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 static Settings main_settings;
  37 Settings *g_settings = &main_settings;
  38 std::string g_settings_path;
  39
  40 Settings::~Settings()
  41 {
  42         clear();
  43 }
  44
  45
  46 Settings & Settings::operator += (const Settings &other)
  47 {
  48         update(other);
  49
  50         return *this;
  51 }
  52
  53
  54 Settings & Settings::operator = (const Settings &other)
  55 {
  56         if (&other == this)
  57                 return *this;
  58
  59         MutexAutoLock lock(m_mutex);
  60         MutexAutoLock lock2(other.m_mutex);
  61
  62         clearNoLock();
  63         updateNoLock(other);
  64
  65         return *this;
  66 }
  67
  68
  69 bool Settings::checkNameValid(const std::string &name)
  70 {
  71         bool valid = name.find_first_of("=\"{}#") == std::string::npos;
  72         if (valid) valid = trim(name) == name;
  73         if (!valid) {
  74                 errorstream << "Invalid setting name \"" << name << "\""
  75                         << std::endl;
  76                 return false;
  77         }
  78         return true;
  79 }
  80
  81
  82 bool Settings::checkValueValid(const std::string &value)
  83 {
  84         if (value.substr(0, 3) == "\"\"\"" ||
  85                 value.find("\n\"\"\"") != std::string::npos) {
  86                 errorstream << "Invalid character sequence '\"\"\"' found in"
  87                         " setting value!" << std::endl;
  88                 return false;
  89         }
  90         return true;
  91 }
  92
  93 std::string Settings::getMultiline(std::istream &is, size_t *num_lines)
  94 {
  95         size_t lines = 1;
  96         std::string value;
  97         std::string line;
  98
  99         while (is.good()) {
 100                 lines++;
 101                 std::getline(is, line);
 102                 if (line == "\"\"\"")
 103                         break;
 104                 value += line;
 105                 value.push_back('\n');
 106         }
 107
 108         size_t len = value.size();
 109         if (len)
 110                 value.erase(len - 1);
 111
 112         if (num_lines)
 113                 *num_lines = lines;
 114
 115         return value;
 116 }
 117
 118
 119 bool Settings::readConfigFile(const char *filename)
 120 {
 121         std::ifstream is(filename);
 122         if (!is.good())
 123                 return false;
 124
 125         return parseConfigLines(is, "");
 126 }
 127
 128
 129 bool Settings::parseConfigLines(std::istream &is, const std::string &end)
 130 {
 131         MutexAutoLock lock(m_mutex);
 132
 133         std::string line, name, value;
 134
 135         while (is.good()) {
 136                 std::getline(is, line);
 137                 SettingsParseEvent event = parseConfigObject(line, end, name, value);
 138
 139                 switch (event) {
 140                 case SPE_NONE:
 141                 case SPE_INVALID:
 142                 case SPE_COMMENT:
 143                         break;
 144                 case SPE_KVPAIR:
 145                         m_settings[name] = SettingsEntry(value);
 146                         break;
 147                 case SPE_END:
 148                         return true;
 149                 case SPE_GROUP: {
 150                         Settings *group = new Settings;
 151                         if (!group->parseConfigLines(is, "}")) {
 152                                 delete group;
 153                                 return false;
 154                         }
 155                         m_settings[name] = SettingsEntry(group);
 156                         break;
 157                 }
 158                 case SPE_MULTILINE:
 159                         m_settings[name] = SettingsEntry(getMultiline(is));
 160                         break;
 161                 }
 162         }
 163
 164         return end.empty();
 165 }
 166
 167
 168 void Settings::writeLines(std::ostream &os, u32 tab_depth) const
 169 {
 170         MutexAutoLock lock(m_mutex);
 171
 172         for (SettingEntries::const_iterator it = m_settings.begin();
 173                         it != m_settings.end(); ++it)
 174                 printEntry(os, it->first, it->second, tab_depth);
 175 }
 176
 177
 178 void Settings::printEntry(std::ostream &os, const std::string &name,
 179         const SettingsEntry &entry, u32 tab_depth)
 180 {
 181         for (u32 i = 0; i != tab_depth; i++)
 182                 os << "\t";
 183
 184         if (entry.is_group) {
 185                 os << name << " = {\n";
 186
 187                 entry.group->writeLines(os, tab_depth + 1);
 188
 189                 for (u32 i = 0; i != tab_depth; i++)
 190                         os << "\t";
 191                 os << "}\n";
 192         } else {
 193                 os << name << " = ";
 194
 195                 if (entry.value.find('\n') != std::string::npos)
 196                         os << "\"\"\"\n" << entry.value << "\n\"\"\"\n";
 197                 else
 198                         os << entry.value << "\n";
 199         }
 200 }
 201
 202
 203 bool Settings::updateConfigObject(std::istream &is, std::ostream &os,
 204         const std::string &end, u32 tab_depth)
 205 {
 206         SettingEntries::const_iterator it;
 207         std::set<std::string> present_entries;
 208         std::string line, name, value;
 209         bool was_modified = false;
 210         bool end_found = false;
 211
 212         // Add any settings that exist in the config file with the current value
 213         // in the object if existing
 214         while (is.good() && !end_found) {
 215                 std::getline(is, line);
 216                 SettingsParseEvent event = parseConfigObject(line, end, name, value);
 217
 218                 switch (event) {
 219                 case SPE_END:
 220                         os << line << (is.eof() ? "" : "\n");
 221                         end_found = true;
 222                         break;
 223                 case SPE_MULTILINE:
 224                         value = getMultiline(is);
 225                         /* FALLTHROUGH */
 226                 case SPE_KVPAIR:
 227                         it = m_settings.find(name);
 228                         if (it != m_settings.end() &&
 229                                 (it->second.is_group || it->second.value != value)) {
 230                                 printEntry(os, name, it->second, tab_depth);
 231                                 was_modified = true;
 232                         } else {
 233                                 os << line << "\n";
 234                                 if (event == SPE_MULTILINE)
 235                                         os << value << "\n\"\"\"\n";
 236                         }
 237                         present_entries.insert(name);
 238                         break;
 239                 case SPE_GROUP:
 240                         it = m_settings.find(name);
 241                         if (it != m_settings.end() && it->second.is_group) {
 242                                 os << line << "\n";
 243                                 sanity_check(it->second.group != NULL);
 244                                 was_modified |= it->second.group->updateConfigObject(is, os,
 245                                         "}", tab_depth + 1);
 246                         } else {
 247                                 printEntry(os, name, it->second, tab_depth);
 248                                 was_modified = true;
 249                         }
 250                         present_entries.insert(name);
 251                         break;
 252                 default:
 253                         os << line << (is.eof() ? "" : "\n");
 254                         break;
 255                 }
 256         }
 257
 258         // Add any settings in the object that don't exist in the config file yet
 259         for (it = m_settings.begin(); it != m_settings.end(); ++it) {
 260                 if (present_entries.find(it->first) != present_entries.end())
 261                         continue;
 262
 263                 printEntry(os, it->first, it->second, tab_depth);
 264                 was_modified = true;
 265         }
 266
 267         return was_modified;
 268 }
 269
 270
 271 bool Settings::updateConfigFile(const char *filename)
 272 {
 273         MutexAutoLock lock(m_mutex);
 274
 275         std::ifstream is(filename);
 276         std::ostringstream os(std::ios_base::binary);
 277
 278         bool was_modified = updateConfigObject(is, os, "");
 279         is.close();
 280
 281         if (!was_modified)
 282                 return true;
 283
 284         if (!fs::safeWriteToFile(filename, os.str())) {
 285                 errorstream << "Error writing configuration file: \""
 286                         << filename << "\"" << std::endl;
 287                 return false;
 288         }
 289
 290         return true;
 291 }
 292
 293
 294 bool Settings::parseCommandLine(int argc, char *argv[],
 295                 std::map<std::string, ValueSpec> &allowed_options)
 296 {
 297         int nonopt_index = 0;
 298         for (int i = 1; i < argc; i++) {
 299                 std::string arg_name = argv[i];
 300                 if (arg_name.substr(0, 2) != "--") {
 301                         // If option doesn't start with -, read it in as nonoptX
 302                         if (arg_name[0] != '-'){
 303                                 std::string name = "nonopt";
 304                                 name += itos(nonopt_index);
 305                                 set(name, arg_name);
 306                                 nonopt_index++;
 307                                 continue;
 308                         }
 309                         errorstream << "Invalid command-line parameter \""
 310                                         << arg_name << "\": --<option> expected." << std::endl;
 311                         return false;
 312                 }
 313
 314                 std::string name = arg_name.substr(2);
 315
 316                 std::map<std::string, ValueSpec>::iterator n;
 317                 n = allowed_options.find(name);
 318                 if (n == allowed_options.end()) {
 319                         errorstream << "Unknown command-line parameter \""
 320                                         << arg_name << "\"" << std::endl;
 321                         return false;
 322                 }
 323
 324                 ValueType type = n->second.type;
 325
 326                 std::string value = "";
 327
 328                 if (type == VALUETYPE_FLAG) {
 329                         value = "true";
 330                 } else {
 331                         if ((i + 1) >= argc) {
 332                                 errorstream << "Invalid command-line parameter \""
 333                                                 << name << "\": missing value" << std::endl;
 334                                 return false;
 335                         }
 336                         value = argv[++i];
 337                 }
 338
 339                 set(name, value);
 340         }
 341
 342         return true;
 343 }
 344
 345
 346
 347 /***********
 348  * Getters *
 349  ***********/
 350
 351
 352 const SettingsEntry &Settings::getEntry(const std::string &name) const
 353 {
 354         MutexAutoLock lock(m_mutex);
 355
 356         SettingEntries::const_iterator n;
 357         if ((n = m_settings.find(name)) == m_settings.end()) {
 358                 if ((n = m_defaults.find(name)) == m_defaults.end())
 359                         throw SettingNotFoundException("Setting [" + name + "] not found.");
 360         }
 361         return n->second;
 362 }
 363
 364
 365 Settings *Settings::getGroup(const std::string &name) const
 366 {
 367         const SettingsEntry &entry = getEntry(name);
 368         if (!entry.is_group)
 369                 throw SettingNotFoundException("Setting [" + name + "] is not a group.");
 370         return entry.group;
 371 }
 372
 373
 374 const std::string &Settings::get(const std::string &name) const
 375 {
 376         const SettingsEntry &entry = getEntry(name);
 377         if (entry.is_group)
 378                 throw SettingNotFoundException("Setting [" + name + "] is a group.");
 379         return entry.value;
 380 }
 381
 382
 383 bool Settings::getBool(const std::string &name) const
 384 {
 385         return is_yes(get(name));
 386 }
 387
 388
 389 u16 Settings::getU16(const std::string &name) const
 390 {
 391         return stoi(get(name), 0, 65535);
 392 }
 393
 394
 395 s16 Settings::getS16(const std::string &name) const
 396 {
 397         return stoi(get(name), -32768, 32767);
 398 }
 399
 400
 401 u32 Settings::getU32(const std::string &name) const
 402 {
 403         return (u32) stoi(get(name));
 404 }
 405
 406 s32 Settings::getS32(const std::string &name) const
 407 {
 408         return stoi(get(name));
 409 }
 410
 411
 412 float Settings::getFloat(const std::string &name) const
 413 {
 414         return stof(get(name));
 415 }
 416
 417
 418 u64 Settings::getU64(const std::string &name) const
 419 {
 420         u64 value = 0;
 421         std::string s = get(name);
 422         std::istringstream ss(s);
 423         ss >> value;
 424         return value;
 425 }
 426
 427
 428 v2f Settings::getV2F(const std::string &name) const
 429 {
 430         v2f value;
 431         Strfnd f(get(name));
 432         f.next("(");
 433         value.X = stof(f.next(","));
 434         value.Y = stof(f.next(")"));
 435         return value;
 436 }
 437
 438
 439 v3f Settings::getV3F(const std::string &name) const
 440 {
 441         v3f value;
 442         Strfnd f(get(name));
 443         f.next("(");
 444         value.X = stof(f.next(","));
 445         value.Y = stof(f.next(","));
 446         value.Z = stof(f.next(")"));
 447         return value;
 448 }
 449
 450
 451 u32 Settings::getFlagStr(const std::string &name, const FlagDesc *flagdesc,
 452         u32 *flagmask) const
 453 {
 454         std::string val = get(name);
 455         return std::isdigit(val[0])
 456                 ? stoi(val)
 457                 : readFlagString(val, flagdesc, flagmask);
 458 }
 459
 460
 461 // N.B. if getStruct() is used to read a non-POD aggregate type,
 462 // the behavior is undefined.
 463 bool Settings::getStruct(const std::string &name, const std::string &format,
 464         void *out, size_t olen) const
 465 {
 466         std::string valstr;
 467
 468         try {
 469                 valstr = get(name);
 470         } catch (SettingNotFoundException &e) {
 471                 return false;
 472         }
 473
 474         if (!deSerializeStringToStruct(valstr, format, out, olen))
 475                 return false;
 476
 477         return true;
 478 }
 479
 480
 481 bool Settings::getNoiseParams(const std::string &name, NoiseParams &np) const
 482 {
 483         return getNoiseParamsFromGroup(name, np) || getNoiseParamsFromValue(name, np);
 484 }
 485
 486
 487 bool Settings::getNoiseParamsFromValue(const std::string &name,
 488         NoiseParams &np) const
 489 {
 490         std::string value;
 491
 492         if (!getNoEx(name, value))
 493                 return false;
 494
 495         Strfnd f(value);
 496
 497         np.offset   = stof(f.next(","));
 498         np.scale    = stof(f.next(","));
 499         f.next("(");
 500         np.spread.X = stof(f.next(","));
 501         np.spread.Y = stof(f.next(","));
 502         np.spread.Z = stof(f.next(")"));
 503         f.next(",");
 504         np.seed     = stoi(f.next(","));
 505         np.octaves  = stoi(f.next(","));
 506         np.persist  = stof(f.next(","));
 507
 508         std::string optional_params = f.next("");
 509         if (optional_params != "")
 510                 np.lacunarity = stof(optional_params);
 511
 512         return true;
 513 }
 514
 515
 516 bool Settings::getNoiseParamsFromGroup(const std::string &name,
 517         NoiseParams &np) const
 518 {
 519         Settings *group = NULL;
 520
 521         if (!getGroupNoEx(name, group))
 522                 return false;
 523
 524         group->getFloatNoEx("offset",      np.offset);
 525         group->getFloatNoEx("scale",       np.scale);
 526         group->getV3FNoEx("spread",        np.spread);
 527         group->getS32NoEx("seed",          np.seed);
 528         group->getU16NoEx("octaves",       np.octaves);
 529         group->getFloatNoEx("persistence", np.persist);
 530         group->getFloatNoEx("lacunarity",  np.lacunarity);
 531
 532         np.flags = 0;
 533         if (!group->getFlagStrNoEx("flags", np.flags, flagdesc_noiseparams))
 534                 np.flags = NOISE_FLAG_DEFAULTS;
 535
 536         return true;
 537 }
 538
 539
 540 bool Settings::exists(const std::string &name) const
 541 {
 542         MutexAutoLock lock(m_mutex);
 543
 544         return (m_settings.find(name) != m_settings.end() ||
 545                 m_defaults.find(name) != m_defaults.end());
 546 }
 547
 548
 549 std::vector<std::string> Settings::getNames() const
 550 {
 551         std::vector<std::string> names;
 552         for (SettingEntries::const_iterator i = m_settings.begin();
 553                         i != m_settings.end(); ++i) {
 554                 names.push_back(i->first);
 555         }
 556         return names;
 557 }
 558
 559
 560
 561 /***************************************
 562  * Getters that don't throw exceptions *
 563  ***************************************/
 564
 565 bool Settings::getEntryNoEx(const std::string &name, SettingsEntry &val) const
 566 {
 567         try {
 568                 val = getEntry(name);
 569                 return true;
 570         } catch (SettingNotFoundException &e) {
 571                 return false;
 572         }
 573 }
 574
 575
 576 bool Settings::getGroupNoEx(const std::string &name, Settings *&val) const
 577 {
 578         try {
 579                 val = getGroup(name);
 580                 return true;
 581         } catch (SettingNotFoundException &e) {
 582                 return false;
 583         }
 584 }
 585
 586
 587 bool Settings::getNoEx(const std::string &name, std::string &val) const
 588 {
 589         try {
 590                 val = get(name);
 591                 return true;
 592         } catch (SettingNotFoundException &e) {
 593                 return false;
 594         }
 595 }
 596
 597
 598 bool Settings::getFlag(const std::string &name) const
 599 {
 600         try {
 601                 return getBool(name);
 602         } catch(SettingNotFoundException &e) {
 603                 return false;
 604         }
 605 }
 606
 607
 608 bool Settings::getFloatNoEx(const std::string &name, float &val) const
 609 {
 610         try {
 611                 val = getFloat(name);
 612                 return true;
 613         } catch (SettingNotFoundException &e) {
 614                 return false;
 615         }
 616 }
 617
 618
 619 bool Settings::getU16NoEx(const std::string &name, u16 &val) const
 620 {
 621         try {
 622                 val = getU16(name);
 623                 return true;
 624         } catch (SettingNotFoundException &e) {
 625                 return false;
 626         }
 627 }
 628
 629
 630 bool Settings::getS16NoEx(const std::string &name, s16 &val) const
 631 {
 632         try {
 633                 val = getS16(name);
 634                 return true;
 635         } catch (SettingNotFoundException &e) {
 636                 return false;
 637         }
 638 }
 639
 640
 641 bool Settings::getS32NoEx(const std::string &name, s32 &val) const
 642 {
 643         try {
 644                 val = getS32(name);
 645                 return true;
 646         } catch (SettingNotFoundException &e) {
 647                 return false;
 648         }
 649 }
 650
 651
 652 bool Settings::getU64NoEx(const std::string &name, u64 &val) const
 653 {
 654         try {
 655                 val = getU64(name);
 656                 return true;
 657         } catch (SettingNotFoundException &e) {
 658                 return false;
 659         }
 660 }
 661
 662
 663 bool Settings::getV2FNoEx(const std::string &name, v2f &val) const
 664 {
 665         try {
 666                 val = getV2F(name);
 667                 return true;
 668         } catch (SettingNotFoundException &e) {
 669                 return false;
 670         }
 671 }
 672
 673
 674 bool Settings::getV3FNoEx(const std::string &name, v3f &val) const
 675 {
 676         try {
 677                 val = getV3F(name);
 678                 return true;
 679         } catch (SettingNotFoundException &e) {
 680                 return false;
 681         }
 682 }
 683
 684
 685 // N.B. getFlagStrNoEx() does not set val, but merely modifies it.  Thus,
 686 // val must be initialized before using getFlagStrNoEx().  The intention of
 687 // this is to simplify modifying a flags field from a default value.
 688 bool Settings::getFlagStrNoEx(const std::string &name, u32 &val,
 689         FlagDesc *flagdesc) const
 690 {
 691         try {
 692                 u32 flags, flagmask;
 693
 694                 flags = getFlagStr(name, flagdesc, &flagmask);
 695
 696                 val &= ~flagmask;
 697                 val |=  flags;
 698
 699                 return true;
 700         } catch (SettingNotFoundException &e) {
 701                 return false;
 702         }
 703 }
 704
 705
 706 /***********
 707  * Setters *
 708  ***********/
 709
 710 bool Settings::setEntry(const std::string &name, const void *data,
 711         bool set_group, bool set_default)
 712 {
 713         Settings *old_group = NULL;
 714
 715         if (!checkNameValid(name))
 716                 return false;
 717         if (!set_group && !checkValueValid(*(const std::string *)data))
 718                 return false;
 719
 720         {
 721                 MutexAutoLock lock(m_mutex);
 722
 723                 SettingsEntry &entry = set_default ? m_defaults[name] : m_settings[name];
 724                 old_group = entry.group;
 725
 726                 entry.value    = set_group ? "" : *(const std::string *)data;
 727                 entry.group    = set_group ? *(Settings **)data : NULL;
 728                 entry.is_group = set_group;
 729         }
 730
 731         delete old_group;
 732
 733         return true;
 734 }
 735
 736
 737 bool Settings::set(const std::string &name, const std::string &value)
 738 {
 739         if (!setEntry(name, &value, false, false))
 740                 return false;
 741
 742         doCallbacks(name);
 743         return true;
 744 }
 745
 746
 747 bool Settings::setDefault(const std::string &name, const std::string &value)
 748 {
 749         return setEntry(name, &value, false, true);
 750 }
 751
 752
 753 bool Settings::setGroup(const std::string &name, Settings *group)
 754 {
 755         return setEntry(name, &group, true, false);
 756 }
 757
 758
 759 bool Settings::setGroupDefault(const std::string &name, Settings *group)
 760 {
 761         return setEntry(name, &group, true, true);
 762 }
 763
 764
 765 bool Settings::setBool(const std::string &name, bool value)
 766 {
 767         return set(name, value ? "true" : "false");
 768 }
 769
 770
 771 bool Settings::setS16(const std::string &name, s16 value)
 772 {
 773         return set(name, itos(value));
 774 }
 775
 776
 777 bool Settings::setU16(const std::string &name, u16 value)
 778 {
 779         return set(name, itos(value));
 780 }
 781
 782
 783 bool Settings::setS32(const std::string &name, s32 value)
 784 {
 785         return set(name, itos(value));
 786 }
 787
 788
 789 bool Settings::setU64(const std::string &name, u64 value)
 790 {
 791         std::ostringstream os;
 792         os << value;
 793         return set(name, os.str());
 794 }
 795
 796
 797 bool Settings::setFloat(const std::string &name, float value)
 798 {
 799         return set(name, ftos(value));
 800 }
 801
 802
 803 bool Settings::setV2F(const std::string &name, v2f value)
 804 {
 805         std::ostringstream os;
 806         os << "(" << value.X << "," << value.Y << ")";
 807         return set(name, os.str());
 808 }
 809
 810
 811 bool Settings::setV3F(const std::string &name, v3f value)
 812 {
 813         std::ostringstream os;
 814         os << "(" << value.X << "," << value.Y << "," << value.Z << ")";
 815         return set(name, os.str());
 816 }
 817
 818
 819 bool Settings::setFlagStr(const std::string &name, u32 flags,
 820         const FlagDesc *flagdesc, u32 flagmask)
 821 {
 822         return set(name, writeFlagString(flags, flagdesc, flagmask));
 823 }
 824
 825
 826 bool Settings::setStruct(const std::string &name, const std::string &format,
 827         void *value)
 828 {
 829         std::string structstr;
 830         if (!serializeStructToString(&structstr, format, value))
 831                 return false;
 832
 833         return set(name, structstr);
 834 }
 835
 836
 837 bool Settings::setNoiseParams(const std::string &name,
 838         const NoiseParams &np, bool set_default)
 839 {
 840         Settings *group = new Settings;
 841
 842         group->setFloat("offset",      np.offset);
 843         group->setFloat("scale",       np.scale);
 844         group->setV3F("spread",        np.spread);
 845         group->setS32("seed",          np.seed);
 846         group->setU16("octaves",       np.octaves);
 847         group->setFloat("persistence", np.persist);
 848         group->setFloat("lacunarity",  np.lacunarity);
 849         group->setFlagStr("flags",     np.flags, flagdesc_noiseparams, np.flags);
 850
 851         return setEntry(name, &group, true, set_default);
 852 }
 853
 854
 855 bool Settings::remove(const std::string &name)
 856 {
 857         MutexAutoLock lock(m_mutex);
 858
 859         SettingEntries::iterator it = m_settings.find(name);
 860         if (it != m_settings.end()) {
 861                 delete it->second.group;
 862                 m_settings.erase(it);
 863                 return true;
 864         } else {
 865                 return false;
 866         }
 867 }
 868
 869
 870 void Settings::clear()
 871 {
 872         MutexAutoLock lock(m_mutex);
 873         clearNoLock();
 874 }
 875
 876 void Settings::clearDefaults()
 877 {
 878         MutexAutoLock lock(m_mutex);
 879         clearDefaultsNoLock();
 880 }
 881
 882 void Settings::updateValue(const Settings &other, const std::string &name)
 883 {
 884         if (&other == this)
 885                 return;
 886
 887         MutexAutoLock lock(m_mutex);
 888
 889         try {
 890                 std::string val = other.get(name);
 891                 m_settings[name] = val;
 892         } catch (SettingNotFoundException &e) {
 893         }
 894 }
 895
 896
 897 void Settings::update(const Settings &other)
 898 {
 899         if (&other == this)
 900                 return;
 901
 902         MutexAutoLock lock(m_mutex);
 903         MutexAutoLock lock2(other.m_mutex);
 904
 905         updateNoLock(other);
 906 }
 907
 908
 909 SettingsParseEvent Settings::parseConfigObject(const std::string &line,
 910         const std::string &end, std::string &name, std::string &value)
 911 {
 912         std::string trimmed_line = trim(line);
 913
 914         if (trimmed_line.empty())
 915                 return SPE_NONE;
 916         if (trimmed_line[0] == '#')
 917                 return SPE_COMMENT;
 918         if (trimmed_line == end)
 919                 return SPE_END;
 920
 921         size_t pos = trimmed_line.find('=');
 922         if (pos == std::string::npos)
 923                 return SPE_INVALID;
 924
 925         name  = trim(trimmed_line.substr(0, pos));
 926         value = trim(trimmed_line.substr(pos + 1));
 927
 928         if (value == "{")
 929                 return SPE_GROUP;
 930         if (value == "\"\"\"")
 931                 return SPE_MULTILINE;
 932
 933         return SPE_KVPAIR;
 934 }
 935
 936
 937 void Settings::updateNoLock(const Settings &other)
 938 {
 939         m_settings.insert(other.m_settings.begin(), other.m_settings.end());
 940         m_defaults.insert(other.m_defaults.begin(), other.m_defaults.end());
 941 }
 942
 943
 944 void Settings::clearNoLock()
 945 {
 946
 947         for (SettingEntries::const_iterator it = m_settings.begin();
 948                         it != m_settings.end(); ++it)
 949                 delete it->second.group;
 950         m_settings.clear();
 951
 952         clearDefaultsNoLock();
 953 }
 954
 955 void Settings::clearDefaultsNoLock()
 956 {
 957         for (SettingEntries::const_iterator it = m_defaults.begin();
 958                         it != m_defaults.end(); ++it)
 959                 delete it->second.group;
 960         m_defaults.clear();
 961 }
 962
 963
 964 void Settings::registerChangedCallback(const std::string &name,
 965         SettingsChangedCallback cbf, void *userdata)
 966 {
 967         MutexAutoLock lock(m_callback_mutex);
 968         m_callbacks[name].push_back(std::make_pair(cbf, userdata));
 969 }
 970
 971 void Settings::deregisterChangedCallback(const std::string &name,
 972         SettingsChangedCallback cbf, void *userdata)
 973 {
 974         MutexAutoLock lock(m_callback_mutex);
 975         SettingsCallbackMap::iterator it_cbks = m_callbacks.find(name);
 976
 977         if (it_cbks != m_callbacks.end()) {
 978                 SettingsCallbackList &cbks = it_cbks->second;
 979
 980                 SettingsCallbackList::iterator position =
 981                         std::find(cbks.begin(), cbks.end(), std::make_pair(cbf, userdata));
 982
 983                 if (position != cbks.end())
 984                         cbks.erase(position);
 985         }
 986 }
 987
 988 void Settings::doCallbacks(const std::string &name) const
 989 {
 990         MutexAutoLock lock(m_callback_mutex);
 991
 992         SettingsCallbackMap::const_iterator it_cbks = m_callbacks.find(name);
 993         if (it_cbks != m_callbacks.end()) {
 994                 SettingsCallbackList::const_iterator it;
 995                 for (it = it_cbks->second.begin(); it != it_cbks->second.end(); ++it)
 996                         (it->first)(name, it->second);
 997         }
 998 }