tvdu29/libft
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

ft_atoi

Browse Source
This commit is contained in:
Tanguy MAZE
2018-04-05 14:29:46 +02:00
parent 9e7312327a
commit c4402c4b2d
3 changed files with 44 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

40
ft_atoi.c Normal file
View File

@@ -0,0 +1,40 @@
/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_atoi.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: tmaze <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2018/04/05 13:50:22 by tmaze #+# #+# */
/* Updated: 2018/04/05 14:24:13 by tmaze ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft.h"
int ft_atoi(const char *str)
{
int nbnum;
int mult;
int ret;
nbnum = 0;
while (str[nbnum] == ' ' || str[nbnum] == '\t' || str[nbnum] == '\n'\
|| str[nbnum] == '\v' || str[nbnum] == '\f' || str[nbnum] == '\r')
nbnum++;
if (str[nbnum] == '+' || str[nbnum] == '-')
nbnum++;
while (str[nbnum] != '\0' && str[nbnum] >= '0' && str[nbnum] <= '9')
nbnum++;
nbnum--;
ret = 0;
mult = 1;
while (nbnum >= 0 && (str[nbnum] >= '0' && str[nbnum] <= '9'))
{
ret += (str[nbnum--] - '0') * mult;
mult *= 10;
}
if (nbnum >= 0 && str[nbnum] == '-')
ret *= -1;
return (ret);
}