X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/0d8bed5636c07f932fdcb6ef04df749ab1c162d7..a319e6a7a32f824262ae3649ad6b6b31403f7932:/src/output.c?ds=sidebyside diff --git a/src/output.c b/src/output.c index 573eb0ca..f82daee0 100644 --- a/src/output.c +++ b/src/output.c @@ -20,17 +20,15 @@ 02111-1307, USA. */ -/* The parser tables consist of these tables. Marked ones needed only - for the semantic parser. Double marked are output only if switches - are set. +/* The parser tables consist of these tables. YYTRANSLATE = vector mapping yylex's token numbers into bison's token numbers. - ++ YYTNAME = vector of string-names indexed by bison token number. + YYTNAME = vector of string-names indexed by bison token number. - ++ YYTOKNUM = vector of yylex token numbers corresponding to - entries in YYTNAME. + YYTOKNUM = vector of yylex token numbers corresponding to entries + in YYTNAME. YYRLINE = vector of line-numbers of all rules. For yydebug printouts. @@ -44,8 +42,7 @@ YYR2[R] = number of symbols composing right hand side of rule R. - + YYSTOS[S] = the symbol number of the symbol that leads to state - S. + YYSTOS[S] = the symbol number of the symbol that leads to state S. YYDEFACT[S] = default rule to reduce with in state s, when YYTABLE doesn't specify something else to do. Zero means the default is an @@ -79,7 +76,7 @@ in a roundabout way, the bounds of the portion you are trying to examine. - Suppose that the portion of yytable starts at index P and the index + Suppose that the portion of YYTABLE starts at index P and the index to be examined within the portion is I. Then if YYCHECK[P+I] != I, I is outside the bounds of what is actually allocated, and the default (from YYDEFACT or YYDEFGOTO) should be used. Otherwise, @@ -89,866 +86,436 @@ negative short int. Used to flag ?? */ #include "system.h" -#include "bitsetv.h" #include "quotearg.h" #include "error.h" #include "getargs.h" #include "files.h" #include "gram.h" -#include "LR0.h" #include "complain.h" #include "output.h" -#include "lalr.h" #include "reader.h" #include "symtab.h" -#include "conflicts.h" +#include "tables.h" #include "muscle_tab.h" -/* From lib/readpipe.h. */ -FILE *readpipe PARAMS ((const char *, ...)); - /* From src/scan-skel.l. */ -int skel_lex PARAMS ((void)); -extern FILE *skel_in; - -static int nvectors; -static int nentries; -static short **froms = NULL; -static short **tos = NULL; -static short *tally = NULL; -static short *width = NULL; -static short *actrow = NULL; -static short *state_count = NULL; -static short *order = NULL; -static short *base = NULL; -static short *pos = NULL; -static short *table = NULL; -static short *check = NULL; -static int lowzero; -static int high; - -struct obstack muscle_obstack; -static struct obstack format_obstack; +void m4_invoke PARAMS ((const char *definitions)); -int error_verbose = 0; -/* Returns the number of lines of S. */ -size_t -get_lines_number (const char *s) -{ - size_t lines = 0; +static struct obstack format_obstack; - size_t i; - for (i = 0; s[i]; ++i) - if (s[i] == '\n') - ++lines; +int error_verbose = 0; - return lines; -} -/* FIXME. */ +/*-------------------------------------------------------------------. +| Create a function NAME which associates to the muscle NAME the | +| result of formatting the FIRST and then TABLE_DATA[BEGIN..END[ (of | +| TYPE), and to the muscle NAME_max, the max value of the | +| TABLE_DATA. | +`-------------------------------------------------------------------*/ -static inline void -output_table_data (struct obstack *oout, - short *table_data, - short first, - int begin, - int end) -{ - int i; - int j = 1; - obstack_fgrow1 (oout, "%6d", first); - for (i = begin; i < end; ++i) - { - obstack_1grow (oout, ','); - if (j >= 10) - { - obstack_sgrow (oout, "\n "); - j = 1; - } - else - ++j; - obstack_fgrow1 (oout, "%6d", table_data[i]); - } - obstack_1grow (oout, 0); +#define GENERATE_MUSCLE_INSERT_TABLE(Name, Type) \ + \ +static void \ +Name (const char *name, \ + Type *table_data, \ + Type first, \ + int begin, \ + int end) \ +{ \ + Type min = first; \ + Type max = first; \ + int i; \ + int j = 1; \ + \ + obstack_fgrow1 (&format_obstack, "%6d", first); \ + for (i = begin; i < end; ++i) \ + { \ + obstack_1grow (&format_obstack, ','); \ + if (j >= 10) \ + { \ + obstack_sgrow (&format_obstack, "\n "); \ + j = 1; \ + } \ + else \ + ++j; \ + obstack_fgrow1 (&format_obstack, "%6d", table_data[i]); \ + if (table_data[i] < min) \ + min = table_data[i]; \ + if (max < table_data[i]) \ + max = table_data[i]; \ + } \ + obstack_1grow (&format_obstack, 0); \ + muscle_insert (name, obstack_finish (&format_obstack)); \ + \ + /* Build `NAME_min' and `NAME_max' in the obstack. */ \ + obstack_fgrow1 (&format_obstack, "%s_min", name); \ + obstack_1grow (&format_obstack, 0); \ + MUSCLE_INSERT_LONG_INT (obstack_finish (&format_obstack), \ + (long int) min); \ + obstack_fgrow1 (&format_obstack, "%s_max", name); \ + obstack_1grow (&format_obstack, 0); \ + MUSCLE_INSERT_LONG_INT (obstack_finish (&format_obstack), \ + (long int) max); \ } +GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_unsigned_int_table, unsigned int) +GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_int_table, int) +GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_short_table, short) +GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_base_table, base_t) +GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_rule_number_table, rule_number_t) +GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_symbol_number_table, symbol_number_t) +GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_item_number_table, item_number_t) +GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_state_number_table, state_number_t) -static void -output_token_translations (void) -{ - output_table_data (&format_obstack, token_translations, - 0, 1, max_user_token_number + 1); - muscle_insert ("translate", obstack_finish (&format_obstack)); - XFREE (token_translations); -} +/*-----------------------------------------------------------------. +| Prepare the muscles related to the tokens: translate, tname, and | +| toknum. | +`-----------------------------------------------------------------*/ static void -output_gram (void) +prepare_tokens (void) { - { - int i; - short *values = XCALLOC (short, nrules + 1); - for (i = 0; i < nrules + 1; ++i) - values[i] = rules[i].rhs; - output_table_data (&format_obstack, values, - 0, 1, nrules + 1); - XFREE (values); - } - - muscle_insert ("prhs", obstack_finish (&format_obstack)); + muscle_insert_symbol_number_table ("translate", + token_translations, + token_translations[0], + 1, max_user_token_number + 1); { - short *yyrhs; int i; + int j = 0; + for (i = 0; i < nsyms; i++) + { + /* Be sure not to use twice the same QUOTEARG slot: + SYMBOL_TAG_GET uses slot 0. */ + const char *cp = + quotearg_n_style (1, c_quoting_style, + symbols[i]->tag); + /* Width of the next token, including the two quotes, the coma + and the space. */ + int strsize = strlen (cp) + 2; + + if (j + strsize > 75) + { + obstack_sgrow (&format_obstack, "\n "); + j = 2; + } + + obstack_sgrow (&format_obstack, cp); + obstack_sgrow (&format_obstack, ", "); + j += strsize; + } + /* Add a NULL entry to list of tokens (well, 0, as NULL might not be + defined). */ + obstack_sgrow (&format_obstack, "0"); - yyrhs = XMALLOC (short, nritems); - - for (i = 1; i < nritems; ++i) - yyrhs[i] = ritem[i] >= 0 ? ritem[i] : -1; - - output_table_data (&format_obstack, yyrhs, - ritem[0], 1, nritems); - muscle_insert ("rhs", obstack_finish (&format_obstack)); - - XFREE (yyrhs); - } - -#if 0 - if (!semantic_parser) - obstack_sgrow (&table_obstack, "\n#endif\n"); -#endif -} - - -static void -output_stos (void) -{ - size_t i; - short *values = (short *) alloca (sizeof (short) * nstates); - for (i = 0; i < nstates; ++i) - values[i] = states[i]->accessing_symbol; - output_table_data (&format_obstack, values, - 0, 1, nstates); - muscle_insert ("stos", obstack_finish (&format_obstack)); -} - - -static void -output_rule_data (void) -{ - int i; - int j; - short *short_tab = NULL; - - { - short *values = XCALLOC (short, nrules + 1); - for (i = 0; i < nrules + 1; ++i) - values[i] = rules[i].line; - output_table_data (&format_obstack, values, - 0, 1, nrules + 1); - muscle_insert ("rline", obstack_finish (&format_obstack)); - XFREE (values); + /* Finish table and store. */ + obstack_1grow (&format_obstack, 0); + muscle_insert ("tname", obstack_finish (&format_obstack)); } - - j = 0; - for (i = 0; i < nsyms; i++) - { - /* Be sure not to use twice the same quotearg slot. */ - const char *cp = - quotearg_n_style (1, c_quoting_style, - quotearg_style (escape_quoting_style, symbols[i]->tag)); - /* Width of the next token, including the two quotes, the coma - and the space. */ - int strsize = strlen (cp) + 2; - - if (j + strsize > 75) - { - obstack_sgrow (&format_obstack, "\n "); - j = 2; - } - - obstack_sgrow (&format_obstack, cp); - obstack_sgrow (&format_obstack, ", "); - j += strsize; - } - /* Add a NULL entry to list of tokens (well, 0, as NULL might not be - defined). */ - obstack_sgrow (&format_obstack, "0"); - - /* Finish table and store. */ - obstack_1grow (&format_obstack, 0); - muscle_insert ("tname", obstack_finish (&format_obstack)); - /* Output YYTOKNUM. */ { - short *values = XCALLOC (short, ntokens + 1); - for (i = 0; i < ntokens + 1; ++i) + int i; + int *values = XCALLOC (int, ntokens); + for (i = 0; i < ntokens; ++i) values[i] = symbols[i]->user_token_number; - output_table_data (&format_obstack, values, - 0, 1, ntokens + 1); - muscle_insert ("toknum", obstack_finish (&format_obstack)); - XFREE (values); - } - - - /* Output YYR1. */ - { - short *values = XCALLOC (short, nrules + 1); - for (i = 0; i < nrules + 1; ++i) - values[i] = rules[i].lhs; - output_table_data (&format_obstack, values, - 0, 1, nrules + 1); - muscle_insert ("r1", obstack_finish (&format_obstack)); - XFREE (values); + muscle_insert_int_table ("toknum", values, + values[0], 1, ntokens); + free (values); } - - /* Output YYR2. */ - short_tab = XMALLOC (short, nrules + 1); - for (i = 1; i < nrules; i++) - short_tab[i] = rules[i + 1].rhs - rules[i].rhs - 1; - short_tab[nrules] = nritems - rules[nrules].rhs - 1; - output_table_data (&format_obstack, short_tab, - 0, 1, nrules + 1); - muscle_insert ("r2", obstack_finish (&format_obstack)); - XFREE (short_tab); } -/*------------------------------------------------------------------. -| Decide what to do for each type of token if seen as the lookahead | -| token in specified state. The value returned is used as the | -| default action (yydefact) for the state. In addition, actrow is | -| filled with what to do for each kind of token, index by symbol | -| number, with zero meaning do the default action. The value | -| MINSHORT, a very negative number, means this situation is an | -| error. The parser recognizes this value specially. | -| | -| This is where conflicts are resolved. The loop over lookahead | -| rules considered lower-numbered rules last, and the last rule | -| considered that likes a token gets to handle it. | -`------------------------------------------------------------------*/ - -static int -action_row (state_t *state) -{ - int i; - int default_rule = 0; - reductions *redp = state->reductions; - shifts *shiftp = state->shifts; - errs *errp = state->errs; - /* set nonzero to inhibit having any default reduction */ - int nodefault = 0; - - for (i = 0; i < ntokens; i++) - actrow[i] = 0; - if (redp->nreds >= 1) - { - int j; - /* loop over all the rules available here which require - lookahead */ - for (i = state->nlookaheads - 1; i >= 0; --i) - /* and find each token which the rule finds acceptable - to come next */ - for (j = 0; j < ntokens; j++) - /* and record this rule as the rule to use if that - token follows. */ - if (bitset_test (LA[state->lookaheadsp + i], j)) - actrow[j] = -LAruleno[state->lookaheadsp + i]; - } - - /* Now see which tokens are allowed for shifts in this state. For - them, record the shift as the thing to do. So shift is preferred - to reduce. */ - for (i = 0; i < shiftp->nshifts; i++) - { - int symbol; - int shift_state = shiftp->shifts[i]; - if (!shift_state) - continue; +/*-------------------------------------------------------------. +| Prepare the muscles related to the rules: rhs, prhs, r1, r2, | +| rline, dprec, merger | +`-------------------------------------------------------------*/ - symbol = states[shift_state]->accessing_symbol; - - if (ISVAR (symbol)) - break; - - actrow[symbol] = shift_state; - - /* Do not use any default reduction if there is a shift for - error */ - if (symbol == error_token_number) - nodefault = 1; - } - - /* See which tokens are an explicit error in this state (due to - %nonassoc). For them, record MINSHORT as the action. */ - for (i = 0; i < errp->nerrs; i++) - { - int symbol = errp->errs[i]; - actrow[symbol] = MINSHORT; - } - - /* Now find the most common reduction and make it the default action - for this state. */ - - if (redp->nreds >= 1 && !nodefault) +static void +prepare_rules (void) +{ + rule_number_t r; + unsigned int i = 0; + item_number_t *rhs = XMALLOC (item_number_t, nritems); + unsigned int *prhs = XMALLOC (unsigned int, nrules); + unsigned int *rline = XMALLOC (unsigned int, nrules); + symbol_number_t *r1 = XMALLOC (symbol_number_t, nrules); + unsigned int *r2 = XMALLOC (unsigned int, nrules); + short *dprec = XMALLOC (short, nrules); + short *merger = XMALLOC (short, nrules); + + for (r = 0; r < nrules; ++r) { - if (state->consistent) - default_rule = redp->rules[0]; - else - { - int max = 0; - for (i = 0; i < state->nlookaheads; i++) - { - int count = 0; - int rule = -LAruleno[state->lookaheadsp + i]; - int j; - - for (j = 0; j < ntokens; j++) - if (actrow[j] == rule) - count++; - - if (count > max) - { - max = count; - default_rule = rule; - } - } - - /* actions which match the default are replaced with zero, - which means "use the default" */ - - if (max > 0) - { - int j; - for (j = 0; j < ntokens; j++) - if (actrow[j] == default_rule) - actrow[j] = 0; - - default_rule = -default_rule; - } - } + item_number_t *rhsp = NULL; + /* Index of rule R in RHS. */ + prhs[r] = i; + /* RHS of the rule R. */ + for (rhsp = rules[r].rhs; *rhsp >= 0; ++rhsp) + rhs[i++] = *rhsp; + /* LHS of the rule R. */ + r1[r] = rules[r].lhs->number; + /* Length of rule R's RHS. */ + r2[r] = i - prhs[r]; + /* Separator in RHS. */ + rhs[i++] = -1; + /* Line where rule was defined. */ + rline[r] = rules[r].location.first_line; + /* Dynamic precedence (GLR) */ + dprec[r] = rules[r].dprec; + /* Merger-function index (GLR) */ + merger[r] = rules[r].merger; } - - /* If have no default rule, the default is an error. - So replace any action which says "error" with "use default". */ - - if (default_rule == 0) - for (i = 0; i < ntokens; i++) - if (actrow[i] == MINSHORT) - actrow[i] = 0; - - return default_rule; + assert (i == nritems); + + muscle_insert_item_number_table ("rhs", rhs, ritem[0], 1, nritems); + muscle_insert_unsigned_int_table ("prhs", prhs, 0, 0, nrules); + muscle_insert_unsigned_int_table ("rline", rline, 0, 0, nrules); + muscle_insert_symbol_number_table ("r1", r1, 0, 0, nrules); + muscle_insert_unsigned_int_table ("r2", r2, 0, 0, nrules); + muscle_insert_short_table ("dprec", dprec, 0, 0, nrules); + muscle_insert_short_table ("merger", merger, 0, 0, nrules); + + free (rhs); + free (prhs); + free (rline); + free (r1); + free (r2); + free (dprec); + free (merger); } +/*--------------------------------------------. +| Prepare the muscles related to the states. | +`--------------------------------------------*/ static void -save_row (int state) +prepare_states (void) { - int i; - int count; - short *sp; - short *sp1; - short *sp2; - - count = 0; - for (i = 0; i < ntokens; i++) - if (actrow[i] != 0) - count++; - - if (count == 0) - return; - - froms[state] = sp1 = sp = XCALLOC (short, count); - tos[state] = sp2 = XCALLOC (short, count); - - for (i = 0; i < ntokens; i++) - if (actrow[i] != 0) - { - *sp1++ = i; - *sp2++ = actrow[i]; - } - - tally[state] = count; - width[state] = sp1[-1] - sp[0] + 1; + state_number_t i; + symbol_number_t *values = + (symbol_number_t *) alloca (sizeof (symbol_number_t) * nstates); + for (i = 0; i < nstates; ++i) + values[i] = states[i]->accessing_symbol; + muscle_insert_symbol_number_table ("stos", values, + 0, 1, nstates); } -/*------------------------------------------------------------------. -| Figure out the actions for the specified state, indexed by | -| lookahead token type. | -| | -| The YYDEFACT table is output now. The detailed info is saved for | -| putting into YYTABLE later. | -`------------------------------------------------------------------*/ + +/*----------------------------------. +| Output the user actions to OOUT. | +`----------------------------------*/ static void -token_actions (void) +user_actions_output (FILE *out) { - size_t i; - short *yydefact = XCALLOC (short, nstates); - - actrow = XCALLOC (short, ntokens); - for (i = 0; i < nstates; ++i) - { - yydefact[i] = action_row (states[i]); - save_row (i); - } - - output_table_data (&format_obstack, yydefact, - yydefact[0], 1, nstates); - muscle_insert ("defact", obstack_finish (&format_obstack)); + rule_number_t r; - XFREE (actrow); - XFREE (yydefact); -} - - -/*-----------------------------. -| Output the actions to OOUT. | -`-----------------------------*/ - -void -actions_output (FILE *out) -{ - int rule; - for (rule = 1; rule < nrules + 1; ++rule) - if (rules[rule].action) + fputs ("m4_define([b4_actions], \n[[", out); + for (r = 0; r < nrules; ++r) + if (rules[r].action) { - fprintf (out, " case %d:\n", rule); + fprintf (out, " case %d:\n", r + 1); if (!no_lines_flag) fprintf (out, muscle_find ("linef"), - rules[rule].action_line, + rules[r].action_location.first_line, quotearg_style (c_quoting_style, muscle_find ("filename"))); - /* As a Bison extension, add the ending semicolon. Since some - Yacc don't do that, help people using bison as a Yacc - finding their missing semicolons. */ - fprintf (out, "{ %s%s }\n break;\n\n", - rules[rule].action, - yacc_flag ? ";" : ""); + fprintf (out, " %s\n break;\n\n", + rules[r].action); } + fputs ("]])\n\n", out); } +/*--------------------------------------. +| Output the merge functions to OUT. | +`--------------------------------------*/ -/*----------------------------. -| Output the guards to OOUT. | -`----------------------------*/ - -void -guards_output (FILE *out) +static void +merger_output (FILE *out) { - int rule; - for (rule = 1; rule < nrules + 1; ++rule) - if (rules[rule].guard) - { - fprintf (out, " case %d:\n", rule); + int n; + merger_list* p; - if (!no_lines_flag) - fprintf (out, muscle_find ("linef"), - rules[rule].guard_line, - quotearg_style (c_quoting_style, - muscle_find ("filename"))); - fprintf (out, "{ %s; }\n break;\n\n", - rules[rule].guard); - } + fputs ("m4_define([b4_mergers], \n[[", out); + for (n = 1, p = merge_functions; p != NULL; n += 1, p = p->next) + { + if (p->type[0] == '\0') + fprintf (out, " case %d: yyval = %s (*yy0, *yy1); break;\n", + n, p->name); + else + fprintf (out, " case %d: yyval.%s = %s (*yy0, *yy1); break;\n", + n, p->type, p->name); + } + fputs ("]])\n\n", out); } - /*---------------------------------------. | Output the tokens definition to OOUT. | `---------------------------------------*/ -void +static void token_definitions_output (FILE *out) { int i; int first = 1; + + fputs ("m4_define([b4_tokens], \n[", out); for (i = 0; i < ntokens; ++i) { - bucket *symbol = symbols[i]; + symbol_t *symbol = symbols[i]; int number = symbol->user_token_number; - if (number == SALIAS) - continue; + /* At this stage, if there are literal aliases, they are part of + SYMBOLS, so we should not find symbols which are the aliases + here. */ + assert (number != USER_NUMBER_ALIAS); + /* Skip error token. */ - if (symbol->value == error_token_number) + if (symbol == errtoken) + continue; + + /* If this string has an alias, then it is necessarily the alias + which is to be output. */ + if (symbol->alias) + symbol = symbol->alias; + + /* Don't output literal chars or strings (when defined only as a + string). Note that must be done after the alias resolution: + think about `%token 'f' "f"'. */ + if (symbol->tag[0] == '\'' || symbol->tag[0] == '\"') continue; - if (symbol->tag[0] == '\'') - continue; /* skip literal character */ - if (symbol->tag[0] == '\"') - { - /* use literal string only if given a symbol with an alias */ - if (symbol->alias) - symbol = symbol->alias; - else - continue; - } /* Don't #define nonliteral tokens whose names contain periods or '$' (as does the default value of the EOF token). */ if (strchr (symbol->tag, '.') || strchr (symbol->tag, '$')) continue; - fprintf (out, "%s [[[%s]], [%d]]", + fprintf (out, "%s[[[%s]], [%d]]", first ? "" : ",\n", symbol->tag, number); - if (semantic_parser) - /* FIXME: This is probably wrong, and should be just as - above. --akim. */ - fprintf (out, "# define T%s\t%d\n", symbol->tag, symbol->value); + first = 0; } + fputs ("])\n\n", out); } +/*----------------------------------------. +| Output the symbol destructors to OOUT. | +`----------------------------------------*/ + static void -save_column (int symbol, int default_state) +symbol_destructors_output (FILE *out) { int i; - short *sp; - short *sp1; - short *sp2; - int count; - int symno = symbol - ntokens + nstates; - - short begin = goto_map[symbol]; - short end = goto_map[symbol + 1]; - - count = 0; - for (i = begin; i < end; i++) - if (to_state[i] != default_state) - count++; - - if (count == 0) - return; - - froms[symno] = sp1 = sp = XCALLOC (short, count); - tos[symno] = sp2 = XCALLOC (short, count); - - for (i = begin; i < end; i++) - if (to_state[i] != default_state) - { - *sp1++ = from_state[i]; - *sp2++ = to_state[i]; - } - - tally[symno] = count; - width[symno] = sp1[-1] - sp[0] + 1; -} - -static int -default_goto (int symbol) -{ - size_t i; - size_t m = goto_map[symbol]; - size_t n = goto_map[symbol + 1]; - int default_state = -1; - int max = 0; - - if (m == n) - return -1; - - for (i = 0; i < nstates; i++) - state_count[i] = 0; - - for (i = m; i < n; i++) - state_count[to_state[i]]++; + int first = 1; - for (i = 0; i < nstates; i++) - if (state_count[i] > max) + fputs ("m4_define([b4_symbol_destructors], \n[", out); + for (i = 0; i < nsyms; ++i) + if (symbols[i]->destructor) { - max = state_count[i]; - default_state = i; + symbol_t *symbol = symbols[i]; + + /* Filename, lineno, + Symbol-name, Symbol-number, + destructor, typename. */ + fprintf (out, "%s[[[%s]], [[%d]], [[%s]], [[%d]], [[%s]], [[%s]]]", + first ? "" : ",\n", + infile, symbol->destructor_location.first_line, + symbol->tag, + symbol->number, + symbol->destructor, + symbol->type_name); + + first = 0; } - - return default_state; -} - - -/*-------------------------------------------------------------------. -| Figure out what to do after reducing with each rule, depending on | -| the saved state from before the beginning of parsing the data that | -| matched this rule. | -| | -| The YYDEFGOTO table is output now. The detailed info is saved for | -| putting into YYTABLE later. | -`-------------------------------------------------------------------*/ - -static void -goto_actions (void) -{ - int i; - short *yydefgoto = XMALLOC (short, nsyms - ntokens); - - state_count = XCALLOC (short, nstates); - for (i = ntokens; i < nsyms; ++i) - { - int default_state = default_goto (i); - save_column (i, default_state); - yydefgoto[i - ntokens] = default_state; - } - - output_table_data (&format_obstack, yydefgoto, - yydefgoto[0], 1, nsyms - ntokens); - muscle_insert ("defgoto", obstack_finish (&format_obstack)); - - XFREE (state_count); - XFREE (yydefgoto); + fputs ("])\n\n", out); } -/* The next few functions decide how to pack the actions and gotos - information into yytable. */ +/*-------------------------------------. +| Output the symbol printers to OOUT. | +`-------------------------------------*/ static void -sort_actions (void) +symbol_printers_output (FILE *out) { int i; + int first = 1; - order = XCALLOC (short, nvectors); - nentries = 0; - - for (i = 0; i < nvectors; i++) - if (tally[i] > 0) + fputs ("m4_define([b4_symbol_printers], \n[", out); + for (i = 0; i < nsyms; ++i) + if (symbols[i]->destructor) { - int k; - int t = tally[i]; - int w = width[i]; - int j = nentries - 1; - - while (j >= 0 && (width[order[j]] < w)) - j--; - - while (j >= 0 && (width[order[j]] == w) && (tally[order[j]] < t)) - j--; - - for (k = nentries - 1; k > j; k--) - order[k + 1] = order[k]; - - order[j + 1] = i; - nentries++; + symbol_t *symbol = symbols[i]; + + /* Filename, lineno, + Symbol-name, Symbol-number, + destructor, typename. */ + fprintf (out, "%s[[[%s]], [[%d]], [[%s]], [[%d]], [[%s]], [[%s]]]", + first ? "" : ",\n", + infile, symbol->printer_location.first_line, + symbol->tag, + symbol->number, + symbol->printer, + symbol->type_name); + + first = 0; } -} - - -static int -matching_state (int vector) -{ - int i = order[vector]; - int t; - int w; - int prev; - - if (i >= (int) nstates) - return -1; - - t = tally[i]; - w = width[i]; - - for (prev = vector - 1; prev >= 0; prev--) - { - int j = order[prev]; - int k; - int match = 1; - - if (width[j] != w || tally[j] != t) - return -1; - - for (k = 0; match && k < t; k++) - if (tos[j][k] != tos[i][k] || froms[j][k] != froms[i][k]) - match = 0; - - if (match) - return j; - } - - return -1; -} - - -static int -pack_vector (int vector) -{ - int i = order[vector]; - int j; - int t = tally[i]; - int loc = 0; - short *from = froms[i]; - short *to = tos[i]; - - assert (t); - - for (j = lowzero - from[0]; j < MAXTABLE; j++) - { - int k; - int ok = 1; - - for (k = 0; ok && k < t; k++) - { - loc = j + from[k]; - if (loc > MAXTABLE) - fatal (_("maximum table size (%d) exceeded"), MAXTABLE); - - if (table[loc] != 0) - ok = 0; - } - - for (k = 0; ok && k < vector; k++) - if (pos[k] == j) - ok = 0; - - if (ok) - { - for (k = 0; k < t; k++) - { - loc = j + from[k]; - table[loc] = to[k]; - check[loc] = from[k]; - } - - while (table[lowzero] != 0) - lowzero++; - - if (loc > high) - high = loc; - - return j; - } - } -#define pack_vector_succeeded 0 - assert (pack_vector_succeeded); - return 0; -} - - -static void -pack_table (void) -{ - int i; - int place; - int state; - - base = XCALLOC (short, nvectors); - pos = XCALLOC (short, nentries); - table = XCALLOC (short, MAXTABLE); - check = XCALLOC (short, MAXTABLE); - - lowzero = 0; - high = 0; - - for (i = 0; i < nvectors; i++) - base[i] = MINSHORT; - - for (i = 0; i < MAXTABLE; i++) - check[i] = -1; - - for (i = 0; i < nentries; i++) - { - state = matching_state (i); - - if (state < 0) - place = pack_vector (i); - else - place = base[state]; - - pos[i] = place; - base[order[i]] = place; - } - - for (i = 0; i < nvectors; i++) - { - XFREE (froms[i]); - XFREE (tos[i]); - } - - XFREE (froms); - XFREE (tos); - XFREE (pos); -} - -/* the following functions output yytable, yycheck - and the vectors whose elements index the portion starts */ - -static void -output_base (void) -{ - /* Output pact. */ - output_table_data (&format_obstack, base, - base[0], 1, nstates); - muscle_insert ("pact", obstack_finish (&format_obstack)); - - /* Output pgoto. */ - output_table_data (&format_obstack, base, - base[nstates], nstates + 1, nvectors); - muscle_insert ("pgoto", obstack_finish (&format_obstack)); - - XFREE (base); -} - - -static void -output_table (void) -{ - output_table_data (&format_obstack, table, - table[0], 1, high + 1); - muscle_insert ("table", obstack_finish (&format_obstack)); - XFREE (table); + fputs ("])\n\n", out); } static void -output_check (void) +prepare_actions (void) { - output_table_data (&format_obstack, check, - check[0], 1, high + 1); - muscle_insert ("check", obstack_finish (&format_obstack)); - XFREE (check); -} - -/* compute and output yydefact, yydefgoto, yypact, yypgoto, yytable - and yycheck. */ + /* Figure out the actions for the specified state, indexed by + lookahead token type. */ -static void -output_actions (void) -{ - size_t i; - nvectors = nstates + nvars; + muscle_insert_rule_number_table ("defact", yydefact, + yydefact[0], 1, nstates); - froms = XCALLOC (short *, nvectors); - tos = XCALLOC (short *, nvectors); - tally = XCALLOC (short, nvectors); - width = XCALLOC (short, nvectors); + /* Figure out what to do after reducing with each rule, depending on + the saved state from before the beginning of parsing the data + that matched this rule. */ + muscle_insert_state_number_table ("defgoto", yydefgoto, + yydefgoto[0], 1, nsyms - ntokens); - token_actions (); - bitsetv_free (LA); - XFREE (LAruleno); - goto_actions (); - XFREE (goto_map + ntokens); - XFREE (from_state); - XFREE (to_state); + /* Output PACT. */ + muscle_insert_base_table ("pact", base, + base[0], 1, nstates); + MUSCLE_INSERT_INT ("pact_ninf", base_ninf); - sort_actions (); - pack_table (); + /* Output PGOTO. */ + muscle_insert_base_table ("pgoto", base, + base[nstates], nstates + 1, nvectors); - output_base (); - output_table (); + muscle_insert_base_table ("table", table, + table[0], 1, high + 1); + MUSCLE_INSERT_INT ("table_ninf", table_ninf); - output_check (); + muscle_insert_base_table ("check", check, + check[0], 1, high + 1); - for (i = 0; i < nstates; ++i) + if (glr_parser) { - free (states[i]->shifts); - XFREE (states[i]->reductions); - free (states[i]->errs); - free (states[i]); + /* GLR parsing slightly modifies yytable and yycheck + (and thus yypact) so that in states with unresolved conflicts, + the default reduction is not used in the conflicted entries, so + that there is a place to put a conflict pointer. This means that + yyconflp and yyconfl are nonsense for a non-GLR parser, so we + avoid accidents by not writing them out in that case. */ + muscle_insert_unsigned_int_table ("conflict_list_heads", conflict_table, + conflict_table[0], 1, high+1); + muscle_insert_unsigned_int_table ("conflicting_rules", conflict_list, + conflict_list[0], 1, conflict_list_cnt); } - XFREE (states); } @@ -982,17 +549,11 @@ output_skeleton (void) fputs ("m4_changecom()\n", out); fputs ("m4_init()\n", out); - fputs ("m4_define([b4_actions], \n[[", out); - actions_output (out); - fputs ("]])\n\n", out); - - fputs ("m4_define([b4_guards], \n[[", out); - guards_output (out); - fputs ("]])\n\n", out); - - fputs ("m4_define([b4_tokens], \n[", out); + user_actions_output (out); + merger_output (out); token_definitions_output (out); - fputs ("])\n\n", out); + symbol_destructors_output (out); + symbol_printers_output (out); muscles_m4_output (out); @@ -1000,73 +561,62 @@ output_skeleton (void) fputs ("m4_divert_push(0)dnl\n", out); xfclose (out); - /* Invoke m4 on the definition of the muscles, and the skeleton. */ - { - const char *bison_pkgdatadir = getenv ("BISON_PKGDATADIR"); - const char *m4 = getenv ("M4"); - if (!m4) - m4 = M4; - if (!bison_pkgdatadir) - bison_pkgdatadir = PKGDATADIR; - if (trace_flag) - fprintf (stderr, - "running: %s -I %s m4sugar/m4sugar.m4 %s %s\n", - m4, bison_pkgdatadir, tempfile, skeleton); - skel_in = readpipe (m4, - "-I", bison_pkgdatadir, - "m4sugar/m4sugar.m4", - tempfile, - skeleton, - NULL); - if (!skel_in) - error (EXIT_FAILURE, errno, "cannot run m4"); - skel_lex (); - - /* If `debugging', keep this file alive. */ - if (!trace_flag) - unlink (tempfile); - } + timevar_push (TV_M4); + m4_invoke (tempfile); + timevar_pop (TV_M4); + + /* If `debugging', keep this file alive. */ + if (!(trace_flag & trace_tools)) + unlink (tempfile); + + free (tempfile); } static void prepare (void) { - MUSCLE_INSERT_INT ("last", high); - MUSCLE_INSERT_INT ("flag", MINSHORT); + /* Flags. */ + MUSCLE_INSERT_INT ("locations_flag", locations_flag); + MUSCLE_INSERT_INT ("defines_flag", defines_flag); + MUSCLE_INSERT_INT ("error_verbose", error_verbose); MUSCLE_INSERT_INT ("pure", pure_parser); - MUSCLE_INSERT_INT ("nsym", nsyms); MUSCLE_INSERT_INT ("debug", debug_flag); - MUSCLE_INSERT_INT ("final", final_state); - MUSCLE_INSERT_INT ("maxtok", max_user_token_number); - MUSCLE_INSERT_INT ("error_verbose", error_verbose); - MUSCLE_INSERT_STRING ("prefix", spec_name_prefix ? spec_name_prefix : "yy"); /* FIXME: This is wrong: the muscles should decide whether they hold a copy or not, but the situation is too obscure currently. */ + MUSCLE_INSERT_STRING ("prefix", spec_name_prefix ? spec_name_prefix : "yy"); MUSCLE_INSERT_STRING ("output_infix", output_infix ? output_infix : ""); MUSCLE_INSERT_STRING ("output_prefix", short_base_name); MUSCLE_INSERT_STRING ("output_parser_name", parser_file_name); MUSCLE_INSERT_STRING ("output_header_name", spec_defines_file); - MUSCLE_INSERT_INT ("nnts", nvars); - MUSCLE_INSERT_INT ("nrules", nrules); - MUSCLE_INSERT_INT ("nstates", nstates); - MUSCLE_INSERT_INT ("ntokens", ntokens); + /* Symbols. */ + MUSCLE_INSERT_INT ("tokens_number", ntokens); + MUSCLE_INSERT_INT ("nterms_number", nvars); + MUSCLE_INSERT_INT ("undef_token_number", undeftoken->number); + MUSCLE_INSERT_INT ("user_token_number_max", max_user_token_number); - MUSCLE_INSERT_INT ("locations_flag", locations_flag); - MUSCLE_INSERT_INT ("defines_flag", defines_flag); + /* Rules. */ + MUSCLE_INSERT_INT ("rules_number", nrules); - /* Copy definitions in directive. */ - obstack_1grow (&attrs_obstack, 0); - muscle_insert ("prologue", obstack_finish (&attrs_obstack)); + /* States. */ + MUSCLE_INSERT_INT ("last", high); + MUSCLE_INSERT_INT ("final_state_number", final_state->number); + MUSCLE_INSERT_INT ("states_number", nstates); + + /* User Code. */ + obstack_1grow (&pre_prologue_obstack, 0); + obstack_1grow (&post_prologue_obstack, 0); + muscle_insert ("pre_prologue", obstack_finish (&pre_prologue_obstack)); + muscle_insert ("post_prologue", obstack_finish (&post_prologue_obstack)); /* Find the right skeleton file. */ if (!skeleton) { - if (semantic_parser) - skeleton = "bison.hairy"; + if (glr_parser) + skeleton = "glr.c"; else - skeleton = "bison.simple"; + skeleton = "yacc.c"; } /* Parse the skeleton file and output the needed parsers. */ @@ -1083,21 +633,17 @@ output (void) { obstack_init (&format_obstack); - output_token_translations (); - output_gram (); - - if (semantic_parser) - output_stos (); - output_rule_data (); - output_actions (); + prepare_tokens (); + prepare_rules (); + prepare_states (); + prepare_actions (); prepare (); /* Process the selected skeleton file. */ output_skeleton (); - obstack_free (&muscle_obstack, NULL); obstack_free (&format_obstack, NULL); - obstack_free (&action_obstack, NULL); - obstack_free (&attrs_obstack, NULL); + obstack_free (&pre_prologue_obstack, NULL); + obstack_free (&post_prologue_obstack, NULL); }