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-rw-r--r--intl/icu/source/common/uidna.cpp921
1 files changed, 921 insertions, 0 deletions
diff --git a/intl/icu/source/common/uidna.cpp b/intl/icu/source/common/uidna.cpp
new file mode 100644
index 0000000..b7780b8
--- /dev/null
+++ b/intl/icu/source/common/uidna.cpp
@@ -0,0 +1,921 @@
+/*
+ *******************************************************************************
+ *
+ * Copyright (C) 2003-2009, International Business Machines
+ * Corporation and others. All Rights Reserved.
+ *
+ *******************************************************************************
+ * file name: uidna.cpp
+ * encoding: US-ASCII
+ * tab size: 8 (not used)
+ * indentation:4
+ *
+ * created on: 2003feb1
+ * created by: Ram Viswanadha
+ */
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_IDNA
+
+#include "unicode/uidna.h"
+#include "unicode/ustring.h"
+#include "unicode/usprep.h"
+#include "punycode.h"
+#include "ustr_imp.h"
+#include "cmemory.h"
+#include "uassert.h"
+#include "sprpimpl.h"
+
+/* it is official IDNA ACE Prefix is "xn--" */
+static const UChar ACE_PREFIX[] ={ 0x0078,0x006E,0x002d,0x002d } ;
+#define ACE_PREFIX_LENGTH 4
+
+#define MAX_LABEL_LENGTH 63
+/* The Max length of the labels should not be more than MAX_LABEL_LENGTH */
+#define MAX_LABEL_BUFFER_SIZE 100
+
+#define MAX_DOMAIN_NAME_LENGTH 255
+/* The Max length of the domain names should not be more than MAX_DOMAIN_NAME_LENGTH */
+#define MAX_IDN_BUFFER_SIZE MAX_DOMAIN_NAME_LENGTH+1
+
+#define LOWER_CASE_DELTA 0x0020
+#define HYPHEN 0x002D
+#define FULL_STOP 0x002E
+#define CAPITAL_A 0x0041
+#define CAPITAL_Z 0x005A
+
+inline static UChar
+toASCIILower(UChar ch){
+ if(CAPITAL_A <= ch && ch <= CAPITAL_Z){
+ return ch + LOWER_CASE_DELTA;
+ }
+ return ch;
+}
+
+inline static UBool
+startsWithPrefix(const UChar* src , int32_t srcLength){
+ UBool startsWithPrefix = TRUE;
+
+ if(srcLength < ACE_PREFIX_LENGTH){
+ return FALSE;
+ }
+
+ for(int8_t i=0; i< ACE_PREFIX_LENGTH; i++){
+ if(toASCIILower(src[i]) != ACE_PREFIX[i]){
+ startsWithPrefix = FALSE;
+ }
+ }
+ return startsWithPrefix;
+}
+
+
+inline static int32_t
+compareCaseInsensitiveASCII(const UChar* s1, int32_t s1Len,
+ const UChar* s2, int32_t s2Len){
+
+ int32_t minLength;
+ int32_t lengthResult;
+
+ // are we comparing different lengths?
+ if(s1Len != s2Len) {
+ if(s1Len < s2Len) {
+ minLength = s1Len;
+ lengthResult = -1;
+ } else {
+ minLength = s2Len;
+ lengthResult = 1;
+ }
+ } else {
+ // ok the lengths are equal
+ minLength = s1Len;
+ lengthResult = 0;
+ }
+
+ UChar c1,c2;
+ int32_t rc;
+
+ for(int32_t i =0;/* no condition */;i++) {
+
+ /* If we reach the ends of both strings then they match */
+ if(i == minLength) {
+ return lengthResult;
+ }
+
+ c1 = s1[i];
+ c2 = s2[i];
+
+ /* Case-insensitive comparison */
+ if(c1!=c2) {
+ rc=(int32_t)toASCIILower(c1)-(int32_t)toASCIILower(c2);
+ if(rc!=0) {
+ lengthResult=rc;
+ break;
+ }
+ }
+ }
+ return lengthResult;
+}
+
+
+/**
+ * Ascertain if the given code point is a label separator as
+ * defined by the IDNA RFC
+ *
+ * @param ch The code point to be ascertained
+ * @return true if the char is a label separator
+ * @stable ICU 2.8
+ */
+static inline UBool isLabelSeparator(UChar ch){
+ switch(ch){
+ case 0x002e:
+ case 0x3002:
+ case 0xFF0E:
+ case 0xFF61:
+ return TRUE;
+ default:
+ return FALSE;
+ }
+}
+
+// returns the length of the label excluding the separator
+// if *limit == separator then the length returned does not include
+// the separtor.
+static inline int32_t
+getNextSeparator(UChar *src, int32_t srcLength,
+ UChar **limit, UBool *done){
+ if(srcLength == -1){
+ int32_t i;
+ for(i=0 ; ;i++){
+ if(src[i] == 0){
+ *limit = src + i; // point to null
+ *done = TRUE;
+ return i;
+ }
+ if(isLabelSeparator(src[i])){
+ *limit = src + (i+1); // go past the delimiter
+ return i;
+
+ }
+ }
+ }else{
+ int32_t i;
+ for(i=0;i<srcLength;i++){
+ if(isLabelSeparator(src[i])){
+ *limit = src + (i+1); // go past the delimiter
+ return i;
+ }
+ }
+ // we have not found the delimiter
+ // if(i==srcLength)
+ *limit = src+srcLength;
+ *done = TRUE;
+
+ return i;
+ }
+}
+static inline UBool isLDHChar(UChar ch){
+ // high runner case
+ if(ch>0x007A){
+ return FALSE;
+ }
+ //[\\u002D \\u0030-\\u0039 \\u0041-\\u005A \\u0061-\\u007A]
+ if( (ch==0x002D) ||
+ (0x0030 <= ch && ch <= 0x0039) ||
+ (0x0041 <= ch && ch <= 0x005A) ||
+ (0x0061 <= ch && ch <= 0x007A)
+ ){
+ return TRUE;
+ }
+ return FALSE;
+}
+
+static int32_t
+_internal_toASCII(const UChar* src, int32_t srcLength,
+ UChar* dest, int32_t destCapacity,
+ int32_t options,
+ UStringPrepProfile* nameprep,
+ UParseError* parseError,
+ UErrorCode* status)
+{
+
+ // TODO Revisit buffer handling. The label should not be over 63 ASCII characters. ICU4J may need to be updated too.
+ UChar b1Stack[MAX_LABEL_BUFFER_SIZE], b2Stack[MAX_LABEL_BUFFER_SIZE];
+ //initialize pointers to stack buffers
+ UChar *b1 = b1Stack, *b2 = b2Stack;
+ int32_t b1Len=0, b2Len,
+ b1Capacity = MAX_LABEL_BUFFER_SIZE,
+ b2Capacity = MAX_LABEL_BUFFER_SIZE ,
+ reqLength=0;
+
+ int32_t namePrepOptions = ((options & UIDNA_ALLOW_UNASSIGNED) != 0) ? USPREP_ALLOW_UNASSIGNED: 0;
+ UBool* caseFlags = NULL;
+
+ // the source contains all ascii codepoints
+ UBool srcIsASCII = TRUE;
+ // assume the source contains all LDH codepoints
+ UBool srcIsLDH = TRUE;
+
+ int32_t j=0;
+
+ //get the options
+ UBool useSTD3ASCIIRules = (UBool)((options & UIDNA_USE_STD3_RULES) != 0);
+
+ int32_t failPos = -1;
+
+ if(srcLength == -1){
+ srcLength = u_strlen(src);
+ }
+
+ if(srcLength > b1Capacity){
+ b1 = (UChar*) uprv_malloc(srcLength * U_SIZEOF_UCHAR);
+ if(b1==NULL){
+ *status = U_MEMORY_ALLOCATION_ERROR;
+ goto CLEANUP;
+ }
+ b1Capacity = srcLength;
+ }
+
+ // step 1
+ for( j=0;j<srcLength;j++){
+ if(src[j] > 0x7F){
+ srcIsASCII = FALSE;
+ }
+ b1[b1Len++] = src[j];
+ }
+
+ // step 2 is performed only if the source contains non ASCII
+ if(srcIsASCII == FALSE){
+
+ // step 2
+ b1Len = usprep_prepare(nameprep, src, srcLength, b1, b1Capacity, namePrepOptions, parseError, status);
+
+ if(*status == U_BUFFER_OVERFLOW_ERROR){
+ // redo processing of string
+ // we do not have enough room so grow the buffer
+ if(b1 != b1Stack){
+ uprv_free(b1);
+ }
+ 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_prepare(nameprep, src, srcLength, b1, b1Len, namePrepOptions, parseError, status);
+ }
+ }
+ // error bail out
+ if(U_FAILURE(*status)){
+ goto CLEANUP;
+ }
+ if(b1Len == 0){
+ *status = U_IDNA_ZERO_LENGTH_LABEL_ERROR;
+ goto CLEANUP;
+ }
+
+ // for step 3 & 4
+ srcIsASCII = TRUE;
+ for( j=0;j<b1Len;j++){
+ // check if output of usprep_prepare is all ASCII
+ if(b1[j] > 0x7F){
+ srcIsASCII = FALSE;
+ }else if(isLDHChar(b1[j])==FALSE){ // if the char is in ASCII range verify that it is an LDH character
+ srcIsLDH = FALSE;
+ failPos = j;
+ }
+ }
+ if(useSTD3ASCIIRules == TRUE){
+ // verify 3a and 3b
+ // 3(a) Verify the absence of non-LDH ASCII code points; that is, the
+ // absence of 0..2C, 2E..2F, 3A..40, 5B..60, and 7B..7F.
+ // 3(b) Verify the absence of leading and trailing hyphen-minus; that
+ // is, the absence of U+002D at the beginning and end of the
+ // sequence.
+ if( srcIsLDH == FALSE /* source at this point should not contain anyLDH characters */
+ || b1[0] == HYPHEN || b1[b1Len-1] == HYPHEN){
+ *status = U_IDNA_STD3_ASCII_RULES_ERROR;
+
+ /* populate the parseError struct */
+ if(srcIsLDH==FALSE){
+ // failPos is always set the index of failure
+ uprv_syntaxError(b1,failPos, b1Len,parseError);
+ }else if(b1[0] == HYPHEN){
+ // fail position is 0
+ uprv_syntaxError(b1,0,b1Len,parseError);
+ }else{
+ // the last index in the source is always length-1
+ uprv_syntaxError(b1, (b1Len>0) ? b1Len-1 : b1Len, b1Len,parseError);
+ }
+
+ goto CLEANUP;
+ }
+ }
+ // Step 4: if the source is ASCII then proceed to step 8
+ if(srcIsASCII){
+ if(b1Len <= destCapacity){
+ uprv_memmove(dest, b1, b1Len * U_SIZEOF_UCHAR);
+ reqLength = b1Len;
+ }else{
+ reqLength = b1Len;
+ goto CLEANUP;
+ }
+ }else{
+ // step 5 : verify the sequence does not begin with ACE prefix
+ if(!startsWithPrefix(b1,b1Len)){
+
+ //step 6: encode the sequence with punycode
+
+ // do not preserve the case flags for now!
+ // TODO: Preserve the case while implementing the RFE
+ // caseFlags = (UBool*) uprv_malloc(b1Len * sizeof(UBool));
+ // uprv_memset(caseFlags,TRUE,b1Len);
+
+ b2Len = u_strToPunycode(b1,b1Len,b2,b2Capacity,caseFlags, 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 = u_strToPunycode(b1,b1Len,b2,b2Len,caseFlags, status);
+ }
+ //error bail out
+ if(U_FAILURE(*status)){
+ goto CLEANUP;
+ }
+ // TODO : Reconsider while implementing the case preserve RFE
+ // convert all codepoints to lower case ASCII
+ // toASCIILower(b2,b2Len);
+ reqLength = b2Len+ACE_PREFIX_LENGTH;
+
+ if(reqLength > destCapacity){
+ *status = U_BUFFER_OVERFLOW_ERROR;
+ goto CLEANUP;
+ }
+ //Step 7: prepend the ACE prefix
+ uprv_memcpy(dest,ACE_PREFIX,ACE_PREFIX_LENGTH * U_SIZEOF_UCHAR);
+ //Step 6: copy the contents in b2 into dest
+ uprv_memcpy(dest+ACE_PREFIX_LENGTH, b2, b2Len * U_SIZEOF_UCHAR);
+
+ }else{
+ *status = U_IDNA_ACE_PREFIX_ERROR;
+ //position of failure is 0
+ uprv_syntaxError(b1,0,b1Len,parseError);
+ goto CLEANUP;
+ }
+ }
+ // step 8: verify the length of label
+ if(reqLength > MAX_LABEL_LENGTH){
+ *status = U_IDNA_LABEL_TOO_LONG_ERROR;
+ }
+
+CLEANUP:
+ if(b1 != b1Stack){
+ uprv_free(b1);
+ }
+ if(b2 != b2Stack){
+ uprv_free(b2);
+ }
+ uprv_free(caseFlags);
+
+ return u_terminateUChars(dest, destCapacity, reqLength, status);
+}
+
+static int32_t
+_internal_toUnicode(const UChar* src, int32_t srcLength,
+ UChar* dest, int32_t destCapacity,
+ int32_t options,
+ UStringPrepProfile* nameprep,
+ UParseError* parseError,
+ UErrorCode* status)
+{
+
+ //get the options
+ //UBool useSTD3ASCIIRules = (UBool)((options & UIDNA_USE_STD3_RULES) != 0);
+ int32_t namePrepOptions = ((options & UIDNA_ALLOW_UNASSIGNED) != 0) ? USPREP_ALLOW_UNASSIGNED: 0;
+
+ // TODO Revisit buffer handling. The label should not be over 63 ASCII characters. ICU4J may need to be updated too.
+ UChar b1Stack[MAX_LABEL_BUFFER_SIZE], b2Stack[MAX_LABEL_BUFFER_SIZE], b3Stack[MAX_LABEL_BUFFER_SIZE];
+
+ //initialize pointers to stack buffers
+ UChar *b1 = b1Stack, *b2 = b2Stack, *b1Prime=NULL, *b3=b3Stack;
+ int32_t b1Len, b2Len, b1PrimeLen, b3Len,
+ b1Capacity = MAX_LABEL_BUFFER_SIZE,
+ b2Capacity = MAX_LABEL_BUFFER_SIZE,
+ b3Capacity = MAX_LABEL_BUFFER_SIZE,
+ reqLength=0;
+
+ b1Len = 0;
+ UBool* caseFlags = NULL;
+
+ UBool srcIsASCII = TRUE;
+ /*UBool srcIsLDH = TRUE;
+ int32_t failPos =0;*/
+
+ // step 1: find out if all the codepoints in src are ASCII
+ if(srcLength==-1){
+ srcLength = 0;
+ for(;src[srcLength]!=0;){
+ if(src[srcLength]> 0x7f){
+ srcIsASCII = FALSE;
+ }/*else if(isLDHChar(src[srcLength])==FALSE){
+ // here we do not assemble surrogates
+ // since we know that LDH code points
+ // are in the ASCII range only
+ srcIsLDH = FALSE;
+ failPos = srcLength;
+ }*/
+ srcLength++;
+ }
+ }else if(srcLength > 0){
+ for(int32_t j=0; j<srcLength; j++){
+ if(src[j]> 0x7f){
+ srcIsASCII = FALSE;
+ }/*else if(isLDHChar(src[j])==FALSE){
+ // here we do not assemble surrogates
+ // since we know that LDH code points
+ // are in the ASCII range only
+ srcIsLDH = FALSE;
+ failPos = j;
+ }*/
+ }
+ }else{
+ return 0;
+ }
+
+ if(srcIsASCII == FALSE){
+ // step 2: process the string
+ b1Len = usprep_prepare(nameprep, src, srcLength, b1, b1Capacity, namePrepOptions, 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_prepare(nameprep, src, srcLength, b1, b1Len, namePrepOptions, parseError, status);
+ }
+ //bail out on error
+ if(U_FAILURE(*status)){
+ goto CLEANUP;
+ }
+ }else{
+
+ //just point src to b1
+ b1 = (UChar*) src;
+ b1Len = srcLength;
+ }
+
+ // The RFC states that
+ // <quote>
+ // ToUnicode never fails. If any step fails, then the original input
+ // is returned immediately in that step.
+ // </quote>
+
+ //step 3: verify ACE Prefix
+ if(startsWithPrefix(b1,b1Len)){
+
+ //step 4: Remove the ACE Prefix
+ b1Prime = b1 + ACE_PREFIX_LENGTH;
+ b1PrimeLen = b1Len - ACE_PREFIX_LENGTH;
+
+ //step 5: Decode using punycode
+ b2Len = u_strFromPunycode(b1Prime, b1PrimeLen, b2, b2Capacity, caseFlags,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 = u_strFromPunycode(b1Prime, b1PrimeLen, b2, b2Len, caseFlags, status);
+ }
+
+
+ //step 6:Apply toASCII
+ b3Len = uidna_toASCII(b2, b2Len, b3, b3Capacity, options, parseError, status);
+
+ if(*status == U_BUFFER_OVERFLOW_ERROR){
+ // redo processing of string
+ /* we do not have enough room so grow the buffer*/
+ b3 = (UChar*) uprv_malloc(b3Len * U_SIZEOF_UCHAR);
+ if(b3==NULL){
+ *status = U_MEMORY_ALLOCATION_ERROR;
+ goto CLEANUP;
+ }
+
+ *status = U_ZERO_ERROR; // reset error
+
+ b3Len = uidna_toASCII(b2,b2Len,b3,b3Len,options,parseError, status);
+
+ }
+ //bail out on error
+ if(U_FAILURE(*status)){
+ goto CLEANUP;
+ }
+
+ //step 7: verify
+ if(compareCaseInsensitiveASCII(b1, b1Len, b3, b3Len) !=0){
+ // Cause the original to be returned.
+ *status = U_IDNA_VERIFICATION_ERROR;
+ goto CLEANUP;
+ }
+
+ //step 8: return output of step 5
+ reqLength = b2Len;
+ if(b2Len <= destCapacity) {
+ uprv_memmove(dest, b2, b2Len * U_SIZEOF_UCHAR);
+ }
+ }
+ else{
+ // See the start of this if statement for why this is commented out.
+ // verify that STD3 ASCII rules are satisfied
+ /*if(useSTD3ASCIIRules == TRUE){
+ if( srcIsLDH == FALSE // source contains some non-LDH characters
+ || src[0] == HYPHEN || src[srcLength-1] == HYPHEN){
+ *status = U_IDNA_STD3_ASCII_RULES_ERROR;
+
+ // populate the parseError struct
+ if(srcIsLDH==FALSE){
+ // failPos is always set the index of failure
+ uprv_syntaxError(src,failPos, srcLength,parseError);
+ }else if(src[0] == HYPHEN){
+ // fail position is 0
+ uprv_syntaxError(src,0,srcLength,parseError);
+ }else{
+ // the last index in the source is always length-1
+ uprv_syntaxError(src, (srcLength>0) ? srcLength-1 : srcLength, srcLength,parseError);
+ }
+
+ goto CLEANUP;
+ }
+ }*/
+ // just return the source
+ //copy the source to destination
+ if(srcLength <= destCapacity){
+ uprv_memmove(dest,src,srcLength * U_SIZEOF_UCHAR);
+ }
+ reqLength = srcLength;
+ }
+
+
+CLEANUP:
+
+ if(b1 != b1Stack && b1!=src){
+ uprv_free(b1);
+ }
+ if(b2 != b2Stack){
+ uprv_free(b2);
+ }
+ uprv_free(caseFlags);
+
+ // The RFC states that
+ // <quote>
+ // ToUnicode never fails. If any step fails, then the original input
+ // is returned immediately in that step.
+ // </quote>
+ // So if any step fails lets copy source to destination
+ if(U_FAILURE(*status)){
+ //copy the source to destination
+ if(dest && srcLength <= destCapacity){
+ // srcLength should have already been set earlier.
+ U_ASSERT(srcLength >= 0);
+ uprv_memmove(dest,src,srcLength * U_SIZEOF_UCHAR);
+ }
+ reqLength = srcLength;
+ *status = U_ZERO_ERROR;
+ }
+
+ return u_terminateUChars(dest, destCapacity, reqLength, status);
+}
+
+U_CAPI int32_t U_EXPORT2
+uidna_toASCII(const UChar* src, int32_t srcLength,
+ UChar* dest, int32_t destCapacity,
+ int32_t options,
+ UParseError* parseError,
+ UErrorCode* status){
+
+ if(status == NULL || U_FAILURE(*status)){
+ return 0;
+ }
+ if((src==NULL) || (srcLength < -1) || (destCapacity<0) || (!dest && destCapacity > 0)){
+ *status = U_ILLEGAL_ARGUMENT_ERROR;
+ return 0;
+ }
+
+ UStringPrepProfile* nameprep = usprep_openByType(USPREP_RFC3491_NAMEPREP, status);
+
+ if(U_FAILURE(*status)){
+ return -1;
+ }
+
+ int32_t retLen = _internal_toASCII(src, srcLength, dest, destCapacity, options, nameprep, parseError, status);
+
+ /* close the profile*/
+ usprep_close(nameprep);
+
+ return retLen;
+}
+
+U_CAPI int32_t U_EXPORT2
+uidna_toUnicode(const UChar* src, int32_t srcLength,
+ UChar* dest, int32_t destCapacity,
+ int32_t options,
+ UParseError* parseError,
+ UErrorCode* status){
+
+ if(status == NULL || U_FAILURE(*status)){
+ return 0;
+ }
+ if( (src==NULL) || (srcLength < -1) || (destCapacity<0) || (!dest && destCapacity > 0)){
+ *status = U_ILLEGAL_ARGUMENT_ERROR;
+ return 0;
+ }
+
+ UStringPrepProfile* nameprep = usprep_openByType(USPREP_RFC3491_NAMEPREP, status);
+
+ if(U_FAILURE(*status)){
+ return -1;
+ }
+
+ int32_t retLen = _internal_toUnicode(src, srcLength, dest, destCapacity, options, nameprep, parseError, status);
+
+ usprep_close(nameprep);
+
+ return retLen;
+}
+
+
+U_CAPI int32_t U_EXPORT2
+uidna_IDNToASCII( const UChar *src, int32_t srcLength,
+ UChar* dest, int32_t destCapacity,
+ int32_t options,
+ UParseError *parseError,
+ UErrorCode *status){
+
+ if(status == NULL || U_FAILURE(*status)){
+ return 0;
+ }
+ if((src==NULL) || (srcLength < -1) || (destCapacity<0) || (!dest && destCapacity > 0)){
+ *status = U_ILLEGAL_ARGUMENT_ERROR;
+ return 0;
+ }
+
+ int32_t reqLength = 0;
+
+ UStringPrepProfile* nameprep = usprep_openByType(USPREP_RFC3491_NAMEPREP, status);
+
+ if(U_FAILURE(*status)){
+ return 0;
+ }
+
+ //initialize pointers
+ UChar *delimiter = (UChar*)src;
+ UChar *labelStart = (UChar*)src;
+ UChar *currentDest = (UChar*) dest;
+ int32_t remainingLen = srcLength;
+ int32_t remainingDestCapacity = destCapacity;
+ int32_t labelLen = 0, labelReqLength = 0;
+ UBool done = FALSE;
+
+
+ for(;;){
+
+ labelLen = getNextSeparator(labelStart,remainingLen, &delimiter,&done);
+ labelReqLength = 0;
+ if(!(labelLen==0 && done)){// make sure this is not a root label separator.
+
+ labelReqLength = _internal_toASCII( labelStart, labelLen,
+ currentDest, remainingDestCapacity,
+ options, nameprep,
+ parseError, status);
+
+ if(*status == U_BUFFER_OVERFLOW_ERROR){
+
+ *status = U_ZERO_ERROR; // reset error
+ remainingDestCapacity = 0;
+ }
+ }
+
+
+ if(U_FAILURE(*status)){
+ break;
+ }
+
+ reqLength +=labelReqLength;
+ // adjust the destination pointer
+ if(labelReqLength < remainingDestCapacity){
+ currentDest = currentDest + labelReqLength;
+ remainingDestCapacity -= labelReqLength;
+ }else{
+ // should never occur
+ remainingDestCapacity = 0;
+ }
+
+ if(done == TRUE){
+ break;
+ }
+
+ // add the label separator
+ if(remainingDestCapacity > 0){
+ *currentDest++ = FULL_STOP;
+ remainingDestCapacity--;
+ }
+ reqLength++;
+
+ labelStart = delimiter;
+ if(remainingLen >0 ){
+ remainingLen = (int32_t)(srcLength - (delimiter - src));
+ }
+
+ }
+
+ if(reqLength > MAX_DOMAIN_NAME_LENGTH){
+ *status = U_IDNA_DOMAIN_NAME_TOO_LONG_ERROR;
+ }
+
+ usprep_close(nameprep);
+
+ return u_terminateUChars(dest, destCapacity, reqLength, status);
+}
+
+U_CAPI int32_t U_EXPORT2
+uidna_IDNToUnicode( const UChar* src, int32_t srcLength,
+ UChar* dest, int32_t destCapacity,
+ int32_t options,
+ UParseError* parseError,
+ UErrorCode* status){
+
+ if(status == NULL || U_FAILURE(*status)){
+ return 0;
+ }
+ if((src==NULL) || (srcLength < -1) || (destCapacity<0) || (!dest && destCapacity > 0)){
+ *status = U_ILLEGAL_ARGUMENT_ERROR;
+ return 0;
+ }
+
+ int32_t reqLength = 0;
+
+ UStringPrepProfile* nameprep = usprep_openByType(USPREP_RFC3491_NAMEPREP, status);
+
+ if(U_FAILURE(*status)){
+ return 0;
+ }
+
+ //initialize pointers
+ UChar *delimiter = (UChar*)src;
+ UChar *labelStart = (UChar*)src;
+ UChar *currentDest = (UChar*) dest;
+ int32_t remainingLen = srcLength;
+ int32_t remainingDestCapacity = destCapacity;
+ int32_t labelLen = 0, labelReqLength = 0;
+ UBool done = FALSE;
+
+ for(;;){
+
+ labelLen = getNextSeparator(labelStart,remainingLen, &delimiter,&done);
+
+ // The RFC states that
+ // <quote>
+ // ToUnicode never fails. If any step fails, then the original input
+ // is returned immediately in that step.
+ // </quote>
+ // _internal_toUnicode will copy the label.
+ /*if(labelLen==0 && done==FALSE){
+ *status = U_IDNA_ZERO_LENGTH_LABEL_ERROR;
+ break;
+ }*/
+
+ labelReqLength = _internal_toUnicode(labelStart, labelLen,
+ currentDest, remainingDestCapacity,
+ options, nameprep,
+ parseError, status);
+
+ if(*status == U_BUFFER_OVERFLOW_ERROR){
+ *status = U_ZERO_ERROR; // reset error
+ remainingDestCapacity = 0;
+ }
+
+ if(U_FAILURE(*status)){
+ break;
+ }
+
+ reqLength +=labelReqLength;
+ // adjust the destination pointer
+ if(labelReqLength < remainingDestCapacity){
+ currentDest = currentDest + labelReqLength;
+ remainingDestCapacity -= labelReqLength;
+ }else{
+ // should never occur
+ remainingDestCapacity = 0;
+ }
+
+ if(done == TRUE){
+ break;
+ }
+
+ // add the label separator
+ // Unlike the ToASCII operation we don't normalize the label separators
+ if(remainingDestCapacity > 0){
+ *currentDest++ = *(labelStart + labelLen);
+ remainingDestCapacity--;
+ }
+ reqLength++;
+
+ labelStart = delimiter;
+ if(remainingLen >0 ){
+ remainingLen = (int32_t)(srcLength - (delimiter - src));
+ }
+
+ }
+
+ if(reqLength > MAX_DOMAIN_NAME_LENGTH){
+ *status = U_IDNA_DOMAIN_NAME_TOO_LONG_ERROR;
+ }
+
+ usprep_close(nameprep);
+
+ return u_terminateUChars(dest, destCapacity, reqLength, status);
+}
+
+U_CAPI int32_t U_EXPORT2
+uidna_compare( const UChar *s1, int32_t length1,
+ const UChar *s2, int32_t length2,
+ int32_t options,
+ UErrorCode* status){
+
+ if(status == NULL || U_FAILURE(*status)){
+ return -1;
+ }
+
+ UChar b1Stack[MAX_IDN_BUFFER_SIZE], b2Stack[MAX_IDN_BUFFER_SIZE];
+ UChar *b1 = b1Stack, *b2 = b2Stack;
+ int32_t b1Len, b2Len, b1Capacity = MAX_IDN_BUFFER_SIZE, b2Capacity = MAX_IDN_BUFFER_SIZE;
+ int32_t result=-1;
+
+ UParseError parseError;
+
+ b1Len = uidna_IDNToASCII(s1, length1, b1, b1Capacity, options, &parseError, status);
+ if(*status == U_BUFFER_OVERFLOW_ERROR){
+ // redo processing of string
+ 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 = uidna_IDNToASCII(s1,length1,b1,b1Len, options, &parseError, status);
+
+ }
+
+ b2Len = uidna_IDNToASCII(s2,length2, b2,b2Capacity, options, &parseError, status);
+ if(*status == U_BUFFER_OVERFLOW_ERROR){
+ // redo processing of string
+ 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 = uidna_IDNToASCII(s2, length2, b2, b2Len, options, &parseError, status);
+
+ }
+ // when toASCII is applied all label separators are replaced with FULL_STOP
+ result = compareCaseInsensitiveASCII(b1,b1Len,b2,b2Len);
+
+CLEANUP:
+ if(b1 != b1Stack){
+ uprv_free(b1);
+ }
+
+ if(b2 != b2Stack){
+ uprv_free(b2);
+ }
+
+ return result;
+}
+
+#endif /* #if !UCONFIG_NO_IDNA */
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