source: svn/trunk/newcon3bcm2_21bu/dta/src/app/getbits.h @ 2

/***************************************************************************
 *     Copyright (c) 2003-2008, Broadcom Corporation
 *     All Rights Reserved
 *     Confidential Property of Broadcom Corporation
 *
 *  THIS SOFTWARE MAY ONLY BE USED SUBJECT TO AN EXECUTED SOFTWARE LICENSE
 *  AGREEMENT  BETWEEN THE USER AND BROADCOM.  YOU HAVE NO RIGHT TO USE OR
 *  EXPLOIT THIS MATERIAL EXCEPT SUBJECT TO THE TERMS OF SUCH AN AGREEMENT.
 *
 * $brcm_Workfile: $
 * $brcm_Revision: $
 * $brcm_Date: $
 *
 * Module Description:
 *
 * Revision History:
 *
 * $brcm_Log: $
 * 
 *
 ***************************************************************************/
#if !defined(__GETBITS_H__)
#define __GETBITS_H__

#include "bapp_types.h"

struct bit_state_t {
    unsigned char * data;         /* data start pointer */
    size_t bindex;                /* bit index */
};
/*
  Return bit_count of bits from the bitstream. bit_count can be anywhere
  from 0 to 16. The bit_state_t structure has to be reset after 536870911
  bytes as bindex is 32 bit value. This is not a practical limitation.
 */
unsigned int get_bits(size_t bit_count, struct bit_state_t * bs);

/* Return bit_count of bits from bitstream. bit_count can be anywhere from 0 
   to 32. This function can be called only when bit field to be returned is 
   aligned on a byte boundary. Most new standards follow this rule.
 */
unsigned int get_bits_aligned(size_t bit_count, struct bit_state_t * bs);

#endif