1 // © 2016 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 /*
4 *******************************************************************************
5 *
6 * Copyright (C) 1997-2012, International Business Machines
7 * Corporation and others. All Rights Reserved.
8 *
9 *******************************************************************************
10 * file name: loclikely.cpp
11 * encoding: UTF-8
12 * tab size: 8 (not used)
13 * indentation:4
14 *
15 * created on: 2010feb25
16 * created by: Markus W. Scherer
17 *
18 * Code for miscellaneous locale-related resource bundle data access,
19 * separated out from other .cpp files
20 * that then do not depend on resource bundle code and this data.
21 */
22
23 #include "unicode/utypes.h"
24 #include "unicode/putil.h"
25 #include "unicode/uloc.h"
26 #include "unicode/ures.h"
27 #include "charstr.h"
28 #include "cstring.h"
29 #include "ulocimp.h"
30 #include "uresimp.h"
31
32 /*
33 * Lookup a resource bundle table item with fallback on the table level.
34 * Regular resource bundle lookups perform fallback to parent locale bundles
35 * and eventually the root bundle, but only for top-level items.
36 * This function takes the name of a top-level table and of an item in that table
37 * and performs a lookup of both, falling back until a bundle contains a table
38 * with this item.
39 *
40 * Note: Only the opening of entire bundles falls back through the default locale
41 * before root. Once a bundle is open, item lookups do not go through the
42 * default locale because that would result in a mix of languages that is
43 * unpredictable to the programmer and most likely useless.
44 */
45 U_CAPI const char16_t * U_EXPORT2
uloc_getTableStringWithFallback(const char * path,const char * locale,const char * tableKey,const char * subTableKey,const char * itemKey,int32_t * pLength,UErrorCode * pErrorCode)46 uloc_getTableStringWithFallback(const char *path, const char *locale,
47 const char *tableKey, const char *subTableKey,
48 const char *itemKey,
49 int32_t *pLength,
50 UErrorCode *pErrorCode)
51 {
52 if (U_FAILURE(*pErrorCode)) { return nullptr; }
53 /* char localeBuffer[ULOC_FULLNAME_CAPACITY*4];*/
54 const char16_t *item=nullptr;
55 UErrorCode errorCode;
56
57 /*
58 * open the bundle for the current locale
59 * this falls back through the locale's chain to root
60 */
61 errorCode=U_ZERO_ERROR;
62 icu::LocalUResourceBundlePointer rb(ures_open(path, locale, &errorCode));
63
64 if(U_FAILURE(errorCode)) {
65 /* total failure, not even root could be opened */
66 *pErrorCode=errorCode;
67 return nullptr;
68 } else if(errorCode==U_USING_DEFAULT_WARNING ||
69 (errorCode==U_USING_FALLBACK_WARNING && *pErrorCode!=U_USING_DEFAULT_WARNING)
70 ) {
71 /* set the "strongest" error code (success->fallback->default->failure) */
72 *pErrorCode=errorCode;
73 }
74
75 for(;;){
76 icu::StackUResourceBundle table;
77 icu::StackUResourceBundle subTable;
78 ures_getByKeyWithFallback(rb.getAlias(), tableKey, table.getAlias(), &errorCode);
79
80 if (subTableKey != nullptr) {
81 /*
82 ures_getByKeyWithFallback(table.getAlias(), subTableKey, subTable.getAlias(), &errorCode);
83 item = ures_getStringByKeyWithFallback(subTable.getAlias(), itemKey, pLength, &errorCode);
84 if(U_FAILURE(errorCode)){
85 *pErrorCode = errorCode;
86 }
87
88 break;*/
89
90 ures_getByKeyWithFallback(table.getAlias(), subTableKey, table.getAlias(), &errorCode);
91 }
92 if(U_SUCCESS(errorCode)){
93 item = ures_getStringByKeyWithFallback(table.getAlias(), itemKey, pLength, &errorCode);
94 if(U_FAILURE(errorCode)){
95 const char* replacement = nullptr;
96 *pErrorCode = errorCode; /*save the errorCode*/
97 errorCode = U_ZERO_ERROR;
98 /* may be a deprecated code */
99 if(uprv_strcmp(tableKey, "Countries")==0){
100 replacement = uloc_getCurrentCountryID(itemKey);
101 }else if(uprv_strcmp(tableKey, "Languages")==0){
102 replacement = uloc_getCurrentLanguageID(itemKey);
103 }
104 /*pointer comparison is ok since uloc_getCurrentCountryID & uloc_getCurrentLanguageID return the key itself is replacement is not found*/
105 if(replacement!=nullptr && itemKey != replacement){
106 item = ures_getStringByKeyWithFallback(table.getAlias(), replacement, pLength, &errorCode);
107 if(U_SUCCESS(errorCode)){
108 *pErrorCode = errorCode;
109 break;
110 }
111 }
112 }else{
113 break;
114 }
115 }
116
117 if(U_FAILURE(errorCode)){
118
119 /* still can't figure out ?.. try the fallback mechanism */
120 int32_t len = 0;
121 const char16_t* fallbackLocale = nullptr;
122 *pErrorCode = errorCode;
123 errorCode = U_ZERO_ERROR;
124
125 fallbackLocale = ures_getStringByKeyWithFallback(table.getAlias(), "Fallback", &len, &errorCode);
126 if(U_FAILURE(errorCode)){
127 *pErrorCode = errorCode;
128 break;
129 }
130
131 icu::CharString explicitFallbackName;
132 explicitFallbackName.appendInvariantChars(fallbackLocale, len, errorCode);
133
134 /* guard against recursive fallback */
135 if (explicitFallbackName == locale) {
136 *pErrorCode = U_INTERNAL_PROGRAM_ERROR;
137 break;
138 }
139 rb.adoptInstead(ures_open(path, explicitFallbackName.data(), &errorCode));
140 if(U_FAILURE(errorCode)){
141 *pErrorCode = errorCode;
142 break;
143 }
144 /* succeeded in opening the fallback bundle .. continue and try to fetch the item */
145 }else{
146 break;
147 }
148 }
149
150 return item;
151 }
152
153 namespace {
154
155 ULayoutType
_uloc_getOrientationHelper(const char * localeId,const char * key,UErrorCode & status)156 _uloc_getOrientationHelper(const char* localeId,
157 const char* key,
158 UErrorCode& status)
159 {
160 ULayoutType result = ULOC_LAYOUT_UNKNOWN;
161
162 if (U_FAILURE(status)) { return result; }
163
164 icu::CharString localeBuffer = ulocimp_canonicalize(localeId, status);
165
166 if (U_FAILURE(status)) { return result; }
167
168 int32_t length = 0;
169 const char16_t* const value =
170 uloc_getTableStringWithFallback(
171 nullptr,
172 localeBuffer.data(),
173 "layout",
174 nullptr,
175 key,
176 &length,
177 &status);
178
179 if (U_FAILURE(status)) { return result; }
180
181 if (length != 0) {
182 switch(value[0])
183 {
184 case 0x0062: /* 'b' */
185 result = ULOC_LAYOUT_BTT;
186 break;
187 case 0x006C: /* 'l' */
188 result = ULOC_LAYOUT_LTR;
189 break;
190 case 0x0072: /* 'r' */
191 result = ULOC_LAYOUT_RTL;
192 break;
193 case 0x0074: /* 't' */
194 result = ULOC_LAYOUT_TTB;
195 break;
196 default:
197 status = U_INTERNAL_PROGRAM_ERROR;
198 break;
199 }
200 }
201
202 return result;
203 }
204
205 } // namespace
206
207 U_CAPI ULayoutType U_EXPORT2
uloc_getCharacterOrientation(const char * localeId,UErrorCode * status)208 uloc_getCharacterOrientation(const char* localeId,
209 UErrorCode *status)
210 {
211 return _uloc_getOrientationHelper(localeId, "characters", *status);
212 }
213
214 /**
215 * Get the layout line orientation for the specified locale.
216 *
217 * @param localeID locale name
218 * @param status Error status
219 * @return an enum indicating the layout orientation for lines.
220 */
221 U_CAPI ULayoutType U_EXPORT2
uloc_getLineOrientation(const char * localeId,UErrorCode * status)222 uloc_getLineOrientation(const char* localeId,
223 UErrorCode *status)
224 {
225 return _uloc_getOrientationHelper(localeId, "lines", *status);
226 }
227