rtxBitDecode.h

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/*
 * Copyright (c) 2007-2018 Objective Systems, Inc.
 *
 * This software is furnished under a license and may be used and copied
 * only in accordance with the terms of such license and with the
 * inclusion of the above copyright notice. This software or any other
 * copies thereof may not be provided or otherwise made available to any
 * other person. No title to and ownership of the software is hereby
 * transferred.
 *
 * The information in this software is subject to change without notice
 * and should not be construed as a commitment by Objective Systems, Inc.
 *
 * PROPRIETARY NOTICE
 *
 * This software is an unpublished work subject to a confidentiality agreement
 * and is protected by copyright and trade secret law.  Unauthorized copying,
 * redistribution or other use of this work is prohibited.
 *
 * The above notice of copyright on this source code product does not indicate
 * any actual or intended publication of such source code.
 *
 *****************************************************************************/
#ifndef _RTXBITDECODE_H_
#define _RTXBITDECODE_H_

#include "rtxsrc/rtxContext.h"

#ifdef __cplusplus
extern "C" {
#endif

#define DEC_BIT(pctxt,pvalue) \
(((pctxt)->buffer.byteIndex >= (pctxt)->buffer.size) ? \
   rtxDecBit (pctxt, pvalue) \
   : \
   (*(pvalue) = (pctxt)->buffer.data[(pctxt)->buffer.byteIndex], \
   --(pctxt)->buffer.bitOffset == 0 ? \
      ((pctxt)->buffer.bitOffset = 8, (pctxt)->buffer.byteIndex++) \
      : \
      (*(pvalue) >>= (pctxt)->buffer.bitOffset), \
   *(pvalue) &= 1, \
   0))

EXTERNRT int rtxMoveBitCursor (OSCTXT* pctxt, int bitOffset);

EXTERNRT int rtxDecBit (OSCTXT* pctxt, OSBOOL* pvalue);

EXTERNRT int rtxDecBits (OSCTXT* pctxt, OSUINT32* pvalue, OSSIZE nbits);

EXTERNRT int rtxDecBitsToSize (OSCTXT* pctxt, OSSIZE* pvalue, OSSIZE nbits);

EXTERNRT int rtxDecBitsToByte
(OSCTXT* pctxt, OSUINT8* pvalue, OSUINT8 nbits);

EXTERNRT int rtxDecBitsToUInt16
(OSCTXT* pctxt, OSUINT16* pvalue, OSUINT8 nbits);

EXTERNRT int rtxDecBitsToByteArray
(OSCTXT* pctxt, OSOCTET* pbuffer, OSSIZE bufsiz, OSSIZE nbits);

EXTERNRT int rtxPeekBit (OSCTXT* pctxt, OSBOOL* pvalue);

EXTERNRT int rtxSkipBits (OSCTXT* pctxt, OSSIZE nbits);

#ifdef __cplusplus
}
#endif

#endif