Annotation of gforth/stuff.fs, revision 1.12

1.1       anton       1: \ miscelleneous words
                      2: 
1.7       anton       3: \ Copyright (C) 1996,1997,1998 Free Software Foundation, Inc.
1.1       anton       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: 
1.8       anton      21: 
1.6       anton      22: ' require alias needs ( ... "name" -- ... ) \ gforth
1.11      crook      23: \G An alias for @code{require}; exists on other systems (e.g., Win32Forth).
1.1       anton      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 ;
1.2       anton      36: 
1.4       anton      37: \ DMIN and DMAX
                     38: 
1.2       anton      39: : dmin ( d1 d2 -- d ) \ double
1.5       pazsan     40:     2over 2over d> IF  2swap  THEN 2drop ;
1.2       anton      41: 
                     42: : dmax ( d1 d2 -- d ) \ double
1.5       pazsan     43:     2over 2over d< IF  2swap  THEN 2drop ;
1.4       anton      44: 
                     45: \ shell commands
                     46: 
1.10      crook      47: 0 Value $? ( -- n ) \ gforth dollar-question
1.12    ! crook      48: \G @code{Value} -- the exit status returned by the most recently executed
1.9       crook      49: \G @code{system} command.
1.4       anton      50: 
                     51: : system ( addr u -- ) \ gforth
1.11      crook      52: \G Pass the string specified by @var{c-addr, u} to the host operating system
1.9       crook      53: \G for execution in a sub-shell.
1.4       anton      54:     (system) throw TO $? ;
1.9       crook      55: 
1.4       anton      56: : sh ( "..." -- ) \ gforth
1.9       crook      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.
1.4       anton      59:     '# parse cr system ;
                     60: 
1.8       anton      61: \ stuff
                     62: 
1.10      crook      63: : ]L ( compilation: n -- ; run-time: -- n ) \ gforth
                     64:     \G equivalent to @code{] literal}
1.8       anton      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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