Author Topic: tiny tokenizer microAT  (Read 340 times)

Aurel

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tiny tokenizer microAT
« on: 19. March 2019, 14:10:25 »
edit;
(Y)
here is a tiny tokenizer for experimental purpose.
Free for personal use only. - LIC:aSiS!

Code: [Select]
'microAT tokenizer by Aurel 26.3.2019
Include "microBh.inc"
declare sub tokenizer( src as string) as INT
int tkNULL=0, tkPLUS=1, tkMINUS=2, tkMULTI=3, tkDIVIDE=4
int tkCOLON=5, tkCOMMA=6, tkLPAREN=7, tkRPAREN=8, tkLBRACKET=9, tkRBRACKET=10
int tkIDENT = 11 , tkNUMBER = 12 , tkSTRING = 13, tkCOMMAND =14 ,tkEOL = 15
int tkEQUAL = 16, tkMORE = 17, tkLESS =18,tkAND=19, tkOR=20, tkNOT = 21
int tkHASH=22 , tkSSTR=23, tkMOD=24

string tokList[1024] : int typList[1024]   'token/type arrays
int start , p = 1 ,start = p ,tp , tn, n ,ltp=1     'init
int lineCount, Lpar, Rpar, Lbrk, Rbrk, tokerr ,codeLen=0
string code,ch,tch,tk ,crlf=chr(13)+chr(10),bf,ntk
'--------------------------------------------------------------------
'code = "2*(3+4)"     + crlf  +  ' line 1
       '"': b =6 "   + crlf  +  ' line 2
      ' ":if a>b"    + crlf     ' line 3
'--------------------------------------------------------------------
sub tokenizer(src as string) as int
'print "tokenizer run;" + src
lineCount=0:ltp=start
while p <= len(src)
 '................................................................................................         
    ch = mid(src,p,1)                                                  'get char
 If asc(ch)=32 : p=p+1 : end if                                        ' skip blank space[ ]
 If asc(ch)=9  : p=p+1 : end if                                        ' skip TAB [    ]
 if asc(ch)=13 : p=p+1 : end if                                        ' skip CR
 if asc(ch)=39                                                         ' skip comment line[ ' ]                                                       
    while asc(ch) <> 10
      p++ : ch = mid(src,p,1) : if asc(ch)= 10 then exit while
    wend
   p++: goto endLoop                                                   ' jump to end of loop
 end if

 If asc(ch)=10                                                         ' EOL
if Lpar > Rpar  : tokerr=3 : goto tokExit : end if   ' if Rparen ((...)
if Lpar < Rpar  : tokerr=4 : goto tokExit : end if   ' if Lparen (...))
if Lbrk > Rbrk  : tokerr=5 : goto tokExit : end if   ' if Lbracket [..
if Lbrk < Rbrk  : tokerr=6 : goto tokExit : end if   ' if Rbracket ...]
 lineCount++ : tp++ : tokList[tp]="EOL" :typList[tp]= tkEOL: tk="": ch="" : p++
 End if
'--------------------------------------------------------
 If asc(ch)=34                                                         ' if char is QUOTE "
 p++ :  ch = mid(src,p,1) : tk=ch : p++                                ' skip quote :add ch TO tk buffer: p+1
while asc(ch) <> 34       
   ch = mid(src,p,1) : if asc(ch)= 34 then exit while
        tk=tk+ch : p++
        IF ch = chr(10): tokerr = 2: goto tokExit : end if
wend
    tp++ : tokList[tp]= tk :typList[tp]= tkSTRING: tk="":ch="": p++    ' add quoted string to token list
 End if
'-------------------------------------------------------           
 If (asc(ch)>96 and asc(ch)<123)          ' [a-z]
   while (asc(ch)>96 and asc(ch)<123) or (asc(ch)>47 and asc(ch)<58)   ' [a-z0-9]*
         tk=tk+ch : p++ : ch = mid(src,p,1)
   wend
      ' ' add token ,add token type/IDENT:{VAR/COMMAND}
       tp++ : tokList[tp] = tk :typList[tp]= tkIDENT: tk="":ch=""       
 End If
'--------------------------------------------------------------
 If (asc(ch)>47 and asc(ch)<58)                                       ' [0-9.]
    while (asc(ch)>47 AND asc(ch)<58) OR asc(ch)=46                   ' [0-9[0.0]]*
        tk=tk+ch :p++ : ch = mid(src,p,1)
    wend
       ' add token ,add token type/NUMBER
       tp++ : tokList[tp] = tk : typList[tp]= tkNUMBER: tk="":ch=""
 End if
'--------------------------------------------------------------------
 If asc(ch)=43 : tp++ : tokList[tp] = ch :typList[tp]= tkPLUS:    ch="" : p++ : End if  ' + plus
 If asc(ch)=45 : tp++ : tokList[tp] = ch :typList[tp]= tkMINUS:   ch="" : p++ : End if  ' - minus
 If asc(ch)=42 : tp++ : tokList[tp] = ch :typList[tp]= tkMULTI:   ch="" : p++ : End if  ' * multiply
 If asc(ch)=47 : tp++ : tokList[tp] = ch :typList[tp]= tkDIVIDE:  ch="" : p++ : End if ' / divide
 If asc(ch)=40 : tp++ : tokList[tp] = ch :typList[tp]= tkLPAREN:  ch="" : p++ : Lpar++ : End if ' ( Lparen
 If asc(ch)=41 : tp++ : tokList[tp] = ch :typList[tp]= tkRPAREN:  ch="" : p++ : Rpar++ : End if ' ) Rparen
 If asc(ch)=44 : tp++ : tokList[tp] = ch :typList[tp]= tkCOMMA:   ch="" : p++ : End if  ' , comma
 If asc(ch)=58 : tp++ : tokList[tp] = ch :typList[tp]= tkCOLON:   ch="" : p++ : End if  ' : colon
 If asc(ch)=60 : tp++ : tokList[tp] = ch :typList[tp]= tkLESS:    ch="" : p++ : End if  ' < less
 If asc(ch)=61 : tp++ : tokList[tp] = ch :typList[tp]= tkEQUAL:   ch="" : p++ : End if  ' = equal
 If asc(ch)=62 : tp++ : tokList[tp] = ch :typList[tp]= tkMORE:    ch="" : p++ : End if  ' > more(greater)
 If asc(ch)=91 : tp++ : tokList[tp] = ch :typList[tp]= tkLBRACKET:ch="" : p++ : Lbrk++ :End if  ' [ Lbracket
 If asc(ch)=93 : tp++ : tokList[tp] = ch :typList[tp]= tkRBRACKET:ch="" : p++ : Rbrk++ :End if  ' ] Rbracket
 If asc(ch)=38 : tp++ : tokList[tp] = ch :typList[tp]= tkAND:     ch="" : p++ : End if  ' & AND
 If asc(ch)=124 :tp++ : tokList[tp] = ch :typList[tp]= tkOR:      ch="" : p++ : End if       ' | OR
 If asc(ch)=33 : tp++ : tokList[tp] = ch :typList[tp]= tkNOT:     ch="" : p++ : End if  ' ! NOT
 If asc(ch)=35 : tp++ : tokList[tp] = ch :typList[tp]= tkHASH:    ch="" : p++ : End if  ' # hash
 If asc(ch)=36 : tp++ : tokList[tp] = ch :typList[tp]= tkSSTR:    ch="" : p++ : End if  ' $ $TRING
 If asc(ch)=37 : tp++ : tokList[tp] = ch :typList[tp]= tkMOD :    ch="" : p++ : End if  ' % percent/MOD
 
IF ASC(ch)>125: tokerr = 1 : goto tokExit: END IF
'.............................................................................................
endLoop:
wend
Return tp
tokExit:
  IF tokerr > 0
if tokerr = 1: MsgBox "Unknown token!-[ " + ch +" ] at LINE: " + str(lineCount),"T:Error"  : end if
if tokerr = 2: MsgBox "Unclosed Quote!- at LINE: " + str(lineCount),"T:Error"              : end if
if tokerr = 3: MsgBox "Missing right paren! ((...)- at LINE: " + str(lineCount),"T:Error"  : end if
if tokerr = 4: MsgBox "Missing left paren!- at LINE: " + str(lineCount),"T:Error"          : end if
if tokerr = 5: MsgBox "Missing right bracket!- at LINE: " + str(lineCount),"T:Error"       : end if
if tokerr = 6: MsgBox "Missing left bracket!- at LINE: " + str(lineCount),"T:Error"        : end if
Return 0
  END IF
end sub

/*'call tokenizer..tested(ident,numbers) /////////////////////////////////
int tn: tn = tokenizer(code)
*/
 'if tn=0 then goto ExitProgram
sub run_tokenizer(s as string )
 tn = tokenizer(s)
print "Number of tokens: " + str(tn) + crlf + "Number of lines: " + str(lineCount)
for n = 1 to tn : bf = bf + tokList[n] + crlf : next n
MsgBox bf,"Token List:"
end sub

if codeLen>0
ExitProgram:
print "Program Terminated!"
end if


« Last Edit: 27. March 2019, 08:58:46 by Aurel »

Tomaaz

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Re: tiny tokenizer microAT
« Reply #1 on: 28. March 2019, 17:16:51 »
And how much it is for commercial use?  ;D

Aurel

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Re: tiny tokenizer microAT
« Reply #2 on: 28. March 2019, 22:31:27 »
Free for personal use only. - LIC:aSiS!         ;D

Tomaaz

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Re: tiny tokenizer microAT
« Reply #3 on: 29. March 2019, 17:11:58 »
And how much it is for commercial use?  ;D

ZXDunny

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Re: tiny tokenizer microAT
« Reply #4 on: 29. March 2019, 17:41:42 »
And how much it is for commercial use?  ;D

Now you're just being obtuse. We first need to determine what commercial use this would be, before any monetary value can be attached.

Tomaaz

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Re: tiny tokenizer microAT
« Reply #5 on: 29. March 2019, 19:50:07 »
A new commercial DAW for C64 with scripting utilities?

ZXDunny

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Re: tiny tokenizer microAT
« Reply #6 on: 29. March 2019, 23:58:48 »
A new commercial DAW for C64 with scripting utilities?

Sure, why not? I wish you every success in your commercial venture, may great profits come your way :D