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     int32_t symbolLen = 0;
  57     const char16_t* symbol = ucurr_getName(
  58             isoCode,
  59             fLocaleName.data(),
  60             selector,
  61             nullptr /* isChoiceFormat */,
  62             &symbolLen,
  63             &status);
  64     // If given an unknown currency, ucurr_getName returns the input string, which we can't alias safely!
  65     // Otherwise, symbol points to a resource bundle, and we can use readonly-aliasing constructor.
  66     if (symbol == isoCode) {
  67         return UnicodeString(isoCode, 3);
  68     } else {
  69         return UnicodeString(TRUE, symbol, symbolLen);
  70     }
  71 }
  72
  73 UnicodeString CurrencySymbols::getIntlCurrencySymbol(UErrorCode&) const {
  74     if (!fIntlCurrencySymbol.isBogus()) {
  75         return fIntlCurrencySymbol;
  76     }
  77     // Note: Not safe to use readonly-aliasing constructor here because the buffer belongs to this object,
  78     // which could be destructed or moved during the lifetime of the return value.
  79     return UnicodeString(fCurrency.getISOCurrency(), 3);
  80 }
  81
  82 UnicodeString CurrencySymbols::getPluralName(StandardPlural::Form plural, UErrorCode& status) const {
  83     const char16_t* isoCode = fCurrency.getISOCurrency();
  84     int32_t symbolLen = 0;
  85     const char16_t* symbol = ucurr_getPluralName(
  86             isoCode,
  87             fLocaleName.data(),
  88             nullptr /* isChoiceFormat */,
  89             StandardPlural::getKeyword(plural),
  90             &symbolLen,
  91             &status);
  92     // If given an unknown currency, ucurr_getName returns the input string, which we can't alias safely!
  93     // Otherwise, symbol points to a resource bundle, and we can use readonly-aliasing constructor.
  94     if (symbol == isoCode) {
  95         return UnicodeString(isoCode, 3);
  96     } else {
  97         return UnicodeString(TRUE, symbol, symbolLen);
  98     }
  99 }
 100
 101
 102 CurrencyUnit
 103 icu::number::impl::resolveCurrency(const DecimalFormatProperties& properties, const Locale& locale,
 104                                    UErrorCode& status) {
 105     if (!properties.currency.isNull()) {
 106         return properties.currency.getNoError();
 107     } else {
 108         UErrorCode localStatus = U_ZERO_ERROR;
 109         char16_t buf[4] = {};
 110         ucurr_forLocale(locale.getName(), buf, 4, &localStatus);
 111         if (U_SUCCESS(localStatus)) {
 112             return CurrencyUnit(buf, status);
 113         } else {
 114             // Default currency (XXX)
 115             return CurrencyUnit();
 116         }
 117     }
 118 }
 119
 120
 121 #endif /* #if !UCONFIG_NO_FORMATTING */