499 lines
18 KiB
C++
499 lines
18 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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******************************************************************************
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*
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* Copyright (C) 1996-2013, International Business Machines Corporation
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* 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
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* in 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
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* distinct from default.txt.
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* 3/25/97 aliu Modified to support 2-d arrays, needed for timezone
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* data. Added support for custom file suffixes. Again,
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* needed to 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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#if U_SHOW_CPLUSPLUS_API
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#include "unicode/uobject.h"
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#include "unicode/ures.h"
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#include "unicode/unistr.h"
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#include "unicode/locid.h"
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/**
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* \file
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* \brief C++ API: Resource Bundle
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*/
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U_NAMESPACE_BEGIN
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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- specific 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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* Resource bundles in ICU4C are currently defined using text files which conform to the following
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* <a href="https://github.com/unicode-org/icu-docs/blob/main/design/bnf_rb.txt">BNF definition</a>.
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* More on resource bundle concepts and syntax can be found in the
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* <a href="https://unicode-org.github.io/icu/userguide/locale/resources">Users Guide</a>.
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* <P>
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*
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* The ResourceBundle class is not suitable for subclassing.
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*
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* @stable ICU 2.0
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*/
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class U_COMMON_API ResourceBundle : public UObject {
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public:
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/**
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* Constructor
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*
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* @param packageName The packageName and locale together point to an ICU udata object,
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* as defined by <code> udata_open( packageName, "res", locale, err) </code>
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* or equivalent. Typically, packageName will refer to a (.dat) file, or to
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* a package registered with udata_setAppData(). Using a full file or directory
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* pathname for packageName is deprecated.
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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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* @param err The Error Code.
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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_WARNING
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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_WARNING 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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* @stable ICU 2.0
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*/
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ResourceBundle(const UnicodeString& packageName,
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const Locale& locale,
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UErrorCode& err);
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/**
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* Construct a resource bundle for the default bundle in the specified package.
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*
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* @param packageName The packageName and locale together point to an ICU udata object,
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* as defined by <code> udata_open( packageName, "res", locale, err) </code>
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* or equivalent. Typically, packageName will refer to a (.dat) file, or to
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* a package registered with udata_setAppData(). Using a full file or directory
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* pathname for packageName is deprecated.
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* @param err A UErrorCode value
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* @stable ICU 2.0
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*/
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ResourceBundle(const UnicodeString& packageName,
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UErrorCode& err);
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/**
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* Construct a resource bundle for the ICU default bundle.
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*
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* @param err A UErrorCode value
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* @stable ICU 2.0
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*/
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ResourceBundle(UErrorCode &err);
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/**
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* Standard constructor, constructs a resource bundle for the locale-specific
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* bundle in the specified package.
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*
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* @param packageName The packageName and locale together point to an ICU udata object,
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* as defined by <code> udata_open( packageName, "res", locale, err) </code>
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* or equivalent. Typically, packageName will refer to a (.dat) file, or to
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* a package registered with udata_setAppData(). Using a full file or directory
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* pathname for packageName is deprecated.
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* NULL is used to refer to ICU data.
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* @param locale The locale for which to open a resource bundle.
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* @param err A UErrorCode value
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* @stable ICU 2.0
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*/
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ResourceBundle(const char* packageName,
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const Locale& locale,
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UErrorCode& err);
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/**
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* Copy constructor.
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*
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* @param original The resource bundle to copy.
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* @stable ICU 2.0
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*/
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ResourceBundle(const ResourceBundle &original);
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/**
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* Constructor from a C UResourceBundle. The resource bundle is
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* copied and not adopted. ures_close will still need to be used on the
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* original resource bundle.
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*
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* @param res A pointer to the C resource bundle.
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* @param status A UErrorCode value.
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* @stable ICU 2.0
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*/
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ResourceBundle(UResourceBundle *res,
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UErrorCode &status);
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/**
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* Assignment operator.
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*
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* @param other The resource bundle to copy.
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* @stable ICU 2.0
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*/
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ResourceBundle&
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operator=(const ResourceBundle& other);
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/** Destructor.
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* @stable ICU 2.0
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*/
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virtual ~ResourceBundle();
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/**
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* Clone this object.
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* Clones can be used concurrently in multiple threads.
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* If an error occurs, then NULL is returned.
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* The caller must delete the clone.
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*
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* @return a clone of this object
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*
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* @see getDynamicClassID
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* @stable ICU 2.8
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*/
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ResourceBundle *clone() const;
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/**
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* Returns the size of a resource. Size for scalar types is always 1, and for vector/table types is
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* the number of child resources.
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* @warning Integer array is treated as a scalar type. There are no
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* APIs to access individual members of an integer array. It
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* is always returned as a whole.
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*
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* @return number of resources in a given resource.
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* @stable ICU 2.0
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*/
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int32_t
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getSize(void) const;
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/**
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* returns a string from a string resource type
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*
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* @param status fills in the outgoing error code
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* could be <TT>U_MISSING_RESOURCE_ERROR</TT> if the key is not found
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* could be a warning
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* e.g.: <TT>U_USING_FALLBACK_WARNING</TT>,<TT>U_USING_DEFAULT_WARNING </TT>
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* @return a pointer to a zero-terminated char16_t array which lives in a memory mapped/DLL file.
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* @stable ICU 2.0
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*/
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UnicodeString
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getString(UErrorCode& status) const;
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/**
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* returns a binary data from a resource. Can be used at most primitive resource types (binaries,
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* strings, ints)
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*
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* @param len fills in the length of resulting byte chunk
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* @param status fills in the outgoing error code
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* could be <TT>U_MISSING_RESOURCE_ERROR</TT> if the key is not found
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* could be a warning
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* e.g.: <TT>U_USING_FALLBACK_WARNING</TT>,<TT>U_USING_DEFAULT_WARNING </TT>
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* @return a pointer to a chunk of unsigned bytes which live in a memory mapped/DLL file.
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* @stable ICU 2.0
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*/
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const uint8_t*
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getBinary(int32_t& len, UErrorCode& status) const;
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/**
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* returns an integer vector from a resource.
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*
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* @param len fills in the length of resulting integer vector
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* @param status fills in the outgoing error code
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* could be <TT>U_MISSING_RESOURCE_ERROR</TT> if the key is not found
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* could be a warning
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* e.g.: <TT>U_USING_FALLBACK_WARNING</TT>,<TT>U_USING_DEFAULT_WARNING </TT>
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* @return a pointer to a vector of integers that lives in a memory mapped/DLL file.
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* @stable ICU 2.0
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*/
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const int32_t*
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getIntVector(int32_t& len, UErrorCode& status) const;
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/**
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* returns an unsigned integer from a resource.
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* This integer is originally 28 bits.
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*
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* @param status fills in the outgoing error code
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* could be <TT>U_MISSING_RESOURCE_ERROR</TT> if the key is not found
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* could be a warning
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* e.g.: <TT>U_USING_FALLBACK_WARNING</TT>,<TT>U_USING_DEFAULT_WARNING </TT>
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* @return an unsigned integer value
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* @stable ICU 2.0
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*/
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uint32_t
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getUInt(UErrorCode& status) const;
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/**
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* returns a signed integer from a resource.
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* This integer is originally 28 bit and the sign gets propagated.
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*
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* @param status fills in the outgoing error code
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* could be <TT>U_MISSING_RESOURCE_ERROR</TT> if the key is not found
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* could be a warning
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* e.g.: <TT>U_USING_FALLBACK_WARNING</TT>,<TT>U_USING_DEFAULT_WARNING </TT>
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* @return a signed integer value
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* @stable ICU 2.0
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*/
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int32_t
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getInt(UErrorCode& status) const;
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/**
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* Checks whether the resource has another element to iterate over.
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*
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* @return true if there are more elements, false if there is no more elements
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* @stable ICU 2.0
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*/
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UBool
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hasNext(void) const;
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/**
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* Resets the internal context of a resource so that iteration starts from the first element.
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*
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* @stable ICU 2.0
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*/
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void
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resetIterator(void);
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/**
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* Returns the key associated with this resource. Not all the resources have a key - only
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* those that are members of a table.
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*
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* @return a key associated to this resource, or NULL if it doesn't have a key
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* @stable ICU 2.0
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*/
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const char*
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getKey(void) const;
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/**
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* Gets the locale ID of the resource bundle as a string.
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* Same as getLocale().getName() .
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*
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* @return the locale ID of the resource bundle as a string
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* @stable ICU 2.0
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*/
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const char*
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getName(void) const;
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/**
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* Returns the type of a resource. Available types are defined in enum UResType
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*
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* @return type of the given resource.
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* @stable ICU 2.0
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*/
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UResType
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getType(void) const;
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/**
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* Returns the next resource in a given resource or NULL if there are no more resources
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*
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* @param status fills in the outgoing error code
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* @return ResourceBundle object.
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* @stable ICU 2.0
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*/
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ResourceBundle
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getNext(UErrorCode& status);
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/**
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* Returns the next string in a resource or NULL if there are no more resources
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* to iterate over.
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*
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* @param status fills in the outgoing error code
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* @return an UnicodeString object.
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* @stable ICU 2.0
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*/
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UnicodeString
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getNextString(UErrorCode& status);
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/**
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* Returns the next string in a resource or NULL if there are no more resources
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* to iterate over.
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*
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* @param key fill in for key associated with this string
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* @param status fills in the outgoing error code
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* @return an UnicodeString object.
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* @stable ICU 2.0
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*/
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UnicodeString
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getNextString(const char ** key,
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UErrorCode& status);
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/**
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* Returns the resource in a resource at the specified index.
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*
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* @param index an index to the wanted resource.
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* @param status fills in the outgoing error code
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* @return ResourceBundle object. If there is an error, resource is invalid.
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* @stable ICU 2.0
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*/
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ResourceBundle
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get(int32_t index,
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UErrorCode& status) const;
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/**
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* Returns the string in a given resource at the specified index.
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*
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* @param index an index to the wanted string.
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* @param status fills in the outgoing error code
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* @return an UnicodeString object. If there is an error, string is bogus
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* @stable ICU 2.0
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*/
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UnicodeString
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getStringEx(int32_t index,
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UErrorCode& status) const;
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/**
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* Returns a resource in a resource that has a given key. This procedure works only with table
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* resources.
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*
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* @param key a key associated with the wanted resource
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* @param status fills in the outgoing error code.
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* @return ResourceBundle object. If there is an error, resource is invalid.
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* @stable ICU 2.0
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*/
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ResourceBundle
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get(const char* key,
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UErrorCode& status) const;
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/**
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* Returns a string in a resource that has a given key. This procedure works only with table
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* resources.
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*
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* @param key a key associated with the wanted string
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* @param status fills in the outgoing error code
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* @return an UnicodeString object. If there is an error, string is bogus
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* @stable ICU 2.0
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*/
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UnicodeString
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getStringEx(const char* key,
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UErrorCode& status) const;
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#ifndef U_HIDE_DEPRECATED_API
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/**
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* Return the version number associated with this ResourceBundle as a string. Please
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* use getVersion, as this method is going to be deprecated.
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*
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* @return A version number string as specified in the resource bundle or its parent.
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* The caller does not own this string.
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* @see getVersion
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* @deprecated ICU 2.8 Use getVersion instead.
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*/
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const char*
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getVersionNumber(void) const;
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#endif /* U_HIDE_DEPRECATED_API */
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/**
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* Return the version number associated with this ResourceBundle as a UVersionInfo array.
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*
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* @param versionInfo A UVersionInfo array that is filled with the version number
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* as specified in the resource bundle or its parent.
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* @stable ICU 2.0
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*/
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void
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getVersion(UVersionInfo versionInfo) const;
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#ifndef U_HIDE_DEPRECATED_API
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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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* @deprecated ICU 2.8 Use getLocale(ULocDataLocaleType type, UErrorCode &status) overload instead.
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*/
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const Locale&
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getLocale(void) const;
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#endif /* U_HIDE_DEPRECATED_API */
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/**
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* Return the Locale associated with this ResourceBundle.
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* @param type You can choose between requested, valid and actual
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* locale. For description see the definition of
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* ULocDataLocaleType in uloc.h
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* @param status just for catching illegal arguments
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*
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* @return a Locale object
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* @stable ICU 2.8
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*/
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const Locale
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getLocale(ULocDataLocaleType type, UErrorCode &status) const;
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#ifndef U_HIDE_INTERNAL_API
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/**
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* This API implements multilevel fallback
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* @internal
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*/
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ResourceBundle
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getWithFallback(const char* key, UErrorCode& status);
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#endif /* U_HIDE_INTERNAL_API */
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/**
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* ICU "poor man's RTTI", returns a UClassID for the actual class.
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*
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* @stable ICU 2.2
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*/
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virtual UClassID getDynamicClassID() const override;
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/**
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* ICU "poor man's RTTI", returns a UClassID for this class.
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*
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* @stable ICU 2.2
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*/
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static UClassID U_EXPORT2 getStaticClassID();
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private:
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ResourceBundle() = delete; // default constructor not implemented
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UResourceBundle *fResource;
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void constructForLocale(const UnicodeString& path, const Locale& locale, UErrorCode& error);
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Locale *fLocale;
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};
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U_NAMESPACE_END
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#endif /* U_SHOW_CPLUSPLUS_API */
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#endif
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