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idnaref.cpp
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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
*
* Copyright (C) 2003-2011, International Business Machines
* Corporation and others. All Rights Reserved.
*
*******************************************************************************
* file name: idnaref.cpp
* encoding: UTF-8
* tab size: 8 (not used)
* indentation:4
*
* created on: 2003feb1
* created by: Ram Viswanadha
*/
#include "unicode/utypes.h"
#if !UCONFIG_NO_IDNA && !UCONFIG_NO_TRANSLITERATION
#include "idnaref.h"
#include "punyref.h"
#include "ustr_imp.h"
#include "cmemory.h"
#include "sprpimpl.h"
#include "nptrans.h"
#include "testidna.h"
#include "punycode.h"
#include "unicode/ustring.h"
/* it is official IDNA ACE Prefix is "xn--" */
static const char16_t ACE_PREFIX[] ={ 0x0078,0x006E,0x002d,0x002d } ;
#define ACE_PREFIX_LENGTH 4
#define MAX_LABEL_LENGTH 63
#define HYPHEN 0x002D
/* The Max length of the labels should not be more than 64 */
#define MAX_LABEL_BUFFER_SIZE 100
#define MAX_IDN_BUFFER_SIZE 300
#define CAPITAL_A 0x0041
#define CAPITAL_Z 0x005A
#define LOWER_CASE_DELTA 0x0020
#define FULL_STOP 0x002E
inline static UBool
startsWithPrefix(const char16_t* 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(u_tolower(src[i]) != ACE_PREFIX[i]){
startsWithPrefix = false;
}
}
return startsWithPrefix;
}
inline static char16_t
toASCIILower(char16_t ch){
if(CAPITAL_A <= ch && ch <= CAPITAL_Z){
return ch + LOWER_CASE_DELTA;
}
return ch;
}
inline static int32_t
compareCaseInsensitiveASCII(const char16_t* s1, int32_t s1Len,
const char16_t* s2, int32_t s2Len){
if(s1Len != s2Len){
return (s1Len > s2Len) ? s1Len : s2Len;
}
char16_t 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 == s1Len) {
return 0;
}
c1 = s1[i];
c2 = s2[i];
/* Case-insensitive comparison */
if(c1!=c2) {
rc = static_cast<int32_t>(toASCIILower(c1)) - static_cast<int32_t>(toASCIILower(c2));
if(rc!=0) {
return rc;
}
}
}
}
static UErrorCode getError(enum punycode_status status){
switch(status){
case punycode_success:
return U_ZERO_ERROR;
case punycode_bad_input: /* Input is invalid. */
return U_INVALID_CHAR_FOUND;
case punycode_big_output: /* Output would exceed the space provided. */
return U_BUFFER_OVERFLOW_ERROR;
case punycode_overflow : /* Input requires wider integers to process. */
return U_INDEX_OUTOFBOUNDS_ERROR;
default:
return U_INTERNAL_PROGRAM_ERROR;
}
}
static inline int32_t convertASCIIToUChars(const char* src,char16_t* dest, int32_t length){
int i;
for(i=0;i<length;i++){
dest[i] = src[i];
}
return i;
}
static inline int32_t convertUCharsToASCII(const char16_t* src,char* dest, int32_t length){
int i;
for(i=0;i<length;i++){
dest[i] = static_cast<char>(src[i]);
}
return i;
}
// wrapper around the reference Punycode implementation
static int32_t convertToPuny(const char16_t* src, int32_t srcLength,
char16_t* dest, int32_t destCapacity,
UErrorCode& status){
uint32_t b1Stack[MAX_LABEL_BUFFER_SIZE];
int32_t b1Len = 0, b1Capacity = MAX_LABEL_BUFFER_SIZE;
uint32_t* b1 = b1Stack;
char b2Stack[MAX_LABEL_BUFFER_SIZE];
char* b2 = b2Stack;
int32_t b2Len =MAX_LABEL_BUFFER_SIZE ;
punycode_status error;
unsigned char* caseFlags = nullptr;
u_strToUTF32(reinterpret_cast<UChar32*>(b1), b1Capacity, &b1Len, src, srcLength, &status);
if(status == U_BUFFER_OVERFLOW_ERROR){
// redo processing of string
/* we do not have enough room so grow the buffer*/
b1 = static_cast<uint32_t*>(uprv_malloc(b1Len * sizeof(uint32_t)));
if(b1==nullptr){
status = U_MEMORY_ALLOCATION_ERROR;
goto CLEANUP;
}
status = U_ZERO_ERROR; // reset error
u_strToUTF32(reinterpret_cast<UChar32*>(b1), b1Len, &b1Len, src, srcLength, &status);
}
if(U_FAILURE(status)){
goto CLEANUP;
}
//caseFlags = (unsigned char*) uprv_malloc(b1Len *sizeof(unsigned char));
error = punycode_encode(b1Len, b1, caseFlags, reinterpret_cast<uint32_t*>(&b2Len), b2);
status = getError(error);
if(status == U_BUFFER_OVERFLOW_ERROR){
/* we do not have enough room so grow the buffer*/
b2 = static_cast<char*>(uprv_malloc(b2Len * sizeof(char)));
if(b2==nullptr){
status = U_MEMORY_ALLOCATION_ERROR;
goto CLEANUP;
}
status = U_ZERO_ERROR; // reset error
punycode_status error = punycode_encode(b1Len, b1, caseFlags, reinterpret_cast<uint32_t*>(&b2Len), b2);
status = getError(error);
}
if(U_FAILURE(status)){
goto CLEANUP;
}
if(b2Len < destCapacity){
convertASCIIToUChars(b2,dest,b2Len);
}else{
status =U_BUFFER_OVERFLOW_ERROR;
}
CLEANUP:
if(b1Stack != b1){
uprv_free(b1);
}
if(b2Stack != b2){
uprv_free(b2);
}
uprv_free(caseFlags);
return b2Len;
}
static NamePrepTransform* getInstance(UErrorCode& status){
TestIDNA *thisTest = dynamic_cast<TestIDNA *>(IntlTest::gTest);
if (thisTest == nullptr && U_SUCCESS(status)) {
status = U_INTERNAL_PROGRAM_ERROR;
}
if (U_FAILURE(status)) return nullptr;
return thisTest->getInstance(status);
}
static int32_t convertFromPuny( const char16_t* src, int32_t srcLength,
char16_t* dest, int32_t destCapacity,
UErrorCode& status){
char b1Stack[MAX_LABEL_BUFFER_SIZE];
char* b1 = b1Stack;
int32_t destLen =0;
convertUCharsToASCII(src, b1,srcLength);
uint32_t b2Stack[MAX_LABEL_BUFFER_SIZE];
uint32_t* b2 = b2Stack;
int32_t b2Len =MAX_LABEL_BUFFER_SIZE;
unsigned char* caseFlags = nullptr; //(unsigned char*) uprv_malloc(srcLength * sizeof(unsigned char*));
punycode_status error = punycode_decode(srcLength, b1, reinterpret_cast<uint32_t*>(&b2Len), b2, caseFlags);
status = getError(error);
if(status == U_BUFFER_OVERFLOW_ERROR){
b2 = static_cast<uint32_t*>(uprv_malloc(b2Len * sizeof(uint32_t)));
if(b2 == nullptr){
status = U_MEMORY_ALLOCATION_ERROR;
goto CLEANUP;
}
error = punycode_decode(srcLength, b1, reinterpret_cast<uint32_t*>(&b2Len), b2, caseFlags);
status = getError(error);
}
if(U_FAILURE(status)){
goto CLEANUP;
}
u_strFromUTF32(dest, destCapacity, &destLen, reinterpret_cast<UChar32*>(b2), b2Len, &status);
CLEANUP:
if(b1Stack != b1){
uprv_free(b1);
}
if(b2Stack != b2){
uprv_free(b2);
}
uprv_free(caseFlags);
return destLen;
}
U_CFUNC int32_t U_EXPORT2
idnaref_toASCII(const char16_t* src, int32_t srcLength,
char16_t* dest, int32_t destCapacity,
int32_t options,
UParseError* parseError,
UErrorCode* status){
if(status == nullptr || U_FAILURE(*status)){
return 0;
}
if((src == nullptr) || (srcLength < -1) || (destCapacity<0) || (!dest && destCapacity > 0)){
*status = U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
char16_t b1Stack[MAX_LABEL_BUFFER_SIZE], b2Stack[MAX_LABEL_BUFFER_SIZE];
//initialize pointers to stack buffers
char16_t *b1 = b1Stack, *b2 = b2Stack;
int32_t b1Len=0, b2Len=0,
b1Capacity = MAX_LABEL_BUFFER_SIZE,
b2Capacity = MAX_LABEL_BUFFER_SIZE ,
reqLength=0;
//get the options
UBool allowUnassigned = (options & IDNAREF_ALLOW_UNASSIGNED) != 0;
UBool useSTD3ASCIIRules = (options & IDNAREF_USE_STD3_RULES) != 0;
UBool* caseFlags = nullptr;
// assume the source contains all ascii codepoints
UBool srcIsASCII = true;
// assume the source contains all LDH codepoints
UBool srcIsLDH = true;
int32_t j=0;
if(srcLength == -1){
srcLength = u_strlen(src);
}
// step 1
for( j=0;j<srcLength;j++){
if(src[j] > 0x7F){
srcIsASCII = false;
}
b1[b1Len++] = src[j];
}
NamePrepTransform* prep = getInstance(*status);
if(U_FAILURE(*status)){
goto CLEANUP;
}
// step 2 is performed only if the source contains non ASCII
if (!srcIsASCII) {
b1Len = prep->process(src,srcLength,b1, b1Capacity,allowUnassigned,parseError,*status);
if(*status == U_BUFFER_OVERFLOW_ERROR){
// redo processing of string
/* we do not have enough room so grow the buffer*/
b1 = (char16_t*) uprv_malloc(b1Len * U_SIZEOF_UCHAR);
if(b1==nullptr){
*status = U_MEMORY_ALLOCATION_ERROR;
goto CLEANUP;
}
*status = U_ZERO_ERROR; // reset error
b1Len = prep->process(src,srcLength,b1, b1Len,allowUnassigned, parseError, *status);
}
// error bail out
if(U_FAILURE(*status)){
goto CLEANUP;
}
}
if(b1Len == 0){
*status = U_IDNA_ZERO_LENGTH_LABEL_ERROR;
goto CLEANUP;
}
srcIsASCII = true;
// step 3 & 4
for( j=0;j<b1Len;j++){
if(b1[j] > 0x7F){// check if output of usprep_prepare is all ASCII
srcIsASCII = false;
}else if(prep->isLDHChar(b1[j])==false){ // if the char is in ASCII range verify that it is an LDH character{
srcIsLDH = false;
}
}
if(useSTD3ASCIIRules == true){
// verify 3a and 3b
if( srcIsLDH == false /* source contains some non-LDH characters */
|| b1[0] == HYPHEN || b1[b1Len-1] == HYPHEN){
*status = U_IDNA_STD3_ASCII_RULES_ERROR;
goto CLEANUP;
}
}
if(srcIsASCII){
if(b1Len <= destCapacity){
u_memmove(dest, b1, b1Len);
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
//caseFlags = (UBool*) uprv_malloc(b1Len * sizeof(UBool));
b2Len = convertToPuny(b1,b1Len, b2,b2Capacity,*status);
//b2Len = u_strToPunycode(b2,b2Capacity,b1,b1Len, caseFlags, status);
if(*status == U_BUFFER_OVERFLOW_ERROR){
// redo processing of string
/* we do not have enough room so grow the buffer*/
b2 = (char16_t*) uprv_malloc(b2Len * U_SIZEOF_UCHAR);
if(b2 == nullptr){
*status = U_MEMORY_ALLOCATION_ERROR;
goto CLEANUP;
}
*status = U_ZERO_ERROR; // reset error
b2Len = convertToPuny(b1, b1Len, b2, b2Len, *status);
//b2Len = u_strToPunycode(b2,b2Len,b1,b1Len, caseFlags, status);
}
//error bail out
if(U_FAILURE(*status)){
goto CLEANUP;
}
reqLength = b2Len+ACE_PREFIX_LENGTH;
if(reqLength > destCapacity){
*status = U_BUFFER_OVERFLOW_ERROR;
goto CLEANUP;
}
//Step 7: prepend the ACE prefix
u_memcpy(dest, ACE_PREFIX, ACE_PREFIX_LENGTH);
//Step 6: copy the contents in b2 into dest
u_memcpy(dest+ACE_PREFIX_LENGTH, b2, b2Len);
}else{
*status = U_IDNA_ACE_PREFIX_ERROR;
goto CLEANUP;
}
}
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);
// delete prep;
return u_terminateUChars(dest, destCapacity, reqLength, status);
}
U_CFUNC int32_t U_EXPORT2
idnaref_toUnicode(const char16_t* src, int32_t srcLength,
char16_t* dest, int32_t destCapacity,
int32_t options,
UParseError* parseError,
UErrorCode* status){
if(status == nullptr || U_FAILURE(*status)){
return 0;
}
if((src == nullptr) || (srcLength < -1) || (destCapacity<0) || (!dest && destCapacity > 0)){
*status = U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
char16_t b1Stack[MAX_LABEL_BUFFER_SIZE], b2Stack[MAX_LABEL_BUFFER_SIZE], b3Stack[MAX_LABEL_BUFFER_SIZE];
//initialize pointers to stack buffers
char16_t *b1 = b1Stack, *b2 = b2Stack, *b1Prime=nullptr, *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;
// UParseError parseError;
NamePrepTransform* prep = getInstance(*status);
b1Len = 0;
UBool* caseFlags = nullptr;
//get the options
UBool allowUnassigned = (options & IDNAREF_ALLOW_UNASSIGNED) != 0;
UBool useSTD3ASCIIRules = (options & IDNAREF_USE_STD3_RULES) != 0;
UBool srcIsASCII = true;
UBool srcIsLDH = true;
int32_t failPos =0;
if(U_FAILURE(*status)){
goto CLEANUP;
}
// 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;
}if(prep->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{
for(int32_t j=0; j<srcLength; j++){
if(src[j]> 0x7f){
srcIsASCII = false;
}else if(prep->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;
}
}
}
if(srcIsASCII == false){
// step 2: process the string
b1Len = prep->process(src,srcLength,b1,b1Capacity,allowUnassigned, parseError, *status);
if(*status == U_BUFFER_OVERFLOW_ERROR){
// redo processing of string
/* we do not have enough room so grow the buffer*/
b1 = (char16_t*) uprv_malloc(b1Len * U_SIZEOF_UCHAR);
if(b1==nullptr){
*status = U_MEMORY_ALLOCATION_ERROR;
goto CLEANUP;
}
*status = U_ZERO_ERROR; // reset error
b1Len = prep->process(src,srcLength,b1, b1Len,allowUnassigned, parseError, *status);
}
//bail out on error
if(U_FAILURE(*status)){
goto CLEANUP;
}
}else{
// copy everything to b1
if(srcLength < b1Capacity){
u_memmove(b1, src, srcLength);
}else{
/* we do not have enough room so grow the buffer*/
b1 = (char16_t*) uprv_malloc(srcLength * U_SIZEOF_UCHAR);
if(b1==nullptr){
*status = U_MEMORY_ALLOCATION_ERROR;
goto CLEANUP;
}
u_memmove(b1, src, srcLength);
}
b1Len = srcLength;
}
//step 3: verify ACE Prefix
if(startsWithPrefix(src,srcLength)){
//step 4: Remove the ACE Prefix
b1Prime = b1 + ACE_PREFIX_LENGTH;
b1PrimeLen = b1Len - ACE_PREFIX_LENGTH;
//step 5: Decode using punycode
b2Len = convertFromPuny(b1Prime,b1PrimeLen, b2, b2Capacity, *status);
//b2Len = u_strFromPunycode(b2, b2Capacity,b1Prime,b1PrimeLen, caseFlags, status);
if(*status == U_BUFFER_OVERFLOW_ERROR){
// redo processing of string
/* we do not have enough room so grow the buffer*/
b2 = (char16_t*) uprv_malloc(b2Len * U_SIZEOF_UCHAR);
if(b2==nullptr){
*status = U_MEMORY_ALLOCATION_ERROR;
goto CLEANUP;
}
*status = U_ZERO_ERROR; // reset error
b2Len = convertFromPuny(b1Prime,b1PrimeLen, b2, b2Len, *status);
//b2Len = u_strFromPunycode(b2, b2Len,b1Prime,b1PrimeLen,caseFlags, status);
}
//step 6:Apply toASCII
b3Len = idnaref_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 = (char16_t*) uprv_malloc(b3Len * U_SIZEOF_UCHAR);
if(b3==nullptr){
*status = U_MEMORY_ALLOCATION_ERROR;
goto CLEANUP;
}
*status = U_ZERO_ERROR; // reset error
b3Len = idnaref_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){
*status = U_IDNA_VERIFICATION_ERROR;
goto CLEANUP;
}
//step 8: return output of step 5
reqLength = b2Len;
if(b2Len <= destCapacity) {
u_memmove(dest, b2, b2Len);
}
}else{
// 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;
}
}
//copy the source to destination
if(srcLength <= destCapacity){
u_memmove(dest, src, srcLength);
}
reqLength = srcLength;
}
CLEANUP:
if(b1 != b1Stack){
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){
if(srcLength == -1) {
u_memmove(dest, src, u_strlen(src));
} else {
u_memmove(dest, src, srcLength);
}
}
reqLength = srcLength;
*status = U_ZERO_ERROR;
}
return u_terminateUChars(dest, destCapacity, reqLength, status);
}
static int32_t
getNextSeparator(char16_t *src,int32_t srcLength,NamePrepTransform* prep,
char16_t **limit,
UBool *done,
UErrorCode *status){
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(prep->isLabelSeparator(src[i],*status)){
*limit = src + (i+1); // go past the delimiter
return i;
}
}
}else{
int32_t i;
for(i=0;i<srcLength;i++){
if(prep->isLabelSeparator(src[i],*status)){
*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;
}
}
U_CFUNC int32_t U_EXPORT2
idnaref_IDNToASCII( const char16_t* src, int32_t srcLength,
char16_t* dest, int32_t destCapacity,
int32_t options,
UParseError* parseError,
UErrorCode* status){
if(status == nullptr || U_FAILURE(*status)){
return 0;
}
if((src == nullptr) || (srcLength < -1) || (destCapacity<0) || (!dest && destCapacity > 0)){
*status = U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
int32_t reqLength = 0;
// UParseError parseError;
NamePrepTransform* prep = getInstance(*status);
//initialize pointers to stack buffers
char16_t b1Stack[MAX_LABEL_BUFFER_SIZE];
char16_t *b1 = b1Stack;
int32_t b1Len, labelLen;
char16_t* delimiter = (char16_t*)src;
char16_t* labelStart = (char16_t*)src;
int32_t remainingLen = srcLength;
int32_t b1Capacity = MAX_LABEL_BUFFER_SIZE;
//get the options
// UBool allowUnassigned = (UBool)((options & IDNAREF_ALLOW_UNASSIGNED) != 0);
// UBool useSTD3ASCIIRules = (UBool)((options & IDNAREF_USE_STD3_RULES) != 0);
UBool done = false;
if(U_FAILURE(*status)){
goto CLEANUP;
}
if(srcLength == -1){
for(;;){
if(*delimiter == 0){
break;
}
labelLen = getNextSeparator(labelStart, -1, prep, &delimiter, &done, status);
b1Len = 0;
if(!(labelLen==0 && done)){// make sure this is not a root label separator.
b1Len = idnaref_toASCII(labelStart, labelLen, b1, b1Capacity,
options, parseError, status);
if(*status == U_BUFFER_OVERFLOW_ERROR){
// redo processing of string
/* we do not have enough room so grow the buffer*/
b1 = (char16_t*) uprv_malloc(b1Len * U_SIZEOF_UCHAR);
if(b1==nullptr){
*status = U_MEMORY_ALLOCATION_ERROR;
goto CLEANUP;
}
*status = U_ZERO_ERROR; // reset error
b1Len = idnaref_toASCII(labelStart, labelLen, b1, b1Len,
options, parseError, status);
}
}
if(U_FAILURE(*status)){
goto CLEANUP;
}
int32_t tempLen = (reqLength + b1Len );
// copy to dest
if( tempLen< destCapacity){
u_memmove(dest+reqLength, b1, b1Len);
}
reqLength = tempLen;
// add the label separator
if(done == false){
if(reqLength < destCapacity){
dest[reqLength] = FULL_STOP;
}
reqLength++;
}
labelStart = delimiter;
}
}else{
for(;;){
if(delimiter == src+srcLength){
break;
}
labelLen = getNextSeparator(labelStart, remainingLen, prep, &delimiter, &done, status);
b1Len = idnaref_toASCII(labelStart, labelLen, b1, b1Capacity,
options,parseError, status);
if(*status == U_BUFFER_OVERFLOW_ERROR){
// redo processing of string
/* we do not have enough room so grow the buffer*/
b1 = (char16_t*) uprv_malloc(b1Len * U_SIZEOF_UCHAR);
if(b1==nullptr){
*status = U_MEMORY_ALLOCATION_ERROR;
goto CLEANUP;
}
*status = U_ZERO_ERROR; // reset error
b1Len = idnaref_toASCII(labelStart, labelLen, b1, b1Len,
options, parseError, status);
}
if(U_FAILURE(*status)){
goto CLEANUP;
}
int32_t tempLen = (reqLength + b1Len );
// copy to dest
if( tempLen< destCapacity){
u_memmove(dest+reqLength, b1, b1Len);
}
reqLength = tempLen;
// add the label separator
if(done == false){
if(reqLength < destCapacity){
dest[reqLength] = FULL_STOP;
}
reqLength++;
}
labelStart = delimiter;
remainingLen = static_cast<int32_t>(srcLength - (delimiter - src));
}
}
CLEANUP:
if(b1 != b1Stack){
uprv_free(b1);
}
// delete prep;
return u_terminateUChars(dest, destCapacity, reqLength, status);
}
U_CFUNC int32_t U_EXPORT2
idnaref_IDNToUnicode( const char16_t* src, int32_t srcLength,
char16_t* dest, int32_t destCapacity,
int32_t options,
UParseError* parseError,
UErrorCode* status){
if(status == nullptr || U_FAILURE(*status)){
return 0;
}
if((src == nullptr) || (srcLength < -1) || (destCapacity<0) || (!dest && destCapacity > 0)){
*status = U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
int32_t reqLength = 0;
UBool done = false;
NamePrepTransform* prep = getInstance(*status);
//initialize pointers to stack buffers
char16_t b1Stack[MAX_LABEL_BUFFER_SIZE];
char16_t *b1 = b1Stack;
int32_t b1Len, labelLen;
char16_t* delimiter = (char16_t*)src;
char16_t* labelStart = (char16_t*)src;
int32_t remainingLen = srcLength;
int32_t b1Capacity = MAX_LABEL_BUFFER_SIZE;
//get the options
// UBool allowUnassigned = (UBool)((options & IDNAREF_ALLOW_UNASSIGNED) != 0);
// UBool useSTD3ASCIIRules = (UBool)((options & IDNAREF_USE_STD3_RULES) != 0);
if(U_FAILURE(*status)){
goto CLEANUP;
}
if(srcLength == -1){
for(;;){
if(*delimiter == 0){
break;
}
labelLen = getNextSeparator(labelStart, -1, prep, &delimiter, &done, status);
if(labelLen==0 && done==false){
*status = U_IDNA_ZERO_LENGTH_LABEL_ERROR;
}
b1Len = idnaref_toUnicode(labelStart, labelLen, b1, b1Capacity,
options, parseError, status);
if(*status == U_BUFFER_OVERFLOW_ERROR){
// redo processing of string
/* we do not have enough room so grow the buffer*/
b1 = (char16_t*) uprv_malloc(b1Len * U_SIZEOF_UCHAR);
if(b1==nullptr){
*status = U_MEMORY_ALLOCATION_ERROR;
goto CLEANUP;
}
*status = U_ZERO_ERROR; // reset error
b1Len = idnaref_toUnicode( labelStart, labelLen, b1, b1Len,
options, parseError, status);
}
if(U_FAILURE(*status)){
goto CLEANUP;
}
int32_t tempLen = (reqLength + b1Len );
// copy to dest
if( tempLen< destCapacity){
u_memmove(dest+reqLength, b1, b1Len);
}
reqLength = tempLen;
// add the label separator
if(done == false){
if(reqLength < destCapacity){
dest[reqLength] = FULL_STOP;
}
reqLength++;
}
labelStart = delimiter;
}
}else{
for(;;){
if(delimiter == src+srcLength){
break;
}
labelLen = getNextSeparator(labelStart, remainingLen, prep, &delimiter, &done, status);
if(labelLen==0 && done==false){
*status = U_IDNA_ZERO_LENGTH_LABEL_ERROR;
}
b1Len = idnaref_toUnicode( labelStart,labelLen, b1, b1Capacity,
options, parseError, status);
if(*status == U_BUFFER_OVERFLOW_ERROR){
// redo processing of string
/* we do not have enough room so grow the buffer*/
b1 = (char16_t*) uprv_malloc(b1Len * U_SIZEOF_UCHAR);
if(b1==nullptr){
*status = U_MEMORY_ALLOCATION_ERROR;
goto CLEANUP;
}
*status = U_ZERO_ERROR; // reset error
b1Len = idnaref_toUnicode( labelStart, labelLen, b1, b1Len,
options, parseError, status);
}
if(U_FAILURE(*status)){
goto CLEANUP;
}
int32_t tempLen = (reqLength + b1Len );
// copy to dest
if( tempLen< destCapacity){
u_memmove(dest+reqLength, b1, b1Len);
}
reqLength = tempLen;
// add the label separator
if(done == false){
if(reqLength < destCapacity){
dest[reqLength] = FULL_STOP;
}
reqLength++;
}
labelStart = delimiter;
remainingLen = static_cast<int32_t>(srcLength - (delimiter - src));
}
}
CLEANUP:
if(b1 != b1Stack){
uprv_free(b1);
}
// delete prep;
return u_terminateUChars(dest, destCapacity, reqLength, status);
}