Victor Chang | 7322950 | 2020-09-17 13:39:19 +0100 | [diff] [blame] | 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, |
Victor Chang | ce4bf3c | 2021-01-19 16:34:24 +0000 | [diff] [blame] | 41 | kDefaultRule = -4, |
Victor Chang | 7322950 | 2020-09-17 13:39:19 +0100 | [diff] [blame] | 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 | |
| 60 | ERuleType getType() const { return (ERuleType)(baseValue <= kNoBase ? (ERuleType)baseValue : kOtherRule); } |
| 61 | void setType(ERuleType ruleType) { baseValue = (int32_t)ruleType; } |
| 62 | |
| 63 | int64_t getBaseValue() const { return baseValue; } |
| 64 | void setBaseValue(int64_t value, UErrorCode& status); |
| 65 | |
| 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 | uint32_t nonNumericalExecutedRuleMask, |
| 78 | Formattable& result) const; |
| 79 | |
| 80 | UBool shouldRollBack(int64_t number) const; |
| 81 | |
| 82 | void _appendRuleText(UnicodeString& result) const; |
| 83 | |
| 84 | int32_t findTextLenient(const UnicodeString& str, const UnicodeString& key, |
| 85 | int32_t startingAt, int32_t* resultCount) const; |
| 86 | |
| 87 | void setDecimalFormatSymbols(const DecimalFormatSymbols &newSymbols, UErrorCode& status); |
| 88 | |
| 89 | private: |
| 90 | void parseRuleDescriptor(UnicodeString& descriptor, UErrorCode& status); |
| 91 | void extractSubstitutions(const NFRuleSet* ruleSet, const UnicodeString &ruleText, const NFRule* predecessor, UErrorCode& status); |
| 92 | NFSubstitution* extractSubstitution(const NFRuleSet* ruleSet, const NFRule* predecessor, UErrorCode& status); |
| 93 | |
| 94 | int16_t expectedExponent() const; |
| 95 | int32_t indexOfAnyRulePrefix() const; |
| 96 | double matchToDelimiter(const UnicodeString& text, int32_t startPos, double baseValue, |
| 97 | const UnicodeString& delimiter, ParsePosition& pp, const NFSubstitution* sub, |
| 98 | uint32_t nonNumericalExecutedRuleMask, |
| 99 | double upperBound) const; |
| 100 | void stripPrefix(UnicodeString& text, const UnicodeString& prefix, ParsePosition& pp) const; |
| 101 | |
| 102 | int32_t prefixLength(const UnicodeString& str, const UnicodeString& prefix, UErrorCode& status) const; |
| 103 | UBool allIgnorable(const UnicodeString& str, UErrorCode& status) const; |
| 104 | int32_t findText(const UnicodeString& str, const UnicodeString& key, |
| 105 | int32_t startingAt, int32_t* resultCount) const; |
| 106 | |
| 107 | private: |
| 108 | int64_t baseValue; |
| 109 | int32_t radix; |
| 110 | int16_t exponent; |
| 111 | UChar decimalPoint; |
| 112 | UnicodeString fRuleText; |
| 113 | NFSubstitution* sub1; |
| 114 | NFSubstitution* sub2; |
| 115 | const RuleBasedNumberFormat* formatter; |
| 116 | const PluralFormat* rulePatternFormat; |
| 117 | |
| 118 | NFRule(const NFRule &other); // forbid copying of this class |
| 119 | NFRule &operator=(const NFRule &other); // forbid copying of this class |
| 120 | }; |
| 121 | |
| 122 | U_NAMESPACE_END |
| 123 | |
| 124 | /* U_HAVE_RBNF */ |
| 125 | #endif |
| 126 | |
| 127 | // NFRULE_H |
| 128 | #endif |
| 129 | |