575 lines
24 KiB
C
575 lines
24 KiB
C
/*
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**********************************************************************
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* Copyright (C) 1997-1999, 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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* File URES.H (formerly CRESBUND.H)
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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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* 04/01/97 aliu Creation.
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* 02/22/99 damiba overhaul.
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* 04/04/99 helena Fixed internal header inclusion.
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* 04/15/99 Madhu Updated Javadoc
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* 06/14/99 stephen Removed functions taking a filename suffix.
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* 07/20/99 stephen Language-independent ypedef to void*
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* 11/09/99 weiv Added ures_getLocale()
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*******************************************************************************
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*/
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#ifndef URES_H
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#define URES_H
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#include "unicode/utypes.h"
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#include "unicode/uloc.h"
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/**
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* @name ResourceBundle C API
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*
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* C API 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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* 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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* <H2>Usage model:</H2>
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* Resource bundles contain resources. In code, both types of entities are treated the
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* same and are represented with a same data structure <pre>UResourceBundle</pre>.
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* Resource bundle has a tree structure, where leaf nodes can be strings, binaries
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* and integers while non-leaf nodes (including the root node) can be tables and arrays.
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* One or more resource bundles are used to represent data needed by the application
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* for running in the particular locale. Complete set of resource bundles for an application
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* would contain all the data needed to run in intended locales. <P>
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* If the data for the requested locale is missing, an effort will be made to obtain most
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* usable data. This process is called fallback. Also, fallback happens when a resource
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* is not present in the given bundle. Then, the other bundles in the fallback chain are
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* also searched for the requested resource.<P>
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* Retrieving data from resources is possible in several ways, depending on the type of
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* the resources:<P>
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* 1) Access by a key: this approach works only for table resources<P>
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* 2) Access by an index: tables and arrays can be addressed by an index<P>
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* 3) Iteration: works for tables and arrays<P>
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* To use data in resource bundles, following steps are needed:<P>
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* 1) opening a bundle for a particular locale:
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* <pre>
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* UErrorCode status = U_ZERO_ERROR;
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* UResourceBundle* resB = ures_open("/datadir/resources/GUI", "de_AT_EURO", &status);
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* </pre>
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* Status allows, besides testing for plain error, to see whether fallback occured. There
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* are two extra non error values for status after this operation: U_USING_FALLBACK_ERROR,
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* which implies that the bundle for the requested locale was not found, but that one of
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* the bundles in the fallback chain was used (de_AT and de in this case) and
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* U_USING_DEFAULT_ERROR which implies that not one bundle in the fallback chain was found
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* and that default locale was used. In any case, 'root' locale is always at the end of the
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* chain.
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*
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* This is an example for using a possible custom resource:
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* <pre>
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* . const char *currentLocale;
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* . UErrorCode success = U_ZERO_ERROR;
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* . UResourceBundle* myResources=ures_open("MyResources", currentLocale, &success );
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* .
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* . UChar *button1Title, *button2Title;
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* . button1Title= ures_get(myResources, "OkKey", &success );
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* . button2Title= ures_get(myResources, "CancelKey", &success );
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* </pre>
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*/
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/** A UResourceBundle.
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* For usage in C programs.
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*/
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struct UResourceBundle;
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typedef struct UResourceBundle UResourceBundle;
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typedef enum {
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RES_STRING=0,
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RES_BINARY=1,
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RES_TABLE=2,
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RES_INT=7,
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RES_ARRAY=8,
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RES_INT_VECTOR=14,
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RES_RESERVED=15
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} UResType;
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/**
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* Functions to create and destroy resource bundles.
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*/
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/**
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* Opens a UResourceBundle, from which users can extract strings by using
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* their corresponding keys.
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* Note that the caller is responsible of calling <TT>ures_close</TT> on each succesfully
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* opened resource bundle.
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* @param path : string containing the full path pointing to the directory
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* where the resources reside followed by the package name
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* e.g. "/usr/resource/my_app/resources/guimessages" on a Unix system.
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* if NULL, ICU default data files will be used.
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* @param locale: specifies the locale for which we want to open the resource
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* if NULL, the default locale will be used. If strlen(locale) == 0
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* root locale will be used.
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*
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* @param status : fills in the outgoing 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_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 or root locale data was used; neither the requested locale
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* nor any of its fall back locales could be found.
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* @return a newly allocated resource bundle.
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* @see ures_close
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* @draft
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*/
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U_CAPI UResourceBundle* U_EXPORT2 ures_open(const char* path, /* NULL if none */
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const char* locale, /* NULL if none */
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UErrorCode* status);
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/**
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*Opens a UResourceBundle, from which users can extract strings by using
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*their corresponding keys. This version of open requires the path
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*string to be of type <TT>const wchar_t*</TT>.
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*Note that the caller is responsible of calling <TT>ures_close</TT> on each succesfully
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*opened resource bundle.
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*@param path: string containing the full path pointing to the directory
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* where the resources reside (should end with a directory
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* separator.
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* e.g. "/usr/resource/my_app/resources/" on a Unix system
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* if NULL will use the system's current data directory
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*@param locale: specifies the locale for which we want to open the resource
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* if NULL will use the default locale
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*
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*@param status: fills in the outgoing error code.
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*@see ures_close
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*@return : a newly allocated resource bundle.
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*@draft
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*/
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U_CAPI UResourceBundle* U_EXPORT2 ures_openW(const wchar_t* path,
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const char* locale,
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UErrorCode* status);
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U_CAPI UResourceBundle* U_EXPORT2 ures_openU(const UChar* path,
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const char* locale,
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UErrorCode* status);
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/**
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* returns a resource string, given a resource bundle and a key.
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*
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* @param resourceBundle: resourceBundle containing the desired string
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* @param resourceTag: key tagging the desired string
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* @param status: fills in the outgoing error code
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* could be <TT>U_MISSING_RESOURCE_ERROR</T> if the key is not found
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* could be a non-failing error
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* e.g.: <TT>U_USING_FALLBACK_ERROR</TT>,<TT>U_USING_DEFAULT_ERROR </TT>
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* @return a library-owned zero-terminated unicode string (its lifetime
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* is that of the resource bundle.)
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* @see ures_getArrayItem
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* @see ures_get2dArrayItem
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* @see ures_getTaggedItem
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* @deprecated
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*/
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U_CAPI const UChar* U_EXPORT2 ures_get(const UResourceBundle* resourceBundle,
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const char* resourceTag,
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UErrorCode* status);
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/**
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* Returns a resource string which is part of an array, given a resource bundle
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* a key to the array and the index of the desired string.
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*
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* @param resourceBundle: resourceBundle containing the desired string
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* @param resourceTag: key tagging the desired array
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* @param resourceIndex: index of the desired string
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* @param status: fills in the outgoing error code
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* could be <TT>U_MISSING_RESOURCE_ERROR</T> if the key is not found
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* could be a non-failing error
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* e.g.: <TT>U_USING_FALLBACK_ERROR</TT>,<TT>U_USING_DEFAULT_ERROR </TT>
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* @return: a library-owned zero-terminated unicode string (its lifetime
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* is that of the resource bundle.)
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* @see ures_get
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* @see ures_get2dArrayItem
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* @see ures_getTaggedItem
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* @deprecated
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*/
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U_CAPI const UChar* U_EXPORT2 ures_getArrayItem(const UResourceBundle* resourceBundle,
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const char* resourceTag,
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int32_t resourceIndex,
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UErrorCode* status);
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/**
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* Returns a resource string which is part of a 2D array, given a resource bundle
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* a key to the array and the index pair of the desired string.
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*
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* @param resourceBundle: resourceBundle containing the desired string
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* @param resourceTag: key tagging the desired array
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* @param resourceIndex: x index of the desired string
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* @param resourceIndex: y index of the desired string
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* @param status: fills in the outgoing error code
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* could be <TT>U_MISSING_RESOURCE_ERROR</T> if the key is not found
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* could be a non-failing error
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* e.g.: <TT>U_USING_FALLBACK_ERROR</TT>,<TT>U_USING_DEFAULT_ERROR </TT>
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* @return: a library-owned zero-terminated unicode string (its lifetime
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* is that of the resource bundle.)
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* @see ures_get
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* @see ures_getArrayItem
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* @see ures_getTaggedItem
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* @deprecated
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*/
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U_CAPI const UChar* U_EXPORT2 ures_get2dArrayItem(const UResourceBundle* resourceBundle,
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const char* resourceTag,
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int32_t rowIndex,
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int32_t columnIndex,
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UErrorCode* status);
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/**
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* Returns a resource string which is part of a tagged array, given a resource bundle
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* a key to the array and the key of the desired string.
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*
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* @param resourceBundle: resource bundle containing the desired string
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* @param resourceTag: key tagging the desired array
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* @param resourceIndex: key tagging the desired string
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* @param status: fills in the outgoing error code
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* could be <TT>U_MISSING_RESOURCE_ERROR</T> if the key is not found
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* could be a non-failing error
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* e.g.: <TT>U_USING_FALLBACK_ERROR</TT>,<TT>U_USING_DEFAULT_ERROR </TT>
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* @return: a library-owned zero-terminated unicode string (its lifetime
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* is that of the resource bundle.)
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* @see ures_get
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* @see ures_getArrayItem
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* @see ures_get2dItem
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* @deprecated
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*/
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U_CAPI const UChar* U_EXPORT2 ures_getTaggedArrayItem(const UResourceBundle* resourceBundle,
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const char* resourceTag,
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const char* itemTag,
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UErrorCode* status);
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/**
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* Returns the number of strings/arrays in resource bundles.
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*
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*@param resourceBundle: resource bundle containing the desired strings
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*@param resourceKey: key tagging the resource
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*@param err: fills in the outgoing error code
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* could be <TT>U_MISSING_RESOURCE_ERROR</T> if the key is not found
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* could be a non-failing error
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* e.g.: <TT>U_USING_FALLBACK_ERROR</TT>,<TT>U_USING_DEFAULT_ERROR </TT>
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*@return: for <STRONG>Arrays</STRONG>: returns the number of strings in the array
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* <STRONG>2d Arrays</STRONG>: returns the number of 1d arrays
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* <STRONG>taggedArrays</STRONG>: returns the number of strings in the array
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* <STRONG>single string</STRONG>: returns 1
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*@see ures_get
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*@see ures_getArrayItem
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*@see ures_getTaggedArrayItem
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*@see ures_get2dArrayItem
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*@draft
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*/
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U_CAPI int32_t U_EXPORT2 ures_countArrayItems(const UResourceBundle* resourceBundle,
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const char* resourceKey,
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UErrorCode* err);
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/**
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* close a resource bundle, all pointers returned from the various ures_getXXX calls
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* on this particular bundle are INVALID henceforth.
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*
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* @param resourceBundle: a succesfully opened resourceBundle.
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* @param status: fills in the outgoing error code
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* could be <TT>U_MISSING_RESOURCE_ERROR</T> if the key is not found
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* could be a non-failing error
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* e.g.: <TT>U_USING_FALLBACK_ERROR</TT>,<TT>U_USING_DEFAULT_ERROR </TT>
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* @see ures_open
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* @see ures_openW
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* @draft
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*/
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U_CAPI void U_EXPORT2 ures_close(UResourceBundle* resourceBundle);
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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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* 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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* @param resourceBundle: resource bundle in question
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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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* @draft
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*/
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U_CAPI const char* U_EXPORT2 ures_getVersionNumber(const UResourceBundle* resourceBundle);
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U_CAPI void U_EXPORT2 ures_getVersion(const UResourceBundle* resB, UVersionInfo versionInfo);
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/**
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* Return the name of the Locale associated with this ResourceBundle.
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* @param resourceBundle: resource bundle in question
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* @param status: just for catching illegal arguments
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* @return A Locale name
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* @draft
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*/
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U_CAPI const char* ures_getLocale(const UResourceBundle* resourceBundle, UErrorCode* status);
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/** New API */
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U_CAPI void ures_openFillIn(UResourceBundle *r, const char* path,
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const char* localeID, UErrorCode* status);
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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 resourceBundle: a string resource
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* @param len: fills in the length of resulting string
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* @param status: fills in the outgoing error code
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* could be <TT>U_MISSING_RESOURCE_ERROR</T> if the key is not found
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* could be a non-failing error
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* e.g.: <TT>U_USING_FALLBACK_ERROR</TT>,<TT>U_USING_DEFAULT_ERROR </TT>
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* @return a pointer to a zero-terminated UChar array which lives in a memory mapped/DLL file.
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* @draft
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*/
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U_CAPI const UChar* U_EXPORT2 ures_getString(const UResourceBundle* resourceBundle, int32_t* len,
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UErrorCode* status);
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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 resourceBundle: a string resource
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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</T> if the key is not found
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* could be a non-failing error
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* e.g.: <TT>U_USING_FALLBACK_ERROR</TT>,<TT>U_USING_DEFAULT_ERROR </TT>
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* @return a pointer to a chuck of unsigned bytes which live in a memory mapped/DLL file.
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* @draft
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*/
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U_CAPI const uint8_t* U_EXPORT2 ures_getBinary(const UResourceBundle* resourceBundle, int32_t* len,
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UErrorCode* status);
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/**
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* returns an integer from a resource.
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*
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* @param resourceBundle: a string resource
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* @param status: fills in the outgoing error code
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* could be <TT>U_MISSING_RESOURCE_ERROR</T> if the key is not found
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* could be a non-failing error
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* e.g.: <TT>U_USING_FALLBACK_ERROR</TT>,<TT>U_USING_DEFAULT_ERROR </TT>
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* @return an integer value
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* @draft
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*/
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U_CAPI uint32_t U_EXPORT2 ures_getInt(const UResourceBundle* resourceBundle, UErrorCode *status);
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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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*
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* @param resourceBundle: a resource
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* @return number of resources in a given resource.
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* @draft
|
|
*/
|
|
U_CAPI int32_t U_EXPORT2 ures_getSize(UResourceBundle *resourceBundle);
|
|
|
|
/**
|
|
* Returns the type of a resource. Available types are defined in enum UResType
|
|
*
|
|
* @param resourceBundle: a resource
|
|
* @return type of the given resource.
|
|
* @draft
|
|
*/
|
|
U_CAPI UResType U_EXPORT2 ures_getType(UResourceBundle *resourceBundle);
|
|
|
|
/**
|
|
* Returns the key associated with a given resource. Not all the resources have a key - only
|
|
* those that are members of a table.
|
|
*
|
|
* @param resourceBundle: a resource
|
|
* @return a key associated to this resource, or NULL if it doesn't have a key
|
|
* @draft
|
|
*/
|
|
U_CAPI const char * U_EXPORT2 ures_getKey(UResourceBundle *resB);
|
|
|
|
/* ITERATION API
|
|
This API provides means for iterating through a resource
|
|
*/
|
|
|
|
/**
|
|
* Resets the internal context of a resource so that iteration starts from the first element.
|
|
*
|
|
* @param resourceBundle: a resource
|
|
* @draft
|
|
*/
|
|
U_CAPI void U_EXPORT2 ures_resetIterator(UResourceBundle *resourceBundle);
|
|
|
|
/**
|
|
* Checks whether the given resource has another element to iterate over.
|
|
*
|
|
* @param resourceBundle a resource
|
|
* @return TRUE if there are more elements, FALSE if there is no more elements
|
|
* @draft
|
|
*/
|
|
U_CAPI UBool U_EXPORT2 ures_hasNext(UResourceBundle *resourceBundle);
|
|
|
|
/**
|
|
* Returns the next resource in a given resource or NULL if there are no more resources
|
|
* to iterate over. Features a fill-in parameter.
|
|
*
|
|
* @param resourceBundle a resource
|
|
* @param fillIn if NULL a new UResourceBundle struct is allocated and must be deleted by the caller.
|
|
* Alternatively, you can supply a struct to be filled by this function.
|
|
* @param status fills in the outgoing error code
|
|
* @return a pointer to a UResourceBundle struct. If fill in param was NULL, caller must delete it
|
|
* @draft
|
|
*/
|
|
U_CAPI UResourceBundle* U_EXPORT2 ures_getNextResource(UResourceBundle *resourceBundle, UResourceBundle *fillIn, UErrorCode *status);
|
|
|
|
/**
|
|
* Returns the next string in a given resource or NULL if there are no more resources
|
|
* to iterate over.
|
|
*
|
|
* @param resourceBundle a resource
|
|
* @param len fill in length of the string
|
|
* @param key fill in for key associated with this string
|
|
* @param status fills in the outgoing error code
|
|
* @return a pointer to a zero-terminated UChar array which lives in a memory mapped/DLL file.
|
|
* @draft
|
|
*/
|
|
U_CAPI const UChar* U_EXPORT2 ures_getNextString(UResourceBundle *resourceBundle, int32_t* len, const char ** key, UErrorCode *status);
|
|
|
|
/**
|
|
* Returns the resource in a given resource at the specified index. Features a fill-in parameter.
|
|
*
|
|
* @param resourceBundle a resource
|
|
* @param indexR an index to the wanted resource.
|
|
* @param fillIn if NULL a new UResourceBundle struct is allocated and must be deleted by the caller.
|
|
* Alternatively, you can supply a struct to be filled by this function.
|
|
* @param status fills in the outgoing error code
|
|
* @return a pointer to a UResourceBundle struct. If fill in param was NULL, caller must delete it
|
|
* @draft
|
|
*/
|
|
U_CAPI UResourceBundle* U_EXPORT2 ures_getByIndex(const UResourceBundle *resourceBundle, int32_t indexR, UResourceBundle *fillIn, UErrorCode *status);
|
|
|
|
/**
|
|
* Returns the string in a given resource at the specified index.
|
|
*
|
|
* @param resourceBundle a resource
|
|
* @param indexS an index to the wanted string.
|
|
* @param len fill in length of the string
|
|
* @param status fills in the outgoing error code
|
|
* @return a pointer to a zero-terminated UChar array which lives in a memory mapped/DLL file.
|
|
* @draft
|
|
*/
|
|
U_CAPI const UChar* U_EXPORT2 ures_getStringByIndex(const UResourceBundle *resB, int32_t indexS, int32_t* len, UErrorCode *status);
|
|
|
|
/**
|
|
* Returns a resource in a given resource that has a given key. This procedure works only with table
|
|
* resources. Features a fill-in parameter.
|
|
*
|
|
* @param resourceBundle a resource
|
|
* @param key a key associated with the wanted resource
|
|
* @param fillIn if NULL a new UResourceBundle struct is allocated and must be deleted by the caller.
|
|
* Alternatively, you can supply a struct to be filled by this function.
|
|
* @param status fills in the outgoing error code.
|
|
* @return a pointer to a UResourceBundle struct. If fill in param was NULL, caller must delete it
|
|
* @draft
|
|
*/
|
|
U_CAPI UResourceBundle* U_EXPORT2 ures_getByKey(const UResourceBundle *resourceBundle, const char* key, UResourceBundle *fillIn, UErrorCode *status);
|
|
|
|
/**
|
|
* Returns a string in a given resource that has a given key. This procedure works only with table
|
|
* resources.
|
|
*
|
|
* @param resourceBundle a resource
|
|
* @param key a key associated with the wanted string
|
|
* @param len fill in length of the string
|
|
* @param status fills in the outgoing error code
|
|
* @return a pointer to a zero-terminated UChar array which lives in a memory mapped/DLL file.
|
|
* @draft
|
|
*/
|
|
U_CAPI const UChar* U_EXPORT2 ures_getStringByKey(const UResourceBundle *resB, const char* key, int32_t* len, UErrorCode *status);
|
|
|
|
U_CFUNC const char* ures_getName(const UResourceBundle* resB);
|
|
U_CFUNC const char* ures_getPath(const UResourceBundle* resB);
|
|
U_CFUNC const char* ures_getTag(const UResourceBundle* resB);
|
|
|
|
#endif /*_URES*/
|
|
/*eof*/
|