rom/dos/internalflush.c

   1 /*
   2     Copyright © 2002, 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     AROS_LIBBASE_EXT_DECL( struct DosLibrary *, DOSBase )
  19
  20     UBYTE *position;
  21
  22     /* Make sure the input parameters are sane. */
  23     ASSERT_VALID_PTR( fh );
  24     ASSERT_VALID_PTR( fh->fh_Buf );
  25     ASSERT_VALID_PTR( fh->fh_Pos );
  26     ASSERT_VALID_PTR( fh->fh_End );
  27
  28     ASSERT(fh->fh_End >  fh->fh_Buf);
  29     ASSERT(fh->fh_Pos >= fh->fh_Buf);
  30     ASSERT(fh->fh_Pos <= fh->fh_End );
  31
  32     /* Write the data, in many pieces if the first one isn't enough. */
  33     position = fh->fh_Buf;
  34
  35     while( position < fh->fh_Pos )
  36     {
  37         LONG size;
  38
  39         size = Write( MKBADDR(fh), position, fh->fh_Pos - position );
  40
  41         /* An error happened? No success. */
  42         if( size < 0 )
  43         {
  44             fh->fh_Flags &= ~FHF_WRITE;
  45
  46             return FALSE;
  47         }
  48
  49         position += size;
  50     }
  51
  52     /* Reset the buffer. */
  53     fh->fh_Pos = fh->fh_Buf;
  54
  55     return TRUE;
  56 }