icuSources/i18n/collationroot.cpp

   1 // © 2016 and later: Unicode, Inc. and others.
   2 // License & terms of use: http://www.unicode.org/copyright.html
   3 /*
   4 *******************************************************************************
   5 * Copyright (C) 2012-2014, International Business Machines
   6 * Corporation and others.  All Rights Reserved.
   7 *******************************************************************************
   8 * collationroot.cpp
   9 *
  10 * created on: 2012dec17
  11 * created by: Markus W. Scherer
  12 */
  13
  14 #include "unicode/utypes.h"
  15
  16 #if !UCONFIG_NO_COLLATION
  17
  18 #include "unicode/coll.h"
  19 #include "unicode/udata.h"
  20 #include "collation.h"
  21 #include "collationdata.h"
  22 #include "collationdatareader.h"
  23 #include "collationroot.h"
  24 #include "collationsettings.h"
  25 #include "collationtailoring.h"
  26 #include "normalizer2impl.h"
  27 #include "ucln_in.h"
  28 #include "udatamem.h"
  29 #include "umutex.h"
  30
  31 U_NAMESPACE_BEGIN
  32
  33 namespace {
  34
  35 static const CollationCacheEntry *rootSingleton = NULL;
  36 static UInitOnce initOnce = U_INITONCE_INITIALIZER;
  37
  38 }  // namespace
  39
  40 U_CDECL_BEGIN
  41
  42 static UBool U_CALLCONV uprv_collation_root_cleanup() {
  43     SharedObject::clearPtr(rootSingleton);
  44     initOnce.reset();
  45     return TRUE;
  46 }
  47
  48 U_CDECL_END
  49
  50 void U_CALLCONV
  51 CollationRoot::load(UErrorCode &errorCode) {
  52     if(U_FAILURE(errorCode)) { return; }
  53     LocalPointer<CollationTailoring> t(new CollationTailoring(NULL));
  54     if(t.isNull() || t->isBogus()) {
  55         errorCode = U_MEMORY_ALLOCATION_ERROR;
  56         return;
  57     }
  58     t->memory = udata_openChoice(U_ICUDATA_NAME U_TREE_SEPARATOR_STRING "coll",
  59                                  "icu", "ucadata",
  60                                  CollationDataReader::isAcceptable, t->version, &errorCode);
  61     if(U_FAILURE(errorCode)) { return; }
  62     const uint8_t *inBytes = static_cast<const uint8_t *>(udata_getMemory(t->memory));
  63     CollationDataReader::read(NULL, inBytes, udata_getLength(t->memory), *t, errorCode);
  64     if(U_FAILURE(errorCode)) { return; }
  65     ucln_i18n_registerCleanup(UCLN_I18N_COLLATION_ROOT, uprv_collation_root_cleanup);
  66     CollationCacheEntry *entry = new CollationCacheEntry(Locale::getRoot(), t.getAlias());
  67     if(entry != NULL) {
  68         t.orphan();  // The rootSingleton took ownership of the tailoring.
  69         entry->addRef();
  70         rootSingleton = entry;
  71     }
  72 }
  73
  74 const CollationCacheEntry *
  75 CollationRoot::getRootCacheEntry(UErrorCode &errorCode) {
  76     umtx_initOnce(initOnce, CollationRoot::load, errorCode);
  77     if(U_FAILURE(errorCode)) { return NULL; }
  78     return rootSingleton;
  79 }
  80
  81 const CollationTailoring *
  82 CollationRoot::getRoot(UErrorCode &errorCode) {
  83     umtx_initOnce(initOnce, CollationRoot::load, errorCode);
  84     if(U_FAILURE(errorCode)) { return NULL; }
  85     return rootSingleton->tailoring;
  86 }
  87
  88 const CollationData *
  89 CollationRoot::getData(UErrorCode &errorCode) {
  90     const CollationTailoring *root = getRoot(errorCode);
  91     if(U_FAILURE(errorCode)) { return NULL; }
  92     return root->data;
  93 }
  94
  95 const CollationSettings *
  96 CollationRoot::getSettings(UErrorCode &errorCode) {
  97     const CollationTailoring *root = getRoot(errorCode);
  98     if(U_FAILURE(errorCode)) { return NULL; }
  99     return root->settings;
 100 }
 101
 102 U_NAMESPACE_END
 103
 104 #endif  // !UCONFIG_NO_COLLATION