/********************************************************************\ * gnc-euro.c -- utilities for EURO currency * * * * Copyright (C) 2000 Herbert Thoma * * * * This program 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; either version 2 of * * the License, or (at your option) any later version. * * * * This program 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 this program; if not, write to the Free Software * * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * * \********************************************************************/ #include #include "gnc-euro.h" #include #include #include #include #include "gnc-session.h" /* local structs */ typedef struct { const char *currency; double rate; } gnc_euro_rate_struct; /* This array MUST be sorted ! */ /* The rates are per EURO and are converted to GncNumeric */ static gnc_euro_rate_struct gnc_euro_rates[] = { { "ATS", 13.7603 }, /* austrian schilling */ { "BEF", 40.3399 }, /* belgian franc */ { "CYP", .585274 }, /* cyprus pound */ { "DEM", 1.95583 }, /* german mark */ { "EEK", 15.6466 }, /* Estonian Kroon */ { "ESP", 166.386 }, /* spanish peseta */ { "EUR", 1.00000 }, /* euro */ { "FIM", 5.94573 }, /* finnmark */ { "FRF", 6.55957 }, /* french franc */ { "GRD", 340.750 }, /* greek drachma */ { "HRK", 7.53450 }, /* Croatian kuna */ { "IEP", .787564 }, /* irish pound */ { "ITL", 1936.27 }, /* italian lira */ { "LUF", 40.3399 }, /* luxembourg franc */ { "LVL", .702804 }, /* latvian lats */ { "MTL", .429300 }, /* maltese lira */ { "NLG", 2.20371 }, /* netherland gulden */ { "PTE", 200.482 }, /* portuguese escudo */ { "SIT", 239.640 }, /* slovenian tolar */ { "SKK", 30.1260 } /* slovak koruna */ }; static int gnc_euro_rate_compare (const void * key, const void * value) { const gnc_commodity * curr = key; const gnc_euro_rate_struct * euro = value; if (!key || !value) return -1; return g_ascii_strcasecmp(gnc_commodity_get_mnemonic(curr), euro->currency); } #if 0 /* Not Used */ static int gnc_euro_rate_compare_code (const void * key, const void * value) { const char *code = key; const gnc_euro_rate_struct * euro = value; if (!key || !value) return -1; return g_ascii_strcasecmp (code, euro->currency); } #endif /* ------------------------------------------------------ */ gboolean gnc_is_euro_currency(const gnc_commodity * currency) { gnc_euro_rate_struct *result; if (currency == NULL) return FALSE; if (!gnc_commodity_is_iso(currency)) return FALSE; result = bsearch(currency, gnc_euro_rates, sizeof(gnc_euro_rates) / sizeof(gnc_euro_rate_struct), sizeof(gnc_euro_rate_struct), gnc_euro_rate_compare); if (result == NULL) return FALSE; return TRUE; } /* ------------------------------------------------------ */ gnc_numeric gnc_convert_to_euro(const gnc_commodity * currency, gnc_numeric value) { gnc_euro_rate_struct *result; if (currency == NULL) return gnc_numeric_zero (); if (!gnc_commodity_is_iso(currency)) return gnc_numeric_zero (); result = bsearch(currency, gnc_euro_rates, sizeof(gnc_euro_rates) / sizeof(gnc_euro_rate_struct), sizeof(gnc_euro_rate_struct), gnc_euro_rate_compare); if (result == NULL) return gnc_numeric_zero (); /* round to 2 decimal places */ { gnc_numeric rate; rate = double_to_gnc_numeric (result->rate, 100000, GNC_HOW_RND_ROUND_HALF_UP); /* EC Regulation 1103/97 states we should use "Round half away from zero" * See https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A31997R1103&qid=1662917247821 */ return gnc_numeric_div (value, rate, 100, GNC_HOW_RND_ROUND_HALF_UP); } } /* ------------------------------------------------------ */ gnc_numeric gnc_convert_from_euro(const gnc_commodity * currency, gnc_numeric value) { gnc_euro_rate_struct * result; if (currency == NULL) return gnc_numeric_zero (); if (!gnc_commodity_is_iso(currency)) return gnc_numeric_zero (); result = bsearch(currency, gnc_euro_rates, sizeof(gnc_euro_rates) / sizeof(gnc_euro_rate_struct), sizeof(gnc_euro_rate_struct), gnc_euro_rate_compare); if (result == NULL) return gnc_numeric_zero (); { gnc_numeric rate; rate = double_to_gnc_numeric (result->rate, 100000, GNC_HOW_RND_ROUND_HALF_UP); /* EC Regulation 1103/97 states we should use "Round half away from zero" * See http://europa.eu/legislation_summaries/economic_and_monetary_affairs/institutional_and_economic_framework/l25025_en.htm */ return gnc_numeric_mul (value, rate, gnc_commodity_get_fraction (currency), GNC_HOW_RND_ROUND_HALF_UP); } } /* ------------------------------------------------------ */ gnc_numeric gnc_euro_currency_get_rate (const gnc_commodity *currency) { gnc_euro_rate_struct * result; if (currency == NULL) return gnc_numeric_zero (); if (!gnc_commodity_is_iso(currency)) return gnc_numeric_zero (); result = bsearch(currency, gnc_euro_rates, sizeof(gnc_euro_rates) / sizeof(gnc_euro_rate_struct), sizeof(gnc_euro_rate_struct), gnc_euro_rate_compare); if (result == NULL) return gnc_numeric_zero (); return double_to_gnc_numeric (result->rate, GNC_DENOM_AUTO, GNC_HOW_RND_ROUND_HALF_UP); } /* ------------------------------------------------------ */ gnc_commodity * gnc_get_euro (void) { QofBook* book = qof_session_get_book (gnc_get_current_session ()); gnc_commodity_table *table = gnc_commodity_table_get_table (book); return gnc_commodity_table_lookup (table, GNC_COMMODITY_NS_CURRENCY, "EUR"); }