ams: support building unit test programs on windows/linux/macos

libraries/libstratosphere/source/fs/tests/fs_path_utility_tests.cpp

@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <stratosphere.hpp>
+
+namespace ams::fs {
+
+    namespace {
+
+        struct IsSubPathTestData {
+            const char *lhs;
+            const char *rhs;
+            bool is_sub_path;
+        };
+
+        template<size_t N, size_t Ix = 0>
+        consteval bool DoIsSubPathTests(const IsSubPathTestData (&tests)[N]) {
+            if constexpr (Ix >= N) {
+                return true;
+            }
+
+            const auto &test = tests[Ix];
+            if (::ams::fs::IsSubPath(test.lhs, test.rhs) != test.is_sub_path) {
+                return false;
+            }
+
+            if constexpr (Ix < N) {
+                return DoIsSubPathTests<N, Ix + 1>(tests);
+            } else {
+                AMS_ASSUME(false);
+            }
+        }
+
+        consteval bool TestIsSubPath() {
+            constexpr IsSubPathTestData Tests[] = {
+                { "//a/b", "/a", false },
+                { "/a", "//a/b", false },
+                { "//a/b", "\\\\a", false },
+                { "//a/b", "//a", true },
+                { "/", "/a", true },
+                { "/a", "/", true },
+                { "/", "/", false },
+                { "", "", false },
+                { "/", "", true },
+                { "/", "mount:/a", false },
+                { "mount:/", "mount:/", false },
+                { "mount:/a/b", "mount:/a/b", false },
+                { "mount:/a/b", "mount:/a/b/c", true },
+                { "/a/b", "/a/b/c", true },
+                { "/a/b/c", "/a/b", true },
+                { "/a/b", "/a/b", false },
+                { "/a/b", "/a/b\\c", false }
+            };
+
+            return DoIsSubPathTests(Tests);
+        }
+        static_assert(TestIsSubPath());
+
+    }
+
+}