rom/dos/internalflush.c

   1 /*
   2     Copyright © 2002-2007, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 #undef  SDEBUG
   7 #undef  DEBUG
   8 #define DEBUG  0
   9
  10 #include <exec/types.h>
  11 #include <proto/dos.h>
  12 #include <aros/debug.h>
  13
  14 #include "dos_intern.h"
  15
  16 LONG InternalFlush( struct FileHandle *fh, struct DosLibrary *DOSBase )
  17 {
  18     UBYTE *position;
  19
  20     /* Make sure the input parameters are sane. */
  21     ASSERT_VALID_PTR( fh );
  22     ASSERT_VALID_PTR( fh->fh_Buf );
  23     ASSERT_VALID_PTR( fh->fh_Pos );
  24     ASSERT_VALID_PTR( fh->fh_End );
  25
  26     ASSERT(fh->fh_End >  fh->fh_Buf);
  27     ASSERT(fh->fh_Pos >= fh->fh_Buf);
  28     ASSERT(fh->fh_Pos <= fh->fh_End );
  29
  30     /* Write the data, in many pieces if the first one isn't enough. */
  31     position = fh->fh_Buf;
  32
  33     while( position < fh->fh_Pos )
  34     {
  35         LONG size;
  36
  37         size = Write( MKBADDR(fh), position, fh->fh_Pos - position );
  38
  39         /* An error happened? No success. */
  40         if( size < 0 )
  41         {
  42             fh->fh_Flags &= ~FHF_WRITE;
  43
  44             return FALSE;
  45         }
  46
  47         position += size;
  48     }
  49
  50     /* Reset the buffer. */
  51     fh->fh_Pos = fh->fh_Buf;
  52
  53     return TRUE;
  54 }