478 lines
12 KiB
Text
478 lines
12 KiB
Text
%token ILLEGAL
|
|
%token ASSYM
|
|
%token BASESYM
|
|
%token CALLSYM
|
|
%token CLEARSYM
|
|
%token CLOSESYM
|
|
%token DATASYM
|
|
%token DEFINTSYM
|
|
%token DEFSNGSYM
|
|
%token DEFDBLSYM
|
|
%token DEFSTRSYM
|
|
%token DEFSYM
|
|
%token DIMSYM
|
|
%token ELSESYM
|
|
%token ERRSYM
|
|
%token ERLSYM
|
|
%token ERRORSYM
|
|
%token ELSESYM
|
|
%token FIELDSYM
|
|
%token FORSYM
|
|
%token <integer> FUNCTION
|
|
%token <Sptr> FUNCTID
|
|
%token INKEYSYM
|
|
%token GETSYM
|
|
%token GOSUBSYM
|
|
%token GOTOSYM
|
|
%token <integer> IFSYM
|
|
%token INPUTSYM
|
|
%token LETSYM
|
|
%token LINESYM
|
|
%token LSETSYM
|
|
%token MIDSYM
|
|
%token NEXTSYM
|
|
%token ONSYM
|
|
%token OPENSYM
|
|
%token OPTIONSYM
|
|
%token PRINTSYM
|
|
%token POKESYM
|
|
%token PUTSYM
|
|
%token RANDOMIZESYM
|
|
%token READSYM
|
|
%token REMSYM
|
|
%token RESTORESYM
|
|
%token RETURNSYM
|
|
%token ENDSYM
|
|
%token STOPSYM
|
|
%token STEPSYM
|
|
%token SWAPSYM
|
|
%token THENSYM
|
|
%token TOSYM
|
|
%token <integer> TRONOFFSYM
|
|
%token USINGSYM
|
|
%token USRSYM
|
|
%token WHILESYM
|
|
%token WENDSYM
|
|
%token WRITESYM
|
|
/* special tokens */
|
|
%token EOLN
|
|
%token INTVALUE
|
|
%token FLTVALUE
|
|
%token DBLVALUE
|
|
%token <integer> STRVALUE
|
|
%token UNARYSYM
|
|
%token <Sptr> IDENTIFIER
|
|
%token ANDSYM
|
|
%token ORSYM
|
|
%token VARPTR
|
|
|
|
%type <Sptr> arraydcl identifier indexed
|
|
%type <cptr> getput
|
|
%type <integer> exprlist expression negation compare sum term factor
|
|
%type <integer> parmlist variable printlist inputtail funcname funccall
|
|
|
|
%left <integer> BOOLOP
|
|
%left NOTSYM
|
|
%left '=' '<' '>' LESYM GESYM NESYM
|
|
%left <integer> RELOP
|
|
%left '+' '-'
|
|
%left '*' '/' '\\' MODSYM
|
|
%left '^'
|
|
%left UNARYMINUS
|
|
|
|
%{
|
|
#define YYDEBUG
|
|
#include "bem.h"
|
|
|
|
typedef union {
|
|
int integer ;
|
|
Symbol *Sptr ;
|
|
char *cptr ;
|
|
} YYSTYPE ;
|
|
|
|
int ival;
|
|
double dval;
|
|
char *sval;
|
|
int e1,e2;
|
|
|
|
char *formatstring; /* formatstring used for printing */
|
|
Symbol *s; /* Symbol dummy */
|
|
%}
|
|
%%
|
|
programline : INTVALUE {newblock(ival); newemblock(ival);} stmts EOLN
|
|
| '#' INTVALUE STRVALUE EOLN
|
|
| EOLN
|
|
;
|
|
|
|
|
|
stmts : singlestmt
|
|
| stmts ':' singlestmt
|
|
;
|
|
|
|
singlestmt : callstmt
|
|
| clearstmt
|
|
| closestmt
|
|
| datastmt
|
|
| deffnstmt
|
|
| defvarstmt
|
|
| defusrstmt
|
|
| dimstmt
|
|
| ERRORSYM expression {errorstmt($2);}
|
|
| fieldstmt
|
|
| forstmt
|
|
| getstmt
|
|
| gosubstmt
|
|
| ongotostmt
|
|
| ifstmt
|
|
| illegalstmt
|
|
| inputstmt
|
|
| letstmt
|
|
| lineinputstmt
|
|
| lsetstmt
|
|
| midstmt
|
|
| exceptionstmt
|
|
| nextstmt
|
|
| GOTOSYM INTVALUE {gotostmt(ival);}
|
|
| openstmt
|
|
| optionstmt
|
|
| pokestmt
|
|
| printstmt
|
|
| randomizestmt
|
|
| readstmt
|
|
| REMSYM
|
|
| restorestmt
|
|
| returnstmt
|
|
| ENDSYM { emcode("loc","0");
|
|
emcode("cal","$_hlt");
|
|
emcode("asp",EMINTSIZE);}
|
|
| STOPSYM { emcode("cal","$_stop");}
|
|
| swapstmt
|
|
| TRONOFFSYM { tronoff=$1;}
|
|
| whilestmt
|
|
| wendstmt
|
|
| writestmt
|
|
| /* EMPTY STATEMENT */
|
|
;
|
|
|
|
illegalstmt: ILLEGAL {illegalcmd();}
|
|
|
|
callstmt: CALLSYM IDENTIFIER parmlist ')'
|
|
{
|
|
emcode("cal",proclabel($2->symname));
|
|
while($3 -- >0) emcode("asp",EMPTRSIZE);
|
|
}
|
|
| CALLSYM IDENTIFIER
|
|
{ emcode("cal",proclabel($2->symname));}
|
|
|
|
parmlist: '(' variable { $$=1;}
|
|
| parmlist ',' variable { $$= $1+1;}
|
|
|
|
clearstmt: CLEARSYM {warning("statement ignored");}
|
|
| CLEARSYM ',' expression {warning("statement ignored");}
|
|
| CLEARSYM ',' expression ',' expression {warning("statement ignored");}
|
|
closestmt: CLOSESYM filelist
|
|
| CLOSESYM {emcode("cal","$_close");}
|
|
|
|
filelist: cross intvalue { emcode("loc",itoa(ival));
|
|
emcode("cal","$_clochn");
|
|
emcode("asp",EMINTSIZE);}
|
|
| filelist ',' cross intvalue { emcode("loc",itoa(ival));
|
|
emcode("cal","$_clochn");
|
|
emcode("asp",EMINTSIZE);}
|
|
|
|
datastmt: DATASYM {datastmt();} datalist {fprintf(datfile,"\n");}
|
|
|
|
dataelm : INTVALUE {fprintf(datfile,"%d",ival);}
|
|
| '-' INTVALUE {fprintf(datfile,"%d",-ival);}
|
|
| FLTVALUE {fprintf(datfile,"%f",dval);}
|
|
| '-' FLTVALUE {fprintf(datfile,"%f",-dval);}
|
|
| STRVALUE {fprintf(datfile,"\"%s\"",sval);}
|
|
| IDENTIFIER {fprintf(datfile,"\"%s\"",sval);}
|
|
;
|
|
|
|
datalist: dataelm
|
|
| datalist ',' {fputc(',',datfile);} dataelm
|
|
;
|
|
|
|
deffnstmt: DEFSYM heading '=' expression {endscope($4);}
|
|
|
|
heading : FUNCTID { newscope($1); heading();}
|
|
| FUNCTID {newscope($1);} '(' idlist ')' { heading();}
|
|
|
|
idlist : IDENTIFIER { dclparm($1);}
|
|
| idlist ',' IDENTIFIER { dclparm($3);}
|
|
;
|
|
|
|
defvarstmt: DEFINTSYM { setdefaulttype( INTTYPE);}
|
|
| DEFSNGSYM { setdefaulttype( FLOATTYPE);}
|
|
| DEFDBLSYM { setdefaulttype( DOUBLETYPE);}
|
|
| DEFSTRSYM { setdefaulttype( STRINGTYPE);}
|
|
|
|
defusrstmt: DEFSYM USRSYM error ':' {illegalcmd();}
|
|
|
|
dimstmt: DIMSYM arraydcl ')' {dclarray($2);}
|
|
| dimstmt ',' arraydcl ')' {dclarray($3);}
|
|
;
|
|
|
|
arraydcl : IDENTIFIER '(' INTVALUE {$$=$1; s= $1;
|
|
s->dimlimit[s->dimensions]=ival;
|
|
s->dimensions++;
|
|
}
|
|
| arraydcl ',' INTVALUE {$$=$1; s= $1;
|
|
if(s->dimensions<MAXDIMENSIONS)
|
|
{
|
|
s->dimlimit[s->dimensions]=ival;
|
|
s->dimensions++;
|
|
} else
|
|
error("too many dimensions");
|
|
}
|
|
|
|
|
|
|
|
fieldstmt: FIELDSYM cross intvalue {setchannel(ival);} ',' fieldlist {notyetimpl();}
|
|
|
|
fieldlist: intvalue ASSYM variable
|
|
| fieldlist ',' intvalue ASSYM variable
|
|
;
|
|
|
|
forstmt: FORSYM IDENTIFIER {forinit($2);} '=' expression {forexpr($5);}
|
|
TOSYM expression {forlimit($8);} step
|
|
;
|
|
|
|
step : STEPSYM expression {forstep($2);}
|
|
| /*EMPTY*/ {emcode("loc","1"); forstep(INTTYPE);}
|
|
;
|
|
|
|
nextstmt: NEXTSYM IDENTIFIER {nextstmt($2);}
|
|
| NEXTSYM { nextstmt((Symbol *)0);}
|
|
| nextstmt ',' IDENTIFIER { nextstmt($3);}
|
|
|
|
getstmt: getput {emcode("loc",itoa(0));
|
|
emcode("cal",$1);
|
|
emcode("asp",EMINTSIZE);}
|
|
| getput ',' intvalue
|
|
{ /* position seek pointer first*/
|
|
emcode("loc",itoa(ival));
|
|
emcode("cal",$1);
|
|
emcode("asp",EMINTSIZE);
|
|
}
|
|
getput: GETSYM cross intvalue { setchannel(ival); $$= "$_getrec";}
|
|
| PUTSYM cross intvalue { setchannel(ival); $$= "$_putsym";}
|
|
|
|
gosubstmt: GOSUBSYM INTVALUE {gosubstmt(ival);}
|
|
|
|
returnstmt: RETURNSYM {returnstmt();}
|
|
|
|
ifstmt: IFSYM expression {$1=ifstmt($2);} thenpart
|
|
{$1=thenpart($1);} elsepart {elsepart($1);}
|
|
;
|
|
|
|
thenpart: THENSYM INTVALUE {gotostmt(ival);}
|
|
| THENSYM stmts
|
|
| GOTOSYM INTVALUE {gotostmt(ival);}
|
|
;
|
|
elsepart: ELSESYM INTVALUE {gotostmt(ival);}
|
|
| ELSESYM stmts
|
|
| /* empty */
|
|
;
|
|
|
|
inputstmt: INPUTSYM semiprompt readlist
|
|
| INPUTSYM '#' intvalue {setchannel(ival);}',' readlist
|
|
;
|
|
|
|
semiprompt : semi STRVALUE ';' { loadstr($2); prompt(1);}
|
|
| semi STRVALUE ',' { loadstr($2); prompt(0);}
|
|
| /*EMPTY*/ { setchannel(-1);
|
|
emcode("cal","$_qstmark");}
|
|
|
|
semi : ';' | /* empty */ ;
|
|
|
|
letstmt: LETSYM {e1=where();} variable {e2=where();}
|
|
'=' expression {assign($3,$6);}
|
|
| {e1=where();} variable {e2=where();}
|
|
'=' expression {assign($2,$5);}
|
|
|
|
lineinputstmt: LINESYM INPUTSYM semiprompt {setchannel(-1);} variable {linestmt($5);}
|
|
| LINESYM '#' intvalue {setchannel(ival);} ',' variable {linestmt($6);}
|
|
;
|
|
|
|
readlist: readelm
|
|
| readlist ',' readelm
|
|
;
|
|
readelm: variable {readelm($1);}
|
|
|
|
lsetstmt: LSETSYM variable '=' expression {notyetimpl();}
|
|
|
|
midstmt: MIDSYM '$' midparms '=' expression
|
|
{ emcode("cal","$_midstmt");
|
|
emcode("asp",EMINTSIZE);
|
|
emcode("asp",EMINTSIZE);
|
|
emcode("asp",EMPTRSIZE);
|
|
emcode("asp",EMPTRSIZE);}
|
|
|
|
midparms: '(' midfirst midsec midthird ')'
|
|
|
|
midfirst: expression { conversion($1,STRINGTYPE); }
|
|
midsec: ',' expression { conversion($2,INTTYPE); }
|
|
midthird: ',' expression { conversion($2,INTTYPE); }
|
|
| /* empty */ { emcode("loc","-1");}
|
|
|
|
exceptionstmt: ONSYM ERRORSYM GOTOSYM INTVALUE {exceptstmt(ival);}
|
|
|
|
ongotostmt: ONSYM expression
|
|
GOSUBSYM constantlist {ongosubstmt($2);}
|
|
| ONSYM expression
|
|
GOTOSYM constantlist {ongotostmt($2);}
|
|
|
|
constantlist: INTVALUE {jumpelm(ival);}
|
|
| constantlist ',' INTVALUE { jumpelm(ival);}
|
|
|
|
openstmt: OPENSYM mode openchannel expression
|
|
{ conversion($4,STRINGTYPE); openstmt(0);}
|
|
| OPENSYM mode openchannel
|
|
expression {conversion($4,STRINGTYPE);}
|
|
INTVALUE { openstmt(ival);}
|
|
|
|
openchannel: cross INTVALUE ',' { setchannel(ival);}
|
|
|
|
mode : expression ',' {conversion($1,STRINGTYPE);}
|
|
| ',' { emcode("lae","_iomode");}
|
|
;
|
|
|
|
optionstmt: OPTIONSYM BASESYM intvalue { optionbase(ival);}
|
|
|
|
printstmt: PRINTSYM {setchannel(-1);emcode("cal","$_nl");}
|
|
| PRINTSYM file format printlist
|
|
{ if( $4) emcode("cal","$_nl");}
|
|
file : '#' intvalue ',' {setchannel(ival);}
|
|
| /* empty */ {setchannel(-1);}
|
|
;
|
|
format : USINGSYM STRVALUE ';' { loadstr($2);}
|
|
| USINGSYM variable ';' {
|
|
if($2!=STRINGTYPE) error("string variable expected");}
|
|
| /* empty */ {formatstring=0;}
|
|
|
|
printlist: expression { printstmt($1); $$=1;}
|
|
| ',' { zone(0); $$=0;}
|
|
| ';' { zone(1); $$=0;}
|
|
| printlist expression { printstmt($2); $$=1;}
|
|
| printlist ',' { zone(1);$$=0;}
|
|
| printlist ';' { zone(0);$$=0;}
|
|
;
|
|
pokestmt: POKESYM expression ',' expression {pokestmt($2,$4);}
|
|
;
|
|
randomizestmt: RANDOMIZESYM
|
|
{ emcode("cal","$_randomi");}
|
|
| RANDOMIZESYM expression
|
|
{ conversion($2,INTTYPE);
|
|
emcode("cal","$_setrand");
|
|
emcode("asp",EMINTSIZE);}
|
|
|
|
readstmt: READSYM {setchannel(0);} variable { readelm($3);}
|
|
| readstmt ',' variable { readelm($3);}
|
|
|
|
restorestmt: RESTORESYM INTVALUE { restore(ival);}
|
|
| RESTORESYM { restore(0);}
|
|
|
|
swapstmt: SWAPSYM variable ',' variable { swapstmt($2,$4);}
|
|
|
|
whilestmt: WHILESYM {whilestart();} expression {whiletst($3);}
|
|
;
|
|
|
|
wendstmt : WENDSYM {wend();}
|
|
|
|
writestmt: WRITESYM {setchannel(-1);emcode("cal","$_wrnl");}
|
|
| WRITESYM file writelist {emcode("cal","$_wrnl");}
|
|
;
|
|
|
|
writelist: expression {writestmt($1,0);}
|
|
| writelist ',' expression {writestmt($3,1);}
|
|
;
|
|
|
|
cross: '#' | /* empty */
|
|
|
|
intvalue: INTVALUE
|
|
;
|
|
|
|
variable: identifier { $$=loadaddr($1);}
|
|
| indexed ')' {$$=endarrayload();}
|
|
| ERRSYM {emcode("lae","_errsym"); $$= INTTYPE;}
|
|
| ERLSYM {emcode("lae","_erlsym"); $$= INTTYPE;}
|
|
;
|
|
indexed : identifier '(' {newarrayload($1);}
|
|
expression {loadarray($4); $$=$1;}
|
|
| indexed ',' expression {loadarray($3); $$=$1;}
|
|
;
|
|
|
|
|
|
expression: negation
|
|
| negation BOOLOP expression {$$=boolop($1,$3,$2);}
|
|
|
|
negation: NOTSYM compare {$$=boolop($2,0,NOTSYM);}
|
|
| compare
|
|
;
|
|
compare : sum
|
|
| sum RELOP sum {$$=relop($1,$3,$2);}
|
|
| sum '=' sum {$$=relop($1,$3,'=');}
|
|
|
|
sum : term
|
|
| term '-' sum {$$=plusmin($1,$3,'-');}
|
|
| term '+' sum {$$=plusmin($1,$3,'+');}
|
|
term : factor
|
|
| factor '^' factor {$$=power($1,$3);}
|
|
| factor '*' term {$$=muldiv($1,$3,'*');}
|
|
| factor '\\' term {$$=muldiv($1,$3,'\\');}
|
|
| factor '/' term {$$=muldiv($1,$3,'/');}
|
|
| factor MODSYM term {$$=muldiv($1,$3,MODSYM);}
|
|
factor : INTVALUE {$$=loadint(ival);}
|
|
| '(' expression ')' {$$=$2;}
|
|
| '-' factor { $$=negate($2);}
|
|
| FLTVALUE {$$=loaddbl(dval);}
|
|
| STRVALUE {$$= STRINGTYPE; loadstr($1);}
|
|
| variable {$$=$1; loadvar($1);}
|
|
| INKEYSYM '$' { emcode("cal","$_inkey");
|
|
emcode("lfr",EMPTRSIZE);
|
|
$$= STRINGTYPE;
|
|
}
|
|
| VARPTR '(' '#' intvalue ')' { warning("Not supported"); $$=INTTYPE;}
|
|
| FUNCTION {$$= callfcn($1,0);}
|
|
| FUNCTION '(' cross exprlist')' {$$=callfcn($1,$4);}
|
|
| funcname { $$=fcnend(0);}
|
|
| funcname funccall ')' { $$=fcnend($2);}
|
|
| MIDSYM '$' midparms
|
|
{ warning("Unsupported function call");
|
|
emcode("cal","$_mid");
|
|
emcode("asp",EMINTSIZE);
|
|
emcode("asp",EMINTSIZE);
|
|
emcode("asp",EMPTRSIZE);
|
|
/* emcode("asp",itoa($3)); */
|
|
emcode("lfr",EMPTRSIZE);
|
|
$$= STRINGTYPE;
|
|
}
|
|
| INPUTSYM '$' '(' expression inputtail
|
|
{
|
|
emcode("cal","$_inpfcn");
|
|
emcode("asp",EMINTSIZE);
|
|
emcode("asp",EMINTSIZE);
|
|
emcode("asp",EMPTRSIZE);
|
|
$$= STRINGTYPE;
|
|
}
|
|
inputtail: ',' expression ')' { conversion($2,INTTYPE); $$= INTTYPE;}
|
|
| ',' '#' expression ')' { conversion($3,INTTYPE); $$= INTTYPE;}
|
|
| ')' { emcode("loc","-1"); $$= INTTYPE;}
|
|
|
|
funcname: FUNCTID {$$=fcncall($1);}
|
|
|
|
funccall: '(' expression { callparm(0,$2); $$=1;}
|
|
| funccall ',' expression { callparm($1,$3); $$=$1+1;}
|
|
|
|
identifier: IDENTIFIER { dcltype($1); $$=$1;}
|
|
|
|
exprlist: expression { typetable[0]= $1; $$=1;}
|
|
| exprlist ',' expression { typetable[$1]=$3;$$=$1+1;}
|
|
|
|
%%
|
|
#ifndef NORCSID
|
|
static char rcs_id[] = "$Header$" ;
|
|
#endif
|
|
#include "basic.lex"
|