/*
 * cbuffer.h
 *
 *	Copyright (C) 1997 by Sony Computer Entertainment
 *			All rights Reserved
 */

#define CBUFFERSIZE	(1024)
typedef struct _cbuffer {
    int		  count;
    int		  puti;
    int		  geti;
    unsigned char buf[CBUFFERSIZE];
} cbuffer;

#define clean_cbuffer(bf)	((bf).count = 0, (bf).puti = 0, (bf).geti = 0)
#define is_full_cbuffer(bf)	((bf).count == CBUFFERSIZE)
#define is_empty_cbuffer(bf)	((bf).count == 0)
#define cbuffer_count(bf)	((bf).count)

/* you must check buffer is'nt full ! */
#define put_cbuffer(bf,ch)	((bf).buf[(bf).puti]=(ch), \
				 (bf).puti = ((bf).puti+1 < CBUFFERSIZE) \
				 ? (bf).puti+1 \
				 : 0 , (bf).count ++)

/* you must check data exist in buffer ! */
#define get_cbuffer(bf,var)	((var)=(bf).buf[(bf).geti], \
				 (bf).geti = ((bf).geti+1 < CBUFFERSIZE) \
				 ? (bf).geti+1 \
				 : 0 , (bf).count --)