Fix for OCI_LobSeek

[Albertino80]

Hi,
i found a bug in function:
boolean OCI_API OCI_LobSeek

the problem is related to the control:
if ((offset + lob->offset - 1) > size)
that is valid only if mode = OCI_SEEK_CUR

I changed the function (see below), now it works properly.

boolean OCI_API OCI_LobSeek
(
    OCI_Lob     *lob,
    big_uint     offset,
    unsigned int mode
)
{
    boolean res   = TRUE;
    big_uint size = 0;

    OCI_CHECK_PTR(OCI_IPC_LOB, lob, FALSE);

    size = OCI_LobGetLength(lob);

    switch (mode)
    {
        case OCI_SEEK_CUR:
            if ((offset + lob->offset - 1) > size) 
                res = FALSE;
            else
                lob->offset += offset;
            break;
        case OCI_SEEK_SET:
            if (offset > size) 
                res = FALSE;
            else
                lob->offset = offset + 1;
            break;
        case OCI_SEEK_END:
            if (offset > size) 
                res = FALSE;
            else
                lob->offset = size - offset + 1;
            break;
        default:
            res = FALSE;
    }

    OCI_RESULT(res);

    return res;
}

[Vincent Rogier]

Bug fixed in OCILIB trunck (v4.0.0)