X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/796d61fbdd7bd5db9947451a204c76b5d046b308..355e7c1cd1341e7caa4b57536abd1124da2f2ba2:/src/output.c diff --git a/src/output.c b/src/output.c index 34560bb5..df751cb0 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. @@ -19,79 +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 "bitsetv.h" #include "quotearg.h" +#include "error.h" #include "getargs.h" #include "files.h" #include "gram.h" @@ -100,9 +100,16 @@ #include "output.h" #include "lalr.h" #include "reader.h" +#include "symtab.h" #include "conflicts.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; @@ -121,36 +128,38 @@ static int lowzero; static int high; struct obstack muscle_obstack; -struct obstack output_obstack; +static struct obstack format_obstack; int error_verbose = 0; /* Returns the number of lines of S. */ -static size_t +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 (s[i] == '\n') + ++lines; + return lines; } -/* FIXME. */ +/*----------------------------------------------------------------. +| Format the FIRST and then TABLE_DATA[BEGIN..END[ into OOUT, and | +| return the number of bits needed for its longuest value. | +`----------------------------------------------------------------*/ -static inline void +static inline long int output_table_data (struct obstack *oout, short *table_data, short first, - short begin, - short end) + int begin, + int end) { + long int max = first; int i; int j = 1; @@ -166,148 +175,148 @@ output_table_data (struct obstack *oout, else ++j; obstack_fgrow1 (oout, "%6d", table_data[i]); + if (table_data[i] > max) + max = table_data[i]; } obstack_1grow (oout, 0); + + return max; } +/*-----------------------------------------------------------------. +| Prepare the muscles related to the tokens: translate, tname, and | +| toknum. | +`-----------------------------------------------------------------*/ + static void -output_token_translations (void) +prepare_tokens (void) { - output_table_data (&output_obstack, token_translations, - 0, 1, max_user_token_number + 1); - muscle_insert ("translate", obstack_finish (&output_obstack)); + long int max = output_table_data (&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); -} - -static void -output_gram (void) -{ { 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_table_data (&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) -{ - 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 *rhsp; + int r; + int i = 0; + short *rhs = XMALLOC (short, nritems); + short *prhs = XMALLOC (short, nrules + 1); + short *r1 = XMALLOC (short, 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); - { - 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); - } + output_table_data (&format_obstack, rhs, ritem[0], 1, nritems); + muscle_insert ("rhs", obstack_finish (&format_obstack)); + output_table_data (&format_obstack, prhs, 0, 1, nrules + 1); + muscle_insert ("prhs", 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, tags[i])); - /* 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 (&output_obstack, "\n "); - j = 2; - } + output_table_data (&format_obstack, rline, 0, 1, nrules + 1); + muscle_insert ("rline", obstack_finish (&format_obstack)); - obstack_sgrow (&output_obstack, cp); - obstack_sgrow (&output_obstack, ", "); - j += strsize; - } - /* add a NULL entry to list of tokens */ - obstack_sgrow (&output_obstack, "NULL"); + output_table_data (&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_table_data (&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); +static void +prepare_states (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)); } + /*------------------------------------------------------------------. | 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 | @@ -323,62 +332,45 @@ output_rule_data (void) `------------------------------------------------------------------*/ static int -action_row (int state) +action_row (state_t *state) { int i; - int j; - int m = 0; - int n = 0; - int default_rule; - int nreds; - int rule; - int shift_state; - int symbol; - 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]->reductions; - - 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--) - /* 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 (BITISSET (LA (i), j)) - actrow[j] = -LAruleno[i]; - } + 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; } /* 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. */ - shiftp = state_table[state]->shifts; for (i = 0; i < shiftp->nshifts; i++) { - shift_state = shiftp->shifts[i]; + int 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; @@ -393,35 +385,31 @@ action_row (int state) /* See which tokens are an explicit error in this state (due to %nonassoc). For them, record MINSHORT as the action. */ - errp = state_table[state]->errs; - - if (errp) - for (i = 0; i < errp->nerrs; i++) - { - symbol = errp->errs[i]; - actrow[symbol] = MINSHORT; - } + 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 (nreds >= 1 && !nodefault) + if (redp->nreds >= 1 && !nodefault) { - if (state_table[state]->consistent) + if (state->consistent) default_rule = redp->rules[0]; else { int max = 0; - for (i = m; i < n; i++) + for (i = 0; i < state->nlookaheads; i++) { int count = 0; - rule = -LAruleno[i]; + 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) { @@ -435,11 +423,10 @@ 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; } @@ -450,11 +437,9 @@ 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] == MINSHORT) + actrow[i] = 0; return default_rule; } @@ -503,19 +488,19 @@ 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_table_data (&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); @@ -526,38 +511,100 @@ token_actions (void) | Output the actions to OOUT. | `-----------------------------*/ -static void -actions_output (FILE *out, size_t *line) +void +actions_output (FILE *out) { int rule; for (rule = 1; rule < nrules + 1; ++rule) - if (rule_table[rule].action) + if (rules[rule].action) { fprintf (out, " case %d:\n", rule); if (!no_lines_flag) fprintf (out, muscle_find ("linef"), - rule_table[rule].action_line, + 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", - rule_table[rule].action, + 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); - /* We always output 4 '\n' per action. */ - *line += 4; - /* Plus one if !no_lines_flag. */ if (!no_lines_flag) - ++*line; - /* Get the number of lines written by the user. */ - *line += get_lines_number (rule_table[rule].action); + 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->number == error_token_number) + 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) { @@ -566,7 +613,7 @@ 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]; @@ -579,8 +626,6 @@ save_column (int symbol, int default_state) if (count == 0) return; - symno = symbol - ntokens + nstates; - froms[symno] = sp1 = sp = XCALLOC (short, count); tos[symno] = sp2 = XCALLOC (short, count); @@ -598,14 +643,11 @@ 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; @@ -616,9 +658,6 @@ 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) { @@ -653,9 +692,9 @@ goto_actions (void) yydefgoto[i - ntokens] = default_state; } - output_table_data (&output_obstack, yydefgoto, + output_table_data (&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); @@ -669,10 +708,6 @@ static void sort_actions (void) { int i; - int j; - int k; - int t; - int w; order = XCALLOC (short, nvectors); nentries = 0; @@ -680,9 +715,10 @@ sort_actions (void) for (i = 0; i < nvectors; i++) if (tally[i] > 0) { - t = tally[i]; - w = width[i]; - j = nentries - 1; + int k; + int t = tally[i]; + int w = width[i]; + int j = nentries - 1; while (j >= 0 && (width[order[j]] < w)) j--; @@ -702,16 +738,12 @@ sort_actions (void) 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]; @@ -719,11 +751,13 @@ 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; @@ -739,26 +773,19 @@ 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++) { - ok = 1; + int k; + int ok = 1; for (k = 0; ok && k < t; k++) { @@ -792,8 +819,8 @@ pack_vector (int vector) return j; } } - - assert (!"pack_vector"); +#define pack_vector_succeeded 0 + assert (pack_vector_succeeded); return 0; } @@ -850,14 +877,14 @@ static void output_base (void) { /* Output pact. */ - output_table_data (&output_obstack, base, + output_table_data (&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_table_data (&format_obstack, base, base[nstates], nstates + 1, nvectors); - muscle_insert ("pgoto", obstack_finish (&output_obstack)); + muscle_insert ("pgoto", obstack_finish (&format_obstack)); XFREE (base); } @@ -866,9 +893,9 @@ output_base (void) static void output_table (void) { - output_table_data (&output_obstack, table, + output_table_data (&format_obstack, table, table[0], 1, high + 1); - muscle_insert ("table", obstack_finish (&output_obstack)); + muscle_insert ("table", obstack_finish (&format_obstack)); XFREE (table); } @@ -876,19 +903,21 @@ output_table (void) static void output_check (void) { - output_table_data (&output_obstack, check, + output_table_data (&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) { - int i; + size_t i; nvectors = nstates + nvars; froms = XCALLOC (short *, nvectors); @@ -897,8 +926,8 @@ output_actions (void) width = XCALLOC (short, nvectors); token_actions (); - XFREE (LA); - XFREE (LAruleno); + bitsetv_free (LA); + free (LArule); goto_actions (); XFREE (goto_map + ntokens); @@ -915,121 +944,89 @@ output_actions (void) for (i = 0; i < nstates; ++i) { - XFREE (state_table[i]->shifts); - XFREE (state_table[i]->reductions); - XFREE (state_table[i]->errs); - free (state_table[i]); + free (states[i]->shifts); + XFREE (states[i]->reductions); + free (states[i]->errs); + free (states[i]); } - XFREE (state_table); + XFREE (states); } -/*------------------------------------------------------------. -| Copy the parser code from SKEL_FILENAME into OOUT obstack. | -| and do the muscle substitution. | -`------------------------------------------------------------*/ +/*---------------------------. +| Call the skeleton parser. | +`---------------------------*/ static void -output_parser (const char *skel_filename, FILE *out) +output_skeleton (void) { - int c; - FILE *fskel; - size_t line; - - fskel = xfopen (skel_filename, "r"); - - /* New output code. */ - line = 1; - c = getc (fskel); - while (c != EOF) - { - if (c != '%') - { - if (c == '\n') - ++line; - putc (c, out); - 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 (!strcmp (muscle_key, "actions")) - actions_output (out, &line); - else if (!strcmp (muscle_key, "line")) - fprintf (out, "%d", line); - else if (muscle_value) - { - fputs (muscle_value, out); - line += get_lines_number (muscle_value); - } - else - { - fputs ("%%", out); - fputs (muscle_key, out); - } - } - else - putc ('%', out); - } - - /* End. */ - xfclose (fskel); -} - -/*----------------------------------------. -| Prepare the master parser to be output | -`----------------------------------------*/ - -static void -output_master_parser (void) -{ - FILE *parser = xfopen (parser_file_name, "w"); - if (!skeleton) - { - if (semantic_parser) - skeleton = skeleton_find ("BISON_HAIRY", BISON_HAIRY); - else - skeleton = skeleton_find ("BISON_SIMPLE", BISON_SIMPLE); - } - muscle_insert ("skeleton", skeleton); - muscle_insert ("parser-file-name", parser_file_name); - - output_parser (skeleton, parser); - xfclose (parser); -} - - -/* 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)); \ -} + /* 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); -#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)); \ + /* 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 @@ -1042,57 +1039,39 @@ prepare (void) 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 ("error-verbose", error_verbose); - MUSCLE_INSERT_STRING ("prefix", spec_name_prefix); + 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); MUSCLE_INSERT_INT ("nstates", nstates); MUSCLE_INSERT_INT ("ntokens", ntokens); - MUSCLE_INSERT_INT ("locations-flag", locations_flag); -} - + MUSCLE_INSERT_INT ("locations_flag", locations_flag); + MUSCLE_INSERT_INT ("defines_flag", defines_flag); -/*-------------------------. -| Output the header file. | -`-------------------------*/ + /* Copy definitions in directive. */ + obstack_1grow (&attrs_obstack, 0); + muscle_insert ("prologue", obstack_finish (&attrs_obstack)); -static void -header_output (void) -{ - FILE *out = xfopen (spec_defines_file, "w"); - char *macro_name = compute_header_macro (); - - fprintf (out, "#ifndef %s\n", macro_name); - fprintf (out, "# define %s\n\n", macro_name); - - fputs (muscle_find ("tokendef"), out); - fprintf (out, "\ -#ifndef YYSTYPE\n\ -typedef %s -yystype;\n\ -# define YYSTYPE yystype\n\ -#endif\n", - muscle_find ("stype")); - - if (!pure_parser) - fprintf (out, "\nextern YYSTYPE %slval;\n", - spec_name_prefix); - if (semantic_parser) + /* Find the right skeleton file. */ + if (!skeleton) { - int i; - - for (i = ntokens; i < nsyms; i++) - /* don't make these for dummy nonterminals made by gensym. */ - if (*tags[i] != '@') - fprintf (out, "# define\tNT%s\t%d\n", tags[i], i); + if (semantic_parser) + skeleton = "bison.hairy"; + else + skeleton = "bison.simple"; } - fprintf (out, "\n#endif /* not %s */\n", macro_name); - free (macro_name); - xfclose (out); + /* Parse the skeleton file and output the needed parsers. */ + muscle_insert ("skeleton", skeleton); } @@ -1103,31 +1082,20 @@ yystype;\n\ void output (void) { - obstack_init (&output_obstack); - - output_token_translations (); - output_gram (); + obstack_init (&format_obstack); - XFREE (ritem); - if (semantic_parser) - output_stos (); - output_rule_data (); - XFREE (user_toknums); + prepare_tokens (); + prepare_rules (); + prepare_states (); output_actions (); prepare (); - /* Copy definitions in directive. */ - obstack_1grow (&attrs_obstack, 0); - muscle_insert ("prologue", obstack_finish (&attrs_obstack)); - /* Output the parser. */ - output_master_parser (); - /* Output the header if needed. */ - if (defines_flag) - header_output (); + /* Process the selected skeleton file. */ + output_skeleton (); - free (rule_table + 1); - 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); }