pop3_top.c
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999-2001, 2004, 2007, 2010-2012, 2014-2016 Free
Software Foundation, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library. If not, see
<http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <string.h>
#include <errno.h>
#include <mailutils/sys/pop3.h>
int
mu_pop3_top (mu_pop3_t pop3, unsigned msgno, unsigned int lines,
mu_stream_t *pstream)
{
int status;
if (pop3 == NULL || msgno == 0)
return EINVAL;
if (pstream == NULL)
return MU_ERR_OUT_PTR_NULL;
switch (pop3->state)
{
case MU_POP3_NO_STATE:
status = mu_pop3_writeline (pop3, "TOP %d %d\r\n", msgno, lines);
MU_POP3_CHECK_ERROR (pop3, status);
MU_POP3_FCLR (pop3, MU_POP3_ACK);
pop3->state = MU_POP3_TOP;
case MU_POP3_TOP:
status = mu_pop3_response (pop3, NULL);
MU_POP3_CHECK_EAGAIN (pop3, status);
MU_POP3_CHECK_OK (pop3);
status = mu_pop3_stream_create (pop3, pstream);
MU_POP3_CHECK_ERROR (pop3, status);
if (mu_pop3_trace_mask (pop3, MU_POP3_TRACE_QRY, MU_XSCRIPT_PAYLOAD))
_mu_pop3_xscript_level (pop3, MU_XSCRIPT_PAYLOAD);
pop3->state = MU_POP3_TOP_RX;
case MU_POP3_TOP_RX:
break;
/* They must deal with the error first by reopening. */
case MU_POP3_ERROR:
status = ECANCELED;
break;
default:
status = EINPROGRESS;
}
return status;
}