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1 // © 2016 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 /*
4 ******************************************************************************
5 *
6 * Copyright (C) 1996-2013, International Business Machines Corporation
7 * and others. All Rights Reserved.
8 *
9 ******************************************************************************
10 *
11 * File resbund.h
12 *
13 * CREATED BY
14 * Richard Gillam
15 *
16 * Modification History:
17 *
18 * Date Name Description
19 * 2/5/97 aliu Added scanForLocaleInFile. Added
20 * constructor which attempts to read resource bundle
21 * from a specific file, without searching other files.
22 * 2/11/97 aliu Added UErrorCode return values to constructors. Fixed
23 * infinite loops in scanForFile and scanForLocale.
24 * Modified getRawResourceData to not delete storage
25 * in localeData and resourceData which it doesn't own.
26 * Added Mac compatibility #ifdefs for tellp() and
27 * ios::nocreate.
28 * 2/18/97 helena Updated with 100% documentation coverage.
29 * 3/13/97 aliu Rewrote to load in entire resource bundle and store
30 * it as a Hashtable of ResourceBundleData objects.
31 * Added state table to govern parsing of files.
32 * Modified to load locale index out of new file
33 * distinct from default.txt.
34 * 3/25/97 aliu Modified to support 2-d arrays, needed for timezone
35 * data. Added support for custom file suffixes. Again,
36 * needed to support timezone data.
37 * 4/7/97 aliu Cleaned up.
38 * 03/02/99 stephen Removed dependency on FILE*.
39 * 03/29/99 helena Merged Bertrand and Stephen's changes.
40 * 06/11/99 stephen Removed parsing of .txt files.
41 * Reworked to use new binary format.
42 * Cleaned up.
43 * 06/14/99 stephen Removed methods taking a filename suffix.
44 * 11/09/99 weiv Added getLocale(), fRealLocale, removed fRealLocaleID
45 ******************************************************************************
46 */
47
48 #ifndef RESBUND_H
49 #define RESBUND_H
50
51 #include "unicode/utypes.h"
52
53 #if U_SHOW_CPLUSPLUS_API
54
55 #include "unicode/uobject.h"
56 #include "unicode/ures.h"
57 #include "unicode/unistr.h"
58 #include "unicode/locid.h"
59
60 /**
61 * \file
62 * \brief C++ API: Resource Bundle
63 */
64
65 U_NAMESPACE_BEGIN
66
67 /**
68 * A class representing a collection of resource information pertaining to a given
69 * locale. A resource bundle provides a way of accessing locale- specfic information in
70 * a data file. You create a resource bundle that manages the resources for a given
71 * locale and then ask it for individual resources.
72 * <P>
73 * Resource bundles in ICU4C are currently defined using text files which conform to the following
74 * <a href="http://source.icu-project.org/repos/icu/icuhtml/trunk/design/bnf_rb.txt">BNF definition</a>.
75 * More on resource bundle concepts and syntax can be found in the
76 * <a href="http://icu-project.org/userguide/ResourceManagement.html">Users Guide</a>.
77 * <P>
78 *
79 * The ResourceBundle class is not suitable for subclassing.
80 *
81 * @stable ICU 2.0
82 */
83 class U_COMMON_API ResourceBundle : public UObject {
84 public:
85 /**
86 * Constructor
87 *
88 * @param packageName The packageName and locale together point to an ICU udata object,
89 * as defined by <code> udata_open( packageName, "res", locale, err) </code>
90 * or equivalent. Typically, packageName will refer to a (.dat) file, or to
91 * a package registered with udata_setAppData(). Using a full file or directory
92 * pathname for packageName is deprecated.
93 * @param locale This is the locale this resource bundle is for. To get resources
94 * for the French locale, for example, you would create a
95 * ResourceBundle passing Locale::FRENCH for the "locale" parameter,
96 * and all subsequent calls to that resource bundle will return
97 * resources that pertain to the French locale. If the caller doesn't
98 * pass a locale parameter, the default locale for the system (as
99 * returned by Locale::getDefault()) will be used.
100 * @param err The Error Code.
101 * The UErrorCode& err parameter is used to return status information to the user. To
102 * check whether the construction succeeded or not, you should check the value of
103 * U_SUCCESS(err). If you wish more detailed information, you can check for
104 * informational error results which still indicate success. U_USING_FALLBACK_WARNING
105 * indicates that a fall back locale was used. For example, 'de_CH' was requested,
106 * but nothing was found there, so 'de' was used. U_USING_DEFAULT_WARNING indicates that
107 * the default locale data was used; neither the requested locale nor any of its
108 * fall back locales could be found.
109 * @stable ICU 2.0
110 */
111 ResourceBundle(const UnicodeString& packageName,
112 const Locale& locale,
113 UErrorCode& err);
114
115 /**
116 * Construct a resource bundle for the default bundle in the specified package.
117 *
118 * @param packageName The packageName and locale together point to an ICU udata object,
119 * as defined by <code> udata_open( packageName, "res", locale, err) </code>
120 * or equivalent. Typically, packageName will refer to a (.dat) file, or to
121 * a package registered with udata_setAppData(). Using a full file or directory
122 * pathname for packageName is deprecated.
123 * @param err A UErrorCode value
124 * @stable ICU 2.0
125 */
126 ResourceBundle(const UnicodeString& packageName,
127 UErrorCode& err);
128
129 /**
130 * Construct a resource bundle for the ICU default bundle.
131 *
132 * @param err A UErrorCode value
133 * @stable ICU 2.0
134 */
135 ResourceBundle(UErrorCode &err);
136
137 /**
138 * Standard constructor, constructs a resource bundle for the locale-specific
139 * bundle in the specified package.
140 *
141 * @param packageName The packageName and locale together point to an ICU udata object,
142 * as defined by <code> udata_open( packageName, "res", locale, err) </code>
143 * or equivalent. Typically, packageName will refer to a (.dat) file, or to
144 * a package registered with udata_setAppData(). Using a full file or directory
145 * pathname for packageName is deprecated.
146 * NULL is used to refer to ICU data.
147 * @param locale The locale for which to open a resource bundle.
148 * @param err A UErrorCode value
149 * @stable ICU 2.0
150 */
151 ResourceBundle(const char* packageName,
152 const Locale& locale,
153 UErrorCode& err);
154
155 /**
156 * Copy constructor.
157 *
158 * @param original The resource bundle to copy.
159 * @stable ICU 2.0
160 */
161 ResourceBundle(const ResourceBundle &original);
162
163 /**
164 * Constructor from a C UResourceBundle. The resource bundle is
165 * copied and not adopted. ures_close will still need to be used on the
166 * original resource bundle.
167 *
168 * @param res A pointer to the C resource bundle.
169 * @param status A UErrorCode value.
170 * @stable ICU 2.0
171 */
172 ResourceBundle(UResourceBundle *res,
173 UErrorCode &status);
174
175 /**
176 * Assignment operator.
177 *
178 * @param other The resource bundle to copy.
179 * @stable ICU 2.0
180 */
181 ResourceBundle&
182 operator=(const ResourceBundle& other);
183
184 /** Destructor.
185 * @stable ICU 2.0
186 */
187 virtual ~ResourceBundle();
188
189 /**
190 * Clone this object.
191 * Clones can be used concurrently in multiple threads.
192 * If an error occurs, then NULL is returned.
193 * The caller must delete the clone.
194 *
195 * @return a clone of this object
196 *
197 * @see getDynamicClassID
198 * @stable ICU 2.8
199 */
200 ResourceBundle *clone() const;
201
202 /**
203 * Returns the size of a resource. Size for scalar types is always 1, and for vector/table types is
204 * the number of child resources.
205 * @warning Integer array is treated as a scalar type. There are no
206 * APIs to access individual members of an integer array. It
207 * is always returned as a whole.
208 *
209 * @return number of resources in a given resource.
210 * @stable ICU 2.0
211 */
212 int32_t
213 getSize(void) const;
214
215 /**
216 * returns a string from a string resource type
217 *
218 * @param status fills in the outgoing error code
219 * could be <TT>U_MISSING_RESOURCE_ERROR</TT> if the key is not found
220 * could be a warning
221 * e.g.: <TT>U_USING_FALLBACK_WARNING</TT>,<TT>U_USING_DEFAULT_WARNING </TT>
222 * @return a pointer to a zero-terminated char16_t array which lives in a memory mapped/DLL file.
223 * @stable ICU 2.0
224 */
225 UnicodeString
226 getString(UErrorCode& status) const;
227
228 /**
229 * returns a binary data from a resource. Can be used at most primitive resource types (binaries,
230 * strings, ints)
231 *
232 * @param len fills in the length of resulting byte chunk
233 * @param status fills in the outgoing error code
234 * could be <TT>U_MISSING_RESOURCE_ERROR</TT> if the key is not found
235 * could be a warning
236 * e.g.: <TT>U_USING_FALLBACK_WARNING</TT>,<TT>U_USING_DEFAULT_WARNING </TT>
237 * @return a pointer to a chunk of unsigned bytes which live in a memory mapped/DLL file.
238 * @stable ICU 2.0
239 */
240 const uint8_t*
241 getBinary(int32_t& len, UErrorCode& status) const;
242
243
244 /**
245 * returns an integer vector from a resource.
246 *
247 * @param len fills in the length of resulting integer vector
248 * @param status fills in the outgoing error code
249 * could be <TT>U_MISSING_RESOURCE_ERROR</TT> if the key is not found
250 * could be a warning
251 * e.g.: <TT>U_USING_FALLBACK_WARNING</TT>,<TT>U_USING_DEFAULT_WARNING </TT>
252 * @return a pointer to a vector of integers that lives in a memory mapped/DLL file.
253 * @stable ICU 2.0
254 */
255 const int32_t*
256 getIntVector(int32_t& len, UErrorCode& status) const;
257
258 /**
259 * returns an unsigned integer from a resource.
260 * This integer is originally 28 bits.
261 *
262 * @param status fills in the outgoing error code
263 * could be <TT>U_MISSING_RESOURCE_ERROR</TT> if the key is not found
264 * could be a warning
265 * e.g.: <TT>U_USING_FALLBACK_WARNING</TT>,<TT>U_USING_DEFAULT_WARNING </TT>
266 * @return an unsigned integer value
267 * @stable ICU 2.0
268 */
269 uint32_t
270 getUInt(UErrorCode& status) const;
271
272 /**
273 * returns a signed integer from a resource.
274 * This integer is originally 28 bit and the sign gets propagated.
275 *
276 * @param status fills in the outgoing error code
277 * could be <TT>U_MISSING_RESOURCE_ERROR</TT> if the key is not found
278 * could be a warning
279 * e.g.: <TT>U_USING_FALLBACK_WARNING</TT>,<TT>U_USING_DEFAULT_WARNING </TT>
280 * @return a signed integer value
281 * @stable ICU 2.0
282 */
283 int32_t
284 getInt(UErrorCode& status) const;
285
286 /**
287 * Checks whether the resource has another element to iterate over.
288 *
289 * @return TRUE if there are more elements, FALSE if there is no more elements
290 * @stable ICU 2.0
291 */
292 UBool
293 hasNext(void) const;
294
295 /**
296 * Resets the internal context of a resource so that iteration starts from the first element.
297 *
298 * @stable ICU 2.0
299 */
300 void
301 resetIterator(void);
302
303 /**
304 * Returns the key associated with this resource. Not all the resources have a key - only
305 * those that are members of a table.
306 *
307 * @return a key associated to this resource, or NULL if it doesn't have a key
308 * @stable ICU 2.0
309 */
310 const char*
311 getKey(void) const;
312
313 /**
314 * Gets the locale ID of the resource bundle as a string.
315 * Same as getLocale().getName() .
316 *
317 * @return the locale ID of the resource bundle as a string
318 * @stable ICU 2.0
319 */
320 const char*
321 getName(void) const;
322
323
324 /**
325 * Returns the type of a resource. Available types are defined in enum UResType
326 *
327 * @return type of the given resource.
328 * @stable ICU 2.0
329 */
330 UResType
331 getType(void) const;
332
333 /**
334 * Returns the next resource in a given resource or NULL if there are no more resources
335 *
336 * @param status fills in the outgoing error code
337 * @return ResourceBundle object.
338 * @stable ICU 2.0
339 */
340 ResourceBundle
341 getNext(UErrorCode& status);
342
343 /**
344 * Returns the next string in a resource or NULL if there are no more resources
345 * to iterate over.
346 *
347 * @param status fills in the outgoing error code
348 * @return an UnicodeString object.
349 * @stable ICU 2.0
350 */
351 UnicodeString
352 getNextString(UErrorCode& status);
353
354 /**
355 * Returns the next string in a resource or NULL if there are no more resources
356 * to iterate over.
357 *
358 * @param key fill in for key associated with this string
359 * @param status fills in the outgoing error code
360 * @return an UnicodeString object.
361 * @stable ICU 2.0
362 */
363 UnicodeString
364 getNextString(const char ** key,
365 UErrorCode& status);
366
367 /**
368 * Returns the resource in a resource at the specified index.
369 *
370 * @param index an index to the wanted resource.
371 * @param status fills in the outgoing error code
372 * @return ResourceBundle object. If there is an error, resource is invalid.
373 * @stable ICU 2.0
374 */
375 ResourceBundle
376 get(int32_t index,
377 UErrorCode& status) const;
378
379 /**
380 * Returns the string in a given resource at the specified index.
381 *
382 * @param index an index to the wanted string.
383 * @param status fills in the outgoing error code
384 * @return an UnicodeString object. If there is an error, string is bogus
385 * @stable ICU 2.0
386 */
387 UnicodeString
388 getStringEx(int32_t index,
389 UErrorCode& status) const;
390
391 /**
392 * Returns a resource in a resource that has a given key. This procedure works only with table
393 * resources.
394 *
395 * @param key a key associated with the wanted resource
396 * @param status fills in the outgoing error code.
397 * @return ResourceBundle object. If there is an error, resource is invalid.
398 * @stable ICU 2.0
399 */
400 ResourceBundle
401 get(const char* key,
402 UErrorCode& status) const;
403
404 /**
405 * Returns a string in a resource that has a given key. This procedure works only with table
406 * resources.
407 *
408 * @param key a key associated with the wanted string
409 * @param status fills in the outgoing error code
410 * @return an UnicodeString object. If there is an error, string is bogus
411 * @stable ICU 2.0
412 */
413 UnicodeString
414 getStringEx(const char* key,
415 UErrorCode& status) const;
416
417 #ifndef U_HIDE_DEPRECATED_API
418 /**
419 * Return the version number associated with this ResourceBundle as a string. Please
420 * use getVersion, as this method is going to be deprecated.
421 *
422 * @return A version number string as specified in the resource bundle or its parent.
423 * The caller does not own this string.
424 * @see getVersion
425 * @deprecated ICU 2.8 Use getVersion instead.
426 */
427 const char*
428 getVersionNumber(void) const;
429 #endif /* U_HIDE_DEPRECATED_API */
430
431 /**
432 * Return the version number associated with this ResourceBundle as a UVersionInfo array.
433 *
434 * @param versionInfo A UVersionInfo array that is filled with the version number
435 * as specified in the resource bundle or its parent.
436 * @stable ICU 2.0
437 */
438 void
439 getVersion(UVersionInfo versionInfo) const;
440
441 #ifndef U_HIDE_DEPRECATED_API
442 /**
443 * Return the Locale associated with this ResourceBundle.
444 *
445 * @return a Locale object
446 * @deprecated ICU 2.8 Use getLocale(ULocDataLocaleType type, UErrorCode &status) overload instead.
447 */
448 const Locale&
449 getLocale(void) const;
450 #endif /* U_HIDE_DEPRECATED_API */
451
452 /**
453 * Return the Locale associated with this ResourceBundle.
454 * @param type You can choose between requested, valid and actual
455 * locale. For description see the definition of
456 * ULocDataLocaleType in uloc.h
457 * @param status just for catching illegal arguments
458 *
459 * @return a Locale object
460 * @stable ICU 2.8
461 */
462 const Locale
463 getLocale(ULocDataLocaleType type, UErrorCode &status) const;
464 #ifndef U_HIDE_INTERNAL_API
465 /**
466 * This API implements multilevel fallback
467 * @internal
468 */
469 ResourceBundle
470 getWithFallback(const char* key, UErrorCode& status);
471 #endif /* U_HIDE_INTERNAL_API */
472 /**
473 * ICU "poor man's RTTI", returns a UClassID for the actual class.
474 *
475 * @stable ICU 2.2
476 */
477 virtual UClassID getDynamicClassID() const;
478
479 /**
480 * ICU "poor man's RTTI", returns a UClassID for this class.
481 *
482 * @stable ICU 2.2
483 */
484 static UClassID U_EXPORT2 getStaticClassID();
485
486 private:
487 ResourceBundle(); // default constructor not implemented
488
489 UResourceBundle *fResource;
490 void constructForLocale(const UnicodeString& path, const Locale& locale, UErrorCode& error);
491 Locale *fLocale;
492 };
493
494 U_NAMESPACE_END
495
496 #endif /* U_SHOW_CPLUSPLUS_API */
497
498 #endif