icuSources/i18n/nfrule.h

   1 /*
   2 *******************************************************************************
   3 * Copyright (C) 1997-2014, 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         kOtherRule = -5
  42     };
  43
  44     static void makeRules(UnicodeString& definition,
  45                           const NFRuleSet* ruleSet,
  46                           const NFRule* predecessor,
  47                           const RuleBasedNumberFormat* rbnf,
  48                           NFRuleList& ruleList,
  49                           UErrorCode& status);
  50
  51     NFRule(const RuleBasedNumberFormat* rbnf);
  52     ~NFRule();
  53
  54     UBool operator==(const NFRule& rhs) const;
  55     UBool operator!=(const NFRule& rhs) const { return !operator==(rhs); }
  56
  57     ERuleType getType() const { return (ERuleType)(baseValue <= kNoBase ? (ERuleType)baseValue : kOtherRule); }
  58     void setType(ERuleType ruleType) { baseValue = (int32_t)ruleType; }
  59
  60     int64_t getBaseValue() const { return baseValue; }
  61     void setBaseValue(int64_t value, UErrorCode& status);
  62
  63     double getDivisor() const { return uprv_pow(radix, exponent); }
  64
  65     void doFormat(int64_t number, UnicodeString& toAppendTo, int32_t pos, UErrorCode& status) const;
  66     void doFormat(double  number, UnicodeString& toAppendTo, int32_t pos, UErrorCode& status) const;
  67
  68     UBool doParse(const UnicodeString& text,
  69                   ParsePosition& pos,
  70                   UBool isFractional,
  71                   double upperBound,
  72                   Formattable& result,
  73                   UBool isDecimFmtParseable=TRUE) const;
  74
  75     UBool shouldRollBack(double number) const;
  76
  77     void _appendRuleText(UnicodeString& result) const;
  78
  79     int32_t findTextLenient(const UnicodeString& str, const UnicodeString& key,
  80                      int32_t startingAt, int32_t* resultCount) const;
  81
  82 private:
  83     void parseRuleDescriptor(UnicodeString& descriptor, UErrorCode& status);
  84     void extractSubstitutions(const NFRuleSet* ruleSet, const UnicodeString &ruleText, const NFRule* predecessor, UErrorCode& status);
  85     NFSubstitution* extractSubstitution(const NFRuleSet* ruleSet, const NFRule* predecessor, UErrorCode& status);
  86
  87     int16_t expectedExponent() const;
  88     int32_t indexOfAny(const UChar* const strings[]) const;
  89     double matchToDelimiter(const UnicodeString& text, int32_t startPos, double baseValue,
  90                             const UnicodeString& delimiter, ParsePosition& pp, const NFSubstitution* sub,
  91                             double upperBound) const;
  92     void stripPrefix(UnicodeString& text, const UnicodeString& prefix, ParsePosition& pp) const;
  93
  94     int32_t prefixLength(const UnicodeString& str, const UnicodeString& prefix, UErrorCode& status) const;
  95     UBool allIgnorable(const UnicodeString& str, UErrorCode& status) const;
  96     int32_t findText(const UnicodeString& str, const UnicodeString& key,
  97                      int32_t startingAt, int32_t* resultCount) const;
  98
  99 private:
 100     int64_t baseValue;
 101     int32_t radix;
 102     int16_t exponent;
 103     UnicodeString ruleText;
 104     NFSubstitution* sub1;
 105     NFSubstitution* sub2;
 106     const RuleBasedNumberFormat* formatter;
 107     const PluralFormat* rulePatternFormat;
 108
 109     NFRule(const NFRule &other); // forbid copying of this class
 110     NFRule &operator=(const NFRule &other); // forbid copying of this class
 111 };
 112
 113 U_NAMESPACE_END
 114
 115 /* U_HAVE_RBNF */
 116 #endif
 117
 118 // NFRULE_H
 119 #endif
 120