Add OpenVR SDK to third_party

third_party/openvr/src/src/vrcommon/strtools_public.h

Index: third_party/openvr/src/src/vrcommon/strtools_public.h
diff --git a/third_party/openvr/src/src/vrcommon/strtools_public.h b/third_party/openvr/src/src/vrcommon/strtools_public.h
new file mode 100644
index 0000000000000000000000000000000000000000..01049cbac83929748f4cbb0b962341ca33ffef10
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+++ b/third_party/openvr/src/src/vrcommon/strtools_public.h
@@ -0,0 +1,126 @@
+//========= Copyright Valve Corporation ============//
+#pragma once
+
+#include <string>
+#include <stdint.h>
+#include <sys/types.h>
+
+/** returns true if the string has the prefix */
+bool StringHasPrefix( const std::string & sString, const std::string & sPrefix );
+bool StringHasPrefixCaseSensitive( const std::string & sString, const std::string & sPrefix );
+
+/** returns if the string has the suffix */
+bool StringHasSuffix( const std::string &sString, const std::string &sSuffix );
+bool StringHasSuffixCaseSensitive( const std::string &sString, const std::string &sSuffix );
+
+/** converts a UTF-16 string to a UTF-8 string */
+std::string UTF16to8(const wchar_t * in);
+
+/** converts a UTF-8 string to a UTF-16 string */
+std::wstring UTF8to16(const char * in);
+#define Utf16FromUtf8 UTF8to16
+
+/** safely copy a string into a buffer */
+void strcpy_safe( char *pchBuffer, size_t unBufferSizeBytes, const char *pchSource );
+template< size_t bufferSize >
+void strcpy_safe( char (& buffer) [ bufferSize ], const char *pchSource ) 
+{
+	strcpy_safe( buffer, bufferSize, pchSource );
+}
+
+
+/** converts a string to upper case */
+std::string StringToUpper( const std::string & sString );
+
+/** converts a string to lower case */
+std::string StringToLower( const std::string & sString );
+
+// we stricmp (from WIN) but it isn't POSIX - OSX/LINUX have strcasecmp so just inline bridge to it
+#if defined( OSX ) || defined( LINUX )
+#include <strings.h>
+inline int stricmp(const char *pStr1, const char *pStr2) { return strcasecmp(pStr1,pStr2); }
+#define _stricmp stricmp
+inline int strnicmp( const char *pStr1, const char *pStr2, size_t unBufferLen ) { return strncasecmp( pStr1,pStr2, unBufferLen ); }
+#define _strnicmp strnicmp
+
+#define _vsnprintf_s vsnprintf
+
+#define _TRUNCATE ((size_t)-1)
+
+#endif
+
+#if defined( OSX )
+// behaviors ensure NULL-termination at least as well as _TRUNCATE does, but
+// wcsncpy_s/strncpy_s can non-NULL-terminate, wcslcpy/strlcpy can not.
+inline errno_t wcsncpy_s(wchar_t *strDest, size_t numberOfElements, const wchar_t *strSource, size_t count)
+{
+	return wcslcpy(strDest, strSource, numberOfElements);
+}
+
+inline errno_t strncpy_s(char *strDest, size_t numberOfElements, const char *strSource, size_t count)
+{
+	return strlcpy(strDest, strSource, numberOfElements);
+}
+
+#endif
+
+#if defined( LINUX )
+// this implementation does not return whether or not the destination was 
+// truncated, but that is straightforward to fix if anybody actually needs the
+// return code. 
+#include "string.h"
+inline void wcsncpy_s(wchar_t *strDest, size_t numberOfElements, const wchar_t *strSource, size_t count)
+{
+	wcsncpy(strDest, strSource, numberOfElements);
+	strDest[numberOfElements-1] = '\0';
+}
+
+inline void strncpy_s(char *strDest, size_t numberOfElements, const char *strSource, size_t count)
+{
+	strncpy(strDest, strSource, numberOfElements);
+	strDest[numberOfElements-1] = '\0';
+}
+
+#endif
+
+#if defined( _WIN32 ) && _MSC_VER < 1800
+inline uint64_t strtoull(const char *str, char **endptr, int base) { return _strtoui64( str, endptr, base ); }
+#endif
+
+/* Handles copying a std::string into a buffer as would be provided in an API */
+uint32_t ReturnStdString( const std::string & sValue, char *pchBuffer, uint32_t unBufferLen );
+
+/* Handles copying a buffer into an std::string and auto adds null terminator */
+void BufferToStdString( std::string & sDest, const char *pchBuffer, uint32_t unBufferLen );
+
+/** Returns a std::string from a uint64_t */
+std::string Uint64ToString( uint64_t ulValue );
+
+/** returns a uint64_t from a string */
+uint64_t StringToUint64( const std::string & sValue );
+
+//-----------------------------------------------------------------------------
+// Purpose: Encodes a string (or binary data) from URL encoding format, see rfc1738 section 2.2.  
+//          This version of the call isn't a strict RFC implementation, but uses + for space as is
+//          the standard in HTML form encoding, despite it not being part of the RFC.
+//
+//          Dest buffer should be at least as large as source buffer to guarantee room for decode.
+//-----------------------------------------------------------------------------
+void V_URLEncode( char *pchDest, int nDestLen, const char *pchSource, int nSourceLen );
+
+//-----------------------------------------------------------------------------
+// Purpose: Decodes a string (or binary data) from URL encoding format, see rfc1738 section 2.2.  
+//          This version of the call isn't a strict RFC implementation, but uses + for space as is
+//          the standard in HTML form encoding, despite it not being part of the RFC.
+//
+//          Dest buffer should be at least as large as source buffer to guarantee room for decode.
+//			Dest buffer being the same as the source buffer (decode in-place) is explicitly allowed.
+//-----------------------------------------------------------------------------
+size_t V_URLDecode( char *pchDecodeDest, int nDecodeDestLen, const char *pchEncodedSource, int nEncodedSourceLen );
+
+//-----------------------------------------------------------------------------
+// Purpose: strip extension from a path
+//-----------------------------------------------------------------------------
+void V_StripExtension( std::string &in );
+
+