890 lines
32 KiB
C
890 lines
32 KiB
C
/*
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******************************************************************************
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*
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* Copyright (C) 1999-2001, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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******************************************************************************
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* file name: udata.c
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* encoding: US-ASCII
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* tab size: 8 (not used)
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* indentation:4
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*
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* created on: 1999oct25
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* created by: Markus W. Scherer
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*/
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#include "unicode/utypes.h"
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#include "unicode/putil.h"
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#include "umutex.h"
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#include "cmemory.h"
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#include "cstring.h"
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#include "unicode/udata.h"
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#include "unicode/uversion.h"
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#include "uhash.h"
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#include "ucln_cmn.h"
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#include "udatamem.h"
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#include "umapfile.h"
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#include "ucmndata.h"
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/***********************************************************************
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*
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* Notes on the organization of the ICU data implementation
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*
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* All of the public API is defined in udata.h
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*
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* The implementation is split into several files...
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*
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* - udata.c (this file) contains higher level code that knows about
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* the search paths for locating data, caching opened data, etc.
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*
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* - umapfile.c contains the low level platform-specific code for actually loading
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* (memory mapping, file reading, whatever) data into memory.
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*
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* - ucmndata.c deals with the tables of contents of ICU data items within
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* an ICU common format data file. The implementation includes
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* an abstract interface and support for multiple TOC formats.
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* All knowledge of any specific TOC format is encapsulated here.
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*
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* - udatamem.c has code for managing UDataMemory structs. These are little
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* descriptor objects for blocks of memory holding ICU data of
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* various types.
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*/
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/* configuration ---------------------------------------------------------- */
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/* If you are excruciatingly bored turn this on .. */
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/* #define UDATA_DEBUG 1 */
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#if defined(UDATA_DEBUG)
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# include <stdio.h>
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#endif
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/***********************************************************************
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*
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* static (Global) data
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*
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************************************************************************/
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static UDataMemory *gCommonICUData = NULL; /* Pointer to the common ICU data. */
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/* May be updated once, if we started with */
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/* a stub or subset library. */
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static UDataMemory *gStubICUData = NULL; /* If gCommonICUData does get updated, remember */
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/* the original one so that it can be cleaned */
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/* up when ICU is shut down. */
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static UHashtable *gCommonDataCache = NULL; /* Global hash table of opened ICU data files. */
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UBool
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udata_cleanup()
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{
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if (gCommonDataCache) { /* Delete the cache of user data mappings. */
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uhash_close(gCommonDataCache); /* Table owns the contents, and will delete them. */
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gCommonDataCache = NULL; /* Cleanup is not thread safe. */
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}
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if (gCommonICUData != NULL) {
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udata_close(gCommonICUData); /* Clean up common ICU Data */
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gCommonICUData = NULL;
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}
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if (gStubICUData != NULL) {
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udata_close(gStubICUData); /* Clean up the stub ICU Data */
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gStubICUData = NULL;
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}
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return TRUE; /* Everything was cleaned up */
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}
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/*
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* setCommonICUData. Set a UDataMemory to be the global ICU Data
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*/
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static void
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setCommonICUData(UDataMemory *pData, /* The new common data. Belongs to caller, we copy it. */
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UDataMemory *oldData, /* Old ICUData ptr. Overwrite of this value is ok, */
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/* of any others is not. */
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UBool warn, /* If true, set USING_DEFAULT warning if ICUData was */
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/* changed by another thread before we got to it. */
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UErrorCode *pErr)
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{
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UDataMemory *newCommonData = UDataMemory_createNewInstance(pErr);
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if (U_FAILURE(*pErr)) {
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return;
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}
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/* For the assignment, other threads must cleanly see either the old */
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/* or the new, not some partially initialized new. The old can not be */
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/* deleted - someone may still have a pointer to it lying around in */
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/* their locals. */
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UDatamemory_assign(newCommonData, pData);
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umtx_lock(NULL);
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if (gCommonICUData==oldData) {
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gStubICUData = gCommonICUData; /* remember the old Common Data, so it can be cleaned up. */
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gCommonICUData = newCommonData;
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}
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else {
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if (warn==TRUE) {
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*pErr = U_USING_DEFAULT_WARNING;
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}
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uprv_free(newCommonData);
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}
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umtx_unlock(NULL);
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return;
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}
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static char *
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strcpy_returnEnd(char *dest, const char *src) {
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while((*dest=*src)!=0) {
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++dest;
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++src;
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}
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return dest;
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}
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/*------------------------------------------------------------------------------
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*
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* computeDirPath given a user-supplied path of an item to be opened,
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* compute and return
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* - the full directory path to be used
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* when opening the file.
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* - Pointer to null at end of above returned path
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*
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* Parameters:
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* path: input path. Buffer is not altered.
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* pathBuffer: Output buffer. Any contents are overwritten.
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*
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* Returns:
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* Pointer to null termination in returned pathBuffer.
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*
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* TODO: This works the way ICU historically has, but the
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* whole data fallback search path is so complicated that
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* proabably almost no one will ever really understand it,
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* the potential for confusion is large. (It's not just
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* this one function, but the whole scheme.)
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*
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*------------------------------------------------------------------------------*/
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char *
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uprv_computeDirPath(const char *path, char *pathBuffer) {
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char *finalSlash; /* Ptr to last dir separator in input path, or null if none. */
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int pathLen; /* Length of the returned directory path */
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finalSlash = 0;
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if (path != 0) {
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finalSlash = uprv_strrchr(path, U_FILE_SEP_CHAR);
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}
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*pathBuffer = 0;
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if (finalSlash == 0) {
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/* No user-supplied path.
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* Copy the ICU_DATA path to the path buffer and return that*/
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const char *icuDataDir;
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icuDataDir=u_getDataDirectory();
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if(icuDataDir!=NULL && *icuDataDir!=0) {
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return strcpy_returnEnd(pathBuffer, icuDataDir);
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} else {
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/* there is no icuDataDir either. Just return the empty pathBuffer. */
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return pathBuffer;
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}
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}
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/* User supplied path did contain a directory portion.
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* Copy it to the output path buffer */
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pathLen = finalSlash - path + 1;
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uprv_memcpy(pathBuffer, path, pathLen);
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*(pathBuffer+pathLen) = 0;
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return pathBuffer+pathLen;
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}
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static const char *
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findBasename(const char *path) {
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const char *basename=uprv_strrchr(path, U_FILE_SEP_CHAR);
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if(basename==NULL) {
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return path;
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} else {
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return basename+1;
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}
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}
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/*----------------------------------------------------------------------*
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* *
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* Cache for common data *
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* Functions for looking up or adding entries to a cache of *
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* data that has been previously opened. Avoids a potentially *
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* expensive operation of re-opening the data for subsequent *
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* uses. *
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* *
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* Data remains cached for the duration of the process. *
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* *
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*----------------------------------------------------------------------*/
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typedef struct DataCacheElement {
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char *name;
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UDataMemory *item;
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} DataCacheElement;
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/*
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* Deleter function for DataCacheElements.
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* udata cleanup function closes the hash table; hash table in turn calls back to
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* here for each entry.
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*/
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static void U_EXPORT2 U_CALLCONV DataCacheElement_deleter(void *pDCEl) {
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DataCacheElement *p = (DataCacheElement *)pDCEl;
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udata_close(p->item); /* unmaps storage */
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uprv_free(p->name); /* delete the hash key string. */
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uprv_free(pDCEl); /* delete 'this' */
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}
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/* udata_getCacheHashTable()
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* Get the hash table used to store the data cache entries.
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* Lazy create it if it doesn't yet exist.
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*/
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static UHashtable *udata_getHashTable() {
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UErrorCode err = U_ZERO_ERROR;
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if (gCommonDataCache != NULL) {
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return gCommonDataCache;
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}
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umtx_lock(NULL);
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if (gCommonDataCache == NULL) {
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gCommonDataCache = uhash_open(uhash_hashChars, uhash_compareChars, &err);
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uhash_setValueDeleter(gCommonDataCache, DataCacheElement_deleter);
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}
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umtx_unlock(NULL);
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if (U_FAILURE(err)) {
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return NULL; /* TODO: handle this error better. */
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}
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return gCommonDataCache;
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}
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static UDataMemory *udata_findCachedData(const char *path)
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{
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UHashtable *htable;
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UDataMemory *retVal = NULL;
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DataCacheElement *el;
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const char *baseName;
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baseName = findBasename(path); /* Cache remembers only the base name, not the full path. */
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htable = udata_getHashTable();
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umtx_lock(NULL);
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el = (DataCacheElement *)uhash_get(htable, baseName);
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umtx_unlock(NULL);
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if (el != NULL) {
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retVal = el->item;
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}
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return retVal;
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}
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static UDataMemory *udata_cacheDataItem(const char *path, UDataMemory *item, UErrorCode *pErr) {
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DataCacheElement *newElement;
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const char *baseName;
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int nameLen;
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UHashtable *htable;
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UDataMemory *oldValue = NULL;
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if (U_FAILURE(*pErr)) {
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return NULL;
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}
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/* Create a new DataCacheElement - the thingy we store in the hash table -
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* and copy the supplied path and UDataMemoryItems into it.
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*/
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newElement = uprv_malloc(sizeof(DataCacheElement));
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if (newElement == NULL) {
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*pErr = U_MEMORY_ALLOCATION_ERROR;
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return NULL;
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}
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newElement->item = UDataMemory_createNewInstance(pErr);
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if (U_FAILURE(*pErr)) {
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return NULL;
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}
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UDatamemory_assign(newElement->item, item);
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baseName = findBasename(path);
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nameLen = uprv_strlen(baseName);
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newElement->name = uprv_malloc(nameLen+1);
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if (newElement->name == NULL) {
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*pErr = U_MEMORY_ALLOCATION_ERROR;
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return NULL;
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}
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uprv_strcpy(newElement->name, baseName);
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/* Stick the new DataCacheElement into the hash table.
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*/
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htable = udata_getHashTable();
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umtx_lock(NULL);
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oldValue = uhash_get(htable, path);
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if (oldValue != NULL) {
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*pErr = U_USING_DEFAULT_WARNING; }
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else {
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uhash_put(
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htable,
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newElement->name, /* Key */
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newElement, /* Value */
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pErr);
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}
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umtx_unlock(NULL);
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if (*pErr == U_USING_DEFAULT_WARNING || U_FAILURE(*pErr)) {
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/* TODO - get rid of newElement->item too. */
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uprv_free(newElement->name);
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uprv_free(newElement);
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return oldValue;
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}
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return newElement->item;
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}
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/*----------------------------------------------------------------------*
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* *
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* Add a static reference to the common data library *
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* Unless overridden by an explicit u_setCommonData, this will be *
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* our common data. *
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* *
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*----------------------------------------------------------------------*/
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extern const DataHeader U_IMPORT U_ICUDATA_ENTRY_POINT;
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/*----------------------------------------------------------------------*
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* *
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* openCommonData Attempt to open a common format (.dat) file *
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* Map it into memory (if it's not there already) *
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* and return a UDataMemory object for it. *
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* *
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* If the requested data is already open and cached *
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* just return the cached UDataMem object. *
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* *
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*----------------------------------------------------------------------*/
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static UDataMemory *
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openCommonData(
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const char *path, /* Path from OpenCHoice? */
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UBool isICUData, /* ICU Data true if path == NULL */
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UErrorCode *pErrorCode)
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{
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const char *inBasename;
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char *basename, *suffix;
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char pathBuffer[1024];
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UDataMemory tData;
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if (U_FAILURE(*pErrorCode)) {
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return NULL;
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}
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UDataMemory_init(&tData);
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if (isICUData) {
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/* "mini-cache" for common ICU data */
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if(gCommonICUData != NULL) {
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return gCommonICUData;
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}
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tData.pHeader = &U_ICUDATA_ENTRY_POINT;
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udata_checkCommonData(&tData, pErrorCode);
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setCommonICUData(&tData, NULL, FALSE, pErrorCode);
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return gCommonICUData;
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}
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/* request is NOT for ICU Data. */
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/* Find the base name portion of the supplied path. */
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/* inBasename will be left pointing somewhere within the original path string. */
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inBasename=findBasename(path);
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if(*inBasename==0) {
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/* no basename. This will happen if the original path was a directory name, */
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/* like "a/b/c/". (Fallback to separate files will still work.) */
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*pErrorCode=U_FILE_ACCESS_ERROR;
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return NULL;
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}
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/* Is the requested common data file already open and cached? */
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/* Note that the cache is keyed by the base name only. The rest of the path, */
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/* if any, is not considered. */
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{
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UDataMemory *dataToReturn = udata_findCachedData(inBasename);
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if (dataToReturn != NULL) {
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return dataToReturn;
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}
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}
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/* Requested item is not in the cache.
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* Hunt it down, trying all the fall back locations.
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*/
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/* try path/basename first, then basename only */
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basename=uprv_computeDirPath(path, pathBuffer); /* pathBuffer = directory path */
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suffix=strcpy_returnEnd(basename, inBasename); /* append the base name. */
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uprv_strcpy(suffix, ".dat"); /* append ".dat" */
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uprv_mapFile(&tData, pathBuffer);
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if (!UDataMemory_isLoaded(&tData)) {
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/* The data didn't open. Try again without the directory portion of the name */
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if (basename!=pathBuffer) {
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uprv_mapFile(&tData, basename);
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}
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}
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if (!UDataMemory_isLoaded(&tData)) {
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/* no common data */
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*pErrorCode=U_FILE_ACCESS_ERROR;
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return NULL;
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}
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/* we have mapped a file, check its header */
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udata_checkCommonData(&tData, pErrorCode);
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/* Cache the UDataMemory struct for this .dat file,
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* so we won't need to hunt it down and map it again next time
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* something is needed from it. */
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return udata_cacheDataItem(inBasename, &tData, pErrorCode);
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}
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#ifdef OS390
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# define MAX_STUB_ENTRIES 7
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#else
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# define MAX_STUB_ENTRIES 0
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#endif
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/*----------------------------------------------------------------------*
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* *
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* extendICUData If the full set of ICU data was not loaded at *
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* program startup, load it now. This function will *
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* be called when the lookup of an ICU data item in *
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* the common ICU data fails. *
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* *
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* The parameter is the UDataMemory in which the *
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* search for a requested item failed. *
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* *
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* return true if new data is loaded, false otherwise.*
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* *
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*----------------------------------------------------------------------*/
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static UBool extendICUData(UDataMemory *failedData, UErrorCode *pErr)
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{
|
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/* If the data library that we are running with turns out to be the
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* stub library (or, on the 390, the subset library), we will try to
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* load a .dat file instead. The stub library has no entries in its
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* TOC, which is how we identify it here.
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*/
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UDataMemory *pData;
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UDataMemory copyPData;
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if (failedData->vFuncs->NumEntries(failedData) > MAX_STUB_ENTRIES) {
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/* Not the stub. We can't extend. */
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return FALSE;
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}
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|
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/* See if we can explicitly open a .dat file for the ICUData. */
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pData = openCommonData(
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U_ICUDATA_NAME, /* "icudt20l" , for example. */
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FALSE, /* Pretend we're not opening ICUData */
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pErr);
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/* How about if there is no pData, eh... */
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|
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UDataMemory_init(©PData);
|
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if(pData != NULL) {
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UDatamemory_assign(©PData, pData);
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copyPData.map = 0; /* The mapping for this data is owned by the hash table */
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copyPData.mapAddr = 0; /* which will unmap it when ICU is shut down. */
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/* CommonICUData is also unmapped when ICU is shut down.*/
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/* To avoid unmapping the data twice, zero out the map */
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/* fields in the UDataMemory that we're assigning */
|
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/* to CommonICUData. */
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setCommonICUData(©PData, /* The new common data. */
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failedData, /* Old ICUData ptr. Overwrite of this value is ok, */
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FALSE, /* No warnings if write didn't happen */
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pErr); /* setCommonICUData honors errors; NOP if error set */
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}
|
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|
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return gCommonICUData != failedData; /* 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. */
|
|
}
|
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|
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|
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/*----------------------------------------------------------------------*
|
|
* *
|
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* udata_setCommonData *
|
|
* *
|
|
*----------------------------------------------------------------------*/
|
|
U_CAPI void U_EXPORT2
|
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udata_setCommonData(const void *data, UErrorCode *pErrorCode) {
|
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UDataMemory dataMemory;
|
|
|
|
if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
|
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return;
|
|
}
|
|
|
|
if(data==NULL) {
|
|
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
|
|
return;
|
|
}
|
|
|
|
/* do we already have common ICU data set? */
|
|
if(gCommonICUData != NULL) {
|
|
*pErrorCode=U_USING_DEFAULT_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, NULL, 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);
|
|
udm.pHeader = 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 &&
|
|
pHeader->info.isBigEndian==U_IS_BIG_ENDIAN &&
|
|
(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;
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
char pathBuffer[1024];
|
|
char tocEntryName[100];
|
|
UDataMemory dataMemory;
|
|
UDataMemory *pCommonData;
|
|
UDataMemory *pEntryData;
|
|
const DataHeader *pHeader;
|
|
const char *inBasename;
|
|
char *basename;
|
|
char *suffix;
|
|
UErrorCode errorCode=U_ZERO_ERROR;
|
|
UBool isICUData= (UBool)(path==NULL);
|
|
|
|
|
|
/* Make up a full mame by appending the type to the supplied
|
|
* name, assuming that a type was supplied.
|
|
*/
|
|
uprv_strcpy(tocEntryName, name);
|
|
if(type!=NULL && *type!=0) {
|
|
uprv_strcat(tocEntryName, ".");
|
|
uprv_strcat(tocEntryName, type);
|
|
}
|
|
|
|
/* 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 (;;) {
|
|
pCommonData=openCommonData(path, isICUData, &errorCode);
|
|
|
|
if(U_SUCCESS(errorCode)) {
|
|
/* look up the data piece in the common data */
|
|
pHeader=pCommonData->vFuncs->Lookup(pCommonData, tocEntryName, &errorCode);
|
|
if(pHeader!=NULL) {
|
|
pEntryData = checkDataItem(pHeader, isAcceptable, context, type, name, &errorCode, pErrorCode);
|
|
if (U_FAILURE(*pErrorCode)) {
|
|
return NULL;
|
|
}
|
|
if (pEntryData != NULL) {
|
|
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 && extendICUData(pCommonData, &errorCode))) {
|
|
break;
|
|
}
|
|
};
|
|
|
|
|
|
/* the data was not found in the common data, look further, */
|
|
/* try to get an individual data file */
|
|
basename=uprv_computeDirPath(path, pathBuffer);
|
|
if(isICUData) {
|
|
inBasename=COMMON_DATA_NAME;
|
|
} else {
|
|
inBasename=findBasename(path);
|
|
}
|
|
|
|
#ifdef UDATA_DEBUG
|
|
fprintf(stderr, "looking for ind. file\n");
|
|
#endif
|
|
|
|
/* try path+basename+"_"+entryName first */
|
|
if(*inBasename!=0) {
|
|
suffix=strcpy_returnEnd(basename, inBasename);
|
|
*suffix++='_';
|
|
uprv_strcpy(suffix, tocEntryName);
|
|
|
|
if( uprv_mapFile(&dataMemory, pathBuffer) ||
|
|
(basename!=pathBuffer && uprv_mapFile(&dataMemory, basename)))
|
|
{
|
|
/* We mapped a file. Check out its contents. */
|
|
pEntryData = checkDataItem(dataMemory.pHeader, isAcceptable, context, type, name, &errorCode, pErrorCode);
|
|
if (pEntryData != NULL)
|
|
{
|
|
/* Got good data.
|
|
* Hand off ownership of the backing memory to the user's UDataMemory.
|
|
* and return it. */
|
|
pEntryData->mapAddr = dataMemory.mapAddr;
|
|
pEntryData->map = dataMemory.map;
|
|
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,
|
|
* and continue looking
|
|
*/
|
|
errorCode=U_INVALID_FORMAT_ERROR;
|
|
}
|
|
}
|
|
|
|
/* try path+entryName next */
|
|
uprv_strcpy(basename, tocEntryName);
|
|
if( uprv_mapFile(&dataMemory, pathBuffer) ||
|
|
(basename!=pathBuffer && uprv_mapFile(&dataMemory, basename)))
|
|
{
|
|
pEntryData = checkDataItem(dataMemory.pHeader, isAcceptable, context, type, name, &errorCode, 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;
|
|
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 */
|
|
errorCode=U_INVALID_FORMAT_ERROR;
|
|
}
|
|
|
|
/* data not found */
|
|
if(U_SUCCESS(*pErrorCode)) {
|
|
if(U_SUCCESS(errorCode)) {
|
|
/* file not found */
|
|
*pErrorCode=U_FILE_ACCESS_ERROR;
|
|
} else {
|
|
/* entry point not found or rejected */
|
|
*pErrorCode=errorCode;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
|
|
|
|
/* 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\n", 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\n", name, type);fflush(stderr);
|
|
#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;
|
|
if(pInfo->size>info->size) {
|
|
pInfo->size=info->size;
|
|
}
|
|
uprv_memcpy((uint16_t *)pInfo+1, (uint16_t *)info+1, pInfo->size-2);
|
|
} else {
|
|
pInfo->size=0;
|
|
}
|
|
}
|
|
}
|