tomwalters@0: /*
tomwalters@0: 
tomwalters@0:     buffer.h
tomwalters@0:     ========
tomwalters@0: 
tomwalters@0:     simple generic buffer abstraction.
tomwalters@0: 
tomwalters@0: */
tomwalters@0: 
tomwalters@0: #define DeleteBuffer(        _buffer        ) ( FreeBuffer( _buffer ), _buffer = 0 )
tomwalters@0: 
tomwalters@0: #define       BufferSize(    _buffer        ) ( ( _buffer )->size         )
tomwalters@0: #define       BufferPointer( _buffer        ) ( ( _buffer )->addr         )
tomwalters@0: #define    SetBufferSize(    _buffer, _size ) ( ( _buffer )->size = _size )
tomwalters@0: #define    SetBufferPointer( _buffer, _addr ) ( ( _buffer )->addr = _addr )
tomwalters@0: #define  SizedBufferPointer( _buffer, _size ) ( BufferPointer( ( ( _size ) > BufferSize( _buffer ) ) ? ResizedBuffer( _buffer, _size ) : _buffer ) )
tomwalters@0: 
tomwalters@0: typedef struct _buffer *Buffer ;
tomwalters@0: 
tomwalters@0: 
tomwalters@0: struct _buffer { Pointer addr ; unsigned size, refs ; } ;
tomwalters@0: 
tomwalters@0: extern Buffer NewBuffer(     /* char  where[] */ ) ;
tomwalters@0: extern Buffer SharedBuffer(  /* Buffer buffer */ ) ;
tomwalters@0: extern Buffer ResizedBuffer( /* Buffer buffer, unsigned size */ ) ;
tomwalters@0: extern void   FreeBuffer(    /* Buffer buffer */ ) ;