michael@0: /*
michael@0: *******************************************************************************
michael@0: *
michael@0: *   Copyright (C) 1997-2012, International Business Machines
michael@0: *   Corporation and others.  All Rights Reserved.
michael@0: *
michael@0: *******************************************************************************
michael@0: *   file name:  loclikely.cpp
michael@0: *   encoding:   US-ASCII
michael@0: *   tab size:   8 (not used)
michael@0: *   indentation:4
michael@0: *
michael@0: *   created on: 2010feb25
michael@0: *   created by: Markus W. Scherer
michael@0: *
michael@0: *   Code for miscellaneous locale-related resource bundle data access,
michael@0: *   separated out from other .cpp files
michael@0: *   that then do not depend on resource bundle code and this data.
michael@0: */
michael@0: 
michael@0: #include "unicode/utypes.h"
michael@0: #include "unicode/putil.h"
michael@0: #include "unicode/uloc.h"
michael@0: #include "unicode/ures.h"
michael@0: #include "cstring.h"
michael@0: #include "ulocimp.h"
michael@0: #include "uresimp.h"
michael@0: 
michael@0: /*
michael@0:  * Lookup a resource bundle table item with fallback on the table level.
michael@0:  * Regular resource bundle lookups perform fallback to parent locale bundles
michael@0:  * and eventually the root bundle, but only for top-level items.
michael@0:  * This function takes the name of a top-level table and of an item in that table
michael@0:  * and performs a lookup of both, falling back until a bundle contains a table
michael@0:  * with this item.
michael@0:  *
michael@0:  * Note: Only the opening of entire bundles falls back through the default locale
michael@0:  * before root. Once a bundle is open, item lookups do not go through the
michael@0:  * default locale because that would result in a mix of languages that is
michael@0:  * unpredictable to the programmer and most likely useless.
michael@0:  */
michael@0: U_CAPI const UChar * U_EXPORT2
michael@0: uloc_getTableStringWithFallback(const char *path, const char *locale,
michael@0:                               const char *tableKey, const char *subTableKey,
michael@0:                               const char *itemKey,
michael@0:                               int32_t *pLength,
michael@0:                               UErrorCode *pErrorCode)
michael@0: {
michael@0: /*    char localeBuffer[ULOC_FULLNAME_CAPACITY*4];*/
michael@0:     UResourceBundle *rb=NULL, table, subTable;
michael@0:     const UChar *item=NULL;
michael@0:     UErrorCode errorCode;
michael@0:     char explicitFallbackName[ULOC_FULLNAME_CAPACITY] = {0};
michael@0: 
michael@0:     /*
michael@0:      * open the bundle for the current locale
michael@0:      * this falls back through the locale's chain to root
michael@0:      */
michael@0:     errorCode=U_ZERO_ERROR;
michael@0:     rb=ures_open(path, locale, &errorCode);
michael@0: 
michael@0:     if(U_FAILURE(errorCode)) {
michael@0:         /* total failure, not even root could be opened */
michael@0:         *pErrorCode=errorCode;
michael@0:         return NULL;
michael@0:     } else if(errorCode==U_USING_DEFAULT_WARNING ||
michael@0:                 (errorCode==U_USING_FALLBACK_WARNING && *pErrorCode!=U_USING_DEFAULT_WARNING)
michael@0:     ) {
michael@0:         /* set the "strongest" error code (success->fallback->default->failure) */
michael@0:         *pErrorCode=errorCode;
michael@0:     }
michael@0: 
michael@0:     for(;;){
michael@0:         ures_initStackObject(&table);
michael@0:         ures_initStackObject(&subTable);
michael@0:         ures_getByKeyWithFallback(rb, tableKey, &table, &errorCode);
michael@0: 
michael@0:         if (subTableKey != NULL) {
michael@0:             /*
michael@0:             ures_getByKeyWithFallback(&table,subTableKey, &subTable, &errorCode);
michael@0:             item = ures_getStringByKeyWithFallback(&subTable, itemKey, pLength, &errorCode);
michael@0:             if(U_FAILURE(errorCode)){
michael@0:                 *pErrorCode = errorCode;
michael@0:             }
michael@0:             
michael@0:             break;*/
michael@0:             
michael@0:             ures_getByKeyWithFallback(&table,subTableKey, &table, &errorCode);
michael@0:         }
michael@0:         if(U_SUCCESS(errorCode)){
michael@0:             item = ures_getStringByKeyWithFallback(&table, itemKey, pLength, &errorCode);
michael@0:             if(U_FAILURE(errorCode)){
michael@0:                 const char* replacement = NULL;
michael@0:                 *pErrorCode = errorCode; /*save the errorCode*/
michael@0:                 errorCode = U_ZERO_ERROR;
michael@0:                 /* may be a deprecated code */
michael@0:                 if(uprv_strcmp(tableKey, "Countries")==0){
michael@0:                     replacement =  uloc_getCurrentCountryID(itemKey);
michael@0:                 }else if(uprv_strcmp(tableKey, "Languages")==0){
michael@0:                     replacement =  uloc_getCurrentLanguageID(itemKey);
michael@0:                 }
michael@0:                 /*pointer comparison is ok since uloc_getCurrentCountryID & uloc_getCurrentLanguageID return the key itself is replacement is not found*/
michael@0:                 if(replacement!=NULL && itemKey != replacement){
michael@0:                     item = ures_getStringByKeyWithFallback(&table, replacement, pLength, &errorCode);
michael@0:                     if(U_SUCCESS(errorCode)){
michael@0:                         *pErrorCode = errorCode;
michael@0:                         break;
michael@0:                     }
michael@0:                 }
michael@0:             }else{
michael@0:                 break;
michael@0:             }
michael@0:         }
michael@0:         
michael@0:         if(U_FAILURE(errorCode)){    
michael@0: 
michael@0:             /* still can't figure out ?.. try the fallback mechanism */
michael@0:             int32_t len = 0;
michael@0:             const UChar* fallbackLocale =  NULL;
michael@0:             *pErrorCode = errorCode;
michael@0:             errorCode = U_ZERO_ERROR;
michael@0: 
michael@0:             fallbackLocale = ures_getStringByKeyWithFallback(&table, "Fallback", &len, &errorCode);
michael@0:             if(U_FAILURE(errorCode)){
michael@0:                *pErrorCode = errorCode;
michael@0:                 break;
michael@0:             }
michael@0:             
michael@0:             u_UCharsToChars(fallbackLocale, explicitFallbackName, len);
michael@0:             
michael@0:             /* guard against recursive fallback */
michael@0:             if(uprv_strcmp(explicitFallbackName, locale)==0){
michael@0:                 *pErrorCode = U_INTERNAL_PROGRAM_ERROR;
michael@0:                 break;
michael@0:             }
michael@0:             ures_close(rb);
michael@0:             rb = ures_open(path, explicitFallbackName, &errorCode);
michael@0:             if(U_FAILURE(errorCode)){
michael@0:                 *pErrorCode = errorCode;
michael@0:                 break;
michael@0:             }
michael@0:             /* succeeded in opening the fallback bundle .. continue and try to fetch the item */
michael@0:         }else{
michael@0:             break;
michael@0:         }
michael@0:     }
michael@0:     /* done with the locale string - ready to close table and rb */
michael@0:     ures_close(&subTable);
michael@0:     ures_close(&table);
michael@0:     ures_close(rb);
michael@0:     return item;
michael@0: }
michael@0: 
michael@0: static ULayoutType
michael@0: _uloc_getOrientationHelper(const char* localeId,
michael@0:                            const char* key,
michael@0:                            UErrorCode *status)
michael@0: {
michael@0:     ULayoutType result = ULOC_LAYOUT_UNKNOWN;
michael@0: 
michael@0:     if (!U_FAILURE(*status)) {
michael@0:         int32_t length = 0;
michael@0:         char localeBuffer[ULOC_FULLNAME_CAPACITY];
michael@0: 
michael@0:         uloc_canonicalize(localeId, localeBuffer, sizeof(localeBuffer), status);
michael@0: 
michael@0:         if (!U_FAILURE(*status)) {
michael@0:             const UChar* const value =
michael@0:                 uloc_getTableStringWithFallback(
michael@0:                     NULL,
michael@0:                     localeBuffer,
michael@0:                     "layout",
michael@0:                     NULL,
michael@0:                     key,
michael@0:                     &length,
michael@0:                     status);
michael@0: 
michael@0:             if (!U_FAILURE(*status) && length != 0) {
michael@0:                 switch(value[0])
michael@0:                 {
michael@0:                 case 0x0062: /* 'b' */
michael@0:                     result = ULOC_LAYOUT_BTT;
michael@0:                     break;
michael@0:                 case 0x006C: /* 'l' */
michael@0:                     result = ULOC_LAYOUT_LTR;
michael@0:                     break;
michael@0:                 case 0x0072: /* 'r' */
michael@0:                     result = ULOC_LAYOUT_RTL;
michael@0:                     break;
michael@0:                 case 0x0074: /* 't' */
michael@0:                     result = ULOC_LAYOUT_TTB;
michael@0:                     break;
michael@0:                 default:
michael@0:                     *status = U_INTERNAL_PROGRAM_ERROR;
michael@0:                     break;
michael@0:                 }
michael@0:             }
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     return result;
michael@0: }
michael@0: 
michael@0: U_CAPI ULayoutType U_EXPORT2
michael@0: uloc_getCharacterOrientation(const char* localeId,
michael@0:                              UErrorCode *status)
michael@0: {
michael@0:     return _uloc_getOrientationHelper(localeId, "characters", status);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * Get the layout line orientation for the specified locale.
michael@0:  * 
michael@0:  * @param localeID locale name
michael@0:  * @param status Error status
michael@0:  * @return an enum indicating the layout orientation for lines.
michael@0:  */
michael@0: U_CAPI ULayoutType U_EXPORT2
michael@0: uloc_getLineOrientation(const char* localeId,
michael@0:                         UErrorCode *status)
michael@0: {
michael@0:     return _uloc_getOrientationHelper(localeId, "lines", status);
michael@0: }