src/newgrf_town.cpp

   1 /* $Id: newgrf_town.cpp 26175 2013-12-23 18:09:29Z frosch $ */
   2
   3 /*
   4  * This file is part of OpenTTD.
   5  * 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.
   6  * 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.
   7  * 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/>.
   8  */
   9
  10 /** @file newgrf_town.cpp Implementation of the town part of NewGRF houses. */
  11
  12 #include "stdafx.h"
  13 #include "debug.h"
  14 #include "town.h"
  15 #include "newgrf_town.h"
  16
  17 #include "safeguards.h"
  18
  19 /* virtual */ uint32 TownScopeResolver::GetVariable(byte variable, uint32 parameter, bool *available) const
  20 {
  21         switch (variable) {
  22                 /* Larger towns */
  23                 case 0x40:
  24                         if (_settings_game.economy.larger_towns == 0) return 2;
  25                         if (this->t->larger_town) return 1;
  26                         return 0;
  27
  28                 /* Town index */
  29                 case 0x41: return this->t->index;
  30
  31                 /* Get a variable from the persistent storage */
  32                 case 0x7C: {
  33                         /* Check the persistent storage for the GrfID stored in register 100h. */
  34                         uint32 grfid = GetRegister(0x100);
  35                         if (grfid == 0xFFFFFFFF) {
  36                                 if (this->ro.grffile == nullptr) return 0;
  37                                 grfid = this->ro.grffile->grfid;
  38                         }
  39
  40                         std::list<PersistentStorage *>::iterator iter;
  41                         for (iter = this->t->psa_list.begin(); iter != this->t->psa_list.end(); iter++) {
  42                                 if ((*iter)->grfid == grfid) return (*iter)->GetValue(parameter);
  43                         }
  44
  45                         return 0;
  46                 }
  47
  48                 /* Town properties */
  49                 case 0x80: return this->t->xy;
  50                 case 0x81: return GB(this->t->xy, 8, 8);
  51                 case 0x82: return ClampToU16(this->t->cache.population);
  52                 case 0x83: return GB(ClampToU16(this->t->cache.population), 8, 8);
  53                 case 0x8A: return this->t->grow_counter / TOWN_GROWTH_TICKS;
  54                 case 0x92: return this->t->flags;  // In original game, 0x92 and 0x93 are really one word. Since flags is a byte, this is to adjust
  55                 case 0x93: return 0;
  56                 case 0x94: return ClampToU16(this->t->cache.squared_town_zone_radius[0]);
  57                 case 0x95: return GB(ClampToU16(this->t->cache.squared_town_zone_radius[0]), 8, 8);
  58                 case 0x96: return ClampToU16(this->t->cache.squared_town_zone_radius[1]);
  59                 case 0x97: return GB(ClampToU16(this->t->cache.squared_town_zone_radius[1]), 8, 8);
  60                 case 0x98: return ClampToU16(this->t->cache.squared_town_zone_radius[2]);
  61                 case 0x99: return GB(ClampToU16(this->t->cache.squared_town_zone_radius[2]), 8, 8);
  62                 case 0x9A: return ClampToU16(this->t->cache.squared_town_zone_radius[3]);
  63                 case 0x9B: return GB(ClampToU16(this->t->cache.squared_town_zone_radius[3]), 8, 8);
  64                 case 0x9C: return ClampToU16(this->t->cache.squared_town_zone_radius[4]);
  65                 case 0x9D: return GB(ClampToU16(this->t->cache.squared_town_zone_radius[4]), 8, 8);
  66                 case 0x9E: return this->t->ratings[0];
  67                 case 0x9F: return GB(this->t->ratings[0], 8, 8);
  68                 case 0xA0: return this->t->ratings[1];
  69                 case 0xA1: return GB(this->t->ratings[1], 8, 8);
  70                 case 0xA2: return this->t->ratings[2];
  71                 case 0xA3: return GB(this->t->ratings[2], 8, 8);
  72                 case 0xA4: return this->t->ratings[3];
  73                 case 0xA5: return GB(this->t->ratings[3], 8, 8);
  74                 case 0xA6: return this->t->ratings[4];
  75                 case 0xA7: return GB(this->t->ratings[4], 8, 8);
  76                 case 0xA8: return this->t->ratings[5];
  77                 case 0xA9: return GB(this->t->ratings[5], 8, 8);
  78                 case 0xAA: return this->t->ratings[6];
  79                 case 0xAB: return GB(this->t->ratings[6], 8, 8);
  80                 case 0xAC: return this->t->ratings[7];
  81                 case 0xAD: return GB(this->t->ratings[7], 8, 8);
  82                 case 0xAE: return this->t->have_ratings;
  83                 case 0xB2: return this->t->statues;
  84                 case 0xB6: return ClampToU16(this->t->cache.num_houses);
  85                 case 0xB9: return this->t->growth_rate / TOWN_GROWTH_TICKS;
  86                 case 0xBA: return ClampToU16(this->t->supplied[CT_PASSENGERS].new_max);
  87                 case 0xBB: return GB(ClampToU16(this->t->supplied[CT_PASSENGERS].new_max), 8, 8);
  88                 case 0xBC: return ClampToU16(this->t->supplied[CT_MAIL].new_max);
  89                 case 0xBD: return GB(ClampToU16(this->t->supplied[CT_MAIL].new_max), 8, 8);
  90                 case 0xBE: return ClampToU16(this->t->supplied[CT_PASSENGERS].new_act);
  91                 case 0xBF: return GB(ClampToU16(this->t->supplied[CT_PASSENGERS].new_act), 8, 8);
  92                 case 0xC0: return ClampToU16(this->t->supplied[CT_MAIL].new_act);
  93                 case 0xC1: return GB(ClampToU16(this->t->supplied[CT_MAIL].new_act), 8, 8);
  94                 case 0xC2: return ClampToU16(this->t->supplied[CT_PASSENGERS].old_max);
  95                 case 0xC3: return GB(ClampToU16(this->t->supplied[CT_PASSENGERS].old_max), 8, 8);
  96                 case 0xC4: return ClampToU16(this->t->supplied[CT_MAIL].old_max);
  97                 case 0xC5: return GB(ClampToU16(this->t->supplied[CT_MAIL].old_max), 8, 8);
  98                 case 0xC6: return ClampToU16(this->t->supplied[CT_PASSENGERS].old_act);
  99                 case 0xC7: return GB(ClampToU16(this->t->supplied[CT_PASSENGERS].old_act), 8, 8);
 100                 case 0xC8: return ClampToU16(this->t->supplied[CT_MAIL].old_act);
 101                 case 0xC9: return GB(ClampToU16(this->t->supplied[CT_MAIL].old_act), 8, 8);
 102                 case 0xCA: return this->t->GetPercentTransported(CT_PASSENGERS);
 103                 case 0xCB: return this->t->GetPercentTransported(CT_MAIL);
 104                 case 0xCC: return this->t->received[TE_FOOD].new_act;
 105                 case 0xCD: return GB(this->t->received[TE_FOOD].new_act, 8, 8);
 106                 case 0xCE: return this->t->received[TE_WATER].new_act;
 107                 case 0xCF: return GB(this->t->received[TE_WATER].new_act, 8, 8);
 108                 case 0xD0: return this->t->received[TE_FOOD].old_act;
 109                 case 0xD1: return GB(this->t->received[TE_FOOD].old_act, 8, 8);
 110                 case 0xD2: return this->t->received[TE_WATER].old_act;
 111                 case 0xD3: return GB(this->t->received[TE_WATER].old_act, 8, 8);
 112                 case 0xD4: return this->t->road_build_months;
 113                 case 0xD5: return this->t->fund_buildings_months;
 114         }
 115
 116         DEBUG(grf, 1, "Unhandled town variable 0x%X", variable);
 117
 118         *available = false;
 119         return UINT_MAX;
 120 }
 121
 122 /* virtual */ void TownScopeResolver::StorePSA(uint pos, int32 value)
 123 {
 124         if (this->readonly) return;
 125
 126         assert(this->t != nullptr);
 127         /* We can't store anything if the caller has no #GRFFile. */
 128         if (this->ro.grffile == nullptr) return;
 129
 130         /* Check the persistent storage for the GrfID stored in register 100h. */
 131         uint32 grfid = GetRegister(0x100);
 132
 133         /* A NewGRF can only write in the persistent storage associated to its own GRFID. */
 134         if (grfid == 0xFFFFFFFF) grfid = this->ro.grffile->grfid;
 135         if (grfid != this->ro.grffile->grfid) return;
 136
 137         /* Check if the storage exists. */
 138         std::list<PersistentStorage *>::iterator iter;
 139         for (iter = t->psa_list.begin(); iter != t->psa_list.end(); iter++) {
 140                 if ((*iter)->grfid == grfid) {
 141                         (*iter)->StoreValue(pos, value);
 142                         return;
 143                 }
 144         }
 145
 146         /* Create a new storage. */
 147         assert(PersistentStorage::CanAllocateItem());
 148         PersistentStorage *psa = new PersistentStorage(grfid, GSF_FAKE_TOWNS, this->t->xy);
 149         psa->StoreValue(pos, value);
 150         t->psa_list.push_back(psa);
 151 }
 152
 153 /**
 154  * Resolver for a town.
 155  * @param grffile NewGRF file associated with the town.
 156  * @param t %Town of the scope.
 157  * @param readonly Scope may change persistent storage of the town.
 158  */
 159 TownResolverObject::TownResolverObject(const struct GRFFile *grffile, Town *t, bool readonly)
 160                 : ResolverObject(grffile), town_scope(*this, t, readonly)
 161 {
 162 }
 163