ICU-531.30.tar.gz

[apple/icu.git] / icuSources / i18n / collationroot.cpp

diff --git a/icuSources/i18n/collationroot.cpp b/icuSources/i18n/collationroot.cpp
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+++ b/icuSources/i18n/collationroot.cpp
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+/*
+*******************************************************************************
+* Copyright (C) 2012-2014, International Business Machines
+* Corporation and others.  All Rights Reserved.
+*******************************************************************************
+* collationroot.cpp
+*
+* created on: 2012dec17
+* created by: Markus W. Scherer
+*/
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_COLLATION
+
+#include "unicode/coll.h"
+#include "unicode/udata.h"
+#include "collation.h"
+#include "collationdata.h"
+#include "collationdatareader.h"
+#include "collationroot.h"
+#include "collationsettings.h"
+#include "collationtailoring.h"
+#include "normalizer2impl.h"
+#include "ucln_in.h"
+#include "udatamem.h"
+#include "umutex.h"
+
+U_NAMESPACE_BEGIN
+
+namespace {
+
+static const CollationTailoring *rootSingleton = NULL;
+static UInitOnce initOnce = U_INITONCE_INITIALIZER;
+
+}  // namespace
+
+U_CDECL_BEGIN
+
+static UBool U_CALLCONV uprv_collation_root_cleanup() {
+    SharedObject::clearPtr(rootSingleton);
+    initOnce.reset();
+    return TRUE;
+}
+
+U_CDECL_END
+
+void
+CollationRoot::load(UErrorCode &errorCode) {
+    if(U_FAILURE(errorCode)) { return; }
+    LocalPointer<CollationTailoring> t(new CollationTailoring(NULL));
+    if(t.isNull() || t->isBogus()) {
+        errorCode = U_MEMORY_ALLOCATION_ERROR;
+        return;
+    }
+    t->memory = udata_openChoice(U_ICUDATA_NAME U_TREE_SEPARATOR_STRING "coll",
+                                 "icu", "ucadata",
+                                 CollationDataReader::isAcceptable, t->version, &errorCode);
+    if(U_FAILURE(errorCode)) { return; }
+    const uint8_t *inBytes = static_cast<const uint8_t *>(udata_getMemory(t->memory));
+    CollationDataReader::read(NULL, inBytes, udata_getLength(t->memory), *t, errorCode);
+    if(U_FAILURE(errorCode)) { return; }
+    ucln_i18n_registerCleanup(UCLN_I18N_COLLATION_ROOT, uprv_collation_root_cleanup);
+    t->addRef();  // The rootSingleton takes ownership.
+    rootSingleton = t.orphan();
+}
+
+const CollationTailoring *
+CollationRoot::getRoot(UErrorCode &errorCode) {
+    umtx_initOnce(initOnce, CollationRoot::load, errorCode);
+    if(U_FAILURE(errorCode)) { return NULL; }
+    return rootSingleton;
+}
+
+const CollationData *
+CollationRoot::getData(UErrorCode &errorCode) {
+    const CollationTailoring *root = getRoot(errorCode);
+    if(U_FAILURE(errorCode)) { return NULL; }
+    return root->data;
+}
+
+const CollationSettings *
+CollationRoot::getSettings(UErrorCode &errorCode) {
+    const CollationTailoring *root = getRoot(errorCode);
+    if(U_FAILURE(errorCode)) { return NULL; }
+    return root->settings;
+}
+
+U_NAMESPACE_END
+
+#endif  // !UCONFIG_NO_COLLATION