ast

test/ast/top_token.c

@@ -0,0 +1,76 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   top_token.c                                        :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: nalebrun <nalebrun@student.s19.be>        +#+  +:+       +#+         */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2025/01/31 17:14:26 by nalebrun          #+#    #+#             */
+/*   Updated: 2025/01/31 17:14:26 by nalebrun         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "ast.h"
+
+static int	last_tok_subsh(t_node *lst)
+{
+	while (lst)
+	{
+		if (lst->next == NULL && !ft_strncmp(lst->val, ")", 1))
+			return (1);
+		lst = lst->next;
+	}
+	return (0);
+}
+
+static void	skip_parentheses(t_node **lst)
+{
+	if (!ft_strncmp((*lst)->val, "(", 1))
+	{
+		while ((*lst)->next && ft_strncmp((*lst)->next->val, ")", 1))
+		{
+			if (!ft_strncmp((*lst)->val, "(", 1))
+				skip_parentheses(&(*lst)->next);
+			*lst = (*lst)->next;
+		}
+	}
+}
+
+static t_node	*find_token(char *tok, t_node *lst)
+{
+	while (lst)
+	{
+		skip_parentheses(&lst);
+		if (!ft_strncmp(lst->val, tok, ft_strlen(tok)))
+			return (lst);
+		lst = lst->next;
+	}
+	return (NULL);
+}
+
+t_node *get_top_token(t_node *lst, t_state *state)
+{
+	*state = _SUBSH;
+	if (!ft_strncmp(lst->val, "(", 1) && last_tok_subsh(lst))
+		return (lst);
+	else if (find_token("&&", lst))
+	{
+		*state = _AND;
+		return (find_token("&&", lst));
+	}
+	else if (find_token("||", lst))
+	{
+		*state = _OR;
+		return (find_token("||", lst));
+	}
+	else if (find_token("|", lst))
+	{
+		*state = _PLINE;
+		return (find_token("|", lst));
+	}
+	else
+	{
+		*state = UNDEF;
+		return (NULL);
+	}
+}