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/*
* Copyright (c) 2012-2013 Isode Limited.
* All rights reserved.
* See the COPYING file for more information.
*/
#include <Swiften/IDN/ICUConverter.h>
#pragma GCC diagnostic ignored "-Wold-style-cast"
#pragma clang diagnostic ignored "-Wheader-hygiene"
#include <unicode/uidna.h>
#include <unicode/usprep.h>
#include <unicode/ucnv.h>
#include <unicode/ustring.h>
#include <boost/numeric/conversion/cast.hpp>
using namespace Swift;
using boost::numeric_cast;
namespace {
typedef std::vector<UChar, SafeAllocator<UChar> > ICUString;
const char* toConstCharArray(const std::string& input) {
return input.c_str();
}
const char* toConstCharArray(const std::vector<unsigned char, SafeAllocator<unsigned char> >& input) {
return reinterpret_cast<const char*>(vecptr(input));
}
template<typename T>
ICUString convertToICUString(const T& s) {
ICUString result;
result.resize(s.size());
UErrorCode status = U_ZERO_ERROR;
int32_t icuResultLength = numeric_cast<int32_t>(result.size());
u_strFromUTF8Lenient(vecptr(result), numeric_cast<int32_t>(result.size()), &icuResultLength, toConstCharArray(s), numeric_cast<int32_t>(s.size()), &status);
if (status == U_BUFFER_OVERFLOW_ERROR) {
status = U_ZERO_ERROR;
result.resize(numeric_cast<size_t>(icuResultLength));
u_strFromUTF8Lenient(vecptr(result), numeric_cast<int32_t>(result.size()), &icuResultLength, toConstCharArray(s), numeric_cast<int32_t>(s.size()), &status);
}
if (U_FAILURE(status)) {
return ICUString();
}
result.resize(numeric_cast<size_t>(icuResultLength));
return result;
}
std::vector<char, SafeAllocator<char> > convertToArray(const ICUString& input) {
std::vector<char, SafeAllocator<char> > result;
result.resize(input.size());
UErrorCode status = U_ZERO_ERROR;
int32_t inputLength = numeric_cast<int32_t>(result.size());
u_strToUTF8(vecptr(result), numeric_cast<int32_t>(result.size()), &inputLength, vecptr(input), numeric_cast<int32_t>(input.size()), &status);
if (status == U_BUFFER_OVERFLOW_ERROR) {
status = U_ZERO_ERROR;
result.resize(numeric_cast<size_t>(inputLength));
u_strToUTF8(vecptr(result), numeric_cast<int32_t>(result.size()), &inputLength, vecptr(input), numeric_cast<int32_t>(input.size()), &status);
}
if (U_FAILURE(status)) {
return std::vector<char, SafeAllocator<char> >();
}
result.resize(numeric_cast<size_t>(inputLength) + 1);
result[result.size() - 1] = '\0';
return result;
}
std::string convertToString(const ICUString& input) {
return std::string(vecptr(convertToArray(input)));
}
UStringPrepProfileType getICUProfileType(IDNConverter::StringPrepProfile profile) {
switch(profile) {
case IDNConverter::NamePrep: return USPREP_RFC3491_NAMEPREP;
case IDNConverter::XMPPNodePrep: return USPREP_RFC3920_NODEPREP;
case IDNConverter::XMPPResourcePrep: return USPREP_RFC3920_RESOURCEPREP;
case IDNConverter::SASLPrep: return USPREP_RFC4013_SASLPREP;
}
assert(false);
return USPREP_RFC3491_NAMEPREP;
}
template<typename StringType>
std::vector<char, SafeAllocator<char> > getStringPreparedDetail(const StringType& s, IDNConverter::StringPrepProfile profile) {
UErrorCode status = U_ZERO_ERROR;
boost::shared_ptr<UStringPrepProfile> icuProfile(usprep_openByType(getICUProfileType(profile), &status), usprep_close);
assert(U_SUCCESS(status));
ICUString icuInput = convertToICUString(s);
ICUString icuResult;
UParseError parseError;
icuResult.resize(icuInput.size());
int32_t icuResultLength = usprep_prepare(icuProfile.get(), vecptr(icuInput), numeric_cast<int32_t>(icuInput.size()), vecptr(icuResult), numeric_cast<int32_t>(icuResult.size()), USPREP_ALLOW_UNASSIGNED, &parseError, &status);
icuResult.resize(numeric_cast<size_t>(icuResultLength));
if (status == U_BUFFER_OVERFLOW_ERROR) {
status = U_ZERO_ERROR;
icuResult.resize(numeric_cast<size_t>(icuResultLength));
icuResultLength = usprep_prepare(icuProfile.get(), vecptr(icuInput), numeric_cast<int32_t>(icuInput.size()), vecptr(icuResult), numeric_cast<int32_t>(icuResult.size()), USPREP_ALLOW_UNASSIGNED, &parseError, &status);
icuResult.resize(numeric_cast<size_t>(icuResultLength));
}
if (U_FAILURE(status)) {
return std::vector<char, SafeAllocator<char> >();
}
icuResult.resize(numeric_cast<size_t>(icuResultLength));
return convertToArray(icuResult);
}
}
namespace Swift {
std::string ICUConverter::getStringPrepared(const std::string& s, StringPrepProfile profile) {
if (s.empty()) {
return "";
}
std::vector<char, SafeAllocator<char> > preparedData = getStringPreparedDetail(s, profile);
if (preparedData.empty()) {
throw std::exception();
}
return std::string(vecptr(preparedData));
}
SafeByteArray ICUConverter::getStringPrepared(const SafeByteArray& s, StringPrepProfile profile) {
if (s.empty()) {
return SafeByteArray();
}
std::vector<char, SafeAllocator<char> > preparedData = getStringPreparedDetail(s, profile);
if (preparedData.empty()) {
throw std::exception();
}
return createSafeByteArray(reinterpret_cast<const char*>(vecptr(preparedData)));
}
boost::optional<std::string> ICUConverter::getIDNAEncoded(const std::string& domain) {
UErrorCode status = U_ZERO_ERROR;
ICUString icuInput = convertToICUString(domain);
ICUString icuResult;
icuResult.resize(icuInput.size());
UParseError parseError;
int32_t icuResultLength = uidna_IDNToASCII(vecptr(icuInput), numeric_cast<int32_t>(icuInput.size()), vecptr(icuResult), numeric_cast<int32_t>(icuResult.size()), UIDNA_USE_STD3_RULES, &parseError, &status);
if (status == U_BUFFER_OVERFLOW_ERROR) {
status = U_ZERO_ERROR;
icuResult.resize(numeric_cast<size_t>(icuResultLength));
icuResultLength = uidna_IDNToASCII(vecptr(icuInput), numeric_cast<int32_t>(icuInput.size()), vecptr(icuResult), numeric_cast<int32_t>(icuResult.size()), UIDNA_USE_STD3_RULES, &parseError, &status);
}
if (U_FAILURE(status)) {
return boost::optional<std::string>();
}
icuResult.resize(numeric_cast<size_t>(icuResultLength));
return convertToString(icuResult);
}
}
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Swift