X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/342b8b6e2156e923797745af2da2596e3086ccd5..9b33de72cd2469bedac2b5f0a48a8782571ea9db:/src/print_graph.c diff --git a/src/print_graph.c b/src/print_graph.c index a00434db..aba69028 100644 --- a/src/print_graph.c +++ b/src/print_graph.c @@ -1,5 +1,7 @@ -/* 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, 2002, 2003, 2004, 2005, 2006 Free Software + Foundation, Inc. This file is part of Bison, the GNU Compiler Compiler. @@ -15,281 +17,170 @@ 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. */ + the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + Boston, MA 02110-1301, USA. */ +#include #include "system.h" -#include "files.h" -#include "gram.h" + +#include + #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 "quotearg.h" +#include "reader.h" +#include "state.h" +#include "symtab.h" -static graph_t graph; -static FILE *fgraph = NULL; -static size_t node_output_size = 0; +/*----------------------------. +| Construct the node labels. | +`----------------------------*/ -/* 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); -} - -/* This part will construct the label of nodes. */ static void -print_core (int state, struct obstack *node_obstack) +print_core (struct obstack *oout, state *s) { - int i; - int k; - int rule; - core *statep; - short *sp; - short *sp1; - - statep = state_table[state]; - k = statep->nitems; + size_t i; + item_number *sitems = s->items; + size_t snritems = s->nitems; - if (k == 0) - return; + /* Output all the items of a state, not only its kernel. */ + if (report_flag & report_itemsets) + { + closure (sitems, snritems); + sitems = itemset; + snritems = nritemset; + } - for (i = 0; i < k; i++) + obstack_fgrow1 (oout, "%d", s->number); + for (i = 0; i < snritems; i++) { - if (i) - obstack_sgrow (node_obstack, "\\n"); + item_number *sp; + item_number *sp1; + rule_number r; - sp1 = sp = ritem + statep->items[i]; + sp1 = sp = ritem + sitems[i]; - while (*sp > 0) + while (*sp >= 0) sp++; - rule = -(*sp); + r = item_number_as_rule_number (*sp); + + obstack_fgrow1 (oout, "\n%s -> ", rules[r].lhs->tag); - obstack_fgrow1 (node_obstack, "%d: ", rule); - obstack_fgrow1 (node_obstack, " %s -> ", quote (tags[rlhs[rule]])); + for (sp = rules[r].rhs; sp < sp1; sp++) + obstack_fgrow1 (oout, "%s ", symbols[*sp]->tag); - 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", symbols[*sp]->tag); - while (*sp > 0) - obstack_fgrow1 (node_obstack, " %s", quote (tags[*sp++])); + /* Experimental feature: display the lookahead tokens. */ + if (report_flag & report_lookahead_tokens) + { + /* 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_fgrow2 (oout, "%s%s", sep, symbols[k]->tag); + sep = ", "; + } + 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 const *s, FILE *fgraph) { 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; - } + transitions const *trans = s->transitions; - if (errp) - { - int j, nerrs; + if (!trans->num && !s->reductions) + return; - nerrs = errp->nerrs; + 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); + } +} - 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"); - } - 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]); - } +/*-------------------------------------------------------------. +| Output in FGRAPH the current node specifications and exiting | +| edges. | +`-------------------------------------------------------------*/ - 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; - edge.color = red; - edge.label = tags[symbol] ? quote (tags[symbol]) : NULL; - output_edge (&edge, fgraph); - close_edge (fgraph); - } - } -} - -/* Output in GRAPH_OBSTACK the current node specifications and edges - which go out from that node. */ static void -print_state (int state) +print_state (state *s, FILE *fgraph) { - static char name[10]; struct obstack node_obstack; - node_t node; + /* A node's label contains its 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. */ - } - - 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); - + print_core (&node_obstack, s); + obstack_1grow (&node_obstack, '\0'); + output_node (s->number, obstack_finish (&node_obstack), fgraph); obstack_free (&node_obstack, 0); + + /* Output the edges. */ + 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++) - /* Output nodes & edges. */ - print_state (i); + print_state (states[i], fgraph); + free_closure (); - /* Close graph. */ - close_graph (&graph, fgraph); + finish_graph (fgraph); xfclose (fgraph); }