env_operations.c

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   env_operations.c                                   :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: baelgadi <baelgadi@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2025/12/03 17:04:44 by zotaj-di          #+#    #+#             */
/*   Updated: 2026/03/04 04:42:06 by baelgadi         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */
 
#include "env.h"
#include "libft.h"
 
char    *get_env_value(t_env *env_list, char *key)
{
    t_env   *current;
 
    if (!key)
        return (NULL);
    current = env_list;
    while (current)
    {
        if (ft_strncmp(current->key, key, ft_strlen(key) + 1) == 0)
            return (current->value);
        current = current->next;
    }
    return (NULL);
}
 
static int  update_existing_var(t_env *env_list, char *key, char *value)
{
    t_env   *current;
    char    *new_value;
 
    current = env_list;
    while (current)
    {
        if (ft_strncmp(current->key, key, ft_strlen(key) + 1) == 0)
        {
            new_value = ft_strdup(value);
            if (!new_value)
                return (0);
            free(current->value);
            current->value = new_value;
            return (1);
        }
        current = current->next;
    }
    return (0);
}
 
static int  create_new_var(t_env **env_list, char *key, char *value)
{
    t_env   *new_node;
    char    *env_string;
    char    *tmp;
 
    tmp = ft_strjoin(key, "=");
    if (!tmp)
        return (0);
    env_string = ft_strjoin(tmp, value);
    free(tmp);
    if (!env_string)
        return (0);
    new_node = create_env_node(env_string);
    free(env_string);
    if (!new_node)
        return (0);
    add_env_node(env_list, new_node);
    return (1);
}
 
int set_env_value(t_env **env_list, char *key, char *value)
{
    int result;
 
    result = update_existing_var(*env_list, key, value);
    if (result)
        return (1);
    return (create_new_var(env_list, key, value));
}