103 lines
3.4 KiB
C++
103 lines
3.4 KiB
C++
/*
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*******************************************************************************
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* Copyright (C) 1997-2001, International Business Machines Corporation and others. All Rights Reserved.
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*******************************************************************************
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*/
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#ifndef NFRULE_H
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#define NFRULE_H
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#include "unicode/utypes.h"
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#include "unicode/unistr.h"
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#include "llong.h"
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U_NAMESPACE_BEGIN
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class FieldPosition;
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class Formattable;
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class NFRuleList;
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class NFRuleSet;
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class NFSubstitution;
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class ParsePosition;
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class RuleBasedNumberFormat;
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class UnicodeString;
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class NFRule {
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public:
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enum ERuleType {
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kNoBase = 0,
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kNegativeNumberRule = -1,
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kImproperFractionRule = -2,
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kProperFractionRule = -3,
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kMasterRule = -4,
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kOtherRule = -5
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};
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static void makeRules(UnicodeString& definition,
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const NFRuleSet* ruleSet,
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const NFRule* predecessor,
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const RuleBasedNumberFormat* rbnf,
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NFRuleList& ruleList,
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UErrorCode& status);
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NFRule(const RuleBasedNumberFormat* rbnf);
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~NFRule();
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UBool operator==(const NFRule& rhs) const;
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UBool operator!=(const NFRule& rhs) const { return !operator==(rhs); }
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ERuleType getType() const { return (ERuleType)(baseValue <= 0 ? baseValue.asInt() : kOtherRule); }
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void setType(ERuleType ruleType) { baseValue = (int32_t)ruleType; }
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llong getBaseValue() const { return baseValue; }
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void setBaseValue(llong value);
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double getDivisor() const { return uprv_pow(radix, exponent); }
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void doFormat(const llong &number, UnicodeString& toAppendTo, int32_t pos) const;
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void doFormat(double number, UnicodeString& toAppendTo, int32_t pos) const;
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UBool doParse(const UnicodeString& text,
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ParsePosition& pos,
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UBool isFractional,
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double upperBound,
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Formattable& result) const;
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UBool shouldRollBack(double number) const;
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void appendRuleText(UnicodeString& result) const;
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private:
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void parseRuleDescriptor(UnicodeString& descriptor, UErrorCode& status);
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void extractSubstitutions(const NFRuleSet* ruleSet, const NFRule* predecessor, const RuleBasedNumberFormat* rbnf, UErrorCode& status);
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NFSubstitution* extractSubstitution(const NFRuleSet* ruleSet, const NFRule* predecessor, const RuleBasedNumberFormat* rbnf, UErrorCode& status);
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int16_t expectedExponent() const;
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int32_t indexOfAny(const UChar* const strings[]) const;
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double matchToDelimiter(const UnicodeString& text, int32_t startPos, double baseValue,
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const UnicodeString& delimiter, ParsePosition& pp, const NFSubstitution* sub,
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double upperBound) const;
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void stripPrefix(UnicodeString& text, const UnicodeString& prefix, ParsePosition& pp) const;
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int32_t prefixLength(const UnicodeString& str, const UnicodeString& prefix) const;
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UBool allIgnorable(const UnicodeString& str) const;
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int32_t findText(const UnicodeString& str, const UnicodeString& key,
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int32_t startingAt, int32_t* resultCount) const;
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private:
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llong baseValue;
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int16_t radix;
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int16_t exponent;
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UnicodeString ruleText;
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NFSubstitution* sub1;
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NFSubstitution* sub2;
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const RuleBasedNumberFormat* formatter;
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};
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U_NAMESPACE_END
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// NFRULE_H
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#endif
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