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
21U_NAMESPACE_BEGIN
22
23class FieldPosition;
24class Formattable;
25class NFRuleList;
26class NFRuleSet;
27class NFSubstitution;
28class ParsePosition;
29class PluralFormat;
30class RuleBasedNumberFormat;
31class UnicodeString;
32
33class NFRule : public UMemory {
34public:
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) const;
79
80 UBool shouldRollBack(int64_t number) const;
81
82 void _appendRuleText(UnicodeString& result) const;
83
84 int32_t findTextLenient(const UnicodeString& str, const UnicodeString& key,
85 int32_t startingAt, int32_t* resultCount) const;
86
87 void setDecimalFormatSymbols(const DecimalFormatSymbols &newSymbols, UErrorCode& status);
88
89private:
90 void parseRuleDescriptor(UnicodeString& descriptor, UErrorCode& status);
91 void extractSubstitutions(const NFRuleSet* ruleSet, const UnicodeString &ruleText, const NFRule* predecessor, UErrorCode& status);
92 NFSubstitution* extractSubstitution(const NFRuleSet* ruleSet, const NFRule* predecessor, UErrorCode& status);
93
94 int16_t expectedExponent() const;
95 int32_t indexOfAnyRulePrefix() const;
96 double matchToDelimiter(const UnicodeString& text, int32_t startPos, double baseValue,
97 const UnicodeString& delimiter, ParsePosition& pp, const NFSubstitution* sub,
98 uint32_t nonNumericalExecutedRuleMask,
99 double upperBound) const;
100 void stripPrefix(UnicodeString& text, const UnicodeString& prefix, ParsePosition& pp) const;
101
102 int32_t prefixLength(const UnicodeString& str, const UnicodeString& prefix, UErrorCode& status) const;
103 UBool allIgnorable(const UnicodeString& str, UErrorCode& status) const;
104 int32_t findText(const UnicodeString& str, const UnicodeString& key,
105 int32_t startingAt, int32_t* resultCount) const;
106
107private:
108 int64_t baseValue;
109 int32_t radix;
110 int16_t exponent;
111 UChar decimalPoint;
112 UnicodeString fRuleText;
113 NFSubstitution* sub1;
114 NFSubstitution* sub2;
115 const RuleBasedNumberFormat* formatter;
116 const PluralFormat* rulePatternFormat;
117
118 NFRule(const NFRule &other); // forbid copying of this class
119 NFRule &operator=(const NFRule &other); // forbid copying of this class
120};
121
122U_NAMESPACE_END
123
124/* U_HAVE_RBNF */
125#endif
126
127// NFRULE_H
128#endif
129
130