Code:
/****************************************************************************
* Loads all data into the system.
****************************************************************************/
int loadData(GJCType* menu, char* menuFile, char* submenuFile)
{
drinkType *currentCat, *prevCat, *newCat, *begin, *end, *var;
ItemType *currentItem, *prevItem, *newItem;
FILE *fp1;
FILE *fp2;
char *token, *line;
char array[BUFFER_SIZE + 2];
double d;
unsigned doll;
int i;
char nc_array[NC_ARRAY_SIZE + 1];
/* Open menu file for reading. */
fp1 = fopen(menuFile, "r");
/* check if fp1 menu file exists*/
if(fp1 == NULL)
{
printf("file %s does not exist \n", menuFile);
exit(0);
}
/* initialize the previous node to NULL*/
/*prevCat = NULL;*/
while((line = fgets(array, BUFFER_SIZE + 2, fp1)) != NULL)
{
/* allocate memory for CategoryType pointer*/
newCat = malloc(sizeof(drinkType));
/* check if memory allocation succeeded if fails exit*/
if(newCat == NULL)
{
printf("Memory Allocation error for newCat\n");
exit(0);
}
/* if the prevCat is NULL point the new node to the
start of the list*/
/* if(prevCat == NULL)
{
menu->headCategory = newCat;
}*/
/* if it isnt at the start get the next -1node*/
/* else
{
prevCat->nextCategory = newCat;
}*/
/* tokenize the Pipe and copy the field
pointers into the struct*/
token = strtok(line, "|");
strcpy(newCat->categoryID, token);
token = strtok(NULL, "|");
newCat->drinkType = token[0];
token = strtok(NULL, "|");
strcpy(newCat->categoryName, token);
token = strtok(NULL, "|");
strcpy(newCat->categoryDescription, token);
/* initialize everything to a safe state*/
/*newCat->nextCategory = NULL;
newCat->headItem = NULL;
newCat->numItems = 0;
prevCat = newCat;*/
var->nextCategory = NULL;
var->headItem = NULL;
var->numItems = 0;
}
/* the current pointer points to headCategory*/
currentCat = menu->headCategory;
addSortedDrink(menu, begin, &end, &var);
/* for testing purposes traverse through the list
and print out linked list*/
/*
while(currentCat != NULL)
{
printf("\n%s, %c, %s, %s", currentCat->categoryID,
currentCat->drinkType,
currentCat->categoryName,
currentCat->categoryDescription);
*/
/* get the next row
currentCat = currentCat->nextCategory;
}*/
/* close the first pointer to the file*/
/* check if it can close it otherwise error*/
if(fclose(fp1)!=0)
{
fprintf(stderr, "cannot close file\n");
}
/* Open submenu file for reading. */
fp2 = fopen(submenuFile, "r");
/* check if sub menu file exists*/
if(fp2 == NULL)
{
printf("file %s does not exist \n", submenuFile);
exit(0);
}
/*intialize pointer to the start*/
prevItem = NULL;
currentCat = menu->headCategory;
while((line = fgets(array, BUFFER_SIZE + 2, fp2)) != NULL)
{
newItem = malloc(sizeof(ItemType));
token = strtok(line, "|");
strcpy(newItem->itemID, token);
token = strtok(NULL, "|");
strcpy(nc_array, token);
/* put the current pointer to the head of the list*/
currentCat = menu->headCategory;
/* while current is pointing to a node*/
while(currentCat != NULL)
{
if(strcmp(currentCat->categoryID, nc_array) == 0)
{
break;
}
currentCat = currentCat->nextCategory;
}
if(currentCat == NULL)
{
printf("NULL POINTER Error!!!\n");
}
else
{
token = strtok(NULL, "|");
strcpy(newItem->itemName, token);
/* store dollars into struct array*/
/* convert all prices to float when storing*/
for(i = 0; i < NUM_PRICES; i++)
{
token = strtok(NULL, "|");
d = atof(token);
doll = (unsigned) d;
newItem->prices[i].dollars = doll;
newItem->prices[i].cents = (d - doll) * 100;
}
token = strtok(NULL, "|");
strcpy(newItem->itemDescription, token);
/* from the start of the list*/
newItem->nextItem = currentCat->headItem;
currentCat->headItem = newItem;
/* increment the counter*/
currentCat->numItems ++;
}
}
currentCat = menu->headCategory;
/*
while(currentCat!= NULL)
{
currentItem = currentCat->headItem;
printf("Items for category %s\n", currentCat->categoryID);
while(currentItem != NULL)
{
printf("\n%s, %s, %s, %d.%d, %d.%d, %d.%d, %s\n",
currentItem->itemID, currentCat->categoryID,
currentItem->itemName, currentItem->prices[0].dollars,currentItem->prices[0].cents,
currentItem->prices[1].dollars, currentItem->prices[1].cents,
currentItem->prices[2].dollars, currentItem->prices[2].cents,
currentItem->itemDescription);
currentItem = currentItem->nextItem;
}
currentCat = currentCat->nextCategory;
}*/
/* try to close the file*/
/* if it wont close provide an error*/
if(fclose(fp2)!=0)
{
fprintf(stderr, "cannot close file\n");
}
return EXIT_SUCCESS;
}
void addSortedDrink(GJCType *menu,
drinkType *i,
drinkType **start,
drinkType **last)
{
drinkType *old, *p;
p = *start;
if(!*last)
{
i->nextCategory = NULL;
*last = i;
*start = i;
return;
}
old = NULL;
while(p)
{
if(strcmp(p->categoryName, i->categoryName)<0)
{
old = p;
p = p->nextCategory;
}
else
{
if(old)
{
old->nextCategory = i;
i->nextCategory = p;
return;
}
i->nextCategory = p;
*start = i;
return;
}
}
(*last)->nextCategory = i;
i->nextCategory = NULL;
*last = i;
}
ypedef struct category* CategoryTypePtr;
typedef struct item* ItemTypePtr;
/* Structure definitions. */
typedef struct price
{
unsigned dollars;
unsigned cents;
} PriceType;
typedef struct item
{
char itemID[ID_LEN + 1];
char itemName[MAX_NAME_LEN + 1];
PriceType prices[NUM_PRICES];
char itemDescription[MAX_DESC_LEN];
ItemTypePtr nextItem;
} ItemType;
typedef struct category
{
char categoryID[ID_LEN + 1];
char categoryName[MAX_NAME_LEN + 1];
char drinkType; /* (H)ot or (C)old. */
char categoryDescription[MAX_DESC_LEN];
CategoryTypePtr nextCategory;
ItemTypePtr headItem;
unsigned numItems;
} drinkType;
typedef struct gjc
{
CategoryTypePtr headCategory;
unsigned numCategories;
} GJCType;
int commandLineArguments(int argc, char *argv[]);
