[hull] Add start on command interpreter

src/olympic/CMakeLists.txt

@@ -19,6 +19,9 @@ else()
 endif()
 
 add_subdirectory(applib)
+if(NOT APPLE)
+    add_subdirectory(hull)
+endif()
 add_subdirectory(keel)
 add_subdirectory(turbine)
 if(${OLYMPIC_BUILD_STUDIO})

src/olympic/hull/CMakeLists.txt

@@ -0,0 +1,12 @@
+
+add_library(Hull)
+target_sources(
+    Hull PUBLIC
+        FILE_SET CXX_MODULES FILES
+            hull.cpp
+)
+
+target_link_libraries(
+	Hull PUBLIC
+		OxStd
+)

src/olympic/hull/hull.cpp

@@ -0,0 +1,98 @@
+/*
+ * Copyright 2016 - 2025 Gary Talent (gary@drinkingtea.net). All rights reserved.
+ */
+
+module;
+
+#include <ox/std/string.hpp>
+
+export module hull;
+
+namespace hull {
+
+export
+template<typename Str = ox::String, size_t SmallVecSz = 0>
+constexpr ox::Result<ox::Vector<Str, SmallVecSz>> parseCmd(ox::StringViewCR cmd) noexcept
+	requires(ox::is_same_v<Str, ox::String> || ox::is_same_v<Str, ox::StringView>) {
+	auto const tokens = split(cmd, ' ');
+	ox::Vector<Str, SmallVecSz> args;
+	char waitingFor{};
+	auto const handleString = [&waitingFor, &args](
+		ox::StringViewCR token,
+		char const delimiter) {
+		if (endsWith(token, delimiter)) {
+			args.emplace_back(substr(token, 1, token.size() - 1));
+		} else {
+			waitingFor = delimiter;
+			args.emplace_back(substr(token, 1));
+		}
+	};
+	for (auto const &token : tokens) {
+		if (waitingFor) {
+			if (endsWith(token, waitingFor)) {
+				waitingFor = 0;
+			}
+			auto &tgt = *args.back().value;
+			if constexpr (ox::is_same_v<Str, ox::String>) {
+				tgt += substr(token, 0, token.size() - 1);
+			} else {
+				tgt = {tgt.data(), tgt.size() + token.size() - 1};
+			}
+		} else if (beginsWith(token, '"')) {
+			handleString(token, '"');
+		} else if (beginsWith(token, '\'')) {
+			handleString(token, '\'');
+		} else {
+			args.emplace_back(token);
+		}
+	}
+	if (waitingFor) {
+		return ox::Error{1, "unterminated string"};
+	}
+	return args;
+}
+
+template<typename Str = ox::String>
+[[nodiscard]]
+static constexpr bool testParse(ox::StringViewCR cmd, std::initializer_list<ox::StringView> const &expected) noexcept {
+	auto const [args, err] = parseCmd<Str>(cmd);
+	static constexpr auto equals = [](auto const &a, auto const &b) {
+		if (a.size() != b.size()) {
+			return false;
+		}
+		for (auto i = 0u; i < a.size(); ++i) {
+			if (a[i] != b[i]) {
+				return false;
+			}
+		}
+		return true;
+	};
+	return !err && equals(args, ox::Vector(expected));
+}
+
+static_assert(testParse("echo asdf", {"echo", "asdf"}));
+static_assert(testParse<ox::String>("echo asdf", {"echo", "asdf"}));
+
+static_assert(testParse("echo \"asdf\"", {"echo", "asdf"}));
+static_assert(testParse<ox::String>("echo \"asdf\"", {"echo", "asdf"}));
+
+static_assert(testParse("echo 'asdf'", {"echo", "asdf"}));
+static_assert(testParse<ox::String>("echo 'asdf'", {"echo", "asdf"}));
+
+static_assert(testParse("echo 'asdf' aoue", {"echo", "asdf", "aoue"}));
+static_assert(testParse<ox::String>("echo 'asdf' aoue", {"echo", "asdf", "aoue"}));
+
+export class Prompt {
+
+	private:
+		ox::String m_cmd;
+		ox::String m_workingDir{"/"};
+		ox::Vector<ox::String> m_prevCmds;
+
+	public:
+
+	private:
+
+};
+
+}