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Overview
| Comment: | Fix for ticket #134: Change the lemon.c sources to work around a problem with the AIX C compiler. (CVS 715) |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
07f6020bb56d6d1bffdd936017f61cfa |
| User & Date: | drh 2002-08-14 23:18:57 |
Context
|
2002-08-15
| ||
| 01:26 | Fixes and test improvements resulting from code coverage testing. (CVS 716) (check-in: 66a0f6a8 user: drh tags: trunk) | |
|
2002-08-14
| ||
| 23:18 | Fix for ticket #134: Change the lemon.c sources to work around a problem with the AIX C compiler. (CVS 715) (check-in: 07f6020b user: drh tags: trunk) | |
| 12:56 | Implement probabilistic reader/writer locks under windows so that windows can have multiple simultaneous readers. (CVS 714) (check-in: 2127de3f user: drh tags: trunk) | |
Changes
Changes to tool/lemon.c.
113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 ... 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 ... 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 ... 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 .... 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 .... 3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 3631 3632 3633 3634 3635 |
#define SetFind(X,Y) (X[Y]) /* True if Y is in set X */
/********** From the file "struct.h" *************************************/
/*
** Principal data structures for the LEMON parser generator.
*/
typedef enum {FALSE=0, TRUE} Boolean;
/* Symbols (terminals and nonterminals) of the grammar are stored
** in the following: */
struct symbol {
char *name; /* Name of the symbol */
int index; /* Index number for this symbol */
enum {
................................................................................
struct lemon *lemp;
{
int i;
struct rule *rp;
int progress;
for(i=0; i<lemp->nsymbol; i++){
lemp->symbols[i]->lambda = FALSE;
}
for(i=lemp->nterminal; i<lemp->nsymbol; i++){
lemp->symbols[i]->firstset = SetNew();
}
/* First compute all lambdas */
do{
progress = 0;
for(rp=lemp->rule; rp; rp=rp->next){
if( rp->lhs->lambda ) continue;
for(i=0; i<rp->nrhs; i++){
if( rp->rhs[i]->lambda==FALSE ) break;
}
if( i==rp->nrhs ){
rp->lhs->lambda = TRUE;
progress = 1;
}
}
}while( progress );
/* Now compute all first sets */
do{
................................................................................
s1 = rp->lhs;
for(i=0; i<rp->nrhs; i++){
s2 = rp->rhs[i];
if( s2->type==TERMINAL ){
progress += SetAdd(s1->firstset,s2->index);
break;
}else if( s1==s2 ){
if( s1->lambda==FALSE ) break;
}else{
progress += SetUnion(s1->firstset,s2->firstset);
if( s2->lambda==FALSE ) break;
}
}
}
}while( progress );
return;
}
................................................................................
** Figure out which one should be used */
lemp->nconflict += resolve_conflict(ap,nap,lemp->errsym);
}
}
}
/* Report an error for each rule that can never be reduced. */
for(rp=lemp->rule; rp; rp=rp->next) rp->canReduce = FALSE;
for(i=0; i<lemp->nstate; i++){
struct action *ap;
for(ap=lemp->sorted[i]->ap; ap; ap=ap->next){
if( ap->type==REDUCE ) ap->x.rp->canReduce = TRUE;
}
}
for(rp=lemp->rule; rp; rp=rp->next){
if( rp->canReduce ) continue;
ErrorMsg(lemp->filename,rp->ruleline,"This rule can not be reduced.\n");
lemp->errorcnt++;
}
................................................................................
for(i=dot+1; i<rp->nrhs; i++){
xsp = rp->rhs[i];
if( xsp->type==TERMINAL ){
SetAdd(newcfp->fws,xsp->index);
break;
}else{
SetUnion(newcfp->fws,xsp->firstset);
if( xsp->lambda==FALSE ) break;
}
}
if( i==rp->nrhs ) Plink_add(&cfp->fplp,newcfp);
}
}
}
return;
................................................................................
sp->name = Strsafe(x);
sp->type = isupper(*x) ? TERMINAL : NONTERMINAL;
sp->rule = 0;
sp->fallback = 0;
sp->prec = -1;
sp->assoc = UNK;
sp->firstset = 0;
sp->lambda = FALSE;
sp->destructor = 0;
sp->datatype = 0;
Symbol_insert(sp,sp->name);
}
return sp;
}
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113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 ... 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 ... 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 ... 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 .... 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 .... 3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 3631 3632 3633 3634 3635 |
#define SetFind(X,Y) (X[Y]) /* True if Y is in set X */
/********** From the file "struct.h" *************************************/
/*
** Principal data structures for the LEMON parser generator.
*/
typedef enum {B_FALSE=0, B_TRUE} Boolean;
/* Symbols (terminals and nonterminals) of the grammar are stored
** in the following: */
struct symbol {
char *name; /* Name of the symbol */
int index; /* Index number for this symbol */
enum {
................................................................................
struct lemon *lemp;
{
int i;
struct rule *rp;
int progress;
for(i=0; i<lemp->nsymbol; i++){
lemp->symbols[i]->lambda = B_FALSE;
}
for(i=lemp->nterminal; i<lemp->nsymbol; i++){
lemp->symbols[i]->firstset = SetNew();
}
/* First compute all lambdas */
do{
progress = 0;
for(rp=lemp->rule; rp; rp=rp->next){
if( rp->lhs->lambda ) continue;
for(i=0; i<rp->nrhs; i++){
if( rp->rhs[i]->lambda==B_FALSE ) break;
}
if( i==rp->nrhs ){
rp->lhs->lambda = B_TRUE;
progress = 1;
}
}
}while( progress );
/* Now compute all first sets */
do{
................................................................................
s1 = rp->lhs;
for(i=0; i<rp->nrhs; i++){
s2 = rp->rhs[i];
if( s2->type==TERMINAL ){
progress += SetAdd(s1->firstset,s2->index);
break;
}else if( s1==s2 ){
if( s1->lambda==B_FALSE ) break;
}else{
progress += SetUnion(s1->firstset,s2->firstset);
if( s2->lambda==B_FALSE ) break;
}
}
}
}while( progress );
return;
}
................................................................................
** Figure out which one should be used */
lemp->nconflict += resolve_conflict(ap,nap,lemp->errsym);
}
}
}
/* Report an error for each rule that can never be reduced. */
for(rp=lemp->rule; rp; rp=rp->next) rp->canReduce = B_FALSE;
for(i=0; i<lemp->nstate; i++){
struct action *ap;
for(ap=lemp->sorted[i]->ap; ap; ap=ap->next){
if( ap->type==REDUCE ) ap->x.rp->canReduce = B_TRUE;
}
}
for(rp=lemp->rule; rp; rp=rp->next){
if( rp->canReduce ) continue;
ErrorMsg(lemp->filename,rp->ruleline,"This rule can not be reduced.\n");
lemp->errorcnt++;
}
................................................................................
for(i=dot+1; i<rp->nrhs; i++){
xsp = rp->rhs[i];
if( xsp->type==TERMINAL ){
SetAdd(newcfp->fws,xsp->index);
break;
}else{
SetUnion(newcfp->fws,xsp->firstset);
if( xsp->lambda==B_FALSE ) break;
}
}
if( i==rp->nrhs ) Plink_add(&cfp->fplp,newcfp);
}
}
}
return;
................................................................................
sp->name = Strsafe(x);
sp->type = isupper(*x) ? TERMINAL : NONTERMINAL;
sp->rule = 0;
sp->fallback = 0;
sp->prec = -1;
sp->assoc = UNK;
sp->firstset = 0;
sp->lambda = B_FALSE;
sp->destructor = 0;
sp->datatype = 0;
Symbol_insert(sp,sp->name);
}
return sp;
}
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