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/*
* Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; version 2 of the
* License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#include "base/sqlstring.h"
using namespace base;
const sqlstring sqlstring::null(sqlstring("NULL", 0));
sqlstring::sqlstring(const char* format_string, const sqlstringformat format)
: _format_string_left(format_string), _format(format)
{
append(consume_until_next_escape());
}
sqlstring::sqlstring(const sqlstring ©)
: _formatted(copy._formatted), _format_string_left(copy._format_string_left), _format(copy._format)
{
}
sqlstring::sqlstring()
: _format(0)
{
}
std::string sqlstring::consume_until_next_escape()
{
std::string::size_type e = _format_string_left.length(), p = 0;
while (p < e)
{
char ch = _format_string_left[p];
if (ch == '?' || ch == '!')
break;
++p;
}
if (p > 0)
{
std::string s = _format_string_left.substr(0, p);
if (p < e)
_format_string_left = _format_string_left.substr(p);
else
_format_string_left.clear();
return s;
}
return "";
}
int sqlstring::next_escape()
{
if (_format_string_left.empty())
throw std::invalid_argument("Error formatting SQL query: more arguments than escapes");
int c = _format_string_left[0];
_format_string_left = _format_string_left.substr(1);
return c;
}
sqlstring &sqlstring::append(const std::string &s)
{
_formatted.append(s);
return *this;
}
sqlstring::operator std::string () const
{
return _formatted + _format_string_left;
}
bool sqlstring::done() const
{
if (_format_string_left.empty())
return true;
return _format_string_left[0] != '!' && _format_string_left[0] != '?';
}
sqlstring &sqlstring::operator <<(const double v)
{
int esc = next_escape();
if (esc != '?')
throw std::invalid_argument("Error formatting SQL query: invalid escape for numeric argument");
append(strfmt("%f", v));
append(consume_until_next_escape());
return *this;
}
sqlstring &sqlstring::operator <<(const sqlstringformat format)
{
_format = format;
return *this;
}
sqlstring &sqlstring::operator <<(const std::string& v)
{
int esc = next_escape();
if (esc == '!')
{
std::string escaped = escape_backticks(v);
if ((_format._flags & QuoteOnlyIfNeeded) != 0)
append(base::quote_identifier_if_needed(escaped, '`'));
else
append(base::quote_identifier(escaped, '`'));
}
else if (esc == '?')
{
if (_format._flags & UseAnsiQuotes)
append("\"").append(escape_sql_string(v)).append("\"");
else
append("'").append(escape_sql_string(v)).append("'");
}
else // shouldn't happen
throw std::invalid_argument("Error formatting SQL query: internal error, expected ? or ! escape got something else");
append(consume_until_next_escape());
return *this;
}
sqlstring &sqlstring::operator <<(const sqlstring& v)
{
next_escape();
append(v);
append(consume_until_next_escape());
return *this;
}
sqlstring &sqlstring::operator <<(const char* v)
{
int esc = next_escape();
if (esc == '!')
{
if (!v)
throw std::invalid_argument("Error formatting SQL query: NULL value found for identifier");
std::string quoted = escape_backticks(v);
if (quoted == v && (_format._flags & QuoteOnlyIfNeeded))
append(quoted);
else
append("`").append(quoted).append("`");
}
else if (esc == '?')
{
if (v)
{
if (_format._flags & UseAnsiQuotes)
append("\"").append(escape_sql_string(v)).append("\"");
else
append("'").append(escape_sql_string(v)).append("'");
}
else
append("NULL");
}
else // shouldn't happen
throw std::invalid_argument("Error formatting SQL query: internal error, expected ? or ! escape got something else");
append(consume_until_next_escape());
return *this;
}
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