Subversion Repositories c16

D                       [0-9]

L                       [A-Za-z_]

LD                      [0-9A-Za-z_]

ID                      {L}{LD}*

HX                      [0-9A-Fa-f]

%{

#include 

#include 

class Opcode;

class Operand;

class Expression;

#include "assembler_bison.hh"

void count();

int show_token(int op, const char * txt, YYSTYPE & lval);

#define token(x) show_token(x, yytext, yylval)

%}

%%

";".*                   { count(); return token(EOL  ); }

" "                     { count(); }

"\n"                    { count(); return token(EOL  ); }

".BYTE"                 { count(); return token(_BYTE  ); }

".WORD"                 { count(); return token(_WORD  ); }

".OFFSET"               { count(); return token(_OFFSET); }

".EXTERN"               { count(); return token(_EXTERN); }

".STATIC"               { count(); return token(_STATIC); }

ADD                     { count(); return token(ADD    ); }

AND                     { count(); return token(AND    ); }

CALL                    { count(); return token(CALL   ); }

CLRB                    { count(); return token(CLRB   ); }

CLRW                    { count(); return token(CLRW   ); }

DI                      { count(); return token(DI     ); }

DIV_IS                  { count(); return token(DIV_IS ); }

DIV_IU                  { count(); return token(DIV_IU ); }

EI                      { count(); return token(EI     ); }

HALT                    { count(); return token(HALT   ); }

IN                      { count(); return token(IN     ); }

JMP                     { count(); return token(JMP    ); }

LEA                     { count(); return token(LEA    ); }

LNOT                    { count(); return token(LNOT   ); }

MD_STP                  { count(); return token(MD_STP ); }

MD_FIN                  { count(); return token(MD_FIN ); }

MOD_FIN                 { count(); return token(MOD_FIN); }

MUL_IS                  { count(); return token(MUL_IS ); }

MUL_IU                  { count(); return token(MUL_IU ); }

MOVE                    { count(); return token(MOVE   ); }

NEG                     { count(); return token(NEG    ); }

NOT                     { count(); return token(NOT    ); }

NOP                     { count(); return token(NOP    ); }

OUT                     { count(); return token(OUT    ); }

OR                      { count(); return token(OR     ); }

RET                     { count(); return token(RET    ); }

RETI                    { count(); return token(RETI   ); }

SEQ                     { count(); return token(SEQ    ); }

SGE                     { count(); return token(SGE    ); }

SGT                     { count(); return token(SGT    ); }

SLE                     { count(); return token(SLE    ); }

SLT                     { count(); return token(SLT    ); }

SNE                     { count(); return token(SNE    ); }

SHS                     { count(); return token(SHS    ); }

SHI                     { count(); return token(SHI    ); }

SLS                     { count(); return token(SLS    ); }

SLO                     { count(); return token(SLO    ); }

LSL                     { count(); return token(LSL    ); }

LSR                     { count(); return token(LSR    ); }

ASR                     { count(); return token(ASR    ); }

SUB                     { count(); return token(SUB    ); }

XOR                     { count(); return token(XOR    ); }

RR                      { count(); return token(_RR   );  }

R                       { count(); return token(_R    );  }

RS                      { count(); return token(_RS   );  }

RU                      { count(); return token(_RU   );  }

RRZ                     { count(); return token(_RRZ  );  }

RRNZ                    { count(); return token(_RRNZ );  }

LL                      { count(); return token(_LL   );  }

L                       { count(); return token(_L    );  }

LS                      { count(); return token(_LS   );  }

LU                      { count(); return token(_LU   );  }

SP                      { count(); return token(_SP   );  }

[#,:+=()*/-]            { count(); return token(*yytext); }

0[xX]{HX}+              { count();

                          sscanf(yytext + 2, "%X", &yylval._num);

                          return token(INT   ); }

"-"0[xX]{HX}+           { count();

                          sscanf(yytext + 3, "%X", &yylval._num);

                          yylval._num = -yylval._num;

                          return token(INT   ); }

{D}+                    { count();

                          sscanf(yytext, "%d", &yylval._num);

                          return token(INT   ); }

"-"{D}+                 { count();

                          sscanf(yytext + 1, "%d", &yylval._num);

                          yylval._num = -yylval._num;

                          return token(INT   ); }

{ID}                    { count();   return token(IDENT); }

[ \t\v\n\f]             { count(); }

<>                       { return EOFILE;  }

.                       { return ERROR;   }

%%

int yywrap()

{

        return(1);

}

int column = 0;

int row    = 1;

//-----------------------------------------------------------------------------

void count()

{

   for (int i = 0; yytext[i]; i++)

       {

         if (yytext[i] == '\n')        { column = 0;   row++; }

         else if (yytext[i] == '\t')   column += 8 - (column % 8);

         else                          column++;

       }

}

//-----------------------------------------------------------------------------

int yyerror(const char *s)

{

   printf("\n%s Line %d Col %d\n", s, row, column);

   fflush(stdout);

}

//-----------------------------------------------------------------------------

bool did_crlf = false;

bool show_it  = false;

int show_token(int op, const char * txt, YYSTYPE & lval)

{

   if (op == INT)

      {

        did_crlf = false;

        if (show_it)   fprintf(stderr, "Token %3d : %s\n", op, txt);

      }

   else if (op == EOL)

      {

        lval._txt = 0;

        if (!did_crlf && show_it)   fprintf(stderr, "\n");

        did_crlf = true;

      }

   else

      {

        assert(txt);

        did_crlf = false;

        if (show_it)   fprintf(stderr, "Token %3d : %s\n", op, txt);

        char * cp = new char[strlen(txt) + 1];

        strcpy(cp, txt);

        lval._txt = cp;

      }

    return op;

}

//-----------------------------------------------------------------------------