1// © 2019 and later: Unicode, Inc. and others.
2// License & terms of use: http://www.unicode.org/copyright.html#License
3
4// lsr.h
5// created: 2019may08 Markus W. Scherer
6
7#ifndef __LSR_H__
8#define __LSR_H__
9
10#include "unicode/utypes.h"
11#include "unicode/uobject.h"
12#include "cstring.h"
13
14U_NAMESPACE_BEGIN
15
16struct LSR final : public UMemory {
17 static constexpr int32_t REGION_INDEX_LIMIT = 1001 + 26 * 26;
18
19 static constexpr int32_t EXPLICIT_LSR = 7;
20 static constexpr int32_t EXPLICIT_LANGUAGE = 4;
21 static constexpr int32_t EXPLICIT_SCRIPT = 2;
22 static constexpr int32_t EXPLICIT_REGION = 1;
23 static constexpr int32_t IMPLICIT_LSR = 0;
24 static constexpr int32_t DONT_CARE_FLAGS = 0;
25
26 const char *language;
27 const char *script;
28 const char *region;
29 char *owned = nullptr;
30 /** Index for region, 0 if ill-formed. @see indexForRegion */
31 int32_t regionIndex = 0;
32 int32_t flags = 0;
33 /** Only set for LSRs that will be used in a hash table. */
34 int32_t hashCode = 0;
35
36 LSR() : language("und"), script(""), region("") {}
37
38 /** Constructor which aliases all subtag pointers. */
39 LSR(const char *lang, const char *scr, const char *r, int32_t f) :
40 language(lang), script(scr), region(r),
41 regionIndex(indexForRegion(region)), flags(f) {}
42 /**
43 * Constructor which prepends the prefix to the language and script,
44 * copies those into owned memory, and aliases the region.
45 */
46 LSR(char prefix, const char *lang, const char *scr, const char *r, int32_t f,
47 UErrorCode &errorCode);
48 LSR(LSR &&other) U_NOEXCEPT;
49 LSR(const LSR &other) = delete;
50 inline ~LSR() {
51 // Pure inline code for almost all instances.
52 if (owned != nullptr) {
53 deleteOwned();
54 }
55 }
56
57 LSR &operator=(LSR &&other) U_NOEXCEPT;
58 LSR &operator=(const LSR &other) = delete;
59
60 /**
61 * Returns a positive index (>0) for a well-formed region code.
62 * Do not rely on a particular region->index mapping; it may change.
63 * Returns 0 for ill-formed strings.
64 */
65 static int32_t indexForRegion(const char *region);
66
67 UBool isEquivalentTo(const LSR &other) const;
68 UBool operator==(const LSR &other) const;
69
70 inline UBool operator!=(const LSR &other) const {
71 return !operator==(other);
72 }
73
74 LSR &setHashCode();
75
76private:
77 void deleteOwned();
78};
79
80U_NAMESPACE_END
81
82#endif // __LSR_H__
83