2 *******************************************************************************
4 * Copyright (C) 2003-2011, International Business Machines
5 * Corporation and others. All Rights Reserved.
7 *******************************************************************************
8 * file name: idnaref.cpp
10 * tab size: 8 (not used)
13 * created on: 2003feb1
14 * created by: Ram Viswanadha
17 #include "unicode/utypes.h"
19 #if !UCONFIG_NO_IDNA && !UCONFIG_NO_TRANSLITERATION
28 #include "unicode/ustring.h"
30 /* it is official IDNA ACE Prefix is "xn--" */
31 static const UChar ACE_PREFIX[] ={ 0x0078,0x006E,0x002d,0x002d } ;
32 #define ACE_PREFIX_LENGTH 4
34 #define MAX_LABEL_LENGTH 63
36 /* The Max length of the labels should not be more than 64 */
37 #define MAX_LABEL_BUFFER_SIZE 100
38 #define MAX_IDN_BUFFER_SIZE 300
40 #define CAPITAL_A 0x0041
41 #define CAPITAL_Z 0x005A
42 #define LOWER_CASE_DELTA 0x0020
43 #define FULL_STOP 0x002E
47 startsWithPrefix(const UChar* src , int32_t srcLength){
48 UBool startsWithPrefix = TRUE;
50 if(srcLength < ACE_PREFIX_LENGTH){
54 for(int8_t i=0; i< ACE_PREFIX_LENGTH; i++){
55 if(u_tolower(src[i]) != ACE_PREFIX[i]){
56 startsWithPrefix = FALSE;
59 return startsWithPrefix;
63 toASCIILower(UChar ch){
64 if(CAPITAL_A <= ch && ch <= CAPITAL_Z){
65 return ch + LOWER_CASE_DELTA;
71 compareCaseInsensitiveASCII(const UChar* s1, int32_t s1Len,
72 const UChar* s2, int32_t s2Len){
74 return (s1Len > s2Len) ? s1Len : s2Len;
79 for(int32_t i =0;/* no condition */;i++) {
80 /* If we reach the ends of both strings then they match */
88 /* Case-insensitive comparison */
90 rc=(int32_t)toASCIILower(c1)-(int32_t)toASCIILower(c2);
99 static UErrorCode getError(enum punycode_status status){
101 case punycode_success:
103 case punycode_bad_input: /* Input is invalid. */
104 return U_INVALID_CHAR_FOUND;
105 case punycode_big_output: /* Output would exceed the space provided. */
106 return U_BUFFER_OVERFLOW_ERROR;
107 case punycode_overflow : /* Input requires wider integers to process. */
108 return U_INDEX_OUTOFBOUNDS_ERROR;
110 return U_INTERNAL_PROGRAM_ERROR;
114 static inline int32_t convertASCIIToUChars(const char* src,UChar* dest, int32_t length){
116 for(i=0;i<length;i++){
121 static inline int32_t convertUCharsToASCII(const UChar* src,char* dest, int32_t length){
123 for(i=0;i<length;i++){
124 dest[i] = (char)src[i];
128 // wrapper around the reference Punycode implementation
129 static int32_t convertToPuny(const UChar* src, int32_t srcLength,
130 UChar* dest, int32_t destCapacity,
132 uint32_t b1Stack[MAX_LABEL_BUFFER_SIZE];
133 int32_t b1Len = 0, b1Capacity = MAX_LABEL_BUFFER_SIZE;
134 uint32_t* b1 = b1Stack;
135 char b2Stack[MAX_LABEL_BUFFER_SIZE];
137 int32_t b2Len =MAX_LABEL_BUFFER_SIZE ;
138 punycode_status error;
139 unsigned char* caseFlags = NULL;
141 u_strToUTF32((UChar32*)b1,b1Capacity,&b1Len,src,srcLength,&status);
142 if(status == U_BUFFER_OVERFLOW_ERROR){
143 // redo processing of string
144 /* we do not have enough room so grow the buffer*/
145 b1 = (uint32_t*) uprv_malloc(b1Len * sizeof(uint32_t));
147 status = U_MEMORY_ALLOCATION_ERROR;
151 status = U_ZERO_ERROR; // reset error
153 u_strToUTF32((UChar32*)b1,b1Len,&b1Len,src,srcLength,&status);
155 if(U_FAILURE(status)){
159 //caseFlags = (unsigned char*) uprv_malloc(b1Len *sizeof(unsigned char));
161 error = punycode_encode(b1Len,b1,caseFlags, (uint32_t*)&b2Len, b2);
162 status = getError(error);
164 if(status == U_BUFFER_OVERFLOW_ERROR){
165 /* we do not have enough room so grow the buffer*/
166 b2 = (char*) uprv_malloc( b2Len * sizeof(char));
168 status = U_MEMORY_ALLOCATION_ERROR;
172 status = U_ZERO_ERROR; // reset error
174 punycode_status error = punycode_encode(b1Len,b1,caseFlags, (uint32_t*)&b2Len, b2);
175 status = getError(error);
177 if(U_FAILURE(status)){
181 if(b2Len < destCapacity){
182 convertASCIIToUChars(b2,dest,b2Len);
184 status =U_BUFFER_OVERFLOW_ERROR;
194 uprv_free(caseFlags);
199 static int32_t convertFromPuny( const UChar* src, int32_t srcLength,
200 UChar* dest, int32_t destCapacity,
202 char b1Stack[MAX_LABEL_BUFFER_SIZE];
206 convertUCharsToASCII(src, b1,srcLength);
208 uint32_t b2Stack[MAX_LABEL_BUFFER_SIZE];
209 uint32_t* b2 = b2Stack;
210 int32_t b2Len =MAX_LABEL_BUFFER_SIZE;
211 unsigned char* caseFlags = NULL; //(unsigned char*) uprv_malloc(srcLength * sizeof(unsigned char*));
212 punycode_status error = punycode_decode(srcLength,b1,(uint32_t*)&b2Len,b2,caseFlags);
213 status = getError(error);
214 if(status == U_BUFFER_OVERFLOW_ERROR){
215 b2 = (uint32_t*) uprv_malloc(b2Len * sizeof(uint32_t));
217 status = U_MEMORY_ALLOCATION_ERROR;
220 error = punycode_decode(srcLength,b1,(uint32_t*)&b2Len,b2,caseFlags);
221 status = getError(error);
224 if(U_FAILURE(status)){
228 u_strFromUTF32(dest,destCapacity,&destLen,(UChar32*)b2,b2Len,&status);
237 uprv_free(caseFlags);
243 U_CFUNC int32_t U_EXPORT2
244 idnaref_toASCII(const UChar* src, int32_t srcLength,
245 UChar* dest, int32_t destCapacity,
247 UParseError* parseError,
250 if(status == NULL || U_FAILURE(*status)){
253 if((src == NULL) || (srcLength < -1) || (destCapacity<0) || (!dest && destCapacity > 0)){
254 *status = U_ILLEGAL_ARGUMENT_ERROR;
257 UChar b1Stack[MAX_LABEL_BUFFER_SIZE], b2Stack[MAX_LABEL_BUFFER_SIZE];
258 //initialize pointers to stack buffers
259 UChar *b1 = b1Stack, *b2 = b2Stack;
260 int32_t b1Len=0, b2Len=0,
261 b1Capacity = MAX_LABEL_BUFFER_SIZE,
262 b2Capacity = MAX_LABEL_BUFFER_SIZE ,
266 UBool allowUnassigned = (UBool)((options & IDNAREF_ALLOW_UNASSIGNED) != 0);
267 UBool useSTD3ASCIIRules = (UBool)((options & IDNAREF_USE_STD3_RULES) != 0);
269 UBool* caseFlags = NULL;
271 // assume the source contains all ascii codepoints
272 UBool srcIsASCII = TRUE;
273 // assume the source contains all LDH codepoints
274 UBool srcIsLDH = TRUE;
278 srcLength = u_strlen(src);
282 for( j=0;j<srcLength;j++){
286 b1[b1Len++] = src[j];
289 NamePrepTransform* prep = TestIDNA::getInstance(*status);
290 if(U_FAILURE(*status)){
294 // step 2 is performed only if the source contains non ASCII
296 b1Len = prep->process(src,srcLength,b1, b1Capacity,allowUnassigned,parseError,*status);
298 if(*status == U_BUFFER_OVERFLOW_ERROR){
299 // redo processing of string
300 /* we do not have enough room so grow the buffer*/
301 b1 = (UChar*) uprv_malloc(b1Len * U_SIZEOF_UCHAR);
303 *status = U_MEMORY_ALLOCATION_ERROR;
307 *status = U_ZERO_ERROR; // reset error
309 b1Len = prep->process(src,srcLength,b1, b1Len,allowUnassigned, parseError, *status);
312 if(U_FAILURE(*status)){
318 *status = U_IDNA_ZERO_LENGTH_LABEL_ERROR;
324 for( j=0;j<b1Len;j++){
325 if(b1[j] > 0x7F){// check if output of usprep_prepare is all ASCII
327 }else if(prep->isLDHChar(b1[j])==FALSE){ // if the char is in ASCII range verify that it is an LDH character{
332 if(useSTD3ASCIIRules == TRUE){
334 if( srcIsLDH == FALSE /* source contains some non-LDH characters */
335 || b1[0] == HYPHEN || b1[b1Len-1] == HYPHEN){
336 *status = U_IDNA_STD3_ASCII_RULES_ERROR;
341 if(b1Len <= destCapacity){
342 uprv_memmove(dest, b1, b1Len * U_SIZEOF_UCHAR);
349 // step 5 : verify the sequence does not begin with ACE prefix
350 if(!startsWithPrefix(b1,b1Len)){
352 //step 6: encode the sequence with punycode
353 //caseFlags = (UBool*) uprv_malloc(b1Len * sizeof(UBool));
355 b2Len = convertToPuny(b1,b1Len, b2,b2Capacity,*status);
356 //b2Len = u_strToPunycode(b2,b2Capacity,b1,b1Len, caseFlags, status);
357 if(*status == U_BUFFER_OVERFLOW_ERROR){
358 // redo processing of string
359 /* we do not have enough room so grow the buffer*/
360 b2 = (UChar*) uprv_malloc(b2Len * U_SIZEOF_UCHAR);
362 *status = U_MEMORY_ALLOCATION_ERROR;
366 *status = U_ZERO_ERROR; // reset error
368 b2Len = convertToPuny(b1, b1Len, b2, b2Len, *status);
369 //b2Len = u_strToPunycode(b2,b2Len,b1,b1Len, caseFlags, status);
373 if(U_FAILURE(*status)){
376 reqLength = b2Len+ACE_PREFIX_LENGTH;
378 if(reqLength > destCapacity){
379 *status = U_BUFFER_OVERFLOW_ERROR;
382 //Step 7: prepend the ACE prefix
383 uprv_memcpy(dest,ACE_PREFIX,ACE_PREFIX_LENGTH * U_SIZEOF_UCHAR);
384 //Step 6: copy the contents in b2 into dest
385 uprv_memcpy(dest+ACE_PREFIX_LENGTH, b2, b2Len * U_SIZEOF_UCHAR);
388 *status = U_IDNA_ACE_PREFIX_ERROR;
393 if(reqLength > MAX_LABEL_LENGTH){
394 *status = U_IDNA_LABEL_TOO_LONG_ERROR;
404 uprv_free(caseFlags);
408 return u_terminateUChars(dest, destCapacity, reqLength, status);
412 U_CFUNC int32_t U_EXPORT2
413 idnaref_toUnicode(const UChar* src, int32_t srcLength,
414 UChar* dest, int32_t destCapacity,
416 UParseError* parseError,
419 if(status == NULL || U_FAILURE(*status)){
422 if((src == NULL) || (srcLength < -1) || (destCapacity<0) || (!dest && destCapacity > 0)){
423 *status = U_ILLEGAL_ARGUMENT_ERROR;
429 UChar b1Stack[MAX_LABEL_BUFFER_SIZE], b2Stack[MAX_LABEL_BUFFER_SIZE], b3Stack[MAX_LABEL_BUFFER_SIZE];
431 //initialize pointers to stack buffers
432 UChar *b1 = b1Stack, *b2 = b2Stack, *b1Prime=NULL, *b3=b3Stack;
433 int32_t b1Len, b2Len, b1PrimeLen, b3Len,
434 b1Capacity = MAX_LABEL_BUFFER_SIZE,
435 b2Capacity = MAX_LABEL_BUFFER_SIZE,
436 b3Capacity = MAX_LABEL_BUFFER_SIZE,
438 // UParseError parseError;
440 NamePrepTransform* prep = TestIDNA::getInstance(*status);
442 UBool* caseFlags = NULL;
445 UBool allowUnassigned = (UBool)((options & IDNAREF_ALLOW_UNASSIGNED) != 0);
446 UBool useSTD3ASCIIRules = (UBool)((options & IDNAREF_USE_STD3_RULES) != 0);
448 UBool srcIsASCII = TRUE;
449 UBool srcIsLDH = TRUE;
452 if(U_FAILURE(*status)){
455 // step 1: find out if all the codepoints in src are ASCII
458 for(;src[srcLength]!=0;){
459 if(src[srcLength]> 0x7f){
461 }if(prep->isLDHChar(src[srcLength])==FALSE){
462 // here we do not assemble surrogates
463 // since we know that LDH code points
464 // are in the ASCII range only
471 for(int32_t j=0; j<srcLength; j++){
474 }else if(prep->isLDHChar(src[j])==FALSE){
475 // here we do not assemble surrogates
476 // since we know that LDH code points
477 // are in the ASCII range only
484 if(srcIsASCII == FALSE){
485 // step 2: process the string
486 b1Len = prep->process(src,srcLength,b1,b1Capacity,allowUnassigned, parseError, *status);
487 if(*status == U_BUFFER_OVERFLOW_ERROR){
488 // redo processing of string
489 /* we do not have enough room so grow the buffer*/
490 b1 = (UChar*) uprv_malloc(b1Len * U_SIZEOF_UCHAR);
492 *status = U_MEMORY_ALLOCATION_ERROR;
496 *status = U_ZERO_ERROR; // reset error
498 b1Len = prep->process(src,srcLength,b1, b1Len,allowUnassigned, parseError, *status);
501 if(U_FAILURE(*status)){
506 // copy everything to b1
507 if(srcLength < b1Capacity){
508 uprv_memmove(b1,src, srcLength * U_SIZEOF_UCHAR);
510 /* we do not have enough room so grow the buffer*/
511 b1 = (UChar*) uprv_malloc(srcLength * U_SIZEOF_UCHAR);
513 *status = U_MEMORY_ALLOCATION_ERROR;
516 uprv_memmove(b1,src, srcLength * U_SIZEOF_UCHAR);
520 //step 3: verify ACE Prefix
521 if(startsWithPrefix(src,srcLength)){
523 //step 4: Remove the ACE Prefix
524 b1Prime = b1 + ACE_PREFIX_LENGTH;
525 b1PrimeLen = b1Len - ACE_PREFIX_LENGTH;
527 //step 5: Decode using punycode
528 b2Len = convertFromPuny(b1Prime,b1PrimeLen, b2, b2Capacity, *status);
529 //b2Len = u_strFromPunycode(b2, b2Capacity,b1Prime,b1PrimeLen, caseFlags, status);
531 if(*status == U_BUFFER_OVERFLOW_ERROR){
532 // redo processing of string
533 /* we do not have enough room so grow the buffer*/
534 b2 = (UChar*) uprv_malloc(b2Len * U_SIZEOF_UCHAR);
536 *status = U_MEMORY_ALLOCATION_ERROR;
540 *status = U_ZERO_ERROR; // reset error
542 b2Len = convertFromPuny(b1Prime,b1PrimeLen, b2, b2Len, *status);
543 //b2Len = u_strFromPunycode(b2, b2Len,b1Prime,b1PrimeLen,caseFlags, status);
547 //step 6:Apply toASCII
548 b3Len = idnaref_toASCII(b2,b2Len,b3,b3Capacity,options,parseError, status);
550 if(*status == U_BUFFER_OVERFLOW_ERROR){
551 // redo processing of string
552 /* we do not have enough room so grow the buffer*/
553 b3 = (UChar*) uprv_malloc(b3Len * U_SIZEOF_UCHAR);
555 *status = U_MEMORY_ALLOCATION_ERROR;
559 *status = U_ZERO_ERROR; // reset error
561 b3Len = idnaref_toASCII(b2,b2Len,b3,b3Len, options, parseError, status);
565 if(U_FAILURE(*status)){
570 if(compareCaseInsensitiveASCII(b1, b1Len, b3, b3Len) !=0){
571 *status = U_IDNA_VERIFICATION_ERROR;
575 //step 8: return output of step 5
577 if(b2Len <= destCapacity) {
578 uprv_memmove(dest, b2, b2Len * U_SIZEOF_UCHAR);
581 // verify that STD3 ASCII rules are satisfied
582 if(useSTD3ASCIIRules == TRUE){
583 if( srcIsLDH == FALSE /* source contains some non-LDH characters */
584 || src[0] == HYPHEN || src[srcLength-1] == HYPHEN){
585 *status = U_IDNA_STD3_ASCII_RULES_ERROR;
587 /* populate the parseError struct */
589 // failPos is always set the index of failure
590 uprv_syntaxError(src,failPos, srcLength,parseError);
591 }else if(src[0] == HYPHEN){
592 // fail position is 0
593 uprv_syntaxError(src,0,srcLength,parseError);
595 // the last index in the source is always length-1
596 uprv_syntaxError(src, (srcLength>0) ? srcLength-1 : srcLength, srcLength,parseError);
602 //copy the source to destination
603 if(srcLength <= destCapacity){
604 uprv_memmove(dest,src,srcLength * U_SIZEOF_UCHAR);
606 reqLength = srcLength;
617 uprv_free(caseFlags);
619 // The RFC states that
621 // ToUnicode never fails. If any step fails, then the original input
622 // is returned immediately in that step.
624 // So if any step fails lets copy source to destination
625 if(U_FAILURE(*status)){
626 //copy the source to destination
627 if(dest && srcLength <= destCapacity){
628 if(srcLength == -1) {
629 uprv_memmove(dest,src,u_strlen(src)* U_SIZEOF_UCHAR);
631 uprv_memmove(dest,src,srcLength * U_SIZEOF_UCHAR);
634 reqLength = srcLength;
635 *status = U_ZERO_ERROR;
637 return u_terminateUChars(dest, destCapacity, reqLength, status);
642 getNextSeparator(UChar *src,int32_t srcLength,NamePrepTransform* prep,
650 *limit = src + i; // point to null
654 if(prep->isLabelSeparator(src[i],*status)){
655 *limit = src + (i+1); // go past the delimiter
662 for(i=0;i<srcLength;i++){
663 if(prep->isLabelSeparator(src[i],*status)){
664 *limit = src + (i+1); // go past the delimiter
668 // we have not found the delimiter
670 *limit = src+srcLength;
677 U_CFUNC int32_t U_EXPORT2
678 idnaref_IDNToASCII( const UChar* src, int32_t srcLength,
679 UChar* dest, int32_t destCapacity,
681 UParseError* parseError,
684 if(status == NULL || U_FAILURE(*status)){
687 if((src == NULL) || (srcLength < -1) || (destCapacity<0) || (!dest && destCapacity > 0)){
688 *status = U_ILLEGAL_ARGUMENT_ERROR;
692 int32_t reqLength = 0;
693 // UParseError parseError;
695 NamePrepTransform* prep = TestIDNA::getInstance(*status);
697 //initialize pointers to stack buffers
698 UChar b1Stack[MAX_LABEL_BUFFER_SIZE];
700 int32_t b1Len, labelLen;
701 UChar* delimiter = (UChar*)src;
702 UChar* labelStart = (UChar*)src;
703 int32_t remainingLen = srcLength;
704 int32_t b1Capacity = MAX_LABEL_BUFFER_SIZE;
707 // UBool allowUnassigned = (UBool)((options & IDNAREF_ALLOW_UNASSIGNED) != 0);
708 // UBool useSTD3ASCIIRules = (UBool)((options & IDNAREF_USE_STD3_RULES) != 0);
711 if(U_FAILURE(*status)){
723 labelLen = getNextSeparator(labelStart, -1, prep, &delimiter, &done, status);
725 if(!(labelLen==0 && done)){// make sure this is not a root label separator.
727 b1Len = idnaref_toASCII(labelStart, labelLen, b1, b1Capacity,
728 options, parseError, status);
730 if(*status == U_BUFFER_OVERFLOW_ERROR){
731 // redo processing of string
732 /* we do not have enough room so grow the buffer*/
733 b1 = (UChar*) uprv_malloc(b1Len * U_SIZEOF_UCHAR);
735 *status = U_MEMORY_ALLOCATION_ERROR;
739 *status = U_ZERO_ERROR; // reset error
741 b1Len = idnaref_toASCII(labelStart, labelLen, b1, b1Len,
742 options, parseError, status);
747 if(U_FAILURE(*status)){
750 int32_t tempLen = (reqLength + b1Len );
752 if( tempLen< destCapacity){
753 uprv_memmove(dest+reqLength, b1, b1Len * U_SIZEOF_UCHAR);
758 // add the label separator
760 if(reqLength < destCapacity){
761 dest[reqLength] = FULL_STOP;
766 labelStart = delimiter;
771 if(delimiter == src+srcLength){
775 labelLen = getNextSeparator(labelStart, remainingLen, prep, &delimiter, &done, status);
777 b1Len = idnaref_toASCII(labelStart, labelLen, b1, b1Capacity,
778 options,parseError, status);
780 if(*status == U_BUFFER_OVERFLOW_ERROR){
781 // redo processing of string
782 /* we do not have enough room so grow the buffer*/
783 b1 = (UChar*) uprv_malloc(b1Len * U_SIZEOF_UCHAR);
785 *status = U_MEMORY_ALLOCATION_ERROR;
789 *status = U_ZERO_ERROR; // reset error
791 b1Len = idnaref_toASCII(labelStart, labelLen, b1, b1Len,
792 options, parseError, status);
796 if(U_FAILURE(*status)){
799 int32_t tempLen = (reqLength + b1Len );
801 if( tempLen< destCapacity){
802 uprv_memmove(dest+reqLength, b1, b1Len * U_SIZEOF_UCHAR);
807 // add the label separator
809 if(reqLength < destCapacity){
810 dest[reqLength] = FULL_STOP;
815 labelStart = delimiter;
816 remainingLen = srcLength - (delimiter - src);
829 return u_terminateUChars(dest, destCapacity, reqLength, status);
832 U_CFUNC int32_t U_EXPORT2
833 idnaref_IDNToUnicode( const UChar* src, int32_t srcLength,
834 UChar* dest, int32_t destCapacity,
836 UParseError* parseError,
839 if(status == NULL || U_FAILURE(*status)){
842 if((src == NULL) || (srcLength < -1) || (destCapacity<0) || (!dest && destCapacity > 0)){
843 *status = U_ILLEGAL_ARGUMENT_ERROR;
847 int32_t reqLength = 0;
851 NamePrepTransform* prep = TestIDNA::getInstance(*status);
853 //initialize pointers to stack buffers
854 UChar b1Stack[MAX_LABEL_BUFFER_SIZE];
856 int32_t b1Len, labelLen;
857 UChar* delimiter = (UChar*)src;
858 UChar* labelStart = (UChar*)src;
859 int32_t remainingLen = srcLength;
860 int32_t b1Capacity = MAX_LABEL_BUFFER_SIZE;
863 // UBool allowUnassigned = (UBool)((options & IDNAREF_ALLOW_UNASSIGNED) != 0);
864 // UBool useSTD3ASCIIRules = (UBool)((options & IDNAREF_USE_STD3_RULES) != 0);
866 if(U_FAILURE(*status)){
877 labelLen = getNextSeparator(labelStart, -1, prep, &delimiter, &done, status);
879 if(labelLen==0 && done==FALSE){
880 *status = U_IDNA_ZERO_LENGTH_LABEL_ERROR;
882 b1Len = idnaref_toUnicode(labelStart, labelLen, b1, b1Capacity,
883 options, parseError, status);
885 if(*status == U_BUFFER_OVERFLOW_ERROR){
886 // redo processing of string
887 /* we do not have enough room so grow the buffer*/
888 b1 = (UChar*) uprv_malloc(b1Len * U_SIZEOF_UCHAR);
890 *status = U_MEMORY_ALLOCATION_ERROR;
894 *status = U_ZERO_ERROR; // reset error
896 b1Len = idnaref_toUnicode( labelStart, labelLen, b1, b1Len,
897 options, parseError, status);
901 if(U_FAILURE(*status)){
904 int32_t tempLen = (reqLength + b1Len );
906 if( tempLen< destCapacity){
907 uprv_memmove(dest+reqLength, b1, b1Len * U_SIZEOF_UCHAR);
911 // add the label separator
913 if(reqLength < destCapacity){
914 dest[reqLength] = FULL_STOP;
919 labelStart = delimiter;
924 if(delimiter == src+srcLength){
928 labelLen = getNextSeparator(labelStart, remainingLen, prep, &delimiter, &done, status);
930 if(labelLen==0 && done==FALSE){
931 *status = U_IDNA_ZERO_LENGTH_LABEL_ERROR;
934 b1Len = idnaref_toUnicode( labelStart,labelLen, b1, b1Capacity,
935 options, parseError, status);
937 if(*status == U_BUFFER_OVERFLOW_ERROR){
938 // redo processing of string
939 /* we do not have enough room so grow the buffer*/
940 b1 = (UChar*) uprv_malloc(b1Len * U_SIZEOF_UCHAR);
942 *status = U_MEMORY_ALLOCATION_ERROR;
946 *status = U_ZERO_ERROR; // reset error
948 b1Len = idnaref_toUnicode( labelStart, labelLen, b1, b1Len,
949 options, parseError, status);
953 if(U_FAILURE(*status)){
956 int32_t tempLen = (reqLength + b1Len );
958 if( tempLen< destCapacity){
959 uprv_memmove(dest+reqLength, b1, b1Len * U_SIZEOF_UCHAR);
964 // add the label separator
966 if(reqLength < destCapacity){
967 dest[reqLength] = FULL_STOP;
972 labelStart = delimiter;
973 remainingLen = srcLength - (delimiter - src);
985 return u_terminateUChars(dest, destCapacity, reqLength, status);
988 U_CFUNC int32_t U_EXPORT2
989 idnaref_compare( const UChar *s1, int32_t length1,
990 const UChar *s2, int32_t length2,
994 if(status == NULL || U_FAILURE(*status)){
998 UChar b1Stack[MAX_IDN_BUFFER_SIZE], b2Stack[MAX_IDN_BUFFER_SIZE];
999 UChar *b1 = b1Stack, *b2 = b2Stack;
1000 int32_t b1Len, b2Len, b1Capacity = MAX_IDN_BUFFER_SIZE, b2Capacity = MAX_IDN_BUFFER_SIZE;
1001 int32_t result = -1;
1003 UParseError parseError;
1005 b1Len = idnaref_IDNToASCII(s1, length1, b1, b1Capacity, options, &parseError, status);
1006 if(*status == U_BUFFER_OVERFLOW_ERROR){
1007 // redo processing of string
1008 /* we do not have enough room so grow the buffer*/
1009 b1 = (UChar*) uprv_malloc(b1Len * U_SIZEOF_UCHAR);
1011 *status = U_MEMORY_ALLOCATION_ERROR;
1015 *status = U_ZERO_ERROR; // reset error
1017 b1Len = idnaref_IDNToASCII(s1,length1,b1,b1Len, options, &parseError, status);
1021 b2Len = idnaref_IDNToASCII(s2,length2,b2,b2Capacity,options, &parseError, status);
1022 if(*status == U_BUFFER_OVERFLOW_ERROR){
1023 // redo processing of string
1024 /* we do not have enough room so grow the buffer*/
1025 b2 = (UChar*) uprv_malloc(b2Len * U_SIZEOF_UCHAR);
1027 *status = U_MEMORY_ALLOCATION_ERROR;
1031 *status = U_ZERO_ERROR; // reset error
1033 b2Len = idnaref_IDNToASCII(s2,length2,b2,b2Len,options, &parseError, status);
1036 // when toASCII is applied all label separators are replaced with FULL_STOP
1037 result = compareCaseInsensitiveASCII(b1,b1Len,b2,b2Len);
1050 #endif /* #if !UCONFIG_NO_IDNA */