static grammar *
maketables(nfagrammar *gr)
{
int i;
nfa *nf;
dfa *d;
grammar *g;
if (gr->gr_nnfas == 0)
return NULL;
g = newgrammar(gr->gr_nfa[0]->nf_type);
/* XXX first rule must be start rule */
g->g_ll = gr->gr_ll;
for (i = 0; i < gr->gr_nnfas; i++) {
nf = gr->gr_nfa[i];
if (Py_DebugFlag) {
printf("Dump of NFA for '%s' ...\n", nf->nf_name);
dumpnfa(&gr->gr_ll, nf);
printf("Making DFA for '%s' ...\n", nf->nf_name);
}
d = adddfa(g, nf->nf_type, nf->nf_name);
makedfa(gr, gr->gr_nfa[i], d);
}
return g;
}
/*
** Convert value at index 'idx' to a pattern
*/
static TTree *getpatt (lua_State *L, int idx, int *len) {
TTree *tree;
switch (lua_type(L, idx)) {
case LUA_TSTRING: {
size_t slen;
const char *s = lua_tolstring(L, idx, &slen); /* get string */
if (slen == 0) /* empty? */
tree = newleaf(L, TTrue); /* always match */
else {
tree = newtree(L, 2 * (slen - 1) + 1);
fillseq(tree, TChar, slen, s); /* sequence of 'slen' chars */
}
break;
}
case LUA_TNUMBER: {
int n = lua_tointeger(L, idx);
tree = numtree(L, n);
break;
}
case LUA_TBOOLEAN: {
tree = (lua_toboolean(L, idx) ? newleaf(L, TTrue) : newleaf(L, TFalse));
break;
}
case LUA_TTABLE: {
tree = newgrammar(L, idx);
break;
}
case LUA_TFUNCTION: {
tree = newtree(L, 2);
tree->tag = TRunTime;
tree->key = addtonewktable(L, 0, idx);
sib1(tree)->tag = TTrue;
break;
}
default: {
return gettree(L, idx, len);
}
}
lua_replace(L, idx); /* put new tree into 'idx' slot */
if (len)
*len = getsize(L, idx);
return tree;
}