src/craftdef.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 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 "craftdef.h"
  21
  22 #include "irrlichttypes.h"
  23 #include "log.h"
  24 #include <sstream>
  25 #include <set>
  26 #include <algorithm>
  27 #include "gamedef.h"
  28 #include "inventory.h"
  29 #include "util/serialize.h"
  30 #include "util/string.h"
  31 #include "util/numeric.h"
  32 #include "strfnd.h"
  33 #include "exceptions.h"
  34
  35 inline bool isGroupRecipeStr(const std::string &rec_name)
  36 {
  37         return str_starts_with(rec_name, std::string("group:"));
  38 }
  39
  40 inline u64 getHashForString(const std::string &recipe_str)
  41 {
  42         /*errorstream << "Hashing craft string  \"" << recipe_str << '"';*/
  43         return murmur_hash_64_ua(recipe_str.data(), recipe_str.length(), 0xdeadbeef);
  44 }
  45
  46 static u64 getHashForGrid(CraftHashType type, const std::vector<std::string> &grid_names)
  47 {
  48         switch (type) {
  49                 case CRAFT_HASH_TYPE_ITEM_NAMES: {
  50                         std::ostringstream os;
  51                         bool is_first = true;
  52                         for (size_t i = 0; i < grid_names.size(); i++) {
  53                                 if (grid_names[i] != "") {
  54                                         os << (is_first ? "" : "\n") << grid_names[i];
  55                                         is_first = false;
  56                                 }
  57                         }
  58                         return getHashForString(os.str());
  59                 } case CRAFT_HASH_TYPE_COUNT: {
  60                         u64 cnt = 0;
  61                         for (size_t i = 0; i < grid_names.size(); i++)
  62                                 if (grid_names[i] != "")
  63                                         cnt++;
  64                         return cnt;
  65                 } case CRAFT_HASH_TYPE_UNHASHED:
  66                         return 0;
  67         }
  68         // invalid CraftHashType
  69         assert(false);
  70 }
  71
  72 // Check if input matches recipe
  73 // Takes recipe groups into account
  74 static bool inputItemMatchesRecipe(const std::string &inp_name,
  75                 const std::string &rec_name, IItemDefManager *idef)
  76 {
  77         // Exact name
  78         if (inp_name == rec_name)
  79                 return true;
  80
  81         // Group
  82         if (isGroupRecipeStr(rec_name) && idef->isKnown(inp_name)) {
  83                 const struct ItemDefinition &def = idef->get(inp_name);
  84                 Strfnd f(rec_name.substr(6));
  85                 bool all_groups_match = true;
  86                 do {
  87                         std::string check_group = f.next(",");
  88                         if (itemgroup_get(def.groups, check_group) == 0) {
  89                                 all_groups_match = false;
  90                                 break;
  91                         }
  92                 } while (!f.atend());
  93                 if (all_groups_match)
  94                         return true;
  95         }
  96
  97         // Didn't match
  98         return false;
  99 }
 100
 101 // Deserialize an itemstring then return the name of the item
 102 static std::string craftGetItemName(const std::string &itemstring, IGameDef *gamedef)
 103 {
 104         ItemStack item;
 105         item.deSerialize(itemstring, gamedef->idef());
 106         return item.name;
 107 }
 108
 109 // (mapcar craftGetItemName itemstrings)
 110 static std::vector<std::string> craftGetItemNames(
 111                 const std::vector<std::string> &itemstrings, IGameDef *gamedef)
 112 {
 113         std::vector<std::string> result;
 114         for (std::vector<std::string>::const_iterator
 115                         it = itemstrings.begin();
 116                         it != itemstrings.end(); it++) {
 117                 result.push_back(craftGetItemName(*it, gamedef));
 118         }
 119         return result;
 120 }
 121
 122 // Get name of each item, and return them as a new list.
 123 static std::vector<std::string> craftGetItemNames(
 124                 const std::vector<ItemStack> &items, IGameDef *gamedef)
 125 {
 126         std::vector<std::string> result;
 127         for (std::vector<ItemStack>::const_iterator
 128                         it = items.begin();
 129                         it != items.end(); it++) {
 130                 result.push_back(it->name);
 131         }
 132         return result;
 133 }
 134
 135 // convert a list of item names, to ItemStacks.
 136 static std::vector<ItemStack> craftGetItems(
 137                 const std::vector<std::string> &items, IGameDef *gamedef)
 138 {
 139         std::vector<ItemStack> result;
 140         for (std::vector<std::string>::const_iterator
 141                         it = items.begin();
 142                         it != items.end(); it++) {
 143                 result.push_back(ItemStack(std::string(*it), (u16)1,
 144                         (u16)0, "", gamedef->getItemDefManager()));
 145         }
 146         return result;
 147 }
 148
 149 // Compute bounding rectangle given a matrix of items
 150 // Returns false if every item is ""
 151 static bool craftGetBounds(const std::vector<std::string> &items, unsigned int width,
 152                 unsigned int &min_x, unsigned int &max_x,
 153                 unsigned int &min_y, unsigned int &max_y)
 154 {
 155         bool success = false;
 156         unsigned int x = 0;
 157         unsigned int y = 0;
 158         for (std::vector<std::string>::const_iterator
 159                         it = items.begin();
 160                         it != items.end(); it++) {
 161                 // Is this an actual item?
 162                 if (*it != "") {
 163                         if (!success) {
 164                                 // This is the first nonempty item
 165                                 min_x = max_x = x;
 166                                 min_y = max_y = y;
 167                                 success = true;
 168                         } else {
 169                                 if (x < min_x) min_x = x;
 170                                 if (x > max_x) max_x = x;
 171                                 if (y < min_y) min_y = y;
 172                                 if (y > max_y) max_y = y;
 173                         }
 174                 }
 175
 176                 // Step coordinate
 177                 x++;
 178                 if (x == width) {
 179                         x = 0;
 180                         y++;
 181                 }
 182         }
 183         return success;
 184 }
 185
 186 // Removes 1 from each item stack
 187 static void craftDecrementInput(CraftInput &input, IGameDef *gamedef)
 188 {
 189         for (std::vector<ItemStack>::iterator
 190                         it = input.items.begin();
 191                         it != input.items.end(); it++) {
 192                 if (it->count != 0)
 193                         it->remove(1);
 194         }
 195 }
 196
 197 // Removes 1 from each item stack with replacement support
 198 // Example: if replacements contains the pair ("bucket:bucket_water", "bucket:bucket_empty"),
 199 //   a water bucket will not be removed but replaced by an empty bucket.
 200 static void craftDecrementOrReplaceInput(CraftInput &input,
 201                 const CraftReplacements &replacements,
 202                 IGameDef *gamedef)
 203 {
 204         if (replacements.pairs.empty()) {
 205                 craftDecrementInput(input, gamedef);
 206                 return;
 207         }
 208
 209         // Make a copy of the replacements pair list
 210         std::vector<std::pair<std::string, std::string> > pairs = replacements.pairs;
 211
 212         for (std::vector<ItemStack>::iterator
 213                         it = input.items.begin();
 214                         it != input.items.end(); it++) {
 215                 if (it->count == 1) {
 216                         // Find an appropriate replacement
 217                         bool found_replacement = false;
 218                         for (std::vector<std::pair<std::string, std::string> >::iterator
 219                                         j = pairs.begin();
 220                                         j != pairs.end(); j++) {
 221                                 if (it->name == craftGetItemName(j->first, gamedef)) {
 222                                         it->deSerialize(j->second, gamedef->idef());
 223                                         found_replacement = true;
 224                                         pairs.erase(j);
 225                                         break;
 226                                 }
 227                         }
 228                         // No replacement was found, simply decrement count to zero
 229                         if (!found_replacement)
 230                                 it->remove(1);
 231                 } else if (it->count >= 2) {
 232                         // Ignore replacements for items with count >= 2
 233                         it->remove(1);
 234                 }
 235         }
 236 }
 237
 238 // Dump an itemstring matrix
 239 static std::string craftDumpMatrix(const std::vector<std::string> &items,
 240                 unsigned int width)
 241 {
 242         std::ostringstream os(std::ios::binary);
 243         os<<"{ ";
 244         unsigned int x = 0;
 245         for(std::vector<std::string>::const_iterator
 246                         it = items.begin();
 247                         it != items.end(); it++, x++) {
 248                 if (x == width) {
 249                         os<<"; ";
 250                         x = 0;
 251                 } else if (x != 0) {
 252                         os<<",";
 253                 }
 254                 os << '"' << (*it) << '"';
 255         }
 256         os << " }";
 257         return os.str();
 258 }
 259
 260 // Dump an item matrix
 261 std::string craftDumpMatrix(const std::vector<ItemStack> &items,
 262                 unsigned int width)
 263 {
 264         std::ostringstream os(std::ios::binary);
 265         os << "{ ";
 266         unsigned int x = 0;
 267         for (std::vector<ItemStack>::const_iterator
 268                         it = items.begin();
 269                         it != items.end(); it++, x++) {
 270                 if (x == width) {
 271                         os << "; ";
 272                         x = 0;
 273                 } else if (x != 0) {
 274                         os<<",";
 275                 }
 276                 os << '"' << (it->getItemString()) << '"';
 277         }
 278         os << " }";
 279         return os.str();
 280 }
 281
 282
 283 /*
 284         CraftInput
 285 */
 286
 287 std::string CraftInput::dump() const
 288 {
 289         std::ostringstream os(std::ios::binary);
 290         os << "(method=" << ((int)method) << ", items="
 291                 << craftDumpMatrix(items, width) << ")";
 292         return os.str();
 293 }
 294
 295 /*
 296         CraftOutput
 297 */
 298
 299 std::string CraftOutput::dump() const
 300 {
 301         std::ostringstream os(std::ios::binary);
 302         os << "(item=\"" << item << "\", time=" << time << ")";
 303         return os.str();
 304 }
 305
 306 /*
 307         CraftReplacements
 308 */
 309
 310 std::string CraftReplacements::dump() const
 311 {
 312         std::ostringstream os(std::ios::binary);
 313         os<<"{";
 314         const char *sep = "";
 315         for (std::vector<std::pair<std::string, std::string> >::const_iterator
 316                         it = pairs.begin();
 317                         it != pairs.end(); it++) {
 318                 os << sep << '"' << (it->first) << "\"=>\"" << (it->second) << '"';
 319                 sep = ",";
 320         }
 321         os << "}";
 322         return os.str();
 323 }
 324
 325 /*
 326         CraftDefinitionShaped
 327 */
 328
 329 std::string CraftDefinitionShaped::getName() const
 330 {
 331         return "shaped";
 332 }
 333
 334 bool CraftDefinitionShaped::check(const CraftInput &input, IGameDef *gamedef) const
 335 {
 336         if (input.method != CRAFT_METHOD_NORMAL)
 337                 return false;
 338
 339         // Get input item matrix
 340         std::vector<std::string> inp_names = craftGetItemNames(input.items, gamedef);
 341         unsigned int inp_width = input.width;
 342         if (inp_width == 0)
 343                 return false;
 344         while (inp_names.size() % inp_width != 0)
 345                 inp_names.push_back("");
 346
 347         // Get input bounds
 348         unsigned int inp_min_x = 0, inp_max_x = 0, inp_min_y = 0, inp_max_y = 0;
 349         if (!craftGetBounds(inp_names, inp_width, inp_min_x, inp_max_x,
 350                         inp_min_y, inp_max_y))
 351                 return false;  // it was empty
 352
 353         std::vector<std::string> rec_names;
 354         if (hash_inited)
 355                 rec_names = recipe_names;
 356         else
 357                 rec_names = craftGetItemNames(recipe, gamedef);
 358
 359         // Get recipe item matrix
 360         unsigned int rec_width = width;
 361         if (rec_width == 0)
 362                 return false;
 363         while (rec_names.size() % rec_width != 0)
 364                 rec_names.push_back("");
 365
 366         // Get recipe bounds
 367         unsigned int rec_min_x=0, rec_max_x=0, rec_min_y=0, rec_max_y=0;
 368         if (!craftGetBounds(rec_names, rec_width, rec_min_x, rec_max_x,
 369                         rec_min_y, rec_max_y))
 370                 return false;  // it was empty
 371
 372         // Different sizes?
 373         if (inp_max_x - inp_min_x != rec_max_x - rec_min_x ||
 374                         inp_max_y - inp_min_y != rec_max_y - rec_min_y)
 375                 return false;
 376
 377         // Verify that all item names in the bounding box are equal
 378         unsigned int w = inp_max_x - inp_min_x + 1;
 379         unsigned int h = inp_max_y - inp_min_y + 1;
 380
 381         for (unsigned int y=0; y < h; y++) {
 382                 unsigned int inp_y = (inp_min_y + y) * inp_width;
 383                 unsigned int rec_y = (rec_min_y + y) * rec_width;
 384
 385                 for (unsigned int x=0; x < w; x++) {
 386                         unsigned int inp_x = inp_min_x + x;
 387                         unsigned int rec_x = rec_min_x + x;
 388
 389                         if (!inputItemMatchesRecipe(
 390                                         inp_names[inp_y + inp_x],
 391                                         rec_names[rec_y + rec_x], gamedef->idef())) {
 392                                 return false;
 393                         }
 394                 }
 395         }
 396
 397         return true;
 398 }
 399
 400 CraftOutput CraftDefinitionShaped::getOutput(const CraftInput &input, IGameDef *gamedef) const
 401 {
 402         return CraftOutput(output, 0);
 403 }
 404
 405 CraftInput CraftDefinitionShaped::getInput(const CraftOutput &output, IGameDef *gamedef) const
 406 {
 407         return CraftInput(CRAFT_METHOD_NORMAL,width,craftGetItems(recipe,gamedef));
 408 }
 409
 410 void CraftDefinitionShaped::decrementInput(CraftInput &input, IGameDef *gamedef) const
 411 {
 412         craftDecrementOrReplaceInput(input, replacements, gamedef);
 413 }
 414
 415 CraftHashType CraftDefinitionShaped::getHashType() const
 416 {
 417         assert(hash_inited); // Pre-condition
 418         bool has_group = false;
 419         for (size_t i = 0; i < recipe_names.size(); i++) {
 420                 if (isGroupRecipeStr(recipe_names[i])) {
 421                         has_group = true;
 422                         break;
 423                 }
 424         }
 425         if (has_group)
 426                 return CRAFT_HASH_TYPE_COUNT;
 427         else
 428                 return CRAFT_HASH_TYPE_ITEM_NAMES;
 429 }
 430
 431 u64 CraftDefinitionShaped::getHash(CraftHashType type) const
 432 {
 433         assert(hash_inited); // Pre-condition
 434         assert((type == CRAFT_HASH_TYPE_ITEM_NAMES)
 435                 || (type == CRAFT_HASH_TYPE_COUNT)); // Pre-condition
 436
 437         std::vector<std::string> rec_names = recipe_names;
 438         std::sort(rec_names.begin(), rec_names.end());
 439         return getHashForGrid(type, rec_names);
 440 }
 441
 442 void CraftDefinitionShaped::initHash(IGameDef *gamedef)
 443 {
 444         if (hash_inited)
 445                 return;
 446         hash_inited = true;
 447         recipe_names = craftGetItemNames(recipe, gamedef);
 448 }
 449
 450 std::string CraftDefinitionShaped::dump() const
 451 {
 452         std::ostringstream os(std::ios::binary);
 453         os << "(shaped, output=\"" << output
 454                 << "\", recipe=" << craftDumpMatrix(recipe, width)
 455                 << ", replacements=" << replacements.dump() << ")";
 456         return os.str();
 457 }
 458
 459 /*
 460         CraftDefinitionShapeless
 461 */
 462
 463 std::string CraftDefinitionShapeless::getName() const
 464 {
 465         return "shapeless";
 466 }
 467
 468 bool CraftDefinitionShapeless::check(const CraftInput &input, IGameDef *gamedef) const
 469 {
 470         if (input.method != CRAFT_METHOD_NORMAL)
 471                 return false;
 472
 473         // Filter empty items out of input
 474         std::vector<std::string> input_filtered;
 475         for (std::vector<ItemStack>::const_iterator
 476                         it = input.items.begin();
 477                         it != input.items.end(); it++) {
 478                 if (it->name != "")
 479                         input_filtered.push_back(it->name);
 480         }
 481
 482         // If there is a wrong number of items in input, no match
 483         if (input_filtered.size() != recipe.size()) {
 484                 /*dstream<<"Number of input items ("<<input_filtered.size()
 485                                 <<") does not match recipe size ("<<recipe.size()<<") "
 486                                 <<"of recipe with output="<<output<<std::endl;*/
 487                 return false;
 488         }
 489
 490         std::vector<std::string> recipe_copy;
 491         if (hash_inited)
 492                 recipe_copy = recipe_names;
 493         else {
 494                 recipe_copy = craftGetItemNames(recipe, gamedef);
 495                 std::sort(recipe_copy.begin(), recipe_copy.end());
 496         }
 497
 498         // Try with all permutations of the recipe,
 499         // start from the lexicographically first permutation (=sorted),
 500         // recipe_names is pre-sorted
 501         do {
 502                 // If all items match, the recipe matches
 503                 bool all_match = true;
 504                 //dstream<<"Testing recipe (output="<<output<<"):";
 505                 for (size_t i=0; i<recipe.size(); i++) {
 506                         //dstream<<" ("<<input_filtered[i]<<" == "<<recipe_copy[i]<<")";
 507                         if (!inputItemMatchesRecipe(input_filtered[i], recipe_copy[i],
 508                                         gamedef->idef())) {
 509                                 all_match = false;
 510                                 break;
 511                         }
 512                 }
 513                 //dstream<<" -> match="<<all_match<<std::endl;
 514                 if (all_match)
 515                         return true;
 516         } while (std::next_permutation(recipe_copy.begin(), recipe_copy.end()));
 517
 518         return false;
 519 }
 520
 521 CraftOutput CraftDefinitionShapeless::getOutput(const CraftInput &input, IGameDef *gamedef) const
 522 {
 523         return CraftOutput(output, 0);
 524 }
 525
 526 CraftInput CraftDefinitionShapeless::getInput(const CraftOutput &output, IGameDef *gamedef) const
 527 {
 528         return CraftInput(CRAFT_METHOD_NORMAL, 0, craftGetItems(recipe, gamedef));
 529 }
 530
 531 void CraftDefinitionShapeless::decrementInput(CraftInput &input, IGameDef *gamedef) const
 532 {
 533         craftDecrementOrReplaceInput(input, replacements, gamedef);
 534 }
 535
 536 CraftHashType CraftDefinitionShapeless::getHashType() const
 537 {
 538         assert(hash_inited); // Pre-condition
 539         bool has_group = false;
 540         for (size_t i = 0; i < recipe_names.size(); i++) {
 541                 if (isGroupRecipeStr(recipe_names[i])) {
 542                         has_group = true;
 543                         break;
 544                 }
 545         }
 546         if (has_group)
 547                 return CRAFT_HASH_TYPE_COUNT;
 548         else
 549                 return CRAFT_HASH_TYPE_ITEM_NAMES;
 550 }
 551
 552 u64 CraftDefinitionShapeless::getHash(CraftHashType type) const
 553 {
 554         assert(hash_inited); // Pre-condition
 555         assert(type == CRAFT_HASH_TYPE_ITEM_NAMES
 556                 || type == CRAFT_HASH_TYPE_COUNT); // Pre-condition
 557         return getHashForGrid(type, recipe_names);
 558 }
 559
 560 void CraftDefinitionShapeless::initHash(IGameDef *gamedef)
 561 {
 562         if (hash_inited)
 563                 return;
 564         hash_inited = true;
 565         recipe_names = craftGetItemNames(recipe, gamedef);
 566         std::sort(recipe_names.begin(), recipe_names.end());
 567 }
 568
 569 std::string CraftDefinitionShapeless::dump() const
 570 {
 571         std::ostringstream os(std::ios::binary);
 572         os << "(shapeless, output=\"" << output
 573                 << "\", recipe=" << craftDumpMatrix(recipe, recipe.size())
 574                 << ", replacements=" << replacements.dump() << ")";
 575         return os.str();
 576 }
 577
 578 /*
 579         CraftDefinitionToolRepair
 580 */
 581
 582 static ItemStack craftToolRepair(
 583                 const ItemStack &item1,
 584                 const ItemStack &item2,
 585                 float additional_wear,
 586                 IGameDef *gamedef)
 587 {
 588         IItemDefManager *idef = gamedef->idef();
 589         if (item1.count != 1 || item2.count != 1 || item1.name != item2.name
 590                         || idef->get(item1.name).type != ITEM_TOOL
 591                         || idef->get(item2.name).type != ITEM_TOOL) {
 592                 // Failure
 593                 return ItemStack();
 594         }
 595
 596         s32 item1_uses = 65536 - (u32) item1.wear;
 597         s32 item2_uses = 65536 - (u32) item2.wear;
 598         s32 new_uses = item1_uses + item2_uses;
 599         s32 new_wear = 65536 - new_uses + floor(additional_wear * 65536 + 0.5);
 600         if (new_wear >= 65536)
 601                 return ItemStack();
 602         if (new_wear < 0)
 603                 new_wear = 0;
 604
 605         ItemStack repaired = item1;
 606         repaired.wear = new_wear;
 607         return repaired;
 608 }
 609
 610 std::string CraftDefinitionToolRepair::getName() const
 611 {
 612         return "toolrepair";
 613 }
 614
 615 bool CraftDefinitionToolRepair::check(const CraftInput &input, IGameDef *gamedef) const
 616 {
 617         if (input.method != CRAFT_METHOD_NORMAL)
 618                 return false;
 619
 620         ItemStack item1;
 621         ItemStack item2;
 622         for (std::vector<ItemStack>::const_iterator
 623                         it = input.items.begin();
 624                         it != input.items.end(); it++) {
 625                 if (!it->empty()) {
 626                         if (item1.empty())
 627                                 item1 = *it;
 628                         else if (item2.empty())
 629                                 item2 = *it;
 630                         else
 631                                 return false;
 632                 }
 633         }
 634         ItemStack repaired = craftToolRepair(item1, item2, additional_wear, gamedef);
 635         return !repaired.empty();
 636 }
 637
 638 CraftOutput CraftDefinitionToolRepair::getOutput(const CraftInput &input, IGameDef *gamedef) const
 639 {
 640         ItemStack item1;
 641         ItemStack item2;
 642         for (std::vector<ItemStack>::const_iterator
 643                         it = input.items.begin();
 644                         it != input.items.end(); it++) {
 645                 if (!it->empty()) {
 646                         if (item1.empty())
 647                                 item1 = *it;
 648                         else if (item2.empty())
 649                                 item2 = *it;
 650                 }
 651         }
 652         ItemStack repaired = craftToolRepair(item1, item2, additional_wear, gamedef);
 653         return CraftOutput(repaired.getItemString(), 0);
 654 }
 655
 656 CraftInput CraftDefinitionToolRepair::getInput(const CraftOutput &output, IGameDef *gamedef) const
 657 {
 658         std::vector<ItemStack> stack;
 659         stack.push_back(ItemStack());
 660         return CraftInput(CRAFT_METHOD_COOKING, additional_wear, stack);
 661 }
 662
 663 void CraftDefinitionToolRepair::decrementInput(CraftInput &input, IGameDef *gamedef) const
 664 {
 665         craftDecrementInput(input, gamedef);
 666 }
 667
 668 std::string CraftDefinitionToolRepair::dump() const
 669 {
 670         std::ostringstream os(std::ios::binary);
 671         os << "(toolrepair, additional_wear=" << additional_wear << ")";
 672         return os.str();
 673 }
 674
 675 /*
 676         CraftDefinitionCooking
 677 */
 678
 679 std::string CraftDefinitionCooking::getName() const
 680 {
 681         return "cooking";
 682 }
 683
 684 bool CraftDefinitionCooking::check(const CraftInput &input, IGameDef *gamedef) const
 685 {
 686         if (input.method != CRAFT_METHOD_COOKING)
 687                 return false;
 688
 689         // Filter empty items out of input
 690         std::vector<std::string> input_filtered;
 691         for (std::vector<ItemStack>::const_iterator
 692                         it = input.items.begin();
 693                         it != input.items.end(); it++) {
 694                 if (it->name != "")
 695                         input_filtered.push_back(it->name);
 696         }
 697
 698         // If there is a wrong number of items in input, no match
 699         if (input_filtered.size() != 1) {
 700                 /*dstream<<"Number of input items ("<<input_filtered.size()
 701                                 <<") does not match recipe size (1) "
 702                                 <<"of cooking recipe with output="<<output<<std::endl;*/
 703                 return false;
 704         }
 705
 706         // Check the single input item
 707         return inputItemMatchesRecipe(input_filtered[0], recipe, gamedef->idef());
 708 }
 709
 710 CraftOutput CraftDefinitionCooking::getOutput(const CraftInput &input, IGameDef *gamedef) const
 711 {
 712         return CraftOutput(output, cooktime);
 713 }
 714
 715 CraftInput CraftDefinitionCooking::getInput(const CraftOutput &output, IGameDef *gamedef) const
 716 {
 717         std::vector<std::string> rec;
 718         rec.push_back(recipe);
 719         return CraftInput(CRAFT_METHOD_COOKING,cooktime,craftGetItems(rec,gamedef));
 720 }
 721
 722 void CraftDefinitionCooking::decrementInput(CraftInput &input, IGameDef *gamedef) const
 723 {
 724         craftDecrementOrReplaceInput(input, replacements, gamedef);
 725 }
 726
 727 CraftHashType CraftDefinitionCooking::getHashType() const
 728 {
 729         if (isGroupRecipeStr(recipe_name))
 730                 return CRAFT_HASH_TYPE_COUNT;
 731         else
 732                 return CRAFT_HASH_TYPE_ITEM_NAMES;
 733 }
 734
 735 u64 CraftDefinitionCooking::getHash(CraftHashType type) const
 736 {
 737         if (type == CRAFT_HASH_TYPE_ITEM_NAMES) {
 738                 return getHashForString(recipe_name);
 739         } else if (type == CRAFT_HASH_TYPE_COUNT) {
 740                 return 1;
 741         } else {
 742                 //illegal hash type for this CraftDefinition (pre-condition)
 743                 assert(false);
 744                 return 0;
 745         }
 746 }
 747
 748 void CraftDefinitionCooking::initHash(IGameDef *gamedef)
 749 {
 750         if (hash_inited)
 751                 return;
 752         hash_inited = true;
 753         recipe_name = craftGetItemName(recipe, gamedef);
 754 }
 755
 756 std::string CraftDefinitionCooking::dump() const
 757 {
 758         std::ostringstream os(std::ios::binary);
 759         os << "(cooking, output=\"" << output
 760                 << "\", recipe=\"" << recipe
 761                 << "\", cooktime=" << cooktime << ")"
 762                 << ", replacements=" << replacements.dump() << ")";
 763         return os.str();
 764 }
 765
 766 /*
 767         CraftDefinitionFuel
 768 */
 769
 770 std::string CraftDefinitionFuel::getName() const
 771 {
 772         return "fuel";
 773 }
 774
 775 bool CraftDefinitionFuel::check(const CraftInput &input, IGameDef *gamedef) const
 776 {
 777         if (input.method != CRAFT_METHOD_FUEL)
 778                 return false;
 779
 780         // Filter empty items out of input
 781         std::vector<std::string> input_filtered;
 782         for (std::vector<ItemStack>::const_iterator
 783                         it = input.items.begin();
 784                         it != input.items.end(); it++) {
 785                 if (it->name != "")
 786                         input_filtered.push_back(it->name);
 787         }
 788
 789         // If there is a wrong number of items in input, no match
 790         if (input_filtered.size() != 1) {
 791                 /*dstream<<"Number of input items ("<<input_filtered.size()
 792                                 <<") does not match recipe size (1) "
 793                                 <<"of fuel recipe with burntime="<<burntime<<std::endl;*/
 794                 return false;
 795         }
 796
 797         // Check the single input item
 798         return inputItemMatchesRecipe(input_filtered[0], recipe, gamedef->idef());
 799 }
 800
 801 CraftOutput CraftDefinitionFuel::getOutput(const CraftInput &input, IGameDef *gamedef) const
 802 {
 803         return CraftOutput("", burntime);
 804 }
 805
 806 CraftInput CraftDefinitionFuel::getInput(const CraftOutput &output, IGameDef *gamedef) const
 807 {
 808         std::vector<std::string> rec;
 809         rec.push_back(recipe);
 810         return CraftInput(CRAFT_METHOD_COOKING,(int)burntime,craftGetItems(rec,gamedef));
 811 }
 812
 813 void CraftDefinitionFuel::decrementInput(CraftInput &input, IGameDef *gamedef) const
 814 {
 815         craftDecrementOrReplaceInput(input, replacements, gamedef);
 816 }
 817
 818 CraftHashType CraftDefinitionFuel::getHashType() const
 819 {
 820         if (isGroupRecipeStr(recipe_name))
 821                 return CRAFT_HASH_TYPE_COUNT;
 822         else
 823                 return CRAFT_HASH_TYPE_ITEM_NAMES;
 824 }
 825
 826 u64 CraftDefinitionFuel::getHash(CraftHashType type) const
 827 {
 828         if (type == CRAFT_HASH_TYPE_ITEM_NAMES) {
 829                 return getHashForString(recipe_name);
 830         } else if (type == CRAFT_HASH_TYPE_COUNT) {
 831                 return 1;
 832         } else {
 833                 //illegal hash type for this CraftDefinition (pre-condition)
 834                 assert(false);
 835                 return 0;
 836         }
 837 }
 838
 839 void CraftDefinitionFuel::initHash(IGameDef *gamedef)
 840 {
 841         if (hash_inited)
 842                 return;
 843         hash_inited = true;
 844         recipe_name = craftGetItemName(recipe, gamedef);
 845 }
 846 std::string CraftDefinitionFuel::dump() const
 847 {
 848         std::ostringstream os(std::ios::binary);
 849         os << "(fuel, recipe=\"" << recipe
 850                 << "\", burntime=" << burntime << ")"
 851                 << ", replacements=" << replacements.dump() << ")";
 852         return os.str();
 853 }
 854
 855 /*
 856         Craft definition manager
 857 */
 858
 859 class CCraftDefManager: public IWritableCraftDefManager
 860 {
 861 public:
 862         CCraftDefManager()
 863         {
 864                 m_craft_defs.resize(craft_hash_type_max + 1);
 865         }
 866
 867         virtual ~CCraftDefManager()
 868         {
 869                 clear();
 870         }
 871
 872         virtual bool getCraftResult(CraftInput &input, CraftOutput &output,
 873                         bool decrementInput, IGameDef *gamedef) const
 874         {
 875                 output.item = "";
 876                 output.time = 0;
 877
 878                 // If all input items are empty, abort.
 879                 bool all_empty = true;
 880                 for (std::vector<ItemStack>::const_iterator
 881                                 it = input.items.begin();
 882                                 it != input.items.end(); it++) {
 883                         if (!it->empty()) {
 884                                 all_empty = false;
 885                                 break;
 886                         }
 887                 }
 888                 if (all_empty)
 889                         return false;
 890
 891                 std::vector<std::string> input_names;
 892                 input_names = craftGetItemNames(input.items, gamedef);
 893                 std::sort(input_names.begin(), input_names.end());
 894
 895                 // Try hash types with increasing collision rate, and return if found.
 896                 for (int type = 0; type <= craft_hash_type_max; type++) {
 897                         u64 hash = getHashForGrid((CraftHashType) type, input_names);
 898
 899                         /*errorstream << "Checking type " << type << " with hash " << hash << std::endl;*/
 900
 901                         // We'd like to do "const [...] hash_collisions = m_craft_defs[type][hash];"
 902                         // but that doesn't compile for some reason. This does.
 903                         std::map<u64, std::vector<CraftDefinition*> >::const_iterator
 904                                 col_iter = (m_craft_defs[type]).find(hash);
 905
 906                         if (col_iter == (m_craft_defs[type]).end())
 907                                 continue;
 908
 909                         const std::vector<CraftDefinition*> &hash_collisions = col_iter->second;
 910                         // Walk crafting definitions from back to front, so that later
 911                         // definitions can override earlier ones.
 912                         for (std::vector<CraftDefinition*>::const_reverse_iterator
 913                                         it = hash_collisions.rbegin();
 914                                         it != hash_collisions.rend(); it++) {
 915                                 CraftDefinition *def = *it;
 916
 917                                 /*errorstream << "Checking " << input.dump() << std::endl
 918                                         << " against " << def->dump() << std::endl;*/
 919
 920                                 if (def->check(input, gamedef)) {
 921                                         // Get output, then decrement input (if requested)
 922                                         output = def->getOutput(input, gamedef);
 923                                         if (decrementInput)
 924                                                 def->decrementInput(input, gamedef);
 925                                         /*errorstream << "Check RETURNS TRUE" << std::endl;*/
 926                                         return true;
 927                                 }
 928                         }
 929                 }
 930                 return false;
 931         }
 932
 933         virtual std::vector<CraftDefinition*> getCraftRecipes(CraftOutput &output,
 934                         IGameDef *gamedef, unsigned limit=0) const
 935         {
 936                 std::vector<CraftDefinition*> recipes;
 937
 938                 std::map<std::string, std::vector<CraftDefinition*> >::const_iterator
 939                         vec_iter = m_output_craft_definitions.find(output.item);
 940
 941                 if (vec_iter == m_output_craft_definitions.end())
 942                         return recipes;
 943
 944                 const std::vector<CraftDefinition*> &vec = vec_iter->second;
 945
 946                 recipes.reserve(limit ? MYMIN(limit, vec.size()) : vec.size());
 947
 948                 for (std::vector<CraftDefinition*>::const_reverse_iterator
 949                                 it = vec.rbegin(); it != vec.rend(); ++it) {
 950                         if (limit && recipes.size() >= limit)
 951                                 break;
 952                         recipes.push_back(*it);
 953                 }
 954
 955                 return recipes;
 956         }
 957         virtual std::string dump() const
 958         {
 959                 std::ostringstream os(std::ios::binary);
 960                 os << "Crafting definitions:\n";
 961                 for (int type = 0; type <= craft_hash_type_max; type++) {
 962                         for (std::map<u64, std::vector<CraftDefinition*> >::const_iterator
 963                                         it = (m_craft_defs[type]).begin();
 964                                         it != (m_craft_defs[type]).end(); it++) {
 965                                 for (std::vector<CraftDefinition*>::const_iterator
 966                                                 iit = it->second.begin(); iit != it->second.end(); iit++) {
 967                                         os << "type " << type << " hash " << it->first << (*iit)->dump() << "\n";
 968                                 }
 969                         }
 970                 }
 971                 return os.str();
 972         }
 973         virtual void registerCraft(CraftDefinition *def, IGameDef *gamedef)
 974         {
 975                 verbosestream << "registerCraft: registering craft definition: "
 976                                 << def->dump() << std::endl;
 977                 m_craft_defs[(int) CRAFT_HASH_TYPE_UNHASHED][0].push_back(def);
 978
 979                 CraftInput input;
 980                 std::string output_name = craftGetItemName(
 981                                 def->getOutput(input, gamedef).item, gamedef);
 982                 m_output_craft_definitions[output_name].push_back(def);
 983         }
 984         virtual void clear()
 985         {
 986                 for (int type = 0; type <= craft_hash_type_max; type++) {
 987                         for (std::map<u64, std::vector<CraftDefinition*> >::iterator
 988                                         it = m_craft_defs[type].begin();
 989                                         it != m_craft_defs[type].end(); it++) {
 990                                 for (std::vector<CraftDefinition*>::iterator
 991                                                 iit = it->second.begin(); iit != it->second.end(); iit++) {
 992                                         delete *iit;
 993                                 }
 994                                 it->second.clear();
 995                         }
 996                         m_craft_defs[type].clear();
 997                 }
 998                 m_output_craft_definitions.clear();
 999         }
1000         virtual void initHashes(IGameDef *gamedef)
1001         {
1002                 // Move the CraftDefs from the unhashed layer into layers higher up.
1003                 for (std::vector<CraftDefinition*>::iterator
1004                         it = (m_craft_defs[(int) CRAFT_HASH_TYPE_UNHASHED][0]).begin();
1005                         it != (m_craft_defs[(int) CRAFT_HASH_TYPE_UNHASHED][0]).end(); it++) {
1006                         CraftDefinition *def = *it;
1007
1008                         // Initialize and get the definition's hash
1009                         def->initHash(gamedef);
1010                         CraftHashType type = def->getHashType();
1011                         u64 hash = def->getHash(type);
1012
1013                         // Enter the definition
1014                         m_craft_defs[type][hash].push_back(def);
1015                 }
1016                 m_craft_defs[(int) CRAFT_HASH_TYPE_UNHASHED][0].clear();
1017         }
1018 private:
1019         //TODO: change both maps to unordered_map when c++11 can be used
1020         std::vector<std::map<u64, std::vector<CraftDefinition*> > > m_craft_defs;
1021         std::map<std::string, std::vector<CraftDefinition*> > m_output_craft_definitions;
1022 };
1023
1024 IWritableCraftDefManager* createCraftDefManager()
1025 {
1026         return new CCraftDefManager();
1027 }
1028