rom/dos/setfilesize.c

   1 /*
   2     Copyright © 1995-2007, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Change the size of a file.
   6     Lang: english
   7 */
   8 #include <proto/exec.h>
   9 #include <dos/dosextens.h>
  10 #include "dos_intern.h"
  11
  12 /*****************************************************************************
  13
  14     NAME */
  15 #include <proto/dos.h>
  16
  17         AROS_LH3(LONG, SetFileSize,
  18
  19 /*  SYNOPSIS */
  20         AROS_LHA(BPTR, file,   D1),
  21         AROS_LHA(LONG, offset, D2),
  22         AROS_LHA(LONG, mode,   D3),
  23
  24 /*  LOCATION */
  25         struct DosLibrary *, DOSBase, 76, Dos)
  26
  27 /*  FUNCTION
  28         Change the size of a file.
  29
  30     INPUTS
  31         file   - filehandle
  32         offset - relative size
  33         mode   - OFFSET_BEGINNING, OFFSET_CURRENT or OFFSET_END
  34
  35     RESULT
  36         New size of the file or -1 in case of an error.
  37         IoErr() gives additional information in that case.
  38
  39     NOTES
  40
  41     EXAMPLE
  42
  43     BUGS
  44
  45     SEE ALSO
  46
  47     INTERNALS
  48
  49 *****************************************************************************/
  50 {
  51     AROS_LIBFUNC_INIT
  52
  53     /* Get pointer to filehandle */
  54     struct FileHandle *fh = BADDR(file);
  55     LONG status;
  56
  57     status = dopacket3(DOSBase, NULL, fh->fh_Type, ACTION_SET_FILE_SIZE, fh->fh_Arg1, offset, mode);
  58
  59     return status;
  60
  61     AROS_LIBFUNC_EXIT
  62 } /* SetFileSize */