1 // © 2016 and later: Unicode, Inc. and others. 2 // License & terms of use: http://www.unicode.org/copyright.html 3 /* 4 ******************************************************************************* 5 * Copyright (C) 1997-2015, International Business Machines 6 * Corporation and others. All Rights Reserved. 7 ******************************************************************************* 8 */ 9 10 #ifndef NFRULE_H 11 #define NFRULE_H 12 13 #include "unicode/rbnf.h" 14 15 #if U_HAVE_RBNF 16 17 #include "unicode/utypes.h" 18 #include "unicode/uobject.h" 19 #include "unicode/unistr.h" 20 21 U_NAMESPACE_BEGIN 22 23 class FieldPosition; 24 class Formattable; 25 class NFRuleList; 26 class NFRuleSet; 27 class NFSubstitution; 28 class ParsePosition; 29 class PluralFormat; 30 class RuleBasedNumberFormat; 31 class UnicodeString; 32 33 class NFRule : public UMemory { 34 public: 35 36 enum ERuleType { 37 kNoBase = 0, 38 kNegativeNumberRule = -1, 39 kImproperFractionRule = -2, 40 kProperFractionRule = -3, 41 kMasterRule = -4, 42 kInfinityRule = -5, 43 kNaNRule = -6, 44 kOtherRule = -7 45 }; 46 47 static void makeRules(UnicodeString& definition, 48 NFRuleSet* ruleSet, 49 const NFRule* predecessor, 50 const RuleBasedNumberFormat* rbnf, 51 NFRuleList& ruleList, 52 UErrorCode& status); 53 54 NFRule(const RuleBasedNumberFormat* rbnf, const UnicodeString &ruleText, UErrorCode &status); 55 ~NFRule(); 56 57 UBool operator==(const NFRule& rhs) const; 58 UBool operator!=(const NFRule& rhs) const { return !operator==(rhs); } 59 getType()60 ERuleType getType() const { return (ERuleType)(baseValue <= kNoBase ? (ERuleType)baseValue : kOtherRule); } setType(ERuleType ruleType)61 void setType(ERuleType ruleType) { baseValue = (int32_t)ruleType; } 62 getBaseValue()63 int64_t getBaseValue() const { return baseValue; } 64 void setBaseValue(int64_t value, UErrorCode& status); 65 getDecimalPoint()66 UChar getDecimalPoint() const { return decimalPoint; } 67 68 int64_t getDivisor() const; 69 70 void doFormat(int64_t number, UnicodeString& toAppendTo, int32_t pos, int32_t recursionCount, UErrorCode& status) const; 71 void doFormat(double number, UnicodeString& toAppendTo, int32_t pos, int32_t recursionCount, UErrorCode& status) const; 72 73 UBool doParse(const UnicodeString& text, 74 ParsePosition& pos, 75 UBool isFractional, 76 double upperBound, 77 Formattable& result) const; 78 79 UBool shouldRollBack(int64_t number) const; 80 81 void _appendRuleText(UnicodeString& result) const; 82 83 int32_t findTextLenient(const UnicodeString& str, const UnicodeString& key, 84 int32_t startingAt, int32_t* resultCount) const; 85 86 void setDecimalFormatSymbols(const DecimalFormatSymbols &newSymbols, UErrorCode& status); 87 88 private: 89 void parseRuleDescriptor(UnicodeString& descriptor, UErrorCode& status); 90 void extractSubstitutions(const NFRuleSet* ruleSet, const UnicodeString &ruleText, const NFRule* predecessor, UErrorCode& status); 91 NFSubstitution* extractSubstitution(const NFRuleSet* ruleSet, const NFRule* predecessor, UErrorCode& status); 92 93 int16_t expectedExponent() const; 94 int32_t indexOfAnyRulePrefix() const; 95 double matchToDelimiter(const UnicodeString& text, int32_t startPos, double baseValue, 96 const UnicodeString& delimiter, ParsePosition& pp, const NFSubstitution* sub, 97 double upperBound) const; 98 void stripPrefix(UnicodeString& text, const UnicodeString& prefix, ParsePosition& pp) const; 99 100 int32_t prefixLength(const UnicodeString& str, const UnicodeString& prefix, UErrorCode& status) const; 101 UBool allIgnorable(const UnicodeString& str, UErrorCode& status) const; 102 int32_t findText(const UnicodeString& str, const UnicodeString& key, 103 int32_t startingAt, int32_t* resultCount) const; 104 105 private: 106 int64_t baseValue; 107 int32_t radix; 108 int16_t exponent; 109 UChar decimalPoint; 110 UnicodeString ruleText; 111 NFSubstitution* sub1; 112 NFSubstitution* sub2; 113 const RuleBasedNumberFormat* formatter; 114 const PluralFormat* rulePatternFormat; 115 116 NFRule(const NFRule &other); // forbid copying of this class 117 NFRule &operator=(const NFRule &other); // forbid copying of this class 118 }; 119 120 U_NAMESPACE_END 121 122 /* U_HAVE_RBNF */ 123 #endif 124 125 // NFRULE_H 126 #endif 127 128