1 // Copyright (C) 2016 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
4 *******************************************************************************
6 * Copyright (C) 2003-2011, International Business Machines
7 * Corporation and others. All Rights Reserved.
9 *******************************************************************************
10 * file name: idnaref.cpp
12 * tab size: 8 (not used)
15 * created on: 2003feb1
16 * created by: Ram Viswanadha
19 #include "unicode/utypes.h"
21 #if !UCONFIG_NO_IDNA && !UCONFIG_NO_TRANSLITERATION
30 #include "unicode/ustring.h"
32 /* it is official IDNA ACE Prefix is "xn--" */
33 static const UChar ACE_PREFIX[] ={ 0x0078,0x006E,0x002d,0x002d } ;
34 #define ACE_PREFIX_LENGTH 4
36 #define MAX_LABEL_LENGTH 63
38 /* The Max length of the labels should not be more than 64 */
39 #define MAX_LABEL_BUFFER_SIZE 100
40 #define MAX_IDN_BUFFER_SIZE 300
42 #define CAPITAL_A 0x0041
43 #define CAPITAL_Z 0x005A
44 #define LOWER_CASE_DELTA 0x0020
45 #define FULL_STOP 0x002E
49 startsWithPrefix(const UChar* src , int32_t srcLength){
50 UBool startsWithPrefix = TRUE;
52 if(srcLength < ACE_PREFIX_LENGTH){
56 for(int8_t i=0; i< ACE_PREFIX_LENGTH; i++){
57 if(u_tolower(src[i]) != ACE_PREFIX[i]){
58 startsWithPrefix = FALSE;
61 return startsWithPrefix;
65 toASCIILower(UChar ch){
66 if(CAPITAL_A <= ch && ch <= CAPITAL_Z){
67 return ch + LOWER_CASE_DELTA;
73 compareCaseInsensitiveASCII(const UChar* s1, int32_t s1Len,
74 const UChar* s2, int32_t s2Len){
76 return (s1Len > s2Len) ? s1Len : s2Len;
81 for(int32_t i =0;/* no condition */;i++) {
82 /* If we reach the ends of both strings then they match */
90 /* Case-insensitive comparison */
92 rc=(int32_t)toASCIILower(c1)-(int32_t)toASCIILower(c2);
101 static UErrorCode getError(enum punycode_status status){
103 case punycode_success:
105 case punycode_bad_input: /* Input is invalid. */
106 return U_INVALID_CHAR_FOUND;
107 case punycode_big_output: /* Output would exceed the space provided. */
108 return U_BUFFER_OVERFLOW_ERROR;
109 case punycode_overflow : /* Input requires wider integers to process. */
110 return U_INDEX_OUTOFBOUNDS_ERROR;
112 return U_INTERNAL_PROGRAM_ERROR;
116 static inline int32_t convertASCIIToUChars(const char* src,UChar* dest, int32_t length){
118 for(i=0;i<length;i++){
123 static inline int32_t convertUCharsToASCII(const UChar* src,char* dest, int32_t length){
125 for(i=0;i<length;i++){
126 dest[i] = (char)src[i];
130 // wrapper around the reference Punycode implementation
131 static int32_t convertToPuny(const UChar* src, int32_t srcLength,
132 UChar* dest, int32_t destCapacity,
134 uint32_t b1Stack[MAX_LABEL_BUFFER_SIZE];
135 int32_t b1Len = 0, b1Capacity = MAX_LABEL_BUFFER_SIZE;
136 uint32_t* b1 = b1Stack;
137 char b2Stack[MAX_LABEL_BUFFER_SIZE];
139 int32_t b2Len =MAX_LABEL_BUFFER_SIZE ;
140 punycode_status error;
141 unsigned char* caseFlags = NULL;
143 u_strToUTF32((UChar32*)b1,b1Capacity,&b1Len,src,srcLength,&status);
144 if(status == U_BUFFER_OVERFLOW_ERROR){
145 // redo processing of string
146 /* we do not have enough room so grow the buffer*/
147 b1 = (uint32_t*) uprv_malloc(b1Len * sizeof(uint32_t));
149 status = U_MEMORY_ALLOCATION_ERROR;
153 status = U_ZERO_ERROR; // reset error
155 u_strToUTF32((UChar32*)b1,b1Len,&b1Len,src,srcLength,&status);
157 if(U_FAILURE(status)){
161 //caseFlags = (unsigned char*) uprv_malloc(b1Len *sizeof(unsigned char));
163 error = punycode_encode(b1Len,b1,caseFlags, (uint32_t*)&b2Len, b2);
164 status = getError(error);
166 if(status == U_BUFFER_OVERFLOW_ERROR){
167 /* we do not have enough room so grow the buffer*/
168 b2 = (char*) uprv_malloc( b2Len * sizeof(char));
170 status = U_MEMORY_ALLOCATION_ERROR;
174 status = U_ZERO_ERROR; // reset error
176 punycode_status error = punycode_encode(b1Len,b1,caseFlags, (uint32_t*)&b2Len, b2);
177 status = getError(error);
179 if(U_FAILURE(status)){
183 if(b2Len < destCapacity){
184 convertASCIIToUChars(b2,dest,b2Len);
186 status =U_BUFFER_OVERFLOW_ERROR;
196 uprv_free(caseFlags);
201 static int32_t convertFromPuny( const UChar* src, int32_t srcLength,
202 UChar* dest, int32_t destCapacity,
204 char b1Stack[MAX_LABEL_BUFFER_SIZE];
208 convertUCharsToASCII(src, b1,srcLength);
210 uint32_t b2Stack[MAX_LABEL_BUFFER_SIZE];
211 uint32_t* b2 = b2Stack;
212 int32_t b2Len =MAX_LABEL_BUFFER_SIZE;
213 unsigned char* caseFlags = NULL; //(unsigned char*) uprv_malloc(srcLength * sizeof(unsigned char*));
214 punycode_status error = punycode_decode(srcLength,b1,(uint32_t*)&b2Len,b2,caseFlags);
215 status = getError(error);
216 if(status == U_BUFFER_OVERFLOW_ERROR){
217 b2 = (uint32_t*) uprv_malloc(b2Len * sizeof(uint32_t));
219 status = U_MEMORY_ALLOCATION_ERROR;
222 error = punycode_decode(srcLength,b1,(uint32_t*)&b2Len,b2,caseFlags);
223 status = getError(error);
226 if(U_FAILURE(status)){
230 u_strFromUTF32(dest,destCapacity,&destLen,(UChar32*)b2,b2Len,&status);
239 uprv_free(caseFlags);
245 U_CFUNC int32_t U_EXPORT2
246 idnaref_toASCII(const UChar* src, int32_t srcLength,
247 UChar* dest, int32_t destCapacity,
249 UParseError* parseError,
252 if(status == NULL || U_FAILURE(*status)){
255 if((src == NULL) || (srcLength < -1) || (destCapacity<0) || (!dest && destCapacity > 0)){
256 *status = U_ILLEGAL_ARGUMENT_ERROR;
259 UChar b1Stack[MAX_LABEL_BUFFER_SIZE], b2Stack[MAX_LABEL_BUFFER_SIZE];
260 //initialize pointers to stack buffers
261 UChar *b1 = b1Stack, *b2 = b2Stack;
262 int32_t b1Len=0, b2Len=0,
263 b1Capacity = MAX_LABEL_BUFFER_SIZE,
264 b2Capacity = MAX_LABEL_BUFFER_SIZE ,
268 UBool allowUnassigned = (UBool)((options & IDNAREF_ALLOW_UNASSIGNED) != 0);
269 UBool useSTD3ASCIIRules = (UBool)((options & IDNAREF_USE_STD3_RULES) != 0);
271 UBool* caseFlags = NULL;
273 // assume the source contains all ascii codepoints
274 UBool srcIsASCII = TRUE;
275 // assume the source contains all LDH codepoints
276 UBool srcIsLDH = TRUE;
280 srcLength = u_strlen(src);
284 for( j=0;j<srcLength;j++){
288 b1[b1Len++] = src[j];
291 NamePrepTransform* prep = TestIDNA::getInstance(*status);
292 if(U_FAILURE(*status)){
296 // step 2 is performed only if the source contains non ASCII
298 b1Len = prep->process(src,srcLength,b1, b1Capacity,allowUnassigned,parseError,*status);
300 if(*status == U_BUFFER_OVERFLOW_ERROR){
301 // redo processing of string
302 /* we do not have enough room so grow the buffer*/
303 b1 = (UChar*) uprv_malloc(b1Len * U_SIZEOF_UCHAR);
305 *status = U_MEMORY_ALLOCATION_ERROR;
309 *status = U_ZERO_ERROR; // reset error
311 b1Len = prep->process(src,srcLength,b1, b1Len,allowUnassigned, parseError, *status);
314 if(U_FAILURE(*status)){
320 *status = U_IDNA_ZERO_LENGTH_LABEL_ERROR;
326 for( j=0;j<b1Len;j++){
327 if(b1[j] > 0x7F){// check if output of usprep_prepare is all ASCII
329 }else if(prep->isLDHChar(b1[j])==FALSE){ // if the char is in ASCII range verify that it is an LDH character{
334 if(useSTD3ASCIIRules == TRUE){
336 if( srcIsLDH == FALSE /* source contains some non-LDH characters */
337 || b1[0] == HYPHEN || b1[b1Len-1] == HYPHEN){
338 *status = U_IDNA_STD3_ASCII_RULES_ERROR;
343 if(b1Len <= destCapacity){
344 u_memmove(dest, b1, b1Len);
351 // step 5 : verify the sequence does not begin with ACE prefix
352 if(!startsWithPrefix(b1,b1Len)){
354 //step 6: encode the sequence with punycode
355 //caseFlags = (UBool*) uprv_malloc(b1Len * sizeof(UBool));
357 b2Len = convertToPuny(b1,b1Len, b2,b2Capacity,*status);
358 //b2Len = u_strToPunycode(b2,b2Capacity,b1,b1Len, caseFlags, status);
359 if(*status == U_BUFFER_OVERFLOW_ERROR){
360 // redo processing of string
361 /* we do not have enough room so grow the buffer*/
362 b2 = (UChar*) uprv_malloc(b2Len * U_SIZEOF_UCHAR);
364 *status = U_MEMORY_ALLOCATION_ERROR;
368 *status = U_ZERO_ERROR; // reset error
370 b2Len = convertToPuny(b1, b1Len, b2, b2Len, *status);
371 //b2Len = u_strToPunycode(b2,b2Len,b1,b1Len, caseFlags, status);
375 if(U_FAILURE(*status)){
378 reqLength = b2Len+ACE_PREFIX_LENGTH;
380 if(reqLength > destCapacity){
381 *status = U_BUFFER_OVERFLOW_ERROR;
384 //Step 7: prepend the ACE prefix
385 u_memcpy(dest, ACE_PREFIX, ACE_PREFIX_LENGTH);
386 //Step 6: copy the contents in b2 into dest
387 u_memcpy(dest+ACE_PREFIX_LENGTH, b2, b2Len);
390 *status = U_IDNA_ACE_PREFIX_ERROR;
395 if(reqLength > MAX_LABEL_LENGTH){
396 *status = U_IDNA_LABEL_TOO_LONG_ERROR;
406 uprv_free(caseFlags);
410 return u_terminateUChars(dest, destCapacity, reqLength, status);
414 U_CFUNC int32_t U_EXPORT2
415 idnaref_toUnicode(const UChar* src, int32_t srcLength,
416 UChar* dest, int32_t destCapacity,
418 UParseError* parseError,
421 if(status == NULL || U_FAILURE(*status)){
424 if((src == NULL) || (srcLength < -1) || (destCapacity<0) || (!dest && destCapacity > 0)){
425 *status = U_ILLEGAL_ARGUMENT_ERROR;
431 UChar b1Stack[MAX_LABEL_BUFFER_SIZE], b2Stack[MAX_LABEL_BUFFER_SIZE], b3Stack[MAX_LABEL_BUFFER_SIZE];
433 //initialize pointers to stack buffers
434 UChar *b1 = b1Stack, *b2 = b2Stack, *b1Prime=NULL, *b3=b3Stack;
435 int32_t b1Len, b2Len, b1PrimeLen, b3Len,
436 b1Capacity = MAX_LABEL_BUFFER_SIZE,
437 b2Capacity = MAX_LABEL_BUFFER_SIZE,
438 b3Capacity = MAX_LABEL_BUFFER_SIZE,
440 // UParseError parseError;
442 NamePrepTransform* prep = TestIDNA::getInstance(*status);
444 UBool* caseFlags = NULL;
447 UBool allowUnassigned = (UBool)((options & IDNAREF_ALLOW_UNASSIGNED) != 0);
448 UBool useSTD3ASCIIRules = (UBool)((options & IDNAREF_USE_STD3_RULES) != 0);
450 UBool srcIsASCII = TRUE;
451 UBool srcIsLDH = TRUE;
454 if(U_FAILURE(*status)){
457 // step 1: find out if all the codepoints in src are ASCII
460 for(;src[srcLength]!=0;){
461 if(src[srcLength]> 0x7f){
463 }if(prep->isLDHChar(src[srcLength])==FALSE){
464 // here we do not assemble surrogates
465 // since we know that LDH code points
466 // are in the ASCII range only
473 for(int32_t j=0; j<srcLength; j++){
476 }else if(prep->isLDHChar(src[j])==FALSE){
477 // here we do not assemble surrogates
478 // since we know that LDH code points
479 // are in the ASCII range only
486 if(srcIsASCII == FALSE){
487 // step 2: process the string
488 b1Len = prep->process(src,srcLength,b1,b1Capacity,allowUnassigned, parseError, *status);
489 if(*status == U_BUFFER_OVERFLOW_ERROR){
490 // redo processing of string
491 /* we do not have enough room so grow the buffer*/
492 b1 = (UChar*) uprv_malloc(b1Len * U_SIZEOF_UCHAR);
494 *status = U_MEMORY_ALLOCATION_ERROR;
498 *status = U_ZERO_ERROR; // reset error
500 b1Len = prep->process(src,srcLength,b1, b1Len,allowUnassigned, parseError, *status);
503 if(U_FAILURE(*status)){
508 // copy everything to b1
509 if(srcLength < b1Capacity){
510 u_memmove(b1, src, srcLength);
512 /* we do not have enough room so grow the buffer*/
513 b1 = (UChar*) uprv_malloc(srcLength * U_SIZEOF_UCHAR);
515 *status = U_MEMORY_ALLOCATION_ERROR;
518 u_memmove(b1, src, srcLength);
522 //step 3: verify ACE Prefix
523 if(startsWithPrefix(src,srcLength)){
525 //step 4: Remove the ACE Prefix
526 b1Prime = b1 + ACE_PREFIX_LENGTH;
527 b1PrimeLen = b1Len - ACE_PREFIX_LENGTH;
529 //step 5: Decode using punycode
530 b2Len = convertFromPuny(b1Prime,b1PrimeLen, b2, b2Capacity, *status);
531 //b2Len = u_strFromPunycode(b2, b2Capacity,b1Prime,b1PrimeLen, caseFlags, status);
533 if(*status == U_BUFFER_OVERFLOW_ERROR){
534 // redo processing of string
535 /* we do not have enough room so grow the buffer*/
536 b2 = (UChar*) uprv_malloc(b2Len * U_SIZEOF_UCHAR);
538 *status = U_MEMORY_ALLOCATION_ERROR;
542 *status = U_ZERO_ERROR; // reset error
544 b2Len = convertFromPuny(b1Prime,b1PrimeLen, b2, b2Len, *status);
545 //b2Len = u_strFromPunycode(b2, b2Len,b1Prime,b1PrimeLen,caseFlags, status);
549 //step 6:Apply toASCII
550 b3Len = idnaref_toASCII(b2,b2Len,b3,b3Capacity,options,parseError, status);
552 if(*status == U_BUFFER_OVERFLOW_ERROR){
553 // redo processing of string
554 /* we do not have enough room so grow the buffer*/
555 b3 = (UChar*) uprv_malloc(b3Len * U_SIZEOF_UCHAR);
557 *status = U_MEMORY_ALLOCATION_ERROR;
561 *status = U_ZERO_ERROR; // reset error
563 b3Len = idnaref_toASCII(b2,b2Len,b3,b3Len, options, parseError, status);
567 if(U_FAILURE(*status)){
572 if(compareCaseInsensitiveASCII(b1, b1Len, b3, b3Len) !=0){
573 *status = U_IDNA_VERIFICATION_ERROR;
577 //step 8: return output of step 5
579 if(b2Len <= destCapacity) {
580 u_memmove(dest, b2, b2Len);
583 // verify that STD3 ASCII rules are satisfied
584 if(useSTD3ASCIIRules == TRUE){
585 if( srcIsLDH == FALSE /* source contains some non-LDH characters */
586 || src[0] == HYPHEN || src[srcLength-1] == HYPHEN){
587 *status = U_IDNA_STD3_ASCII_RULES_ERROR;
589 /* populate the parseError struct */
591 // failPos is always set the index of failure
592 uprv_syntaxError(src,failPos, srcLength,parseError);
593 }else if(src[0] == HYPHEN){
594 // fail position is 0
595 uprv_syntaxError(src,0,srcLength,parseError);
597 // the last index in the source is always length-1
598 uprv_syntaxError(src, (srcLength>0) ? srcLength-1 : srcLength, srcLength,parseError);
604 //copy the source to destination
605 if(srcLength <= destCapacity){
606 u_memmove(dest, src, srcLength);
608 reqLength = srcLength;
619 uprv_free(caseFlags);
621 // The RFC states that
623 // ToUnicode never fails. If any step fails, then the original input
624 // is returned immediately in that step.
626 // So if any step fails lets copy source to destination
627 if(U_FAILURE(*status)){
628 //copy the source to destination
629 if(dest && srcLength <= destCapacity){
630 if(srcLength == -1) {
631 u_memmove(dest, src, u_strlen(src));
633 u_memmove(dest, src, srcLength);
636 reqLength = srcLength;
637 *status = U_ZERO_ERROR;
639 return u_terminateUChars(dest, destCapacity, reqLength, status);
644 getNextSeparator(UChar *src,int32_t srcLength,NamePrepTransform* prep,
652 *limit = src + i; // point to null
656 if(prep->isLabelSeparator(src[i],*status)){
657 *limit = src + (i+1); // go past the delimiter
664 for(i=0;i<srcLength;i++){
665 if(prep->isLabelSeparator(src[i],*status)){
666 *limit = src + (i+1); // go past the delimiter
670 // we have not found the delimiter
672 *limit = src+srcLength;
679 U_CFUNC int32_t U_EXPORT2
680 idnaref_IDNToASCII( const UChar* src, int32_t srcLength,
681 UChar* dest, int32_t destCapacity,
683 UParseError* parseError,
686 if(status == NULL || U_FAILURE(*status)){
689 if((src == NULL) || (srcLength < -1) || (destCapacity<0) || (!dest && destCapacity > 0)){
690 *status = U_ILLEGAL_ARGUMENT_ERROR;
694 int32_t reqLength = 0;
695 // UParseError parseError;
697 NamePrepTransform* prep = TestIDNA::getInstance(*status);
699 //initialize pointers to stack buffers
700 UChar b1Stack[MAX_LABEL_BUFFER_SIZE];
702 int32_t b1Len, labelLen;
703 UChar* delimiter = (UChar*)src;
704 UChar* labelStart = (UChar*)src;
705 int32_t remainingLen = srcLength;
706 int32_t b1Capacity = MAX_LABEL_BUFFER_SIZE;
709 // UBool allowUnassigned = (UBool)((options & IDNAREF_ALLOW_UNASSIGNED) != 0);
710 // UBool useSTD3ASCIIRules = (UBool)((options & IDNAREF_USE_STD3_RULES) != 0);
713 if(U_FAILURE(*status)){
725 labelLen = getNextSeparator(labelStart, -1, prep, &delimiter, &done, status);
727 if(!(labelLen==0 && done)){// make sure this is not a root label separator.
729 b1Len = idnaref_toASCII(labelStart, labelLen, b1, b1Capacity,
730 options, parseError, status);
732 if(*status == U_BUFFER_OVERFLOW_ERROR){
733 // redo processing of string
734 /* we do not have enough room so grow the buffer*/
735 b1 = (UChar*) uprv_malloc(b1Len * U_SIZEOF_UCHAR);
737 *status = U_MEMORY_ALLOCATION_ERROR;
741 *status = U_ZERO_ERROR; // reset error
743 b1Len = idnaref_toASCII(labelStart, labelLen, b1, b1Len,
744 options, parseError, status);
749 if(U_FAILURE(*status)){
752 int32_t tempLen = (reqLength + b1Len );
754 if( tempLen< destCapacity){
755 u_memmove(dest+reqLength, b1, b1Len);
760 // add the label separator
762 if(reqLength < destCapacity){
763 dest[reqLength] = FULL_STOP;
768 labelStart = delimiter;
773 if(delimiter == src+srcLength){
777 labelLen = getNextSeparator(labelStart, remainingLen, prep, &delimiter, &done, status);
779 b1Len = idnaref_toASCII(labelStart, labelLen, b1, b1Capacity,
780 options,parseError, status);
782 if(*status == U_BUFFER_OVERFLOW_ERROR){
783 // redo processing of string
784 /* we do not have enough room so grow the buffer*/
785 b1 = (UChar*) uprv_malloc(b1Len * U_SIZEOF_UCHAR);
787 *status = U_MEMORY_ALLOCATION_ERROR;
791 *status = U_ZERO_ERROR; // reset error
793 b1Len = idnaref_toASCII(labelStart, labelLen, b1, b1Len,
794 options, parseError, status);
798 if(U_FAILURE(*status)){
801 int32_t tempLen = (reqLength + b1Len );
803 if( tempLen< destCapacity){
804 u_memmove(dest+reqLength, b1, b1Len);
809 // add the label separator
811 if(reqLength < destCapacity){
812 dest[reqLength] = FULL_STOP;
817 labelStart = delimiter;
818 remainingLen = srcLength - (delimiter - src);
831 return u_terminateUChars(dest, destCapacity, reqLength, status);
834 U_CFUNC int32_t U_EXPORT2
835 idnaref_IDNToUnicode( const UChar* src, int32_t srcLength,
836 UChar* dest, int32_t destCapacity,
838 UParseError* parseError,
841 if(status == NULL || U_FAILURE(*status)){
844 if((src == NULL) || (srcLength < -1) || (destCapacity<0) || (!dest && destCapacity > 0)){
845 *status = U_ILLEGAL_ARGUMENT_ERROR;
849 int32_t reqLength = 0;
853 NamePrepTransform* prep = TestIDNA::getInstance(*status);
855 //initialize pointers to stack buffers
856 UChar b1Stack[MAX_LABEL_BUFFER_SIZE];
858 int32_t b1Len, labelLen;
859 UChar* delimiter = (UChar*)src;
860 UChar* labelStart = (UChar*)src;
861 int32_t remainingLen = srcLength;
862 int32_t b1Capacity = MAX_LABEL_BUFFER_SIZE;
865 // UBool allowUnassigned = (UBool)((options & IDNAREF_ALLOW_UNASSIGNED) != 0);
866 // UBool useSTD3ASCIIRules = (UBool)((options & IDNAREF_USE_STD3_RULES) != 0);
868 if(U_FAILURE(*status)){
879 labelLen = getNextSeparator(labelStart, -1, prep, &delimiter, &done, status);
881 if(labelLen==0 && done==FALSE){
882 *status = U_IDNA_ZERO_LENGTH_LABEL_ERROR;
884 b1Len = idnaref_toUnicode(labelStart, labelLen, b1, b1Capacity,
885 options, parseError, status);
887 if(*status == U_BUFFER_OVERFLOW_ERROR){
888 // redo processing of string
889 /* we do not have enough room so grow the buffer*/
890 b1 = (UChar*) uprv_malloc(b1Len * U_SIZEOF_UCHAR);
892 *status = U_MEMORY_ALLOCATION_ERROR;
896 *status = U_ZERO_ERROR; // reset error
898 b1Len = idnaref_toUnicode( labelStart, labelLen, b1, b1Len,
899 options, parseError, status);
903 if(U_FAILURE(*status)){
906 int32_t tempLen = (reqLength + b1Len );
908 if( tempLen< destCapacity){
909 u_memmove(dest+reqLength, b1, b1Len);
913 // add the label separator
915 if(reqLength < destCapacity){
916 dest[reqLength] = FULL_STOP;
921 labelStart = delimiter;
926 if(delimiter == src+srcLength){
930 labelLen = getNextSeparator(labelStart, remainingLen, prep, &delimiter, &done, status);
932 if(labelLen==0 && done==FALSE){
933 *status = U_IDNA_ZERO_LENGTH_LABEL_ERROR;
936 b1Len = idnaref_toUnicode( labelStart,labelLen, b1, b1Capacity,
937 options, parseError, status);
939 if(*status == U_BUFFER_OVERFLOW_ERROR){
940 // redo processing of string
941 /* we do not have enough room so grow the buffer*/
942 b1 = (UChar*) uprv_malloc(b1Len * U_SIZEOF_UCHAR);
944 *status = U_MEMORY_ALLOCATION_ERROR;
948 *status = U_ZERO_ERROR; // reset error
950 b1Len = idnaref_toUnicode( labelStart, labelLen, b1, b1Len,
951 options, parseError, status);
955 if(U_FAILURE(*status)){
958 int32_t tempLen = (reqLength + b1Len );
960 if( tempLen< destCapacity){
961 u_memmove(dest+reqLength, b1, b1Len);
966 // add the label separator
968 if(reqLength < destCapacity){
969 dest[reqLength] = FULL_STOP;
974 labelStart = delimiter;
975 remainingLen = srcLength - (delimiter - src);
987 return u_terminateUChars(dest, destCapacity, reqLength, status);
990 U_CFUNC int32_t U_EXPORT2
991 idnaref_compare( const UChar *s1, int32_t length1,
992 const UChar *s2, int32_t length2,
996 if(status == NULL || U_FAILURE(*status)){
1000 UChar b1Stack[MAX_IDN_BUFFER_SIZE], b2Stack[MAX_IDN_BUFFER_SIZE];
1001 UChar *b1 = b1Stack, *b2 = b2Stack;
1002 int32_t b1Len, b2Len, b1Capacity = MAX_IDN_BUFFER_SIZE, b2Capacity = MAX_IDN_BUFFER_SIZE;
1003 int32_t result = -1;
1005 UParseError parseError;
1007 b1Len = idnaref_IDNToASCII(s1, length1, b1, b1Capacity, options, &parseError, status);
1008 if(*status == U_BUFFER_OVERFLOW_ERROR){
1009 // redo processing of string
1010 /* we do not have enough room so grow the buffer*/
1011 b1 = (UChar*) uprv_malloc(b1Len * U_SIZEOF_UCHAR);
1013 *status = U_MEMORY_ALLOCATION_ERROR;
1017 *status = U_ZERO_ERROR; // reset error
1019 b1Len = idnaref_IDNToASCII(s1,length1,b1,b1Len, options, &parseError, status);
1023 b2Len = idnaref_IDNToASCII(s2,length2,b2,b2Capacity,options, &parseError, status);
1024 if(*status == U_BUFFER_OVERFLOW_ERROR){
1025 // redo processing of string
1026 /* we do not have enough room so grow the buffer*/
1027 b2 = (UChar*) uprv_malloc(b2Len * U_SIZEOF_UCHAR);
1029 *status = U_MEMORY_ALLOCATION_ERROR;
1033 *status = U_ZERO_ERROR; // reset error
1035 b2Len = idnaref_IDNToASCII(s2,length2,b2,b2Len,options, &parseError, status);
1038 // when toASCII is applied all label separators are replaced with FULL_STOP
1039 result = compareCaseInsensitiveASCII(b1,b1Len,b2,b2Len);
1052 #endif /* #if !UCONFIG_NO_IDNA */