1 // © 2016 and later: Unicode, Inc. and others. 2 // License & terms of use: http://www.unicode.org/copyright.html 3 /* 4 ********************************************************************** 5 * Copyright (C) 2000-2016, International Business Machines 6 * Corporation and others. All Rights Reserved. 7 ********************************************************************** 8 */ 9 10 #ifndef URESIMP_H 11 #define URESIMP_H 12 13 #include "unicode/ures.h" 14 #include "unicode/utypes.h" 15 16 #include "uresdata.h" 17 18 #define kRootLocaleName "root" 19 #define kPoolBundleName "pool" 20 21 /* 22 The default minor version and the version separator must be exactly one 23 character long. 24 */ 25 26 #define kDefaultMinorVersion "0" 27 #define kVersionSeparator "." 28 #define kVersionTag "Version" 29 30 #define MAGIC1 19700503 31 #define MAGIC2 19641227 32 33 #define URES_MAX_ALIAS_LEVEL 256 34 #define URES_MAX_BUFFER_SIZE 256 35 36 #define EMPTY_SET 0x2205 37 38 struct UResourceDataEntry; 39 typedef struct UResourceDataEntry UResourceDataEntry; 40 41 /* 42 * Note: If we wanted to make this structure smaller, then we could try 43 * to use one UResourceDataEntry pointer for fAlias and fPool, with a separate 44 * flag to distinguish whether this struct is for a real bundle with a pool, 45 * or for an alias entry for which we won't use the pool after loading. 46 */ 47 struct UResourceDataEntry { 48 char *fName; /* name of the locale for bundle - still to decide whether it is original or fallback */ 49 char *fPath; /* path to bundle - used for distinguishing between resources with the same name */ 50 UResourceDataEntry *fParent; /*next resource in fallback chain*/ 51 UResourceDataEntry *fAlias; 52 UResourceDataEntry *fPool; 53 ResourceData fData; /* data for low level access */ 54 char fNameBuffer[3]; /* A small buffer of free space for fName. The free space is due to struct padding. */ 55 uint32_t fCountExisting; /* how much is this resource used */ 56 UErrorCode fBogus; 57 /* int32_t fHashKey;*/ /* for faster access in the hashtable */ 58 }; 59 60 #define RES_BUFSIZE 64 61 #define RES_PATH_SEPARATOR '/' 62 #define RES_PATH_SEPARATOR_S "/" 63 64 struct UResourceBundle { 65 const char *fKey; /*tag*/ 66 UResourceDataEntry *fData; /*for low-level access*/ 67 char *fVersion; 68 UResourceDataEntry *fTopLevelData; /* for getting the valid locale */ 69 char *fResPath; /* full path to the resource: "zh_TW/CollationElements/Sequence" */ 70 // TODO(ICU-20769): Try to change the by-value fResData into a pointer, 71 // with the struct in only one place for each bundle. 72 // Also replace class ResourceDataValue.resData with a pResData pointer again. 73 ResourceData fResData; 74 char fResBuf[RES_BUFSIZE]; 75 int32_t fResPathLen; 76 Resource fRes; 77 UBool fHasFallback; 78 UBool fIsTopLevel; 79 uint32_t fMagic1; /* For determining if it's a stack object */ 80 uint32_t fMagic2; /* For determining if it's a stack object */ 81 int32_t fIndex; 82 int32_t fSize; 83 84 /*const UResourceBundle *fParentRes;*/ /* needed to get the actual locale for a child resource */ 85 }; 86 87 U_CAPI void U_EXPORT2 ures_initStackObject(UResourceBundle* resB); 88 89 #ifdef __cplusplus 90 91 U_NAMESPACE_BEGIN 92 93 /** 94 * \class StackUResourceBundle 95 * "Smart pointer" like class, closes a UResourceBundle via ures_close(). 96 * 97 * This code: 98 * 99 * StackUResourceBundle bundle; 100 * foo(bundle.getAlias()); 101 * 102 * Is equivalent to this code: 103 * 104 * UResourceBundle bundle; 105 * ures_initStackObject(&bundle); 106 * foo(&bundle); 107 * ures_close(&bundle); 108 * 109 * @see LocalUResourceBundlePointer 110 * @internal 111 */ 112 class U_COMMON_API StackUResourceBundle { 113 public: 114 // No heap allocation. Use only on the stack. 115 static void* U_EXPORT2 operator new(size_t) U_NOEXCEPT = delete; 116 static void* U_EXPORT2 operator new[](size_t) U_NOEXCEPT = delete; 117 #if U_HAVE_PLACEMENT_NEW 118 static void* U_EXPORT2 operator new(size_t, void*) U_NOEXCEPT = delete; 119 #endif 120 121 StackUResourceBundle(); 122 ~StackUResourceBundle(); 123 getAlias()124 UResourceBundle* getAlias() { return &bundle; } 125 ref()126 UResourceBundle& ref() { return bundle; } ref()127 const UResourceBundle& ref() const { return bundle; } 128 129 StackUResourceBundle(const StackUResourceBundle&) = delete; 130 StackUResourceBundle& operator=(const StackUResourceBundle&) = delete; 131 132 StackUResourceBundle(StackUResourceBundle&&) = delete; 133 StackUResourceBundle& operator=(StackUResourceBundle&&) = delete; 134 135 private: 136 UResourceBundle bundle; 137 }; 138 139 U_NAMESPACE_END 140 141 #endif /* __cplusplus */ 142 143 /** 144 * Opens a resource bundle for the locale; 145 * if there is not even a base language bundle, then loads the root bundle; 146 * never falls back to the default locale. 147 * 148 * This is used for algorithms that have good pan-Unicode default behavior, 149 * such as case mappings, collation, and segmentation (BreakIterator). 150 */ 151 U_CAPI UResourceBundle* U_EXPORT2 152 ures_openNoDefault(const char* path, const char* localeID, UErrorCode* status); 153 154 /* Some getters used by the copy constructor */ 155 U_CFUNC const char* ures_getName(const UResourceBundle* resB); 156 #ifdef URES_DEBUG 157 U_CFUNC const char* ures_getPath(const UResourceBundle* resB); 158 /** 159 * If anything was in the RB cache, dump it to the screen. 160 * @return true if there was anything into the cache 161 */ 162 U_CAPI UBool U_EXPORT2 ures_dumpCacheContents(void); 163 #endif 164 /*U_CFUNC void ures_appendResPath(UResourceBundle *resB, const char* toAdd, int32_t lenToAdd);*/ 165 /*U_CFUNC void ures_setResPath(UResourceBundle *resB, const char* toAdd);*/ 166 /*U_CFUNC void ures_freeResPath(UResourceBundle *resB);*/ 167 168 /* Candidates for export */ 169 U_CFUNC UResourceBundle *ures_copyResb(UResourceBundle *r, const UResourceBundle *original, UErrorCode *status); 170 171 /** 172 * Returns a resource that can be located using the pathToResource argument. One needs optional package, locale 173 * and path inside the locale, for example: "/myData/en/zoneStrings/3". Keys and indexes are supported. Keys 174 * need to reference data in named structures, while indexes can reference both named and anonymous resources. 175 * Features a fill-in parameter. 176 * 177 * Note, this function does NOT have a syntax for specifying items within a tree. May want to consider a 178 * syntax that delineates between package/tree and resource. 179 * 180 * @param pathToResource a path that will lead to the requested resource 181 * @param fillIn if NULL a new UResourceBundle struct is allocated and must be deleted by the caller. 182 * Alternatively, you can supply a struct to be filled by this function. 183 * @param status fills in the outgoing error code. 184 * @return a pointer to a UResourceBundle struct. If fill in param was NULL, caller must delete it 185 */ 186 U_CAPI UResourceBundle* U_EXPORT2 187 ures_findResource(const char* pathToResource, 188 UResourceBundle *fillIn, UErrorCode *status); 189 190 /** 191 * Returns a sub resource that can be located using the pathToResource argument. One needs a path inside 192 * the supplied resource, for example, if you have "en_US" resource bundle opened, you might ask for 193 * "zoneStrings/3". Keys and indexes are supported. Keys 194 * need to reference data in named structures, while indexes can reference both 195 * named and anonymous resources. 196 * Features a fill-in parameter. 197 * 198 * @param resourceBundle a resource 199 * @param pathToResource a path that will lead to the requested resource 200 * @param fillIn if NULL a new UResourceBundle struct is allocated and must be deleted by the caller. 201 * Alternatively, you can supply a struct to be filled by this function. 202 * @param status fills in the outgoing error code. 203 * @return a pointer to a UResourceBundle struct. If fill in param was NULL, caller must delete it 204 */ 205 U_CAPI UResourceBundle* U_EXPORT2 206 ures_findSubResource(const UResourceBundle *resB, 207 char* pathToResource, 208 UResourceBundle *fillIn, UErrorCode *status); 209 210 /** 211 * Returns a functionally equivalent locale (considering keywords) for the specified keyword. 212 * @param result fillin for the equivalent locale 213 * @param resultCapacity capacity of the fillin buffer 214 * @param path path to the tree, or NULL for ICU data 215 * @param resName top level resource. Example: "collations" 216 * @param keyword locale keyword. Example: "collation" 217 * @param locid The requested locale 218 * @param isAvailable If non-null, pointer to fillin parameter that indicates whether the 219 * requested locale was available. The locale is defined as 'available' if it physically 220 * exists within the specified tree. 221 * @param omitDefault if true, omit keyword and value if default. 'de_DE\@collation=standard' -> 'de_DE' 222 * @param status error code 223 * @return the actual buffer size needed for the full locale. If it's greater 224 * than resultCapacity, the returned full name will be truncated and an error code will be returned. 225 */ 226 U_CAPI int32_t U_EXPORT2 227 ures_getFunctionalEquivalent(char *result, int32_t resultCapacity, 228 const char *path, const char *resName, const char *keyword, const char *locid, 229 UBool *isAvailable, UBool omitDefault, UErrorCode *status); 230 231 /** 232 * Given a tree path and keyword, return a string enumeration of all possible values for that keyword. 233 * @param path path to the tree, or NULL for ICU data 234 * @param keyword a particular keyword to consider, must match a top level resource name 235 * within the tree. 236 * @param status error code 237 */ 238 U_CAPI UEnumeration* U_EXPORT2 239 ures_getKeywordValues(const char *path, const char *keyword, UErrorCode *status); 240 241 242 /** 243 * Get a resource with multi-level fallback. Normally only the top level resources will 244 * fallback to its parent. This performs fallback on subresources. For example, when a table 245 * is defined in a resource bundle and a parent resource bundle, normally no fallback occurs 246 * on the sub-resources because the table is defined in the current resource bundle, but this 247 * function can perform fallback on the sub-resources of the table. 248 * @param resB a resource 249 * @param inKey a key associated with the requested resource 250 * @param fillIn if NULL a new UResourceBundle struct is allocated and must be deleted by the caller. 251 * Alternatively, you can supply a struct to be filled by this function. 252 * @param status: fills in the outgoing error code 253 * could be <TT>U_MISSING_RESOURCE_ERROR</TT> if the key is not found 254 * could be a non-failing error 255 * e.g.: <TT>U_USING_FALLBACK_WARNING</TT>,<TT>U_USING_DEFAULT_WARNING </TT> 256 * @return a pointer to a UResourceBundle struct. If fill in param was NULL, caller must delete it 257 */ 258 U_CAPI UResourceBundle* U_EXPORT2 259 ures_getByKeyWithFallback(const UResourceBundle *resB, 260 const char* inKey, 261 UResourceBundle *fillIn, 262 UErrorCode *status); 263 264 265 /** 266 * Get a String with multi-level fallback. Normally only the top level resources will 267 * fallback to its parent. This performs fallback on subresources. For example, when a table 268 * is defined in a resource bundle and a parent resource bundle, normally no fallback occurs 269 * on the sub-resources because the table is defined in the current resource bundle, but this 270 * function can perform fallback on the sub-resources of the table. 271 * @param resB a resource 272 * @param inKey a key associated with the requested resource 273 * @param len if not NULL, used to return the length of the string 274 * @param status: fills in the outgoing error code 275 * could be <TT>U_MISSING_RESOURCE_ERROR</TT> if the key is not found 276 * could be a non-failing error 277 * e.g.: <TT>U_USING_FALLBACK_WARNING</TT>,<TT>U_USING_DEFAULT_WARNING </TT> 278 * @return returns a pointer to a zero-terminated UChar array which lives in a 279 * memory mapped/DLL file. 280 */ 281 U_CAPI const UChar* U_EXPORT2 282 ures_getStringByKeyWithFallback(const UResourceBundle *resB, 283 const char* inKey, 284 int32_t* len, 285 UErrorCode *status); 286 287 #ifdef __cplusplus 288 289 U_CAPI void U_EXPORT2 290 ures_getValueWithFallback(const UResourceBundle *bundle, const char *path, 291 UResourceBundle *tempFillIn, 292 icu::ResourceDataValue &value, UErrorCode &errorCode); 293 294 U_CAPI void U_EXPORT2 295 ures_getAllItemsWithFallback(const UResourceBundle *bundle, const char *path, 296 icu::ResourceSink &sink, UErrorCode &errorCode); 297 298 #endif /* __cplusplus */ 299 300 /** 301 * Get a version number by key 302 * @param resB bundle containing version number 303 * @param key the key for the version number 304 * @param ver fillin for the version number 305 * @param status error code 306 */ 307 U_CAPI void U_EXPORT2 308 ures_getVersionByKey(const UResourceBundle *resB, 309 const char *key, 310 UVersionInfo ver, 311 UErrorCode *status); 312 313 314 /** 315 * Internal function. 316 * Return the version number associated with this ResourceBundle as a string. 317 * 318 * @param resourceBundle The resource bundle for which the version is checked. 319 * @return A version number string as specified in the resource bundle or its parent. 320 * The caller does not own this string. 321 * @see ures_getVersion 322 */ 323 U_CAPI const char* U_EXPORT2 324 ures_getVersionNumberInternal(const UResourceBundle *resourceBundle); 325 326 /** 327 * Return the name of the Locale associated with this ResourceBundle. This API allows 328 * you to query for the real locale of the resource. For example, if you requested 329 * "en_US_CALIFORNIA" and only "en_US" bundle exists, "en_US" will be returned. 330 * For subresources, the locale where this resource comes from will be returned. 331 * If fallback has occured, getLocale will reflect this. 332 * 333 * This internal version avoids deprecated-warnings in ICU code. 334 * 335 * @param resourceBundle resource bundle in question 336 * @param status just for catching illegal arguments 337 * @return A Locale name 338 */ 339 U_CAPI const char* U_EXPORT2 340 ures_getLocaleInternal(const UResourceBundle* resourceBundle, 341 UErrorCode* status); 342 343 /** 344 * Same as ures_openDirect() but uses the fill-in parameter instead of allocating a new bundle. 345 * 346 * @param r The existing UResourceBundle to fill in. If NULL then status will be 347 * set to U_ILLEGAL_ARGUMENT_ERROR. 348 * @param packageName The packageName and locale together point to an ICU udata object, 349 * as defined by <code> udata_open( packageName, "res", locale, err) </code> 350 * or equivalent. Typically, packageName will refer to a (.dat) file, or to 351 * a package registered with udata_setAppData(). Using a full file or directory 352 * pathname for packageName is deprecated. If NULL, ICU data will be used. 353 * @param locale specifies the locale for which we want to open the resource 354 * if NULL, the default locale will be used. If strlen(locale) == 0 355 * root locale will be used. 356 * @param status The error code. 357 * @see ures_openDirect 358 * @internal 359 */ 360 U_CAPI void U_EXPORT2 361 ures_openDirectFillIn(UResourceBundle *r, 362 const char *packageName, 363 const char *locale, 364 UErrorCode *status); 365 366 #endif /*URESIMP_H*/ 367