Objid.cc

/******************************************************************************
 * Copyright (c) 2000-2016 Ericsson Telecom AB
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   Balasko, Jeno
 *   Baranyi, Botond
 *   Beres, Szabolcs
 *   Delic, Adam
 *   Forstner, Matyas
 *   Kovacs, Ferenc
 *   Raduly, Csaba
 *   Szabados, Kristof
 *   Szabo, Bence Janos
 *   Szabo, Janos Zoltan – initial implementation
 *   Szalai, Gabor
 *   Tatarka, Gabor
 *
 ******************************************************************************/
#include "Objid.hh"

#include "../common/dbgnew.hh"
#include <errno.h>
#include <limits.h>
#include "../common/static_check.h"
#include "Integer.hh"

static const size_t MIN_COMPONENTS = 2;

struct OBJID::objid_struct {
  unsigned int ref_count;
  int n_components; ///< number of elements in \a components_ptr (min. 2)
  int overflow_idx; ///< index of the first overflow, or -1
  objid_element components_ptr[MIN_COMPONENTS];
};

#define OBJID_FMT "%u"
//#define OBJID_FMT "%lu"

void OBJID::init_struct(int n_components)
{
  if (n_components < 0) {
    val_ptr = NULL;
    TTCN_error("Initializing an objid value with a negative number of "
      "components.");
  }
  // TODO check n_components >= 2
  val_ptr = (objid_struct*)Malloc(sizeof(objid_struct)
    + (n_components - MIN_COMPONENTS) * sizeof(objid_element));
  val_ptr->ref_count = 1;
  val_ptr->n_components = n_components;
  val_ptr->overflow_idx = -1;
}

void OBJID::copy_value()
{
  if (val_ptr != NULL && val_ptr->ref_count > 1) {
    objid_struct *old_ptr = val_ptr;
    old_ptr->ref_count--;
    init_struct(old_ptr->n_components); // val_ptr reallocated
    memcpy(val_ptr->components_ptr, old_ptr->components_ptr,
           old_ptr->n_components * sizeof(objid_element));
    val_ptr->overflow_idx = old_ptr->overflow_idx;
  }
}

void OBJID::clean_up()