public ulong Visitor(ref EJDB_EXEC ctx, ref EJDB_DOC doc, out long step)
{
ulong rc = 0;
IntPtr xstr = IntPtr.Zero;
step = 0;
try
{
uint sz = _helper.jbl_size(doc.raw).ToUInt32() * 2;
xstr = _helper.iwxstr_new2((UIntPtr)sz);
if (xstr == IntPtr.Zero)
{
throw new InvalidOperationException("iwxstr_new2 failed.");
}
rc = doc.node != IntPtr.Zero
? _helper.jbn_as_json(doc.node, _helper.jbl_xstr_json_printer,
xstr, jbl_print_flags_t.JBL_PRINT_NONE)
: _helper.jbl_as_json(doc.raw, _helper.jbl_xstr_json_printer,
xstr, jbl_print_flags_t.JBL_PRINT_NONE);
if (rc != 0)
{
throw _e.CreateException(rc);
}
string json = Utf8String.FromIntPtr(_helper.iwxstr_ptr(xstr));
long llv = _callback(doc.id, json);
step = llv < -2 ? 0 : llv;
}
finally
{
if (xstr != IntPtr.Zero)
{
_helper.iwxstr_destroy(xstr);
}
}
return(rc);
}
public long ExecuteScalarInt64(EJDB2Handle db, EJDB2Handle jql,
long skip, long limit, StringWriter explain)
{
if (db.IsInvalid)
{
throw new ArgumentException("Invalid DB handle.");
}
if (db.IsClosed)
{
throw new ArgumentException("DB handle is closed.");
}
if (jql.IsInvalid)
{
throw new ArgumentException("Invalid JQL handle.");
}
if (jql.IsClosed)
{
throw new ArgumentException("JQL handle is closed.");
}
IntPtr log = IntPtr.Zero;
try
{
if (explain != null)
{
log = _helper.iwxstr_new();
if (log == IntPtr.Zero)
{
throw new InvalidOperationException("iwxstr_new failed.");
}
}
var ux = new EJDB_EXEC
{
db = db.DangerousGetHandle(),
q = jql.DangerousGetHandle(),
skip = skip > 0 ? skip : 0,
limit = limit > 0 ? limit : 0,
opaque = IntPtr.Zero,
visitor = null,
log = log,
};
ulong rc = _helper.ejdb_exec(ref ux);
if (rc != 0)
{
throw _e.CreateException(rc);
}
if (log != IntPtr.Zero)
{
string slog = Utf8String.FromIntPtr(_helper.iwxstr_ptr(log));
explain.Write(slog);
}
return(ux.cnt);
}
finally
{
if (log != IntPtr.Zero)
{
_helper.iwxstr_destroy(log);
}
}
}