File:  [gforth] / gforth / Attic / args.fs
Revision 1.3: download - view: text, annotated - select for diffs
Wed Mar 19 18:27:10 1997 UTC (25 years, 3 months ago) by anton
Branches: MAIN
CVS tags: v0-3-0, HEAD
fixed some documentation bugs
updated dates on copyright messages
updated NEWS
some fixes in Makefile.in

    1: \ argument expansion
    2: 
    3: \ Copyright (C) 1995-1997 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:     cells argv @ + @ cstring>sstring ;
   25: : #!       postpone \ ;  immediate
   26: 
   27: Create pathstring 2 cells allot \ string
   28: Create pathdirs   2 cells allot \ dir string array, pointer and count
   29: Variable argv
   30: Variable argc
   31: 
   32: 0 Value script? ( -- flag )
   33: 
   34: : process-path ( addr1 u1 -- addr2 u2 )
   35:     \ addr1 u1 is a path string, addr2 u2 is an array of dir strings
   36:     align here >r
   37:     BEGIN
   38: 	over >r 0 scan
   39: 	over r> tuck - ( rest-str this-str )
   40: 	dup
   41: 	IF
   42: 	    2dup 1- chars + c@ [char] / <>
   43: 	    IF
   44: 		2dup chars + [char] / swap c!
   45: 		1+
   46: 	    THEN
   47: 	    2,
   48: 	ELSE
   49: 	    2drop
   50: 	THEN
   51: 	dup
   52:     WHILE
   53: 	1 /string
   54:     REPEAT
   55:     2drop
   56:     here r> tuck - 2 cells / ;
   57: 
   58: : do-option ( addr1 len1 addr2 len2 -- n )
   59:     2swap
   60:     2dup s" -e"         compare  0= >r
   61:     2dup s" --evaluate" compare  0= r> or
   62:     IF  2drop dup >r ['] evaluate catch
   63: 	?dup IF  dup >r DoError r> negate (bye)  THEN
   64: 	r> >tib +!  2 EXIT  THEN
   65:     ." Unknown option: " type cr 2drop 1 ;
   66: 
   67: : process-args ( -- )
   68:     true to script?
   69:     >tib @ >r
   70:     argc @ 1
   71:     ?DO
   72: 	I arg over c@ [char] - <>
   73: 	IF
   74: 	    required 1
   75: 	ELSE
   76: 	    I 1+ argc @ =  IF  s" "  ELSE  I 1+ arg  THEN
   77: 	    do-option
   78: 	THEN
   79:     +LOOP
   80:     r> >tib !
   81:     false to script?
   82: ;
   83: 

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