builtins

srcs/env/var.c

@@ -0,0 +1,159 @@
+#include "../../includes/minishell.h"
+
+void	free_null_ptr(void *ptr)
+{
+	if (ptr != NULL)
+	{
+		free(ptr);
+		ptr = NULL;
+	}
+}
+
+char	**copy_env_var(char **envp, int count)
+{
+	char	**new_env;
+	int		i;
+
+	i = 0;
+	new_env = malloc(sizeof(char *) * (count + 1));
+	if (!new_env)
+		return (NULL);
+	new_env[count] = NULL;
+	while (envp[i] && i < count)
+	{
+		new_env[i] = ft_strdup(envp[i]);
+		free_null_ptr(envp[i]);
+		i++;
+	}
+	free_null_ptr(envp);
+	return (new_env);
+}
+
+int	count_var(char **envp)
+{
+	int	i;
+
+	i = 0;
+	if (!envp)
+		return (-1);
+	while (envp[i])
+		i++;
+	return (i);
+}
+
+char	*get_var_value(char	*key, char **envp)
+{
+	char	*tmp;
+	int		i;
+
+	tmp = ft_strjoin(key, "=");
+	if (!tmp)
+		return (NULL);
+	i = 0;
+	while (envp[i])
+	{
+		if (ft_strncmp(envp[i], tmp, ft_strlen(tmp)) == 0)
+		{
+			free_null_ptr(tmp);
+			return (ft_strchr(envp[i], '=') + 1);
+		}
+		i++;
+	}
+	free_null_ptr(tmp);
+	return (NULL);
+}
+
+bool	is_valid_key(char *key, char **envp)
+{
+	char	*tmp;
+	int		i;
+
+	tmp = ft_strjoin(key, "=");
+	if (!tmp)
+		return (false);
+	while (envp[i])
+	{
+		if (ft_strncmp(envp[i], tmp, ft_strlen(tmp)) == 0)
+		{
+			free_null_ptr(tmp);
+			return (true);
+		}
+		i++;
+	}
+	free_null_ptr(tmp);
+	return (false);
+}
+
+int	get_var_index(char *key, char **envp)
+{
+	int		i;
+	char	*new_key;
+
+	new_key = ft_strjoin(key, "=");
+	if (!new_key)
+		return (-1);
+	i = 0;
+	while (envp[i])
+	{
+		if (ft_strncmp(envp[i], new_key, ft_strlen(new_key)) == 0)
+		{
+			free_null_ptr(new_key);
+			return (i);
+		}
+		i++;
+	}
+	free_null_ptr(new_key);
+	return (-1);
+}
+
+
+int	remove_env_var(char *key, char **envp)
+{
+	int	i;
+	int	j;
+
+	i = get_var_index(key, envp);
+	if (i == -1)
+		return (0);
+	j = i;
+	free_null_ptr(envp[i]);
+	while (envp[i + 1])
+	{
+		envp[i] = ft_strdup(envp[i + 1]);
+		free_null_ptr(envp[i + 1]);
+		j++;
+		i++;
+	}
+	envp = copy_env_var(envp, j);
+	if (!envp)
+		return (1);
+	return (0);
+}
+
+void	set_var_env(char *key, char *value, t_data *data)
+{
+	int		i;
+	char	*tmp;
+
+	i = get_var_index(key, data->env);
+	if (!value)
+		value = "";
+	tmp = ft_strjoin("=", value);
+	if (!tmp)
+		return ;
+	if (i != -1 && data->env[i])
+	{
+		free_null_ptr(data->env[i]);
+		data->env[i] = ft_strjoin(key, tmp);
+	}
+	else
+	{
+		i = count_var(data->env);
+		data->env = copy_env_var(data->env, i + 1);
+		if (!data->env)
+			return ;
+		data->env[i] = ft_strjoin(key, tmp);
+	}
+	free_null_ptr(tmp);
+	return ;
+}