icuSources/i18n/collationroot.cpp

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