currency.cpp

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00001 /* $Id: currency.cpp 11834 2008-01-13 14:37:30Z rubidium $ */
00002 
00005 #include "stdafx.h"
00006 #include "openttd.h"
00007 #include "currency.h"
00008 #include "news.h"
00009 #include "settings_type.h"
00010 #include "date_func.h"
00011 
00012 #include "table/strings.h"
00013 
00014   //   exchange rate    prefix             symbol_pos
00015   //   |  separator        |     postfix   |
00016   //   |   |    Euro year  |       |       |    name
00017   //   |   |    |          |       |       |    |
00018 static const CurrencySpec origin_currency_specs[NUM_CURRENCY] = {
00019   {    1, ',', CF_NOEURO, "£",    "",      0,  STR_CURR_GBP    }, 
00020   {    2, ',', CF_NOEURO, "$",    "",      0,  STR_CURR_USD    }, 
00021   {    2, ',', CF_ISEURO, "€",    "",      0,  STR_CURR_EUR    }, 
00022   {  220, ',', CF_NOEURO, "¥",    "",      0,  STR_CURR_YEN    }, 
00023   {   20, ',', 2002,      "",     " S.",   1,  STR_CURR_ATS    }, 
00024   {   59, ',', 2002,      "BEF ", "",      0,  STR_CURR_BEF    }, 
00025   {    2, ',', CF_NOEURO, "CHF ", "",      0,  STR_CURR_CHF    }, 
00026   {   41, ',', CF_NOEURO, "",     " Kč",   1,  STR_CURR_CZK    }, 
00027   {    3, '.', 2002,      "DM ",  "",      0,  STR_CURR_DEM    }, 
00028   {   11, '.', CF_NOEURO, "",     " kr",   1,  STR_CURR_DKK    }, 
00029   {  245, '.', 2002,      "Pts ", "",      0,  STR_CURR_ESP    }, 
00030   {    9, ',', 2002,      "",     " mk",   1,  STR_CURR_FIM    }, 
00031   {   10, '.', 2002,      "FF ",  "",      0,  STR_CURR_FRF    }, 
00032   {  500, ',', 2002,      "",     "Dr.",   1,  STR_CURR_GRD    }, 
00033   {  378, ',', 2010,      "",     " Ft",   1,  STR_CURR_HUF    }, 
00034   {  130, '.', CF_NOEURO, "",     " Kr",   1,  STR_CURR_ISK    }, 
00035   { 2850, ',', 2002,      "",     " L.",   1,  STR_CURR_ITL    }, 
00036   {    3, ',', 2002,      "NLG ", "",      0,  STR_CURR_NLG    }, 
00037   {   12, '.', CF_NOEURO, "",     " Kr",   1,  STR_CURR_NOK    }, 
00038   {    6, ' ', CF_NOEURO, "",     " zl",   1,  STR_CURR_PLN    }, 
00039   {    5, '.', CF_NOEURO, "",     " Lei",  1,  STR_CURR_ROL    }, 
00040   {   50, ' ', CF_NOEURO, "",     " p",    1,  STR_CURR_RUR    }, 
00041   {  352, '.', CF_NOEURO, "",     " SIT",  1,  STR_CURR_SIT    }, 
00042   {   13, '.', CF_NOEURO, "",     " Kr",   1,  STR_CURR_SEK    }, 
00043   {    3, '.', CF_NOEURO, "",     " YTL",  1,  STR_CURR_YTL    }, 
00044   {   52, ',', CF_NOEURO, "",     " Sk",   1,  STR_CURR_SKK    }, 
00045   {    4, ',', CF_NOEURO, "R$ ",  "",      0,  STR_CURR_BRR    }, 
00046   {    1, ' ', CF_NOEURO, "",     "",      2,  STR_CURR_CUSTOM }, 
00047 };
00048 
00049 /* Array of currencies used by the system */
00050 CurrencySpec _currency_specs[NUM_CURRENCY];
00051 
00058 enum {
00059   CURR_GBP,
00060   CURR_USD,
00061   CURR_EUR,
00062   CURR_YEN,
00063   CURR_ATS,
00064   CURR_BEF,
00065   CURR_CHF,
00066   CURR_CZK,
00067   CURR_DEM,
00068   CURR_DKK,
00069   CURR_ESP,
00070   CURR_FIM,
00071   CURR_FRF,
00072   CURR_GRD,
00073   CURR_HUF,
00074   CURR_ISK,
00075   CURR_ITL,
00076   CURR_NLG,
00077   CURR_NOK,
00078   CURR_PLN,
00079   CURR_ROL,
00080   CURR_RUR,
00081   CURR_SIT,
00082   CURR_SEK,
00083   CURR_YTL,
00084 };
00085 
00092 const byte TTDPatch_To_OTTDIndex[] =
00093 {
00094   CURR_GBP,
00095   CURR_USD,
00096   CURR_FRF,
00097   CURR_DEM,
00098   CURR_YEN,
00099   CURR_ESP,
00100   CURR_HUF,
00101   CURR_PLN,
00102   CURR_ATS,
00103   CURR_BEF,
00104   CURR_DKK,
00105   CURR_FIM,
00106   CURR_GRD,
00107   CURR_CHF,
00108   CURR_NLG,
00109   CURR_ITL,
00110   CURR_SEK,
00111   CURR_RUR,
00112   CURR_EUR,
00113 };
00114 
00123 byte GetNewgrfCurrencyIdConverted(byte grfcurr_id)
00124 {
00125   return (grfcurr_id >= lengthof(TTDPatch_To_OTTDIndex)) ? grfcurr_id : TTDPatch_To_OTTDIndex[grfcurr_id];
00126 }
00127 
00132 uint GetMaskOfAllowedCurrencies()
00133 {
00134   uint mask = 0;
00135   uint i;
00136 
00137   for (i = 0; i < NUM_CURRENCY; i++) {
00138     Year to_euro = _currency_specs[i].to_euro;
00139 
00140     if (to_euro != CF_NOEURO && to_euro != CF_ISEURO && _cur_year >= to_euro) continue;
00141     if (to_euro == CF_ISEURO && _cur_year < 2000) continue;
00142     mask |= (1 << i);
00143   }
00144   mask |= (1 << CUSTOM_CURRENCY_ID); // always allow custom currency
00145   return mask;
00146 }
00147 
00151 void CheckSwitchToEuro()
00152 {
00153   if (_currency_specs[_opt.currency].to_euro != CF_NOEURO &&
00154       _currency_specs[_opt.currency].to_euro != CF_ISEURO &&
00155       _cur_year >= _currency_specs[_opt.currency].to_euro) {
00156     _opt.currency = 2; // this is the index of euro above.
00157     AddNewsItem(STR_EURO_INTRODUCE, NEWS_FLAGS(NM_NORMAL, 0, NT_ECONOMY, 0), 0, 0);
00158   }
00159 }
00160 
00170 void ResetCurrencies(bool preserve_custom)
00171 {
00172   memcpy(&_currency_specs, &origin_currency_specs, sizeof(origin_currency_specs) - (preserve_custom ? sizeof(_custom_currency) : 0));
00173 }
00174 
00179 StringID* BuildCurrencyDropdown()
00180 {
00181   /* Allow room for all currencies, plus a terminator entry */
00182   static StringID names[NUM_CURRENCY + 1];
00183   uint i;
00184 
00185   /* Add each name */
00186   for (i = 0; i < NUM_CURRENCY; i++) {
00187     names[i] = _currency_specs[i].name;
00188   }
00189   /* Terminate the list */
00190   names[i] = INVALID_STRING_ID;
00191 
00192   return names;
00193 }

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