Refactoring lexer to understand it

1 files changed, 107 insertions, 0 deletions

diff --git a/src/lexer/utils.c b/src/lexer/utils.c
new file mode 100644
index 0000000..7df4955
--- /dev/null
+++ b/src/lexer/utils.c
@@ -0,0 +1,107 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   utils.c                                            :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: nahaddac <nahaddac@student.42.fr>          +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2020/07/16 08:18:15 by nahaddac          #+#    #+#             */
+/*   Updated: 2020/09/13 17:23:29 by charles          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "lexer.h"
+
+// return token tag corresponding to string id
+enum e_tok                tok_assign_tag(char *content)
+{
+    if (content[0] == ';')
+        return (TAG_END);
+    if (ft_strncmp(content, "&&", 2) == 0)
+        return (TAG_AND);
+    if (ft_strncmp(content, "||", 2) == 0)
+        return (TAG_OR);
+    if(content[0]  == '|')
+        return (TAG_PIPE);
+    if (content[0] == '>')
+    	return (TAG_REDIR_OUT);
+    if (content[0] == '<')
+        return (TAG_REDIR_IN);
+    if (ft_strncmp(content, ">>", 2) == 0)
+    	return (TAG_REDIR_APPEND);
+    if (content[0] == '(')
+        return (TAG_PARENT_OPEN);
+    if (content[0] == ')')
+        return (TAG_PARENT_CLOSE);
+    return (0);
+}
+
+enum e_tok tok_assign_stick(t_tok_lst *tok)
+{
+	int i;
+
+	i = ft_strlen(tok->content);
+	if (i > 0)
+		if (ft_isblank(tok->content[i - 1]))
+			return (tok->tag);
+	return (tok->tag | TAG_STICK);
+}
+
+enum e_tok tok_assign_str(t_tok_lst *tok)
+{
+	int i;
+
+	// could use strchr to search ' or "
+	i = 0;
+	while (tok->content[i] != '\0')
+	{
+		if (tok->content[i] == '\'')
+		{
+			tok->tag = TAG_STR_SINGLE;
+			return (tok_assign_stick(tok));
+		}
+		if (tok->content[i] == '"')
+		{
+			tok->tag = TAG_STR_DOUBLE;
+			return (tok_assign_stick(tok));
+		}
+		else
+		{
+			tok->tag = TAG_STR;
+			return (tok_assign_stick(tok));
+		}
+		i++;
+	}
+	return (0);
+}
+
+
+// check is char is separator
+// & alone could be considered a separator
+int                 	lexer_sep(char c)
+{
+	return (ft_strchr(";&|><()", c) != NULL);
+}
+
+// number of starting space character
+int             		lexer_space(char *input)
+{
+	return (ft_strspn(input, " \t"));
+}
+
+int             		quote_len(char *input, int i)
+{
+	char	quote_type;
+
+	quote_type = input[i];
+    i++;
+    while (input[i] != quote_type && input[i] != '\0')
+    {
+        if (input[i] == '\\')
+			i++;
+        i++;
+    }
+	while (ft_isblank(input[i + 1]))
+		i++;
+    return (i + 1);
+}