syntax analysis with simplified shell grammar

+ TODO : bug to fix in lexer.c
2021-10-24 19:58:19 +02:00
parent 906074d2cb
commit 815cedb8ca
11 changed files with 400 additions and 18 deletions
--- a/srcs/parsing/parsing.c
+++ b/srcs/parsing/parsing.c
@@ -0,0 +1,101 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   parsing.c                                          :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: lperrey <lperrey@student.42.fr>            +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2021/10/24 10:52:40 by lperrey           #+#    #+#             */
+/*   Updated: 2021/10/24 19:19:08 by lperrey          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "minishell.h"
+
+// A quoi bon un arbre binaire ? Je ne vois plus l'utilité.
+
+/* typedef struct s_binary_tree
+{
+	char					*content;
+	struct s_binary_tree	*sub;
+	struct s_binary_tree	*sibling;
+	enum e_token_id			id;
+}				t_binary_tree; */
+
+t_cmd	**parsing(t_token *token_list)
+{
+	t_cmd	**cmd_arr;
+	size_t	cmd_nbr;
+
+	(void)cmd_arr;
+	(void)cmd_nbr;
+/* 	t_binary_tree	*syntax_tree;
+	
+	syntax_tree = ft_calloc(1, sizeof *syntax_tree);
+	if (!syntax_tree)
+		return (0); //WIP ERROR */
+	
+	if (!valid_syntax(token_list))
+		return (NULL);
+	// Pipes count (determine cmd_nbr)
+		
+	// Struct CMD alloc/fill
+
+	// 2.9.1 - 2) Expansion
+
+	// 2.9.1 - 3) Redirection
+	
+	//return (cmd_arr);
+	return ((t_cmd **)1); //temp test
+}
+
+/* -------------------------------------------------------
+   The grammar symbols
+   ------------------------------------------------------- */
+/*
+%token  WORD
+%token  LESS // '<'
+%token  GREAT // '>'
+%token  DLESS // '<<'
+%token  DGREAT // '>>'
+%token  PIPE // '|'
+*/
+
+/* -------------------------------------------------------
+   The Simplified Grammar
+   ------------------------------------------------------- */
+/*
+%start program
+%%
+pipeline         :                   command
+                 | pipe_sequence '|' command
+                 ;
+command          : cmd_prefix cmd_name cmd_suffix
+                 | cmd_prefix cmd_name
+                 | cmd_name cmd_suffix
+                 | cmd_name
+                 ;
+cmd_name         : WORD                   // Apply rule 7a
+                 ;
+cmd_prefix       :            io_redirect
+                 | cmd_prefix io_redirect
+                 ;
+cmd_suffix       :            io_redirect
+                 | cmd_suffix io_redirect
+                 |            WORD
+                 | cmd_suffix WORD
+                 ;
+io_redirect      :           io_file
+                 |           io_here
+                 ;
+io_file          : '<'       filename
+                 | '>'       filename
+                 | DGREAT    filename
+                 ;
+filename         : WORD                      // Apply rule 2
+                 ;
+io_here          : DLESS     here_end
+                 ;
+here_end         : WORD                      // Apply rule 3
+                 ;
+*/