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Diff for /gforth/kernel/args.fs between versions 1.17 and 1.18

version 1.17, 2004/01/16 21:27:31 version 1.18, 2004/01/18 22:00:21
Line 20 Line 20
   
 : cstring>sstring  ( cstring -- addr n ) \ gforth       cstring-to-sstring  : cstring>sstring  ( cstring -- addr n ) \ gforth       cstring-to-sstring
     -1 0 scan 0 swap 1+ /string ;      -1 0 scan 0 swap 1+ /string ;
 : arg ( n -- addr count ) \ gforth  
     \g Return the string for the @i{n}th command-line argument.  : arg ( u -- addr count ) \ gforth
     cells argv @ + @ cstring>sstring ;  \g Return the string for the @i{u}th command-line argument; returns
   \g @code{0 0} if the access is beyond the last argument.
       dup argc @ u< if
           cells argv @ + @ cstring>sstring
       else
           drop 0 0
       endif ;
   
 : #! ( -- ) \ gforth   hash-bang  : #! ( -- ) \ gforth   hash-bang
     \g An alias for @code{\}      \g An alias for @code{\}
     postpone \ ;  immediate      postpone \ ;  immediate
Line 34  Variable argv ( -- addr ) \ gforth Line 41  Variable argv ( -- addr ) \ gforth
 \g @code{Variable} -- a pointer to a vector of pointers to the command-line  \g @code{Variable} -- a pointer to a vector of pointers to the command-line
 \g arguments (including the command-name). Each argument is  \g arguments (including the command-name). Each argument is
 \g represented as a C-style string.  \g represented as a C-style string.
       
 Variable argc ( -- addr ) \ gforth  Variable argc ( -- addr ) \ gforth
 \g @code{Variable} -- the number of command-line arguments (including the command name).  \g @code{Variable} -- the number of command-line arguments (including the command name).
   
 0 Value arg# ( -- addr ) \ gforth  
 \g While processing the OS command line arguments, this points to the  
 \g argument counter (otherwise @code{arg#} produces 0); @code{arg# @  
 \g arg} produces the current argument, @code{1 arg# +!} will result in  
 \g one argument being skipped, and @code{argc @ 1- arg# !} will skip  
 \g all further arguments.  Don't increase @code{arg# @} above  
 \g @code{argc @ 1-} (undefined behaviour)!  
           
 0 Value script? ( -- flag )  0 Value script? ( -- flag )
       
   : shift-args ( -- ) \ gforth
   \g @code{1 arg} is deleted, shifting all following OS command line
   \g parameters to the left by 1, and reducing @code{argc @}.  This word
   \g can change @code{argv @}.
       argc @ 1 > if
           argv @ @ ( arg0 )
           -1 argc +!
           cell argv +!
           argv @ !
       endif ;
   
 : do-option ( addr1 len1 addr2 len2 -- n )  : process-option ( addr u -- )
     2swap      \ process option, possibly consuming further arguments
     2dup s" -e"         str= >r      2dup s" -e"         str= >r
     2dup s" --evaluate" str= r> or      2dup s" --evaluate" str= r> or if
     IF  2drop ( dup >r ) evaluate          2drop 1 arg shift-args evaluate exit endif
         ( r> >tib +! )  2 EXIT  THEN  
     2dup s" -h"         str= >r      2dup s" -h"         str= >r
     2dup s" --help"     str= r> or      2dup s" --help"     str= r> or if
     IF  ." Image Options:" cr          ." Image Options:" cr
         ."   FILE                                   load FILE (with `require')" cr          ."   FILE                                   load FILE (with `require')" cr
         ."   -e STRING, --evaluate STRING      interpret STRING (with `EVALUATE')" cr          ."   -e STRING, --evaluate STRING      interpret STRING (with `EVALUATE')" cr
         ." Report bugs on <https://savannah.gnu.org/bugs/?func=addbug&group=gforth>" cr          ." Report bugs on <https://savannah.gnu.org/bugs/?func=addbug&group=gforth>" cr
         bye          bye
     THEN      THEN
     ." Unknown option: " type cr 2drop 1 ;      ." Unknown option: " type cr ;
   
 : (process-args) ( -- )  : (process-args) ( -- )
     true to script?      true to script?
 \    >tib @ >r #tib @ >r >in @ >r      BEGIN
     argc @ 1          argc @ 1 > WHILE
     ?DO              1 arg shift-args over c@ [char] - <> IF
         rp@ to arg#                  required
         I arg over c@ [char] - <>              else
         IF                  process-option
 \           2dup dup #tib ! >in ! >tib !              then
             required 1      repeat
         ELSE      false to script? ;
             I 1+ argc @ =  IF  s" "  ELSE  I 1+ arg  THEN  
             do-option  
         THEN  
     +LOOP  
 \    r> >in ! r> #tib ! r> >tib !  
     0 to arg#  
     false to script?  
 ;  
   
 : os-boot ( path n **argv argc -- )  : os-boot ( path n **argv argc -- )
     stdout TO outfile-id      stdout TO outfile-id
Removed from v.1.17  
changed lines
  Added in v.1.18

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