85 lines
2.5 KiB
C++
85 lines
2.5 KiB
C++
// © 2019 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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// lsr.h
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// created: 2019may08 Markus W. Scherer
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#ifndef __LSR_H__
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#define __LSR_H__
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#include "unicode/stringpiece.h"
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#include "unicode/utypes.h"
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#include "unicode/uobject.h"
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#include "cstring.h"
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U_NAMESPACE_BEGIN
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struct LSR final : public UMemory {
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static constexpr int32_t REGION_INDEX_LIMIT = 1001 + 26 * 26;
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static constexpr int32_t EXPLICIT_LSR = 7;
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static constexpr int32_t EXPLICIT_LANGUAGE = 4;
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static constexpr int32_t EXPLICIT_SCRIPT = 2;
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static constexpr int32_t EXPLICIT_REGION = 1;
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static constexpr int32_t IMPLICIT_LSR = 0;
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static constexpr int32_t DONT_CARE_FLAGS = 0;
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const char *language;
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const char *script;
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const char *region;
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char *owned = nullptr;
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/** Index for region, 0 if ill-formed. @see indexForRegion */
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int32_t regionIndex = 0;
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int32_t flags = 0;
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/** Only set for LSRs that will be used in a hash table. */
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int32_t hashCode = 0;
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LSR() : language("und"), script(""), region("") {}
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/** Constructor which aliases all subtag pointers. */
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LSR(const char *lang, const char *scr, const char *r, int32_t f) :
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language(lang), script(scr), region(r),
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regionIndex(indexForRegion(region)), flags(f) {}
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/**
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* Constructor which prepends the prefix to the language and script,
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* copies those into owned memory, and aliases the region.
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*/
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LSR(char prefix, const char *lang, const char *scr, const char *r, int32_t f,
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UErrorCode &errorCode);
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LSR(StringPiece lang, StringPiece scr, StringPiece r, int32_t f,
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UErrorCode &errorCode);
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LSR(LSR &&other) noexcept;
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LSR(const LSR &other) = delete;
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inline ~LSR() {
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// Pure inline code for almost all instances.
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if (owned != nullptr) {
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deleteOwned();
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}
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}
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LSR &operator=(LSR &&other) noexcept;
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LSR &operator=(const LSR &other) = delete;
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/**
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* Returns a positive index (>0) for a well-formed region code.
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* Do not rely on a particular region->index mapping; it may change.
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* Returns 0 for ill-formed strings.
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*/
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static int32_t indexForRegion(const char *region);
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UBool isEquivalentTo(const LSR &other) const;
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bool operator==(const LSR &other) const;
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inline bool operator!=(const LSR &other) const {
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return !operator==(other);
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}
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LSR &setHashCode();
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private:
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void deleteOwned();
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};
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U_NAMESPACE_END
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#endif // __LSR_H__
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