// © 2018 and later: Unicode, Inc. and others. // License & terms of use: http://www.unicode.org/copyright.html #include "unicode/utypes.h" #if !UCONFIG_NO_FORMATTING #ifndef __SOURCE_NUMBER_SKELETONS_H__ #define __SOURCE_NUMBER_SKELETONS_H__ #include "number_types.h" #include "numparse_types.h" #include "unicode/ucharstrie.h" #include "string_segment.h" U_NAMESPACE_BEGIN namespace number { namespace impl { // Forward-declaration struct SeenMacroProps; // namespace for enums and entrypoint functions namespace skeleton { //////////////////////////////////////////////////////////////////////////////////////// // NOTE: For examples of how to add a new stem to the number skeleton parser, see: // // https://github.com/unicode-org/icu/commit/a2a7982216b2348070dc71093775ac7195793d73 // // and // // https://github.com/unicode-org/icu/commit/6fe86f3934a8a5701034f648a8f7c5087e84aa28 // //////////////////////////////////////////////////////////////////////////////////////// /** * While parsing a skeleton, this enum records what type of option we expect to find next. */ enum ParseState { … }; /** * All possible stem literals have an entry in the StemEnum. The enum name is the kebab case stem * string literal written in upper snake case. * * @see StemToObject * @see #SERIALIZED_STEM_TRIE */ enum StemEnum { … }; /** Default wildcard char, accepted on input and printed in output */ constexpr char16_t kWildcardChar = …; /** Alternative wildcard char, accept on input but not printed in output */ constexpr char16_t kAltWildcardChar = …; /** Checks whether the char is a wildcard on input */ inline bool isWildcardChar(char16_t c) { … } /** * Creates a NumberFormatter corresponding to the given skeleton string. * * @param skeletonString * A number skeleton string, possibly not in its shortest form. * @return An UnlocalizedNumberFormatter with behavior defined by the given skeleton string. */ UnlocalizedNumberFormatter create( const UnicodeString& skeletonString, UParseError* perror, UErrorCode& status); /** * Create a skeleton string corresponding to the given NumberFormatter. * * @param macros * The NumberFormatter options object. * @return A skeleton string in normalized form. */ UnicodeString generate(const MacroProps& macros, UErrorCode& status); /** * Converts from a skeleton string to a MacroProps. This method contains the primary parse loop. * * Internal: use the create() endpoint instead of this function. */ MacroProps parseSkeleton(const UnicodeString& skeletonString, int32_t& errOffset, UErrorCode& status); /** * Given that the current segment represents a stem, parse it and save the result. * * @return The next state after parsing this stem, corresponding to what subset of options to expect. */ ParseState parseStem(const StringSegment& segment, const UCharsTrie& stemTrie, SeenMacroProps& seen, MacroProps& macros, UErrorCode& status); /** * Given that the current segment represents an option, parse it and save the result. * * @return The next state after parsing this option, corresponding to what subset of options to * expect next. */ ParseState parseOption(ParseState stem, const StringSegment& segment, MacroProps& macros, UErrorCode& status); } // namespace skeleton /** * Namespace for utility methods that convert from StemEnum to corresponding objects or enums. This * applies to only the "Section 1" stems, those that are well-defined without an option. */ namespace stem_to_object { Notation notation(skeleton::StemEnum stem); MeasureUnit unit(skeleton::StemEnum stem); Precision precision(skeleton::StemEnum stem); UNumberFormatRoundingMode roundingMode(skeleton::StemEnum stem); UNumberGroupingStrategy groupingStrategy(skeleton::StemEnum stem); UNumberUnitWidth unitWidth(skeleton::StemEnum stem); UNumberSignDisplay signDisplay(skeleton::StemEnum stem); UNumberDecimalSeparatorDisplay decimalSeparatorDisplay(skeleton::StemEnum stem); } // namespace stem_to_object /** * Namespace for utility methods that convert from enums to stem strings. More complex object conversions * take place in the object_to_stem_string namespace. */ namespace enum_to_stem_string { void roundingMode(UNumberFormatRoundingMode value, UnicodeString& sb); void groupingStrategy(UNumberGroupingStrategy value, UnicodeString& sb); void unitWidth(UNumberUnitWidth value, UnicodeString& sb); void signDisplay(UNumberSignDisplay value, UnicodeString& sb); void decimalSeparatorDisplay(UNumberDecimalSeparatorDisplay value, UnicodeString& sb); } // namespace enum_to_stem_string /** * Namespace for utility methods for processing stems and options that cannot be interpreted literally. */ namespace blueprint_helpers { /** @return Whether we successfully found and parsed an exponent width option. */ bool parseExponentWidthOption(const StringSegment& segment, MacroProps& macros, UErrorCode& status); void generateExponentWidthOption(int32_t minExponentDigits, UnicodeString& sb, UErrorCode& status); /** @return Whether we successfully found and parsed an exponent sign option. */ bool parseExponentSignOption(const StringSegment& segment, MacroProps& macros, UErrorCode& status); void parseCurrencyOption(const StringSegment& segment, MacroProps& macros, UErrorCode& status); void generateCurrencyOption(const CurrencyUnit& currency, UnicodeString& sb, UErrorCode& status); // "measure-unit/" is deprecated in favour of "unit/". void parseMeasureUnitOption(const StringSegment& segment, MacroProps& macros, UErrorCode& status); // "per-measure-unit/" is deprecated in favour of "unit/". void parseMeasurePerUnitOption(const StringSegment& segment, MacroProps& macros, UErrorCode& status); /** * Parses unit identifiers like "meter-per-second" and "foot-and-inch", as * specified via a "unit/" concise skeleton. */ void parseIdentifierUnitOption(const StringSegment& segment, MacroProps& macros, UErrorCode& status); void parseUnitUsageOption(const StringSegment& segment, MacroProps& macros, UErrorCode& status); void parseFractionStem(const StringSegment& segment, MacroProps& macros, UErrorCode& status); void generateFractionStem(int32_t minFrac, int32_t maxFrac, UnicodeString& sb, UErrorCode& status); void parseDigitsStem(const StringSegment& segment, MacroProps& macros, UErrorCode& status); void generateDigitsStem(int32_t minSig, int32_t maxSig, UnicodeString& sb, UErrorCode& status); void parseScientificStem(const StringSegment& segment, MacroProps& macros, UErrorCode& status); // Note: no generateScientificStem since this syntax was added later in ICU 67 void parseIntegerStem(const StringSegment& segment, MacroProps& macros, UErrorCode& status); // Note: no generateIntegerStem since this syntax was added later in ICU 67 /** @return Whether we successfully found and parsed a frac-sig option. */ bool parseFracSigOption(const StringSegment& segment, MacroProps& macros, UErrorCode& status); /** @return Whether we successfully found and parsed a trailing zero option. */ bool parseTrailingZeroOption(const StringSegment& segment, MacroProps& macros, UErrorCode& status); void parseIncrementOption(const StringSegment& segment, MacroProps& macros, UErrorCode& status); void generateIncrementOption(uint32_t increment, digits_t incrementMagnitude, int32_t minFrac, UnicodeString& sb, UErrorCode& status); void parseIntegerWidthOption(const StringSegment& segment, MacroProps& macros, UErrorCode& status); void generateIntegerWidthOption(int32_t minInt, int32_t maxInt, UnicodeString& sb, UErrorCode& status); void parseNumberingSystemOption(const StringSegment& segment, MacroProps& macros, UErrorCode& status); void generateNumberingSystemOption(const NumberingSystem& ns, UnicodeString& sb, UErrorCode& status); void parseScaleOption(const StringSegment& segment, MacroProps& macros, UErrorCode& status); void generateScaleOption(int32_t magnitude, const DecNum* arbitrary, UnicodeString& sb, UErrorCode& status); } // namespace blueprint_helpers /** * Class for utility methods for generating a token corresponding to each macro-prop. Each method * returns whether or not a token was written to the string builder. * * This needs to be a class, not a namespace, so it can be friended. */ class GeneratorHelpers { … }; /** * Struct for null-checking. * In Java, we can just check the object reference. In C++, we need a different method. */ struct SeenMacroProps { … }; namespace { #define SKELETON_UCHAR_TO_CHAR(dest, src, start, end, status) … } // namespace } // namespace impl } // namespace number U_NAMESPACE_END #endif //__SOURCE_NUMBER_SKELETONS_H__ #endif /* #if !UCONFIG_NO_FORMATTING */
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