1: \ miscelleneous words
2:
3: \ Copyright (C) 1996,1997,1998 Free Software Foundation, Inc.
4:
5: \ This file is part of Gforth.
6:
7: \ Gforth is free software; you can redistribute it and/or
8: \ modify it under the terms of the GNU General Public License
9: \ as published by the Free Software Foundation; either version 2
10: \ of the License, or (at your option) any later version.
11:
12: \ This program is distributed in the hope that it will be useful,
13: \ but WITHOUT ANY WARRANTY; without even the implied warranty of
14: \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15: \ GNU General Public License for more details.
16:
17: \ You should have received a copy of the GNU General Public License
18: \ along with this program; if not, write to the Free Software
19: \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20:
21:
22: ' require alias needs ( ... "name" -- ... ) \ gforth
23: \G An alias for @code{require}; exists on other systems (e.g., Win32Forth).
24: \ needs is an F-PC name. we will probably switch to 'needs' in the future
25:
26: \ a little more compiler security
27:
28: \ currently not used by Gforth, but maybe by add-ons e.g., the 486asm
29: AUser CSP
30:
31: : !CSP ( -- )
32: sp@ csp ! ;
33:
34: : ?CSP ( -- )
35: sp@ csp @ <> -22 and throw ;
36:
37: \ DMIN and DMAX
38:
39: : dmin ( d1 d2 -- d ) \ double
40: 2over 2over d> IF 2swap THEN 2drop ;
41:
42: : dmax ( d1 d2 -- d ) \ double
43: 2over 2over d< IF 2swap THEN 2drop ;
44:
45: \ shell commands
46:
47: 0 Value $? ( -- n ) \ gforth dollar-question
48: \G @code{Value} -- the exit status returned by the most recently executed
49: \G @code{system} command.
50:
51: : system ( addr u -- ) \ gforth
52: \G Pass the string specified by @var{c-addr, u} to the host operating system
53: \G for execution in a sub-shell.
54: (system) throw TO $? ;
55:
56: : sh ( "..." -- ) \ gforth
57: \G Parse a string and use @code{system} to pass it to the host
58: \G operating system for execution in a sub-shell.
59: '# parse cr system ;
60:
61: \ stuff
62:
63: : ]L ( compilation: n -- ; run-time: -- n ) \ gforth
64: \G equivalent to @code{] literal}
65: ] postpone literal ;
66:
67: : in-dictionary? ( x -- f )
68: forthstart dictionary-end within ;
69:
70: : in-return-stack? ( addr -- f )
71: rp0 @ swap - [ forthstart 6 cells + ]L @ u< ;
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