Seluj78/Minishell

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_atoi.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: jlasne <marvin@42.fr>                      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2016/11/28 11:07:23 by jlasne            #+#    #+#             */
/*   Updated: 2016/11/28 11:07:25 by jlasne           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

static int        ft_strlen_nb(char *str)
{
    int        i;

    i = -1;
    while (ft_isdigit(str[++i]))
        ;
    return (i);
}

int                ft_atoi(const char *str)
{
    int    neg;
    int    cpt;
    int    n;

    n = 0;
    neg = 0;
    cpt = 0;
    while (str[cpt] == ' ' || str[cpt] == '\t' || str[cpt] == '\r' ||
        str[cpt] == '\n' || str[cpt] == '\v' || str[cpt] == '\f')
        cpt++;
    if (str[cpt] == '-')
        neg = 1;
    if (str[cpt] == '+' || str[cpt] == '-')
        cpt++;
    while (str[cpt] >= '0' && str[cpt] <= '9')
    {
        n = n * 10;
        n = n + (str[cpt] - 48);
        cpt++;
    }
    return (neg == 0 ? n : -n);
}

double            ft_atoid(char *str)
{
    double    result;
    int        i;
    char    *a;

    i = -1;
    a = NULL;
    result = 0;
    while (str[++i] != '.')
    {
        if (str[i] == '\0')
            return (ft_atoi(str));
    }
    a = &str[i + 1];
    i = -1;
    if (!ft_strisdigit(&a[++i]))
        ft_atoi(str);
    result = ft_atoi(str);
    if (result < 0)
        result -= (double)ft_atoi(a) / (double)ft_power(10, ft_strlen_nb(a));
    else
        result += (double)ft_atoi(a) / (double)ft_power(10, ft_strlen_nb(a));
    return (result);
}