-
Notifications
You must be signed in to change notification settings - Fork 0
/
ft_calloc.c
108 lines (99 loc) · 2.94 KB
/
ft_calloc.c
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
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_calloc.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: akyoshid <akyoshid@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2023/11/19 07:53:01 by akyoshid #+# #+# */
/* Updated: 2023/11/19 09:45:44 by akyoshid ### ########.fr */
/* */
/* ************************************************************************** */
// === DESCRIPTION ===
// Contiguously allocates enough space for count objects that
// are size bytes of memory each and returns a pointer to the allocated memory.
// The allocated memory is filled with bytes of value zero.
// === CAUTION ===
// if (count == 0 || size == 0) → Return 1 byte of memory initialized to 0.
// If count * size exceeds SIZE_MAX → Return NULL.
#include "libft.h"
void *ft_calloc(size_t count, size_t size)
{
void *ptr;
if (count == 0 || size == 0)
{
count = 1;
size = 1;
}
if (count > SIZE_MAX / size)
return (NULL);
ptr = malloc(count * size);
if (ptr != NULL)
ft_bzero(ptr, count * size);
return (ptr);
}
// int main(void)
// {
// char *str;
// size_t count;
// size_t size;
// size_t i;
// count = 10;
// // count = 0;
// size = sizeof(char);
// // size = 0;
// str = ft_calloc(count, size);
// // str = calloc(count, size);
// if (count == 0 || size == 0)
// {
// // not cause segfalut
// printf ("value of str[0] : %d\n", str[0]);
// // // cause segfalut
// // printf ("value of str[0] : %d\n", str[0]);
// // printf ("value of str[1] : %d\n", str[1]);
// }
// else
// {
// i = 0;
// // not cause segfalut
// while (i / size < count)
// {
// printf ("value of str[%zu] : %d\n", i, str[i]);
// i++;
// }
// // // cause segfalut
// // while (i < count * size + 1)
// // {
// // printf ("value of str[%zu] : %d\n", i, str[i]);
// // i++;
// // }
// }
// free(str);
// return (0);
// }
// int main(void)
// {
// size_t count;
// void *ptr1;
// void *ptr2;
// count = SIZE_MAX;
// ptr1 = ft_calloc(count, 2);
// ptr2 = calloc(count, 2);
// if (ptr1 != NULL && ptr2 != NULL)
// {
// printf("Test failed : Both didn't behave as expected.\n");
// return (1);
// }
// if (ptr1 != NULL)
// {
// printf("Test failed : ft_calloc didn't behave as expected.\n");
// return (1);
// }
// if (ptr2 != NULL)
// {
// printf("Test failed : calloc didn't behave as expected.\n");
// return (1);
// }
// printf("Test passed: Both calloc and ft_calloc behaved as expected.\n");
// return (0);
// }