42_minishell/env.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   env.c                                              :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: erey-bet <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/02/02 14:39:56 by erey-bet          #+#    #+#             */
/*   Updated: 2023/02/14 15:21:28 by cchauvet         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libftx/libftx.h"
#include "minishell.h"
#include "utils/utils.h"

void	env_del(void *content)
{
	(void) content;
}

int	strcmp_alphabet(char *s1, char *s2)
{
	int	i;

	if (!s1 || !s2)
		return (-2);
	i = 0;
	while (s1[i] && s2[i])
	{
		if (s1[i] < s2[i])
			return (0);
		else if (s1[i] > s2[i])
			return (1);
		i++;
	}
	return (-1);
}

void	ft_double_swap(char **a, char **b)
{
	void	*c;

	c = *a;
	*a = *b;
	*b = c;
}

void	exchange(char **a, char **b, char **c)
{
	void	*d;

	d = *a;
	*a = *b;
	*b = *c;
	*c = d;
}

void	add_sort(t_list **head, char *str)
{
	t_list	*current;
	char	*last;

	current = *head;
	while (current->next != NULL && strcmp_alphabet(str, current->content) != 0)
		current = current->next;
	if (strcmp_alphabet(str, current->content) == 1)
		last = str;
	else
		exchange(&last, (char **)(&current->content), &str);
	while (current != NULL)
	{
		if (current->next == NULL)
			current->next = ft_calloc(1, sizeof(t_list));
		if (current->next == NULL)
			return ;
		current = current->next;
		if (current->content == NULL)
		{
			current->content = last;
			return ;
		}
		else
			ft_double_swap((char **)(&current->content), &last);
	}
}

char	*get_value_by_index(int index, t_list **head)
{
	t_list	*current;
	int		i;

	current = *head;
	i = -1;
	while (current != NULL && ++i != index)
		current = current->next;
	if (i == index)
		return (ft_strchr(current->content, '=') + 1);
	return (NULL);
}

char	*get_value_by_key(char *key, t_list **head)
{
	t_list	*current;

	current = *head;
	while (current != NULL)
	{
		if (ft_strncmp(current->content, key, ft_strlen(key)))
			return (ft_strchr(current->content, '=') + 1);
		current = current->next;
	}
	return (NULL);
}

int		set_value_by_key(t_list **env, char *key, char *value)
{
	t_list	*current;
	char	*temp;

	current = *env;
	while (current != NULL)
	{
		if (!ft_strncmp(key, current->content, ft_strlen(current->content)))
		{
			temp = current->content;
			current->content = ft_strreplace(temp, value,
					ft_strnchr(temp, '=') + 1,
					ft_strlen(temp) - (ft_strnchr(temp, '=') - 1));
			free(temp);
			if (current->content == NULL)
			{
				ft_eprintf("minishell: malloc failed");
				return (1);
			}
		}
		current = current->next;
	}
	return (0);
}

t_list	**init_env(char **env)
{
	t_list	**head;
	int		i;

	head = ft_calloc(1, sizeof(t_list *));
	*head = ft_calloc(1, sizeof(t_list));
	if (*head == NULL)
		return (NULL);
	i = -1;
	while (env[++i])
		add_sort(head, env[i]);
	return (head);
}