| /* |
| ****************************************************************************** |
| * |
| * Copyright (C) 1999-2012, International Business Machines |
| * Corporation and others. All Rights Reserved. |
| * |
| ****************************************************************************** |
| * file name: udata.cpp |
| * encoding: US-ASCII |
| * tab size: 8 (not used) |
| * indentation:4 |
| * |
| * created on: 1999oct25 |
| * created by: Markus W. Scherer |
| */ |
| |
| #include "unicode/utypes.h" /* U_PLATFORM etc. */ |
| |
| #ifdef __GNUC__ |
| /* if gcc |
| #define ATTRIBUTE_WEAK __attribute__ ((weak)) |
| might have to #include some other header |
| */ |
| #endif |
| |
| #include "unicode/putil.h" |
| #include "unicode/udata.h" |
| #include "unicode/uversion.h" |
| #include "charstr.h" |
| #include "cmemory.h" |
| #include "cstring.h" |
| #include "putilimp.h" |
| #include "ucln_cmn.h" |
| #include "ucmndata.h" |
| #include "udatamem.h" |
| #include "uhash.h" |
| #include "umapfile.h" |
| #include "umutex.h" |
| |
| /*********************************************************************** |
| * |
| * Notes on the organization of the ICU data implementation |
| * |
| * All of the public API is defined in udata.h |
| * |
| * The implementation is split into several files... |
| * |
| * - udata.c (this file) contains higher level code that knows about |
| * the search paths for locating data, caching opened data, etc. |
| * |
| * - umapfile.c contains the low level platform-specific code for actually loading |
| * (memory mapping, file reading, whatever) data into memory. |
| * |
| * - ucmndata.c deals with the tables of contents of ICU data items within |
| * an ICU common format data file. The implementation includes |
| * an abstract interface and support for multiple TOC formats. |
| * All knowledge of any specific TOC format is encapsulated here. |
| * |
| * - udatamem.c has code for managing UDataMemory structs. These are little |
| * descriptor objects for blocks of memory holding ICU data of |
| * various types. |
| */ |
| |
| /* configuration ---------------------------------------------------------- */ |
| |
| /* If you are excruciatingly bored turn this on .. */ |
| /* #define UDATA_DEBUG 1 */ |
| |
| #if defined(UDATA_DEBUG) |
| # include <stdio.h> |
| #endif |
| |
| #define LENGTHOF(array) (int32_t)(sizeof(array)/sizeof((array)[0])) |
| |
| U_NAMESPACE_USE |
| |
| /* |
| * Forward declarations |
| */ |
| static UDataMemory *udata_findCachedData(const char *path); |
| |
| /*********************************************************************** |
| * |
| * static (Global) data |
| * |
| ************************************************************************/ |
| |
| /* |
| * Pointers to the common ICU data. |
| * |
| * We store multiple pointers to ICU data packages and iterate through them |
| * when looking for a data item. |
| * |
| * It is possible to combine this with dependency inversion: |
| * One or more data package libraries may export |
| * functions that each return a pointer to their piece of the ICU data, |
| * and this file would import them as weak functions, without a |
| * strong linker dependency from the common library on the data library. |
| * |
| * Then we can have applications depend on only that part of ICU's data |
| * that they really need, reducing the size of binaries that take advantage |
| * of this. |
| */ |
| static UDataMemory *gCommonICUDataArray[10] = { NULL }; |
| |
| static UBool gHaveTriedToLoadCommonData = FALSE; /* See extendICUData(). */ |
| |
| static UHashtable *gCommonDataCache = NULL; /* Global hash table of opened ICU data files. */ |
| |
| static UDataFileAccess gDataFileAccess = UDATA_DEFAULT_ACCESS; |
| |
| static UBool U_CALLCONV |
| udata_cleanup(void) |
| { |
| int32_t i; |
| |
| if (gCommonDataCache) { /* Delete the cache of user data mappings. */ |
| uhash_close(gCommonDataCache); /* Table owns the contents, and will delete them. */ |
| gCommonDataCache = NULL; /* Cleanup is not thread safe. */ |
| } |
| |
| for (i = 0; i < LENGTHOF(gCommonICUDataArray) && gCommonICUDataArray[i] != NULL; ++i) { |
| udata_close(gCommonICUDataArray[i]); |
| gCommonICUDataArray[i] = NULL; |
| } |
| gHaveTriedToLoadCommonData = FALSE; |
| |
| return TRUE; /* Everything was cleaned up */ |
| } |
| |
| static UBool U_CALLCONV |
| findCommonICUDataByName(const char *inBasename) |
| { |
| UBool found = FALSE; |
| int32_t i; |
| |
| UDataMemory *pData = udata_findCachedData(inBasename); |
| if (pData == NULL) |
| return FALSE; |
| |
| for (i = 0; i < LENGTHOF(gCommonICUDataArray); ++i) { |
| if ((gCommonICUDataArray[i] != NULL) && (gCommonICUDataArray[i]->pHeader == pData->pHeader)) { |
| /* The data pointer is already in the array. */ |
| found = TRUE; |
| break; |
| } |
| } |
| |
| return found; |
| } |
| |
| |
| /* |
| * setCommonICUData. Set a UDataMemory to be the global ICU Data |
| */ |
| static UBool |
| setCommonICUData(UDataMemory *pData, /* The new common data. Belongs to caller, we copy it. */ |
| UBool warn, /* If true, set USING_DEFAULT warning if ICUData was */ |
| /* changed by another thread before we got to it. */ |
| UErrorCode *pErr) |
| { |
| UDataMemory *newCommonData = UDataMemory_createNewInstance(pErr); |
| int32_t i; |
| UBool didUpdate = FALSE; |
| if (U_FAILURE(*pErr)) { |
| return FALSE; |
| } |
| |
| /* For the assignment, other threads must cleanly see either the old */ |
| /* or the new, not some partially initialized new. The old can not be */ |
| /* deleted - someone may still have a pointer to it lying around in */ |
| /* their locals. */ |
| UDatamemory_assign(newCommonData, pData); |
| umtx_lock(NULL); |
| for (i = 0; i < LENGTHOF(gCommonICUDataArray); ++i) { |
| if (gCommonICUDataArray[i] == NULL) { |
| gCommonICUDataArray[i] = newCommonData; |
| ucln_common_registerCleanup(UCLN_COMMON_UDATA, udata_cleanup); |
| didUpdate = TRUE; |
| break; |
| } else if (gCommonICUDataArray[i]->pHeader == pData->pHeader) { |
| /* The same data pointer is already in the array. */ |
| break; |
| } |
| } |
| umtx_unlock(NULL); |
| |
| if (i == LENGTHOF(gCommonICUDataArray) && warn) { |
| *pErr = U_USING_DEFAULT_WARNING; |
| } |
| if (!didUpdate) { |
| uprv_free(newCommonData); |
| } |
| return didUpdate; |
| } |
| |
| static UBool |
| setCommonICUDataPointer(const void *pData, UBool /*warn*/, UErrorCode *pErrorCode) { |
| UDataMemory tData; |
| UDataMemory_init(&tData); |
| tData.pHeader = (const DataHeader *)pData; |
| udata_checkCommonData(&tData, pErrorCode); |
| return setCommonICUData(&tData, FALSE, pErrorCode); |
| } |
| |
| static const char * |
| findBasename(const char *path) { |
| const char *basename=uprv_strrchr(path, U_FILE_SEP_CHAR); |
| if(basename==NULL) { |
| return path; |
| } else { |
| return basename+1; |
| } |
| } |
| |
| #ifdef UDATA_DEBUG |
| static const char * |
| packageNameFromPath(const char *path) |
| { |
| if((path == NULL) || (*path == 0)) { |
| return U_ICUDATA_NAME; |
| } |
| |
| path = findBasename(path); |
| |
| if((path == NULL) || (*path == 0)) { |
| return U_ICUDATA_NAME; |
| } |
| |
| return path; |
| } |
| #endif |
| |
| /*----------------------------------------------------------------------* |
| * * |
| * Cache for common data * |
| * Functions for looking up or adding entries to a cache of * |
| * data that has been previously opened. Avoids a potentially * |
| * expensive operation of re-opening the data for subsequent * |
| * uses. * |
| * * |
| * Data remains cached for the duration of the process. * |
| * * |
| *----------------------------------------------------------------------*/ |
| |
| typedef struct DataCacheElement { |
| char *name; |
| UDataMemory *item; |
| } DataCacheElement; |
| |
| |
| |
| /* |
| * Deleter function for DataCacheElements. |
| * udata cleanup function closes the hash table; hash table in turn calls back to |
| * here for each entry. |
| */ |
| static void U_CALLCONV DataCacheElement_deleter(void *pDCEl) { |
| DataCacheElement *p = (DataCacheElement *)pDCEl; |
| udata_close(p->item); /* unmaps storage */ |
| uprv_free(p->name); /* delete the hash key string. */ |
| uprv_free(pDCEl); /* delete 'this' */ |
| } |
| |
| /* udata_getCacheHashTable() |
| * Get the hash table used to store the data cache entries. |
| * Lazy create it if it doesn't yet exist. |
| */ |
| static UHashtable *udata_getHashTable() { |
| UErrorCode err = U_ZERO_ERROR; |
| UBool cacheIsInitialized; |
| UHashtable *tHT = NULL; |
| |
| UMTX_CHECK(NULL, (gCommonDataCache != NULL), cacheIsInitialized); |
| |
| if (cacheIsInitialized) { |
| return gCommonDataCache; |
| } |
| |
| tHT = uhash_open(uhash_hashChars, uhash_compareChars, NULL, &err); |
| /* Check for null pointer. */ |
| if (tHT == NULL) { |
| return NULL; /* TODO: Handle this error better. */ |
| } |
| uhash_setValueDeleter(tHT, DataCacheElement_deleter); |
| |
| umtx_lock(NULL); |
| if (gCommonDataCache == NULL) { |
| gCommonDataCache = tHT; |
| tHT = NULL; |
| ucln_common_registerCleanup(UCLN_COMMON_UDATA, udata_cleanup); |
| } |
| umtx_unlock(NULL); |
| if (tHT != NULL) { |
| uhash_close(tHT); |
| } |
| |
| if (U_FAILURE(err)) { |
| return NULL; /* TODO: handle this error better. */ |
| } |
| return gCommonDataCache; |
| } |
| |
| |
| |
| static UDataMemory *udata_findCachedData(const char *path) |
| { |
| UHashtable *htable; |
| UDataMemory *retVal = NULL; |
| DataCacheElement *el; |
| const char *baseName; |
| |
| baseName = findBasename(path); /* Cache remembers only the base name, not the full path. */ |
| htable = udata_getHashTable(); |
| umtx_lock(NULL); |
| el = (DataCacheElement *)uhash_get(htable, baseName); |
| umtx_unlock(NULL); |
| if (el != NULL) { |
| retVal = el->item; |
| } |
| #ifdef UDATA_DEBUG |
| fprintf(stderr, "Cache: [%s] -> %p\n", baseName, retVal); |
| #endif |
| return retVal; |
| } |
| |
| |
| static UDataMemory *udata_cacheDataItem(const char *path, UDataMemory *item, UErrorCode *pErr) { |
| DataCacheElement *newElement; |
| const char *baseName; |
| int32_t nameLen; |
| UHashtable *htable; |
| DataCacheElement *oldValue = NULL; |
| UErrorCode subErr = U_ZERO_ERROR; |
| |
| if (U_FAILURE(*pErr)) { |
| return NULL; |
| } |
| |
| /* Create a new DataCacheElement - the thingy we store in the hash table - |
| * and copy the supplied path and UDataMemoryItems into it. |
| */ |
| newElement = (DataCacheElement *)uprv_malloc(sizeof(DataCacheElement)); |
| if (newElement == NULL) { |
| *pErr = U_MEMORY_ALLOCATION_ERROR; |
| return NULL; |
| } |
| newElement->item = UDataMemory_createNewInstance(pErr); |
| if (U_FAILURE(*pErr)) { |
| uprv_free(newElement); |
| return NULL; |
| } |
| UDatamemory_assign(newElement->item, item); |
| |
| baseName = findBasename(path); |
| nameLen = (int32_t)uprv_strlen(baseName); |
| newElement->name = (char *)uprv_malloc(nameLen+1); |
| if (newElement->name == NULL) { |
| *pErr = U_MEMORY_ALLOCATION_ERROR; |
| uprv_free(newElement->item); |
| uprv_free(newElement); |
| return NULL; |
| } |
| uprv_strcpy(newElement->name, baseName); |
| |
| /* Stick the new DataCacheElement into the hash table. |
| */ |
| htable = udata_getHashTable(); |
| umtx_lock(NULL); |
| oldValue = (DataCacheElement *)uhash_get(htable, path); |
| if (oldValue != NULL) { |
| subErr = U_USING_DEFAULT_WARNING; |
| } |
| else { |
| uhash_put( |
| htable, |
| newElement->name, /* Key */ |
| newElement, /* Value */ |
| &subErr); |
| } |
| umtx_unlock(NULL); |
| |
| #ifdef UDATA_DEBUG |
| fprintf(stderr, "Cache: [%s] <<< %p : %s. vFunc=%p\n", newElement->name, |
| newElement->item, u_errorName(subErr), newElement->item->vFuncs); |
| #endif |
| |
| if (subErr == U_USING_DEFAULT_WARNING || U_FAILURE(subErr)) { |
| *pErr = subErr; /* copy sub err unto fillin ONLY if something happens. */ |
| uprv_free(newElement->name); |
| uprv_free(newElement->item); |
| uprv_free(newElement); |
| return oldValue ? oldValue->item : NULL; |
| } |
| |
| return newElement->item; |
| } |
| |
| /*----------------------------------------------------------------------*============== |
| * * |
| * Path management. Could be shared with other tools/etc if need be * |
| * later on. * |
| * * |
| *----------------------------------------------------------------------*/ |
| |
| #define U_DATA_PATHITER_BUFSIZ 128 /* Size of local buffer for paths */ |
| /* Overflow causes malloc of larger buf */ |
| |
| U_NAMESPACE_BEGIN |
| |
| class UDataPathIterator |
| { |
| public: |
| UDataPathIterator(const char *path, const char *pkg, |
| const char *item, const char *suffix, UBool doCheckLastFour, |
| UErrorCode *pErrorCode); |
| const char *next(UErrorCode *pErrorCode); |
| |
| private: |
| const char *path; /* working path (u_icudata_Dir) */ |
| const char *nextPath; /* path following this one */ |
| const char *basename; /* item's basename (icudt22e_mt.res)*/ |
| const char *suffix; /* item suffix (can be null) */ |
| |
| uint32_t basenameLen; /* length of basename */ |
| |
| CharString itemPath; /* path passed in with item name */ |
| CharString pathBuffer; /* output path for this it'ion */ |
| CharString packageStub; /* example: "/icudt28b". Will ignore that leaf in set paths. */ |
| |
| UBool checkLastFour; /* if TRUE then allow paths such as '/foo/myapp.dat' |
| * to match, checks last 4 chars of suffix with |
| * last 4 of path, then previous chars. */ |
| }; |
| |
| /** |
| * @param iter The iterator to be initialized. Its current state does not matter. |
| * @param path The full pathname to be iterated over. If NULL, defaults to U_ICUDATA_NAME |
| * @param pkg Package which is being searched for, ex "icudt28l". Will ignore leave directories such as /icudt28l |
| * @param item Item to be searched for. Can include full path, such as /a/b/foo.dat |
| * @param suffix Optional item suffix, if not-null (ex. ".dat") then 'path' can contain 'item' explicitly. |
| * Ex: 'stuff.dat' would be found in '/a/foo:/tmp/stuff.dat:/bar/baz' as item #2. |
| * '/blarg/stuff.dat' would also be found. |
| */ |
| UDataPathIterator::UDataPathIterator(const char *inPath, const char *pkg, |
| const char *item, const char *inSuffix, UBool doCheckLastFour, |
| UErrorCode *pErrorCode) |
| { |
| #ifdef UDATA_DEBUG |
| fprintf(stderr, "SUFFIX1=%s PATH=%s\n", inSuffix, inPath); |
| #endif |
| /** Path **/ |
| if(inPath == NULL) { |
| path = u_getDataDirectory(); |
| } else { |
| path = inPath; |
| } |
| |
| /** Package **/ |
| if(pkg != NULL) { |
| packageStub.append(U_FILE_SEP_CHAR, *pErrorCode).append(pkg, *pErrorCode); |
| #ifdef UDATA_DEBUG |
| fprintf(stderr, "STUB=%s [%d]\n", packageStub.data(), packageStub.length()); |
| #endif |
| } |
| |
| /** Item **/ |
| basename = findBasename(item); |
| basenameLen = (int32_t)uprv_strlen(basename); |
| |
| /** Item path **/ |
| if(basename == item) { |
| nextPath = path; |
| } else { |
| itemPath.append(item, (int32_t)(basename-item), *pErrorCode); |
| nextPath = itemPath.data(); |
| } |
| #ifdef UDATA_DEBUG |
| fprintf(stderr, "SUFFIX=%s [%p]\n", inSuffix, inSuffix); |
| #endif |
| |
| /** Suffix **/ |
| if(inSuffix != NULL) { |
| suffix = inSuffix; |
| } else { |
| suffix = ""; |
| } |
| |
| checkLastFour = doCheckLastFour; |
| |
| /* pathBuffer will hold the output path strings returned by this iterator */ |
| |
| #ifdef UDATA_DEBUG |
| fprintf(stderr, "%p: init %s -> [path=%s], [base=%s], [suff=%s], [itempath=%s], [nextpath=%s], [checklast4=%s]\n", |
| iter, |
| item, |
| path, |
| basename, |
| suffix, |
| itemPath.data(), |
| nextPath, |
| checkLastFour?"TRUE":"false"); |
| #endif |
| } |
| |
| /** |
| * Get the next path on the list. |
| * |
| * @param iter The Iter to be used |
| * @param len If set, pointer to the length of the returned path, for convenience. |
| * @return Pointer to the next path segment, or NULL if there are no more. |
| */ |
| const char *UDataPathIterator::next(UErrorCode *pErrorCode) |
| { |
| if(U_FAILURE(*pErrorCode)) { |
| return NULL; |
| } |
| |
| const char *currentPath = NULL; |
| int32_t pathLen = 0; |
| const char *pathBasename; |
| |
| do |
| { |
| if( nextPath == NULL ) { |
| break; |
| } |
| currentPath = nextPath; |
| |
| if(nextPath == itemPath.data()) { /* we were processing item's path. */ |
| nextPath = path; /* start with regular path next tm. */ |
| pathLen = (int32_t)uprv_strlen(currentPath); |
| } else { |
| /* fix up next for next time */ |
| nextPath = uprv_strchr(currentPath, U_PATH_SEP_CHAR); |
| if(nextPath == NULL) { |
| /* segment: entire path */ |
| pathLen = (int32_t)uprv_strlen(currentPath); |
| } else { |
| /* segment: until next segment */ |
| pathLen = (int32_t)(nextPath - currentPath); |
| /* skip divider */ |
| nextPath ++; |
| } |
| } |
| |
| if(pathLen == 0) { |
| continue; |
| } |
| |
| #ifdef UDATA_DEBUG |
| fprintf(stderr, "rest of path (IDD) = %s\n", currentPath); |
| fprintf(stderr, " "); |
| { |
| uint32_t qqq; |
| for(qqq=0;qqq<pathLen;qqq++) |
| { |
| fprintf(stderr, " "); |
| } |
| |
| fprintf(stderr, "^\n"); |
| } |
| #endif |
| pathBuffer.clear().append(currentPath, pathLen, *pErrorCode); |
| |
| /* check for .dat files */ |
| pathBasename = findBasename(pathBuffer.data()); |
| |
| if(checkLastFour == TRUE && |
| (pathLen>=4) && |
| uprv_strncmp(pathBuffer.data() +(pathLen-4), suffix, 4)==0 && /* suffix matches */ |
| uprv_strncmp(findBasename(pathBuffer.data()), basename, basenameLen)==0 && /* base matches */ |
| uprv_strlen(pathBasename)==(basenameLen+4)) { /* base+suffix = full len */ |
| |
| #ifdef UDATA_DEBUG |
| fprintf(stderr, "Have %s file on the path: %s\n", suffix, pathBuffer.data()); |
| #endif |
| /* do nothing */ |
| } |
| else |
| { /* regular dir path */ |
| if(pathBuffer[pathLen-1] != U_FILE_SEP_CHAR) { |
| if((pathLen>=4) && |
| uprv_strncmp(pathBuffer.data()+(pathLen-4), ".dat", 4) == 0) |
| { |
| #ifdef UDATA_DEBUG |
| fprintf(stderr, "skipping non-directory .dat file %s\n", pathBuffer.data()); |
| #endif |
| continue; |
| } |
| |
| /* Check if it is a directory with the same name as our package */ |
| if(!packageStub.isEmpty() && |
| (pathLen > packageStub.length()) && |
| !uprv_strcmp(pathBuffer.data() + pathLen - packageStub.length(), packageStub.data())) { |
| #ifdef UDATA_DEBUG |
| fprintf(stderr, "Found stub %s (will add package %s of len %d)\n", packageStub.data(), basename, basenameLen); |
| #endif |
| pathBuffer.truncate(pathLen - packageStub.length()); |
| } |
| pathBuffer.append(U_FILE_SEP_CHAR, *pErrorCode); |
| } |
| |
| /* + basename */ |
| pathBuffer.append(packageStub.data()+1, packageStub.length()-1, *pErrorCode); |
| |
| if(*suffix) /* tack on suffix */ |
| { |
| pathBuffer.append(suffix, *pErrorCode); |
| } |
| } |
| |
| #ifdef UDATA_DEBUG |
| fprintf(stderr, " --> %s\n", pathBuffer.data()); |
| #endif |
| |
| return pathBuffer.data(); |
| |
| } while(path); |
| |
| /* fell way off the end */ |
| return NULL; |
| } |
| |
| U_NAMESPACE_END |
| |
| /* ==================================================================================*/ |
| |
| |
| /*----------------------------------------------------------------------* |
| * * |
| * Add a static reference to the common data library * |
| * Unless overridden by an explicit udata_setCommonData, this will be * |
| * our common data. * |
| * * |
| *----------------------------------------------------------------------*/ |
| extern "C" const DataHeader U_DATA_API U_ICUDATA_ENTRY_POINT; |
| |
| /* |
| * This would be a good place for weak-linkage declarations of |
| * partial-data-library access functions where each returns a pointer |
| * to its data package, if it is linked in. |
| */ |
| /* |
| extern const void *uprv_getICUData_collation(void) ATTRIBUTE_WEAK; |
| extern const void *uprv_getICUData_conversion(void) ATTRIBUTE_WEAK; |
| */ |
| |
| /*----------------------------------------------------------------------* |
| * * |
| * openCommonData Attempt to open a common format (.dat) file * |
| * Map it into memory (if it's not there already) * |
| * and return a UDataMemory object for it. * |
| * * |
| * If the requested data is already open and cached * |
| * just return the cached UDataMem object. * |
| * * |
| *----------------------------------------------------------------------*/ |
| static UDataMemory * |
| openCommonData(const char *path, /* Path from OpenChoice? */ |
| int32_t commonDataIndex, /* ICU Data (index >= 0) if path == NULL */ |
| UErrorCode *pErrorCode) |
| { |
| UDataMemory tData; |
| const char *pathBuffer; |
| const char *inBasename; |
| |
| if (U_FAILURE(*pErrorCode)) { |
| return NULL; |
| } |
| |
| UDataMemory_init(&tData); |
| |
| /* ??????? TODO revisit this */ |
| if (commonDataIndex >= 0) { |
| /* "mini-cache" for common ICU data */ |
| if(commonDataIndex >= LENGTHOF(gCommonICUDataArray)) { |
| return NULL; |
| } |
| if(gCommonICUDataArray[commonDataIndex] == NULL) { |
| int32_t i; |
| for(i = 0; i < commonDataIndex; ++i) { |
| if(gCommonICUDataArray[i]->pHeader == &U_ICUDATA_ENTRY_POINT) { |
| /* The linked-in data is already in the list. */ |
| return NULL; |
| } |
| } |
| |
| /* Add the linked-in data to the list. */ |
| /* |
| * This is where we would check and call weakly linked partial-data-library |
| * access functions. |
| */ |
| /* |
| if (uprv_getICUData_collation) { |
| setCommonICUDataPointer(uprv_getICUData_collation(), FALSE, pErrorCode); |
| } |
| if (uprv_getICUData_conversion) { |
| setCommonICUDataPointer(uprv_getICUData_conversion(), FALSE, pErrorCode); |
| } |
| */ |
| setCommonICUDataPointer(&U_ICUDATA_ENTRY_POINT, FALSE, pErrorCode); |
| } |
| return gCommonICUDataArray[commonDataIndex]; |
| } |
| |
| |
| /* request is NOT for ICU Data. */ |
| |
| /* Find the base name portion of the supplied path. */ |
| /* inBasename will be left pointing somewhere within the original path string. */ |
| inBasename = findBasename(path); |
| #ifdef UDATA_DEBUG |
| fprintf(stderr, "inBasename = %s\n", inBasename); |
| #endif |
| |
| if(*inBasename==0) { |
| /* no basename. This will happen if the original path was a directory name, */ |
| /* like "a/b/c/". (Fallback to separate files will still work.) */ |
| #ifdef UDATA_DEBUG |
| fprintf(stderr, "ocd: no basename in %s, bailing.\n", path); |
| #endif |
| *pErrorCode=U_FILE_ACCESS_ERROR; |
| return NULL; |
| } |
| |
| /* Is the requested common data file already open and cached? */ |
| /* Note that the cache is keyed by the base name only. The rest of the path, */ |
| /* if any, is not considered. */ |
| { |
| UDataMemory *dataToReturn = udata_findCachedData(inBasename); |
| if (dataToReturn != NULL) { |
| return dataToReturn; |
| } |
| } |
| |
| /* Requested item is not in the cache. |
| * Hunt it down, trying all the path locations |
| */ |
| |
| UDataPathIterator iter(u_getDataDirectory(), inBasename, path, ".dat", TRUE, pErrorCode); |
| |
| while((UDataMemory_isLoaded(&tData)==FALSE) && (pathBuffer = iter.next(pErrorCode)) != NULL) |
| { |
| #ifdef UDATA_DEBUG |
| fprintf(stderr, "ocd: trying path %s - ", pathBuffer); |
| #endif |
| uprv_mapFile(&tData, pathBuffer); |
| #ifdef UDATA_DEBUG |
| fprintf(stderr, "%s\n", UDataMemory_isLoaded(&tData)?"LOADED":"not loaded"); |
| #endif |
| } |
| |
| #if defined(OS390_STUBDATA) && defined(OS390BATCH) |
| if (!UDataMemory_isLoaded(&tData)) { |
| char ourPathBuffer[1024]; |
| /* One more chance, for extendCommonData() */ |
| uprv_strncpy(ourPathBuffer, path, 1019); |
| ourPathBuffer[1019]=0; |
| uprv_strcat(ourPathBuffer, ".dat"); |
| uprv_mapFile(&tData, ourPathBuffer); |
| } |
| #endif |
| |
| if (!UDataMemory_isLoaded(&tData)) { |
| /* no common data */ |
| *pErrorCode=U_FILE_ACCESS_ERROR; |
| return NULL; |
| } |
| |
| /* we have mapped a file, check its header */ |
| udata_checkCommonData(&tData, pErrorCode); |
| |
| |
| /* Cache the UDataMemory struct for this .dat file, |
| * so we won't need to hunt it down and map it again next time |
| * something is needed from it. */ |
| return udata_cacheDataItem(inBasename, &tData, pErrorCode); |
| } |
| |
| |
| /*----------------------------------------------------------------------* |
| * * |
| * extendICUData If the full set of ICU data was not loaded at * |
| * program startup, load it now. This function will * |
| * be called when the lookup of an ICU data item in * |
| * the common ICU data fails. * |
| * * |
| * return true if new data is loaded, false otherwise.* |
| * * |
| *----------------------------------------------------------------------*/ |
| static UBool extendICUData(UErrorCode *pErr) |
| { |
| UDataMemory *pData; |
| UDataMemory copyPData; |
| UBool didUpdate = FALSE; |
| |
| /* |
| * There is a chance for a race condition here. |
| * Normally, ICU data is loaded from a DLL or via mmap() and |
| * setCommonICUData() will detect if the same address is set twice. |
| * If ICU is built with data loading via fread() then the address will |
| * be different each time the common data is loaded and we may add |
| * multiple copies of the data. |
| * In this case, use a mutex to prevent the race. |
| * Use a specific mutex to avoid nested locks of the global mutex. |
| */ |
| #if MAP_IMPLEMENTATION==MAP_STDIO |
| static UMutex extendICUDataMutex = U_MUTEX_INITIALIZER; |
| umtx_lock(&extendICUDataMutex); |
| #endif |
| if(!gHaveTriedToLoadCommonData) { |
| /* See if we can explicitly open a .dat file for the ICUData. */ |
| pData = openCommonData( |
| U_ICUDATA_NAME, /* "icudt20l" , for example. */ |
| -1, /* Pretend we're not opening ICUData */ |
| pErr); |
| |
| /* How about if there is no pData, eh... */ |
| |
| UDataMemory_init(©PData); |
| if(pData != NULL) { |
| UDatamemory_assign(©PData, pData); |
| copyPData.map = 0; /* The mapping for this data is owned by the hash table */ |
| copyPData.mapAddr = 0; /* which will unmap it when ICU is shut down. */ |
| /* CommonICUData is also unmapped when ICU is shut down.*/ |
| /* To avoid unmapping the data twice, zero out the map */ |
| /* fields in the UDataMemory that we're assigning */ |
| /* to CommonICUData. */ |
| |
| didUpdate = /* no longer using this result */ |
| setCommonICUData(©PData,/* The new common data. */ |
| FALSE, /* No warnings if write didn't happen */ |
| pErr); /* setCommonICUData honors errors; NOP if error set */ |
| } |
| |
| gHaveTriedToLoadCommonData = TRUE; |
| } |
| |
| didUpdate = findCommonICUDataByName(U_ICUDATA_NAME); /* Return 'true' when a racing writes out the extended */ |
| /* data after another thread has failed to see it (in openCommonData), so */ |
| /* extended data can be examined. */ |
| /* Also handles a race through here before gHaveTriedToLoadCommonData is set. */ |
| |
| #if MAP_IMPLEMENTATION==MAP_STDIO |
| umtx_unlock(&extendICUDataMutex); |
| #endif |
| return didUpdate; /* Return true if ICUData pointer was updated. */ |
| /* (Could potentialy have been done by another thread racing */ |
| /* us through here, but that's fine, we still return true */ |
| /* so that current thread will also examine extended data. */ |
| } |
| |
| /*----------------------------------------------------------------------* |
| * * |
| * udata_setCommonData * |
| * * |
| *----------------------------------------------------------------------*/ |
| U_CAPI void U_EXPORT2 |
| udata_setCommonData(const void *data, UErrorCode *pErrorCode) { |
| UDataMemory dataMemory; |
| |
| if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) { |
| return; |
| } |
| |
| if(data==NULL) { |
| *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; |
| return; |
| } |
| |
| /* set the data pointer and test for validity */ |
| UDataMemory_init(&dataMemory); |
| UDataMemory_setData(&dataMemory, data); |
| udata_checkCommonData(&dataMemory, pErrorCode); |
| if (U_FAILURE(*pErrorCode)) {return;} |
| |
| /* we have good data */ |
| /* Set it up as the ICU Common Data. */ |
| setCommonICUData(&dataMemory, TRUE, pErrorCode); |
| } |
| |
| /*--------------------------------------------------------------------------- |
| * |
| * udata_setAppData |
| * |
| *---------------------------------------------------------------------------- */ |
| U_CAPI void U_EXPORT2 |
| udata_setAppData(const char *path, const void *data, UErrorCode *err) |
| { |
| UDataMemory udm; |
| |
| if(err==NULL || U_FAILURE(*err)) { |
| return; |
| } |
| if(data==NULL) { |
| *err=U_ILLEGAL_ARGUMENT_ERROR; |
| return; |
| } |
| |
| UDataMemory_init(&udm); |
| UDataMemory_setData(&udm, data); |
| udata_checkCommonData(&udm, err); |
| udata_cacheDataItem(path, &udm, err); |
| } |
| |
| /*----------------------------------------------------------------------------* |
| * * |
| * checkDataItem Given a freshly located/loaded data item, either * |
| * an entry in a common file or a separately loaded file, * |
| * sanity check its header, and see if the data is * |
| * acceptable to the app. * |
| * If the data is good, create and return a UDataMemory * |
| * object that can be returned to the application. * |
| * Return NULL on any sort of failure. * |
| * * |
| *----------------------------------------------------------------------------*/ |
| static UDataMemory * |
| checkDataItem |
| ( |
| const DataHeader *pHeader, /* The data item to be checked. */ |
| UDataMemoryIsAcceptable *isAcceptable, /* App's call-back function */ |
| void *context, /* pass-thru param for above. */ |
| const char *type, /* pass-thru param for above. */ |
| const char *name, /* pass-thru param for above. */ |
| UErrorCode *nonFatalErr, /* Error code if this data was not acceptable */ |
| /* but openChoice should continue with */ |
| /* trying to get data from fallback path. */ |
| UErrorCode *fatalErr /* Bad error, caller should return immediately */ |
| ) |
| { |
| UDataMemory *rDataMem = NULL; /* the new UDataMemory, to be returned. */ |
| |
| if (U_FAILURE(*fatalErr)) { |
| return NULL; |
| } |
| |
| if(pHeader->dataHeader.magic1==0xda && |
| pHeader->dataHeader.magic2==0x27 && |
| (isAcceptable==NULL || isAcceptable(context, type, name, &pHeader->info)) |
| ) { |
| rDataMem=UDataMemory_createNewInstance(fatalErr); |
| if (U_FAILURE(*fatalErr)) { |
| return NULL; |
| } |
| rDataMem->pHeader = pHeader; |
| } else { |
| /* the data is not acceptable, look further */ |
| /* If we eventually find something good, this errorcode will be */ |
| /* cleared out. */ |
| *nonFatalErr=U_INVALID_FORMAT_ERROR; |
| } |
| return rDataMem; |
| } |
| |
| /** |
| * @return 0 if not loaded, 1 if loaded or err |
| */ |
| static UDataMemory *doLoadFromIndividualFiles(const char *pkgName, |
| const char *dataPath, const char *tocEntryPathSuffix, |
| /* following arguments are the same as doOpenChoice itself */ |
| const char *path, const char *type, const char *name, |
| UDataMemoryIsAcceptable *isAcceptable, void *context, |
| UErrorCode *subErrorCode, |
| UErrorCode *pErrorCode) |
| { |
| const char *pathBuffer; |
| UDataMemory dataMemory; |
| UDataMemory *pEntryData; |
| |
| /* look in ind. files: package\nam.typ ========================= */ |
| /* init path iterator for individual files */ |
| UDataPathIterator iter(dataPath, pkgName, path, tocEntryPathSuffix, FALSE, pErrorCode); |
| |
| while((pathBuffer = iter.next(pErrorCode))) |
| { |
| #ifdef UDATA_DEBUG |
| fprintf(stderr, "UDATA: trying individual file %s\n", pathBuffer); |
| #endif |
| if(uprv_mapFile(&dataMemory, pathBuffer)) |
| { |
| pEntryData = checkDataItem(dataMemory.pHeader, isAcceptable, context, type, name, subErrorCode, pErrorCode); |
| if (pEntryData != NULL) { |
| /* Data is good. |
| * Hand off ownership of the backing memory to the user's UDataMemory. |
| * and return it. */ |
| pEntryData->mapAddr = dataMemory.mapAddr; |
| pEntryData->map = dataMemory.map; |
| |
| #ifdef UDATA_DEBUG |
| fprintf(stderr, "** Mapped file: %s\n", pathBuffer); |
| #endif |
| return pEntryData; |
| } |
| |
| /* the data is not acceptable, or some error occured. Either way, unmap the memory */ |
| udata_close(&dataMemory); |
| |
| /* If we had a nasty error, bail out completely. */ |
| if (U_FAILURE(*pErrorCode)) { |
| return NULL; |
| } |
| |
| /* Otherwise remember that we found data but didn't like it for some reason */ |
| *subErrorCode=U_INVALID_FORMAT_ERROR; |
| } |
| #ifdef UDATA_DEBUG |
| fprintf(stderr, "%s\n", UDataMemory_isLoaded(&dataMemory)?"LOADED":"not loaded"); |
| #endif |
| } |
| return NULL; |
| } |
| |
| /** |
| * @return 0 if not loaded, 1 if loaded or err |
| */ |
| static UDataMemory *doLoadFromCommonData(UBool isICUData, const char * /*pkgName*/, |
| const char * /*dataPath*/, const char * /*tocEntryPathSuffix*/, const char *tocEntryName, |
| /* following arguments are the same as doOpenChoice itself */ |
| const char *path, const char *type, const char *name, |
| UDataMemoryIsAcceptable *isAcceptable, void *context, |
| UErrorCode *subErrorCode, |
| UErrorCode *pErrorCode) |
| { |
| UDataMemory *pEntryData; |
| const DataHeader *pHeader; |
| UDataMemory *pCommonData; |
| int32_t commonDataIndex; |
| UBool checkedExtendedICUData = FALSE; |
| /* try to get common data. The loop is for platforms such as the 390 that do |
| * not initially load the full set of ICU data. If the lookup of an ICU data item |
| * fails, the full (but slower to load) set is loaded, the and the loop repeats, |
| * trying the lookup again. Once the full set of ICU data is loaded, the loop wont |
| * repeat because the full set will be checked the first time through. |
| * |
| * The loop also handles the fallback to a .dat file if the application linked |
| * to the stub data library rather than a real library. |
| */ |
| for (commonDataIndex = isICUData ? 0 : -1;;) { |
| pCommonData=openCommonData(path, commonDataIndex, subErrorCode); /** search for pkg **/ |
| |
| if(U_SUCCESS(*subErrorCode) && pCommonData!=NULL) { |
| int32_t length; |
| |
| /* look up the data piece in the common data */ |
| pHeader=pCommonData->vFuncs->Lookup(pCommonData, tocEntryName, &length, subErrorCode); |
| #ifdef UDATA_DEBUG |
| fprintf(stderr, "%s: pHeader=%p - %s\n", tocEntryName, pHeader, u_errorName(*subErrorCode)); |
| #endif |
| |
| if(pHeader!=NULL) { |
| pEntryData = checkDataItem(pHeader, isAcceptable, context, type, name, subErrorCode, pErrorCode); |
| #ifdef UDATA_DEBUG |
| fprintf(stderr, "pEntryData=%p\n", pEntryData); |
| #endif |
| if (U_FAILURE(*pErrorCode)) { |
| return NULL; |
| } |
| if (pEntryData != NULL) { |
| pEntryData->length = length; |
| return pEntryData; |
| } |
| } |
| } |
| /* Data wasn't found. If we were looking for an ICUData item and there is |
| * more data available, load it and try again, |
| * otherwise break out of this loop. */ |
| if (!isICUData) { |
| return NULL; |
| } else if (pCommonData != NULL) { |
| ++commonDataIndex; /* try the next data package */ |
| } else if ((!checkedExtendedICUData) && extendICUData(subErrorCode)) { |
| checkedExtendedICUData = TRUE; |
| /* try this data package slot again: it changed from NULL to non-NULL */ |
| } else { |
| return NULL; |
| } |
| } |
| } |
| |
| /* |
| * A note on the ownership of Mapped Memory |
| * |
| * For common format files, ownership resides with the UDataMemory object |
| * that lives in the cache of opened common data. These UDataMemorys are private |
| * to the udata implementation, and are never seen directly by users. |
| * |
| * The UDataMemory objects returned to users will have the address of some desired |
| * data within the mapped region, but they wont have the mapping info itself, and thus |
| * won't cause anything to be removed from memory when they are closed. |
| * |
| * For individual data files, the UDataMemory returned to the user holds the |
| * information necessary to unmap the data on close. If the user independently |
| * opens the same data file twice, two completely independent mappings will be made. |
| * (There is no cache of opened data items from individual files, only a cache of |
| * opened Common Data files, that is, files containing a collection of data items.) |
| * |
| * For common data passed in from the user via udata_setAppData() or |
| * udata_setCommonData(), ownership remains with the user. |
| * |
| * UDataMemory objects themselves, as opposed to the memory they describe, |
| * can be anywhere - heap, stack/local or global. |
| * They have a flag to indicate when they're heap allocated and thus |
| * must be deleted when closed. |
| */ |
| |
| |
| /*----------------------------------------------------------------------------* |
| * * |
| * main data loading functions * |
| * * |
| *----------------------------------------------------------------------------*/ |
| static UDataMemory * |
| doOpenChoice(const char *path, const char *type, const char *name, |
| UDataMemoryIsAcceptable *isAcceptable, void *context, |
| UErrorCode *pErrorCode) |
| { |
| UDataMemory *retVal = NULL; |
| |
| const char *dataPath; |
| |
| int32_t tocEntrySuffixIndex; |
| const char *tocEntryPathSuffix; |
| UErrorCode subErrorCode=U_ZERO_ERROR; |
| const char *treeChar; |
| |
| UBool isICUData = FALSE; |
| |
| |
| /* Is this path ICU data? */ |
| if(path == NULL || |
| !strcmp(path, U_ICUDATA_ALIAS) || /* "ICUDATA" */ |
| !uprv_strncmp(path, U_ICUDATA_NAME U_TREE_SEPARATOR_STRING, /* "icudt26e-" */ |
| uprv_strlen(U_ICUDATA_NAME U_TREE_SEPARATOR_STRING)) || |
| !uprv_strncmp(path, U_ICUDATA_ALIAS U_TREE_SEPARATOR_STRING, /* "ICUDATA-" */ |
| uprv_strlen(U_ICUDATA_ALIAS U_TREE_SEPARATOR_STRING))) { |
| isICUData = TRUE; |
| } |
| |
| #if (U_FILE_SEP_CHAR != U_FILE_ALT_SEP_CHAR) /* Windows: try "foo\bar" and "foo/bar" */ |
| /* remap from alternate path char to the main one */ |
| CharString altSepPath; |
| if(path) { |
| if(uprv_strchr(path,U_FILE_ALT_SEP_CHAR) != NULL) { |
| altSepPath.append(path, *pErrorCode); |
| char *p; |
| while((p=uprv_strchr(altSepPath.data(), U_FILE_ALT_SEP_CHAR))) { |
| *p = U_FILE_SEP_CHAR; |
| } |
| #if defined (UDATA_DEBUG) |
| fprintf(stderr, "Changed path from [%s] to [%s]\n", path, altSepPath.s); |
| #endif |
| path = altSepPath.data(); |
| } |
| } |
| #endif |
| |
| CharString tocEntryName; /* entry name in tree format. ex: 'icudt28b/coll/ar.res' */ |
| CharString tocEntryPath; /* entry name in path format. ex: 'icudt28b\\coll\\ar.res' */ |
| |
| CharString pkgName; |
| CharString treeName; |
| |
| /* ======= Set up strings */ |
| if(path==NULL) { |
| pkgName.append(U_ICUDATA_NAME, *pErrorCode); |
| } else { |
| const char *pkg; |
| const char *first; |
| pkg = uprv_strrchr(path, U_FILE_SEP_CHAR); |
| first = uprv_strchr(path, U_FILE_SEP_CHAR); |
| if(uprv_pathIsAbsolute(path) || (pkg != first)) { /* more than one slash in the path- not a tree name */ |
| /* see if this is an /absolute/path/to/package path */ |
| if(pkg) { |
| pkgName.append(pkg+1, *pErrorCode); |
| } else { |
| pkgName.append(path, *pErrorCode); |
| } |
| } else { |
| treeChar = uprv_strchr(path, U_TREE_SEPARATOR); |
| if(treeChar) { |
| treeName.append(treeChar+1, *pErrorCode); /* following '-' */ |
| if(isICUData) { |
| pkgName.append(U_ICUDATA_NAME, *pErrorCode); |
| } else { |
| pkgName.append(path, (int32_t)(treeChar-path), *pErrorCode); |
| if (first == NULL) { |
| /* |
| This user data has no path, but there is a tree name. |
| Look up the correct path from the data cache later. |
| */ |
| path = pkgName.data(); |
| } |
| } |
| } else { |
| if(isICUData) { |
| pkgName.append(U_ICUDATA_NAME, *pErrorCode); |
| } else { |
| pkgName.append(path, *pErrorCode); |
| } |
| } |
| } |
| } |
| |
| #ifdef UDATA_DEBUG |
| fprintf(stderr, " P=%s T=%s\n", pkgName.data(), treeName.data()); |
| #endif |
| |
| /* setting up the entry name and file name |
| * Make up a full name by appending the type to the supplied |
| * name, assuming that a type was supplied. |
| */ |
| |
| /* prepend the package */ |
| tocEntryName.append(pkgName, *pErrorCode); |
| tocEntryPath.append(pkgName, *pErrorCode); |
| tocEntrySuffixIndex = tocEntryName.length(); |
| |
| if(!treeName.isEmpty()) { |
| tocEntryName.append(U_TREE_ENTRY_SEP_CHAR, *pErrorCode).append(treeName, *pErrorCode); |
| tocEntryPath.append(U_FILE_SEP_CHAR, *pErrorCode).append(treeName, *pErrorCode); |
| } |
| |
| tocEntryName.append(U_TREE_ENTRY_SEP_CHAR, *pErrorCode).append(name, *pErrorCode); |
| tocEntryPath.append(U_FILE_SEP_CHAR, *pErrorCode).append(name, *pErrorCode); |
| if(type!=NULL && *type!=0) { |
| tocEntryName.append(".", *pErrorCode).append(type, *pErrorCode); |
| tocEntryPath.append(".", *pErrorCode).append(type, *pErrorCode); |
| } |
| tocEntryPathSuffix = tocEntryPath.data()+tocEntrySuffixIndex; /* suffix starts here */ |
| |
| #ifdef UDATA_DEBUG |
| fprintf(stderr, " tocEntryName = %s\n", tocEntryName.data()); |
| fprintf(stderr, " tocEntryPath = %s\n", tocEntryName.data()); |
| #endif |
| |
| if(path == NULL) { |
| path = COMMON_DATA_NAME; /* "icudt26e" */ |
| } |
| |
| /************************ Begin loop looking for ind. files ***************/ |
| #ifdef UDATA_DEBUG |
| fprintf(stderr, "IND: inBasename = %s, pkg=%s\n", "(n/a)", packageNameFromPath(path)); |
| #endif |
| |
| /* End of dealing with a null basename */ |
| dataPath = u_getDataDirectory(); |
| |
| /**** COMMON PACKAGE - only if packages are first. */ |
| if(gDataFileAccess == UDATA_PACKAGES_FIRST) { |
| #ifdef UDATA_DEBUG |
| fprintf(stderr, "Trying packages (UDATA_PACKAGES_FIRST)\n"); |
| #endif |
| /* #2 */ |
| retVal = doLoadFromCommonData(isICUData, |
| pkgName.data(), dataPath, tocEntryPathSuffix, tocEntryName.data(), |
| path, type, name, isAcceptable, context, &subErrorCode, pErrorCode); |
| if((retVal != NULL) || U_FAILURE(*pErrorCode)) { |
| return retVal; |
| } |
| } |
| |
| /**** INDIVIDUAL FILES */ |
| if((gDataFileAccess==UDATA_PACKAGES_FIRST) || |
| (gDataFileAccess==UDATA_FILES_FIRST)) { |
| #ifdef UDATA_DEBUG |
| fprintf(stderr, "Trying individual files\n"); |
| #endif |
| /* Check to make sure that there is a dataPath to iterate over */ |
| if ((dataPath && *dataPath) || !isICUData) { |
| retVal = doLoadFromIndividualFiles(pkgName.data(), dataPath, tocEntryPathSuffix, |
| path, type, name, isAcceptable, context, &subErrorCode, pErrorCode); |
| if((retVal != NULL) || U_FAILURE(*pErrorCode)) { |
| return retVal; |
| } |
| } |
| } |
| |
| /**** COMMON PACKAGE */ |
| if((gDataFileAccess==UDATA_ONLY_PACKAGES) || |
| (gDataFileAccess==UDATA_FILES_FIRST)) { |
| #ifdef UDATA_DEBUG |
| fprintf(stderr, "Trying packages (UDATA_ONLY_PACKAGES || UDATA_FILES_FIRST)\n"); |
| #endif |
| retVal = doLoadFromCommonData(isICUData, |
| pkgName.data(), dataPath, tocEntryPathSuffix, tocEntryName.data(), |
| path, type, name, isAcceptable, context, &subErrorCode, pErrorCode); |
| if((retVal != NULL) || U_FAILURE(*pErrorCode)) { |
| return retVal; |
| } |
| } |
| |
| /* Load from DLL. If we haven't attempted package load, we also haven't had any chance to |
| try a DLL (static or setCommonData/etc) load. |
| If we ever have a "UDATA_ONLY_FILES", add it to the or list here. */ |
| if(gDataFileAccess==UDATA_NO_FILES) { |
| #ifdef UDATA_DEBUG |
| fprintf(stderr, "Trying common data (UDATA_NO_FILES)\n"); |
| #endif |
| retVal = doLoadFromCommonData(isICUData, |
| pkgName.data(), "", tocEntryPathSuffix, tocEntryName.data(), |
| path, type, name, isAcceptable, context, &subErrorCode, pErrorCode); |
| if((retVal != NULL) || U_FAILURE(*pErrorCode)) { |
| return retVal; |
| } |
| } |
| |
| /* data not found */ |
| if(U_SUCCESS(*pErrorCode)) { |
| if(U_SUCCESS(subErrorCode)) { |
| /* file not found */ |
| *pErrorCode=U_FILE_ACCESS_ERROR; |
| } else { |
| /* entry point not found or rejected */ |
| *pErrorCode=subErrorCode; |
| } |
| } |
| return retVal; |
| } |
| |
| |
| |
| /* API ---------------------------------------------------------------------- */ |
| |
| U_CAPI UDataMemory * U_EXPORT2 |
| udata_open(const char *path, const char *type, const char *name, |
| UErrorCode *pErrorCode) { |
| #ifdef UDATA_DEBUG |
| fprintf(stderr, "udata_open(): Opening: %s : %s . %s\n", (path?path:"NULL"), name, type); |
| fflush(stderr); |
| #endif |
| |
| if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) { |
| return NULL; |
| } else if(name==NULL || *name==0) { |
| *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; |
| return NULL; |
| } else { |
| return doOpenChoice(path, type, name, NULL, NULL, pErrorCode); |
| } |
| } |
| |
| |
| |
| U_CAPI UDataMemory * U_EXPORT2 |
| udata_openChoice(const char *path, const char *type, const char *name, |
| UDataMemoryIsAcceptable *isAcceptable, void *context, |
| UErrorCode *pErrorCode) { |
| #ifdef UDATA_DEBUG |
| fprintf(stderr, "udata_openChoice(): Opening: %s : %s . %s\n", (path?path:"NULL"), name, type); |
| #endif |
| |
| if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) { |
| return NULL; |
| } else if(name==NULL || *name==0 || isAcceptable==NULL) { |
| *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; |
| return NULL; |
| } else { |
| return doOpenChoice(path, type, name, isAcceptable, context, pErrorCode); |
| } |
| } |
| |
| |
| |
| U_CAPI void U_EXPORT2 |
| udata_getInfo(UDataMemory *pData, UDataInfo *pInfo) { |
| if(pInfo!=NULL) { |
| if(pData!=NULL && pData->pHeader!=NULL) { |
| const UDataInfo *info=&pData->pHeader->info; |
| uint16_t dataInfoSize=udata_getInfoSize(info); |
| if(pInfo->size>dataInfoSize) { |
| pInfo->size=dataInfoSize; |
| } |
| uprv_memcpy((uint16_t *)pInfo+1, (const uint16_t *)info+1, pInfo->size-2); |
| if(info->isBigEndian!=U_IS_BIG_ENDIAN) { |
| /* opposite endianness */ |
| uint16_t x=info->reservedWord; |
| pInfo->reservedWord=(uint16_t)((x<<8)|(x>>8)); |
| } |
| } else { |
| pInfo->size=0; |
| } |
| } |
| } |
| |
| |
| U_CAPI void U_EXPORT2 udata_setFileAccess(UDataFileAccess access, UErrorCode * /*status*/) |
| { |
| gDataFileAccess = access; |
| } |
