File:  [gforth] / gforth / wordinfo.fs
Revision 1.6: download - view: text, annotated - select for diffs
Tue Nov 29 16:22:51 1994 UTC (25 years ago) by pazsan
Branches: MAIN
CVS tags: HEAD
* added configure mode for DOS-Makefile:
  configure -target=i386-<anythinh>-msdos<anyversion>
  creates Makefile for DOS.
* checked in some mminor changes which never were checked in.
* added special startup file for DOS

    1: \ WORDINFO.FS  V1.0                                    17may93jaw
    2: 
    3: \ May be cross-compiled
    4: \ If you want check values then exclude comments,
    5: \ but keep in mind that this can't be cross-compiled
    6: 
    7: INCLUDE look.fs
    8: 
    9: \ Wordinfo is a tool that checks a nfa
   10: \ and finds out what wordtype we have
   11: \ it is used in SEE.FS
   12: 
   13: : alias? ( nfa -- flag )
   14:         dup name> look
   15:         0= ABORT" WINFO: CFA not found"
   16: \       cell+
   17:         2dup <>
   18:         IF   nip dup 1 cells - here !
   19:              count $1f and here cell+ place true
   20:         ELSE 2drop false THEN ;
   21: 
   22: : var?  ( nfa -- flag )
   23:         cell+ (name>)
   24:         >code-address ['] udp >code-address = ;
   25: 
   26: : con?  ( nfa -- flag )
   27:         cell+ (name>)
   28:         >code-address ['] bl >code-address = ;
   29: 
   30: : user?  ( nfa -- flag )
   31:         cell+ (name>)
   32:         >code-address ['] s0 >code-address = ;
   33: 
   34: : does? ( nfa -- flag )
   35:         cell+ (name>)
   36:         >code-address ['] bits >code-address = ;
   37: 
   38: : defered? ( nfa -- flag )
   39:         cell+ (name>)
   40:         >code-address ['] source >code-address = ;
   41: 
   42: : colon? ( nfa -- flag )
   43:         cell+ (name>)
   44:         >code-address ['] does? >code-address = ;
   45: 
   46: \ VALUE VCheck
   47: 
   48: \ : value? ( nfa -- flag )
   49: \         dup does?
   50: \         IF here @ ['] VCheck cell+ @ =
   51: \            dup IF swap (name>) >body @ here ! ELSE nip THEN
   52: \         ELSE drop false THEN ;
   53: 
   54: : prim? ( nfa -- flag )
   55:         name>
   56:         forthstart u< ;
   57: 
   58: \ None nestable IDs:
   59: 
   60: 1 CONSTANT Pri#         \ Primitives
   61: 2 CONSTANT Con#         \ Constants
   62: 3 CONSTANT Var#         \ Variables
   63: 4 CONSTANT Val#         \ Values
   64: 
   65: \ Nestabe IDs:
   66: 
   67: 5 CONSTANT Doe#         \ Does part
   68: 6 CONSTANT Def#         \ Defer
   69: 7 CONSTANT Col#         \ Colon def
   70: 8 CONSTANT Use#         \ User variable
   71: 
   72: \ Nobody knows:
   73: 
   74: 9 CONSTANT Ali#         \ Alias
   75: 
   76: 10 CONSTANT Str#         \ Structure words
   77: 
   78: 11 CONSTANT Com#        \ Compiler directives : ; POSTPONE
   79: 
   80: CREATE InfoTable
   81:         ' Prim?    A, Pri# ,
   82:         ' Alias?   A, Ali# ,
   83:         ' Con?     A, Con# ,
   84:         ' Var?     A, Var# ,
   85: \        ' Value?  A, Val# ,
   86:         ' Defered? A, Def# ,
   87:         ' Does?    A, Doe# ,
   88:         ' Colon?   A, Col# ,
   89: 	' User?    A, Use# ,
   90:         0 ,
   91: 
   92: : WordInfo ( nfa --- code )
   93:         InfoTable
   94:         BEGIN  dup @ dup
   95:         WHILE  swap 2 cells + swap
   96:                2 pick swap execute
   97:         UNTIL
   98:         1 cells - @ nip
   99:         ELSE
  100:         2drop drop 0
  101:         THEN ;
  102: 

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