X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/08a946e0085372f0f05327877ce81e7d23483716..be3517b007a833ffec1735691f256f6a37e4a67f:/src/print_graph.c diff --git a/src/print_graph.c b/src/print_graph.c index ced951b0..f4742b16 100644 --- a/src/print_graph.c +++ b/src/print_graph.c @@ -1,80 +1,132 @@ -/* Output a VCG description on generated parser, for Bison, - Copyright 2001 Free Software Foundation, Inc. +/* Output a graph of the generated parser, for Bison. + + Copyright (C) 2001-2007, 2009-2012 Free Software Foundation, Inc. This file is part of Bison, the GNU Compiler Compiler. - Bison is free software; you can redistribute it and/or modify + This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2, or (at your option) - any later version. + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. - Bison is distributed in the hope that it will be useful, + This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License - along with Bison; see the file COPYING. If not, write to - the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ + along with this program. If not, see . */ +#include #include "system.h" -#include "files.h" -#include "gram.h" + #include "LR0.h" -#include "lalr.h" -#include "conflicts.h" +#include "closure.h" #include "complain.h" +#include "conflicts.h" +#include "files.h" #include "getargs.h" -#include "state.h" -#include "reader.h" -#include "obstack.h" +#include "gram.h" +#include "graphviz.h" +#include "lalr.h" #include "print_graph.h" -#include "vcg.h" +#include "reader.h" +#include "state.h" +#include "symtab.h" -static graph_t graph; -static FILE *fgraph = NULL; -/* This part will construct the label of nodes. */ -static void -print_core (int state, struct obstack *node_obstack) -{ - int i; - int k; - int rule; - core *statep; - short *sp; - short *sp1; +/*----------------------------. +| Construct the node labels. | +`----------------------------*/ - statep = state_table[state].state; - k = statep->nitems; +/* Print the lhs of a rule in such a manner that there is no vertical + repetition, like in *.output files. */ - if (k == 0) - return; - - for (i = 0; i < k; i++) +static void +print_lhs (struct obstack *oout, rule *previous_rule, rule *r) +{ + if (previous_rule && STREQ (previous_rule->lhs->tag, r->lhs->tag)) { - if (i) - obstack_1grow (node_obstack, '\n'); - - sp1 = sp = ritem + statep->items[i]; - - while (*sp > 0) - sp++; - - rule = -(*sp); - - obstack_fgrow1 (node_obstack, "%d: ", rule); - obstack_fgrow1 (node_obstack, " %s -> ", - tags[rule_table[rule].lhs]); + int i; + for (i = 0; i < strlen (r->lhs->tag); ++i) + obstack_1grow (oout, ' '); + obstack_1grow (oout, '|'); + } + else + { + obstack_sgrow (oout, escape (r->lhs->tag)); + obstack_1grow (oout, ':'); + } +} - for (sp = ritem + rule_table[rule].rhs; sp < sp1; sp++) - obstack_fgrow1 (node_obstack, "%s ", tags[*sp]); +static void +print_core (struct obstack *oout, state *s) +{ + item_number *sitems = s->items; + rule *previous_rule = NULL; + size_t i; + size_t snritems = s->nitems; - obstack_1grow (node_obstack, '.'); + /* Output all the items of a state, not only its kernel. */ + if (report_flag & report_itemsets) + { + closure (sitems, snritems); + sitems = itemset; + snritems = nitemset; + } - while (*sp > 0) - obstack_fgrow1 (node_obstack, " %s", tags[*sp++]); + obstack_printf (oout, _("State %d"), s->number); + obstack_sgrow (oout, "\\n\\l"); + for (i = 0; i < snritems; i++) + { + item_number *sp; + item_number *sp1; + rule_number r; + + sp1 = sp = ritem + sitems[i]; + + while (*sp >= 0) + sp++; + + r = item_number_as_rule_number (*sp); + + obstack_printf (oout, "%3d ", r); + print_lhs (oout, previous_rule, &rules[r]); + previous_rule = &rules[r]; + + for (sp = rules[r].rhs; sp < sp1; sp++) + obstack_printf (oout, " %s", escape (symbols[*sp]->tag)); + + obstack_sgrow (oout, " ."); + + for (/* Nothing */; *sp >= 0; ++sp) + obstack_printf (oout, " %s", escape (symbols[*sp]->tag)); + + /* Experimental feature: display the lookahead tokens. */ + if (report_flag & report_lookahead_tokens + && item_number_is_rule_number (*sp1)) + { + /* Find the reduction we are handling. */ + reductions *reds = s->reductions; + int redno = state_reduction_find (s, &rules[r]); + + /* Print them if there are. */ + if (reds->lookahead_tokens && redno != -1) + { + bitset_iterator biter; + int k; + char const *sep = ""; + obstack_sgrow (oout, " ["); + BITSET_FOR_EACH (biter, reds->lookahead_tokens[redno], k, 0) + { + obstack_sgrow (oout, sep); + obstack_sgrow (oout, escape (symbols[k]->tag)); + sep = ", "; + } + obstack_1grow (oout, ']'); + } + } + obstack_sgrow (oout, "\\l"); } } @@ -85,128 +137,35 @@ print_core (int state, struct obstack *node_obstack) `---------------------------------------------------------------*/ static void -print_actions (int state, const char *node_name) +print_actions (state const *s, FILE *fgraph) { + transitions const *trans = s->transitions; int i; - int k; - int state1; - int symbol; - shifts *shiftp; - errs *errp; - reductions *redp; - int rule; - static char buff[10]; - edge_t edge; - - shiftp = state_table[state].shift_table; - redp = state_table[state].reduction_table; - errp = err_table[state]; - - if (!shiftp && !redp) - { -#if 0 - if (final_state == state) - obstack_sgrow (node_obstack, "$default: accept"); - else - obstack_sgrow (node_obstack, "NO ACTIONS"); -#endif - return; - } - - if (shiftp) - { - k = shiftp->nshifts; - - for (i = 0; i < k; i++) - { - if (!shiftp->shifts[i]) - continue; - state1 = shiftp->shifts[i]; - symbol = state_table[state1].accessing_symbol; - - if (ISVAR (symbol)) - break; - - { - new_edge (&edge); - - if (state > state1) - edge.type = back_edge; - open_edge (&edge, fgraph); - /* The edge source is the current node. */ - edge.sourcename = node_name; - sprintf (buff, "%d", state1); - edge.targetname = buff; - edge.color = (symbol == 0) ? red : blue; - edge.label = tags[symbol]; - output_edge (&edge, fgraph); - close_edge (fgraph); - } - } - } - else - { - i = 0; - k = 0; - } - -#if 0 - if (errp) - { - int j, nerrs; - - nerrs = errp->nerrs; - - for (j = 0; j < nerrs; j++) - { - if (!errp->errs[j]) - continue; - symbol = errp->errs[j]; - /* If something has been added in the NODE_OBSTACK after - the declaration of the label, then we need a `\n'. - if (obstack_object_size (node_obstack) > node_output_size) - obstack_sgrow (node_obstack, "\n"); - */ - obstack_fgrow1 (node_obstack, _("%-4s\terror (nonassociative)"), - tags[symbol]); - } - if (j > 0) - obstack_1grow (node_obstack, '\n'); - } - if (state_table[state].consistent && redp) - { - rule = redp->rules[0]; - symbol = rule_table[rule].lhs; - /* - if (obstack_object_size (node_obstack) > node_output_size) - obstack_sgrow (node_obstack, "\n"); - */ - obstack_fgrow2 (node_obstack, _("$default\treduce using rule %d (%s)"), - rule, tags[symbol]); - } -#endif + if (!trans->num && !s->reductions) + return; - if (i < k) - { - for (; i < k; i++) - { - if (!shiftp->shifts[i]) - continue; - state1 = shiftp->shifts[i]; - symbol = state_table[state1].accessing_symbol; - - new_edge (&edge); - open_edge (&edge, fgraph); - edge.sourcename = node_name; - sprintf (buff, "%d", state1); - edge.targetname = buff; - edge.color = red; - edge.label = tags[symbol]; - output_edge (&edge, fgraph); - close_edge (fgraph); - } - } + for (i = 0; i < trans->num; i++) + if (!TRANSITION_IS_DISABLED (trans, i)) + { + state *s1 = trans->states[i]; + symbol_number sym = s1->accessing_symbol; + + /* Shifts are solid, gotos are dashed, and error is dotted. */ + char const *style = + (TRANSITION_IS_ERROR (trans, i) ? "dotted" + : TRANSITION_IS_SHIFT (trans, i) ? "solid" + : "dashed"); + + if (TRANSITION_IS_ERROR (trans, i) + && strcmp (symbols[sym]->tag, "error") != 0) + abort (); + output_edge (s->number, s1->number, + TRANSITION_IS_ERROR (trans, i) ? NULL : symbols[sym]->tag, + style, fgraph); + } + /* Display reductions. */ + output_red (s, s->reductions, fgraph); } @@ -216,70 +175,35 @@ print_actions (int state, const char *node_name) `-------------------------------------------------------------*/ static void -print_state (int state) +print_state (state *s, FILE *fgraph) { - static char name[10]; struct obstack node_obstack; - node_t node; - /* The labels of the nodes are their the items. */ + /* A node's label contains its items. */ obstack_init (&node_obstack); - new_node (&node); - sprintf (name, "%d", state); - node.title = name; - print_core (state, &node_obstack); + print_core (&node_obstack, s); obstack_1grow (&node_obstack, '\0'); - node.label = obstack_finish (&node_obstack); - - open_node (fgraph); - output_node (&node, fgraph); - close_node (fgraph); + output_node (s->number, obstack_finish (&node_obstack), fgraph); + obstack_free (&node_obstack, 0); /* Output the edges. */ - print_actions (state, name); - - obstack_free (&node_obstack, 0); + print_actions (s, fgraph); } void print_graph (void) { - int i; - - if (!graph_flag) - return; - - /* Output file. */ - fgraph = xfopen (spec_graph_file, "w"); - - new_graph (&graph); - -#if 0 - graph.smanhattan_edges = yes; - graph.manhattan_edges = yes; -#endif - - graph.display_edge_labels = yes; - 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 (fgraph); - output_graph (&graph, fgraph); + state_number i; + FILE *fgraph = xfopen (spec_graph_file, "w"); + start_graph (fgraph); /* Output nodes and edges. */ + new_closure (nritems); for (i = 0; i < nstates; i++) - print_state (i); + print_state (states[i], fgraph); + free_closure (); - /* Close graph. */ - close_graph (&graph, fgraph); + finish_graph (fgraph); xfclose (fgraph); }