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/*
* This file is part of OpenTTD.
* 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.
* 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.
* 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/>.
*/
/**
* @file newgrf_townname.cpp
* Implementation of Action 0F "universal holder" structure and functions.
* This file implements a linked-lists of townname generators,
* holding everything that the newgrf action 0F will send over to OpenTTD.
*/
#include "stdafx.h"
#include "newgrf_townname.h"
#include "core/alloc_func.hpp"
#include "string_func.h"
#include "table/strings.h"
#include "safeguards.h"
static GRFTownName *_grf_townnames = nullptr;
static std::vector<StringID> _grf_townname_names;
GRFTownName *GetGRFTownName(uint32 grfid)
{
GRFTownName *t = _grf_townnames;
for (; t != nullptr; t = t->next) {
if (t->grfid == grfid) return t;
}
return nullptr;
}
GRFTownName *AddGRFTownName(uint32 grfid)
{
GRFTownName *t = GetGRFTownName(grfid);
if (t == nullptr) {
t = CallocT<GRFTownName>(1);
t->grfid = grfid;
t->next = _grf_townnames;
_grf_townnames = t;
}
return t;
}
void DelGRFTownName(uint32 grfid)
{
GRFTownName *t = _grf_townnames;
GRFTownName *p = nullptr;
for (;t != nullptr; p = t, t = t->next) if (t->grfid == grfid) break;
if (t != nullptr) {
for (int i = 0; i < 128; i++) {
for (int j = 0; j < t->nbparts[i]; j++) {
for (int k = 0; k < t->partlist[i][j].partcount; k++) {
if (!HasBit(t->partlist[i][j].parts[k].prob, 7)) free(t->partlist[i][j].parts[k].data.text);
}
free(t->partlist[i][j].parts);
}
free(t->partlist[i]);
}
if (p != nullptr) {
p->next = t->next;
} else {
_grf_townnames = t->next;
}
free(t);
}
}
static char *RandomPart(char *buf, GRFTownName *t, uint32 seed, byte id, const char *last)
{
assert(t != nullptr);
for (int i = 0; i < t->nbparts[id]; i++) {
byte count = t->partlist[id][i].bitcount;
uint16 maxprob = t->partlist[id][i].maxprob;
uint32 r = (GB(seed, t->partlist[id][i].bitstart, count) * maxprob) >> count;
for (int j = 0; j < t->partlist[id][i].partcount; j++) {
byte prob = t->partlist[id][i].parts[j].prob;
maxprob -= GB(prob, 0, 7);
if (maxprob > r) continue;
if (HasBit(prob, 7)) {
buf = RandomPart(buf, t, seed, t->partlist[id][i].parts[j].data.id, last);
} else {
buf = strecat(buf, t->partlist[id][i].parts[j].data.text, last);
}
break;
}
}
return buf;
}
char *GRFTownNameGenerate(char *buf, uint32 grfid, uint16 gen, uint32 seed, const char *last)
{
strecpy(buf, "", last);
for (GRFTownName *t = _grf_townnames; t != nullptr; t = t->next) {
if (t->grfid == grfid) {
assert(gen < t->nb_gen);
buf = RandomPart(buf, t, seed, t->id[gen], last);
break;
}
}
return buf;
}
/** Allocate memory for the NewGRF town names. */
void InitGRFTownGeneratorNames()
{
_grf_townname_names.clear();
for (GRFTownName *t = _grf_townnames; t != nullptr; t = t->next) {
for (int j = 0; j < t->nb_gen; j++) _grf_townname_names.push_back(t->name[j]);
}
}
const std::vector<StringID>& GetGRFTownNameList()
{
return _grf_townname_names;
}
StringID GetGRFTownNameName(uint gen)
{
return gen < _grf_townname_names.size() ? _grf_townname_names[gen] : STR_UNDEFINED;
}
void CleanUpGRFTownNames()
{
while (_grf_townnames != nullptr) DelGRFTownName(_grf_townnames->grfid);
}
uint32 GetGRFTownNameId(int gen)
{
for (GRFTownName *t = _grf_townnames; t != nullptr; t = t->next) {
if (gen < t->nb_gen) return t->grfid;
gen -= t->nb_gen;
}
/* Fallback to no NewGRF */
return 0;
}
uint16 GetGRFTownNameType(int gen)
{
for (GRFTownName *t = _grf_townnames; t != nullptr; t = t->next) {
if (gen < t->nb_gen) return gen;
gen -= t->nb_gen;
}
/* Fallback to english original */
return SPECSTR_TOWNNAME_ENGLISH;
}
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