--- gforth/stuff.fs 1999/11/08 22:01:09 1.12 +++ gforth/stuff.fs 2003/01/22 18:52:47 1.25 @@ -1,6 +1,6 @@ \ miscelleneous words -\ Copyright (C) 1996,1997,1998 Free Software Foundation, Inc. +\ Copyright (C) 1996,1997,1998,2000 Free Software Foundation, Inc. \ This file is part of Gforth. @@ -16,8 +16,9 @@ \ 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. +require glocals.fs ' require alias needs ( ... "name" -- ... ) \ gforth \G An alias for @code{require}; exists on other systems (e.g., Win32Forth). @@ -36,10 +37,11 @@ AUser CSP \ DMIN and DMAX -: dmin ( d1 d2 -- d ) \ double +: dmin ( d1 d2 -- d ) \ double d-min 2over 2over d> IF 2swap THEN 2drop ; -: dmax ( d1 d2 -- d ) \ double + +: dmax ( d1 d2 -- d ) \ double d-max 2over 2over d< IF 2swap THEN 2drop ; \ shell commands @@ -48,8 +50,8 @@ AUser CSP \G @code{Value} -- the exit status returned by the most recently executed \G @code{system} command. -: system ( addr u -- ) \ gforth -\G Pass the string specified by @var{c-addr, u} to the host operating system +: system ( c-addr u -- ) \ gforth +\G Pass the string specified by @var{c-addr u} to the host operating system \G for execution in a sub-shell. (system) throw TO $? ; @@ -64,8 +66,101 @@ AUser CSP \G equivalent to @code{] literal} ] postpone literal ; +[ifundef] in-dictionary? : in-dictionary? ( x -- f ) forthstart dictionary-end within ; +[endif] : in-return-stack? ( addr -- f ) rp0 @ swap - [ forthstart 6 cells + ]L @ u< ; + +\ const-does> + +: compile-literals ( w*u u -- ; run-time: -- w*u ) recursive + \ compile u literals, starting with the bottommost one + ?dup-if + swap >r 1- compile-literals + r> POSTPONE literal + endif ; + +: compile-fliterals ( r*u u -- ; run-time: -- w*u ) recursive + \ compile u fliterals, starting with the bottommost one + ?dup-if + { F: r } 1- compile-fliterals + r POSTPONE fliteral + endif ; + +: (const-does>) ( w*uw r*ur uw ur target "name" -- ) + \ define a colon definition "name" containing w*uw r*ur as + \ literals and a call to target. + { uw ur target } + header docol: cfa, \ start colon def without stack junk + ur compile-fliterals uw compile-literals + target compile, POSTPONE exit reveal ; + +: const-does> ( run-time: w*uw r*ur uw ur "name" -- ) + \G Defines @var{name} and returns.@sp 0 + \G @var{name} execution: pushes @var{w*uw r*ur}, then performs the + \G code following the @code{const-does>}. + here >r 0 POSTPONE literal + POSTPONE (const-does>) + POSTPONE ; + noname : POSTPONE rdrop + lastxt r> cell+ ! \ patch the literal +; immediate + +\ !! rewrite slurp-file using slurp-fid +: slurp-file ( c-addr1 u1 -- c-addr2 u2 ) + \G @var{c-addr1 u1} is the filename, @var{c-addr2 u2} is the file's contents + r/o bin open-file throw >r + r@ file-size throw abort" file too large" + dup allocate throw swap + 2dup r@ read-file throw over <> abort" could not read whole file" + r> close-file throw ; + +: slurp-fid { fid -- addr u } + \G @var{addr u} is the content of the file @var{fid} + 0 0 begin ( awhole uwhole ) + dup 1024 + dup >r extend-mem ( anew awhole uwhole R: unew ) + rot r@ fid read-file throw ( awhole uwhole uread R: unew ) + r> 2dup = + while ( awhole uwhole uread unew ) + 2drop + repeat + - + dup >r resize throw r> ; + +\ ]] ... [[ + +: compile-literal ( n -- ) + postpone literal ; + +: [[ ( -- ) +\G switch from postpone state to compile state + \ this is only a marker; it is never really interpreted + compile-only-error ; immediate + +: postponer ( c-addr u -- ) + 2dup find-name dup if ( c-addr u nt ) + nip nip name>comp + 2dup [comp'] [[ d= if + 2drop ['] compiler is parser + else + postpone, + endif + else + drop + 2dup snumber? dup if + 0> IF + swap postpone literal postpone compile-literal + THEN + postpone Literal postpone compile-literal + 2drop + ELSE + drop no.extensions + THEN + then ; + +: ]] ( -- ) + \ switch into postpone state + ['] postponer is parser state on ; immediate restrict +