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// file : odb/sqlite/stream.cxx
// license : GNU GPL v2; see accompanying LICENSE file
#include <sqlite3.h>
#if SQLITE_VERSION_NUMBER >= 3004000
#include <odb/sqlite/stream.hxx>
#include <stdexcept> // invalid_argument
#include <odb/sqlite/error.hxx>
#include <odb/sqlite/database.hxx>
#include <odb/sqlite/transaction.hxx>
using namespace std;
namespace odb
{
namespace sqlite
{
stream::
stream (const char* db,
const char* table,
const char* column,
long long rowid,
bool rw)
: active_object (transaction::current ().connection ())
{
int e (sqlite3_blob_open (conn_.handle (),
db,
table,
column,
static_cast<sqlite_int64> (rowid),
rw,
&h_));
if (e != SQLITE_OK)
translate_error (e, conn_);
list_add (); // Add ourselves to the active objects list.
}
size_t stream::
size () const
{
return static_cast<size_t> (sqlite3_blob_bytes (h_));
}
void stream::
read (void* buf, size_t n, size_t o)
{
int e (sqlite3_blob_read (
h_, buf, static_cast<int> (n), static_cast<int> (o)));
if (e != SQLITE_OK)
{
if (e == SQLITE_ERROR)
throw invalid_argument ("read past end");
else
translate_error (e, conn_);
}
}
void stream::
write (const void* buf, size_t n, size_t o)
{
int e (sqlite3_blob_write (
h_, buf, static_cast<int> (n), static_cast<int> (o)));
if (e != SQLITE_OK)
{
if (e == SQLITE_ERROR)
throw invalid_argument ("write past end");
else
translate_error (e, conn_);
}
}
void stream::
close (bool check)
{
if (h_ != 0)
{
list_remove ();
int e (sqlite3_blob_close (h_));
h_ = 0; // No use trying again.
if (check && e != SQLITE_OK)
translate_error (e, conn_);
}
}
#if SQLITE_VERSION_NUMBER >= 3007004
void stream::
reopen (long long rowid)
{
int e (sqlite3_blob_reopen (h_, rowid));
if (e != SQLITE_OK)
// According to the SQLite documentation, the handle is now
// considered aborted, which means we still need to close it.
//
translate_error (e, conn_);
}
#endif
void stream::
clear ()
{
// This call can be part of the stack unwinding, so don't check
// for the errors.
//
close (false);
}
}
}
#endif // SQLITE_VERSION_NUMBER >= 3004000
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