From 46a6daccfeef4bded671cdc387f4d0c263b1c384 Mon Sep 17 00:00:00 2001
From: Bananymous <bananymousosq@gmail.com>
Date: Mon, 19 Jun 2023 01:07:00 +0300
Subject: [PATCH] Userspace: Shell argument parsing now appriciates quotes

---
 userspace/Shell/main.cpp | 51 +++++++++++++++++++++++++++++++++++++---
 1 file changed, 48 insertions(+), 3 deletions(-)

diff --git a/userspace/Shell/main.cpp b/userspace/Shell/main.cpp
index b895a407..5987888c 100644
--- a/userspace/Shell/main.cpp
+++ b/userspace/Shell/main.cpp
@@ -12,10 +12,55 @@ struct termios old_termios, new_termios;
 
 BAN::Vector<BAN::String> parse_command(BAN::StringView command)
 {
-	auto args = MUST(command.split(' '));
+	enum class State
+	{
+		Normal,
+		SingleQuote,
+		DoubleQuote,
+	};
+
 	BAN::Vector<BAN::String> result;
-	for (auto arg : args)
-		MUST(result.push_back(arg));
+
+	State state = State::Normal;
+	BAN::String current;
+	for (char c : command)
+	{
+		switch (state)
+		{
+			case State::Normal:
+				if (c == '\'')
+					state = State::SingleQuote;
+				else if (c == '"')
+					state = State::DoubleQuote;
+				else if (!isspace(c))
+					MUST(current.push_back(c));
+				else
+				{
+					if (!current.empty())
+					{
+						MUST(result.push_back(current));
+						current.clear();
+					}
+				}
+				break;
+			case State::SingleQuote:
+				if (c == '\'')
+					state = State::Normal;
+				else
+					MUST(current.push_back(c));
+				break;
+			case State::DoubleQuote:
+				if (c == '"')
+					state = State::Normal;
+				else
+					MUST(current.push_back(c));
+				break;
+		}
+	}
+
+	// FIXME: handle state != State::Normal
+	MUST(result.push_back(BAN::move(current)));
+
 	return result;
 }