-/* Output a VCG description on generated parser, for bison,
- Copyright 1984, 1986, 1989, 2000, 2001 Free Software Foundation, Inc.
+/* Output a VCG description on generated parser, for Bison,
+ Copyright 2001 Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
Boston, MA 02111-1307, USA. */
#include "system.h"
-#include "xalloc.h"
+#include "quotearg.h"
#include "files.h"
+#include "symtab.h"
#include "gram.h"
#include "LR0.h"
#include "lalr.h"
#include "getargs.h"
#include "state.h"
#include "reader.h"
+#include "closure.h"
#include "obstack.h"
#include "print_graph.h"
#include "vcg.h"
static graph_t graph;
+static FILE *fgraph = NULL;
+
+
+/*----------------------------.
+| Construct the node labels. |
+`----------------------------*/
-/* This part will construct the label of nodes. */
static void
-print_core (int state)
+print_core (struct obstack *oout, state_t *state)
{
int i;
- int k;
- int rule;
- core *statep;
- short *sp;
- short *sp1;
-
- statep = state_table[state];
- k = statep->nitems;
-
- if (k == 0)
- return;
-
- obstack_sgrow(&graph_obstack, "\t\tlabel:\t\"");
+ item_number_t *sitems = state->items;
+ int snritems = state->nitems;
- for (i = 0; i < k; i++)
+ /* Output all the items of a state, not only its kernel. */
+ if (report_flag & report_itemsets)
{
- sp1 = sp = ritem + statep->items[i];
+ closure (sitems, snritems);
+ sitems = itemset;
+ snritems = nritemset;
+ }
+
+ obstack_fgrow1 (oout, "state %2d\n", state->number);
+ for (i = 0; i < snritems; i++)
+ {
+ item_number_t *sp;
+ item_number_t *sp1;
+ rule_number_t rule;
+
+ sp1 = sp = ritem + sitems[i];
- while (*sp > 0)
+ while (*sp >= 0)
sp++;
- rule = -(*sp);
+ rule = item_number_as_rule_number (*sp);
- obstack_fgrow1(&graph_obstack, _("%d: "), rule);
- obstack_fgrow1(&graph_obstack, " %s -> ", tags[rlhs[rule]]);
+ if (i)
+ obstack_1grow (oout, '\n');
+ obstack_fgrow1 (oout, " %s -> ",
+ rules[rule].lhs->tag);
- for (sp = ritem + rrhs[rule]; sp < sp1; sp++)
- obstack_fgrow1(&graph_obstack, "%s ", tags[*sp]);
+ for (sp = rules[rule].rhs; sp < sp1; sp++)
+ obstack_fgrow1 (oout, "%s ", symbols[*sp]->tag);
- obstack_1grow(&graph_obstack, '.');
-
- while (*sp > 0)
- obstack_fgrow1(&graph_obstack, " %s", tags[*sp++]);
-
- obstack_sgrow(&graph_obstack, "\\n");
+ obstack_1grow (oout, '.');
+
+ for (/* Nothing */; *sp >= 0; ++sp)
+ obstack_fgrow1 (oout, " %s", symbols[*sp]->tag);
+
+ /* Experimental feature: display the lookaheads. */
+ if (report_flag & report_lookaheads)
+ {
+ /* Find the reduction we are handling. */
+ reductions_t *reds = state->reductions;
+ int redno = state_reduction_find (state, &rules[rule]);
+
+ /* Print them if there are. */
+ if (reds->lookaheads && redno != -1)
+ {
+ bitset_iterator biter;
+ int k;
+ int not_first = 0;
+ obstack_sgrow (oout, "[");
+ BITSET_FOR_EACH (biter, reds->lookaheads[redno], k, 0)
+ obstack_fgrow2 (oout, "%s%s",
+ not_first++ ? ", " : "",
+ symbols[k]->tag);
+ obstack_sgrow (oout, "]");
+ }
+ }
}
- obstack_sgrow(&graph_obstack, "\"\n");
}
+
+/*---------------------------------------------------------------.
+| Output in graph_obstack edges specifications in incidence with |
+| current node. |
+`---------------------------------------------------------------*/
+
static void
-print_actions (int state, node_t *node)
+print_actions (state_t *state, const char *node_name)
{
int i;
- int k;
- int state1;
- int symbol;
- shifts *shiftp;
- errs *errp;
- reductions *redp;
- int rule;
- static char buff[10];
- edge_t edge;
-
- shiftp = shift_table[state];
- redp = reduction_table[state];
- errp = err_table[state];
- if (!shiftp && !redp)
- {
- if (final_state == state)
- ;//fprintf(f, " $default\taccept\n");
- else
- ;//fprintf(f, " NO ACTIONS\n");
- return;
- }
+ transitions_t *transitions = state->transitions;
+ reductions_t *redp = state->reductions;
- if (shiftp)
- {
- k = shiftp->nshifts;
-
- for (i = 0; i < k; i++)
- {
- if (!shiftp->shifts[i])
- continue;
- state1 = shiftp->shifts[i];
- symbol = accessing_symbol[state1];
-
- if (ISVAR (symbol))
- break;
-
- {
- new_edge (&edge);
-
- if (state > state1)
- edge.type = back_edge;
- open_edge (&edge, &graph_obstack);
- edge.sourcename = node->title;
- edge.targetname = buff;
- sprintf (edge.targetname, "%d", state1);
- edge.color = (symbol == 0) ? blue : red;
- edge.label = tags[symbol];
- output_edge (&edge, &graph_obstack);
- close_edge (&graph_obstack);
- }
- }
- }
- else
- {
- i = 0;
- k = 0;
- }
-
- if (errp)
- {
- int j, nerrs;
+ static char buff[10];
+ edge_t edge;
- nerrs = errp->nerrs;
+ if (!transitions->num && !redp)
+ return;
- for (j = 0; j < nerrs; j++)
- {
- if (!errp->errs[j])
- continue;
- symbol = errp->errs[j];
- }
- }
-
- if (consistent[state] && redp)
- {
- rule = redp->rules[0];
- symbol = rlhs[rule];
- }
-
- if (i < k)
- {
- for (; i < k; i++)
- {
- if (!shiftp->shifts[i])
- continue;
- state1 = shiftp->shifts[i];
- symbol = accessing_symbol[state1];
-
- new_edge (&edge);
- open_edge (&edge, &graph_obstack);
- edge.sourcename = node->title;
- edge.targetname = buff;
+ for (i = 0; i < transitions->num; i++)
+ if (!TRANSITION_IS_DISABLED (transitions, i))
+ {
+ state_t *state1 = transitions->states[i];
+ symbol_number_t symbol = state1->accessing_symbol;
+
+ new_edge (&edge);
+
+ if (state->number > state1->number)
+ edge.type = back_edge;
+ open_edge (&edge, fgraph);
+ /* The edge source is the current node. */
+ edge.sourcename = node_name;
+ sprintf (buff, "%d", state1->number);
+ edge.targetname = buff;
+ /* Shifts are blue, gotos are green, and error is red. */
+ if (TRANSITION_IS_ERROR (transitions, i))
edge.color = red;
- sprintf (edge.targetname, "%d", state1);
- edge.label = tags[symbol];
- output_edge (&edge, &graph_obstack);
- close_edge (&graph_obstack);
- }
- }
+ else
+ edge.color = TRANSITION_IS_SHIFT(transitions, i) ? blue : green;
+ edge.label = symbols[symbol]->tag;
+ output_edge (&edge, fgraph);
+ close_edge (fgraph);
+ }
}
+
+/*-------------------------------------------------------------.
+| Output in FGRAPH the current node specifications and exiting |
+| edges. |
+`-------------------------------------------------------------*/
+
static void
-print_state (int state)
+print_state (state_t *state)
{
static char name[10];
- node_t node;
+ struct obstack node_obstack;
+ node_t node;
+ /* The labels of the nodes are their the items. */
+ obstack_init (&node_obstack);
new_node (&node);
- open_node (&graph_obstack);
-
- sprintf(name, "%d", state);
- node.title = name;
- output_node (&node, &graph_obstack);
-
- print_core (state); /* node label */
-
- close_node (&graph_obstack);
-
- print_actions (state, &node); /* edges */
+ sprintf (name, "%d", state->number);
+ node.title = name;
+ print_core (&node_obstack, state);
+ obstack_1grow (&node_obstack, '\0');
+ node.label = obstack_finish (&node_obstack);
+
+ open_node (fgraph);
+ output_node (&node, fgraph);
+ close_node (fgraph);
+
+ /* Output the edges. */
+ print_actions (state, name);
+
+ obstack_free (&node_obstack, 0);
}
\f
void
print_graph (void)
{
- int i;
-
- if (!graph_flag)
- return ;
+ state_number_t i;
+
+ /* Output file. */
+ fgraph = xfopen (spec_graph_file, "w");
+
new_graph (&graph);
-
- /* graph.smanhattan_edges = yes;
- graph.manhattan_edges = yes; */
-
+
+#if 0
+ graph.smanhattan_edges = yes;
+ graph.manhattan_edges = yes;
+#endif
+
graph.display_edge_labels = yes;
- graph.layoutalgorithm = 0;
-
+ graph.layoutalgorithm = normal;
+
graph.port_sharing = no;
graph.finetuning = yes;
graph.straight_phase = yes;
graph.priority_phase = yes;
graph.splines = yes;
-
+
graph.crossing_weight = median;
/* Output graph options. */
- open_graph (&graph_obstack);
- output_graph (&graph, &graph_obstack);
+ open_graph (fgraph);
+ output_graph (&graph, fgraph);
+ /* Output nodes and edges. */
+ new_closure (nritems);
for (i = 0; i < nstates; i++)
- /* Output nodes & edges. */
- print_state (i);
+ print_state (states[i]);
+ free_closure ();
/* Close graph. */
- close_graph (&graph, &graph_obstack);
+ close_graph (&graph, fgraph);
+ xfclose (fgraph);
}
-
projects / bison.git / blobdiff