icuSources/i18n/number_currencysymbols.cpp

   1 // © 2018 and later: Unicode, Inc. and others.
   2 // License & terms of use: http://www.unicode.org/copyright.html
   3
   4 #include "unicode/utypes.h"
   5
   6 #if !UCONFIG_NO_FORMATTING
   7
   8 // Allow implicit conversion from char16_t* to UnicodeString for this file:
   9 // Helpful in toString methods and elsewhere.
  10 #define UNISTR_FROM_STRING_EXPLICIT
  11
  12 #include "numparse_types.h"
  13 #include "number_currencysymbols.h"
  14
  15 using namespace icu;
  16 using namespace icu::number;
  17 using namespace icu::number::impl;
  18
  19
  20 CurrencySymbols::CurrencySymbols(CurrencyUnit currency, const Locale& locale, UErrorCode& status)
  21         : fCurrency(currency), fLocaleName(locale.getName(), status) {
  22     fCurrencySymbol.setToBogus();
  23     fIntlCurrencySymbol.setToBogus();
  24 }
  25
  26 CurrencySymbols::CurrencySymbols(CurrencyUnit currency, const Locale& locale,
  27                                  const DecimalFormatSymbols& symbols, UErrorCode& status)
  28         : CurrencySymbols(currency, locale, status) {
  29     // If either of the overrides is present, save it in the local UnicodeString.
  30     if (symbols.isCustomCurrencySymbol()) {
  31         fCurrencySymbol = symbols.getConstSymbol(DecimalFormatSymbols::kCurrencySymbol);
  32     }
  33     if (symbols.isCustomIntlCurrencySymbol()) {
  34         fIntlCurrencySymbol = symbols.getConstSymbol(DecimalFormatSymbols::kIntlCurrencySymbol);
  35     }
  36 }
  37
  38 const char16_t* CurrencySymbols::getIsoCode() const {
  39     return fCurrency.getISOCurrency();
  40 }
  41
  42 UnicodeString CurrencySymbols::getNarrowCurrencySymbol(UErrorCode& status) const {
  43     // Note: currently no override is available for narrow currency symbol
  44     return loadSymbol(UCURR_NARROW_SYMBOL_NAME, status);
  45 }
  46
  47 UnicodeString CurrencySymbols::getCurrencySymbol(UErrorCode& status) const {
  48     if (!fCurrencySymbol.isBogus()) {
  49         return fCurrencySymbol;
  50     }
  51     return loadSymbol(UCURR_SYMBOL_NAME, status);
  52 }
  53
  54 UnicodeString CurrencySymbols::loadSymbol(UCurrNameStyle selector, UErrorCode& status) const {
  55     const char16_t* isoCode = fCurrency.getISOCurrency();
  56     UBool ignoredIsChoiceFormatFillIn = FALSE;
  57     int32_t symbolLen = 0;
  58     const char16_t* symbol = ucurr_getName(
  59             isoCode,
  60             fLocaleName.data(),
  61             selector,
  62             &ignoredIsChoiceFormatFillIn,
  63             &symbolLen,
  64             &status);
  65     // If given an unknown currency, ucurr_getName returns the input string, which we can't alias safely!
  66     // Otherwise, symbol points to a resource bundle, and we can use readonly-aliasing constructor.
  67     if (symbol == isoCode) {
  68         return UnicodeString(isoCode, 3);
  69     } else {
  70         return UnicodeString(TRUE, symbol, symbolLen);
  71     }
  72 }
  73
  74 UnicodeString CurrencySymbols::getIntlCurrencySymbol(UErrorCode&) const {
  75     if (!fIntlCurrencySymbol.isBogus()) {
  76         return fIntlCurrencySymbol;
  77     }
  78     // Note: Not safe to use readonly-aliasing constructor here because the buffer belongs to this object,
  79     // which could be destructed or moved during the lifetime of the return value.
  80     return UnicodeString(fCurrency.getISOCurrency(), 3);
  81 }
  82
  83 UnicodeString CurrencySymbols::getPluralName(StandardPlural::Form plural, UErrorCode& status) const {
  84     const char16_t* isoCode = fCurrency.getISOCurrency();
  85     UBool isChoiceFormat = FALSE;
  86     int32_t symbolLen = 0;
  87     const char16_t* symbol = ucurr_getPluralName(
  88             isoCode,
  89             fLocaleName.data(),
  90             &isChoiceFormat,
  91             StandardPlural::getKeyword(plural),
  92             &symbolLen,
  93             &status);
  94     // If given an unknown currency, ucurr_getName returns the input string, which we can't alias safely!
  95     // Otherwise, symbol points to a resource bundle, and we can use readonly-aliasing constructor.
  96     if (symbol == isoCode) {
  97         return UnicodeString(isoCode, 3);
  98     } else {
  99         return UnicodeString(TRUE, symbol, symbolLen);
 100     }
 101 }
 102
 103
 104 CurrencyUnit
 105 icu::number::impl::resolveCurrency(const DecimalFormatProperties& properties, const Locale& locale,
 106                                    UErrorCode& status) {
 107     if (!properties.currency.isNull()) {
 108         return properties.currency.getNoError();
 109     } else {
 110         UErrorCode localStatus = U_ZERO_ERROR;
 111         char16_t buf[4] = {};
 112         ucurr_forLocale(locale.getName(), buf, 4, &localStatus);
 113         if (U_SUCCESS(localStatus)) {
 114             return CurrencyUnit(buf, status);
 115         } else {
 116             // Default currency (XXX)
 117             return CurrencyUnit();
 118         }
 119     }
 120 }
 121
 122
 123 #endif /* #if !UCONFIG_NO_FORMATTING */