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Add getUnitCategory.

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This commit is contained in:
Hugo van der Merwe 2020-05-12 00:43:03 +02:00
parent 9bcc4b698f
commit 9b51361358
2 changed files with 26 additions and 0 deletions
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24
icu4c/source/i18n/unitsdata.cpp
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@ -108,6 +108,30 @@ class ConversionRateDataSink : public ResourceSink {
} // namespace
// TODO/FIXME: baseUnitIdentifier seems onerous? If this function could access
// extractCompoundBaseUnit directly, we could support any input unit identifier.
// Shall we move extractCompoundBaseUnit to unitsdata.cpp?
CharString U_I18N_API getUnitCategory(const char *baseUnitIdentifier, UErrorCode &status) {
CharString result;
LocalUResourceBundlePointer unitsBundle(ures_openDirect(NULL, "units", &status));
LocalUResourceBundlePointer unitQuantities(
ures_getByKey(unitsBundle.getAlias(), "unitQuantities", NULL, &status));
int32_t categoryLength;
if (U_FAILURE(status)) { return result; }
const UChar *uCategory =
ures_getStringByKey(unitQuantities.getAlias(), baseUnitIdentifier, &categoryLength, &status);
if (U_FAILURE(status)) {
// TODO: manually dealing with consumption-inverse
if (uprv_strcmp(baseUnitIdentifier, "meter-per-cubic-meter") == 0) {
status = U_ZERO_ERROR;
uCategory = ures_getStringByKey(unitQuantities.getAlias(), "cubic-meter-per-meter",
&categoryLength, &status);
}
}
result.appendInvariantChars(uCategory, categoryLength, status);
return result;
}
void U_I18N_API getAllConversionRates(MaybeStackVector<ConversionRateInfo> &result, UErrorCode &status) {
LocalUResourceBundlePointer unitsBundle(ures_openDirect(NULL, "units", &status));
ConversionRateDataSink sink(&result);

2
icu4c/source/i18n/unitsdata.h
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@ -14,6 +14,8 @@
U_NAMESPACE_BEGIN
CharString U_I18N_API getUnitCategory(const char *baseUnitIdentifier, UErrorCode &status);
/**
* Encapsulates "convertUnits" information from units resources, specifying how
* to convert from one unit to another.