42_minishell/env/env3.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   env3.c                                             :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: erey-bet <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/02/17 17:25:09 by erey-bet          #+#    #+#             */
/*   Updated: 2023/04/07 13:21:54 by erey-bet         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "env_private.h"

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);
}

int	create_value_by_key_dup(char *key, char *value, t_list **env)
{
	char	*key_dup;
	char	*value_dup;

	if (set_value_by_key(key, value, env) == 0)
		return (0);
	key_dup = ft_strdup(key);
	if (key_dup == NULL)
		return (1);
	if (value != NULL)
	{
		value_dup = ft_strdup(value);
		if (value_dup == NULL)
		{
			free(key);
			return (1);
		}
	}
	else
		value_dup = value;
	if (create_value_by_key(key_dup, value_dup, env))
		return (1);
	return (0);
}

int	delete_by_key(char *key, t_list **head)
{
	t_list	*last;
	t_list	*current;

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

int	possible_key(char *key)
{
	int		i;

	i = -1;
	if (ft_isdigit(key[i + 1]))
		return (0);
	while (key[++i + 1])
		if (!ft_isalnum(key[i]) && key[i] != '_')
			return (0);
	if (key[i] == '+')
		return (2);
	else if (!ft_isalnum(key[i]) && key[i] != '_')
		return (0);
	return (1);
}