X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/4a120d45e6a181ced2f24f2f6d23e2faa9fbd778..bb527fc2715bf579a512b8a4c7787b4f09954bf9:/src/conflicts.c diff --git a/src/conflicts.c b/src/conflicts.c index b2015620..a0c0986d 100644 --- a/src/conflicts.c +++ b/src/conflicts.c @@ -1,192 +1,103 @@ /* Find and resolve or report look-ahead conflicts for bison, - Copyright (C) 1984, 1989, 1992 Free Software Foundation, Inc. + Copyright 1984, 1989, 1992, 2000, 2001 Free Software Foundation, Inc. -This file is part of Bison, the GNU Compiler Compiler. + This file is part of Bison, the GNU Compiler Compiler. -Bison 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. + Bison 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. -Bison 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. + Bison 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. */ + 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. */ -#include #include "system.h" -#include "machine.h" -#include "alloc.h" +#include "complain.h" +#include "getargs.h" #include "files.h" #include "gram.h" #include "state.h" +#include "lalr.h" +#include "conflicts.h" +#include "reader.h" +#include "LR0.h" +errs **err_table = NULL; +/* -1 stands for not specified. */ +int expected_conflicts = -1; +static char *conflicts = NULL; -extern char **tags; -extern int tokensetsize; -extern char *consistent; -extern short *accessing_symbol; -extern shifts **shift_table; -extern unsigned *LA; -extern short *LAruleno; -extern short *lookaheads; -extern int verboseflag; -extern int fixed_outfiles; - -extern void initialize_conflicts PARAMS((void)); -extern void conflict_log PARAMS((void)); -extern void verbose_conflict_log PARAMS((void)); -extern void print_reductions PARAMS((int)); -extern void finalize_conflicts PARAMS((void)); - -static void set_conflicts PARAMS((int)); -static void resolve_sr_conflict PARAMS((int, int)); -static void flush_shift PARAMS((int, int)); -static void log_resolution PARAMS((int, int, int, char *)); -static void total_conflicts PARAMS((void)); -static void count_sr_conflicts PARAMS((int)); -static void count_rr_conflicts PARAMS((int)); - -char any_conflicts; -errs **err_table; -int expected_conflicts; -static char *conflicts; - - -static unsigned *shiftset; -static unsigned *lookaheadset; -static int src_total; -static int rrc_total; -static int src_count; -static int rrc_count; +static unsigned *shiftset = NULL; +static unsigned *lookaheadset = NULL; + - -void -initialize_conflicts (void) +static inline void +log_resolution (int state, int LAno, int token, char *resolution) { - register int i; -/* register errs *sp; JF unused */ - - conflicts = NEW2(nstates, char); - shiftset = NEW2(tokensetsize, unsigned); - lookaheadset = NEW2(tokensetsize, unsigned); - - err_table = NEW2(nstates, errs *); - - any_conflicts = 0; - - for (i = 0; i < nstates; i++) - set_conflicts(i); + obstack_fgrow4 (&output_obstack, + _("\ +Conflict in state %d between rule %d and token %s resolved as %s.\n"), + state, LAruleno[LAno], tags[token], resolution); } +/*------------------------------------------------------------------. +| Turn off the shift recorded for the specified token in the | +| specified state. Used when we resolve a shift-reduce conflict in | +| favor of the reduction. | +`------------------------------------------------------------------*/ + static void -set_conflicts (int state) +flush_shift (int state, int token) { - register int i; - register int k; - register shifts *shiftp; - register unsigned *fp2; - register unsigned *fp3; - register unsigned *fp4; - register unsigned *fp1; - register int symbol; + shifts *shiftp; + int k, i; - if (consistent[state]) return; + shiftp = state_table[state].shift_table; - for (i = 0; i < tokensetsize; i++) - lookaheadset[i] = 0; - - shiftp = shift_table[state]; if (shiftp) { k = shiftp->nshifts; for (i = 0; i < k; i++) { - symbol = accessing_symbol[shiftp->shifts[i]]; - if (ISVAR(symbol)) break; - SETBIT(lookaheadset, symbol); + if (shiftp->shifts[i] + && token == state_table[shiftp->shifts[i]].accessing_symbol) + (shiftp->shifts[i]) = 0; } } - - k = lookaheads[state + 1]; - fp4 = lookaheadset + tokensetsize; - - /* loop over all rules which require lookahead in this state */ - /* first check for shift-reduce conflict, and try to resolve using precedence */ - - for (i = lookaheads[state]; i < k; i++) - if (rprec[LAruleno[i]]) - { - fp1 = LA + i * tokensetsize; - fp2 = fp1; - fp3 = lookaheadset; - - while (fp3 < fp4) - { - if (*fp2++ & *fp3++) - { - resolve_sr_conflict(state, i); - break; - } - } - } - - /* loop over all rules which require lookahead in this state */ - /* Check for conflicts not resolved above. */ - - for (i = lookaheads[state]; i < k; i++) - { - fp1 = LA + i * tokensetsize; - fp2 = fp1; - fp3 = lookaheadset; - - while (fp3 < fp4) - { - if (*fp2++ & *fp3++) - { - conflicts[state] = 1; - any_conflicts = 1; - } - } - - fp2 = fp1; - fp3 = lookaheadset; - - while (fp3 < fp4) - *fp3++ |= *fp2++; - } } - -/* Attempt to resolve shift-reduce conflict for one rule -by means of precedence declarations. -It has already been checked that the rule has a precedence. -A conflict is resolved by modifying the shift or reduce tables -so that there is no longer a conflict. */ +/*------------------------------------------------------------------. +| Attempt to resolve shift-reduce conflict for one rule by means of | +| precedence declarations. It has already been checked that the | +| rule has a precedence. A conflict is resolved by modifying the | +| shift or reduce tables so that there is no longer a conflict. | +`------------------------------------------------------------------*/ static void resolve_sr_conflict (int state, int lookaheadnum) { - register int i; - register int mask; - register unsigned *fp1; - register unsigned *fp2; - register int redprec; - errs *errp = (errs *) xmalloc (sizeof(errs) + ntokens * sizeof(short)); + int i; + int mask; + unsigned *fp1; + unsigned *fp2; + int redprec; + errs *errp = (errs *) xcalloc (sizeof (errs) + ntokens * sizeof (short), 1); short *errtokens = errp->errs; /* find the rule to reduce by to get precedence of reduction */ redprec = rprec[LAruleno[lookaheadnum]]; mask = 1; - fp1 = LA + lookaheadnum * tokensetsize; + fp1 = LA (lookaheadnum); fp2 = lookaheadset; for (i = 0; i < ntokens; i++) { @@ -197,48 +108,47 @@ resolve_sr_conflict (int state, int lookaheadnum) { if (sprec[i] < redprec) { - if (verboseflag) log_resolution(state, lookaheadnum, i, _("reduce")); - *fp2 &= ~mask; /* flush the shift for this token */ - flush_shift(state, i); + log_resolution (state, lookaheadnum, i, _("reduce")); + *fp2 &= ~mask; /* flush the shift for this token */ + flush_shift (state, i); } else if (sprec[i] > redprec) { - if (verboseflag) log_resolution(state, lookaheadnum, i, _("shift")); - *fp1 &= ~mask; /* flush the reduce for this token */ + log_resolution (state, lookaheadnum, i, _("shift")); + *fp1 &= ~mask; /* flush the reduce for this token */ } else { /* Matching precedence levels. - For left association, keep only the reduction. - For right association, keep only the shift. - For nonassociation, keep neither. */ + For left association, keep only the reduction. + For right association, keep only the shift. + For nonassociation, keep neither. */ switch (sassoc[i]) { - - case RIGHT_ASSOC: - if (verboseflag) log_resolution(state, lookaheadnum, i, _("shift")); + case right_assoc: + log_resolution (state, lookaheadnum, i, _("shift")); break; - case LEFT_ASSOC: - if (verboseflag) log_resolution(state, lookaheadnum, i, _("reduce")); + case left_assoc: + log_resolution (state, lookaheadnum, i, _("reduce")); break; - case NON_ASSOC: - if (verboseflag) log_resolution(state, lookaheadnum, i, _("an error")); + case non_assoc: + log_resolution (state, lookaheadnum, i, _("an error")); break; } - if (sassoc[i] != RIGHT_ASSOC) + if (sassoc[i] != right_assoc) { - *fp2 &= ~mask; /* flush the shift for this token */ - flush_shift(state, i); + *fp2 &= ~mask; /* flush the shift for this token */ + flush_shift (state, i); } - if (sassoc[i] != LEFT_ASSOC) - { - *fp1 &= ~mask; /* flush the reduce for this token */ + if (sassoc[i] != left_assoc) + { + *fp1 &= ~mask; /* flush the reduce for this token */ } - if (sassoc[i] == NON_ASSOC) + if (sassoc[i] == non_assoc) { /* Record an explicit error for this token. */ *errtokens++ = i; @@ -250,180 +160,137 @@ resolve_sr_conflict (int state, int lookaheadnum) if (mask == 0) { mask = 1; - fp2++; fp1++; + fp2++; + fp1++; } } errp->nerrs = errtokens - errp->errs; if (errp->nerrs) { /* Some tokens have been explicitly made errors. Allocate - a permanent errs structure for this state, to record them. */ + a permanent errs structure for this state, to record them. */ i = (char *) errtokens - (char *) errp; - err_table[state] = (errs *) xmalloc ((unsigned int)i); + err_table[state] = (errs *) xcalloc ((unsigned int) i, 1); bcopy (errp, err_table[state], i); } else err_table[state] = 0; - free(errp); + free (errp); } - -/* turn off the shift recorded for the specified token in the specified state. -Used when we resolve a shift-reduce conflict in favor of the reduction. */ - static void -flush_shift (int state, int token) +set_conflicts (int state) { - register shifts *shiftp; - register int k, i; -/* register unsigned symbol; JF unused */ + int i; + int k; + shifts *shiftp; + unsigned *fp2; + unsigned *fp3; + unsigned *fp4; + unsigned *fp1; + int symbol; + + if (state_table[state].consistent) + return; - shiftp = shift_table[state]; + for (i = 0; i < tokensetsize; i++) + lookaheadset[i] = 0; + shiftp = state_table[state].shift_table; if (shiftp) { k = shiftp->nshifts; for (i = 0; i < k; i++) { - if (shiftp->shifts[i] && token == accessing_symbol[shiftp->shifts[i]]) - (shiftp->shifts[i]) = 0; + symbol = state_table[shiftp->shifts[i]].accessing_symbol; + if (ISVAR (symbol)) + break; + SETBIT (lookaheadset, symbol); } } -} - - -static void -log_resolution (int state, int LAno, int token, char *resolution) -{ - fprintf(foutput, - _("Conflict in state %d between rule %d and token %s resolved as %s.\n"), - state, LAruleno[LAno], tags[token], resolution); -} - -void -conflict_log (void) -{ - register int i; - - src_total = 0; - rrc_total = 0; - - for (i = 0; i < nstates; i++) - { - if (conflicts[i]) - { - count_sr_conflicts(i); - count_rr_conflicts(i); - src_total += src_count; - rrc_total += rrc_count; - } - } + k = state_table[state + 1].lookaheads; + fp4 = lookaheadset + tokensetsize; - total_conflicts(); -} - + /* Loop over all rules which require lookahead in this state. First + check for shift-reduce conflict, and try to resolve using + precedence */ + for (i = state_table[state].lookaheads; i < k; i++) + if (rprec[LAruleno[i]]) + { + fp1 = LA (i); + fp2 = fp1; + fp3 = lookaheadset; -void -verbose_conflict_log (void) -{ - register int i; + while (fp3 < fp4) + { + if (*fp2++ & *fp3++) + { + resolve_sr_conflict (state, i); + break; + } + } + } - src_total = 0; - rrc_total = 0; - for (i = 0; i < nstates; i++) + /* Loop over all rules which require lookahead in this state. Check + for conflicts not resolved above. */ + for (i = state_table[state].lookaheads; i < k; i++) { - if (conflicts[i]) - { - count_sr_conflicts(i); - count_rr_conflicts(i); - src_total += src_count; - rrc_total += rrc_count; - - fprintf(foutput, _("State %d contains"), i); - - if (src_count == 1) - fprintf(foutput, _(" 1 shift/reduce conflict")); - else if (src_count > 1) - fprintf(foutput, _(" %d shift/reduce conflicts"), src_count); + fp1 = LA (i); + fp2 = fp1; + fp3 = lookaheadset; - if (src_count > 0 && rrc_count > 0) - fprintf(foutput, _(" and")); + while (fp3 < fp4) + if (*fp2++ & *fp3++) + conflicts[state] = 1; - if (rrc_count == 1) - fprintf(foutput, _(" 1 reduce/reduce conflict")); - else if (rrc_count > 1) - fprintf(foutput, _(" %d reduce/reduce conflicts"), rrc_count); + fp2 = fp1; + fp3 = lookaheadset; - putc('.', foutput); - putc('\n', foutput); - } + while (fp3 < fp4) + *fp3++ |= *fp2++; } - - total_conflicts(); } - -static void -total_conflicts (void) +void +solve_conflicts (void) { - if (src_total == expected_conflicts && rrc_total == 0) - return; - - if (fixed_outfiles) - { - /* If invoked under the name `yacc', use the output format - specified by POSIX. */ - fprintf(stderr, _("conflicts: ")); - if (src_total > 0) - fprintf(stderr, _(" %d shift/reduce"), src_total); - if (src_total > 0 && rrc_total > 0) - fprintf(stderr, ","); - if (rrc_total > 0) - fprintf(stderr, _(" %d reduce/reduce"), rrc_total); - putc('\n', stderr); - } - else - { - fprintf(stderr, _("%s contains"), infile); - - if (src_total == 1) - fprintf(stderr, _(" 1 shift/reduce conflict")); - else if (src_total > 1) - fprintf(stderr, _(" %d shift/reduce conflicts"), src_total); + int i; - if (src_total > 0 && rrc_total > 0) - fprintf(stderr, _(" and")); + conflicts = XCALLOC (char, nstates); + shiftset = XCALLOC (unsigned, tokensetsize); + lookaheadset = XCALLOC (unsigned, tokensetsize); - if (rrc_total == 1) - fprintf(stderr, _(" 1 reduce/reduce conflict")); - else if (rrc_total > 1) - fprintf(stderr, _(" %d reduce/reduce conflicts"), rrc_total); + err_table = XCALLOC (errs *, nstates); - putc('.', stderr); - putc('\n', stderr); - } + for (i = 0; i < nstates; i++) + set_conflicts (i); } -static void +/*---------------------------------------------. +| Count the number of shift/reduce conflicts. | +`---------------------------------------------*/ + +static int count_sr_conflicts (int state) { - register int i; - register int k; - register int mask; - register shifts *shiftp; - register unsigned *fp1; - register unsigned *fp2; - register unsigned *fp3; - register int symbol; + int i; + int k; + int mask; + shifts *shiftp; + unsigned *fp1; + unsigned *fp2; + unsigned *fp3; + int symbol; - src_count = 0; + int src_count = 0; - shiftp = shift_table[state]; - if (!shiftp) return; + shiftp = state_table[state].shift_table; + if (!shiftp) + return 0; for (i = 0; i < tokensetsize; i++) { @@ -434,18 +301,20 @@ count_sr_conflicts (int state) k = shiftp->nshifts; for (i = 0; i < k; i++) { - if (! shiftp->shifts[i]) continue; - symbol = accessing_symbol[shiftp->shifts[i]]; - if (ISVAR(symbol)) break; - SETBIT(shiftset, symbol); + if (!shiftp->shifts[i]) + continue; + symbol = state_table[shiftp->shifts[i]].accessing_symbol; + if (ISVAR (symbol)) + break; + SETBIT (shiftset, symbol); } - k = lookaheads[state + 1]; + k = state_table[state + 1].lookaheads; fp3 = lookaheadset + tokensetsize; - for (i = lookaheads[state]; i < k; i++) + for (i = state_table[state].lookaheads; i < k; i++) { - fp1 = LA + i * tokensetsize; + fp1 = LA (i); fp2 = lookaheadset; while (fp2 < fp3) @@ -472,35 +341,38 @@ count_sr_conflicts (int state) fp2++; } } + + return src_count; } -static void +/*----------------------------------------------. +| Count the number of reduce/reduce conflicts. | +`----------------------------------------------*/ + +static int count_rr_conflicts (int state) { - register int i; - register int j; - register int count; - register unsigned mask; - register unsigned *baseword; - register unsigned *wordp; - register int m; - register int n; + int i; + unsigned mask; + unsigned *baseword; - rrc_count = 0; + int rrc_count = 0; - m = lookaheads[state]; - n = lookaheads[state + 1]; + int m = state_table[state].lookaheads; + int n = state_table[state + 1].lookaheads; - if (n - m < 2) return; + if (n - m < 2) + return 0; mask = 1; - baseword = LA + m * tokensetsize; + baseword = LA (m); for (i = 0; i < ntokens; i++) { - wordp = baseword; + unsigned *wordp = baseword; - count = 0; + int count = 0; + int j; for (j = m; j < n; j++) { if (mask & *wordp) @@ -509,7 +381,8 @@ count_rr_conflicts (int state) wordp += tokensetsize; } - if (count >= 2) rrc_count++; + if (count >= 2) + rrc_count++; mask <<= 1; if (mask == 0) @@ -518,48 +391,164 @@ count_rr_conflicts (int state) baseword++; } } + + return rrc_count; } +/*--------------------------------------------------------------. +| Return a human readable string which reports shift/reduce and | +| reduce/reduce conflict numbers (SRC_NUM, RRC_NUM). | +`--------------------------------------------------------------*/ + +static const char * +conflict_report (int src_num, int rrc_num) +{ + static char res[4096]; + char *cp = res; + + if (src_num >= 1) + { + sprintf (cp, ngettext ("%d shift/reduce conflict", + "%d shift/reduce conflicts", src_num), src_num); + cp += strlen (cp); + } + + if (src_num > 0 && rrc_num > 0) + { + sprintf (cp, " %s ", _("and")); + cp += strlen (cp); + } + + if (rrc_num >= 1) + { + sprintf (cp, ngettext ("%d reduce/reduce conflict", + "%d reduce/reduce conflicts", rrc_num), rrc_num); + cp += strlen (cp); + } + + *cp++ = '.'; + *cp++ = '\n'; + *cp++ = '\0'; + + return res; +} + + +/*-----------------------------------------------------------. +| Output the detailed description of states with conflicts. | +`-----------------------------------------------------------*/ void -print_reductions (int state) +conflicts_output (FILE *out) { - register int i; - register int j; - register int k; - register unsigned *fp1; - register unsigned *fp2; - register unsigned *fp3; - register unsigned *fp4; - register int rule; - register int symbol; - register unsigned mask; - register int m; - register int n; - register int default_LA; - register int default_rule = 0; - register int cmax; - register int count; - register shifts *shiftp; - register errs *errp; + int i; + for (i = 0; i < nstates; i++) + if (conflicts[i]) + { + fprintf (out, _("State %d contains "), i); + fputs (conflict_report (count_sr_conflicts (i), + count_rr_conflicts (i)), out); + } +} + + +/*------------------------------------------. +| Reporting the total number of conflicts. | +`------------------------------------------*/ + +void +conflicts_print (void) +{ + int i; + + int src_total = 0; + int rrc_total = 0; + + /* Conflicts by state. */ + for (i = 0; i < nstates; i++) + if (conflicts[i]) + { + src_total += count_sr_conflicts (i); + rrc_total += count_rr_conflicts (i); + } + + /* Report the total number of conflicts on STDERR. */ + if (src_total || rrc_total) + { + if (yacc_flag) + { + /* If invoked with `--yacc', use the output format specified by + POSIX. */ + fprintf (stderr, _("conflicts: ")); + if (src_total > 0) + fprintf (stderr, _(" %d shift/reduce"), src_total); + if (src_total > 0 && rrc_total > 0) + fprintf (stderr, ","); + if (rrc_total > 0) + fprintf (stderr, _(" %d reduce/reduce"), rrc_total); + putc ('\n', stderr); + } + else + { + fprintf (stderr, _("%s contains "), infile); + fputs (conflict_report (src_total, rrc_total), stderr); + } + } + + if (expected_conflicts != -1 + && src_total != expected_conflicts) + { + complain_message_count++; + fprintf (stderr, ngettext ("expected %d shift/reduce conflict", + "expected %d shift/reduce conflicts", + expected_conflicts), + expected_conflicts); + } +} + + +void +print_reductions (FILE *out, int state) +{ + int i; + int j; + int k; + unsigned *fp1; + unsigned *fp2; + unsigned *fp3; + unsigned *fp4; + int rule; + int symbol; + unsigned mask; + int m; + int n; + int default_LA; + int default_rule = 0; + int cmax; + int count; + shifts *shiftp; + errs *errp; int nodefault = 0; for (i = 0; i < tokensetsize; i++) shiftset[i] = 0; - shiftp = shift_table[state]; + shiftp = state_table[state].shift_table; if (shiftp) { k = shiftp->nshifts; for (i = 0; i < k; i++) { - if (! shiftp->shifts[i]) continue; - symbol = accessing_symbol[shiftp->shifts[i]]; - if (ISVAR(symbol)) break; + if (!shiftp->shifts[i]) + continue; + symbol = state_table[shiftp->shifts[i]].accessing_symbol; + if (ISVAR (symbol)) + break; /* if this state has a shift for the error token, don't use a default rule. */ - if (symbol == error_token_number) nodefault = 1; - SETBIT(shiftset, symbol); + if (symbol == error_token_number) + nodefault = 1; + SETBIT (shiftset, symbol); } } @@ -569,20 +558,21 @@ print_reductions (int state) k = errp->nerrs; for (i = 0; i < k; i++) { - if (! errp->errs[i]) continue; + if (!errp->errs[i]) + continue; symbol = errp->errs[i]; - SETBIT(shiftset, symbol); + SETBIT (shiftset, symbol); } } - m = lookaheads[state]; - n = lookaheads[state + 1]; + m = state_table[state].lookaheads; + n = state_table[state + 1].lookaheads; - if (n - m == 1 && ! nodefault) + if (n - m == 1 && !nodefault) { default_rule = LAruleno[m]; - fp1 = LA + m * tokensetsize; + fp1 = LA (m); fp2 = shiftset; fp3 = lookaheadset; fp4 = lookaheadset + tokensetsize; @@ -596,8 +586,8 @@ print_reductions (int state) for (i = 0; i < ntokens; i++) { if (mask & *fp3) - fprintf(foutput, _(" %-4s\t[reduce using rule %d (%s)]\n"), - tags[i], default_rule, tags[rlhs[default_rule]]); + fprintf (out, _(" %-4s\t[reduce using rule %d (%s)]\n"), + tags[i], default_rule, tags[rlhs[default_rule]]); mask <<= 1; if (mask == 0) @@ -607,8 +597,8 @@ print_reductions (int state) } } - fprintf(foutput, _(" $default\treduce using rule %d (%s)\n\n"), - default_rule, tags[rlhs[default_rule]]); + fprintf (out, _(" $default\treduce using rule %d (%s)\n\n"), + default_rule, tags[rlhs[default_rule]]); } else if (n - m >= 1) { @@ -616,16 +606,16 @@ print_reductions (int state) default_LA = -1; fp4 = lookaheadset + tokensetsize; - if (! nodefault) + if (!nodefault) for (i = m; i < n; i++) { - fp1 = LA + i * tokensetsize; + fp1 = LA (i); fp2 = shiftset; fp3 = lookaheadset; - + while (fp3 < fp4) *fp3++ = *fp1++ & (~(*fp2++)); - + count = 0; mask = 1; fp3 = lookaheadset; @@ -633,7 +623,7 @@ print_reductions (int state) { if (mask & *fp3) count++; - + mask <<= 1; if (mask == 0) { @@ -641,38 +631,40 @@ print_reductions (int state) fp3++; } } - + if (count > cmax) { cmax = count; default_LA = i; default_rule = LAruleno[i]; } - + fp2 = shiftset; fp3 = lookaheadset; - + while (fp3 < fp4) *fp2++ |= *fp3++; } for (i = 0; i < tokensetsize; i++) - shiftset[i] = 0; + shiftset[i] = 0; if (shiftp) - { - k = shiftp->nshifts; - for (i = 0; i < k; i++) + { + k = shiftp->nshifts; + for (i = 0; i < k; i++) { - if (! shiftp->shifts[i]) continue; - symbol = accessing_symbol[shiftp->shifts[i]]; - if (ISVAR(symbol)) break; - SETBIT(shiftset, symbol); + if (!shiftp->shifts[i]) + continue; + symbol = state_table[shiftp->shifts[i]].accessing_symbol; + if (ISVAR (symbol)) + break; + SETBIT (shiftset, symbol); } - } + } mask = 1; - fp1 = LA + m * tokensetsize; + fp1 = LA (m); fp2 = shiftset; for (i = 0; i < ntokens; i++) { @@ -693,10 +685,12 @@ print_reductions (int state) if (j != default_LA) { rule = LAruleno[j]; - fprintf(foutput, _(" %-4s\treduce using rule %d (%s)\n"), - tags[i], rule, tags[rlhs[rule]]); + fprintf (out, + _(" %-4s\treduce using rule %d (%s)\n"), + tags[i], rule, tags[rlhs[rule]]); } - else defaulted = 1; + else + defaulted = 1; count++; } @@ -705,13 +699,15 @@ print_reductions (int state) if (defaulted) { rule = LAruleno[default_LA]; - fprintf(foutput, _(" %-4s\treduce using rule %d (%s)\n"), - tags[i], rule, tags[rlhs[rule]]); + fprintf (out, + _(" %-4s\treduce using rule %d (%s)\n"), + tags[i], rule, tags[rlhs[rule]]); defaulted = 0; } rule = LAruleno[j]; - fprintf(foutput, _(" %-4s\t[reduce using rule %d (%s)]\n"), - tags[i], rule, tags[rlhs[rule]]); + fprintf (out, + _(" %-4s\t[reduce using rule %d (%s)]\n"), + tags[i], rule, tags[rlhs[rule]]); } } @@ -723,27 +719,23 @@ print_reductions (int state) { mask = 1; /* We tried incrementing just fp1, and just fp2; both seem wrong. - It seems necessary to increment both in sync. */ + It seems necessary to increment both in sync. */ fp1++; fp2++; } } if (default_LA >= 0) - { - fprintf(foutput, _(" $default\treduce using rule %d (%s)\n"), - default_rule, tags[rlhs[default_rule]]); - } - - putc('\n', foutput); + fprintf (out, _(" $default\treduce using rule %d (%s)\n"), + default_rule, tags[rlhs[default_rule]]); } } void -finalize_conflicts (void) +free_conflicts (void) { - FREE(conflicts); - FREE(shiftset); - FREE(lookaheadset); + XFREE (conflicts); + XFREE (shiftset); + XFREE (lookaheadset); }