Feature/include refactor (#675)

* Refactor of path handling.
* Added PathInfo
* Changed ISlangFileSystem - such that has separate concepts of reading a file, getting a relative path and getting a canonical path
* Added support for getting a canonical path for windows/linux
* Made maps/testing around canonicalPaths
* User output remains around 'foundPath' - which is the same as before

* Small improvements around PathInfo
* Added a type and make constructors to make clear the different 'path' uses
* Fixed bug in findViewRecursively

* Checking and reporting for ignored #pragma once.

* Removed SLANG_PATH_TYPE_NONE as doesn't serve any useful purpose.

* Improve comments in slang.h aroung ISlangFileSystem

* Remove the need for <windows.h> in slang-io.cpp

* Ran premake5.

* Improvements and fixes around PathInfo.

* Fix typo on linix GetCanonical

* Make the ISlangFileSystem the same as before, and ISlangFileSystem contain the new methods.
Internally it always uses the ISlangFileSystemExt, and will wrap a ISlangFileSystem with WrapFileSystem, if it is determined (via queryInterface) that it doesn't implement the full interface.

3 files changed, 30 insertions, 0 deletions

diff --git a/tools/slang-test/slang-test.vcxproj b/tools/slang-test/slang-test.vcxproj
index 54ea6f342..acaa07d3e 100644
--- a/tools/slang-test/slang-test.vcxproj
+++ b/tools/slang-test/slang-test.vcxproj
@@ -174,6 +174,7 @@
     <ClCompile Include="unit-test-byte-encode.cpp" />
     <ClCompile Include="unit-test-free-list.cpp" />
     <ClCompile Include="unit-test-memory-arena.cpp" />
+    <ClCompile Include="unit-test-path.cpp" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\..\source\core\core.vcxproj">
diff --git a/tools/slang-test/slang-test.vcxproj.filters b/tools/slang-test/slang-test.vcxproj.filters
index b34d45798..fc65986f4 100644
--- a/tools/slang-test/slang-test.vcxproj.filters
+++ b/tools/slang-test/slang-test.vcxproj.filters
@@ -41,5 +41,8 @@
     <ClCompile Include="unit-test-memory-arena.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="unit-test-path.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/tools/slang-test/unit-test-path.cpp b/tools/slang-test/unit-test-path.cpp
new file mode 100644
index 000000000..ddaa39d6d
--- /dev/null
+++ b/tools/slang-test/unit-test-path.cpp
@@ -0,0 +1,26 @@
+// unit-test-path.cpp
+
+#include "../../source/core/slang-io.h"
+
+
+#include "test-context.h"
+
+using namespace Slang;
+
+static void pathUnitTest()
+{
+    {
+        String path;
+        SlangResult res = Path::GetCanonical(".", path);
+        SLANG_CHECK(SLANG_SUCCEEDED(res));
+
+        String parentPath;
+        res = Path::GetCanonical("..", parentPath);
+        SLANG_CHECK(SLANG_SUCCEEDED(res));
+
+        String parentPath2 = Path::GetDirectoryName(path);
+        SLANG_CHECK(parentPath == parentPath2);
+    }
+}
+
+SLANG_UNIT_TEST("Path", pathUnitTest);
\ No newline at end of file