1 files changed, 108 insertions, 0 deletions

diff --git a/source/OSSupport/File.h b/source/OSSupport/File.h
new file mode 100644
index 000000000..d16784236
--- /dev/null
+++ b/source/OSSupport/File.h
@@ -0,0 +1,108 @@
+
+// cFile.h
+
+// Interfaces to the cFile class providing an OS-independent abstraction of a file.
+
+/*
+The object is optimized towards binary reads.
+The object has no multithreading locks, don't use from multiple threads!
+Usage:
+1, Construct a cFile instance (no-param constructor)
+2, Open a file using Open(), check return value for success
+3, Read / write
+4, Destroy the instance
+
+-- OR --
+
+1, Construct a cFile instance opening the file (filename-param constructor)
+2, Check if the file was opened using IsOpen()
+3, Read / write
+4, Destroy the instance
+*/
+
+
+
+
+
+#pragma once
+#ifndef CFILE_H_INCLUDED
+#define CFILE_H_INCLUDED
+
+
+
+
+
+#ifndef _WIN32
+	#define USE_STDIO_FILE
+#endif  // _WIN32
+
+// DEBUG:
+#define USE_STDIO_FILE
+
+
+
+
+
+class cFile
+{
+public:
+	/// The mode in which to open the file
+	enum EMode
+	{
+		fmRead,      // Read-only. If the file doesn't exist, object will not be valid
+		fmWrite,     // Write-only. If the file already exists, it will be overwritten
+		fmReadWrite  // Read/write. If the file already exists, it will be left intact; writing will overwrite the data from the beginning
+	} ;
+	
+	/// Simple constructor - creates an unopened file object, use Open() to open / create a real file
+	cFile(void);
+	
+	/// Constructs and opens / creates the file specified, use IsOpen() to check for success
+	cFile(const AString & iFileName, EMode iMode);
+	
+	/// Auto-closes the file, if open
+	~cFile();
+	
+	bool Open(const AString & iFileName, EMode iMode);
+	void Close(void);
+	bool IsOpen(void) const;
+	bool IsEOF(void) const;
+	
+	/// Reads  up to iNumBytes bytes into iBuffer, returns the number of bytes actually read,    or -1 on failure; asserts if not open
+	int Read (void * iBuffer,       int iNumBytes);
+	
+	/// Writes up to iNumBytes bytes from iBuffer, returns the number of bytes actually written, or -1 on failure; asserts if not open
+	int Write(const void * iBuffer, int iNumBytes);
+	
+	/// Seeks to iPosition bytes from file start, returns old position or -1 for failure; asserts if not open
+	int Seek (int iPosition);
+	
+	/// Returns the current position (bytes from file start) or -1 for failure; asserts if not open
+	int Tell (void) const;
+	
+	/// Returns the size of file, in bytes, or -1 for failure; asserts if not open
+	int GetSize(void) const;
+	
+	/// Reads the file from current position till EOF into an AString; returns the number of bytes read or -1 for error
+	int ReadRestOfFile(AString & a_Contents);
+	
+	/// Returns true if the file specified exists
+	static bool Exists(const AString & a_FileName);
+	
+private:
+	#ifdef USE_STDIO_FILE
+	FILE * m_File;
+	#else
+	HANDLE m_File;
+	#endif
+} ;
+
+
+
+
+
+#endif  // CFILE_H_INCLUDED
+
+
+
+