lsr.h (2560B)
1 // © 2019 and later: Unicode, Inc. and others. 2 // License & terms of use: http://www.unicode.org/copyright.html 3 4 // lsr.h 5 // created: 2019may08 Markus W. Scherer 6 7 #ifndef __LSR_H__ 8 #define __LSR_H__ 9 10 #include "unicode/stringpiece.h" 11 #include "unicode/utypes.h" 12 #include "unicode/uobject.h" 13 #include "cstring.h" 14 15 U_NAMESPACE_BEGIN 16 17 struct LSR final : public UMemory { 18 static constexpr int32_t REGION_INDEX_LIMIT = 1001 + 26 * 26; 19 20 static constexpr int32_t EXPLICIT_LSR = 7; 21 static constexpr int32_t EXPLICIT_LANGUAGE = 4; 22 static constexpr int32_t EXPLICIT_SCRIPT = 2; 23 static constexpr int32_t EXPLICIT_REGION = 1; 24 static constexpr int32_t IMPLICIT_LSR = 0; 25 static constexpr int32_t DONT_CARE_FLAGS = 0; 26 27 const char *language; 28 const char *script; 29 const char *region; 30 char *owned = nullptr; 31 /** Index for region, 0 if ill-formed. @see indexForRegion */ 32 int32_t regionIndex = 0; 33 int32_t flags = 0; 34 /** Only set for LSRs that will be used in a hash table. */ 35 int32_t hashCode = 0; 36 37 LSR() : language("und"), script(""), region("") {} 38 39 /** Constructor which aliases all subtag pointers. */ 40 LSR(const char *lang, const char *scr, const char *r, int32_t f) : 41 language(lang), script(scr), region(r), 42 regionIndex(indexForRegion(region)), flags(f) {} 43 /** 44 * Constructor which prepends the prefix to the language and script, 45 * copies those into owned memory, and aliases the region. 46 */ 47 LSR(char prefix, const char *lang, const char *scr, const char *r, int32_t f, 48 UErrorCode &errorCode); 49 LSR(StringPiece lang, StringPiece scr, StringPiece r, int32_t f, 50 UErrorCode &errorCode); 51 LSR(LSR &&other) noexcept; 52 LSR(const LSR &other) = delete; 53 inline ~LSR() { 54 // Pure inline code for almost all instances. 55 if (owned != nullptr) { 56 deleteOwned(); 57 } 58 } 59 60 LSR &operator=(LSR &&other) noexcept; 61 LSR &operator=(const LSR &other) = delete; 62 63 /** 64 * Returns a positive index (>0) for a well-formed region code. 65 * Do not rely on a particular region->index mapping; it may change. 66 * Returns 0 for ill-formed strings. 67 */ 68 static int32_t indexForRegion(const char *region); 69 70 UBool isEquivalentTo(const LSR &other) const; 71 bool operator==(const LSR &other) const; 72 73 inline bool operator!=(const LSR &other) const { 74 return !operator==(other); 75 } 76 77 LSR &setHashCode(); 78 79 private: 80 void deleteOwned(); 81 }; 82 83 U_NAMESPACE_END 84 85 #endif // __LSR_H__