793 lines
17 KiB
Plaintext
793 lines
17 KiB
Plaintext
/*
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* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
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* See the copyright notice in the ACK home directory, in the file "Copyright".
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*/
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%token ILLEGAL ;
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%token ASSYM ;
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%token BASESYM ;
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%token CALLSYM ;
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%token CLEARSYM ;
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%token CLOSESYM ;
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%token DATASYM ;
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%token DEFINTSYM ;
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%token DEFSNGSYM ;
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%token DEFDBLSYM ;
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%token DEFSTRSYM ;
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%token DEFSYM ;
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%token DIMSYM ;
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%token ELSESYM ;
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%token ERRSYM ;
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%token ERLSYM ;
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%token ERRORSYM ;
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%token FIELDSYM ;
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%token FORSYM ;
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%token FUNCTION ;
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%token FUNCTID ;
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%token INKEYSYM ;
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%token GETSYM ;
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%token GOSUBSYM ;
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%token GOTOSYM ;
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%token IFSYM ;
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%token INPUTSYM ;
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%token LETSYM ;
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%token LINESYM ;
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%token LSETSYM ;
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%token MIDSYM ;
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%token NEXTSYM ;
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%token ONSYM ;
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%token OPENSYM ;
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%token OPTIONSYM ;
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%token PRINTSYM ;
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%token POKESYM ;
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%token PUTSYM ;
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%token RANDOMIZESYM ;
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%token READSYM ;
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%token REMSYM ;
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%token RESTORESYM ;
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%token RETURNSYM ;
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%token ENDSYM ;
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%token STOPSYM ;
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%token STEPSYM ;
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%token SWAPSYM ;
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%token THENSYM ;
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%token TOSYM ;
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%token TRONOFFSYM ;
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%token USINGSYM ;
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%token USRSYM ;
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%token WHILESYM ;
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%token WENDSYM ;
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%token WRITESYM ;
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/* special tokens */
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%token EOLN ;
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%token INTVALUE ;
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%token FLTVALUE ;
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%token DBLVALUE ;
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%token STRVALUE ;
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%token UNARYSYM ;
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%token IDENTIFIER ;
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%token ANDSYM ;
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%token ORSYM ;
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%token IMPSYM ;
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%token EQVSYM ;
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%token XORSYM ;
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%token VARPTR ;
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/* Those were originally %left */
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%token BOOLOP ;
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%token NOTSYM ;
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%token RELOP ;
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%token MODSYM ;
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/* Some contstant declared as tokens (?) */
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%token LESYM ;
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%token GESYM ;
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%token NESYM ;
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%token UNARYMINUS ;
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{
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#define YYDEBUG
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#include "bem.h"
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#include "llmess.c"
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typedef union {
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int integer ;
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Symbol *Sptr ;
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char *cptr ;
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} YYSTYPE ;
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int basicline;
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int yydebug;
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YYSTYPE yylval;
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int ival;
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char *dval;
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char *sval;
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int in_data = 0; /* set if processing DATA statement */
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char *formatstring; /* formatstring used for printing */
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Symbol *s; /* Symbol dummy */
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#include "yylexp.c"
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#include "basic.lex"
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}
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%lexical yylexp;
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%start LLparse,programline ;
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programline
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: INTVALUE
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{ basicline = ival;newblock(ival); newemblock(ival); }
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stmts EOLN
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| '#' INTVALUE STRVALUE EOLN
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| EOLN
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;
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stmts : singlestmt
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[ %while ( LLsymb == ':' ) ':' singlestmt ]*
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;
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singlestmt { int d2 ; }
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: callstmt
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| clearstmt
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| CLOSESYM closestmt
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| datastmt
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| defstmt
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| defvarstmt
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| dimstmt
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| ERRORSYM expression(&d2) { errorstmt(d2); }
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| fieldstmt
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| forstmt
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| getstmt
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| gosubstmt
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| onstmt
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| ifstmt
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| illegalstmt
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| inputstmt
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| letstmt
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| lineinputstmt
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| lsetstmt
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| midstmt
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| NEXTSYM nextstmt
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| GOTOSYM INTVALUE { gotostmt(ival); }
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| openstmt
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| optionstmt
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| pokestmt
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| printstmt
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| randomizestmt
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| readstmt
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| REMSYM
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| restorestmt
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| returnstmt
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| ENDSYM { C_loc((arith) 0 );
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C_cal("_hlt");
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C_asp((arith) BEMINTSIZE);
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}
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| STOPSYM { C_cal("_stop"); }
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| swapstmt
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| TRONOFFSYM { tronoff=yylval.integer; }
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| whilestmt
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| wendstmt
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| writestmt
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| /* EMPTY STATEMENT */
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;
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illegalstmt: ILLEGAL { illegalcmd(); }
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;
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callstmt { Symbol *id; int i; }
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: CALLSYM
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IDENTIFIER { id = yylval.Sptr; }
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[ parmlist(&i)
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{ C_cal(id->symname);
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C_asp((arith) (i*BEMPTRSIZE));
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}
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| /* empty */
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{ C_cal(id->symname); }
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]
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;
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parmlist(int *ip;) { int var ; }
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: '('
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variable(&var) { *ip = 1; }
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[ ',' variable(&var) { *ip = *ip + 1; } ]*
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')'
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;
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clearstmt { int exp; }
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: CLEARSYM [ ',' expression(&exp) ]*2
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{ warning("statement ignored"); }
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;
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closestmt: filelist
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| /* empty */ { C_cal("_close"); }
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;
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filelist { int intv; }
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: cross
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intvalue(&intv)
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{ C_loc((arith) ival);
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C_cal("_clochn");
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C_asp((arith) BEMINTSIZE);
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}
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[ ','
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cross
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intvalue(&intv)
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{ C_loc((arith) ival);
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C_cal("_clochn");
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C_asp((arith) BEMINTSIZE);
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}
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]* ;
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datastmt: DATASYM { datastmt(); in_data = 1;}
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datalist { fprint(datfile,"\n"); in_data = 0; }
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;
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dataelm : INTVALUE { fprint(datfile,"%d",ival); }
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| '-' [ INTVALUE { fprint(datfile,"%d",-ival); }
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| FLTVALUE { fprint(datfile,"-%s",dval); }
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]
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| FLTVALUE { fprint(datfile,dval); }
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| STRVALUE { fprint(datfile,"\"%s\"",sval); }
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| IDENTIFIER { fprint(datfile,"\"%s\"",sval); }
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;
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datalist: dataelm
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[ ',' { fprint(datfile,","); }
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dataelm ]*
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;
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defstmt : DEFSYM
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[ deffnstmt
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| defusrstmt
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]
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;
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deffnstmt { int exp; }
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: heading '=' expression(&exp)
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{ endscope(exp); }
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;
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heading : FUNCTID { newscope(yylval.Sptr); }
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[ '(' idlist ')' ]? { heading(); }
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;
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idlist : IDENTIFIER { dclparm(yylval.Sptr); }
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[ ',' IDENTIFIER { dclparm(yylval.Sptr); }
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]*
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;
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defvarstmt: DEFINTSYM { setdefaulttype( INTTYPE); }
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| DEFSNGSYM { setdefaulttype( FLOATTYPE); }
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| DEFDBLSYM { setdefaulttype( DOUBLETYPE); }
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| DEFSTRSYM { setdefaulttype( STRINGTYPE); }
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;
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defusrstmt: USRSYM ':' { illegalcmd(); }
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;
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dimstmt { Symbol *symp; }
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: DIMSYM arraydcl(&symp) ')' { dclarray(symp); }
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[ ',' arraydcl(&symp) ')' { dclarray(symp); }
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]*
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;
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arraydcl(Symbol **sympp;)
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: IDENTIFIER { *sympp = s = yylval.Sptr; }
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'('
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INTVALUE
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{
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s->dimlimit[s->dimensions]=ival;
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s->dimensions++;
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}
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[ ','
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INTVALUE
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{
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if(s->dimensions<MAXDIMENSIONS) {
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s->dimlimit[s->dimensions]=ival;
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s->dimensions++;
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} else error("too many dimensions");
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}
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]* ;
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fieldstmt { int intv; }
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: FIELDSYM cross intvalue(&intv)
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{ setchannel(ival); }
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',' fieldlist { notyetimpl(); }
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;
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fieldlist { int intv; int var; }
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: intvalue(&intv) ASSYM variable(&var)
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[ ',' intvalue(&intv) ASSYM variable(&var) ]*
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;
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forstmt { int exp; }
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: FORSYM IDENTIFIER { forinit(yylval.Sptr); }
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'=' expression(&exp) { forexpr(exp); }
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TOSYM expression(&exp) { forlimit(exp); }
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step
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;
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step { int exp; }
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: STEPSYM expression(&exp) { forstep(exp); }
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| /*EMPTY*/ {
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C_loc((arith) 1);
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forstep(INTTYPE);
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}
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;
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nextstmt: [ IDENTIFIER { nextstmt(yylval.Sptr); }
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| /* empty */ { nextstmt((Symbol *)0); }
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]
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[ ',' IDENTIFIER { nextstmt(yylval.Sptr); }
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]*
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;
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getstmt { char *cp; int intv; }
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: getput(&cp)
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[ /* empty */
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{ C_loc((arith) 0);
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C_cal(cp);
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C_asp((arith) BEMINTSIZE);
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}
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| ',' intvalue(&intv)
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{ C_loc((arith) ival);
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C_cal(cp);
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C_asp((arith) BEMINTSIZE);
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}
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]
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;
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getput(char **cpp;) { int intv; }
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: GETSYM cross intvalue(&intv)
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{ setchannel(ival);
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*cpp = "$_getrec";
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}
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| PUTSYM cross intvalue(&intv)
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{ setchannel(ival);
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*cpp = "$_putsym";
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}
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;
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gosubstmt: GOSUBSYM INTVALUE { gosubstmt(ival); }
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;
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returnstmt: RETURNSYM { returnstmt(); }
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;
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ifstmt { int exp; int d1; }
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: IFSYM expression(&exp) { d1=ifstmt(exp); }
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thenpart { d1=thenpart(d1); }
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elsepart { elsepart(d1); }
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;
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thenpart: THENSYM [ INTVALUE { gotostmt(ival); }
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| stmts
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]
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| GOTOSYM INTVALUE { gotostmt(ival); }
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;
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elsepart: %prefer ELSESYM
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[ INTVALUE { gotostmt(ival); }
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| stmts
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]
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| /* empty */
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;
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inputstmt { int intv; }
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: INPUTSYM [ semiprompt readlist
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| '#' intvalue(&intv)
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{ setchannel(ival); }
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',' readlist
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]
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;
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semiprompt { int str; }
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: semi STRVALUE { str = yylval.integer; }
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[ ';' { loadstr(str);
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prompt(1);
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}
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| ',' { loadstr(str);
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prompt(0);
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}
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]
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| /*EMPTY*/
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{ setchannel(-1);
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C_cal("_qstmark");
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}
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;
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semi : ';'
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| /* empty */
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;
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letstmt { int var; int exp; }
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: LETSYM
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variable(&var) { save_address(); }
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'=' expression(&exp) { assign(var,exp); }
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variable(&var) { save_address(); }
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'=' expression(&exp) { assign(var,exp); }
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;
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lineinputstmt { int var; int intv; }
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: LINESYM
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[ INPUTSYM
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semiprompt { setchannel(-1); }
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variable(&var) { linestmt(var); }
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| '#'
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intvalue(&intv) { setchannel(ival); }
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','
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variable(&var) { linestmt(var); }
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]
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;
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readlist: readelm
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[ ',' readelm ]*
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;
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readelm { int var; }
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: variable(&var) { readelm(var); }
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;
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lsetstmt { int var; int exp; }
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: LSETSYM variable(&var) '=' expression(&exp)
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{ notyetimpl(); }
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;
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midstmt { int exp; }
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: MIDSYM '$' midparms '=' expression(&exp)
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{ C_cal("_midstmt");
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C_asp((arith) (2*BEMINTSIZE + 2*BEMPTRSIZE));
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}
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;
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midparms: '(' midfirst midsec midthird ')'
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;
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midfirst { int exp; }
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: expression(&exp) { conversion(exp,STRINGTYPE); }
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;
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midsec { int exp; }
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: ',' expression(&exp) { conversion(exp,INTTYPE); }
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;
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midthird { int exp; }
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: ',' expression(&exp) { conversion(exp,INTTYPE); }
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| /* empty */ { C_loc((arith) -1); }
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;
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onstmt : ONSYM
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[ exceptionstmt
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| ongotostmt
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]
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;
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exceptionstmt: ERRORSYM GOTOSYM INTVALUE { exceptstmt(ival); }
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;
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ongotostmt { int exp; }
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: expression(&exp)
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[ GOSUBSYM constantlist { ongosubstmt(exp); }
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| GOTOSYM constantlist { ongotostmt(exp); }
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]
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;
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constantlist: INTVALUE { jumpelm(ival); }
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[ ',' INTVALUE { jumpelm(ival); }
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]*
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;
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openstmt { int exp; }
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: OPENSYM mode openchannel expression(&exp)
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{ conversion(exp,STRINGTYPE); }
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[ /* empty */ { openstmt(0); }
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| INTVALUE { openstmt(ival); }
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]
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;
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openchannel: cross INTVALUE ',' { setchannel(ival); }
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;
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mode { int exp; }
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: expression(&exp) ',' { conversion(exp,STRINGTYPE); }
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| ',' { C_lae_dnam("_iomode",(arith)0); }
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;
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optionstmt { int intv; }
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: OPTIONSYM BASESYM intvalue(&intv) { optionbase(ival); }
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;
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printstmt { int plist; }
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: PRINTSYM
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[ /* empty */ { setchannel(-1);
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C_cal("_nl");
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}
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| file format printlist(&plist)
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{ if(plist)
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C_cal("_nl");
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}
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]
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;
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file { int intv; }
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: '#' intvalue(&intv) ',' { setchannel(ival); }
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| /* empty */ { setchannel(-1); }
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;
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format { int var ; }
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: USINGSYM
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[ STRVALUE { loadstr(yylval.integer); } ';'
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| variable(&var) ';'
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{ if(var!=STRINGTYPE)
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error("string variable expected");
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}
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]
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| /* empty */ { formatstring=0; }
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;
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printlist(int *ip;) { int exp; }
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: [ expression(&exp) { printstmt(exp); *ip=1; }
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| ',' { zone(1); *ip=0; }
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| ';' { zone(0); *ip=0; }
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]+
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;
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pokestmt { int exp1; int exp2 ; }
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: POKESYM
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expression(&exp1)
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','
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expression(&exp2) { pokestmt(exp1,exp2); }
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;
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randomizestmt { int exp; }
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: RANDOMIZESYM
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[ /* empty */ { C_cal("_randomi"); }
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| expression(&exp)
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{ conversion(exp,INTTYPE);
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C_cal("_setrand");
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C_asp((arith) BEMINTSIZE);
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}
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]
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;
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readstmt { int var; }
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: READSYM { setchannel(0); }
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variable(&var) { readelm(var); }
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[ ',' variable(&var) { readelm(var); }
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]*
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;
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restorestmt : RESTORESYM
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[ INTVALUE { restore(ival); }
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| /* empty */ { restore(0); }
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]
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;
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swapstmt { int var1; int var2; }
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: SWAPSYM
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variable(&var1)
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','
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variable(&var2) { swapstmt(var1,var2); }
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;
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whilestmt { int exp; }
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: WHILESYM { whilestart(); }
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expression(&exp) { whiletst(exp); }
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;
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wendstmt : WENDSYM { wend(); }
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;
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writestmt: WRITESYM
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[ /* empty */ { setchannel(-1);
|
|
C_cal("_wrnl");
|
|
}
|
|
| file writelist { C_cal("_wrnl"); }
|
|
]
|
|
;
|
|
|
|
writelist { int exp; }
|
|
: expression(&exp) { writestmt(exp,0); }
|
|
[ ',' expression(&exp) { writestmt(exp,1); }
|
|
]*
|
|
;
|
|
|
|
cross: '#' | /* empty */ ;
|
|
|
|
intvalue(int *ip;)
|
|
: INTVALUE { *ip = yylval.integer; }
|
|
;
|
|
|
|
variable(int *ip;) { Symbol *symp; int exp; }
|
|
: identifier(&symp)
|
|
[ %avoid /* empty */ { *ip = loadaddr(symp); }
|
|
| '(' { newarrayload(symp); }
|
|
expression(&exp) { loadarray(exp); }
|
|
[ ',' expression(&exp) { loadarray(exp); } ]*
|
|
')' { *ip = endarrayload(); }
|
|
]
|
|
| ERRSYM { C_lae_dnam("_errsym",(arith) 0);
|
|
*ip = INTTYPE;
|
|
}
|
|
| ERLSYM { C_lae_dnam("_erlsym",(arith) 0);
|
|
*ip = INTTYPE;
|
|
}
|
|
;
|
|
|
|
expression(int *ip;) { int neg; } /* NIEUW */
|
|
: expression1(&neg) { *ip = neg; }
|
|
[
|
|
IMPSYM
|
|
expression(&neg) { *ip = boolop(*ip,neg,IMPSYM); }
|
|
]?
|
|
;
|
|
|
|
|
|
expression1(int *ip;) { int neg; }
|
|
: expression2(&neg) { *ip = neg; }
|
|
[ EQVSYM
|
|
expression2(&neg) { *ip = boolop(*ip,neg,EQVSYM); }
|
|
]*
|
|
;
|
|
|
|
expression2(int *ip;) { int neg; }
|
|
: expression3(&neg) { *ip = neg; }
|
|
[ XORSYM
|
|
expression3(&neg) { *ip = boolop(*ip,neg,XORSYM); }
|
|
]*
|
|
;
|
|
|
|
expression3(int *ip;) { int neg; }
|
|
: expression4(&neg) { *ip = neg; }
|
|
[ ORSYM
|
|
expression4(&neg) { *ip = boolop(*ip,neg,ORSYM); }
|
|
]*
|
|
;
|
|
|
|
expression4(int *ip;) { int neg; }
|
|
: negation(&neg) { *ip = neg; }
|
|
[ ANDSYM
|
|
negation(&neg) { *ip = boolop(*ip,neg,ANDSYM); }
|
|
]*
|
|
;
|
|
|
|
negation(int *ip;) { int comp; }
|
|
: NOTSYM compare(&comp) { *ip=boolop(comp,0,NOTSYM); }
|
|
| compare(ip)
|
|
;
|
|
|
|
compare(int *ip;) { int sum1,sum2,rel; }
|
|
: sum(&sum1)
|
|
[ /* empty */ { *ip = sum1; }
|
|
| RELOP { rel=yylval.integer; }
|
|
sum(&sum2) { *ip=relop(sum1,sum2,rel); }
|
|
| '=' sum(&sum2) { *ip=relop(sum1,sum2,'='); }
|
|
]
|
|
;
|
|
|
|
sum(int *ip;) { int term1; }
|
|
: term(&term1) { *ip = term1; }
|
|
[ %while(1)
|
|
'-' term(&term1) { *ip=plusmin(*ip,term1,'-'); }
|
|
| '+' term(&term1) { *ip=plusmin(*ip,term1,'+'); }
|
|
]*
|
|
;
|
|
|
|
term(int *ip;) { int fac1; }
|
|
: factor(&fac1) { *ip = fac1; }
|
|
[ '*' factor(&fac1) { *ip=muldiv(*ip,fac1,'*'); }
|
|
| '\\' factor(&fac1) { *ip=muldiv(*ip,fac1,'\\'); }
|
|
| '/' factor(&fac1) { *ip=muldiv(*ip,fac1,'/'); }
|
|
| MODSYM factor(&fac1) { *ip=muldiv(*ip,fac1,MODSYM); }
|
|
]*
|
|
;
|
|
|
|
factor(int *ip;)
|
|
: '-' factor(ip) { *ip=negate(*ip); }
|
|
| factor1(ip)
|
|
;
|
|
|
|
factor1(int *ip;) { int mant,exp; }
|
|
: factor2(&mant)
|
|
[ /* empty */ { *ip = mant; }
|
|
| '^' factor1(&exp) { *ip = power(mant,exp); }
|
|
]
|
|
;
|
|
|
|
factor2(int *ip;)
|
|
{ int var,func,expl,funcc,exp,intv,funcn,inpt; int typetable[10]; }
|
|
: INTVALUE { *ip=loadint(ival); }
|
|
| '(' expression(&exp) ')' { *ip=exp; }
|
|
| FLTVALUE { *ip=loaddbl(dval); }
|
|
| STRVALUE
|
|
{ *ip= STRINGTYPE;
|
|
loadstr(yylval.integer);
|
|
}
|
|
| variable(&var)
|
|
{ *ip=var;
|
|
loadvar(var);
|
|
}
|
|
| INKEYSYM '$' { C_cal("_inkey");
|
|
C_lfr((arith) BEMPTRSIZE);
|
|
*ip= STRINGTYPE;
|
|
}
|
|
| VARPTR '(' '#' intvalue(&intv) ')'
|
|
{ warning("Not supported");
|
|
*ip=INTTYPE;
|
|
}
|
|
| FUNCTION { func=yylval.integer; }
|
|
[ %avoid /* empty */ { *ip= callfcn(yylval.integer,0, typetable); }
|
|
| '(' cross exprlist(&expl, typetable) ')'
|
|
{ *ip=callfcn(func,expl, typetable); }
|
|
]
|
|
| funcname(&funcn)
|
|
[ %avoid /* empty */ { *ip=fcnend(0); }
|
|
| funccall(&funcc) ')' { *ip=fcnend(funcc); }
|
|
]
|
|
| MIDSYM '$' midparms
|
|
{
|
|
C_cal("_mid");
|
|
C_asp((arith) (2*BEMINTSIZE+BEMPTRSIZE));
|
|
C_lfr((arith) BEMPTRSIZE);
|
|
*ip= STRINGTYPE;
|
|
}
|
|
| INPUTSYM '$' '(' expression(&exp) inputtail(&inpt)
|
|
{ /*waar worden inpt en exp gebruikt?*/
|
|
C_cal("_inpfcn");
|
|
C_asp((arith) (2*BEMINTSIZE+BEMPTRSIZE));
|
|
*ip= STRINGTYPE;
|
|
}
|
|
;
|
|
|
|
inputtail(int *ip;) { int exp; }
|
|
: ',' cross expression(&exp) ')'
|
|
{ conversion(exp,INTTYPE);
|
|
*ip= INTTYPE;
|
|
}
|
|
| ')'
|
|
{ C_loc((arith) -1);
|
|
*ip= INTTYPE;
|
|
}
|
|
;
|
|
|
|
funcname(int *ip;)
|
|
: FUNCTID { *ip=fcncall(yylval.Sptr); }
|
|
;
|
|
|
|
funccall(int *ip;) { int exp; }
|
|
: '(' expression(&exp) { callparm(0,exp);*ip=1; }
|
|
[ ',' expression(&exp) { callparm(*ip,exp);
|
|
*ip = *ip+1;
|
|
}
|
|
]*
|
|
;
|
|
|
|
identifier(Symbol **ident;)
|
|
: IDENTIFIER { dcltype(yylval.Sptr);
|
|
*ident=yylval.Sptr;
|
|
}
|
|
;
|
|
|
|
exprlist(int *ip; int *typetable;) { int exp; }
|
|
: expression(&exp) { typetable[0]=exp;
|
|
*ip=1;
|
|
}
|
|
[ ',' expression(&exp) { typetable[*ip]=exp;
|
|
*ip = *ip+1;
|
|
}
|
|
]*
|
|
;
|
|
|
|
{
|
|
#ifndef NORCSID
|
|
static char rcs_id[] = "$Header$" ;
|
|
#endif
|
|
}
|