mirror of https://github.com/OpenTTD/OpenTTD.git
141 lines
4.4 KiB
C++
141 lines
4.4 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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/** @file strings_sl.cpp Code handling saving and loading of strings */
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#include "../stdafx.h"
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#include "../core/alloc_func.hpp"
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#include "../string_func.h"
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#include "../strings_func.h"
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#include "saveload_internal.h"
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#include <sstream>
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#include "table/strings.h"
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#include "../safeguards.h"
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static const int NUM_OLD_STRINGS = 512; ///< The number of custom strings stored in old savegames.
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static const int LEN_OLD_STRINGS = 32; ///< The number of characters per string.
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static const int LEN_OLD_STRINGS_TTO = 24; ///< The number of characters per string in TTO savegames.
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/**
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* Remap a string ID from the old format to the new format
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* @param s StringID that requires remapping
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* @return translated ID
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*/
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StringID RemapOldStringID(StringID s)
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{
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switch (s) {
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case 0x0006: return STR_SV_EMPTY;
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case 0x7000: return STR_SV_UNNAMED;
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case 0x70E4: return SPECSTR_COMPANY_NAME_START;
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case 0x70E9: return SPECSTR_COMPANY_NAME_START;
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case 0x8864: return STR_SV_TRAIN_NAME;
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case 0x902B: return STR_SV_ROAD_VEHICLE_NAME;
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case 0x9830: return STR_SV_SHIP_NAME;
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case 0xA02F: return STR_SV_AIRCRAFT_NAME;
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default:
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if (IsInsideMM(s, 0x300F, 0x3030)) {
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return s - 0x300F + STR_SV_STNAME;
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} else {
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return s;
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}
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}
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}
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/** Location to load the old names to. */
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char *_old_name_array = nullptr;
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/**
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* Copy and convert old custom names to UTF-8.
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* They were all stored in a 512 by 32 (200 by 24 for TTO) long string array
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* and are now stored with stations, waypoints and other places with names.
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* @param id the StringID of the custom name to clone.
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* @return the clones custom name.
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*/
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std::string CopyFromOldName(StringID id)
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{
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/* Is this name an (old) custom name? */
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if (GetStringTab(id) != TEXT_TAB_OLD_CUSTOM) return std::string();
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if (IsSavegameVersionBefore(SLV_37)) {
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uint offs = _savegame_type == SGT_TTO ? LEN_OLD_STRINGS_TTO * GB(id, 0, 8) : LEN_OLD_STRINGS * GB(id, 0, 9);
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const char *strfrom = &_old_name_array[offs];
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std::ostringstream tmp;
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std::ostreambuf_iterator<char> strto(tmp);
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for (; *strfrom != '\0'; strfrom++) {
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char32_t c = (uint8_t)*strfrom;
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/* Map from non-ISO8859-15 characters to UTF-8. */
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switch (c) {
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case 0xA4: c = 0x20AC; break; // Euro
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case 0xA6: c = 0x0160; break; // S with caron
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case 0xA8: c = 0x0161; break; // s with caron
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case 0xB4: c = 0x017D; break; // Z with caron
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case 0xB8: c = 0x017E; break; // z with caron
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case 0xBC: c = 0x0152; break; // OE ligature
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case 0xBD: c = 0x0153; break; // oe ligature
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case 0xBE: c = 0x0178; break; // Y with diaeresis
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default: break;
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}
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Utf8Encode(strto, c);
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}
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return tmp.str();
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} else {
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/* Name will already be in UTF-8. */
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return std::string(&_old_name_array[LEN_OLD_STRINGS * GB(id, 0, 9)]);
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}
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}
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/**
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* Free the memory of the old names array.
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* Should be called once the old names have all been converted.
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*/
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void ResetOldNames()
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{
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free(_old_name_array);
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_old_name_array = nullptr;
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}
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/**
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* Initialize the old names table memory.
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*/
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void InitializeOldNames()
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{
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free(_old_name_array);
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_old_name_array = CallocT<char>(NUM_OLD_STRINGS * LEN_OLD_STRINGS); // 200 * 24 would be enough for TTO savegames
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}
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struct NAMEChunkHandler : ChunkHandler {
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NAMEChunkHandler() : ChunkHandler('NAME', CH_READONLY) {}
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void Load() const override
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{
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int index;
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while ((index = SlIterateArray()) != -1) {
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if (index >= NUM_OLD_STRINGS) SlErrorCorrupt("Invalid old name index");
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if (SlGetFieldLength() > (uint)LEN_OLD_STRINGS) SlErrorCorrupt("Invalid old name length");
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SlCopy(&_old_name_array[LEN_OLD_STRINGS * index], SlGetFieldLength(), SLE_UINT8);
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/* Make sure the old name is null terminated */
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_old_name_array[LEN_OLD_STRINGS * index + LEN_OLD_STRINGS - 1] = '\0';
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}
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}
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};
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static const NAMEChunkHandler NAME;
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static const ChunkHandlerRef name_chunk_handlers[] = {
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NAME,
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};
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extern const ChunkHandlerTable _name_chunk_handlers(name_chunk_handlers);
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