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/** Implementation of the pqxx::stream_to class.
*
* pqxx::stream_to enables optimized batch updates to a database table.
*
* Copyright (c) 2000-2019, Jeroen T. Vermeulen.
*
* See COPYING for copyright license. If you did not receive a file called
* COPYING with this source code, please notify the distributor of this mistake,
* or contact the author.
*/
#include "pqxx/compiler-internal.hxx"
#include "pqxx/stream_to.hxx"
#include "pqxx/internal/gates/transaction-stream_to.hxx"
pqxx::stream_to::stream_to(
transaction_base &tb,
const std::string &table_name
) :
namedclass{"stream_to", table_name},
stream_base{tb}
{
set_up(tb, table_name);
}
pqxx::stream_to::~stream_to() noexcept
{
try
{
complete();
}
catch (const std::exception &e)
{
reg_pending_error(e.what());
}
}
void pqxx::stream_to::complete()
{
close();
}
void pqxx::stream_to::write_raw_line(const std::string &line)
{
internal::gate::transaction_stream_to{m_trans}.write_copy_line(line);
}
pqxx::stream_to & pqxx::stream_to::operator<<(stream_from &tr)
{
std::string line;
while (tr)
{
tr.get_raw_line(line);
write_raw_line(line);
}
return *this;
}
void pqxx::stream_to::set_up(
transaction_base &tb,
const std::string &table_name
)
{
set_up(tb, table_name, "");
}
void pqxx::stream_to::set_up(
transaction_base &tb,
const std::string &table_name,
const std::string &columns
)
{
internal::gate::transaction_stream_to{tb}.BeginCopyWrite(
table_name,
columns
);
register_me();
}
void pqxx::stream_to::close()
{
if (*this)
{
stream_base::close();
try
{
internal::gate::transaction_stream_to{m_trans}.end_copy_write();
}
catch (const std::exception &)
{
try
{
stream_base::close();
}
catch (const std::exception &) {}
throw;
}
}
}
std::string pqxx::internal::TypedCopyEscaper::escape(const std::string &s)
{
if (s.empty())
return s;
std::string escaped;
escaped.reserve(s.size()+1);
for (auto c : s)
switch (c)
{
case '\b': escaped += "\\b"; break; // Backspace
case '\f': escaped += "\\f"; break; // Vertical tab
case '\n': escaped += "\\n"; break; // Form feed
case '\r': escaped += "\\r"; break; // Newline
case '\t': escaped += "\\t"; break; // Tab
case '\v': escaped += "\\v"; break; // Carriage return
case '\\': escaped += "\\\\"; break; // Backslash
default:
if (c < ' ' or c > '~')
{
escaped += "\\";
for (auto i = 2; i >= 0; --i)
escaped += number_to_digit((c >> (3*i)) & 0x07);
}
else
escaped += c;
break;
}
return escaped;
}
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