src/add-ons/kernel/drivers/network/wwan/usb_beceemwmx/util.cpp

   1 /*
   2  *      Beceem WiMax USB Driver.
   3  *      Copyright (c) 2010 Alexander von Gluck <kallisti5@unixzen.com>
   4  *      Distributed under the terms of the MIT license.
   5  *
   6  */
   7
   8
   9 #include <ByteOrder.h>
  10 #include "util.h"
  11
  12
  13 void
  14 convertEndian(bool write, uint32 uiByteCount, uint32* buffer)
  15 {
  16         uint32 uiIndex = 0;
  17
  18         if (write == true) {
  19                 for (uiIndex = 0; uiIndex < (uiByteCount / sizeof(uint32)); uiIndex++) {
  20                         buffer[uiIndex] = htonl(buffer[uiIndex]);
  21                 }
  22         } else {
  23                 for (uiIndex = 0; uiIndex < (uiByteCount / sizeof(uint32)); uiIndex++) {
  24                         buffer[uiIndex] = ntohl(buffer[uiIndex]);
  25                 }
  26         }
  27 }
  28
  29
  30 uint16_t
  31 CalculateHWChecksum(uint8_t* pu8Buffer, uint32 u32Size)
  32 {
  33         uint16_t u16CheckSum = 0;
  34         while (u32Size--) {
  35                 u16CheckSum += (uint8_t)~(*pu8Buffer);
  36                 pu8Buffer++;
  37         }
  38         return u16CheckSum;
  39 }