newgrf_townname.cpp

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00001 /* $Id: newgrf_townname.cpp 15299 2009-01-31 20:16:06Z smatz $ */
00002 
00009 #include "stdafx.h"
00010 #include "newgrf_townname.h"
00011 #include "core/alloc_func.hpp"
00012 #include "string_func.h"
00013 
00014 static GRFTownName *_grf_townnames = NULL;
00015 
00016 GRFTownName *GetGRFTownName(uint32 grfid)
00017 {
00018   GRFTownName *t = _grf_townnames;
00019   for (; t != NULL; t = t->next) {
00020     if (t->grfid == grfid) return t;
00021   }
00022   return NULL;
00023 }
00024 
00025 GRFTownName *AddGRFTownName(uint32 grfid)
00026 {
00027   GRFTownName *t = GetGRFTownName(grfid);
00028   if (t == NULL) {
00029     t = CallocT<GRFTownName>(1);
00030     t->grfid = grfid;
00031     t->next = _grf_townnames;
00032     _grf_townnames = t;
00033   }
00034   return t;
00035 }
00036 
00037 void DelGRFTownName(uint32 grfid)
00038 {
00039   GRFTownName *t = _grf_townnames;
00040   GRFTownName *p = NULL;
00041   for (;t != NULL; p = t, t = t->next) if (t->grfid == grfid) break;
00042   if (t != NULL) {
00043     for (int i = 0; i < 128; i++) {
00044       for (int j = 0; j < t->nbparts[i]; j++) {
00045         for (int k = 0; k < t->partlist[i][j].partcount; k++) {
00046           if (!HasBit(t->partlist[i][j].parts[k].prob, 7)) free(t->partlist[i][j].parts[k].data.text);
00047         }
00048         free(t->partlist[i][j].parts);
00049       }
00050       free(t->partlist[i]);
00051     }
00052     if (p != NULL) {
00053       p->next = t->next;
00054     } else {
00055       _grf_townnames = t->next;
00056     }
00057     free(t);
00058   }
00059 }
00060 
00061 static char *RandomPart(char *buf, GRFTownName *t, uint32 seed, byte id, const char *last)
00062 {
00063   assert(t != NULL);
00064   for (int i = 0; i < t->nbparts[id]; i++) {
00065     byte count = t->partlist[id][i].bitcount;
00066     uint16 maxprob = t->partlist[id][i].maxprob;
00067     uint32 r = (GB(seed, t->partlist[id][i].bitstart, count) * maxprob) >> count;
00068     for (int j = 0; j < t->partlist[id][i].partcount; j++) {
00069       byte prob = t->partlist[id][i].parts[j].prob;
00070       maxprob -= GB(prob, 0, 7);
00071       if (maxprob > r) continue;
00072       if (HasBit(prob, 7)) {
00073         buf = RandomPart(buf, t, seed, t->partlist[id][i].parts[j].data.id, last);
00074       } else {
00075         buf = strecat(buf, t->partlist[id][i].parts[j].data.text, last);
00076       }
00077       break;
00078     }
00079   }
00080   return buf;
00081 }
00082 
00083 char *GRFTownNameGenerate(char *buf, uint32 grfid, uint16 gen, uint32 seed, const char *last)
00084 {
00085   strecpy(buf, "", last);
00086   for (GRFTownName *t = _grf_townnames; t != NULL; t = t->next) {
00087     if (t->grfid == grfid) {
00088       assert(gen < t->nb_gen);
00089       buf = RandomPart(buf, t, seed, t->id[gen], last);
00090       break;
00091     }
00092   }
00093   return buf;
00094 }
00095 
00096 StringID *GetGRFTownNameList()
00097 {
00098   int nb_names = 0, n = 0;
00099   for (GRFTownName *t = _grf_townnames; t != NULL; t = t->next) nb_names += t->nb_gen;
00100   StringID *list = MallocT<StringID>(nb_names + 1);
00101   for (GRFTownName *t = _grf_townnames; t != NULL; t = t->next) {
00102     for (int j = 0; j < t->nb_gen; j++) list[n++] = t->name[j];
00103   }
00104   list[n] = INVALID_STRING_ID;
00105   return list;
00106 }
00107 
00108 void CleanUpGRFTownNames()
00109 {
00110   while (_grf_townnames != NULL) DelGRFTownName(_grf_townnames->grfid);
00111 }
00112 
00113 uint32 GetGRFTownNameId(int gen)
00114 {
00115   for (GRFTownName *t = _grf_townnames; t != NULL; t = t->next) {
00116     if (gen < t->nb_gen) return t->grfid;
00117     gen -= t->nb_gen;
00118   }
00119   /* Fallback to no NewGRF */
00120   return 0;
00121 }
00122 
00123 uint16 GetGRFTownNameType(int gen)
00124 {
00125   for (GRFTownName *t = _grf_townnames; t != NULL; t = t->next) {
00126     if (gen < t->nb_gen) return gen;
00127     gen -= t->nb_gen;
00128   }
00129   /* Fallback to english original */
00130   return SPECSTR_TOWNNAME_ENGLISH;
00131 }

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