blob: 03d794bfa7212768fedabbeb9b0a224953a82fc3 (
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
62
63
64
|
/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_itoa.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: cacharle <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2019/10/07 10:19:56 by cacharle #+# #+# */
/* Updated: 2019/11/20 01:15:40 by cacharle ### ########.fr */
/* */
/* ************************************************************************** */
#include <stdlib.h>
static int count_len(int nbr)
{
int counter;
unsigned int u_nbr;
if (nbr == 0)
return (1);
counter = 0;
u_nbr = nbr;
if (nbr < 0)
{
counter++;
u_nbr = -nbr;
}
while (u_nbr > 0)
{
u_nbr /= 10;
counter++;
}
return (counter);
}
char *ft_itoa(int n)
{
char *str;
int len;
int is_negative;
unsigned int u_nbr;
len = count_len(n);
if ((str = (char*)malloc(sizeof(char) * (len + 1))) == NULL)
return (NULL);
str[len] = '\0';
is_negative = 0;
u_nbr = n;
if (n < 0)
{
is_negative = 1;
str[0] = '-';
u_nbr = -n;
}
len--;
while (len >= (is_negative ? 1 : 0))
{
str[len] = (u_nbr % 10) | 0x30;
u_nbr /= 10;
len--;
}
return (str);
}
|
