lib/rtl/memgen.c

   1 /* COPYRIGHT:       See COPYING in the top level directory
   2  * PROJECT:         ReactOS system libraries
   3  * FILE:            lib/rtl/mem.c
   4  * PURPOSE:         Memory functions
   5  * PROGRAMMER:      David Welch (welch@mcmail.com)
   6  */
   7
   8 /* INCLUDES *****************************************************************/
   9
  10 #include <rtl.h>
  11
  12 #define NDEBUG
  13 #include <debug.h>
  14
  15 #undef RtlUlonglongByteSwap
  16 #undef RtlUlongByteSwap
  17 #undef RtlUshortByteSwap
  18
  19 /*************************************************************************
  20  * RtlUshortByteSwap
  21  *
  22  * Swap the bytes of an unsigned short value.
  23  *
  24  * NOTES
  25  * Based on the inline versions in Wine winternl.h
  26  *
  27  * @implemented
  28  */
  29 USHORT FASTCALL
  30 RtlUshortByteSwap (IN USHORT Source)
  31 {
  32    return (Source >> 8) | (Source << 8);
  33 }
  34
  35
  36
  37 /*************************************************************************
  38  * RtlUlongByteSwap    [NTDLL.@]
  39  *
  40  * Swap the bytes of an unsigned int value.
  41  *
  42  * NOTES
  43  * Based on the inline versions in Wine winternl.h
  44  *
  45  * @implemented
  46  */
  47 ULONG
  48 FASTCALL
  49 RtlUlongByteSwap(
  50    IN ULONG Source
  51 )
  52 {
  53    return ((ULONG)RtlUshortByteSwap((USHORT)Source) << 16) | RtlUshortByteSwap((USHORT)(Source >> 16));
  54 }
  55
  56
  57 /*************************************************************************
  58  * RtlUlonglongByteSwap
  59  *
  60  * Swap the bytes of an unsigned long long value.
  61  *
  62  * PARAMS
  63  *  i [I] Value to swap bytes of
  64  *
  65  * RETURNS
  66  *  The value with its bytes swapped.
  67  *
  68  * @implemented
  69  */
  70 ULONGLONG FASTCALL
  71 RtlUlonglongByteSwap (IN ULONGLONG Source)
  72 {
  73    return ((ULONGLONG) RtlUlongByteSwap (Source) << 32) | RtlUlongByteSwap (Source>>32);
  74 }
  75
  76
  77 /* EOF */