src/newgrf_townname.cpp

   1 /*
   2  * This file is part of OpenTTD.
   3  * 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.
   4  * 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.
   5  * 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/>.
   6  */
   7
   8 /**
   9  * @file newgrf_townname.cpp
  10  * Implementation of  Action 0F "universal holder" structure and functions.
  11  * This file implements a linked-lists of townname generators,
  12  * holding everything that the newgrf action 0F will send over to OpenTTD.
  13  */
  14
  15 #include "stdafx.h"
  16 #include "newgrf_townname.h"
  17 #include "core/alloc_func.hpp"
  18 #include "string_func.h"
  19
  20 #include "safeguards.h"
  21
  22 static GRFTownName *_grf_townnames = nullptr;
  23
  24 GRFTownName *GetGRFTownName(uint32 grfid)
  25 {
  26         GRFTownName *t = _grf_townnames;
  27         for (; t != nullptr; t = t->next) {
  28                 if (t->grfid == grfid) return t;
  29         }
  30         return nullptr;
  31 }
  32
  33 GRFTownName *AddGRFTownName(uint32 grfid)
  34 {
  35         GRFTownName *t = GetGRFTownName(grfid);
  36         if (t == nullptr) {
  37                 t = CallocT<GRFTownName>(1);
  38                 t->grfid = grfid;
  39                 t->next = _grf_townnames;
  40                 _grf_townnames = t;
  41         }
  42         return t;
  43 }
  44
  45 void DelGRFTownName(uint32 grfid)
  46 {
  47         GRFTownName *t = _grf_townnames;
  48         GRFTownName *p = nullptr;
  49         for (;t != nullptr; p = t, t = t->next) if (t->grfid == grfid) break;
  50         if (t != nullptr) {
  51                 for (int i = 0; i < 128; i++) {
  52                         for (int j = 0; j < t->nbparts[i]; j++) {
  53                                 for (int k = 0; k < t->partlist[i][j].partcount; k++) {
  54                                         if (!HasBit(t->partlist[i][j].parts[k].prob, 7)) free(t->partlist[i][j].parts[k].data.text);
  55                                 }
  56                                 free(t->partlist[i][j].parts);
  57                         }
  58                         free(t->partlist[i]);
  59                 }
  60                 if (p != nullptr) {
  61                         p->next = t->next;
  62                 } else {
  63                         _grf_townnames = t->next;
  64                 }
  65                 free(t);
  66         }
  67 }
  68
  69 static char *RandomPart(char *buf, GRFTownName *t, uint32 seed, byte id, const char *last)
  70 {
  71         assert(t != nullptr);
  72         for (int i = 0; i < t->nbparts[id]; i++) {
  73                 byte count = t->partlist[id][i].bitcount;
  74                 uint16 maxprob = t->partlist[id][i].maxprob;
  75                 uint32 r = (GB(seed, t->partlist[id][i].bitstart, count) * maxprob) >> count;
  76                 for (int j = 0; j < t->partlist[id][i].partcount; j++) {
  77                         byte prob = t->partlist[id][i].parts[j].prob;
  78                         maxprob -= GB(prob, 0, 7);
  79                         if (maxprob > r) continue;
  80                         if (HasBit(prob, 7)) {
  81                                 buf = RandomPart(buf, t, seed, t->partlist[id][i].parts[j].data.id, last);
  82                         } else {
  83                                 buf = strecat(buf, t->partlist[id][i].parts[j].data.text, last);
  84                         }
  85                         break;
  86                 }
  87         }
  88         return buf;
  89 }
  90
  91 char *GRFTownNameGenerate(char *buf, uint32 grfid, uint16 gen, uint32 seed, const char *last)
  92 {
  93         strecpy(buf, "", last);
  94         for (GRFTownName *t = _grf_townnames; t != nullptr; t = t->next) {
  95                 if (t->grfid == grfid) {
  96                         assert(gen < t->nb_gen);
  97                         buf = RandomPart(buf, t, seed, t->id[gen], last);
  98                         break;
  99                 }
 100         }
 101         return buf;
 102 }
 103
 104 StringID *GetGRFTownNameList()
 105 {
 106         int nb_names = 0, n = 0;
 107         for (GRFTownName *t = _grf_townnames; t != nullptr; t = t->next) nb_names += t->nb_gen;
 108         StringID *list = MallocT<StringID>(nb_names + 1);
 109         for (GRFTownName *t = _grf_townnames; t != nullptr; t = t->next) {
 110                 for (int j = 0; j < t->nb_gen; j++) list[n++] = t->name[j];
 111         }
 112         list[n] = INVALID_STRING_ID;
 113         return list;
 114 }
 115
 116 void CleanUpGRFTownNames()
 117 {
 118         while (_grf_townnames != nullptr) DelGRFTownName(_grf_townnames->grfid);
 119 }
 120
 121 uint32 GetGRFTownNameId(int gen)
 122 {
 123         for (GRFTownName *t = _grf_townnames; t != nullptr; t = t->next) {
 124                 if (gen < t->nb_gen) return t->grfid;
 125                 gen -= t->nb_gen;
 126         }
 127         /* Fallback to no NewGRF */
 128         return 0;
 129 }
 130
 131 uint16 GetGRFTownNameType(int gen)
 132 {
 133         for (GRFTownName *t = _grf_townnames; t != nullptr; t = t->next) {
 134                 if (gen < t->nb_gen) return gen;
 135                 gen -= t->nb_gen;
 136         }
 137         /* Fallback to english original */
 138         return SPECSTR_TOWNNAME_ENGLISH;
 139 }