110 lines
3.5 KiB
C++
110 lines
3.5 KiB
C++
// © 2017 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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#include "unicode/utypes.h"
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#if !UCONFIG_NO_FORMATTING
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#include "unicode/numberformatter.h"
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#include "number_patternstring.h"
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#include "uresimp.h"
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using namespace icu;
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using namespace icu::number;
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using namespace icu::number::impl;
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namespace {
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int16_t getMinGroupingForLocale(const Locale& locale) {
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// TODO: Cache this?
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UErrorCode localStatus = U_ZERO_ERROR;
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LocalUResourceBundlePointer bundle(ures_open(NULL, locale.getName(), &localStatus));
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int32_t resultLen = 0;
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const char16_t* result = ures_getStringByKeyWithFallback(
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bundle.getAlias(),
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"NumberElements/minimumGroupingDigits",
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&resultLen,
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&localStatus);
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// TODO: Is it safe to assume resultLen == 1? Would locales set minGrouping >= 10?
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if (U_FAILURE(localStatus) || resultLen != 1) {
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return 1;
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}
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return result[0] - u'0';
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}
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}
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Grouper Grouper::forStrategy(UNumberGroupingStrategy grouping) {
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switch (grouping) {
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case UNUM_GROUPING_OFF:
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return {-1, -1, -2, grouping};
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case UNUM_GROUPING_AUTO:
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return {-2, -2, -2, grouping};
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case UNUM_GROUPING_MIN2:
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return {-2, -2, -3, grouping};
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case UNUM_GROUPING_ON_ALIGNED:
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return {-4, -4, 1, grouping};
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case UNUM_GROUPING_THOUSANDS:
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return {3, 3, 1, grouping};
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default:
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UPRV_UNREACHABLE_EXIT;
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}
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}
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Grouper Grouper::forProperties(const DecimalFormatProperties& properties) {
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if (!properties.groupingUsed) {
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return forStrategy(UNUM_GROUPING_OFF);
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}
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auto grouping1 = static_cast<int16_t>(properties.groupingSize);
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auto grouping2 = static_cast<int16_t>(properties.secondaryGroupingSize);
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auto minGrouping = static_cast<int16_t>(properties.minimumGroupingDigits);
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grouping1 = grouping1 > 0 ? grouping1 : grouping2 > 0 ? grouping2 : grouping1;
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grouping2 = grouping2 > 0 ? grouping2 : grouping1;
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return {grouping1, grouping2, minGrouping, UNUM_GROUPING_COUNT};
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}
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void Grouper::setLocaleData(const impl::ParsedPatternInfo &patternInfo, const Locale& locale) {
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if (fMinGrouping == -2) {
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fMinGrouping = getMinGroupingForLocale(locale);
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} else if (fMinGrouping == -3) {
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fMinGrouping = static_cast<int16_t>(uprv_max(2, getMinGroupingForLocale(locale)));
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} else {
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// leave fMinGrouping alone
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}
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if (fGrouping1 != -2 && fGrouping2 != -4) {
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return;
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}
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auto grouping1 = static_cast<int16_t> (patternInfo.positive.groupingSizes & 0xffff);
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auto grouping2 = static_cast<int16_t> ((patternInfo.positive.groupingSizes >> 16) & 0xffff);
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auto grouping3 = static_cast<int16_t> ((patternInfo.positive.groupingSizes >> 32) & 0xffff);
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if (grouping2 == -1) {
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grouping1 = fGrouping1 == -4 ? (short) 3 : (short) -1;
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}
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if (grouping3 == -1) {
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grouping2 = grouping1;
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}
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fGrouping1 = grouping1;
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fGrouping2 = grouping2;
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}
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bool Grouper::groupAtPosition(int32_t position, const impl::DecimalQuantity &value) const {
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U_ASSERT(fGrouping1 > -2);
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if (fGrouping1 == -1 || fGrouping1 == 0) {
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// Either -1 or 0 means "no grouping"
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return false;
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}
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position -= fGrouping1;
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return position >= 0 && (position % fGrouping2) == 0
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&& value.getUpperDisplayMagnitude() - fGrouping1 + 1 >= fMinGrouping;
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}
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int16_t Grouper::getPrimary() const {
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return fGrouping1;
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}
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int16_t Grouper::getSecondary() const {
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return fGrouping2;
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}
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#endif /* #if !UCONFIG_NO_FORMATTING */
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