| /* |
| ******************************************************************************* |
| * |
| * 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 */ |
