/*------------- check if resolvers are legal --------------------*/
static void
CcSyntax_CheckRes(CcSyntax_t * self, CcNode_t * p, CcsBool_t rslvAllowed)
{
CcNode_t * q;
CcBitArray_t expected, soFar, fs, fsNext;
CcSymbolTable_t * symtab = &self->globals->symtab;
while (p != NULL) {
if (p->base.type == node_alt) {
CcBitArray(&expected, symtab->terminals.Count);
for (q = p; q != NULL; q = q->down) {
CcSyntax_Expected0(self, &fs, q->sub, self->curSy);
CcBitArray_Or(&expected, &fs);
CcBitArray_Destruct(&fs);
}
CcBitArray(&soFar, symtab->terminals.Count);
for (q = p; q != NULL; q = q->down) {
if (q->sub->base.type == node_rslv) {
CcSyntax_Expected(self, &fs, q->sub->next, self->curSy);
if (CcBitArray_Intersect(&fs, &soFar))
CcsErrorPool_Warning(self->globals->errpool, NULL,
"Resolver will never be evaluated. "
"Place it at previous conflicting alternative.");
if (!CcBitArray_Intersect(&fs, &expected))
CcsErrorPool_Warning(self->globals->errpool, NULL,
"Misplaced resolver: no LL(1) conflict.");
CcBitArray_Destruct(&fs);
} else {
CcSyntax_Expected(self, &fs, q->sub, self->curSy);
CcBitArray_Or(&soFar, &fs);
CcBitArray_Destruct(&fs);
}
CcSyntax_CheckRes(self, q->sub, TRUE);
}
CcBitArray_Destruct(&expected); CcBitArray_Destruct(&soFar);
} else if (p->base.type == node_iter || p->base.type == node_opt) {
if (p->sub->base.type == node_rslv) {
CcSyntax_First(self, &fs, p->sub->next);
CcSyntax_Expected(self, &fsNext, p->next, self->curSy);
if (!CcBitArray_Intersect(&fs, &fsNext))
CcsErrorPool_Warning(self->globals->errpool, NULL,
"Misplaced resolver: no LL(1) conflict.");
}
CcSyntax_CheckRes(self, p->sub, TRUE);
} else if (p->base.type == node_rslv) {
if (!rslvAllowed)
CcsErrorPool_Warning(self->globals->errpool, NULL,
"Misplaced resolver: no alternative.");
}
if (p->up) break;
p = p->next;
rslvAllowed = FALSE;
}
}
static CcsBool_t
SCSOS_UseSwitch(CcCSharpBaseOutputScheme_t * self, CcNode_t * p)
{
CcBitArray_t s1, s2; int nAlts;
CcSyntax_t * syntax = &self->base.globals->syntax;
CcArrayList_t * terminals = &self->base.globals->symtab.terminals;
if (p->base.type != node_alt) return FALSE;
nAlts = 0;
CcBitArray(&s1, terminals->Count);
while (p != NULL) {
CcSyntax_Expected0(syntax, &s2, p->sub, self->curSy);
if (CcBitArray_Intersect(&s1, &s2)) goto falsequit2;
CcBitArray_Or(&s1, &s2);
CcBitArray_Destruct(&s2);
++nAlts;
if (p->sub->base.type == node_rslv) goto falsequit1;
p = p->down;
}
CcBitArray_Destruct(&s1);
return nAlts > 5;
falsequit2:
CcBitArray_Destruct(&s2);
falsequit1:
CcBitArray_Destruct(&s1);
return FALSE;
}
void
CcSyntax_Expected(CcSyntax_t * self, CcBitArray_t * ret,
CcNode_t * p, const CcSymbol_t * curSy)
{
CcSyntax_First(self, ret, p);
if (CcNode_DelGraph(p))
CcBitArray_Or(ret, ((const CcSymbolNT_t *)curSy)->follow);
}
static void
CcSyntax_FindAS(CcSyntax_t * self, CcNode_t * p)
{
CcNode_t * a, * q;
CcBitArray_t s0, s1;
CcSymbolTable_t * symtab = &self->globals->symtab;
while (p != NULL) {
if (p->base.type == node_opt || p->base.type == node_iter) {
CcSyntax_FindAS(self, p->sub);
a = CcSyntax_LeadingAny(self, p->sub);
if (a != NULL) {
CcSyntax_First(self, &s0, p->next);
CcBitArray_Subtract(((CcNodeANY_t *)a)->set, &s0);
CcBitArray_Destruct(&s0);
}
} else if (p->base.type == node_alt) {
CcBitArray(&s1, symtab->terminals.Count);
q = p;
while (q != NULL) {
CcSyntax_FindAS(self, q->sub);
a = CcSyntax_LeadingAny(self, q->sub);
if (a != NULL) {
CcSyntax_First(self, &s0, q->down);
CcBitArray_Or(&s0, &s1);
CcBitArray_Subtract(((CcNodeANY_t *)a)->set, &s0);
CcBitArray_Destruct(&s0);
} else {
CcSyntax_First(self, &s0, q->sub);
CcBitArray_Or(&s1, &s0);
CcBitArray_Destruct(&s0);
}
q = q->down;
}
CcBitArray_Destruct(&s1);
}
if (p->up) break;
p = p->next;
}
}
static void
ATest(FILE * fp, CcBitArray_t * ba0, CcBitArray_t * ba1)
{
CcBitArray_t ba2;
int idx, cnt, numbits = CcBitArray_getCount(ba0);
CcBitArray_Dump(ba0, fp, "BitArray 0: ", "\n");
CcBitArray_Dump(ba1, fp, "BitArray 1: ", "\n");
cnt = 0;
for (idx = 0; idx < numbits; ++idx)
if (CcBitArray_Get(ba0, idx) && CcBitArray_Get(ba1, idx)) cnt = 1;
COCO_ASSERT((CcBitArray_Intersect(ba0, ba1) == cnt));
COCO_ASSERT((CcBitArray_Clone(&ba2, ba0)));
COCO_ASSERT((CcBitArray_Equal(ba0, &ba2)));
cnt = 0;
for (idx = 0; idx < numbits; ++idx) {
COCO_ASSERT(CcBitArray_Get(ba0, idx) == CcBitArray_Get(&ba2, idx));
if (CcBitArray_Get(ba0, idx)) ++cnt;
}
COCO_ASSERT((CcBitArray_Elements(ba0) == cnt));
COCO_ASSERT((CcBitArray_Or(&ba2, ba1) == 0));
CcBitArray_Dump(&ba2, fp, "Or: ", "\n");
for (idx = 0; idx < numbits; ++idx)
COCO_ASSERT((CcBitArray_Get(ba0, idx) || CcBitArray_Get(ba1, idx)) == CcBitArray_Get(&ba2, idx));
CcBitArray_Destruct(&ba2);
COCO_ASSERT((CcBitArray_Clone(&ba2, ba0)));
COCO_ASSERT((CcBitArray_And(&ba2, ba1) == 0));
CcBitArray_Dump(&ba2, fp, "And: ", "\n");
for (idx = 0; idx < numbits; ++idx)
COCO_ASSERT((CcBitArray_Get(ba0, idx) && CcBitArray_Get(ba1, idx)) == CcBitArray_Get(&ba2, idx));
CcBitArray_Destruct(&ba2);
COCO_ASSERT((CcBitArray_Clone(&ba2, ba0)));
CcBitArray_Subtract(&ba2, ba1);
CcBitArray_Dump(&ba2, fp, "Subtract: ", "\n");
for (idx = 0; idx < numbits; ++idx)
COCO_ASSERT((CcBitArray_Get(ba0, idx) && !CcBitArray_Get(ba1, idx)) == CcBitArray_Get(&ba2, idx));
COCO_ASSERT(!CcBitArray_Intersect(ba1, &ba2));
CcBitArray_Destruct(&ba2);
fprintf(fp, "\n");
}
static void
CcSyntax_Complete(CcSyntax_t * self, CcSymbolNT_t * sym)
{
CcSymbolNT_t * s; CcArrayListIter_t iter;
CcSymbolTable_t * symtab = &self->globals->symtab;
CcArrayList_t * ntarr = &symtab->nonterminals;
if (CcBitArray_Get(self->visited, sym->base.kind)) return;
CcBitArray_Set(self->visited, sym->base.kind, TRUE);
for (s = (CcSymbolNT_t *)CcArrayList_First(ntarr, &iter);
s; s = (CcSymbolNT_t *)CcArrayList_Next(ntarr, &iter)) {
if (CcBitArray_Get(sym->nts, s->base.kind)) {
CcSyntax_Complete(self, s);
CcBitArray_Or(sym->follow, s->follow);
if ((CcSymbol_t *)sym == self->curSy)
CcBitArray_Set(sym->nts, s->base.kind, FALSE);
}
}
}
/* FIX ME */
static void
CcSyntax_CheckAlts(CcSyntax_t * self, CcNode_t * p)
{
CcBitArray_t s1, s2; CcNode_t * q;
CcSymbolTable_t * symtab = &self->globals->symtab;
while (p != NULL) {
if (p->base.type == node_alt) {
q = p;
CcBitArray(&s1, symtab->terminals.Count);
while (q != NULL) { /* For all alternatives */
CcSyntax_Expected0(self, &s2, q->sub, self->curSy);
CcSyntax_CheckOverlap(self, &s1, &s2, 1);
CcBitArray_Or(&s1, &s2);
CcSyntax_CheckAlts(self, q->sub);
q = q->down;
CcBitArray_Destruct(&s2);
}
CcBitArray_Destruct(&s1);
} else if (p->base.type == node_opt || p->base.type == node_iter) {
/* E.g. [[...]] */
if (CcNode_DelSubGraph(p->sub)) {
CcSyntax_LL1Error(self, 4, NULL);
} else {
CcSyntax_Expected0(self, &s1, p->sub, self->curSy);
CcSyntax_Expected(self, &s2, p->next, self->curSy);
CcSyntax_CheckOverlap(self, &s1, &s2, 2);
CcSyntax_CheckAlts(self, p->sub);
CcBitArray_Destruct(&s1);
CcBitArray_Destruct(&s2);
}
} else if (p->base.type == node_any) {
/* E.g. {ANY} ANY or [ANY] ANY */
if (CcBitArray_Elements(((CcNodeANY_t *)p)->set) == 0)
CcSyntax_LL1Error(self, 3, NULL);
}
if (p->up) break;
p = p->next;
}
}
static void
CcSyntax_First0(CcSyntax_t * self, CcBitArray_t * ret,
CcNode_t * p, CcBitArray_t * mark)
{
CcBitArray_t fs0;
CcSymbolTable_t * symtab = &self->globals->symtab;
CcBitArray(ret, symtab->terminals.Count);
while (p != NULL && !CcBitArray_Get(mark, p->base.index)) {
CcBitArray_Set(mark, p->base.index, TRUE);
if (p->base.type == node_nt) {
CcNodeNT_t * p0 = (CcNodeNT_t *)p;
CcSymbolNT_t * sym = (CcSymbolNT_t *)p0->sym;
if (sym->firstReady) {
CcBitArray_Or(ret, sym->first);
} else {
CcSyntax_First0(self, &fs0, sym->graph, mark);
CcBitArray_Or(ret, &fs0);
CcBitArray_Destruct(&fs0);
}
} else if (p->base.type == node_t) {
CcNodeT_t * p0 = (CcNodeT_t *)p;
CcBitArray_Set(ret, p0->sym->kind, TRUE);
} else if (p->base.type == node_wt) {
CcNodeWT_t * p0 = (CcNodeWT_t *)p;
CcBitArray_Set(ret, p0->sym->kind, TRUE);
} else if (p->base.type == node_any) {
CcNodeANY_t * p0 = (CcNodeANY_t *)p;
CcBitArray_Or(ret, p0->set);
} else if (p->base.type == node_alt) {
CcSyntax_First0(self, &fs0, p->sub, mark);
CcBitArray_Or(ret, &fs0);
CcBitArray_Destruct(&fs0);
CcSyntax_First0(self, &fs0, p->down, mark);
CcBitArray_Or(ret, &fs0);
CcBitArray_Destruct(&fs0);
} else if (p->base.type == node_iter || p->base.type == node_opt) {
CcSyntax_First0(self, &fs0, p->sub, mark);
CcBitArray_Or(ret, &fs0);
CcBitArray_Destruct(&fs0);
}
if (!CcNode_DelNode(p)) break;
p = p->next;
}
}
static void
CcSyntax_CompSync(CcSyntax_t * self, CcNode_t * p)
{
CcNodeSYNC_t * syncp;
while (p != NULL && !CcBitArray_Get(self->visited, p->base.index)) {
CcBitArray_Set(self->visited, p->base.index, TRUE);
if (p->base.type == node_sync) {
syncp = (CcNodeSYNC_t *)p;
CcsAssert(syncp->set == NULL);
CcSyntax_Expected(self, &syncp->setSpace, p->next, self->curSy);
syncp->set = &syncp->setSpace;
CcBitArray_Set(syncp->set, self->eofSy->kind, TRUE);
CcBitArray_Or(self->allSyncSets, syncp->set);
} else if (p->base.type == node_alt) {
CcSyntax_CompSync(self, p->sub);
CcSyntax_CompSync(self, p->down);
} else if (p->base.type == node_opt || p->base.type == node_iter) {
CcSyntax_CompSync(self, p->sub);
}
p = p->next;
}
}
static void
CcSyntax_CompFollow(CcSyntax_t * self, CcNode_t * p)
{
CcBitArray_t s;
CcSymbolNT_t * sym;
while (p != NULL && !CcBitArray_Get(self->visited, p->base.index)) {
CcBitArray_Set(self->visited, p->base.index, TRUE);
if (p->base.type == node_nt) {
CcSyntax_First(self, &s, p->next);
sym = (CcSymbolNT_t *)((CcNodeNT_t *)p)->sym;
CcBitArray_Or(sym->follow, &s);
CcBitArray_Destruct(&s);
if (CcNode_DelGraph(p->next))
CcBitArray_Set(sym->nts, self->curSy->kind, TRUE);
} else if (p->base.type == node_opt || p->base.type == node_iter) {
CcSyntax_CompFollow(self, p->sub);
} else if (p->base.type == node_alt) {
CcSyntax_CompFollow(self, p->sub);
CcSyntax_CompFollow(self, p->down);
}
p = p->next;
}
}
static void
SCSOS_GenCode(CcCSharpBaseOutputScheme_t * self, CcOutput_t * output,
CcNode_t * p, const CcBitArray_t * IsChecked)
{
int err; CcsBool_t equal, useSwitch; int index;
CcNode_t * p2; CcBitArray_t s1, s2, isChecked;
CcNodeNT_t * pnt; CcNodeT_t * pt; CcNodeWT_t * pwt;
CcNodeSEM_t * psem; CcNodeSYNC_t * psync;
CcSyntax_t * syntax = &self->base.globals->syntax;
CcArrayList_t * terminals = &self->base.globals->symtab.terminals;
CcBitArray_Clone(&isChecked, IsChecked);
while (p != NULL) {
if (p->base.type == node_nt) {
pnt = (CcNodeNT_t *)p;
if (pnt->pos) {
CcPrintfIL(output, "%s(%s);", pnt->sym->name, pnt->pos->text);
} else {
CcPrintfIL(output, "%s();", pnt->sym->name);
}
} else if (p->base.type == node_t) {
pt = (CcNodeT_t *)p;
if (CcBitArray_Get(&isChecked, pt->sym->kind))
CcPrintfIL(output, "Get();");
else
CcPrintfIL(output, "Expect(%d);", pt->sym->kind);
} else if (p->base.type == node_wt) {
pwt = (CcNodeWT_t *)p;
CcSyntax_Expected(syntax, &s1, p->next, self->curSy);
CcBitArray_Or(&s1, syntax->allSyncSets);
CcPrintfIL(output, "ExpectWeak(%d, %d);",
pwt->sym->kind, CcSyntaxSymSet_New(&self->symSet, &s1));
CcBitArray_Destruct(&s1);
} else if (p->base.type == node_any) {
CcPrintfIL(output, "Get();");
} else if (p->base.type == node_eps) {
} else if (p->base.type == node_rslv) {
} else if (p->base.type == node_sem) {
psem = (CcNodeSEM_t *)p;
CcSource(output, psem->pos);
} else if (p->base.type == node_sync) {
psync = (CcNodeSYNC_t *)p;
err = CcSyntax_SyncError(syntax, self->curSy);
CcBitArray_Clone(&s1, psync->set);
SCSOS_GenCond(self, output, "while (!(", ")) {", &s1, p);
output->indent += 4;
CcPrintfIL(output, "SynErr(%d); Get();", err);
output->indent -= 4;
CcPrintfIL(output, "}");
CcBitArray_Destruct(&s1);
} else if (p->base.type == node_alt) {
CcSyntax_First(syntax, &s1, p);
equal = CcBitArray_Equal(&s1, &isChecked);
CcBitArray_Destruct(&s1);
useSwitch = SCSOS_UseSwitch(self, p);
if (useSwitch)
CcPrintfIL(output, "switch (la.kind) {");
p2 = p;
while (p2 != NULL) {
CcSyntax_Expected(syntax, &s1, p2->sub, self->curSy);
if (useSwitch) {
CcPrintfI(output, "");
for (index = 0; index < terminals->Count; ++index)
if (CcBitArray_Get(&s1, index))
CcPrintf(output, "case %d: ", index);
CcPrintfL(output,"{");
} else if (p2 == p) {
SCSOS_GenCond(self, output, "if (", ") {", &s1, p2->sub);
} else if (p2->down == NULL && equal) {
CcPrintfIL(output, "} else {");
} else {
SCSOS_GenCond(self, output,
"} else if (", ") {", &s1, p2->sub);
}
CcBitArray_Or(&s1, &isChecked);
output->indent += 4;
SCSOS_GenCode(self, output, p2->sub, &s1);
if (useSwitch) CcPrintfIL(output, "break;");
output->indent -= 4;
if (useSwitch) CcPrintfIL(output, "}");
p2 = p2->down;
CcBitArray_Destruct(&s1);
}
if (equal) {
CcPrintfIL(output, "}");
} else {
err = CcSyntax_AltError(syntax, self->curSy);
if (useSwitch) {
CcPrintfIL(output, "default: SynErr(%d); break;", err);
CcPrintfIL(output, "}");
} else {
CcPrintfIL(output, "} else SynErr(%d);", err);
}
}
} else if (p->base.type == node_iter) {
p2 = p->sub;
if (p2->base.type == node_wt) {
CcSyntax_Expected(syntax, &s1, p2->next, self->curSy);
CcSyntax_Expected(syntax, &s2, p->next, self->curSy);
CcPrintfIL(output,
"while (WeakSeparator(%d, %d, %d)) {",
((CcNodeWT_t *)p2)->sym->kind,
CcSyntaxSymSet_New(&self->symSet, &s1),
CcSyntaxSymSet_New(&self->symSet, &s2));
CcBitArray_Destruct(&s1); CcBitArray_Destruct(&s2);
CcBitArray(&s1, terminals->Count);
if (p2->up || p2->next == NULL) p2 = NULL; else p2 = p2->next;
} else {
CcSyntax_First(syntax, &s1, p2);
SCSOS_GenCond(self, output, "while (", ") {", &s1, p2);
}
output->indent += 4;
SCSOS_GenCode(self, output, p2, &s1);
output->indent -= 4;
CcPrintfIL(output, "}");
CcBitArray_Destruct(&s1);
} else if (p->base.type == node_opt) {
CcSyntax_First(syntax, &s1, p->sub);
SCSOS_GenCond(self, output, "if (", ") {", &s1, p->sub);
output->indent += 4;
SCSOS_GenCode(self, output, p->sub, &s1);
output->indent -= 4;
CcPrintfIL(output, "}");
CcBitArray_Destruct(&s1);
}
if (p->base.type != node_eps && p->base.type != node_sem &&
p->base.type != node_sync)
CcBitArray_SetAll(&isChecked, FALSE);
if (p->up) break;
p = p->next;
}
CcBitArray_Destruct(&isChecked);
}
