1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
\ miscelleneous words
\ Copyright (C) 1996,1997,1998 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., 675 Mass Ave, Cambridge, MA 02139, USA.
' 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
2over 2over d> IF 2swap THEN 2drop ;
: dmax ( d1 d2 -- d ) \ double
2over 2over d< IF 2swap THEN 2drop ;
\ shell commands
0 Value $? ( -- n ) \ gforth dollar-question
\G 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
\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< ;
|
