X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/300f275f23b65c09f69a437c635c48ddd126f21a..e91ff6ce3d2653b41265591dafd4bdb32ae114c2:/src/output.c?ds=sidebyside diff --git a/src/output.c b/src/output.c index 43172154..f8cb5350 100644 --- a/src/output.c +++ b/src/output.c @@ -1,5 +1,6 @@ /* Output the generated parsing program for bison, - Copyright 1984, 1986, 1989, 1992, 2000, 2001 Free Software Foundation, Inc. + Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002 + Free Software Foundation, Inc. This file is part of Bison, the GNU Compiler Compiler. @@ -19,80 +20,78 @@ 02111-1307, USA. */ -/* The parser tables consist of these tables. - Starred ones needed only for the semantic parser. - Double starred are output only if switches are set. +/* The parser tables consist of these tables. Marked ones needed only + for the semantic parser. Double marked are output only if switches + are set. - yytranslate = vector mapping yylex's token numbers into bison's token - numbers. + 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. + YYRLINE = vector of line-numbers of all rules. For yydebug + printouts. - yyrhs = vector of items of all rules. - This is exactly what ritems contains. For yydebug and for semantic - parser. + YYRHS = vector of items of all rules. This is exactly what RITEMS + contains. For yydebug and for semantic parser. - yyprhs[r] = index in yyrhs of first item for rule r. + YYPRHS[R] = index in YYRHS of first item for rule R. - yyr1[r] = symbol number of symbol that rule r derives. + YYR1[R] = symbol number of symbol that rule R derives. - yyr2[r] = number of symbols composing right hand side of rule r. + 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 error. + 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 + error. - yydefgoto[i] = default state to go to after a reduction of a rule that - generates variable ntokens + i, except when yytable - specifies something else to do. + YYDEFGOTO[I] = default state to go to after a reduction of a rule + that generates variable NTOKENS + I, except when YYTABLE specifies + something else to do. - yypact[s] = index in yytable of the portion describing state s. - The lookahead token's type is used to index that portion - to find out what to do. + YYPACT[S] = index in YYTABLE of the portion describing state S. + The lookahead token's type is used to index that portion to find + out what to do. - If the value in yytable is positive, - we shift the token and go to that state. + If the value in YYTABLE is positive, we shift the token and go to + that state. If the value is negative, it is minus a rule number to reduce by. - If the value is zero, the default action from yydefact[s] is used. + If the value is zero, the default action from YYDEFACT[S] is used. - yypgoto[i] = the index in yytable of the portion describing - what to do after reducing a rule that derives variable i + ntokens. - This portion is indexed by the parser state number, s, - as of before the text for this nonterminal was read. - The value from yytable is the state to go to if - the corresponding value in yycheck is s. + YYPGOTO[I] = the index in YYTABLE of the portion describing what to + do after reducing a rule that derives variable I + NTOKENS. This + portion is indexed by the parser state number, S, as of before the + text for this nonterminal was read. The value from YYTABLE is the + state to go to if the corresponding value in YYCHECK is S. - yytable = a vector filled with portions for different uses, - found via yypact and yypgoto. + YYTABLE = a vector filled with portions for different uses, found + via YYPACT and YYPGOTO. - yycheck = a vector indexed in parallel with yytable. - It indicates, in a roundabout way, the bounds of the - portion you are trying to examine. + YYCHECK = a vector indexed in parallel with YYTABLE. It indicates, + 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 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, yytable[p+i] should be used. + 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, + YYTABLE[P+I] should be used. - YYFINAL = the state number of the termination state. - YYFLAG = most negative short int. Used to flag ?? - YYNTBASE = ntokens. -*/ + YYFINAL = the state number of the termination state. YYFLAG = most + negative short int. Used to flag ?? */ #include "system.h" -#include "obstack.h" +#include "bitsetv.h" #include "quotearg.h" +#include "error.h" #include "getargs.h" #include "files.h" #include "gram.h" @@ -101,10 +100,16 @@ #include "output.h" #include "lalr.h" #include "reader.h" +#include "symtab.h" #include "conflicts.h" #include "muscle_tab.h" -extern void berror PARAMS((const char *)); +/* 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; @@ -117,213 +122,241 @@ 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; static int high; struct obstack muscle_obstack; -struct obstack output_obstack; +static struct obstack format_obstack; + +int error_verbose = 0; + -/* FIXME. */ +/*----------------------------------------------------------------. +| 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. | +`----------------------------------------------------------------*/ -static inline void -output_table_data (struct obstack *oout, - short *table_data, - short first, - short begin, - short end) +static void +table_grow (size_t desired) { - int i; - int j = 1; + size_t old_size = table_size; + + while (table_size <= desired) + table_size *= 2; - obstack_fgrow1 (oout, "%6d", first); - for (i = begin; i < end; ++i) + if (trace_flag) + fprintf (stderr, "growing table and check from: %d to %d\n", + old_size, table_size); + + table = XREALLOC (table, short, table_size); + check = XREALLOC (check, short, table_size); + + 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 (&output_obstack, token_translations, - 0, 1, max_user_token_number + 1); - muscle_insert ("translate", obstack_finish (&output_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] = rule_table[i].rhs; - output_table_data (&output_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 (&output_obstack)); + /* Finish table and store. */ + obstack_1grow (&format_obstack, 0); + muscle_insert ("tname", obstack_finish (&format_obstack)); + } + /* Output YYTOKNUM. */ { - size_t yyrhs_size = 1; - short *yyrhs, *sp; int i; - - for (sp = ritem + 1; *sp; sp++) - ++yyrhs_size; - yyrhs = XMALLOC (short, yyrhs_size); - - for (sp = ritem + 1, i = 1; *sp; ++sp, ++i) - yyrhs[i] = *sp > 0 ? *sp : 0; - - output_table_data (&output_obstack, yyrhs, - ritem[0], 1, yyrhs_size); - muscle_insert ("rhs", obstack_finish (&output_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 && !no_parser_flag) - obstack_sgrow (&table_obstack, "\n#endif\n"); -#endif } -static void -output_stos (void) -{ - int i; - short *values = (short *) alloca (sizeof (short) * nstates); - for (i = 0; i < nstates; ++i) - values[i] = state_table[i].accessing_symbol; - output_table_data (&output_obstack, values, - 0, 1, nstates); - muscle_insert ("stos", obstack_finish (&output_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] = rule_table[i].line; - output_table_data (&output_obstack, values, - 0, 1, nrules + 1); - muscle_insert ("rline", obstack_finish (&output_obstack)); - XFREE (values); - } + 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) + { + /* 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; + } + assert (i == nritems); + 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); - j = 0; - for (i = 0; i < nsyms; i++) - /* this used to be i<=nsyms, but that output a final "" symbol - almost by accident */ - { - /* Width of the next token, including the two quotes, the coma - and the space. */ - int strsize = 4; - char *p; - - for (p = tags[i]; p && *p; p++) - if (*p == '"' || *p == '\\' || *p == '\n' || *p == '\t' - || *p == '\b') - strsize += 2; - else if (*p < 040 || *p >= 0177) - strsize += 4; - else - strsize++; - - if (j + strsize > 75) - { - obstack_sgrow (&output_obstack, "\n "); - j = 2; - } + output_short_table (&format_obstack, prhs, 0, 1, nrules + 1); + muscle_insert ("prhs", obstack_finish (&format_obstack)); - obstack_1grow (&output_obstack, '\"'); - for (p = tags[i]; p && *p; p++) - { - if (*p == '"' || *p == '\\') - obstack_fgrow1 (&output_obstack, "\\%c", *p); - else if (*p == '\n') - obstack_sgrow (&output_obstack, "\\n"); - else if (*p == '\t') - obstack_sgrow (&output_obstack, "\\t"); - else if (*p == '\b') - obstack_sgrow (&output_obstack, "\\b"); - else if (*p < 040 || *p >= 0177) - obstack_fgrow1 (&output_obstack, "\\%03o", *p); - else - obstack_1grow (&output_obstack, *p); - } + output_short_table (&format_obstack, rline, 0, 1, nrules + 1); + muscle_insert ("rline", obstack_finish (&format_obstack)); - obstack_sgrow (&output_obstack, "\", "); - j += strsize; - } - /* add a NULL entry to list of tokens */ - obstack_sgrow (&output_obstack, "NULL"); + output_token_number_table (&format_obstack, r1, 0, 1, nrules + 1); + muscle_insert ("r1", obstack_finish (&format_obstack)); - /* Finish table and store. */ - obstack_1grow (&output_obstack, 0); - muscle_insert ("tname", obstack_finish (&output_obstack)); + output_short_table (&format_obstack, r2, 0, 1, nrules + 1); + muscle_insert ("r2", obstack_finish (&format_obstack)); - /* Output YYTOKNUM. */ - output_table_data (&output_obstack, user_toknums, - 0, 1, ntokens + 1); - muscle_insert ("toknum", obstack_finish (&output_obstack)); + free (rhs); + free (prhs); + free (r2); +} - /* Output YYR1. */ - { - short *values = XCALLOC (short, nrules + 1); - for (i = 0; i < nrules + 1; ++i) - values[i] = rule_table[i].lhs; - output_table_data (&output_obstack, values, - 0, 1, nrules + 1); - muscle_insert ("r1", obstack_finish (&output_obstack)); - XFREE (values); - } +/*--------------------------------------------. +| Prepare the muscles related to the states. | +`--------------------------------------------*/ - /* Output YYR2. */ - short_tab = XMALLOC (short, nrules + 1); - for (i = 1; i < nrules; i++) - short_tab[i] = rule_table[i + 1].rhs - rule_table[i].rhs - 1; - short_tab[nrules] = nitems - rule_table[nrules].rhs - 1; - output_table_data (&output_obstack, short_tab, - 0, 1, nrules + 1); - muscle_insert ("r2", obstack_finish (&output_obstack)); - XFREE (short_tab); - - XFREE (rule_table + 1); +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 | @@ -332,137 +365,84 @@ output_rule_data (void) `------------------------------------------------------------------*/ static int -action_row (int state) +action_row (state_t *state) { int i; - int j; - int k; - int m = 0; - int n = 0; - int count; - int default_rule; - int nreds; - int max; - int rule; - int shift_state; - int symbol; - unsigned mask; - unsigned *wordp; - reductions *redp; - shifts *shiftp; - errs *errp; - int nodefault = 0; /* set nonzero to inhibit having any default reduction */ + 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; - default_rule = 0; - nreds = 0; - redp = state_table[state].reduction_table; - - if (redp) + if (redp->nreds >= 1) { - nreds = redp->nreds; - - if (nreds >= 1) - { - /* loop over all the rules available here which require - lookahead */ - m = state_table[state].lookaheads; - n = state_table[state + 1].lookaheads; - - for (i = n - 1; i >= m; i--) - { - rule = -LAruleno[i]; - wordp = LA (i); - mask = 1; - - /* 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 (mask & *wordp) - actrow[j] = rule; - - mask <<= 1; - if (mask == 0) - { - mask = 1; - wordp++; - } - } - } - } + 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] = -LArule[state->lookaheadsp + i]->number; } - shiftp = state_table[state].shift_table; - /* 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. */ - - if (shiftp) + for (i = 0; i < shiftp->nshifts; i++) { - k = shiftp->nshifts; - - for (i = 0; i < k; i++) - { - shift_state = shiftp->shifts[i]; - if (!shift_state) - continue; + token_number_t symbol; + int shift_state = shiftp->shifts[i]; + if (!shift_state) + continue; - symbol = state_table[shift_state].accessing_symbol; + symbol = states[shift_state]->accessing_symbol; - if (ISVAR (symbol)) - break; + if (ISVAR (symbol)) + break; - actrow[symbol] = shift_state; + actrow[symbol] = shift_state; - /* Do not use any default reduction if there is a shift for - error */ - if (symbol == error_token_number) - nodefault = 1; - } + /* Do not use any default reduction if there is a shift for + error */ + if (symbol == errtoken->number) + nodefault = 1; } - errp = err_table[state]; - /* See which tokens are an explicit error in this state (due to - %nonassoc). For them, record MINSHORT as the action. */ - - if (errp) + %nonassoc). For them, record SHRT_MIN as the action. */ + for (i = 0; i < errp->nerrs; i++) { - k = errp->nerrs; - - for (i = 0; i < k; i++) - { - symbol = errp->errs[i]; - actrow[symbol] = MINSHORT; - } + int symbol = errp->errs[i]; + actrow[symbol] = SHRT_MIN; } /* Now find the most common reduction and make it the default action for this state. */ - if (nreds >= 1 && !nodefault) + if (redp->nreds >= 1 && !nodefault) { - if (state_table[state].consistent) + if (state->consistent) default_rule = redp->rules[0]; else { - max = 0; - for (i = m; i < n; i++) + int max = 0; + for (i = 0; i < state->nlookaheads; i++) { - count = 0; - rule = -LAruleno[i]; + int count = 0; + int rule = -LArule[state->lookaheadsp + i]->number; + int j; for (j = 0; j < ntokens; j++) - { - if (actrow[j] == rule) - count++; - } + if (actrow[j] == rule) + count++; if (count > max) { @@ -476,11 +456,10 @@ action_row (int state) if (max > 0) { + int j; for (j = 0; j < ntokens; j++) - { - if (actrow[j] == default_rule) - actrow[j] = 0; - } + if (actrow[j] == default_rule) + actrow[j] = 0; default_rule = -default_rule; } @@ -491,11 +470,9 @@ action_row (int state) So replace any action which says "error" with "use default". */ if (default_rule == 0) - for (j = 0; j < ntokens; j++) - { - if (actrow[j] == MINSHORT) - actrow[j] = 0; - } + for (i = 0; i < ntokens; i++) + if (actrow[i] == SHRT_MIN) + actrow[i] = 0; return default_rule; } @@ -512,10 +489,8 @@ save_row (int state) count = 0; for (i = 0; i < ntokens; i++) - { - if (actrow[i] != 0) - count++; - } + if (actrow[i] != 0) + count++; if (count == 0) return; @@ -524,13 +499,11 @@ save_row (int state) tos[state] = sp2 = XCALLOC (short, count); for (i = 0; i < ntokens; i++) - { - if (actrow[i] != 0) - { - *sp1++ = i; - *sp2++ = actrow[i]; - } - } + if (actrow[i] != 0) + { + *sp1++ = i; + *sp2++ = actrow[i]; + } tally[state] = count; width[state] = sp1[-1] - sp[0] + 1; @@ -548,25 +521,123 @@ save_row (int state) static void token_actions (void) { - int i; + size_t i; short *yydefact = XCALLOC (short, nstates); actrow = XCALLOC (short, ntokens); for (i = 0; i < nstates; ++i) { - yydefact[i] = action_row (i); + yydefact[i] = action_row (states[i]); save_row (i); } - output_table_data (&output_obstack, yydefact, + output_short_table (&format_obstack, yydefact, yydefact[0], 1, nstates); - muscle_insert ("defact", obstack_finish (&output_obstack)); + muscle_insert ("defact", obstack_finish (&format_obstack)); 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) + { + fprintf (out, " case %d:\n", rule); + + if (!no_lines_flag) + fprintf (out, muscle_find ("linef"), + rules[rule].action_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 ? ";" : ""); + } +} + + +/*----------------------------. +| Output the guards to OOUT. | +`----------------------------*/ + +void +guards_output (FILE *out) +{ + int rule; + for (rule = 1; rule < nrules + 1; ++rule) + if (rules[rule].guard) + { + fprintf (out, " case %d:\n", rule); + + 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); + } +} + + +/*---------------------------------------. +| Output the tokens definition to OOUT. | +`---------------------------------------*/ + +void +token_definitions_output (FILE *out) +{ + int i; + int first = 1; + for (i = 0; i < ntokens; ++i) + { + symbol_t *symbol = symbols[i]; + int number = symbol->user_token_number; + + if (number == SALIAS) + continue; + /* Skip error token. */ + if (symbol == errtoken) + 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]]", + 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->number); + first = 0; + } +} + + static void save_column (int symbol, int default_state) { @@ -575,34 +646,28 @@ save_column (int symbol, int default_state) short *sp1; short *sp2; int count; - int symno; + 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 (to_state[i] != default_state) + count++; if (count == 0) return; - symno = symbol - ntokens + nstates; - 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]; - } - } + if (to_state[i] != default_state) + { + *sp1++ = from_state[i]; + *sp2++ = to_state[i]; + } tally[symno] = count; width[symno] = sp1[-1] - sp[0] + 1; @@ -611,14 +676,11 @@ save_column (int symbol, int default_state) static int default_goto (int symbol) { - int i; - int m; - int n; - int default_state; - int max; - - m = goto_map[symbol]; - n = goto_map[symbol + 1]; + 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; @@ -629,17 +691,12 @@ default_goto (int symbol) for (i = m; i < n; i++) state_count[to_state[i]]++; - max = 0; - default_state = -1; - for (i = 0; i < nstates; i++) - { - if (state_count[i] > max) - { - max = state_count[i]; - default_state = i; - } - } + if (state_count[i] > max) + { + max = state_count[i]; + default_state = i; + } return default_state; } @@ -668,9 +725,9 @@ goto_actions (void) yydefgoto[i - ntokens] = default_state; } - output_table_data (&output_obstack, yydefgoto, + output_short_table (&format_obstack, yydefgoto, yydefgoto[0], 1, nsyms - ntokens); - muscle_insert ("defgoto", obstack_finish (&output_obstack)); + muscle_insert ("defgoto", obstack_finish (&format_obstack)); XFREE (state_count); XFREE (yydefgoto); @@ -684,51 +741,42 @@ static void sort_actions (void) { int i; - int j; - int k; - int t; - int w; order = XCALLOC (short, nvectors); nentries = 0; for (i = 0; i < nvectors; i++) - { - if (tally[i] > 0) - { - t = tally[i]; - w = width[i]; - j = nentries - 1; + if (tally[i] > 0) + { + 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)) + j--; - while (j >= 0 && (width[order[j]] == w) && (tally[order[j]] < t)) - 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]; + for (k = nentries - 1; k > j; k--) + order[k + 1] = order[k]; - order[j + 1] = i; - nentries++; - } - } + order[j + 1] = i; + nentries++; + } } static int matching_state (int vector) { - int i; - int j; - int k; + int i = order[vector]; int t; int w; - int match; int prev; - i = order[vector]; - if (i >= nstates) + if (i >= (int) nstates) return -1; t = tally[i]; @@ -736,16 +784,16 @@ matching_state (int vector) for (prev = vector - 1; prev >= 0; prev--) { - j = order[prev]; + int j = order[prev]; + int k; + int match = 1; + if (width[j] != w || tally[j] != t) return -1; - match = 1; for (k = 0; match && k < t; k++) - { - if (tos[j][k] != tos[i][k] || froms[j][k] != froms[i][k]) - match = 0; - } + if (tos[j][k] != tos[i][k] || froms[j][k] != froms[i][k]) + match = 0; if (match) return j; @@ -758,42 +806,33 @@ matching_state (int vector) static int pack_vector (int vector) { - int i; + int i = order[vector]; int j; - int k; - int t; + int t = tally[i]; int loc = 0; - int ok; - short *from; - short *to; - - i = order[vector]; - t = tally[i]; + short *from = froms[i]; + short *to = tos[i]; assert (t); - from = froms[i]; - to = tos[i]; - - for (j = lowzero - from[0]; j < MAXTABLE; j++) + for (j = lowzero - from[0]; j < (int) table_size; j++) { - ok = 1; + 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 (loc > (int) table_size) + table_grow (loc); if (table[loc] != 0) ok = 0; } for (k = 0; ok && k < vector; k++) - { - if (pos[k] == j) - ok = 0; - } + if (pos[k] == j) + ok = 0; if (ok) { @@ -813,9 +852,9 @@ pack_vector (int vector) return j; } } - - berror ("pack_vector"); - return 0; /* JF keep lint happy */ +#define pack_vector_succeeded 0 + assert (pack_vector_succeeded); + return 0; } @@ -828,16 +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++) @@ -855,10 +894,8 @@ pack_table (void) for (i = 0; i < nvectors; i++) { - if (froms[i]) - XFREE (froms[i]); - if (tos[i]) - XFREE (tos[i]); + XFREE (froms[i]); + XFREE (tos[i]); } XFREE (froms); @@ -873,14 +910,14 @@ static void output_base (void) { /* Output pact. */ - output_table_data (&output_obstack, base, + output_short_table (&format_obstack, base, base[0], 1, nstates); - muscle_insert ("pact", obstack_finish (&output_obstack)); + muscle_insert ("pact", obstack_finish (&format_obstack)); /* Output pgoto. */ - output_table_data (&output_obstack, base, + output_short_table (&format_obstack, base, base[nstates], nstates + 1, nvectors); - muscle_insert ("pgoto", obstack_finish (&output_obstack)); + muscle_insert ("pgoto", obstack_finish (&format_obstack)); XFREE (base); } @@ -889,9 +926,9 @@ output_base (void) static void output_table (void) { - output_table_data (&output_obstack, table, + output_short_table (&format_obstack, table, table[0], 1, high + 1); - muscle_insert ("table", obstack_finish (&output_obstack)); + muscle_insert ("table", obstack_finish (&format_obstack)); XFREE (table); } @@ -899,18 +936,21 @@ output_table (void) static void output_check (void) { - output_table_data (&output_obstack, check, + output_short_table (&format_obstack, check, check[0], 1, high + 1); - muscle_insert ("check", obstack_finish (&output_obstack)); + 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) { + size_t i; nvectors = nstates + nvars; froms = XCALLOC (short *, nvectors); @@ -919,10 +959,8 @@ output_actions (void) width = XCALLOC (short, nvectors); token_actions (); - LIST_FREE (shifts, first_shift); - LIST_FREE (reductions, first_reduction); - XFREE (LA); - XFREE (LAruleno); + bitsetv_free (LA); + free (LArule); goto_actions (); XFREE (goto_map + ntokens); @@ -936,123 +974,114 @@ output_actions (void) output_table (); output_check (); - XFREE (state_table); -} - - -/*------------------------------------------------------------. -| Copy the parser code from SKEL_FILENAME into OOUT obstack. | -| and do the muscle substitution. | -`------------------------------------------------------------*/ - -static void -output_parser (const char *skel_filename, struct obstack *oout) -{ - int c; - FILE *fskel; - size_t line; - fskel = xfopen (skel_filename, "r"); - - /* New output code. */ - line = 1; - c = getc (fskel); - while (c != EOF) + for (i = 0; i < nstates; ++i) { - if (c != '%') - { - if (c == '\n') - ++line; - obstack_1grow (oout, c); - c = getc (fskel); - } - else if ((c = getc (fskel)) == '%') - { - /* Read the muscle. */ - const char *muscle_key = 0; - const char *muscle_value = 0; - - while (isalnum (c = getc (fskel)) || c == '_') - obstack_1grow (&muscle_obstack, c); - obstack_1grow (&muscle_obstack, 0); - - /* Output the right value, or see if it's something special. */ - muscle_key = obstack_finish (&muscle_obstack); - muscle_value = muscle_find (muscle_key); - if (muscle_value) - obstack_sgrow (oout, muscle_value); - else if (!strcmp (muscle_key, "line")) - obstack_fgrow1 (oout, "%d", line + 1); - else if (!strcmp (muscle_key, "input_line")) - obstack_fgrow1 (oout, "%d", lineno); - /* FIXME: Insert the code to recognize %%sub-skeleton for exemple. */ - else - { - obstack_sgrow (oout, "%%"); - obstack_sgrow (oout, muscle_key); - } - } - else - obstack_1grow (oout, '%'); + free (states[i]->shifts); + XFREE (states[i]->reductions); + free (states[i]->errs); + free (states[i]); } - - /* End. */ - xfclose (fskel); + XFREE (states); } -/*----------------------------------------. -| Prepare the master parser to be output | -`----------------------------------------*/ + +/*---------------------------. +| Call the skeleton parser. | +`---------------------------*/ static void -output_master_parser (void) +output_skeleton (void) { - if (!skeleton) - { - if (semantic_parser) - skeleton = skeleton_find ("BISON_HAIRY", BISON_HAIRY); - else - skeleton = skeleton_find ("BISON_SIMPLE", BISON_SIMPLE); - } - output_parser (skeleton, &table_obstack); -} - - -/* FIXME. */ - -#define MUSCLE_INSERT_INT(Key, Value) \ -{ \ - obstack_fgrow1 (&muscle_obstack, "%d", Value); \ - obstack_1grow (&muscle_obstack, 0); \ - muscle_insert (Key, obstack_finish (&muscle_obstack)); \ -} - -#define MUSCLE_INSERT_STRING(Key, Value) \ -{ \ - obstack_sgrow (&muscle_obstack, Value); \ - obstack_1grow (&muscle_obstack, 0); \ - muscle_insert (Key, obstack_finish (&muscle_obstack)); \ -} - -#define MUSCLE_INSERT_PREFIX(Key, Value) \ -{ \ - obstack_fgrow2 (&muscle_obstack, "%s%s", spec_name_prefix, Value); \ - obstack_1grow (&muscle_obstack, 0); \ - muscle_insert (Key, obstack_finish (&muscle_obstack)); \ + /* Store the definition of all the muscles. */ + const char *tempdir = getenv ("TMPDIR"); + char *tempfile = NULL; + FILE *out = NULL; + int fd; + + if (tempdir == NULL) + tempdir = DEFAULT_TMPDIR; + tempfile = xmalloc (strlen (tempdir) + 11); + sprintf (tempfile, "%s/bsnXXXXXX", tempdir); + fd = mkstemp (tempfile); + if (fd == -1) + error (EXIT_FAILURE, errno, "%s", tempfile); + + out = fdopen (fd, "w"); + if (out == NULL) + error (EXIT_FAILURE, errno, "%s", tempfile); + + /* There are no comments, especially not `#': we do want M4 expansion + after `#': think of CPP macros! */ + 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); + token_definitions_output (out); + fputs ("])\n\n", out); + + muscles_m4_output (out); + + fputs ("m4_wrap([m4_divert_pop(0)])\n", out); + 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); + } } 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 ("ntbase", ntokens); - MUSCLE_INSERT_INT ("verbose", 0); + 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"); + + /* 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 ("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); @@ -1060,14 +1089,26 @@ prepare (void) MUSCLE_INSERT_INT ("ntokens", ntokens); MUSCLE_INSERT_INT ("locations_flag", locations_flag); + MUSCLE_INSERT_INT ("defines_flag", defines_flag); - /* We need to save the actions in the muscle %%action. */ - muscle_insert ("action", obstack_finish (&action_obstack)); + /* Copy definitions in directive. */ + obstack_1grow (&attrs_obstack, 0); + muscle_insert ("prologue", obstack_finish (&attrs_obstack)); - if (spec_name_prefix) - MUSCLE_INSERT_STRING ("prefix", spec_name_prefix); + /* Find the right skeleton file. */ + if (!skeleton) + { + if (semantic_parser) + skeleton = "bison.hairy"; + else + skeleton = "bison.simple"; + } + + /* Parse the skeleton file and output the needed parsers. */ + muscle_insert ("skeleton", skeleton); } + /*----------------------------------------------------------. | Output the parsing tables and the parser code to ftable. | `----------------------------------------------------------*/ @@ -1075,30 +1116,20 @@ prepare (void) void output (void) { - obstack_init (&output_obstack); - - LIST_FREE (core, first_state); + obstack_init (&format_obstack); - output_token_translations (); - output_gram (); - - XFREE (ritem); - if (semantic_parser) - output_stos (); - output_rule_data (); - XFREE (user_toknums); + prepare_tokens (); + prepare_rules (); + prepare_states (); output_actions (); -#if 0 - if (!no_parser_flag) */ -#endif prepare (); - /* Copy definitions in directive. */ - muscle_insert ("prologue", obstack_finish (&attrs_obstack)); - output_master_parser (); + /* Process the selected skeleton file. */ + output_skeleton (); - obstack_free (&muscle_obstack, 0); - obstack_free (&output_obstack, 0); - obstack_free (&action_obstack, 0); + obstack_free (&muscle_obstack, NULL); + obstack_free (&format_obstack, NULL); + obstack_free (&action_obstack, NULL); + obstack_free (&attrs_obstack, NULL); }