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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*****************************************************************************************
* Copyright (C) 2014, International Business Machines
* Corporation and others. All Rights Reserved.
*****************************************************************************************
*/
#ifndef UREGION_H
#define UREGION_H
#include "unicode/utypes.h"
#include "unicode/uenum.h"
/**
* \file
* \brief C API: URegion (territory containment and mapping)
*
* URegion objects represent data associated with a particular Unicode Region Code, also known as a
* Unicode Region Subtag, which is defined based upon the BCP 47 standard. These include:
* * Two-letter codes defined by ISO 3166-1, with special LDML treatment of certain private-use or
* reserved codes;
* * A subset of 3-digit numeric codes defined by UN M.49.
* URegion objects can also provide mappings to and from additional codes. There are different types
* of regions that are important to distinguish:
* <p>
* Macroregion - A code for a "macro geographical (continental) region, geographical sub-region, or
* selected economic and other grouping" as defined in UN M.49. These are typically 3-digit codes,
* but contain some 2-letter codes for LDML extensions, such as "QO" for Outlying Oceania.
* Macroregions are represented in ICU by one of three region types: WORLD (code 001),
* CONTINENTS (regions contained directly by WORLD), and SUBCONTINENTS (regions contained directly
* by a continent ).
* <p>
* TERRITORY - A Region that is not a Macroregion. These are typically codes for countries, but also
* include areas that are not separate countries, such as the code "AQ" for Antarctica or the code
* "HK" for Hong Kong (SAR China). Overseas dependencies of countries may or may not have separate
* codes. The codes are typically 2-letter codes aligned with ISO 3166, but BCP47 allows for the use
* of 3-digit codes in the future.
* <p>
* UNKNOWN - The code ZZ is defined by Unicode LDML for use in indicating that region is unknown,
* or that the value supplied as a region was invalid.
* <p>
* DEPRECATED - Region codes that have been defined in the past but are no longer in modern usage,
* usually due to a country splitting into multiple territories or changing its name.
* <p>
* GROUPING - A widely understood grouping of territories that has a well defined membership such
* that a region code has been assigned for it. Some of these are UN M.49 codes that don't fall into
* the world/continent/sub-continent hierarchy, while others are just well-known groupings that have
* their own region code. Region "EU" (European Union) is one such region code that is a grouping.
* Groupings will never be returned by the uregion_getContainingRegion, since a different type of region
* (WORLD, CONTINENT, or SUBCONTINENT) will always be the containing region instead.
*
* URegion objects are const/immutable, owned and maintained by ICU itself, so there are not functions
* to open or close them.
*/
/**
* URegionType is an enumeration defining the different types of regions. Current possible
* values are URGN_WORLD, URGN_CONTINENT, URGN_SUBCONTINENT, URGN_TERRITORY, URGN_GROUPING,
* URGN_DEPRECATED, and URGN_UNKNOWN.
*
* @stable ICU 51
*/
typedef enum URegionType {
/**
* Type representing the unknown region.
* @stable ICU 51
*/
URGN_UNKNOWN,
/**
* Type representing a territory.
* @stable ICU 51
*/
URGN_TERRITORY,
/**
* Type representing the whole world.
* @stable ICU 51
*/
URGN_WORLD,
/**
* Type representing a continent.
* @stable ICU 51
*/
URGN_CONTINENT,
/**
* Type representing a sub-continent.
* @stable ICU 51
*/
URGN_SUBCONTINENT,
/**
* Type representing a grouping of territories that is not to be used in
* the normal WORLD/CONTINENT/SUBCONTINENT/TERRITORY containment tree.
* @stable ICU 51
*/
URGN_GROUPING,
/**
* Type representing a region whose code has been deprecated, usually
* due to a country splitting into multiple territories or changing its name.
* @stable ICU 51
*/
URGN_DEPRECATED,
#ifndef U_HIDE_DEPRECATED_API
/**
* One more than the highest normal URegionType value.
* @deprecated ICU 58 The numeric value may change over time, see ICU ticket #12420.
*/
URGN_LIMIT
#endif /* U_HIDE_DEPRECATED_API */
} URegionType;
#if !UCONFIG_NO_FORMATTING
/**
* Opaque URegion object for use in C programs.
* @stable ICU 52
*/
struct URegion;
typedef struct URegion URegion; /**< @stable ICU 52 */
/**
* Returns a pointer to a URegion for the specified region code: A 2-letter or 3-letter ISO 3166
* code, UN M.49 numeric code (superset of ISO 3166 numeric codes), or other valid Unicode Region
* Code as defined by the LDML specification. The code will be canonicalized internally. If the
* region code is NULL or not recognized, the appropriate error code will be set
* (U_ILLEGAL_ARGUMENT_ERROR).
* @stable ICU 52
*/
U_CAPI const URegion* U_EXPORT2
uregion_getRegionFromCode(const char *regionCode, UErrorCode *status);
/**
* Returns a pointer to a URegion for the specified numeric region code. If the numeric region
* code is not recognized, the appropriate error code will be set (U_ILLEGAL_ARGUMENT_ERROR).
* @stable ICU 52
*/
U_CAPI const URegion* U_EXPORT2
uregion_getRegionFromNumericCode (int32_t code, UErrorCode *status);
/**
* Returns an enumeration over the canonical codes of all known regions that match the given type.
* The enumeration must be closed with with uenum_close().
* @stable ICU 52
*/
U_CAPI UEnumeration* U_EXPORT2
uregion_getAvailable(URegionType type, UErrorCode *status);
/**
* Returns true if the specified uregion is equal to the specified otherRegion.
* @stable ICU 52
*/
U_CAPI UBool U_EXPORT2
uregion_areEqual(const URegion* uregion, const URegion* otherRegion);
/**
* Returns a pointer to the URegion that contains the specified uregion. Returns NULL if the
* specified uregion is code "001" (World) or "ZZ" (Unknown region). For example, calling
* this method with region "IT" (Italy) returns the URegion for "039" (Southern Europe).
* @stable ICU 52
*/
U_CAPI const URegion* U_EXPORT2
uregion_getContainingRegion(const URegion* uregion);
/**
* Return a pointer to the URegion that geographically contains this uregion and matches the
* specified type, moving multiple steps up the containment chain if necessary. Returns NULL if no
* containing region can be found that matches the specified type. Will return NULL if URegionType
* is URGN_GROUPING, URGN_DEPRECATED, or URGN_UNKNOWN which are not appropriate for this API.
* For example, calling this method with uregion "IT" (Italy) for type URGN_CONTINENT returns the
* URegion "150" (Europe).
* @stable ICU 52
*/
U_CAPI const URegion* U_EXPORT2
uregion_getContainingRegionOfType(const URegion* uregion, URegionType type);
/**
* Return an enumeration over the canonical codes of all the regions that are immediate children
* of the specified uregion in the region hierarchy. These returned regions could be either macro
* regions, territories, or a mixture of the two, depending on the containment data as defined in
* CLDR. This API returns NULL if this uregion doesn't have any sub-regions. For example, calling
* this function for uregion "150" (Europe) returns an enumeration containing the various
* sub-regions of Europe: "039" (Southern Europe), "151" (Eastern Europe), "154" (Northern Europe),
* and "155" (Western Europe). The enumeration must be closed with with uenum_close().
* @stable ICU 52
*/
U_CAPI UEnumeration* U_EXPORT2
uregion_getContainedRegions(const URegion* uregion, UErrorCode *status);
/**
* Returns an enumeration over the canonical codes of all the regions that are children of the
* specified uregion anywhere in the region hierarchy and match the given type. This API may return
* an empty enumeration if this uregion doesn't have any sub-regions that match the given type.
* For example, calling this method with region "150" (Europe) and type URGN_TERRITORY" returns an
* enumeration containing all the territories in Europe: "FR" (France), "IT" (Italy), "DE" (Germany),
* etc. The enumeration must be closed with with uenum_close().
* @stable ICU 52
*/
U_CAPI UEnumeration* U_EXPORT2
uregion_getContainedRegionsOfType(const URegion* uregion, URegionType type, UErrorCode *status);
/**
* Returns true if the specified uregion contains the specified otherRegion anywhere in the region
* hierarchy.
* @stable ICU 52
*/
U_CAPI UBool U_EXPORT2
uregion_contains(const URegion* uregion, const URegion* otherRegion);
/**
* If the specified uregion is deprecated, returns an enumeration over the canonical codes of the
* regions that are the preferred replacement regions for the specified uregion. If the specified
* uregion is not deprecated, returns NULL. For example, calling this method with uregion
* "SU" (Soviet Union) returns a list of the regions containing "RU" (Russia), "AM" (Armenia),
* "AZ" (Azerbaijan), etc... The enumeration must be closed with with uenum_close().
* @stable ICU 52
*/
U_CAPI UEnumeration* U_EXPORT2
uregion_getPreferredValues(const URegion* uregion, UErrorCode *status);
/**
* Returns the specified uregion's canonical code.
* @stable ICU 52
*/
U_CAPI const char* U_EXPORT2
uregion_getRegionCode(const URegion* uregion);
/**
* Returns the specified uregion's numeric code, or a negative value if there is no numeric code
* for the specified uregion.
* @stable ICU 52
*/
U_CAPI int32_t U_EXPORT2
uregion_getNumericCode(const URegion* uregion);
/**
* Returns the URegionType of the specified uregion.
* @stable ICU 52
*/
U_CAPI URegionType U_EXPORT2
uregion_getType(const URegion* uregion);
#endif /* #if !UCONFIG_NO_FORMATTING */
#endif
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