42_minishell/env.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   env.c                                              :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: erey-bet <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/02/02 14:39:56 by erey-bet          #+#    #+#             */
/*   Updated: 2023/02/16 14:30:12 by erey-bet         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "minishell.h"

int	get_index(char *s, char c)
{
	int	i;

	i = -1;
	while (s[++i])
		if (s[i] == c)
			return (i);
	return (-1);
}

void	print_export(t_list **head, int fd)
{
	t_list	*current;
	char	*ctn;
	int		v;

	current = *head;
	while (current->next != NULL)
	{
		write(fd, "declare -x ", 11);
		ft_putstr_fd(((t_env*)(current->content))->key, fd);
		ft_putstr_fd("=", fd);
		write(fd, "\"", 1);
		ft_putstr_fd(((t_env*)(current->content))->value, fd);
		write(fd, "\"\n", 2);
		current = current->next;
	}
}

void	print_env(t_list **head, int fd)
{
	t_list	*current;

	current = *head;
	while (current->next != NULL)
	{
		ft_putstr_fd(((t_env*)(current->content))->key, fd);
		ft_putstr_fd("=", fd);
		ft_putstr_fd(((t_env*)(current->content))->value, fd);
		write(fd, "\n", 1);
		current = current->next;
	}
}

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

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

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

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

char	*get_value(char *str)
{
	char	*s;
	int		i;
	int		start;

	s = ft_calloc(ft_strlen(str), sizeof(char));
	start = get_index(str, '=');
	i = start;
	while (str[++i])
		s[i - start - 1] = str[i];
	return (s);
}

char	*get_key(char *str)
{
	char	*s;
	int		i;

	s = ft_calloc(ft_strlen(str), sizeof(char));
	i = -1;
	while (str[++i] != '=')
		s[i] = str[i];
	return (s);
}

void	swap_env_3(void **a, void **b, void **c)
{
	void	*d;

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

void	swap_env(void **a, void **b)
{
	void	*c;

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

void	add_sort(t_list **head, t_env *var)
{
	t_list	*current;
	t_env	*last;

	current = *head;
	while (current->next != NULL && strcmp_alphabet(var->key, ((t_env*)(current->content))->key) != 0)
		current = current->next;
	if (current->content == NULL)
		current->content = var;
	else
	{
		last = NULL;
		swap_env_3((void **)&last, &current->content, (void **)&var);
		while (current->next != NULL)
		{
			current = current->next;
			swap_env(&current->content, (void **)&last);
		}
	}
	if (current->next == NULL)
		current->next = ft_calloc(1, sizeof(t_list));
}

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

	current = *head;
	while (current->next != NULL)
	{
		if (ft_strcmp(((t_env *)current->content)->key, key) == 0)
			return (((t_env *)current->content)->value);
		current = current->next;
	}
	return (NULL);
}

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

	current = *head;
	while (current->next != NULL)
	{
		if (ft_strcmp(((t_env *)current->content)->key, key) == 0)
		{
			free(((t_env *)current->content)->value);
			((t_env *)current->content)->value = value;
			return (0);
		}
		current = current->next;
	}
	return (1);
}

int	create_value_by_key(char *key, char *value, t_list **head)
{
	t_env *content;
	if (set_value_by_key(key, value, head) == 0)
		return (0);
	content = ft_calloc(1, sizeof(t_env));
	if (content == NULL)
		return (1);
	content->key = key;
	content->value = value;
	add_sort(head, content);
	return (0);
}

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

	head = ft_calloc(1, sizeof(t_list *));
	if (head == NULL)
		return (NULL);
	*head = ft_calloc(1, sizeof(t_list));
	if (*head == NULL)
		return (NULL);
	i = -1;
	while (env[++i])
	{
		var = ft_calloc(1, sizeof(t_env));
		if (var == NULL)
			return (NULL);
		var->key = get_key(env[i]);
		var->value = get_value(env[i]);
		add_sort(head, var);
	}
	return (head);
}