ICU-1097 rename currency.* to ucurr.*
X-SVN-Rev: 9048
This commit is contained in:
Alan Liu
parent
61c7a84b5e
commit
62039179f9
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/*
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**********************************************************************
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* Copyright (c) 2002, International Business Machines
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* Corporation and others. All Rights Reserved.
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**********************************************************************
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*/
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#include "unicode/currency.h"
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#include "cstring.h"
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#include "unicode/locid.h"
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#include "unicode/resbund.h"
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//------------------------------------------------------------
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// Constants
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// Default currency meta data of last resort. We try to use the
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// defaults encoded in the meta data resource bundle. If there is a
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// configuration/build error and these are not available, we use these
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// hard-coded defaults (which should be identical).
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static const int32_t LAST_RESORT_DATA[] = { 2, 0 };
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// POW10[i] = 10^i, i=0..MAX_POW10
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static const int32_t POW10[] = { 1, 10, 100, 1000, 10000, 100000,
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1000000, 10000000, 100000000, 1000000000 };
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static const int32_t MAX_POW10 = (sizeof(POW10)/sizeof(POW10[0])) - 1;
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//------------------------------------------------------------
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// Resource tags
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// Tag for meta-data, in root.
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static const char CURRENCY_META[] = "CurrencyMeta";
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// Tag for default meta-data, in CURRENCY_META
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static const char DEFAULT_META[] = "DEFAULT";
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// Tag for legacy currency elements data
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static const char CURRENCY_ELEMENTS[] = "CurrencyElements";
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// Tag for localized display names (symbols) of currencies
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static const char CURRENCIES[] = "Currencies";
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//------------------------------------------------------------
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// Code
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/**
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* Internal function to look up currency data. Result is an array of
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* two integers. The first is the fraction digits. The second is the
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* rounding increment, or 0 if none. The rounding increment is in
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* units of 10^(-fraction_digits).
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*/
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static const int32_t*
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_findData(const char* currency) {
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// Get CurrencyMeta resource out of root locale file. [This may
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// move out of the root locale file later; if it does, update this
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// code.]
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UErrorCode ec = U_ZERO_ERROR;
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ResourceBundle currencyMeta =
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ResourceBundle((char*)0, Locale(""), ec).get(CURRENCY_META, ec);
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if (U_FAILURE(ec)) {
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// Config/build error; return hard-coded defaults
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return LAST_RESORT_DATA;
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}
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// Look up our currency, or if that's not available, then DEFAULT
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ResourceBundle rb = currencyMeta.get(currency, ec);
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if (U_FAILURE(ec)) {
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rb = currencyMeta.get(DEFAULT_META, ec);
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if (U_FAILURE(ec)) {
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// Config/build error; return hard-coded defaults
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return LAST_RESORT_DATA;
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}
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}
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int32_t len;
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const int32_t *data = rb.getIntVector(len, ec);
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if (U_FAILURE(ec) || len < 2) {
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// Config/build error; return hard-coded defaults
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return LAST_RESORT_DATA;
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}
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return data;
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}
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U_CAPI void U_EXPORT2
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ucurr_forLocale(const char* locale,
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char* result,
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UErrorCode* ec) {
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// TODO: ? Establish separate resource for locale->currency mapping
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// ? <IF> we end up deleting the CurrencyElements resource.
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// ? In the meantime the CurrencyElements tag has exactly the
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// ? data we want.
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// Look up the CurrencyElements resource for this locale.
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// It contains: [0] = currency symbol, e.g. "$";
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// [1] = intl. currency symbol, e.g. "USD";
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// [2] = monetary decimal separator, e.g. ".".
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if (ec != NULL && U_SUCCESS(*ec)) {
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ResourceBundle rb((char*)0, Locale(locale), *ec);
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UnicodeString s = rb.get(CURRENCY_ELEMENTS, *ec).getStringEx(1, *ec);
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if (U_SUCCESS(*ec)) {
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s.extract(0, 3, result, "");
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return;
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}
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}
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result[0] = 0;
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}
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U_NAMESPACE_BEGIN
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/**
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* Rather than convert a UnicodeString to a UChar array and then back
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* to a UnicodeString, possibly with allocation of UChar space on the
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* heap, we use this function in DecimalFormat.
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*
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* This is internal to ICU, but exported by this file. Note that it
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* is C++ API even though it's named like a C function.
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*
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* @internal
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*/
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UnicodeString
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ucurr_getSymbolAsUnicodeString(const char* currency,
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const Locale& locale) {
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// Look up the Currencies resource for the given locale. The
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// Currencies locale data looks like this:
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//|en {
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//| Currencies {
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//| USD { "$" }
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//| CHF { "sFr" }
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//| //...
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//| }
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//|}
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UErrorCode ec = U_ZERO_ERROR;
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ResourceBundle rb((char*)0, locale, ec);
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UnicodeString s = rb.get(CURRENCIES, ec).getStringEx(currency, ec);
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UBool found = U_SUCCESS(ec);
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if (!found) {
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// Since the Currencies resource is not fully populated yet,
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// check to see if we can find the currency in the
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// CurrencyElements resource.
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ec = U_ZERO_ERROR;
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ResourceBundle ce = rb.get(CURRENCY_ELEMENTS, ec);
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UnicodeString curr(currency, "");
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if (ce.getStringEx(1, ec) == curr) {
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s = ce.getStringEx((int32_t)0, ec);
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found = U_SUCCESS(ec);
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}
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if (!found) {
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// If we fail to find a match, use the full ISO code
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s = curr;
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}
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}
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return s;
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}
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U_NAMESPACE_END
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U_CAPI int32_t U_EXPORT2
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ucurr_getSymbol(const char* currency,
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UChar* result,
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int32_t resultCapacity,
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const char* locale,
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UErrorCode* ec) {
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if (ec == NULL || U_FAILURE(*ec)) {
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return 0;
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}
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UnicodeString s = ucurr_getSymbolAsUnicodeString(currency, Locale(locale));
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return s.extract(result, resultCapacity, *ec);
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}
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U_CAPI int32_t U_EXPORT2
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ucurr_getDefaultFractionDigits(const char* currency) {
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return (_findData(currency))[0];
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}
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U_CAPI double U_EXPORT2
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ucurr_getRoundingIncrement(const char* currency) {
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const int32_t *data = _findData(currency);
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// If there is no rounding, or if the meta data is invalid,
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// return 0.0 to indicate no rounding.
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if (data[1] == 0 || data[0] < 0 || data[0] > MAX_POW10) {
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return 0.0;
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}
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// Return data[1] / 10^(data[0]). The only actual rounding data,
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// as of this writing, is CHF { 2, 25 }.
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return double(data[1]) / POW10[data[0]];
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}
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//eof
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@ -1,105 +0,0 @@
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/*
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**********************************************************************
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* Copyright (c) 2002, International Business Machines
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* Corporation and others. All Rights Reserved.
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**********************************************************************
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* $Source: /xsrl/Nsvn/icu/icu/source/i18n/unicode/Attic/currency.h,v $
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* $Revision: 1.4 $
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**********************************************************************
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*/
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#ifndef UCURRENCY_H
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#define UCURRENCY_H
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#include "unicode/utypes.h"
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/**
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* The ucurr API encapsulates information about a currency, as defined by
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* ISO 4217. A currency is represented by a 3-character string
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* containing its ISO 4217 code. This API can return various data
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* necessary the proper display of a currency:
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*
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* <ul><li>A display symbol, for a specific locale
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* <li>The number of fraction digits to display
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* <li>A rounding increment
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* </ul>
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*
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* The <tt>DecimalFormat</tt> class uses these data to display
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* currencies.
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* @author Alan Liu
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* @since ICU 2.2
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*/
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/**
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* Returns a currency code for the default currency in the given
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* locale.
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* @param locale the locale for which to retrieve a currency code
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* @param result pointer to a buffer of at least 4 chars
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* to receive a null-terminated 3-letter ISO 4217 code
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* @param ec error code
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*/
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U_CAPI void U_EXPORT2
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ucurr_forLocale(const char* locale,
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char* result,
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UErrorCode* ec);
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/**
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* Returns the display string for the given currency in the
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* given locale. For example, the display string for the USD
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* currency object in the en_US locale is "$".
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* @param currency null-terminated 3-letter ISO 4217 code
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* @param result pointer to result buffer, or NULL
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* @param resultCapacity size of result buffer
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* @param locale locale in which to display currency
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* @param ec error code
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* @return size of result, possibly larger than resultCapacity
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*/
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U_CAPI int32_t U_EXPORT2
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ucurr_getSymbol(const char* currency,
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UChar* result,
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int32_t resultCapacity,
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const char* locale,
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UErrorCode* ec);
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/**
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* Returns the number of the number of fraction digits that should
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* be displayed for the given currency.
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* @return a non-negative number of fraction digits to be
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* displayed
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*/
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U_CAPI int32_t U_EXPORT2
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ucurr_getDefaultFractionDigits(const char* currency);
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/**
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* Returns the rounding increment for the given currency, or 0.0 if no
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* rounding is done by the currency.
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* @return the non-negative rounding increment, or 0.0 if none
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*/
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U_CAPI double U_EXPORT2
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ucurr_getRoundingIncrement(const char* currency);
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/*------------------------------------------------------------------*/
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/* Internal API. Do not use. Will change without notice. */
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#ifdef XP_CPLUSPLUS
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#include "unicode/unistr.h"
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U_NAMESPACE_BEGIN
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class Locale;
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/**
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* Do not use; for ICU internal use only. This is a C++ function
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* even though it's named like a C function.
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*
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* @internal
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*/
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UnicodeString ucurr_getSymbolAsUnicodeString(const char* currency,
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const Locale& locale);
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U_NAMESPACE_END
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#endif
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#endif
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