\ miscelleneous words
\ Copyright (C) 1996,1997,1998,2000 Free Software Foundation, Inc.
\ This file is part of Gforth.
\ Gforth is free software; you can redistribute it and/or
\ modify it under the terms of the GNU General Public License
\ as published by the Free Software Foundation; either version 2
\ of the License, or (at your option) any later version.
\ This program is distributed in the hope that it will be useful,
\ but WITHOUT ANY WARRANTY; without even the implied warranty of
\ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
\ GNU General Public License for more details.
\ 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., 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).
\ needs is an F-PC name. we will probably switch to 'needs' in the future
\ a little more compiler security
\ currently not used by Gforth, but maybe by add-ons e.g., the 486asm
AUser CSP
: !CSP ( -- )
sp@ csp ! ;
: ?CSP ( -- )
sp@ csp @ <> -22 and throw ;
\ DMIN and DMAX
: dmin ( d1 d2 -- d ) \ double d-min
2over 2over d> IF 2swap THEN 2drop ;
: dmax ( d1 d2 -- d ) \ double d-max
2over 2over d< IF 2swap THEN 2drop ;
\ shell commands
0 Value $? ( -- n ) \ gforth dollar-question
\G @code{Value} -- the exit status returned by the most recently executed
\G @code{system} command.
: 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 $? ;
: sh ( "..." -- ) \ gforth
\G Parse a string and use @code{system} to pass it to the host
\G operating system for execution in a sub-shell.
'# parse cr system ;
\ stuff
: ]L ( compilation: n -- ; run-time: -- n ) \ gforth
\G equivalent to @code{] literal}
] postpone literal ;
: in-dictionary? ( x -- f )
forthstart dictionary-end within ;
: 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> ;
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