File:  [gforth] / gforth / wordinfo.fs
Revision 1.7: download - view: text, annotated - select for diffs
Sat Oct 7 17:38:21 1995 UTC (26 years, 1 month ago) by anton
Branches: MAIN
CVS tags: HEAD
added code.fs (code, ;code, end-code, assembler)
renamed dostruc to dofield
made index and doc-entries nicer
Only words containing 'e' or 'E' are converted to FP numbers.
added many wordset comments
added flush-icache primitive and FLUSH_ICACHE macro
added +DO, U+DO, -DO, U-DO and -LOOP
added code address labels (`docol:' etc.)
fixed sparc cache_flush

    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>) >code-address dovar: = ;
   24: 
   25: : con?  ( nfa -- flag )
   26:     cell+ (name>) >code-address docon: = ;
   27: 
   28: : user?  ( nfa -- flag )
   29:     cell+ (name>) >code-address douser: = ;
   30: 
   31: : does? ( nfa -- flag )
   32:     \ !! does not work on all installations
   33:     cell+ (name>)
   34:     >code-address ['] bits >code-address = ;
   35: 
   36: : defered? ( nfa -- flag )
   37:     cell+ (name>) >code-address dodefer: = ;
   38: 
   39: : colon? ( nfa -- flag )
   40:     cell+ (name>) >code-address docol: = ;
   41: 
   42: \ the above words could be factored with create-does>, but this would
   43: \ probably make this file incompatible with cross.
   44: 
   45: \ VALUE VCheck
   46: 
   47: \ : value? ( nfa -- flag )
   48: \         dup does?
   49: \         IF here @ ['] VCheck cell+ @ =
   50: \            dup IF swap (name>) >body @ here ! ELSE nip THEN
   51: \         ELSE drop false THEN ;
   52: 
   53: : prim? ( nfa -- flag )
   54:         name>
   55:         forthstart u< ;
   56: 
   57: \ None nestable IDs:
   58: 
   59: 1 CONSTANT Pri#         \ Primitives
   60: 2 CONSTANT Con#         \ Constants
   61: 3 CONSTANT Var#         \ Variables
   62: 4 CONSTANT Val#         \ Values
   63: 
   64: \ Nestabe IDs:
   65: 
   66: 5 CONSTANT Doe#         \ Does part
   67: 6 CONSTANT Def#         \ Defer
   68: 7 CONSTANT Col#         \ Colon def
   69: 8 CONSTANT Use#         \ User variable
   70: 
   71: \ Nobody knows:
   72: 
   73: 9 CONSTANT Ali#         \ Alias
   74: 
   75: 10 CONSTANT Str#         \ Structure words
   76: 
   77: 11 CONSTANT Com#        \ Compiler directives : ; POSTPONE
   78: 
   79: CREATE InfoTable
   80:         ' Prim?    A, Pri# ,
   81:         ' Alias?   A, Ali# ,
   82:         ' Con?     A, Con# ,
   83:         ' Var?     A, Var# ,
   84: \        ' Value?  A, Val# ,
   85:         ' Defered? A, Def# ,
   86:         ' Does?    A, Doe# ,
   87:         ' Colon?   A, Col# ,
   88: 	' User?    A, Use# ,
   89:         0 ,
   90: 
   91: : WordInfo ( nfa --- code )
   92:         InfoTable
   93:         BEGIN  dup @ dup
   94:         WHILE  swap 2 cells + swap
   95:                2 pick swap execute
   96:         UNTIL
   97:         1 cells - @ nip
   98:         ELSE
   99:         2drop drop 0
  100:         THEN ;
  101: 

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