mirror of https://github.com/OpenTTD/OpenTTD.git
125 lines
3.5 KiB
C++
125 lines
3.5 KiB
C++
/*
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* This file is part of OpenTTD.
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* 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.
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* 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.
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* 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/>.
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*/
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/**
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* @file newgrf_townname.cpp
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* Implementation of Action 0F "universal holder" structure and functions.
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* This file implements a linked-lists of townname generators,
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* holding everything that the newgrf action 0F will send over to OpenTTD.
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*/
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#include "stdafx.h"
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#include "newgrf_townname.h"
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#include "core/alloc_func.hpp"
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#include "string_func.h"
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#include "strings_internal.h"
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#include "table/strings.h"
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#include "safeguards.h"
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static std::vector<GRFTownName> _grf_townnames;
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static std::vector<StringID> _grf_townname_names;
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GRFTownName *GetGRFTownName(uint32_t grfid)
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{
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auto found = std::find_if(std::begin(_grf_townnames), std::end(_grf_townnames), [&grfid](const GRFTownName &t) { return t.grfid == grfid; });
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if (found != std::end(_grf_townnames)) return &*found;
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return nullptr;
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}
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GRFTownName *AddGRFTownName(uint32_t grfid)
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{
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GRFTownName *t = GetGRFTownName(grfid);
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if (t == nullptr) {
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t = &_grf_townnames.emplace_back();
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t->grfid = grfid;
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}
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return t;
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}
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void DelGRFTownName(uint32_t grfid)
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{
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_grf_townnames.erase(std::find_if(std::begin(_grf_townnames), std::end(_grf_townnames), [&grfid](const GRFTownName &t) { return t.grfid == grfid; }));
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}
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static void RandomPart(StringBuilder &builder, const GRFTownName *t, uint32_t seed, uint8_t id)
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{
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assert(t != nullptr);
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for (const auto &partlist : t->partlists[id]) {
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uint8_t count = partlist.bitcount;
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uint16_t maxprob = partlist.maxprob;
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uint32_t r = (GB(seed, partlist.bitstart, count) * maxprob) >> count;
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for (const auto &part : partlist.parts) {
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maxprob -= GB(part.prob, 0, 7);
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if (maxprob > r) continue;
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if (HasBit(part.prob, 7)) {
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RandomPart(builder, t, seed, part.id);
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} else {
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builder += part.text;
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}
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break;
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}
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}
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}
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void GRFTownNameGenerate(StringBuilder &builder, uint32_t grfid, uint16_t gen, uint32_t seed)
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{
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const GRFTownName *t = GetGRFTownName(grfid);
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if (t != nullptr) {
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assert(gen < t->styles.size());
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RandomPart(builder, t, seed, t->styles[gen].id);
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}
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}
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/** Allocate memory for the NewGRF town names. */
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void InitGRFTownGeneratorNames()
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{
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_grf_townname_names.clear();
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for (const auto &t : _grf_townnames) {
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for (const auto &style : t.styles) {
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_grf_townname_names.push_back(style.name);
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}
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}
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}
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const std::vector<StringID> &GetGRFTownNameList()
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{
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return _grf_townname_names;
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}
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StringID GetGRFTownNameName(uint16_t gen)
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{
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return gen < _grf_townname_names.size() ? _grf_townname_names[gen] : STR_UNDEFINED;
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}
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void CleanUpGRFTownNames()
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{
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_grf_townnames.clear();
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}
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uint32_t GetGRFTownNameId(uint16_t gen)
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{
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for (const auto &t : _grf_townnames) {
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if (gen < t.styles.size()) return t.grfid;
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gen -= static_cast<uint16_t>(t.styles.size());
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}
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/* Fallback to no NewGRF */
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return 0;
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}
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uint16_t GetGRFTownNameType(uint16_t gen)
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{
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for (const auto &t : _grf_townnames) {
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if (gen < t.styles.size()) return gen;
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gen -= static_cast<uint16_t>(t.styles.size());
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}
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/* Fallback to english original */
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return SPECSTR_TOWNNAME_ENGLISH;
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}
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