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"
#include "getargs.h"
#include "state.h"
#include "reader.h"
+#include "closure.h"
#include "obstack.h"
#include "print_graph.h"
#include "vcg.h"
-#include "quotearg.h"
static graph_t graph;
static FILE *fgraph = NULL;
-static size_t node_output_size = 0;
-/* Return an unambiguous printable representated, allocated in slot 0,
- for NAME, suitable for C strings. */
-static char const *
-quote (char const *name)
-{
- return quotearg_n_style (0, escape_quoting_style, name);
-}
+/*----------------------------.
+| Construct the node labels. |
+`----------------------------*/
-/* This part will construct the label of nodes. */
static void
-print_core (int state, struct obstack *node_obstack)
+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;
+ item_number_t *sitems = state->items;
+ int snritems = state->nitems;
- if (k == 0)
- return;
+ /* Output all the items of a state, not only its kernel. */
+ if (trace_flag)
+ {
+ closure (sitems, snritems);
+ sitems = itemset;
+ snritems = nritemset;
+ }
- for (i = 0; i < k; i++)
+ obstack_fgrow1 (oout, "state %2d\n", state->number);
+ for (i = 0; i < snritems; i++)
{
- if (i)
- obstack_sgrow (node_obstack, "\\n");
+ item_number_t *sp;
+ item_number_t *sp1;
+ int rule;
- sp1 = sp = ritem + statep->items[i];
+ sp1 = sp = ritem + sitems[i];
- while (*sp > 0)
+ while (*sp >= 0)
sp++;
rule = -(*sp);
- obstack_fgrow1 (node_obstack, "%d: ", rule);
- obstack_fgrow1 (node_obstack, " %s -> ", quote (tags[rlhs[rule]]));
+ if (i)
+ obstack_1grow (oout, '\n');
+ obstack_fgrow1 (oout, " %s -> ",
+ symbol_tag_get (rules[rule].lhs));
+
+ for (sp = rules[rule].rhs; sp < sp1; sp++)
+ obstack_fgrow1 (oout, "%s ", symbol_tag_get (symbols[*sp]));
- for (sp = ritem + rrhs[rule]; sp < sp1; sp++)
- obstack_fgrow1 (node_obstack, "%s ", quote (tags[*sp]));
+ obstack_1grow (oout, '.');
- obstack_1grow (node_obstack, '.');
+ for (/* Nothing */; *sp >= 0; ++sp)
+ obstack_fgrow1 (oout, " %s", symbol_tag_get (symbols[*sp]));
- while (*sp > 0)
- obstack_fgrow1 (node_obstack, " %s", quote (tags[*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, "]");
+ }
+ }
}
}
-/* Output in graph_obstack edges specifications in incidence with current
- node. */
+
+/*---------------------------------------------------------------.
+| Output in graph_obstack edges specifications in incidence with |
+| current node. |
+`---------------------------------------------------------------*/
+
static void
-print_actions (int state, const char *node_name, struct obstack *node_obstack)
+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)
- obstack_sgrow (node_obstack, "$default: accept");
- else
- obstack_sgrow (node_obstack, "NO ACTIONS");
- return;
- }
-
- if (shiftp)
- {
- k = shiftp->nshifts;
-
- for (i = 0; i < k; i++)
- {
- if (!shiftp->shifts[i])
- continue;
- state1 = shiftp->shifts[i];
- symbol = accessing_symbol[state1];
-
- if (ISVAR (symbol))
- break;
-
- {
- new_edge (&edge);
-
- if (state > state1)
- edge.type = back_edge;
- open_edge (&edge, fgraph);
- /* The edge source is the current node. */
- edge.sourcename = node_name;
- sprintf (buff, "%d", state1);
- edge.targetname = buff;
- edge.color = (symbol == 0) ? red : blue;
- /* FIXME: Be aware that quote uses static memory. The string
- must be output immediately (which is the case here). */
- edge.label = tags[symbol] ? quote (tags[symbol]) : NULL;
- output_edge (&edge, fgraph);
- close_edge (fgraph);
- }
- }
- }
- else
- {
- i = 0;
- k = 0;
- }
-
- if (errp)
- {
- int j, nerrs;
- nerrs = errp->nerrs;
+ shifts_t *shiftp = state->shifts;
+ reductions *redp = state->reductions;
- for (j = 0; j < nerrs; j++)
- {
- if (!errp->errs[j])
- continue;
- symbol = errp->errs[j];
- /* If something has been added in the NODE_OBSTACK after
- the declaration of the label, then we need a `\n'. */
- if (obstack_object_size (node_obstack) > node_output_size)
- obstack_sgrow (node_obstack, "\\n");
- obstack_fgrow1 (node_obstack, _("%-4s\terror (nonassociative)"),
- tags[symbol]);
- }
- if (j > 0)
- obstack_sgrow (node_obstack, "\\n");
- }
+ static char buff[10];
+ edge_t edge;
- if (consistent[state] && redp)
- {
- rule = redp->rules[0];
- symbol = rlhs[rule];
- if (obstack_object_size (node_obstack) > node_output_size)
- obstack_sgrow (node_obstack, "\\n");
- obstack_fgrow2 (node_obstack, _("$default\treduce using rule %d (%s)"),
- rule, tags[symbol]);
- }
+ if (!shiftp->nshifts && !redp)
+ return;
- 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, fgraph);
- edge.sourcename = node_name;
- sprintf (buff, "%d", state1);
- edge.targetname = buff;
+ for (i = 0; i < shiftp->nshifts; i++)
+ if (!SHIFT_IS_DISABLED (shiftp, i))
+ {
+ state_number_t state1 = shiftp->shifts[i];
+ symbol_number_t symbol = states[state1]->accessing_symbol;
+
+ new_edge (&edge);
+
+ if (state->number > state1)
+ edge.type = back_edge;
+ open_edge (&edge, fgraph);
+ /* The edge source is the current node. */
+ edge.sourcename = node_name;
+ sprintf (buff, "%d", state1);
+ edge.targetname = buff;
+ /* Shifts are blue, gotos are green, and error is red. */
+ if (SHIFT_IS_ERROR (shiftp, i))
edge.color = red;
- edge.label = tags[symbol] ? quote (tags[symbol]) : NULL;
- output_edge (&edge, fgraph);
- close_edge (fgraph);
- }
- }
+ else
+ edge.color = SHIFT_IS_SHIFT(shiftp, i) ? blue : green;
+ edge.label = symbol_tag_get (symbols[symbol]);
+ output_edge (&edge, fgraph);
+ close_edge (fgraph);
+ }
}
-/* Output in GRAPH_OBSTACK the current node specifications and edges
- which go out from that node. */
+
+/*-------------------------------------------------------------.
+| 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];
struct obstack node_obstack;
node_t node;
+ /* The labels of the nodes are their the items. */
obstack_init (&node_obstack);
- new_node (&node); /* Set node attributs default value. */
- sprintf (name, "%d", state);
- node.title = name; /* Give a name to the node. */
-
- {
- /* Here we begin to compute the node label. */
- obstack_sgrow (&node_obstack, "\t\tlabel:\t\""); /* Open Label */
-
- /* Keep the size of NODE_OBSTACK before computing the label. It is
- useful to format the label. */
- node_output_size = obstack_object_size (&node_obstack);
-
- /* Compute the labels of nodes on the fly. */
- print_core (state, &node_obstack);
- /* Compute edges and additionnal parts of node label. */
- print_actions (state, node.title, &node_obstack);
-
- obstack_sgrow (&node_obstack, "\"\n"); /* Close Label. */
- }
+ new_node (&node);
+ 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 a VCG formatted attributs list. */
output_node (&node, fgraph);
- /* Save the node label. */
- fwrite (obstack_base (&node_obstack),
- obstack_object_size (&node_obstack), 1, 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");
#if 0
graph.smanhattan_edges = yes;
- graph.manhattan_edges = yes;
+ graph.manhattan_edges = yes;
#endif
graph.display_edge_labels = yes;
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, fgraph);
projects / bison.git / blobdiff