1 files changed, 135 insertions, 0 deletions
diff --git a/intl/icu/source/i18n/number_currencysymbols.cpp b/intl/icu/source/i18n/number_currencysymbols.cpp
new file mode 100644
index 0000000000..8d5127556b
--- /dev/null
+++ b/intl/icu/source/i18n/number_currencysymbols.cpp
@@ -0,0 +1,135 @@
+// © 2018 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_FORMATTING
+
+// Allow implicit conversion from char16_t* to UnicodeString for this file:
+// Helpful in toString methods and elsewhere.
+#define UNISTR_FROM_STRING_EXPLICIT
+
+#include "numparse_types.h"
+#include "number_currencysymbols.h"
+
+using namespace icu;
+using namespace icu::number;
+using namespace icu::number::impl;
+
+
+CurrencySymbols::CurrencySymbols(CurrencyUnit currency, const Locale& locale, UErrorCode& status)
+        : fCurrency(currency), fLocaleName(locale.getName(), status) {
+    fCurrencySymbol.setToBogus();
+    fIntlCurrencySymbol.setToBogus();
+}
+
+CurrencySymbols::CurrencySymbols(CurrencyUnit currency, const Locale& locale,
+                                 const DecimalFormatSymbols& symbols, UErrorCode& status)
+        : CurrencySymbols(currency, locale, status) {
+    // If either of the overrides is present, save it in the local UnicodeString.
+    if (symbols.isCustomCurrencySymbol()) {
+        fCurrencySymbol = symbols.getConstSymbol(DecimalFormatSymbols::kCurrencySymbol);
+    }
+    if (symbols.isCustomIntlCurrencySymbol()) {
+        fIntlCurrencySymbol = symbols.getConstSymbol(DecimalFormatSymbols::kIntlCurrencySymbol);
+    }
+}
+
+const char16_t* CurrencySymbols::getIsoCode() const {
+    return fCurrency.getISOCurrency();
+}
+
+UnicodeString CurrencySymbols::getNarrowCurrencySymbol(UErrorCode& status) const {
+    // Note: currently no override is available for narrow currency symbol
+    return loadSymbol(UCURR_NARROW_SYMBOL_NAME, status);
+}
+
+UnicodeString CurrencySymbols::getFormalCurrencySymbol(UErrorCode& status) const {
+    // Note: currently no override is available for formal currency symbol
+    return loadSymbol(UCURR_FORMAL_SYMBOL_NAME, status);
+}
+
+UnicodeString CurrencySymbols::getVariantCurrencySymbol(UErrorCode& status) const {
+    // Note: currently no override is available for variant currency symbol
+    return loadSymbol(UCURR_VARIANT_SYMBOL_NAME, status);
+}
+
+UnicodeString CurrencySymbols::getCurrencySymbol(UErrorCode& status) const {
+    if (!fCurrencySymbol.isBogus()) {
+        return fCurrencySymbol;
+    }
+    return loadSymbol(UCURR_SYMBOL_NAME, status);
+}
+
+UnicodeString CurrencySymbols::loadSymbol(UCurrNameStyle selector, UErrorCode& status) const {
+    const char16_t* isoCode = fCurrency.getISOCurrency();
+    int32_t symbolLen = 0;
+    const char16_t* symbol = ucurr_getName(
+            isoCode,
+            fLocaleName.data(),
+            selector,
+            nullptr /* isChoiceFormat */,
+            &symbolLen,
+            &status);
+    // If given an unknown currency, ucurr_getName returns the input string, which we can't alias safely!
+    // Otherwise, symbol points to a resource bundle, and we can use readonly-aliasing constructor.
+    if (symbol == isoCode) {
+        return UnicodeString(isoCode, 3);
+    } else {
+        return UnicodeString(true, symbol, symbolLen);
+    }
+}
+
+UnicodeString CurrencySymbols::getIntlCurrencySymbol(UErrorCode&) const {
+    if (!fIntlCurrencySymbol.isBogus()) {
+        return fIntlCurrencySymbol;
+    }
+    // Note: Not safe to use readonly-aliasing constructor here because the buffer belongs to this object,
+    // which could be destructed or moved during the lifetime of the return value.
+    return UnicodeString(fCurrency.getISOCurrency(), 3);
+}
+
+UnicodeString CurrencySymbols::getPluralName(StandardPlural::Form plural, UErrorCode& status) const {
+    const char16_t* isoCode = fCurrency.getISOCurrency();
+    int32_t symbolLen = 0;
+    const char16_t* symbol = ucurr_getPluralName(
+            isoCode,
+            fLocaleName.data(),
+            nullptr /* isChoiceFormat */,
+            StandardPlural::getKeyword(plural),
+            &symbolLen,
+            &status);
+    // If given an unknown currency, ucurr_getName returns the input string, which we can't alias safely!
+    // Otherwise, symbol points to a resource bundle, and we can use readonly-aliasing constructor.
+    if (symbol == isoCode) {
+        return UnicodeString(isoCode, 3);
+    } else {
+        return UnicodeString(true, symbol, symbolLen);
+    }
+}
+
+bool CurrencySymbols::hasEmptyCurrencySymbol() const {
+    return !fCurrencySymbol.isBogus() && fCurrencySymbol.isEmpty();
+}
+
+
+CurrencyUnit
+icu::number::impl::resolveCurrency(const DecimalFormatProperties& properties, const Locale& locale,
+                                   UErrorCode& status) {
+    if (!properties.currency.isNull()) {
+        return properties.currency.getNoError();
+    } else {
+        UErrorCode localStatus = U_ZERO_ERROR;
+        char16_t buf[4] = {};
+        ucurr_forLocale(locale.getName(), buf, 4, &localStatus);
+        if (U_SUCCESS(localStatus)) {
+            return CurrencyUnit(buf, status);
+        } else {
+            // Default currency (XXX)
+            return CurrencyUnit();
+        }
+    }
+}
+
+
+#endif /* #if !UCONFIG_NO_FORMATTING */