The Tor Browser: intl/icu/source/common/udata.cpp@fc2d59ddac77 (annotated)

intl/icu/source/common/udata.cpp@fc2d59ddac77 (annotated)

intl/icu/source/common/udata.cpp

Wed, 31 Dec 2014 07:22:50 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 07:22:50 +0100
branch: TOR_BUG_3246
changeset 4: fc2d59ddac77
permissions: -rw-r--r--

Correct previous dual key logic pending first delivery installment.

 /*
 ******************************************************************************
 *
 *   Copyright (C) 1999-2013, 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 "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
 #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 icu::UInitOnce gCommonDataCacheInitOnce = U_INITONCE_INITIALIZER;
 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.                */
     }
     gCommonDataCacheInitOnce.reset();
     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);
     UDataMemory_setData(&tData, 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'          */
 }
 static void udata_initHashTable() {
     UErrorCode err = U_ZERO_ERROR;
     U_ASSERT(gCommonDataCache == NULL);
     gCommonDataCache = uhash_open(uhash_hashChars, uhash_compareChars, NULL, &err);
     if (U_FAILURE(err)) {
         // TODO: handle errors better.
         gCommonDataCache = NULL;
     }
     if (gCommonDataCache != NULL) {
         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() {
     umtx_initOnce(gCommonDataCacheInitOnce, &udata_initHashTable);
     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(&copyPData);
        if(pData != NULL) {
           UDatamemory_assign(&copyPData, 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(&copyPData,/*  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;
 }

The Tor Browser / annotate

intl/icu/source/common/udata.cpp@fc2d59ddac77 (annotated)

intl/icu/source/common/udata.cpp