newgrf_townname.cpp

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00001 /* $Id: newgrf_townname.cpp 11828 2008-01-13 01:21:35Z rubidium $ */
00002 
00009 #include "stdafx.h"
00010 #include "openttd.h"
00011 #include "newgrf_townname.h"
00012 #include "core/alloc_func.hpp"
00013 #include "string_func.h"
00014 
00015 #include "table/strings.h"
00016 
00017 static GRFTownName *_grf_townnames = NULL;
00018 
00019 GRFTownName *GetGRFTownName(uint32 grfid)
00020 {
00021   GRFTownName *t = _grf_townnames;
00022   for (; t != NULL; t = t->next) {
00023     if (t->grfid == grfid) return t;
00024   }
00025   return NULL;
00026 }
00027 
00028 GRFTownName *AddGRFTownName(uint32 grfid)
00029 {
00030   GRFTownName *t = GetGRFTownName(grfid);
00031   if (t == NULL) {
00032     t = CallocT<GRFTownName>(1);
00033     t->grfid = grfid;
00034     t->next = _grf_townnames;
00035     _grf_townnames = t;
00036   }
00037   return t;
00038 }
00039 
00040 void DelGRFTownName(uint32 grfid)
00041 {
00042   GRFTownName *t = _grf_townnames;
00043   GRFTownName *p = NULL;
00044   for (;t != NULL; p = t, t = t->next) if (t->grfid == grfid) break;
00045   if (t != NULL) {
00046     for (int i = 0; i < 128; i++) {
00047       for (int j = 0; j < t->nbparts[i]; j++) {
00048         for (int k = 0; k < t->partlist[i][j].partcount; k++) {
00049           if (!HasBit(t->partlist[i][j].parts[k].prob, 7)) free(t->partlist[i][j].parts[k].data.text);
00050         }
00051         free(t->partlist[i][j].parts);
00052       }
00053       free(t->partlist[i]);
00054     }
00055     if (p != NULL) {
00056       p->next = t->next;
00057     } else {
00058       _grf_townnames = t->next;
00059     }
00060     free(t);
00061   }
00062 }
00063 
00064 static char *RandomPart(char *buf, GRFTownName *t, uint32 seed, byte id, const char *last)
00065 {
00066   assert(t != NULL);
00067   for (int i = 0; i < t->nbparts[id]; i++) {
00068     byte count = t->partlist[id][i].bitcount;
00069     uint16 maxprob = t->partlist[id][i].maxprob;
00070     uint32 r = (GB(seed, t->partlist[id][i].bitstart, count) * maxprob) >> count;
00071     for (int j = 0; j < t->partlist[id][i].partcount; j++) {
00072       byte prob = t->partlist[id][i].parts[j].prob;
00073       maxprob -= GB(prob, 0, 7);
00074       if (maxprob > r) continue;
00075       if (HasBit(prob, 7)) {
00076         buf = RandomPart(buf, t, seed, t->partlist[id][i].parts[j].data.id, last);
00077       } else {
00078         buf = strecat(buf, t->partlist[id][i].parts[j].data.text, last);
00079       }
00080       break;
00081     }
00082   }
00083   return buf;
00084 }
00085 
00086 char *GRFTownNameGenerate(char *buf, uint32 grfid, uint16 gen, uint32 seed, const char *last)
00087 {
00088   strecpy(buf, "", last);
00089   for (GRFTownName *t = _grf_townnames; t != NULL; t = t->next) {
00090     if (t->grfid == grfid) {
00091       assert(gen < t->nb_gen);
00092       buf = RandomPart(buf, t, seed, t->id[gen], last);
00093       break;
00094     }
00095   }
00096   return buf;
00097 }
00098 
00099 StringID *GetGRFTownNameList()
00100 {
00101   int nb_names = 0, n = 0;
00102   for (GRFTownName *t = _grf_townnames; t != NULL; t = t->next) nb_names += t->nb_gen;
00103   StringID *list = MallocT<StringID>(nb_names + 1);
00104   for (GRFTownName *t = _grf_townnames; t != NULL; t = t->next) {
00105     for (int j = 0; j < t->nb_gen; j++) list[n++] = t->name[j];
00106   }
00107   list[n] = INVALID_STRING_ID;
00108   return list;
00109 }
00110 
00111 void CleanUpGRFTownNames()
00112 {
00113   while (_grf_townnames != NULL) DelGRFTownName(_grf_townnames->grfid);
00114 }
00115 
00116 uint32 GetGRFTownNameId(int gen)
00117 {
00118   for (GRFTownName *t = _grf_townnames; t != NULL; t = t->next) {
00119     if (gen < t->nb_gen) return t->grfid;
00120     gen -= t->nb_gen;
00121   }
00122   /* Fallback to no NewGRF */
00123   return 0;
00124 }
00125 
00126 uint16 GetGRFTownNameType(int gen)
00127 {
00128   for (GRFTownName *t = _grf_townnames; t != NULL; t = t->next) {
00129     if (gen < t->nb_gen) return gen;
00130     gen -= t->nb_gen;
00131   }
00132   /* Fallback to english original */
00133   return SPECSTR_TOWNNAME_ENGLISH;
00134 }

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