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Diffstat (limited to 'intl/icu/source/common/udata.cpp')
| -rw-r--r-- | intl/icu/source/common/udata.cpp | 1460 |
1 files changed, 1460 insertions, 0 deletions
diff --git a/intl/icu/source/common/udata.cpp b/intl/icu/source/common/udata.cpp new file mode 100644 index 0000000000..76d970f3f2 --- /dev/null +++ b/intl/icu/source/common/udata.cpp @@ -0,0 +1,1460 @@ +// © 2016 and later: Unicode, Inc. and others. +// License & terms of use: http://www.unicode.org/copyright.html +/* +****************************************************************************** +* +* Copyright (C) 1999-2016, International Business Machines +* Corporation and others. All Rights Reserved. +* +****************************************************************************** +* file name: udata.cpp +* encoding: UTF-8 +* 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 "mutex.h" +#include "putilimp.h" +#include "restrace.h" +#include "uassert.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 + +U_NAMESPACE_USE + +/* + * Forward declarations + */ +static UDataMemory *udata_findCachedData(const char *path, UErrorCode &err); + +/*********************************************************************** +* +* 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] = { nullptr }; // Access protected by icu global mutex. + +static u_atomic_int32_t gHaveTriedToLoadCommonData {0}; // See extendICUData(). + +static UHashtable *gCommonDataCache = nullptr; /* Global hash table of opened ICU data files. */ +static icu::UInitOnce gCommonDataCacheInitOnce {}; + +#if !defined(ICU_DATA_DIR_WINDOWS) +static UDataFileAccess gDataFileAccess = UDATA_DEFAULT_ACCESS; // Access not synchronized. + // Modifying is documented as thread-unsafe. +#else +// If we are using the Windows data directory, then look in one spot only. +static UDataFileAccess gDataFileAccess = UDATA_NO_FILES; +#endif + +static UBool U_CALLCONV +udata_cleanup() +{ + int32_t i; + + if (gCommonDataCache) { /* Delete the cache of user data mappings. */ + uhash_close(gCommonDataCache); /* Table owns the contents, and will delete them. */ + gCommonDataCache = nullptr; /* Cleanup is not thread safe. */ + } + gCommonDataCacheInitOnce.reset(); + + for (i = 0; i < UPRV_LENGTHOF(gCommonICUDataArray) && gCommonICUDataArray[i] != nullptr; ++i) { + udata_close(gCommonICUDataArray[i]); + gCommonICUDataArray[i] = nullptr; + } + gHaveTriedToLoadCommonData = 0; + + return true; /* Everything was cleaned up */ +} + +static UBool U_CALLCONV +findCommonICUDataByName(const char *inBasename, UErrorCode &err) +{ + UBool found = false; + int32_t i; + + UDataMemory *pData = udata_findCachedData(inBasename, err); + if (U_FAILURE(err) || pData == nullptr) + return false; + + { + Mutex lock; + for (i = 0; i < UPRV_LENGTHOF(gCommonICUDataArray); ++i) { + if ((gCommonICUDataArray[i] != nullptr) && (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(nullptr); + for (i = 0; i < UPRV_LENGTHOF(gCommonICUDataArray); ++i) { + if (gCommonICUDataArray[i] == nullptr) { + gCommonICUDataArray[i] = newCommonData; + didUpdate = true; + break; + } else if (gCommonICUDataArray[i]->pHeader == pData->pHeader) { + /* The same data pointer is already in the array. */ + break; + } + } + umtx_unlock(nullptr); + + if (i == UPRV_LENGTHOF(gCommonICUDataArray) && warn) { + *pErr = U_USING_DEFAULT_WARNING; + } + if (didUpdate) { + ucln_common_registerCleanup(UCLN_COMMON_UDATA, udata_cleanup); + } else { + uprv_free(newCommonData); + } + return didUpdate; +} + +#if !defined(ICU_DATA_DIR_WINDOWS) + +static UBool +setCommonICUDataPointer(const void *pData, UBool /*warn*/, UErrorCode *pErrorCode) { + UDataMemory tData; + UDataMemory_init(&tData); + UDataMemory_setData(&tData, pData); + udata_checkCommonData(&tData, pErrorCode); + return setCommonICUData(&tData, false, pErrorCode); +} + +#endif + +static const char * +findBasename(const char *path) { + const char *basename=uprv_strrchr(path, U_FILE_SEP_CHAR); + if(basename==nullptr) { + return path; + } else { + return basename+1; + } +} + +#ifdef UDATA_DEBUG +static const char * +packageNameFromPath(const char *path) +{ + if((path == nullptr) || (*path == 0)) { + return U_ICUDATA_NAME; + } + + path = findBasename(path); + + if((path == nullptr) || (*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' */ +} + +static void U_CALLCONV udata_initHashTable(UErrorCode &err) { + U_ASSERT(gCommonDataCache == nullptr); + gCommonDataCache = uhash_open(uhash_hashChars, uhash_compareChars, nullptr, &err); + if (U_FAILURE(err)) { + return; + } + U_ASSERT(gCommonDataCache != nullptr); + uhash_setValueDeleter(gCommonDataCache, DataCacheElement_deleter); + ucln_common_registerCleanup(UCLN_COMMON_UDATA, udata_cleanup); +} + + /* 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) { + umtx_initOnce(gCommonDataCacheInitOnce, &udata_initHashTable, err); + return gCommonDataCache; +} + + + +static UDataMemory *udata_findCachedData(const char *path, UErrorCode &err) +{ + UHashtable *htable; + UDataMemory *retVal = nullptr; + DataCacheElement *el; + const char *baseName; + + htable = udata_getHashTable(err); + if (U_FAILURE(err)) { + return nullptr; + } + + baseName = findBasename(path); /* Cache remembers only the base name, not the full path. */ + umtx_lock(nullptr); + el = (DataCacheElement *)uhash_get(htable, baseName); + umtx_unlock(nullptr); + if (el != nullptr) { + retVal = el->item; + } +#ifdef UDATA_DEBUG + fprintf(stderr, "Cache: [%s] -> %p\n", baseName, (void*) 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 = nullptr; + UErrorCode subErr = U_ZERO_ERROR; + + htable = udata_getHashTable(*pErr); + if (U_FAILURE(*pErr)) { + return nullptr; + } + + /* 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 == nullptr) { + *pErr = U_MEMORY_ALLOCATION_ERROR; + return nullptr; + } + newElement->item = UDataMemory_createNewInstance(pErr); + if (U_FAILURE(*pErr)) { + uprv_free(newElement); + return nullptr; + } + UDatamemory_assign(newElement->item, item); + + baseName = findBasename(path); + nameLen = (int32_t)uprv_strlen(baseName); + newElement->name = (char *)uprv_malloc(nameLen+1); + if (newElement->name == nullptr) { + *pErr = U_MEMORY_ALLOCATION_ERROR; + uprv_free(newElement->item); + uprv_free(newElement); + return nullptr; + } + uprv_strcpy(newElement->name, baseName); + + /* Stick the new DataCacheElement into the hash table. + */ + umtx_lock(nullptr); + oldValue = (DataCacheElement *)uhash_get(htable, path); + if (oldValue != nullptr) { + subErr = U_USING_DEFAULT_WARNING; + } + else { + uhash_put( + htable, + newElement->name, /* Key */ + newElement, /* Value */ + &subErr); + } + umtx_unlock(nullptr); + +#ifdef UDATA_DEBUG + fprintf(stderr, "Cache: [%s] <<< %p : %s. vFunc=%p\n", newElement->name, + (void*) newElement->item, u_errorName(subErr), (void*) 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 : nullptr; + } + + return newElement->item; +} + +/*----------------------------------------------------------------------*============== + * * + * Path management. Could be shared with other tools/etc if need be * + * later on. * + * * + *----------------------------------------------------------------------*/ + +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)*/ + + StringPiece 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 inPath The full pathname to be iterated over. If nullptr, defaults to U_ICUDATA_NAME + * @param pkg Package which is being searched for, ex "icudt28l". Will ignore leaf directories such as /icudt28l + * @param item Item to be searched for. Can include full path, such as /a/b/foo.dat + * @param inSuffix 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. + * Note: inSuffix may also be the 'item' being searched for as well, (ex: "ibm-5348_P100-1997.cnv"), in which case + * the 'item' parameter is often the same as pkg. (Though sometimes might have a tree part as well, ex: "icudt62l-curr"). + */ +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 == nullptr) { + path = u_getDataDirectory(); + } else { + path = inPath; + } + + /** Package **/ + if(pkg != nullptr) { + 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, (void*) inSuffix); +#endif + + /** Suffix **/ + if(inSuffix != nullptr) { + suffix = inSuffix; + } else { + suffix = ""; + } + + checkLastFour = doCheckLastFour; + + /* pathBuffer will hold the output path strings returned by this iterator */ + +#ifdef UDATA_DEBUG + fprintf(stderr, "0: init %s -> [path=%s], [base=%s], [suff=%s], [itempath=%s], [nextpath=%s], [checklast4=%s]\n", + item, + path, + basename, + suffix.data(), + 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 nullptr if there are no more. + */ +const char *UDataPathIterator::next(UErrorCode *pErrorCode) +{ + if(U_FAILURE(*pErrorCode)) { + return nullptr; + } + + const char *currentPath = nullptr; + int32_t pathLen = 0; + const char *pathBasename; + + do + { + if( nextPath == nullptr ) { + 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 == nullptr) { + /* 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, " "); + { + int32_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 && + (pathLen>=4) && + uprv_strncmp(pathBuffer.data() +(pathLen-4), suffix.data(), 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.data(), 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.empty()) /* tack on suffix */ + { + if (suffix.length() > 4) { + // If the suffix is actually an item ("ibm-5348_P100-1997.cnv") and not an extension (".res") + // then we need to ensure that the path ends with a separator. + pathBuffer.ensureEndsWithFileSeparator(*pErrorCode); + } + 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 nullptr; +} + +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. * + * * + *----------------------------------------------------------------------*/ +#if !defined(ICU_DATA_DIR_WINDOWS) +// When using the Windows system data, we expect only a single data file. +extern "C" const DataHeader U_DATA_API U_ICUDATA_ENTRY_POINT; +#endif + +/* + * 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() ATTRIBUTE_WEAK; +extern const void *uprv_getICUData_conversion() 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 == nullptr */ + UErrorCode *pErrorCode) +{ + UDataMemory tData; + const char *pathBuffer; + const char *inBasename; + + if (U_FAILURE(*pErrorCode)) { + return nullptr; + } + + UDataMemory_init(&tData); + + /* ??????? TODO revisit this */ + if (commonDataIndex >= 0) { + /* "mini-cache" for common ICU data */ + if(commonDataIndex >= UPRV_LENGTHOF(gCommonICUDataArray)) { + return nullptr; + } + { + Mutex lock; + if(gCommonICUDataArray[commonDataIndex] != nullptr) { + return gCommonICUDataArray[commonDataIndex]; + } +#if !defined(ICU_DATA_DIR_WINDOWS) +// When using the Windows system data, we expect only a single data file. + 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 nullptr; + } + } +#endif + } + + /* 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); + } + */ +#if !defined(ICU_DATA_DIR_WINDOWS) +// When using the Windows system data, we expect only a single data file. + setCommonICUDataPointer(&U_ICUDATA_ENTRY_POINT, false, pErrorCode); + { + Mutex lock; + return gCommonICUDataArray[commonDataIndex]; + } +#endif + } + + + /* 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 + if (U_SUCCESS(*pErrorCode)) { + *pErrorCode=U_FILE_ACCESS_ERROR; + } + return nullptr; + } + + /* 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, *pErrorCode); + if (dataToReturn != nullptr || U_FAILURE(*pErrorCode)) { + 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)) != nullptr) + { +#ifdef UDATA_DEBUG + fprintf(stderr, "ocd: trying path %s - ", pathBuffer); +#endif + uprv_mapFile(&tData, pathBuffer, pErrorCode); +#ifdef UDATA_DEBUG + fprintf(stderr, "%s\n", UDataMemory_isLoaded(&tData)?"LOADED":"not loaded"); +#endif + } + if (U_FAILURE(*pErrorCode)) { + return nullptr; + } + +#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, pErrorCode); + } +#endif + + if (U_FAILURE(*pErrorCode)) { + return nullptr; + } + if (!UDataMemory_isLoaded(&tData)) { + /* no common data */ + *pErrorCode=U_FILE_ACCESS_ERROR; + return nullptr; + } + + /* 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; + umtx_lock(&extendICUDataMutex); +#endif + if(!umtx_loadAcquire(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 != nullptr) { + 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 */ + } + + umtx_storeRelease(gHaveTriedToLoadCommonData, 1); + } + + didUpdate = findCommonICUDataByName(U_ICUDATA_NAME, *pErr); /* 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 potentially 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==nullptr || U_FAILURE(*pErrorCode)) { + return; + } + + if(data==nullptr) { + *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==nullptr || U_FAILURE(*err)) { + return; + } + if(data==nullptr) { + *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 nullptr 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 = nullptr; /* the new UDataMemory, to be returned. */ + + if (U_FAILURE(*fatalErr)) { + return nullptr; + } + + if(pHeader->dataHeader.magic1==0xda && + pHeader->dataHeader.magic2==0x27 && + (isAcceptable==nullptr || isAcceptable(context, type, name, &pHeader->info)) + ) { + rDataMem=UDataMemory_createNewInstance(fatalErr); + if (U_FAILURE(*fatalErr)) { + return nullptr; + } + 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)) != nullptr) + { +#ifdef UDATA_DEBUG + fprintf(stderr, "UDATA: trying individual file %s\n", pathBuffer); +#endif + if (uprv_mapFile(&dataMemory, pathBuffer, pErrorCode)) + { + pEntryData = checkDataItem(dataMemory.pHeader, isAcceptable, context, type, name, subErrorCode, pErrorCode); + if (pEntryData != nullptr) { + /* 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 occurred. Either way, unmap the memory */ + udata_close(&dataMemory); + + /* If we had a nasty error, bail out completely. */ + if (U_FAILURE(*pErrorCode)) { + return nullptr; + } + + /* 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 nullptr; +} + +/** + * @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!=nullptr) { + 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, (void*) pHeader, u_errorName(*subErrorCode)); +#endif + + if(pHeader!=nullptr) { + pEntryData = checkDataItem(pHeader, isAcceptable, context, type, name, subErrorCode, pErrorCode); +#ifdef UDATA_DEBUG + fprintf(stderr, "pEntryData=%p\n", (void*) pEntryData); +#endif + if (U_FAILURE(*pErrorCode)) { + return nullptr; + } + if (pEntryData != nullptr) { + pEntryData->length = length; + return pEntryData; + } + } + } + // If we failed due to being out-of-memory, then stop early and report the error. + if (*subErrorCode == U_MEMORY_ALLOCATION_ERROR) { + *pErrorCode = *subErrorCode; + return nullptr; + } + /* 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 nullptr; + } else if (pCommonData != nullptr) { + ++commonDataIndex; /* try the next data package */ + } else if ((!checkedExtendedICUData) && extendICUData(subErrorCode)) { + checkedExtendedICUData = true; + /* try this data package slot again: it changed from nullptr to non-nullptr */ + } else { + return nullptr; + } + } +} + +/* + * Identify the Time Zone resources that are subject to special override data loading. + */ +static UBool isTimeZoneFile(const char *name, const char *type) { + return ((uprv_strcmp(type, "res") == 0) && + (uprv_strcmp(name, "zoneinfo64") == 0 || + uprv_strcmp(name, "timezoneTypes") == 0 || + uprv_strcmp(name, "windowsZones") == 0 || + uprv_strcmp(name, "metaZones") == 0)); +} + +/* + * 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 = nullptr; + + const char *dataPath; + + int32_t tocEntrySuffixIndex; + const char *tocEntryPathSuffix; + UErrorCode subErrorCode=U_ZERO_ERROR; + const char *treeChar; + + UBool isICUData = false; + + + FileTracer::traceOpen(path, type, name); + + + /* Is this path ICU data? */ + if(path == nullptr || + !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) != nullptr) { + altSepPath.append(path, *pErrorCode); + char *p; + while ((p = uprv_strchr(altSepPath.data(), U_FILE_ALT_SEP_CHAR)) != nullptr) { + *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==nullptr) { + 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 == nullptr) { + /* + 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!=nullptr && *type!=0) { + tocEntryName.append(".", *pErrorCode).append(type, *pErrorCode); + tocEntryPath.append(".", *pErrorCode).append(type, *pErrorCode); + } + // The +1 is for the U_FILE_SEP_CHAR that is always appended above. + tocEntryPathSuffix = tocEntryPath.data() + tocEntrySuffixIndex + 1; /* suffix starts here */ + +#ifdef UDATA_DEBUG + fprintf(stderr, " tocEntryName = %s\n", tocEntryName.data()); + fprintf(stderr, " tocEntryPath = %s\n", tocEntryName.data()); +#endif + +#if !defined(ICU_DATA_DIR_WINDOWS) + if(path == nullptr) { + path = COMMON_DATA_NAME; /* "icudt26e" */ + } +#else + // When using the Windows system data, we expects only a single data file. + path = COMMON_DATA_NAME; /* "icudt26e" */ +#endif + + /************************ 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(); + + /**** Time zone individual files override */ + if (isICUData && isTimeZoneFile(name, type)) { + const char *tzFilesDir = u_getTimeZoneFilesDirectory(pErrorCode); + if (tzFilesDir[0] != 0) { +#ifdef UDATA_DEBUG + fprintf(stderr, "Trying Time Zone Files directory = %s\n", tzFilesDir); +#endif + retVal = doLoadFromIndividualFiles(/* pkgName.data() */ "", tzFilesDir, tocEntryPathSuffix, + /* path */ "", type, name, isAcceptable, context, &subErrorCode, pErrorCode); + if((retVal != nullptr) || U_FAILURE(*pErrorCode)) { + return retVal; + } + } + } + + /**** 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 != nullptr) || 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 != nullptr) || 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 != nullptr) || 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 != nullptr) || 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:"nullptr"), name, type); + fflush(stderr); +#endif + + if(pErrorCode==nullptr || U_FAILURE(*pErrorCode)) { + return nullptr; + } else if(name==nullptr || *name==0) { + *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; + return nullptr; + } else { + return doOpenChoice(path, type, name, nullptr, nullptr, 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:"nullptr"), name, type); +#endif + + if(pErrorCode==nullptr || U_FAILURE(*pErrorCode)) { + return nullptr; + } else if(name==nullptr || *name==0 || isAcceptable==nullptr) { + *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; + return nullptr; + } else { + return doOpenChoice(path, type, name, isAcceptable, context, pErrorCode); + } +} + + + +U_CAPI void U_EXPORT2 +udata_getInfo(UDataMemory *pData, UDataInfo *pInfo) { + if(pInfo!=nullptr) { + if(pData!=nullptr && pData->pHeader!=nullptr) { + 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*/) +{ + // Note: this function is documented as not thread safe. + gDataFileAccess = access; +} |