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public/tier1/fileio.h

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: A collection of utility classes to simplify file I/O, and
+//			as much as possible contain portability problems. Here avoiding 
+//			including windows.h.
+//
+//=============================================================================
+
+#ifndef FILEIO_H
+#define FILEIO_H
+
+#if defined (_WIN32)
+#else
+#include <sys/types.h>
+#include <sys/stat.h>
+#if !defined( _PS3 )
+#include <signal.h>
+#endif // _PS3
+#endif
+
+#include "tier0/platform.h"
+#include "tier1/utlstring.h"
+#include "tier1/utllinkedlist.h"
+
+const int64 k_nMillion = 1000000;
+const int64 k_nThousand = 1000;
+const int64 k_nKiloByte = 1024;
+const int64 k_nMegabyte = k_nKiloByte * k_nKiloByte;
+const int64 k_nGigabyte = k_nMegabyte * k_nKiloByte;
+
+class CPathString
+{
+public:
+
+	// Constructors: Automatically fixes slashes and removes double slashes when the object is
+	// constructed, and then knows how to append magic \\?\ on Windows for unicode paths
+	CPathString( const char *pchUTF8Path );
+	~CPathString();
+
+	// Gets the path in UTF8
+	const char *GetUTF8Path();
+
+	// Gets wchar_t based path, with \\?\ pre-pended (allowing long paths on Win32, should only be used with unicode aware filesystem calls)
+	const wchar_t *GetWCharPathPrePended();
+
+private:
+
+	void PopulateWCharPath();
+
+	char *m_pchUTF8Path;
+	wchar_t *m_pwchWideCharPathPrepended;
+
+};
+
+#if !defined(_PS3)
+//-----------------------------------------------------------------------------
+// Purpose: Encapsulates watching a directory for file changes
+//-----------------------------------------------------------------------------
+class CDirWatcher
+{
+public:
+	CDirWatcher();
+	~CDirWatcher();
+
+	// only one directory can be watched at a time
+	void SetDirToWatch( const char *pchDir );
+
+	// retrieve any changes
+	bool GetChangedFile( CUtlString *psFile );
+
+#ifdef DBGFLAG_VALIDATE
+	void Validate( CValidator &validator, const char *pchName );
+#endif
+
+private:
+	CUtlLinkedList<CUtlString> m_listChangedFiles;
+	void *m_hFile;
+	void *m_pOverlapped;
+	void *m_pFileInfo;
+#ifdef OSX
+public:
+	struct timespec m_modTime;
+	void AddFileToChangeList( const char *pchFile );
+	CUtlString m_BaseDir;
+private:
+	void *m_WatcherStream;
+#endif
+	friend class CDirWatcherFriend;
+
+#ifdef LINUX
+	void AddFileToChangeList( const char *pchFile );
+#endif
+#ifdef WIN32
+	// used by callback functions to push a file onto the list
+	void AddFileToChangeList( const char *pchFile );
+	void PostDirWatch();
+#endif
+};
+#endif // _PS3
+
+#endif // FILEIO_H