1 files changed, 98 insertions, 0 deletions
diff --git a/src/preprocess/preprocess.c b/src/preprocess/preprocess.c
new file mode 100644
index 0000000..03ae203
--- /dev/null
+++ b/src/preprocess/preprocess.c
@@ -0,0 +1,98 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   preprocess.c                                       :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: charles <charles@student.42.fr>            +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2020/04/03 08:58:49 by charles           #+#    #+#             */
+/*   Updated: 2020/10/09 15:31:33 by cacharle         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "eval.h"
+#include "lexer.h"
+#include "minishell.h"
+
+t_tok_lst			*st_stick_tokens(t_tok_lst *tokens)
+{
+	t_tok_lst	*curr;
+	t_tok_lst	*tmp;
+
+	curr = tokens;
+	while (curr != NULL)
+	{
+		if (curr->tag & TAG_STICK && curr->next != NULL)
+		{
+			curr->content = ft_strjoinf_fst(curr->content, curr->next->content);
+			tmp = curr->next->next;
+			curr->tag = curr->next->tag;
+			ft_lstdelone((t_ftlst *)curr->next, free);
+			curr->next = tmp;
+			continue;
+		}
+		curr = curr->next;
+	}
+	return (tokens);
+}
+
+char				**st_tokens_to_argv(t_tok_lst **tokens)
+{
+	char		**ret;
+	size_t		i;
+	t_tok_lst	*curr;
+
+	curr = *tokens;
+	ret = ft_calloc(ft_lstsize((t_ftlst *)curr) + 1, sizeof(char *));
+	if (ret == NULL)
+		return (NULL);
+	i = 0;
+	while (curr != NULL)
+	{
+		ret[i++] = curr->content;
+		curr = curr->next;
+	}
+	tok_lst_destroy(tokens, NULL);
+	return (ret);
+}
+
+bool				escape(char *str, enum e_tok tag)
+{
+	if (str[0] == '\\' &&
+		(tag & TAG_STR || ((tag & TAG_STR_DOUBLE)
+							&& ft_strchr("\\\"$", str[1]))))
+	{
+		ft_memmove(str, str + 1, ft_strlen(str + 1) + 1);
+		return (true);
+	}
+	return (false);
+}
+
+char				**preprocess(t_tok_lst **tokens, t_env env)
+{
+	t_tok_lst	*curr;
+	enum e_tok	prev_tag;
+	char		*str;
+	size_t		i;
+
+	prev_tag = 0;
+	curr = *tokens;
+	while (curr != NULL)
+	{
+		if (curr->tag & (TAG_STR | TAG_STR_DOUBLE))
+		{
+			i = -1;
+			while ((str = curr->content) != NULL && str[++i] != '\0')
+			{
+				if (escape(str + i, curr->tag))
+					continue;
+				if (str[i] == '$')
+					i = interpolate(str, i, &curr, prev_tag, env) - 1;
+			}
+		}
+		prev_tag = curr->tag;
+		curr = curr->next;
+	}
+	st_stick_tokens(*tokens);
+	return (st_tokens_to_argv(tokens));
+}