/* ******************************************************************************* * * Copyright (C) 1996-1999, International Business Machines * Corporation and others. All Rights Reserved. * ******************************************************************************* * * File resbund.h * * CREATED BY * Richard Gillam * * Modification History: * * Date Name Description * 2/5/97 aliu Added scanForLocaleInFile. Added * constructor which attempts to read resource bundle * from a specific file, without searching other files. * 2/11/97 aliu Added UErrorCode return values to constructors. Fixed * infinite loops in scanForFile and scanForLocale. * Modified getRawResourceData to not delete storage in * localeData and resourceData which it doesn't own. * Added Mac compatibility #ifdefs for tellp() and * ios::nocreate. * 2/18/97 helena Updated with 100% documentation coverage. * 3/13/97 aliu Rewrote to load in entire resource bundle and store * it as a Hashtable of ResourceBundleData objects. * Added state table to govern parsing of files. * Modified to load locale index out of new file distinct * from default.txt. * 3/25/97 aliu Modified to support 2-d arrays, needed for timezone data. * Added support for custom file suffixes. Again, needed to * support timezone data. * 4/7/97 aliu Cleaned up. * 03/02/99 stephen Removed dependency on FILE*. * 03/29/99 helena Merged Bertrand and Stephen's changes. * 06/11/99 stephen Removed parsing of .txt files. * Reworked to use new binary format. * Cleaned up. * 06/14/99 stephen Removed methods taking a filename suffix. * 11/09/99 weiv Added getLocale(), fRealLocale, removed fRealLocaleID ******************************************************************************* */ #ifndef RESBUND_H #define RESBUND_H #include "utypes.h" #include "unistr.h" #include "locid.h" #include class RBHashtable; class ResourceBundleData; class ResourceBundleCache; class VisitedFileCache; #ifndef _FILESTRM typedef struct _FileStream FileStream; #endif /** * A class representing a collection of resource information pertaining to a given * locale. A resource bundle provides a way of accessing locale- specfic information in * a data file. You create a resource bundle that manages the resources for a given * locale and then ask it for individual resources. *

* The resource bundle file is a text (ASCII or Unicode) file with the format: * 

 * .   locale {
 * .      tag1 {...}
 * .      tag2 {...}
 * .   }
 *
* The tags are used to retrieve the data later. You may not have multiple instances of * the same tag. *

* Four data types are supported. These are solitary strings, comma-delimited lists of * strings, 2-dimensional arrays of strings, and tagged lists of strings. *

* Note that all data is textual. Adjacent strings are merged by the low-level * tokenizer, so that the following effects occur: foo bar, baz // 2 elements, "foo * bar", and "baz" "foo" "bar", baz // 2 elements, "foobar", and "baz" Note that a * single intervening space is added between merged strings, unless they are both double * quoted. This extends to more than two strings in a row. *

* Whitespace is ignored, as in a C source file. *

* Solitary strings have the format: * 

 * .   Tag { Data }
 *
* This is indistinguishable from a comma-delimited list with only one element, and in * fact may be retrieved as such (as an array, or as element 0 or an array). *

* Comma-delimited lists have the format: * 

 * .   Tag { Data, Data, Data }
 *
* Parsing is lenient; a final string, after the last element, is allowed. *

* Tagged lists have the format: * 

 * .   Tag { Subtag { Data } Subtag {Data} }
 *
* Data is retrieved by specifying the subtag. *

* Two-dimensional arrays have the format: * 

 * .   TwoD {
 * .       { r1c1, r1c2, ..., r1cm },
 * .       { r2c1, r2c2, ..., r2cm },
 * .       ...
 * .       { rnc1, rnc2, ..., rncm }
 * .   }
 *
* where n is the number of rows, and m is the number of columns. Parsing is lenient (as * in other data types). A final comma is always allowed after the last element; either * the last string in a row, or the last row itself. Furthermore, since there is no * ambiguity, the commas between the rows are entirely optional. (However, if a comma is * present, there can only be one comma, no more.) It is possible to have zero columns, * as follows: * 
 * .   Odd { {} {} {} } // 3 x 0 array
 *
* But it is impossible to have zero rows. The smallest array is thus a 1 x 0 array, * which looks like this: * 
 * .   Smallest { {} } // 1 x 0 array
 *
* The array must be strictly rectangular; that is, each row must have the same number * of elements. *

* This is an example for using a possible custom resource: * 

 * .    Locale currentLocale;
 * .    UErrorCode success = U_ZERO_ERROR;
 * .    ResourceBundle myResources("MyResources", currentLocale, success );
 * .
 * .    UnicodeString button1Title, button2Title;
 * .    myResources.getString("OkKey", button1Title, success );
 * .    myResources.getString("CancelKey", button2Title, success );
 *
*/ class U_COMMON_API ResourceBundle { public: /** * Constructor * * @param path This is a full pathname in the platform-specific format for the * directory containing the resource data files we want to load * resources from. We use locale IDs to generate filenames, and the * filenames have this string prepended to them before being passed * to the C++ I/O functions. Therefore, this string must always end * with a directory delimiter (whatever that is for the target OS) * for this class to work correctly. * @param locale This is the locale this resource bundle is for. To get resources * for the French locale, for example, you would create a * ResourceBundle passing Locale::FRENCH for the "locale" parameter, * and all subsequent calls to that resource bundle will return * resources that pertain to the French locale. If the caller doesn't * pass a locale parameter, the default locale for the system (as * returned by Locale::getDefault()) will be used. * The UErrorCode& err parameter is used to return status information to the user. To * check whether the construction succeeded or not, you should check the value of * U_SUCCESS(err). If you wish more detailed information, you can check for * informational error results which still indicate success. U_USING_FALLBACK_ERROR * indicates that a fall back locale was used. For example, 'de_CH' was requested, * but nothing was found there, so 'de' was used. U_USING_DEFAULT_ERROR indicates that * the default locale data was used; neither the requested locale nor any of its * fall back locales could be found. */ ResourceBundle( const UnicodeString& path, const Locale& locale, UErrorCode& err); ResourceBundle( const UnicodeString& path, UErrorCode& err); ResourceBundle( const wchar_t* path, const Locale& locale, UErrorCode& err); ~ResourceBundle(); /** * Returns the contents of a string resource. Resource data is undifferentiated * Unicode text. The resource file may contain quoted strings or escape sequences; * these will be parsed prior to the data's return. * [THIS FUNCTION IS DERECATED; USE THE OVERLOAD BELOW INSTEAD] * * @param resourceTag The resource tag of the string resource the caller wants * @param theString Receives the actual data in the resource * @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the * specified tag couldn't be found. */ void getString( const char *resourceTag, UnicodeString& theString, UErrorCode& err) const; /** * Returns the contents of a string resource. Resource data is undifferentiated * Unicode text. The resource file may contain quoted strings or escape sequences; * these will be parsed prior to the data's return. * * @param resourceTag The resource tag of the string resource the caller wants * @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the * specified tag couldn't be found. * @return A pointer to the string from the resource bundle, or NULL if there was * an error. */ const UnicodeString* getString( const char *resourceTag, UErrorCode& err) const; /** * Returns the contents of a string-array resource. This will return the contents of * a string-array (comma-delimited-list) resource as a C++ array of UnicodeString * objects. The number of elements in the array is returned in numArrayItems. * Calling getStringArray on a resource of type string will return an array with one * element; calling it on a resource of type tagged-array results in a * U_MISSING_RESOURCE_ERROR error. * * @param resourceTag The resource tag of the string-array resource the caller * wants * @param numArrayItems Receives the number of items in the array the function * returns. * @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the * specified tag couldn't be found. * @return The resource requested, as a pointer to an array of * UnicodeStrings. The caller does not own the storage and * must not delete it. */ const UnicodeString* getStringArray( const char *resourceTag, int32_t& numArrayItems, UErrorCode& err) const; /** * Returns a single item from a string-array resource. This will return the contents * of a single item in a resource of string-array (comma-delimited-list) type. If * the resource is not an array, a U_MISSING_RESOURCE_ERROR will be returned in err. * [THIS FUNCTION IS DEPRECATED; USE THE OVERLOAD BELOW INSTEAD] * * @param resourceTag The resource tag of the resource the caller wants to extract * an item from. * @param index The index (zero-based) of the particular array item the user * wants to extract from the resource. * @param theArrayItem Receives the actual text of the desired array item. * @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the * specified tag couldn't be found, or if the index was out of range. */ void getArrayItem( const char *resourceTag, int32_t index, UnicodeString& theArrayItem, UErrorCode& err) const; /** * Returns a single item from a string-array resource. This will return the contents * of a single item in a resource of string-array (comma-delimited-list) type. If * the resource is not an array, a U_MISSING_RESOURCE_ERROR will be returned in err. * * @param resourceTag The resource tag of the resource the caller wants to extract * an item from. * @param index The index (zero-based) of the particular array item the user * wants to extract from the resource. * @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the * specified tag couldn't be found, or if the index was out of range. * @return A pointer to the text of the array item, or NULL is there was an error. */ const UnicodeString* getArrayItem( const char *resourceTag, int32_t index, UErrorCode& err) const; /** * Return the contents of a 2-dimensional array resource. The return value will be a * UnicodeString** array. (This is really an array of pointers; each pointer is a * ROW of the data.) The number of rows and columns is returned. If the resource is * of the wrong type, or not present, U_MISSING_RESOURCE_ERROR is placed in err. * * @param resourceTag The resource tag of the string-array resource the caller * wants * @param rowCount Receives the number of rows in the array the function * returns. * @param columnCount Receives the number of columns in the array the function * returns. * @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the * specified tag couldn't be found. * @return The resource requested, as a UnicodeStrings**. The caller * does not own the storage and must not delete it. */ const UnicodeString** get2dArray(const char *resourceTag, int32_t& rowCount, int32_t& columnCount, UErrorCode& err) const; /** * Return a single string from a 2-dimensional array resource. If the resource does * not exists, or if it is not a 2-d array, or if the row or column indices are out * of bounds, err is set to U_MISSING_RESOURCE_ERROR. * [THIS FUNCTION IS DEPRECATED; USE THE OVERLOAD BELOW INSTEAD] * * @param resourceTag The resource tag of the resource the caller wants to extract * an item from. * @param rowIndex The row index (zero-based) of the array item the user wants * to extract from the resource. * @param columnIndex The column index (zero-based) of the array item the user * wants to extract from the resource. * @param theArrayItem Receives the actual text of the desired array item. * @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the * specified tag couldn't be found, if the resource data was in * the wrong format, or if either index is out of bounds. */ void get2dArrayItem(const char *resourceTag, int32_t rowIndex, int32_t columnIndex, UnicodeString& theArrayItem, UErrorCode& err) const; /** * Return a single string from a 2-dimensional array resource. If the resource does * not exists, or if it is not a 2-d array, or if the row or column indices are out * of bounds, err is set to U_MISSING_RESOURCE_ERROR. * * @param resourceTag The resource tag of the resource the caller wants to extract * an item from. * @param rowIndex The row index (zero-based) of the array item the user wants * to extract from the resource. * @param columnIndex The column index (zero-based) of the array item the user * wants to extract from the resource. * @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the * specified tag couldn't be found, if the resource data was in * the wrong format, or if either index is out of bounds. * @return A pointer to the text of the array item, or NULL is there was an error. */ const UnicodeString* get2dArrayItem( const char *resourceTag, int32_t rowIndex, int32_t columnIndex, UErrorCode& err) const; /** * Returns a single item from a tagged-array resource This will return the contents * of a single item in a resource of type tagged-array. If this function is called * for a resource that is not of type tagged-array, it will set err to * MISSING_RESOUCE_ERROR. * [THIS FUNCTION IS DEPRECATED; USE THE OVERLOAD BELOW INSTEAD] * * @param resourceTag The resource tag of the resource the caller wants to extract * an item from. * @param itemTag The item tag for the item the caller wants to extract. * @param theArrayItem Receives the text of the desired array item. * @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the * specified resource tag couldn't be found, or if an item * with the specified item tag couldn't be found in the resource. */ void getTaggedArrayItem( const char *resourceTag, const UnicodeString& itemTag, UnicodeString& theArrayItem, UErrorCode& err) const; /** * Returns a single item from a tagged-array resource This will return the contents * of a single item in a resource of type tagged-array. If this function is called * for a resource that is not of type tagged-array, it will set err to * MISSING_RESOUCE_ERROR. * * @param resourceTag The resource tag of the resource the caller wants to extract * an item from. * @param itemTag The item tag for the item the caller wants to extract. * @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the * specified resource tag couldn't be found, or if an item * with the specified item tag coldn't be found in the resource. * @return A pointer to the text of the array item, or NULL is there was an error. */ const UnicodeString* getTaggedArrayItem( const char *resourceTag, const UnicodeString& itemTag, UErrorCode& err) const; /** * Returns a tagged-array resource. The contents of the resource is returned as two * separate arrays of UnicodeStrings, the addresses of which are placed in "itemTags" * and "items". After calling this function, the items in the resource will be in the * list pointed to by "items", and for each items[i], itemTags[i] will be the tag that * corresponds to it. The total number of entries in both arrays is returned in * numItems. * * @param resourceTag The resource tag of the resource the caller wants to extract * an item from. * @param itemTags Set to point to an array of UnicodeStrings representing the * tags in the specified resource. The caller DOES own this array, * and must delete it. * @param items Set to point to an array of UnicodeStrings containing the * individual resource items themselves. itemTags[i] will * contain the tag corresponding to items[i]. The caller DOES * own this array, and must delete it. * @param numItems Receives the number of items in the arrays pointed to by * items and itemTags. * @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the * specified tag couldn't be found. */ void getTaggedArray( const char *resourceTag, UnicodeString*& itemTags, UnicodeString*& items, int32_t& numItems, UErrorCode& err) const; /** * Return the version number associated with this ResourceBundle. This version * number is a string of the form MAJOR.MINOR, where MAJOR is the version number of * the current analytic code package, and MINOR is the version number contained in * the resource file as the value of the tag "Version". A change in the MINOR * version indicated an updated data file. A change in the MAJOR version indicates a * new version of the code which is not binary-compatible with the previous version. * If no "Version" tag is present in a resource file, the MINOR version "0" is assigned. * * For example, if the Collation sort key algorithm changes, the MAJOR version * increments. If the collation data in a resource file changes, the MINOR version * for that file increments. * * @return A string of the form N.n, where N is the major version number, * representing the code version, and n is the minor version number, * representing the resource data file. The caller does not own this * string. */ const char* getVersionNumber(void) const; /** * Return the Locale associated with this ResourceBundle. * * @return a Locale object */ const Locale &getLocale(void) const ; private: class U_COMMON_API PathInfo { public: PathInfo(); PathInfo(const PathInfo& source); PathInfo(const UnicodeString& path); PathInfo(const UnicodeString& path, const UnicodeString& suffix); PathInfo(const wchar_t* path, const wchar_t* suffix); ~PathInfo(); PathInfo& operator=(const PathInfo& source); bool_t fileExists(const UnicodeString& localeName) const; UnicodeString makeCacheKey(const UnicodeString& localeName) const; UnicodeString makeHashkey(const UnicodeString& localeName) const; FileStream* openFile(const UnicodeString& localeName) const; private: static const UChar kSeparator; UnicodeString fPrefix; UnicodeString fSuffix; wchar_t* fWPrefix; wchar_t* fWSuffix; }; private: friend class Locale; friend class RuleBasedCollator; friend int32_t T_ResourceBundle_countArrayItemsImplementation(const ResourceBundle* resourceBundle, const char* resourceKey, UErrorCode& err) ; friend const UnicodeString** listInstalledLocalesImplementation(const char* path, int32_t* numInstalledLocales); friend void getTaggedArrayUCharsImplementation( const ResourceBundle* bundle, const char *resourceTag, UChar const** itemTags, UChar const** items, int32_t maxItems, int32_t& numItems, UErrorCode& err); /** * This constructor is used by Collation to load a resource bundle from a specific * file, without trying other files. This is used by the Collation caching * mechanism. */ ResourceBundle( const UnicodeString& path, const UnicodeString& localeName, UErrorCode& status); /** * Return a list of all installed locales. This function returns a list of the IDs * of all locales represented in the directory specified by this ResourceBundle. It * depends on that directory having an "Index" tagged-list item in its "index.txt" * file; it parses that list to determine its return value (therefore, that list * also has to be up to date). This function is static. * * This function is the implementation of the Locale::listInstalledLocales() * function. It's private because the API for it real;ly belongs in Locale. * * @param path The path to the locale data files. The function will * look here for "index.txt". * @param numInstalledLocales Receives the number of installed locales, according * to the Index resource in index.txt. * @return A list of the installed locales, as a pointer to an * array of UnicodeStrings. This storage is not owned by * the caller, who must not delete it. The information * in this list is derived from the Index resource in * default.txt, which must be kept up to date. */ static const UnicodeString* listInstalledLocales(const UnicodeString& path, int32_t& numInstalledLocales); /** * Retrieve a ResourceBundle from the cache. Return NULL if not found. */ static const UHashtable* getFromCache(const PathInfo& path, const UnicodeString& localeName, ResourceBundleCache* someCache); static const UHashtable* getFromCacheWithFallback(const PathInfo& path, const UnicodeString& desiredLocale, UnicodeString& returnedLocale, ResourceBundleCache* someCache, UErrorCode& error); /** * Handlers which are passed to parse() have this signature. */ typedef void (*Handler)(const UnicodeString& localeName, UHashtable* hashtable, void* context, ResourceBundleCache* someCache); /** * Parse a file, storing the resource data in the cache. */ static void parse(const PathInfo& path, const UnicodeString& localeName, Handler handler, void* context, ResourceBundleCache* someCache, UErrorCode &error); /** * If the given file exists and has not been parsed, then parse it (caching the * resultant data) and return true. */ static bool_t parseIfUnparsed(const PathInfo& path, const UnicodeString& locale, ResourceBundleCache* fCache, VisitedFileCache* vCache, UErrorCode& error); const UHashtable* getHashtableForLocale(const UnicodeString& localeName, UnicodeString& returnedLocale, UErrorCode& err); const UHashtable* getHashtableForLocale(const UnicodeString& desiredLocale, UErrorCode& error); const ResourceBundleData* getDataForTag(const char *tag, UErrorCode& err) const; void constructForLocale(const PathInfo& path, const Locale& locale, UErrorCode& error); static void addToCache(const UnicodeString& localeName, UHashtable* hashtable, void* context, ResourceBundleCache* someCache); static void saveCollationHashtable(const UnicodeString& localeName, UHashtable* hashtable, void* context, ResourceBundleCache* cache); private: /** * This internal class iterates over the fallback and/or default locales. It * progresses as follows: Specific: language+country+variant language+country * language Default: language+country+variant language+country language Root: */ class LocaleFallbackIterator { public: LocaleFallbackIterator(const UnicodeString& startingLocale, const UnicodeString& root, bool_t useDefaultLocale); const UnicodeString& getLocale(void) const { return fLocale; } bool_t nextLocale(UErrorCode& status); private: void chopLocale(void); UnicodeString fLocale; UnicodeString fDefaultLocale; UnicodeString fRoot; bool_t fUseDefaultLocale; bool_t fTriedDefaultLocale; bool_t fTriedRoot; }; private: static const char* kDefaultSuffix; static const int32_t kDefaultSuffixLen; static const char* kDefaultFilename; static const char* kDefaultLocaleName; static const char* kIndexLocaleName; static const char* kIndexFilename; static const char* kIndexTag; static const char* kDefaultMinorVersion; static const char* kVersionSeparator; static const char* kVersionTag; static ResourceBundleCache* fgUserCache; static VisitedFileCache* fgUserVisitedFiles; ResourceBundleCache* fgCache; VisitedFileCache* fgVisitedFiles; /** * Data members. The ResourceBundle object is kept lightweight by having the fData[] * array entries be non-owned pointers. The cache (fgCache) owns the entries and * will delete them at static destruction time. */ PathInfo fPath; enum { kDataCount = 4 }; const UHashtable* fData[kDataCount]; // These aren't const if fIsDataOwned is true bool_t fLoaded[kDataCount]; UErrorCode fDataStatus[kDataCount]; // Returns the appropriate error code for each data table. bool_t fIsDataOwned; Locale fRealLocale; LocaleFallbackIterator* fLocaleIterator; char* fVersionID; }; #endif