1 /* 2 ***************************************************************************************** 3 * Copyright (C) 2014, International Business Machines 4 * Corporation and others. All Rights Reserved. 5 ***************************************************************************************** 6 */ 7 8 #ifndef UREGION_H 9 #define UREGION_H 10 11 #include "unicode/utypes.h" 12 #include "unicode/uenum.h" 13 14 /** 15 * \file 16 * \brief C API: URegion (territory containment and mapping) 17 * 18 * URegion objects represent data associated with a particular Unicode Region Code, also known as a 19 * Unicode Region Subtag, which is defined based upon the BCP 47 standard. These include: 20 * * Two-letter codes defined by ISO 3166-1, with special LDML treatment of certain private-use or 21 * reserved codes; 22 * * A subset of 3-digit numeric codes defined by UN M.49. 23 * URegion objects can also provide mappings to and from additional codes. There are different types 24 * of regions that are important to distinguish: 25 * <p> 26 * Macroregion - A code for a "macro geographical (continental) region, geographical sub-region, or 27 * selected economic and other grouping" as defined in UN M.49. These are typically 3-digit codes, 28 * but contain some 2-letter codes for LDML extensions, such as "QO" for Outlying Oceania. 29 * Macroregions are represented in ICU by one of three region types: WORLD (code 001), 30 * CONTINENTS (regions contained directly by WORLD), and SUBCONTINENTS (regions contained directly 31 * by a continent ). 32 * <p> 33 * TERRITORY - A Region that is not a Macroregion. These are typically codes for countries, but also 34 * include areas that are not separate countries, such as the code "AQ" for Antarctica or the code 35 * "HK" for Hong Kong (SAR China). Overseas dependencies of countries may or may not have separate 36 * codes. The codes are typically 2-letter codes aligned with ISO 3166, but BCP47 allows for the use 37 * of 3-digit codes in the future. 38 * <p> 39 * UNKNOWN - The code ZZ is defined by Unicode LDML for use in indicating that region is unknown, 40 * or that the value supplied as a region was invalid. 41 * <p> 42 * DEPRECATED - Region codes that have been defined in the past but are no longer in modern usage, 43 * usually due to a country splitting into multiple territories or changing its name. 44 * <p> 45 * GROUPING - A widely understood grouping of territories that has a well defined membership such 46 * that a region code has been assigned for it. Some of these are UN M.49 codes that don't fall into 47 * the world/continent/sub-continent hierarchy, while others are just well-known groupings that have 48 * their own region code. Region "EU" (European Union) is one such region code that is a grouping. 49 * Groupings will never be returned by the uregion_getContainingRegion, since a different type of region 50 * (WORLD, CONTINENT, or SUBCONTINENT) will always be the containing region instead. 51 * 52 * URegion objects are const/immutable, owned and maintained by ICU itself, so there are not functions 53 * to open or close them. 54 */ 55 56 /** 57 * URegionType is an enumeration defining the different types of regions. Current possible 58 * values are URGN_WORLD, URGN_CONTINENT, URGN_SUBCONTINENT, URGN_TERRITORY, URGN_GROUPING, 59 * URGN_DEPRECATED, and URGN_UNKNOWN. 60 * 61 * @stable ICU 51 62 */ 63 typedef enum URegionType { 64 /** 65 * Type representing the unknown region. 66 * @stable ICU 51 67 */ 68 URGN_UNKNOWN, 69 70 /** 71 * Type representing a territory. 72 * @stable ICU 51 73 */ 74 URGN_TERRITORY, 75 76 /** 77 * Type representing the whole world. 78 * @stable ICU 51 79 */ 80 URGN_WORLD, 81 82 /** 83 * Type representing a continent. 84 * @stable ICU 51 85 */ 86 URGN_CONTINENT, 87 88 /** 89 * Type representing a sub-continent. 90 * @stable ICU 51 91 */ 92 URGN_SUBCONTINENT, 93 94 /** 95 * Type representing a grouping of territories that is not to be used in 96 * the normal WORLD/CONTINENT/SUBCONTINENT/TERRITORY containment tree. 97 * @stable ICU 51 98 */ 99 URGN_GROUPING, 100 101 /** 102 * Type representing a region whose code has been deprecated, usually 103 * due to a country splitting into multiple territories or changing its name. 104 * @stable ICU 51 105 */ 106 URGN_DEPRECATED, 107 108 /** 109 * Maximum value for this unumeration. 110 * @stable ICU 51 111 */ 112 URGN_LIMIT 113 } URegionType; 114 115 #if !UCONFIG_NO_FORMATTING 116 117 /** 118 * Opaque URegion object for use in C programs. 119 * @stable ICU 52 120 */ 121 struct URegion; 122 typedef struct URegion URegion; /**< @stable ICU 52 */ 123 124 /** 125 * Returns a pointer to a URegion for the specified region code: A 2-letter or 3-letter ISO 3166 126 * code, UN M.49 numeric code (superset of ISO 3166 numeric codes), or other valid Unicode Region 127 * Code as defined by the LDML specification. The code will be canonicalized internally. If the 128 * region code is NULL or not recognized, the appropriate error code will be set 129 * (U_ILLEGAL_ARGUMENT_ERROR). 130 * @stable ICU 52 131 */ 132 U_STABLE const URegion* U_EXPORT2 133 uregion_getRegionFromCode(const char *regionCode, UErrorCode *status); 134 135 /** 136 * Returns a pointer to a URegion for the specified numeric region code. If the numeric region 137 * code is not recognized, the appropriate error code will be set (U_ILLEGAL_ARGUMENT_ERROR). 138 * @stable ICU 52 139 */ 140 U_STABLE const URegion* U_EXPORT2 141 uregion_getRegionFromNumericCode (int32_t code, UErrorCode *status); 142 143 /** 144 * Returns an enumeration over the canonical codes of all known regions that match the given type. 145 * The enumeration must be closed with with uenum_close(). 146 * @stable ICU 52 147 */ 148 U_STABLE UEnumeration* U_EXPORT2 149 uregion_getAvailable(URegionType type, UErrorCode *status); 150 151 /** 152 * Returns true if the specified uregion is equal to the specified otherRegion. 153 * @stable ICU 52 154 */ 155 U_STABLE UBool U_EXPORT2 156 uregion_areEqual(const URegion* uregion, const URegion* otherRegion); 157 158 /** 159 * Returns a pointer to the URegion that contains the specified uregion. Returns NULL if the 160 * specified uregion is code "001" (World) or "ZZ" (Unknown region). For example, calling 161 * this method with region "IT" (Italy) returns the URegion for "039" (Southern Europe). 162 * @stable ICU 52 163 */ 164 U_STABLE const URegion* U_EXPORT2 165 uregion_getContainingRegion(const URegion* uregion); 166 167 /** 168 * Return a pointer to the URegion that geographically contains this uregion and matches the 169 * specified type, moving multiple steps up the containment chain if necessary. Returns NULL if no 170 * containing region can be found that matches the specified type. Will return NULL if URegionType 171 * is URGN_GROUPING, URGN_DEPRECATED, or URGN_UNKNOWN which are not appropriate for this API. 172 * For example, calling this method with uregion "IT" (Italy) for type URGN_CONTINENT returns the 173 * URegion "150" (Europe). 174 * @stable ICU 52 175 */ 176 U_STABLE const URegion* U_EXPORT2 177 uregion_getContainingRegionOfType(const URegion* uregion, URegionType type); 178 179 /** 180 * Return an enumeration over the canonical codes of all the regions that are immediate children 181 * of the specified uregion in the region hierarchy. These returned regions could be either macro 182 * regions, territories, or a mixture of the two, depending on the containment data as defined in 183 * CLDR. This API returns NULL if this uregion doesn't have any sub-regions. For example, calling 184 * this function for uregion "150" (Europe) returns an enumeration containing the various 185 * sub-regions of Europe: "039" (Southern Europe), "151" (Eastern Europe), "154" (Northern Europe), 186 * and "155" (Western Europe). The enumeration must be closed with with uenum_close(). 187 * @stable ICU 52 188 */ 189 U_STABLE UEnumeration* U_EXPORT2 190 uregion_getContainedRegions(const URegion* uregion, UErrorCode *status); 191 192 /** 193 * Returns an enumeration over the canonical codes of all the regions that are children of the 194 * specified uregion anywhere in the region hierarchy and match the given type. This API may return 195 * an empty enumeration if this uregion doesn't have any sub-regions that match the given type. 196 * For example, calling this method with region "150" (Europe) and type URGN_TERRITORY" returns an 197 * enumeration containing all the territories in Europe: "FR" (France), "IT" (Italy), "DE" (Germany), 198 * etc. The enumeration must be closed with with uenum_close(). 199 * @stable ICU 52 200 */ 201 U_STABLE UEnumeration* U_EXPORT2 202 uregion_getContainedRegionsOfType(const URegion* uregion, URegionType type, UErrorCode *status); 203 204 /** 205 * Returns true if the specified uregion contains the specified otherRegion anywhere in the region 206 * hierarchy. 207 * @stable ICU 52 208 */ 209 U_STABLE UBool U_EXPORT2 210 uregion_contains(const URegion* uregion, const URegion* otherRegion); 211 212 /** 213 * If the specified uregion is deprecated, returns an enumeration over the canonical codes of the 214 * regions that are the preferred replacement regions for the specified uregion. If the specified 215 * uregion is not deprecated, returns NULL. For example, calling this method with uregion 216 * "SU" (Soviet Union) returns a list of the regions containing "RU" (Russia), "AM" (Armenia), 217 * "AZ" (Azerbaijan), etc... The enumeration must be closed with with uenum_close(). 218 * @stable ICU 52 219 */ 220 U_STABLE UEnumeration* U_EXPORT2 221 uregion_getPreferredValues(const URegion* uregion, UErrorCode *status); 222 223 /** 224 * Returns the specified uregion's canonical code. 225 * @stable ICU 52 226 */ 227 U_STABLE const char* U_EXPORT2 228 uregion_getRegionCode(const URegion* uregion); 229 230 /** 231 * Returns the specified uregion's numeric code, or a negative value if there is no numeric code 232 * for the specified uregion. 233 * @stable ICU 52 234 */ 235 U_STABLE int32_t U_EXPORT2 236 uregion_getNumericCode(const URegion* uregion); 237 238 /** 239 * Returns the URegionType of the specified uregion. 240 * @stable ICU 52 241 */ 242 U_STABLE URegionType U_EXPORT2 243 uregion_getType(const URegion* uregion); 244 245 246 #endif /* #if !UCONFIG_NO_FORMATTING */ 247 248 #endif 249
