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235 lines
7.5 KiB
C
235 lines
7.5 KiB
C
/********************************************************************\
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* gnc-euro.c -- utilities for EURO currency *
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* *
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* Copyright (C) 2000 Herbert Thoma *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License as *
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* published by the Free Software Foundation; either version 2 of *
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* the License, or (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License*
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* along with this program; if not, write to the Free Software *
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
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* *
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\********************************************************************/
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#include <config.h>
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#include "gnc-euro.h"
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#include <glib/gi18n.h>
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#include <math.h>
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#include <stdlib.h>
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#include <string.h>
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#include "gnc-ui-util.h"
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/* local structs */
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typedef struct
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{
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const char *currency;
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double rate;
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} gnc_euro_rate_struct;
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/* This array MUST be sorted ! */
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/* The rates are per EURO */
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static gnc_euro_rate_struct gnc_euro_rates[] =
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{
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{ "ATS", 13.7603 }, /* austrian schilling */
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{ "BEF", 40.3399 }, /* belgian franc */
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{ "BFR", 40.3399 }, /* belgian franc */
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{ "CYP", .585274 }, /* cyprus pound */
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{ "DEM", 1.95583 }, /* german mark */
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{ "DM", 1.95583 }, /* german mark */
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{ "EEK", 15.6466 }, /* Estonian Kroon */
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{ "ESC", 200.482 }, /* portuguese escudo */
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{ "ESP", 166.386 }, /* spanish peseta */
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{ "EUR", 1.00000 }, /* euro */
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{ "EURO", 1.00000 }, /* euro */
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{ "FF", 6.55957 }, /* french franc */
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{ "FIM", 5.94573 }, /* finnmark */
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{ "FMK", 5.94573 }, /* finnmark */
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{ "FRF", 6.55957 }, /* french franc */
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{ "GRD", 340.750 }, /* greek drachma */
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{ "HFL", 2.20371 }, /* netherland gulden */
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{ "IEP", .787564 }, /* irish pound */
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{ "IRP", .787564 }, /* irish pound */
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{ "ITL", 1936.27 }, /* italian lira */
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{ "LFR", 40.3399 }, /* luxembourg franc */
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{ "LIT", 1936.27 }, /* italian lira */
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{ "LUF", 40.3399 }, /* luxembourg franc */
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{ "LVL", .702804 }, /* latvian lats */
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{ "MTL", .429300 }, /* maltese lira */
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{ "NLG", 2.20371 }, /* netherland gulden */
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{ "PTA", 166.386 }, /* spanish peseta */
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{ "PTE", 200.482 }, /* portuguese escudo */
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{ "S", 13.7603 }, /* austrian schilling */
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{ "SCH", 13.7603 }, /* austrian schilling */
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{ "SIT", 239.640 }, /* slovenian tolar */
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{ "SKK", 30.1260 } /* slovak koruna */
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};
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static int
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gnc_euro_rate_compare (const void * key, const void * value)
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{
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const gnc_commodity * curr = key;
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const gnc_euro_rate_struct * euro = value;
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if (!key || !value)
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return -1;
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return g_ascii_strcasecmp(gnc_commodity_get_mnemonic(curr), euro->currency);
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}
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#if 0 /* Not Used */
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static int
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gnc_euro_rate_compare_code (const void * key, const void * value)
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{
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const char *code = key;
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const gnc_euro_rate_struct * euro = value;
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if (!key || !value)
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return -1;
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return g_ascii_strcasecmp (code, euro->currency);
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}
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#endif
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/* ------------------------------------------------------ */
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gboolean
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gnc_is_euro_currency(const gnc_commodity * currency)
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{
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gnc_euro_rate_struct *result;
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if (currency == NULL)
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return FALSE;
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if (!gnc_commodity_is_iso(currency))
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return FALSE;
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result = bsearch(currency,
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gnc_euro_rates,
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sizeof(gnc_euro_rates) / sizeof(gnc_euro_rate_struct),
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sizeof(gnc_euro_rate_struct),
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gnc_euro_rate_compare);
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if (result == NULL)
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return FALSE;
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return TRUE;
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}
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/* ------------------------------------------------------ */
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gnc_numeric
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gnc_convert_to_euro(const gnc_commodity * currency, gnc_numeric value)
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{
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gnc_euro_rate_struct *result;
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if (currency == NULL)
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return gnc_numeric_zero ();
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if (!gnc_commodity_is_iso(currency))
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return gnc_numeric_zero ();
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result = bsearch(currency,
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gnc_euro_rates,
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sizeof(gnc_euro_rates) / sizeof(gnc_euro_rate_struct),
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sizeof(gnc_euro_rate_struct),
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gnc_euro_rate_compare);
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if (result == NULL)
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return gnc_numeric_zero ();
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/* round to 2 decimal places */
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{
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gnc_numeric rate;
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rate = double_to_gnc_numeric (result->rate, 100000, GNC_HOW_RND_ROUND_HALF_UP);
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/* EC Regulation 1103/97 states we should use "Round half away from zero"
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* See http://europa.eu/legislation_summaries/economic_and_monetary_affairs/institutional_and_economic_framework/l25025_en.htm */
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return gnc_numeric_div (value, rate, 100, GNC_HOW_RND_ROUND_HALF_UP);
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}
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}
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/* ------------------------------------------------------ */
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gnc_numeric
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gnc_convert_from_euro(const gnc_commodity * currency, gnc_numeric value)
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{
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gnc_euro_rate_struct * result;
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if (currency == NULL)
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return gnc_numeric_zero ();
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if (!gnc_commodity_is_iso(currency))
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return gnc_numeric_zero ();
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result = bsearch(currency,
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gnc_euro_rates,
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sizeof(gnc_euro_rates) / sizeof(gnc_euro_rate_struct),
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sizeof(gnc_euro_rate_struct),
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gnc_euro_rate_compare);
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if (result == NULL)
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return gnc_numeric_zero ();
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{
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gnc_numeric rate;
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rate = double_to_gnc_numeric (result->rate, 100000, GNC_HOW_RND_ROUND_HALF_UP);
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/* EC Regulation 1103/97 states we should use "Round half away from zero"
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* See http://europa.eu/legislation_summaries/economic_and_monetary_affairs/institutional_and_economic_framework/l25025_en.htm */
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return gnc_numeric_mul (value, rate, gnc_commodity_get_fraction (currency),
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GNC_HOW_RND_ROUND_HALF_UP);
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}
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}
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/* ------------------------------------------------------ */
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gnc_numeric
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gnc_euro_currency_get_rate (const gnc_commodity *currency)
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{
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gnc_euro_rate_struct * result;
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if (currency == NULL)
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return gnc_numeric_zero ();
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if (!gnc_commodity_is_iso(currency))
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return gnc_numeric_zero ();
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result = bsearch(currency,
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gnc_euro_rates,
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sizeof(gnc_euro_rates) / sizeof(gnc_euro_rate_struct),
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sizeof(gnc_euro_rate_struct),
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gnc_euro_rate_compare);
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if (result == NULL)
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return gnc_numeric_zero ();
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return double_to_gnc_numeric (result->rate, GNC_DENOM_AUTO,
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GNC_HOW_RND_ROUND_HALF_UP);
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}
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/* ------------------------------------------------------ */
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gnc_commodity *
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gnc_get_euro (void)
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{
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gnc_commodity_table *table;
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table = gnc_commodity_table_get_table (gnc_get_current_book ());
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return gnc_commodity_table_lookup (table, GNC_COMMODITY_NS_CURRENCY, "EUR");
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}
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