compiler/clib/__get_default_file.c

   1 /*
   2     Copyright © 1995-2008, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Function to get a dos.library file handle associated with given file
   6     descriptor.
   7 */
   8
   9 #include "__arosc_privdata.h"
  10 #include "__open.h"
  11
  12 /*****************************************************************************
  13
  14     NAME */
  15
  16         int __get_default_file (
  17
  18 /*  SYNOPSIS */
  19         int file_descriptor,
  20         long * file_handle)
  21
  22 /*  FUNCTION
  23         Gets dos.library file handle associated with a given file descriptor.
  24
  25     INPUTS
  26         file_descriptor - the File Descriptor you wish to obtain the associated
  27                 file handle for.
  28         file_handle - Pointer to store the associated file handle.
  29
  30     RESULT
  31         !=0 on error, 0 on success.
  32
  33     NOTES
  34     This function is not a part of the ISO C standard, it comes from clib2
  35     project and was implemented to make porting of abc-shell easier.
  36
  37     EXAMPLE
  38
  39     BUGS
  40
  41     SEE ALSO
  42
  43     INTERNALS
  44
  45 ******************************************************************************/
  46 {
  47         if(
  48                 file_descriptor < 0 ||
  49                 file_descriptor > __numslots ||
  50                 !__fd_array[file_descriptor]
  51         ) return -1;
  52         else
  53         {
  54                 *(BPTR*)file_handle = (BPTR) __fd_array[file_descriptor]->fcb->fh;
  55         }
  56         return 0;
  57 }