1 files changed, 140 insertions, 0 deletions
diff --git a/intl/icu/source/i18n/collationroot.cpp b/intl/icu/source/i18n/collationroot.cpp
new file mode 100644
index 0000000000..99686345f9
--- /dev/null
+++ b/intl/icu/source/i18n/collationroot.cpp
@@ -0,0 +1,140 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+* 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"
+#include "umapfile.h"
+
+U_NAMESPACE_BEGIN
+
+namespace {
+
+static const CollationCacheEntry *rootSingleton = nullptr;
+static UInitOnce initOnce {};
+
+}  // namespace
+
+U_CDECL_BEGIN
+
+static UBool U_CALLCONV uprv_collation_root_cleanup() {
+    SharedObject::clearPtr(rootSingleton);
+    initOnce.reset();
+    return true;
+}
+
+U_CDECL_END
+
+UDataMemory*
+CollationRoot::loadFromFile(const char* ucadataPath, UErrorCode &errorCode) {
+    UDataMemory dataMemory;
+    UDataMemory  *rDataMem = nullptr;
+    if (U_FAILURE(errorCode)) {
+        return nullptr;
+    }
+    if (uprv_mapFile(&dataMemory, ucadataPath, &errorCode)) {
+        if (dataMemory.pHeader->dataHeader.magic1 == 0xda &&
+            dataMemory.pHeader->dataHeader.magic2 == 0x27 &&
+            CollationDataReader::isAcceptable(nullptr, "icu", "ucadata", &dataMemory.pHeader->info)) {
+            rDataMem = UDataMemory_createNewInstance(&errorCode);
+            if (U_FAILURE(errorCode)) {
+                return nullptr;
+            }
+            rDataMem->pHeader = dataMemory.pHeader;
+            rDataMem->mapAddr = dataMemory.mapAddr;
+            rDataMem->map = dataMemory.map;
+            return rDataMem;
+        }
+        errorCode = U_INVALID_FORMAT_ERROR;
+        return nullptr;
+    }
+    errorCode = U_MISSING_RESOURCE_ERROR;
+    return nullptr;
+}
+
+void U_CALLCONV
+CollationRoot::load(const char* ucadataPath, UErrorCode &errorCode) {
+    if(U_FAILURE(errorCode)) { return; }
+    LocalPointer<CollationTailoring> t(new CollationTailoring(nullptr));
+    if(t.isNull() || t->isBogus()) {
+        errorCode = U_MEMORY_ALLOCATION_ERROR;
+        return;
+    }
+    t->memory = ucadataPath ? CollationRoot::loadFromFile(ucadataPath, errorCode) :
+                              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(nullptr, inBytes, udata_getLength(t->memory), *t, errorCode);
+    if(U_FAILURE(errorCode)) { return; }
+    ucln_i18n_registerCleanup(UCLN_I18N_COLLATION_ROOT, uprv_collation_root_cleanup);
+    CollationCacheEntry *entry = new CollationCacheEntry(Locale::getRoot(), t.getAlias());
+    if(entry != nullptr) {
+        t.orphan();  // The rootSingleton took ownership of the tailoring.
+        entry->addRef();
+        rootSingleton = entry;
+    }
+}
+
+const CollationCacheEntry *
+CollationRoot::getRootCacheEntry(UErrorCode &errorCode) {
+    umtx_initOnce(initOnce, CollationRoot::load, static_cast<const char*>(nullptr), errorCode);
+    if(U_FAILURE(errorCode)) { return nullptr; }
+    return rootSingleton;
+}
+
+const CollationTailoring *
+CollationRoot::getRoot(UErrorCode &errorCode) {
+    umtx_initOnce(initOnce, CollationRoot::load, static_cast<const char*>(nullptr), errorCode);
+    if(U_FAILURE(errorCode)) { return nullptr; }
+    return rootSingleton->tailoring;
+}
+
+const CollationData *
+CollationRoot::getData(UErrorCode &errorCode) {
+    const CollationTailoring *root = getRoot(errorCode);
+    if(U_FAILURE(errorCode)) { return nullptr; }
+    return root->data;
+}
+
+const CollationSettings *
+CollationRoot::getSettings(UErrorCode &errorCode) {
+    const CollationTailoring *root = getRoot(errorCode);
+    if(U_FAILURE(errorCode)) { return nullptr; }
+    return root->settings;
+}
+
+void
+CollationRoot::forceLoadFromFile(const char* ucadataPath, UErrorCode &errorCode) {
+    umtx_initOnce(initOnce, CollationRoot::load, ucadataPath, errorCode);
+}
+
+
+U_NAMESPACE_END
+
+#endif  // !UCONFIG_NO_COLLATION