/*

 * Copyright (C) 2011 OpenSIPS Solutions

 *

 * This file is part of opensips, a free SIP server.

 *

 * opensips 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.

 *

 * opensips 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

 *

 *

 * history:

 * ---------

 *  2011-05-xx  created (razvancrainea)

 */

#include "evi_params.h"

#include "../mem/mem.h"

#include "../mem/shm_mem.h"

#include <string.h>

/* creates an element and links it to the parameters list

 * but without populating the parameter value */

evi_param_p evi_param_create(evi_params_p list, const str *name)

{

  evi_param_p new_p;

  if (!list) {

    LM_ERR("invalid param list\n");

    return 0;

  }

  new_p = pkg_malloc(sizeof(evi_param_t));

  if (!new_p) {

    LM_ERR("no more pkg mem for new parameter\n");

    return 0;

  }

  memset(new_p, 0, sizeof(evi_param_t));

  if (name)

    new_p->name = *name;

  new_p->next = NULL;

  if (list->last) {

    list->last->next = new_p;

    list->last = new_p;

  } else {

    list->last = list->first = new_p;

  }

  return new_p;

}

int evi_param_set(evi_param_p el, const void *param, int flags)

{

  if (!el) {

    LM_ERR("no parameter specified\n");

    return 1;

  }

  if (!(flags & (EVI_INT_VAL|EVI_STR_VAL))) {

    LM_ERR("params should be int or str [%x]\n", flags);

    return -1;

  }

  el->flags = flags;

  if (flags & EVI_INT_VAL) {

    el->val.n = *((int*)param);

    LM_DBG("set int %.*s=%d\n", el->name.len, el->name.s,

           el->val.n);

  } else {

    memcpy(&el->val, param, sizeof(str));

    LM_DBG("set str %.*s='%.*s'\n", el->name.len, el->name.s,

           el->val.s.len, el->val.s.s);

  }

  return 0;

}

void evi_param_reset(evi_param_p el)

{

  if (!el)

    return;

  el->flags = 0;

  el->val.s.s = NULL;

  el->val.s.len = 0;

}

/* adds a new parameter to the list */

int evi_param_add(evi_params_p list, const str *name, const void *param, int flags)

{

  evi_param_p new_p;

  if (!(EVI_INT_VAL & flags) && !(EVI_STR_VAL & flags)) {

    LM_ERR("params should be int or str [%x]\n", flags);

    return -1;

  }

  new_p = evi_param_create(list, name);

  if (!new_p) {

    LM_ERR("cannot create parameter\n");

    return -1;

  }

  if (evi_param_set(new_p, param, flags) < 0) {

    LM_ERR("cannot set the parameter value\n");

    return -1;

  }

  return 0;

}

/* allocs a new structure and initializes it with 0 */

evi_params_p evi_get_params(void)

{

  evi_params_p new_list = pkg_malloc(sizeof(evi_params_t));

  if (!new_list) {

    LM_ERR("no more pkg memory for the list\n");

    return NULL;

  }

  memset(new_list, 0, sizeof(evi_params_t));

  /* used to remember to free it */

  new_list->flags = EVI_FREE_LIST;

  return new_list;

}

/* frees a parameters list */

void evi_free_params(evi_params_p list)

{

  evi_param_p node, nxt;

  if (!list)

    return;

  for (node = list->first; node; node = nxt) {

    nxt = node->next;

    pkg_free(node);

  }

  list->first = list->last = NULL;

  /* list should be freed */

  pkg_free(list);

}

evi_params_p evi_dup_shm_params(evi_params_p pkg_params)

{

  int parambufs_size, strbufs_size;

  evi_params_p shm_params;

  evi_param_p param, prev, sp;

  char *p;

  if(!pkg_params)

    return NULL;

  parambufs_size = sizeof(evi_params_t);

  strbufs_size = 0;

  for (param = pkg_params->first; param; param = param->next) {

    parambufs_size += sizeof(evi_param_t);

    strbufs_size += param->name.len;

    if (param->flags & EVI_STR_VAL)

      strbufs_size += param->val.s.len;

  }

  shm_params = shm_malloc(parambufs_size + strbufs_size);

  if (!shm_params) {

    return NULL;

  }

  shm_params->flags = 0;

  sp = (evi_param_p)(shm_params + 1);

  p = (char *)(shm_params) + parambufs_size;

  for (param = pkg_params->first, prev = NULL; param;

      prev = sp++, param = param->next) {

    sp->flags = param->flags;

    sp->next = NULL;

    sp->name.len = param->name.len;

    if (sp->name.len) {

      sp->name.s = p;

      p += param->name.len;

      memcpy(sp->name.s, param->name.s, param->name.len);

    }

    if (param->flags & EVI_STR_VAL) {

      sp->val.s.len = param->val.s.len;

      sp->val.s.s = p;

      p += param->val.s.len;

      memcpy(sp->val.s.s, param->val.s.s, param->val.s.len);

    } else

      sp->val.n = param->val.n;

    if (prev) {

      prev->next = sp;

      shm_params->last = sp;

    } else

      shm_params->first = sp;

  }

  return shm_params;

}

void evi_free_shm_params(evi_params_p shm_params)

{

  shm_free(shm_params);

}