Extraction d'informations depuis un fichier de données en C

Ouvrir fichier
   Tant que ligne <> NIL lire ligne fichier
      Si caractère 0 de ligne égal à '{'
         alors ouvrir bloc
         sinon si bloc ouvert
            Si recherche label égal à "name"
               alors
                  Récupérer l'âge
                  Récupérer l'adresse
                  Récupérer le téléphone
            Fsi
      Fsi
   Fin tant que
Fermer fichier

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define BEGIN        '{'
#define SEP          ':'
#define BUF_SIZE     128
#define FILENAME     "perso.txt"

#define TAG_NAME     "name"
#define TAG_AGE      "age"
#define TAG_ADRESS   "address"
#define TAG_PHONE    "phone"

{
   name:Pascal Antoine
   age:25
   address:10 rue du General Leclerc, 67000 Strasbourg
   phone:0622325418
}

{
   name:Franck.H
   age:32
   address:16 rue du General de Gaulle, 67000 Strasbourg
   phone:0618325015
}

{
   name:Alain DuPont
   age:21
   address:120 Bld Clemenceau, 67000 Strasbourg
   phone:0615256978
}

#include <stdio.h>
#include <stdlib.h>
#include <string.h>


#define BEGIN        '{'
#define SEP          ':'
#define BUF_SIZE     128
#define FILENAME     "perso.txt"

#define TAG_NAME     "name"
#define TAG_AGE      "age"
#define TAG_ADRESS   "address"
#define TAG_PHONE    "phone"


typedef struct
{
   char *   name;
   char *   adress;
   char *   phone;
   int      age;
}
contact_infos;


typedef enum
{
   NAME,
   AGE,
   ADDRESS,
   PHONE,

   NB_TAG
}
contact_tags;


static char * str_dup (const char * str)
{
   char * dup = NULL;


   if (str != NULL)
   {
      size_t size = strlen (str) + 1;
      dup = malloc (size);

      if (dup != NULL)
      {
         memcpy (dup, str, size);
      }
   }


   return dup;
}


static void str_finalize (char * str)
{
   char * p = strchr (str, '\n');

   if (p != NULL)
   {
      *p = 0;
   }
}


static void get (contact_infos * p, FILE * file, contact_tags tag)
{
   char     buff  [BUF_SIZE];
   char *   s     = NULL;


   fgets (buff, BUF_SIZE, file);

   s = strchr (buff, SEP);

   if (s != NULL)
   {
      s++;
      str_finalize (s);

      switch (tag)
      {
         case AGE:
         {
            p->age = strtol (s, NULL, 10);
         }
         break;

         case ADDRESS:
         {
            p->adress = str_dup (s);
         }
         break;

         case PHONE:
         {
            p->phone = str_dup (s);
         }
         break;

         default:
            break;
      }
   }
}


static contact_infos * get_info (const char * contact_name)
{
   contact_infos  *  ret;
   FILE           *  file     = NULL;
   char              buff     [BUF_SIZE];
   int               opened   = 0;


   file = fopen (FILENAME, "r");

   if (file != NULL)
   {
      while ((fgets (buff, BUF_SIZE, file) != NULL))
      {
         if (buff[0] == BEGIN && !opened)
         {
            opened = 1;
         }
         else if (opened)
         {
            char * s = strstr (buff, TAG_NAME);

            if (s != NULL)
            {
               s += strlen (TAG_NAME) + 1;
               str_finalize (s);

               if (strcmp (s, contact_name) == 0)
               {
                  ret = malloc (sizeof (* ret));

                  if (ret != NULL)
                  {
                     ret->name = str_dup (s);

                     get (ret, file, AGE);
                     get (ret, file, ADDRESS);
                     get (ret, file, PHONE);
                  }

                  break;
               }
               else
               {
                  opened = 0;
               }
            }
         }
      }

      fclose (file);
   }


   return ret;
}


static void contact_infos_free (contact_infos ** p)
{
   if (p != NULL && *p != NULL)
   {
      free ((*p)->name);
      free ((*p)->adress);
      free ((*p)->phone);

      free (*p);
      *p = NULL;
   }
}


int main (void)
{
   contact_infos * info = get_info ("Franck.H");

   printf (
      "%s\n%d\n%s\n%s\n\n",
      info->name, info->âge, info->adress, info->phone
   );

   contact_infos_free (& info);


   return EXIT_SUCCESS;
}

Franck.H
32
16 rue du General de Gaulle, 67000 Strasbourg
0618325015