lib/libalpm/trans.c


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/*
 *  trans.c
 * 
 *  Copyright (c) 2002-2005 by Judd Vinet <jvinet@zeroflux.org>
 * 
 *  This program 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.
 *
 *  This program 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 this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 
 *  USA.
 */

#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
/* pacman */
#include "error.h"
#include "package.h"
#include "util.h"
#include "list.h"
#include "handle.h"
#include "add.h"
#include "remove.h"
#include "sync.h"
#include "alpm.h"

extern pmhandle_t *handle;

pmtrans_t *trans_new()
{
  pmtrans_t *trans;

  if((trans = (pmtrans_t *)malloc(sizeof(pmtrans_t))) == NULL) {
    return(NULL);
  }

  trans->targets = NULL;
  trans->packages = NULL;
  trans->type = 0;
  trans->flags = 0;
  trans->cb = NULL;
  trans->state = STATE_IDLE;

  return(trans);
}

void trans_free(pmtrans_t *trans)
{
  if(trans == NULL) {
    return;
  }

  FREELIST(trans->targets);
  FREELISTPKGS(trans->packages);

  free(trans);
}

int trans_init(pmtrans_t *trans, unsigned char type, unsigned char flags, alpm_trans_cb cb)
{
  /* Sanity checks */
  if(trans == NULL) {
    PM_RET_ERR(PM_ERR_TRANS_NULL, -1);
  }

  /* ORE
  perform sanity checks on type and flags:
  for instance, we can't set UPGRADE and FRESHEN at the same time */

  trans->type = type;
  trans->flags = flags;
  trans->cb = cb;
  trans->state = STATE_INITIALIZED;

  return(0);
}

int trans_addtarget(pmtrans_t *trans, char *target)
{
  /* Sanity checks */
  ASSERT(trans != NULL, PM_RET_ERR(PM_ERR_TRANS_NULL, -1));
  ASSERT(target != NULL, PM_RET_ERR(PM_ERR_WRONG_ARGS, -1));

  if(pm_list_is_strin(target, trans->targets)) {
    PM_RET_ERR(PM_ERR_TRANS_DUP_TARGET, -1);
  }

  switch(trans->type) {
    case PM_TRANS_TYPE_ADD:
    case PM_TRANS_TYPE_UPGRADE:
      if(add_loadtarget(handle->db_local, trans, target) == -1) {
        /* pm_errno is set by add_loadtarget() */
        return(-1);
      }
    break;
    case PM_TRANS_TYPE_REMOVE:
      if(remove_loadtarget(handle->db_local, trans, target) == -1) {
        /* pm_errno is set by remove_loadtarget() */
        return(-1);
      }
    break;
  }
  trans->targets = pm_list_add(trans->targets, strdup(target));
  trans->state = STATE_INITIALIZED;

  return(0);
}

int trans_prepare(pmtrans_t *trans, PMList **data)
{
  *data = NULL;

  /* Sanity checks */
  ASSERT(trans != NULL, PM_RET_ERR(PM_ERR_WRONG_ARGS, -1));

  ASSERT(trans->packages != NULL, return(0));

  switch(trans->type) {
    case PM_TRANS_TYPE_ADD:
    case PM_TRANS_TYPE_UPGRADE:
      if(add_prepare(handle->db_local, trans, data) == -1) {
        /* pm_errno is set by add_prepare() */
        return(-1);
      }
    break;
    case PM_TRANS_TYPE_REMOVE:
      if(remove_prepare(handle->db_local, trans, data) == -1) {
        /* pm_errno is set by remove_prepare() */
        return(-1);
      }
    break;
    case PM_TRANS_TYPE_SYNC:
      if(sync_prepare(handle->db_local, trans, data) == -1) {
        /* pm_errno is set by sync_prepare() */
        return(-1);
      }
    break;
  }

  trans->state = STATE_PREPARED;

  return(0);
}

int trans_commit(pmtrans_t *trans)
{
  /* Sanity checks */
  ASSERT(trans != NULL, PM_RET_ERR(PM_ERR_WRONG_ARGS, -1));

  /* If there's nothing to do, return without complaining */
  ASSERT(trans->packages != NULL, return(0));

  switch(trans->type) {
    case PM_TRANS_TYPE_ADD:
    case PM_TRANS_TYPE_UPGRADE:
      if(add_commit(handle->db_local, trans) == -1) {
        return(-1);
      }
    break;
    case PM_TRANS_TYPE_REMOVE:
      if(remove_commit(handle->db_local, trans) == -1) {
        return(-1);
      }
    break;
    case PM_TRANS_TYPE_SYNC:
      if(sync_commit(handle->db_local, trans) == -1) {
        return(-1);
      }
    break;
  }

  trans->state = STATE_COMMITED;

  return(0);
}

/* vim: set ts=2 sw=2 noet: */