| /* | |
| ******************************************************************************* | |
| * Copyright (C) 2010, International Business Machines | |
| * Corporation and others. All Rights Reserved. | |
| ******************************************************************************* | |
| * file name: uts46.cpp | |
| * encoding: US-ASCII | |
| * tab size: 8 (not used) | |
| * indentation:4 | |
| * | |
| * created on: 2010mar09 | |
| * created by: Markus W. Scherer | |
| */ | |
| #include "unicode/utypes.h" | |
| #if !UCONFIG_NO_IDNA | |
| #include "unicode/idna.h" | |
| #include "unicode/normalizer2.h" | |
| #include "unicode/ustring.h" | |
| #include "cmemory.h" | |
| #include "cstring.h" | |
| #include "punycode.h" | |
| #include "ustr_imp.h" | |
| #define LENGTHOF(array) (int32_t)(sizeof(array)/sizeof((array)[0])) | |
| // Note about tests for UIDNA_ERROR_DOMAIN_NAME_TOO_LONG: | |
| // | |
| // The domain name length limit is 255 octets in an internal DNS representation | |
| // where the last ("root") label is the empty label | |
| // represented by length byte 0 alone. | |
| // In a conventional string, this translates to 253 characters, or 254 | |
| // if there is a trailing dot for the root label. | |
| U_NAMESPACE_BEGIN | |
| // Severe errors which usually result in a U+FFFD replacement character in the result string. | |
| const uint32_t severeErrors= | |
| UIDNA_ERROR_LEADING_COMBINING_MARK| | |
| UIDNA_ERROR_DISALLOWED| | |
| UIDNA_ERROR_PUNYCODE| | |
| UIDNA_ERROR_LABEL_HAS_DOT| | |
| UIDNA_ERROR_INVALID_ACE_LABEL; | |
| static inline UBool | |
| isASCIIString(const UnicodeString &dest) { | |
| const UChar *s=dest.getBuffer(); | |
| const UChar *limit=s+dest.length(); | |
| while(s<limit) { | |
| if(*s++>0x7f) { | |
| return FALSE; | |
| } | |
| } | |
| return TRUE; | |
| } | |
| static UBool | |
| isASCIIOkBiDi(const UChar *s, int32_t length); | |
| static UBool | |
| isASCIIOkBiDi(const char *s, int32_t length); | |
| // IDNA class default implementations -------------------------------------- *** | |
| void | |
| IDNA::labelToASCII_UTF8(const StringPiece &label, ByteSink &dest, | |
| IDNAInfo &info, UErrorCode &errorCode) const { | |
| if(U_SUCCESS(errorCode)) { | |
| UnicodeString destString; | |
| labelToASCII(UnicodeString::fromUTF8(label), destString, | |
| info, errorCode).toUTF8(dest); | |
| } | |
| } | |
| void | |
| IDNA::labelToUnicodeUTF8(const StringPiece &label, ByteSink &dest, | |
| IDNAInfo &info, UErrorCode &errorCode) const { | |
| if(U_SUCCESS(errorCode)) { | |
| UnicodeString destString; | |
| labelToUnicode(UnicodeString::fromUTF8(label), destString, | |
| info, errorCode).toUTF8(dest); | |
| } | |
| } | |
| void | |
| IDNA::nameToASCII_UTF8(const StringPiece &name, ByteSink &dest, | |
| IDNAInfo &info, UErrorCode &errorCode) const { | |
| if(U_SUCCESS(errorCode)) { | |
| UnicodeString destString; | |
| nameToASCII(UnicodeString::fromUTF8(name), destString, | |
| info, errorCode).toUTF8(dest); | |
| } | |
| } | |
| void | |
| IDNA::nameToUnicodeUTF8(const StringPiece &name, ByteSink &dest, | |
| IDNAInfo &info, UErrorCode &errorCode) const { | |
| if(U_SUCCESS(errorCode)) { | |
| UnicodeString destString; | |
| nameToUnicode(UnicodeString::fromUTF8(name), destString, | |
| info, errorCode).toUTF8(dest); | |
| } | |
| } | |
| UOBJECT_DEFINE_NO_RTTI_IMPLEMENTATION(IDNA) | |
| // UTS46 class declaration ------------------------------------------------- *** | |
| class UTS46 : public IDNA { | |
| public: | |
| UTS46(uint32_t options, UErrorCode &errorCode); | |
| virtual ~UTS46(); | |
| virtual UnicodeString & | |
| labelToASCII(const UnicodeString &label, UnicodeString &dest, | |
| IDNAInfo &info, UErrorCode &errorCode) const; | |
| virtual UnicodeString & | |
| labelToUnicode(const UnicodeString &label, UnicodeString &dest, | |
| IDNAInfo &info, UErrorCode &errorCode) const; | |
| virtual UnicodeString & | |
| nameToASCII(const UnicodeString &name, UnicodeString &dest, | |
| IDNAInfo &info, UErrorCode &errorCode) const; | |
| virtual UnicodeString & | |
| nameToUnicode(const UnicodeString &name, UnicodeString &dest, | |
| IDNAInfo &info, UErrorCode &errorCode) const; | |
| virtual void | |
| labelToASCII_UTF8(const StringPiece &label, ByteSink &dest, | |
| IDNAInfo &info, UErrorCode &errorCode) const; | |
| virtual void | |
| labelToUnicodeUTF8(const StringPiece &label, ByteSink &dest, | |
| IDNAInfo &info, UErrorCode &errorCode) const; | |
| virtual void | |
| nameToASCII_UTF8(const StringPiece &name, ByteSink &dest, | |
| IDNAInfo &info, UErrorCode &errorCode) const; | |
| virtual void | |
| nameToUnicodeUTF8(const StringPiece &name, ByteSink &dest, | |
| IDNAInfo &info, UErrorCode &errorCode) const; | |
| private: | |
| UnicodeString & | |
| process(const UnicodeString &src, | |
| UBool isLabel, UBool toASCII, | |
| UnicodeString &dest, | |
| IDNAInfo &info, UErrorCode &errorCode) const; | |
| void | |
| processUTF8(const StringPiece &src, | |
| UBool isLabel, UBool toASCII, | |
| ByteSink &dest, | |
| IDNAInfo &info, UErrorCode &errorCode) const; | |
| UnicodeString & | |
| processUnicode(const UnicodeString &src, | |
| int32_t labelStart, int32_t mappingStart, | |
| UBool isLabel, UBool toASCII, | |
| UnicodeString &dest, | |
| IDNAInfo &info, UErrorCode &errorCode) const; | |
| // returns the new dest.length() | |
| int32_t | |
| mapDevChars(UnicodeString &dest, int32_t labelStart, int32_t mappingStart, | |
| UErrorCode &errorCode) const; | |
| // returns the new label length | |
| int32_t | |
| processLabel(UnicodeString &dest, | |
| int32_t labelStart, int32_t labelLength, | |
| UBool toASCII, | |
| IDNAInfo &info, UErrorCode &errorCode) const; | |
| int32_t | |
| markBadACELabel(UnicodeString &dest, | |
| int32_t labelStart, int32_t labelLength, | |
| UBool toASCII, IDNAInfo &info) const; | |
| void | |
| checkLabelBiDi(const UChar *label, int32_t labelLength, IDNAInfo &info) const; | |
| UBool | |
| isLabelOkContextJ(const UChar *label, int32_t labelLength) const; | |
| const Normalizer2 &uts46Norm2; // uts46.nrm | |
| uint32_t options; | |
| }; | |
| IDNA * | |
| IDNA::createUTS46Instance(uint32_t options, UErrorCode &errorCode) { | |
| if(U_SUCCESS(errorCode)) { | |
| IDNA *idna=new UTS46(options, errorCode); | |
| if(idna==NULL) { | |
| errorCode=U_MEMORY_ALLOCATION_ERROR; | |
| } else if(U_FAILURE(errorCode)) { | |
| delete idna; | |
| idna=NULL; | |
| } | |
| return idna; | |
| } else { | |
| return NULL; | |
| } | |
| } | |
| // UTS46 implementation ---------------------------------------------------- *** | |
| UTS46::UTS46(uint32_t opt, UErrorCode &errorCode) | |
| : uts46Norm2(*Normalizer2::getInstance(NULL, "uts46", UNORM2_COMPOSE, errorCode)), | |
| options(opt) {} | |
| UTS46::~UTS46() {} | |
| UnicodeString & | |
| UTS46::labelToASCII(const UnicodeString &label, UnicodeString &dest, | |
| IDNAInfo &info, UErrorCode &errorCode) const { | |
| return process(label, TRUE, TRUE, dest, info, errorCode); | |
| } | |
| UnicodeString & | |
| UTS46::labelToUnicode(const UnicodeString &label, UnicodeString &dest, | |
| IDNAInfo &info, UErrorCode &errorCode) const { | |
| return process(label, TRUE, FALSE, dest, info, errorCode); | |
| } | |
| UnicodeString & | |
| UTS46::nameToASCII(const UnicodeString &name, UnicodeString &dest, | |
| IDNAInfo &info, UErrorCode &errorCode) const { | |
| process(name, FALSE, TRUE, dest, info, errorCode); | |
| if( dest.length()>=254 && (info.errors&UIDNA_ERROR_DOMAIN_NAME_TOO_LONG)==0 && | |
| isASCIIString(dest) && | |
| (dest.length()>254 || dest[253]!=0x2e) | |
| ) { | |
| info.errors|=UIDNA_ERROR_DOMAIN_NAME_TOO_LONG; | |
| } | |
| return dest; | |
| } | |
| UnicodeString & | |
| UTS46::nameToUnicode(const UnicodeString &name, UnicodeString &dest, | |
| IDNAInfo &info, UErrorCode &errorCode) const { | |
| return process(name, FALSE, FALSE, dest, info, errorCode); | |
| } | |
| void | |
| UTS46::labelToASCII_UTF8(const StringPiece &label, ByteSink &dest, | |
| IDNAInfo &info, UErrorCode &errorCode) const { | |
| processUTF8(label, TRUE, TRUE, dest, info, errorCode); | |
| } | |
| void | |
| UTS46::labelToUnicodeUTF8(const StringPiece &label, ByteSink &dest, | |
| IDNAInfo &info, UErrorCode &errorCode) const { | |
| processUTF8(label, TRUE, FALSE, dest, info, errorCode); | |
| } | |
| void | |
| UTS46::nameToASCII_UTF8(const StringPiece &name, ByteSink &dest, | |
| IDNAInfo &info, UErrorCode &errorCode) const { | |
| processUTF8(name, FALSE, TRUE, dest, info, errorCode); | |
| } | |
| void | |
| UTS46::nameToUnicodeUTF8(const StringPiece &name, ByteSink &dest, | |
| IDNAInfo &info, UErrorCode &errorCode) const { | |
| processUTF8(name, FALSE, FALSE, dest, info, errorCode); | |
| } | |
| // UTS #46 data for ASCII characters. | |
| // The normalizer (using uts46.nrm) maps uppercase ASCII letters to lowercase | |
| // and passes through all other ASCII characters. | |
| // If UIDNA_USE_STD3_RULES is set, then non-LDH characters are disallowed | |
| // using this data. | |
| // The ASCII fastpath also uses this data. | |
| // Values: -1=disallowed 0==valid 1==mapped (lowercase) | |
| static const int8_t asciiData[128]={ | |
| -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
| -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
| // 002D..002E; valid # HYPHEN-MINUS..FULL STOP | |
| -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 0, -1, | |
| // 0030..0039; valid # DIGIT ZERO..DIGIT NINE | |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, -1, -1, -1, -1, -1, | |
| // 0041..005A; mapped # LATIN CAPITAL LETTER A..LATIN CAPITAL LETTER Z | |
| -1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, | |
| 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, -1, -1, -1, -1, -1, | |
| // 0061..007A; valid # LATIN SMALL LETTER A..LATIN SMALL LETTER Z | |
| -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, -1, -1, -1, -1 | |
| }; | |
| UnicodeString & | |
| UTS46::process(const UnicodeString &src, | |
| UBool isLabel, UBool toASCII, | |
| UnicodeString &dest, | |
| IDNAInfo &info, UErrorCode &errorCode) const { | |
| // uts46Norm2.normalize() would do all of this error checking and setup, | |
| // but with the ASCII fastpath we do not always call it, and do not | |
| // call it first. | |
| if(U_FAILURE(errorCode)) { | |
| dest.setToBogus(); | |
| return dest; | |
| } | |
| const UChar *srcArray=src.getBuffer(); | |
| if(&dest==&src || srcArray==NULL) { | |
| errorCode=U_ILLEGAL_ARGUMENT_ERROR; | |
| dest.setToBogus(); | |
| return dest; | |
| } | |
| // Arguments are fine, reset output values. | |
| dest.remove(); | |
| info.reset(); | |
| int32_t srcLength=src.length(); | |
| if(srcLength==0) { | |
| if(toASCII) { | |
| info.errors|=UIDNA_ERROR_EMPTY_LABEL; | |
| } | |
| return dest; | |
| } | |
| UChar *destArray=dest.getBuffer(srcLength); | |
| if(destArray==NULL) { | |
| errorCode=U_MEMORY_ALLOCATION_ERROR; | |
| return dest; | |
| } | |
| // ASCII fastpath | |
| UBool disallowNonLDHDot=(options&UIDNA_USE_STD3_RULES)!=0; | |
| int32_t labelStart=0; | |
| int32_t i; | |
| for(i=0;; ++i) { | |
| if(i==srcLength) { | |
| if(toASCII) { | |
| if((i-labelStart)>63) { | |
| info.labelErrors|=UIDNA_ERROR_LABEL_TOO_LONG; | |
| } | |
| // There is a trailing dot if labelStart==i. | |
| if(!isLabel && i>=254 && (i>254 || labelStart<i)) { | |
| info.errors|=UIDNA_ERROR_DOMAIN_NAME_TOO_LONG; | |
| } | |
| } | |
| info.errors|=info.labelErrors; | |
| dest.releaseBuffer(i); | |
| return dest; | |
| } | |
| UChar c=srcArray[i]; | |
| if(c>0x7f) { | |
| break; | |
| } | |
| int cData=asciiData[c]; | |
| if(cData>0) { | |
| destArray[i]=c+0x20; // Lowercase an uppercase ASCII letter. | |
| } else if(cData<0 && disallowNonLDHDot) { | |
| break; // Replacing with U+FFFD can be complicated for toASCII. | |
| } else { | |
| destArray[i]=c; | |
| if(c==0x2d) { // hyphen | |
| if(i==(labelStart+3) && srcArray[i-1]==0x2d) { | |
| // "??--..." is Punycode or forbidden. | |
| ++i; // '-' was copied to dest already | |
| break; | |
| } | |
| if(i==labelStart) { | |
| // label starts with "-" | |
| info.labelErrors|=UIDNA_ERROR_LEADING_HYPHEN; | |
| } | |
| if((i+1)==srcLength || srcArray[i+1]==0x2e) { | |
| // label ends with "-" | |
| info.labelErrors|=UIDNA_ERROR_TRAILING_HYPHEN; | |
| } | |
| } else if(c==0x2e) { // dot | |
| if(isLabel) { | |
| // Replacing with U+FFFD can be complicated for toASCII. | |
| ++i; // '.' was copied to dest already | |
| break; | |
| } | |
| if(toASCII) { | |
| // Permit an empty label at the end but not elsewhere. | |
| if(i==labelStart && i<(srcLength-1)) { | |
| info.labelErrors|=UIDNA_ERROR_EMPTY_LABEL; | |
| } else if((i-labelStart)>63) { | |
| info.labelErrors|=UIDNA_ERROR_LABEL_TOO_LONG; | |
| } | |
| } | |
| info.errors|=info.labelErrors; | |
| info.labelErrors=0; | |
| labelStart=i+1; | |
| } | |
| } | |
| } | |
| info.errors|=info.labelErrors; | |
| dest.releaseBuffer(i); | |
| processUnicode(src, labelStart, i, isLabel, toASCII, dest, info, errorCode); | |
| if( info.isBiDi && U_SUCCESS(errorCode) && (info.errors&severeErrors)==0 && | |
| (!info.isOkBiDi || (labelStart>0 && !isASCIIOkBiDi(dest.getBuffer(), labelStart))) | |
| ) { | |
| info.errors|=UIDNA_ERROR_BIDI; | |
| } | |
| return dest; | |
| } | |
| void | |
| UTS46::processUTF8(const StringPiece &src, | |
| UBool isLabel, UBool toASCII, | |
| ByteSink &dest, | |
| IDNAInfo &info, UErrorCode &errorCode) const { | |
| if(U_FAILURE(errorCode)) { | |
| return; | |
| } | |
| const char *srcArray=src.data(); | |
| int32_t srcLength=src.length(); | |
| if(srcArray==NULL && srcLength!=0) { | |
| errorCode=U_ILLEGAL_ARGUMENT_ERROR; | |
| return; | |
| } | |
| // Arguments are fine, reset output values. | |
| info.reset(); | |
| if(srcLength==0) { | |
| if(toASCII) { | |
| info.errors|=UIDNA_ERROR_EMPTY_LABEL; | |
| } | |
| dest.Flush(); | |
| return; | |
| } | |
| UnicodeString destString; | |
| int32_t labelStart=0; | |
| if(srcLength<=256) { // length of stackArray[] | |
| // ASCII fastpath | |
| char stackArray[256]; | |
| int32_t destCapacity; | |
| char *destArray=dest.GetAppendBuffer(srcLength, srcLength+20, | |
| stackArray, LENGTHOF(stackArray), &destCapacity); | |
| UBool disallowNonLDHDot=(options&UIDNA_USE_STD3_RULES)!=0; | |
| int32_t i; | |
| for(i=0;; ++i) { | |
| if(i==srcLength) { | |
| if(toASCII) { | |
| if((i-labelStart)>63) { | |
| info.labelErrors|=UIDNA_ERROR_LABEL_TOO_LONG; | |
| } | |
| // There is a trailing dot if labelStart==i. | |
| if(!isLabel && i>=254 && (i>254 || labelStart<i)) { | |
| info.errors|=UIDNA_ERROR_DOMAIN_NAME_TOO_LONG; | |
| } | |
| } | |
| info.errors|=info.labelErrors; | |
| dest.Append(destArray, i); | |
| dest.Flush(); | |
| return; | |
| } | |
| char c=srcArray[i]; | |
| if((int8_t)c<0) { // (uint8_t)c>0x7f | |
| break; | |
| } | |
| int cData=asciiData[(int)c]; // Cast: gcc warns about indexing with a char. | |
| if(cData>0) { | |
| destArray[i]=c+0x20; // Lowercase an uppercase ASCII letter. | |
| } else if(cData<0 && disallowNonLDHDot) { | |
| break; // Replacing with U+FFFD can be complicated for toASCII. | |
| } else { | |
| destArray[i]=c; | |
| if(c==0x2d) { // hyphen | |
| if(i==(labelStart+3) && srcArray[i-1]==0x2d) { | |
| // "??--..." is Punycode or forbidden. | |
| break; | |
| } | |
| if(i==labelStart) { | |
| // label starts with "-" | |
| info.labelErrors|=UIDNA_ERROR_LEADING_HYPHEN; | |
| } | |
| if((i+1)==srcLength || srcArray[i+1]==0x2e) { | |
| // label ends with "-" | |
| info.labelErrors|=UIDNA_ERROR_TRAILING_HYPHEN; | |
| } | |
| } else if(c==0x2e) { // dot | |
| if(isLabel) { | |
| break; // Replacing with U+FFFD can be complicated for toASCII. | |
| } | |
| if(toASCII) { | |
| // Permit an empty label at the end but not elsewhere. | |
| if(i==labelStart && i<(srcLength-1)) { | |
| info.labelErrors|=UIDNA_ERROR_EMPTY_LABEL; | |
| } else if((i-labelStart)>63) { | |
| info.labelErrors|=UIDNA_ERROR_LABEL_TOO_LONG; | |
| } | |
| } | |
| info.errors|=info.labelErrors; | |
| info.labelErrors=0; | |
| labelStart=i+1; | |
| } | |
| } | |
| } | |
| info.errors|=info.labelErrors; | |
| // Convert the processed ASCII prefix of the current label to UTF-16. | |
| int32_t mappingStart=i-labelStart; | |
| destString=UnicodeString::fromUTF8(StringPiece(destArray+labelStart, mappingStart)); | |
| // Output the previous ASCII labels and process the rest of src in UTF-16. | |
| dest.Append(destArray, labelStart); | |
| processUnicode(UnicodeString::fromUTF8(StringPiece(src, labelStart)), 0, mappingStart, | |
| isLabel, toASCII, | |
| destString, info, errorCode); | |
| } else { | |
| // src is too long for the ASCII fastpath implementation. | |
| processUnicode(UnicodeString::fromUTF8(src), 0, 0, | |
| isLabel, toASCII, | |
| destString, info, errorCode); | |
| } | |
| destString.toUTF8(dest); // calls dest.Flush() | |
| if(toASCII && !isLabel) { | |
| // length==labelStart==254 means that there is a trailing dot (ok) and | |
| // destString is empty (do not index at 253-labelStart). | |
| int32_t length=labelStart+destString.length(); | |
| if( length>=254 && isASCIIString(destString) && | |
| (length>254 || | |
| (labelStart<254 && destString[253-labelStart]!=0x2e)) | |
| ) { | |
| info.errors|=UIDNA_ERROR_DOMAIN_NAME_TOO_LONG; | |
| } | |
| } | |
| if( info.isBiDi && U_SUCCESS(errorCode) && (info.errors&severeErrors)==0 && | |
| (!info.isOkBiDi || (labelStart>0 && !isASCIIOkBiDi(srcArray, labelStart))) | |
| ) { | |
| info.errors|=UIDNA_ERROR_BIDI; | |
| } | |
| } | |
| UnicodeString & | |
| UTS46::processUnicode(const UnicodeString &src, | |
| int32_t labelStart, int32_t mappingStart, | |
| UBool isLabel, UBool toASCII, | |
| UnicodeString &dest, | |
| IDNAInfo &info, UErrorCode &errorCode) const { | |
| if(mappingStart==0) { | |
| uts46Norm2.normalize(src, dest, errorCode); | |
| } else { | |
| uts46Norm2.normalizeSecondAndAppend(dest, src.tempSubString(mappingStart), errorCode); | |
| } | |
| if(U_FAILURE(errorCode)) { | |
| return dest; | |
| } | |
| UBool doMapDevChars= | |
| toASCII ? (options&UIDNA_NONTRANSITIONAL_TO_ASCII)==0 : | |
| (options&UIDNA_NONTRANSITIONAL_TO_UNICODE)==0; | |
| const UChar *destArray=dest.getBuffer(); | |
| int32_t destLength=dest.length(); | |
| int32_t labelLimit=labelStart; | |
| while(labelLimit<destLength) { | |
| UChar c=destArray[labelLimit]; | |
| if(c==0x2e && !isLabel) { | |
| int32_t labelLength=labelLimit-labelStart; | |
| int32_t newLength=processLabel(dest, labelStart, labelLength, | |
| toASCII, info, errorCode); | |
| info.errors|=info.labelErrors; | |
| info.labelErrors=0; | |
| if(U_FAILURE(errorCode)) { | |
| return dest; | |
| } | |
| destArray=dest.getBuffer(); | |
| destLength+=newLength-labelLength; | |
| labelLimit=labelStart+=newLength+1; | |
| } else if(0xdf<=c && c<=0x200d && (c==0xdf || c==0x3c2 || c>=0x200c)) { | |
| info.isTransDiff=TRUE; | |
| if(doMapDevChars) { | |
| destLength=mapDevChars(dest, labelStart, labelLimit, errorCode); | |
| if(U_FAILURE(errorCode)) { | |
| return dest; | |
| } | |
| destArray=dest.getBuffer(); | |
| // Do not increment labelLimit in case c was removed. | |
| // All deviation characters have been mapped, no need to check for them again. | |
| doMapDevChars=FALSE; | |
| } else { | |
| ++labelLimit; | |
| } | |
| } else { | |
| ++labelLimit; | |
| } | |
| } | |
| // Permit an empty label at the end (0<labelStart==labelLimit==destLength is ok) | |
| // but not an empty label elsewhere nor a completely empty domain name. | |
| // processLabel() sets UIDNA_ERROR_EMPTY_LABEL when labelLength==0. | |
| if(0==labelStart || labelStart<labelLimit) { | |
| processLabel(dest, labelStart, labelLimit-labelStart, | |
| toASCII, info, errorCode); | |
| info.errors|=info.labelErrors; | |
| } | |
| return dest; | |
| } | |
| int32_t | |
| UTS46::mapDevChars(UnicodeString &dest, int32_t labelStart, int32_t mappingStart, | |
| UErrorCode &errorCode) const { | |
| int32_t length=dest.length(); | |
| UChar *s=dest.getBuffer(dest[mappingStart]==0xdf ? length+1 : length); | |
| if(s==NULL) { | |
| errorCode=U_MEMORY_ALLOCATION_ERROR; | |
| return length; | |
| } | |
| int32_t capacity=dest.getCapacity(); | |
| UBool didMapDevChars=FALSE; | |
| int32_t readIndex=mappingStart, writeIndex=mappingStart; | |
| do { | |
| UChar c=s[readIndex++]; | |
| switch(c) { | |
| case 0xdf: | |
| // Map sharp s to ss. | |
| didMapDevChars=TRUE; | |
| s[writeIndex++]=0x73; // Replace sharp s with first s. | |
| // Insert second s and account for possible buffer reallocation. | |
| if(writeIndex==readIndex) { | |
| if(length==capacity) { | |
| dest.releaseBuffer(length); | |
| s=dest.getBuffer(length+1); | |
| if(s==NULL) { | |
| errorCode=U_MEMORY_ALLOCATION_ERROR; | |
| return length; | |
| } | |
| capacity=dest.getCapacity(); | |
| } | |
| u_memmove(s+writeIndex+1, s+writeIndex, length-writeIndex); | |
| ++readIndex; | |
| } | |
| s[writeIndex++]=0x73; | |
| ++length; | |
| break; | |
| case 0x3c2: // Map final sigma to nonfinal sigma. | |
| didMapDevChars=TRUE; | |
| s[writeIndex++]=0x3c3; | |
| break; | |
| case 0x200c: // Ignore/remove ZWNJ. | |
| case 0x200d: // Ignore/remove ZWJ. | |
| didMapDevChars=TRUE; | |
| --length; | |
| break; | |
| default: | |
| // Only really necessary if writeIndex was different from readIndex. | |
| s[writeIndex++]=c; | |
| break; | |
| } | |
| } while(writeIndex<length); | |
| dest.releaseBuffer(length); | |
| if(didMapDevChars) { | |
| // Mapping deviation characters might have resulted in an un-NFC string. | |
| // We could use either the NFC or the UTS #46 normalizer. | |
| // By using the UTS #46 normalizer again, we avoid having to load a second .nrm data file. | |
| UnicodeString normalized; | |
| uts46Norm2.normalize(dest.tempSubString(labelStart), normalized, errorCode); | |
| if(U_SUCCESS(errorCode)) { | |
| dest.replace(labelStart, 0x7fffffff, normalized); | |
| return dest.length(); | |
| } | |
| } | |
| return length; | |
| } | |
| // Some non-ASCII characters are equivalent to sequences with | |
| // non-LDH ASCII characters. To find them: | |
| // grep disallowed_STD3_valid IdnaMappingTable.txt (or uts46.txt) | |
| static inline UBool | |
| isNonASCIIDisallowedSTD3Valid(UChar32 c) { | |
| return c==0x2260 || c==0x226E || c==0x226F; | |
| } | |
| // Replace the label in dest with the label string, if the label was modified. | |
| // If &label==&dest then the label was modified in-place and labelLength | |
| // is the new label length, different from label.length(). | |
| // If &label!=&dest then labelLength==label.length(). | |
| // Returns labelLength (= the new label length). | |
| static int32_t | |
| replaceLabel(UnicodeString &dest, int32_t destLabelStart, int32_t destLabelLength, | |
| const UnicodeString &label, int32_t labelLength) { | |
| if(&label!=&dest) { | |
| dest.replace(destLabelStart, destLabelLength, label); | |
| } | |
| return labelLength; | |
| } | |
| int32_t | |
| UTS46::processLabel(UnicodeString &dest, | |
| int32_t labelStart, int32_t labelLength, | |
| UBool toASCII, | |
| IDNAInfo &info, UErrorCode &errorCode) const { | |
| UnicodeString fromPunycode; | |
| UnicodeString *labelString; | |
| const UChar *label=dest.getBuffer()+labelStart; | |
| int32_t destLabelStart=labelStart; | |
| int32_t destLabelLength=labelLength; | |
| UBool wasPunycode; | |
| if(labelLength>=4 && label[0]==0x78 && label[1]==0x6e && label[2]==0x2d && label[3]==0x2d) { | |
| // Label starts with "xn--", try to un-Punycode it. | |
| wasPunycode=TRUE; | |
| UChar *unicodeBuffer=fromPunycode.getBuffer(-1); // capacity==-1: most labels should fit | |
| if(unicodeBuffer==NULL) { | |
| // Should never occur if we used capacity==-1 which uses the internal buffer. | |
| errorCode=U_MEMORY_ALLOCATION_ERROR; | |
| return labelLength; | |
| } | |
| UErrorCode punycodeErrorCode=U_ZERO_ERROR; | |
| int32_t unicodeLength=u_strFromPunycode(label+4, labelLength-4, | |
| unicodeBuffer, fromPunycode.getCapacity(), | |
| NULL, &punycodeErrorCode); | |
| if(punycodeErrorCode==U_BUFFER_OVERFLOW_ERROR) { | |
| fromPunycode.releaseBuffer(0); | |
| unicodeBuffer=fromPunycode.getBuffer(unicodeLength); | |
| if(unicodeBuffer==NULL) { | |
| errorCode=U_MEMORY_ALLOCATION_ERROR; | |
| return labelLength; | |
| } | |
| punycodeErrorCode=U_ZERO_ERROR; | |
| unicodeLength=u_strFromPunycode(label+4, labelLength-4, | |
| unicodeBuffer, fromPunycode.getCapacity(), | |
| NULL, &punycodeErrorCode); | |
| } | |
| fromPunycode.releaseBuffer(unicodeLength); | |
| if(U_FAILURE(punycodeErrorCode)) { | |
| info.labelErrors|=UIDNA_ERROR_PUNYCODE; | |
| return markBadACELabel(dest, labelStart, labelLength, toASCII, info); | |
| } | |
| // Check for NFC, and for characters that are not | |
| // valid or deviation characters according to the normalizer. | |
| // If there is something wrong, then the string will change. | |
| // Note that the normalizer passes through non-LDH ASCII and deviation characters. | |
| // Deviation characters are ok in Punycode even in transitional processing. | |
| // In the code further below, if we find non-LDH ASCII and we have UIDNA_USE_STD3_RULES | |
| // then we will set UIDNA_ERROR_INVALID_ACE_LABEL there too. | |
| UBool isValid=uts46Norm2.isNormalized(fromPunycode, errorCode); | |
| if(U_FAILURE(errorCode)) { | |
| return labelLength; | |
| } | |
| if(!isValid) { | |
| info.labelErrors|=UIDNA_ERROR_INVALID_ACE_LABEL; | |
| return markBadACELabel(dest, labelStart, labelLength, toASCII, info); | |
| } | |
| labelString=&fromPunycode; | |
| label=fromPunycode.getBuffer(); | |
| labelStart=0; | |
| labelLength=fromPunycode.length(); | |
| } else { | |
| wasPunycode=FALSE; | |
| labelString=&dest; | |
| } | |
| // Validity check | |
| if(labelLength==0) { | |
| if(toASCII) { | |
| info.labelErrors|=UIDNA_ERROR_EMPTY_LABEL; | |
| } | |
| return replaceLabel(dest, destLabelStart, destLabelLength, *labelString, labelLength); | |
| } | |
| // labelLength>0 | |
| if(labelLength>=4 && label[2]==0x2d && label[3]==0x2d) { | |
| // label starts with "??--" | |
| info.labelErrors|=UIDNA_ERROR_HYPHEN_3_4; | |
| } | |
| if(label[0]==0x2d) { | |
| // label starts with "-" | |
| info.labelErrors|=UIDNA_ERROR_LEADING_HYPHEN; | |
| } | |
| if(label[labelLength-1]==0x2d) { | |
| // label ends with "-" | |
| info.labelErrors|=UIDNA_ERROR_TRAILING_HYPHEN; | |
| } | |
| // If the label was not a Punycode label, then it was the result of | |
| // mapping, normalization and label segmentation. | |
| // If the label was in Punycode, then we mapped it again above | |
| // and checked its validity. | |
| // Now we handle the STD3 restriction to LDH characters (if set) | |
| // and we look for U+FFFD which indicates disallowed characters | |
| // in a non-Punycode label or U+FFFD itself in a Punycode label. | |
| // We also check for dots which can come from the input to a single-label function. | |
| // Ok to cast away const because we own the UnicodeString. | |
| UChar *s=(UChar *)label; | |
| const UChar *limit=label+labelLength; | |
| UChar oredChars=0; | |
| // If we enforce STD3 rules, then ASCII characters other than LDH and dot are disallowed. | |
| UBool disallowNonLDHDot=(options&UIDNA_USE_STD3_RULES)!=0; | |
| do { | |
| UChar c=*s; | |
| if(c<=0x7f) { | |
| if(c==0x2e) { | |
| info.labelErrors|=UIDNA_ERROR_LABEL_HAS_DOT; | |
| *s=0xfffd; | |
| } else if(disallowNonLDHDot && asciiData[c]<0) { | |
| info.labelErrors|=UIDNA_ERROR_DISALLOWED; | |
| *s=0xfffd; | |
| } | |
| } else { | |
| oredChars|=c; | |
| if(disallowNonLDHDot && isNonASCIIDisallowedSTD3Valid(c)) { | |
| info.labelErrors|=UIDNA_ERROR_DISALLOWED; | |
| *s=0xfffd; | |
| } else if(c==0xfffd) { | |
| info.labelErrors|=UIDNA_ERROR_DISALLOWED; | |
| } | |
| } | |
| ++s; | |
| } while(s<limit); | |
| // Check for a leading combining mark after other validity checks | |
| // so that we don't report UIDNA_ERROR_DISALLOWED for the U+FFFD from here. | |
| UChar32 c; | |
| int32_t cpLength=0; | |
| // "Unsafe" is ok because unpaired surrogates were mapped to U+FFFD. | |
| U16_NEXT_UNSAFE(label, cpLength, c); | |
| if((U_GET_GC_MASK(c)&U_GC_M_MASK)!=0) { | |
| info.labelErrors|=UIDNA_ERROR_LEADING_COMBINING_MARK; | |
| labelString->replace(labelStart, cpLength, (UChar)0xfffd); | |
| label=labelString->getBuffer()+labelStart; | |
| labelLength+=1-cpLength; | |
| if(labelString==&dest) { | |
| destLabelLength=labelLength; | |
| } | |
| } | |
| if((info.labelErrors&severeErrors)==0) { | |
| // Do contextual checks only if we do not have U+FFFD from a severe error | |
| // because U+FFFD can make these checks fail. | |
| if((options&UIDNA_CHECK_BIDI)!=0 && (!info.isBiDi || info.isOkBiDi)) { | |
| checkLabelBiDi(label, labelLength, info); | |
| } | |
| if( (options&UIDNA_CHECK_CONTEXTJ)!=0 && (oredChars&0x200c)==0x200c && | |
| !isLabelOkContextJ(label, labelLength) | |
| ) { | |
| info.labelErrors|=UIDNA_ERROR_CONTEXTJ; | |
| } | |
| if(toASCII) { | |
| if(wasPunycode) { | |
| // Leave a Punycode label unchanged if it has no severe errors. | |
| if(destLabelLength>63) { | |
| info.labelErrors|=UIDNA_ERROR_LABEL_TOO_LONG; | |
| } | |
| return destLabelLength; | |
| } else if(oredChars>=0x80) { | |
| // Contains non-ASCII characters. | |
| UnicodeString punycode; | |
| UChar *buffer=punycode.getBuffer(63); // 63==maximum DNS label length | |
| if(buffer==NULL) { | |
| errorCode=U_MEMORY_ALLOCATION_ERROR; | |
| return destLabelLength; | |
| } | |
| buffer[0]=0x78; // Write "xn--". | |
| buffer[1]=0x6e; | |
| buffer[2]=0x2d; | |
| buffer[3]=0x2d; | |
| int32_t punycodeLength=u_strToPunycode(label, labelLength, | |
| buffer+4, punycode.getCapacity()-4, | |
| NULL, &errorCode); | |
| if(errorCode==U_BUFFER_OVERFLOW_ERROR) { | |
| errorCode=U_ZERO_ERROR; | |
| punycode.releaseBuffer(4); | |
| buffer=punycode.getBuffer(4+punycodeLength); | |
| if(buffer==NULL) { | |
| errorCode=U_MEMORY_ALLOCATION_ERROR; | |
| return destLabelLength; | |
| } | |
| punycodeLength=u_strToPunycode(label, labelLength, | |
| buffer+4, punycode.getCapacity()-4, | |
| NULL, &errorCode); | |
| } | |
| punycodeLength+=4; | |
| punycode.releaseBuffer(punycodeLength); | |
| if(U_FAILURE(errorCode)) { | |
| return destLabelLength; | |
| } | |
| if(punycodeLength>63) { | |
| info.labelErrors|=UIDNA_ERROR_LABEL_TOO_LONG; | |
| } | |
| return replaceLabel(dest, destLabelStart, destLabelLength, | |
| punycode, punycodeLength); | |
| } else { | |
| // all-ASCII label | |
| if(labelLength>63) { | |
| info.labelErrors|=UIDNA_ERROR_LABEL_TOO_LONG; | |
| } | |
| } | |
| } | |
| } else { | |
| // If a Punycode label has severe errors, | |
| // then leave it but make sure it does not look valid. | |
| if(wasPunycode) { | |
| info.labelErrors|=UIDNA_ERROR_INVALID_ACE_LABEL; | |
| return markBadACELabel(dest, destLabelStart, destLabelLength, toASCII, info); | |
| } | |
| } | |
| return replaceLabel(dest, destLabelStart, destLabelLength, *labelString, labelLength); | |
| } | |
| // Make sure an ACE label does not look valid. | |
| // Append U+FFFD if the label has only LDH characters. | |
| // If UIDNA_USE_STD3_RULES, also replace disallowed ASCII characters with U+FFFD. | |
| int32_t | |
| UTS46::markBadACELabel(UnicodeString &dest, | |
| int32_t labelStart, int32_t labelLength, | |
| UBool toASCII, IDNAInfo &info) const { | |
| UBool disallowNonLDHDot=(options&UIDNA_USE_STD3_RULES)!=0; | |
| UBool isASCII=TRUE; | |
| UBool onlyLDH=TRUE; | |
| const UChar *label=dest.getBuffer()+labelStart; | |
| // Ok to cast away const because we own the UnicodeString. | |
| UChar *s=(UChar *)label+4; // After the initial "xn--". | |
| const UChar *limit=label+labelLength; | |
| do { | |
| UChar c=*s; | |
| if(c<=0x7f) { | |
| if(c==0x2e) { | |
| info.labelErrors|=UIDNA_ERROR_LABEL_HAS_DOT; | |
| *s=0xfffd; | |
| isASCII=onlyLDH=FALSE; | |
| } else if(asciiData[c]<0) { | |
| onlyLDH=FALSE; | |
| if(disallowNonLDHDot) { | |
| *s=0xfffd; | |
| isASCII=FALSE; | |
| } | |
| } | |
| } else { | |
| isASCII=onlyLDH=FALSE; | |
| } | |
| } while(++s<limit); | |
| if(onlyLDH) { | |
| dest.insert(labelStart+labelLength, (UChar)0xfffd); | |
| ++labelLength; | |
| } else { | |
| if(toASCII && isASCII && labelLength>63) { | |
| info.labelErrors|=UIDNA_ERROR_LABEL_TOO_LONG; | |
| } | |
| } | |
| return labelLength; | |
| } | |
| const uint32_t L_MASK=U_MASK(U_LEFT_TO_RIGHT); | |
| const uint32_t R_AL_MASK=U_MASK(U_RIGHT_TO_LEFT)|U_MASK(U_RIGHT_TO_LEFT_ARABIC); | |
| const uint32_t L_R_AL_MASK=L_MASK|R_AL_MASK; | |
| const uint32_t R_AL_AN_MASK=R_AL_MASK|U_MASK(U_ARABIC_NUMBER); | |
| const uint32_t EN_AN_MASK=U_MASK(U_EUROPEAN_NUMBER)|U_MASK(U_ARABIC_NUMBER); | |
| const uint32_t R_AL_EN_AN_MASK=R_AL_MASK|EN_AN_MASK; | |
| const uint32_t L_EN_MASK=L_MASK|U_MASK(U_EUROPEAN_NUMBER); | |
| const uint32_t ES_CS_ET_ON_BN_NSM_MASK= | |
| U_MASK(U_EUROPEAN_NUMBER_SEPARATOR)| | |
| U_MASK(U_COMMON_NUMBER_SEPARATOR)| | |
| U_MASK(U_EUROPEAN_NUMBER_TERMINATOR)| | |
| U_MASK(U_OTHER_NEUTRAL)| | |
| U_MASK(U_BOUNDARY_NEUTRAL)| | |
| U_MASK(U_DIR_NON_SPACING_MARK); | |
| const uint32_t L_EN_ES_CS_ET_ON_BN_NSM_MASK=L_EN_MASK|ES_CS_ET_ON_BN_NSM_MASK; | |
| const uint32_t R_AL_AN_EN_ES_CS_ET_ON_BN_NSM_MASK=R_AL_MASK|EN_AN_MASK|ES_CS_ET_ON_BN_NSM_MASK; | |
| // We scan the whole label and check both for whether it contains RTL characters | |
| // and whether it passes the BiDi Rule. | |
| // In a BiDi domain name, all labels must pass the BiDi Rule, but we might find | |
| // that a domain name is a BiDi domain name (has an RTL label) only after | |
| // processing several earlier labels. | |
| void | |
| UTS46::checkLabelBiDi(const UChar *label, int32_t labelLength, IDNAInfo &info) const { | |
| // IDNA2008 BiDi rule | |
| // Get the directionality of the first character. | |
| UChar32 c; | |
| int32_t i=0; | |
| U16_NEXT_UNSAFE(label, i, c); | |
| uint32_t firstMask=U_MASK(u_charDirection(c)); | |
| // 1. The first character must be a character with BIDI property L, R | |
| // or AL. If it has the R or AL property, it is an RTL label; if it | |
| // has the L property, it is an LTR label. | |
| if((firstMask&~L_R_AL_MASK)!=0) { | |
| info.isOkBiDi=FALSE; | |
| } | |
| // Get the directionality of the last non-NSM character. | |
| uint32_t lastMask; | |
| for(;;) { | |
| if(i>=labelLength) { | |
| lastMask=firstMask; | |
| break; | |
| } | |
| U16_PREV_UNSAFE(label, labelLength, c); | |
| UCharDirection dir=u_charDirection(c); | |
| if(dir!=U_DIR_NON_SPACING_MARK) { | |
| lastMask=U_MASK(dir); | |
| break; | |
| } | |
| } | |
| // 3. In an RTL label, the end of the label must be a character with | |
| // BIDI property R, AL, EN or AN, followed by zero or more | |
| // characters with BIDI property NSM. | |
| // 6. In an LTR label, the end of the label must be a character with | |
| // BIDI property L or EN, followed by zero or more characters with | |
| // BIDI property NSM. | |
| if( (firstMask&L_MASK)!=0 ? | |
| (lastMask&~L_EN_MASK)!=0 : | |
| (lastMask&~R_AL_EN_AN_MASK)!=0 | |
| ) { | |
| info.isOkBiDi=FALSE; | |
| } | |
| // Get the directionalities of the intervening characters. | |
| uint32_t mask=0; | |
| while(i<labelLength) { | |
| U16_NEXT_UNSAFE(label, i, c); | |
| mask|=U_MASK(u_charDirection(c)); | |
| } | |
| if(firstMask&L_MASK) { | |
| // 5. In an LTR label, only characters with the BIDI properties L, EN, | |
| // ES, CS, ET, ON, BN and NSM are allowed. | |
| if((mask&~L_EN_ES_CS_ET_ON_BN_NSM_MASK)!=0) { | |
| info.isOkBiDi=FALSE; | |
| } | |
| } else { | |
| // 2. In an RTL label, only characters with the BIDI properties R, AL, | |
| // AN, EN, ES, CS, ET, ON, BN and NSM are allowed. | |
| if((mask&~R_AL_AN_EN_ES_CS_ET_ON_BN_NSM_MASK)!=0) { | |
| info.isOkBiDi=FALSE; | |
| } | |
| // 4. In an RTL label, if an EN is present, no AN may be present, and | |
| // vice versa. | |
| if((mask&EN_AN_MASK)==EN_AN_MASK) { | |
| info.isOkBiDi=FALSE; | |
| } | |
| } | |
| // An RTL label is a label that contains at least one character of type | |
| // R, AL or AN. [...] | |
| // A "BIDI domain name" is a domain name that contains at least one RTL | |
| // label. [...] | |
| // The following rule, consisting of six conditions, applies to labels | |
| // in BIDI domain names. | |
| if(((firstMask|mask|lastMask)&R_AL_AN_MASK)!=0) { | |
| info.isBiDi=TRUE; | |
| } | |
| } | |
| // Special code for the ASCII prefix of a BiDi domain name. | |
| // The ASCII prefix is all-LTR. | |
| // IDNA2008 BiDi rule, parts relevant to ASCII labels: | |
| // 1. The first character must be a character with BIDI property L [...] | |
| // 5. In an LTR label, only characters with the BIDI properties L, EN, | |
| // ES, CS, ET, ON, BN and NSM are allowed. | |
| // 6. In an LTR label, the end of the label must be a character with | |
| // BIDI property L or EN [...] | |
| // UTF-16 version, called for mapped ASCII prefix. | |
| // Cannot contain uppercase A-Z. | |
| // s[length-1] must be the trailing dot. | |
| static UBool | |
| isASCIIOkBiDi(const UChar *s, int32_t length) { | |
| int32_t labelStart=0; | |
| for(int32_t i=0; i<length; ++i) { | |
| UChar c=s[i]; | |
| if(c==0x2e) { // dot | |
| if(i>labelStart) { | |
| c=s[i-1]; | |
| if(!(0x61<=c && c<=0x7a) && !(0x30<=c && c<=0x39)) { | |
| // Last character in the label is not an L or EN. | |
| return FALSE; | |
| } | |
| } | |
| labelStart=i+1; | |
| } else if(i==labelStart) { | |
| if(!(0x61<=c && c<=0x7a)) { | |
| // First character in the label is not an L. | |
| return FALSE; | |
| } | |
| } else { | |
| if(c<=0x20 && (c>=0x1c || (9<=c && c<=0xd))) { | |
| // Intermediate character in the label is a B, S or WS. | |
| return FALSE; | |
| } | |
| } | |
| } | |
| return TRUE; | |
| } | |
| // UTF-8 version, called for source ASCII prefix. | |
| // Can contain uppercase A-Z. | |
| // s[length-1] must be the trailing dot. | |
| static UBool | |
| isASCIIOkBiDi(const char *s, int32_t length) { | |
| int32_t labelStart=0; | |
| for(int32_t i=0; i<length; ++i) { | |
| char c=s[i]; | |
| if(c==0x2e) { // dot | |
| if(i>labelStart) { | |
| c=s[i-1]; | |
| if(!(0x61<=c && c<=0x7a) && !(0x41<=c && c<=0x5a) && !(0x30<=c && c<=0x39)) { | |
| // Last character in the label is not an L or EN. | |
| return FALSE; | |
| } | |
| } | |
| labelStart=i+1; | |
| } else if(i==labelStart) { | |
| if(!(0x61<=c && c<=0x7a) && !(0x41<=c && c<=0x5a)) { | |
| // First character in the label is not an L. | |
| return FALSE; | |
| } | |
| } else { | |
| if(c<=0x20 && (c>=0x1c || (9<=c && c<=0xd))) { | |
| // Intermediate character in the label is a B, S or WS. | |
| return FALSE; | |
| } | |
| } | |
| } | |
| return TRUE; | |
| } | |
| UBool | |
| UTS46::isLabelOkContextJ(const UChar *label, int32_t labelLength) const { | |
| // [IDNA2008-Tables] | |
| // 200C..200D ; CONTEXTJ # ZERO WIDTH NON-JOINER..ZERO WIDTH JOINER | |
| for(int32_t i=0; i<labelLength; ++i) { | |
| if(label[i]==0x200c) { | |
| // Appendix A.1. ZERO WIDTH NON-JOINER | |
| // Rule Set: | |
| // False; | |
| // If Canonical_Combining_Class(Before(cp)) .eq. Virama Then True; | |
| // If RegExpMatch((Joining_Type:{L,D})(Joining_Type:T)*\u200C | |
| // (Joining_Type:T)*(Joining_Type:{R,D})) Then True; | |
| if(i==0) { | |
| return FALSE; | |
| } | |
| UChar32 c; | |
| int32_t j=i; | |
| U16_PREV_UNSAFE(label, j, c); | |
| if(u_getCombiningClass(c)==9) { | |
| continue; | |
| } | |
| // check precontext (Joining_Type:{L,D})(Joining_Type:T)* | |
| for(;;) { | |
| UJoiningType type=(UJoiningType)u_getIntPropertyValue(c, UCHAR_JOINING_TYPE); | |
| if(type==U_JT_TRANSPARENT) { | |
| if(j==0) { | |
| return FALSE; | |
| } | |
| U16_PREV_UNSAFE(label, j, c); | |
| } else if(type==U_JT_LEFT_JOINING || type==U_JT_DUAL_JOINING) { | |
| break; // precontext fulfilled | |
| } else { | |
| return FALSE; | |
| } | |
| } | |
| // check postcontext (Joining_Type:T)*(Joining_Type:{R,D}) | |
| for(j=i+1;;) { | |
| if(j==labelLength) { | |
| return FALSE; | |
| } | |
| U16_NEXT_UNSAFE(label, j, c); | |
| UJoiningType type=(UJoiningType)u_getIntPropertyValue(c, UCHAR_JOINING_TYPE); | |
| if(type==U_JT_TRANSPARENT) { | |
| // just skip this character | |
| } else if(type==U_JT_RIGHT_JOINING || type==U_JT_DUAL_JOINING) { | |
| break; // postcontext fulfilled | |
| } else { | |
| return FALSE; | |
| } | |
| } | |
| } else if(label[i]==0x200d) { | |
| // Appendix A.2. ZERO WIDTH JOINER (U+200D) | |
| // Rule Set: | |
| // False; | |
| // If Canonical_Combining_Class(Before(cp)) .eq. Virama Then True; | |
| if(i==0) { | |
| return FALSE; | |
| } | |
| UChar32 c; | |
| int32_t j=i; | |
| U16_PREV_UNSAFE(label, j, c); | |
| if(u_getCombiningClass(c)!=9) { | |
| return FALSE; | |
| } | |
| } | |
| } | |
| return TRUE; | |
| } | |
| U_NAMESPACE_END | |
| // C API ------------------------------------------------------------------- *** | |
| U_NAMESPACE_USE | |
| U_DRAFT UIDNA * U_EXPORT2 | |
| uidna_openUTS46(uint32_t options, UErrorCode *pErrorCode) { | |
| return reinterpret_cast<UIDNA *>(IDNA::createUTS46Instance(options, *pErrorCode)); | |
| } | |
| U_DRAFT void U_EXPORT2 | |
| uidna_close(UIDNA *idna) { | |
| delete reinterpret_cast<IDNA *>(idna); | |
| } | |
| static UBool | |
| checkArgs(const void *label, int32_t length, | |
| void *dest, int32_t capacity, | |
| UIDNAInfo *pInfo, UErrorCode *pErrorCode) { | |
| if(U_FAILURE(*pErrorCode)) { | |
| return FALSE; | |
| } | |
| // sizeof(UIDNAInfo)=16 in the first API version. | |
| if(pInfo==NULL || pInfo->size<16) { | |
| *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; | |
| return FALSE; | |
| } | |
| if( (label==NULL ? length!=0 : length<-1) || | |
| (dest==NULL ? capacity!=0 : capacity<0) || | |
| (dest==label && label!=NULL) | |
| ) { | |
| *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; | |
| return FALSE; | |
| } | |
| // Set all *pInfo bytes to 0 except for the size field itself. | |
| uprv_memset(&pInfo->size+1, 0, pInfo->size-sizeof(pInfo->size)); | |
| return TRUE; | |
| } | |
| static void | |
| idnaInfoToStruct(IDNAInfo &info, UIDNAInfo *pInfo) { | |
| pInfo->isTransitionalDifferent=info.isTransitionalDifferent(); | |
| pInfo->errors=info.getErrors(); | |
| } | |
| U_DRAFT int32_t U_EXPORT2 | |
| uidna_labelToASCII(const UIDNA *idna, | |
| const UChar *label, int32_t length, | |
| UChar *dest, int32_t capacity, | |
| UIDNAInfo *pInfo, UErrorCode *pErrorCode) { | |
| if(!checkArgs(label, length, dest, capacity, pInfo, pErrorCode)) { | |
| return 0; | |
| } | |
| UnicodeString src((UBool)(length<0), label, length); | |
| UnicodeString destString(dest, 0, capacity); | |
| IDNAInfo info; | |
| reinterpret_cast<const IDNA *>(idna)->labelToASCII(src, destString, info, *pErrorCode); | |
| idnaInfoToStruct(info, pInfo); | |
| return destString.extract(dest, capacity, *pErrorCode); | |
| } | |
| U_DRAFT int32_t U_EXPORT2 | |
| uidna_labelToUnicode(const UIDNA *idna, | |
| const UChar *label, int32_t length, | |
| UChar *dest, int32_t capacity, | |
| UIDNAInfo *pInfo, UErrorCode *pErrorCode) { | |
| if(!checkArgs(label, length, dest, capacity, pInfo, pErrorCode)) { | |
| return 0; | |
| } | |
| UnicodeString src((UBool)(length<0), label, length); | |
| UnicodeString destString(dest, 0, capacity); | |
| IDNAInfo info; | |
| reinterpret_cast<const IDNA *>(idna)->labelToUnicode(src, destString, info, *pErrorCode); | |
| idnaInfoToStruct(info, pInfo); | |
| return destString.extract(dest, capacity, *pErrorCode); | |
| } | |
| U_DRAFT int32_t U_EXPORT2 | |
| uidna_nameToASCII(const UIDNA *idna, | |
| const UChar *name, int32_t length, | |
| UChar *dest, int32_t capacity, | |
| UIDNAInfo *pInfo, UErrorCode *pErrorCode) { | |
| if(!checkArgs(name, length, dest, capacity, pInfo, pErrorCode)) { | |
| return 0; | |
| } | |
| UnicodeString src((UBool)(length<0), name, length); | |
| UnicodeString destString(dest, 0, capacity); | |
| IDNAInfo info; | |
| reinterpret_cast<const IDNA *>(idna)->nameToASCII(src, destString, info, *pErrorCode); | |
| idnaInfoToStruct(info, pInfo); | |
| return destString.extract(dest, capacity, *pErrorCode); | |
| } | |
| U_DRAFT int32_t U_EXPORT2 | |
| uidna_nameToUnicode(const UIDNA *idna, | |
| const UChar *name, int32_t length, | |
| UChar *dest, int32_t capacity, | |
| UIDNAInfo *pInfo, UErrorCode *pErrorCode) { | |
| if(!checkArgs(name, length, dest, capacity, pInfo, pErrorCode)) { | |
| return 0; | |
| } | |
| UnicodeString src((UBool)(length<0), name, length); | |
| UnicodeString destString(dest, 0, capacity); | |
| IDNAInfo info; | |
| reinterpret_cast<const IDNA *>(idna)->nameToUnicode(src, destString, info, *pErrorCode); | |
| idnaInfoToStruct(info, pInfo); | |
| return destString.extract(dest, capacity, *pErrorCode); | |
| } | |
| U_DRAFT int32_t U_EXPORT2 | |
| uidna_labelToASCII_UTF8(const UIDNA *idna, | |
| const char *label, int32_t length, | |
| char *dest, int32_t capacity, | |
| UIDNAInfo *pInfo, UErrorCode *pErrorCode) { | |
| if(!checkArgs(label, length, dest, capacity, pInfo, pErrorCode)) { | |
| return 0; | |
| } | |
| StringPiece src(label, length<0 ? uprv_strlen(label) : length); | |
| CheckedArrayByteSink sink(dest, capacity); | |
| IDNAInfo info; | |
| reinterpret_cast<const IDNA *>(idna)->labelToASCII_UTF8(src, sink, info, *pErrorCode); | |
| idnaInfoToStruct(info, pInfo); | |
| return u_terminateChars(dest, capacity, sink.NumberOfBytesAppended(), pErrorCode); | |
| } | |
| U_DRAFT int32_t U_EXPORT2 | |
| uidna_labelToUnicodeUTF8(const UIDNA *idna, | |
| const char *label, int32_t length, | |
| char *dest, int32_t capacity, | |
| UIDNAInfo *pInfo, UErrorCode *pErrorCode) { | |
| if(!checkArgs(label, length, dest, capacity, pInfo, pErrorCode)) { | |
| return 0; | |
| } | |
| StringPiece src(label, length<0 ? uprv_strlen(label) : length); | |
| CheckedArrayByteSink sink(dest, capacity); | |
| IDNAInfo info; | |
| reinterpret_cast<const IDNA *>(idna)->labelToUnicodeUTF8(src, sink, info, *pErrorCode); | |
| idnaInfoToStruct(info, pInfo); | |
| return u_terminateChars(dest, capacity, sink.NumberOfBytesAppended(), pErrorCode); | |
| } | |
| U_DRAFT int32_t U_EXPORT2 | |
| uidna_nameToASCII_UTF8(const UIDNA *idna, | |
| const char *name, int32_t length, | |
| char *dest, int32_t capacity, | |
| UIDNAInfo *pInfo, UErrorCode *pErrorCode) { | |
| if(!checkArgs(name, length, dest, capacity, pInfo, pErrorCode)) { | |
| return 0; | |
| } | |
| StringPiece src(name, length<0 ? uprv_strlen(name) : length); | |
| CheckedArrayByteSink sink(dest, capacity); | |
| IDNAInfo info; | |
| reinterpret_cast<const IDNA *>(idna)->nameToASCII_UTF8(src, sink, info, *pErrorCode); | |
| idnaInfoToStruct(info, pInfo); | |
| return u_terminateChars(dest, capacity, sink.NumberOfBytesAppended(), pErrorCode); | |
| } | |
| U_DRAFT int32_t U_EXPORT2 | |
| uidna_nameToUnicodeUTF8(const UIDNA *idna, | |
| const char *name, int32_t length, | |
| char *dest, int32_t capacity, | |
| UIDNAInfo *pInfo, UErrorCode *pErrorCode) { | |
| if(!checkArgs(name, length, dest, capacity, pInfo, pErrorCode)) { | |
| return 0; | |
| } | |
| StringPiece src(name, length<0 ? uprv_strlen(name) : length); | |
| CheckedArrayByteSink sink(dest, capacity); | |
| IDNAInfo info; | |
| reinterpret_cast<const IDNA *>(idna)->nameToUnicodeUTF8(src, sink, info, *pErrorCode); | |
| idnaInfoToStruct(info, pInfo); | |
| return u_terminateChars(dest, capacity, sink.NumberOfBytesAppended(), pErrorCode); | |
| } | |
| #endif // UCONFIG_NO_IDNA |