654 lines
32 KiB
C++
654 lines
32 KiB
C++
/*
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*******************************************************************************
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*
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* Copyright (C) 1996-1999, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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*******************************************************************************
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*
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* File resbund.h
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*
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* CREATED BY
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* Richard Gillam
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*
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* Modification History:
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*
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* Date Name Description
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* 2/5/97 aliu Added scanForLocaleInFile. Added
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* constructor which attempts to read resource bundle
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* from a specific file, without searching other files.
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* 2/11/97 aliu Added UErrorCode return values to constructors. Fixed
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* infinite loops in scanForFile and scanForLocale.
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* Modified getRawResourceData to not delete storage in
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* localeData and resourceData which it doesn't own.
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* Added Mac compatibility #ifdefs for tellp() and
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* ios::nocreate.
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* 2/18/97 helena Updated with 100% documentation coverage.
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* 3/13/97 aliu Rewrote to load in entire resource bundle and store
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* it as a Hashtable of ResourceBundleData objects.
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* Added state table to govern parsing of files.
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* Modified to load locale index out of new file distinct
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* from default.txt.
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* 3/25/97 aliu Modified to support 2-d arrays, needed for timezone data.
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* Added support for custom file suffixes. Again, needed to
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* support timezone data.
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* 4/7/97 aliu Cleaned up.
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* 03/02/99 stephen Removed dependency on FILE*.
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* 03/29/99 helena Merged Bertrand and Stephen's changes.
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* 06/11/99 stephen Removed parsing of .txt files.
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* Reworked to use new binary format.
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* Cleaned up.
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* 06/14/99 stephen Removed methods taking a filename suffix.
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* 11/09/99 weiv Added getLocale(), fRealLocale, removed fRealLocaleID
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*******************************************************************************
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*/
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#ifndef RESBUND_H
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#define RESBUND_H
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#include "unicode/utypes.h"
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#include "unicode/unistr.h"
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#include "unicode/locid.h"
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#include <wchar.h>
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class RBHashtable;
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class ResourceBundleData;
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class ResourceBundleCache;
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class VisitedFileCache;
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#ifndef _FILESTRM
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typedef struct _FileStream FileStream;
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#endif
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/* forward declarations */
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class Locale;
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class RuleBasedCollator;
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class ResourceBundle;
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extern int32_t T_ResourceBundle_countArrayItemsImplementation(
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const ResourceBundle* resourceBundle,
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const char* resourceKey,
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UErrorCode& err);
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extern const UnicodeString** listInstalledLocalesImplementation(
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const char* path,
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int32_t* numInstalledLocales);
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extern void getTaggedArrayUCharsImplementation(
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const ResourceBundle* bundle,
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const char *resourceTag,
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UChar const** itemTags,
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UChar const** items,
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int32_t maxItems,
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int32_t& numItems,
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UErrorCode& err);
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/**
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* A class representing a collection of resource information pertaining to a given
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* locale. A resource bundle provides a way of accessing locale- specfic information in
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* a data file. You create a resource bundle that manages the resources for a given
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* locale and then ask it for individual resources.
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* <P>
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* The resource bundle file is a text (ASCII or Unicode) file with the format:
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* <pre>
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* . locale {
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* . tag1 {...}
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* . tag2 {...}
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* . }
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* </pre>
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* The tags are used to retrieve the data later. You may not have multiple instances of
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* the same tag.
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* <P>
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* Four data types are supported. These are solitary strings, comma-delimited lists of
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* strings, 2-dimensional arrays of strings, and tagged lists of strings.
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* <P>
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* Note that all data is textual. Adjacent strings are merged by the low-level
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* tokenizer, so that the following effects occur: foo bar, baz // 2 elements, "foo
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* bar", and "baz" "foo" "bar", baz // 2 elements, "foobar", and "baz" Note that a
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* single intervening space is added between merged strings, unless they are both double
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* quoted. This extends to more than two strings in a row.
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* <P>
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* Whitespace is ignored, as in a C source file.
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* <P>
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* Solitary strings have the format:
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* <pre>
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* . Tag { Data }
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* </pre>
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* This is indistinguishable from a comma-delimited list with only one element, and in
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* fact may be retrieved as such (as an array, or as element 0 or an array).
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* <P>
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* Comma-delimited lists have the format:
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* <pre>
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* . Tag { Data, Data, Data }
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* </pre>
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* Parsing is lenient; a final string, after the last element, is allowed.
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* <P>
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* Tagged lists have the format:
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* <pre>
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* . Tag { Subtag { Data } Subtag {Data} }
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* </pre>
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* Data is retrieved by specifying the subtag.
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* <P>
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* Two-dimensional arrays have the format:
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* <pre>
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* . TwoD {
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* . { r1c1, r1c2, ..., r1cm },
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* . { r2c1, r2c2, ..., r2cm },
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* . ...
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* . { rnc1, rnc2, ..., rncm }
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* . }
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* </pre>
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* where n is the number of rows, and m is the number of columns. Parsing is lenient (as
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* in other data types). A final comma is always allowed after the last element; either
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* the last string in a row, or the last row itself. Furthermore, since there is no
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* ambiguity, the commas between the rows are entirely optional. (However, if a comma is
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* present, there can only be one comma, no more.) It is possible to have zero columns,
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* as follows:
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* <pre>
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* . Odd { {} {} {} } // 3 x 0 array
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* </pre>
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* But it is impossible to have zero rows. The smallest array is thus a 1 x 0 array,
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* which looks like this:
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* <pre>
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* . Smallest { {} } // 1 x 0 array
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* </pre>
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* The array must be strictly rectangular; that is, each row must have the same number
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* of elements.
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* <P>
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* This is an example for using a possible custom resource:
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* <pre>
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* . Locale currentLocale;
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* . UErrorCode success = U_ZERO_ERROR;
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* . ResourceBundle myResources("MyResources", currentLocale, success );
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* .
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* . UnicodeString button1Title, button2Title;
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* . myResources.getString("OkKey", button1Title, success );
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* . myResources.getString("CancelKey", button2Title, success );
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* </pre>
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*/
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class U_COMMON_API ResourceBundle {
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public:
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/**
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* Constructor
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*
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* @param path This is a full pathname in the platform-specific format for the
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* directory containing the resource data files we want to load
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* resources from. We use locale IDs to generate filenames, and the
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* filenames have this string prepended to them before being passed
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* to the C++ I/O functions. Therefore, this string must always end
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* with a directory delimiter (whatever that is for the target OS)
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* for this class to work correctly.
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* @param locale This is the locale this resource bundle is for. To get resources
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* for the French locale, for example, you would create a
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* ResourceBundle passing Locale::FRENCH for the "locale" parameter,
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* and all subsequent calls to that resource bundle will return
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* resources that pertain to the French locale. If the caller doesn't
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* pass a locale parameter, the default locale for the system (as
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* returned by Locale::getDefault()) will be used.
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* The UErrorCode& err parameter is used to return status information to the user. To
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* check whether the construction succeeded or not, you should check the value of
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* U_SUCCESS(err). If you wish more detailed information, you can check for
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* informational error results which still indicate success. U_USING_FALLBACK_ERROR
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* indicates that a fall back locale was used. For example, 'de_CH' was requested,
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* but nothing was found there, so 'de' was used. U_USING_DEFAULT_ERROR indicates that
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* the default locale data was used; neither the requested locale nor any of its
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* fall back locales could be found.
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*/
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ResourceBundle( const UnicodeString& path,
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const Locale& locale,
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UErrorCode& err);
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ResourceBundle( const UnicodeString& path,
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UErrorCode& err);
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ResourceBundle( const wchar_t* path,
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const Locale& locale,
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UErrorCode& err);
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~ResourceBundle();
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/**
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* Returns the contents of a string resource. Resource data is undifferentiated
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* Unicode text. The resource file may contain quoted strings or escape sequences;
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* these will be parsed prior to the data's return.
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* [THIS FUNCTION IS DERECATED; USE THE OVERLOAD BELOW INSTEAD]
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*
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* @param resourceTag The resource tag of the string resource the caller wants
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* @param theString Receives the actual data in the resource
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* @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the
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* specified tag couldn't be found.
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*/
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void getString( const char *resourceTag,
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UnicodeString& theString,
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UErrorCode& err) const;
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/**
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* Returns the contents of a string resource. Resource data is undifferentiated
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* Unicode text. The resource file may contain quoted strings or escape sequences;
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* these will be parsed prior to the data's return.
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*
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* @param resourceTag The resource tag of the string resource the caller wants
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* @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the
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* specified tag couldn't be found.
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* @return A pointer to the string from the resource bundle, or NULL if there was
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* an error.
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*/
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const UnicodeString* getString( const char *resourceTag,
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UErrorCode& err) const;
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/**
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* Returns the contents of a string-array resource. This will return the contents of
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* a string-array (comma-delimited-list) resource as a C++ array of UnicodeString
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* objects. The number of elements in the array is returned in numArrayItems.
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* Calling getStringArray on a resource of type string will return an array with one
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* element; calling it on a resource of type tagged-array results in a
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* U_MISSING_RESOURCE_ERROR error.
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*
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* @param resourceTag The resource tag of the string-array resource the caller
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* wants
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* @param numArrayItems Receives the number of items in the array the function
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* returns.
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* @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the
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* specified tag couldn't be found.
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* @return The resource requested, as a pointer to an array of
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* UnicodeStrings. The caller does not own the storage and
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* must not delete it.
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*/
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const UnicodeString* getStringArray( const char *resourceTag,
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int32_t& numArrayItems,
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UErrorCode& err) const;
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/**
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* Returns a single item from a string-array resource. This will return the contents
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* of a single item in a resource of string-array (comma-delimited-list) type. If
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* the resource is not an array, a U_MISSING_RESOURCE_ERROR will be returned in err.
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* [THIS FUNCTION IS DEPRECATED; USE THE OVERLOAD BELOW INSTEAD]
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*
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* @param resourceTag The resource tag of the resource the caller wants to extract
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* an item from.
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* @param index The index (zero-based) of the particular array item the user
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* wants to extract from the resource.
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* @param theArrayItem Receives the actual text of the desired array item.
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* @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the
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* specified tag couldn't be found, or if the index was out of range.
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*/
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void getArrayItem( const char *resourceTag,
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int32_t index,
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UnicodeString& theArrayItem,
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UErrorCode& err) const;
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/**
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* Returns a single item from a string-array resource. This will return the contents
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* of a single item in a resource of string-array (comma-delimited-list) type. If
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* the resource is not an array, a U_MISSING_RESOURCE_ERROR will be returned in err.
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*
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* @param resourceTag The resource tag of the resource the caller wants to extract
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* an item from.
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* @param index The index (zero-based) of the particular array item the user
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* wants to extract from the resource.
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* @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the
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* specified tag couldn't be found, or if the index was out of range.
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* @return A pointer to the text of the array item, or NULL is there was an error.
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*/
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const UnicodeString* getArrayItem( const char *resourceTag,
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int32_t index,
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UErrorCode& err) const;
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/**
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* Return the contents of a 2-dimensional array resource. The return value will be a
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* UnicodeString** array. (This is really an array of pointers; each pointer is a
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* ROW of the data.) The number of rows and columns is returned. If the resource is
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* of the wrong type, or not present, U_MISSING_RESOURCE_ERROR is placed in err.
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*
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* @param resourceTag The resource tag of the string-array resource the caller
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* wants
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* @param rowCount Receives the number of rows in the array the function
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* returns.
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* @param columnCount Receives the number of columns in the array the function
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* returns.
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* @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the
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* specified tag couldn't be found.
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* @return The resource requested, as a UnicodeStrings**. The caller
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* does not own the storage and must not delete it.
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*/
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const UnicodeString** get2dArray(const char *resourceTag,
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int32_t& rowCount,
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int32_t& columnCount,
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UErrorCode& err) const;
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/**
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* Return a single string from a 2-dimensional array resource. If the resource does
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* not exists, or if it is not a 2-d array, or if the row or column indices are out
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* of bounds, err is set to U_MISSING_RESOURCE_ERROR.
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* [THIS FUNCTION IS DEPRECATED; USE THE OVERLOAD BELOW INSTEAD]
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*
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* @param resourceTag The resource tag of the resource the caller wants to extract
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* an item from.
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* @param rowIndex The row index (zero-based) of the array item the user wants
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* to extract from the resource.
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* @param columnIndex The column index (zero-based) of the array item the user
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* wants to extract from the resource.
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* @param theArrayItem Receives the actual text of the desired array item.
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* @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the
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* specified tag couldn't be found, if the resource data was in
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* the wrong format, or if either index is out of bounds.
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*/
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void get2dArrayItem(const char *resourceTag,
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int32_t rowIndex,
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int32_t columnIndex,
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UnicodeString& theArrayItem,
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UErrorCode& err) const;
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/**
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* Return a single string from a 2-dimensional array resource. If the resource does
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* not exists, or if it is not a 2-d array, or if the row or column indices are out
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* of bounds, err is set to U_MISSING_RESOURCE_ERROR.
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*
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* @param resourceTag The resource tag of the resource the caller wants to extract
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* an item from.
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* @param rowIndex The row index (zero-based) of the array item the user wants
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* to extract from the resource.
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* @param columnIndex The column index (zero-based) of the array item the user
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* wants to extract from the resource.
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* @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the
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* specified tag couldn't be found, if the resource data was in
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* the wrong format, or if either index is out of bounds.
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* @return A pointer to the text of the array item, or NULL is there was an error.
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*/
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const UnicodeString* get2dArrayItem( const char *resourceTag,
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int32_t rowIndex,
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int32_t columnIndex,
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UErrorCode& err) const;
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/**
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* Returns a single item from a tagged-array resource This will return the contents
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* of a single item in a resource of type tagged-array. If this function is called
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* for a resource that is not of type tagged-array, it will set err to
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* MISSING_RESOUCE_ERROR.
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* [THIS FUNCTION IS DEPRECATED; USE THE OVERLOAD BELOW INSTEAD]
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*
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* @param resourceTag The resource tag of the resource the caller wants to extract
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* an item from.
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* @param itemTag The item tag for the item the caller wants to extract.
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* @param theArrayItem Receives the text of the desired array item.
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* @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the
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* specified resource tag couldn't be found, or if an item
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* with the specified item tag couldn't be found in the resource.
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*/
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void getTaggedArrayItem( const char *resourceTag,
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const UnicodeString& itemTag,
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UnicodeString& theArrayItem,
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UErrorCode& err) const;
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/**
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* Returns a single item from a tagged-array resource This will return the contents
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* of a single item in a resource of type tagged-array. If this function is called
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* for a resource that is not of type tagged-array, it will set err to
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* MISSING_RESOUCE_ERROR.
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*
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* @param resourceTag The resource tag of the resource the caller wants to extract
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* an item from.
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* @param itemTag The item tag for the item the caller wants to extract.
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* @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the
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* specified resource tag couldn't be found, or if an item
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* with the specified item tag coldn't be found in the resource.
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* @return A pointer to the text of the array item, or NULL is there was an error.
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*/
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const UnicodeString* getTaggedArrayItem( const char *resourceTag,
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const UnicodeString& itemTag,
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UErrorCode& err) const;
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/**
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* Returns a tagged-array resource. The contents of the resource is returned as two
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* separate arrays of UnicodeStrings, the addresses of which are placed in "itemTags"
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* and "items". After calling this function, the items in the resource will be in the
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* list pointed to by "items", and for each items[i], itemTags[i] will be the tag that
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* corresponds to it. The total number of entries in both arrays is returned in
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* numItems.
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*
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* @param resourceTag The resource tag of the resource the caller wants to extract
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* an item from.
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* @param itemTags Set to point to an array of UnicodeStrings representing the
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* tags in the specified resource. The caller DOES own this array,
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* and must delete it.
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* @param items Set to point to an array of UnicodeStrings containing the
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* individual resource items themselves. itemTags[i] will
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* contain the tag corresponding to items[i]. The caller DOES
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* own this array, and must delete it.
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* @param numItems Receives the number of items in the arrays pointed to by
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* items and itemTags.
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* @param err Set to U_MISSING_RESOURCE_ERROR if a resource with the
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* specified tag couldn't be found.
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*/
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void getTaggedArray( const char *resourceTag,
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UnicodeString*& itemTags,
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UnicodeString*& items,
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int32_t& numItems,
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UErrorCode& err) const;
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/**
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* Return the version number associated with this ResourceBundle. This version
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* number is a string of the form MAJOR.MINOR, where MAJOR is the version number of
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* the current analytic code package, and MINOR is the version number contained in
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* the resource file as the value of the tag "Version". A change in the MINOR
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* version indicated an updated data file. A change in the MAJOR version indicates a
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* new version of the code which is not binary-compatible with the previous version.
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* If no "Version" tag is present in a resource file, the MINOR version "0" is assigned.
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*
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* For example, if the Collation sort key algorithm changes, the MAJOR version
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* increments. If the collation data in a resource file changes, the MINOR version
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* for that file increments.
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*
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* @return A string of the form N.n, where N is the major version number,
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* representing the code version, and n is the minor version number,
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* representing the resource data file. The caller does not own this
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* string.
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*/
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const char* getVersionNumber(void) const;
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/**
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* Return the Locale associated with this ResourceBundle.
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*
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* @return a Locale object
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*/
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const Locale &getLocale(void) const ;
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private:
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class U_COMMON_API PathInfo {
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public:
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PathInfo();
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PathInfo(const PathInfo& source);
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PathInfo(const UnicodeString& path);
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PathInfo(const UnicodeString& path, const UnicodeString& suffix);
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PathInfo(const wchar_t* path, const wchar_t* suffix);
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~PathInfo();
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PathInfo& operator=(const PathInfo& source);
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bool_t fileExists(const UnicodeString& localeName) const;
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UnicodeString makeCacheKey(const UnicodeString& localeName) const;
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UnicodeString makeHashkey(const UnicodeString& localeName) const;
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FileStream* openFile(const UnicodeString& localeName) const;
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private:
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static const UChar kSeparator;
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UnicodeString fPrefix;
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UnicodeString fSuffix;
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wchar_t* fWPrefix;
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wchar_t* fWSuffix;
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};
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private:
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friend class Locale;
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friend class RuleBasedCollator;
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friend int32_t T_ResourceBundle_countArrayItemsImplementation(const ResourceBundle* resourceBundle,
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const char* resourceKey,
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UErrorCode& err) ;
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friend const UnicodeString** listInstalledLocalesImplementation(const char* path,
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int32_t* numInstalledLocales);
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friend void getTaggedArrayUCharsImplementation(
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const ResourceBundle* bundle,
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const char *resourceTag,
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UChar const** itemTags,
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UChar const** items,
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int32_t maxItems,
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int32_t& numItems,
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UErrorCode& err);
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|
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/**
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* This constructor is used by Collation to load a resource bundle from a specific
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* file, without trying other files. This is used by the Collation caching
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* mechanism.
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*/
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ResourceBundle( const UnicodeString& path,
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const UnicodeString& localeName,
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UErrorCode& status);
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/**
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* Return a list of all installed locales. This function returns a list of the IDs
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* of all locales represented in the directory specified by this ResourceBundle. It
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* depends on that directory having an "Index" tagged-list item in its "index.txt"
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* file; it parses that list to determine its return value (therefore, that list
|
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* also has to be up to date). This function is static.
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*
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* This function is the implementation of the Locale::listInstalledLocales()
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* function. It's private because the API for it real;ly belongs in Locale.
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*
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* @param path The path to the locale data files. The function will
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* look here for "index.txt".
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* @param numInstalledLocales Receives the number of installed locales, according
|
|
* to the Index resource in index.txt.
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|
* @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
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* in this list is derived from the Index resource in
|
|
* default.txt, which must be kept up to date.
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|
*/
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|
static const UnicodeString* listInstalledLocales(const UnicodeString& path,
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int32_t& numInstalledLocales);
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/**
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* Retrieve a ResourceBundle from the cache. Return NULL if not found.
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*/
|
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static const UHashtable* getFromCache(const PathInfo& path,
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const UnicodeString& localeName,
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|
ResourceBundleCache* someCache);
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|
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static const UHashtable* getFromCacheWithFallback(const PathInfo& path,
|
|
const UnicodeString& desiredLocale,
|
|
UnicodeString& returnedLocale,
|
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ResourceBundleCache* someCache,
|
|
UErrorCode& error);
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|
|
|
/**
|
|
* Handlers which are passed to parse() have this signature.
|
|
*/
|
|
typedef void (*Handler)(const UnicodeString& localeName,
|
|
UHashtable* hashtable,
|
|
void* context,
|
|
ResourceBundleCache* someCache);
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|
|
|
/**
|
|
* 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
|