icuSources/i18n/nfrule.h

   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
  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,
  79                   UBool isDecimFmtParseable=TRUE) const;
  80
  81     UBool shouldRollBack(int64_t number) const;
  82
  83     void _appendRuleText(UnicodeString& result) const;
  84
  85     int32_t findTextLenient(const UnicodeString& str, const UnicodeString& key,
  86                      int32_t startingAt, int32_t* resultCount) const;
  87
  88     void setDecimalFormatSymbols(const DecimalFormatSymbols &newSymbols, UErrorCode& status);
  89
  90 private:
  91     void parseRuleDescriptor(UnicodeString& descriptor, UErrorCode& status);
  92     void extractSubstitutions(const NFRuleSet* ruleSet, const UnicodeString &ruleText, const NFRule* predecessor, UErrorCode& status);
  93     NFSubstitution* extractSubstitution(const NFRuleSet* ruleSet, const NFRule* predecessor, UErrorCode& status);
  94
  95     int16_t expectedExponent() const;
  96     int32_t indexOfAnyRulePrefix() const;
  97     double matchToDelimiter(const UnicodeString& text, int32_t startPos, double baseValue,
  98                             const UnicodeString& delimiter, ParsePosition& pp, const NFSubstitution* sub,
  99                             uint32_t nonNumericalExecutedRuleMask,
 100                             double upperBound) const;
 101     void stripPrefix(UnicodeString& text, const UnicodeString& prefix, ParsePosition& pp) const;
 102
 103     int32_t prefixLength(const UnicodeString& str, const UnicodeString& prefix, UErrorCode& status) const;
 104     UBool allIgnorable(const UnicodeString& str, UErrorCode& status) const;
 105     int32_t findText(const UnicodeString& str, const UnicodeString& key,
 106                      int32_t startingAt, int32_t* resultCount) const;
 107
 108 private:
 109     int64_t baseValue;
 110     int32_t radix;
 111     int16_t exponent;
 112     UChar decimalPoint;
 113     UnicodeString fRuleText;
 114     NFSubstitution* sub1;
 115     NFSubstitution* sub2;
 116     const RuleBasedNumberFormat* formatter;
 117     const PluralFormat* rulePatternFormat;
 118
 119     NFRule(const NFRule &other); // forbid copying of this class
 120     NFRule &operator=(const NFRule &other); // forbid copying of this class
 121 };
 122
 123 U_NAMESPACE_END
 124
 125 /* U_HAVE_RBNF */
 126 #endif
 127
 128 // NFRULE_H
 129 #endif
 130