Add OpenVR SDK to third_party

third_party/openvr/src/src/vrcommon/pathtools_public.h

Index: third_party/openvr/src/src/vrcommon/pathtools_public.h
diff --git a/third_party/openvr/src/src/vrcommon/pathtools_public.h b/third_party/openvr/src/src/vrcommon/pathtools_public.h
new file mode 100644
index 0000000000000000000000000000000000000000..594903b4aec0df3f2e2b77166eddbfa6f6f3e794
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+++ b/third_party/openvr/src/src/vrcommon/pathtools_public.h
@@ -0,0 +1,129 @@
+//========= Copyright Valve Corporation ============//
+#pragma once
+
+#include <string>
+#include <stdint.h>
+
+/** Returns the path (including filename) to the current executable */
+std::string Path_GetExecutablePath();
+
+/** Returns the path of the current working directory */
+std::string Path_GetWorkingDirectory();
+
+/** Sets the path of the current working directory. Returns true if this was successful. */
+bool Path_SetWorkingDirectory( const std::string & sPath );
+
+/** returns the path (including filename) of the current shared lib or DLL */
+std::string Path_GetThisModulePath();
+
+/** Returns the specified path without its filename.
+* If slash is unspecified the native path separator of the current platform
+* will be used. */
+std::string Path_StripFilename( const std::string & sPath, char slash = 0 );
+
+/** returns just the filename from the provided full or relative path. */
+std::string Path_StripDirectory( const std::string & sPath, char slash = 0 );
+
+/** returns just the filename with no extension of the provided filename. 
+* If there is a path the path is left intact. */
+std::string Path_StripExtension( const std::string & sPath );
+
+/** returns just extension of the provided filename (if any). */
+std::string Path_GetExtension( const std::string & sPath );
+
+/** Returns true if the path is absolute */
+bool Path_IsAbsolute( const std::string & sPath );
+
+/** Makes an absolute path from a relative path and a base path */
+std::string Path_MakeAbsolute( const std::string & sRelativePath, const std::string & sBasePath, char slash = 0 );
+
+/** Fixes the directory separators for the current platform.
+* If slash is unspecified the native path separator of the current platform
+* will be used. */
+std::string Path_FixSlashes( const std::string & sPath, char slash = 0 );
+
+/** Returns the path separator for the current platform */
+char Path_GetSlash();
+
+/** Jams two paths together with the right kind of slash */
+std::string Path_Join( const std::string & first, const std::string & second, char slash = 0 );
+std::string Path_Join( const std::string & first, const std::string & second, const std::string & third, char slash = 0 );
+std::string Path_Join( const std::string & first, const std::string & second, const std::string & third, const std::string &fourth, char slash = 0 );
+std::string Path_Join( 
+	const std::string & first, 
+	const std::string & second, 
+	const std::string & third, 
+	const std::string & fourth, 
+	const std::string & fifth, 
+	char slash = 0 );
+
+
+/** Removes redundant <dir>/.. elements in the path. Returns an empty path if the 
+* specified path has a broken number of directories for its number of ..s.
+* If slash is unspecified the native path separator of the current platform
+* will be used. */
+std::string Path_Compact( const std::string & sRawPath, char slash = 0 );
+
+//** Removed trailing slashes */
+std::string Path_RemoveTrailingSlash( const std::string & sRawPath, char slash = 0 );
+
+/** returns true if the specified path exists and is a directory */
+bool Path_IsDirectory( const std::string & sPath );
+
+/** returns true if the specified path represents an app bundle */
+bool Path_IsAppBundle( const std::string & sPath );
+
+/** returns true if the the path exists */
+bool Path_Exists( const std::string & sPath );
+
+/** Helper functions to find parent directories or subdirectories of parent directories */
+std::string Path_FindParentDirectoryRecursively( const std::string &strStartDirectory, const std::string &strDirectoryName );
+std::string Path_FindParentSubDirectoryRecursively( const std::string &strStartDirectory, const std::string &strDirectoryName );
+
+/** Path operations to read or write text/binary files */
+unsigned char * Path_ReadBinaryFile( const std::string &strFilename, int *pSize );
+uint32_t  Path_ReadBinaryFile( const std::string &strFilename, unsigned char *pBuffer, uint32_t unSize );
+bool Path_WriteBinaryFile( const std::string &strFilename, unsigned char *pData, unsigned nSize );
+std::string Path_ReadTextFile( const std::string &strFilename );
+bool Path_WriteStringToTextFile( const std::string &strFilename, const char *pchData );
+bool Path_WriteStringToTextFileAtomic( const std::string &strFilename, const char *pchData );
+
+/** Returns a file:// url for paths, or an http or https url if that's what was provided */
+std::string Path_FilePathToUrl( const std::string & sRelativePath, const std::string & sBasePath );
+
+/** Strips off file:// off a URL and returns the path. For other kinds of URLs an empty string is returned */
+std::string Path_UrlToFilePath( const std::string & sFileUrl );
+
+/** Returns the root of the directory the system wants us to store user documents in */
+std::string GetUserDocumentsPath();
+
+#ifndef MAX_UNICODE_PATH
+	#define MAX_UNICODE_PATH 32767
+#endif
+
+#ifndef MAX_UNICODE_PATH_IN_UTF8
+	#define MAX_UNICODE_PATH_IN_UTF8 (MAX_UNICODE_PATH * 4)
+#endif
+
+//-----------------------------------------------------------------------------
+#if defined(WIN32)
+#define DYNAMIC_LIB_EXT	".dll"
+#ifdef _WIN64
+#define PLATSUBDIR	"win64"
+#else
+#define PLATSUBDIR	"win32"
+#endif
+#elif defined(OSX)
+#define DYNAMIC_LIB_EXT	".dylib"
+#define PLATSUBDIR	"osx32"
+#elif defined(LINUX)
+#define DYNAMIC_LIB_EXT	".so"
+#if defined( LINUX32 )
+#define PLATSUBDIR	"linux32"
+#else
+#define PLATSUBDIR	"linux64"
+#endif
+#else
+#warning "Unknown platform for PLATSUBDIR"
+#define PLATSUBDIR	"unknown_platform"
+#endif