Char_ptr.cpp

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#include <Char_ptr.h>
 
#include <Motcle.h>
#include <string>
 
 
 
/*! @brief Default constructor.
 *
 * Creates the string "??"
 *
 */
Char_ptr::Char_ptr()
{
  nom_ = new char[3];
  nom_[0] = '?';
  nom_[1] = '?';
  nom_[2] = 0;
}
 
 
 
/*! @brief Constructs a name from a character string. The string is copied.
 *
 * @param (const char* nom) the character string to use
 */
Char_ptr::Char_ptr(const char* nom)
{
  nom_ = 0;
  operator=(nom);
}
 
/*! @brief Copy constructor of a name.
 *
 * @param (const Char_ptr& nom) the name to use
 */
Char_ptr::Char_ptr(const Char_ptr& nom)
{
  nom_ = 0;
  operator=(nom);
}
 
/*! @brief Destructor.
 *
 */
Char_ptr::~Char_ptr()
{
  if(nom_)
    delete[] nom_;
}
 
 
/*! @brief Returns the number of characters in the Char_ptr string including the terminating null character.
 *
 *     Example: Char_ptr("hello").longueur() == 6
 *
 */
int Char_ptr::longueur() const
{
  return ((int)strlen(nom_)+1);
}
 
/*! @brief Copies the string nom.
 *
 * Modified by BM so that nom can point to a sub-part of nom_
 *
 */
Char_ptr& Char_ptr::operator=(const char* const nom)
{
  if (nom_ == nom)
    return *this;
  char *old = nom_;
  const char *n = nom;
  if (!n)
    n = "??";
  nom_ = new char[strlen(n)+1];
  strcpy(nom_, n);
  // Delete the old after copying the new one, in case nom is a part of nom_
  delete [] old;
  return *this;
}
 
/*! @brief Copies the Char_ptr nom.
 *
 * @param (const Char_ptr& nom) the name to copy
 * @return (Char_ptr&) reference to this, representing the string of Char_ptr nom
 */
Char_ptr& Char_ptr::operator=(const Char_ptr& nom)
{
  operator=(nom.nom_);
  return *this;
}
 
/*! @brief Returns a pointer to the character string of the name.
 *
 * @return (char*) pointer to the character string of the name
 */
Char_ptr::operator char*() const
{
  return nom_;
}
 
 
void Char_ptr::allocate(int n)
{
  if (nom_)
    delete [] nom_;
  nom_=new char[n+1];
  for (int i=0; i<n; i++)
    nom_[i]=' ';
  nom_[n]='\0';
}