395 lines
7.8 KiB
Plaintext
395 lines
7.8 KiB
Plaintext
spec: dcl
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| common
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| external
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| intrinsic
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| equivalence
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| data
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| implicit
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| namelist
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| SSAVE
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{ NO66("SAVE statement");
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saveall = YES; }
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| SSAVE savelist
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{ NO66("SAVE statement"); }
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| SFORMAT
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{ fmtstmt(thislabel); setfmt(thislabel); }
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| SPARAM in_dcl SLPAR paramlist SRPAR
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{ NO66("PARAMETER statement"); }
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;
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dcl: type opt_comma name in_dcl new_dcl dims lengspec
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{ settype($3, $1, $7);
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if(ndim>0) setbound($3,ndim,dims);
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}
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| dcl SCOMMA name dims lengspec
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{ settype($3, $1, $5);
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if(ndim>0) setbound($3,ndim,dims);
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}
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| dcl SSLASHD datainit vallist SSLASHD
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{ if (new_dcl == 2) {
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err("attempt to give DATA in type-declaration");
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new_dcl = 1;
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}
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}
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;
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new_dcl: { new_dcl = 2; } ;
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type: typespec lengspec
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{ varleng = $2; }
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;
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typespec: typename
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{ varleng = ($1<0 || ONEOF($1,M(TYLOGICAL)|M(TYLONG))
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? 0 : typesize[$1]);
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vartype = $1; }
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;
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typename: SINTEGER { $$ = TYLONG; }
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| SREAL { $$ = tyreal; }
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| SCOMPLEX { ++complex_seen; $$ = tycomplex; }
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| SDOUBLE { $$ = TYDREAL; }
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| SDCOMPLEX { ++dcomplex_seen; NOEXT("DOUBLE COMPLEX statement"); $$ = TYDCOMPLEX; }
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| SLOGICAL { $$ = TYLOGICAL; }
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| SCHARACTER { NO66("CHARACTER statement"); $$ = TYCHAR; }
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| SUNDEFINED { $$ = TYUNKNOWN; }
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| SDIMENSION { $$ = TYUNKNOWN; }
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| SAUTOMATIC { NOEXT("AUTOMATIC statement"); $$ = - STGAUTO; }
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| SSTATIC { NOEXT("STATIC statement"); $$ = - STGBSS; }
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;
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lengspec:
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{ $$ = varleng; }
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| SSTAR intonlyon expr intonlyoff
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{
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expptr p;
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p = $3;
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NO66("length specification *n");
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if( ! ISICON(p) || p->constblock.Const.ci <= 0 )
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{
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$$ = 0;
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dclerr("length must be a positive integer constant",
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NPNULL);
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}
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else {
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if (vartype == TYCHAR)
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$$ = p->constblock.Const.ci;
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else switch((int)p->constblock.Const.ci) {
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case 1: $$ = 1; break;
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case 2: $$ = typesize[TYSHORT]; break;
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case 4: $$ = typesize[TYLONG]; break;
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case 8: $$ = typesize[TYDREAL]; break;
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case 16: $$ = typesize[TYDCOMPLEX]; break;
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default:
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dclerr("invalid length",NPNULL);
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$$ = varleng;
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}
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}
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}
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| SSTAR intonlyon SLPAR SSTAR SRPAR intonlyoff
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{ NO66("length specification *(*)"); $$ = -1; }
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;
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common: SCOMMON in_dcl var
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{ incomm( $$ = comblock("") , $3 ); }
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| SCOMMON in_dcl comblock var
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{ $$ = $3; incomm($3, $4); }
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| common opt_comma comblock opt_comma var
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{ $$ = $3; incomm($3, $5); }
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| common SCOMMA var
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{ incomm($1, $3); }
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;
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comblock: SCONCAT
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{ $$ = comblock(""); }
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| SSLASH SNAME SSLASH
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{ $$ = comblock(token); }
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;
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external: SEXTERNAL in_dcl name
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{ setext($3); }
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| external SCOMMA name
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{ setext($3); }
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;
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intrinsic: SINTRINSIC in_dcl name
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{ NO66("INTRINSIC statement"); setintr($3); }
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| intrinsic SCOMMA name
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{ setintr($3); }
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;
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equivalence: SEQUIV in_dcl equivset
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| equivalence SCOMMA equivset
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;
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equivset: SLPAR equivlist SRPAR
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{
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struct Equivblock *p;
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if(nequiv >= maxequiv)
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many("equivalences", 'q', maxequiv);
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p = & eqvclass[nequiv++];
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p->eqvinit = NO;
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p->eqvbottom = 0;
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p->eqvtop = 0;
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p->equivs = $2;
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}
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;
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equivlist: lhs
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{ $$=ALLOC(Eqvchain);
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$$->eqvitem.eqvlhs = (struct Primblock *)$1;
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}
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| equivlist SCOMMA lhs
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{ $$=ALLOC(Eqvchain);
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$$->eqvitem.eqvlhs = (struct Primblock *) $3;
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$$->eqvnextp = $1;
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}
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;
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data: SDATA in_data datalist
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| data opt_comma datalist
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;
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in_data:
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{ if(parstate == OUTSIDE)
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{
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newproc();
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startproc(ESNULL, CLMAIN);
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}
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if(parstate < INDATA)
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{
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enddcl();
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parstate = INDATA;
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datagripe = 1;
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}
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}
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;
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datalist: datainit datavarlist SSLASH datapop vallist SSLASH
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{ ftnint junk;
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if(nextdata(&junk) != NULL)
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err("too few initializers");
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frdata($2);
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frrpl();
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}
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;
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datainit: /* nothing */ { frchain(&datastack); curdtp = 0; } ;
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datapop: /* nothing */ { pop_datastack(); } ;
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vallist: { toomanyinit = NO; } val
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| vallist SCOMMA val
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;
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val: value
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{ dataval(ENULL, $1); }
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| simple SSTAR value
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{ dataval($1, $3); }
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;
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value: simple
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| addop simple
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{ if( $1==OPMINUS && ISCONST($2) )
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consnegop((Constp)$2);
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$$ = $2;
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}
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| complex_const
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;
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savelist: saveitem
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| savelist SCOMMA saveitem
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;
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saveitem: name
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{ int k;
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$1->vsave = YES;
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k = $1->vstg;
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if( ! ONEOF(k, M(STGUNKNOWN)|M(STGBSS)|M(STGINIT)) )
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dclerr("can only save static variables", $1);
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}
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| comblock
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;
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paramlist: paramitem
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| paramlist SCOMMA paramitem
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;
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paramitem: name SEQUALS expr
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{ if($1->vclass == CLUNKNOWN)
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make_param((struct Paramblock *)$1, $3);
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else dclerr("cannot make into parameter", $1);
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}
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;
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var: name dims
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{ if(ndim>0) setbound($1, ndim, dims); }
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;
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datavar: lhs
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{ Namep np;
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np = ( (struct Primblock *) $1) -> namep;
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vardcl(np);
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if(np->vstg == STGCOMMON)
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extsymtab[np->vardesc.varno].extinit = YES;
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else if(np->vstg==STGEQUIV)
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eqvclass[np->vardesc.varno].eqvinit = YES;
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else if(np->vstg!=STGINIT && np->vstg!=STGBSS)
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dclerr("inconsistent storage classes", np);
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$$ = mkchain((char *)$1, CHNULL);
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}
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| SLPAR datavarlist SCOMMA dospec SRPAR
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{ chainp p; struct Impldoblock *q;
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pop_datastack();
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q = ALLOC(Impldoblock);
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q->tag = TIMPLDO;
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(q->varnp = (Namep) ($4->datap))->vimpldovar = 1;
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p = $4->nextp;
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if(p) { q->implb = (expptr)(p->datap); p = p->nextp; }
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if(p) { q->impub = (expptr)(p->datap); p = p->nextp; }
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if(p) { q->impstep = (expptr)(p->datap); }
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frchain( & ($4) );
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$$ = mkchain((char *)q, CHNULL);
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q->datalist = hookup($2, $$);
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}
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;
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datavarlist: datavar
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{ if (!datastack)
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curdtp = 0;
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datastack = mkchain((char *)curdtp, datastack);
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curdtp = $1; curdtelt = 0;
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}
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| datavarlist SCOMMA datavar
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{ $$ = hookup($1, $3); }
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;
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dims:
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{ ndim = 0; }
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| SLPAR dimlist SRPAR
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;
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dimlist: { ndim = 0; } dim
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| dimlist SCOMMA dim
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;
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dim: ubound
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{
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if(ndim == maxdim)
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err("too many dimensions");
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else if(ndim < maxdim)
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{ dims[ndim].lb = 0;
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dims[ndim].ub = $1;
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}
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++ndim;
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}
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| expr SCOLON ubound
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{
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if(ndim == maxdim)
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err("too many dimensions");
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else if(ndim < maxdim)
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{ dims[ndim].lb = $1;
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dims[ndim].ub = $3;
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}
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++ndim;
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}
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;
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ubound: SSTAR
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{ $$ = 0; }
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| expr
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;
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labellist: label
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{ nstars = 1; labarray[0] = $1; }
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| labellist SCOMMA label
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{ if(nstars < maxlablist) labarray[nstars++] = $3; }
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;
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label: SICON
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{ $$ = execlab( convci(toklen, token) ); }
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;
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implicit: SIMPLICIT in_dcl implist
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{ NO66("IMPLICIT statement"); }
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| implicit SCOMMA implist
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;
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implist: imptype SLPAR letgroups SRPAR
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| imptype
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{ if (vartype != TYUNKNOWN)
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dclerr("-- expected letter range",NPNULL);
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setimpl(vartype, varleng, 'a', 'z'); }
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;
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imptype: { needkwd = 1; } type
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/* { vartype = $2; } */
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;
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letgroups: letgroup
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| letgroups SCOMMA letgroup
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;
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letgroup: letter
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{ setimpl(vartype, varleng, $1, $1); }
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| letter SMINUS letter
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{ setimpl(vartype, varleng, $1, $3); }
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;
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letter: SNAME
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{ if(toklen!=1 || token[0]<'a' || token[0]>'z')
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{
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dclerr("implicit item must be single letter", NPNULL);
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$$ = 0;
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}
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else $$ = token[0];
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}
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;
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namelist: SNAMELIST
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| namelist namelistentry
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;
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namelistentry: SSLASH name SSLASH namelistlist
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{
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if($2->vclass == CLUNKNOWN)
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{
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$2->vclass = CLNAMELIST;
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$2->vtype = TYINT;
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$2->vstg = STGBSS;
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$2->varxptr.namelist = $4;
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$2->vardesc.varno = ++lastvarno;
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}
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else dclerr("cannot be a namelist name", $2);
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}
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;
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namelistlist: name
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{ $$ = mkchain((char *)$1, CHNULL); }
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| namelistlist SCOMMA name
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{ $$ = hookup($1, mkchain((char *)$3, CHNULL)); }
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;
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in_dcl:
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{ switch(parstate)
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{
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case OUTSIDE: newproc();
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startproc(ESNULL, CLMAIN);
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case INSIDE: parstate = INDCL;
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case INDCL: break;
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case INDATA:
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if (datagripe) {
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errstr(
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"Statement order error: declaration after DATA",
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CNULL);
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datagripe = 0;
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}
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break;
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default:
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dclerr("declaration among executables", NPNULL);
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}
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}
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;
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