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