newgrf_industries.cpp

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00001 /* $Id: newgrf_industries.cpp 23474 2011-12-10 13:54:10Z rubidium $ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
00008  */
00009 
00012 #include "stdafx.h"
00013 #include "debug.h"
00014 #include "industry.h"
00015 #include "newgrf.h"
00016 #include "newgrf_industries.h"
00017 #include "newgrf_text.h"
00018 #include "newgrf_town.h"
00019 #include "newgrf_cargo.h"
00020 #include "window_func.h"
00021 #include "town.h"
00022 #include "company_base.h"
00023 #include "command_func.h"
00024 #include "error.h"
00025 #include "strings_func.h"
00026 #include "core/random_func.hpp"
00027 
00028 #include "table/strings.h"
00029 
00030 static uint32 _industry_creation_random_bits;
00031 
00032 /* Since the industry IDs defined by the GRF file don't necessarily correlate
00033  * to those used by the game, the IDs used for overriding old industries must be
00034  * translated when the idustry spec is set. */
00035 IndustryOverrideManager _industry_mngr(NEW_INDUSTRYOFFSET, NUM_INDUSTRYTYPES, INVALID_INDUSTRYTYPE);
00036 IndustryTileOverrideManager _industile_mngr(NEW_INDUSTRYTILEOFFSET, NUM_INDUSTRYTILES, INVALID_INDUSTRYTILE);
00037 
00044 IndustryType MapNewGRFIndustryType(IndustryType grf_type, uint32 grf_id)
00045 {
00046   if (grf_type == IT_INVALID) return IT_INVALID;
00047   if (!HasBit(grf_type, 7)) return GB(grf_type, 0, 6);
00048 
00049   return _industry_mngr.GetID(GB(grf_type, 0, 6), grf_id);
00050 }
00051 
00060 uint32 GetIndustryIDAtOffset(TileIndex tile, const Industry *i, uint32 cur_grfid)
00061 {
00062   if (!IsTileType(tile, MP_INDUSTRY) || GetIndustryIndex(tile) != i->index) {
00063     /* No industry and/or the tile does not have the same industry as the one we match it with */
00064     return 0xFFFF;
00065   }
00066 
00067   IndustryGfx gfx = GetCleanIndustryGfx(tile);
00068   const IndustryTileSpec *indtsp = GetIndustryTileSpec(gfx);
00069 
00070   if (gfx < NEW_INDUSTRYTILEOFFSET) { // Does it belongs to an old type?
00071     /* It is an old tile.  We have to see if it's been overriden */
00072     if (indtsp->grf_prop.override == INVALID_INDUSTRYTILE) { // has it been overridden?
00073       return 0xFF << 8 | gfx; // no. Tag FF + the gfx id of that tile
00074     }
00075     /* Overriden */
00076     const IndustryTileSpec *tile_ovr = GetIndustryTileSpec(indtsp->grf_prop.override);
00077 
00078     if (tile_ovr->grf_prop.grffile->grfid == cur_grfid) {
00079       return tile_ovr->grf_prop.local_id; // same grf file
00080     } else {
00081       return 0xFFFE; // not the same grf file
00082     }
00083   }
00084   /* Not an 'old type' tile */
00085   if (indtsp->grf_prop.spritegroup[0] != NULL) { // tile has a spritegroup ?
00086     if (indtsp->grf_prop.grffile->grfid == cur_grfid) { // same industry, same grf ?
00087       return indtsp->grf_prop.local_id;
00088     } else {
00089       return 0xFFFE; // Defined in another grf file
00090     }
00091   }
00092   /* The tile has no spritegroup */
00093   return 0xFF << 8 | indtsp->grf_prop.subst_id; // so just give him the substitute
00094 }
00095 
00096 static uint32 GetClosestIndustry(TileIndex tile, IndustryType type, const Industry *current)
00097 {
00098   uint32 best_dist = UINT32_MAX;
00099   const Industry *i;
00100   FOR_ALL_INDUSTRIES(i) {
00101     if (i->type != type || i == current) continue;
00102 
00103     best_dist = min(best_dist, DistanceManhattan(tile, i->location.tile));
00104   }
00105 
00106   return best_dist;
00107 }
00108 
00119 static uint32 GetCountAndDistanceOfClosestInstance(byte param_setID, byte layout_filter, bool town_filter, const Industry *current)
00120 {
00121   uint32 GrfID = GetRegister(0x100);  
00122   IndustryType ind_index;
00123   uint32 closest_dist = UINT32_MAX;
00124   byte count = 0;
00125 
00126   /* Determine what will be the industry type to look for */
00127   switch (GrfID) {
00128     case 0:  // this is a default industry type
00129       ind_index = param_setID;
00130       break;
00131 
00132     case 0xFFFFFFFF: // current grf
00133       GrfID = GetIndustrySpec(current->type)->grf_prop.grffile->grfid;
00134       /* FALL THROUGH */
00135 
00136     default: // use the grfid specified in register 100h
00137       SetBit(param_setID, 7); // bit 7 means it is not an old type
00138       ind_index = MapNewGRFIndustryType(param_setID, GrfID);
00139       break;
00140   }
00141 
00142   /* If the industry type is invalid, there is none and the closest is far away. */
00143   if (ind_index >= NUM_INDUSTRYTYPES) return 0 | 0xFFFF;
00144 
00145   if (layout_filter == 0 && !town_filter) {
00146     /* If the filter is 0, it could be because none was specified as well as being really a 0.
00147      * In either case, just do the regular var67 */
00148     closest_dist = GetClosestIndustry(current->location.tile, ind_index, current);
00149     count = min(Industry::GetIndustryTypeCount(ind_index), UINT8_MAX); // clamp to 8 bit
00150   } else {
00151     /* Count only those who match the same industry type and layout filter
00152      * Unfortunately, we have to do it manually */
00153     const Industry *i;
00154     FOR_ALL_INDUSTRIES(i) {
00155       if (i->type == ind_index && i != current && (i->selected_layout == layout_filter || layout_filter == 0) && (!town_filter || i->town == current->town)) {
00156         closest_dist = min(closest_dist, DistanceManhattan(current->location.tile, i->location.tile));
00157         count++;
00158       }
00159     }
00160   }
00161 
00162   return count << 16 | GB(closest_dist, 0, 16);
00163 }
00164 
00173 uint32 IndustryGetVariable(const ResolverObject *object, byte variable, uint32 parameter, bool *available)
00174 {
00175   const Industry *industry = object->u.industry.ind;
00176   TileIndex tile = object->u.industry.tile;
00177   IndustryType type = object->u.industry.type;
00178   const IndustrySpec *indspec = GetIndustrySpec(type);
00179 
00180   /* Shall the variable get resolved in parent scope and are we not yet in parent scope? */
00181   if (object->u.industry.gfx == INVALID_INDUSTRYTILE && object->scope == VSG_SCOPE_PARENT) {
00182     /* Pass the request on to the town of the industry */
00183     Town *t;
00184 
00185     if (industry != NULL) {
00186       t = industry->town;
00187     } else if (tile != INVALID_TILE) {
00188       t = ClosestTownFromTile(tile, UINT_MAX);
00189     } else {
00190       *available = false;
00191       return UINT_MAX;
00192     }
00193 
00194     return TownGetVariable(variable, parameter, available, t, object->grffile);
00195   }
00196 
00197   if (industry == NULL) {
00198     DEBUG(grf, 1, "Unhandled variable 0x%X (no available industry) in callback 0x%x", variable, object->callback);
00199 
00200     *available = false;
00201     return UINT_MAX;
00202   }
00203 
00204   switch (variable) {
00205     case 0x40:
00206     case 0x41:
00207     case 0x42: { // waiting cargo, but only if those two callback flags are set
00208       uint16 callback = indspec->callback_mask;
00209       if (HasBit(callback, CBM_IND_PRODUCTION_CARGO_ARRIVAL) || HasBit(callback, CBM_IND_PRODUCTION_256_TICKS)) {
00210         if ((indspec->behaviour & INDUSTRYBEH_PROD_MULTI_HNDLING) != 0) {
00211           if (industry->prod_level == 0) return 0;
00212           return min(industry->incoming_cargo_waiting[variable - 0x40] / industry->prod_level, (uint16)0xFFFF);
00213         } else {
00214           return min(industry->incoming_cargo_waiting[variable - 0x40], (uint16)0xFFFF);
00215         }
00216       } else {
00217         return 0;
00218       }
00219     }
00220 
00221     /* Manhattan distance of closes dry/water tile */
00222     case 0x43: return GetClosestWaterDistance(tile, (indspec->behaviour & INDUSTRYBEH_BUILT_ONWATER) == 0);
00223 
00224     /* Layout number */
00225     case 0x44: return industry->selected_layout;
00226 
00227     /* Company info */
00228     case 0x45: {
00229       byte colours = 0;
00230       bool is_ai = false;
00231 
00232       const Company *c = Company::GetIfValid(industry->founder);
00233       if (c != NULL) {
00234         const Livery *l = &c->livery[LS_DEFAULT];
00235 
00236         is_ai = c->is_ai;
00237         colours = l->colour1 + l->colour2 * 16;
00238       }
00239 
00240       return industry->founder | (is_ai ? 0x10000 : 0) | (colours << 24);
00241     }
00242 
00243     case 0x46: return industry->construction_date; // Date when built - long format - (in days)
00244 
00245     /* Get industry ID at offset param */
00246     case 0x60: return GetIndustryIDAtOffset(GetNearbyTile(parameter, industry->location.tile, false), industry, object->grffile->grfid);
00247 
00248     /* Get random tile bits at offset param */
00249     case 0x61:
00250       tile = GetNearbyTile(parameter, tile, false);
00251       return industry->TileBelongsToIndustry(tile) ? GetIndustryRandomBits(tile) : 0;
00252 
00253     /* Land info of nearby tiles */
00254     case 0x62: return GetNearbyIndustryTileInformation(parameter, tile, INVALID_INDUSTRY, false, object->grffile->grf_version >= 8);
00255 
00256     /* Animation stage of nearby tiles */
00257     case 0x63:
00258       tile = GetNearbyTile(parameter, tile, false);
00259       if (industry->TileBelongsToIndustry(tile)) {
00260         return GetAnimationFrame(tile);
00261       }
00262       return 0xFFFFFFFF;
00263 
00264     /* Distance of nearest industry of given type */
00265     case 0x64: return GetClosestIndustry(tile, MapNewGRFIndustryType(parameter, indspec->grf_prop.grffile->grfid), industry);
00266     /* Get town zone and Manhattan distance of closest town */
00267     case 0x65: return GetTownRadiusGroup(industry->town, tile) << 16 | min(DistanceManhattan(tile, industry->town->xy), 0xFFFF);
00268     /* Get square of Euclidian distance of closes town */
00269     case 0x66: return GetTownRadiusGroup(industry->town, tile) << 16 | min(DistanceSquare(tile, industry->town->xy), 0xFFFF);
00270 
00271     /* Count of industry, distance of closest instance
00272      * 68 is the same as 67, but with a filtering on selected layout */
00273     case 0x67:
00274     case 0x68: {
00275       byte layout_filter = 0;
00276       bool town_filter = false;
00277       if (variable == 0x68) {
00278         uint32 reg = GetRegister(0x101);
00279         layout_filter = GB(reg, 0, 8);
00280         town_filter = HasBit(reg, 8);
00281       }
00282       return GetCountAndDistanceOfClosestInstance(parameter, layout_filter, town_filter, industry);
00283     }
00284 
00285     /* Get a variable from the persistent storage */
00286     case 0x7C: return (industry->psa != NULL) ? industry->psa->GetValue(parameter) : 0;
00287 
00288     /* Industry structure access*/
00289     case 0x80: return industry->location.tile;
00290     case 0x81: return GB(industry->location.tile, 8, 8);
00291     /* Pointer to the town the industry is associated with */
00292     case 0x82: return industry->town->index;
00293     case 0x83:
00294     case 0x84:
00295     case 0x85: DEBUG(grf, 0, "NewGRFs shouldn't be doing pointer magic"); break; // not supported
00296     case 0x86: return industry->location.w;
00297     case 0x87: return industry->location.h;// xy dimensions
00298 
00299     case 0x88:
00300     case 0x89: return industry->produced_cargo[variable - 0x88];
00301     case 0x8A: return industry->produced_cargo_waiting[0];
00302     case 0x8B: return GB(industry->produced_cargo_waiting[0], 8, 8);
00303     case 0x8C: return industry->produced_cargo_waiting[1];
00304     case 0x8D: return GB(industry->produced_cargo_waiting[1], 8, 8);
00305     case 0x8E:
00306     case 0x8F: return industry->production_rate[variable - 0x8E];
00307     case 0x90:
00308     case 0x91:
00309     case 0x92: return industry->accepts_cargo[variable - 0x90];
00310     case 0x93: return industry->prod_level;
00311     /* amount of cargo produced so far THIS month. */
00312     case 0x94: return industry->this_month_production[0];
00313     case 0x95: return GB(industry->this_month_production[0], 8, 8);
00314     case 0x96: return industry->this_month_production[1];
00315     case 0x97: return GB(industry->this_month_production[1], 8, 8);
00316     /* amount of cargo transported so far THIS month. */
00317     case 0x98: return industry->this_month_transported[0];
00318     case 0x99: return GB(industry->this_month_transported[0], 8, 8);
00319     case 0x9A: return industry->this_month_transported[1];
00320     case 0x9B: return GB(industry->this_month_transported[1], 8, 8);
00321     /* fraction of cargo transported LAST month. */
00322     case 0x9C:
00323     case 0x9D: return industry->last_month_pct_transported[variable - 0x9C];
00324     /* amount of cargo produced LAST month. */
00325     case 0x9E: return industry->last_month_production[0];
00326     case 0x9F: return GB(industry->last_month_production[0], 8, 8);
00327     case 0xA0: return industry->last_month_production[1];
00328     case 0xA1: return GB(industry->last_month_production[1], 8, 8);
00329     /* amount of cargo transported last month. */
00330     case 0xA2: return industry->last_month_transported[0];
00331     case 0xA3: return GB(industry->last_month_transported[0], 8, 8);
00332     case 0xA4: return industry->last_month_transported[1];
00333     case 0xA5: return GB(industry->last_month_transported[1], 8, 8);
00334 
00335     case 0xA6: return industry->type;
00336     case 0xA7: return industry->founder;
00337     case 0xA8: return industry->random_colour;
00338     case 0xA9: return Clamp(industry->last_prod_year - ORIGINAL_BASE_YEAR, 0, 255);
00339     case 0xAA: return industry->counter;
00340     case 0xAB: return GB(industry->counter, 8, 8);
00341     case 0xAC: return industry->was_cargo_delivered;
00342 
00343     case 0xB0: return Clamp(industry->construction_date - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 65535); // Date when built since 1920 (in days)
00344     case 0xB3: return industry->construction_type; // Construction type
00345     case 0xB4: return Clamp(industry->last_cargo_accepted_at - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 65535); // Date last cargo accepted since 1920 (in days)
00346   }
00347 
00348   DEBUG(grf, 1, "Unhandled industry variable 0x%X", variable);
00349 
00350   *available = false;
00351   return UINT_MAX;
00352 }
00353 
00354 static const SpriteGroup *IndustryResolveReal(const ResolverObject *object, const RealSpriteGroup *group)
00355 {
00356   /* IndustryTile do not have 'real' groups */
00357   return NULL;
00358 }
00359 
00360 static uint32 IndustryGetRandomBits(const ResolverObject *object)
00361 {
00362   const Industry *ind = object->u.industry.ind;
00363   return ind != NULL ? ind->random: 0;
00364 }
00365 
00366 static uint32 IndustryGetTriggers(const ResolverObject *object)
00367 {
00368   const Industry *ind = object->u.industry.ind;
00369   return ind != NULL ? ind->random_triggers : 0;
00370 }
00371 
00372 static void IndustrySetTriggers(const ResolverObject *object, int triggers)
00373 {
00374   Industry *ind = object->u.industry.ind;
00375   assert(ind != NULL && ind->index != INVALID_INDUSTRY);
00376   ind->random_triggers = triggers;
00377 }
00378 
00385 void IndustryStorePSA(ResolverObject *object, uint pos, int32 value)
00386 {
00387   Industry *ind = object->u.industry.ind;
00388   if (ind->index == INVALID_INDUSTRY) return;
00389 
00390   if (object->scope != VSG_SCOPE_SELF) {
00391     /* Pass the request on to the town of the industry. */
00392     TownStorePSA(ind->town, object->grffile, pos, value);
00393     return;
00394   }
00395 
00396   if (ind->psa == NULL) {
00397     /* There is no need to create a storage if the value is zero. */
00398     if (value == 0) return;
00399 
00400     /* Create storage on first modification. */
00401     const IndustrySpec *indsp = GetIndustrySpec(ind->type);
00402     uint32 grfid = (indsp->grf_prop.grffile != NULL) ? indsp->grf_prop.grffile->grfid : 0;
00403     assert(PersistentStorage::CanAllocateItem());
00404     ind->psa = new PersistentStorage(grfid);
00405   }
00406 
00407   ind->psa->StoreValue(pos, value);
00408 }
00409 
00410 static void NewIndustryResolver(ResolverObject *res, TileIndex tile, Industry *indus, IndustryType type)
00411 {
00412   res->GetRandomBits = IndustryGetRandomBits;
00413   res->GetTriggers   = IndustryGetTriggers;
00414   res->SetTriggers   = IndustrySetTriggers;
00415   res->GetVariable   = IndustryGetVariable;
00416   res->ResolveReal   = IndustryResolveReal;
00417   res->StorePSA      = IndustryStorePSA;
00418 
00419   res->u.industry.tile = tile;
00420   res->u.industry.ind  = indus;
00421   res->u.industry.gfx  = INVALID_INDUSTRYTILE;
00422   res->u.industry.type = type;
00423 
00424   res->callback        = CBID_NO_CALLBACK;
00425   res->callback_param1 = 0;
00426   res->callback_param2 = 0;
00427   res->ResetState();
00428 
00429   const IndustrySpec *indspec = GetIndustrySpec(type);
00430   res->grffile         = (indspec != NULL ? indspec->grf_prop.grffile : NULL);
00431 }
00432 
00443 uint16 GetIndustryCallback(CallbackID callback, uint32 param1, uint32 param2, Industry *industry, IndustryType type, TileIndex tile)
00444 {
00445   ResolverObject object;
00446   const SpriteGroup *group;
00447 
00448   NewIndustryResolver(&object, tile, industry, type);
00449   object.callback = callback;
00450   object.callback_param1 = param1;
00451   object.callback_param2 = param2;
00452 
00453   group = SpriteGroup::Resolve(GetIndustrySpec(type)->grf_prop.spritegroup[0], &object);
00454   if (group == NULL) return CALLBACK_FAILED;
00455 
00456   return group->GetCallbackResult();
00457 }
00458 
00459 uint32 IndustryLocationGetVariable(const ResolverObject *object, byte variable, uint32 parameter, bool *available)
00460 {
00461   const Industry *industry = object->u.industry.ind;
00462   TileIndex tile = object->u.industry.tile;
00463 
00464   if (object->scope == VSG_SCOPE_PARENT) {
00465     return TownGetVariable(variable, parameter, available, industry->town, object->grffile);
00466   }
00467 
00468   switch (variable) {
00469     case 0x80: return tile;
00470     case 0x81: return GB(tile, 8, 8);
00471 
00472     /* Pointer to the town the industry is associated with */
00473     case 0x82: return industry->town->index;
00474     case 0x83:
00475     case 0x84:
00476     case 0x85: DEBUG(grf, 0, "NewGRFs shouldn't be doing pointer magic"); break; // not supported
00477 
00478     /* Number of the layout */
00479     case 0x86: return industry->selected_layout;
00480 
00481     /* Ground type */
00482     case 0x87: return GetTerrainType(tile);
00483 
00484     /* Town zone */
00485     case 0x88: return GetTownRadiusGroup(industry->town, tile);
00486 
00487     /* Manhattan distance of the closest town */
00488     case 0x89: return min(DistanceManhattan(industry->town->xy, tile), 255);
00489 
00490     /* Lowest height of the tile */
00491     case 0x8A: return Clamp(GetTileZ(tile) * (object->grffile->grf_version >= 8 ? 1 : TILE_HEIGHT), 0, 0xFF);
00492 
00493     /* Distance to the nearest water/land tile */
00494     case 0x8B: return GetClosestWaterDistance(tile, (GetIndustrySpec(industry->type)->behaviour & INDUSTRYBEH_BUILT_ONWATER) == 0);
00495 
00496     /* Square of Euclidian distance from town */
00497     case 0x8D: return min(DistanceSquare(industry->town->xy, tile), 65535);
00498 
00499     /* 32 random bits */
00500     case 0x8F: return _industry_creation_random_bits;
00501   }
00502 
00503   /* None of the special ones, so try the general ones */
00504   return IndustryGetVariable(object, variable, parameter, available);
00505 }
00506 
00518 CommandCost CheckIfCallBackAllowsCreation(TileIndex tile, IndustryType type, uint layout, uint32 seed, uint16 initial_random_bits, Owner founder, IndustryAvailabilityCallType creation_type)
00519 {
00520   const IndustrySpec *indspec = GetIndustrySpec(type);
00521 
00522   ResolverObject object;
00523   const SpriteGroup *group;
00524 
00525   Industry ind;
00526   ind.index = INVALID_INDUSTRY;
00527   ind.location.tile = tile;
00528   ind.location.w = 0; // important to mark the industry invalid
00529   ind.type = type;
00530   ind.selected_layout = layout;
00531   ind.town = ClosestTownFromTile(tile, UINT_MAX);
00532   ind.random = initial_random_bits;
00533   ind.founder = founder;
00534 
00535   NewIndustryResolver(&object, tile, &ind, type);
00536   object.GetVariable = IndustryLocationGetVariable;
00537   object.callback = CBID_INDUSTRY_LOCATION;
00538   object.callback_param2 = creation_type;
00539   _industry_creation_random_bits = seed;
00540 
00541   group = SpriteGroup::Resolve(GetIndustrySpec(type)->grf_prop.spritegroup[0], &object);
00542 
00543   /* Unlike the "normal" cases, not having a valid result means we allow
00544    * the building of the industry, as that's how it's done in TTDP. */
00545   if (group == NULL) return CommandCost();
00546   uint16 result = group->GetCallbackResult();
00547   if (result == CALLBACK_FAILED) return CommandCost();
00548 
00549   return GetErrorMessageFromLocationCallbackResult(result, indspec->grf_prop.grffile->grfid, STR_ERROR_SITE_UNSUITABLE);
00550 }
00551 
00558 uint32 GetIndustryProbabilityCallback(IndustryType type, IndustryAvailabilityCallType creation_type, uint32 default_prob)
00559 {
00560   const IndustrySpec *indspec = GetIndustrySpec(type);
00561 
00562   if (HasBit(indspec->callback_mask, CBM_IND_PROBABILITY)) {
00563     uint16 res = GetIndustryCallback(CBID_INDUSTRY_PROBABILITY, 0, creation_type, NULL, type, INVALID_TILE);
00564     if (res != CALLBACK_FAILED) {
00565       if (indspec->grf_prop.grffile->grf_version < 8) {
00566         /* Disallow if result != 0 */
00567         if (res != 0) default_prob = 0;
00568       } else {
00569         /* Use returned probability. 0x100 to use default */
00570         if (res < 0x100) {
00571           default_prob = res;
00572         } else if (res > 0x100) {
00573           ErrorUnknownCallbackResult(indspec->grf_prop.grffile->grfid, CBID_INDUSTRY_PROBABILITY, res);
00574         }
00575       }
00576     }
00577   }
00578   return default_prob;
00579 }
00580 
00581 static int32 DerefIndProd(int field, bool use_register)
00582 {
00583   return use_register ? (int32)GetRegister(field) : field;
00584 }
00585 
00591 void IndustryProductionCallback(Industry *ind, int reason)
00592 {
00593   const IndustrySpec *spec = GetIndustrySpec(ind->type);
00594   ResolverObject object;
00595   NewIndustryResolver(&object, ind->location.tile, ind, ind->type);
00596   if ((spec->behaviour & INDUSTRYBEH_PRODCALLBACK_RANDOM) != 0) object.callback_param1 = Random();
00597   int multiplier = 1;
00598   if ((spec->behaviour & INDUSTRYBEH_PROD_MULTI_HNDLING) != 0) multiplier = ind->prod_level;
00599   object.callback_param2 = reason;
00600 
00601   for (uint loop = 0;; loop++) {
00602     /* limit the number of calls to break infinite loops.
00603      * 'loop' is provided as 16 bits to the newgrf, so abort when those are exceeded. */
00604     if (loop >= 0x10000) {
00605       /* display error message */
00606       SetDParamStr(0, spec->grf_prop.grffile->filename);
00607       SetDParam(1, spec->name);
00608       ShowErrorMessage(STR_NEWGRF_BUGGY, STR_NEWGRF_BUGGY_ENDLESS_PRODUCTION_CALLBACK, WL_WARNING);
00609 
00610       /* abort the function early, this error isn't critical and will allow the game to continue to run */
00611       break;
00612     }
00613 
00614     SB(object.callback_param2, 8, 16, loop);
00615     const SpriteGroup *tgroup = SpriteGroup::Resolve(spec->grf_prop.spritegroup[0], &object);
00616     if (tgroup == NULL || tgroup->type != SGT_INDUSTRY_PRODUCTION) break;
00617     const IndustryProductionSpriteGroup *group = (const IndustryProductionSpriteGroup *)tgroup;
00618 
00619     bool deref = (group->version == 1);
00620 
00621     for (uint i = 0; i < 3; i++) {
00622       ind->incoming_cargo_waiting[i] = Clamp(ind->incoming_cargo_waiting[i] - DerefIndProd(group->subtract_input[i], deref) * multiplier, 0, 0xFFFF);
00623     }
00624     for (uint i = 0; i < 2; i++) {
00625       ind->produced_cargo_waiting[i] = Clamp(ind->produced_cargo_waiting[i] + max(DerefIndProd(group->add_output[i], deref), 0) * multiplier, 0, 0xFFFF);
00626     }
00627 
00628     int32 again = DerefIndProd(group->again, deref);
00629     if (again == 0) break;
00630 
00631     SB(object.callback_param2, 24, 8, again);
00632   }
00633 
00634   SetWindowDirty(WC_INDUSTRY_VIEW, ind->index);
00635 }
00636 
00642 void GetIndustryResolver(ResolverObject *ro, uint index)
00643 {
00644   Industry *i = Industry::Get(index);
00645   NewIndustryResolver(ro, i->location.tile, i, i->type);
00646 }
00647 
00655 bool IndustryTemporarilyRefusesCargo(Industry *ind, CargoID cargo_type)
00656 {
00657   assert(cargo_type == ind->accepts_cargo[0] || cargo_type == ind->accepts_cargo[1] || cargo_type == ind->accepts_cargo[2]);
00658 
00659   const IndustrySpec *indspec = GetIndustrySpec(ind->type);
00660   if (HasBit(indspec->callback_mask, CBM_IND_REFUSE_CARGO)) {
00661     uint16 res = GetIndustryCallback(CBID_INDUSTRY_REFUSE_CARGO,
00662         0, GetReverseCargoTranslation(cargo_type, indspec->grf_prop.grffile),
00663         ind, ind->type, ind->location.tile);
00664     if (res != CALLBACK_FAILED) return !ConvertBooleanCallback(indspec->grf_prop.grffile, CBID_INDUSTRY_REFUSE_CARGO, res);
00665   }
00666   return false;
00667 }