]> git.lizzy.rs Git - minetest.git/blobdiff - src/craftdef.cpp
Add callback on_mapblocks_changed
[minetest.git] / src / craftdef.cpp
index 9ce5faa95f524a8c8901c0d2b3120446f732dc88..eb703fdbee4251fad6ffc5b5a7663ae8adb7bf81 100644 (file)
@@ -22,14 +22,14 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "irrlichttypes.h"
 #include "log.h"
 #include <sstream>
-#include <set>
+#include <unordered_set>
 #include <algorithm>
 #include "gamedef.h"
 #include "inventory.h"
 #include "util/serialize.h"
 #include "util/string.h"
 #include "util/numeric.h"
-#include "strfnd.h"
+#include "util/strfnd.h"
 #include "exceptions.h"
 
 inline bool isGroupRecipeStr(const std::string &rec_name)
@@ -37,9 +37,18 @@ inline bool isGroupRecipeStr(const std::string &rec_name)
        return str_starts_with(rec_name, std::string("group:"));
 }
 
+static bool hasGroupItem(const std::vector<std::string> &recipe)
+{
+       for (const auto &item : recipe) {
+               if (isGroupRecipeStr(item))
+                       return true;
+       }
+       return false;
+}
+
 inline u64 getHashForString(const std::string &recipe_str)
 {
-       /*errorstream << "Hashing craft string  \"" << recipe_str << "\"";*/
+       /*errorstream << "Hashing craft string  \"" << recipe_str << '"';*/
        return murmur_hash_64_ua(recipe_str.data(), recipe_str.length(), 0xdeadbeef);
 }
 
@@ -49,17 +58,17 @@ static u64 getHashForGrid(CraftHashType type, const std::vector<std::string> &gr
                case CRAFT_HASH_TYPE_ITEM_NAMES: {
                        std::ostringstream os;
                        bool is_first = true;
-                       for (size_t i = 0; i < grid_names.size(); i++) {
-                               if (grid_names[i] != "") {
-                                       os << (is_first ? "" : "\n") << grid_names[i];
+                       for (const std::string &grid_name : grid_names) {
+                               if (!grid_name.empty()) {
+                                       os << (is_first ? "" : "\n") << grid_name;
                                        is_first = false;
                                }
                        }
                        return getHashForString(os.str());
                } case CRAFT_HASH_TYPE_COUNT: {
                        u64 cnt = 0;
-                       for (size_t i = 0; i < grid_names.size(); i++)
-                               if (grid_names[i] != "")
+                       for (const std::string &grid_name : grid_names)
+                               if (!grid_name.empty())
                                        cnt++;
                        return cnt;
                } case CRAFT_HASH_TYPE_UNHASHED:
@@ -67,6 +76,7 @@ static u64 getHashForGrid(CraftHashType type, const std::vector<std::string> &gr
        }
        // invalid CraftHashType
        assert(false);
+       return 0;
 }
 
 // Check if input matches recipe
@@ -75,7 +85,7 @@ static bool inputItemMatchesRecipe(const std::string &inp_name,
                const std::string &rec_name, IItemDefManager *idef)
 {
        // Exact name
-       if(inp_name == rec_name)
+       if (inp_name == rec_name)
                return true;
 
        // Group
@@ -83,14 +93,14 @@ static bool inputItemMatchesRecipe(const std::string &inp_name,
                const struct ItemDefinition &def = idef->get(inp_name);
                Strfnd f(rec_name.substr(6));
                bool all_groups_match = true;
-               do{
+               do {
                        std::string check_group = f.next(",");
-                       if(itemgroup_get(def.groups, check_group) == 0){
+                       if (itemgroup_get(def.groups, check_group) == 0) {
                                all_groups_match = false;
                                break;
                        }
-               }while(!f.atend());
-               if(all_groups_match)
+               } while (!f.at_end());
+               if (all_groups_match)
                        return true;
        }
 
@@ -111,11 +121,9 @@ static std::vector<std::string> craftGetItemNames(
                const std::vector<std::string> &itemstrings, IGameDef *gamedef)
 {
        std::vector<std::string> result;
-       for(std::vector<std::string>::const_iterator
-                       i = itemstrings.begin();
-                       i != itemstrings.end(); i++)
-       {
-               result.push_back(craftGetItemName(*i, gamedef));
+       result.reserve(itemstrings.size());
+       for (const auto &itemstring : itemstrings) {
+               result.push_back(craftGetItemName(itemstring, gamedef));
        }
        return result;
 }
@@ -125,11 +133,9 @@ static std::vector<std::string> craftGetItemNames(
                const std::vector<ItemStack> &items, IGameDef *gamedef)
 {
        std::vector<std::string> result;
-       for(std::vector<ItemStack>::const_iterator
-                       i = items.begin();
-                       i != items.end(); i++)
-       {
-               result.push_back(i->name);
+       result.reserve(items.size());
+       for (const auto &item : items) {
+               result.push_back(item.name);
        }
        return result;
 }
@@ -139,11 +145,10 @@ static std::vector<ItemStack> craftGetItems(
                const std::vector<std::string> &items, IGameDef *gamedef)
 {
        std::vector<ItemStack> result;
-       for(std::vector<std::string>::const_iterator
-                       i = items.begin();
-                       i != items.end(); i++)
-       {
-               result.push_back(ItemStack(std::string(*i),(u16)1,(u16)0,"",gamedef->getItemDefManager()));
+       result.reserve(items.size());
+       for (const auto &item : items) {
+               result.emplace_back(std::string(item), (u16)1,
+                       (u16)0, gamedef->getItemDefManager());
        }
        return result;
 }
@@ -157,32 +162,25 @@ static bool craftGetBounds(const std::vector<std::string> &items, unsigned int w
        bool success = false;
        unsigned int x = 0;
        unsigned int y = 0;
-       for(std::vector<std::string>::const_iterator
-                       i = items.begin();
-                       i != items.end(); i++)
-       {
-               if(*i != "")  // Is this an actual item?
-               {
-                       if(!success)
-                       {
+       for (const std::string &item : items) {
+               // Is this an actual item?
+               if (!item.empty()) {
+                       if (!success) {
                                // This is the first nonempty item
                                min_x = max_x = x;
                                min_y = max_y = y;
                                success = true;
-                       }
-                       else
-                       {
-                               if(x < min_x) min_x = x;
-                               if(x > max_x) max_x = x;
-                               if(y < min_y) min_y = y;
-                               if(y > max_y) max_y = y;
+                       } else {
+                               if (x < min_x) min_x = x;
+                               if (x > max_x) max_x = x;
+                               if (y < min_y) min_y = y;
+                               if (y > max_y) max_y = y;
                        }
                }
 
                // Step coordinate
                x++;
-               if(x == width)
-               {
+               if (x == width) {
                        x = 0;
                        y++;
                }
@@ -193,12 +191,9 @@ static bool craftGetBounds(const std::vector<std::string> &items, unsigned int w
 // Removes 1 from each item stack
 static void craftDecrementInput(CraftInput &input, IGameDef *gamedef)
 {
-       for(std::vector<ItemStack>::iterator
-                       i = input.items.begin();
-                       i != input.items.end(); i++)
-       {
-               if(i->count != 0)
-                       i->remove(1);
+       for (auto &item : input.items) {
+               if (item.count != 0)
+                       item.remove(1);
        }
 }
 
@@ -206,11 +201,11 @@ static void craftDecrementInput(CraftInput &input, IGameDef *gamedef)
 // Example: if replacements contains the pair ("bucket:bucket_water", "bucket:bucket_empty"),
 //   a water bucket will not be removed but replaced by an empty bucket.
 static void craftDecrementOrReplaceInput(CraftInput &input,
+               std::vector<ItemStack> &output_replacements,
                const CraftReplacements &replacements,
                IGameDef *gamedef)
 {
-       if(replacements.pairs.empty())
-       {
+       if (replacements.pairs.empty()) {
                craftDecrementInput(input, gamedef);
                return;
        }
@@ -218,37 +213,31 @@ static void craftDecrementOrReplaceInput(CraftInput &input,
        // Make a copy of the replacements pair list
        std::vector<std::pair<std::string, std::string> > pairs = replacements.pairs;
 
-       for(std::vector<ItemStack>::iterator
-                       i = input.items.begin();
-                       i != input.items.end(); i++)
-       {
-               if(i->count == 1)
-               {
-                       // Find an appropriate replacement
-                       bool found_replacement = false;
-                       for(std::vector<std::pair<std::string, std::string> >::iterator
-                                       j = pairs.begin();
-                                       j != pairs.end(); j++)
-                       {
-                               ItemStack from_item;
-                               from_item.deSerialize(j->first, gamedef->idef());
-                               if(i->name == from_item.name)
-                               {
-                                       i->deSerialize(j->second, gamedef->idef());
+       for (auto &item : input.items) {
+               // Find an appropriate replacement
+               bool found_replacement = false;
+               for (auto j = pairs.begin(); j != pairs.end(); ++j) {
+                       if (inputItemMatchesRecipe(item.name, j->first, gamedef->idef())) {
+                               if (item.count == 1) {
+                                       item.deSerialize(j->second, gamedef->idef());
                                        found_replacement = true;
                                        pairs.erase(j);
                                        break;
                                }
+
+                               ItemStack rep;
+                               rep.deSerialize(j->second, gamedef->idef());
+                               item.remove(1);
+                               found_replacement = true;
+                               pairs.erase(j);
+                               output_replacements.push_back(rep);
+                               break;
+
                        }
-                       // No replacement was found, simply decrement count to zero
-                       if(!found_replacement)
-                               i->remove(1);
-               }
-               else if(i->count >= 2)
-               {
-                       // Ignore replacements for items with count >= 2
-                       i->remove(1);
                }
+               // No replacement was found, simply decrement count by one
+               if (!found_replacement && item.count > 0)
+                       item.remove(1);
        }
 }
 
@@ -257,24 +246,19 @@ static std::string craftDumpMatrix(const std::vector<std::string> &items,
                unsigned int width)
 {
        std::ostringstream os(std::ios::binary);
-       os<<"{ ";
+       os << "{ ";
        unsigned int x = 0;
-       for(std::vector<std::string>::const_iterator
-                       i = items.begin();
-                       i != items.end(); i++, x++)
-       {
-               if(x == width)
-               {
-                       os<<"; ";
+       for(std::vector<std::string>::size_type i = 0;
+                       i < items.size(); i++, x++) {
+               if (x == width) {
+                       os << "; ";
                        x = 0;
+               } else if (x != 0) {
+                       os << ",";
                }
-               else if(x != 0)
-               {
-                       os<<",";
-               }
-               os<<"\""<<(*i)<<"\"";
+               os << '"' << items[i] << '"';
        }
-       os<<" }";
+       os << " }";
        return os.str();
 }
 
@@ -283,24 +267,19 @@ std::string craftDumpMatrix(const std::vector<ItemStack> &items,
                unsigned int width)
 {
        std::ostringstream os(std::ios::binary);
-       os<<"{ ";
+       os << "{ ";
        unsigned int x = 0;
-       for(std::vector<ItemStack>::const_iterator
-                       i = items.begin();
-                       i != items.end(); i++, x++)
-       {
-               if(x == width)
-               {
-                       os<<"; ";
+       for (std::vector<ItemStack>::size_type i = 0;
+                       i < items.size(); i++, x++) {
+               if (x == width) {
+                       os << "; ";
                        x = 0;
+               } else if (x != 0) {
+                       os << ",";
                }
-               else if(x != 0)
-               {
-                       os<<",";
-               }
-               os<<"\""<<(i->getItemString())<<"\"";
+               os << '"' << (items[i].getItemString()) << '"';
        }
-       os<<" }";
+       os << " }";
        return os.str();
 }
 
@@ -309,10 +288,20 @@ std::string craftDumpMatrix(const std::vector<ItemStack> &items,
        CraftInput
 */
 
+bool CraftInput::empty() const
+{
+       for (const auto &item : items) {
+               if (!item.empty())
+                       return false;
+       }
+       return true;
+}
+
 std::string CraftInput::dump() const
 {
        std::ostringstream os(std::ios::binary);
-       os<<"(method="<<((int)method)<<", items="<<craftDumpMatrix(items, width)<<")";
+       os << "(method=" << ((int)method) << ", items="
+               << craftDumpMatrix(items, width) << ")";
        return os.str();
 }
 
@@ -323,7 +312,7 @@ std::string CraftInput::dump() const
 std::string CraftOutput::dump() const
 {
        std::ostringstream os(std::ios::binary);
-       os<<"(item=\""<<item<<"\", time="<<time<<")";
+       os << "(item=\"" << item << "\", time=" << time << ")";
        return os.str();
 }
 
@@ -336,90 +325,33 @@ std::string CraftReplacements::dump() const
        std::ostringstream os(std::ios::binary);
        os<<"{";
        const char *sep = "";
-       for(std::vector<std::pair<std::string, std::string> >::const_iterator
-                       i = pairs.begin();
-                       i != pairs.end(); i++)
-       {
-               os<<sep<<"\""<<(i->first)<<"\"=>\""<<(i->second)<<"\"";
+       for (const auto &repl_p : pairs) {
+               os << sep
+                       << '"' << (repl_p.first)
+                       << "\"=>\"" << (repl_p.second) << '"';
                sep = ",";
        }
-       os<<"}";
+       os << "}";
        return os.str();
 }
 
-void CraftReplacements::serialize(std::ostream &os) const
-{
-       writeU16(os, pairs.size());
-       for(u32 i=0; i<pairs.size(); i++)
-       {
-               os<<serializeString(pairs[i].first);
-               os<<serializeString(pairs[i].second);
-       }
-}
-
-void CraftReplacements::deSerialize(std::istream &is)
-{
-       pairs.clear();
-       u32 count = readU16(is);
-       for(u32 i=0; i<count; i++)
-       {
-               std::string first = deSerializeString(is);
-               std::string second = deSerializeString(is);
-               pairs.push_back(std::make_pair(first, second));
-       }
-}
-
 /*
-       CraftDefinition
+       CraftDefinitionShaped
 */
 
-void CraftDefinition::serialize(std::ostream &os) const
-{
-       writeU8(os, 1); // version
-       os<<serializeString(getName());
-       serializeBody(os);
-}
-
-CraftDefinition* CraftDefinition::deSerialize(std::istream &is)
+CraftDefinitionShaped::CraftDefinitionShaped(
+               const std::string &output_,
+               unsigned int width_,
+               const std::vector<std::string> &recipe_,
+               const CraftReplacements &replacements_):
+       output(output_), width(width_), recipe(recipe_), replacements(replacements_)
 {
-       int version = readU8(is);
-       if(version != 1) throw SerializationError(
-                       "unsupported CraftDefinition version");
-       std::string name = deSerializeString(is);
-       CraftDefinition *def = NULL;
-       if(name == "shaped")
-       {
-               def = new CraftDefinitionShaped;
-       }
-       else if(name == "shapeless")
-       {
-               def = new CraftDefinitionShapeless;
-       }
-       else if(name == "toolrepair")
-       {
-               def = new CraftDefinitionToolRepair;
-       }
-       else if(name == "cooking")
-       {
-               def = new CraftDefinitionCooking;
-       }
-       else if(name == "fuel")
-       {
-               def = new CraftDefinitionFuel;
-       }
+       if (hasGroupItem(recipe))
+               priority = PRIORITY_SHAPED_AND_GROUPS;
        else
-       {
-               infostream<<"Unknown CraftDefinition name=\""<<name<<"\""<<std::endl;
-                throw SerializationError("Unknown CraftDefinition name");
-       }
-       def->deSerializeBody(is, version);
-       return def;
+               priority = PRIORITY_SHAPED;
 }
 
-/*
-       CraftDefinitionShaped
-*/
-
 std::string CraftDefinitionShaped::getName() const
 {
        return "shaped";
@@ -427,20 +359,21 @@ std::string CraftDefinitionShaped::getName() const
 
 bool CraftDefinitionShaped::check(const CraftInput &input, IGameDef *gamedef) const
 {
-       if(input.method != CRAFT_METHOD_NORMAL)
+       if (input.method != CRAFT_METHOD_NORMAL)
                return false;
 
        // Get input item matrix
        std::vector<std::string> inp_names = craftGetItemNames(input.items, gamedef);
        unsigned int inp_width = input.width;
-       if(inp_width == 0)
+       if (inp_width == 0)
                return false;
-       while(inp_names.size() % inp_width != 0)
-               inp_names.push_back("");
+       while (inp_names.size() % inp_width != 0)
+               inp_names.emplace_back("");
 
        // Get input bounds
-       unsigned int inp_min_x=0, inp_max_x=0, inp_min_y=0, inp_max_y=0;
-       if(!craftGetBounds(inp_names, inp_width, inp_min_x, inp_max_x, inp_min_y, inp_max_y))
+       unsigned int inp_min_x = 0, inp_max_x = 0, inp_min_y = 0, inp_max_y = 0;
+       if (!craftGetBounds(inp_names, inp_width, inp_min_x, inp_max_x,
+                       inp_min_y, inp_max_y))
                return false;  // it was empty
 
        std::vector<std::string> rec_names;
@@ -451,18 +384,19 @@ bool CraftDefinitionShaped::check(const CraftInput &input, IGameDef *gamedef) co
 
        // Get recipe item matrix
        unsigned int rec_width = width;
-       if(rec_width == 0)
+       if (rec_width == 0)
                return false;
-       while(rec_names.size() % rec_width != 0)
-               rec_names.push_back("");
+       while (rec_names.size() % rec_width != 0)
+               rec_names.emplace_back("");
 
        // Get recipe bounds
        unsigned int rec_min_x=0, rec_max_x=0, rec_min_y=0, rec_max_y=0;
-       if(!craftGetBounds(rec_names, rec_width, rec_min_x, rec_max_x, rec_min_y, rec_max_y))
+       if (!craftGetBounds(rec_names, rec_width, rec_min_x, rec_max_x,
+                       rec_min_y, rec_max_y))
                return false;  // it was empty
 
        // Different sizes?
-       if(inp_max_x - inp_min_x != rec_max_x - rec_min_x ||
+       if (inp_max_x - inp_min_x != rec_max_x - rec_min_x ||
                        inp_max_y - inp_min_y != rec_max_y - rec_min_y)
                return false;
 
@@ -470,18 +404,17 @@ bool CraftDefinitionShaped::check(const CraftInput &input, IGameDef *gamedef) co
        unsigned int w = inp_max_x - inp_min_x + 1;
        unsigned int h = inp_max_y - inp_min_y + 1;
 
-       for(unsigned int y=0; y < h; y++) {
+       for (unsigned int y=0; y < h; y++) {
                unsigned int inp_y = (inp_min_y + y) * inp_width;
                unsigned int rec_y = (rec_min_y + y) * rec_width;
 
-               for(unsigned int x=0; x < w; x++) {
+               for (unsigned int x=0; x < w; x++) {
                        unsigned int inp_x = inp_min_x + x;
                        unsigned int rec_x = rec_min_x + x;
 
-                       if(!inputItemMatchesRecipe(
+                       if (!inputItemMatchesRecipe(
                                        inp_names[inp_y + inp_x],
-                                       rec_names[rec_y + rec_x], gamedef->idef())
-                       ) {
+                                       rec_names[rec_y + rec_x], gamedef->idef())) {
                                return false;
                        }
                }
@@ -500,39 +433,21 @@ CraftInput CraftDefinitionShaped::getInput(const CraftOutput &output, IGameDef *
        return CraftInput(CRAFT_METHOD_NORMAL,width,craftGetItems(recipe,gamedef));
 }
 
-void CraftDefinitionShaped::decrementInput(CraftInput &input, IGameDef *gamedef) const
+void CraftDefinitionShaped::decrementInput(CraftInput &input, std::vector<ItemStack> &output_replacements,
+        IGameDef *gamedef) const
 {
-       craftDecrementOrReplaceInput(input, replacements, gamedef);
-}
-
-CraftHashType CraftDefinitionShaped::getHashType() const
-{
-       assert(hash_inited); //pre-condition
-       bool has_group = false;
-       for (size_t i = 0; i < recipe_names.size(); i++) {
-               if (isGroupRecipeStr(recipe_names[i])) {
-                       has_group = true;
-                       break;
-               }
-       }
-       if (has_group)
-               return CRAFT_HASH_TYPE_COUNT;
-       else
-               return CRAFT_HASH_TYPE_ITEM_NAMES;
+       craftDecrementOrReplaceInput(input, output_replacements, replacements, gamedef);
 }
 
 u64 CraftDefinitionShaped::getHash(CraftHashType type) const
 {
-       assert(hash_inited); //pre-condition
-       if ((type == CRAFT_HASH_TYPE_ITEM_NAMES) || (type == CRAFT_HASH_TYPE_COUNT)) {
-               std::vector<std::string> rec_names = recipe_names;
-               std::sort(rec_names.begin(), rec_names.end());
-               return getHashForGrid(type, rec_names);
-       } else {
-               //illegal hash type for this CraftDefinition (pre-condition)
-               assert(false);
-               return 0;
-       }
+       assert(hash_inited); // Pre-condition
+       assert((type == CRAFT_HASH_TYPE_ITEM_NAMES)
+               || (type == CRAFT_HASH_TYPE_COUNT)); // Pre-condition
+
+       std::vector<std::string> rec_names = recipe_names;
+       std::sort(rec_names.begin(), rec_names.end());
+       return getHashForGrid(type, rec_names);
 }
 
 void CraftDefinitionShaped::initHash(IGameDef *gamedef)
@@ -541,44 +456,38 @@ void CraftDefinitionShaped::initHash(IGameDef *gamedef)
                return;
        hash_inited = true;
        recipe_names = craftGetItemNames(recipe, gamedef);
+
+       if (hasGroupItem(recipe_names))
+               hash_type = CRAFT_HASH_TYPE_COUNT;
+       else
+               hash_type = CRAFT_HASH_TYPE_ITEM_NAMES;
 }
 
 std::string CraftDefinitionShaped::dump() const
 {
        std::ostringstream os(std::ios::binary);
-       os<<"(shaped, output=\""<<output
-               <<"\", recipe="<<craftDumpMatrix(recipe, width)
-               <<", replacements="<<replacements.dump()<<")";
+       os << "(shaped, output=\"" << output
+               << "\", recipe=" << craftDumpMatrix(recipe, width)
+               << ", replacements=" << replacements.dump() << ")";
        return os.str();
 }
 
-void CraftDefinitionShaped::serializeBody(std::ostream &os) const
-{
-       os<<serializeString(output);
-       writeU16(os, width);
-       writeU16(os, recipe.size());
-       for(u32 i=0; i<recipe.size(); i++)
-               os<<serializeString(recipe[i]);
-       replacements.serialize(os);
-}
-
-void CraftDefinitionShaped::deSerializeBody(std::istream &is, int version)
-{
-       if(version != 1) throw SerializationError(
-                       "unsupported CraftDefinitionShaped version");
-       output = deSerializeString(is);
-       width = readU16(is);
-       recipe.clear();
-       u32 count = readU16(is);
-       for(u32 i=0; i<count; i++)
-               recipe.push_back(deSerializeString(is));
-       replacements.deSerialize(is);
-}
-
 /*
        CraftDefinitionShapeless
 */
 
+CraftDefinitionShapeless::CraftDefinitionShapeless(
+               const std::string &output_,
+               const std::vector<std::string> &recipe_,
+               const CraftReplacements &replacements_):
+       output(output_), recipe(recipe_), replacements(replacements_)
+{
+       if (hasGroupItem(recipe))
+               priority = PRIORITY_SHAPELESS_AND_GROUPS;
+       else
+               priority = PRIORITY_SHAPELESS;
+}
+
 std::string CraftDefinitionShapeless::getName() const
 {
        return "shapeless";
@@ -586,21 +495,18 @@ std::string CraftDefinitionShapeless::getName() const
 
 bool CraftDefinitionShapeless::check(const CraftInput &input, IGameDef *gamedef) const
 {
-       if(input.method != CRAFT_METHOD_NORMAL)
+       if (input.method != CRAFT_METHOD_NORMAL)
                return false;
-       
+
        // Filter empty items out of input
        std::vector<std::string> input_filtered;
-       for(std::vector<ItemStack>::const_iterator
-                       i = input.items.begin();
-                       i != input.items.end(); i++)
-       {
-               if(i->name != "")
-                       input_filtered.push_back(i->name);
+       for (const auto &item : input.items) {
+               if (!item.name.empty())
+                       input_filtered.push_back(item.name);
        }
 
        // If there is a wrong number of items in input, no match
-       if(input_filtered.size() != recipe.size()){
+       if (input_filtered.size() != recipe.size()) {
                /*dstream<<"Number of input items ("<<input_filtered.size()
                                <<") does not match recipe size ("<<recipe.size()<<") "
                                <<"of recipe with output="<<output<<std::endl;*/
@@ -622,18 +528,18 @@ bool CraftDefinitionShapeless::check(const CraftInput &input, IGameDef *gamedef)
                // If all items match, the recipe matches
                bool all_match = true;
                //dstream<<"Testing recipe (output="<<output<<"):";
-               for(size_t i=0; i<recipe.size(); i++){
+               for (size_t i=0; i<recipe.size(); i++) {
                        //dstream<<" ("<<input_filtered[i]<<" == "<<recipe_copy[i]<<")";
-                       if(!inputItemMatchesRecipe(input_filtered[i], recipe_copy[i],
-                                       gamedef->idef())){
+                       if (!inputItemMatchesRecipe(input_filtered[i], recipe_copy[i],
+                                       gamedef->idef())) {
                                all_match = false;
                                break;
                        }
                }
                //dstream<<" -> match="<<all_match<<std::endl;
-               if(all_match)
+               if (all_match)
                        return true;
-       }while(std::next_permutation(recipe_copy.begin(), recipe_copy.end()));
+       } while (std::next_permutation(recipe_copy.begin(), recipe_copy.end()));
 
        return false;
 }
@@ -645,40 +551,21 @@ CraftOutput CraftDefinitionShapeless::getOutput(const CraftInput &input, IGameDe
 
 CraftInput CraftDefinitionShapeless::getInput(const CraftOutput &output, IGameDef *gamedef) const
 {
-       return CraftInput(CRAFT_METHOD_NORMAL,0,craftGetItems(recipe,gamedef));
-}
-
-void CraftDefinitionShapeless::decrementInput(CraftInput &input, IGameDef *gamedef) const
-{
-       craftDecrementOrReplaceInput(input, replacements, gamedef);
+       return CraftInput(CRAFT_METHOD_NORMAL, 0, craftGetItems(recipe, gamedef));
 }
 
-CraftHashType CraftDefinitionShapeless::getHashType() const
+void CraftDefinitionShapeless::decrementInput(CraftInput &input, std::vector<ItemStack> &output_replacements,
+       IGameDef *gamedef) const
 {
-       assert(hash_inited); //pre-condition
-       bool has_group = false;
-       for (size_t i = 0; i < recipe_names.size(); i++) {
-               if (isGroupRecipeStr(recipe_names[i])) {
-                       has_group = true;
-                       break;
-               }
-       }
-       if (has_group)
-               return CRAFT_HASH_TYPE_COUNT;
-       else
-               return CRAFT_HASH_TYPE_ITEM_NAMES;
+       craftDecrementOrReplaceInput(input, output_replacements, replacements, gamedef);
 }
 
 u64 CraftDefinitionShapeless::getHash(CraftHashType type) const
 {
-       assert(hash_inited); //pre-condition
-       if (type == CRAFT_HASH_TYPE_ITEM_NAMES || type == CRAFT_HASH_TYPE_COUNT) {
-               return getHashForGrid(type, recipe_names);
-       } else {
-               //illegal hash type for this CraftDefinition (pre-condition)
-               assert(false);
-               return 0;
-       }
+       assert(hash_inited); // Pre-condition
+       assert(type == CRAFT_HASH_TYPE_ITEM_NAMES
+               || type == CRAFT_HASH_TYPE_COUNT); // Pre-condition
+       return getHashForGrid(type, recipe_names);
 }
 
 void CraftDefinitionShapeless::initHash(IGameDef *gamedef)
@@ -688,42 +575,32 @@ void CraftDefinitionShapeless::initHash(IGameDef *gamedef)
        hash_inited = true;
        recipe_names = craftGetItemNames(recipe, gamedef);
        std::sort(recipe_names.begin(), recipe_names.end());
+
+       if (hasGroupItem(recipe_names))
+               hash_type = CRAFT_HASH_TYPE_COUNT;
+       else
+               hash_type = CRAFT_HASH_TYPE_ITEM_NAMES;
 }
 
 std::string CraftDefinitionShapeless::dump() const
 {
        std::ostringstream os(std::ios::binary);
-       os<<"(shapeless, output=\""<<output
-               <<"\", recipe="<<craftDumpMatrix(recipe, recipe.size())
-               <<", replacements="<<replacements.dump()<<")";
+       os << "(shapeless, output=\"" << output
+               << "\", recipe=" << craftDumpMatrix(recipe, recipe.size())
+               << ", replacements=" << replacements.dump() << ")";
        return os.str();
 }
 
-void CraftDefinitionShapeless::serializeBody(std::ostream &os) const
-{
-       os<<serializeString(output);
-       writeU16(os, recipe.size());
-       for(u32 i=0; i<recipe.size(); i++)
-               os<<serializeString(recipe[i]);
-       replacements.serialize(os);
-}
-
-void CraftDefinitionShapeless::deSerializeBody(std::istream &is, int version)
-{
-       if(version != 1) throw SerializationError(
-                       "unsupported CraftDefinitionShapeless version");
-       output = deSerializeString(is);
-       recipe.clear();
-       u32 count = readU16(is);
-       for(u32 i=0; i<count; i++)
-               recipe.push_back(deSerializeString(is));
-       replacements.deSerialize(is);
-}
-
 /*
        CraftDefinitionToolRepair
 */
 
+CraftDefinitionToolRepair::CraftDefinitionToolRepair(float additional_wear_):
+       additional_wear(additional_wear_)
+{
+       priority = PRIORITY_TOOLREPAIR;
+}
+
 static ItemStack craftToolRepair(
                const ItemStack &item1,
                const ItemStack &item2,
@@ -731,10 +608,9 @@ static ItemStack craftToolRepair(
                IGameDef *gamedef)
 {
        IItemDefManager *idef = gamedef->idef();
-       if(item1.count != 1 || item2.count != 1 || item1.name != item2.name
+       if (item1.count != 1 || item2.count != 1 || item1.name != item2.name
                        || idef->get(item1.name).type != ITEM_TOOL
-                       || idef->get(item2.name).type != ITEM_TOOL)
-       {
+                       || itemgroup_get(idef->get(item1.name).groups, "disable_repair") == 1) {
                // Failure
                return ItemStack();
        }
@@ -743,9 +619,9 @@ static ItemStack craftToolRepair(
        s32 item2_uses = 65536 - (u32) item2.wear;
        s32 new_uses = item1_uses + item2_uses;
        s32 new_wear = 65536 - new_uses + floor(additional_wear * 65536 + 0.5);
-       if(new_wear >= 65536)
+       if (new_wear >= 65536)
                return ItemStack();
-       if(new_wear < 0)
+       if (new_wear < 0)
                new_wear = 0;
 
        ItemStack repaired = item1;
@@ -760,21 +636,17 @@ std::string CraftDefinitionToolRepair::getName() const
 
 bool CraftDefinitionToolRepair::check(const CraftInput &input, IGameDef *gamedef) const
 {
-       if(input.method != CRAFT_METHOD_NORMAL)
+       if (input.method != CRAFT_METHOD_NORMAL)
                return false;
 
        ItemStack item1;
        ItemStack item2;
-       for(std::vector<ItemStack>::const_iterator
-                       i = input.items.begin();
-                       i != input.items.end(); i++)
-       {
-               if(!i->empty())
-               {
-                       if(item1.empty())
-                               item1 = *i;
-                       else if(item2.empty())
-                               item2 = *i;
+       for (const auto &item : input.items) {
+               if (!item.empty()) {
+                       if (item1.empty())
+                               item1 = item;
+                       else if (item2.empty())
+                               item2 = item;
                        else
                                return false;
                }
@@ -787,16 +659,12 @@ CraftOutput CraftDefinitionToolRepair::getOutput(const CraftInput &input, IGameD
 {
        ItemStack item1;
        ItemStack item2;
-       for(std::vector<ItemStack>::const_iterator
-                       i = input.items.begin();
-                       i != input.items.end(); i++)
-       {
-               if(!i->empty())
-               {
-                       if(item1.empty())
-                               item1 = *i;
-                       else if(item2.empty())
-                               item2 = *i;
+       for (const auto &item : input.items) {
+               if (!item.empty()) {
+                       if (item1.empty())
+                               item1 = item;
+                       else if (item2.empty())
+                               item2 = item;
                }
        }
        ItemStack repaired = craftToolRepair(item1, item2, additional_wear, gamedef);
@@ -806,11 +674,12 @@ CraftOutput CraftDefinitionToolRepair::getOutput(const CraftInput &input, IGameD
 CraftInput CraftDefinitionToolRepair::getInput(const CraftOutput &output, IGameDef *gamedef) const
 {
        std::vector<ItemStack> stack;
-       stack.push_back(ItemStack());
-       return CraftInput(CRAFT_METHOD_COOKING,additional_wear,stack);
+       stack.emplace_back();
+       return CraftInput(CRAFT_METHOD_COOKING, additional_wear, stack);
 }
 
-void CraftDefinitionToolRepair::decrementInput(CraftInput &input, IGameDef *gamedef) const
+void CraftDefinitionToolRepair::decrementInput(CraftInput &input, std::vector<ItemStack> &output_replacements,
+       IGameDef *gamedef) const
 {
        craftDecrementInput(input, gamedef);
 }
@@ -818,26 +687,27 @@ void CraftDefinitionToolRepair::decrementInput(CraftInput &input, IGameDef *game
 std::string CraftDefinitionToolRepair::dump() const
 {
        std::ostringstream os(std::ios::binary);
-       os<<"(toolrepair, additional_wear="<<additional_wear<<")";
+       os << "(toolrepair, additional_wear=" << additional_wear << ")";
        return os.str();
 }
 
-void CraftDefinitionToolRepair::serializeBody(std::ostream &os) const
-{
-       writeF1000(os, additional_wear);
-}
-
-void CraftDefinitionToolRepair::deSerializeBody(std::istream &is, int version)
-{
-       if(version != 1) throw SerializationError(
-                       "unsupported CraftDefinitionToolRepair version");
-       additional_wear = readF1000(is);
-}
-
 /*
        CraftDefinitionCooking
 */
 
+CraftDefinitionCooking::CraftDefinitionCooking(
+               const std::string &output_,
+               const std::string &recipe_,
+               float cooktime_,
+               const CraftReplacements &replacements_):
+       output(output_), recipe(recipe_), cooktime(cooktime_), replacements(replacements_)
+{
+       if (isGroupRecipeStr(recipe))
+               priority = PRIORITY_SHAPELESS_AND_GROUPS;
+       else
+               priority = PRIORITY_SHAPELESS;
+}
+
 std::string CraftDefinitionCooking::getName() const
 {
        return "cooking";
@@ -845,29 +715,28 @@ std::string CraftDefinitionCooking::getName() const
 
 bool CraftDefinitionCooking::check(const CraftInput &input, IGameDef *gamedef) const
 {
-       if(input.method != CRAFT_METHOD_COOKING)
+       if (input.method != CRAFT_METHOD_COOKING)
                return false;
 
        // Filter empty items out of input
        std::vector<std::string> input_filtered;
-       for(std::vector<ItemStack>::const_iterator
-                       i = input.items.begin();
-                       i != input.items.end(); i++)
-       {
-               if(i->name != "")
-                       input_filtered.push_back(i->name);
+       for (const auto &item : input.items) {
+               const std::string &name = item.name;
+               if (!name.empty())
+                       input_filtered.push_back(name);
        }
 
        // If there is a wrong number of items in input, no match
-       if(input_filtered.size() != 1){
+       if (input_filtered.size() != 1) {
                /*dstream<<"Number of input items ("<<input_filtered.size()
                                <<") does not match recipe size (1) "
                                <<"of cooking recipe with output="<<output<<std::endl;*/
                return false;
        }
-       
+
        // Check the single input item
-       return inputItemMatchesRecipe(input_filtered[0], recipe, gamedef->idef());
+       std::string rec_name = craftGetItemName(recipe, gamedef);
+       return inputItemMatchesRecipe(input_filtered[0], rec_name, gamedef->idef());
 }
 
 CraftOutput CraftDefinitionCooking::getOutput(const CraftInput &input, IGameDef *gamedef) const
@@ -882,30 +751,25 @@ CraftInput CraftDefinitionCooking::getInput(const CraftOutput &output, IGameDef
        return CraftInput(CRAFT_METHOD_COOKING,cooktime,craftGetItems(rec,gamedef));
 }
 
-void CraftDefinitionCooking::decrementInput(CraftInput &input, IGameDef *gamedef) const
+void CraftDefinitionCooking::decrementInput(CraftInput &input, std::vector<ItemStack> &output_replacements,
+       IGameDef *gamedef) const
 {
-       craftDecrementOrReplaceInput(input, replacements, gamedef);
-}
-
-CraftHashType CraftDefinitionCooking::getHashType() const
-{
-       if (isGroupRecipeStr(recipe_name))
-               return CRAFT_HASH_TYPE_COUNT;
-       else
-               return CRAFT_HASH_TYPE_ITEM_NAMES;
+       craftDecrementOrReplaceInput(input, output_replacements, replacements, gamedef);
 }
 
 u64 CraftDefinitionCooking::getHash(CraftHashType type) const
 {
        if (type == CRAFT_HASH_TYPE_ITEM_NAMES) {
                return getHashForString(recipe_name);
-       } else if (type == CRAFT_HASH_TYPE_COUNT) {
+       }
+
+       if (type == CRAFT_HASH_TYPE_COUNT) {
                return 1;
-       } else {
-               //illegal hash type for this CraftDefinition (pre-condition)
-               assert(false);
-               return 0;
        }
+
+       // illegal hash type for this CraftDefinition (pre-condition)
+       assert(false);
+       return 0;
 }
 
 void CraftDefinitionCooking::initHash(IGameDef *gamedef)
@@ -914,40 +778,39 @@ void CraftDefinitionCooking::initHash(IGameDef *gamedef)
                return;
        hash_inited = true;
        recipe_name = craftGetItemName(recipe, gamedef);
+
+       if (isGroupRecipeStr(recipe_name))
+               hash_type = CRAFT_HASH_TYPE_COUNT;
+       else
+               hash_type = CRAFT_HASH_TYPE_ITEM_NAMES;
 }
 
 std::string CraftDefinitionCooking::dump() const
 {
        std::ostringstream os(std::ios::binary);
-       os<<"(cooking, output=\""<<output
-               <<"\", recipe=\""<<recipe
-               <<"\", cooktime="<<cooktime<<")"
-               <<", replacements="<<replacements.dump()<<")";
+       os << "(cooking, output=\"" << output
+               << "\", recipe=\"" << recipe
+               << "\", cooktime=" << cooktime << ")"
+               << ", replacements=" << replacements.dump() << ")";
        return os.str();
 }
 
-void CraftDefinitionCooking::serializeBody(std::ostream &os) const
-{
-       os<<serializeString(output);
-       os<<serializeString(recipe);
-       writeF1000(os, cooktime);
-       replacements.serialize(os);
-}
-
-void CraftDefinitionCooking::deSerializeBody(std::istream &is, int version)
-{
-       if(version != 1) throw SerializationError(
-                       "unsupported CraftDefinitionCooking version");
-       output = deSerializeString(is);
-       recipe = deSerializeString(is);
-       cooktime = readF1000(is);
-       replacements.deSerialize(is);
-}
-
 /*
        CraftDefinitionFuel
 */
 
+CraftDefinitionFuel::CraftDefinitionFuel(
+               const std::string &recipe_,
+               float burntime_,
+               const CraftReplacements &replacements_):
+       recipe(recipe_), burntime(burntime_), replacements(replacements_)
+{
+       if (isGroupRecipeStr(recipe_name))
+               priority = PRIORITY_SHAPELESS_AND_GROUPS;
+       else
+               priority = PRIORITY_SHAPELESS;
+}
+
 std::string CraftDefinitionFuel::getName() const
 {
        return "fuel";
@@ -955,29 +818,28 @@ std::string CraftDefinitionFuel::getName() const
 
 bool CraftDefinitionFuel::check(const CraftInput &input, IGameDef *gamedef) const
 {
-       if(input.method != CRAFT_METHOD_FUEL)
+       if (input.method != CRAFT_METHOD_FUEL)
                return false;
 
        // Filter empty items out of input
        std::vector<std::string> input_filtered;
-       for(std::vector<ItemStack>::const_iterator
-                       i = input.items.begin();
-                       i != input.items.end(); i++)
-       {
-               if(i->name != "")
-                       input_filtered.push_back(i->name);
+       for (const auto &item : input.items) {
+               const std::string &name = item.name;
+               if (!name.empty())
+                       input_filtered.push_back(name);
        }
 
        // If there is a wrong number of items in input, no match
-       if(input_filtered.size() != 1){
+       if (input_filtered.size() != 1) {
                /*dstream<<"Number of input items ("<<input_filtered.size()
                                <<") does not match recipe size (1) "
                                <<"of fuel recipe with burntime="<<burntime<<std::endl;*/
                return false;
        }
-       
+
        // Check the single input item
-       return inputItemMatchesRecipe(input_filtered[0], recipe, gamedef->idef());
+       std::string rec_name = craftGetItemName(recipe, gamedef);
+       return inputItemMatchesRecipe(input_filtered[0], rec_name, gamedef->idef());
 }
 
 CraftOutput CraftDefinitionFuel::getOutput(const CraftInput &input, IGameDef *gamedef) const
@@ -992,30 +854,25 @@ CraftInput CraftDefinitionFuel::getInput(const CraftOutput &output, IGameDef *ga
        return CraftInput(CRAFT_METHOD_COOKING,(int)burntime,craftGetItems(rec,gamedef));
 }
 
-void CraftDefinitionFuel::decrementInput(CraftInput &input, IGameDef *gamedef) const
-{
-       craftDecrementOrReplaceInput(input, replacements, gamedef);
-}
-
-CraftHashType CraftDefinitionFuel::getHashType() const
+void CraftDefinitionFuel::decrementInput(CraftInput &input, std::vector<ItemStack> &output_replacements,
+       IGameDef *gamedef) const
 {
-       if (isGroupRecipeStr(recipe_name))
-               return CRAFT_HASH_TYPE_COUNT;
-       else
-               return CRAFT_HASH_TYPE_ITEM_NAMES;
+       craftDecrementOrReplaceInput(input, output_replacements, replacements, gamedef);
 }
 
 u64 CraftDefinitionFuel::getHash(CraftHashType type) const
 {
        if (type == CRAFT_HASH_TYPE_ITEM_NAMES) {
                return getHashForString(recipe_name);
-       } else if (type == CRAFT_HASH_TYPE_COUNT) {
+       }
+
+       if (type == CRAFT_HASH_TYPE_COUNT) {
                return 1;
-       } else {
-               //illegal hash type for this CraftDefinition (pre-condition)
-               assert(false);
-               return 0;
        }
+
+       // illegal hash type for this CraftDefinition (pre-condition)
+       assert(false);
+       return 0;
 }
 
 void CraftDefinitionFuel::initHash(IGameDef *gamedef)
@@ -1024,32 +881,22 @@ void CraftDefinitionFuel::initHash(IGameDef *gamedef)
                return;
        hash_inited = true;
        recipe_name = craftGetItemName(recipe, gamedef);
+
+       if (isGroupRecipeStr(recipe_name))
+               hash_type = CRAFT_HASH_TYPE_COUNT;
+       else
+               hash_type = CRAFT_HASH_TYPE_ITEM_NAMES;
 }
+
 std::string CraftDefinitionFuel::dump() const
 {
        std::ostringstream os(std::ios::binary);
-       os<<"(fuel, recipe=\""<<recipe
-               <<"\", burntime="<<burntime<<")"
-               <<", replacements="<<replacements.dump()<<")";
+       os << "(fuel, recipe=\"" << recipe
+               << "\", burntime=" << burntime << ")"
+               << ", replacements=" << replacements.dump() << ")";
        return os.str();
 }
 
-void CraftDefinitionFuel::serializeBody(std::ostream &os) const
-{
-       os<<serializeString(recipe);
-       writeF1000(os, burntime);
-       replacements.serialize(os);
-}
-
-void CraftDefinitionFuel::deSerializeBody(std::istream &is, int version)
-{
-       if(version != 1) throw SerializationError(
-                       "unsupported CraftDefinitionFuel version");
-       recipe = deSerializeString(is);
-       burntime = readF1000(is);
-       replacements.deSerialize(is);
-}
-
 /*
        Craft definition manager
 */
@@ -1068,29 +915,21 @@ class CCraftDefManager: public IWritableCraftDefManager
        }
 
        virtual bool getCraftResult(CraftInput &input, CraftOutput &output,
-                       bool decrementInput, IGameDef *gamedef) const
+                       std::vector<ItemStack> &output_replacement, bool decrementInput,
+                       IGameDef *gamedef) const
        {
-               output.item = "";
-               output.time = 0;
-
-               // If all input items are empty, abort.
-               bool all_empty = true;
-               for (std::vector<ItemStack>::const_iterator
-                               i = input.items.begin();
-                               i != input.items.end(); i++) {
-                       if (!i->empty()) {
-                               all_empty = false;
-                               break;
-                       }
-               }
-               if (all_empty)
+               if (input.empty())
                        return false;
 
                std::vector<std::string> input_names;
                input_names = craftGetItemNames(input.items, gamedef);
                std::sort(input_names.begin(), input_names.end());
 
-               // Try hash types with increasing collision rate, and return if found.
+               // Try hash types with increasing collision rate
+               // while remembering the latest, highest priority recipe.
+               CraftDefinition::RecipePriority priority_best =
+                       CraftDefinition::PRIORITY_NO_RECIPE;
+               CraftDefinition *def_best = nullptr;
                for (int type = 0; type <= craft_hash_type_max; type++) {
                        u64 hash = getHashForGrid((CraftHashType) type, input_names);
 
@@ -1098,8 +937,7 @@ class CCraftDefManager: public IWritableCraftDefManager
 
                        // We'd like to do "const [...] hash_collisions = m_craft_defs[type][hash];"
                        // but that doesn't compile for some reason. This does.
-                       std::map<u64, std::vector<CraftDefinition*> >::const_iterator
-                               col_iter = (m_craft_defs[type]).find(hash);
+                       auto col_iter = (m_craft_defs[type]).find(hash);
 
                        if (col_iter == (m_craft_defs[type]).end())
                                continue;
@@ -1107,25 +945,37 @@ class CCraftDefManager: public IWritableCraftDefManager
                        const std::vector<CraftDefinition*> &hash_collisions = col_iter->second;
                        // Walk crafting definitions from back to front, so that later
                        // definitions can override earlier ones.
-                       for (std::vector<CraftDefinition*>::const_reverse_iterator
-                                       i = hash_collisions.rbegin();
-                                       i != hash_collisions.rend(); i++) {
-                               CraftDefinition *def = *i;
+                       for (std::vector<CraftDefinition*>::size_type
+                                       i = hash_collisions.size(); i > 0; i--) {
+                               CraftDefinition *def = hash_collisions[i - 1];
 
                                /*errorstream << "Checking " << input.dump() << std::endl
                                        << " against " << def->dump() << std::endl;*/
 
-                               if (def->check(input, gamedef)) {
-                                       // Get output, then decrement input (if requested)
-                                       output = def->getOutput(input, gamedef);
-                                       if (decrementInput)
-                                               def->decrementInput(input, gamedef);
-                                       /*errorstream << "Check RETURNS TRUE" << std::endl;*/
-                                       return true;
+                               CraftDefinition::RecipePriority priority = def->getPriority();
+                               if (priority > priority_best
+                                               && def->check(input, gamedef)) {
+                                       // Check if the crafted node/item exists
+                                       CraftOutput out = def->getOutput(input, gamedef);
+                                       ItemStack is;
+                                       is.deSerialize(out.item, gamedef->idef());
+                                       if (!is.isKnown(gamedef->idef())) {
+                                               infostream << "trying to craft non-existent "
+                                                       << out.item << ", ignoring recipe" << std::endl;
+                                               continue;
+                                       }
+
+                                       output = out;
+                                       priority_best = priority;
+                                       def_best = def;
                                }
                        }
                }
-               return false;
+               if (priority_best == CraftDefinition::PRIORITY_NO_RECIPE)
+                       return false;
+               if (decrementInput)
+                       def_best->decrementInput(input, output_replacement, gamedef);
+               return true;
        }
 
        virtual std::vector<CraftDefinition*> getCraftRecipes(CraftOutput &output,
@@ -1133,8 +983,7 @@ class CCraftDefManager: public IWritableCraftDefManager
        {
                std::vector<CraftDefinition*> recipes;
 
-               std::map<std::string, std::vector<CraftDefinition*> >::const_iterator
-                       vec_iter = m_output_craft_definitions.find(output.item);
+               auto vec_iter = m_output_craft_definitions.find(output.item);
 
                if (vec_iter == m_output_craft_definitions.end())
                        return recipes;
@@ -1143,26 +992,81 @@ class CCraftDefManager: public IWritableCraftDefManager
 
                recipes.reserve(limit ? MYMIN(limit, vec.size()) : vec.size());
 
-               for (std::vector<CraftDefinition*>::const_reverse_iterator
-                               it = vec.rbegin(); it != vec.rend(); ++it) {
+               for (std::vector<CraftDefinition*>::size_type i = vec.size();
+                               i > 0; i--) {
+                       CraftDefinition *def = vec[i - 1];
                        if (limit && recipes.size() >= limit)
                                break;
-                       recipes.push_back(*it);
+                       recipes.push_back(def);
                }
 
                return recipes;
        }
+
+       virtual bool clearCraftsByOutput(const CraftOutput &output, IGameDef *gamedef)
+       {
+               auto to_clear = m_output_craft_definitions.find(output.item);
+
+               if (to_clear == m_output_craft_definitions.end())
+                       return false;
+
+               for (auto def : to_clear->second) {
+                       // Recipes are not yet hashed at this point
+                       std::vector<CraftDefinition *> &defs = m_craft_defs[(int)CRAFT_HASH_TYPE_UNHASHED][0];
+                       defs.erase(std::remove(defs.begin(), defs.end(), def), defs.end());
+                       delete def;
+               }
+               m_output_craft_definitions.erase(to_clear);
+               return true;
+       }
+
+       virtual bool clearCraftsByInput(const CraftInput &input, IGameDef *gamedef)
+       {
+               if (input.empty())
+                       return false;
+
+               // Recipes are not yet hashed at this point
+               std::vector<CraftDefinition *> &defs = m_craft_defs[(int)CRAFT_HASH_TYPE_UNHASHED][0];
+               std::unordered_set<const CraftDefinition *> defs_to_remove;
+               std::vector<CraftDefinition *> new_defs;
+
+               for (auto def : defs) {
+                       if (def->check(input, gamedef))
+                               defs_to_remove.insert(def);
+                       else
+                               new_defs.push_back(def);
+               }
+
+               if (!defs_to_remove.empty()) {
+                       for (auto def : defs_to_remove)
+                               delete def;
+
+                       defs.swap(new_defs);
+
+                       for (auto &output : m_output_craft_definitions) {
+                               std::vector<CraftDefinition *> &outdefs = output.second;
+                               outdefs.erase(std::remove_if(outdefs.begin(), outdefs.end(), [&](const CraftDefinition* def) {
+                                       return defs_to_remove.find(def) != defs_to_remove.end();
+                               }), outdefs.end());
+                       }
+               }
+
+               return !defs_to_remove.empty();
+       }
+
        virtual std::string dump() const
        {
                std::ostringstream os(std::ios::binary);
                os << "Crafting definitions:\n";
-               for (int type = 0; type <= craft_hash_type_max; type++) {
-                       for (std::map<u64, std::vector<CraftDefinition*> >::const_iterator
-                                       i = (m_craft_defs[type]).begin();
-                                       i != (m_craft_defs[type]).end(); i++) {
-                               for (std::vector<CraftDefinition*>::const_iterator
-                                               ii = i->second.begin(); ii != i->second.end(); ii++) {
-                                       os << "type " << type << " hash " << i->first << (*ii)->dump() << "\n";
+               for (int type = 0; type <= craft_hash_type_max; ++type) {
+                       for (auto it = m_craft_defs[type].begin();
+                                       it != m_craft_defs[type].end(); ++it) {
+                               for (std::vector<CraftDefinition*>::size_type i = 0;
+                                               i < it->second.size(); i++) {
+                                       os << "type " << type
+                                               << " hash " << it->first
+                                               << " def " << it->second[i]->dump()
+                                               << "\n";
                                }
                        }
                }
@@ -1170,8 +1074,8 @@ class CCraftDefManager: public IWritableCraftDefManager
        }
        virtual void registerCraft(CraftDefinition *def, IGameDef *gamedef)
        {
-               verbosestream<<"registerCraft: registering craft definition: "
-                               <<def->dump()<<std::endl;
+               TRACESTREAM(<< "registerCraft: registering craft definition: "
+                               << def->dump() << std::endl);
                m_craft_defs[(int) CRAFT_HASH_TYPE_UNHASHED][0].push_back(def);
 
                CraftInput input;
@@ -1181,15 +1085,12 @@ class CCraftDefManager: public IWritableCraftDefManager
        }
        virtual void clear()
        {
-               for (int type = 0; type <= craft_hash_type_max; type++) {
-                       for (std::map<u64, std::vector<CraftDefinition*> >::iterator
-                                       i = m_craft_defs[type].begin();
-                                       i != m_craft_defs[type].end(); i++) {
-                               for (std::vector<CraftDefinition*>::iterator
-                                               ii = i->second.begin(); ii != i->second.end(); ii++) {
-                                       delete *ii;
+               for (int type = 0; type <= craft_hash_type_max; ++type) {
+                       for (auto &it : m_craft_defs[type]) {
+                               for (auto &iit : it.second) {
+                                       delete iit;
                                }
-                               i->second.clear();
+                               it.second.clear();
                        }
                        m_craft_defs[type].clear();
                }
@@ -1198,11 +1099,9 @@ class CCraftDefManager: public IWritableCraftDefManager
        virtual void initHashes(IGameDef *gamedef)
        {
                // Move the CraftDefs from the unhashed layer into layers higher up.
-               for (std::vector<CraftDefinition*>::iterator
-                       i = (m_craft_defs[(int) CRAFT_HASH_TYPE_UNHASHED][0]).begin();
-                       i != (m_craft_defs[(int) CRAFT_HASH_TYPE_UNHASHED][0]).end(); i++) {
-                       CraftDefinition *def = *i;
-
+               std::vector<CraftDefinition *> &unhashed =
+                       m_craft_defs[(int) CRAFT_HASH_TYPE_UNHASHED][0];
+               for (auto def : unhashed) {
                        // Initialize and get the definition's hash
                        def->initHash(gamedef);
                        CraftHashType type = def->getHashType();
@@ -1211,16 +1110,16 @@ class CCraftDefManager: public IWritableCraftDefManager
                        // Enter the definition
                        m_craft_defs[type][hash].push_back(def);
                }
-               m_craft_defs[(int) CRAFT_HASH_TYPE_UNHASHED][0].clear();
+               unhashed.clear();
        }
 private:
-       //TODO: change both maps to unordered_map when c++11 can be used
-       std::vector<std::map<u64, std::vector<CraftDefinition*> > > m_craft_defs;
-       std::map<std::string, std::vector<CraftDefinition*> > m_output_craft_definitions;
+       std::vector<std::unordered_map<u64, std::vector<CraftDefinition*> > >
+               m_craft_defs;
+       std::unordered_map<std::string, std::vector<CraftDefinition*> >
+               m_output_craft_definitions;
 };
 
 IWritableCraftDefManager* createCraftDefManager()
 {
        return new CCraftDefManager();
 }
-