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srcs/env/var2.c

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+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   var2.c                                             :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: lderidde <lderidde@student.s19.be>        +#+  +:+       +#+         */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2025/02/11 15:36:27 by lderidde          #+#    #+#             */
+/*   Updated: 2025/02/11 15:36:27 by lderidde         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "../../includes/minishell.h"
+
+int	get_var_index(char *key, t_msh *msh)
+{
+	int		i;
+	char	*new_key;
+
+	new_key = ft_strjoin(key, "=");
+	if (!new_key)
+		return (-1);
+	i = 0;
+	while (msh->env[i])
+	{
+		if (ft_strncmp(msh->env[i], new_key, ft_strlen(new_key)) == 0)
+		{
+			free_null_ptr(new_key);
+			return (i);
+		}
+		else if (ft_strncmp(msh->env[i], key, ft_strlen(key)) == 0
+			&& (ft_strchr(msh->env[i], '=') == NULL
+				&& (ft_strlen(msh->env[i]) == ft_strlen(key))))
+		{
+			free_null_ptr(new_key);
+			return (i);
+		}
+		i++;
+	}
+	free_null_ptr(new_key);
+	return (-1);
+}
+
+int	remove_env_var(char *key, t_msh *msh)
+{
+	int	i;
+	int	j;
+
+	i = get_var_index(key, msh);
+	if (i == -1)
+		return (0);
+	j = i;
+	free_null_ptr(msh->env[i]);
+	while (msh->env[i + 1])
+	{
+		msh->env[i] = ft_strdup(msh->env[i + 1]);
+		free_null_ptr(msh->env[i + 1]);
+		j++;
+		i++;
+	}
+	msh->env = copy_env_var(msh->env, j);
+	if (msh->env)
+		return (1);
+	return (0);
+}
+
+void	set_var_env(char *key, char *value, t_msh *msh)
+{
+	int		i;
+	char	*tmp;
+
+	tmp = NULL;
+	i = get_var_index(key, msh);
+	if (value)
+		tmp = ft_strjoin("=", value);
+	if (value && !tmp)
+		return ;
+	if (i != -1 && msh->env[i])
+	{
+		free_null_ptr(msh->env[i]);
+		msh->env[i] = ft_strjoin(key, tmp);
+	}
+	else
+	{
+		i = count_var(msh->env);
+		msh->env = copy_env_var(msh->env, i + 1);
+		if (!msh->env)
+			return ;
+		msh->env[i] = ft_strjoin(key, tmp);
+	}
+	if (tmp && tmp[0])
+		free_null_ptr(tmp);
+	return ;
+}
+
+char	**init_env(char **envp)
+{
+	char	**env;
+	int		i;
+
+	i = 0;
+	env = malloc(sizeof(char *) * (count_var(envp) + 1));
+	if (!env)
+		return (NULL);
+	env[count_var(envp)] = NULL;
+	while (envp[i])
+	{
+		env[i] = ft_strdup(envp[i]);
+		i++;
+	}
+	return (env);
+}