Boston, MA 02111-1307, USA. */
#include "system.h"
+#include "quotearg.h"
#include "files.h"
+#include "symtab.h"
#include "gram.h"
#include "LR0.h"
#include "lalr.h"
static graph_t graph;
static FILE *fgraph = NULL;
-/* This part will construct the label of nodes. */
+
+/*----------------------------.
+| Construct the node labels. |
+`----------------------------*/
+
static void
-print_core (state_t *state, struct obstack *node_obstack)
+print_core (struct obstack *oout, state_t *state)
{
int i;
- short *sitems = state->items;
- int snitems = state->nitems;
+ item_number_t *sitems = state->items;
+ int snritems = state->nitems;
/* Output all the items of a state, not only its kernel. */
- closure (sitems, snitems);
- sitems = itemset;
- snitems = nitemset;
+ if (trace_flag)
+ {
+ closure (sitems, snritems);
+ sitems = itemset;
+ snritems = nritemset;
+ }
- obstack_fgrow1 (node_obstack, "%2d: ", state->number);
- for (i = 0; i < snitems; i++)
+ obstack_fgrow1 (oout, "state %2d\n", state->number);
+ for (i = 0; i < snritems; i++)
{
- short *sp;
- short *sp1;
+ item_number_t *sp;
+ item_number_t *sp1;
int rule;
sp1 = sp = ritem + sitems[i];
- while (*sp > 0)
+ while (*sp >= 0)
sp++;
rule = -(*sp);
if (i)
- obstack_sgrow (node_obstack, "\n ");
- obstack_fgrow1 (node_obstack, " %s -> ",
- tags[rule_table[rule].lhs]);
+ obstack_1grow (oout, '\n');
+ obstack_fgrow1 (oout, " %s -> ",
+ symbol_tag_get (rules[rule].lhs));
- for (sp = ritem + rule_table[rule].rhs; sp < sp1; sp++)
- obstack_fgrow1 (node_obstack, "%s ", tags[*sp]);
+ for (sp = rules[rule].rhs; sp < sp1; sp++)
+ obstack_fgrow1 (oout, "%s ", symbol_tag_get (symbols[*sp]));
- obstack_1grow (node_obstack, '.');
+ obstack_1grow (oout, '.');
- for (/* Nothing */; *sp > 0; ++sp)
- obstack_fgrow1 (node_obstack, " %s", tags[*sp]);
+ for (/* Nothing */; *sp >= 0; ++sp)
+ obstack_fgrow1 (oout, " %s", symbol_tag_get (symbols[*sp]));
+
+ /* Experimental feature: display the lookaheads. */
+ if (trace_flag && state->nlookaheads)
+ {
+ int j, k;
+ int nlookaheads = 0;
+ /* Look for lookaheads corresponding to this rule. */
+ for (j = 0; j < state->nlookaheads; ++j)
+ for (k = 0; k < ntokens; ++k)
+ if (bitset_test (state->lookaheads[j], k)
+ && state->lookaheads_rule[j]->number == rule)
+ nlookaheads++;
+ if (nlookaheads)
+ {
+ obstack_sgrow (oout, " [");
+ for (j = 0; j < state->nlookaheads; ++j)
+ for (k = 0; k < ntokens; ++k)
+ if (bitset_test (state->lookaheads[j], k)
+ && state->lookaheads_rule[j]->number == rule)
+ obstack_fgrow2 (oout, "%s%s",
+ symbol_tag_get (symbols[k]),
+ --nlookaheads ? ", " : "");
+ obstack_sgrow (oout, "]");
+ }
+ }
}
}
{
int i;
- shifts *shiftp = state->shifts;
+ shifts_t *shiftp = state->shifts;
reductions *redp = state->reductions;
-#if 0
- errs *errp = state->errs;
-#endif
static char buff[10];
edge_t edge;
if (!shiftp->nshifts && !redp)
- {
-#if 0
- if (final_state == state)
- obstack_sgrow (node_obstack, "$default: accept");
- else
- obstack_sgrow (node_obstack, "NO ACTIONS");
-#endif
- return;
- }
+ return;
for (i = 0; i < shiftp->nshifts; i++)
if (!SHIFT_IS_DISABLED (shiftp, i))
{
- int state1 = shiftp->shifts[i];
- int symbol = state_table[state1]->accessing_symbol;
+ state_number_t state1 = shiftp->shifts[i];
+ symbol_number_t symbol = states[state1]->accessing_symbol;
new_edge (&edge);
edge.sourcename = node_name;
sprintf (buff, "%d", state1);
edge.targetname = buff;
- /* Shifts are blue, gotos are red. */
- edge.color = SHIFT_IS_SHIFT(shiftp, i) ? blue : red;
- edge.label = tags[symbol];
+ /* Shifts are blue, gotos are green, and error is red. */
+ if (SHIFT_IS_ERROR (shiftp, i))
+ edge.color = red;
+ else
+ edge.color = SHIFT_IS_SHIFT(shiftp, i) ? blue : green;
+ edge.label = symbol_tag_get (symbols[symbol]);
output_edge (&edge, fgraph);
close_edge (fgraph);
}
-
-#if 0
- if (errp)
- {
- int j, nerrs;
-
- nerrs = errp->nerrs;
-
- for (j = 0; j < nerrs; j++)
- {
- if (!errp->errs[j])
- continue;
- symbol = errp->errs[j];
- /* If something has been added in the NODE_OBSTACK after
- the declaration of the label, then we need a `\n'.
- if (obstack_object_size (node_obstack) > node_output_size)
- obstack_sgrow (node_obstack, "\n");
- */
- obstack_fgrow1 (node_obstack, _("%-4s\terror (nonassociative)"),
- tags[symbol]);
- }
- if (j > 0)
- obstack_1grow (node_obstack, '\n');
- }
-
- if (state->consistent && redp)
- {
- rule = redp->rules[0];
- symbol = rule_table[rule].lhs;
- /*
- if (obstack_object_size (node_obstack) > node_output_size)
- obstack_sgrow (node_obstack, "\n");
- */
- obstack_fgrow2 (node_obstack, _("$default\treduce using rule %d (%s)"),
- rule, tags[symbol]);
- }
-#endif
}
new_node (&node);
sprintf (name, "%d", state->number);
node.title = name;
- print_core (state, &node_obstack);
+ print_core (&node_obstack, state);
obstack_1grow (&node_obstack, '\0');
node.label = obstack_finish (&node_obstack);
void
print_graph (void)
{
- int i;
+ state_number_t i;
/* Output file. */
fgraph = xfopen (spec_graph_file, "w");
output_graph (&graph, fgraph);
/* Output nodes and edges. */
- new_closure (nitems);
+ new_closure (nritems);
for (i = 0; i < nstates; i++)
- print_state (state_table[i]);
+ print_state (states[i]);
free_closure ();
/* Close graph. */
projects / bison.git / blobdiff