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godot/thirdparty/icu4c/common/uts46.cpp
bruvzg b64df2bf74
Update HarfBuzz, ICU and FreeType 
HarfBuzz: Update to version 7.3.0
ICU4C: Update to version 73.1
FreeType: Update to version 2.13.0
2023-05-23 03:26:16 +03:00

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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
* Copyright (C) 2010-2015, International Business Machines
* Corporation and others. All Rights Reserved.
*******************************************************************************
* file name: uts46.cpp
* encoding: UTF-8
* 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/uscript.h"
#include "unicode/ustring.h"
#include "unicode/utf16.h"
#include "cmemory.h"
#include "cstring.h"
#include "punycode.h"
#include "ubidi_props.h"
#include "ustr_imp.h"
// 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 char16_t *s=dest.getBuffer();
const char16_t *limit=s+dest.length();
while(s<limit) {
if(*s++>0x7f) {
return false;
}
}
return true;
}
static UBool
isASCIIOkBiDi(const char16_t *s, int32_t length);
static UBool
isASCIIOkBiDi(const char *s, int32_t length);
// IDNA class default implementations -------------------------------------- ***
IDNA::~IDNA() {}
void
IDNA::labelToASCII_UTF8(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(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(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(StringPiece name, ByteSink &dest,
IDNAInfo &info, UErrorCode &errorCode) const {
if(U_SUCCESS(errorCode)) {
UnicodeString destString;
nameToUnicode(UnicodeString::fromUTF8(name), destString,
info, errorCode).toUTF8(dest);
}
}
// 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 override;
virtual UnicodeString &
labelToUnicode(const UnicodeString &label, UnicodeString &dest,
IDNAInfo &info, UErrorCode &errorCode) const override;
virtual UnicodeString &
nameToASCII(const UnicodeString &name, UnicodeString &dest,
IDNAInfo &info, UErrorCode &errorCode) const override;
virtual UnicodeString &
nameToUnicode(const UnicodeString &name, UnicodeString &dest,
IDNAInfo &info, UErrorCode &errorCode) const override;
virtual void
labelToASCII_UTF8(StringPiece label, ByteSink &dest,
IDNAInfo &info, UErrorCode &errorCode) const override;
virtual void
labelToUnicodeUTF8(StringPiece label, ByteSink &dest,
IDNAInfo &info, UErrorCode &errorCode) const override;
virtual void
nameToASCII_UTF8(StringPiece name, ByteSink &dest,
IDNAInfo &info, UErrorCode &errorCode) const override;
virtual void
nameToUnicodeUTF8(StringPiece name, ByteSink &dest,
IDNAInfo &info, UErrorCode &errorCode) const override;
private:
UnicodeString &
process(const UnicodeString &src,
UBool isLabel, UBool toASCII,
UnicodeString &dest,
IDNAInfo &info, UErrorCode &errorCode) const;
void
processUTF8(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, UErrorCode &errorCode) const;
void
checkLabelBiDi(const char16_t *label, int32_t labelLength, IDNAInfo &info) const;
UBool
isLabelOkContextJ(const char16_t *label, int32_t labelLength) const;
void
checkLabelContextO(const char16_t *label, int32_t labelLength, IDNAInfo &info) 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==nullptr) {
errorCode=U_MEMORY_ALLOCATION_ERROR;
} else if(U_FAILURE(errorCode)) {
delete idna;
idna=nullptr;
}
return idna;
} else {
return nullptr;
}
}
// UTS46 implementation ---------------------------------------------------- ***
UTS46::UTS46(uint32_t opt, UErrorCode &errorCode)
: uts46Norm2(*Normalizer2::getInstance(nullptr, "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(StringPiece label, ByteSink &dest,
IDNAInfo &info, UErrorCode &errorCode) const {
processUTF8(label, true, true, dest, info, errorCode);
}
void
UTS46::labelToUnicodeUTF8(StringPiece label, ByteSink &dest,
IDNAInfo &info, UErrorCode &errorCode) const {
processUTF8(label, true, false, dest, info, errorCode);
}
void
UTS46::nameToASCII_UTF8(StringPiece name, ByteSink &dest,
IDNAInfo &info, UErrorCode &errorCode) const {
processUTF8(name, false, true, dest, info, errorCode);
}
void
UTS46::nameToUnicodeUTF8(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 char16_t *srcArray=src.getBuffer();
if(&dest==&src || srcArray==nullptr) {
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) {
info.errors|=UIDNA_ERROR_EMPTY_LABEL;
return dest;
}
char16_t *destArray=dest.getBuffer(srcLength);
if(destArray==nullptr) {
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;
}
char16_t 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(i==labelStart) {
info.labelErrors|=UIDNA_ERROR_EMPTY_LABEL;
}
if(toASCII && (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(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==nullptr && srcLength!=0) {
errorCode=U_ILLEGAL_ARGUMENT_ERROR;
return;
}
// Arguments are fine, reset output values.
info.reset();
if(srcLength==0) {
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, UPRV_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(i==labelStart) {
info.labelErrors|=UIDNA_ERROR_EMPTY_LABEL;
}
if(toASCII && (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 char16_t *destArray=dest.getBuffer();
int32_t destLength=dest.length();
int32_t labelLimit=labelStart;
while(labelLimit<destLength) {
char16_t 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;
continue;
} else if(c<0xdf) {
// pass
} else if(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();
// All deviation characters have been mapped, no need to check for them again.
doMapDevChars=false;
// Do not increment labelLimit in case c was removed.
continue;
}
} else if(U16_IS_SURROGATE(c)) {
if(U16_IS_SURROGATE_LEAD(c) ?
(labelLimit+1)==destLength || !U16_IS_TRAIL(destArray[labelLimit+1]) :
labelLimit==labelStart || !U16_IS_LEAD(destArray[labelLimit-1])) {
// Map an unpaired surrogate to U+FFFD before normalization so that when
// that removes characters we do not turn two unpaired ones into a pair.
info.labelErrors|=UIDNA_ERROR_DISALLOWED;
dest.setCharAt(labelLimit, 0xfffd);
destArray=dest.getBuffer();
}
}
++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 {
if(U_FAILURE(errorCode)) {
return 0;
}
int32_t length=dest.length();
char16_t *s=dest.getBuffer(dest[mappingStart]==0xdf ? length+1 : length);
if(s==nullptr) {
errorCode=U_MEMORY_ALLOCATION_ERROR;
return length;
}
int32_t capacity=dest.getCapacity();
UBool didMapDevChars=false;
int32_t readIndex=mappingStart, writeIndex=mappingStart;
do {
char16_t 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==nullptr) {
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);
if(dest.isBogus()) {
errorCode=U_MEMORY_ALLOCATION_ERROR;
}
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, UErrorCode &errorCode) {
if(U_FAILURE(errorCode)) {
return 0;
}
if(&label!=&dest) {
dest.replace(destLabelStart, destLabelLength, label);
if(dest.isBogus()) {
errorCode=U_MEMORY_ALLOCATION_ERROR;
return 0;
}
}
return labelLength;
}
int32_t
UTS46::processLabel(UnicodeString &dest,
int32_t labelStart, int32_t labelLength,
UBool toASCII,
IDNAInfo &info, UErrorCode &errorCode) const {
if(U_FAILURE(errorCode)) {
return 0;
}
UnicodeString fromPunycode;
UnicodeString *labelString;
const char16_t *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.
// In IDNA2008, labels like "xn--" (decodes to an empty string) and
// "xn--ASCII-" (decodes to just "ASCII") fail the round-trip validation from
// comparing the ToUnicode input with the back-to-ToASCII output.
// They are alternate encodings of the respective ASCII labels.
// Ignore "xn---" here: It will fail Punycode.decode() which logically comes before
// the round-trip verification.
if(labelLength==4 || (labelLength>5 && label[labelLength-1]==u'-')) {
info.labelErrors|=UIDNA_ERROR_INVALID_ACE_LABEL;
return markBadACELabel(dest, labelStart, labelLength, toASCII, info, errorCode);
}
wasPunycode=true;
char16_t *unicodeBuffer=fromPunycode.getBuffer(-1); // capacity==-1: most labels should fit
if(unicodeBuffer==nullptr) {
// 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(),
nullptr, &punycodeErrorCode);
if(punycodeErrorCode==U_BUFFER_OVERFLOW_ERROR) {
fromPunycode.releaseBuffer(0);
unicodeBuffer=fromPunycode.getBuffer(unicodeLength);
if(unicodeBuffer==nullptr) {
errorCode=U_MEMORY_ALLOCATION_ERROR;
return labelLength;
}
punycodeErrorCode=U_ZERO_ERROR;
unicodeLength=u_strFromPunycode(label+4, labelLength-4,
unicodeBuffer, fromPunycode.getCapacity(),
nullptr, &punycodeErrorCode);
}
fromPunycode.releaseBuffer(unicodeLength);
if(U_FAILURE(punycodeErrorCode)) {
info.labelErrors|=UIDNA_ERROR_PUNYCODE;
return markBadACELabel(dest, labelStart, labelLength, toASCII, info, errorCode);
}
// 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, errorCode);
}
labelString=&fromPunycode;
label=fromPunycode.getBuffer();
labelStart=0;
labelLength=fromPunycode.length();
} else {
wasPunycode=false;
labelString=&dest;
}
// Validity check
if(labelLength==0) {
info.labelErrors|=UIDNA_ERROR_EMPTY_LABEL;
return replaceLabel(dest, destLabelStart, destLabelLength,
*labelString, labelLength, errorCode);
}
// 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.
char16_t *s=(char16_t *)label;
const char16_t *limit=label+labelLength;
char16_t 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 {
char16_t 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, (char16_t)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((options&UIDNA_CHECK_CONTEXTO)!=0 && oredChars>=0xb7) {
checkLabelContextO(label, labelLength, info);
}
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;
char16_t *buffer=punycode.getBuffer(63); // 63==maximum DNS label length
if(buffer==nullptr) {
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,
nullptr, &errorCode);
if(errorCode==U_BUFFER_OVERFLOW_ERROR) {
errorCode=U_ZERO_ERROR;
punycode.releaseBuffer(4);
buffer=punycode.getBuffer(4+punycodeLength);
if(buffer==nullptr) {
errorCode=U_MEMORY_ALLOCATION_ERROR;
return destLabelLength;
}
punycodeLength=u_strToPunycode(label, labelLength,
buffer+4, punycode.getCapacity()-4,
nullptr, &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, errorCode);
} 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, errorCode);
}
}
return replaceLabel(dest, destLabelStart, destLabelLength,
*labelString, labelLength, errorCode);
}
// 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, UErrorCode &errorCode) const {
if(U_FAILURE(errorCode)) {
return 0;
}
UBool disallowNonLDHDot=(options&UIDNA_USE_STD3_RULES)!=0;
UBool isASCII=true;
UBool onlyLDH=true;
const char16_t *label=dest.getBuffer()+labelStart;
const char16_t *limit=label+labelLength;
// Start after the initial "xn--".
// Ok to cast away const because we own the UnicodeString.
for(char16_t *s=const_cast<char16_t *>(label+4); s<limit; ++s) {
char16_t 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;
}
}
if(onlyLDH) {
dest.insert(labelStart+labelLength, (char16_t)0xfffd);
if(dest.isBogus()) {
errorCode=U_MEMORY_ALLOCATION_ERROR;
return 0;
}
++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 char16_t *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;
}
// Add the directionalities of the intervening characters.
uint32_t mask=firstMask|lastMask;
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((mask&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 char16_t *s, int32_t length) {
int32_t labelStart=0;
for(int32_t i=0; i<length; ++i) {
char16_t 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 char16_t *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(uts46Norm2.getCombiningClass(c)==9) {
continue;
}
// check precontext (Joining_Type:{L,D})(Joining_Type:T)*
for(;;) {
UJoiningType type=ubidi_getJoiningType(c);
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=ubidi_getJoiningType(c);
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(uts46Norm2.getCombiningClass(c)!=9) {
return false;
}
}
}
return true;
}
void
UTS46::checkLabelContextO(const char16_t *label, int32_t labelLength, IDNAInfo &info) const {
int32_t labelEnd=labelLength-1; // inclusive
int32_t arabicDigits=0; // -1 for 066x, +1 for 06Fx
for(int32_t i=0; i<=labelEnd; ++i) {
UChar32 c=label[i];
if(c<0xb7) {
// ASCII fastpath
} else if(c<=0x6f9) {
if(c==0xb7) {
// Appendix A.3. MIDDLE DOT (U+00B7)
// Rule Set:
// False;
// If Before(cp) .eq. U+006C And
// After(cp) .eq. U+006C Then True;
if(!(0<i && label[i-1]==0x6c &&
i<labelEnd && label[i+1]==0x6c)) {
info.labelErrors|=UIDNA_ERROR_CONTEXTO_PUNCTUATION;
}
} else if(c==0x375) {
// Appendix A.4. GREEK LOWER NUMERAL SIGN (KERAIA) (U+0375)
// Rule Set:
// False;
// If Script(After(cp)) .eq. Greek Then True;
UScriptCode script=USCRIPT_INVALID_CODE;
if(i<labelEnd) {
UErrorCode errorCode=U_ZERO_ERROR;
int32_t j=i+1;
U16_NEXT(label, j, labelLength, c);
script=uscript_getScript(c, &errorCode);
}
if(script!=USCRIPT_GREEK) {
info.labelErrors|=UIDNA_ERROR_CONTEXTO_PUNCTUATION;
}
} else if(c==0x5f3 || c==0x5f4) {
// Appendix A.5. HEBREW PUNCTUATION GERESH (U+05F3)
// Rule Set:
// False;
// If Script(Before(cp)) .eq. Hebrew Then True;
//
// Appendix A.6. HEBREW PUNCTUATION GERSHAYIM (U+05F4)
// Rule Set:
// False;
// If Script(Before(cp)) .eq. Hebrew Then True;
UScriptCode script=USCRIPT_INVALID_CODE;
if(0<i) {
UErrorCode errorCode=U_ZERO_ERROR;
int32_t j=i;
U16_PREV(label, 0, j, c);
script=uscript_getScript(c, &errorCode);
}
if(script!=USCRIPT_HEBREW) {
info.labelErrors|=UIDNA_ERROR_CONTEXTO_PUNCTUATION;
}
} else if(0x660<=c /* && c<=0x6f9 */) {
// Appendix A.8. ARABIC-INDIC DIGITS (0660..0669)
// Rule Set:
// True;
// For All Characters:
// If cp .in. 06F0..06F9 Then False;
// End For;
//
// Appendix A.9. EXTENDED ARABIC-INDIC DIGITS (06F0..06F9)
// Rule Set:
// True;
// For All Characters:
// If cp .in. 0660..0669 Then False;
// End For;
if(c<=0x669) {
if(arabicDigits>0) {
info.labelErrors|=UIDNA_ERROR_CONTEXTO_DIGITS;
}
arabicDigits=-1;
} else if(0x6f0<=c) {
if(arabicDigits<0) {
info.labelErrors|=UIDNA_ERROR_CONTEXTO_DIGITS;
}
arabicDigits=1;
}
}
} else if(c==0x30fb) {
// Appendix A.7. KATAKANA MIDDLE DOT (U+30FB)
// Rule Set:
// False;
// For All Characters:
// If Script(cp) .in. {Hiragana, Katakana, Han} Then True;
// End For;
UErrorCode errorCode=U_ZERO_ERROR;
for(int j=0;;) {
if(j>labelEnd) {
info.labelErrors|=UIDNA_ERROR_CONTEXTO_PUNCTUATION;
break;
}
U16_NEXT(label, j, labelLength, c);
UScriptCode script=uscript_getScript(c, &errorCode);
if(script==USCRIPT_HIRAGANA || script==USCRIPT_KATAKANA || script==USCRIPT_HAN) {
break;
}
}
}
}
}
U_NAMESPACE_END
// C API ------------------------------------------------------------------- ***
U_NAMESPACE_USE
U_CAPI UIDNA * U_EXPORT2
uidna_openUTS46(uint32_t options, UErrorCode *pErrorCode) {
return reinterpret_cast<UIDNA *>(IDNA::createUTS46Instance(options, *pErrorCode));
}
U_CAPI 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==nullptr || pInfo->size<16) {
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
return false;
}
if( (label==nullptr ? length!=0 : length<-1) ||
(dest==nullptr ? capacity!=0 : capacity<0) ||
(dest==label && label!=nullptr)
) {
*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_CAPI int32_t U_EXPORT2
uidna_labelToASCII(const UIDNA *idna,
const char16_t *label, int32_t length,
char16_t *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_CAPI int32_t U_EXPORT2
uidna_labelToUnicode(const UIDNA *idna,
const char16_t *label, int32_t length,
char16_t *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_CAPI int32_t U_EXPORT2
uidna_nameToASCII(const UIDNA *idna,
const char16_t *name, int32_t length,
char16_t *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_CAPI int32_t U_EXPORT2
uidna_nameToUnicode(const UIDNA *idna,
const char16_t *name, int32_t length,
char16_t *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_CAPI 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 ? static_cast<int32_t>(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_CAPI 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 ? static_cast<int32_t>(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_CAPI 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 ? static_cast<int32_t>(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_CAPI 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 ? static_cast<int32_t>(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
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