ft_strlcat.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strlcat.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: ibeliaie <ibeliaie@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/05/16 16:05:09 by ibeliaie          #+#    #+#             */
/*   Updated: 2023/05/18 17:22:18 by ibeliaie         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

/* safely combine 2 strings, preventing buffer overflow */
size_t	ft_strlcat(char *dst, const char *src, size_t dstsize)
{
	size_t	i;
	size_t	j;

	i = 0;
	j = 0;
	while (dst[i] && i < dstsize)
		i++;
	while (src[j] && (i + j + 1) < dstsize)
	{
		dst[i + j] = src[j];
		j++;
	}
	if (i < dstsize)
		dst[i + j] = '\0';
	while (src[j])
		j++;
	return (i + j);
}

//as much of src is copied into dest as there is space for.