/*******************************************************************************
################################################################################
#   Copyright (c) [2017-2019] [Radisys]                                        #
#                                                                              #
#   Licensed under the Apache License, Version 2.0 (the "License");            #
#   you may not use this file except in compliance with the License.           #
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#       http://www.apache.org/licenses/LICENSE-2.0                             #
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#   Unless required by applicable law or agreed to in writing, software        #
#   distributed under the License is distributed on an "AS IS" BASIS,          #
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#   See the License for the specific language governing permissions and        #
#   limitations under the License.                                             #
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*******************************************************************************/

#include "common_def.h"

/**
 * @brief frequency domain allocation function. 
 *
 * @details
 *
 *     Function: schAllocFreqDomRscType0
 *     
 *     This function does allocation in frequency domain resource.
 *     This is a bitmap defining  non-overlapping groups of 6 PRBs in ascending order.
 *     
 *  @param[in]  startPrb - start PRB from where the freq alloc starts.  
 *  @param[in]  prbSize - number of PRBs to be allocted.
 *  @param[in]  freqDomain - 6 bytes of info, each bit represents a group of 6 PRB.
 *  @return   void
 **/
void schAllocFreqDomRscType0(uint16_t startPrb, uint16_t prbSize, uint8_t *freqDomain)
{
   uint8_t remBits = prbSize; /* each bit represents 6 PRBs */
   uint8_t firstByte = 1;
   uint8_t numBits,startBit,byteCount = 5;

   while(remBits)
   {
      /* when the startPrb is not in this byteCount */
      if(startPrb/8)
      {
         startPrb -= 8;
         byteCount--;
         continue;
      }

      /* max bytecount is 6 nearly equal to 45 bits*/
      if(byteCount >= 6)
          break;

      /* when we are filling the second byte, then the start should be equal to 0 */
      if(firstByte)
         startBit = startPrb;
      else
         startBit = 0;

      /* calculate the number of bits to be set in this byte */
      if((remBits+startPrb) <= 8)
         numBits = remBits;
      else
         numBits = 8 - startBit;

      /* bit operation to set the bits */
		SET_BITS_MSB((startBit % 8),numBits,freqDomain[byteCount])
      firstByte = 0;

      /* the ramaining bits should be subtracted with the numBits set in this byte */
      remBits -= numBits;
      byteCount--;
   }
}



/**********************************************************************
         End of file
**********************************************************************/