Issue #1971 - Part 2: Update ICU source to 63.2.

intl/icu/source/i18n/number_grouping.cpp

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