obp/obp/pkg/confvar/access.fth

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\ Hypervisor Software File: access.fth
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id: @(#)access.fth 1.4 03/10/28
purpose: option access words
copyright: Copyright 1998-2003 Sun Microsystems, Inc.  All Rights Reserved
copyright: Use is subject to license terms.

exported-headerless

: nvseek ( offset ihandle -- )
   >r 0 " seek" r> $call-method throw
;

: (nvtransfer) ( adr,len str,len ihandle -- )
   >r 2>r tuck 2r> r> $call-method <> throw
;

: nvread  ( adr len ihandle -- )  " read"  rot (nvtransfer)  ;
: nvwrite ( adr len ihandle -- )  " write" rot (nvtransfer)  ;

: nvsync ( ihandle -- )
   " sync" rot ['] $call-method catch  if 3drop then
;

: nvsize ( ihandle -- )  " size" rot $call-method ;

0     value     nvfixed-ihandle
      variable  nvfixed-lastpos

: nvfixed-open ( dev$ -- ok? )
   open-dev dup to nvfixed-ihandle  0 nvfixed-lastpos !
;

: nvfixed-read ( adr len -- )
   tuck  nvfixed-ihandle nvread  nvfixed-lastpos +!
;

: nvfixed-write ( adr len -- )
   tuck  nvfixed-ihandle nvwrite  nvfixed-lastpos +!
;

: nvfixed-seek ( offset -- )
   dup  nvfixed-ihandle nvseek  nvfixed-lastpos !
;

: nvfixed-sync  ( -- )       nvfixed-ihandle nvsync ;
: nvfixed-size  ( -- size )  nvfixed-ihandle nvsize ;
: nvfixed-ftell ( -- pos )   nvfixed-lastpos @ ;

: nvfixed-close ( -- )
   nvfixed-sync  nvfixed-ihandle close-dev
;

0     value     nvoption-ihandle
      variable  nvoption-lastpos

: nvoption-open ( dev$ -- ok? )
   open-dev dup to nvoption-ihandle  0 nvoption-lastpos !
;

: nvoption-read ( adr len -- )
   tuck  nvoption-ihandle nvread  nvoption-lastpos +!
;

: nvoption-write ( adr len -- )
   tuck  nvoption-ihandle nvwrite  nvoption-lastpos +!
;

: nvoption-seek ( offset -- )
   dup  nvoption-ihandle nvseek  nvoption-lastpos !
;

: nvoption-sync  ( -- )       nvoption-ihandle nvsync  ;
: nvoption-size  ( -- size )  nvoption-ihandle nvsize ;
: nvoption-ftell ( -- pos )   nvoption-lastpos @ ;

: nvoption-close ( -- )
   nvoption-sync  nvoption-ihandle close-dev
;

unexported-words