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
105