internal override void CreateFunction(string strFunction, int nArgs, bool needCollSeq, SQLiteCallback func, SQLiteCallback funcstep, SQLiteFinalCallback funcfinal)
{
int n;
#if MONOTOUCH
var data = new FunctionData();
data.Func = func;
data.FuncStep = funcstep;
data.FuncFinal = funcfinal;
SQLiteCallback func_callback = func == null ? null : new SQLiteCallback(scalar_callback);
SQLiteCallback funcstep_callback = funcstep == null ? null : new SQLiteCallback(step_callback);
SQLiteFinalCallback funcfinal_callback = funcfinal == null ? null : new SQLiteFinalCallback(final_callback);
IntPtr user_data;
user_data = GCHandle.ToIntPtr(GCHandle.Alloc(data));
n = UnsafeNativeMethods.sqlite3_create_function_v2(_sql, ToUTF8(strFunction), nArgs, 4, user_data, func_callback, funcstep_callback, funcfinal_callback, destroy_callback);
if (n == 0)
{
// sqlite3_create_function_v2 will call 'destroy_callback' if it fails, so we need to recreate the gchandle here.
user_data = GCHandle.ToIntPtr(GCHandle.Alloc(data));
n = UnsafeNativeMethods.sqlite3_create_function_v2(_sql, ToUTF8(strFunction), nArgs, 1, user_data, func_callback, funcstep_callback, funcfinal_callback, destroy_callback);
}
#elif !SQLITE_STANDARD
n = UnsafeNativeMethods.sqlite3_create_function_interop(_sql, ToUTF8(strFunction), nArgs, 4, IntPtr.Zero, func, funcstep, funcfinal, (needCollSeq == true) ? 1 : 0);
if (n == 0)
{
n = UnsafeNativeMethods.sqlite3_create_function_interop(_sql, ToUTF8(strFunction), nArgs, 1, IntPtr.Zero, func, funcstep, funcfinal, (needCollSeq == true) ? 1 : 0);
}
#else
n = UnsafeNativeMethods.sqlite3_create_function(_sql, ToUTF8(strFunction), nArgs, 4, IntPtr.Zero, func, funcstep, funcfinal);
if (n == 0)
{
n = UnsafeNativeMethods.sqlite3_create_function(_sql, ToUTF8(strFunction), nArgs, 1, IntPtr.Zero, func, funcstep, funcfinal);
}
#endif
if (n > 0)
{
throw new SqliteException(n, SQLiteLastError());
}
}