Annotation of gforth/kernel/args.fs, revision 1.12

1.1       anton       1: \ argument expansion
                      2: 
1.8       anton       3: \ Copyright (C) 1995,1996,1997,1998,2000 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
1.9       anton      19: \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
1.1       anton      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
1.6       crook      24:     \g Return the string for the @i{n}th command-line argument.
1.1       anton      25:     cells argv @ + @ cstring>sstring ;
                     26: : #! ( -- ) \ gforth   hash-bang
1.5       crook      27:     \g An alias for @code{\}
1.1       anton      28:     postpone \ ;  immediate
                     29: 
                     30: Create pathstring 2 cells allot \ string
                     31: Create pathdirs   2 cells allot \ dir string array, pointer and count
1.6       crook      32: 
1.1       anton      33: Variable argv ( -- addr ) \ gforth
1.6       crook      34: \g @code{Variable} -- a pointer to a vector of pointers to the command-line
1.1       anton      35: \g arguments (including the command-name). Each argument is
                     36: \g represented as a C-style string.
1.6       crook      37: 
1.1       anton      38: Variable argc ( -- addr ) \ gforth
1.6       crook      39: \g @code{Variable} -- the number of command-line arguments (including the command name).
1.1       anton      40: 
                     41: 0 Value script? ( -- flag )
                     42: 
                     43: : do-option ( addr1 len1 addr2 len2 -- n )
                     44:     2swap
1.12    ! anton      45:     2dup s" -e"         str= >r
        !            46:     2dup s" --evaluate" str= r> or
1.10      pazsan     47:     IF  2drop ( dup >r ) evaluate
                     48:        ( r> >tib +! )  2 EXIT  THEN
1.12    ! anton      49:     2dup s" -h"         str= >r
        !            50:     2dup s" --help"     str= r> or
1.3       pazsan     51:     IF  ." Image Options:" cr
                     52:        ."   FILE                                   load FILE (with `require')" cr
                     53:        ."   -e STRING, --evaluate STRING      interpret STRING (with `EVALUATE')" cr
1.7       anton      54:        ." Report bugs to <bug-gforth@gnu.org>" cr
1.3       pazsan     55:        bye
                     56:     THEN
1.1       anton      57:     ." Unknown option: " type cr 2drop 1 ;
                     58: 
1.2       jwilke     59: : (process-args) ( -- )
1.1       anton      60:     true to script?
1.10      pazsan     61: \    >tib @ >r #tib @ >r >in @ >r
1.1       anton      62:     argc @ 1
                     63:     ?DO
                     64:        I arg over c@ [char] - <>
                     65:        IF
1.10      pazsan     66: \          2dup dup #tib ! >in ! >tib !
1.1       anton      67:            required 1
                     68:        ELSE
                     69:            I 1+ argc @ =  IF  s" "  ELSE  I 1+ arg  THEN
                     70:            do-option
                     71:        THEN
                     72:     +LOOP
1.10      pazsan     73: \    r> >in ! r> #tib ! r> >tib !
1.1       anton      74:     false to script?
                     75: ;
                     76: 
1.11      pazsan     77: : os-boot ( path n **argv argc -- )
                     78:     stdout TO outfile-id
                     79:     stdin  TO infile-id
                     80:     argc ! argv ! pathstring 2! ;
                     81: 
1.2       jwilke     82: ' (process-args) IS process-args

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