/*

 * Copyright (C) 2006 voice-system.ro

 *

 * 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

 *

 */

/*!

 * \file

 * \brief Script variables

 */

#include <assert.h>

#include <ctype.h>

#include <string.h>

#include <stdlib.h>

#include "dprint.h"

#include "mem/mem.h"

#include "script_var.h"

static script_var_t *script_vars = 0;

script_var_t* add_var(const str *name)

{

  script_var_t *it;

  if(name==0 || name->s==0 || name->len<=0)

    return 0;

  for(it=script_vars; it; it=it->next)

  {

    if(it->name.len==name->len

        && strncmp(name->s, it->name.s, name->len)==0)

      return it;

  }

  it = (script_var_t*)pkg_malloc(sizeof(script_var_t));

  if(it==0)

  {

    LM_ERR("out of pkg mem\n");

    return 0;

  }

  memset(it, 0, sizeof(script_var_t));

  it->name.s = (char*)pkg_malloc((name->len+1)*sizeof(char));

  it->v.flags = VAR_VAL_NULL;

  if(it->name.s==0)

  {

    LM_ERR("out of pkg mem!\n");

    return 0;

  }

  it->name.len = name->len;

  strncpy(it->name.s, name->s, name->len);

  it->name.s[it->name.len] = '\0';

  it->next = script_vars;

  script_vars = it;

  return it;

}

script_var_t* set_var_value(script_var_t* var, int_str *value, int flags)

{

  if(var==0)

    return 0;

  if(value==NULL || flags&VAR_VAL_NULL)

  {

    if(var->v.flags&VAR_VAL_STR)

      pkg_free(var->v.value.s.s);

    memset(&var->v.value, 0, sizeof(int_str));

    var->v.flags = VAR_VAL_NULL;

    return var;

  }

  if(flags&VAR_VAL_STR)

  {

    if(var->v.flags&VAR_VAL_STR)

    { /* old and new values are str */

      if(value->s.len>var->v.value.s.len)

      { /* not enough space to copy */

        pkg_free(var->v.value.s.s);

        memset(&var->v.value, 0, sizeof(int_str));

        var->v.value.s.s =

          (char*)pkg_malloc((value->s.len+1)*sizeof(char));

        if(var->v.value.s.s==0)

        {

          LM_ERR("out of pkg mem\n");

          goto error;

        }

      }

    } else {

      /* old value was INT or NULL */

      memset(&var->v.value, 0, sizeof(int_str));

      var->v.value.s.s =

          (char*)pkg_malloc((value->s.len+1)*sizeof(char));

      if(var->v.value.s.s==0)

      {

        LM_ERR("out of pkg mem!\n");

        goto error;

      }

      var->v.flags = VAR_VAL_STR;

    }

    memcpy(var->v.value.s.s, value->s.s, value->s.len);

    var->v.value.s.len = value->s.len;

    var->v.value.s.s[value->s.len] = '\0';

  } else {

    /* new value is INT */

    if(var->v.flags&VAR_VAL_STR)

    {

      pkg_free(var->v.value.s.s);

      memset(&var->v.value, 0, sizeof(int_str));

    }

    var->v.flags = 0; /* no STR, no NULL */

    var->v.value.n = value->n;

  }

  return var;

error:

  /* set the var to init value */

  memset(&var->v.value, 0, sizeof(int_str));

  var->v.flags = VAR_VAL_NULL;

  return NULL;

}

script_var_t* get_var_by_name(str *name)

{

  script_var_t *it;

  if(name==0 || name->s==0 || name->len<=0)

    return 0;

  for(it=script_vars; it; it=it->next)

  {

    if(it->name.len==name->len

        && strncmp(name->s, it->name.s, name->len)==0)

      return it;

  }

  return 0;

}

void reset_vars(void)

{

  script_var_t *it;

  for(it=script_vars; it; it=it->next)

  {

    if(it->v.flags&VAR_VAL_STR)

      pkg_free(it->v.value.s.s);

    it->v.flags = VAR_VAL_NULL ;

    memset(&it->v.value, 0, sizeof(int_str));

  }

}

void destroy_vars_list(script_var_t *svl)

{

  script_var_t *it;

  script_var_t *it0;

  it = svl;

  while(it)

  {

    it0 = it;

    it = it->next;

    pkg_free(it0->name.s);

    if(it0->v.flags&VAR_VAL_STR)

      pkg_free(it0->v.value.s.s);

    pkg_free(it0);

  }

  svl = 0;

}

void destroy_vars(void)

{

  destroy_vars_list(script_vars);

}