strings_sl.cpp

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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/>.
 */
 
#include "../stdafx.h"
#include "../core/alloc_func.hpp"
#include "../string_func.h"
#include "../strings_func.h"
#include "saveload_internal.h"
#include <sstream>
 
#include "table/strings.h"
 
#include "../safeguards.h"
 
static const int NUM_OLD_STRINGS     = 512; 
static const int LEN_OLD_STRINGS     =  32; 
static const int LEN_OLD_STRINGS_TTO =  24; 
 
StringID RemapOldStringID(StringID s)
{
  switch (s) {
    case 0x0006: return STR_SV_EMPTY;
    case 0x7000: return STR_SV_UNNAMED;
    case 0x70E4: return SPECSTR_COMPANY_NAME_START;
    case 0x70E9: return SPECSTR_COMPANY_NAME_START;
    case 0x8864: return STR_SV_TRAIN_NAME;
    case 0x902B: return STR_SV_ROAD_VEHICLE_NAME;
    case 0x9830: return STR_SV_SHIP_NAME;
    case 0xA02F: return STR_SV_AIRCRAFT_NAME;
 
    default:
      if (IsInsideMM(s, 0x300F, 0x3030)) {
        return s - 0x300F + STR_SV_STNAME;
      } else {
        return s;
      }
  }
}
 
char *_old_name_array = nullptr;
 
std::string CopyFromOldName(StringID id)
{
  /* Is this name an (old) custom name? */
  if (GetStringTab(id) != TEXT_TAB_OLD_CUSTOM) return std::string();
 
  if (IsSavegameVersionBefore(SLV_37)) {
    uint offs = _savegame_type == SGT_TTO ? LEN_OLD_STRINGS_TTO * GB(id, 0, 8) : LEN_OLD_STRINGS * GB(id, 0, 9);
    const char *strfrom = &_old_name_array[offs];
 
    std::ostringstream tmp;
    std::ostreambuf_iterator<char> strto(tmp);
    for (; *strfrom != '\0'; strfrom++) {
      char32_t c = (uint8_t)*strfrom;
 
      /* Map from non-ISO8859-15 characters to UTF-8. */
      switch (c) {
        case 0xA4: c = 0x20AC; break; // Euro
        case 0xA6: c = 0x0160; break; // S with caron
        case 0xA8: c = 0x0161; break; // s with caron
        case 0xB4: c = 0x017D; break; // Z with caron
        case 0xB8: c = 0x017E; break; // z with caron
        case 0xBC: c = 0x0152; break; // OE ligature
        case 0xBD: c = 0x0153; break; // oe ligature
        case 0xBE: c = 0x0178; break; // Y with diaeresis
        default: break;
      }
 
      Utf8Encode(strto, c);
    }
 
    return tmp.str();
  } else {
    /* Name will already be in UTF-8. */
    return std::string(&_old_name_array[LEN_OLD_STRINGS * GB(id, 0, 9)]);
  }
}
 
void ResetOldNames()
{
  free(_old_name_array);
  _old_name_array = nullptr;
}
 
void InitializeOldNames()
{
  free(_old_name_array);
  _old_name_array = CallocT<char>(NUM_OLD_STRINGS * LEN_OLD_STRINGS); // 200 * 24 would be enough for TTO savegames
}
 
struct NAMEChunkHandler : ChunkHandler {
  NAMEChunkHandler() : ChunkHandler('NAME', CH_READONLY) {}
 
  void Load() const override
  {
    int index;
 
    while ((index = SlIterateArray()) != -1) {
      if (index >= NUM_OLD_STRINGS) SlErrorCorrupt("Invalid old name index");
      if (SlGetFieldLength() > (uint)LEN_OLD_STRINGS) SlErrorCorrupt("Invalid old name length");
 
      SlCopy(&_old_name_array[LEN_OLD_STRINGS * index], SlGetFieldLength(), SLE_UINT8);
      /* Make sure the old name is null terminated */
      _old_name_array[LEN_OLD_STRINGS * index + LEN_OLD_STRINGS - 1] = '\0';
    }
  }
};
 
static const NAMEChunkHandler NAME;
static const ChunkHandlerRef name_chunk_handlers[] = {
  NAME,
};
 
extern const ChunkHandlerTable _name_chunk_handlers(name_chunk_handlers);