1 files changed, 99 insertions, 0 deletions
diff --git a/src/collect_redirs.c b/src/collect_redirs.c
new file mode 100644
index 0000000..9ac1605
--- /dev/null
+++ b/src/collect_redirs.c
@@ -0,0 +1,99 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   collect_redirs.c                                   :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: dkaiser <dkaiser@student.42heilbronn.de    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/08/02 13:49:31 by dkaiser           #+#    #+#             */
+/*   Updated: 2024/09/17 19:48:48 by dkaiser          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "minishell.h"
+
+static t_token	*collect_redir(t_token **tokens, t_redirection *result,
+					t_token *cur);
+static void		collect_and_check_redir(t_token **tokens, t_redirection *result,
+					t_token **cur);
+static void		set_redir(t_redirection *redir, int type, char *specifier);
+static int		is_output_redir(int i);
+
+t_redirection	*collect_redirs(t_token **tokens)
+{
+	t_redirection	*result;
+	t_token			*cur;
+
+	cur = *tokens;
+	result = malloc(sizeof(t_redirection) * 2);
+	if (result == NULL)
+		return (free_tokens(*tokens), NULL);
+	set_redir(&result[0], 0, NULL);
+	set_redir(&result[1], 0, NULL);
+	while (cur != NULL && cur->next != NULL)
+	{
+		if (cur->type == REDIR_TOKEN && cur->next->type == STRING_TOKEN)
+			collect_and_check_redir(tokens, result, &cur);
+		else if (cur->type == REDIR_TOKEN)
+			return (free(result), NULL);
+		else
+			cur = cur->next;
+	}
+	if (cur && cur->type == REDIR_TOKEN)
+		return (free(result), NULL);
+	return (result);
+}
+
+static void	collect_and_check_redir(t_token **tokens, t_redirection *result,
+		t_token **cur)
+{
+	int	is_redir_only;
+
+	is_redir_only = 0;
+	if ((*cur)->previous == NULL && (*cur)->next->next == NULL)
+		is_redir_only = 1;
+	*cur = collect_redir(tokens, result, *cur);
+	if (is_redir_only)
+		*tokens = NULL;
+}
+
+static t_token	*collect_redir(t_token **tokens, t_redirection *result,
+		t_token *cur)
+{
+	set_redir(&result[is_output_redir(cur->content.redir_type)],
+		cur->content.redir_type, cur->next->content.string);
+	cur = cur->next;
+	free_token_and_connect(cur->previous);
+	if (cur->next != NULL)
+	{
+		if (cur->previous == NULL)
+			*tokens = cur->next;
+		cur = cur->next;
+		free_token_and_connect(cur->previous);
+	}
+	else
+	{
+		free_token(cur);
+		return (NULL);
+	}
+	return (cur);
+}
+
+static void	set_redir(t_redirection *redir, int type, char *specifier)
+{
+	redir->type = type;
+	redir->specifier = specifier;
+}
+
+static int	is_output_redir(int i)
+{
+	if (i & (INPUT_FILE | INPUT_LIMITER))
+		return (0);
+	else if (i & (OUTPUT_APPEND | OUTPUT_OVERRIDE))
+		return (1);
+	else
+	{
+		panic(UNREACHABLE);
+		return (-1);
+	}
+}