/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_s_lvars.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: rbousset <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2020/02/14 17:19:27 by rbousset          #+#    #+#             */
/*   Updated: 2020/02/14 17:19:29 by rbousset         ###   ########lyon.fr   */
/*                                                                            */
/* ************************************************************************** */

#include <libft.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <unistd.h>

#include "ft_s_struct.h"

void
	ft_lvars_rebind(t_lvars **lvars,
					const char name[],
					const char newval[])
{
	t_lvars	*tmp;

	tmp = *lvars;
	while (tmp && ft_strncmp(tmp->name, name, ft_strlen(name)))
	{
		tmp = tmp->next;
	}
	if (tmp == NULL)
	{
		return ;
	}
	ft_memdel((void*)&tmp->val);
	if (!(tmp->val = ft_strdup(newval)))
	{
		ft_dprintf(STDERR_FILENO, "%s\n", strerror(errno));
		exit(FT_RET_ALLOC);
	}
}

void
	ft_lvars_delone(t_lvars **lvars,
					const char name[])
{
	t_lvars	*tmp;
	t_lvars	*prev;

	tmp = *lvars;
	if (tmp != NULL && !ft_strncmp(tmp->name, name, ft_strlen(name)))
	{
		*lvars = tmp->next;
		ft_memdel((void*)&tmp->name);
		ft_memdel((void*)&tmp->val);
		ft_memdel((void*)&tmp);
		return ;
	}
	while (tmp && ft_strncmp(tmp->name, name, ft_strlen(name)))
	{
		prev = tmp;
		tmp = tmp->next;
	}
	if (tmp == NULL)
		return ;
	prev->next = tmp->next;
	ft_memdel((void*)&tmp->name);
	ft_memdel((void*)&tmp->val);
	ft_memdel((void*)&tmp);
}

void
	ft_lvars_add_front(t_lvars **alvars,
					t_lvars *new)
{
	if (!alvars || !new)
	{
		return ;
	}
	new->next = *alvars;
	*alvars = new;
}

void
	ft_lvars_clear(t_lvars **lvars)
{
	t_lvars	*tmp;
	t_lvars	*renext;

	if (!lvars)
		return ;
	tmp = *lvars;
	while (tmp)
	{
		renext = tmp->next;
		ft_memdel((void*)&tmp->name);
		ft_memdel((void*)&tmp->val);
		ft_memdel((void*)&tmp);
		tmp = renext;
	}
	*lvars = NULL;
}

t_lvars
	*ft_lvars_new(const char name[],
				const char val[])
{
	t_lvars	*link;

	if (!(link = (t_lvars*)malloc(sizeof(t_lvars))))
	{
		return (NULL);
	}
	if (!(link->name = ft_strdup(name)))
	{
		return (NULL);
	}
	if (!(link->val = ft_strdup(val)))
	{
		return (NULL);
	}
	link->next = NULL;
	return (link);
}