/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strreplace.c                                    :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: bchanot <bchanot@students.42.fr>           +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2017/01/19 23:19:39 by bchanot           #+#    #+#             */
/*   Updated: 2018/10/14 03:25:42 by bchanot          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

char	*ft_stristr(const char *s1, const char *s2)
{
	size_t	i;
	size_t	j;
	size_t	size;

	i = 0;
	size = ft_strlen(s2);
	if (size == 0)
		return ((char *)s1);
	while (s1[i])
	{
		if ((i && s1[i - 1] != '\\') || !i)
		{
			j = 0;
			while (s2[j] == s1[i + j])
			{
				if (j == size - 1)
					return ((char *)&s1[i]);
				j++;
			}
		}
		i++;
	}
	return (NULL);
}

char	*ft_strreplace(const char *src, const char *var, const char *val)
{
	char	*new;
	size_t	i;
	size_t	j;
	size_t	k;

	if (!(new = ft_strnew(ft_strlen(src) - ft_strlen(var) +
					ft_strlen(val) + 1)))
		return (NULL);
	i = -1;
	while (ft_strcmp(&src[++i], ft_stristr(src, var)))
		new[i] = src[i];
	j = -1;
	k = i;
	while (val[++j])
	{
		new[k] = val[j];
		k++;
	}
	i += ft_strlen(var);
	j = i;
	while (src[i])
		new[k++] = src[i++];
	return (new);
}