1 files changed, 154 insertions, 0 deletions
diff --git a/intl/icu/source/i18n/number_decimfmtprops.cpp b/intl/icu/source/i18n/number_decimfmtprops.cpp
new file mode 100644
index 0000000000..6dbfc69ec8
--- /dev/null
+++ b/intl/icu/source/i18n/number_decimfmtprops.cpp
@@ -0,0 +1,154 @@
+// © 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 "number_decimfmtprops.h"
+#include "umutex.h"
+
+using namespace icu;
+using namespace icu::number;
+using namespace icu::number::impl;
+
+
+namespace {
+
+alignas(DecimalFormatProperties)
+char kRawDefaultProperties[sizeof(DecimalFormatProperties)];
+
+icu::UInitOnce gDefaultPropertiesInitOnce {};
+
+void U_CALLCONV initDefaultProperties(UErrorCode&) {
+    // can't fail, uses placement new into statically allocated space.
+    new(kRawDefaultProperties) DecimalFormatProperties(); // set to the default instance
+}
+
+}
+
+
+DecimalFormatProperties::DecimalFormatProperties() {
+    clear();
+}
+
+void DecimalFormatProperties::clear() {
+    compactStyle.nullify();
+    currency.nullify();
+    currencyPluralInfo.fPtr.adoptInstead(nullptr);
+    currencyUsage.nullify();
+    decimalPatternMatchRequired = false;
+    decimalSeparatorAlwaysShown = false;
+    exponentSignAlwaysShown = false;
+    currencyAsDecimal = false;
+    formatFailIfMoreThanMaxDigits = false;
+    formatWidth = -1;
+    groupingSize = -1;
+    groupingUsed = true;
+    magnitudeMultiplier = 0;
+    maximumFractionDigits = -1;
+    maximumIntegerDigits = -1;
+    maximumSignificantDigits = -1;
+    minimumExponentDigits = -1;
+    minimumFractionDigits = -1;
+    minimumGroupingDigits = -1;
+    minimumIntegerDigits = -1;
+    minimumSignificantDigits = -1;
+    multiplier = 1;
+    multiplierScale = 0;
+    negativePrefix.setToBogus();
+    negativePrefixPattern.setToBogus();
+    negativeSuffix.setToBogus();
+    negativeSuffixPattern.setToBogus();
+    padPosition.nullify();
+    padString.setToBogus();
+    parseCaseSensitive = false;
+    parseIntegerOnly = false;
+    parseMode.nullify();
+    parseNoExponent = false;
+    parseToBigDecimal = false;
+    parseAllInput = UNUM_MAYBE;
+    positivePrefix.setToBogus();
+    positivePrefixPattern.setToBogus();
+    positiveSuffix.setToBogus();
+    positiveSuffixPattern.setToBogus();
+    roundingIncrement = 0.0;
+    roundingMode.nullify();
+    secondaryGroupingSize = -1;
+    signAlwaysShown = false;
+}
+
+bool
+DecimalFormatProperties::_equals(const DecimalFormatProperties& other, bool ignoreForFastFormat) const {
+    bool eq = true;
+
+    // Properties that must be equal both normally and for fast-path formatting
+    eq = eq && compactStyle == other.compactStyle;
+    eq = eq && currency == other.currency;
+    eq = eq && currencyPluralInfo.fPtr.getAlias() == other.currencyPluralInfo.fPtr.getAlias();
+    eq = eq && currencyUsage == other.currencyUsage;
+    eq = eq && decimalSeparatorAlwaysShown == other.decimalSeparatorAlwaysShown;
+    eq = eq && exponentSignAlwaysShown == other.exponentSignAlwaysShown;
+    eq = eq && currencyAsDecimal == other.currencyAsDecimal;
+    eq = eq && formatFailIfMoreThanMaxDigits == other.formatFailIfMoreThanMaxDigits;
+    eq = eq && formatWidth == other.formatWidth;
+    eq = eq && magnitudeMultiplier == other.magnitudeMultiplier;
+    eq = eq && maximumSignificantDigits == other.maximumSignificantDigits;
+    eq = eq && minimumExponentDigits == other.minimumExponentDigits;
+    eq = eq && minimumGroupingDigits == other.minimumGroupingDigits;
+    eq = eq && minimumSignificantDigits == other.minimumSignificantDigits;
+    eq = eq && multiplier == other.multiplier;
+    eq = eq && multiplierScale == other.multiplierScale;
+    eq = eq && negativePrefix == other.negativePrefix;
+    eq = eq && negativeSuffix == other.negativeSuffix;
+    eq = eq && padPosition == other.padPosition;
+    eq = eq && padString == other.padString;
+    eq = eq && positivePrefix == other.positivePrefix;
+    eq = eq && positiveSuffix == other.positiveSuffix;
+    eq = eq && roundingIncrement == other.roundingIncrement;
+    eq = eq && roundingMode == other.roundingMode;
+    eq = eq && secondaryGroupingSize == other.secondaryGroupingSize;
+    eq = eq && signAlwaysShown == other.signAlwaysShown;
+
+    if (ignoreForFastFormat) {
+        return eq;
+    }
+
+    // Properties ignored by fast-path formatting
+    // Formatting (special handling required):
+    eq = eq && groupingSize == other.groupingSize;
+    eq = eq && groupingUsed == other.groupingUsed;
+    eq = eq && minimumFractionDigits == other.minimumFractionDigits;
+    eq = eq && maximumFractionDigits == other.maximumFractionDigits;
+    eq = eq && maximumIntegerDigits == other.maximumIntegerDigits;
+    eq = eq && minimumIntegerDigits == other.minimumIntegerDigits;
+    eq = eq && negativePrefixPattern == other.negativePrefixPattern;
+    eq = eq && negativeSuffixPattern == other.negativeSuffixPattern;
+    eq = eq && positivePrefixPattern == other.positivePrefixPattern;
+    eq = eq && positiveSuffixPattern == other.positiveSuffixPattern;
+
+    // Parsing (always safe to ignore):
+    eq = eq && decimalPatternMatchRequired == other.decimalPatternMatchRequired;
+    eq = eq && parseCaseSensitive == other.parseCaseSensitive;
+    eq = eq && parseIntegerOnly == other.parseIntegerOnly;
+    eq = eq && parseMode == other.parseMode;
+    eq = eq && parseNoExponent == other.parseNoExponent;
+    eq = eq && parseToBigDecimal == other.parseToBigDecimal;
+    eq = eq && parseAllInput == other.parseAllInput;
+
+    return eq;
+}
+
+bool DecimalFormatProperties::equalsDefaultExceptFastFormat() const {
+    UErrorCode localStatus = U_ZERO_ERROR;
+    umtx_initOnce(gDefaultPropertiesInitOnce, &initDefaultProperties, localStatus);
+    return _equals(*reinterpret_cast<DecimalFormatProperties*>(kRawDefaultProperties), true);
+}
+
+const DecimalFormatProperties& DecimalFormatProperties::getDefault() {
+    UErrorCode localStatus = U_ZERO_ERROR;
+    umtx_initOnce(gDefaultPropertiesInitOnce, &initDefaultProperties, localStatus);
+    return *reinterpret_cast<const DecimalFormatProperties*>(kRawDefaultProperties);
+}
+
+#endif /* #if !UCONFIG_NO_FORMATTING */