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Guido van Rossum 1997-04-29 21:03:06 +00:00
parent 2b713b2f67
commit 86bea46b3d
18 changed files with 218 additions and 205 deletions
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24
Parser/firstsets.c
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@ -35,10 +35,10 @@ PERFORMANCE OF THIS SOFTWARE.
#include "grammar.h"
#include "token.h"
extern int debugging;
extern int Py_DebugFlag;
/* Forward */
static void calcfirstset PROTO((grammar *, dfa *));
static void calcfirstset Py_PROTO((grammar *, dfa *));
void
addfirstsets(g)
@ -72,7 +72,7 @@ calcfirstset(g, d)
dfa *d1;
label *l0;
if (debugging)
if (Py_DebugFlag)
printf("Calculate FIRST set for '%s'\n", d->d_name);
if (dummy == NULL)
@ -91,9 +91,9 @@ calcfirstset(g, d)
nbits = g->g_ll.ll_nlabels;
result = newbitset(nbits);
sym = NEW(int, 1);
sym = PyMem_NEW(int, 1);
if (sym == NULL)
fatal("no mem for new sym in calcfirstset");
Py_FatalError("no mem for new sym in calcfirstset");
nsyms = 1;
sym[0] = findlabel(&g->g_ll, d->d_type, (char *)NULL);
@ -105,13 +105,14 @@ calcfirstset(g, d)
break;
}
if (j >= nsyms) { /* New label */
RESIZE(sym, int, nsyms + 1);
PyMem_RESIZE(sym, int, nsyms + 1);
if (sym == NULL)
fatal("no mem to resize sym in calcfirstset");
Py_FatalError(
"no mem to resize sym in calcfirstset");
sym[nsyms++] = a->a_lbl;
type = l0[a->a_lbl].lb_type;
if (ISNONTERMINAL(type)) {
d1 = finddfa(g, type);
d1 = PyGrammar_FindDFA(g, type);
if (d1->d_first == dummy) {
fprintf(stderr,
"Left-recursion below '%s'\n",
@ -120,7 +121,8 @@ calcfirstset(g, d)
else {
if (d1->d_first == NULL)
calcfirstset(g, d1);
mergebitset(result, d1->d_first, nbits);
mergebitset(result,
d1->d_first, nbits);
}
}
else if (ISTERMINAL(type)) {
@ -129,11 +131,11 @@ calcfirstset(g, d)
}
}
d->d_first = result;
if (debugging) {
if (Py_DebugFlag) {
printf("FIRST set for '%s': {", d->d_name);
for (i = 0; i < nbits; i++) {
if (testbit(result, i))
printf(" %s", labelrepr(&l0[i]));
printf(" %s", PyGrammar_LabelRepr(&l0[i]));
}
printf(" }\n");
}