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collationtailoring.h (3791B)

      1 // © 2016 and later: Unicode, Inc. and others.
      2 // License & terms of use: http://www.unicode.org/copyright.html
      3 /*
      4 *******************************************************************************
      5 * Copyright (C) 2013-2014, International Business Machines
      6 * Corporation and others.  All Rights Reserved.
      7 *******************************************************************************
      8 * collationtailoring.h
      9 *
     10 * created on: 2013mar12
     11 * created by: Markus W. Scherer
     12 */
     13 
     14 #ifndef __COLLATIONTAILORING_H__
     15 #define __COLLATIONTAILORING_H__
     16 
     17 #include "unicode/utypes.h"
     18 
     19 #if !UCONFIG_NO_COLLATION
     20 
     21 #include "unicode/locid.h"
     22 #include "unicode/unistr.h"
     23 #include "unicode/uversion.h"
     24 #include "collationsettings.h"
     25 #include "uhash.h"
     26 #include "umutex.h"
     27 #include "unifiedcache.h"
     28 
     29 
     30 struct UDataMemory;
     31 struct UResourceBundle;
     32 struct UTrie2;
     33 
     34 U_NAMESPACE_BEGIN
     35 
     36 struct CollationData;
     37 
     38 class UnicodeSet;
     39 
     40 /**
     41 * Collation tailoring data & settings.
     42 * This is a container of values for a collation tailoring
     43 * built from rules or deserialized from binary data.
     44 *
     45 * It is logically immutable: Do not modify its values.
     46 * The fields are public for convenience.
     47 *
     48 * It is shared, reference-counted, and auto-deleted; see SharedObject.
     49 *
     50 * U_I18N_API because genuca & genrb use it.
     51 */
     52 struct U_I18N_API_CLASS CollationTailoring : public SharedObject {
     53    U_I18N_API CollationTailoring(const CollationSettings *baseSettings);
     54    U_I18N_API virtual ~CollationTailoring();
     55 
     56    /**
     57     * Returns true if the constructor could not initialize properly.
     58     */
     59    U_I18N_API UBool isBogus() { return settings == nullptr; }
     60 
     61    U_I18N_API UBool ensureOwnedData(UErrorCode &errorCode);
     62 
     63    U_I18N_API static void makeBaseVersion(const UVersionInfo ucaVersion, UVersionInfo version);
     64    U_I18N_API void setVersion(const UVersionInfo baseVersion, const UVersionInfo rulesVersion);
     65    U_I18N_API int32_t getUCAVersion() const;
     66 
     67    // data for sorting etc.
     68    const CollationData *data;  // == base data or ownedData
     69    const CollationSettings *settings;  // reference-counted
     70    UnicodeString rules;
     71    // The locale is bogus when built from rules or constructed from a binary blob.
     72    // It can then be set by the service registration code which is thread-safe.
     73    mutable Locale actualLocale;
     74    // UCA version u.v.w & rules version r.s.t.q:
     75    // version[0]: builder version (runtime version is mixed in at runtime)
     76    // version[1]: bits 7..3=u, bits 2..0=v
     77    // version[2]: bits 7..6=w, bits 5..0=r
     78    // version[3]= (s<<5)+(s>>3)+t+(q<<4)+(q>>4)
     79    UVersionInfo version;
     80 
     81    // owned objects
     82    CollationData *ownedData;
     83    UObject *builder;
     84    UDataMemory *memory;
     85    UResourceBundle *bundle;
     86    UTrie2 *trie;
     87    UnicodeSet *unsafeBackwardSet;
     88    mutable UHashtable *maxExpansions;
     89    mutable UInitOnce maxExpansionsInitOnce;
     90 
     91 private:
     92    /**
     93     * No copy constructor: A CollationTailoring cannot be copied.
     94     * It is immutable, and the data trie cannot be copied either.
     95     */
     96    CollationTailoring(const CollationTailoring &other) = delete;
     97 };
     98 
     99 // U_I18N_API because gencolusb uses it.
    100 struct U_I18N_API_CLASS CollationCacheEntry : public SharedObject {
    101    U_I18N_API CollationCacheEntry(const Locale &loc, const CollationTailoring *t)
    102            : validLocale(loc), tailoring(t) {
    103        if(t != nullptr) {
    104            t->addRef();
    105        }
    106    }
    107    U_I18N_API ~CollationCacheEntry();
    108 
    109    Locale validLocale;
    110    const CollationTailoring *tailoring;
    111 };
    112 
    113 template<> U_I18N_API
    114 const CollationCacheEntry *
    115 LocaleCacheKey<CollationCacheEntry>::createObject(const void *creationContext,
    116                                                  UErrorCode &errorCode) const;
    117 U_NAMESPACE_END
    118 
    119 #endif  // !UCONFIG_NO_COLLATION
    120 #endif  // __COLLATIONTAILORING_H__