--- gforth/search.fs 2000/08/16 09:26:52 1.15 +++ gforth/search.fs 2002/01/05 17:42:30 1.19 @@ -1,6 +1,6 @@ \ search order wordset 14may93py -\ Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc. +\ Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc. \ This file is part of Gforth. @@ -16,12 +16,15 @@ \ You should have received a copy of the GNU General Public License \ along with this program; if not, write to the Free Software -\ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +\ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. -$10 constant maxvp -Variable vp - 0 A, 0 A, 0 A, 0 A, 0 A, 0 A, 0 A, 0 A, +$10 value maxvp \ current size of search order stack +$400 constant maxvp-limit \ upper limit for resizing search order stack +Variable static-vp 0 A, 0 A, 0 A, 0 A, 0 A, 0 A, 0 A, 0 A, + 0 A, 0 A, 0 A, 0 A, 0 A, 0 A, 0 A, 0 A, +0 Value vp +static-vp ' vp >body A! : get-current ( -- wid ) \ search \G @i{wid} is the identifier of the current compilation word list. @@ -71,9 +74,24 @@ Variable slowvoc 0 slowvoc ! Create wordlist drop DOES> context ! ; : check-maxvp ( n -- ) - maxvp > -49 and throw ; + dup maxvp-limit > -49 and throw + dup maxvp > IF + vp static-vp = -49 and throw + BEGIN dup maxvp 2* dup TO maxvp > 0= UNTIL + vp maxvp 1+ cells resize throw TO vp + THEN drop ; + +: init-vp ( n -- ) + $10 TO maxvp + maxvp 1+ cells allocate throw TO vp + static-vp dup @ 1+ cells vp swap move ; + +:noname + DEFERS 'cold + init-vp ; +IS 'cold -: push-order ( wid -- ) \ gforth +: >order ( wid -- ) \ gforth to-order \g Push @var{wid} on the search order. vp @ 1+ dup check-maxvp vp! context ! ; @@ -81,7 +99,7 @@ Variable slowvoc 0 slowvoc ! \G Like @code{DUP} for the search order. Usually used before a \G vocabulary (e.g., @code{also Forth}); the combined effect is to push \G the wordlist represented by the vocabulary on the search order. - context @ push-order ; + context @ >order ; : previous ( -- ) \ search-ext \G Drop the wordlist at the top of the search order.