
 263         if (!m_end_tag.empty()) {
 264                 for (u32 i = 0; i < tab_depth; i++)
 265                         os << "\t";
 266
 267                 os << m_end_tag << "\n";
 268         }
 269 }
 270
 271
 272 void Settings::printEntry(std::ostream &os, const std::string &name,
 273         const SettingsEntry &entry, u32 tab_depth)
 274 {
 275         for (u32 i = 0; i != tab_depth; i++)
 276                 os << "\t";
 277
 278         if (entry.is_group) {
 279                 os << name << " = {\n";
 280
 281                 entry.group->writeLines(os, tab_depth + 1);
 282
 283                 // Closing bracket handled by writeLines
 284         } else {
 285                 os << name << " = ";
 286
 287                 if (entry.value.find('\n') != std::string::npos)
 288                         os << "\"\"\"\n" << entry.value << "\n\"\"\"\n";
 289                 else
 290                         os << entry.value << "\n";
 291         }
 292 }
 293
 294
 295 bool Settings::updateConfigObject(std::istream &is, std::ostream &os, u32 tab_depth)
 296 {
 297         SettingEntries::const_iterator it;
 298         std::set<std::string> present_entries;
 299         std::string line, name, value;
 300         bool was_modified = false;
 301         bool end_found = false;
 302
 303         // Add any settings that exist in the config file with the current value
 304         // in the object if existing
 305         while (is.good() && !end_found) {
 306                 std::getline(is, line);
 307                 SettingsParseEvent event = parseConfigObject(line, name, value);
 308
 309                 switch (event) {
 310                 case SPE_END:
 311                         // Skip end tag. Append later.
 312                         end_found = true;
 313                         break;
 314                 case SPE_MULTILINE:
 315                         value = getMultiline(is);
 316                         /* FALLTHROUGH */
 317                 case SPE_KVPAIR:
 318                         it = m_settings.find(name);
 319                         if (it != m_settings.end() &&
 320                                         (it->second.is_group || it->second.value != value)) {
 321                                 printEntry(os, name, it->second, tab_depth);
 322                                 was_modified = true;
 323                         } else if (it == m_settings.end()) {
 324                                 // Remove by skipping
 325                                 was_modified = true;
 326                                 break;
 327                         } else {
 328                                 os << line << "\n";
 329                                 if (event == SPE_MULTILINE)
 330                                         os << value << "\n\"\"\"\n";
 331                         }
 332                         present_entries.insert(name);
 333                         break;
 334                 case SPE_GROUP:
 335                         it = m_settings.find(name);
 336                         if (it != m_settings.end() && it->second.is_group) {
 337                                 os << line << "\n";
 338                                 sanity_check(it->second.group != NULL);
 339                                 was_modified |= it->second.group->updateConfigObject(is, os, tab_depth + 1);
 340                         } else if (it == m_settings.end()) {
 341                                 // Remove by skipping
 342                                 was_modified = true;
 343                                 Settings removed_group("}"); // Move 'is' to group end
 344                                 std::stringstream ss;
 345                                 removed_group.updateConfigObject(is, ss, tab_depth + 1);
 346                                 break;
 347                         } else {
 348                                 printEntry(os, name, it->second, tab_depth);
 349                                 was_modified = true;
 350                         }
 351                         present_entries.insert(name);
 352                         break;
 353                 default:
 354                         os << line << (is.eof() ? "" : "\n");
 355                         break;
 356                 }
 357         }
 358
 359         if (!line.empty() && is.eof())
 360                 os << "\n";
 361
 362         // Add any settings in the object that don't exist in the config file yet
 363         for (it = m_settings.begin(); it != m_settings.end(); ++it) {
 364                 if (present_entries.find(it->first) != present_entries.end())
 365                         continue;
 366
 367                 printEntry(os, it->first, it->second, tab_depth);
 368                 was_modified = true;
 369         }
 370
 371         // Append ending tag
 372         if (!m_end_tag.empty()) {
 373                 os << m_end_tag << "\n";
 374                 was_modified |= !end_found;
 375         }
 376
 377         return was_modified;
 378 }
 379
 380
 381 bool Settings::updateConfigFile(const char *filename)
 382 {
 383         MutexAutoLock lock(m_mutex);
 384
 385         std::ifstream is(filename);
 386         std::ostringstream os(std::ios_base::binary);
 387
 388         bool was_modified = updateConfigObject(is, os);
 389         is.close();
 390
 391         if (!was_modified)
 392                 return true;
 393
 394         if (!fs::safeWriteToFile(filename, os.str())) {
 395                 errorstream << "Error writing configuration file: \""
 396                         << filename << "\"" << std::endl;
 397                 return false;
 398         }
 399
 400         return true;
 401 }
 402
 403
 404 bool Settings::parseCommandLine(int argc, char *argv[],
 405                 std::map<std::string, ValueSpec> &allowed_options)
 406 {
 407         int nonopt_index = 0;
 408         for (int i = 1; i < argc; i++) {
 409                 std::string arg_name = argv[i];
 410                 if (arg_name.substr(0, 2) != "--") {
 411                         // If option doesn't start with -, read it in as nonoptX
 412                         if (arg_name[0] != '-'){
 413                                 std::string name = "nonopt";
 414                                 name += itos(nonopt_index);
 415                                 set(name, arg_name);
 416                                 nonopt_index++;
 417                                 continue;
 418                         }
 419                         errorstream << "Invalid command-line parameter \""
 420                                         << arg_name << "\": --<option> expected." << std::endl;
 421                         return false;
 422                 }
 423
 424                 std::string name = arg_name.substr(2);
 425
 426                 std::map<std::string, ValueSpec>::iterator n;
 427                 n = allowed_options.find(name);
 428                 if (n == allowed_options.end()) {
 429                         errorstream << "Unknown command-line parameter \""
 430                                         << arg_name << "\"" << std::endl;
 431                         return false;
 432                 }
 433
 434                 ValueType type = n->second.type;
 435
 436                 std::string value;
 437
 438                 if (type == VALUETYPE_FLAG) {
 439                         value = "true";
 440                 } else {
 441                         if ((i + 1) >= argc) {
 442                                 errorstream << "Invalid command-line parameter \""
 443                                                 << name << "\": missing value" << std::endl;
 444                                 return false;
 445                         }
 446                         value = argv[++i];
 447                 }
 448
 449                 set(name, value);
 450         }
 451
 452         return true;
 453 }
 454
 455
 456
 457 /***********
 458  * Getters *
 459  ***********/
 460
 461 Settings *Settings::getParent() const
 462 {
 463         return m_hierarchy ? m_hierarchy->getParent(m_settingslayer) : nullptr;
 464 }
 465
 466
 467 const SettingsEntry &Settings::getEntry(const std::string &name) const
 468 {
 469         {
 470                 MutexAutoLock lock(m_mutex);
 471
 472                 SettingEntries::const_iterator n;
 473                 if ((n = m_settings.find(name)) != m_settings.end())
 474                         return n->second;
 475         }
 476
 477         if (auto parent = getParent())
 478                 return parent->getEntry(name);
 479
 480         throw SettingNotFoundException("Setting [" + name + "] not found.");
 481 }
 482
 483
 484 Settings *Settings::getGroup(const std::string &name) const
 485 {
 486         const SettingsEntry &entry = getEntry(name);
 487         if (!entry.is_group)
 488                 throw SettingNotFoundException("Setting [" + name + "] is not a group.");
 489         return entry.group;
 490 }
 491
 492
 493 const std::string &Settings::get(const std::string &name) const
 494 {
 495         const SettingsEntry &entry = getEntry(name);
 496         if (entry.is_group)
 497                 throw SettingNotFoundException("Setting [" + name + "] is a group.");
 498         return entry.value;
 499 }
 500
 501
 502 bool Settings::getBool(const std::string &name) const
 503 {
 504         return is_yes(get(name));
 505 }
 506
 507
 508 u16 Settings::getU16(const std::string &name) const
 509 {
 510         return stoi(get(name), 0, 65535);
 511 }
 512
 513
 514 s16 Settings::getS16(const std::string &name) const
 515 {
 516         return stoi(get(name), -32768, 32767);
 517 }
 518
 519
 520 u32 Settings::getU32(const std::string &name) const
 521 {
 522         return (u32) stoi(get(name));
 523 }
 524
 525 s32 Settings::getS32(const std::string &name) const
 526 {
 527         return stoi(get(name));
 528 }
 529
 530
 531 float Settings::getFloat(const std::string &name) const
 532 {
 533         return stof(get(name));
 534 }
 535
 536
 537 u64 Settings::getU64(const std::string &name) const
 538 {
 539         std::string s = get(name);
 540         return from_string<u64>(s);
 541 }
 542
 543
 544 v2f Settings::getV2F(const std::string &name) const
 545 {
 546         v2f value;
 547         Strfnd f(get(name));
 548         f.next("(");
 549         value.X = stof(f.next(","));
 550         value.Y = stof(f.next(")"));
 551         return value;
 552 }
 553
 554
 555 v3f Settings::getV3F(const std::string &name) const
 556 {
 557         v3f value;
 558         Strfnd f(get(name));
 559         f.next("(");
 560         value.X = stof(f.next(","));
 561         value.Y = stof(f.next(","));
 562         value.Z = stof(f.next(")"));
 563         return value;
 564 }
 565
 566
 567 u32 Settings::getFlagStr(const std::string &name, const FlagDesc *flagdesc,
 568         u32 *flagmask) const
 569 {
 570         u32 flags = 0;
 571
 572         // Read default value (if there is any)
 573         if (auto parent = getParent())
 574                 flags = parent->getFlagStr(name, flagdesc, flagmask);
 575
 576         // Apply custom flags "on top"
 577         if (m_settings.find(name) != m_settings.end()) {
 578                 std::string value = get(name);
 579                 u32 flags_user;
 580                 u32 mask_user = U32_MAX;
 581                 flags_user = std::isdigit(value[0])
 582                         ? stoi(value) // Override default
 583                         : readFlagString(value, flagdesc, &mask_user);
 584
 585                 flags &= ~mask_user;
 586                 flags |=  flags_user;
 587                 if (flagmask)
 588                         *flagmask |= mask_user;
 589         }
 590
 591         return flags;
 592 }
 593
 594
 595 bool Settings::getNoiseParams(const std::string &name, NoiseParams &np) const
 596 {
 597         if (getNoiseParamsFromGroup(name, np) || getNoiseParamsFromValue(name, np))
 598                 return true;
 599         if (auto parent = getParent())
 600                 return parent->getNoiseParams(name, np);
 601
 602         return false;
 603 }
 604
 605
 606 bool Settings::getNoiseParamsFromValue(const std::string &name,
 607         NoiseParams &np) const
 608 {
 609         std::string value;
 610
 611         if (!getNoEx(name, value))
 612                 return false;
 613
 614         // Format: f32,f32,(f32,f32,f32),s32,s32,f32[,f32]
 615         Strfnd f(value);
 616
 617         np.offset   = stof(f.next(","));
 618         np.scale    = stof(f.next(","));
 619         f.next("(");
 620         np.spread.X = stof(f.next(","));
 621         np.spread.Y = stof(f.next(","));
 622         np.spread.Z = stof(f.next(")"));
 623         f.next(",");
 624         np.seed     = stoi(f.next(","));
 625         np.octaves  = stoi(f.next(","));
 626         np.persist  = stof(f.next(","));
 627
 628         std::string optional_params = f.next("");
 629         if (!optional_params.empty())
 630                 np.lacunarity = stof(optional_params);
 631
 632         return true;
 633 }
 634
 635
 636 bool Settings::getNoiseParamsFromGroup(const std::string &name,
 637         NoiseParams &np) const
 638 {
 639         Settings *group = NULL;
 640
 641         if (!getGroupNoEx(name, group))
 642                 return false;
 643
 644         group->getFloatNoEx("offset",      np.offset);
 645         group->getFloatNoEx("scale",       np.scale);
 646         group->getV3FNoEx("spread",        np.spread);
 647         group->getS32NoEx("seed",          np.seed);
 648         group->getU16NoEx("octaves",       np.octaves);
 649         group->getFloatNoEx("persistence", np.persist);
 650         group->getFloatNoEx("lacunarity",  np.lacunarity);
 651
 652         np.flags = 0;
 653         if (!group->getFlagStrNoEx("flags", np.flags, flagdesc_noiseparams))
 654                 np.flags = NOISE_FLAG_DEFAULTS;
 655
 656         return true;
 657 }
 658
 659
 660 bool Settings::exists(const std::string &name) const
 661 {
 662         MutexAutoLock lock(m_mutex);
 663
 664         if (m_settings.find(name) != m_settings.end())
 665                 return true;
 666         if (auto parent = getParent())
 667                 return parent->exists(name);
 668         return false;
 669 }
 670
 671
 672 std::vector<std::string> Settings::getNames() const
 673 {
 674         MutexAutoLock lock(m_mutex);
 675
 676         std::vector<std::string> names;
 677         names.reserve(m_settings.size());
 678         for (const auto &settings_it : m_settings) {
 679                 names.push_back(settings_it.first);
 680         }
 681         return names;
 682 }
 683
 684
 685
 686 /***************************************
 687  * Getters that don't throw exceptions *
 688  ***************************************/
 689
 690 bool Settings::getGroupNoEx(const std::string &name, Settings *&val) const
 691 {
 692         try {
 693                 val = getGroup(name);
 694                 return true;
 695         } catch (SettingNotFoundException &e) {
 696                 return false;
 697         }
 698 }
 699
 700
 701 bool Settings::getNoEx(const std::string &name, std::string &val) const
 702 {
 703         try {
 704                 val = get(name);
 705                 return true;
 706         } catch (SettingNotFoundException &e) {
 707                 return false;
 708         }
 709 }
 710
 711
 712 bool Settings::getFlag(const std::string &name) const
 713 {
 714         try {
 715                 return getBool(name);
 716         } catch(SettingNotFoundException &e) {
 717                 return false;
 718         }
 719 }
 720
 721
 722 bool Settings::getFloatNoEx(const std::string &name, float &val) const
 723 {
 724         try {
 725                 val = getFloat(name);
 726                 return true;
 727         } catch (SettingNotFoundException &e) {
 728                 return false;
 729         }
 730 }
 731
 732
 733 bool Settings::getU16NoEx(const std::string &name, u16 &val) const
 734 {
 735         try {
 736                 val = getU16(name);
 737                 return true;
 738         } catch (SettingNotFoundException &e) {
 739                 return false;
 740         }
 741 }
 742
 743
 744 bool Settings::getS16NoEx(const std::string &name, s16 &val) const
 745 {
 746         try {
 747                 val = getS16(name);
 748                 return true;
 749         } catch (SettingNotFoundException &e) {
 750                 return false;
 751         }
 752 }
 753
 754 bool Settings::getU32NoEx(const std::string &name, u32 &val) const
 755 {
 756         try {
 757                 val = getU32(name);
 758                 return true;
 759         } catch (SettingNotFoundException &e) {
 760                 return false;
 761         }
 762 }
 763
 764 bool Settings::getS32NoEx(const std::string &name, s32 &val) const
 765 {
 766         try {
 767                 val = getS32(name);
 768                 return true;
 769         } catch (SettingNotFoundException &e) {
 770                 return false;
 771         }
 772 }
 773
 774
 775 bool Settings::getU64NoEx(const std::string &name, u64 &val) const
 776 {
 777         try {
 778                 val = getU64(name);
 779                 return true;
 780         } catch (SettingNotFoundException &e) {
 781                 return false;
 782         }
 783 }
 784
 785
 786 bool Settings::getV2FNoEx(const std::string &name, v2f &val) const
 787 {
 788         try {
 789                 val = getV2F(name);
 790                 return true;
 791         } catch (SettingNotFoundException &e) {
 792                 return false;
 793         }
 794 }
 795
 796
 797 bool Settings::getV3FNoEx(const std::string &name, v3f &val) const
 798 {
 799         try {
 800                 val = getV3F(name);
 801                 return true;
 802         } catch (SettingNotFoundException &e) {
 803                 return false;
 804         }
 805 }
 806
 807
 808 bool Settings::getFlagStrNoEx(const std::string &name, u32 &val,
 809         const FlagDesc *flagdesc) const
 810 {
 811         if (!flagdesc) {
 812                 if (!(flagdesc = getFlagDescFallback(name)))
 813                         return false; // Not found
 814         }
 815
 816         try {
 817                 val = getFlagStr(name, flagdesc, nullptr);
 818
 819                 return true;
 820         } catch (SettingNotFoundException &e) {
 821                 return false;
 822         }
 823 }
 824
 825
 826 /***********
 827  * Setters *
 828  ***********/
 829
 830 bool Settings::setEntry(const std::string &name, const void *data,
 831         bool set_group)
 832 {
 833         if (!checkNameValid(name))
 834                 return false;
 835         if (!set_group && !checkValueValid(*(const std::string *)data))
 836                 return false;
 837
 838         Settings *old_group = NULL;
 839         {
 840                 MutexAutoLock lock(m_mutex);
 841
 842                 SettingsEntry &entry = m_settings[name];
 843                 old_group = entry.group;
 844
 845                 entry.value    = set_group ? "" : *(const std::string *)data;
 846                 entry.group    = set_group ? *(Settings **)data : NULL;
 847                 entry.is_group = set_group;
 848                 if (set_group)
 849                         entry.group->m_end_tag = "}";
 850         }
 851
 852         delete old_group;
 853
 854         return true;
 855 }
 856
 857
 858 bool Settings::set(const std::string &name, const std::string &value)
 859 {
 860         if (!setEntry(name, &value, false))
 861                 return false;
 862
 863         doCallbacks(name);
 864         return true;
 865 }
 866
 867
 868 // TODO: Remove this function
 869 bool Settings::setDefault(const std::string &name, const std::string &value)
 870 {
 871         FATAL_ERROR_IF(m_hierarchy != &g_hierarchy, "setDefault is only valid on "
 872                 "global settings");
 873         return getLayer(SL_DEFAULTS)->set(name, value);
 874 }
 875
 876
 877 bool Settings::setGroup(const std::string &name, const Settings &group)
 878 {
 879         // Settings must own the group pointer
 880         // avoid double-free by copying the source
 881         Settings *copy = new Settings();
 882         *copy = group;
 883         return setEntry(name, &copy, true);
 884 }
 885
 886
 887 bool Settings::setBool(const std::string &name, bool value)
 888 {
 889         return set(name, value ? "true" : "false");
 890 }
 891
 892
 893 bool Settings::setS16(const std::string &name, s16 value)
 894 {
 895         return set(name, itos(value));
 896 }
 897
 898
 899 bool Settings::setU16(const std::string &name, u16 value)
 900 {
 901         return set(name, itos(value));
 902 }
 903
 904
 905 bool Settings::setS32(const std::string &name, s32 value)
 906 {
 907         return set(name, itos(value));
 908 }
 909
 910
 911 bool Settings::setU64(const std::string &name, u64 value)
 912 {
 913         std::ostringstream os;
 914         os << value;
 915         return set(name, os.str());
 916 }
 917
 918
 919 bool Settings::setFloat(const std::string &name, float value)
 920 {
 921         return set(name, ftos(value));
 922 }
 923
 924
 925 bool Settings::setV2F(const std::string &name, v2f value)
 926 {
 927         std::ostringstream os;
 928         os << "(" << value.X << "," << value.Y << ")";
 929         return set(name, os.str());
 930 }
 931
 932
 933 bool Settings::setV3F(const std::string &name, v3f value)
 934 {
 935         std::ostringstream os;
 936         os << "(" << value.X << "," << value.Y << "," << value.Z << ")";
 937         return set(name, os.str());
 938 }
 939
 940
 941 bool Settings::setFlagStr(const std::string &name, u32 flags,
 942         const FlagDesc *flagdesc, u32 flagmask)
 943 {
 944         if (!flagdesc) {
 945                 if (!(flagdesc = getFlagDescFallback(name)))
 946                         return false; // Not found
 947         }
 948
 949         return set(name, writeFlagString(flags, flagdesc, flagmask));
 950 }
 951
 952
 953 bool Settings::setNoiseParams(const std::string &name, const NoiseParams &np)
 954 {
 955         Settings *group = new Settings;
 956
 957         group->setFloat("offset",      np.offset);
 958         group->setFloat("scale",       np.scale);
 959         group->setV3F("spread",        np.spread);
 960         group->setS32("seed",          np.seed);
 961         group->setU16("octaves",       np.octaves);
 962         group->setFloat("persistence", np.persist);
 963         group->setFloat("lacunarity",  np.lacunarity);
 964         group->setFlagStr("flags",     np.flags, flagdesc_noiseparams, np.flags);
 965
 966         return setEntry(name, &group, true);
 967 }
 968
 969
 970 bool Settings::remove(const std::string &name)
 971 {
 972         // Lock as short as possible, unlock before doCallbacks()
 973         m_mutex.lock();
 974
 975         SettingEntries::iterator it = m_settings.find(name);
 976         if (it != m_settings.end()) {
 977                 delete it->second.group;
 978                 m_settings.erase(it);
 979                 m_mutex.unlock();
 980
 981                 doCallbacks(name);
 982                 return true;
 983         }
 984
 985         m_mutex.unlock();
 986         return false;
 987 }
 988
 989
 990 SettingsParseEvent Settings::parseConfigObject(const std::string &line,
 991         std::string &name, std::string &value)
 992 {
 993         std::string trimmed_line = trim(line);
 994
 995         if (trimmed_line.empty())
 996                 return SPE_NONE;
 997         if (trimmed_line[0] == '#')
 998                 return SPE_COMMENT;
 999         if (trimmed_line == m_end_tag)
1000                 return SPE_END;
1001
1002         size_t pos = trimmed_line.find('=');
1003         if (pos == std::string::npos)
1004                 return SPE_INVALID;
1005
1006         name  = trim(trimmed_line.substr(0, pos));
1007         value = trim(trimmed_line.substr(pos + 1));
1008
1009         if (value == "{")
1010                 return SPE_GROUP;
1011         if (value == "\"\"\"")
1012                 return SPE_MULTILINE;
1013
1014         return SPE_KVPAIR;
1015 }
1016
1017
1018 void Settings::clearNoLock()
1019 {
1020         for (SettingEntries::const_iterator it = m_settings.begin();
1021                         it != m_settings.end(); ++it)
1022                 delete it->second.group;
1023         m_settings.clear();
1024 }
1025
1026
1027 void Settings::setDefault(const std::string &name, const FlagDesc *flagdesc,
1028         u32 flags)
1029 {
1030         s_flags[name] = flagdesc;
1031         setDefault(name, writeFlagString(flags, flagdesc, U32_MAX));
1032 }
1033
1034 const FlagDesc *Settings::getFlagDescFallback(const std::string &name) const
1035 {
1036         auto it = s_flags.find(name);
1037         return it == s_flags.end() ? nullptr : it->second;
1038 }
1039
1040 void Settings::registerChangedCallback(const std::string &name,
1041         SettingsChangedCallback cbf, void *userdata)
1042 {
1043         MutexAutoLock lock(m_callback_mutex);
1044         m_callbacks[name].emplace_back(cbf, userdata);
1045 }
1046
1047 void Settings::deregisterChangedCallback(const std::string &name,
1048         SettingsChangedCallback cbf, void *userdata)
1049 {
1050         MutexAutoLock lock(m_callback_mutex);
1051         SettingsCallbackMap::iterator it_cbks = m_callbacks.find(name);
1052
1053         if (it_cbks != m_callbacks.end()) {
1054                 SettingsCallbackList &cbks = it_cbks->second;
1055
1056                 SettingsCallbackList::iterator position =
1057                         std::find(cbks.begin(), cbks.end(), std::make_pair(cbf, userdata));
1058
1059                 if (position != cbks.end())
1060                         cbks.erase(position);
1061         }
1062 }
1063
1064 void Settings::removeSecureSettings()
1065 {
1066         for (const auto &name : getNames()) {
1067                 if (name.compare(0, 7, "secure.") != 0)
1068                         continue;
1069
1070                 errorstream << "Secure setting " << name
1071                                 << " isn't allowed, so was ignored."
1072                                 << std::endl;
1073                 remove(name);
1074         }
1075 }
1076
1077 void Settings::doCallbacks(const std::string &name) const
1078 {
1079         MutexAutoLock lock(m_callback_mutex);
1080
1081         SettingsCallbackMap::const_iterator it_cbks = m_callbacks.find(name);
1082         if (it_cbks != m_callbacks.end()) {
1083                 SettingsCallbackList::const_iterator it;
1084                 for (it = it_cbks->second.begin(); it != it_cbks->second.end(); ++it)
1085                         (it->first)(name, it->second);
1086         }
1087 }