1 // Copyright (C) 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: US-ASCII
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 "cstring.h"
28 #include "ulocimp.h"
29 #include "uresimp.h"
30
31 /*
32 * Lookup a resource bundle table item with fallback on the table level.
33 * Regular resource bundle lookups perform fallback to parent locale bundles
34 * and eventually the root bundle, but only for top-level items.
35 * This function takes the name of a top-level table and of an item in that table
36 * and performs a lookup of both, falling back until a bundle contains a table
37 * with this item.
38 *
39 * Note: Only the opening of entire bundles falls back through the default locale
40 * before root. Once a bundle is open, item lookups do not go through the
41 * default locale because that would result in a mix of languages that is
42 * unpredictable to the programmer and most likely useless.
43 */
44 U_CAPI const UChar * U_EXPORT2
uloc_getTableStringWithFallback(const char * path,const char * locale,const char * tableKey,const char * subTableKey,const char * itemKey,int32_t * pLength,UErrorCode * pErrorCode)45 uloc_getTableStringWithFallback(const char *path, const char *locale,
46 const char *tableKey, const char *subTableKey,
47 const char *itemKey,
48 int32_t *pLength,
49 UErrorCode *pErrorCode)
50 {
51 /* char localeBuffer[ULOC_FULLNAME_CAPACITY*4];*/
52 UResourceBundle *rb=NULL, table, subTable;
53 const UChar *item=NULL;
54 UErrorCode errorCode;
55 char explicitFallbackName[ULOC_FULLNAME_CAPACITY] = {0};
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 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 NULL;
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 ures_initStackObject(&table);
77 ures_initStackObject(&subTable);
78 ures_getByKeyWithFallback(rb, tableKey, &table, &errorCode);
79
80 if (subTableKey != NULL) {
81 /*
82 ures_getByKeyWithFallback(&table,subTableKey, &subTable, &errorCode);
83 item = ures_getStringByKeyWithFallback(&subTable, itemKey, pLength, &errorCode);
84 if(U_FAILURE(errorCode)){
85 *pErrorCode = errorCode;
86 }
87
88 break;*/
89
90 ures_getByKeyWithFallback(&table,subTableKey, &table, &errorCode);
91 }
92 if(U_SUCCESS(errorCode)){
93 item = ures_getStringByKeyWithFallback(&table, itemKey, pLength, &errorCode);
94 if(U_FAILURE(errorCode)){
95 const char* replacement = NULL;
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!=NULL && itemKey != replacement){
106 item = ures_getStringByKeyWithFallback(&table, 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 UChar* fallbackLocale = NULL;
122 *pErrorCode = errorCode;
123 errorCode = U_ZERO_ERROR;
124
125 fallbackLocale = ures_getStringByKeyWithFallback(&table, "Fallback", &len, &errorCode);
126 if(U_FAILURE(errorCode)){
127 *pErrorCode = errorCode;
128 break;
129 }
130
131 u_UCharsToChars(fallbackLocale, explicitFallbackName, len);
132
133 /* guard against recursive fallback */
134 if(uprv_strcmp(explicitFallbackName, locale)==0){
135 *pErrorCode = U_INTERNAL_PROGRAM_ERROR;
136 break;
137 }
138 ures_close(rb);
139 rb = ures_open(path, explicitFallbackName, &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 /* done with the locale string - ready to close table and rb */
150 ures_close(&subTable);
151 ures_close(&table);
152 ures_close(rb);
153 return item;
154 }
155
156 static ULayoutType
_uloc_getOrientationHelper(const char * localeId,const char * key,UErrorCode * status)157 _uloc_getOrientationHelper(const char* localeId,
158 const char* key,
159 UErrorCode *status)
160 {
161 ULayoutType result = ULOC_LAYOUT_UNKNOWN;
162
163 if (!U_FAILURE(*status)) {
164 int32_t length = 0;
165 char localeBuffer[ULOC_FULLNAME_CAPACITY];
166
167 uloc_canonicalize(localeId, localeBuffer, sizeof(localeBuffer), status);
168
169 if (!U_FAILURE(*status)) {
170 const UChar* const value =
171 uloc_getTableStringWithFallback(
172 NULL,
173 localeBuffer,
174 "layout",
175 NULL,
176 key,
177 &length,
178 status);
179
180 if (!U_FAILURE(*status) && length != 0) {
181 switch(value[0])
182 {
183 case 0x0062: /* 'b' */
184 result = ULOC_LAYOUT_BTT;
185 break;
186 case 0x006C: /* 'l' */
187 result = ULOC_LAYOUT_LTR;
188 break;
189 case 0x0072: /* 'r' */
190 result = ULOC_LAYOUT_RTL;
191 break;
192 case 0x0074: /* 't' */
193 result = ULOC_LAYOUT_TTB;
194 break;
195 default:
196 *status = U_INTERNAL_PROGRAM_ERROR;
197 break;
198 }
199 }
200 }
201 }
202
203 return result;
204 }
205
206 U_CAPI ULayoutType U_EXPORT2
uloc_getCharacterOrientation(const char * localeId,UErrorCode * status)207 uloc_getCharacterOrientation(const char* localeId,
208 UErrorCode *status)
209 {
210 return _uloc_getOrientationHelper(localeId, "characters", status);
211 }
212
213 /**
214 * Get the layout line orientation for the specified locale.
215 *
216 * @param localeID locale name
217 * @param status Error status
218 * @return an enum indicating the layout orientation for lines.
219 */
220 U_CAPI ULayoutType U_EXPORT2
uloc_getLineOrientation(const char * localeId,UErrorCode * status)221 uloc_getLineOrientation(const char* localeId,
222 UErrorCode *status)
223 {
224 return _uloc_getOrientationHelper(localeId, "lines", status);
225 }
226