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 // © 2016 and later: Unicode, Inc. and others.
 // License & terms of use: http://www.unicode.org/copyright.html
 /*
 **********************************************************************
 *   Copyright (C) 1997-2016, International Business Machines
 *   Corporation and others.  All Rights Reserved.
 **********************************************************************
 *
 * File URES.H (formerly CRESBUND.H)
 *
 * Modification History:
 *
 *   Date        Name        Description
 *   04/01/97    aliu        Creation.
 *   02/22/99    damiba      overhaul.
 *   04/04/99    helena      Fixed internal header inclusion.
 *   04/15/99    Madhu       Updated Javadoc
 *   06/14/99    stephen     Removed functions taking a filename suffix.
 *   07/20/99    stephen     Language-independent typedef to void*
 *   11/09/99    weiv        Added ures_getLocale()
 *   06/24/02    weiv        Added support for resource sharing
 ******************************************************************************
 */
 
 #ifndef URES_H
 #define URES_H
 
 #include "unicode/char16ptr.h"
 #include "unicode/utypes.h"
 #include "unicode/uloc.h"
 
 #if U_SHOW_CPLUSPLUS_API
 #include "unicode/localpointer.h"
 #endif   // U_SHOW_CPLUSPLUS_API
 
 /**
  * \file
  * \brief C API: Resource Bundle
  *
  * <h2>C API: Resource Bundle</h2>
  *
  * C API representing a collection of resource information pertaining to a given
  * locale. A resource bundle provides a way of accessing locale- specific information in
  * a data file. You create a resource bundle that manages the resources for a given
  * locale and then ask it for individual resources.
  * <P>
  * Resource bundles in ICU4C are currently defined using text files which conform to the following
  * <a href="https://github.com/unicode-org/icu-docs/blob/main/design/bnf_rb.txt">BNF definition</a>.
  * More on resource bundle concepts and syntax can be found in the
  * <a href="https://unicode-org.github.io/icu/userguide/locale/resources">Users Guide</a>.
  * <P>
  */
 
 /**
  * UResourceBundle is an opaque type for handles for resource bundles in C APIs.
  * @stable ICU 2.0
  */
 struct UResourceBundle;
 
 /**
  * @stable ICU 2.0
  */
 typedef struct UResourceBundle UResourceBundle;
 
 /**
  * Numeric constants for types of resource items.
  * @see ures_getType
  * @stable ICU 2.0
  */
 typedef enum {
     /** Resource type constant for "no resource". @stable ICU 2.6 */
     URES_NONE=-1,
 
     /** Resource type constant for 16-bit Unicode strings. @stable ICU 2.6 */
     URES_STRING=0,
 
     /** Resource type constant for binary data. @stable ICU 2.6 */
     URES_BINARY=1,
 
     /** Resource type constant for tables of key-value pairs. @stable ICU 2.6 */
     URES_TABLE=2,
 
     /**
      * Resource type constant for aliases;
      * internally stores a string which identifies the actual resource
      * storing the data (can be in a different resource bundle).
      * Resolved internally before delivering the actual resource through the API.
      * @stable ICU 2.6
      */
     URES_ALIAS=3,
 
     /**
      * Resource type constant for a single 28-bit integer, interpreted as
      * signed or unsigned by the ures_getInt() or ures_getUInt() function.
      * @see ures_getInt
      * @see ures_getUInt
      * @stable ICU 2.6
      */
     URES_INT=7,
 
     /** Resource type constant for arrays of resources. @stable ICU 2.6 */
     URES_ARRAY=8,
 
     /**
      * Resource type constant for vectors of 32-bit integers.
      * @see ures_getIntVector
      * @stable ICU 2.6
      */
     URES_INT_VECTOR = 14,
 #ifndef U_HIDE_DEPRECATED_API
     /** @deprecated ICU 2.6 Use the URES_ constant instead. */
     RES_NONE=URES_NONE,
     /** @deprecated ICU 2.6 Use the URES_ constant instead. */
     RES_STRING=URES_STRING,
     /** @deprecated ICU 2.6 Use the URES_ constant instead. */
     RES_BINARY=URES_BINARY,
     /** @deprecated ICU 2.6 Use the URES_ constant instead. */
     RES_TABLE=URES_TABLE,
     /** @deprecated ICU 2.6 Use the URES_ constant instead. */
     RES_ALIAS=URES_ALIAS,
     /** @deprecated ICU 2.6 Use the URES_ constant instead. */
     RES_INT=URES_INT,
     /** @deprecated ICU 2.6 Use the URES_ constant instead. */
     RES_ARRAY=URES_ARRAY,
     /** @deprecated ICU 2.6 Use the URES_ constant instead. */
     RES_INT_VECTOR=URES_INT_VECTOR,
     /** @deprecated ICU 2.6 Not used. */
     RES_RESERVED=15,
 
     /**
      * One more than the highest normal UResType value.
      * @deprecated ICU 58 The numeric value may change over time, see ICU ticket #12420.
      */
     URES_LIMIT = 16
 #endif  // U_HIDE_DEPRECATED_API
 } UResType;
 
 /*
  * Functions to create and destroy resource bundles.
  */
 
 /**
  * Opens a UResourceBundle, from which users can extract strings by using
  * their corresponding keys.
  * Note that the caller is responsible of calling <TT>ures_close</TT> on each successfully
  * opened resource bundle.
  * @param packageName   The packageName and locale together point to an ICU udata object,
  *                      as defined by <code> udata_open( packageName, "res", locale, err) </code>
  *                      or equivalent.  Typically, packageName will refer to a (.dat) file, or to
  *                      a package registered with udata_setAppData(). Using a full file or directory
  *                      pathname for packageName is deprecated. If NULL, ICU data will be used.
  * @param locale  specifies the locale for which we want to open the resource
  *                if NULL, the default locale will be used. If strlen(locale) == 0
  *                root locale will be used.
  *
  * @param status  fills in the outgoing error code.
  * The UErrorCode err parameter is used to return status information to the user. To
  * check whether the construction succeeded or not, you should check the value of
  * U_SUCCESS(err). If you wish more detailed information, you can check for
  * informational status results which still indicate success. U_USING_FALLBACK_WARNING
  * indicates that a fall back locale was used. For example, 'de_CH' was requested,
  * but nothing was found there, so 'de' was used. U_USING_DEFAULT_WARNING indicates that
  * the default locale data or root locale data was used; neither the requested locale
  * nor any of its fall back locales could be found. Please see the users guide for more
  * information on this topic.
  * @return      a newly allocated resource bundle.
  * @see ures_close
  * @stable ICU 2.0
  */
 U_CAPI UResourceBundle*  U_EXPORT2
 ures_open(const char*    packageName,
           const char*  locale,
           UErrorCode*     status);
 
 
 /** This function does not care what kind of localeID is passed in. It simply opens a bundle with
  *  that name. Fallback mechanism is disabled for the new bundle. If the requested bundle contains
  *  an %%ALIAS directive, the results are undefined.
  * @param packageName   The packageName and locale together point to an ICU udata object,
  *                      as defined by <code> udata_open( packageName, "res", locale, err) </code>
  *                      or equivalent.  Typically, packageName will refer to a (.dat) file, or to
  *                      a package registered with udata_setAppData(). Using a full file or directory
  *                      pathname for packageName is deprecated. If NULL, ICU data will be used.
  * @param locale  specifies the locale for which we want to open the resource
  *                if NULL, the default locale will be used. If strlen(locale) == 0
  *                root locale will be used.
  *
  * @param status fills in the outgoing error code. Either U_ZERO_ERROR or U_MISSING_RESOURCE_ERROR
  * @return      a newly allocated resource bundle or NULL if it doesn't exist.
  * @see ures_close
  * @stable ICU 2.0
  */
 U_CAPI UResourceBundle* U_EXPORT2
 ures_openDirect(const char* packageName,
                 const char* locale,
                 UErrorCode* status);
 
 /**
  * Same as ures_open() but takes a const UChar *path.
  * This path will be converted to char * using the default converter,
  * then ures_open() is called.
  *
  * @param packageName   The packageName and locale together point to an ICU udata object,
  *                      as defined by <code> udata_open( packageName, "res", locale, err) </code>
  *                      or equivalent.  Typically, packageName will refer to a (.dat) file, or to
  *                      a package registered with udata_setAppData(). Using a full file or directory
  *                      pathname for packageName is deprecated. If NULL, ICU data will be used.
  * @param locale  specifies the locale for which we want to open the resource
  *                if NULL, the default locale will be used. If strlen(locale) == 0
  *                root locale will be used.
  * @param status  fills in the outgoing error code.
  * @return      a newly allocated resource bundle.
  * @see ures_open
  * @stable ICU 2.0
  */
 U_CAPI UResourceBundle* U_EXPORT2
 ures_openU(const UChar* packageName,
            const char* locale,
            UErrorCode* status);
 
 #ifndef U_HIDE_DEPRECATED_API
 /**
  * Returns the number of strings/arrays in resource bundles.
  * Better to use ures_getSize, as this function will be deprecated.
  *
  *@param resourceBundle resource bundle containing the desired strings
  *@param resourceKey key tagging the resource
  *@param err fills in the outgoing error code
  *                could be <TT>U_MISSING_RESOURCE_ERROR</TT> if the key is not found
  *                could be a non-failing error
  *                e.g.: <TT>U_USING_FALLBACK_WARNING</TT>,<TT>U_USING_FALLBACK_WARNING </TT>
  *@return: for    <STRONG>Arrays</STRONG>: returns the number of resources in the array
  *                <STRONG>Tables</STRONG>: returns the number of resources in the table
  *                <STRONG>single string</STRONG>: returns 1
  *@see ures_getSize
  * @deprecated ICU 2.8 User ures_getSize instead
  */
 U_DEPRECATED int32_t U_EXPORT2
 ures_countArrayItems(const UResourceBundle* resourceBundle,
                      const char* resourceKey,
                      UErrorCode* err);
 #endif  /* U_HIDE_DEPRECATED_API */
 
 /**
  * Close a resource bundle, all pointers returned from the various ures_getXXX calls
  * on this particular bundle should be considered invalid henceforth.
  *
  * @param resourceBundle a pointer to a resourceBundle struct. Can be NULL.
  * @see ures_open
  * @stable ICU 2.0
  */
 U_CAPI void U_EXPORT2
 ures_close(UResourceBundle* resourceBundle);
 
 #if U_SHOW_CPLUSPLUS_API
 
 U_NAMESPACE_BEGIN
 
 /**
  * \class LocalUResourceBundlePointer
  * "Smart pointer" class, closes a UResourceBundle via ures_close().
  * For most methods see the LocalPointerBase base class.
  *
  * @see LocalPointerBase
  * @see LocalPointer
  * @stable ICU 4.4
  */
 U_DEFINE_LOCAL_OPEN_POINTER(LocalUResourceBundlePointer, UResourceBundle, ures_close);
 
 U_NAMESPACE_END
 
 #endif
 
 #ifndef U_HIDE_DEPRECATED_API
 /**
  * Return the version number associated with this ResourceBundle as a string. Please
  * use ures_getVersion as this function is going to be deprecated.
  *
  * @param resourceBundle The resource bundle for which the version is checked.
  * @return  A version number string as specified in the resource bundle or its parent.
  *          The caller does not own this string.
  * @see ures_getVersion
  * @deprecated ICU 2.8 Use ures_getVersion instead.
  */
 U_DEPRECATED const char* U_EXPORT2
 ures_getVersionNumber(const UResourceBundle*   resourceBundle);
 #endif  /* U_HIDE_DEPRECATED_API */
 
 /**
  * Return the version number associated with this ResourceBundle as an
  * UVersionInfo array.
  *
  * @param resB The resource bundle for which the version is checked.
  * @param versionInfo A UVersionInfo array that is filled with the version number
  *                    as specified in the resource bundle or its parent.
  * @stable ICU 2.0
  */
 U_CAPI void U_EXPORT2
 ures_getVersion(const UResourceBundle* resB,
                 UVersionInfo versionInfo);
 
 #ifndef U_HIDE_DEPRECATED_API
 /**
  * Return the name of the Locale associated with this ResourceBundle. This API allows
  * you to query for the real locale of the resource. For example, if you requested
  * "en_US_CALIFORNIA" and only "en_US" bundle exists, "en_US" will be returned.
  * For subresources, the locale where this resource comes from will be returned.
  * If fallback has occurred, getLocale will reflect this.
  *
  * @param resourceBundle resource bundle in question
  * @param status just for catching illegal arguments
  * @return  A Locale name
  * @deprecated ICU 2.8 Use ures_getLocaleByType instead.
  */
 U_DEPRECATED const char* U_EXPORT2
 ures_getLocale(const UResourceBundle* resourceBundle,
                UErrorCode* status);
 #endif  /* U_HIDE_DEPRECATED_API */
 
 /**
  * Return the name of the Locale associated with this ResourceBundle.
  * You can choose between requested, valid and real locale.
  *
  * @param resourceBundle resource bundle in question
  * @param type You can choose between requested, valid and actual
  *             locale. For description see the definition of
  *             ULocDataLocaleType in uloc.h
  * @param status just for catching illegal arguments
  * @return  A Locale name
  * @stable ICU 2.8
  */
 U_CAPI const char* U_EXPORT2
 ures_getLocaleByType(const UResourceBundle* resourceBundle,
                      ULocDataLocaleType type,
                      UErrorCode* status);
 
 
 #ifndef U_HIDE_INTERNAL_API
 /**
  * Same as ures_open() but uses the fill-in parameter instead of allocating a new bundle.
  *
  * TODO need to revisit usefulness of this function
  *      and usage model for fillIn parameters without knowing sizeof(UResourceBundle)
  * @param r The existing UResourceBundle to fill in. If NULL then status will be
  *               set to U_ILLEGAL_ARGUMENT_ERROR.
  * @param packageName   The packageName and locale together point to an ICU udata object,
  *                      as defined by <code> udata_open( packageName, "res", locale, err) </code>
  *                      or equivalent.  Typically, packageName will refer to a (.dat) file, or to
  *                      a package registered with udata_setAppData(). Using a full file or directory
  *                      pathname for packageName is deprecated. If NULL, ICU data will be used.
  * @param localeID specifies the locale for which we want to open the resource
  * @param status The error code.
  * @internal
  */
 U_CAPI void U_EXPORT2
 ures_openFillIn(UResourceBundle *r,
                 const char* packageName,
                 const char* localeID,
                 UErrorCode* status);
 #endif  /* U_HIDE_INTERNAL_API */
 
 /**
  * Returns a string from a string resource type
  *
  * @param resourceBundle a string resource
  * @param len    fills in the length of resulting string
  * @param status fills in the outgoing error code
  *                could be <TT>U_MISSING_RESOURCE_ERROR</TT> if the key is not found
  *                Always check the value of status. Don't count on returning NULL.
  *                could be a non-failing error
  *                e.g.: <TT>U_USING_FALLBACK_WARNING</TT>,<TT>U_USING_DEFAULT_WARNING </TT>
  * @return a pointer to a zero-terminated UChar array which lives in a memory mapped/DLL file.
  * @see ures_getBinary
  * @see ures_getIntVector
  * @see ures_getInt
  * @see ures_getUInt
  * @stable ICU 2.0
  */
 U_CAPI const UChar* U_EXPORT2
 ures_getString(const UResourceBundle* resourceBundle,
                int32_t* len,
                UErrorCode* status);
 
 /**
  * Returns a UTF-8 string from a string resource.
  * The UTF-8 string may be returnable directly as a pointer, or
  * it may need to be copied, or transformed from UTF-16 using u_strToUTF8()
  * or equivalent.
  *
  * If forceCopy==true, then the string is always written to the dest buffer
  * and dest is returned.
  *
  * If forceCopy==false, then the string is returned as a pointer if possible,
  * without needing a dest buffer (it can be NULL). If the string needs to be
  * copied or transformed, then it may be placed into dest at an arbitrary offset.
  *
  * If the string is to be written to dest, then U_BUFFER_OVERFLOW_ERROR and
  * U_STRING_NOT_TERMINATED_WARNING are set if appropriate, as usual.
  *
  * If the string is transformed from UTF-16, then a conversion error may occur
  * if an unpaired surrogate is encountered. If the function is successful, then
  * the output UTF-8 string is always well-formed.
  *
  * @param resB Resource bundle.
  * @param dest Destination buffer. Can be NULL only if capacity=*length==0.
  * @param length Input: Capacity of destination buffer.
  *               Output: Actual length of the UTF-8 string, not counting the
  *               terminating NUL, even in case of U_BUFFER_OVERFLOW_ERROR.
  *               Can be NULL, meaning capacity=0 and the string length is not
  *               returned to the caller.
  * @param forceCopy If true, then the output string will always be written to
  *                  dest, with U_BUFFER_OVERFLOW_ERROR and
  *                  U_STRING_NOT_TERMINATED_WARNING set if appropriate.
  *                  If false, then the dest buffer may or may not contain a
  *                  copy of the string. dest may or may not be modified.
  *                  If a copy needs to be written, then the UErrorCode parameter
  *                  indicates overflow etc. as usual.
  * @param status Pointer to a standard ICU error code. Its input value must
  *               pass the U_SUCCESS() test, or else the function returns
  *               immediately. Check for U_FAILURE() on output or use with
  *               function chaining. (See User Guide for details.)
  * @return The pointer to the UTF-8 string. It may be dest, or at some offset
  *         from dest (only if !forceCopy), or in unrelated memory.
  *         Always NUL-terminated unless the string was written to dest and
  *         length==capacity (in which case U_STRING_NOT_TERMINATED_WARNING is set).
  *
  * @see ures_getString
  * @see u_strToUTF8
  * @stable ICU 3.6
  */
 U_CAPI const char * U_EXPORT2
 ures_getUTF8String(const UResourceBundle *resB,
                    char *dest, int32_t *length,
                    UBool forceCopy,
                    UErrorCode *status);
 
 /**
  * Returns a binary data from a binary resource.
  *
  * @param resourceBundle a string resource
  * @param len    fills in the length of resulting byte chunk
  * @param status fills in the outgoing error code
  *                could be <TT>U_MISSING_RESOURCE_ERROR</TT> if the key is not found
  *                Always check the value of status. Don't count on returning NULL.
  *                could be a non-failing error
  *                e.g.: <TT>U_USING_FALLBACK_WARNING</TT>,<TT>U_USING_DEFAULT_WARNING </TT>
  * @return a pointer to a chunk of unsigned bytes which live in a memory mapped/DLL file.
  * @see ures_getString
  * @see ures_getIntVector
  * @see ures_getInt
  * @see ures_getUInt
  * @stable ICU 2.0
  */
 U_CAPI const uint8_t* U_EXPORT2
 ures_getBinary(const UResourceBundle* resourceBundle,
                int32_t* len,
                UErrorCode* status);
 
 /**
  * Returns a 32 bit integer array from a resource.
  *
  * @param resourceBundle an int vector resource
  * @param len    fills in the length of resulting byte chunk
  * @param status fills in the outgoing error code
  *                could be <TT>U_MISSING_RESOURCE_ERROR</TT> if the key is not found
  *                Always check the value of status. Don't count on returning NULL.
  *                could be a non-failing error
  *                e.g.: <TT>U_USING_FALLBACK_WARNING</TT>,<TT>U_USING_DEFAULT_WARNING </TT>
  * @return a pointer to a chunk of integers which live in a memory mapped/DLL file.
  * @see ures_getBinary
  * @see ures_getString
  * @see ures_getInt
  * @see ures_getUInt
  * @stable ICU 2.0
  */
 U_CAPI const int32_t* U_EXPORT2
 ures_getIntVector(const UResourceBundle* resourceBundle,
                   int32_t* len,
                   UErrorCode* status);
 
 /**
  * Returns an unsigned integer from a resource.
  * This integer is originally 28 bits.
  *
  * @param resourceBundle a string resource
  * @param status fills in the outgoing error code
  *                could be <TT>U_MISSING_RESOURCE_ERROR</TT> if the key is not found
  *                could be a non-failing error
  *                e.g.: <TT>U_USING_FALLBACK_WARNING</TT>,<TT>U_USING_DEFAULT_WARNING </TT>
  * @return an integer value
  * @see ures_getInt
  * @see ures_getIntVector
  * @see ures_getBinary
  * @see ures_getString
  * @stable ICU 2.0
  */
 U_CAPI uint32_t U_EXPORT2
 ures_getUInt(const UResourceBundle* resourceBundle,
              UErrorCode *status);
 
 /**
  * Returns a signed integer from a resource.
  * This integer is originally 28 bit and the sign gets propagated.
  *
  * @param resourceBundle a string resource
  * @param status  fills in the outgoing error code
  *                could be <TT>U_MISSING_RESOURCE_ERROR</TT> if the key is not found
  *                could be a non-failing error
  *                e.g.: <TT>U_USING_FALLBACK_WARNING</TT>,<TT>U_USING_DEFAULT_WARNING </TT>
  * @return an integer value
  * @see ures_getUInt
  * @see ures_getIntVector
  * @see ures_getBinary
  * @see ures_getString
  * @stable ICU 2.0
  */
 U_CAPI int32_t U_EXPORT2
 ures_getInt(const UResourceBundle* resourceBundle,
             UErrorCode *status);
 
 /**
  * Returns the size of a resource. Size for scalar types is always 1,
  * and for vector/table types is the number of child resources.
  * @warning Integer array is treated as a scalar type. There are no
  *          APIs to access individual members of an integer array. It
  *          is always returned as a whole.
  * @param resourceBundle a resource
  * @return number of resources in a given resource.
  * @stable ICU 2.0
  */
 U_CAPI int32_t U_EXPORT2
 ures_getSize(const 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.
  * @see UResType
  * @stable ICU 2.0
  */
 U_CAPI UResType U_EXPORT2
 ures_getType(const 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
  * @stable ICU 2.0
  */
 U_CAPI const char * U_EXPORT2
 ures_getKey(const UResourceBundle *resourceBundle);
 
 /* 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
  * @stable ICU 2.0
  */
 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
  * @stable ICU 2.0
  */
 U_CAPI UBool U_EXPORT2
 ures_hasNext(const 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 closed by the caller.
  *                          Alternatively, you can supply a struct to be filled by this function.
  * @param status            fills in the outgoing error code. You may still get a non NULL result even if an
  *                          error occurred. Check status instead.
  * @return                  a pointer to a UResourceBundle struct. If fill in param was NULL, caller must close it
  * @stable ICU 2.0
  */
 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. NULL if no key
  * @param status            fills in the outgoing error code. If an error occurred, we may return NULL, but don't
  *                          count on it. Check status instead!
  * @return a pointer to a zero-terminated UChar array which lives in a memory mapped/DLL file.
  * @stable ICU 2.0
  */
 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    the resource bundle from which to get a sub-resource
  * @param indexR            an index to the wanted resource.
  * @param fillIn            if NULL a new UResourceBundle struct is allocated and must be closed by the caller.
  *                          Alternatively, you can supply a struct to be filled by this function.
  * @param status            fills in the outgoing error code. Don't count on NULL being returned if an error has
  *                          occurred. Check status instead.
  * @return                  a pointer to a UResourceBundle struct. If fill in param was NULL, caller must close it
  * @stable ICU 2.0
  */
 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. If an error occurred, we may return NULL, but don't
  *                          count on it. Check status instead!
  * @return                  a pointer to a zero-terminated UChar array which lives in a memory mapped/DLL file.
  * @stable ICU 2.0
  */
 U_CAPI const UChar* U_EXPORT2
 ures_getStringByIndex(const UResourceBundle *resourceBundle,
                       int32_t indexS,
                       int32_t* len,
                       UErrorCode *status);
 
 /**
  * Returns a UTF-8 string from a resource at the specified index.
  * The UTF-8 string may be returnable directly as a pointer, or
  * it may need to be copied, or transformed from UTF-16 using u_strToUTF8()
  * or equivalent.
  *
  * If forceCopy==true, then the string is always written to the dest buffer
  * and dest is returned.
  *
  * If forceCopy==false, then the string is returned as a pointer if possible,
  * without needing a dest buffer (it can be NULL). If the string needs to be
  * copied or transformed, then it may be placed into dest at an arbitrary offset.
  *
  * If the string is to be written to dest, then U_BUFFER_OVERFLOW_ERROR and
  * U_STRING_NOT_TERMINATED_WARNING are set if appropriate, as usual.
  *
  * If the string is transformed from UTF-16, then a conversion error may occur
  * if an unpaired surrogate is encountered. If the function is successful, then
  * the output UTF-8 string is always well-formed.
  *
  * @param resB Resource bundle.
  * @param stringIndex An index to the wanted string.
  * @param dest Destination buffer. Can be NULL only if capacity=*length==0.
  * @param pLength Input: Capacity of destination buffer.
  *               Output: Actual length of the UTF-8 string, not counting the
  *               terminating NUL, even in case of U_BUFFER_OVERFLOW_ERROR.
  *               Can be NULL, meaning capacity=0 and the string length is not
  *               returned to the caller.
  * @param forceCopy If true, then the output string will always be written to
  *                  dest, with U_BUFFER_OVERFLOW_ERROR and
  *                  U_STRING_NOT_TERMINATED_WARNING set if appropriate.
  *                  If false, then the dest buffer may or may not contain a
  *                  copy of the string. dest may or may not be modified.
  *                  If a copy needs to be written, then the UErrorCode parameter
  *                  indicates overflow etc. as usual.
  * @param status Pointer to a standard ICU error code. Its input value must
  *               pass the U_SUCCESS() test, or else the function returns
  *               immediately. Check for U_FAILURE() on output or use with
  *               function chaining. (See User Guide for details.)
  * @return The pointer to the UTF-8 string. It may be dest, or at some offset
  *         from dest (only if !forceCopy), or in unrelated memory.
  *         Always NUL-terminated unless the string was written to dest and
  *         length==capacity (in which case U_STRING_NOT_TERMINATED_WARNING is set).
  *
  * @see ures_getStringByIndex
  * @see u_strToUTF8
  * @stable ICU 3.6
  */
 U_CAPI const char * U_EXPORT2
 ures_getUTF8StringByIndex(const UResourceBundle *resB,
                           int32_t stringIndex,
                           char *dest, int32_t *pLength,
                           UBool forceCopy,
                           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 closed 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 close it
  * @stable ICU 2.0
  */
 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 resB              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. If an error occurred, we may return NULL, but don't
  *                          count on it. Check status instead!
  * @return                  a pointer to a zero-terminated UChar array which lives in a memory mapped/DLL file.
  * @stable ICU 2.0
  */
 U_CAPI const UChar* U_EXPORT2
 ures_getStringByKey(const UResourceBundle *resB,
                     const char* key,
                     int32_t* len,
                     UErrorCode *status);
 
 /**
  * Returns a UTF-8 string from a resource and a key.
  * This function works only with table resources.
  *
  * The UTF-8 string may be returnable directly as a pointer, or
  * it may need to be copied, or transformed from UTF-16 using u_strToUTF8()
  * or equivalent.
  *
  * If forceCopy==true, then the string is always written to the dest buffer
  * and dest is returned.
  *
  * If forceCopy==false, then the string is returned as a pointer if possible,
  * without needing a dest buffer (it can be NULL). If the string needs to be
  * copied or transformed, then it may be placed into dest at an arbitrary offset.
  *
  * If the string is to be written to dest, then U_BUFFER_OVERFLOW_ERROR and
  * U_STRING_NOT_TERMINATED_WARNING are set if appropriate, as usual.
  *
  * If the string is transformed from UTF-16, then a conversion error may occur
  * if an unpaired surrogate is encountered. If the function is successful, then
  * the output UTF-8 string is always well-formed.
  *
  * @param resB Resource bundle.
  * @param key  A key associated with the wanted resource
  * @param dest Destination buffer. Can be NULL only if capacity=*length==0.
  * @param pLength Input: Capacity of destination buffer.
  *               Output: Actual length of the UTF-8 string, not counting the
  *               terminating NUL, even in case of U_BUFFER_OVERFLOW_ERROR.
  *               Can be NULL, meaning capacity=0 and the string length is not
  *               returned to the caller.
  * @param forceCopy If true, then the output string will always be written to
  *                  dest, with U_BUFFER_OVERFLOW_ERROR and
  *                  U_STRING_NOT_TERMINATED_WARNING set if appropriate.
  *                  If false, then the dest buffer may or may not contain a
  *                  copy of the string. dest may or may not be modified.
  *                  If a copy needs to be written, then the UErrorCode parameter
  *                  indicates overflow etc. as usual.
  * @param status Pointer to a standard ICU error code. Its input value must
  *               pass the U_SUCCESS() test, or else the function returns
  *               immediately. Check for U_FAILURE() on output or use with
  *               function chaining. (See User Guide for details.)
  * @return The pointer to the UTF-8 string. It may be dest, or at some offset
  *         from dest (only if !forceCopy), or in unrelated memory.
  *         Always NUL-terminated unless the string was written to dest and
  *         length==capacity (in which case U_STRING_NOT_TERMINATED_WARNING is set).
  *
  * @see ures_getStringByKey
  * @see u_strToUTF8
  * @stable ICU 3.6
  */
 U_CAPI const char * U_EXPORT2
 ures_getUTF8StringByKey(const UResourceBundle *resB,
                         const char *key,
                         char *dest, int32_t *pLength,
                         UBool forceCopy,
                         UErrorCode *status);
 
 #if U_SHOW_CPLUSPLUS_API
 #include "unicode/unistr.h"
 
 U_NAMESPACE_BEGIN
 /**
  * Returns the string value from a string resource bundle.
  *
  * @param resB    a resource, should have type URES_STRING
  * @param status: fills in the outgoing error code
  *                could be <TT>U_MISSING_RESOURCE_ERROR</TT> if the key is not found
  *                could be a non-failing error
  *                e.g.: <TT>U_USING_FALLBACK_WARNING</TT>,<TT>U_USING_DEFAULT_WARNING </TT>
  * @return The string value, or a bogus string if there is a failure UErrorCode.
  * @stable ICU 2.0
  */
 inline UnicodeString
 ures_getUnicodeString(const UResourceBundle *resB, UErrorCode* status) {
     UnicodeString result;
     int32_t len = 0;
     const char16_t *r = ConstChar16Ptr(ures_getString(resB, &len, status));
     if(U_SUCCESS(*status)) {
         result.setTo(true, r, len);
     } else {
         result.setToBogus();
     }
     return result;
 }
 
 /**
  * Returns the next string in a resource, or an empty string if there are no more resources
  * to iterate over.
  * Use ures_getNextString() instead to distinguish between
  * the end of the iteration and a real empty string value.
  *
  * @param resB              a resource
  * @param key               fill in for key associated with this string
  * @param status            fills in the outgoing error code
  * @return The string value, or a bogus string if there is a failure UErrorCode.
  * @stable ICU 2.0
  */
 inline UnicodeString
 ures_getNextUnicodeString(UResourceBundle *resB, const char ** key, UErrorCode* status) {
     UnicodeString result;
     int32_t len = 0;
     const char16_t* r = ConstChar16Ptr(ures_getNextString(resB, &len, key, status));
     if(U_SUCCESS(*status)) {
         result.setTo(true, r, len);
     } else {
         result.setToBogus();
     }
     return result;
 }
 
 /**
  * Returns the string in a given resource array or table at the specified index.
  *
  * @param resB              a resource
  * @param indexS            an index to the wanted string.
  * @param status            fills in the outgoing error code
  * @return The string value, or a bogus string if there is a failure UErrorCode.
  * @stable ICU 2.0
  */
 inline UnicodeString
 ures_getUnicodeStringByIndex(const UResourceBundle *resB, int32_t indexS, UErrorCode* status) {
     UnicodeString result;
     int32_t len = 0;
     const char16_t* r = ConstChar16Ptr(ures_getStringByIndex(resB, indexS, &len, status));
     if(U_SUCCESS(*status)) {
         result.setTo(true, r, len);
     } else {
         result.setToBogus();
     }
     return result;
 }
 
 /**
  * Returns a string in a resource that has a given key.
  * This procedure works only with table resources.
  *
  * @param resB              a resource
  * @param key               a key associated with the wanted string
  * @param status            fills in the outgoing error code
  * @return The string value, or a bogus string if there is a failure UErrorCode.
  * @stable ICU 2.0
  */
 inline UnicodeString
 ures_getUnicodeStringByKey(const UResourceBundle *resB, const char* key, UErrorCode* status) {
     UnicodeString result;
     int32_t len = 0;
     const char16_t* r = ConstChar16Ptr(ures_getStringByKey(resB, key, &len, status));
     if(U_SUCCESS(*status)) {
         result.setTo(true, r, len);
     } else {
         result.setToBogus();
     }
     return result;
 }
 
 U_NAMESPACE_END
 
 #endif
 
 /**
  * Create a string enumerator, owned by the caller, of all locales located within
  * the specified resource tree.
  * @param packageName name of the tree, such as (NULL) or U_ICUDATA_ALIAS or  or "ICUDATA-coll"
  * This call is similar to uloc_getAvailable().
  * @param status error code
  * @stable ICU 3.2
  */
 U_CAPI UEnumeration* U_EXPORT2
 ures_openAvailableLocales(const char *packageName, UErrorCode *status);
 
 
 #endif /*_URES*/
 /*eof*/

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