/* ******************************************************************************* * * Copyright (C) 2003-2009, International Business Machines * Corporation and others. All Rights Reserved. * ******************************************************************************* * file name: usprep.cpp * encoding: US-ASCII * tab size: 8 (not used) * indentation:4 * * created on: 2003jul2 * created by: Ram Viswanadha */ #include "unicode/utypes.h" #if !UCONFIG_NO_IDNA #include "unicode/usprep.h" #include "unicode/unorm.h" #include "unicode/ustring.h" #include "unicode/uchar.h" #include "unicode/uversion.h" #include "umutex.h" #include "cmemory.h" #include "sprpimpl.h" #include "ustr_imp.h" #include "uhash.h" #include "cstring.h" #include "udataswp.h" #include "ucln_cmn.h" #include "unormimp.h" #include "ubidi_props.h" U_CDECL_BEGIN /* Static cache for already opened StringPrep profiles */ static UHashtable *SHARED_DATA_HASHTABLE = NULL; static UMTX usprepMutex = NULL; /* format version of spp file */ static uint8_t formatVersion[4]={ 0, 0, 0, 0 }; /* the Unicode version of the sprep data */ static UVersionInfo dataVersion={ 0, 0, 0, 0 }; /* Profile names must be aligned to UStringPrepProfileType */ static const char *PROFILE_NAMES[] = { "rfc3491", /* USPREP_RFC3491_NAMEPREP */ "rfc3530cs", /* USPREP_RFC3530_NFS4_CS_PREP */ "rfc3530csci", /* USPREP_RFC3530_NFS4_CS_PREP_CI */ "rfc3491", /* USPREP_RFC3530_NSF4_CIS_PREP */ "rfc3530mixp", /* USPREP_RFC3530_NSF4_MIXED_PREP_PREFIX */ "rfc3491", /* USPREP_RFC3530_NSF4_MIXED_PREP_SUFFIX */ "rfc3722", /* USPREP_RFC3722_ISCSI */ "rfc3920node", /* USPREP_RFC3920_NODEPREP */ "rfc3920res", /* USPREP_RFC3920_RESOURCEPREP */ "rfc4011", /* USPREP_RFC4011_MIB */ "rfc4013", /* USPREP_RFC4013_SASLPREP */ "rfc4505", /* USPREP_RFC4505_TRACE */ "rfc4518", /* USPREP_RFC4518_LDAP */ "rfc4518ci", /* USPREP_RFC4518_LDAP_CI */ }; static UBool U_CALLCONV isSPrepAcceptable(void * /* context */, const char * /* type */, const char * /* name */, const UDataInfo *pInfo) { if( pInfo->size>=20 && pInfo->isBigEndian==U_IS_BIG_ENDIAN && pInfo->charsetFamily==U_CHARSET_FAMILY && pInfo->dataFormat[0]==0x53 && /* dataFormat="SPRP" */ pInfo->dataFormat[1]==0x50 && pInfo->dataFormat[2]==0x52 && pInfo->dataFormat[3]==0x50 && pInfo->formatVersion[0]==3 && pInfo->formatVersion[2]==UTRIE_SHIFT && pInfo->formatVersion[3]==UTRIE_INDEX_SHIFT ) { uprv_memcpy(formatVersion, pInfo->formatVersion, 4); uprv_memcpy(dataVersion, pInfo->dataVersion, 4); return TRUE; } else { return FALSE; } } static int32_t U_CALLCONV getSPrepFoldingOffset(uint32_t data) { return (int32_t)data; } /* hashes an entry */ static int32_t U_CALLCONV hashEntry(const UHashTok parm) { UStringPrepKey *b = (UStringPrepKey *)parm.pointer; UHashTok namekey, pathkey; namekey.pointer = b->name; pathkey.pointer = b->path; return uhash_hashChars(namekey)+37*uhash_hashChars(pathkey); } /* compares two entries */ static UBool U_CALLCONV compareEntries(const UHashTok p1, const UHashTok p2) { UStringPrepKey *b1 = (UStringPrepKey *)p1.pointer; UStringPrepKey *b2 = (UStringPrepKey *)p2.pointer; UHashTok name1, name2, path1, path2; name1.pointer = b1->name; name2.pointer = b2->name; path1.pointer = b1->path; path2.pointer = b2->path; return ((UBool)(uhash_compareChars(name1, name2) & uhash_compareChars(path1, path2))); } static void usprep_unload(UStringPrepProfile* data){ udata_close(data->sprepData); } static int32_t usprep_internal_flushCache(UBool noRefCount){ UStringPrepProfile *profile = NULL; UStringPrepKey *key = NULL; int32_t pos = -1; int32_t deletedNum = 0; const UHashElement *e; /* * if shared data hasn't even been lazy evaluated yet * return 0 */ umtx_lock(&usprepMutex); if (SHARED_DATA_HASHTABLE == NULL) { umtx_unlock(&usprepMutex); return 0; } /*creates an enumeration to iterate through every element in the table */ while ((e = uhash_nextElement(SHARED_DATA_HASHTABLE, &pos)) != NULL) { profile = (UStringPrepProfile *) e->value.pointer; key = (UStringPrepKey *) e->key.pointer; if ((noRefCount== FALSE && profile->refCount == 0) || noRefCount== TRUE) { deletedNum++; uhash_removeElement(SHARED_DATA_HASHTABLE, e); /* unload the data */ usprep_unload(profile); if(key->name != NULL) { uprv_free(key->name); key->name=NULL; } if(key->path != NULL) { uprv_free(key->path); key->path=NULL; } uprv_free(profile); uprv_free(key); } } umtx_unlock(&usprepMutex); return deletedNum; } /* Works just like ucnv_flushCache() static int32_t usprep_flushCache(){ return usprep_internal_flushCache(FALSE); } */ static UBool U_CALLCONV usprep_cleanup(void){ if (SHARED_DATA_HASHTABLE != NULL) { usprep_internal_flushCache(TRUE); if (SHARED_DATA_HASHTABLE != NULL && uhash_count(SHARED_DATA_HASHTABLE) == 0) { uhash_close(SHARED_DATA_HASHTABLE); SHARED_DATA_HASHTABLE = NULL; } } umtx_destroy(&usprepMutex); /* Don't worry about destroying the mutex even */ /* if the hash table still exists. The mutex */ /* will lazily re-init itself if needed. */ return (SHARED_DATA_HASHTABLE == NULL); } U_CDECL_END static void usprep_init() { umtx_init(&usprepMutex); } /** Initializes the cache for resources */ static void initCache(UErrorCode *status) { UBool makeCache; UMTX_CHECK(&usprepMutex, (SHARED_DATA_HASHTABLE == NULL), makeCache); if(makeCache) { UHashtable *newCache = uhash_open(hashEntry, compareEntries, NULL, status); if (U_SUCCESS(*status)) { umtx_lock(&usprepMutex); if(SHARED_DATA_HASHTABLE == NULL) { SHARED_DATA_HASHTABLE = newCache; ucln_common_registerCleanup(UCLN_COMMON_USPREP, usprep_cleanup); newCache = NULL; } umtx_unlock(&usprepMutex); } if(newCache != NULL) { uhash_close(newCache); } } } static UBool U_CALLCONV loadData(UStringPrepProfile* profile, const char* path, const char* name, const char* type, UErrorCode* errorCode) { /* load Unicode SPREP data from file */ UTrie _sprepTrie={ 0,0,0,0,0,0,0 }; UDataMemory *dataMemory; const int32_t *p=NULL; const uint8_t *pb; UVersionInfo normUnicodeVersion; int32_t normUniVer, sprepUniVer, normCorrVer; if(errorCode==NULL || U_FAILURE(*errorCode)) { return 0; } /* open the data outside the mutex block */ //TODO: change the path dataMemory=udata_openChoice(path, type, name, isSPrepAcceptable, NULL, errorCode); if(U_FAILURE(*errorCode)) { return FALSE; } p=(const int32_t *)udata_getMemory(dataMemory); pb=(const uint8_t *)(p+_SPREP_INDEX_TOP); utrie_unserialize(&_sprepTrie, pb, p[_SPREP_INDEX_TRIE_SIZE], errorCode); _sprepTrie.getFoldingOffset=getSPrepFoldingOffset; if(U_FAILURE(*errorCode)) { udata_close(dataMemory); return FALSE; } /* in the mutex block, set the data for this process */ umtx_lock(&usprepMutex); if(profile->sprepData==NULL) { profile->sprepData=dataMemory; dataMemory=NULL; uprv_memcpy(&profile->indexes, p, sizeof(profile->indexes)); uprv_memcpy(&profile->sprepTrie, &_sprepTrie, sizeof(UTrie)); } else { p=(const int32_t *)udata_getMemory(profile->sprepData); } umtx_unlock(&usprepMutex); /* initialize some variables */ profile->mappingData=(uint16_t *)((uint8_t *)(p+_SPREP_INDEX_TOP)+profile->indexes[_SPREP_INDEX_TRIE_SIZE]); unorm_getUnicodeVersion(&normUnicodeVersion, errorCode); normUniVer = (normUnicodeVersion[0] << 24) + (normUnicodeVersion[1] << 16) + (normUnicodeVersion[2] << 8 ) + (normUnicodeVersion[3]); sprepUniVer = (dataVersion[0] << 24) + (dataVersion[1] << 16) + (dataVersion[2] << 8 ) + (dataVersion[3]); normCorrVer = profile->indexes[_SPREP_NORM_CORRECTNS_LAST_UNI_VERSION]; if(U_FAILURE(*errorCode)){ udata_close(dataMemory); return FALSE; } if( normUniVer < sprepUniVer && /* the Unicode version of SPREP file must be less than the Unicode Vesion of the normalization data */ normUniVer < normCorrVer && /* the Unicode version of the NormalizationCorrections.txt file should be less than the Unicode Vesion of the normalization data */ ((profile->indexes[_SPREP_OPTIONS] & _SPREP_NORMALIZATION_ON) > 0) /* normalization turned on*/ ){ *errorCode = U_INVALID_FORMAT_ERROR; udata_close(dataMemory); return FALSE; } profile->isDataLoaded = TRUE; /* if a different thread set it first, then close the extra data */ if(dataMemory!=NULL) { udata_close(dataMemory); /* NULL if it was set correctly */ } return profile->isDataLoaded; } static UStringPrepProfile* usprep_getProfile(const char* path, const char* name, UErrorCode *status){ UStringPrepProfile* profile = NULL; initCache(status); if(U_FAILURE(*status)){ return NULL; } UStringPrepKey stackKey; /* * const is cast way to save malloc, strcpy and free calls * we use the passed in pointers for fetching the data from the * hash table which is safe */ stackKey.name = (char*) name; stackKey.path = (char*) path; /* fetch the data from the cache */ umtx_lock(&usprepMutex); profile = (UStringPrepProfile*) (uhash_get(SHARED_DATA_HASHTABLE,&stackKey)); umtx_unlock(&usprepMutex); if(profile == NULL){ UStringPrepKey* key = (UStringPrepKey*) uprv_malloc(sizeof(UStringPrepKey)); if(key == NULL){ *status = U_MEMORY_ALLOCATION_ERROR; return NULL; } /* else load the data and put the data in the cache */ profile = (UStringPrepProfile*) uprv_malloc(sizeof(UStringPrepProfile)); if(profile == NULL){ *status = U_MEMORY_ALLOCATION_ERROR; uprv_free(key); return NULL; } /* initialize the data struct members */ uprv_memset(profile->indexes,0,sizeof(profile->indexes)); profile->mappingData = NULL; profile->sprepData = NULL; profile->refCount = 0; /* initialize the key memebers */ key->name = (char*) uprv_malloc(uprv_strlen(name)+1); if(key->name == NULL){ *status = U_MEMORY_ALLOCATION_ERROR; uprv_free(key); uprv_free(profile); return NULL; } uprv_strcpy(key->name, name); key->path=NULL; if(path != NULL){ key->path = (char*) uprv_malloc(uprv_strlen(path)+1); if(key->path == NULL){ *status = U_MEMORY_ALLOCATION_ERROR; uprv_free(key->name); uprv_free(key); uprv_free(profile); return NULL; } uprv_strcpy(key->path, path); } /* load the data */ if(!loadData(profile, path, name, _SPREP_DATA_TYPE, status) || U_FAILURE(*status) ){ uprv_free(key->path); uprv_free(key->name); uprv_free(key); uprv_free(profile); return NULL; } /* get the options */ profile->doNFKC = (UBool)((profile->indexes[_SPREP_OPTIONS] & _SPREP_NORMALIZATION_ON) > 0); profile->checkBiDi = (UBool)((profile->indexes[_SPREP_OPTIONS] & _SPREP_CHECK_BIDI_ON) > 0); if(profile->checkBiDi) { profile->bdp = ubidi_getSingleton(status); if(U_FAILURE(*status)) { usprep_unload(profile); uprv_free(key->path); uprv_free(key->name); uprv_free(key); uprv_free(profile); return NULL; } } else { profile->bdp = NULL; } umtx_lock(&usprepMutex); /* add the data object to the cache */ uhash_put(SHARED_DATA_HASHTABLE, key, profile, status); umtx_unlock(&usprepMutex); } umtx_lock(&usprepMutex); /* increment the refcount */ profile->refCount++; umtx_unlock(&usprepMutex); return profile; } U_CAPI UStringPrepProfile* U_EXPORT2 usprep_open(const char* path, const char* name, UErrorCode* status){ if(status == NULL || U_FAILURE(*status)){ return NULL; } /* initialize the mutex */ usprep_init(); /* initialize the profile struct members */ return usprep_getProfile(path,name,status); } U_CAPI UStringPrepProfile* U_EXPORT2 usprep_openByType(UStringPrepProfileType type, UErrorCode* status) { if(status == NULL || U_FAILURE(*status)){ return NULL; } int32_t index = (int32_t)type; if (index < 0 || index >= sizeof(PROFILE_NAMES)/sizeof(PROFILE_NAMES[0])) { *status = U_ILLEGAL_ARGUMENT_ERROR; return NULL; } return usprep_open(NULL, PROFILE_NAMES[index], status); } U_CAPI void U_EXPORT2 usprep_close(UStringPrepProfile* profile){ if(profile==NULL){ return; } umtx_lock(&usprepMutex); /* decrement the ref count*/ if(profile->refCount > 0){ profile->refCount--; } umtx_unlock(&usprepMutex); } U_CFUNC void uprv_syntaxError(const UChar* rules, int32_t pos, int32_t rulesLen, UParseError* parseError){ if(parseError == NULL){ return; } parseError->offset = pos; parseError->line = 0 ; // we are not using line numbers // for pre-context int32_t start = (pos < U_PARSE_CONTEXT_LEN)? 0 : (pos - (U_PARSE_CONTEXT_LEN-1)); int32_t limit = pos; u_memcpy(parseError->preContext,rules+start,limit-start); //null terminate the buffer parseError->preContext[limit-start] = 0; // for post-context; include error rules[pos] start = pos; limit = start + (U_PARSE_CONTEXT_LEN-1); if (limit > rulesLen) { limit = rulesLen; } if (start < rulesLen) { u_memcpy(parseError->postContext,rules+start,limit-start); } //null terminate the buffer parseError->postContext[limit-start]= 0; } static inline UStringPrepType getValues(uint16_t trieWord, int16_t& value, UBool& isIndex){ UStringPrepType type; if(trieWord == 0){ /* * Initial value stored in the mapping table * just return USPREP_TYPE_LIMIT .. so that * the source codepoint is copied to the destination */ type = USPREP_TYPE_LIMIT; isIndex =FALSE; value = 0; }else if(trieWord >= _SPREP_TYPE_THRESHOLD){ type = (UStringPrepType) (trieWord - _SPREP_TYPE_THRESHOLD); isIndex =FALSE; value = 0; }else{ /* get the type */ type = USPREP_MAP; /* ascertain if the value is index or delta */ if(trieWord & 0x02){ isIndex = TRUE; value = trieWord >> 2; //mask off the lower 2 bits and shift }else{ isIndex = FALSE; value = (int16_t)trieWord; value = (value >> 2); } if((trieWord>>2) == _SPREP_MAX_INDEX_VALUE){ type = USPREP_DELETE; isIndex =FALSE; value = 0; } } return type; } static int32_t usprep_map( const UStringPrepProfile* profile, const UChar* src, int32_t srcLength, UChar* dest, int32_t destCapacity, int32_t options, UParseError* parseError, UErrorCode* status ){ uint16_t result; int32_t destIndex=0; int32_t srcIndex; UBool allowUnassigned = (UBool) ((options & USPREP_ALLOW_UNASSIGNED)>0); UStringPrepType type; int16_t value; UBool isIndex; const int32_t* indexes = profile->indexes; // no error checking the caller check for error and arguments // no string length check the caller finds out the string length for(srcIndex=0;srcIndexsprepTrie,ch,result); type = getValues(result, value, isIndex); // check if the source codepoint is unassigned if(type == USPREP_UNASSIGNED && allowUnassigned == FALSE){ uprv_syntaxError(src,srcIndex-U16_LENGTH(ch), srcLength,parseError); *status = U_STRINGPREP_UNASSIGNED_ERROR; return 0; }else if(type == USPREP_MAP){ int32_t index, length; if(isIndex){ index = value; if(index >= indexes[_SPREP_ONE_UCHAR_MAPPING_INDEX_START] && index < indexes[_SPREP_TWO_UCHARS_MAPPING_INDEX_START]){ length = 1; }else if(index >= indexes[_SPREP_TWO_UCHARS_MAPPING_INDEX_START] && index < indexes[_SPREP_THREE_UCHARS_MAPPING_INDEX_START]){ length = 2; }else if(index >= indexes[_SPREP_THREE_UCHARS_MAPPING_INDEX_START] && index < indexes[_SPREP_FOUR_UCHARS_MAPPING_INDEX_START]){ length = 3; }else{ length = profile->mappingData[index++]; } /* copy mapping to destination */ for(int32_t i=0; i< length; i++){ if(destIndex < destCapacity ){ dest[destIndex] = profile->mappingData[index+i]; } destIndex++; /* for pre-flighting */ } continue; }else{ // subtract the delta to arrive at the code point ch -= value; } }else if(type==USPREP_DELETE){ // just consume the codepoint and contine continue; } //copy the code point into destination if(ch <= 0xFFFF){ if(destIndex < destCapacity ){ dest[destIndex] = (UChar)ch; } destIndex++; }else{ if(destIndex+1 < destCapacity ){ dest[destIndex] = U16_LEAD(ch); dest[destIndex+1] = U16_TRAIL(ch); } destIndex +=2; } } return u_terminateUChars(dest, destCapacity, destIndex, status); } static int32_t usprep_normalize( const UChar* src, int32_t srcLength, UChar* dest, int32_t destCapacity, UErrorCode* status ){ /* * Option UNORM_BEFORE_PRI_29: * * IDNA as interpreted by IETF members (see unicode mailing list 2004H1) * requires strict adherence to Unicode 3.2 normalization, * including buggy composition from before fixing Public Review Issue #29. * Note that this results in some valid but nonsensical text to be * either corrupted or rejected, depending on the text. * See http://www.unicode.org/review/resolved-pri.html#pri29 * See unorm.cpp and cnormtst.c */ return unorm_normalize( src, srcLength, UNORM_NFKC, UNORM_UNICODE_3_2|UNORM_BEFORE_PRI_29, dest, destCapacity, status); } /* 1) Map -- For each character in the input, check if it has a mapping and, if so, replace it with its mapping. 2) Normalize -- Possibly normalize the result of step 1 using Unicode normalization. 3) Prohibit -- Check for any characters that are not allowed in the output. If any are found, return an error. 4) Check bidi -- Possibly check for right-to-left characters, and if any are found, make sure that the whole string satisfies the requirements for bidirectional strings. If the string does not satisfy the requirements for bidirectional strings, return an error. [Unicode3.2] defines several bidirectional categories; each character has one bidirectional category assigned to it. For the purposes of the requirements below, an "RandALCat character" is a character that has Unicode bidirectional categories "R" or "AL"; an "LCat character" is a character that has Unicode bidirectional category "L". Note that there are many characters which fall in neither of the above definitions; Latin digits ( through ) are examples of this because they have bidirectional category "EN". In any profile that specifies bidirectional character handling, all three of the following requirements MUST be met: 1) The characters in section 5.8 MUST be prohibited. 2) If a string contains any RandALCat character, the string MUST NOT contain any LCat character. 3) If a string contains any RandALCat character, a RandALCat character MUST be the first character of the string, and a RandALCat character MUST be the last character of the string. */ #define MAX_STACK_BUFFER_SIZE 300 U_CAPI int32_t U_EXPORT2 usprep_prepare( const UStringPrepProfile* profile, const UChar* src, int32_t srcLength, UChar* dest, int32_t destCapacity, int32_t options, UParseError* parseError, UErrorCode* status ){ // check error status if(status == NULL || U_FAILURE(*status)){ return 0; } //check arguments if(profile==NULL || src==NULL || srcLength<-1 || (dest==NULL && destCapacity!=0)) { *status=U_ILLEGAL_ARGUMENT_ERROR; return 0; } UChar b1Stack[MAX_STACK_BUFFER_SIZE], b2Stack[MAX_STACK_BUFFER_SIZE]; UChar *b1 = b1Stack, *b2 = b2Stack; int32_t b1Len, b2Len=0, b1Capacity = MAX_STACK_BUFFER_SIZE , b2Capacity = MAX_STACK_BUFFER_SIZE; uint16_t result; int32_t b2Index = 0; UCharDirection direction=U_CHAR_DIRECTION_COUNT, firstCharDir=U_CHAR_DIRECTION_COUNT; UBool leftToRight=FALSE, rightToLeft=FALSE; int32_t rtlPos =-1, ltrPos =-1; //get the string length if(srcLength == -1){ srcLength = u_strlen(src); } // map b1Len = usprep_map(profile, src, srcLength, b1, b1Capacity, options, parseError, status); if(*status == U_BUFFER_OVERFLOW_ERROR){ // redo processing of string /* we do not have enough room so grow the buffer*/ b1 = (UChar*) uprv_malloc(b1Len * U_SIZEOF_UCHAR); if(b1==NULL){ *status = U_MEMORY_ALLOCATION_ERROR; goto CLEANUP; } *status = U_ZERO_ERROR; // reset error b1Len = usprep_map(profile, src, srcLength, b1, b1Len, options, parseError, status); } // normalize if(profile->doNFKC == TRUE){ b2Len = usprep_normalize(b1,b1Len, b2,b2Capacity,status); if(*status == U_BUFFER_OVERFLOW_ERROR){ // redo processing of string /* we do not have enough room so grow the buffer*/ b2 = (UChar*) uprv_malloc(b2Len * U_SIZEOF_UCHAR); if(b2==NULL){ *status = U_MEMORY_ALLOCATION_ERROR; goto CLEANUP; } *status = U_ZERO_ERROR; // reset error b2Len = usprep_normalize(b1,b1Len, b2,b2Len,status); } }else{ b2 = b1; b2Len = b1Len; } if(U_FAILURE(*status)){ goto CLEANUP; } UChar32 ch; UStringPrepType type; int16_t value; UBool isIndex; // Prohibit and checkBiDi in one pass for(b2Index=0; b2IndexsprepTrie,ch,result); type = getValues(result, value, isIndex); if( type == USPREP_PROHIBITED || ((result < _SPREP_TYPE_THRESHOLD) && (result & 0x01) /* first bit says it the code point is prohibited*/) ){ *status = U_STRINGPREP_PROHIBITED_ERROR; uprv_syntaxError(b1, b2Index-U16_LENGTH(ch), b2Len, parseError); goto CLEANUP; } if(profile->checkBiDi) { direction = ubidi_getClass(profile->bdp, ch); if(firstCharDir == U_CHAR_DIRECTION_COUNT){ firstCharDir = direction; } if(direction == U_LEFT_TO_RIGHT){ leftToRight = TRUE; ltrPos = b2Index-1; } if(direction == U_RIGHT_TO_LEFT || direction == U_RIGHT_TO_LEFT_ARABIC){ rightToLeft = TRUE; rtlPos = b2Index-1; } } } if(profile->checkBiDi == TRUE){ // satisfy 2 if( leftToRight == TRUE && rightToLeft == TRUE){ *status = U_STRINGPREP_CHECK_BIDI_ERROR; uprv_syntaxError(b2,(rtlPos>ltrPos) ? rtlPos : ltrPos, b2Len, parseError); goto CLEANUP; } //satisfy 3 if( rightToLeft == TRUE && !((firstCharDir == U_RIGHT_TO_LEFT || firstCharDir == U_RIGHT_TO_LEFT_ARABIC) && (direction == U_RIGHT_TO_LEFT || direction == U_RIGHT_TO_LEFT_ARABIC)) ){ *status = U_STRINGPREP_CHECK_BIDI_ERROR; uprv_syntaxError(b2, rtlPos, b2Len, parseError); return FALSE; } } if(b2Len>0 && b2Len <= destCapacity){ uprv_memmove(dest,b2, b2Len*U_SIZEOF_UCHAR); } CLEANUP: if(b1!=b1Stack){ uprv_free(b1); b1=NULL; } if(b2!=b1Stack && b2!=b2Stack && b2!=b1 /* b1 should not be freed twice */){ uprv_free(b2); b2=NULL; } return u_terminateUChars(dest, destCapacity, b2Len, status); } /* data swapping ------------------------------------------------------------ */ U_CAPI int32_t U_EXPORT2 usprep_swap(const UDataSwapper *ds, const void *inData, int32_t length, void *outData, UErrorCode *pErrorCode) { const UDataInfo *pInfo; int32_t headerSize; const uint8_t *inBytes; uint8_t *outBytes; const int32_t *inIndexes; int32_t indexes[16]; int32_t i, offset, count, size; /* udata_swapDataHeader checks the arguments */ headerSize=udata_swapDataHeader(ds, inData, length, outData, pErrorCode); if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) { return 0; } /* check data format and format version */ pInfo=(const UDataInfo *)((const char *)inData+4); if(!( pInfo->dataFormat[0]==0x53 && /* dataFormat="SPRP" */ pInfo->dataFormat[1]==0x50 && pInfo->dataFormat[2]==0x52 && pInfo->dataFormat[3]==0x50 && pInfo->formatVersion[0]==3 )) { udata_printError(ds, "usprep_swap(): data format %02x.%02x.%02x.%02x (format version %02x) is not recognized as StringPrep .spp data\n", pInfo->dataFormat[0], pInfo->dataFormat[1], pInfo->dataFormat[2], pInfo->dataFormat[3], pInfo->formatVersion[0]); *pErrorCode=U_UNSUPPORTED_ERROR; return 0; } inBytes=(const uint8_t *)inData+headerSize; outBytes=(uint8_t *)outData+headerSize; inIndexes=(const int32_t *)inBytes; if(length>=0) { length-=headerSize; if(length<16*4) { udata_printError(ds, "usprep_swap(): too few bytes (%d after header) for StringPrep .spp data\n", length); *pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR; return 0; } } /* read the first 16 indexes (ICU 2.8/format version 3: _SPREP_INDEX_TOP==16, might grow) */ for(i=0; i<16; ++i) { indexes[i]=udata_readInt32(ds, inIndexes[i]); } /* calculate the total length of the data */ size= 16*4+ /* size of indexes[] */ indexes[_SPREP_INDEX_TRIE_SIZE]+ indexes[_SPREP_INDEX_MAPPING_DATA_SIZE]; if(length>=0) { if(lengthswapArray32(ds, inBytes, count, outBytes, pErrorCode); offset+=count; /* swap the UTrie */ count=indexes[_SPREP_INDEX_TRIE_SIZE]; utrie_swap(ds, inBytes+offset, count, outBytes+offset, pErrorCode); offset+=count; /* swap the uint16_t mappingTable[] */ count=indexes[_SPREP_INDEX_MAPPING_DATA_SIZE]; ds->swapArray16(ds, inBytes+offset, count, outBytes+offset, pErrorCode); offset+=count; } return headerSize+size; } #endif /* #if !UCONFIG_NO_IDNA */