shell_variables_utils.c

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   shell_variables_utils.c                            :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: dmdemirk <dmdemirk@student.42london.c      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/09/06 11:52:02 by dmdemirk          #+#    #+#             */
/*   Updated: 2024/09/09 12:51:11 by dmdemirk         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */
 
#include "shell.h"
#include "env.h"
#include "libft.h"
#include <stddef.h>
#include <stdlib.h>
 
#include <stdio.h>
 
void    set_shell_var(t_env **shell_var, const char *key, const char *value);
void    add_shell_var_node(t_env **shell_var, const char *line);
char    *get_shell_variable(t_env *shell_var, const char *key);
void    free_shell_var_list(t_env *shell_var);
 
void    add_shell_var_node(t_env **shell_var, const char *line)
{
    char    *key;
    char    *value;
    t_env   *new_node;
    t_env   *curr_node;
 
    if (!shell_var || !line)
        return ;
    key = ft_strcdup(line, '=');
    value = ft_strchr(line, '=') + 1;
    new_node = (t_env *)malloc(sizeof(t_env));
    new_node->key = ft_strdup(key);
    free(key);
    new_node->value = ft_strdup(value);
    new_node->next = NULL;
    if (*shell_var == NULL)
        *shell_var = new_node;
    else
    {
        curr_node = *shell_var;
        while (curr_node->next != NULL)
            curr_node = curr_node->next;
        curr_node->next = new_node;
    }
}
 
void    set_shell_var(t_env **shell_var, const char *key, const char *value)
{
    t_env   *current;
    t_env   *new_env;
 
    current = *shell_var;
    while (current)
    {
        if (ft_strcmp(current->key, key) == 0)
        {
            free(current->value);
            current->value = ft_strdup(value);
            return ;
        }
        current = current->next;
    }
    new_env = malloc(sizeof(t_env));
    new_env->key = ft_strdup(key);
    new_env->value = ft_strdup(value);
    new_env->next = *shell_var;
    *shell_var = new_env;
}
 
char    *get_shell_variable(t_env *shell_var, const char *key)
{
    t_env   *curr_node;
 
    curr_node = shell_var;
    while (curr_node)
    {
        if (ft_strcmp(curr_node->key, key) == 0)
            return (curr_node->value);
        curr_node = curr_node->next;
    }
    return (NULL);
}
 
void    free_shell_var_list(t_env *shell_var)
{
    t_env   *curr_node;
    t_env   *next_node;
 
    curr_node = shell_var;
    while (curr_node)
    {
        next_node = curr_node->next;
        free(curr_node->key);
        free(curr_node->value);
        free(curr_node);
        curr_node = next_node;
    }
}