WIP: path update from PATH formated string

1 files changed, 104 insertions, 0 deletions

diff --git a/src/path.c b/src/path.c
new file mode 100644
index 0000000..0a9dbd1
--- /dev/null
+++ b/src/path.c
@@ -0,0 +1,104 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   path.c                                             :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: cacharle <marvin@42.fr>                    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2020/02/27 15:51:01 by cacharle          #+#    #+#             */
+/*   Updated: 2020/02/27 18:07:16 by cacharle         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "minishell.h"
+
+static void				st_path_command_entry_del(t_ftht_content *content)
+{
+	if (content == NULL)
+		return ;
+	free(content->key);
+	free(content->value);
+}
+
+static int				st_in_dirs(char **dirs, char *dir)
+{
+	while (*dirs != NULL)
+		if (ft_strcmp(*dirs++, dir) == 0)
+			return (TRUE); // maybe change ft_lstremove_if func to cmp instead of bool
+	return (FALSE);
+}
+
+static t_path			*st_path_commands_update(t_path *path, char *dirname)
+{
+	DIR				*dir;
+	struct dirent	*entry;
+	char			*tmp;
+
+	if ((dir = opendir(dirname)) == NULL)
+		return (NULL);
+	while ((entry = readdir(dir)) != NULL)
+	{
+		if ((tmp = ft_strjoin(dirname, entry->d_name)) == NULL)
+			return (NULL);
+		if (ft_htset(path->commands, entry->d_name, st_path_command_entry_del) == NULL)
+			return (NULL);
+	}
+	if (closedir(dir) == -1)
+		return (NULL);
+	return (path);
+}
+
+/*
+** Update path list with `dirname`
+*/
+
+static t_path			*st_path_dir_update(t_path *path, char *dirname)
+{
+	t_ftlst	*front;
+
+	if (ft_lstlfind(path->dirs, (int (*)(void*, void*))ft_strcmp, dirname) == NULL)
+	{
+		if ((dirname = ft_strdup(dirname)) == NULL)
+			return (NULL);
+		if ((front = ft_lstnew(dirname)) == NULL)
+		{
+			free(dirname);
+			return (NULL);
+		}
+		ft_lstadd_front(&path->dirs, front);
+	}
+	return (st_path_commands_update(path, dirname));
+}
+
+/*
+** Update (or create if `path` is NULL) `path` according to `path_str`
+** (each directory is separated by a ':').
+*/
+
+t_path					*ms_path_update(t_path *path, const char *path_str)
+{
+	int		i;
+	char	**dirs;
+
+	if (path == NULL)
+		if ((path = malloc(sizeof(t_path))) == NULL)
+			return (NULL);
+	if ((dirs = ft_split(path_str, ':')) == NULL)
+		return (NULL);
+	ft_lstremove_if(&path->dirs, (t_ftbool (*)(void*, void*))st_in_dirs, free, (void*)dirs);  // change t_ftbool to std bool
+	i = -1;
+	while (dirs[i] != NULL)
+		if (st_path_dir_update(path, dirs[i]) == NULL)
+			return (ft_split_destroy(dirs));
+	ft_split_destroy(dirs);
+	return (path);
+}
+
+void					ms_path_destroy(t_path *path)
+{
+	if (path == NULL)
+		return ;
+	ft_lstclear(&path->dirs, free);
+	ft_htdestroy(path->commands, st_path_command_entry_del);
+	free(path);
+}