# newgrf_townname.cpp

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    00001 /* $Id$ */
    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
    00016 #include "stdafx.h"
    00017 #include "newgrf_townname.h"
    00018 #include "core/alloc_func.hpp"
    00019 #include "string_func.h"
    00020
    00021 static GRFTownName *_grf_townnames = NULL;
    00022
    00023 GRFTownName *GetGRFTownName(uint32 grfid)
    00024 {
    00025   GRFTownName *t = _grf_townnames;
    00026   for (; t != NULL; t = t->next) {
    00027     if (t->grfid == grfid) return t;
    00028   }
    00029   return NULL;
    00030 }
    00031
    00032 GRFTownName *AddGRFTownName(uint32 grfid)
    00033 {
    00034   GRFTownName *t = GetGRFTownName(grfid);
    00035   if (t == NULL) {
    00036     t = CallocT<GRFTownName>(1);
    00037     t->grfid = grfid;
    00038     t->next = _grf_townnames;
    00039     _grf_townnames = t;
    00040   }
    00041   return t;
    00042 }
    00043
    00044 void DelGRFTownName(uint32 grfid)
    00045 {
    00046   GRFTownName *t = _grf_townnames;
    00047   GRFTownName *p = NULL;
    00048   for (;t != NULL; p = t, t = t->next) if (t->grfid == grfid) break;
    00049   if (t != NULL) {
    00050     for (int i = 0; i < 128; i++) {
    00051       for (int j = 0; j < t->nbparts[i]; j++) {
    00052         for (int k = 0; k < t->partlist[i][j].partcount; k++) {
    00053           if (!HasBit(t->partlist[i][j].parts[k].prob, 7)) free(t->partlist[i][j].parts[k].data.text);
    00054         }
    00055         free(t->partlist[i][j].parts);
    00056       }
    00057       free(t->partlist[i]);
    00058     }
    00059     if (p != NULL) {
    00060       p->next = t->next;
    00061     } else {
    00062       _grf_townnames = t->next;
    00063     }
    00064     free(t);
    00065   }
    00066 }
    00067
    00068 static char *RandomPart(char *buf, GRFTownName *t, uint32 seed, byte id, const char *last)
    00069 {
    00070   assert(t != NULL);
    00071   for (int i = 0; i < t->nbparts[id]; i++) {
    00072     byte count = t->partlist[id][i].bitcount;
    00073     uint16 maxprob = t->partlist[id][i].maxprob;
    00074     uint32 r = (GB(seed, t->partlist[id][i].bitstart, count) * maxprob) >> count;
    00075     for (int j = 0; j < t->partlist[id][i].partcount; j++) {
    00076       byte prob = t->partlist[id][i].parts[j].prob;
    00077       maxprob -= GB(prob, 0, 7);
    00078       if (maxprob > r) continue;
    00079       if (HasBit(prob, 7)) {
    00080         buf = RandomPart(buf, t, seed, t->partlist[id][i].parts[j].data.id, last);
    00081       } else {
    00082         buf = strecat(buf, t->partlist[id][i].parts[j].data.text, last);
    00083       }
    00084       break;
    00085     }
    00086   }
    00087   return buf;
    00088 }
    00089
    00090 char *GRFTownNameGenerate(char *buf, uint32 grfid, uint16 gen, uint32 seed, const char *last)
    00091 {
    00092   strecpy(buf, "", last);
    00093   for (GRFTownName *t = _grf_townnames; t != NULL; t = t->next) {
    00094     if (t->grfid == grfid) {
    00095       assert(gen < t->nb_gen);
    00096       buf = RandomPart(buf, t, seed, t->id[gen], last);
    00097       break;
    00098     }
    00099   }
    00100   return buf;
    00101 }
    00102
    00103 StringID *GetGRFTownNameList()
    00104 {
    00105   int nb_names = 0, n = 0;
    00106   for (GRFTownName *t = _grf_townnames; t != NULL; t = t->next) nb_names += t->nb_gen;
    00107   StringID *list = MallocT<StringID>(nb_names + 1);
    00108   for (GRFTownName *t = _grf_townnames; t != NULL; t = t->next) {
    00109     for (int j = 0; j < t->nb_gen; j++) list[n++] = t->name[j];
    00110   }
    00111   list[n] = INVALID_STRING_ID;
    00112   return list;
    00113 }
    00114
    00115 void CleanUpGRFTownNames()
    00116 {
    00117   while (_grf_townnames != NULL) DelGRFTownName(_grf_townnames->grfid);
    00118 }
    00119
    00120 uint32 GetGRFTownNameId(int gen)
    00121 {
    00122   for (GRFTownName *t = _grf_townnames; t != NULL; t = t->next) {
    00123     if (gen < t->nb_gen) return t->grfid;
    00124     gen -= t->nb_gen;
    00125   }
    00126   /* Fallback to no NewGRF */
    00127   return 0;
    00128 }
    00129
    00130 uint16 GetGRFTownNameType(int gen)
    00131 {
    00132   for (GRFTownName *t = _grf_townnames; t != NULL; t = t->next) {
    00133     if (gen < t->nb_gen) return gen;
    00134     gen -= t->nb_gen;
    00135   }
    00136   /* Fallback to english original */
    00137   return SPECSTR_TOWNNAME_ENGLISH;
    00138 }