X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/ce4d5ce009fe91e1da3740abd9c5941521a1cd07..500bbfcd816776d0ddbf3555fedd41b529c405b3:/src/print_graph.c diff --git a/src/print_graph.c b/src/print_graph.c index 4430f00d..fe0ee76d 100644 --- a/src/print_graph.c +++ b/src/print_graph.c @@ -1,5 +1,5 @@ -/* 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. @@ -19,8 +19,9 @@ 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" @@ -29,214 +30,201 @@ #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); } 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); } -