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.

1 files changed, 38 insertions, 2 deletions

diff --git a/source/core/slang-io.cpp b/source/core/slang-io.cpp
index 24d5aa412..ab093f577 100644
--- a/source/core/slang-io.cpp
+++ b/source/core/slang-io.cpp
@@ -1,13 +1,20 @@
 #include "slang-io.h"
 #include "exception.h"
+
 #ifndef __STDC__
-#define __STDC__ 1
+#   define __STDC__ 1
 #endif
+
 #include <sys/stat.h>
+
 #ifdef _WIN32
-#include <direct.h>
+#   include <direct.h>
 #endif
 
+#include <limits.h> /* PATH_MAX */
+#include <stdio.h>
+#include <stdlib.h>
+
 namespace Slang
 {
 	bool File::Exists(const String & fileName)
@@ -125,6 +132,32 @@ namespace Slang
 #endif
 	}
 
+    /* static */SlangResult Path::GetCanonical(const String & path, String & canonicalPathOut)
+    {
+#if defined(_WIN32)
+        // https://msdn.microsoft.com/en-us/library/506720ff.aspx
+        wchar_t* absPath = ::_wfullpath(nullptr, path.ToWString(), 0);
+        if (!absPath)
+        {
+            return SLANG_FAIL;
+        }  
+
+        canonicalPathOut =  String::FromWString(absPath);
+        ::free(absPath);
+        return SLANG_OK;
+#else
+        // http://man7.org/linux/man-pages/man3/realpath.3.html
+        char* canonicalPath = ::realpath(path.begin(), nullptr);
+        if (canonicalPath)
+        {
+            canonicalPathOut = canonicalPath;
+            ::free(canonicalPath);
+            return SLANG_OK;
+        }
+        return SLANG_FAIL;
+#endif
+    }
+
 	Slang::String File::ReadAllText(const Slang::String & fileName)
 	{
 		StreamReader reader(new FileStream(fileName, FileMode::Open, FileAccess::Read, FileShare::ReadWrite));
@@ -152,4 +185,7 @@ namespace Slang
 		StreamWriter writer(new FileStream(fileName, FileMode::Create));
 		writer.Write(text);
 	}
+
+
 }
+