/* t-eventloop.c  - regression test
   Copyright (C) 2000 Werner Koch (dd9jn)
   Copyright (C) 2001, 2002, 2003 g10 Code GmbH

   This file is part of GPGME.
 
   GPGME is free software; you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
 
   GPGME 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
   General Public License for more details.
 
   You should have received a copy of the GNU General Public License
   along with GPGME; if not, write to the Free Software Foundation,
   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include <sys/select.h>

#include <gpgme.h>

#define fail_if_err(err)					\
  do								\
    {								\
      if (err)							\
        {							\
          fprintf (stderr, "%s:%d: gpgme_error_t %s\n",		\
                   __FILE__, __LINE__, gpgme_strerror (err));   \
          exit (1);						\
        }							\
    }								\
  while (0)


static void
print_data (gpgme_data_t dh)
{
  char buf[100];
  int ret;
  
  ret = gpgme_data_seek (dh, 0, SEEK_SET);
  if (ret)
    fail_if_err (GPGME_File_Error);
  while ((ret = gpgme_data_read (dh, buf, 100)) > 0)
    fwrite (buf, ret, 1, stdout);
  if (ret < 0)
    fail_if_err (GPGME_File_Error);
}


/* Stripped down version of gpgme/wait.c.  */

struct op_result
{
  int done;
  gpgme_error_t err;
};

struct op_result op_result;

struct one_fd
{
  int fd;
  int dir;
  gpgme_io_cb_t fnc;
  void *fnc_data;
};

#define FDLIST_MAX 32
struct one_fd fdlist[FDLIST_MAX];

gpgme_error_t
add_io_cb (void *data, int fd, int dir, gpgme_io_cb_t fnc, void *fnc_data,
	   void **r_tag)
{
  struct one_fd *fds = data;
  int i;

  for (i = 0; i < FDLIST_MAX; i++)
    {
      if (fds[i].fd == -1)
	{
	  fds[i].fd = fd;
	  fds[i].dir = dir;
	  fds[i].fnc = fnc;
	  fds[i].fnc_data = fnc_data;
	  break;
	}
    }
  if (i == FDLIST_MAX)
    return GPGME_General_Error;
  *r_tag = &fds[i];
  return 0;
}

void
remove_io_cb (void *tag)
{
  struct one_fd *fd = tag;

  fd->fd = -1;
}

void
io_event (void *data, gpgme_event_io_t type, void *type_data)
{
  struct op_result *result = data;

  if (type == GPGME_EVENT_DONE)
    {
      result->done = 1;
      result->err = * (gpgme_error_t *) type_data;
    }
}


int
do_select (void)
{
  fd_set rfds;
  fd_set wfds;
  int i, n;
  int any = 0;

  FD_ZERO (&rfds);
  FD_ZERO (&wfds);
  for (i = 0; i < FDLIST_MAX; i++)
    if (fdlist[i].fd != -1)
      FD_SET (fdlist[i].fd, fdlist[i].dir ? &rfds : &wfds);

  do
    {
      n = select (FD_SETSIZE, &rfds, &wfds, NULL, 0);
    }
  while (n < 0 && errno == EINTR);

  if (n < 0)
    return n;	/* Error or timeout.  */

  for (i = 0; i < FDLIST_MAX && n; i++)
    {
      if (fdlist[i].fd != -1)
	{
	  if (FD_ISSET (fdlist[i].fd, fdlist[i].dir ? &rfds : &wfds))
	    {
	      assert (n);
	      n--;
	      any = 1;
	      (*fdlist[i].fnc) (fdlist[i].fnc_data, fdlist[i].fd);
	    }
	}
    }
  return any;
}

int
my_wait (void)
{
  int n;

  do
    {
      n = do_select ();
    }
  while (n >= 0 && !op_result.done);
  return 0;
}


struct gpgme_io_cbs io_cbs =
  {
    add_io_cb,
    fdlist,
    remove_io_cb,
    io_event,
    &op_result
  };


int 
main (int argc, char *argv[])
{
  gpgme_ctx_t ctx;
  gpgme_error_t err;
  gpgme_data_t in, out;
  gpgme_user_id_t rset = NULL;
  gpgme_user_id_t *rset_lastp = &rset;
  int i;

  for (i = 0; i < FDLIST_MAX; i++)
    fdlist[i].fd = -1;

  err = gpgme_engine_check_version (GPGME_PROTOCOL_OpenPGP);
  fail_if_err (err);

  err = gpgme_new (&ctx);
  fail_if_err (err);
  gpgme_set_armor (ctx, 1);
  gpgme_set_io_cbs (ctx, &io_cbs);
  op_result.done = 0;

  err = gpgme_data_new_from_mem (&in, "Hallo Leute\n", 12, 0);
  fail_if_err (err);

  err = gpgme_data_new (&out);
  fail_if_err (err);

  err = gpgme_user_ids_append (rset_lastp, "Alpha");
  fail_if_err (err);
  (*rset_lastp)->validity = GPGME_VALIDITY_FULL;

  rset_lastp = &(*rset_lastp)->next;
  err = gpgme_user_ids_append (rset_lastp, "Bob");
  fail_if_err (err);
  (*rset_lastp)->validity = GPGME_VALIDITY_FULL;

  err = gpgme_op_encrypt_start (ctx, rset, in, out);
  fail_if_err (err);

  my_wait ();
  fail_if_err (op_result.err);
  fail_if_err (err);

  fflush (NULL);
  fputs ("Begin Result:\n", stdout);
  print_data (out);
  fputs ("End Result.\n", stdout);
   
  gpgme_user_ids_release (rset);
  gpgme_data_release (in);
  gpgme_data_release (out);
  gpgme_release (ctx);

  return 0;
}