currency.cpp

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/* $Id: currency.cpp 14595 2008-11-19 16:17:42Z rubidium $ */

#include "stdafx.h"
#include "openttd.h"
#include "currency.h"
#include "news_func.h"
#include "settings_type.h"
#include "date_func.h"

#include "table/strings.h"

  //   exchange rate    prefix             symbol_pos
  //   |  separator        |     postfix   |
  //   |   |    Euro year  |       |       |    name
  //   |   |    |          |       |       |    |
static const CurrencySpec origin_currency_specs[NUM_CURRENCY] = {
  {    1, ',', CF_NOEURO, "£",    "",      0,  STR_CURR_GBP    }, 
  {    2, ',', CF_NOEURO, "$",    "",      0,  STR_CURR_USD    }, 
  {    2, ',', CF_ISEURO, "€",    "",      0,  STR_CURR_EUR    }, 
  {  220, ',', CF_NOEURO, "¥",    "",      0,  STR_CURR_YEN    }, 
  {   20, ',', 2002,      "",     " S.",   1,  STR_CURR_ATS    }, 
  {   59, ',', 2002,      "BEF ", "",      0,  STR_CURR_BEF    }, 
  {    2, ',', CF_NOEURO, "CHF ", "",      0,  STR_CURR_CHF    }, 
  {   41, ',', CF_NOEURO, "",     " Kč",   1,  STR_CURR_CZK    }, 
  {    3, '.', 2002,      "DM ",  "",      0,  STR_CURR_DEM    }, 
  {   11, '.', CF_NOEURO, "",     " kr",   1,  STR_CURR_DKK    }, 
  {  245, '.', 2002,      "Pts ", "",      0,  STR_CURR_ESP    }, 
  {    9, ',', 2002,      "",     " mk",   1,  STR_CURR_FIM    }, 
  {   10, '.', 2002,      "FF ",  "",      0,  STR_CURR_FRF    }, 
  {  500, ',', 2002,      "",     "Dr.",   1,  STR_CURR_GRD    }, 
  {  378, ',', 2010,      "",     " Ft",   1,  STR_CURR_HUF    }, 
  {  130, '.', CF_NOEURO, "",     " Kr",   1,  STR_CURR_ISK    }, 
  { 2850, ',', 2002,      "",     " L.",   1,  STR_CURR_ITL    }, 
  {    3, ',', 2002,      "NLG ", "",      0,  STR_CURR_NLG    }, 
  {   12, '.', CF_NOEURO, "",     " Kr",   1,  STR_CURR_NOK    }, 
  {    6, ' ', CF_NOEURO, "",     " zl",   1,  STR_CURR_PLN    }, 
  {    5, '.', CF_NOEURO, "",     " Lei",  1,  STR_CURR_ROL    }, 
  {   50, ' ', CF_NOEURO, "",     " p",    1,  STR_CURR_RUR    }, 
  {  352, '.', 2007,      "",     " SIT",  1,  STR_CURR_SIT    }, 
  {   13, '.', CF_NOEURO, "",     " Kr",   1,  STR_CURR_SEK    }, 
  {    3, '.', CF_NOEURO, "",     " YTL",  1,  STR_CURR_YTL    }, 
  {   52, ',', CF_NOEURO, "",     " Sk",   1,  STR_CURR_SKK    }, 
  {    4, ',', CF_NOEURO, "R$ ",  "",      0,  STR_CURR_BRL    }, 
  {   20, '.', CF_NOEURO, "",     " EEK",  1,  STR_CURR_EEK    }, 
  {    1, ' ', CF_NOEURO, "",     "",      2,  STR_CURR_CUSTOM }, 
};

/* Array of currencies used by the system */
CurrencySpec _currency_specs[NUM_CURRENCY];

enum {
  CURR_GBP,
  CURR_USD,
  CURR_EUR,
  CURR_YEN,
  CURR_ATS,
  CURR_BEF,
  CURR_CHF,
  CURR_CZK,
  CURR_DEM,
  CURR_DKK,
  CURR_ESP,
  CURR_FIM,
  CURR_FRF,
  CURR_GRD,
  CURR_HUF,
  CURR_ISK,
  CURR_ITL,
  CURR_NLG,
  CURR_NOK,
  CURR_PLN,
  CURR_ROL,
  CURR_RUR,
  CURR_SIT,
  CURR_SEK,
  CURR_YTL,
  CURR_SKK,
  CURR_BRL,
  CURR_EEK,
};

const byte TTDPatch_To_OTTDIndex[] =
{
  CURR_GBP,
  CURR_USD,
  CURR_FRF,
  CURR_DEM,
  CURR_YEN,
  CURR_ESP,
  CURR_HUF,
  CURR_PLN,
  CURR_ATS,
  CURR_BEF,
  CURR_DKK,
  CURR_FIM,
  CURR_GRD,
  CURR_CHF,
  CURR_NLG,
  CURR_ITL,
  CURR_SEK,
  CURR_RUR,
  CURR_EUR,
};

byte GetNewgrfCurrencyIdConverted(byte grfcurr_id)
{
  return (grfcurr_id >= lengthof(TTDPatch_To_OTTDIndex)) ? grfcurr_id : TTDPatch_To_OTTDIndex[grfcurr_id];
}

uint GetMaskOfAllowedCurrencies()
{
  uint mask = 0;
  uint i;

  for (i = 0; i < NUM_CURRENCY; i++) {
    Year to_euro = _currency_specs[i].to_euro;

    if (to_euro != CF_NOEURO && to_euro != CF_ISEURO && _cur_year >= to_euro) continue;
    if (to_euro == CF_ISEURO && _cur_year < 2000) continue;
    mask |= (1 << i);
  }
  mask |= (1 << CUSTOM_CURRENCY_ID); // always allow custom currency
  return mask;
}

void CheckSwitchToEuro()
{
  if (_currency_specs[_settings_game.locale.currency].to_euro != CF_NOEURO &&
      _currency_specs[_settings_game.locale.currency].to_euro != CF_ISEURO &&
      _cur_year >= _currency_specs[_settings_game.locale.currency].to_euro) {
    _settings_game.locale.currency = 2; // this is the index of euro above.
    AddNewsItem(STR_EURO_INTRODUCE, NS_ECONOMY, 0, 0);
  }
}

void ResetCurrencies(bool preserve_custom)
{
  memcpy(&_currency_specs, &origin_currency_specs, sizeof(origin_currency_specs) - (preserve_custom ? sizeof(_custom_currency) : 0));
}

StringID* BuildCurrencyDropdown()
{
  /* Allow room for all currencies, plus a terminator entry */
  static StringID names[NUM_CURRENCY + 1];
  uint i;

  /* Add each name */
  for (i = 0; i < NUM_CURRENCY; i++) {
    names[i] = _currency_specs[i].name;
  }
  /* Terminate the list */
  names[i] = INVALID_STRING_ID;

  return names;
}