long LogOpen( char *filename, __int64 *filelen )
{
long fileHandle;
fileHandle = LogOpenQuiet( filename, filelen );
if( !fileHandle )
ErrorOpeningFile( filename );
return fileHandle;
}
void Flush2File (struct nodo ** list)
{
/* flushes all the items in the linked list into a file */
struct nodo * act = NULL;
FILE * fp;
int choice;
if (! *list)
return;
act = *list;
printf("\n\n1 - New File");
printf("\n2 - Append Data");
CHOICE (choice);
if (choice == 1)
{
/* we delete all the contents of the file and open it to write */
if ((fp = fopen("dlist.bin", "wb")) == NULL)
{
ErrorOpeningFile();
return;
}
}
else
{
/* we open the file to append data */
if ((fp = fopen("dlist.bin", "ab")) == NULL)
{
ErrorOpeningFile();
return;
}
}
/* while we have a node pointing to a differnt address than NULL... */
while (act)
{
/* now we write into the file each node of the linked list */
fwrite (act, sizeof (struct nodo), 1, fp);
act = act->next;
}
fclose(fp);
printf("\n\nData was flushed into \'dlist.bin\'. Press any key to continue...");
getch();
}
void ReadFile (struct nodo ** list)
{
/* creates a new linked list from data in 'dlist.bin'
deleting all repeated entries, filtering by nodo->nclient */
struct nodo * aux = NULL;
FILE * fp;
int sizenodo = sizeof(struct nodo);
/* first we make sure to free all the memory used by the list
since we are going to create a new one */
FreeAll (list);
*list = NULL;
if ((fp = fopen("dlist.bin", "rb")) == NULL)
{
ErrorOpeningFile();
return;
}
/* we read the first record on the file and we add it to the
beginning of the list */
aux = (struct nodo *) malloc (sizenodo);
fread(aux, sizenodo, 1, fp);
AddBegin (list, aux);
/* we do the loop while we are not in the end of file */
while (!feof(fp))
{
aux = (struct nodo *) malloc (sizeof(struct nodo));
if(fread(aux, sizenodo, 1, fp))
{
/* if nclient does not exist in our list then
we add the node to the list */
if (!NumberExists(list, aux->nclient))
AddBetween(list, aux);
else
/* since I did not add the item to the list
I free the memory used by it */
free (aux);
}
}
free (aux);
printf("Data was read from \'dlist.bin\' and Double Linked List was created.\nPress any key to continue...");
getch();
}
