icuSources/common/locresdata.cpp

   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 "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
  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
 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
 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
 221 uloc_getLineOrientation(const char* localeId,
 222                         UErrorCode *status)
 223 {
 224     return _uloc_getOrientationHelper(localeId, "lines", status);
 225 }