ft_printf/ft_printf_utils.c at main · maelgini/ft_printf · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_printf_utils.c                                  :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: maelgini <maelgini@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/11/08 13:49:01 by maelgini          #+#    #+#             */
/*   Updated: 2025/01/27 17:30:50 by maelgini         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "ft_printf.h"

void	ft_putchar(char c)
{
	write(1, &c, 1);
}

size_t	ft_strlen(const char *s)
{
	int	i;

	i = 0;
	while (s[i])
		i++;
	return (i);
}

int	get_num_size(int n)
{
	int	len;

	len = 1;
	while (n / 10)
	{
		n /= 10;
		len++;
	}
	return (len);
}

char	*ft_itoa(int n)
{
	char	*str;
	long	nb;
	int		len;

	nb = n;
	len = get_num_size(n) + (n < 0);
	if (n < 0)
		nb = -nb;
	str = malloc(len + 1);
	if (!str)
		return (NULL);
	str[len] = '\0';
	while (--len >= 0)
	{
		str[len] = nb % 10 + '0';
		nb /= 10;
	}
	if (n < 0)
		str[0] = '-';
	return (str);
}