X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/640748eecf67130c80b5fd5f5cca19630eddf2b3..2cbd078f5153288a39cbf046231a3870df8170cb:/src/print.c diff --git a/src/print.c b/src/print.c index 1227765b..533e3ca1 100644 --- a/src/print.c +++ b/src/print.c @@ -1,5 +1,6 @@ /* Print information on generated parser, for bison, - Copyright (C) 1984, 1986, 1989, 2000, 2001, 2002 + + Copyright (C) 1984, 1986, 1989, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc. This file is part of Bison, the GNU Compiler Compiler. @@ -16,28 +17,30 @@ 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 "system.h" -#include "quotearg.h" -#include "files.h" -#include "symtab.h" -#include "gram.h" + +#include +#include + #include "LR0.h" -#include "lalr.h" +#include "closure.h" #include "conflicts.h" +#include "files.h" #include "getargs.h" -#include "state.h" -#include "reader.h" +#include "gram.h" +#include "lalr.h" #include "print.h" +#include "reader.h" #include "reduce.h" -#include "closure.h" -#include "bitset.h" +#include "state.h" +#include "symtab.h" -static bitset shiftset; -static bitset lookaheadset; +static bitset shift_set; +static bitset look_ahead_set; #if 0 static void @@ -66,12 +69,12 @@ max_length (size_t *width, const char *str) `--------------------------------*/ static void -print_core (FILE *out, state_t *state) +print_core (FILE *out, state *s) { - int i; - item_number_t *sitems = state->items; - int snritems = state->nitems; - symbol_t *previous_lhs = NULL; + size_t i; + item_number *sitems = s->items; + size_t snritems = s->nitems; + symbol *previous_lhs = NULL; /* Output all the items of a state, not only its kernel. */ if (report_flag & report_itemsets) @@ -88,54 +91,54 @@ print_core (FILE *out, state_t *state) for (i = 0; i < snritems; i++) { - item_number_t *sp; - item_number_t *sp1; - int rule; + item_number *sp; + item_number *sp1; + rule_number r; sp1 = sp = ritem + sitems[i]; while (*sp >= 0) sp++; - rule = item_number_as_rule_number (*sp); + r = item_number_as_rule_number (*sp); - rule_lhs_print (&rules[rule], previous_lhs, out); - previous_lhs = rules[rule].lhs; + rule_lhs_print (&rules[r], previous_lhs, out); + previous_lhs = rules[r].lhs; - for (sp = rules[rule].rhs; sp < sp1; sp++) + for (sp = rules[r].rhs; sp < sp1; sp++) fprintf (out, " %s", symbols[*sp]->tag); fputs (" .", out); for (/* Nothing */; *sp >= 0; ++sp) fprintf (out, " %s", symbols[*sp]->tag); - /* Display the lookaheads? */ - if (report_flag & report_lookaheads) - state_rule_lookaheads_print (state, &rules[rule], out); + /* Display the look-ahead tokens? */ + if (report_flag & report_look_ahead_tokens) + state_rule_look_ahead_tokens_print (s, &rules[r], out); fputc ('\n', out); } } -/*----------------------------------------------------------------. -| Report the shifts iff DISPLAY_SHIFTS_P or the gotos of STATE on | -| OUT. | -`----------------------------------------------------------------*/ +/*------------------------------------------------------------. +| Report the shifts iff DISPLAY_SHIFTS_P or the gotos of S on | +| OUT. | +`------------------------------------------------------------*/ static void -print_transitions (state_t *state, FILE *out, bool display_transitions_p) +print_transitions (state *s, FILE *out, bool display_transitions_p) { - transitions_t *transitions = state->transitions; + transitions *trans = s->transitions; size_t width = 0; int i; - /* Compute the width of the lookaheads column. */ - for (i = 0; i < transitions->num; i++) - if (!TRANSITION_IS_DISABLED (transitions, i) - && TRANSITION_IS_SHIFT (transitions, i) == display_transitions_p) + /* Compute the width of the look-ahead token column. */ + for (i = 0; i < trans->num; i++) + if (!TRANSITION_IS_DISABLED (trans, i) + && TRANSITION_IS_SHIFT (trans, i) == display_transitions_p) { - symbol_t *symbol = symbols[TRANSITION_SYMBOL (transitions, i)]; - max_length (&width, symbol->tag); + symbol *sym = symbols[TRANSITION_SYMBOL (trans, i)]; + max_length (&width, sym->tag); } /* Nothing to report. */ @@ -145,39 +148,39 @@ print_transitions (state_t *state, FILE *out, bool display_transitions_p) fputc ('\n', out); width += 2; - /* Report lookaheads and shifts. */ - for (i = 0; i < transitions->num; i++) - if (!TRANSITION_IS_DISABLED (transitions, i) - && TRANSITION_IS_SHIFT (transitions, i) == display_transitions_p) + /* Report look-ahead tokens and shifts. */ + for (i = 0; i < trans->num; i++) + if (!TRANSITION_IS_DISABLED (trans, i) + && TRANSITION_IS_SHIFT (trans, i) == display_transitions_p) { - symbol_t *symbol = symbols[TRANSITION_SYMBOL (transitions, i)]; - const char *tag = symbol->tag; - state_t *state1 = transitions->states[i]; + symbol *sym = symbols[TRANSITION_SYMBOL (trans, i)]; + const char *tag = sym->tag; + state *s1 = trans->states[i]; int j; fprintf (out, " %s", tag); for (j = width - strlen (tag); j > 0; --j) fputc (' ', out); if (display_transitions_p) - fprintf (out, _("shift, and go to state %d\n"), state1->number); + fprintf (out, _("shift, and go to state %d\n"), s1->number); else - fprintf (out, _("go to state %d\n"), state1->number); + fprintf (out, _("go to state %d\n"), s1->number); } } -/*------------------------------------------------------------. -| Report the explicit errors of STATE raised from %nonassoc. | -`------------------------------------------------------------*/ +/*--------------------------------------------------------. +| Report the explicit errors of S raised from %nonassoc. | +`--------------------------------------------------------*/ static void -print_errs (FILE *out, state_t *state) +print_errs (FILE *out, state *s) { - errs_t *errp = state->errs; + errs *errp = s->errs; size_t width = 0; int i; - /* Compute the width of the lookaheads column. */ + /* Compute the width of the look-ahead token column. */ for (i = 0; i < errp->num; ++i) if (errp->symbols[i]) max_length (&width, errp->symbols[i]->tag); @@ -189,7 +192,7 @@ print_errs (FILE *out, state_t *state) fputc ('\n', out); width += 2; - /* Report lookaheads and errors. */ + /* Report look-ahead tokens and errors. */ for (i = 0; i < errp->num; ++i) if (errp->symbols[i]) { @@ -203,141 +206,144 @@ print_errs (FILE *out, state_t *state) } -/*----------------------------------------------------------. -| Return the default rule of this STATE if it has one, NULL | -| otherwise. | -`----------------------------------------------------------*/ +/*-------------------------------------------------------------. +| Return the default rule of S if it has one, NULL otherwise. | +`-------------------------------------------------------------*/ -static rule_t * -state_default_rule (state_t *state) +static rule * +state_default_rule (state *s) { - reductions_t *redp = state->reductions; - rule_t *default_rule = NULL; + reductions *reds = s->reductions; + rule *default_rule = NULL; int cmax = 0; int i; - /* No need for a lookahead. */ - if (state->consistent) - return redp->rules[0]; + /* No need for a look-ahead. */ + if (s->consistent) + return reds->rules[0]; - /* 1. Each reduction is possibly masked by the lookaheads on which + /* 1. Each reduction is possibly masked by the look-ahead tokens on which we shift (S/R conflicts)... */ - bitset_zero (shiftset); + bitset_zero (shift_set); { - transitions_t *transitions = state->transitions; - FOR_EACH_SHIFT (transitions, i) + transitions *trans = s->transitions; + FOR_EACH_SHIFT (trans, i) { /* If this state has a shift for the error token, don't use a default rule. */ - if (TRANSITION_IS_ERROR (transitions, i)) + if (TRANSITION_IS_ERROR (trans, i)) return NULL; - bitset_set (shiftset, TRANSITION_SYMBOL (transitions, i)); + bitset_set (shift_set, TRANSITION_SYMBOL (trans, i)); } } - /* 2. Each reduction is possibly masked by the lookaheads on which + /* 2. Each reduction is possibly masked by the look-ahead tokens on which we raise an error (due to %nonassoc). */ { - errs_t *errp = state->errs; + errs *errp = s->errs; for (i = 0; i < errp->num; i++) if (errp->symbols[i]) - bitset_set (shiftset, errp->symbols[i]->number); + bitset_set (shift_set, errp->symbols[i]->number); } - for (i = 0; i < state->nlookaheads; ++i) + for (i = 0; i < reds->num; ++i) { int count = 0; - /* How many non-masked lookaheads are there for this reduction? - */ - bitset_andn (lookaheadset, state->lookaheads[i], shiftset); - count = bitset_count (lookaheadset); + /* How many non-masked look-ahead tokens are there for this + reduction? */ + bitset_andn (look_ahead_set, reds->look_ahead_tokens[i], shift_set); + count = bitset_count (look_ahead_set); if (count > cmax) { cmax = count; - default_rule = state->lookaheads_rule[i]; + default_rule = reds->rules[i]; } /* 3. And finally, each reduction is possibly masked by previous reductions (in R/R conflicts, we keep the first reductions). */ - bitset_or (shiftset, shiftset, state->lookaheads[i]); + bitset_or (shift_set, shift_set, reds->look_ahead_tokens[i]); } return default_rule; } -/*--------------------------------------------------------------------. -| Report a reduction of RULE on LOOKAHEADS (which can be `default'). | -| If not ENABLED, the rule is masked by a shift or a reduce (S/R and | -| R/R conflicts). | -`--------------------------------------------------------------------*/ +/*--------------------------------------------------------------------------. +| Report a reduction of RULE on LOOK_AHEAD_TOKEN (which can be `default'). | +| If not ENABLED, the rule is masked by a shift or a reduce (S/R and | +| R/R conflicts). | +`--------------------------------------------------------------------------*/ static void print_reduction (FILE *out, size_t width, - const char *lookahead, - rule_t *rule, bool enabled) + const char *look_ahead_token, + rule *r, bool enabled) { int j; - fprintf (out, " %s", lookahead); - for (j = width - strlen (lookahead); j > 0; --j) + fprintf (out, " %s", look_ahead_token); + for (j = width - strlen (look_ahead_token); j > 0; --j) fputc (' ', out); if (!enabled) fputc ('[', out); - fprintf (out, _("reduce using rule %d (%s)"), - rule->number, rule->lhs->tag); + if (r->number) + fprintf (out, _("reduce using rule %d (%s)"), r->number, r->lhs->tag); + else + fprintf (out, _("accept")); if (!enabled) fputc (']', out); fputc ('\n', out); } -/*----------------------------------------------------. -| Report on OUT the reduction actions of this STATE. | -`----------------------------------------------------*/ +/*-------------------------------------------. +| Report on OUT the reduction actions of S. | +`-------------------------------------------*/ static void -print_reductions (FILE *out, state_t *state) +print_reductions (FILE *out, state *s) { - transitions_t *transitions = state->transitions; - reductions_t *redp = state->reductions; - rule_t *default_rule = NULL; + transitions *trans = s->transitions; + reductions *reds = s->reductions; + rule *default_rule = NULL; size_t width = 0; int i, j; - if (redp->num == 0) + if (reds->num == 0) return; - default_rule = state_default_rule (state); + default_rule = state_default_rule (s); - bitset_zero (shiftset); - FOR_EACH_SHIFT (transitions, i) - bitset_set (shiftset, TRANSITION_SYMBOL (transitions, i)); + bitset_zero (shift_set); + FOR_EACH_SHIFT (trans, i) + bitset_set (shift_set, TRANSITION_SYMBOL (trans, i)); - /* Compute the width of the lookaheads column. */ + /* Compute the width of the look-ahead token column. */ if (default_rule) width = strlen (_("$default")); - for (i = 0; i < ntokens; i++) - { - int count = bitset_test (shiftset, i); - for (j = 0; j < state->nlookaheads; ++j) - if (bitset_test (state->lookaheads[j], i)) - { - if (count == 0) - { - if (state->lookaheads_rule[j] != default_rule) + if (reds->look_ahead_tokens) + for (i = 0; i < ntokens; i++) + { + bool count = bitset_test (shift_set, i); + + for (j = 0; j < reds->num; ++j) + if (bitset_test (reds->look_ahead_tokens[j], i)) + { + if (! count) + { + if (reds->rules[j] != default_rule) + max_length (&width, symbols[i]->tag); + count = true; + } + else + { max_length (&width, symbols[i]->tag); - count++; - } - else - { - max_length (&width, symbols[i]->tag); - } - } - } + } + } + } /* Nothing to report. */ if (!width) @@ -346,90 +352,80 @@ print_reductions (FILE *out, state_t *state) fputc ('\n', out); width += 2; - /* Report lookaheads (or $default) and reductions. */ - for (i = 0; i < ntokens; i++) - { - int defaulted = 0; - int count = bitset_test (shiftset, i); + /* Report look-ahead tokens (or $default) and reductions. */ + if (reds->look_ahead_tokens) + for (i = 0; i < ntokens; i++) + { + bool defaulted = false; + bool count = bitset_test (shift_set, i); - for (j = 0; j < state->nlookaheads; ++j) - if (bitset_test (state->lookaheads[j], i)) - { - if (count == 0) - { - if (state->lookaheads_rule[j] != default_rule) - print_reduction (out, width, - symbols[i]->tag, - state->lookaheads_rule[j], TRUE); - else - defaulted = 1; - count++; - } - else - { - if (defaulted) + for (j = 0; j < reds->num; ++j) + if (bitset_test (reds->look_ahead_tokens[j], i)) + { + if (! count) + { + if (reds->rules[j] != default_rule) + print_reduction (out, width, + symbols[i]->tag, + reds->rules[j], true); + else + defaulted = true; + count = true; + } + else + { + if (defaulted) + print_reduction (out, width, + symbols[i]->tag, + default_rule, true); + defaulted = false; print_reduction (out, width, symbols[i]->tag, - default_rule, TRUE); - defaulted = 0; - print_reduction (out, width, - symbols[i]->tag, - state->lookaheads_rule[j], FALSE); - } - } - } + reds->rules[j], false); + } + } + } if (default_rule) print_reduction (out, width, - _("$default"), default_rule, TRUE); + _("$default"), default_rule, true); } /*--------------------------------------------------------------. | Report on OUT all the actions (shifts, gotos, reductions, and | -| explicit erros from %nonassoc) of STATE. | +| explicit erros from %nonassoc) of S. | `--------------------------------------------------------------*/ static void -print_actions (FILE *out, state_t *state) +print_actions (FILE *out, state *s) { - reductions_t *redp = state->reductions; - transitions_t *transitions = state->transitions; - - if (transitions->num == 0 && redp->num == 0) - { - fputc ('\n', out); - if (state->number == final_state->number) - fprintf (out, _(" $default\taccept\n")); - else - fprintf (out, _(" NO ACTIONS\n")); - return; - } - /* Print shifts. */ - print_transitions (state, out, TRUE); - print_errs (out, state); - print_reductions (out, state); + print_transitions (s, out, true); + print_errs (out, s); + print_reductions (out, s); /* Print gotos. */ - print_transitions (state, out, FALSE); + print_transitions (s, out, false); } -/*--------------------------------------. -| Report all the data on STATE on OUT. | -`--------------------------------------*/ +/*----------------------------------. +| Report all the data on S on OUT. | +`----------------------------------*/ static void -print_state (FILE *out, state_t *state) +print_state (FILE *out, state *s) { fputs ("\n\n", out); - fprintf (out, _("state %d"), state->number); + fprintf (out, _("state %d"), s->number); fputc ('\n', out); - print_core (out, state); - print_actions (out, state); - if ((report_flag & report_solved_conflicts) - && state->solved_conflicts) - fputs (state->solved_conflicts, out); + print_core (out, s); + print_actions (out, s); + if ((report_flag & report_solved_conflicts) && s->solved_conflicts) + { + fputc ('\n', out); + fputs (s->solved_conflicts, out); + } } /*-----------------------------------------. @@ -450,7 +446,7 @@ do { \ static void print_grammar (FILE *out) { - symbol_number_t i; + symbol_number i; char buffer[90]; int column = 0; @@ -462,8 +458,8 @@ print_grammar (FILE *out) if (token_translations[i] != undeftoken->number) { const char *tag = symbols[token_translations[i]]->tag; - rule_number_t r; - item_number_t *rhsp; + rule_number r; + item_number *rhsp; buffer[0] = 0; column = strlen (tag); @@ -488,12 +484,12 @@ print_grammar (FILE *out) for (i = ntokens; i < nsyms; i++) { int left_count = 0, right_count = 0; - rule_number_t r; + rule_number r; const char *tag = symbols[i]->tag; for (r = 0; r < nrules; r++) { - item_number_t *rhsp; + item_number *rhsp; if (rules[r].lhs->number == i) left_count++; for (rhsp = rules[r].rhs; *rhsp >= 0; rhsp++) @@ -531,7 +527,7 @@ print_grammar (FILE *out) sprintf (buffer + strlen (buffer), _(" on right:")); for (r = 0; r < nrules; r++) { - item_number_t *rhsp; + item_number *rhsp; for (rhsp = rules[r].rhs; *rhsp >= 0; rhsp++) if (item_number_as_symbol_number (*rhsp) == i) { @@ -548,13 +544,15 @@ print_grammar (FILE *out) void print_results (void) { - state_number_t i; + state_number i; /* We used to use just .out if SPEC_NAME_PREFIX (-p) was used, but that conflicts with Posix. */ FILE *out = xfopen (spec_verbose_file, "w"); reduce_output (out); + grammar_rules_partial_print (out, + _("Rules never reduced"), rule_never_reduced_p); conflicts_output (out); print_grammar (out); @@ -564,12 +562,12 @@ print_results (void) if (report_flag & report_itemsets) new_closure (nritems); /* Storage for print_reductions. */ - shiftset = bitset_create (ntokens, BITSET_FIXED); - lookaheadset = bitset_create (ntokens, BITSET_FIXED); + shift_set = bitset_create (ntokens, BITSET_FIXED); + look_ahead_set = bitset_create (ntokens, BITSET_FIXED); for (i = 0; i < nstates; i++) print_state (out, states[i]); - bitset_free (shiftset); - bitset_free (lookaheadset); + bitset_free (shift_set); + bitset_free (look_ahead_set); if (report_flag & report_itemsets) free_closure ();