cub3D/utils/ft_utils_convert.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_utils_convert.c                                 :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: fgras-ca <fgras-ca@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/01/11 22:21:26 by fgras-ca          #+#    #+#             */
/*   Updated: 2024/01/16 16:46:23 by fgras-ca         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "../cub3d.h"

static size_t	ft_intlen(long n)
{
	size_t	len;

	len = 0;
	if (n == 0)
		len++;
	if (n < 0)
	{
		n *= -1;
		len++;
	}
	while (n > 0)
	{
		n = n / 10;
		len++;
	}
	return (len);
}

char	*ft_itoa(int nb)
{
	char	*dst;
	int		i;
	long	n;

	n = nb;
	i = ft_intlen(n);
	dst = (char *)malloc((i + 1) * sizeof(char));
	if (!dst)
		return (NULL);
	dst[i--] = '\0';
	if (n == 0)
		dst[0] = '0';
	if (n < 0)
	{
		dst[0] = '-';
		n = n * -1;
	}
	while (n > 0)
	{
		dst[i] = '0' + (n % 10);
		n = n / 10;
		i--;
	}
	return (dst);
}

int	ft_strcmp(const char *s1, const char *s2)
{
	while (*s1 && (*s1 == *s2))
	{
		s1++;
		s2++;
	}
	return (*(const unsigned char *)s1 - *(const unsigned char *)s2);
}

void	*ft_memcpy(void *dest, const void *src, size_t n)
{
	char	*destmov;
	char	*srcmov;
	size_t	i;

	destmov = (char *)dest;
	srcmov = (char *)src;
	if (!dest && !src)
		return (0);
	i = 0;
	while (i < n)
	{
		destmov[i] = srcmov[i];
		i++;
	}
	return (dest);
}

void	*ft_memset(void *s, int c, size_t n)
{
	size_t	i;

	i = 0;
	while (i < n)
	{
		*(unsigned char *)(s + i) = (unsigned char)c;
		i++;
	}
	return (s);
}