X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/914feea9d07b0a53ee958e8df755addb97196913..e91ff6ce3d2653b41265591dafd4bdb32ae114c2:/src/output.c diff --git a/src/output.c b/src/output.c index c2720d96..f8cb5350 100644 --- a/src/output.c +++ b/src/output.c @@ -122,6 +122,11 @@ static short *state_count = NULL; static short *order = NULL; static short *base = NULL; static short *pos = NULL; + +/* TABLE_SIZE is the allocated size of both TABLE and CHECK. + We start with the original hard-coded value: SHRT_MAX + (yes, not USHRT_MAX). */ +static size_t table_size = SHRT_MAX; static short *table = NULL; static short *check = NULL; static int lowzero; @@ -132,199 +137,226 @@ static struct obstack format_obstack; int error_verbose = 0; -/* Returns the number of lines of S. */ -size_t -get_lines_number (const char *s) -{ - size_t lines = 0; - size_t i; - for (i = 0; s[i]; ++i) - if (s[i] == '\n') - ++lines; +/*----------------------------------------------------------------. +| If TABLE (and CHECK) appear to be small to be addressed at | +| DESIRED, grow them. Note that TABLE[DESIRED] is to be used, so | +| the desired size is at least DESIRED + 1. | +`----------------------------------------------------------------*/ - return lines; -} +static void +table_grow (size_t desired) +{ + size_t old_size = table_size; + while (table_size <= desired) + table_size *= 2; -/* FIXME. */ + if (trace_flag) + fprintf (stderr, "growing table and check from: %d to %d\n", + old_size, table_size); -static inline void -output_table_data (struct obstack *oout, - short *table_data, - short first, - int begin, - int end) -{ - int i; - int j = 1; + table = XREALLOC (table, short, table_size); + check = XREALLOC (check, short, table_size); - obstack_fgrow1 (oout, "%6d", first); - for (i = begin; i < end; ++i) + for (/* Nothing. */; old_size < table_size; ++old_size) { - obstack_1grow (oout, ','); - if (j >= 10) - { - obstack_sgrow (oout, "\n "); - j = 1; - } - else - ++j; - obstack_fgrow1 (oout, "%6d", table_data[i]); + table[old_size] = 0; + check[old_size] = -1; } - obstack_1grow (oout, 0); } -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); +/*------------------------------------------------------------------. +| Create a function NAME which Format the FIRST and then | +| TABLE_DATA[BEGIN..END[ (of TYPE) into OOUT, and return the number | +| of bits needed for its longuest value. | +`------------------------------------------------------------------*/ + + +#define GENERATE_OUTPUT_TABLE(Name, Type) \ + \ +static inline long int \ +Name (struct obstack *oout, \ + Type *table_data, \ + Type first, \ + int begin, \ + int end) \ +{ \ + long int max = first; \ + 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]); \ + if (table_data[i] > max) \ + max = table_data[i]; \ + } \ + obstack_1grow (oout, 0); \ + \ + return max; \ } +GENERATE_OUTPUT_TABLE(output_int_table, int) +GENERATE_OUTPUT_TABLE(output_short_table, short) +GENERATE_OUTPUT_TABLE(output_token_number_table, token_number_t) +GENERATE_OUTPUT_TABLE(output_item_number_table, item_number_t) + + +/*-----------------------------------------------------------------. +| Prepare the muscles related to the tokens: translate, tname, and | +| toknum. | +`-----------------------------------------------------------------*/ static void -output_gram (void) +prepare_tokens (void) { + long int max = output_token_number_table (&format_obstack, + token_translations, + 0, 1, max_user_token_number + 1); + muscle_insert ("translate", obstack_finish (&format_obstack)); + MUSCLE_INSERT_LONG_INT ("token_number_max", max); + XFREE (token_translations); + { 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); - } + int 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"); - muscle_insert ("prhs", obstack_finish (&format_obstack)); + /* Finish table and store. */ + obstack_1grow (&format_obstack, 0); + muscle_insert ("tname", obstack_finish (&format_obstack)); + } + /* Output YYTOKNUM. */ { - short *yyrhs; int i; - - 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); + short *values = XCALLOC (short, ntokens + 1); + for (i = 0; i < ntokens + 1; ++i) + values[i] = symbols[i]->user_token_number; + output_short_table (&format_obstack, values, + 0, 1, ntokens + 1); + muscle_insert ("toknum", obstack_finish (&format_obstack)); + free (values); } - -#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)); -} - +/*-------------------------------------------------------------. +| Prepare the muscles related to the rules: rhs, prhs, r1, r2, | +| rline. | +`-------------------------------------------------------------*/ static void -output_rule_data (void) +prepare_rules (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); - } - - - j = 0; - for (i = 0; i < nsyms; i++) + long int max; + item_number_t *rhsp; + int r; + int i = 0; + item_number_t *rhs = XMALLOC (item_number_t, nritems); + short *prhs = XMALLOC (short, nrules + 1); + token_number_t *r1 = XMALLOC (token_number_t, nrules + 1); + short *r2 = XMALLOC (short, nrules + 1); + short *rline = XMALLOC (short, nrules + 1); + + for (r = 1; r < nrules + 1; ++r) { - /* 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; + /* 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].line; } - /* Add a NULL entry to list of tokens (well, 0, as NULL might not be - defined). */ - obstack_sgrow (&format_obstack, "0"); + assert (i == nritems); - /* Finish table and store. */ - obstack_1grow (&format_obstack, 0); - muscle_insert ("tname", obstack_finish (&format_obstack)); + max = output_int_table (&format_obstack, rhs, ritem[0], 1, nritems); + muscle_insert ("rhs", obstack_finish (&format_obstack)); + MUSCLE_INSERT_LONG_INT ("rhs_number_max", max); - /* Output YYTOKNUM. */ - { - short *values = XCALLOC (short, ntokens + 1); - for (i = 0; i < ntokens + 1; ++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_short_table (&format_obstack, prhs, 0, 1, nrules + 1); + muscle_insert ("prhs", obstack_finish (&format_obstack)); + output_short_table (&format_obstack, rline, 0, 1, nrules + 1); + muscle_insert ("rline", obstack_finish (&format_obstack)); - /* 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); - } + output_token_number_table (&format_obstack, r1, 0, 1, nrules + 1); + muscle_insert ("r1", obstack_finish (&format_obstack)); - /* 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); + output_short_table (&format_obstack, r2, 0, 1, nrules + 1); muscle_insert ("r2", obstack_finish (&format_obstack)); - XFREE (short_tab); + + free (rhs); + free (prhs); + free (r2); +} + +/*--------------------------------------------. +| Prepare the muscles related to the states. | +`--------------------------------------------*/ + +static void +prepare_states (void) +{ + size_t i; + token_number_t *values = + (token_number_t *) alloca (sizeof (token_number_t) * nstates); + for (i = 0; i < nstates; ++i) + values[i] = states[i]->accessing_symbol; + output_token_number_table (&format_obstack, values, + 0, 1, nstates); + muscle_insert ("stos", obstack_finish (&format_obstack)); } + /*------------------------------------------------------------------. | 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 | +| SHRT_MIN, 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 | @@ -358,7 +390,7 @@ action_row (state_t *state) /* 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]; + actrow[j] = -LArule[state->lookaheadsp + i]->number; } /* Now see which tokens are allowed for shifts in this state. For @@ -366,7 +398,7 @@ action_row (state_t *state) to reduce. */ for (i = 0; i < shiftp->nshifts; i++) { - int symbol; + token_number_t symbol; int shift_state = shiftp->shifts[i]; if (!shift_state) continue; @@ -380,16 +412,16 @@ action_row (state_t *state) /* Do not use any default reduction if there is a shift for error */ - if (symbol == error_token_number) + if (symbol == errtoken->number) nodefault = 1; } /* See which tokens are an explicit error in this state (due to - %nonassoc). For them, record MINSHORT as the action. */ + %nonassoc). For them, record SHRT_MIN as the action. */ for (i = 0; i < errp->nerrs; i++) { int symbol = errp->errs[i]; - actrow[symbol] = MINSHORT; + actrow[symbol] = SHRT_MIN; } /* Now find the most common reduction and make it the default action @@ -405,7 +437,7 @@ action_row (state_t *state) for (i = 0; i < state->nlookaheads; i++) { int count = 0; - int rule = -LAruleno[state->lookaheadsp + i]; + int rule = -LArule[state->lookaheadsp + i]->number; int j; for (j = 0; j < ntokens; j++) @@ -439,7 +471,7 @@ action_row (state_t *state) if (default_rule == 0) for (i = 0; i < ntokens; i++) - if (actrow[i] == MINSHORT) + if (actrow[i] == SHRT_MIN) actrow[i] = 0; return default_rule; @@ -499,7 +531,7 @@ token_actions (void) save_row (i); } - output_table_data (&format_obstack, yydefact, + output_short_table (&format_obstack, yydefact, yydefact[0], 1, nstates); muscle_insert ("defact", obstack_finish (&format_obstack)); @@ -568,15 +600,16 @@ void token_definitions_output (FILE *out) { int i; + int first = 1; 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; /* Skip error token. */ - if (symbol->value == error_token_number) + if (symbol == errtoken) continue; if (symbol->tag[0] == '\'') continue; /* skip literal character */ @@ -594,12 +627,13 @@ token_definitions_output (FILE *out) if (strchr (symbol->tag, '.') || strchr (symbol->tag, '$')) continue; - fprintf (out, "# define %s\t%d\n", - symbol->tag, number); + 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); + fprintf (out, "# define T%s\t%d\n", symbol->tag, symbol->number); + first = 0; } } @@ -691,7 +725,7 @@ goto_actions (void) yydefgoto[i - ntokens] = default_state; } - output_table_data (&format_obstack, yydefgoto, + output_short_table (&format_obstack, yydefgoto, yydefgoto[0], 1, nsyms - ntokens); muscle_insert ("defgoto", obstack_finish (&format_obstack)); @@ -781,7 +815,7 @@ pack_vector (int vector) assert (t); - for (j = lowzero - from[0]; j < MAXTABLE; j++) + for (j = lowzero - from[0]; j < (int) table_size; j++) { int k; int ok = 1; @@ -789,8 +823,8 @@ pack_vector (int vector) for (k = 0; ok && k < t; k++) { loc = j + from[k]; - if (loc > MAXTABLE) - fatal (_("maximum table size (%d) exceeded"), MAXTABLE); + if (loc > (int) table_size) + table_grow (loc); if (table[loc] != 0) ok = 0; @@ -833,16 +867,16 @@ pack_table (void) base = XCALLOC (short, nvectors); pos = XCALLOC (short, nentries); - table = XCALLOC (short, MAXTABLE); - check = XCALLOC (short, MAXTABLE); + table = XCALLOC (short, table_size); + check = XCALLOC (short, table_size); lowzero = 0; high = 0; for (i = 0; i < nvectors; i++) - base[i] = MINSHORT; + base[i] = SHRT_MIN; - for (i = 0; i < MAXTABLE; i++) + for (i = 0; i < (int) table_size; i++) check[i] = -1; for (i = 0; i < nentries; i++) @@ -876,12 +910,12 @@ static void output_base (void) { /* Output pact. */ - output_table_data (&format_obstack, base, + output_short_table (&format_obstack, base, base[0], 1, nstates); muscle_insert ("pact", obstack_finish (&format_obstack)); /* Output pgoto. */ - output_table_data (&format_obstack, base, + output_short_table (&format_obstack, base, base[nstates], nstates + 1, nvectors); muscle_insert ("pgoto", obstack_finish (&format_obstack)); @@ -892,7 +926,7 @@ output_base (void) static void output_table (void) { - output_table_data (&format_obstack, table, + output_short_table (&format_obstack, table, table[0], 1, high + 1); muscle_insert ("table", obstack_finish (&format_obstack)); XFREE (table); @@ -902,14 +936,16 @@ output_table (void) static void output_check (void) { - output_table_data (&format_obstack, check, + output_short_table (&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. */ +/*-----------------------------------------------------------------. +| Compute and output yydefact, yydefgoto, yypact, yypgoto, yytable | +| and yycheck. | +`-----------------------------------------------------------------*/ static void output_actions (void) @@ -924,7 +960,7 @@ output_actions (void) token_actions (); bitsetv_free (LA); - XFREE (LAruleno); + free (LArule); goto_actions (); XFREE (goto_map + ntokens); @@ -958,10 +994,9 @@ static void output_skeleton (void) { /* Store the definition of all the muscles. */ - char *tempdir = getenv ("TMPDIR"); + const char *tempdir = getenv ("TMPDIR"); char *tempfile = NULL; FILE *out = NULL; - ssize_t bytes_read; int fd; if (tempdir == NULL) @@ -989,9 +1024,9 @@ output_skeleton (void) guards_output (out); fputs ("]])\n\n", out); - fputs ("m4_define([b4_tokendef], \n[[", out); + fputs ("m4_define([b4_tokens], \n[", out); token_definitions_output (out); - fputs ("]])\n\n", out); + fputs ("])\n\n", out); muscles_m4_output (out); @@ -1031,12 +1066,13 @@ static void prepare (void) { MUSCLE_INSERT_INT ("last", high); - MUSCLE_INSERT_INT ("flag", MINSHORT); + MUSCLE_INSERT_INT ("flag", SHRT_MIN); 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 ("undef_token_number", undeftoken->number); + MUSCLE_INSERT_INT ("user_token_number_max", max_user_token_number); MUSCLE_INSERT_INT ("error_verbose", error_verbose); MUSCLE_INSERT_STRING ("prefix", spec_name_prefix ? spec_name_prefix : "yy"); @@ -1082,12 +1118,9 @@ output (void) { obstack_init (&format_obstack); - output_token_translations (); - output_gram (); - - if (semantic_parser) - output_stos (); - output_rule_data (); + prepare_tokens (); + prepare_rules (); + prepare_states (); output_actions (); prepare ();