File:  [gforth] / gforth / kernel / args.fs
Revision 1.4: download - view: text, annotated - select for diffs
Tue Dec 8 22:03:08 1998 UTC (23 years, 9 months ago) by anton
Branches: MAIN
CVS tags: v0-4-0, HEAD
updated dates in copyright messages
inserted copyright messages in most files that did not have them
removed outdated files engine/32bit.h engine/strsig.c

    1: \ argument expansion
    2: 
    3: \ Copyright (C) 1995,1996,1997,1998 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: : cstring>sstring  ( cstring -- addr n ) \ gforth	cstring-to-sstring
   22:     -1 0 scan 0 swap 1+ /string ;
   23: : arg ( n -- addr count ) \ gforth
   24:     \g returns the string for the @var{n}th command-line argument.
   25:     cells argv @ + @ cstring>sstring ;
   26: : #! ( -- ) \ gforth   hash-bang
   27:     \g an alias for @code{\}
   28:     postpone \ ;  immediate
   29: 
   30: Create pathstring 2 cells allot \ string
   31: Create pathdirs   2 cells allot \ dir string array, pointer and count
   32: Variable argv ( -- addr ) \ gforth
   33: \g contains a pointer to a vector of pointers to the command-line
   34: \g arguments (including the command-name). Each argument is
   35: \g represented as a C-style string.
   36: Variable argc ( -- addr ) \ gforth
   37: \g contains the number of command-line arguments (including the command name)
   38: 
   39: 0 Value script? ( -- flag )
   40: 
   41: : do-option ( addr1 len1 addr2 len2 -- n )
   42:     2swap
   43:     2dup s" -e"         compare  0= >r
   44:     2dup s" --evaluate" compare  0= r> or
   45:     IF  2drop dup >r evaluate
   46: 	r> >tib +!  2 EXIT  THEN
   47:     2dup s" -h"         compare  0= >r
   48:     2dup s" --help"     compare  0= r> or
   49:     IF  ." Image Options:" cr
   50: 	."   FILE				    load FILE (with `require')" cr
   51: 	."   -e STRING, --evaluate STRING      interpret STRING (with `EVALUATE')" cr
   52: 	." Report bugs to <bug-gforth@gnu.ai.mit.edu>" cr
   53: 	bye
   54:     THEN
   55:     ." Unknown option: " type cr 2drop 1 ;
   56: 
   57: : (process-args) ( -- )
   58:     true to script?
   59:     >tib @ >r #tib @ >r >in @ >r
   60:     argc @ 1
   61:     ?DO
   62: 	I arg over c@ [char] - <>
   63: 	IF
   64: 	    2dup dup #tib ! >in ! >tib !
   65: 	    required 1
   66: 	ELSE
   67: 	    I 1+ argc @ =  IF  s" "  ELSE  I 1+ arg  THEN
   68: 	    do-option
   69: 	THEN
   70:     +LOOP
   71:     r> >in ! r> #tib ! r> >tib !
   72:     false to script?
   73: ;
   74: 
   75: ' (process-args) IS process-args

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