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Icetips Article

Par2: Large integers (64 bit) in GetDiskFreeSpaceEx API call
2002-04-01 -- Paul van Drunick

In WinApi.CLW:


LARGEINTEGER    GROUP,TYPE
dwLowPart        long
dwHighPart       long
                END


! You have to create a kernel32.lib with this api in it (with libmaker and kernel32.dll)
! and add it to your project. This api is not in the clarion libs and
! only compatible with Win 95-OSR2/98/NT 4.0/2000/XP

MODULE('KERNEL32.DLL')

GetDiskFreeSpaceEx(*LPCSTR,*LARGEINTEGER,*LARGEINTEGER,*LARGEINTEGER),BOOL,PASCAL,RAW,NAME('GetDiskFreeSpaceExA')
END


Code for your function or method:

SomeFunction PROCEDURE

lintFreeBytesCaller   group(LARGEINTEGER)
                      end

lintTotalBytes        group(LARGEINTEGER)
                      end

lintFreeBytes         group(LARGEINTEGER)
                      end

decFreeBytesLow       DECIMAL(31) ! max decimal is not enough for
! max result of
! 3,3161584934796709483252973253515e+327

decFreeBytesHigh      DECIMAL(31) ! but is enough for this purpose
                                                           ! maybe someone knows an
alternative?
decFreeBytes             DECIMAL(31)
cstrPath                       CSTRING(MAX_PATH)

  CODE

  cstrPath = clip(SomePath)
  if GetDiskFreeSpaceEx(cstrPath, lintFreeBytesCaller, lintTotalBytes,lintFreeBytes) then
.
! you can also use lintFreeBytesCaller (users free space in this path)

  if lintFreeBytes.dwLowPart < 0
    decFreeBytesLow = 2 ^ 32 + lintFreeBytes.dwLowPart
  else
    decFreeBytesLow = lintFreeBytes.dwLowPart
  end

  if lintFreeBytes.dwHighPart < 0
    decFreeBytesHigh = 2 ^ 32 + lintFreeBytes.dwHighPart
  else
    decFreeBytesHigh = lintFreeBytes.dwHighPart
  end

  decFreeBytes = decFreeBytesLow + decFreeBytesHigh * 2 ^ 32

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