void Cask::CdapOdbc::DataReader::fetchWVarchar(const wchar_t* str, const ColumnBinding& binding) {
assert(binding.getTargetType() == SQL_WCHAR || binding.getTargetType() == SQL_DEFAULT);
if (str) {
std::wstring uniStr = str;
size_t maxLength = static_cast<size_t>(binding.getBufferLength()) - 1;
size_t size = (uniStr.size() < maxLength) ? uniStr.size() : maxLength;
if (binding.getTargetValuePtr()) {
wchar_t* outString = static_cast<wchar_t*>(binding.getTargetValuePtr());
auto it = stdext::make_checked_array_iterator<wchar_t*>(outString, size);
std::copy(uniStr.begin(), uniStr.begin() + size, it);
outString[size] = 0;
}
if (binding.getStrLenOrInd()) {
if (size <= maxLength) {
*binding.getStrLenOrInd() = size;
} else {
*binding.getStrLenOrInd() = SQL_NO_TOTAL;
}
}
} else {
if (binding.getTargetValuePtr() && binding.getBufferLength() > 0) {
wchar_t* outString = static_cast<wchar_t*>(binding.getTargetValuePtr());
outString[0] = 0;
}
if (binding.getStrLenOrInd()) {
*binding.getStrLenOrInd() = SQL_NULL_DATA;
}
}
}
void Cask::CdapOdbc::DataReader::fetchValue(const web::json::value& value, const ColumnBinding& binding) {
std::wstring strValue;
SQLDOUBLE dblValue = NAN;
switch (binding.getTargetType()) {
case SQL_CHAR:
strValue = to_wstring(value);
this->fetchVarchar(strValue.c_str(), binding);
break;
case SQL_WCHAR:
strValue = to_wstring(value);
this->fetchWVarchar(strValue.c_str(), binding);
break;
case SQL_DOUBLE:
if (value.is_string()) {
dblValue = std::wcstod(value.as_string().c_str(), nullptr);
} else if (value.is_integer()) {
dblValue = value.as_integer();
} else if (value.is_double()) {
dblValue = value.as_double();
} else if (value.is_number()) {
dblValue = value.as_number().to_double();
} else if (value.is_boolean()) {
dblValue = value.as_bool() ? 1.0 : 0.0;
}
this->fetchDouble(dblValue, binding);
break;
}
}
void Cask::CdapOdbc::DataReader::fetchInt(SQLINTEGER value, const ColumnBinding& binding) {
assert(binding.getTargetType() == SQL_C_SLONG || binding.getTargetType() == SQL_DEFAULT);
*(reinterpret_cast<SQLINTEGER*>(binding.getTargetValuePtr())) = value;
}
void Cask::CdapOdbc::DataReader::fetchDouble(SQLDOUBLE value, const ColumnBinding& binding) {
assert(binding.getTargetType() == SQL_DOUBLE || binding.getTargetType() == SQL_DEFAULT);
*(reinterpret_cast<SQLDOUBLE*>(binding.getTargetValuePtr())) = value;
}
void Cask::CdapOdbc::DataReader::fetchSmallint(SQLSMALLINT value, const ColumnBinding& binding) {
assert(binding.getTargetType() == SQL_C_SSHORT || binding.getTargetType() == SQL_DEFAULT);
*(reinterpret_cast<SQLSMALLINT*>(binding.getTargetValuePtr())) = value;
}