Check in the pristine copy of ICU 4.6...

icu46/source/i18n/nfrule.h

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