static jstring getCurrencyName(JNIEnv* env, jstring javaLanguageTag, jstring javaCurrencyCode, UCurrNameStyle nameStyle) {
ScopedUtfChars languageTag(env, javaLanguageTag);
if (languageTag.c_str() == NULL) {
return NULL;
}
ScopedJavaUnicodeString currencyCode(env, javaCurrencyCode);
if (!currencyCode.valid()) {
return NULL;
}
UnicodeString icuCurrencyCode(currencyCode.unicodeString());
UErrorCode status = U_ZERO_ERROR;
UBool isChoiceFormat = false;
int32_t charCount;
const UChar* chars = ucurr_getName(icuCurrencyCode.getTerminatedBuffer(), languageTag.c_str(),
nameStyle, &isChoiceFormat, &charCount, &status);
if (status == U_USING_DEFAULT_WARNING) {
if (nameStyle == UCURR_SYMBOL_NAME) {
// ICU doesn't distinguish between falling back to the root locale and meeting a genuinely
// unknown currency. The Currency class does.
if (!ucurr_isAvailable(icuCurrencyCode.getTerminatedBuffer(), U_DATE_MIN, U_DATE_MAX, &status)) {
return NULL;
}
}
if (nameStyle == UCURR_LONG_NAME) {
// ICU's default is English. We want the ISO 4217 currency code instead.
chars = icuCurrencyCode.getBuffer();
charCount = icuCurrencyCode.length();
}
}
return (charCount == 0) ? NULL : env->NewString(chars, charCount);
}
static jint ICU_getCurrencyNumericCode(JNIEnv* env, jclass, jstring javaCurrencyCode) {
ScopedJavaUnicodeString currencyCode(env, javaCurrencyCode);
if (!currencyCode.valid()) {
return 0;
}
UnicodeString icuCurrencyCode(currencyCode.unicodeString());
return ucurr_getNumericCode(icuCurrencyCode.getTerminatedBuffer());
}
static jint ICU_getCurrencyFractionDigits(JNIEnv* env, jclass, jstring javaCurrencyCode) {
ScopedJavaUnicodeString currencyCode(env, javaCurrencyCode);
if (!currencyCode.valid()) {
return 0;
}
UnicodeString icuCurrencyCode(currencyCode.unicodeString());
UErrorCode status = U_ZERO_ERROR;
return ucurr_getDefaultFractionDigits(icuCurrencyCode.getTerminatedBuffer(), &status);
}
static jstring ICU_getCurrencyDisplayName(JNIEnv* env, jclass, jstring javaLocaleName, jstring javaCurrencyCode) {
ScopedUtfChars localeName(env, javaLocaleName);
ScopedJavaUnicodeString currencyCode(env, javaCurrencyCode);
UnicodeString icuCurrencyCode(currencyCode.unicodeString());
UErrorCode status = U_ZERO_ERROR;
UBool isChoiceFormat;
int32_t charCount;
const UChar* chars = ucurr_getName(icuCurrencyCode.getTerminatedBuffer(), localeName.c_str(),
UCURR_LONG_NAME, &isChoiceFormat, &charCount, &status);
if (status == U_USING_DEFAULT_WARNING) {
// ICU's default is English. We want the ISO 4217 currency code instead.
chars = icuCurrencyCode.getBuffer();
charCount = icuCurrencyCode.length();
}
return (charCount == 0) ? NULL : env->NewString(chars, charCount);
}
