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// file : mysql/types/traits.hxx
// author : Boris Kolpackov <boris@codesynthesis.com>
// copyright : Copyright (c) 2009-2010 Code Synthesis Tools CC
// license : GNU GPL v2; see accompanying LICENSE file
#ifndef TRAITS_HXX
#define TRAITS_HXX
#include <cstring> // std::memcpy, std::memset
#include <odb/mysql/traits.hxx>
#include "test.hxx" // date_time
namespace odb
{
namespace mysql
{
template <>
class value_traits<date_time>
{
public:
typedef date_time type;
typedef date_time value_type;
static void
set_value (date_time& v, const MYSQL_TIME& i, bool is_null)
{
if (!is_null)
{
v.negative = i.neg;
v.year = i.year;
v.month = i.month;
v.day = i.day;
v.hour = i.hour;
v.minute = i.minute;
v.second = i.second;
}
else
v = date_time ();
}
static void
set_image (MYSQL_TIME& i, bool& is_null, const date_time& v)
{
is_null = false;
i.neg = v.negative;
i.year = v.year;
i.month = v.month;
i.day = v.day;
i.hour = v.hour;
i.minute = v.minute;
i.second = v.second;
i.second_part = 0;
}
};
template <>
class value_traits< ::buffer >
{
public:
typedef ::buffer type;
typedef ::buffer value_type;
static void
set_value (type& v, const char* s, std::size_t n, bool is_null)
{
if (!is_null)
v.assign (s, n);
else
v.assign (0, 0);
}
static void
set_image (char* s,
std::size_t c,
std::size_t& n,
bool& is_null,
const type& v)
{
is_null = false;
n = v.size ();
if (n > c)
n = c;
if (n != 0)
std::memcpy (s, v.data (), n);
}
static void
set_image (odb::buffer& b,
std::size_t& n,
bool& is_null,
const type& v)
{
is_null = false;
n = v.size ();
if (n > b.capacity ())
b.capacity (n);
if (n != 0)
std::memcpy (b.data (), v.data (), n);
}
};
template <>
class value_traits<bitfield>
{
public:
typedef bitfield type;
typedef bitfield value_type;
static void
set_value (bitfield& v,
const unsigned char* s,
std::size_t,
bool is_null)
{
if (!is_null)
std::memcpy (&v, s, 1);
else
std::memset (&v, 0, sizeof (bitfield));
}
static void
set_image (unsigned char* s,
std::size_t,
std::size_t& n,
bool& is_null,
bitfield v)
{
is_null = false;
n = 1;
std::memcpy (s, &v, 1);
s[0] &= 0x0F; // Clear unused bits -- MySQL is sensitive about that.
}
};
template <>
class value_traits<set>
{
public:
typedef set type;
typedef set value_type;
static void
set_value (set& v, const char* s, std::size_t n, bool is_null)
{
v.clear ();
if (!is_null)
{
const char* e (s + n);
while (s < e)
{
const char* p (s);
while (p < e && *p != ',')
++p;
v.insert (std::string (s, p - s));
s = p;
if (p != e)
++s;
}
}
}
static void
set_image (odb::buffer& buf,
std::size_t& n,
bool& is_null,
const set& v)
{
is_null = false;
n = 0;
for (set::const_iterator b (v.begin ()), i (b); i != v.end (); ++i)
{
std::size_t m (i->size () + (i != b ? 1 : 0));
if (n + m > buf.capacity ())
buf.capacity (n + m, n);
if (i != b)
buf.data ()[n++] = ',';
std::memcpy (buf.data () + n, i->c_str (), i->size ());
n += i->size ();
}
}
};
template <>
class value_traits<std::auto_ptr<std::string> >
{
public:
typedef std::auto_ptr<std::string> type;
typedef std::string value_type;
static void
set_value (std::auto_ptr<std::string>& v,
const char* s,
std::size_t n,
bool is_null)
{
v.reset (is_null ? 0 : new std::string (s, n));
}
static void
set_image (odb::buffer& b,
std::size_t& n,
bool& is_null,
const std::auto_ptr<std::string>& v)
{
is_null = v.get () == 0;
if (!is_null)
{
n = v->size ();
if (n > b.capacity ())
b.capacity (n);
if (n != 0)
std::memcpy (b.data (), v->c_str (), n);
}
}
};
}
}
#endif // TRAITS_HXX
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