newgrf_industries.cpp

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00001 /* $Id: newgrf_industries.cpp 16059 2009-04-14 21:07:33Z rubidium $ */
00002 
00005 #include "stdafx.h"
00006 #include "debug.h"
00007 #include "tile_type.h"
00008 #include "strings_type.h"
00009 #include "company_type.h"
00010 #include "industry_map.h"
00011 #include "newgrf.h"
00012 #include "newgrf_industries.h"
00013 #include "newgrf_commons.h"
00014 #include "newgrf_text.h"
00015 #include "newgrf_town.h"
00016 #include "window_func.h"
00017 #include "town.h"
00018 #include "company_base.h"
00019 #include "command_func.h"
00020 #include "gui.h"
00021 #include "strings_func.h"
00022 
00023 #include "table/strings.h"
00024 
00025 static uint32 _industry_creation_random_bits;
00026 
00027 /* Since the industry IDs defined by the GRF file don't necessarily correlate
00028  * to those used by the game, the IDs used for overriding old industries must be
00029  * translated when the idustry spec is set. */
00030 IndustryOverrideManager _industry_mngr(NEW_INDUSTRYOFFSET, NUM_INDUSTRYTYPES, INVALID_INDUSTRYTYPE);
00031 IndustryTileOverrideManager _industile_mngr(NEW_INDUSTRYTILEOFFSET, NUM_INDUSTRYTILES, INVALID_INDUSTRYTILE);
00032 
00033 IndustryType MapNewGRFIndustryType(IndustryType grf_type, uint32 grf_id)
00034 {
00035   if (grf_type == IT_INVALID) return IT_INVALID;
00036   if (!HasBit(grf_type, 7)) return GB(grf_type, 0, 6);
00037 
00038   return _industry_mngr.GetID(GB(grf_type, 0, 6), grf_id);
00039 }
00040 
00048 static uint GetClosestWaterDistance(TileIndex tile, bool water)
00049 {
00050   if (IsTileType(tile, MP_WATER) == water) return 0;
00051 
00052   uint max_dist = water ? 0x7F : 0x200;
00053 
00054   int x = TileX(tile);
00055   int y = TileY(tile);
00056 
00057   uint max_x = MapMaxX();
00058   uint max_y = MapMaxY();
00059   uint min_xy = _settings_game.construction.freeform_edges ? 1 : 0;
00060 
00061   /* go in a 'spiral' with increasing manhattan distance in each iteration */
00062   for (uint dist = 1; dist < max_dist; dist++) {
00063     /* next 'diameter' */
00064     y--;
00065 
00066     /* going counter-clockwise around this square */
00067     for (DiagDirection dir = DIAGDIR_BEGIN; dir < DIAGDIR_END; dir++) {
00068       static const int8 ddx[DIAGDIR_END] = { -1,  1,  1, -1};
00069       static const int8 ddy[DIAGDIR_END] = {  1,  1, -1, -1};
00070 
00071       int dx = ddx[dir];
00072       int dy = ddy[dir];
00073 
00074       /* each side of this square has length 'dist' */
00075       for (uint a = 0; a < dist; a++) {
00076         /* MP_VOID tiles are not checked (interval is [min; max) for IsInsideMM())*/
00077         if (IsInsideMM(x, min_xy, max_x) && IsInsideMM(y, min_xy, max_y)) {
00078           TileIndex t = TileXY(x, y);
00079           if (IsTileType(t, MP_WATER) == water) return dist;
00080         }
00081         x += dx;
00082         y += dy;
00083       }
00084     }
00085   }
00086 
00087   if (!water) {
00088     /* no land found - is this a water-only map? */
00089     for (TileIndex t = 0; t < MapSize(); t++) {
00090       if (!IsTileType(t, MP_VOID) && !IsTileType(t, MP_WATER)) return 0x1FF;
00091     }
00092   }
00093 
00094   return max_dist;
00095 }
00096 
00102 uint32 GetIndustryIDAtOffset(TileIndex tile, const Industry *i)
00103 {
00104   if (!IsTileType(tile, MP_INDUSTRY) || GetIndustryIndex(tile) != i->index) {
00105     /* No industry and/or the tile does not have the same industry as the one we match it with */
00106     return 0xFFFF;
00107   }
00108 
00109   IndustryGfx gfx = GetCleanIndustryGfx(tile);
00110   const IndustryTileSpec *indtsp = GetIndustryTileSpec(gfx);
00111   const IndustrySpec *indold = GetIndustrySpec(i->type);
00112 
00113   if (gfx < NEW_INDUSTRYOFFSET) { // Does it belongs to an old type?
00114     /* It is an old tile.  We have to see if it's been overriden */
00115     if (indtsp->grf_prop.override == INVALID_INDUSTRYTILE) { // has it been overridden?
00116       return 0xFF << 8 | gfx; // no. Tag FF + the gfx id of that tile
00117     }
00118     /* Not overriden */
00119     const IndustryTileSpec *tile_ovr = GetIndustryTileSpec(indtsp->grf_prop.override);
00120 
00121     if (tile_ovr->grf_prop.grffile->grfid == indold->grf_prop.grffile->grfid) {
00122       return tile_ovr->grf_prop.local_id; // same grf file
00123     } else {
00124       return 0xFFFE; // not the same grf file
00125     }
00126   }
00127   /* Not an 'old type' tile */
00128   if (indtsp->grf_prop.spritegroup != NULL) { // tile has a spritegroup ?
00129     if (indtsp->grf_prop.grffile->grfid == indold->grf_prop.grffile->grfid) { // same industry, same grf ?
00130       return indtsp->grf_prop.local_id;
00131     } else {
00132       return 0xFFFE; // Defined in another grf file
00133     }
00134   }
00135   /* The tile has no spritegroup */
00136   return 0xFF << 8 | indtsp->grf_prop.subst_id; // so just give him the substitute
00137 }
00138 
00139 static uint32 GetClosestIndustry(TileIndex tile, IndustryType type, const Industry *current)
00140 {
00141   uint32 best_dist = UINT32_MAX;
00142   const Industry *i;
00143   FOR_ALL_INDUSTRIES(i) {
00144     if (i->type != type || i == current) continue;
00145 
00146     best_dist = min(best_dist, DistanceManhattan(tile, i->xy));
00147   }
00148 
00149   return best_dist;
00150 }
00151 
00160 static uint32 GetCountAndDistanceOfClosestInstance(byte param_setID, byte layout_filter, const Industry *current)
00161 {
00162   uint32 GrfID = GetRegister(0x100);  
00163   IndustryType ind_index;
00164   uint32 closest_dist = UINT32_MAX;
00165   byte count = 0;
00166 
00167   /* Determine what will be the industry type to look for */
00168   switch (GrfID) {
00169     case 0:  // this is a default industry type
00170       ind_index = param_setID;
00171       break;
00172 
00173     case 0xFFFFFFFF: // current grf
00174       GrfID = GetIndustrySpec(current->type)->grf_prop.grffile->grfid;
00175       /* Fall through */
00176 
00177     default: // use the grfid specified in register 100h
00178       SetBit(param_setID, 7); // bit 7 means it is not an old type
00179       ind_index = MapNewGRFIndustryType(param_setID, GrfID);
00180       break;
00181   }
00182 
00183   if (layout_filter == 0) {
00184     /* If the filter is 0, it could be because none was specified as well as being really a 0.
00185      * In either case, just do the regular var67 */
00186     closest_dist = GetClosestIndustry(current->xy, ind_index, current);
00187     count = GetIndustryTypeCount(ind_index);
00188   } else {
00189     /* Count only those who match the same industry type and layout filter
00190      * Unfortunately, we have to do it manually */
00191     const Industry *i;
00192     FOR_ALL_INDUSTRIES(i) {
00193       if (i->type == ind_index && i != current && i->selected_layout == layout_filter) {
00194         closest_dist = min(closest_dist, DistanceManhattan(current->xy, i->xy));
00195         count++;
00196       }
00197     }
00198   }
00199 
00200   return count << 16 | GB(closest_dist, 0, 16);
00201 }
00202 
00209 uint32 IndustryGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
00210 {
00211   const Industry *industry = object->u.industry.ind;
00212   TileIndex tile = object->u.industry.tile;
00213   IndustryType type = object->u.industry.type;
00214   const IndustrySpec *indspec = GetIndustrySpec(type);
00215 
00216   /* Shall the variable get resolved in parent scope and are we not yet in parent scope? */
00217   if (object->u.industry.gfx == INVALID_INDUSTRYTILE && object->scope == VSG_SCOPE_PARENT) {
00218     /* Pass the request on to the town of the industry */
00219     const Town *t;
00220 
00221     if (industry != NULL) {
00222       t = industry->town;
00223     } else if (tile != INVALID_TILE) {
00224       t = ClosestTownFromTile(tile, UINT_MAX);
00225     } else {
00226       *available = false;
00227       return UINT_MAX;
00228     }
00229 
00230     return TownGetVariable(variable, parameter, available, t);
00231   }
00232 
00233   if (industry == NULL) {
00234     /* industry does not exist, only use those variables that are "safe" */
00235     switch (variable) {
00236       /* Manhattan distance of closes dry/water tile */
00237       case 0x43: return GetClosestWaterDistance(tile, (indspec->behaviour & INDUSTRYBEH_BUILT_ONWATER) == 0);
00238     }
00239 
00240     DEBUG(grf, 1, "Unhandled property 0x%X (no available industry) in callback 0x%x", variable, object->callback);
00241 
00242     *available = false;
00243     return UINT_MAX;
00244   }
00245 
00246   switch (variable) {
00247     case 0x40:
00248     case 0x41:
00249     case 0x42: { // waiting cargo, but only if those two callback flags are set
00250       uint16 callback = indspec->callback_flags;
00251       if (HasBit(callback, CBM_IND_PRODUCTION_CARGO_ARRIVAL) || HasBit(callback, CBM_IND_PRODUCTION_256_TICKS)) {
00252         if ((indspec->behaviour & INDUSTRYBEH_PROD_MULTI_HNDLING) != 0) {
00253           return min(industry->incoming_cargo_waiting[variable - 0x40] / industry->prod_level, (uint16)0xFFFF);
00254         } else {
00255           return min(industry->incoming_cargo_waiting[variable - 0x40], (uint16)0xFFFF);
00256         }
00257       } else {
00258         return 0;
00259       }
00260     }
00261 
00262     /* Manhattan distance of closes dry/water tile */
00263     case 0x43: return GetClosestWaterDistance(tile, (indspec->behaviour & INDUSTRYBEH_BUILT_ONWATER) == 0);
00264 
00265     /* Layout number */
00266     case 0x44: return industry->selected_layout;
00267 
00268     /* Company info */
00269     case 0x45: {
00270       byte colours;
00271       bool is_ai = false;
00272 
00273       if (IsValidCompanyID(industry->founder)) {
00274         const Company *c = GetCompany(industry->founder);
00275         const Livery *l = &c->livery[LS_DEFAULT];
00276 
00277         is_ai = c->is_ai;
00278         colours = l->colour1 + l->colour2 * 16;
00279       } else {
00280         colours = GB(Random(), 0, 8);
00281       }
00282 
00283       return industry->founder | (is_ai ? 0x10000 : 0) | (colours << 24);
00284     }
00285 
00286     case 0x46: return industry->construction_date; // Date when built - long format - (in days)
00287 
00288     /* Get industry ID at offset param */
00289     case 0x60: return GetIndustryIDAtOffset(GetNearbyTile(parameter, industry->xy), industry);
00290 
00291     /* Get random tile bits at offset param */
00292     case 0x61:
00293       tile = GetNearbyTile(parameter, tile);
00294       return (IsTileType(tile, MP_INDUSTRY) && GetIndustryByTile(tile) == industry) ? GetIndustryRandomBits(tile) : 0;
00295 
00296     /* Land info of nearby tiles */
00297     case 0x62: return GetNearbyIndustryTileInformation(parameter, tile, INVALID_INDUSTRY);
00298 
00299     /* Animation stage of nearby tiles */
00300     case 0x63:
00301       tile = GetNearbyTile(parameter, tile);
00302       if (IsTileType(tile, MP_INDUSTRY) && GetIndustryByTile(tile) == industry) {
00303         return GetIndustryAnimationState(tile);
00304       }
00305       return 0xFFFFFFFF;
00306 
00307     /* Distance of nearest industry of given type */
00308     case 0x64: return GetClosestIndustry(tile, MapNewGRFIndustryType(parameter, indspec->grf_prop.grffile->grfid), industry);
00309     /* Get town zone and Manhattan distance of closest town */
00310     case 0x65: return GetTownRadiusGroup(industry->town, tile) << 16 | min(DistanceManhattan(tile, industry->town->xy), 0xFFFF);
00311     /* Get square of Euclidian distance of closes town */
00312     case 0x66: return GetTownRadiusGroup(industry->town, tile) << 16 | min(DistanceSquare(tile, industry->town->xy), 0xFFFF);
00313 
00314     /* Count of industry, distance of closest instance
00315      * 68 is the same as 67, but with a filtering on selected layout */
00316     case 0x67:
00317     case 0x68: return GetCountAndDistanceOfClosestInstance(parameter, variable == 0x68 ? GB(GetRegister(0x101), 0, 8) : 0, industry);
00318 
00319     /* Get a variable from the persistent storage */
00320     case 0x7C: return industry->psa.Get(parameter);
00321 
00322     /* Industry structure access*/
00323     case 0x80: return industry->xy;
00324     case 0x81: return GB(industry->xy, 8, 8);
00325     /* Pointer to the town the industry is associated with */
00326     case 0x82: return industry->town->index;
00327     case 0x83:
00328     case 0x84:
00329     case 0x85: DEBUG(grf, 0, "NewGRFs shouldn't be doing pointer magic"); break; // not supported
00330     case 0x86: return industry->width;
00331     case 0x87: return industry->height;// xy dimensions
00332 
00333     case 0x88:
00334     case 0x89: return industry->produced_cargo[variable - 0x88];
00335     case 0x8A: return industry->produced_cargo_waiting[0];
00336     case 0x8B: return GB(industry->produced_cargo_waiting[0], 8, 8);
00337     case 0x8C: return industry->produced_cargo_waiting[1];
00338     case 0x8D: return GB(industry->produced_cargo_waiting[1], 8, 8);
00339     case 0x8E:
00340     case 0x8F: return industry->production_rate[variable - 0x8E];
00341     case 0x90:
00342     case 0x91:
00343     case 0x92: return industry->accepts_cargo[variable - 0x90];
00344     case 0x93: return industry->prod_level;
00345     /* amount of cargo produced so far THIS month. */
00346     case 0x94: return industry->this_month_production[0];
00347     case 0x95: return GB(industry->this_month_production[0], 8, 8);
00348     case 0x96: return industry->this_month_production[1];
00349     case 0x97: return GB(industry->this_month_production[1], 8, 8);
00350     /* amount of cargo transported so far THIS month. */
00351     case 0x98: return industry->this_month_transported[0];
00352     case 0x99: return GB(industry->this_month_transported[0], 8, 8);
00353     case 0x9A: return industry->this_month_transported[1];
00354     case 0x9B: return GB(industry->this_month_transported[0], 8, 8);
00355     /* fraction of cargo transported LAST month. */
00356     case 0x9C:
00357     case 0x9D: return industry->last_month_pct_transported[variable - 0x9C];
00358     /* amount of cargo produced LAST month. */
00359     case 0x9E: return industry->last_month_production[0];
00360     case 0x9F: return GB(industry->last_month_production[0], 8, 8);
00361     case 0xA0: return industry->last_month_production[1];
00362     case 0xA1: return GB(industry->last_month_production[1], 8, 8);
00363     /* amount of cargo transported last month. */
00364     case 0xA2: return industry->last_month_transported[0];
00365     case 0xA3: return GB(industry->last_month_transported[0], 8, 8);
00366     case 0xA4: return industry->last_month_transported[1];
00367     case 0xA5: return GB(industry->last_month_transported[0], 8, 8);
00368 
00369     case 0xA6: return industry->type;
00370     case 0xA7: return industry->founder;
00371     case 0xA8: return industry->random_colour;
00372     case 0xA9: return Clamp(industry->last_prod_year - ORIGINAL_BASE_YEAR, 0, 255);
00373     case 0xAA: return industry->counter;
00374     case 0xAB: return GB(industry->counter, 8, 8);
00375     case 0xAC: return industry->was_cargo_delivered;
00376 
00377     case 0xB0: return Clamp(industry->construction_date - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 65535); // Date when built since 1920 (in days)
00378     case 0xB3: return industry->construction_type; // Construction type
00379     case 0xB4: return Clamp(industry->last_cargo_accepted_at - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 65535); // Date last cargo accepted since 1920 (in days)
00380   }
00381 
00382   DEBUG(grf, 1, "Unhandled industry property 0x%X", variable);
00383 
00384   *available = false;
00385   return UINT_MAX;
00386 }
00387 
00388 static const SpriteGroup *IndustryResolveReal(const ResolverObject *object, const SpriteGroup *group)
00389 {
00390   /* IndustryTile do not have 'real' groups */
00391   return NULL;
00392 }
00393 
00394 static uint32 IndustryGetRandomBits(const ResolverObject *object)
00395 {
00396   return object->u.industry.ind == NULL ? 0 : object->u.industry.ind->random;
00397 }
00398 
00399 static uint32 IndustryGetTriggers(const ResolverObject *object)
00400 {
00401   return object->u.industry.ind == NULL ? 0 : object->u.industry.ind->random_triggers;
00402 }
00403 
00404 static void IndustrySetTriggers(const ResolverObject *object, int triggers)
00405 {
00406   if (object->u.industry.ind == NULL) return;
00407   object->u.industry.ind->random_triggers = triggers;
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 
00418   res->psa             = &indus->psa;
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->last_value      = 0;
00428   res->trigger         = 0;
00429   res->reseed          = 0;
00430   res->count           = 0;
00431 
00432   const IndustrySpec *indspec = GetIndustrySpec(type);
00433   res->grffile         = (indspec != NULL ? indspec->grf_prop.grffile : NULL);
00434 }
00435 
00436 uint16 GetIndustryCallback(CallbackID callback, uint32 param1, uint32 param2, Industry *industry, IndustryType type, TileIndex tile)
00437 {
00438   ResolverObject object;
00439   const SpriteGroup *group;
00440 
00441   NewIndustryResolver(&object, tile, industry, type);
00442   object.callback = callback;
00443   object.callback_param1 = param1;
00444   object.callback_param2 = param2;
00445 
00446   group = Resolve(GetIndustrySpec(type)->grf_prop.spritegroup, &object);
00447   if (group == NULL || group->type != SGT_CALLBACK) return CALLBACK_FAILED;
00448 
00449   return group->g.callback.result;
00450 }
00451 
00452 uint32 IndustryLocationGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
00453 {
00454   const Industry *industry = object->u.industry.ind;
00455   TileIndex tile = object->u.industry.tile;
00456 
00457   if (object->scope == VSG_SCOPE_PARENT) {
00458     return TownGetVariable(variable, parameter, available, industry->town);
00459   }
00460 
00461   switch (variable) {
00462     case 0x80: return tile;
00463     case 0x81: return GB(tile, 8, 8);
00464 
00465     /* Pointer to the town the industry is associated with */
00466     case 0x82: return industry->town->index;
00467     case 0x83:
00468     case 0x84:
00469     case 0x85: DEBUG(grf, 0, "NewGRFs shouldn't be doing pointer magic"); break; // not supported
00470 
00471     /* Number of the layout */
00472     case 0x86: return industry->selected_layout;
00473 
00474     /* Ground type */
00475     case 0x87: return GetTerrainType(tile);
00476 
00477     /* Town zone */
00478     case 0x88: return GetTownRadiusGroup(industry->town, tile);
00479 
00480     /* Manhattan distance of the closest town */
00481     case 0x89: return min(DistanceManhattan(industry->town->xy, tile), 255);
00482 
00483     /* Lowest height of the tile */
00484     case 0x8A: return GetTileZ(tile);
00485 
00486     /* Distance to the nearest water/land tile */
00487     case 0x8B: return GetClosestWaterDistance(tile, (GetIndustrySpec(industry->type)->behaviour & INDUSTRYBEH_BUILT_ONWATER) == 0);
00488 
00489     /* Square of Euclidian distance from town */
00490     case 0x8D: return min(DistanceSquare(industry->town->xy, tile), 65535);
00491 
00492     /* 32 random bits */
00493     case 0x8F: return _industry_creation_random_bits;
00494   }
00495 
00496   /* None of the special ones, so try the general ones */
00497   return IndustryGetVariable(object, variable, parameter, available);
00498 }
00499 
00500 bool CheckIfCallBackAllowsCreation(TileIndex tile, IndustryType type, uint itspec_index, uint32 seed)
00501 {
00502   const IndustrySpec *indspec = GetIndustrySpec(type);
00503 
00504   ResolverObject object;
00505   const SpriteGroup *group;
00506 
00507   Industry ind;
00508   ind.index = INVALID_INDUSTRY;
00509   ind.xy = tile;
00510   ind.width = 0;
00511   ind.type = type;
00512   ind.selected_layout = itspec_index;
00513   ind.town = ClosestTownFromTile(tile, UINT_MAX);
00514 
00515   NewIndustryResolver(&object, tile, &ind, type);
00516   object.GetVariable = IndustryLocationGetVariable;
00517   object.callback = CBID_INDUSTRY_LOCATION;
00518   _industry_creation_random_bits = seed;
00519 
00520   group = Resolve(GetIndustrySpec(type)->grf_prop.spritegroup, &object);
00521 
00522   /* Unlike the "normal" cases, not having a valid result means we allow
00523    * the building of the industry, as that's how it's done in TTDP. */
00524   if (group == NULL || group->type != SGT_CALLBACK || group->g.callback.result == 0x400) return true;
00525 
00526   /* Copy some parameters from the registers to the error message text ref. stack */
00527   SwitchToErrorRefStack();
00528   PrepareTextRefStackUsage(4);
00529   SwitchToNormalRefStack();
00530 
00531   switch (group->g.callback.result) {
00532     case 0x401: _error_message = STR_0239_SITE_UNSUITABLE; break;
00533     case 0x402: _error_message = STR_0317_CAN_ONLY_BE_BUILT_IN_RAINFOREST; break;
00534     case 0x403: _error_message = STR_0318_CAN_ONLY_BE_BUILT_IN_DESERT; break;
00535     default: _error_message = GetGRFStringID(indspec->grf_prop.grffile->grfid, 0xD000 + group->g.callback.result); break;
00536   }
00537 
00538   return false;
00539 }
00540 
00541 bool CheckIfCallBackAllowsAvailability(IndustryType type, IndustryAvailabilityCallType creation_type)
00542 {
00543   const IndustrySpec *indspec = GetIndustrySpec(type);
00544 
00545   if (HasBit(indspec->callback_flags, CBM_IND_AVAILABLE)) {
00546     uint16 res = GetIndustryCallback(CBID_INDUSTRY_AVAILABLE, 0, creation_type, NULL, type, INVALID_TILE);
00547     if (res != CALLBACK_FAILED) {
00548       return (res == 0);
00549     }
00550   }
00551   return true;
00552 }
00553 
00554 static int32 DerefIndProd(uint field, bool use_register)
00555 {
00556   return use_register ? (int32)GetRegister(field) : field;
00557 }
00558 
00564 void IndustryProductionCallback(Industry *ind, int reason)
00565 {
00566   const IndustrySpec *spec = GetIndustrySpec(ind->type);
00567   ResolverObject object;
00568   NewIndustryResolver(&object, ind->xy, ind, ind->type);
00569   if ((spec->behaviour & INDUSTRYBEH_PRODCALLBACK_RANDOM) != 0) object.callback_param1 = Random();
00570   int multiplier = 1;
00571   if ((spec->behaviour & INDUSTRYBEH_PROD_MULTI_HNDLING) != 0) multiplier = ind->prod_level;
00572   object.callback_param2 = reason;
00573 
00574   for (uint loop = 0;; loop++) {
00575     /* limit the number of calls to break infinite loops.
00576      * 'loop' is provided as 16 bits to the newgrf, so abort when those are exceeded. */
00577     if (loop >= 0x10000) {
00578       /* display error message */
00579       SetDParamStr(0, spec->grf_prop.grffile->filename);
00580       SetDParam(1, spec->name);
00581       ShowErrorMessage(STR_NEWGRF_BUGGY_ENDLESS_PRODUCTION_CALLBACK, STR_NEWGRF_BUGGY, 0, 0);
00582 
00583       /* abort the function early, this error isn't critical and will allow the game to continue to run */
00584       break;
00585     }
00586 
00587     SB(object.callback_param2, 8, 16, loop);
00588     const SpriteGroup *group = Resolve(spec->grf_prop.spritegroup, &object);
00589     if (group == NULL || group->type != SGT_INDUSTRY_PRODUCTION) break;
00590 
00591     bool deref = (group->g.indprod.version == 1);
00592 
00593     for (uint i = 0; i < 3; i++) {
00594       ind->incoming_cargo_waiting[i] = Clamp(ind->incoming_cargo_waiting[i] - DerefIndProd(group->g.indprod.substract_input[i], deref) * multiplier, 0, 0xFFFF);
00595     }
00596     for (uint i = 0; i < 2; i++) {
00597       ind->produced_cargo_waiting[i] = Clamp(ind->produced_cargo_waiting[i] + max(DerefIndProd(group->g.indprod.add_output[i], deref), 0) * multiplier, 0, 0xFFFF);
00598     }
00599 
00600     int32 again = DerefIndProd(group->g.indprod.again, deref);
00601     if (again == 0) break;
00602 
00603     SB(object.callback_param2, 24, 8, again);
00604   }
00605 
00606   InvalidateWindow(WC_INDUSTRY_VIEW, ind->index);
00607 }

Generated on Wed Jun 3 19:05:12 2009 for OpenTTD by  doxygen 1.5.6