Merge branch 'master' into parse_cmd

1 files changed, 49 insertions, 0 deletions

diff --git a/src/eval/op.c b/src/eval/op.c
new file mode 100644
index 0000000..e47698b
--- /dev/null
+++ b/src/eval/op.c
@@ -0,0 +1,49 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   op.c                                               :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: charles <charles.cabergs@gmail.com>        +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2020/06/17 15:27:22 by charles           #+#    #+#             */
+/*   Updated: 2020/06/17 17:03:48 by charles          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "eval.h"
+
+// TODO: add parent tag on first operation of parent to fork
+int			eval_op(int fds[2], t_env env, t_path path, t_op *op)
+{
+	int	status;
+	int	left_fds[2];
+	int	right_fds[2];
+	int p[2];
+
+	left_fds[FDS_READ] = fds[FDS_READ];
+	left_fds[FDS_WRITE] = MS_NO_FD;
+	right_fds[FDS_READ] = MS_NO_FD;
+	right_fds[FDS_WRITE] = fds[FDS_WRITE];
+	if (op->sep == TAG_PIPE)
+	{
+		pipe(p);
+		left_fds[FDS_WRITE] = p[FDS_WRITE];
+		right_fds[FDS_READ] = p[FDS_READ];
+	}
+	if ((status = eval(left_fds, env, path, op->left)) == -1)
+		return (-1);
+	if ((op->sep == TAG_AND && status != 0) ||
+		(op->sep == TAG_PIPE && status != 0) ||
+		(op->sep == TAG_OR && status == 0))
+		return (status);
+	return (eval(right_fds, env, path, op->right));
+}
+
+int			eval(int fds[2], t_env env, t_path path, t_ast *ast)
+{
+	if (ast->tag == AST_OP)
+		return (eval_op(fds, env, path, &ast->op));
+	if (ast->tag == AST_CMD)
+		return (eval_cmd(fds, env, path, ast));
+	return (-1);
+}