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-rw-r--r--intl/icu/source/i18n/number_patternstring.cpp1120
1 files changed, 1120 insertions, 0 deletions
diff --git a/intl/icu/source/i18n/number_patternstring.cpp b/intl/icu/source/i18n/number_patternstring.cpp
new file mode 100644
index 0000000000..9d84505606
--- /dev/null
+++ b/intl/icu/source/i18n/number_patternstring.cpp
@@ -0,0 +1,1120 @@
+// © 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
+
+// Allow implicit conversion from char16_t* to UnicodeString for this file:
+// Helpful in toString methods and elsewhere.
+#define UNISTR_FROM_STRING_EXPLICIT
+#define UNISTR_FROM_CHAR_EXPLICIT
+
+#include "uassert.h"
+#include "number_patternstring.h"
+#include "unicode/utf16.h"
+#include "number_utils.h"
+#include "number_roundingutils.h"
+#include "number_mapper.h"
+
+using namespace icu;
+using namespace icu::number;
+using namespace icu::number::impl;
+
+
+void PatternParser::parseToPatternInfo(const UnicodeString& patternString, ParsedPatternInfo& patternInfo,
+ UErrorCode& status) {
+ patternInfo.consumePattern(patternString, status);
+}
+
+DecimalFormatProperties
+PatternParser::parseToProperties(const UnicodeString& pattern, IgnoreRounding ignoreRounding,
+ UErrorCode& status) {
+ DecimalFormatProperties properties;
+ parseToExistingPropertiesImpl(pattern, properties, ignoreRounding, status);
+ return properties;
+}
+
+DecimalFormatProperties PatternParser::parseToProperties(const UnicodeString& pattern,
+ UErrorCode& status) {
+ return parseToProperties(pattern, IGNORE_ROUNDING_NEVER, status);
+}
+
+void
+PatternParser::parseToExistingProperties(const UnicodeString& pattern, DecimalFormatProperties& properties,
+ IgnoreRounding ignoreRounding, UErrorCode& status) {
+ parseToExistingPropertiesImpl(pattern, properties, ignoreRounding, status);
+}
+
+
+char16_t ParsedPatternInfo::charAt(int32_t flags, int32_t index) const {
+ const Endpoints& endpoints = getEndpoints(flags);
+ if (index < 0 || index >= endpoints.end - endpoints.start) {
+ UPRV_UNREACHABLE;
+ }
+ return pattern.charAt(endpoints.start + index);
+}
+
+int32_t ParsedPatternInfo::length(int32_t flags) const {
+ return getLengthFromEndpoints(getEndpoints(flags));
+}
+
+int32_t ParsedPatternInfo::getLengthFromEndpoints(const Endpoints& endpoints) {
+ return endpoints.end - endpoints.start;
+}
+
+UnicodeString ParsedPatternInfo::getString(int32_t flags) const {
+ const Endpoints& endpoints = getEndpoints(flags);
+ if (endpoints.start == endpoints.end) {
+ return UnicodeString();
+ }
+ // Create a new UnicodeString
+ return UnicodeString(pattern, endpoints.start, endpoints.end - endpoints.start);
+}
+
+const Endpoints& ParsedPatternInfo::getEndpoints(int32_t flags) const {
+ bool prefix = (flags & AFFIX_PREFIX) != 0;
+ bool isNegative = (flags & AFFIX_NEGATIVE_SUBPATTERN) != 0;
+ bool padding = (flags & AFFIX_PADDING) != 0;
+ if (isNegative && padding) {
+ return negative.paddingEndpoints;
+ } else if (padding) {
+ return positive.paddingEndpoints;
+ } else if (prefix && isNegative) {
+ return negative.prefixEndpoints;
+ } else if (prefix) {
+ return positive.prefixEndpoints;
+ } else if (isNegative) {
+ return negative.suffixEndpoints;
+ } else {
+ return positive.suffixEndpoints;
+ }
+}
+
+bool ParsedPatternInfo::positiveHasPlusSign() const {
+ return positive.hasPlusSign;
+}
+
+bool ParsedPatternInfo::hasNegativeSubpattern() const {
+ return fHasNegativeSubpattern;
+}
+
+bool ParsedPatternInfo::negativeHasMinusSign() const {
+ return negative.hasMinusSign;
+}
+
+bool ParsedPatternInfo::hasCurrencySign() const {
+ return positive.hasCurrencySign || (fHasNegativeSubpattern && negative.hasCurrencySign);
+}
+
+bool ParsedPatternInfo::containsSymbolType(AffixPatternType type, UErrorCode& status) const {
+ return AffixUtils::containsType(pattern, type, status);
+}
+
+bool ParsedPatternInfo::hasBody() const {
+ return positive.integerTotal > 0;
+}
+
+/////////////////////////////////////////////////////
+/// BEGIN RECURSIVE DESCENT PARSER IMPLEMENTATION ///
+/////////////////////////////////////////////////////
+
+UChar32 ParsedPatternInfo::ParserState::peek() {
+ if (offset == pattern.length()) {
+ return -1;
+ } else {
+ return pattern.char32At(offset);
+ }
+}
+
+UChar32 ParsedPatternInfo::ParserState::next() {
+ int codePoint = peek();
+ offset += U16_LENGTH(codePoint);
+ return codePoint;
+}
+
+void ParsedPatternInfo::consumePattern(const UnicodeString& patternString, UErrorCode& status) {
+ if (U_FAILURE(status)) { return; }
+ this->pattern = patternString;
+
+ // This class is not intended for writing twice!
+ // Use move assignment to overwrite instead.
+ U_ASSERT(state.offset == 0);
+
+ // pattern := subpattern (';' subpattern)?
+ currentSubpattern = &positive;
+ consumeSubpattern(status);
+ if (U_FAILURE(status)) { return; }
+ if (state.peek() == u';') {
+ state.next(); // consume the ';'
+ // Don't consume the negative subpattern if it is empty (trailing ';')
+ if (state.peek() != -1) {
+ fHasNegativeSubpattern = true;
+ currentSubpattern = &negative;
+ consumeSubpattern(status);
+ if (U_FAILURE(status)) { return; }
+ }
+ }
+ if (state.peek() != -1) {
+ state.toParseException(u"Found unquoted special character");
+ status = U_UNQUOTED_SPECIAL;
+ }
+}
+
+void ParsedPatternInfo::consumeSubpattern(UErrorCode& status) {
+ // subpattern := literals? number exponent? literals?
+ consumePadding(PadPosition::UNUM_PAD_BEFORE_PREFIX, status);
+ if (U_FAILURE(status)) { return; }
+ consumeAffix(currentSubpattern->prefixEndpoints, status);
+ if (U_FAILURE(status)) { return; }
+ consumePadding(PadPosition::UNUM_PAD_AFTER_PREFIX, status);
+ if (U_FAILURE(status)) { return; }
+ consumeFormat(status);
+ if (U_FAILURE(status)) { return; }
+ consumeExponent(status);
+ if (U_FAILURE(status)) { return; }
+ consumePadding(PadPosition::UNUM_PAD_BEFORE_SUFFIX, status);
+ if (U_FAILURE(status)) { return; }
+ consumeAffix(currentSubpattern->suffixEndpoints, status);
+ if (U_FAILURE(status)) { return; }
+ consumePadding(PadPosition::UNUM_PAD_AFTER_SUFFIX, status);
+ if (U_FAILURE(status)) { return; }
+}
+
+void ParsedPatternInfo::consumePadding(PadPosition paddingLocation, UErrorCode& status) {
+ if (state.peek() != u'*') {
+ return;
+ }
+ if (currentSubpattern->hasPadding) {
+ state.toParseException(u"Cannot have multiple pad specifiers");
+ status = U_MULTIPLE_PAD_SPECIFIERS;
+ return;
+ }
+ currentSubpattern->paddingLocation = paddingLocation;
+ currentSubpattern->hasPadding = true;
+ state.next(); // consume the '*'
+ currentSubpattern->paddingEndpoints.start = state.offset;
+ consumeLiteral(status);
+ currentSubpattern->paddingEndpoints.end = state.offset;
+}
+
+void ParsedPatternInfo::consumeAffix(Endpoints& endpoints, UErrorCode& status) {
+ // literals := { literal }
+ endpoints.start = state.offset;
+ while (true) {
+ switch (state.peek()) {
+ case u'#':
+ case u'@':
+ case u';':
+ case u'*':
+ case u'.':
+ case u',':
+ case u'0':
+ case u'1':
+ case u'2':
+ case u'3':
+ case u'4':
+ case u'5':
+ case u'6':
+ case u'7':
+ case u'8':
+ case u'9':
+ case -1:
+ // Characters that cannot appear unquoted in a literal
+ // break outer;
+ goto after_outer;
+
+ case u'%':
+ currentSubpattern->hasPercentSign = true;
+ break;
+
+ case u'‰':
+ currentSubpattern->hasPerMilleSign = true;
+ break;
+
+ case u'¤':
+ currentSubpattern->hasCurrencySign = true;
+ break;
+
+ case u'-':
+ currentSubpattern->hasMinusSign = true;
+ break;
+
+ case u'+':
+ currentSubpattern->hasPlusSign = true;
+ break;
+
+ default:
+ break;
+ }
+ consumeLiteral(status);
+ if (U_FAILURE(status)) { return; }
+ }
+ after_outer:
+ endpoints.end = state.offset;
+}
+
+void ParsedPatternInfo::consumeLiteral(UErrorCode& status) {
+ if (state.peek() == -1) {
+ state.toParseException(u"Expected unquoted literal but found EOL");
+ status = U_PATTERN_SYNTAX_ERROR;
+ return;
+ } else if (state.peek() == u'\'') {
+ state.next(); // consume the starting quote
+ while (state.peek() != u'\'') {
+ if (state.peek() == -1) {
+ state.toParseException(u"Expected quoted literal but found EOL");
+ status = U_PATTERN_SYNTAX_ERROR;
+ return;
+ } else {
+ state.next(); // consume a quoted character
+ }
+ }
+ state.next(); // consume the ending quote
+ } else {
+ // consume a non-quoted literal character
+ state.next();
+ }
+}
+
+void ParsedPatternInfo::consumeFormat(UErrorCode& status) {
+ consumeIntegerFormat(status);
+ if (U_FAILURE(status)) { return; }
+ if (state.peek() == u'.') {
+ state.next(); // consume the decimal point
+ currentSubpattern->hasDecimal = true;
+ currentSubpattern->widthExceptAffixes += 1;
+ consumeFractionFormat(status);
+ if (U_FAILURE(status)) { return; }
+ }
+}
+
+void ParsedPatternInfo::consumeIntegerFormat(UErrorCode& status) {
+ // Convenience reference:
+ ParsedSubpatternInfo& result = *currentSubpattern;
+
+ while (true) {
+ switch (state.peek()) {
+ case u',':
+ result.widthExceptAffixes += 1;
+ result.groupingSizes <<= 16;
+ break;
+
+ case u'#':
+ if (result.integerNumerals > 0) {
+ state.toParseException(u"# cannot follow 0 before decimal point");
+ status = U_UNEXPECTED_TOKEN;
+ return;
+ }
+ result.widthExceptAffixes += 1;
+ result.groupingSizes += 1;
+ if (result.integerAtSigns > 0) {
+ result.integerTrailingHashSigns += 1;
+ } else {
+ result.integerLeadingHashSigns += 1;
+ }
+ result.integerTotal += 1;
+ break;
+
+ case u'@':
+ if (result.integerNumerals > 0) {
+ state.toParseException(u"Cannot mix 0 and @");
+ status = U_UNEXPECTED_TOKEN;
+ return;
+ }
+ if (result.integerTrailingHashSigns > 0) {
+ state.toParseException(u"Cannot nest # inside of a run of @");
+ status = U_UNEXPECTED_TOKEN;
+ return;
+ }
+ result.widthExceptAffixes += 1;
+ result.groupingSizes += 1;
+ result.integerAtSigns += 1;
+ result.integerTotal += 1;
+ break;
+
+ case u'0':
+ case u'1':
+ case u'2':
+ case u'3':
+ case u'4':
+ case u'5':
+ case u'6':
+ case u'7':
+ case u'8':
+ case u'9':
+ if (result.integerAtSigns > 0) {
+ state.toParseException(u"Cannot mix @ and 0");
+ status = U_UNEXPECTED_TOKEN;
+ return;
+ }
+ result.widthExceptAffixes += 1;
+ result.groupingSizes += 1;
+ result.integerNumerals += 1;
+ result.integerTotal += 1;
+ if (!result.rounding.isZeroish() || state.peek() != u'0') {
+ result.rounding.appendDigit(static_cast<int8_t>(state.peek() - u'0'), 0, true);
+ }
+ break;
+
+ default:
+ goto after_outer;
+ }
+ state.next(); // consume the symbol
+ }
+
+ after_outer:
+ // Disallow patterns with a trailing ',' or with two ',' next to each other
+ auto grouping1 = static_cast<int16_t> (result.groupingSizes & 0xffff);
+ auto grouping2 = static_cast<int16_t> ((result.groupingSizes >> 16) & 0xffff);
+ auto grouping3 = static_cast<int16_t> ((result.groupingSizes >> 32) & 0xffff);
+ if (grouping1 == 0 && grouping2 != -1) {
+ state.toParseException(u"Trailing grouping separator is invalid");
+ status = U_UNEXPECTED_TOKEN;
+ return;
+ }
+ if (grouping2 == 0 && grouping3 != -1) {
+ state.toParseException(u"Grouping width of zero is invalid");
+ status = U_PATTERN_SYNTAX_ERROR;
+ return;
+ }
+}
+
+void ParsedPatternInfo::consumeFractionFormat(UErrorCode& status) {
+ // Convenience reference:
+ ParsedSubpatternInfo& result = *currentSubpattern;
+
+ int32_t zeroCounter = 0;
+ while (true) {
+ switch (state.peek()) {
+ case u'#':
+ result.widthExceptAffixes += 1;
+ result.fractionHashSigns += 1;
+ result.fractionTotal += 1;
+ zeroCounter++;
+ break;
+
+ case u'0':
+ case u'1':
+ case u'2':
+ case u'3':
+ case u'4':
+ case u'5':
+ case u'6':
+ case u'7':
+ case u'8':
+ case u'9':
+ if (result.fractionHashSigns > 0) {
+ state.toParseException(u"0 cannot follow # after decimal point");
+ status = U_UNEXPECTED_TOKEN;
+ return;
+ }
+ result.widthExceptAffixes += 1;
+ result.fractionNumerals += 1;
+ result.fractionTotal += 1;
+ if (state.peek() == u'0') {
+ zeroCounter++;
+ } else {
+ result.rounding
+ .appendDigit(static_cast<int8_t>(state.peek() - u'0'), zeroCounter, false);
+ zeroCounter = 0;
+ }
+ break;
+
+ default:
+ return;
+ }
+ state.next(); // consume the symbol
+ }
+}
+
+void ParsedPatternInfo::consumeExponent(UErrorCode& status) {
+ // Convenience reference:
+ ParsedSubpatternInfo& result = *currentSubpattern;
+
+ if (state.peek() != u'E') {
+ return;
+ }
+ if ((result.groupingSizes & 0xffff0000L) != 0xffff0000L) {
+ state.toParseException(u"Cannot have grouping separator in scientific notation");
+ status = U_MALFORMED_EXPONENTIAL_PATTERN;
+ return;
+ }
+ state.next(); // consume the E
+ result.widthExceptAffixes++;
+ if (state.peek() == u'+') {
+ state.next(); // consume the +
+ result.exponentHasPlusSign = true;
+ result.widthExceptAffixes++;
+ }
+ while (state.peek() == u'0') {
+ state.next(); // consume the 0
+ result.exponentZeros += 1;
+ result.widthExceptAffixes++;
+ }
+}
+
+///////////////////////////////////////////////////
+/// END RECURSIVE DESCENT PARSER IMPLEMENTATION ///
+///////////////////////////////////////////////////
+
+void PatternParser::parseToExistingPropertiesImpl(const UnicodeString& pattern,
+ DecimalFormatProperties& properties,
+ IgnoreRounding ignoreRounding, UErrorCode& status) {
+ if (pattern.length() == 0) {
+ // Backwards compatibility requires that we reset to the default values.
+ // TODO: Only overwrite the properties that "saveToProperties" normally touches?
+ properties.clear();
+ return;
+ }
+
+ ParsedPatternInfo patternInfo;
+ parseToPatternInfo(pattern, patternInfo, status);
+ if (U_FAILURE(status)) { return; }
+ patternInfoToProperties(properties, patternInfo, ignoreRounding, status);
+}
+
+void
+PatternParser::patternInfoToProperties(DecimalFormatProperties& properties, ParsedPatternInfo& patternInfo,
+ IgnoreRounding _ignoreRounding, UErrorCode& status) {
+ // Translate from PatternParseResult to Properties.
+ // Note that most data from "negative" is ignored per the specification of DecimalFormat.
+
+ const ParsedSubpatternInfo& positive = patternInfo.positive;
+
+ bool ignoreRounding;
+ if (_ignoreRounding == IGNORE_ROUNDING_NEVER) {
+ ignoreRounding = false;
+ } else if (_ignoreRounding == IGNORE_ROUNDING_IF_CURRENCY) {
+ ignoreRounding = positive.hasCurrencySign;
+ } else {
+ U_ASSERT(_ignoreRounding == IGNORE_ROUNDING_ALWAYS);
+ ignoreRounding = true;
+ }
+
+ // Grouping settings
+ auto grouping1 = static_cast<int16_t> (positive.groupingSizes & 0xffff);
+ auto grouping2 = static_cast<int16_t> ((positive.groupingSizes >> 16) & 0xffff);
+ auto grouping3 = static_cast<int16_t> ((positive.groupingSizes >> 32) & 0xffff);
+ if (grouping2 != -1) {
+ properties.groupingSize = grouping1;
+ properties.groupingUsed = true;
+ } else {
+ properties.groupingSize = -1;
+ properties.groupingUsed = false;
+ }
+ if (grouping3 != -1) {
+ properties.secondaryGroupingSize = grouping2;
+ } else {
+ properties.secondaryGroupingSize = -1;
+ }
+
+ // For backwards compatibility, require that the pattern emit at least one min digit.
+ int minInt, minFrac;
+ if (positive.integerTotal == 0 && positive.fractionTotal > 0) {
+ // patterns like ".##"
+ minInt = 0;
+ minFrac = uprv_max(1, positive.fractionNumerals);
+ } else if (positive.integerNumerals == 0 && positive.fractionNumerals == 0) {
+ // patterns like "#.##"
+ minInt = 1;
+ minFrac = 0;
+ } else {
+ minInt = positive.integerNumerals;
+ minFrac = positive.fractionNumerals;
+ }
+
+ // Rounding settings
+ // Don't set basic rounding when there is a currency sign; defer to CurrencyUsage
+ if (positive.integerAtSigns > 0) {
+ properties.minimumFractionDigits = -1;
+ properties.maximumFractionDigits = -1;
+ properties.roundingIncrement = 0.0;
+ properties.minimumSignificantDigits = positive.integerAtSigns;
+ properties.maximumSignificantDigits = positive.integerAtSigns + positive.integerTrailingHashSigns;
+ } else if (!positive.rounding.isZeroish()) {
+ if (!ignoreRounding) {
+ properties.minimumFractionDigits = minFrac;
+ properties.maximumFractionDigits = positive.fractionTotal;
+ properties.roundingIncrement = positive.rounding.toDouble();
+ } else {
+ properties.minimumFractionDigits = -1;
+ properties.maximumFractionDigits = -1;
+ properties.roundingIncrement = 0.0;
+ }
+ properties.minimumSignificantDigits = -1;
+ properties.maximumSignificantDigits = -1;
+ } else {
+ if (!ignoreRounding) {
+ properties.minimumFractionDigits = minFrac;
+ properties.maximumFractionDigits = positive.fractionTotal;
+ properties.roundingIncrement = 0.0;
+ } else {
+ properties.minimumFractionDigits = -1;
+ properties.maximumFractionDigits = -1;
+ properties.roundingIncrement = 0.0;
+ }
+ properties.minimumSignificantDigits = -1;
+ properties.maximumSignificantDigits = -1;
+ }
+
+ // If the pattern ends with a '.' then force the decimal point.
+ if (positive.hasDecimal && positive.fractionTotal == 0) {
+ properties.decimalSeparatorAlwaysShown = true;
+ } else {
+ properties.decimalSeparatorAlwaysShown = false;
+ }
+
+ // Scientific notation settings
+ if (positive.exponentZeros > 0) {
+ properties.exponentSignAlwaysShown = positive.exponentHasPlusSign;
+ properties.minimumExponentDigits = positive.exponentZeros;
+ if (positive.integerAtSigns == 0) {
+ // patterns without '@' can define max integer digits, used for engineering notation
+ properties.minimumIntegerDigits = positive.integerNumerals;
+ properties.maximumIntegerDigits = positive.integerTotal;
+ } else {
+ // patterns with '@' cannot define max integer digits
+ properties.minimumIntegerDigits = 1;
+ properties.maximumIntegerDigits = -1;
+ }
+ } else {
+ properties.exponentSignAlwaysShown = false;
+ properties.minimumExponentDigits = -1;
+ properties.minimumIntegerDigits = minInt;
+ properties.maximumIntegerDigits = -1;
+ }
+
+ // Compute the affix patterns (required for both padding and affixes)
+ UnicodeString posPrefix = patternInfo.getString(AffixPatternProvider::AFFIX_PREFIX);
+ UnicodeString posSuffix = patternInfo.getString(0);
+
+ // Padding settings
+ if (positive.hasPadding) {
+ // The width of the positive prefix and suffix templates are included in the padding
+ int paddingWidth = positive.widthExceptAffixes +
+ AffixUtils::estimateLength(posPrefix, status) +
+ AffixUtils::estimateLength(posSuffix, status);
+ properties.formatWidth = paddingWidth;
+ UnicodeString rawPaddingString = patternInfo.getString(AffixPatternProvider::AFFIX_PADDING);
+ if (rawPaddingString.length() == 1) {
+ properties.padString = rawPaddingString;
+ } else if (rawPaddingString.length() == 2) {
+ if (rawPaddingString.charAt(0) == u'\'') {
+ properties.padString.setTo(u"'", -1);
+ } else {
+ properties.padString = rawPaddingString;
+ }
+ } else {
+ properties.padString = UnicodeString(rawPaddingString, 1, rawPaddingString.length() - 2);
+ }
+ properties.padPosition = positive.paddingLocation;
+ } else {
+ properties.formatWidth = -1;
+ properties.padString.setToBogus();
+ properties.padPosition.nullify();
+ }
+
+ // Set the affixes
+ // Always call the setter, even if the prefixes are empty, especially in the case of the
+ // negative prefix pattern, to prevent default values from overriding the pattern.
+ properties.positivePrefixPattern = posPrefix;
+ properties.positiveSuffixPattern = posSuffix;
+ if (patternInfo.fHasNegativeSubpattern) {
+ properties.negativePrefixPattern = patternInfo.getString(
+ AffixPatternProvider::AFFIX_NEGATIVE_SUBPATTERN | AffixPatternProvider::AFFIX_PREFIX);
+ properties.negativeSuffixPattern = patternInfo.getString(
+ AffixPatternProvider::AFFIX_NEGATIVE_SUBPATTERN);
+ } else {
+ properties.negativePrefixPattern.setToBogus();
+ properties.negativeSuffixPattern.setToBogus();
+ }
+
+ // Set the magnitude multiplier
+ if (positive.hasPercentSign) {
+ properties.magnitudeMultiplier = 2;
+ } else if (positive.hasPerMilleSign) {
+ properties.magnitudeMultiplier = 3;
+ } else {
+ properties.magnitudeMultiplier = 0;
+ }
+}
+
+///////////////////////////////////////////////////////////////////
+/// End PatternStringParser.java; begin PatternStringUtils.java ///
+///////////////////////////////////////////////////////////////////
+
+// Determine whether a given roundingIncrement should be ignored for formatting
+// based on the current maxFrac value (maximum fraction digits). For example a
+// roundingIncrement of 0.01 should be ignored if maxFrac is 1, but not if maxFrac
+// is 2 or more. Note that roundingIncrements are rounded in significance, so
+// a roundingIncrement of 0.006 is treated like 0.01 for this determination, i.e.
+// it should not be ignored if maxFrac is 2 or more (but a roundingIncrement of
+// 0.005 is treated like 0.001 for significance). This is the reason for the
+// initial doubling below.
+// roundIncr must be non-zero.
+bool PatternStringUtils::ignoreRoundingIncrement(double roundIncr, int32_t maxFrac) {
+ if (maxFrac < 0) {
+ return false;
+ }
+ int32_t frac = 0;
+ roundIncr *= 2.0;
+ for (frac = 0; frac <= maxFrac && roundIncr <= 1.0; frac++, roundIncr *= 10.0);
+ return (frac > maxFrac);
+}
+
+UnicodeString PatternStringUtils::propertiesToPatternString(const DecimalFormatProperties& properties,
+ UErrorCode& status) {
+ UnicodeString sb;
+
+ // Convenience references
+ // The uprv_min() calls prevent DoS
+ int32_t dosMax = 100;
+ int32_t grouping1 = uprv_max(0, uprv_min(properties.groupingSize, dosMax));
+ int32_t grouping2 = uprv_max(0, uprv_min(properties.secondaryGroupingSize, dosMax));
+ bool useGrouping = properties.groupingUsed;
+ int32_t paddingWidth = uprv_min(properties.formatWidth, dosMax);
+ NullableValue<PadPosition> paddingLocation = properties.padPosition;
+ UnicodeString paddingString = properties.padString;
+ int32_t minInt = uprv_max(0, uprv_min(properties.minimumIntegerDigits, dosMax));
+ int32_t maxInt = uprv_min(properties.maximumIntegerDigits, dosMax);
+ int32_t minFrac = uprv_max(0, uprv_min(properties.minimumFractionDigits, dosMax));
+ int32_t maxFrac = uprv_min(properties.maximumFractionDigits, dosMax);
+ int32_t minSig = uprv_min(properties.minimumSignificantDigits, dosMax);
+ int32_t maxSig = uprv_min(properties.maximumSignificantDigits, dosMax);
+ bool alwaysShowDecimal = properties.decimalSeparatorAlwaysShown;
+ int32_t exponentDigits = uprv_min(properties.minimumExponentDigits, dosMax);
+ bool exponentShowPlusSign = properties.exponentSignAlwaysShown;
+
+ AutoAffixPatternProvider affixProvider(properties, status);
+
+ // Prefixes
+ sb.append(affixProvider.get().getString(AffixPatternProvider::AFFIX_POS_PREFIX));
+ int32_t afterPrefixPos = sb.length();
+
+ // Figure out the grouping sizes.
+ if (!useGrouping) {
+ grouping1 = 0;
+ grouping2 = 0;
+ } else if (grouping1 == grouping2) {
+ grouping1 = 0;
+ }
+ int32_t groupingLength = grouping1 + grouping2 + 1;
+
+ // Figure out the digits we need to put in the pattern.
+ double roundingInterval = properties.roundingIncrement;
+ UnicodeString digitsString;
+ int32_t digitsStringScale = 0;
+ if (maxSig != uprv_min(dosMax, -1)) {
+ // Significant Digits.
+ while (digitsString.length() < minSig) {
+ digitsString.append(u'@');
+ }
+ while (digitsString.length() < maxSig) {
+ digitsString.append(u'#');
+ }
+ } else if (roundingInterval != 0.0 && !ignoreRoundingIncrement(roundingInterval,maxFrac)) {
+ // Rounding Interval.
+ digitsStringScale = -roundingutils::doubleFractionLength(roundingInterval, nullptr);
+ // TODO: Check for DoS here?
+ DecimalQuantity incrementQuantity;
+ incrementQuantity.setToDouble(roundingInterval);
+ incrementQuantity.adjustMagnitude(-digitsStringScale);
+ incrementQuantity.roundToMagnitude(0, kDefaultMode, status);
+ UnicodeString str = incrementQuantity.toPlainString();
+ if (str.charAt(0) == u'-') {
+ // TODO: Unsupported operation exception or fail silently?
+ digitsString.append(str, 1, str.length() - 1);
+ } else {
+ digitsString.append(str);
+ }
+ }
+ while (digitsString.length() + digitsStringScale < minInt) {
+ digitsString.insert(0, u'0');
+ }
+ while (-digitsStringScale < minFrac) {
+ digitsString.append(u'0');
+ digitsStringScale--;
+ }
+
+ // Write the digits to the string builder
+ int32_t m0 = uprv_max(groupingLength, digitsString.length() + digitsStringScale);
+ m0 = (maxInt != dosMax) ? uprv_max(maxInt, m0) - 1 : m0 - 1;
+ int32_t mN = (maxFrac != dosMax) ? uprv_min(-maxFrac, digitsStringScale) : digitsStringScale;
+ for (int32_t magnitude = m0; magnitude >= mN; magnitude--) {
+ int32_t di = digitsString.length() + digitsStringScale - magnitude - 1;
+ if (di < 0 || di >= digitsString.length()) {
+ sb.append(u'#');
+ } else {
+ sb.append(digitsString.charAt(di));
+ }
+ // Decimal separator
+ if (magnitude == 0 && (alwaysShowDecimal || mN < 0)) {
+ sb.append(u'.');
+ }
+ if (!useGrouping) {
+ continue;
+ }
+ // Least-significant grouping separator
+ if (magnitude > 0 && magnitude == grouping1) {
+ sb.append(u',');
+ }
+ // All other grouping separators
+ if (magnitude > grouping1 && grouping2 > 0 && (magnitude - grouping1) % grouping2 == 0) {
+ sb.append(u',');
+ }
+ }
+
+ // Exponential notation
+ if (exponentDigits != uprv_min(dosMax, -1)) {
+ sb.append(u'E');
+ if (exponentShowPlusSign) {
+ sb.append(u'+');
+ }
+ for (int32_t i = 0; i < exponentDigits; i++) {
+ sb.append(u'0');
+ }
+ }
+
+ // Suffixes
+ int32_t beforeSuffixPos = sb.length();
+ sb.append(affixProvider.get().getString(AffixPatternProvider::AFFIX_POS_SUFFIX));
+
+ // Resolve Padding
+ if (paddingWidth > 0 && !paddingLocation.isNull()) {
+ while (paddingWidth - sb.length() > 0) {
+ sb.insert(afterPrefixPos, u'#');
+ beforeSuffixPos++;
+ }
+ int32_t addedLength;
+ switch (paddingLocation.get(status)) {
+ case PadPosition::UNUM_PAD_BEFORE_PREFIX:
+ addedLength = escapePaddingString(paddingString, sb, 0, status);
+ sb.insert(0, u'*');
+ afterPrefixPos += addedLength + 1;
+ beforeSuffixPos += addedLength + 1;
+ break;
+ case PadPosition::UNUM_PAD_AFTER_PREFIX:
+ addedLength = escapePaddingString(paddingString, sb, afterPrefixPos, status);
+ sb.insert(afterPrefixPos, u'*');
+ afterPrefixPos += addedLength + 1;
+ beforeSuffixPos += addedLength + 1;
+ break;
+ case PadPosition::UNUM_PAD_BEFORE_SUFFIX:
+ escapePaddingString(paddingString, sb, beforeSuffixPos, status);
+ sb.insert(beforeSuffixPos, u'*');
+ break;
+ case PadPosition::UNUM_PAD_AFTER_SUFFIX:
+ sb.append(u'*');
+ escapePaddingString(paddingString, sb, sb.length(), status);
+ break;
+ }
+ if (U_FAILURE(status)) { return sb; }
+ }
+
+ // Negative affixes
+ // Ignore if the negative prefix pattern is "-" and the negative suffix is empty
+ if (affixProvider.get().hasNegativeSubpattern()) {
+ sb.append(u';');
+ sb.append(affixProvider.get().getString(AffixPatternProvider::AFFIX_NEG_PREFIX));
+ // Copy the positive digit format into the negative.
+ // This is optional; the pattern is the same as if '#' were appended here instead.
+ // NOTE: It is not safe to append the UnicodeString to itself, so we need to copy.
+ // See http://bugs.icu-project.org/trac/ticket/13707
+ UnicodeString copy(sb);
+ sb.append(copy, afterPrefixPos, beforeSuffixPos - afterPrefixPos);
+ sb.append(affixProvider.get().getString(AffixPatternProvider::AFFIX_NEG_SUFFIX));
+ }
+
+ return sb;
+}
+
+int PatternStringUtils::escapePaddingString(UnicodeString input, UnicodeString& output, int startIndex,
+ UErrorCode& status) {
+ (void) status;
+ if (input.length() == 0) {
+ input.setTo(kFallbackPaddingString, -1);
+ }
+ int startLength = output.length();
+ if (input.length() == 1) {
+ if (input.compare(u"'", -1) == 0) {
+ output.insert(startIndex, u"''", -1);
+ } else {
+ output.insert(startIndex, input);
+ }
+ } else {
+ output.insert(startIndex, u'\'');
+ int offset = 1;
+ for (int i = 0; i < input.length(); i++) {
+ // it's okay to deal in chars here because the quote mark is the only interesting thing.
+ char16_t ch = input.charAt(i);
+ if (ch == u'\'') {
+ output.insert(startIndex + offset, u"''", -1);
+ offset += 2;
+ } else {
+ output.insert(startIndex + offset, ch);
+ offset += 1;
+ }
+ }
+ output.insert(startIndex + offset, u'\'');
+ }
+ return output.length() - startLength;
+}
+
+UnicodeString
+PatternStringUtils::convertLocalized(const UnicodeString& input, const DecimalFormatSymbols& symbols,
+ bool toLocalized, UErrorCode& status) {
+ // Construct a table of strings to be converted between localized and standard.
+ static constexpr int32_t LEN = 21;
+ UnicodeString table[LEN][2];
+ int standIdx = toLocalized ? 0 : 1;
+ int localIdx = toLocalized ? 1 : 0;
+ table[0][standIdx] = u"%";
+ table[0][localIdx] = symbols.getConstSymbol(DecimalFormatSymbols::kPercentSymbol);
+ table[1][standIdx] = u"‰";
+ table[1][localIdx] = symbols.getConstSymbol(DecimalFormatSymbols::kPerMillSymbol);
+ table[2][standIdx] = u".";
+ table[2][localIdx] = symbols.getConstSymbol(DecimalFormatSymbols::kDecimalSeparatorSymbol);
+ table[3][standIdx] = u",";
+ table[3][localIdx] = symbols.getConstSymbol(DecimalFormatSymbols::kGroupingSeparatorSymbol);
+ table[4][standIdx] = u"-";
+ table[4][localIdx] = symbols.getConstSymbol(DecimalFormatSymbols::kMinusSignSymbol);
+ table[5][standIdx] = u"+";
+ table[5][localIdx] = symbols.getConstSymbol(DecimalFormatSymbols::kPlusSignSymbol);
+ table[6][standIdx] = u";";
+ table[6][localIdx] = symbols.getConstSymbol(DecimalFormatSymbols::kPatternSeparatorSymbol);
+ table[7][standIdx] = u"@";
+ table[7][localIdx] = symbols.getConstSymbol(DecimalFormatSymbols::kSignificantDigitSymbol);
+ table[8][standIdx] = u"E";
+ table[8][localIdx] = symbols.getConstSymbol(DecimalFormatSymbols::kExponentialSymbol);
+ table[9][standIdx] = u"*";
+ table[9][localIdx] = symbols.getConstSymbol(DecimalFormatSymbols::kPadEscapeSymbol);
+ table[10][standIdx] = u"#";
+ table[10][localIdx] = symbols.getConstSymbol(DecimalFormatSymbols::kDigitSymbol);
+ for (int i = 0; i < 10; i++) {
+ table[11 + i][standIdx] = u'0' + i;
+ table[11 + i][localIdx] = symbols.getConstDigitSymbol(i);
+ }
+
+ // Special case: quotes are NOT allowed to be in any localIdx strings.
+ // Substitute them with '’' instead.
+ for (int32_t i = 0; i < LEN; i++) {
+ table[i][localIdx].findAndReplace(u'\'', u'’');
+ }
+
+ // Iterate through the string and convert.
+ // State table:
+ // 0 => base state
+ // 1 => first char inside a quoted sequence in input and output string
+ // 2 => inside a quoted sequence in input and output string
+ // 3 => first char after a close quote in input string;
+ // close quote still needs to be written to output string
+ // 4 => base state in input string; inside quoted sequence in output string
+ // 5 => first char inside a quoted sequence in input string;
+ // inside quoted sequence in output string
+ UnicodeString result;
+ int state = 0;
+ for (int offset = 0; offset < input.length(); offset++) {
+ UChar ch = input.charAt(offset);
+
+ // Handle a quote character (state shift)
+ if (ch == u'\'') {
+ if (state == 0) {
+ result.append(u'\'');
+ state = 1;
+ continue;
+ } else if (state == 1) {
+ result.append(u'\'');
+ state = 0;
+ continue;
+ } else if (state == 2) {
+ state = 3;
+ continue;
+ } else if (state == 3) {
+ result.append(u'\'');
+ result.append(u'\'');
+ state = 1;
+ continue;
+ } else if (state == 4) {
+ state = 5;
+ continue;
+ } else {
+ U_ASSERT(state == 5);
+ result.append(u'\'');
+ result.append(u'\'');
+ state = 4;
+ continue;
+ }
+ }
+
+ if (state == 0 || state == 3 || state == 4) {
+ for (auto& pair : table) {
+ // Perform a greedy match on this symbol string
+ UnicodeString temp = input.tempSubString(offset, pair[0].length());
+ if (temp == pair[0]) {
+ // Skip ahead past this region for the next iteration
+ offset += pair[0].length() - 1;
+ if (state == 3 || state == 4) {
+ result.append(u'\'');
+ state = 0;
+ }
+ result.append(pair[1]);
+ goto continue_outer;
+ }
+ }
+ // No replacement found. Check if a special quote is necessary
+ for (auto& pair : table) {
+ UnicodeString temp = input.tempSubString(offset, pair[1].length());
+ if (temp == pair[1]) {
+ if (state == 0) {
+ result.append(u'\'');
+ state = 4;
+ }
+ result.append(ch);
+ goto continue_outer;
+ }
+ }
+ // Still nothing. Copy the char verbatim. (Add a close quote if necessary)
+ if (state == 3 || state == 4) {
+ result.append(u'\'');
+ state = 0;
+ }
+ result.append(ch);
+ } else {
+ U_ASSERT(state == 1 || state == 2 || state == 5);
+ result.append(ch);
+ state = 2;
+ }
+ continue_outer:;
+ }
+ // Resolve final quotes
+ if (state == 3 || state == 4) {
+ result.append(u'\'');
+ state = 0;
+ }
+ if (state != 0) {
+ // Malformed localized pattern: unterminated quote
+ status = U_PATTERN_SYNTAX_ERROR;
+ }
+ return result;
+}
+
+void PatternStringUtils::patternInfoToStringBuilder(const AffixPatternProvider& patternInfo, bool isPrefix,
+ PatternSignType patternSignType,
+ StandardPlural::Form plural,
+ bool perMilleReplacesPercent, UnicodeString& output) {
+
+ // Should the output render '+' where '-' would normally appear in the pattern?
+ bool plusReplacesMinusSign = (patternSignType == PATTERN_SIGN_TYPE_POS_SIGN)
+ && !patternInfo.positiveHasPlusSign();
+
+ // Should we use the affix from the negative subpattern?
+ // (If not, we will use the positive subpattern.)
+ bool useNegativeAffixPattern = patternInfo.hasNegativeSubpattern()
+ && (patternSignType == PATTERN_SIGN_TYPE_NEG
+ || (patternInfo.negativeHasMinusSign() && plusReplacesMinusSign));
+
+ // Resolve the flags for the affix pattern.
+ int flags = 0;
+ if (useNegativeAffixPattern) {
+ flags |= AffixPatternProvider::AFFIX_NEGATIVE_SUBPATTERN;
+ }
+ if (isPrefix) {
+ flags |= AffixPatternProvider::AFFIX_PREFIX;
+ }
+ if (plural != StandardPlural::Form::COUNT) {
+ U_ASSERT(plural == (AffixPatternProvider::AFFIX_PLURAL_MASK & plural));
+ flags |= plural;
+ }
+
+ // Should we prepend a sign to the pattern?
+ bool prependSign;
+ if (!isPrefix || useNegativeAffixPattern) {
+ prependSign = false;
+ } else if (patternSignType == PATTERN_SIGN_TYPE_NEG) {
+ prependSign = true;
+ } else {
+ prependSign = plusReplacesMinusSign;
+ }
+
+ // Compute the length of the affix pattern.
+ int length = patternInfo.length(flags) + (prependSign ? 1 : 0);
+
+ // Finally, set the result into the StringBuilder.
+ output.remove();
+ for (int index = 0; index < length; index++) {
+ char16_t candidate;
+ if (prependSign && index == 0) {
+ candidate = u'-';
+ } else if (prependSign) {
+ candidate = patternInfo.charAt(flags, index - 1);
+ } else {
+ candidate = patternInfo.charAt(flags, index);
+ }
+ if (plusReplacesMinusSign && candidate == u'-') {
+ candidate = u'+';
+ }
+ if (perMilleReplacesPercent && candidate == u'%') {
+ candidate = u'‰';
+ }
+ output.append(candidate);
+ }
+}
+
+PatternSignType PatternStringUtils::resolveSignDisplay(UNumberSignDisplay signDisplay, Signum signum) {
+ switch (signDisplay) {
+ case UNUM_SIGN_AUTO:
+ case UNUM_SIGN_ACCOUNTING:
+ switch (signum) {
+ case SIGNUM_NEG:
+ case SIGNUM_NEG_ZERO:
+ return PATTERN_SIGN_TYPE_NEG;
+ case SIGNUM_POS_ZERO:
+ case SIGNUM_POS:
+ return PATTERN_SIGN_TYPE_POS;
+ default:
+ break;
+ }
+ break;
+
+ case UNUM_SIGN_ALWAYS:
+ case UNUM_SIGN_ACCOUNTING_ALWAYS:
+ switch (signum) {
+ case SIGNUM_NEG:
+ case SIGNUM_NEG_ZERO:
+ return PATTERN_SIGN_TYPE_NEG;
+ case SIGNUM_POS_ZERO:
+ case SIGNUM_POS:
+ return PATTERN_SIGN_TYPE_POS_SIGN;
+ default:
+ break;
+ }
+ break;
+
+ case UNUM_SIGN_EXCEPT_ZERO:
+ case UNUM_SIGN_ACCOUNTING_EXCEPT_ZERO:
+ switch (signum) {
+ case SIGNUM_NEG:
+ return PATTERN_SIGN_TYPE_NEG;
+ case SIGNUM_NEG_ZERO:
+ case SIGNUM_POS_ZERO:
+ return PATTERN_SIGN_TYPE_POS;
+ case SIGNUM_POS:
+ return PATTERN_SIGN_TYPE_POS_SIGN;
+ default:
+ break;
+ }
+ break;
+
+ case UNUM_SIGN_NEVER:
+ return PATTERN_SIGN_TYPE_POS;
+
+ default:
+ break;
+ }
+
+ UPRV_UNREACHABLE;
+ return PATTERN_SIGN_TYPE_POS;
+}
+
+#endif /* #if !UCONFIG_NO_FORMATTING */
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