xref: /freebsd-11.0-release/sys/boot/ficl/softwords/ficlclass.fr

\ #if (FICL_WANT_OOP)
\ ** ficl/softwords/ficlclass.fr
\ Classes to model ficl data structures in objects
\ This is a demo!
\ John Sadler 14 Sep 1998
\
\ ** C - W O R D
\ Models a FICL_WORD
\
\ $FreeBSD: releng/11.0/sys/boot/ficl/softwords/ficlclass.fr 94290 2002-04-09 17:45:28Z dcs $

object subclass c-word
    c-word     ref: .link
    c-2byte    obj: .hashcode
    c-byte     obj: .flags
    c-byte     obj: .nName
    c-bytePtr  obj: .pName
    c-cellPtr  obj: .pCode
    c-4byte    obj: .param0

    \ Push word's name...
    : get-name   ( inst class -- c-addr u )
        2dup
        my=[ .pName get-ptr ] -rot
        my=[ .nName get ]
    ;

    : next   ( inst class -- link-inst class )
        my=> .link ;
        
    : ?
        ." c-word: " 
        2dup --> get-name type cr
    ;

end-class

\ ** C - W O R D L I S T
\ Models a FICL_HASH
\ Example of use:
\ get-current c-wordlist --> ref current
\ current --> ?
\ current --> .hash --> ?
\ current --> .hash --> next --> ?

object subclass c-wordlist
    c-wordlist ref: .parent
    c-ptr      obj: .name
    c-cell     obj: .size
    c-word     ref: .hash   ( first entry in hash table )

    : ?
        --> get-name ." ficl wordlist "  type cr ;
    : push  drop  >search ;
    : pop   2drop previous ;
    : set-current   drop set-current ;
    : get-name   drop wid-get-name ;
    : words   { 2:this -- }
        this my=[ .size get ] 0 do 
            i this my=[ .hash index ]  ( 2list-head )
            begin
                2dup --> get-name type space
                --> next over
            0= until 2drop cr
        loop
    ;
end-class

\ : named-wid  wordlist postpone c-wordlist  metaclass => ref ;


\ ** C - F I C L S T A C K
object subclass c-ficlstack
    c-4byte    obj: .nCells
    c-cellPtr  obj: .link
    c-cellPtr  obj: .sp
    c-4byte    obj: .stackBase

    : init   2drop ;
    : ?      2drop
        ." ficl stack " cr ;
    : top
        --> .sp --> .addr --> prev --> get ;
end-class

\ #endif