1 /* 2 ****************************************************************************** 3 * 4 * Copyright (C) 1999-2009, International Business Machines 5 * Corporation and others. All Rights Reserved. 6 * 7 ****************************************************************************** 8 * file name: udata.c 9 * encoding: US-ASCII 10 * tab size: 8 (not used) 11 * indentation:4 12 * 13 * created on: 1999oct25 14 * created by: Markus W. Scherer 15 */ 16 17 #include "unicode/utypes.h" 18 #include "unicode/putil.h" 19 #include "umutex.h" 20 #include "cmemory.h" 21 #include "cstring.h" 22 #include "unicode/udata.h" 23 #include "unicode/uversion.h" 24 #include "uhash.h" 25 #include "ucln_cmn.h" 26 #include "putilimp.h" 27 28 #include "udatamem.h" 29 #include "umapfile.h" 30 #include "ucmndata.h" 31 32 /*********************************************************************** 33 * 34 * Notes on the organization of the ICU data implementation 35 * 36 * All of the public API is defined in udata.h 37 * 38 * The implementation is split into several files... 39 * 40 * - udata.c (this file) contains higher level code that knows about 41 * the search paths for locating data, caching opened data, etc. 42 * 43 * - umapfile.c contains the low level platform-specific code for actually loading 44 * (memory mapping, file reading, whatever) data into memory. 45 * 46 * - ucmndata.c deals with the tables of contents of ICU data items within 47 * an ICU common format data file. The implementation includes 48 * an abstract interface and support for multiple TOC formats. 49 * All knowledge of any specific TOC format is encapsulated here. 50 * 51 * - udatamem.c has code for managing UDataMemory structs. These are little 52 * descriptor objects for blocks of memory holding ICU data of 53 * various types. 54 */ 55 56 /* configuration ---------------------------------------------------------- */ 57 58 /* If you are excruciatingly bored turn this on .. */ 59 /* #define UDATA_DEBUG 1 */ 60 61 #if defined(UDATA_DEBUG) 62 # include <stdio.h> 63 #endif 64 65 66 /*********************************************************************** 67 * 68 * static (Global) data 69 * 70 ************************************************************************/ 71 static UDataMemory *gCommonICUData = NULL; /* Pointer to the common ICU data. */ 72 /* May be updated once, if we started with */ 73 /* a stub or subset library. */ 74 75 static UDataMemory *gStubICUData = NULL; /* If gCommonICUData does get updated, remember */ 76 /* the original one so that it can be cleaned */ 77 /* up when ICU is shut down. */ 78 79 static UHashtable *gCommonDataCache = NULL; /* Global hash table of opened ICU data files. */ 80 81 static UDataFileAccess gDataFileAccess = UDATA_DEFAULT_ACCESS; 82 83 static UBool U_CALLCONV 84 udata_cleanup(void) 85 { 86 if (gCommonDataCache) { /* Delete the cache of user data mappings. */ 87 uhash_close(gCommonDataCache); /* Table owns the contents, and will delete them. */ 88 gCommonDataCache = NULL; /* Cleanup is not thread safe. */ 89 } 90 91 if (gCommonICUData != NULL) { 92 udata_close(gCommonICUData); /* Clean up common ICU Data */ 93 gCommonICUData = NULL; 94 } 95 96 if (gStubICUData != NULL) { 97 udata_close(gStubICUData); /* Clean up the stub ICU Data */ 98 gStubICUData = NULL; 99 } 100 101 102 return TRUE; /* Everything was cleaned up */ 103 } 104 105 106 107 108 /* 109 * setCommonICUData. Set a UDataMemory to be the global ICU Data 110 */ 111 static void 112 setCommonICUData(UDataMemory *pData, /* The new common data. Belongs to caller, we copy it. */ 113 UDataMemory *oldData, /* Old ICUData ptr. Overwrite of this value is ok, */ 114 /* of any others is not. */ 115 UBool warn, /* If true, set USING_DEFAULT warning if ICUData was */ 116 /* changed by another thread before we got to it. */ 117 UErrorCode *pErr) 118 { 119 UDataMemory *newCommonData = UDataMemory_createNewInstance(pErr); 120 if (U_FAILURE(*pErr)) { 121 return; 122 } 123 124 /* For the assignment, other threads must cleanly see either the old */ 125 /* or the new, not some partially initialized new. The old can not be */ 126 /* deleted - someone may still have a pointer to it lying around in */ 127 /* their locals. */ 128 UDatamemory_assign(newCommonData, pData); 129 umtx_lock(NULL); 130 if (gCommonICUData==oldData) { 131 gStubICUData = gCommonICUData; /* remember the old Common Data, so it can be cleaned up. */ 132 gCommonICUData = newCommonData; 133 ucln_common_registerCleanup(UCLN_COMMON_UDATA, udata_cleanup); 134 } 135 else { 136 if (warn==TRUE) { 137 *pErr = U_USING_DEFAULT_WARNING; 138 } 139 uprv_free(newCommonData); 140 } 141 umtx_unlock(NULL); 142 } 143 144 static const char * 145 findBasename(const char *path) { 146 const char *basename=uprv_strrchr(path, U_FILE_SEP_CHAR); 147 if(basename==NULL) { 148 return path; 149 } else { 150 return basename+1; 151 } 152 } 153 154 #ifdef UDATA_DEBUG 155 static const char * 156 packageNameFromPath(const char *path) 157 { 158 if((path == NULL) || (*path == 0)) { 159 return U_ICUDATA_NAME; 160 } 161 162 path = findBasename(path); 163 164 if((path == NULL) || (*path == 0)) { 165 return U_ICUDATA_NAME; 166 } 167 168 return path; 169 } 170 #endif 171 172 /*----------------------------------------------------------------------* 173 * * 174 * Cache for common data * 175 * Functions for looking up or adding entries to a cache of * 176 * data that has been previously opened. Avoids a potentially * 177 * expensive operation of re-opening the data for subsequent * 178 * uses. * 179 * * 180 * Data remains cached for the duration of the process. * 181 * * 182 *----------------------------------------------------------------------*/ 183 184 typedef struct DataCacheElement { 185 char *name; 186 UDataMemory *item; 187 } DataCacheElement; 188 189 190 191 /* 192 * Deleter function for DataCacheElements. 193 * udata cleanup function closes the hash table; hash table in turn calls back to 194 * here for each entry. 195 */ 196 static void U_CALLCONV DataCacheElement_deleter(void *pDCEl) { 197 DataCacheElement *p = (DataCacheElement *)pDCEl; 198 udata_close(p->item); /* unmaps storage */ 199 uprv_free(p->name); /* delete the hash key string. */ 200 uprv_free(pDCEl); /* delete 'this' */ 201 } 202 203 /* udata_getCacheHashTable() 204 * Get the hash table used to store the data cache entries. 205 * Lazy create it if it doesn't yet exist. 206 */ 207 static UHashtable *udata_getHashTable() { 208 UErrorCode err = U_ZERO_ERROR; 209 UBool cacheIsInitialized; 210 UHashtable *tHT = NULL; 211 212 UMTX_CHECK(NULL, (gCommonDataCache != NULL), cacheIsInitialized); 213 214 if (cacheIsInitialized) { 215 return gCommonDataCache; 216 } 217 218 tHT = uhash_open(uhash_hashChars, uhash_compareChars, NULL, &err); 219 /* Check for null pointer. */ 220 if (tHT == NULL) { 221 return NULL; /* TODO: Handle this error better. */ 222 } 223 uhash_setValueDeleter(tHT, DataCacheElement_deleter); 224 225 umtx_lock(NULL); 226 if (gCommonDataCache == NULL) { 227 gCommonDataCache = tHT; 228 tHT = NULL; 229 ucln_common_registerCleanup(UCLN_COMMON_UDATA, udata_cleanup); 230 } 231 umtx_unlock(NULL); 232 if (tHT != NULL) { 233 uhash_close(tHT); 234 } 235 236 if (U_FAILURE(err)) { 237 return NULL; /* TODO: handle this error better. */ 238 } 239 return gCommonDataCache; 240 } 241 242 243 244 static UDataMemory *udata_findCachedData(const char *path) 245 { 246 UHashtable *htable; 247 UDataMemory *retVal = NULL; 248 DataCacheElement *el; 249 const char *baseName; 250 251 baseName = findBasename(path); /* Cache remembers only the base name, not the full path. */ 252 htable = udata_getHashTable(); 253 umtx_lock(NULL); 254 el = (DataCacheElement *)uhash_get(htable, baseName); 255 umtx_unlock(NULL); 256 if (el != NULL) { 257 retVal = el->item; 258 } 259 #ifdef UDATA_DEBUG 260 fprintf(stderr, "Cache: [%s] -> %p\n", baseName, retVal); 261 #endif 262 return retVal; 263 } 264 265 266 static UDataMemory *udata_cacheDataItem(const char *path, UDataMemory *item, UErrorCode *pErr) { 267 DataCacheElement *newElement; 268 const char *baseName; 269 int32_t nameLen; 270 UHashtable *htable; 271 UDataMemory *oldValue = NULL; 272 UErrorCode subErr = U_ZERO_ERROR; 273 274 if (U_FAILURE(*pErr)) { 275 return NULL; 276 } 277 278 /* Create a new DataCacheElement - the thingy we store in the hash table - 279 * and copy the supplied path and UDataMemoryItems into it. 280 */ 281 newElement = uprv_malloc(sizeof(DataCacheElement)); 282 if (newElement == NULL) { 283 *pErr = U_MEMORY_ALLOCATION_ERROR; 284 return NULL; 285 } 286 newElement->item = UDataMemory_createNewInstance(pErr); 287 if (U_FAILURE(*pErr)) { 288 uprv_free(newElement); 289 return NULL; 290 } 291 UDatamemory_assign(newElement->item, item); 292 293 baseName = findBasename(path); 294 nameLen = (int32_t)uprv_strlen(baseName); 295 newElement->name = uprv_malloc(nameLen+1); 296 if (newElement->name == NULL) { 297 *pErr = U_MEMORY_ALLOCATION_ERROR; 298 uprv_free(newElement->item); 299 uprv_free(newElement); 300 return NULL; 301 } 302 uprv_strcpy(newElement->name, baseName); 303 304 /* Stick the new DataCacheElement into the hash table. 305 */ 306 htable = udata_getHashTable(); 307 umtx_lock(NULL); 308 oldValue = uhash_get(htable, path); 309 if (oldValue != NULL) { 310 subErr = U_USING_DEFAULT_WARNING; 311 } 312 else { 313 uhash_put( 314 htable, 315 newElement->name, /* Key */ 316 newElement, /* Value */ 317 &subErr); 318 } 319 umtx_unlock(NULL); 320 321 #ifdef UDATA_DEBUG 322 fprintf(stderr, "Cache: [%s] <<< %p : %s. vFunc=%p\n", newElement->name, 323 newElement->item, u_errorName(subErr), newElement->item->vFuncs); 324 #endif 325 326 if (subErr == U_USING_DEFAULT_WARNING || U_FAILURE(subErr)) { 327 *pErr = subErr; /* copy sub err unto fillin ONLY if something happens. */ 328 uprv_free(newElement->name); 329 uprv_free(newElement->item); 330 uprv_free(newElement); 331 return oldValue; 332 } 333 334 return newElement->item; 335 } 336 337 338 339 /*------------------------------------------------------------------------------- 340 * 341 * TinyString - a small set of really simple string functions, for 342 * the purpose of consolidating buffer overflow code in one place 343 * 344 * Use wherever you would otherwise declare a fixed sized char[xx] buffer. 345 * Do non-growing ops by accessing fields of struct directly 346 * Grow using the append function to automatically extend buffer 347 * as needed. 348 * 349 *-------------------------------------------------------------------------------*/ 350 typedef struct TinyString { 351 char *s; 352 int32_t length; 353 char fStaticBuf[100]; 354 int32_t fCapacity; 355 } TinyString; 356 357 static void TinyString_init(TinyString *This) { 358 This->s = This->fStaticBuf; 359 *This->s = 0; 360 This->length = 0; 361 This->fCapacity = sizeof(This->fStaticBuf)-1; 362 } 363 364 static void TinyString_append(TinyString *This, const char *what) { 365 int32_t newLen; 366 newLen = This->length + (int32_t)uprv_strlen(what); 367 if (newLen >= This->fCapacity) { 368 int32_t newCapacity = newLen * 2; 369 char *newBuf = (char *)uprv_malloc(newCapacity+1); 370 if (newBuf != NULL) { 371 uprv_strcpy(newBuf, This->s); 372 if (This->s != This->fStaticBuf) { 373 uprv_free(This->s); 374 } 375 This->s = newBuf; 376 This->fCapacity = newCapacity; 377 } 378 } 379 if (newLen < This->fCapacity) { 380 uprv_strcat(This->s+This->length, what); 381 This->length = newLen; 382 } 383 } 384 385 static void TinyString_appendn(TinyString *This, const char *what, int32_t n) { 386 int32_t newLen; 387 newLen = This->length + n; 388 if (newLen >= This->fCapacity) { 389 int32_t newCapacity = newLen * 2; 390 char *newBuf = (char *)uprv_malloc(newCapacity+1); 391 if (newBuf != NULL) { 392 uprv_strcpy(newBuf, This->s); 393 if (This->s != This->fStaticBuf) { 394 uprv_free(This->s); 395 } 396 This->s = newBuf; 397 This->fCapacity = newCapacity; 398 } 399 } 400 if (newLen < This->fCapacity) { 401 uprv_strncat(This->s+This->length, what, n); 402 This->length = newLen; 403 } 404 } 405 406 static void TinyString_dt(TinyString *This) { 407 if (This->s != This->fStaticBuf) { 408 uprv_free(This->s); 409 } 410 TinyString_init(This); 411 } 412 413 414 415 416 /*----------------------------------------------------------------------*============== 417 * * 418 * Path management. Could be shared with other tools/etc if need be * 419 * later on. * 420 * * 421 *----------------------------------------------------------------------*/ 422 423 #define U_DATA_PATHITER_BUFSIZ 128 /* Size of local buffer for paths */ 424 /* Overflow causes malloc of larger buf */ 425 426 typedef struct 427 { 428 const char *path; /* working path (u_icudata_Dir) */ 429 const char *nextPath; /* path following this one */ 430 const char *basename; /* item's basename (icudt22e_mt.res)*/ 431 const char *suffix; /* item suffix (can be null) */ 432 433 uint32_t basenameLen; /* length of basename */ 434 435 char *itemPath; /* path passed in with item name */ 436 char itemPathBuf[U_DATA_PATHITER_BUFSIZ]; 437 438 char *pathBuffer; /* output path for this it'ion */ 439 char pathBufferA[U_DATA_PATHITER_BUFSIZ]; 440 441 char *packageStub; /* example: "/icudt28b". Will ignore that leaf in set paths. */ 442 char packageStubBuf[U_DATA_PATHITER_BUFSIZ]; 443 uint32_t packageStubLen; 444 445 UBool checkLastFour; /* if TRUE then allow paths such as '/foo/myapp.dat' 446 * to match, checks last 4 chars of suffix with 447 * last 4 of path, then previous chars. */ 448 449 } UDataPathIterator; 450 451 /** 452 * Initialize (or re-initialize) a user-supplied UDataPathIterator 453 * Note: UDataPathIterator does not allocate storage, so it doesn't need to be closed. 454 * 455 * @param iter The iterator to be initialized. Its current state does not matter. 456 * @param path The full pathname to be iterated over. If NULL, defaults to U_ICUDATA_NAME 457 * @param pkg Package which is being searched for, ex "icudt28l". Will ignore leave directories such as /icudt28l 458 * @param item Item to be searched for. Can include full path, such as /a/b/foo.dat 459 * @param suffix Optional item suffix, if not-null (ex. ".dat") then 'path' can contain 'item' explicitly. 460 * Ex: 'stuff.dat' would be found in '/a/foo:/tmp/stuff.dat:/bar/baz' as item #2. 461 * '/blarg/stuff.dat' would also be found. 462 */ 463 static void udata_pathiter_init(UDataPathIterator *iter, const char *path, const char *pkg, 464 const char *item, const char *suffix, UBool doCheckLastFour) 465 { 466 #ifdef UDATA_DEBUG 467 fprintf(stderr, "SUFFIX1=%s PATH=%s\n", suffix, path); 468 #endif 469 /** Path **/ 470 if(path == NULL) { 471 iter->path = u_getDataDirectory(); 472 } else { 473 iter->path = path; 474 } 475 476 /** Package **/ 477 if(pkg == NULL) { 478 iter->packageStubLen = 0; 479 iter->packageStub=iter->packageStubBuf; 480 iter->packageStub[0] = 0; 481 } else { 482 if(uprv_strlen(pkg) + 2 > U_DATA_PATHITER_BUFSIZ) { 483 iter->packageStub = uprv_malloc(uprv_strlen(pkg)+2); 484 /* Check for null pointer. */ 485 if (iter->packageStub == NULL) { 486 return; 487 } 488 } else { 489 iter->packageStub = iter->packageStubBuf; 490 } 491 iter->packageStub[0] = U_FILE_SEP_CHAR; 492 uprv_strcpy(iter->packageStub+1, pkg); 493 iter->packageStubLen = (int32_t)uprv_strlen(iter->packageStub); 494 495 #ifdef UDATA_DEBUG 496 fprintf(stderr, "STUB=%s [%d]\n", iter->packageStub, iter->packageStubLen); 497 #endif 498 } 499 500 /** Item **/ 501 iter->basename = findBasename(item); 502 iter->basenameLen = (int32_t)uprv_strlen(iter->basename); 503 504 /** Item path **/ 505 iter->itemPath = iter->itemPathBuf; 506 if(iter->basename == item) { 507 iter->itemPath[0] = 0; 508 iter->nextPath = iter->path; 509 } else { 510 int32_t itemPathLen = (int32_t)(iter->basename-item); 511 if (itemPathLen >= U_DATA_PATHITER_BUFSIZ) { 512 char *t = (char *)uprv_malloc(itemPathLen+1); 513 if (t != NULL) { 514 iter->itemPath = t; 515 } else { 516 /* Malloc failed. Ignore the itemPath. */ 517 itemPathLen = 0; 518 } 519 } 520 uprv_strncpy(iter->itemPath, item, itemPathLen); 521 iter->itemPath[itemPathLen]=0; 522 iter->nextPath = iter->itemPath; 523 } 524 #ifdef UDATA_DEBUG 525 fprintf(stderr, "SUFFIX=%s [%p]\n", suffix, suffix); 526 #endif 527 528 /** Suffix **/ 529 if(suffix != NULL) { 530 iter->suffix = suffix; 531 } else { 532 iter->suffix = ""; 533 } 534 535 iter->checkLastFour = doCheckLastFour; 536 537 /* pathBuffer will hold the output path strings returned by the this iterator 538 * Get an upper bound of possible string size, and make sure that the buffer 539 * is big enough (sum of length of each piece, 2 extra delimiters, + trailing NULL) */ 540 { 541 int32_t maxPathLen = (int32_t)(uprv_strlen(iter->path) + uprv_strlen(item) + uprv_strlen(iter->suffix) + iter->packageStubLen + 3); 542 iter->pathBuffer = iter->pathBufferA; 543 if (maxPathLen >= U_DATA_PATHITER_BUFSIZ) { 544 iter->pathBuffer = (char *)uprv_malloc(maxPathLen); 545 if (iter->pathBuffer == NULL) { 546 iter->pathBuffer = iter->pathBufferA; 547 iter->path = ""; 548 } 549 } 550 } 551 552 #ifdef UDATA_DEBUG 553 fprintf(stderr, "%p: init %s -> [path=%s], [base=%s], [suff=%s], [itempath=%s], [nextpath=%s], [checklast4=%s]\n", 554 iter, 555 item, 556 iter->path, 557 iter->basename, 558 iter->suffix, 559 iter->itemPath, 560 iter->nextPath, 561 iter->checkLastFour?"TRUE":"false"); 562 #endif 563 564 } 565 566 /** 567 * Get the next path on the list. 568 * 569 * @param iter The Iter to be used 570 * @param len If set, pointer to the length of the returned path, for convenience. 571 * @return Pointer to the next path segment, or NULL if there are no more. 572 */ 573 static const char *udata_pathiter_next(UDataPathIterator *iter) 574 { 575 const char *path = NULL; 576 uint32_t pathLen = 0; 577 const char *pathBasename; 578 579 do 580 { 581 if( iter->nextPath == NULL ) { 582 break; 583 } 584 585 path = iter->nextPath; 586 587 if(iter->nextPath == iter->itemPath) { /* we were processing item's path. */ 588 iter->nextPath = iter->path; /* start with regular path next tm. */ 589 pathLen = (int32_t)uprv_strlen(path); 590 } else { 591 /* fix up next for next time */ 592 iter->nextPath = uprv_strchr(path, U_PATH_SEP_CHAR); 593 if(iter->nextPath == NULL) { 594 /* segment: entire path */ 595 pathLen = (int32_t)uprv_strlen(path); 596 } else { 597 /* segment: until next segment */ 598 pathLen = (int32_t)(iter->nextPath - path); 599 if(*iter->nextPath) { /* skip divider */ 600 iter->nextPath ++; 601 } 602 } 603 } 604 605 if(pathLen == 0) { 606 continue; 607 } 608 609 #ifdef UDATA_DEBUG 610 fprintf(stderr, "rest of path (IDD) = %s\n", path); 611 fprintf(stderr, " "); 612 { 613 uint32_t qqq; 614 for(qqq=0;qqq<pathLen;qqq++) 615 { 616 fprintf(stderr, " "); 617 } 618 619 fprintf(stderr, "^\n"); 620 } 621 #endif 622 uprv_strncpy(iter->pathBuffer, path, pathLen); 623 iter->pathBuffer[pathLen] = 0; 624 625 /* check for .dat files */ 626 pathBasename = findBasename(iter->pathBuffer); 627 628 if(iter->checkLastFour == TRUE && 629 (pathLen>=4) && 630 uprv_strncmp(iter->pathBuffer +(pathLen-4),iter->suffix,4)==0 && /* suffix matches */ 631 uprv_strncmp(findBasename(iter->pathBuffer),iter->basename,iter->basenameLen)==0 && /* base matches */ 632 uprv_strlen(pathBasename)==(iter->basenameLen+4)) { /* base+suffix = full len */ 633 634 #ifdef UDATA_DEBUG 635 fprintf(stderr, "Have %s file on the path: %s\n", iter->suffix, iter->pathBuffer); 636 #endif 637 /* do nothing */ 638 } 639 else 640 { /* regular dir path */ 641 if(iter->pathBuffer[pathLen-1] != U_FILE_SEP_CHAR) { 642 if((pathLen>=4) && 643 uprv_strncmp(iter->pathBuffer+(pathLen-4), ".dat", 4) == 0) 644 { 645 #ifdef UDATA_DEBUG 646 fprintf(stderr, "skipping non-directory .dat file %s\n", iter->pathBuffer); 647 #endif 648 continue; 649 } 650 651 /* Check if it is a directory with the same name as our package */ 652 if(iter->packageStubLen && 653 (pathLen > iter->packageStubLen) && 654 !uprv_strcmp(iter->pathBuffer + pathLen - iter->packageStubLen, iter->packageStub)) { 655 #ifdef UDATA_DEBUG 656 fprintf(stderr, "Found stub %s ( will add package %s of len %d)\n", iter->packageStub, iter->basename, iter->basenameLen); 657 #endif 658 pathLen -= iter->packageStubLen; 659 } 660 661 iter->pathBuffer[pathLen++] = U_FILE_SEP_CHAR; 662 } 663 664 uprv_strncpy(iter->pathBuffer + pathLen, /* + basename */ 665 iter->packageStub+1, 666 iter->packageStubLen-1); 667 668 pathLen += iter->packageStubLen-1; 669 670 if(*iter->suffix) /* tack on suffix */ 671 { 672 uprv_strcpy(iter->pathBuffer + pathLen, 673 iter->suffix); 674 pathLen += (int32_t)uprv_strlen(iter->suffix); 675 } 676 677 } 678 679 #ifdef UDATA_DEBUG 680 fprintf(stderr, " --> %s\n", iter->pathBuffer); 681 #endif 682 683 return iter->pathBuffer; 684 685 } while(iter->path); 686 687 /* fell way off the end */ 688 return NULL; 689 } 690 691 692 /* 693 * Path Iterator Destructor. Clean up any allocated storage 694 */ 695 static void udata_pathiter_dt(UDataPathIterator *iter) { 696 if (iter->itemPath != iter->itemPathBuf) { 697 uprv_free(iter->itemPath); 698 iter->itemPath = NULL; 699 } 700 if (iter->pathBuffer != iter->pathBufferA) { 701 uprv_free(iter->pathBuffer); 702 iter->pathBuffer = NULL; 703 } 704 if (iter->packageStub != iter->packageStubBuf) { 705 uprv_free(iter->packageStub); 706 iter->packageStub = NULL; 707 } 708 } 709 710 /* ==================================================================================*/ 711 712 713 /*----------------------------------------------------------------------* 714 * * 715 * Add a static reference to the common data library * 716 * Unless overridden by an explicit udata_setCommonData, this will be * 717 * our common data. * 718 * * 719 *----------------------------------------------------------------------*/ 720 extern const ICU_Data_Header U_DATA_API U_ICUDATA_ENTRY_POINT; 721 722 723 /*----------------------------------------------------------------------* 724 * * 725 * openCommonData Attempt to open a common format (.dat) file * 726 * Map it into memory (if it's not there already) * 727 * and return a UDataMemory object for it. * 728 * * 729 * If the requested data is already open and cached * 730 * just return the cached UDataMem object. * 731 * * 732 *----------------------------------------------------------------------*/ 733 static UDataMemory * 734 openCommonData(const char *path, /* Path from OpenChoice? */ 735 UBool isICUData, /* ICU Data true if path == NULL */ 736 UErrorCode *pErrorCode) 737 { 738 UDataMemory tData; 739 UDataPathIterator iter; 740 const char *pathBuffer; 741 const char *inBasename; 742 743 if (U_FAILURE(*pErrorCode)) { 744 return NULL; 745 } 746 747 UDataMemory_init(&tData); 748 749 /* ??????? TODO revisit this */ 750 if (isICUData) { 751 /* "mini-cache" for common ICU data */ 752 if(gCommonICUData != NULL) { 753 return gCommonICUData; 754 } 755 756 tData.pHeader = &U_ICUDATA_ENTRY_POINT.hdr; 757 udata_checkCommonData(&tData, pErrorCode); 758 setCommonICUData(&tData, NULL, FALSE, pErrorCode); 759 return gCommonICUData; 760 } 761 762 763 /* request is NOT for ICU Data. */ 764 765 /* Find the base name portion of the supplied path. */ 766 /* inBasename will be left pointing somewhere within the original path string. */ 767 inBasename = findBasename(path); 768 #ifdef UDATA_DEBUG 769 fprintf(stderr, "inBasename = %s\n", inBasename); 770 #endif 771 772 if(*inBasename==0) { 773 /* no basename. This will happen if the original path was a directory name, */ 774 /* like "a/b/c/". (Fallback to separate files will still work.) */ 775 #ifdef UDATA_DEBUG 776 fprintf(stderr, "ocd: no basename in %s, bailing.\n", path); 777 #endif 778 *pErrorCode=U_FILE_ACCESS_ERROR; 779 return NULL; 780 } 781 782 /* Is the requested common data file already open and cached? */ 783 /* Note that the cache is keyed by the base name only. The rest of the path, */ 784 /* if any, is not considered. */ 785 { 786 UDataMemory *dataToReturn = udata_findCachedData(inBasename); 787 if (dataToReturn != NULL) { 788 return dataToReturn; 789 } 790 } 791 792 /* Requested item is not in the cache. 793 * Hunt it down, trying all the path locations 794 */ 795 796 udata_pathiter_init(&iter, u_getDataDirectory(), inBasename, path, ".dat", TRUE); 797 798 while((UDataMemory_isLoaded(&tData)==FALSE) && 799 (pathBuffer = udata_pathiter_next(&iter)) != NULL) 800 { 801 #ifdef UDATA_DEBUG 802 fprintf(stderr, "ocd: trying path %s - ", pathBuffer); 803 #endif 804 uprv_mapFile(&tData, pathBuffer); 805 #ifdef UDATA_DEBUG 806 fprintf(stderr, "%s\n", UDataMemory_isLoaded(&tData)?"LOADED":"not loaded"); 807 #endif 808 } 809 udata_pathiter_dt(&iter); /* Note: this call may invalidate "pathBuffer" */ 810 811 #if defined(OS390_STUBDATA) && defined(OS390BATCH) 812 if (!UDataMemory_isLoaded(&tData)) { 813 char ourPathBuffer[1024]; 814 /* One more chance, for extendCommonData() */ 815 uprv_strncpy(ourPathBuffer, path, 1019); 816 ourPathBuffer[1019]=0; 817 uprv_strcat(ourPathBuffer, ".dat"); 818 uprv_mapFile(&tData, ourPathBuffer); 819 } 820 #endif 821 822 if (!UDataMemory_isLoaded(&tData)) { 823 /* no common data */ 824 *pErrorCode=U_FILE_ACCESS_ERROR; 825 return NULL; 826 } 827 828 /* we have mapped a file, check its header */ 829 udata_checkCommonData(&tData, pErrorCode); 830 831 832 /* Cache the UDataMemory struct for this .dat file, 833 * so we won't need to hunt it down and map it again next time 834 * something is needed from it. */ 835 return udata_cacheDataItem(inBasename, &tData, pErrorCode); 836 } 837 838 839 #ifdef OS390 840 # define MAX_STUB_ENTRIES 8 841 #else 842 # define MAX_STUB_ENTRIES 0 843 #endif 844 845 846 /*----------------------------------------------------------------------* 847 * * 848 * extendICUData If the full set of ICU data was not loaded at * 849 * program startup, load it now. This function will * 850 * be called when the lookup of an ICU data item in * 851 * the common ICU data fails. * 852 * * 853 * The parameter is the UDataMemory in which the * 854 * search for a requested item failed. * 855 * * 856 * return true if new data is loaded, false otherwise.* 857 * * 858 *----------------------------------------------------------------------*/ 859 static UBool extendICUData(UDataMemory *failedData, UErrorCode *pErr) 860 { 861 /* If the data library that we are running with turns out to be the 862 * stub library (or, on the 390, the subset library), we will try to 863 * load a .dat file instead. The stub library has no entries in its 864 * TOC, which is how we identify it here. 865 */ 866 UDataMemory *pData; 867 UDataMemory copyPData; 868 869 if (failedData->vFuncs->NumEntries(failedData) > MAX_STUB_ENTRIES) { 870 /* Not the stub. We can't extend. */ 871 return FALSE; 872 } 873 874 /* See if we can explicitly open a .dat file for the ICUData. */ 875 pData = openCommonData( 876 U_ICUDATA_NAME, /* "icudt20l" , for example. */ 877 FALSE, /* Pretend we're not opening ICUData */ 878 pErr); 879 880 /* How about if there is no pData, eh... */ 881 882 UDataMemory_init(©PData); 883 if(pData != NULL) { 884 UDatamemory_assign(©PData, pData); 885 copyPData.map = 0; /* The mapping for this data is owned by the hash table */ 886 copyPData.mapAddr = 0; /* which will unmap it when ICU is shut down. */ 887 /* CommonICUData is also unmapped when ICU is shut down.*/ 888 /* To avoid unmapping the data twice, zero out the map */ 889 /* fields in the UDataMemory that we're assigning */ 890 /* to CommonICUData. */ 891 892 setCommonICUData(©PData, /* The new common data. */ 893 failedData, /* Old ICUData ptr. Overwrite of this value is ok, */ 894 FALSE, /* No warnings if write didn't happen */ 895 pErr); /* setCommonICUData honors errors; NOP if error set */ 896 } 897 898 899 return gCommonICUData != failedData; /* Return true if ICUData pointer was updated. */ 900 /* (Could potentialy have been done by another thread racing */ 901 /* us through here, but that's fine, we still return true */ 902 /* so that current thread will also examine extended data. */ 903 } 904 905 906 907 908 /*----------------------------------------------------------------------* 909 * * 910 * udata_setCommonData * 911 * * 912 *----------------------------------------------------------------------*/ 913 U_CAPI void U_EXPORT2 914 udata_setCommonData(const void *data, UErrorCode *pErrorCode) { 915 UDataMemory dataMemory; 916 917 if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) { 918 return; 919 } 920 921 if(data==NULL) { 922 *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; 923 return; 924 } 925 926 /* do we already have common ICU data set? */ 927 if(gCommonICUData != NULL) { 928 *pErrorCode=U_USING_DEFAULT_WARNING; 929 return; 930 } 931 932 /* set the data pointer and test for validity */ 933 UDataMemory_init(&dataMemory); 934 UDataMemory_setData(&dataMemory, data); 935 udata_checkCommonData(&dataMemory, pErrorCode); 936 if (U_FAILURE(*pErrorCode)) {return;} 937 938 /* we have good data */ 939 /* Set it up as the ICU Common Data. */ 940 setCommonICUData(&dataMemory, NULL, TRUE, pErrorCode); 941 } 942 943 944 945 946 /*--------------------------------------------------------------------------- 947 * 948 * udata_setAppData 949 * 950 *---------------------------------------------------------------------------- */ 951 U_CAPI void U_EXPORT2 952 udata_setAppData(const char *path, const void *data, UErrorCode *err) 953 { 954 UDataMemory udm; 955 956 if(err==NULL || U_FAILURE(*err)) { 957 return; 958 } 959 if(data==NULL) { 960 *err=U_ILLEGAL_ARGUMENT_ERROR; 961 return; 962 } 963 964 UDataMemory_init(&udm); 965 UDataMemory_setData(&udm, data); 966 udata_checkCommonData(&udm, err); 967 udata_cacheDataItem(path, &udm, err); 968 } 969 970 /*----------------------------------------------------------------------------* 971 * * 972 * checkDataItem Given a freshly located/loaded data item, either * 973 * an entry in a common file or a separately loaded file, * 974 * sanity check its header, and see if the data is * 975 * acceptable to the app. * 976 * If the data is good, create and return a UDataMemory * 977 * object that can be returned to the application. * 978 * Return NULL on any sort of failure. * 979 * * 980 *----------------------------------------------------------------------------*/ 981 static UDataMemory * 982 checkDataItem 983 ( 984 const DataHeader *pHeader, /* The data item to be checked. */ 985 UDataMemoryIsAcceptable *isAcceptable, /* App's call-back function */ 986 void *context, /* pass-thru param for above. */ 987 const char *type, /* pass-thru param for above. */ 988 const char *name, /* pass-thru param for above. */ 989 UErrorCode *nonFatalErr, /* Error code if this data was not acceptable */ 990 /* but openChoice should continue with */ 991 /* trying to get data from fallback path. */ 992 UErrorCode *fatalErr /* Bad error, caller should return immediately */ 993 ) 994 { 995 UDataMemory *rDataMem = NULL; /* the new UDataMemory, to be returned. */ 996 997 if (U_FAILURE(*fatalErr)) { 998 return NULL; 999 } 1000 1001 if(pHeader->dataHeader.magic1==0xda && 1002 pHeader->dataHeader.magic2==0x27 && 1003 (isAcceptable==NULL || isAcceptable(context, type, name, &pHeader->info)) 1004 ) { 1005 rDataMem=UDataMemory_createNewInstance(fatalErr); 1006 if (U_FAILURE(*fatalErr)) { 1007 return NULL; 1008 } 1009 rDataMem->pHeader = pHeader; 1010 } else { 1011 /* the data is not acceptable, look further */ 1012 /* If we eventually find something good, this errorcode will be */ 1013 /* cleared out. */ 1014 *nonFatalErr=U_INVALID_FORMAT_ERROR; 1015 } 1016 return rDataMem; 1017 } 1018 1019 /** 1020 * @return 0 if not loaded, 1 if loaded or err 1021 */ 1022 static UDataMemory *doLoadFromIndividualFiles(const char *pkgName, 1023 const char *dataPath, const char *tocEntryPathSuffix, 1024 /* following arguments are the same as doOpenChoice itself */ 1025 const char *path, const char *type, const char *name, 1026 UDataMemoryIsAcceptable *isAcceptable, void *context, 1027 UErrorCode *subErrorCode, 1028 UErrorCode *pErrorCode) 1029 { 1030 UDataMemory *retVal = NULL; 1031 const char *pathBuffer; 1032 UDataMemory dataMemory; 1033 UDataMemory *pEntryData; 1034 1035 UDataPathIterator iter; 1036 /* look in ind. files: package\nam.typ ========================= */ 1037 /* init path iterator for individual files */ 1038 udata_pathiter_init(&iter, dataPath, pkgName, path, tocEntryPathSuffix, FALSE); 1039 1040 while((pathBuffer = udata_pathiter_next(&iter))) 1041 { 1042 #ifdef UDATA_DEBUG 1043 fprintf(stderr, "UDATA: trying individual file %s\n", pathBuffer); 1044 #endif 1045 if(uprv_mapFile(&dataMemory, pathBuffer)) 1046 { 1047 pEntryData = checkDataItem(dataMemory.pHeader, isAcceptable, context, type, name, subErrorCode, pErrorCode); 1048 if (pEntryData != NULL) { 1049 /* Data is good. 1050 * Hand off ownership of the backing memory to the user's UDataMemory. 1051 * and return it. */ 1052 pEntryData->mapAddr = dataMemory.mapAddr; 1053 pEntryData->map = dataMemory.map; 1054 1055 #ifdef UDATA_DEBUG 1056 fprintf(stderr, "** Mapped file: %s\n", pathBuffer); 1057 #endif 1058 retVal = pEntryData; 1059 goto commonReturn; 1060 } 1061 1062 /* the data is not acceptable, or some error occured. Either way, unmap the memory */ 1063 udata_close(&dataMemory); 1064 1065 /* If we had a nasty error, bail out completely. */ 1066 if (U_FAILURE(*pErrorCode)) { 1067 retVal = NULL; 1068 goto commonReturn; 1069 } 1070 1071 /* Otherwise remember that we found data but didn't like it for some reason */ 1072 *subErrorCode=U_INVALID_FORMAT_ERROR; 1073 } 1074 #ifdef UDATA_DEBUG 1075 fprintf(stderr, "%s\n", UDataMemory_isLoaded(&dataMemory)?"LOADED":"not loaded"); 1076 #endif 1077 } 1078 commonReturn: 1079 udata_pathiter_dt(&iter); 1080 return retVal; 1081 } 1082 1083 /** 1084 * @return 0 if not loaded, 1 if loaded or err 1085 */ 1086 static UDataMemory *doLoadFromCommonData(UBool isICUData, const char *pkgName, 1087 const char *dataPath, const char *tocEntryPathSuffix, const char *tocEntryName, 1088 /* following arguments are the same as doOpenChoice itself */ 1089 const char *path, const char *type, const char *name, 1090 UDataMemoryIsAcceptable *isAcceptable, void *context, 1091 UErrorCode *subErrorCode, 1092 UErrorCode *pErrorCode) 1093 { 1094 UDataMemory *retVal = NULL; 1095 UDataMemory *pEntryData; 1096 const DataHeader *pHeader; 1097 UDataMemory *pCommonData; 1098 /* try to get common data. The loop is for platforms such as the 390 that do 1099 * not initially load the full set of ICU data. If the lookup of an ICU data item 1100 * fails, the full (but slower to load) set is loaded, the and the loop repeats, 1101 * trying the lookup again. Once the full set of ICU data is loaded, the loop wont 1102 * repeat because the full set will be checked the first time through. 1103 * 1104 * The loop also handles the fallback to a .dat file if the application linked 1105 * to the stub data library rather than a real library. 1106 */ 1107 for (;;) { 1108 pCommonData=openCommonData(path, isICUData, subErrorCode); /** search for pkg **/ 1109 1110 if(U_SUCCESS(*subErrorCode)) { 1111 int32_t length; 1112 1113 /* look up the data piece in the common data */ 1114 pHeader=pCommonData->vFuncs->Lookup(pCommonData, tocEntryName, &length, subErrorCode); 1115 #ifdef UDATA_DEBUG 1116 fprintf(stderr, "%s: pHeader=%p - %s\n", tocEntryName, pHeader, u_errorName(*subErrorCode)); 1117 #endif 1118 1119 if(pHeader!=NULL) { 1120 pEntryData = checkDataItem(pHeader, isAcceptable, context, type, name, subErrorCode, pErrorCode); 1121 #ifdef UDATA_DEBUG 1122 fprintf(stderr, "pEntryData=%p\n", pEntryData); 1123 #endif 1124 if (U_FAILURE(*pErrorCode)) { 1125 retVal = NULL; 1126 goto commonReturn; 1127 } 1128 if (pEntryData != NULL) { 1129 pEntryData->length = length; 1130 retVal = pEntryData; 1131 goto commonReturn; 1132 } 1133 } 1134 } 1135 /* Data wasn't found. If we were looking for an ICUData item and there is 1136 * more data available, load it and try again, 1137 * otherwise break out of this loop. */ 1138 if (!(isICUData && pCommonData && extendICUData(pCommonData, subErrorCode))) { 1139 break; 1140 } 1141 } 1142 1143 commonReturn: 1144 return retVal; 1145 } 1146 1147 /* 1148 * A note on the ownership of Mapped Memory 1149 * 1150 * For common format files, ownership resides with the UDataMemory object 1151 * that lives in the cache of opened common data. These UDataMemorys are private 1152 * to the udata implementation, and are never seen directly by users. 1153 * 1154 * The UDataMemory objects returned to users will have the address of some desired 1155 * data within the mapped region, but they wont have the mapping info itself, and thus 1156 * won't cause anything to be removed from memory when they are closed. 1157 * 1158 * For individual data files, the UDataMemory returned to the user holds the 1159 * information necessary to unmap the data on close. If the user independently 1160 * opens the same data file twice, two completely independent mappings will be made. 1161 * (There is no cache of opened data items from individual files, only a cache of 1162 * opened Common Data files, that is, files containing a collection of data items.) 1163 * 1164 * For common data passed in from the user via udata_setAppData() or 1165 * udata_setCommonData(), ownership remains with the user. 1166 * 1167 * UDataMemory objects themselves, as opposed to the memory they describe, 1168 * can be anywhere - heap, stack/local or global. 1169 * They have a flag to indicate when they're heap allocated and thus 1170 * must be deleted when closed. 1171 */ 1172 1173 1174 /*----------------------------------------------------------------------------* 1175 * * 1176 * main data loading functions * 1177 * * 1178 *----------------------------------------------------------------------------*/ 1179 static UDataMemory * 1180 doOpenChoice(const char *path, const char *type, const char *name, 1181 UDataMemoryIsAcceptable *isAcceptable, void *context, 1182 UErrorCode *pErrorCode) 1183 { 1184 UDataMemory *retVal = NULL; 1185 1186 TinyString tocEntryName; /* entry name in tree format. ex: 'icudt28b/coll/ar.res' */ 1187 TinyString tocEntryPath; /* entry name in path format. ex: 'icudt28b\\coll\\ar.res' */ 1188 1189 TinyString pkgName; 1190 TinyString treeName; 1191 #if (U_FILE_SEP_CHAR != U_FILE_ALT_SEP_CHAR) /* '/' vs '\' */ 1192 TinyString altSepPath; 1193 #endif 1194 1195 const char *dataPath; 1196 1197 int32_t tocEntrySuffixIndex; 1198 const char *tocEntryPathSuffix; 1199 UErrorCode subErrorCode=U_ZERO_ERROR; 1200 const char *treeChar; 1201 1202 UBool isICUData = FALSE; 1203 1204 1205 /* Is this path ICU data? */ 1206 if(path == NULL || 1207 !strcmp(path, U_ICUDATA_ALIAS) || /* "ICUDATA" */ 1208 !uprv_strncmp(path, U_ICUDATA_NAME U_TREE_SEPARATOR_STRING, /* "icudt26e-" */ 1209 uprv_strlen(U_ICUDATA_NAME U_TREE_SEPARATOR_STRING)) || 1210 !uprv_strncmp(path, U_ICUDATA_ALIAS U_TREE_SEPARATOR_STRING, /* "ICUDATA-" */ 1211 uprv_strlen(U_ICUDATA_ALIAS U_TREE_SEPARATOR_STRING))) { 1212 isICUData = TRUE; 1213 } 1214 1215 #if (U_FILE_SEP_CHAR != U_FILE_ALT_SEP_CHAR) /* Windows: try "foo\bar" and "foo/bar" */ 1216 /* remap from alternate path char to the main one */ 1217 TinyString_init(&altSepPath); 1218 if(path) { 1219 char *p; 1220 if((p=uprv_strchr(path,U_FILE_ALT_SEP_CHAR))) { 1221 TinyString_append(&altSepPath, path); 1222 while((p=uprv_strchr(altSepPath.s,U_FILE_ALT_SEP_CHAR))) { 1223 *p = U_FILE_SEP_CHAR; 1224 } 1225 #if defined (UDATA_DEBUG) 1226 fprintf(stderr, "Changed path from [%s] to [%s]\n", path, altSepPath.s); 1227 #endif 1228 path = altSepPath.s; 1229 } 1230 } 1231 #endif 1232 1233 TinyString_init(&tocEntryName); 1234 TinyString_init(&tocEntryPath); 1235 1236 TinyString_init(&pkgName); 1237 TinyString_init(&treeName); 1238 1239 /* ======= Set up strings */ 1240 if(path==NULL) { 1241 TinyString_append(&pkgName, U_ICUDATA_NAME); 1242 } else { 1243 const char *pkg; 1244 const char *first; 1245 pkg = uprv_strrchr(path, U_FILE_SEP_CHAR); 1246 first = uprv_strchr(path, U_FILE_SEP_CHAR); 1247 if(uprv_pathIsAbsolute(path) || (pkg != first)) { /* more than one slash in the path- not a tree name */ 1248 /* see if this is an /absolute/path/to/package path */ 1249 if(pkg) { 1250 TinyString_append(&pkgName, pkg+1); 1251 } else { 1252 TinyString_append(&pkgName, path); 1253 } 1254 } else { 1255 treeChar = uprv_strchr(path, U_TREE_SEPARATOR); 1256 if(treeChar) { 1257 TinyString_append(&treeName, treeChar+1); /* following '-' */ 1258 if(isICUData) { 1259 TinyString_append(&pkgName, U_ICUDATA_NAME); 1260 } else { 1261 TinyString_appendn(&pkgName, path, (int32_t)(treeChar-path)); 1262 if (first == NULL) { 1263 /* 1264 This user data has no path, but there is a tree name. 1265 Look up the correct path from the data cache later. 1266 */ 1267 path = pkgName.s; 1268 } 1269 } 1270 } else { 1271 if(isICUData) { 1272 TinyString_append(&pkgName, U_ICUDATA_NAME); 1273 } else { 1274 TinyString_append(&pkgName, path); 1275 } 1276 } 1277 } 1278 } 1279 1280 #ifdef UDATA_DEBUG 1281 fprintf(stderr, " P=%s T=%s\n", pkgName.s, treeName.s); 1282 #endif 1283 1284 /* setting up the entry name and file name 1285 * Make up a full name by appending the type to the supplied 1286 * name, assuming that a type was supplied. 1287 */ 1288 1289 /* prepend the package */ 1290 TinyString_append(&tocEntryName, pkgName.s); 1291 TinyString_append(&tocEntryPath, pkgName.s); 1292 tocEntrySuffixIndex = tocEntryName.length; 1293 1294 if(treeName.s[0]) { 1295 TinyString_append(&tocEntryName, U_TREE_ENTRY_SEP_STRING); 1296 TinyString_append(&tocEntryName, treeName.s); 1297 1298 TinyString_append(&tocEntryPath, U_FILE_SEP_STRING); 1299 TinyString_append(&tocEntryPath, treeName.s); 1300 } 1301 1302 TinyString_append(&tocEntryName, U_TREE_ENTRY_SEP_STRING); 1303 TinyString_append(&tocEntryPath, U_FILE_SEP_STRING); 1304 TinyString_append(&tocEntryName, name); 1305 TinyString_append(&tocEntryPath, name); 1306 if(type!=NULL && *type!=0) { 1307 TinyString_append(&tocEntryName, "."); 1308 TinyString_append(&tocEntryName, type); 1309 TinyString_append(&tocEntryPath, "."); 1310 TinyString_append(&tocEntryPath, type); 1311 } 1312 tocEntryPathSuffix = tocEntryPath.s+tocEntrySuffixIndex; /* suffix starts here */ 1313 1314 #ifdef UDATA_DEBUG 1315 fprintf(stderr, " tocEntryName = %s\n", tocEntryName.s); 1316 fprintf(stderr, " tocEntryPath = %s\n", tocEntryName.s); 1317 #endif 1318 1319 if(path == NULL) { 1320 path = COMMON_DATA_NAME; /* "icudt26e" */ 1321 } 1322 1323 /************************ Begin loop looking for ind. files ***************/ 1324 #ifdef UDATA_DEBUG 1325 fprintf(stderr, "IND: inBasename = %s, pkg=%s\n", "(n/a)", packageNameFromPath(path)); 1326 #endif 1327 1328 /* End of dealing with a null basename */ 1329 dataPath = u_getDataDirectory(); 1330 1331 /**** COMMON PACKAGE - only if packages are first. */ 1332 if(gDataFileAccess == UDATA_PACKAGES_FIRST) { 1333 #ifdef UDATA_DEBUG 1334 fprintf(stderr, "Trying packages (UDATA_PACKAGES_FIRST)\n"); 1335 #endif 1336 /* #2 */ 1337 retVal = doLoadFromCommonData(isICUData, 1338 pkgName.s, dataPath, tocEntryPathSuffix, tocEntryName.s, 1339 path, type, name, isAcceptable, context, &subErrorCode, pErrorCode); 1340 if((retVal != NULL) || U_FAILURE(*pErrorCode)) { 1341 goto commonReturn; 1342 } 1343 } 1344 1345 /**** INDIVIDUAL FILES */ 1346 if((gDataFileAccess==UDATA_PACKAGES_FIRST) || 1347 (gDataFileAccess==UDATA_FILES_FIRST)) { 1348 #ifdef UDATA_DEBUG 1349 fprintf(stderr, "Trying individual files\n"); 1350 #endif 1351 /* Check to make sure that there is a dataPath to iterate over */ 1352 if ((dataPath && *dataPath) || !isICUData) { 1353 retVal = doLoadFromIndividualFiles(pkgName.s, dataPath, tocEntryPathSuffix, 1354 path, type, name, isAcceptable, context, &subErrorCode, pErrorCode); 1355 if((retVal != NULL) || U_FAILURE(*pErrorCode)) { 1356 goto commonReturn; 1357 } 1358 } 1359 } 1360 1361 /**** COMMON PACKAGE */ 1362 if((gDataFileAccess==UDATA_ONLY_PACKAGES) || 1363 (gDataFileAccess==UDATA_FILES_FIRST)) { 1364 #ifdef UDATA_DEBUG 1365 fprintf(stderr, "Trying packages (UDATA_ONLY_PACKAGES || UDATA_FILES_FIRST)\n"); 1366 #endif 1367 retVal = doLoadFromCommonData(isICUData, 1368 pkgName.s, dataPath, tocEntryPathSuffix, tocEntryName.s, 1369 path, type, name, isAcceptable, context, &subErrorCode, pErrorCode); 1370 if((retVal != NULL) || U_FAILURE(*pErrorCode)) { 1371 goto commonReturn; 1372 } 1373 } 1374 1375 /* Load from DLL. If we haven't attempted package load, we also haven't had any chance to 1376 try a DLL (static or setCommonData/etc) load. 1377 If we ever have a "UDATA_ONLY_FILES", add it to the or list here. */ 1378 if(gDataFileAccess==UDATA_NO_FILES) { 1379 #ifdef UDATA_DEBUG 1380 fprintf(stderr, "Trying common data (UDATA_NO_FILES)\n"); 1381 #endif 1382 retVal = doLoadFromCommonData(isICUData, 1383 pkgName.s, "", tocEntryPathSuffix, tocEntryName.s, 1384 path, type, name, isAcceptable, context, &subErrorCode, pErrorCode); 1385 if((retVal != NULL) || U_FAILURE(*pErrorCode)) { 1386 goto commonReturn; 1387 } 1388 } 1389 1390 /* data not found */ 1391 if(U_SUCCESS(*pErrorCode)) { 1392 if(U_SUCCESS(subErrorCode)) { 1393 /* file not found */ 1394 *pErrorCode=U_FILE_ACCESS_ERROR; 1395 } else { 1396 /* entry point not found or rejected */ 1397 *pErrorCode=subErrorCode; 1398 } 1399 } 1400 1401 commonReturn: 1402 TinyString_dt(&tocEntryName); 1403 TinyString_dt(&tocEntryPath); 1404 TinyString_dt(&pkgName); 1405 TinyString_dt(&treeName); 1406 #if (U_FILE_SEP_CHAR != U_FILE_ALT_SEP_CHAR) 1407 TinyString_dt(&altSepPath); 1408 #endif 1409 return retVal; 1410 } 1411 1412 1413 1414 /* API ---------------------------------------------------------------------- */ 1415 1416 U_CAPI UDataMemory * U_EXPORT2 1417 udata_open(const char *path, const char *type, const char *name, 1418 UErrorCode *pErrorCode) { 1419 #ifdef UDATA_DEBUG 1420 fprintf(stderr, "udata_open(): Opening: %s : %s . %s\n", (path?path:"NULL"), name, type); 1421 fflush(stderr); 1422 #endif 1423 1424 if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) { 1425 return NULL; 1426 } else if(name==NULL || *name==0) { 1427 *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; 1428 return NULL; 1429 } else { 1430 return doOpenChoice(path, type, name, NULL, NULL, pErrorCode); 1431 } 1432 } 1433 1434 1435 1436 U_CAPI UDataMemory * U_EXPORT2 1437 udata_openChoice(const char *path, const char *type, const char *name, 1438 UDataMemoryIsAcceptable *isAcceptable, void *context, 1439 UErrorCode *pErrorCode) { 1440 #ifdef UDATA_DEBUG 1441 fprintf(stderr, "udata_openChoice(): Opening: %s : %s . %s\n", (path?path:"NULL"), name, type); 1442 #endif 1443 1444 if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) { 1445 return NULL; 1446 } else if(name==NULL || *name==0 || isAcceptable==NULL) { 1447 *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; 1448 return NULL; 1449 } else { 1450 return doOpenChoice(path, type, name, isAcceptable, context, pErrorCode); 1451 } 1452 } 1453 1454 1455 1456 U_CAPI void U_EXPORT2 1457 udata_getInfo(UDataMemory *pData, UDataInfo *pInfo) { 1458 if(pInfo!=NULL) { 1459 if(pData!=NULL && pData->pHeader!=NULL) { 1460 const UDataInfo *info=&pData->pHeader->info; 1461 uint16_t dataInfoSize=udata_getInfoSize(info); 1462 if(pInfo->size>dataInfoSize) { 1463 pInfo->size=dataInfoSize; 1464 } 1465 uprv_memcpy((uint16_t *)pInfo+1, (const uint16_t *)info+1, pInfo->size-2); 1466 if(info->isBigEndian!=U_IS_BIG_ENDIAN) { 1467 /* opposite endianness */ 1468 uint16_t x=info->reservedWord; 1469 pInfo->reservedWord=(uint16_t)((x<<8)|(x>>8)); 1470 } 1471 } else { 1472 pInfo->size=0; 1473 } 1474 } 1475 } 1476 1477 1478 U_CAPI void U_EXPORT2 udata_setFileAccess(UDataFileAccess access, UErrorCode *status) 1479 { 1480 gDataFileAccess = access; 1481 } 1482 1483
