class c4_Strategy

A strategy encapsulates code dealing with the I/O system interface.

Public members
	c4_Strategy ();
virtual	~c4_Strategy ();
virtual bool	IsValid () const; True if we can do I/O with this object
virtual void	DataSeek (t4_i32 position_); Set file position
virtual int	DataRead (void* buffer_, int length_); Read a number of bytes
void	DataLoad (void* buffer_, int length_); Read an exact number of bytes
virtual bool	DataWrite (const void* buffer_, int length_); Write a number of bytes, return true if successful
virtual void	DataCommit (t4_i32 newSize_); Flush and truncate file
virtual void	ResetFileMapping (); Override to support memory-mapped files
bool	_keepAfterCommit; Keep data in memory after each commit (default is false)
bool	_bytesFlipped; True if the storage format is not native (default is false)
int	_failure; Error code of last failed I/O operation, zero if I/O was ok
const t4_byte*	_mapStart; First byte in file mapping, zero if not active
const t4_byte*	_mapLimit; Past last byte in file mapping, zero if not active

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Header file

"mk4.h"   --   Dec 9, 1999