Annotation of gforth/kernel/args.fs, revision 1.4

1.1       anton       1: \ argument expansion
                      2: 
1.4     ! anton       3: \ Copyright (C) 1995,1996,1997,1998 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: 
                     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
1.3       pazsan     45:     IF  2drop dup >r evaluate
1.1       anton      46:        r> >tib +!  2 EXIT  THEN
1.3       pazsan     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
1.1       anton      55:     ." Unknown option: " type cr 2drop 1 ;
                     56: 
1.2       jwilke     57: : (process-args) ( -- )
1.1       anton      58:     true to script?
1.3       pazsan     59:     >tib @ >r #tib @ >r >in @ >r
1.1       anton      60:     argc @ 1
                     61:     ?DO
                     62:        I arg over c@ [char] - <>
                     63:        IF
1.3       pazsan     64:            2dup dup #tib ! >in ! >tib !
1.1       anton      65:            required 1
                     66:        ELSE
                     67:            I 1+ argc @ =  IF  s" "  ELSE  I 1+ arg  THEN
                     68:            do-option
                     69:        THEN
                     70:     +LOOP
1.3       pazsan     71:     r> >in ! r> #tib ! r> >tib !
1.1       anton      72:     false to script?
                     73: ;
                     74: 
1.2       jwilke     75: ' (process-args) IS process-args

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