icuSources/common/uresimp.h

   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
  15 #include "uresdata.h"
  16
  17 #define kRootLocaleName         "root"
  18 #define kPoolBundleName         "pool"
  19
  20 /*
  21  The default minor version and the version separator must be exactly one
  22  character long.
  23 */
  24
  25 #define kDefaultMinorVersion    "0"
  26 #define kVersionSeparator       "."
  27 #define kVersionTag             "Version"
  28
  29 #define MAGIC1 19700503
  30 #define MAGIC2 19641227
  31
  32 #define URES_MAX_ALIAS_LEVEL 256
  33 #define URES_MAX_BUFFER_SIZE 256
  34
  35 #define EMPTY_SET 0x2205
  36
  37 struct UResourceDataEntry;
  38 typedef struct UResourceDataEntry UResourceDataEntry;
  39
  40 /*
  41  * Note: If we wanted to make this structure smaller, then we could try
  42  * to use one UResourceDataEntry pointer for fAlias and fPool, with a separate
  43  * flag to distinguish whether this struct is for a real bundle with a pool,
  44  * or for an alias entry for which we won't use the pool after loading.
  45  */
  46 struct UResourceDataEntry {
  47     char *fName; /* name of the locale for bundle - still to decide whether it is original or fallback */
  48     char *fPath; /* path to bundle - used for distinguishing between resources with the same name */
  49     UResourceDataEntry *fParent; /*next resource in fallback chain*/
  50     UResourceDataEntry *fAlias;
  51     UResourceDataEntry *fPool;
  52     ResourceData fData; /* data for low level access */
  53     char fNameBuffer[3]; /* A small buffer of free space for fName. The free space is due to struct padding. */
  54     uint32_t fCountExisting; /* how much is this resource used */
  55     UErrorCode fBogus;
  56     /* int32_t fHashKey;*/ /* for faster access in the hashtable */
  57 };
  58
  59 #define RES_BUFSIZE 64
  60 #define RES_PATH_SEPARATOR   '/'
  61 #define RES_PATH_SEPARATOR_S   "/"
  62
  63 struct UResourceBundle {
  64     const char *fKey; /*tag*/
  65     UResourceDataEntry *fData; /*for low-level access*/
  66     char *fVersion;
  67     UResourceDataEntry *fTopLevelData; /* for getting the valid locale */
  68     char *fResPath; /* full path to the resource: "zh_TW/CollationElements/Sequence" */
  69     ResourceData fResData;
  70     char fResBuf[RES_BUFSIZE];
  71     int32_t fResPathLen;
  72     Resource fRes;
  73     UBool fHasFallback;
  74     UBool fIsTopLevel;
  75     uint32_t fMagic1;   /* For determining if it's a stack object */
  76     uint32_t fMagic2;   /* For determining if it's a stack object */
  77     int32_t fIndex;
  78     int32_t fSize;
  79
  80     /*const UResourceBundle *fParentRes;*/ /* needed to get the actual locale for a child resource */
  81 };
  82
  83 U_CAPI void U_EXPORT2 ures_initStackObject(UResourceBundle* resB);
  84
  85 /**
  86  * Opens a resource bundle for the locale;
  87  * if there is not even a base language bundle, then loads the root bundle;
  88  * never falls back to the default locale.
  89  *
  90  * This is used for algorithms that have good pan-Unicode default behavior,
  91  * such as case mappings, collation, and segmentation (BreakIterator).
  92  */
  93 U_CAPI UResourceBundle* U_EXPORT2
  94 ures_openNoDefault(const char* path, const char* localeID, UErrorCode* status);
  95
  96 /* Some getters used by the copy constructor */
  97 U_CFUNC const char* ures_getName(const UResourceBundle* resB);
  98 #ifdef URES_DEBUG
  99 U_CFUNC const char* ures_getPath(const UResourceBundle* resB);
 100 /**
 101  * If anything was in the RB cache, dump it to the screen.
 102  * @return TRUE if there was anything into the cache
 103  */
 104 U_CAPI UBool U_EXPORT2 ures_dumpCacheContents(void);
 105 #endif
 106 /*U_CFUNC void ures_appendResPath(UResourceBundle *resB, const char* toAdd, int32_t lenToAdd);*/
 107 /*U_CFUNC void ures_setResPath(UResourceBundle *resB, const char* toAdd);*/
 108 /*U_CFUNC void ures_freeResPath(UResourceBundle *resB);*/
 109
 110 /* Candidates for export */
 111 U_CFUNC UResourceBundle *ures_copyResb(UResourceBundle *r, const UResourceBundle *original, UErrorCode *status);
 112
 113 /**
 114  * Returns a resource that can be located using the pathToResource argument. One needs optional package, locale
 115  * and path inside the locale, for example: "/myData/en/zoneStrings/3". Keys and indexes are supported. Keys
 116  * need to reference data in named structures, while indexes can reference both named and anonymous resources.
 117  * Features a fill-in parameter.
 118  *
 119  * Note, this function does NOT have a syntax for specifying items within a tree.  May want to consider a
 120  * syntax that delineates between package/tree and resource.
 121  *
 122  * @param pathToResource    a path that will lead to the requested resource
 123  * @param fillIn            if NULL a new UResourceBundle struct is allocated and must be deleted by the caller.
 124  *                          Alternatively, you can supply a struct to be filled by this function.
 125  * @param status            fills in the outgoing error code.
 126  * @return                  a pointer to a UResourceBundle struct. If fill in param was NULL, caller must delete it
 127  */
 128 U_CAPI UResourceBundle* U_EXPORT2
 129 ures_findResource(const char* pathToResource,
 130                   UResourceBundle *fillIn, UErrorCode *status);
 131
 132 /**
 133  * Returns a sub resource that can be located using the pathToResource argument. One needs a path inside
 134  * the supplied resource, for example, if you have "en_US" resource bundle opened, you might ask for
 135  * "zoneStrings/3". Keys and indexes are supported. Keys
 136  * need to reference data in named structures, while indexes can reference both
 137  * named and anonymous resources.
 138  * Features a fill-in parameter.
 139  *
 140  * @param resourceBundle    a resource
 141  * @param pathToResource    a path that will lead to the requested resource
 142  * @param fillIn            if NULL a new UResourceBundle struct is allocated and must be deleted by the caller.
 143  *                          Alternatively, you can supply a struct to be filled by this function.
 144  * @param status            fills in the outgoing error code.
 145  * @return                  a pointer to a UResourceBundle struct. If fill in param was NULL, caller must delete it
 146  */
 147 U_CAPI UResourceBundle* U_EXPORT2
 148 ures_findSubResource(const UResourceBundle *resB,
 149                      char* pathToResource,
 150                      UResourceBundle *fillIn, UErrorCode *status);
 151
 152 /**
 153  * Returns a functionally equivalent locale (considering keywords) for the specified keyword.
 154  * @param result fillin for the equivalent locale
 155  * @param resultCapacity capacity of the fillin buffer
 156  * @param path path to the tree, or NULL for ICU data
 157  * @param resName top level resource. Example: "collations"
 158  * @param keyword locale keyword. Example: "collation"
 159  * @param locid The requested locale
 160  * @param isAvailable If non-null, pointer to fillin parameter that indicates whether the
 161  * requested locale was available. The locale is defined as 'available' if it physically
 162  * exists within the specified tree.
 163  * @param omitDefault if TRUE, omit keyword and value if default. 'de_DE\@collation=standard' -> 'de_DE'
 164  * @param status error code
 165  * @return  the actual buffer size needed for the full locale.  If it's greater
 166  * than resultCapacity, the returned full name will be truncated and an error code will be returned.
 167  */
 168 U_CAPI int32_t U_EXPORT2
 169 ures_getFunctionalEquivalent(char *result, int32_t resultCapacity,
 170                              const char *path, const char *resName, const char *keyword, const char *locid,
 171                              UBool *isAvailable, UBool omitDefault, UErrorCode *status);
 172
 173 /**
 174  * Given a tree path and keyword, return a string enumeration of all possible values for that keyword.
 175  * @param path path to the tree, or NULL for ICU data
 176  * @param keyword a particular keyword to consider, must match a top level resource name
 177  * within the tree.
 178  * @param status error code
 179  */
 180 U_CAPI UEnumeration* U_EXPORT2
 181 ures_getKeywordValues(const char *path, const char *keyword, UErrorCode *status);
 182
 183
 184 /**
 185  * Get a resource with multi-level fallback. Normally only the top level resources will
 186  * fallback to its parent. This performs fallback on subresources. For example, when a table
 187  * is defined in a resource bundle and a parent resource bundle, normally no fallback occurs
 188  * on the sub-resources because the table is defined in the current resource bundle, but this
 189  * function can perform fallback on the sub-resources of the table.
 190  * @param resB              a resource
 191  * @param inKey             a key associated with the requested resource
 192  * @param fillIn            if NULL a new UResourceBundle struct is allocated and must be deleted by the caller.
 193  *                          Alternatively, you can supply a struct to be filled by this function.
 194  * @param status: fills in the outgoing error code
 195  *                could be <TT>U_MISSING_RESOURCE_ERROR</TT> if the key is not found
 196  *                could be a non-failing error
 197  *                e.g.: <TT>U_USING_FALLBACK_WARNING</TT>,<TT>U_USING_DEFAULT_WARNING </TT>
 198  * @return                  a pointer to a UResourceBundle struct. If fill in param was NULL, caller must delete it
 199  */
 200 U_CAPI UResourceBundle* U_EXPORT2
 201 ures_getByKeyWithFallback(const UResourceBundle *resB,
 202                           const char* inKey,
 203                           UResourceBundle *fillIn,
 204                           UErrorCode *status);
 205
 206
 207 /**
 208  * Get a String with multi-level fallback. Normally only the top level resources will
 209  * fallback to its parent. This performs fallback on subresources. For example, when a table
 210  * is defined in a resource bundle and a parent resource bundle, normally no fallback occurs
 211  * on the sub-resources because the table is defined in the current resource bundle, but this
 212  * function can perform fallback on the sub-resources of the table.
 213  * @param resB              a resource
 214  * @param inKey             a key associated with the requested resource
 215  * @param status: fills in the outgoing error code
 216  *                could be <TT>U_MISSING_RESOURCE_ERROR</TT> if the key is not found
 217  *                could be a non-failing error
 218  *                e.g.: <TT>U_USING_FALLBACK_WARNING</TT>,<TT>U_USING_DEFAULT_WARNING </TT>
 219  * @return                  a pointer to a UResourceBundle struct. If fill in param was NULL, caller must delete it
 220  */
 221 U_CAPI const UChar* U_EXPORT2
 222 ures_getStringByKeyWithFallback(const UResourceBundle *resB,
 223                           const char* inKey,
 224                           int32_t* len,
 225                           UErrorCode *status);
 226
 227 #ifdef __cplusplus
 228
 229 U_CAPI void U_EXPORT2
 230 ures_getAllItemsWithFallback(const UResourceBundle *bundle, const char *path,
 231                              icu::ResourceSink &sink, UErrorCode &errorCode);
 232
 233 #endif  /* __cplusplus */
 234
 235 /**
 236  * Get a version number by key
 237  * @param resB bundle containing version number
 238  * @param key the key for the version number
 239  * @param ver fillin for the version number
 240  * @param status error code
 241  */
 242 U_CAPI void U_EXPORT2
 243 ures_getVersionByKey(const UResourceBundle *resB,
 244                      const char *key,
 245                      UVersionInfo ver,
 246                      UErrorCode *status);
 247
 248
 249 /**
 250  * Internal function.
 251  * Return the version number associated with this ResourceBundle as a string.
 252  *
 253  * @param resourceBundle The resource bundle for which the version is checked.
 254  * @return  A version number string as specified in the resource bundle or its parent.
 255  *          The caller does not own this string.
 256  * @see ures_getVersion
 257  */
 258 U_CAPI const char* U_EXPORT2
 259 ures_getVersionNumberInternal(const UResourceBundle *resourceBundle);
 260
 261 /**
 262  * Return the name of the Locale associated with this ResourceBundle. This API allows
 263  * you to query for the real locale of the resource. For example, if you requested
 264  * "en_US_CALIFORNIA" and only "en_US" bundle exists, "en_US" will be returned.
 265  * For subresources, the locale where this resource comes from will be returned.
 266  * If fallback has occured, getLocale will reflect this.
 267  *
 268  * This internal version avoids deprecated-warnings in ICU code.
 269  *
 270  * @param resourceBundle resource bundle in question
 271  * @param status just for catching illegal arguments
 272  * @return  A Locale name
 273  */
 274 U_CAPI const char* U_EXPORT2
 275 ures_getLocaleInternal(const UResourceBundle* resourceBundle,
 276                UErrorCode* status);
 277
 278 #endif /*URESIMP_H*/