1 /* 2 ******************************************************************************* 3 * Copyright (C) 1997-2005, 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 RuleBasedNumberFormat; 29 class UnicodeString; 30 31 class NFRule : public UMemory { 32 public: 33 34 enum ERuleType { 35 kNoBase = 0, 36 kNegativeNumberRule = -1, 37 kImproperFractionRule = -2, 38 kProperFractionRule = -3, 39 kMasterRule = -4, 40 kOtherRule = -5 41 }; 42 43 static void makeRules(UnicodeString& definition, 44 const NFRuleSet* ruleSet, 45 const NFRule* predecessor, 46 const RuleBasedNumberFormat* rbnf, 47 NFRuleList& ruleList, 48 UErrorCode& status); 49 50 NFRule(const RuleBasedNumberFormat* rbnf); 51 ~NFRule(); 52 53 UBool operator==(const NFRule& rhs) const; 54 UBool operator!=(const NFRule& rhs) const { return !operator==(rhs); } 55 getType()56 ERuleType getType() const { return (ERuleType)(baseValue <= kNoBase ? (ERuleType)baseValue : kOtherRule); } setType(ERuleType ruleType)57 void setType(ERuleType ruleType) { baseValue = (int32_t)ruleType; } 58 getBaseValue()59 int64_t getBaseValue() const { return baseValue; } 60 void setBaseValue(int64_t value, UErrorCode& status); 61 getDivisor()62 double getDivisor() const { return uprv_pow(radix, exponent); } 63 64 void doFormat(int64_t number, UnicodeString& toAppendTo, int32_t pos) const; 65 void doFormat(double number, UnicodeString& toAppendTo, int32_t pos) const; 66 67 UBool doParse(const UnicodeString& text, 68 ParsePosition& pos, 69 UBool isFractional, 70 double upperBound, 71 Formattable& result) const; 72 73 UBool shouldRollBack(double number) const; 74 75 void _appendRuleText(UnicodeString& result) const; 76 77 private: 78 void parseRuleDescriptor(UnicodeString& descriptor, UErrorCode& status); 79 void extractSubstitutions(const NFRuleSet* ruleSet, const NFRule* predecessor, const RuleBasedNumberFormat* rbnf, UErrorCode& status); 80 NFSubstitution* extractSubstitution(const NFRuleSet* ruleSet, const NFRule* predecessor, const RuleBasedNumberFormat* rbnf, UErrorCode& status); 81 82 int16_t expectedExponent() const; 83 int32_t indexOfAny(const UChar* const strings[]) const; 84 double matchToDelimiter(const UnicodeString& text, int32_t startPos, double baseValue, 85 const UnicodeString& delimiter, ParsePosition& pp, const NFSubstitution* sub, 86 double upperBound) const; 87 void stripPrefix(UnicodeString& text, const UnicodeString& prefix, ParsePosition& pp) const; 88 89 int32_t prefixLength(const UnicodeString& str, const UnicodeString& prefix) const; 90 UBool allIgnorable(const UnicodeString& str) const; 91 int32_t findText(const UnicodeString& str, const UnicodeString& key, 92 int32_t startingAt, int32_t* resultCount) const; 93 94 private: 95 int64_t baseValue; 96 int32_t radix; 97 int16_t exponent; 98 UnicodeString ruleText; 99 NFSubstitution* sub1; 100 NFSubstitution* sub2; 101 const RuleBasedNumberFormat* formatter; 102 103 NFRule(const NFRule &other); // forbid copying of this class 104 NFRule &operator=(const NFRule &other); // forbid copying of this class 105 }; 106 107 U_NAMESPACE_END 108 109 /* U_HAVE_RBNF */ 110 #endif 111 112 // NFRULE_H 113 #endif 114 115