blob: 1986a093e5e2ce2e39cf5a8396f2c96ebd67ec07 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
#include <stdio.h>
#include <stdlib.h>
#include "fifo.h"
size_t fifo_size(struct fifo *fifo)
{
return fifo->size;
}
void fifo_push(struct fifo *fifo, struct token *elt)
{
struct list *new = malloc(sizeof(struct list));
if (new == NULL)
{
return;
}
new->data = elt;
if (fifo_size(fifo) == 0)
{
fifo->head = new;
}
new->next = NULL;
if (fifo_size(fifo) != 0)
{
fifo->tail->next = new;
}
fifo->tail = new;
fifo->size++;
}
struct token *fifo_head(struct fifo *fifo)
{
return fifo->head->data;
}
void fifo_pop(struct fifo *fifo)
{
if (fifo_size(fifo) == 0)
{
return;
}
if (fifo_size(fifo) == 1)
{
free(fifo->head->data);
free(fifo->head);
fifo->head = NULL;
fifo->tail = NULL;
fifo->size = 0;
return;
}
struct list *tmp = fifo->head->next;
free(fifo->head->data);
free(fifo->head);
fifo->head = tmp;
fifo->size--;
}
|
