1 // © 2018 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 
4 #include "unicode/utypes.h"
5 
6 #if !UCONFIG_NO_FORMATTING
7 #ifndef __NUMPARSE_DECIMAL_H__
8 #define __NUMPARSE_DECIMAL_H__
9 
10 #include "unicode/uniset.h"
11 #include "numparse_types.h"
12 
13 U_NAMESPACE_BEGIN namespace numparse {
14 namespace impl {
15 
16 using ::icu::number::impl::Grouper;
17 
18 class DecimalMatcher : public NumberParseMatcher, public UMemory {
19   public:
20     DecimalMatcher() = default;  // WARNING: Leaves the object in an unusable state
21 
22     DecimalMatcher(const DecimalFormatSymbols& symbols, const Grouper& grouper,
23                    parse_flags_t parseFlags);
24 
25     bool match(StringSegment& segment, ParsedNumber& result, UErrorCode& status) const override;
26 
27     bool
28     match(StringSegment& segment, ParsedNumber& result, int8_t exponentSign, UErrorCode& status) const;
29 
30     bool smokeTest(const StringSegment& segment) const override;
31 
32     UnicodeString toString() const override;
33 
34   private:
35     /** If true, only accept strings whose grouping sizes match the locale */
36     bool requireGroupingMatch;
37 
38     /** If true, do not accept grouping separators at all */
39     bool groupingDisabled;
40 
41     // Fraction grouping parsing is disabled for now but could be enabled later.
42     // See http://bugs.icu-project.org/trac/ticket/10794
43     // bool fractionGrouping;
44 
45     /** If true, do not accept numbers in the fraction */
46     bool integerOnly;
47 
48     int16_t grouping1;
49     int16_t grouping2;
50 
51     UnicodeString groupingSeparator;
52     UnicodeString decimalSeparator;
53 
54     // Assumption: these sets all consist of single code points. If this assumption needs to be broken,
55     // fix getLeadCodePoints() as well as matching logic. Be careful of the performance impact.
56     const UnicodeSet* groupingUniSet;
57     const UnicodeSet* decimalUniSet;
58     const UnicodeSet* separatorSet;
59     const UnicodeSet* leadSet;
60 
61     // Make this class the owner of a few objects that could be allocated.
62     // The first three LocalPointers are used for assigning ownership only.
63     LocalPointer<const UnicodeSet> fLocalDecimalUniSet;
64     LocalPointer<const UnicodeSet> fLocalSeparatorSet;
65     LocalArray<const UnicodeString> fLocalDigitStrings;
66 
67     bool validateGroup(int32_t sepType, int32_t count, bool isPrimary) const;
68 };
69 
70 
71 } // namespace impl
72 } // namespace numparse
73 U_NAMESPACE_END
74 
75 #endif //__NUMPARSE_DECIMAL_H__
76 #endif /* #if !UCONFIG_NO_FORMATTING */
77