michael@0: /*
michael@0: *******************************************************************************
michael@0: * Copyright (C) 1997-2008, International Business Machines
michael@0: * Corporation and others. All Rights Reserved.
michael@0: *******************************************************************************
michael@0: */
michael@0: 
michael@0: #ifndef NFRULE_H
michael@0: #define NFRULE_H
michael@0: 
michael@0: #include "unicode/rbnf.h"
michael@0: 
michael@0: #if U_HAVE_RBNF
michael@0: 
michael@0: #include "unicode/utypes.h"
michael@0: #include "unicode/uobject.h"
michael@0: #include "unicode/unistr.h"
michael@0: #include "putilimp.h"
michael@0: 
michael@0: U_NAMESPACE_BEGIN
michael@0: 
michael@0: class FieldPosition;
michael@0: class Formattable;
michael@0: class NFRuleList;
michael@0: class NFRuleSet;
michael@0: class NFSubstitution;
michael@0: class ParsePosition;
michael@0: class RuleBasedNumberFormat;
michael@0: class UnicodeString;
michael@0: 
michael@0: class NFRule : public UMemory {
michael@0: public:
michael@0: 
michael@0:     enum ERuleType {
michael@0:         kNoBase = 0,
michael@0:         kNegativeNumberRule = -1,
michael@0:         kImproperFractionRule = -2,
michael@0:         kProperFractionRule = -3,
michael@0:         kMasterRule = -4,
michael@0:         kOtherRule = -5
michael@0:     };
michael@0: 
michael@0:     static void makeRules(UnicodeString& definition,
michael@0:                           const NFRuleSet* ruleSet, 
michael@0:                           const NFRule* predecessor, 
michael@0:                           const RuleBasedNumberFormat* rbnf, 
michael@0:                           NFRuleList& ruleList,
michael@0:                           UErrorCode& status);
michael@0: 
michael@0:     NFRule(const RuleBasedNumberFormat* rbnf);
michael@0:     ~NFRule();
michael@0: 
michael@0:     UBool operator==(const NFRule& rhs) const;
michael@0:     UBool operator!=(const NFRule& rhs) const { return !operator==(rhs); }
michael@0: 
michael@0:     ERuleType getType() const { return (ERuleType)(baseValue <= kNoBase ? (ERuleType)baseValue : kOtherRule); }
michael@0:     void setType(ERuleType ruleType) { baseValue = (int32_t)ruleType; }
michael@0: 
michael@0:     int64_t getBaseValue() const { return baseValue; }
michael@0:     void setBaseValue(int64_t value, UErrorCode& status);
michael@0: 
michael@0:     double getDivisor() const { return uprv_pow(radix, exponent); }
michael@0: 
michael@0:     void doFormat(int64_t number, UnicodeString& toAppendTo, int32_t pos) const;
michael@0:     void doFormat(double  number, UnicodeString& toAppendTo, int32_t pos) const;
michael@0: 
michael@0:     UBool doParse(const UnicodeString& text, 
michael@0:                   ParsePosition& pos, 
michael@0:                   UBool isFractional, 
michael@0:                   double upperBound,
michael@0:                   Formattable& result) const;
michael@0: 
michael@0:     UBool shouldRollBack(double number) const;
michael@0: 
michael@0:     void _appendRuleText(UnicodeString& result) const;
michael@0: 
michael@0: private:
michael@0:     void parseRuleDescriptor(UnicodeString& descriptor, UErrorCode& status);
michael@0:     void extractSubstitutions(const NFRuleSet* ruleSet, const NFRule* predecessor, const RuleBasedNumberFormat* rbnf, UErrorCode& status);
michael@0:     NFSubstitution* extractSubstitution(const NFRuleSet* ruleSet, const NFRule* predecessor, const RuleBasedNumberFormat* rbnf, UErrorCode& status);
michael@0:     
michael@0:     int16_t expectedExponent() const;
michael@0:     int32_t indexOfAny(const UChar* const strings[]) const;
michael@0:     double matchToDelimiter(const UnicodeString& text, int32_t startPos, double baseValue,
michael@0:                             const UnicodeString& delimiter, ParsePosition& pp, const NFSubstitution* sub, 
michael@0:                             double upperBound) const;
michael@0:     void stripPrefix(UnicodeString& text, const UnicodeString& prefix, ParsePosition& pp) const;
michael@0: 
michael@0:     int32_t prefixLength(const UnicodeString& str, const UnicodeString& prefix, UErrorCode& status) const;
michael@0:     UBool allIgnorable(const UnicodeString& str, UErrorCode& status) const;
michael@0:     int32_t findText(const UnicodeString& str, const UnicodeString& key, 
michael@0:                      int32_t startingAt, int32_t* resultCount) const;
michael@0: 
michael@0: private:
michael@0:     int64_t baseValue;
michael@0:     int32_t radix;
michael@0:     int16_t exponent;
michael@0:     UnicodeString ruleText;
michael@0:     NFSubstitution* sub1;
michael@0:     NFSubstitution* sub2;
michael@0:     const RuleBasedNumberFormat* formatter;
michael@0: 
michael@0:     NFRule(const NFRule &other); // forbid copying of this class
michael@0:     NFRule &operator=(const NFRule &other); // forbid copying of this class
michael@0: };
michael@0: 
michael@0: U_NAMESPACE_END
michael@0: 
michael@0: /* U_HAVE_RBNF */
michael@0: #endif
michael@0: 
michael@0: // NFRULE_H
michael@0: #endif
michael@0: