1 // © 2018 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 
4 #ifndef __PLURALRANGES_H__
5 #define __PLURALRANGES_H__
6 
7 #include "unicode/utypes.h"
8 
9 #if !UCONFIG_NO_FORMATTING
10 
11 #include "unicode/uobject.h"
12 #include "unicode/locid.h"
13 #include "unicode/plurrule.h"
14 #include "standardplural.h"
15 #include "cmemory.h"
16 
17 U_NAMESPACE_BEGIN
18 
19 // Forward declarations
20 namespace number {
21 namespace impl {
22 class UFormattedNumberRangeData;
23 }
24 }
25 
26 class StandardPluralRanges : public UMemory {
27   public:
28     /** Create a new StandardPluralRanges for the given locale */
29     static StandardPluralRanges forLocale(const Locale& locale, UErrorCode& status);
30 
31     /** Explicit copy constructor */
32     StandardPluralRanges copy(UErrorCode& status) const;
33 
34     /** Create an object (called on an rvalue) */
35     LocalPointer<StandardPluralRanges> toPointer(UErrorCode& status) && noexcept;
36 
37     /** Select rule based on the first and second forms */
38     StandardPlural::Form resolve(StandardPlural::Form first, StandardPlural::Form second) const;
39 
40     /** Used for data loading. */
41     void addPluralRange(
42         StandardPlural::Form first,
43         StandardPlural::Form second,
44         StandardPlural::Form result);
45 
46     /** Used for data loading. */
47     void setCapacity(int32_t length, UErrorCode& status);
48 
49   private:
50     struct StandardPluralRangeTriple {
51         StandardPlural::Form first;
52         StandardPlural::Form second;
53         StandardPlural::Form result;
54     };
55 
56     // TODO: An array is simple here, but it results in linear lookup time.
57     // Certain locales have 20-30 entries in this list.
58     // Consider changing to a smarter data structure.
59     typedef MaybeStackArray<StandardPluralRangeTriple, 3> PluralRangeTriples;
60     PluralRangeTriples fTriples;
61     int32_t fTriplesLen = 0;
62 };
63 
64 U_NAMESPACE_END
65 
66 #endif /* #if !UCONFIG_NO_FORMATTING */
67 #endif //__PLURALRANGES_H__
68